+Version 1.1-cvs Work in progress
+
+ * Use libevent to handle I/O events and timeouts.
+
+ * Use splay trees instead of AVL trees.
+
+ Version 1.0.9 Dec 26 2008
+
+ * Fixed tinc as a service under Windows 2003.
+
+ * Fixed reading configuration files that do not end with a newline.
+
+ * Fixed crashes in situations where hostnames could not be resolved or hosts
+ would disconnect at the same time as session keys were exchanged.
+
+ * Improved default settings of tun and tap devices on BSD platforms.
+
+ * Make IPv6 sockets bind only to IPv6 on Linux.
+
+ * Enable path MTU discovery by default.
+
+ * Fixed a memory leak that occured when connections were closed.
+
Version 1.0.8 May 16 2007
* Fixed some memory and resource leaks.
-This is the README file for tinc version 1.0.9. Installation
+This is the README file for tinc version 1.1-cvs. Installation
instructions may be found in the INSTALL file.
- tinc is Copyright (C) 1998-2007 by:
-tinc is Copyright (C) 1998-2008 by:
++tinc is Copyright (C) 1998-2009 by:
Ivo Timmermans,
Guus Sliepen <guus@tinc-vpn.org>,
Compatibility
-------------
-Version 1.0.9 is compatible with 1.0pre8, 1.0 and later, but not with older
+Version 1.1-cvs is compatible with 1.0pre8, 1.0 and later, but not with older
versions of tinc.
library whether or not you plan to enable compression. You can find it at
http://www.oberhumer.com/opensource/lzo/.
+Since 1.1, the libevent library is used for the main event loop. You can find
+it at http://monkey.org/~provos/libevent/.
+
In order to compile tinc, you will need a GNU C compiler environment.
This is the info manual for @value{PACKAGE} version @value{VERSION}, a Virtual Private Network daemon.
- Copyright @copyright{} 1998-2006 Ivo Timmermans,
+ Copyright @copyright{} 1998-2009 Ivo Timmermans,
Guus Sliepen <guus@@tinc-vpn.org> and
Wessel Dankers <wsl@@tinc-vpn.org>.
@cindex copyright
This is the info manual for @value{PACKAGE} version @value{VERSION}, a Virtual Private Network daemon.
- Copyright @copyright{} 1998-2007 Ivo Timmermans,
+ Copyright @copyright{} 1998-2009 Ivo Timmermans,
Guus Sliepen <guus@@tinc-vpn.org> and
Wessel Dankers <wsl@@tinc-vpn.org>.
* Installation::
* Configuration::
* Running tinc::
+* Controlling tinc::
* Technical information::
* Platform specific information::
* About us::
@section Configuring the kernel
@menu
- * Configuration of Linux kernels 2.1.60 up to 2.4.0::
- * Configuration of Linux kernels 2.4.0 and higher::
+ * Configuration of Linux kernels::
* Configuration of FreeBSD kernels::
* Configuration of OpenBSD kernels::
* Configuration of NetBSD kernels::
@c ==================================================================
- @node Configuration of Linux kernels 2.1.60 up to 2.4.0
- @subsection Configuration of Linux kernels 2.1.60 up to 2.4.0
-
- @cindex ethertap
- For kernels up to 2.4.0, you need a kernel that supports the ethertap device.
- Most distributions come with kernels that already support this.
- If not, here are the options you have to turn on when configuring a new kernel:
-
- @example
- Code maturity level options
- [*] Prompt for development and/or incomplete code/drivers
- Networking options
- [*] Kernel/User netlink socket
- <M> Netlink device emulation
- Network device support
- <M> Ethertap network tap
- @end example
-
- If you want to run more than one instance of tinc or other programs that use
- the ethertap, you have to compile the ethertap driver as a module, otherwise
- you can also choose to compile it directly into the kernel.
-
- If you decide to build any of these as dynamic kernel modules, it's a good idea
- to add these lines to @file{/etc/modules.conf}:
-
- @example
- alias char-major-36 netlink_dev
- alias tap0 ethertap
- options tap0 -o tap0 unit=0
- alias tap1 ethertap
- options tap1 -o tap1 unit=1
- ...
- alias tap@emph{N} ethertap
- options tap@emph{N} -o tap@emph{N} unit=@emph{N}
- @end example
-
- Add as much alias/options lines as necessary.
-
-
- @c ==================================================================
- @node Configuration of Linux kernels 2.4.0 and higher
- @subsection Configuration of Linux kernels 2.4.0 and higher
+ @node Configuration of Linux kernels
+ @subsection Configuration of Linux kernels
@cindex Universal tun/tap
- For kernels 2.4.0 and higher, you need a kernel that supports the Universal tun/tap device.
+ For tinc to work, you need a kernel that supports the Universal tun/tap device.
Most distributions come with kernels that already support this.
Here are the options you have to turn on when configuring a new kernel:
It's not necessary to compile this driver as a module, even if you are going to
run more than one instance of tinc.
- If you have an early 2.4 kernel, you can choose both the tun/tap driver and the
- `Ethertap network tap' device. This latter is marked obsolete, and chances are
- that it won't even function correctly anymore. Make sure you select the
- universal tun/tap driver.
-
If you decide to build the tun/tap driver as a kernel module, add these lines
to @file{/etc/modules.conf}:
For OpenBSD version 2.9 and higher,
the tun driver is included in the default kernel configuration.
There is also a kernel patch from @uref{http://diehard.n-r-g.com/stuff/openbsd/}
- which adds a tap device to OpenBSD.
- This should work with tinc.
-
+ which adds a tap device to OpenBSD which should work with tinc,
+ but with recent versions of OpenBSD,
+ a tun device can act as a tap device by setting the link0 option with ifconfig.
@c ==================================================================
@node Configuration of NetBSD kernels
* OpenSSL::
* zlib::
* lzo::
+* libevent::
@end menu
default).
+@c ==================================================================
+@node libevent
+@subsection libevent
+
+@cindex libevent
+For the main event loop, tinc uses the libevent library.
+
+If this library is not installed, you wil get an error when configuring
+tinc for build.
+
+You can use your operating system's package manager to install this if
+available. Make sure you install the development AND runtime versions
+of this package.
+
+If you have to install libevent manually, you can get the source code
+from @url{http://monkey.org/~provos/libevent/}. Instructions on how to configure,
+build and install this package are included within the package. Please
+make sure you build development and runtime libraries (which is the
+default).
+
+
@c
@c
@c
@subsection Device files
@cindex device files
- First, you'll need the special device file(s) that form the interface
- between the kernel and the daemon.
-
- The permissions for these files have to be such that only the super user
- may read/write to this file. You'd want this, because otherwise
- eavesdropping would become a bit too easy. This does, however, imply
- that you'd have to run tincd as root.
+ Most operating systems nowadays come with the necessary device files by default,
+ or they have a mechanism to create them on demand.
- If you use Linux and have a kernel version prior to 2.4.0, you have to make the
- ethertap devices:
+ If you use Linux and do not have udev installed,
+ you may need to create the following device file if it does not exist:
@example
- mknod -m 600 /dev/tap0 c 36 16
- mknod -m 600 /dev/tap1 c 36 17
- ...
- mknod -m 600 /dev/tap@emph{N} c 36 @emph{N+16}
+ mknod -m 600 /dev/net/tun c 10 200
@end example
- There is a maximum of 16 ethertap devices.
-
- If you use the universal tun/tap driver, you have to create the
- following device file (unless it already exist):
-
- @example
- mknod -m 600 /dev/tun c 10 200
- @end example
-
- If you use Linux, and you run the new 2.4 kernel using the devfs filesystem,
- then the tun/tap device will probably be automatically generated as
- @file{/dev/net/tun}.
-
- Unlike the ethertap device, you do not need multiple device files if
- you are planning to run multiple tinc daemons.
-
@c ==================================================================
@node Other files
Note that you can only use one device per daemon.
See also @ref{Device files}.
+ @cindex DeviceType
+ @item DeviceType = <tun|tunnohead|tunifhead|tap> (only supported on BSD platforms)
+ The type of the virtual network device.
+ Tinc will normally automatically select the right type, and this option should not be used.
+ However, in case tinc does not seem to correctly interpret packets received from the virtual network device,
+ using this option might help.
+
+ @table @asis
+ @item tun
+ Set type to tun.
+ Depending on the platform, this can either be with or without an address family header (see below).
+
+ @cindex tunnohead
+ @item tunnohead
+ Set type to tun without an address family header.
+ Tinc will expect packets read from the virtual network device to start with an IP header.
+ On some platforms IPv6 packets cannot be read from or written to the device in this mode.
+
+ @cindex tunifhead
+ @item tunifhead
+ Set type to tun with an address family header.
+ Tinc will expect packets read from the virtual network device
+ to start with a four byte header containing the address family,
+ followed by an IP header.
+ This mode should support both IPv4 and IPv6 packets.
+
+ @item tap
+ Set type to tap.
+ Tinc will expect packets read from the virtual network device
+ to start with an Ethernet header.
+ @end table
+
+ @cindex GraphDumpFile
+ @item GraphDumpFile = <@var{filename}> [experimental]
+ If this option is present,
+ tinc will dump the current network graph to the file @var{filename}
+ every minute, unless there were no changes to the graph.
+ The file is in a format that can be read by graphviz tools.
+ If @var{filename} starts with a pipe symbol |,
+ then the rest of the filename is interpreted as a shell command
+ that is executed, the graph is then sent to stdin.
+
@cindex Hostnames
@item Hostnames = <yes|no> (no)
This option selects whether IP addresses (both real and on the VPN)
@cindex Name
@item Name = <@var{name}> [required]
- This is a symbolic name for this connection. It can be anything
+ This is a symbolic name for this connection.
+ The name should consist only of alfanumeric and underscore characters (a-z, A-Z, 0-9 and _).
@cindex PingInterval
@item PingInterval = <@var{seconds}> (60)
@cindex PrivateKeyFile
@item PrivateKeyFile = <@var{path}> (@file{@value{sysconfdir}/tinc/@var{netname}/rsa_key.priv})
This is the full path name of the RSA private key file that was
-generated by @samp{tincd --generate-keys}. It must be a full path, not a
+generated by @samp{tincctl generate-keys}. It must be a full path, not a
relative directory.
Note that there must be exactly one of PrivateKey
Can be anything from 0
up to the length of the digest produced by the digest algorithm.
+ @cindex PMTU
+ @item PMTU = <@var{mtu}> (1514)
+ This option controls the initial path MTU to this node.
+
+ @cindex PMTUDiscovery
+ @item PMTUDiscovery = <yes|no> (yes)
+ When this option is enabled, tinc will try to discover the path MTU to this node.
+ After the path MTU has been discovered, it will be enforced on the VPN.
+
@cindex Port
@item Port = <@var{port}> (655)
This is the port this tinc daemon listens on.
@cindex PublicKeyFile
@item PublicKeyFile = <@var{path}> [obsolete]
This is the full path name of the RSA public key file that was generated
-by @samp{tincd --generate-keys}. It must be a full path, not a relative
+by @samp{tincctl generate-keys}. It must be a full path, not a relative
directory.
@cindex PEM format
connection with that host.
@cindex Subnet
- @item Subnet = <@var{address}[/@var{prefixlength}]>
+ @item Subnet = <@var{address}[/@var{prefixlength}[#@var{weight}]]>
The subnet which this tinc daemon will serve.
Tinc tries to look up which other daemon it should send a packet to by searching the appropiate subnet.
If the packet matches a subnet,
/22. This conforms to standard CIDR notation as described in
@uref{ftp://ftp.isi.edu/in-notes/rfc1519.txt, RFC1519}
+ A Subnet can be given a weight to indicate its priority over identical Subnets
+ owned by different nodes. The default weight is 10. Lower values indicate
+ higher priority. Packets will be sent to the node with the highest priority,
+ unless that node is not reachable, in which case the node with the next highest
+ priority will be tried, and so on.
+
@cindex TCPonly
- @item TCPonly = <yes|no> (no) [experimental]
+ @item TCPonly = <yes|no> (no)
If this variable is set to yes, then the packets are tunnelled over a
TCP connection instead of a UDP connection. This is especially useful
for those who want to run a tinc daemon from behind a masquerading
you can easily create a public/private keypair by entering the following command:
@example
-tincd -n @var{netname} -K
+tincctl -n @var{netname} generate-keys
@end example
Tinc will generate a public and a private key and ask you where to put them.
A, B, C and D all have generated a public/private keypair with the following command:
@example
-tincd -n company -K
+tincctl -n company generate-keys
@end example
The private key is stored in @file{@value{sysconfdir}/tinc/company/rsa_key.priv},
Set debug level to @var{level}. The higher the debug level, the more gets
logged. Everything goes via syslog.
-@item -k, --kill[=@var{signal}]
-Attempt to kill a running tincd (optionally with the specified @var{signal} instead of SIGTERM) and exit.
-Use it in conjunction with the -n option to make sure you kill the right tinc daemon.
-Under native Windows the optional argument is ignored,
-the service will always be stopped and removed.
-
@item -n, --net=@var{netname}
Use configuration for net @var{netname}. @xref{Multiple networks}.
-@item -K, --generate-keys[=@var{bits}]
-Generate public/private keypair of @var{bits} length. If @var{bits} is not specified,
-1024 is the default. tinc will ask where you want to store the files,
-but will default to the configuration directory (you can use the -c or -n option
-in combination with -K). After that, tinc will quit.
+@item --controlsocket=@var{filename}
+Open control socket at @var{filename}. If unspecified, the default is
+@file{@value{localstatedir}/run/tinc.@var{netname}.control}.
@item -L, --mlock
Lock tinc into main memory.
Write log entries to a file instead of to the system logging facility.
If @var{file} is omitted, the default is @file{@value{localstatedir}/log/tinc.@var{netname}.log}.
-@item --pidfile=@var{file}
-Write PID to @var{file} instead of @file{@value{localstatedir}/run/tinc.@var{netname}.pid}.
-
@item --bypass-security
Disables encryption and authentication.
Only useful for debugging.
@c from the manpage
@table @samp
-@item ALRM
-Forces tinc to try to connect to all uplinks immediately.
-Usually tinc attempts to do this itself,
-but increases the time it waits between the attempts each time it failed,
-and if tinc didn't succeed to connect to an uplink the first time after it started,
-it defaults to the maximum time of 15 minutes.
-
@item HUP
Partially rereads configuration files.
Connections to hosts whose host config file are removed are closed.
New outgoing connections specified in @file{tinc.conf} will be made.
-@item INT
-Temporarily increases debug level to 5.
-Send this signal again to revert to the original level.
-
-@item USR1
-Dumps the connection list to syslog.
-
-@item USR2
-Dumps virtual network device statistics, all known nodes, edges and subnets to syslog.
-
-@item WINCH
-Purges all information remembered about unreachable nodes.
-
@end table
@c ==================================================================
@item The output of any command that fails to work as it should (like ping or traceroute).
@end itemize
+@c ==================================================================
+@node Controlling tinc
+@chapter Controlling tinc
+
+You can control and inspect a running @samp{tincd} through the @samp{tincctl}
+command. A quick example:
+
+@example
+tincctl -n @var{netname} reload
+@end example
+
+@menu
+* tincctl runtime options::
+* tincctl commands::
+@end menu
+
+
+@c ==================================================================
+@node tincctl runtime options
+@section tincctl runtime options
+
+@c from the manpage
+@table @option
+@item -c, --config=@var{path}
+Read configuration options from the directory @var{path}. The default is
+@file{@value{sysconfdir}/tinc/@var{netname}/}.
+
+@item -n, --net=@var{netname}
+Use configuration for net @var{netname}. @xref{Multiple networks}.
+
+@item --controlsocket=@var{filename}
+Open control socket at @var{filename}. If unspecified, the default is
+@file{@value{localstatedir}/run/tinc.@var{netname}.control}.
+
+@item --help
+Display a short reminder of runtime options and commands, then terminate.
+
+@item --version
+Output version information and exit.
+
+@end table
+
+
+@c ==================================================================
+@node tincctl commands
+@section tincctl commands
+
+@c from the manpage
+@table @code
+
+@item start
+Start @samp{tincd}.
+
+@item stop
+Stop @samp{tincd}.
+
+@item restart
+Restart @samp{tincd}.
+
+@item reload
+Partially rereads configuration files. Connections to hosts whose host
+config files are removed are closed. New outgoing connections specified
+in @file{tinc.conf} will be made.
+
+@item pid
+Shows the PID of the currently running @samp{tincd}.
+
+@item generate-keys [@var{bits}]
+Generate public/private keypair of @var{bits} length. If @var{bits} is not specified,
+1024 is the default. tinc will ask where you want to store the files,
+but will default to the configuration directory (you can use the -c or -n
+option).
+
+@item dump nodes
+Dump a list of all known nodes in the VPN.
+
+@item dump edges
+Dump a list of all known connections in the VPN.
+
+@item dump subnets
+Dump a list of all known subnets in the VPN.
+
+@item dump connections
+Dump a list of all meta connections with ourself.
+
+@item dump graph
+Dump a graph of the VPN in dotty format.
+
+@item purge
+Purges all information remembered about unreachable nodes.
+
+@item debug @var{level}
+Sets debug level to @var{level}.
+
+@item retry
+Forces tinc to try to connect to all uplinks immediately.
+Usually tinc attempts to do this itself,
+but increases the time it waits between the attempts each time it failed,
+and if tinc didn't succeed to connect to an uplink the first time after it started,
+it defaults to the maximum time of 15 minutes.
+
+@end table
+
+
@c ==================================================================
@node Technical information
@chapter Technical information
/*
device.c -- Interaction BSD tun/tap device
Copyright (C) 2001-2005 Ivo Timmermans,
- 2001-2007 Guus Sliepen <guus@tinc-vpn.org>
+ 2001-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "net.h"
#include "route.h"
#include "utils.h"
+ #include "xalloc.h"
#define DEFAULT_DEVICE "/dev/tun0"
} device_type_t;
int device_fd = -1;
- char *device;
- char *iface;
- char *device_info;
+ char *device = NULL;
+ char *iface = NULL;
+ static char *device_info = NULL;
static int device_total_in = 0;
static int device_total_out = 0;
- #ifdef HAVE_OPENBSD
+ #if defined(HAVE_OPENBSD) || defined(HAVE_FREEBSD)
static device_type_t device_type = DEVICE_TYPE_TUNIFHEAD;
#else
static device_type_t device_type = DEVICE_TYPE_TUN;
cp();
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
- device = DEFAULT_DEVICE;
+ device = xstrdup(DEFAULT_DEVICE);
if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
- iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
+ iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device);
if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
return false;
}
} else {
- if(strstr(device, "tap"))
+ if(strstr(device, "tap") || routing_mode != RMODE_ROUTER)
device_type = DEVICE_TYPE_TAP;
}
cp();
close(device_fd);
+
+ free(device);
+ free(iface);
}
bool read_packet(vpn_packet_t *packet) {
- int lenin;
+ int inlen;
cp();
switch(device_type) {
case DEVICE_TYPE_TUN:
- if((lenin = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
+ if((inlen = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
return false;
}
- packet->len = lenin + 14;
+ packet->len = inlen + 14;
break;
case DEVICE_TYPE_TUNIFHEAD: {
u_int32_t type;
- struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data + 14, MTU - 14}};
+ struct iovec vector[2] = {{&type, sizeof type}, {packet->data + 14, MTU - 14}};
- if((lenin = readv(device_fd, vector, 2)) <= 0) {
+ if((inlen = readv(device_fd, vector, 2)) <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
return false;
}
- packet->len = lenin + 10;
+ packet->len = inlen + 10;
break;
}
case DEVICE_TYPE_TAP:
- if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
+ if((inlen = read(device_fd, packet->data, MTU)) <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
}
- packet->len = lenin;
+ packet->len = inlen;
break;
default:
return true;
}
-bool write_packet(vpn_packet_t *packet)
-{
+bool write_packet(vpn_packet_t *packet) {
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
case DEVICE_TYPE_TUNIFHEAD: {
u_int32_t type;
- struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data + 14, packet->len - 14}};
+ struct iovec vector[2] = {{&type, sizeof type}, {packet->data + 14, packet->len - 14}};
int af;
af = (packet->data[12] << 8) + packet->data[13];
return true;
}
-void dump_device_stats(void)
-{
+void dump_device_stats(void) {
cp();
logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
conf.c -- configuration code
Copyright (C) 1998 Robert van der Meulen
1998-2005 Ivo Timmermans
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
2000 Cris van Pelt
This program is free software; you can redistribute it and/or modify
#include "system.h"
-#include "avl_tree.h"
+#include "splay_tree.h"
#include "conf.h"
#include "logger.h"
#include "netutl.h" /* for str2address */
#include "utils.h" /* for cp */
#include "xalloc.h"
-avl_tree_t *config_tree;
+splay_tree_t *config_tree;
int pinginterval = 0; /* seconds between pings */
int pingtimeout = 0; /* seconds to wait for response */
char *confbase = NULL; /* directory in which all config files are */
char *netname = NULL; /* name of the vpn network */
-static int config_compare(const config_t *a, const config_t *b)
-{
+static int config_compare(const config_t *a, const config_t *b) {
int result;
result = strcasecmp(a->variable, b->variable);
return strcmp(a->file, b->file);
}
-void init_configuration(avl_tree_t ** config_tree)
-{
+void init_configuration(splay_tree_t ** config_tree) {
cp();
- *config_tree = avl_alloc_tree((avl_compare_t) config_compare, (avl_action_t) free_config);
+ *config_tree = splay_alloc_tree((splay_compare_t) config_compare, (splay_action_t) free_config);
}
-void exit_configuration(avl_tree_t ** config_tree)
-{
+void exit_configuration(splay_tree_t ** config_tree) {
cp();
- avl_delete_tree(*config_tree);
+ splay_delete_tree(*config_tree);
*config_tree = NULL;
}
-config_t *new_config(void)
-{
+config_t *new_config(void) {
cp();
return xmalloc_and_zero(sizeof(config_t));
}
-void free_config(config_t *cfg)
-{
+void free_config(config_t *cfg) {
cp();
if(cfg->variable)
free(cfg);
}
-void config_add(avl_tree_t *config_tree, config_t *cfg)
-{
+void config_add(splay_tree_t *config_tree, config_t *cfg) {
cp();
- avl_insert(config_tree, cfg);
+ splay_insert(config_tree, cfg);
}
-config_t *lookup_config(avl_tree_t *config_tree, char *variable)
-{
+config_t *lookup_config(splay_tree_t *config_tree, char *variable) {
config_t cfg, *found;
cp();
cfg.file = "";
cfg.line = 0;
- found = avl_search_closest_greater(config_tree, &cfg);
+ found = splay_search_closest_greater(config_tree, &cfg);
if(!found)
return NULL;
return found;
}
-config_t *lookup_config_next(avl_tree_t *config_tree, const config_t *cfg)
-{
- avl_node_t *node;
+config_t *lookup_config_next(splay_tree_t *config_tree, const config_t *cfg) {
+ splay_node_t *node;
config_t *found;
cp();
- node = avl_search_node(config_tree, cfg);
+ node = splay_search_node(config_tree, cfg);
if(node) {
if(node->next) {
return NULL;
}
-bool get_config_bool(const config_t *cfg, bool *result)
-{
+bool get_config_bool(const config_t *cfg, bool *result) {
cp();
if(!cfg)
return false;
}
-bool get_config_int(const config_t *cfg, int *result)
-{
+bool get_config_int(const config_t *cfg, int *result) {
cp();
if(!cfg)
return false;
}
-bool get_config_string(const config_t *cfg, char **result)
-{
+bool get_config_string(const config_t *cfg, char **result) {
cp();
if(!cfg)
return true;
}
-bool get_config_address(const config_t *cfg, struct addrinfo **result)
-{
+bool get_config_address(const config_t *cfg, struct addrinfo **result) {
struct addrinfo *ai;
cp();
return false;
}
-bool get_config_subnet(const config_t *cfg, subnet_t ** result)
-{
+bool get_config_subnet(const config_t *cfg, subnet_t ** result) {
subnet_t subnet = {0};
cp();
/* Teach newbies what subnets are... */
if(((subnet.type == SUBNET_IPV4)
- && !maskcheck(&subnet.net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof(ipv4_t)))
+ && !maskcheck(&subnet.net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof subnet.net.ipv4.address))
|| ((subnet.type == SUBNET_IPV6)
- && !maskcheck(&subnet.net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof(ipv6_t)))) {
+ && !maskcheck(&subnet.net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof subnet.net.ipv6.address))) {
logger(LOG_ERR, _ ("Network address and prefix length do not match for configuration variable %s in %s line %d"),
cfg->variable, cfg->file, cfg->line);
return false;
given, and buf needs to be expanded, the var pointed to by buflen
will be increased.
*/
-static char *readline(FILE * fp, char **buf, size_t *buflen)
-{
+static char *readline(FILE * fp, char **buf, size_t *buflen) {
char *newline = NULL;
char *p;
char *line; /* The array that contains everything that has been read so far */
size = newsize;
} else {
*newline = '\0'; /* kill newline */
+ if(newline > p && newline[-1] == '\r') /* and carriage return if necessary */
+ newline[-1] = '\0';
break; /* yay */
}
}
Parse a configuration file and put the results in the configuration tree
starting at *base.
*/
-int read_config_file(avl_tree_t *config_tree, const char *fname)
-{
+int read_config_file(splay_tree_t *config_tree, const char *fname) {
int err = -2; /* Parse error */
FILE *fp;
char *buffer, *line;
return err;
}
-bool read_server_config()
-{
+bool read_server_config() {
char *fname;
int x;
return x == 0;
}
-
-FILE *ask_and_open(const char *filename, const char *what)
-{
- FILE *r;
- char *directory;
- char *fn;
-
- /* Check stdin and stdout */
- if(!isatty(0) || !isatty(1)) {
- /* Argh, they are running us from a script or something. Write
- the files to the current directory and let them burn in hell
- for ever. */
- fn = xstrdup(filename);
- } else {
- /* Ask for a file and/or directory name. */
- fprintf(stdout, _("Please enter a file to save %s to [%s]: "),
- what, filename);
- fflush(stdout);
-
- fn = readline(stdin, NULL, NULL);
-
- if(!fn) {
- fprintf(stderr, _("Error while reading stdin: %s\n"),
- strerror(errno));
- return NULL;
- }
-
- if(!strlen(fn))
- /* User just pressed enter. */
- fn = xstrdup(filename);
- }
-
-#ifdef HAVE_MINGW
- if(fn[0] != '\\' && fn[0] != '/' && !strchr(fn, ':')) {
-#else
- if(fn[0] != '/') {
-#endif
- /* The directory is a relative path or a filename. */
- char *p;
-
- directory = get_current_dir_name();
- asprintf(&p, "%s/%s", directory, fn);
- free(fn);
- free(directory);
- fn = p;
- }
-
- umask(0077); /* Disallow everything for group and other */
-
- /* Open it first to keep the inode busy */
-
- r = fopen(fn, "r+") ?: fopen(fn, "w+");
-
- if(!r) {
- fprintf(stderr, _("Error opening file `%s': %s\n"),
- fn, strerror(errno));
- free(fn);
- return NULL;
- }
-
- free(fn);
-
- return r;
-}
-
-bool disable_old_keys(FILE *f) {
- char buf[100];
- long pos;
- bool disabled = false;
-
- rewind(f);
- pos = ftell(f);
-
- while(fgets(buf, sizeof buf, f)) {
- if(!strncmp(buf, "-----BEGIN RSA", 14)) {
- buf[11] = 'O';
- buf[12] = 'L';
- buf[13] = 'D';
- fseek(f, pos, SEEK_SET);
- fputs(buf, f);
- disabled = true;
- }
- else if(!strncmp(buf, "-----END RSA", 12)) {
- buf[ 9] = 'O';
- buf[10] = 'L';
- buf[11] = 'D';
- fseek(f, pos, SEEK_SET);
- fputs(buf, f);
- disabled = true;
- }
- pos = ftell(f);
- }
-
- return disabled;
-}
/*
conf.h -- header for conf.c
Copyright (C) 1998-2005 Ivo Timmermans
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#ifndef __TINC_CONF_H__
#define __TINC_CONF_H__
-#include "avl_tree.h"
+#include "splay_tree.h"
typedef struct config_t {
char *variable;
#include "subnet.h"
-extern avl_tree_t *config_tree;
+extern splay_tree_t *config_tree;
extern int pinginterval;
extern int pingtimeout;
extern char *confbase;
extern char *netname;
-extern void init_configuration(avl_tree_t **);
-extern void exit_configuration(avl_tree_t **);
+extern void init_configuration(splay_tree_t **);
+extern void exit_configuration(splay_tree_t **);
extern config_t *new_config(void) __attribute__ ((__malloc__));
extern void free_config(config_t *);
-extern void config_add(avl_tree_t *, config_t *);
-extern config_t *lookup_config(avl_tree_t *, char *);
-extern config_t *lookup_config_next(avl_tree_t *, const config_t *);
+extern void config_add(splay_tree_t *, config_t *);
+extern config_t *lookup_config(splay_tree_t *, char *);
+extern config_t *lookup_config_next(splay_tree_t *, const config_t *);
extern bool get_config_bool(const config_t *, bool *);
extern bool get_config_int(const config_t *, int *);
extern bool get_config_string(const config_t *, char **);
extern bool get_config_address(const config_t *, struct addrinfo **);
extern bool get_config_subnet(const config_t *, struct subnet_t **);
-extern int read_config_file(avl_tree_t *, const char *);
+extern int read_config_file(splay_tree_t *, const char *);
extern bool read_server_config(void);
-extern FILE *ask_and_open(const char *, const char *);
+extern FILE *ask_and_open(const char *, const char *, const char *);
extern bool is_safe_path(const char *);
+ extern bool disable_old_keys(FILE *);
#endif /* __TINC_CONF_H__ */
#include "system.h"
-#include "avl_tree.h"
+#include "splay_tree.h"
+#include "cipher.h"
#include "conf.h"
#include "list.h"
#include "logger.h"
#include "utils.h"
#include "xalloc.h"
-avl_tree_t *connection_tree; /* Meta connections */
+splay_tree_t *connection_tree; /* Meta connections */
connection_t *broadcast;
-static int connection_compare(const connection_t *a, const connection_t *b)
-{
+static int connection_compare(const connection_t *a, const connection_t *b) {
return (void *)a - (void *)b;
}
-void init_connections(void)
-{
+void init_connections(void) {
cp();
- connection_tree = avl_alloc_tree((avl_compare_t) connection_compare, (avl_action_t) free_connection);
+ connection_tree = splay_alloc_tree((splay_compare_t) connection_compare, (splay_action_t) free_connection);
broadcast = new_connection();
broadcast->name = xstrdup(_("everyone"));
broadcast->hostname = xstrdup(_("BROADCAST"));
}
-void exit_connections(void)
-{
+void exit_connections(void) {
cp();
- avl_delete_tree(connection_tree);
+ splay_delete_tree(connection_tree);
free_connection(broadcast);
}
-connection_t *new_connection(void)
-{
- connection_t *c;
-
+connection_t *new_connection(void) {
cp();
- c = xmalloc_and_zero(sizeof(connection_t));
-
- if(!c)
- return NULL;
-
- gettimeofday(&c->start, NULL);
-
- return c;
+ return xmalloc_and_zero(sizeof(connection_t));
}
-void free_connection(connection_t *c)
-{
+void free_connection(connection_t *c) {
cp();
+ if(!c)
+ return;
+
if(c->name)
free(c->name);
if(c->hostname)
free(c->hostname);
- if(c->inkey)
- free(c->inkey);
-
- if(c->outkey)
- free(c->outkey);
-
- if(c->inctx) {
- EVP_CIPHER_CTX_cleanup(c->inctx);
- free(c->inctx);
- }
-
- if(c->outctx) {
- EVP_CIPHER_CTX_cleanup(c->outctx);
- free(c->outctx);
- }
-
- if(c->mychallenge)
- free(c->mychallenge);
+ cipher_close(&c->incipher);
+ cipher_close(&c->outcipher);
if(c->hischallenge)
free(c->hischallenge);
- if(c->outbuf)
- free(c->outbuf);
-
- if(c->rsa_key)
- RSA_free(c->rsa_key);
+ if(c->config_tree)
+ exit_configuration(&c->config_tree);
+
+ if(c->buffer)
+ bufferevent_free(c->buffer);
+
+ if(event_initialized(&c->inevent))
+ event_del(&c->inevent);
free(c);
}
-void connection_add(connection_t *c)
-{
+void connection_add(connection_t *c) {
cp();
- avl_insert(connection_tree, c);
+ splay_insert(connection_tree, c);
}
-void connection_del(connection_t *c)
-{
+void connection_del(connection_t *c) {
cp();
- avl_delete(connection_tree, c);
+ splay_delete(connection_tree, c);
}
-void dump_connections(void)
-{
- avl_node_t *node;
+int dump_connections(struct evbuffer *out) {
+ splay_node_t *node;
connection_t *c;
cp();
- logger(LOG_DEBUG, _("Connections:"));
-
for(node = connection_tree->head; node; node = node->next) {
c = node->data;
- logger(LOG_DEBUG, _(" %s at %s options %lx socket %d status %04x outbuf %d/%d/%d"),
- c->name, c->hostname, c->options, c->socket, c->status.value,
- c->outbufsize, c->outbufstart, c->outbuflen);
+ if(evbuffer_add_printf(out,
- _(" %s at %s options %lx socket %d status %04x\n"),
- c->name, c->hostname, c->options, c->socket,
- c->status.value) == -1)
++ _(" %s at %s options %lx socket %d status %04x\n"),
++ c->name, c->hostname, c->options, c->socket,
++ c->status.value) == -1)
+ return errno;
}
- logger(LOG_DEBUG, _("End of connections."));
+ return 0;
}
-bool read_connection_config(connection_t *c)
-{
+bool read_connection_config(connection_t *c) {
char *fname;
int x;
/*
device.c -- Interaction with Windows tap driver in a Cygwin environment
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
static HANDLE device_handle = INVALID_HANDLE_VALUE;
char *device = NULL;
char *iface = NULL;
- char *device_info = NULL;
+ static char *device_info = NULL;
static int device_total_in = 0;
static int device_total_out = 0;
static pid_t reader_pid;
static int sp[2];
-bool setup_device(void)
-{
+bool setup_device(void) {
HKEY key, key2;
int i, err;
}
for (i = 0; ; i++) {
- len = sizeof(adapterid);
+ len = sizeof adapterid;
if(RegEnumKeyEx(key, i, adapterid, &len, 0, 0, 0, NULL))
break;
/* Find out more about this adapter */
- snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid);
+ snprintf(regpath, sizeof regpath, "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid);
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2))
continue;
- len = sizeof(adaptername);
+ len = sizeof adaptername;
err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len);
RegCloseKey(key2);
continue;
}
- snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
+ snprintf(tapname, sizeof tapname, USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0);
if(device_handle != INVALID_HANDLE_VALUE) {
CloseHandle(device_handle);
if(!iface)
iface = xstrdup(adaptername);
- snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device);
+ snprintf(tapname, sizeof tapname, USERMODEDEVICEDIR "%s" TAPSUFFIX, device);
/* Now we are going to open this device twice: once for reading and once for writing.
We do this because apparently it isn't possible to check for activity in the select() loop.
/* Get MAC address from tap device */
- if(!DeviceIoControl(device_handle, TAP_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0)) {
+ if(!DeviceIoControl(device_handle, TAP_IOCTL_GET_MAC, mymac.x, sizeof mymac.x, mymac.x, sizeof mymac.x, &len, 0)) {
logger(LOG_ERR, _("Could not get MAC address from Windows tap device %s (%s): %s"), device, iface, winerror(GetLastError()));
return false;
}
It passes everything it reads to the socket. */
char buf[MTU];
- long lenin;
+ long inlen;
CloseHandle(device_handle);
/* Pass packets */
for(;;) {
- ReadFile(device_handle, buf, MTU, &lenin, NULL);
- write(sp[1], buf, lenin);
+ ReadFile(device_handle, buf, MTU, &inlen, NULL);
+ write(sp[1], buf, inlen);
}
}
return true;
}
-void close_device(void)
-{
+void close_device(void) {
cp();
close(sp[0]);
CloseHandle(device_handle);
kill(reader_pid, SIGKILL);
+
+ free(device);
+ free(iface);
}
-bool read_packet(vpn_packet_t *packet)
-{
- int lenin;
+bool read_packet(vpn_packet_t *packet) {
+ int inlen;
cp();
- if((lenin = read(sp[0], packet->data, MTU)) <= 0) {
+ if((inlen = read(sp[0], packet->data, MTU)) <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
}
- packet->len = lenin;
+ packet->len = inlen;
device_total_in += packet->len;
return true;
}
-bool write_packet(vpn_packet_t *packet)
-{
- long lenout;
+bool write_packet(vpn_packet_t *packet) {
+ long outlen;
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
packet->len, device_info);
- if(!WriteFile (device_handle, packet->data, packet->len, &lenout, NULL)) {
+ if(!WriteFile (device_handle, packet->data, packet->len, &outlen, NULL)) {
logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info, device, winerror(GetLastError()));
return false;
}
return true;
}
-void dump_device_stats(void)
-{
+void dump_device_stats(void) {
cp();
logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
/*
graph.c -- graph algorithms
- Copyright (C) 2001-2006 Guus Sliepen <guus@tinc-vpn.org>,
+ Copyright (C) 2001-2009 Guus Sliepen <guus@tinc-vpn.org>,
2001-2005 Ivo Timmermans
This program is free software; you can redistribute it and/or modify
#include "system.h"
-#include "avl_tree.h"
+#include "splay_tree.h"
#include "config.h"
#include "connection.h"
#include "device.h"
#include "subnet.h"
#include "utils.h"
-static bool graph_changed = true;
-
/* Implementation of Kruskal's algorithm.
- Running time: O(EN)
+ Running time: O(E)
Please note that sorting on weight is already done by add_edge().
*/
-void mst_kruskal(void)
-{
- avl_node_t *node, *next;
+void mst_kruskal(void) {
+ splay_node_t *node, *next;
edge_t *e;
node_t *n;
connection_t *c;
- int nodes = 0;
- int safe_edges = 0;
- bool skipped;
cp();
c->status.mst = false;
}
- /* Do we have something to do at all? */
-
- if(!edge_weight_tree->head)
- return;
-
ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Running Kruskal's algorithm:");
/* Clear visited status on nodes */
for(node = node_tree->head; node; node = node->next) {
n = node->data;
n->status.visited = false;
- nodes++;
- }
-
- /* Starting point */
-
- for(node = edge_weight_tree->head; node; node = node->next) {
- e = node->data;
- if(e->from->status.reachable) {
- e->from->status.visited = true;
- break;
- }
}
/* Add safe edges */
- for(skipped = false, node = edge_weight_tree->head; node; node = next) {
+ for(node = edge_weight_tree->head; node; node = next) {
next = node->next;
e = node->data;
- if(!e->reverse || e->from->status.visited == e->to->status.visited) {
- skipped = true;
+ if(!e->reverse || (e->from->status.visited && e->to->status.visited))
continue;
- }
e->from->status.visited = true;
e->to->status.visited = true;
if(e->reverse->connection)
e->reverse->connection->status.mst = true;
- safe_edges++;
-
ifdebug(SCARY_THINGS) logger(LOG_DEBUG, " Adding edge %s - %s weight %d", e->from->name,
e->to->name, e->weight);
+ }
+}
- if(skipped) {
- skipped = false;
- next = edge_weight_tree->head;
- continue;
+/* Implementation of Dijkstra's algorithm.
+ Running time: O(N^2)
+*/
+
+void sssp_dijkstra(void) {
+ splay_node_t *node, *to;
+ edge_t *e;
+ node_t *n, *m;
+ list_t *todo_list;
+ list_node_t *lnode, *nnode;
+ bool indirect;
+
+ cp();
+
+ todo_list = list_alloc(NULL);
+
+ ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Running Dijkstra's algorithm:");
+
+ /* Clear visited status on nodes */
+
+ for(node = node_tree->head; node; node = node->next) {
+ n = node->data;
+ n->status.visited = false;
+ n->status.indirect = true;
+ n->distance = -1;
+ }
+
+ /* Begin with myself */
+
+ myself->status.indirect = false;
+ myself->nexthop = myself;
+ myself->via = myself;
+ myself->distance = 0;
+ list_insert_head(todo_list, myself);
+
+ /* Loop while todo_list is filled */
+
+ while(todo_list->head) {
+ n = NULL;
+ nnode = NULL;
+
+ /* Select node from todo_list with smallest distance */
+
+ for(lnode = todo_list->head; lnode; lnode = lnode->next) {
+ m = lnode->data;
+ if(!n || m->status.indirect < n->status.indirect || m->distance < n->distance) {
+ n = m;
+ nnode = lnode;
+ }
+ }
+
+ /* Mark this node as visited and remove it from the todo_list */
+
+ n->status.visited = true;
+ list_unlink_node(todo_list, nnode);
+
+ /* Update distance of neighbours and add them to the todo_list */
+
+ for(to = n->edge_tree->head; to; to = to->next) { /* "to" is the edge connected to "from" */
+ e = to->data;
+
+ if(e->to->status.visited || !e->reverse)
+ continue;
+
+ /* Situation:
+
+ /
+ /
+ ----->(n)---e-->(e->to)
+ \
+ \
+
+ Where e is an edge, (n) and (e->to) are nodes.
+ n->address is set to the e->address of the edge left of n to n.
+ We are currently examining the edge e right of n from n:
+
+ - If e->reverse->address != n->address, then e->to is probably
+ not reachable for the nodes left of n. We do as if the indirectdata
+ flag is set on edge e.
+ - If edge e provides for better reachability of e->to, update e->to.
+ */
+
+ if(e->to->distance < 0)
+ list_insert_tail(todo_list, e->to);
+
+ indirect = n->status.indirect || e->options & OPTION_INDIRECT || ((n != myself) && sockaddrcmp(&n->address, &e->reverse->address));
+
+ if(e->to->distance >= 0 && (!e->to->status.indirect || indirect) && e->to->distance <= n->distance + e->weight)
+ continue;
+
+ e->to->distance = n->distance + e->weight;
+ e->to->status.indirect = indirect;
+ e->to->nexthop = (n->nexthop == myself) ? e->to : n->nexthop;
+ e->to->via = indirect ? n->via : e->to;
+ e->to->options = e->options;
+
+ if(sockaddrcmp(&e->to->address, &e->address)) {
+ node = splay_unlink(node_udp_tree, e->to);
+ sockaddrfree(&e->to->address);
+ sockaddrcpy(&e->to->address, &e->address);
+
+ if(e->to->hostname)
+ free(e->to->hostname);
+
+ e->to->hostname = sockaddr2hostname(&e->to->address);
+
+ if(node)
+ splay_insert_node(node_udp_tree, node);
+
+ if(e->to->options & OPTION_PMTU_DISCOVERY) {
+ e->to->mtuprobes = 0;
+ e->to->minmtu = 0;
+ e->to->maxmtu = MTU;
+ if(e->to->status.validkey)
+ send_mtu_probe(e->to);
+ }
+ }
+
+ ifdebug(SCARY_THINGS) logger(LOG_DEBUG, " Updating edge %s - %s weight %d distance %d", e->from->name,
+ e->to->name, e->weight, e->to->distance);
}
}
- ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Done, counted %d nodes and %d safe edges.", nodes,
- safe_edges);
+ list_free(todo_list);
}
/* Implementation of a simple breadth-first search algorithm.
Running time: O(E)
*/
-void sssp_bfs(void)
-{
- avl_node_t *node, *next, *to;
+void sssp_bfs(void) {
+ splay_node_t *node, *to;
edge_t *e;
node_t *n;
list_t *todo_list;
list_node_t *from, *todonext;
bool indirect;
- char *name;
- char *address, *port;
- char *envp[7];
- int i;
cp();
e->to->options = e->options;
if(sockaddrcmp(&e->to->address, &e->address)) {
- node = avl_unlink(node_udp_tree, e->to);
+ node = splay_unlink(node_udp_tree, e->to);
sockaddrfree(&e->to->address);
sockaddrcpy(&e->to->address, &e->address);
e->to->hostname = sockaddr2hostname(&e->to->address);
if(node)
- avl_insert_node(node_udp_tree, node);
+ splay_insert_node(node_udp_tree, node);
if(e->to->options & OPTION_PMTU_DISCOVERY) {
e->to->mtuprobes = 0;
}
list_free(todo_list);
+}
+
+void check_reachability() {
+ splay_node_t *node, *next;
+ node_t *n;
+ char *name;
+ char *address, *port;
+ char *envp[7];
+ int i;
/* Check reachability status. */
if(n->status.reachable) {
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Node %s (%s) became reachable"),
n->name, n->hostname);
- avl_insert(node_udp_tree, n);
+ splay_insert(node_udp_tree, n);
} else {
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Node %s (%s) became unreachable"),
n->name, n->hostname);
- avl_delete(node_udp_tree, n);
+ splay_delete(node_udp_tree, n);
}
n->status.validkey = false;
}
}
-void graph(void)
-{
- subnet_cache_flush();
- sssp_bfs();
- mst_kruskal();
- graph_changed = true;
-}
-
-
-
/* Dump nodes and edges to a graphviz file.
The file can be converted to an image with
dot -Tpng graph_filename -o image_filename.png -Gconcentrate=true
*/
-void dump_graph(void)
-{
- avl_node_t *node;
+int dump_graph(struct evbuffer *out) {
+ splay_node_t *node;
node_t *n;
edge_t *e;
- char *filename = NULL, *tmpname = NULL;
- FILE *file;
-
- if(!graph_changed || !get_config_string(lookup_config(config_tree, "GraphDumpFile"), &filename))
- return;
-
- graph_changed = false;
-
- ifdebug(PROTOCOL) logger(LOG_NOTICE, "Dumping graph");
-
- if(filename[0] == '|') {
- file = popen(filename + 1, "w");
- } else {
- asprintf(&tmpname, "%s.new", filename);
- file = fopen(tmpname, "w");
- }
- if(!file) {
- logger(LOG_ERR, "Unable to open graph dump file %s: %s", filename, strerror(errno));
- free(tmpname);
- return;
- }
-
- fprintf(file, "digraph {\n");
+ if(evbuffer_add_printf(out, "digraph {\n") == -1)
+ return errno;
/* dump all nodes first */
for(node = node_tree->head; node; node = node->next) {
n = node->data;
- fprintf(file, " %s [label = \"%s\"];\n", n->name, n->name);
+ if(evbuffer_add_printf(out, " %s [label = \"%s\"];\n",
+ n->name, n->name) == -1)
+ return errno;
}
/* now dump all edges */
for(node = edge_weight_tree->head; node; node = node->next) {
e = node->data;
- fprintf(file, " %s -> %s;\n", e->from->name, e->to->name);
+ if(evbuffer_add_printf(out, " %s -> %s;\n",
+ e->from->name, e->to->name) == -1)
+ return errno;
}
- fprintf(file, "}\n");
-
- if(filename[0] == '|') {
- pclose(file);
- } else {
- fclose(file);
-#ifdef HAVE_MINGW
- unlink(filename);
-#endif
- rename(tmpname, filename);
- free(tmpname);
- }
+ if(evbuffer_add_printf(out, "}\n") == -1)
+ return errno;
+
+ return 0;
+}
+
+void graph(void) {
++ subnet_cache_flush();
+ sssp_dijkstra();
+ check_reachability();
+ mst_kruskal();
}
/*
device.c -- Interaction with Linux ethertap and tun/tap device
Copyright (C) 2001-2005 Ivo Timmermans,
- 2001-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2001-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "net.h"
#include "route.h"
#include "utils.h"
+ #include "xalloc.h"
typedef enum device_type_t {
DEVICE_TYPE_ETHERTAP,
int device_fd = -1;
static device_type_t device_type;
- char *device;
- char *iface;
- char ifrname[IFNAMSIZ];
- char *device_info;
+ char *device = NULL;
+ char *iface = NULL;
+ static char ifrname[IFNAMSIZ];
+ static char *device_info;
static int device_total_in = 0;
static int device_total_out = 0;
-bool setup_device(void)
-{
+bool setup_device(void) {
struct ifreq ifr;
cp();
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
- device = DEFAULT_DEVICE;
+ device = xstrdup(DEFAULT_DEVICE);
if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
#ifdef HAVE_LINUX_IF_TUN_H
- iface = netname;
+ iface = xstrdup(netname);
#else
- iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
+ iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device);
#endif
device_fd = open(device, O_RDWR | O_NONBLOCK);
#ifdef HAVE_LINUX_IF_TUN_H
/* Ok now check if this is an old ethertap or a new tun/tap thingie */
- memset(&ifr, 0, sizeof(ifr));
+ memset(&ifr, 0, sizeof ifr);
if(routing_mode == RMODE_ROUTER) {
ifr.ifr_flags = IFF_TUN;
device_type = DEVICE_TYPE_TUN;
if(!ioctl(device_fd, TUNSETIFF, &ifr)) {
strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
- iface = ifrname;
+ if(iface) free(iface);
+ iface = xstrdup(ifrname);
} else if(!ioctl(device_fd, (('T' << 8) | 202), &ifr)) {
logger(LOG_WARNING, _("Old ioctl() request was needed for %s"), device);
strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
- iface = ifrname;
+ if(iface) free(iface);
+ iface = xstrdup(ifrname);
} else
#endif
{
overwrite_mac = true;
device_info = _("Linux ethertap device");
device_type = DEVICE_TYPE_ETHERTAP;
- iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
+ if(iface)
+ free(iface);
+ iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device);
}
logger(LOG_INFO, _("%s is a %s"), device, device_info);
return true;
}
-void close_device(void)
-{
+void close_device(void) {
cp();
close(device_fd);
+
+ free(device);
+ free(iface);
}
-bool read_packet(vpn_packet_t *packet)
-{
- int lenin;
+bool read_packet(vpn_packet_t *packet) {
+ int inlen;
cp();
switch(device_type) {
case DEVICE_TYPE_TUN:
- lenin = read(device_fd, packet->data + 10, MTU - 10);
+ inlen = read(device_fd, packet->data + 10, MTU - 10);
- if(lenin <= 0) {
+ if(inlen <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"),
device_info, device, strerror(errno));
return false;
}
- packet->len = lenin + 10;
+ packet->len = inlen + 10;
break;
case DEVICE_TYPE_TAP:
- lenin = read(device_fd, packet->data, MTU);
+ inlen = read(device_fd, packet->data, MTU);
- if(lenin <= 0) {
+ if(inlen <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"),
device_info, device, strerror(errno));
return false;
}
- packet->len = lenin;
+ packet->len = inlen;
break;
case DEVICE_TYPE_ETHERTAP:
- lenin = read(device_fd, packet->data - 2, MTU + 2);
+ inlen = read(device_fd, packet->data - 2, MTU + 2);
- if(lenin <= 0) {
+ if(inlen <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"),
device_info, device, strerror(errno));
return false;
}
- packet->len = lenin - 2;
+ packet->len = inlen - 2;
break;
}
return true;
}
-bool write_packet(vpn_packet_t *packet)
-{
+bool write_packet(vpn_packet_t *packet) {
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
return true;
}
-void dump_device_stats(void)
-{
+void dump_device_stats(void) {
cp();
logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
/*
device.c -- Interaction with Windows tap driver in a MinGW environment
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2007 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
static HANDLE device_handle = INVALID_HANDLE_VALUE;
char *device = NULL;
char *iface = NULL;
- char *device_info = NULL;
+ static char *device_info = NULL;
static int device_total_in = 0;
static int device_total_out = 0;
static int nbufs = 64;
- DWORD WINAPI tapreader(void *bla) {
+ static DWORD WINAPI tapreader(void *bla) {
int sock, err, status;
struct addrinfo *ai;
struct addrinfo hint = {
}
}
-bool setup_device(void)
-{
+bool setup_device(void) {
HKEY key, key2;
int i;
}
for (i = 0; ; i++) {
- len = sizeof(adapterid);
+ len = sizeof adapterid;
if(RegEnumKeyEx(key, i, adapterid, &len, 0, 0, 0, NULL))
break;
/* Find out more about this adapter */
- snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid);
+ snprintf(regpath, sizeof regpath, "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid);
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2))
continue;
- len = sizeof(adaptername);
+ len = sizeof adaptername;
err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len);
RegCloseKey(key2);
continue;
}
- snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
+ snprintf(tapname, sizeof tapname, USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
if(device_handle != INVALID_HANDLE_VALUE) {
found = true;
/* Try to open the corresponding tap device */
if(device_handle == INVALID_HANDLE_VALUE) {
- snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device);
+ snprintf(tapname, sizeof tapname, USERMODEDEVICEDIR "%s" TAPSUFFIX, device);
device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
}
/* Get MAC address from tap device */
- if(!DeviceIoControl(device_handle, TAP_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0)) {
+ if(!DeviceIoControl(device_handle, TAP_IOCTL_GET_MAC, mymac.x, sizeof mymac.x, mymac.x, sizeof mymac.x, &len, 0)) {
logger(LOG_ERR, _("Could not get MAC address from Windows tap device %s (%s): %s"), device, iface, winerror(GetLastError()));
return false;
}
/* Set media status for newer TAP-Win32 devices */
status = true;
- DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof(status), &status, sizeof(status), &len, NULL);
+ DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof status, &status, sizeof status, &len, NULL);
device_info = _("Windows tap device");
return true;
}
-void close_device(void)
-{
+void close_device(void) {
cp();
CloseHandle(device_handle);
+
+ free(device);
+ free(iface);
}
-bool read_packet(vpn_packet_t *packet)
-{
+bool read_packet(vpn_packet_t *packet) {
unsigned char bufno;
cp();
return true;
}
-bool write_packet(vpn_packet_t *packet)
-{
- long lenout;
+bool write_packet(vpn_packet_t *packet) {
+ long outlen;
OVERLAPPED overlapped = {0};
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
packet->len, device_info);
- if(!WriteFile(device_handle, packet->data, packet->len, &lenout, &overlapped)) {
+ if(!WriteFile(device_handle, packet->data, packet->len, &outlen, &overlapped)) {
logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info, device, winerror(GetLastError()));
return false;
}
return true;
}
-void dump_device_stats(void)
-{
+void dump_device_stats(void) {
cp();
logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
/*
net.c -- most of the network code
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <openssl/rand.h>
#include "utils.h"
-#include "avl_tree.h"
+#include "splay_tree.h"
#include "conf.h"
#include "connection.h"
#include "device.h"
-#include "event.h"
#include "graph.h"
#include "logger.h"
#include "meta.h"
#include "netutl.h"
#include "process.h"
#include "protocol.h"
-#include "route.h"
#include "subnet.h"
#include "xalloc.h"
-bool do_purge = false;
-volatile bool running = false;
-
-time_t now = 0;
-
/* Purge edges and subnets of unreachable nodes. Use carefully. */
-static void purge(void)
-{
- avl_node_t *nnode, *nnext, *enode, *enext, *snode, *snext;
+void purge(void) {
+ splay_node_t *nnode, *nnext, *enode, *enext, *snode, *snext;
node_t *n;
edge_t *e;
subnet_t *s;
}
}
-/*
- put all file descriptors in an fd_set array
- While we're at it, purge stuff that needs to be removed.
-*/
-static int build_fdset(fd_set *readset, fd_set *writeset)
-{
- avl_node_t *node, *next;
- connection_t *c;
- int i, max = 0;
-
- cp();
-
- FD_ZERO(readset);
- FD_ZERO(writeset);
-
- for(node = connection_tree->head; node; node = next) {
- next = node->next;
- c = node->data;
-
- if(c->status.remove) {
- connection_del(c);
- if(!connection_tree->head)
- purge();
- } else {
- FD_SET(c->socket, readset);
- if(c->outbuflen > 0)
- FD_SET(c->socket, writeset);
- if(c->socket > max)
- max = c->socket;
- }
- }
-
- for(i = 0; i < listen_sockets; i++) {
- FD_SET(listen_socket[i].tcp, readset);
- if(listen_socket[i].tcp > max)
- max = listen_socket[i].tcp;
- FD_SET(listen_socket[i].udp, readset);
- if(listen_socket[i].udp > max)
- max = listen_socket[i].udp;
- }
-
- FD_SET(device_fd, readset);
- if(device_fd > max)
- max = device_fd;
-
- return max;
-}
-
/*
Terminate a connection:
- Close the socket
- Check if we need to retry making an outgoing connection
- Deactivate the host
*/
-void terminate_connection(connection_t *c, bool report)
-{
+void terminate_connection(connection_t *c, bool report) {
cp();
- if(c->status.remove)
- return;
-
ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Closing connection with %s (%s)"),
c->name, c->hostname);
- c->status.remove = true;
c->status.active = false;
if(c->node)
/* Check if this was our outgoing connection */
- if(c->outgoing) {
+ if(c->outgoing)
retry_outgoing(c->outgoing);
- c->outgoing = NULL;
- }
- free(c->outbuf);
- c->outbuf = NULL;
- c->outbuflen = 0;
- c->outbufsize = 0;
- c->outbufstart = 0;
+ connection_del(c);
}
/*
end does not reply in time, we consider them dead
and close the connection.
*/
-static void check_dead_connections(void)
-{
- avl_node_t *node, *next;
+static void timeout_handler(int fd, short events, void *event) {
+ splay_node_t *node, *next;
connection_t *c;
+ time_t now = time(NULL);
cp();
if(c->status.pinged) {
ifdebug(CONNECTIONS) logger(LOG_INFO, _("%s (%s) didn't respond to PING in %ld seconds"),
c->name, c->hostname, now - c->last_ping_time);
- c->status.timeout = true;
terminate_connection(c, true);
+ continue;
} else if(c->last_ping_time + pinginterval < now) {
send_ping(c);
}
} else {
- if(c->status.remove) {
- logger(LOG_WARNING, _("Old connection_t for %s (%s) status %04x still lingering, deleting..."),
- c->name, c->hostname, c->status.value);
- connection_del(c);
- continue;
- }
- ifdebug(CONNECTIONS) logger(LOG_WARNING, _("Timeout from %s (%s) during authentication"),
- c->name, c->hostname);
if(c->status.connecting) {
+ ifdebug(CONNECTIONS)
+ logger(LOG_WARNING, _("Timeout while connecting to %s (%s)"), c->name, c->hostname);
c->status.connecting = false;
closesocket(c->socket);
do_outgoing_connection(c);
} else {
+ ifdebug(CONNECTIONS) logger(LOG_WARNING, _("Timeout from %s (%s) during authentication"), c->name, c->hostname);
terminate_connection(c, false);
+ continue;
}
}
}
+ }
- if(c->outbuflen > 0 && c->last_flushed_time + pingtimeout < now) {
- if(c->status.active) {
- ifdebug(CONNECTIONS) logger(LOG_INFO,
- _("%s (%s) could not flush for %ld seconds (%d bytes remaining)"),
- c->name, c->hostname, now - c->last_flushed_time, c->outbuflen);
- c->status.timeout = true;
- terminate_connection(c, true);
- }
+ event_add(event, &(struct timeval){pingtimeout, 0});
+}
+
+void handle_meta_connection_data(int fd, short events, void *data) {
+ connection_t *c = data;
+ int result;
+ socklen_t len = sizeof result;
+
+ if(c->status.connecting) {
+ c->status.connecting = false;
+
+ getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &result, &len);
+
+ if(!result)
+ finish_connecting(c);
+ else {
+ ifdebug(CONNECTIONS) logger(LOG_DEBUG,
+ _("Error while connecting to %s (%s): %s"),
+ c->name, c->hostname, strerror(result));
+ closesocket(c->socket);
+ do_outgoing_connection(c);
+ return;
}
}
+
+ if (!receive_meta(c)) {
+ terminate_connection(c, c->status.active);
+ return;
+ }
}
-/*
- check all connections to see if anything
- happened on their sockets
-*/
-static void check_network_activity(fd_set * readset, fd_set * writeset)
-{
+static void sigterm_handler(int signal, short events, void *data) {
+ logger(LOG_NOTICE, _("Got %s signal"), strsignal(signal));
+ event_loopexit(NULL);
+}
+
+static void sighup_handler(int signal, short events, void *data) {
+ logger(LOG_NOTICE, _("Got %s signal"), strsignal(signal));
+ reload_configuration();
+}
+
+int reload_configuration(void) {
connection_t *c;
- avl_node_t *node;
- int result, i;
- socklen_t len = sizeof(result);
- vpn_packet_t packet;
+ splay_node_t *node, *next;
+ char *fname;
+ struct stat s;
+ static time_t last_config_check = 0;
- cp();
+ /* Reread our own configuration file */
- /* check input from kernel */
- if(FD_ISSET(device_fd, readset)) {
- if(read_packet(&packet)) {
- packet.priority = 0;
- route(myself, &packet);
- }
+ exit_configuration(&config_tree);
+ init_configuration(&config_tree);
+
+ if(!read_server_config()) {
+ logger(LOG_ERR, _("Unable to reread configuration file, exitting."));
+ event_loopexit(NULL);
+ return EINVAL;
}
- /* check meta connections */
- for(node = connection_tree->head; node; node = node->next) {
+ /* Close connections to hosts that have a changed or deleted host config file */
+
+ for(node = connection_tree->head; node; node = next) {
c = node->data;
+ next = node->next;
+
+ if(c->outgoing) {
+ free(c->outgoing->name);
+ if(c->outgoing->ai)
+ freeaddrinfo(c->outgoing->ai);
+ free(c->outgoing);
+ c->outgoing = NULL;
+ }
+
+ asprintf(&fname, "%s/hosts/%s", confbase, c->name);
+ if(stat(fname, &s) || s.st_mtime > last_config_check)
+ terminate_connection(c, c->status.active);
+ free(fname);
+ }
- if(c->status.remove)
- continue;
+ last_config_check = time(NULL);
- if(FD_ISSET(c->socket, readset)) {
- if(c->status.connecting) {
- c->status.connecting = false;
- getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &result, &len);
+ /* Try to make outgoing connections */
+
+ try_outgoing_connections();
- if(!result)
- finish_connecting(c);
- else {
- ifdebug(CONNECTIONS) logger(LOG_DEBUG,
- _("Error while connecting to %s (%s): %s"),
- c->name, c->hostname, strerror(result));
- closesocket(c->socket);
- do_outgoing_connection(c);
- continue;
- }
- }
+ return 0;
+}
- if(!receive_meta(c)) {
- terminate_connection(c, c->status.active);
- continue;
- }
- }
+void retry(void) {
+ connection_t *c;
+ splay_node_t *node;
- if(FD_ISSET(c->socket, writeset)) {
- if(!flush_meta(c)) {
- terminate_connection(c, c->status.active);
- continue;
- }
+ for(node = connection_tree->head; node; node = node->next) {
+ c = node->data;
+
+ if(c->outgoing && !c->node) {
+ if(timeout_initialized(&c->outgoing->ev))
+ event_del(&c->outgoing->ev);
+ if(c->status.connecting)
+ close(c->socket);
+ c->outgoing->timeout = 0;
+ do_outgoing_connection(c);
}
}
-
- for(i = 0; i < listen_sockets; i++) {
- if(FD_ISSET(listen_socket[i].udp, readset))
- handle_incoming_vpn_data(listen_socket[i].udp);
-
- if(FD_ISSET(listen_socket[i].tcp, readset))
- handle_new_meta_connection(listen_socket[i].tcp);
- }
}
/*
this is where it all happens...
*/
-int main_loop(void)
-{
- fd_set readset, writeset;
- struct timeval tv;
- int r, maxfd;
- time_t last_ping_check, last_config_check, last_graph_dump;
- event_t *event;
+int main_loop(void) {
+ struct event timeout_event;
+ struct event sighup_event;
+ struct event sigterm_event;
+ struct event sigquit_event;
cp();
- last_ping_check = now;
- last_config_check = now;
- last_graph_dump = now;
-
- srand(now);
- srand48(now);
-
- running = true;
-
- while(running) {
- now = time(NULL);
-
- // tv.tv_sec = 1 + (rand() & 7); /* Approx. 5 seconds, randomized to prevent global synchronisation effects */
- tv.tv_sec = 1;
- tv.tv_usec = 0;
-
- maxfd = build_fdset(&readset, &writeset);
-
- r = select(maxfd + 1, &readset, &writeset, NULL, &tv);
-
- if(r < 0) {
- if(errno != EINTR && errno != EAGAIN) {
- logger(LOG_ERR, _("Error while waiting for input: %s"),
- strerror(errno));
- cp_trace();
- dump_connections();
- return 1;
- }
-
- continue;
- }
-
- check_network_activity(&readset, &writeset);
-
- if(do_purge) {
- purge();
- do_purge = false;
- }
-
- /* Let's check if everybody is still alive */
-
- if(last_ping_check + pingtimeout < now) {
- check_dead_connections();
- last_ping_check = now;
-
- if(routing_mode == RMODE_SWITCH)
- age_subnets();
-
- age_past_requests();
-
- /* Should we regenerate our key? */
-
- if(keyexpires < now) {
- ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key"));
-
- RAND_pseudo_bytes((unsigned char *)myself->key, myself->keylength);
- if(myself->cipher)
- EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, (unsigned char *)myself->key, (unsigned char *)myself->key + myself->cipher->key_len);
- send_key_changed(broadcast, myself);
- keyexpires = now + keylifetime;
- }
- }
-
- if(sigalrm) {
- logger(LOG_INFO, _("Flushing event queue"));
- expire_events();
- sigalrm = false;
- }
-
- while((event = get_expired_event())) {
- event->handler(event->data);
- free_event(event);
- }
-
- if(sighup) {
- connection_t *c;
- avl_node_t *node;
- char *fname;
- struct stat s;
-
- sighup = false;
-
- /* Reread our own configuration file */
-
- exit_configuration(&config_tree);
- init_configuration(&config_tree);
-
- if(!read_server_config()) {
- logger(LOG_ERR, _("Unable to reread configuration file, exitting."));
- return 1;
- }
-
- /* Close connections to hosts that have a changed or deleted host config file */
-
- for(node = connection_tree->head; node; node = node->next) {
- c = node->data;
-
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
- if(stat(fname, &s) || s.st_mtime > last_config_check)
- terminate_connection(c, c->status.active);
- free(fname);
- }
-
- last_config_check = now;
-
- /* Try to make outgoing connections */
-
- try_outgoing_connections();
- }
-
- /* Dump graph if wanted every 60 seconds*/
-
- if(last_graph_dump + 60 < now) {
- dump_graph();
- last_graph_dump = now;
- }
+ timeout_set(&timeout_event, timeout_handler, &timeout_event);
+ event_add(&timeout_event, &(struct timeval){pingtimeout, 0});
+ signal_set(&sighup_event, SIGHUP, sighup_handler, NULL);
+ signal_add(&sighup_event, NULL);
+ signal_set(&sigterm_event, SIGTERM, sigterm_handler, NULL);
+ signal_add(&sigterm_event, NULL);
+ signal_set(&sigquit_event, SIGQUIT, sigterm_handler, NULL);
+ signal_add(&sigquit_event, NULL);
+
+ if(event_loop(0) < 0) {
+ logger(LOG_ERR, _("Error while waiting for input: %s"), strerror(errno));
+ return 1;
}
+ signal_del(&sighup_event);
+ signal_del(&sigterm_event);
+ signal_del(&sigquit_event);
+ event_del(&timeout_event);
+
return 0;
}
/*
net.h -- header for net.c
Copyright (C) 1998-2005 Ivo Timmermans <zarq@iname.com>
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#ifndef __TINC_NET_H__
#define __TINC_NET_H__
-#include <openssl/evp.h>
-
#include "ipv6.h"
+#include "cipher.h"
+#include "digest.h"
#ifdef ENABLE_JUMBOGRAMS
#define MTU 9018 /* 9000 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
#define MTU 1518 /* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
#endif
-#define MAXSIZE (MTU + 4 + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + MTU/64 + 20) /* MTU + seqno + padding + HMAC + compressor overhead */
+#define MAXSIZE (MTU + 4 + CIPHER_MAX_BLOCK_SIZE + DIGEST_MAX_SIZE + MTU/64 + 20) /* MTU + seqno + padding + HMAC + compressor overhead */
#define MAXBUFSIZE ((MAXSIZE > 2048 ? MAXSIZE : 2048) + 128) /* Enough room for a request with a MAXSIZEd packet or a 8192 bits RSA key */
-#define MAXSOCKETS 128 /* Overkill... */
+#define MAXSOCKETS 8 /* Probably overkill... */
- #define MAXQUEUELENGTH 8 /* Maximum number of packats in a single queue */
-
typedef struct mac_t {
uint8_t x[6];
} mac_t;
uint8_t data[MAXSIZE];
} vpn_packet_t;
- typedef struct queue_element_t {
- void *packet;
- struct queue_element_t *prev;
- struct queue_element_t *next;
- } queue_element_t;
-
- typedef struct packet_queue_t {
- queue_element_t *head;
- queue_element_t *tail;
- } packet_queue_t;
-
typedef struct listen_socket_t {
+ struct event ev_tcp;
+ struct event ev_udp;
int tcp;
int udp;
sockaddr_t sa;
} listen_socket_t;
#include "conf.h"
+ #include "list.h"
typedef struct outgoing_t {
char *name;
struct config_t *cfg;
struct addrinfo *ai;
struct addrinfo *aip;
+ struct event ev;
} outgoing_t;
+ extern list_t *outgoing_list;
+
extern int maxoutbufsize;
extern int seconds_till_retry;
extern int addressfamily;
extern listen_socket_t listen_socket[MAXSOCKETS];
extern int listen_sockets;
-extern int keyexpires;
extern int keylifetime;
extern bool do_prune;
-extern bool do_purge;
extern char *myport;
-extern time_t now;
-extern EVP_CIPHER_CTX packet_ctx;
/* Yes, very strange placement indeed, but otherwise the typedefs get all tangled up */
#include "connection.h"
#include "node.h"
extern void retry_outgoing(outgoing_t *);
-extern void handle_incoming_vpn_data(int);
+extern void handle_incoming_vpn_data(int, short, void *);
extern void finish_connecting(struct connection_t *);
extern void do_outgoing_connection(struct connection_t *);
-extern bool handle_new_meta_connection(int);
+extern void handle_new_meta_connection(int, short, void *);
extern int setup_listen_socket(const sockaddr_t *);
extern int setup_vpn_in_socket(const sockaddr_t *);
extern void send_packet(const struct node_t *, vpn_packet_t *);
extern void flush_queue(struct node_t *);
extern bool read_rsa_public_key(struct connection_t *);
extern void send_mtu_probe(struct node_t *);
+extern void handle_device_data(int, short, void *);
+extern void handle_meta_connection_data(int, short, void *);
+extern void regenerate_key();
+extern void purge(void);
+extern void retry(void);
+extern int reload_configuration(void);
#ifndef HAVE_MINGW
#define closesocket(s) close(s)
/*
net_packet.c -- Handles in- and outgoing VPN packets
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "system.h"
-#include <openssl/rand.h>
-#include <openssl/err.h>
-#include <openssl/evp.h>
-#include <openssl/pem.h>
-#include <openssl/hmac.h>
-
#include <zlib.h>
#include LZO1X_H
-#include "avl_tree.h"
+#include "splay_tree.h"
+#include "cipher.h"
#include "conf.h"
#include "connection.h"
+#include "crypto.h"
+#include "digest.h"
#include "device.h"
#include "ethernet.h"
-#include "event.h"
#include "graph.h"
#include "list.h"
#include "logger.h"
#endif
int keylifetime = 0;
-int keyexpires = 0;
-EVP_CIPHER_CTX packet_ctx;
static char lzo_wrkmem[LZO1X_999_MEM_COMPRESS > LZO1X_1_MEM_COMPRESS ? LZO1X_999_MEM_COMPRESS : LZO1X_1_MEM_COMPRESS];
static void send_udppacket(node_t *, vpn_packet_t *);
#define MAX_SEQNO 1073741824
-void send_mtu_probe(node_t *n)
-{
+static void send_mtu_probe_handler(int fd, short events, void *data) {
+ node_t *n = data;
vpn_packet_t packet;
int len, i;
cp();
n->mtuprobes++;
- n->mtuevent = NULL;
if(n->mtuprobes >= 10 && !n->minmtu) {
ifdebug(TRAFFIC) logger(LOG_INFO, _("No response to MTU probes from %s (%s)"), n->name, n->hostname);
len = 64;
memset(packet.data, 0, 14);
- RAND_pseudo_bytes(packet.data + 14, len - 14);
+ randomize(packet.data + 14, len - 14);
packet.len = len;
+ packet.priority = 0;
ifdebug(TRAFFIC) logger(LOG_INFO, _("Sending MTU probe length %d to %s (%s)"), len, n->name, n->hostname);
send_udppacket(n, &packet);
}
- n->mtuevent = new_event();
- n->mtuevent->handler = (event_handler_t)send_mtu_probe;
- n->mtuevent->data = n;
- n->mtuevent->time = now + 1;
- event_add(n->mtuevent);
+ event_add(&n->mtuevent, &(struct timeval){1, 0});
+}
+
+void send_mtu_probe(node_t *n) {
+ if(!timeout_initialized(&n->mtuevent))
+ timeout_set(&n->mtuevent, send_mtu_probe_handler, n);
+ send_mtu_probe_handler(0, 0, n);
}
void mtu_probe_h(node_t *n, vpn_packet_t *packet) {
}
}
-static length_t compress_packet(uint8_t *dest, const uint8_t *source, length_t len, int level)
-{
+static length_t compress_packet(uint8_t *dest, const uint8_t *source, length_t len, int level) {
if(level == 10) {
lzo_uint lzolen = MAXSIZE;
lzo1x_1_compress(source, len, dest, &lzolen, lzo_wrkmem);
return -1;
}
-static length_t uncompress_packet(uint8_t *dest, const uint8_t *source, length_t len, int level)
-{
+static length_t uncompress_packet(uint8_t *dest, const uint8_t *source, length_t len, int level) {
if(level > 9) {
lzo_uint lzolen = MAXSIZE;
if(lzo1x_decompress_safe(source, len, dest, &lzolen, NULL) == LZO_E_OK)
/* VPN packet I/O */
-static void receive_packet(node_t *n, vpn_packet_t *packet)
-{
+static void receive_packet(node_t *n, vpn_packet_t *packet) {
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Received packet of %d bytes from %s (%s)"),
route(n, packet);
}
-static void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
-{
+static void receive_udppacket(node_t *n, vpn_packet_t *inpkt) {
vpn_packet_t pkt1, pkt2;
vpn_packet_t *pkt[] = { &pkt1, &pkt2, &pkt1, &pkt2 };
int nextpkt = 0;
vpn_packet_t *outpkt = pkt[0];
- int outlen, outpad;
- unsigned char hmac[EVP_MAX_MD_SIZE];
+ size_t outlen;
int i;
cp();
/* Check packet length */
- if(inpkt->len < sizeof(inpkt->seqno) + myself->maclength) {
+ if(inpkt->len < sizeof inpkt->seqno + digest_length(&myself->digest)) {
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Got too short packet from %s (%s)"),
n->name, n->hostname);
return;
/* Check the message authentication code */
- if(myself->digest && myself->maclength) {
- inpkt->len -= myself->maclength;
- HMAC(myself->digest, myself->key, myself->keylength,
- (unsigned char *) &inpkt->seqno, inpkt->len, (unsigned char *)hmac, NULL);
-
- if(memcmp(hmac, (char *) &inpkt->seqno + inpkt->len, myself->maclength)) {
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Got unauthenticated packet from %s (%s)"),
- n->name, n->hostname);
- return;
- }
+ if(digest_active(&myself->digest) && !digest_verify(&myself->digest, &inpkt->seqno, inpkt->len, &inpkt->seqno + inpkt->len)) {
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Got unauthenticated packet from %s (%s)"), n->name, n->hostname);
+ return;
}
/* Decrypt the packet */
- if(myself->cipher) {
+ if(cipher_active(&myself->cipher)) {
outpkt = pkt[nextpkt++];
+ outlen = MAXSIZE;
- if(!EVP_DecryptInit_ex(&packet_ctx, NULL, NULL, NULL, NULL)
- || !EVP_DecryptUpdate(&packet_ctx, (unsigned char *) &outpkt->seqno, &outlen,
- (unsigned char *) &inpkt->seqno, inpkt->len)
- || !EVP_DecryptFinal_ex(&packet_ctx, (unsigned char *) &outpkt->seqno + outlen, &outpad)) {
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Error decrypting packet from %s (%s): %s"),
- n->name, n->hostname, ERR_error_string(ERR_get_error(), NULL));
+ if(!cipher_decrypt(&myself->cipher, &inpkt->seqno, inpkt->len, &outpkt->seqno, &outlen, true)) {
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Error decrypting packet from %s (%s)"), n->name, n->hostname);
return;
}
- outpkt->len = outlen + outpad;
+ outpkt->len = outlen;
inpkt = outpkt;
}
/* Check the sequence number */
- inpkt->len -= sizeof(inpkt->seqno);
+ inpkt->len -= sizeof inpkt->seqno;
inpkt->seqno = ntohl(inpkt->seqno);
if(inpkt->seqno != n->received_seqno + 1) {
- if(inpkt->seqno >= n->received_seqno + sizeof(n->late) * 8) {
+ if(inpkt->seqno >= n->received_seqno + sizeof n->late * 8) {
logger(LOG_WARNING, _("Lost %d packets from %s (%s)"),
inpkt->seqno - n->received_seqno - 1, n->name, n->hostname);
- memset(n->late, 0, sizeof(n->late));
+ memset(n->late, 0, sizeof n->late);
} else if (inpkt->seqno <= n->received_seqno) {
- if((n->received_seqno >= sizeof(n->late) * 8 && inpkt->seqno <= n->received_seqno - sizeof(n->late) * 8) || !(n->late[(inpkt->seqno / 8) % sizeof(n->late)] & (1 << inpkt->seqno % 8))) {
+ if((n->received_seqno >= sizeof n->late * 8 && inpkt->seqno <= n->received_seqno - sizeof n->late * 8) || !(n->late[(inpkt->seqno / 8) % sizeof n->late] & (1 << inpkt->seqno % 8))) {
logger(LOG_WARNING, _("Got late or replayed packet from %s (%s), seqno %d, last received %d"),
n->name, n->hostname, inpkt->seqno, n->received_seqno);
return;
}
} else {
for(i = n->received_seqno + 1; i < inpkt->seqno; i++)
- n->late[(i / 8) % sizeof(n->late)] |= 1 << i % 8;
+ n->late[(i / 8) % sizeof n->late] |= 1 << i % 8;
}
}
- n->late[(inpkt->seqno / 8) % sizeof(n->late)] &= ~(1 << inpkt->seqno % 8);
+ n->late[(inpkt->seqno / 8) % sizeof n->late] &= ~(1 << inpkt->seqno % 8);
if(inpkt->seqno > n->received_seqno)
n->received_seqno = inpkt->seqno;
if(n->received_seqno > MAX_SEQNO)
- keyexpires = 0;
+ regenerate_key();
/* Decompress the packet */
inpkt = outpkt;
}
- if(n->connection)
- n->connection->last_ping_time = now;
-
+ inpkt->priority = 0;
+
if(!inpkt->data[12] && !inpkt->data[13])
mtu_probe_h(n, inpkt);
else
receive_packet(n, inpkt);
}
-void receive_tcppacket(connection_t *c, char *buffer, int len)
-{
+void receive_tcppacket(connection_t *c, char *buffer, int len) {
vpn_packet_t outpkt;
cp();
outpkt.len = len;
+ if(c->options & OPTION_TCPONLY)
+ outpkt.priority = 0;
+ else
+ outpkt.priority = -1;
memcpy(outpkt.data, buffer, len);
receive_packet(c->node, &outpkt);
}
-static void send_udppacket(node_t *n, vpn_packet_t *origpkt)
-{
+static void send_udppacket(node_t *n, vpn_packet_t *origpkt) {
vpn_packet_t pkt1, pkt2;
vpn_packet_t *pkt[] = { &pkt1, &pkt2, &pkt1, &pkt2 };
vpn_packet_t *inpkt = origpkt;
int nextpkt = 0;
vpn_packet_t *outpkt;
int origlen;
- int outlen, outpad;
+ size_t outlen;
- vpn_packet_t *copy;
static int priority = 0;
int origpriority;
int sock;
if(!n->status.validkey) {
ifdebug(TRAFFIC) logger(LOG_INFO,
- _("No valid key known yet for %s (%s), queueing packet"),
+ _("No valid key known yet for %s (%s), forwarding via TCP"),
n->name, n->hostname);
- /* Since packet is on the stack of handle_tap_input(), we have to make a copy of it first. */
-
- *(copy = xmalloc(sizeof *copy)) = *inpkt;
-
- list_insert_tail(n->queue, copy);
-
- if(n->queue->count > MAXQUEUELENGTH)
- list_delete_head(n->queue);
-
if(!n->status.waitingforkey)
send_req_key(n->nexthop->connection, myself, n);
n->status.waitingforkey = true;
+ send_tcppacket(n->nexthop->connection, origpkt);
+
return;
}
+ if(!n->minmtu && (inpkt->data[12] | inpkt->data[13])) {
+ ifdebug(TRAFFIC) logger(LOG_INFO,
+ _("No minimum MTU established yet for %s (%s), forwarding via TCP"),
+ n->name, n->hostname);
+
+ send_tcppacket(n->nexthop->connection, origpkt);
+ }
+
origlen = inpkt->len;
origpriority = inpkt->priority;
/* Add sequence number */
inpkt->seqno = htonl(++(n->sent_seqno));
- inpkt->len += sizeof(inpkt->seqno);
+ inpkt->len += sizeof inpkt->seqno;
/* Encrypt the packet */
- if(n->cipher) {
+ if(cipher_active(&n->cipher)) {
outpkt = pkt[nextpkt++];
+ outlen = MAXSIZE;
- if(!EVP_EncryptInit_ex(&n->packet_ctx, NULL, NULL, NULL, NULL)
- || !EVP_EncryptUpdate(&n->packet_ctx, (unsigned char *) &outpkt->seqno, &outlen,
- (unsigned char *) &inpkt->seqno, inpkt->len)
- || !EVP_EncryptFinal_ex(&n->packet_ctx, (unsigned char *) &outpkt->seqno + outlen, &outpad)) {
- ifdebug(TRAFFIC) logger(LOG_ERR, _("Error while encrypting packet to %s (%s): %s"),
- n->name, n->hostname, ERR_error_string(ERR_get_error(), NULL));
+ if(!cipher_encrypt(&n->cipher, &inpkt->seqno, inpkt->len, &outpkt->seqno, &outlen, true)) {
+ ifdebug(TRAFFIC) logger(LOG_ERR, _("Error while encrypting packet to %s (%s)"), n->name, n->hostname);
goto end;
}
- outpkt->len = outlen + outpad;
+ outpkt->len = outlen;
inpkt = outpkt;
}
/* Add the message authentication code */
- if(n->digest && n->maclength) {
- HMAC(n->digest, n->key, n->keylength, (unsigned char *) &inpkt->seqno,
- inpkt->len, (unsigned char *) &inpkt->seqno + inpkt->len, NULL);
- inpkt->len += n->maclength;
+ if(digest_active(&n->digest)) {
+ digest_create(&n->digest, &inpkt->seqno, inpkt->len, &inpkt->seqno + inpkt->len);
+ inpkt->len += digest_length(&n->digest);
}
/* Determine which socket we have to use */
&& listen_socket[sock].sa.sa.sa_family == AF_INET) {
priority = origpriority;
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Setting outgoing packet priority to %d"), priority);
- if(setsockopt(listen_socket[sock].udp, SOL_IP, IP_TOS, &priority, sizeof(priority))) /* SO_PRIORITY doesn't seem to work */
+ if(setsockopt(listen_socket[sock].udp, SOL_IP, IP_TOS, &priority, sizeof priority)) /* SO_PRIORITY doesn't seem to work */
logger(LOG_ERR, _("System call `%s' failed: %s"), "setsockopt", strerror(errno));
}
#endif
/*
send a packet to the given vpn ip.
*/
-void send_packet(const node_t *n, vpn_packet_t *packet)
-{
+void send_packet(const node_t *n, vpn_packet_t *packet) {
node_t *via;
cp();
return;
}
- via = (n->via == myself) ? n->nexthop : n->via;
+ via = (packet->priority == -1 || n->via == myself) ? n->nexthop : n->via;
if(via != n)
- ifdebug(TRAFFIC) logger(LOG_ERR, _("Sending packet to %s via %s (%s)"),
+ ifdebug(TRAFFIC) logger(LOG_INFO, _("Sending packet to %s via %s (%s)"),
n->name, via->name, n->via->hostname);
- if((myself->options | via->options) & OPTION_TCPONLY) {
+ if(packet->priority == -1 || ((myself->options | via->options) & OPTION_TCPONLY)) {
if(!send_tcppacket(via->connection, packet))
terminate_connection(via->connection, true);
} else
/* Broadcast a packet using the minimum spanning tree */
-void broadcast_packet(const node_t *from, vpn_packet_t *packet)
-{
- avl_node_t *node;
+void broadcast_packet(const node_t *from, vpn_packet_t *packet) {
+ splay_node_t *node;
connection_t *c;
cp();
}
}
- void flush_queue(node_t *n) {
- list_node_t *node, *next;
-
- cp();
-
- ifdebug(TRAFFIC) logger(LOG_INFO, _("Flushing queue for %s (%s)"), n->name, n->hostname);
-
- for(node = n->queue->head; node; node = next) {
- next = node->next;
- send_udppacket(n, node->data);
- list_delete_node(n->queue, node);
- }
- }
-
- void handle_incoming_vpn_data(int sock, short events, void *data) {
-void handle_incoming_vpn_data(int sock)
++void handle_incoming_vpn_data(int sock, short events, void *data)
+ {
vpn_packet_t pkt;
char *hostname;
sockaddr_t from;
- socklen_t fromlen = sizeof(from);
+ socklen_t fromlen = sizeof from;
node_t *n;
cp();
receive_udppacket(n, &pkt);
}
+
+void handle_device_data(int sock, short events, void *data) {
+ vpn_packet_t packet;
+
+ if(read_packet(&packet))
+ route(myself, &packet);
+}
/*
net_setup.c -- Setup.
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "system.h"
-#include <openssl/pem.h>
-#include <openssl/rsa.h>
-#include <openssl/rand.h>
-#include <openssl/err.h>
-#include <openssl/evp.h>
-
-#include "avl_tree.h"
+#include "splay_tree.h"
+#include "cipher.h"
#include "conf.h"
#include "connection.h"
+#include "control.h"
#include "device.h"
-#include "event.h"
+#include "digest.h"
#include "graph.h"
#include "logger.h"
#include "net.h"
#include "process.h"
#include "protocol.h"
#include "route.h"
+#include "rsa.h"
#include "subnet.h"
#include "utils.h"
#include "xalloc.h"
char *myport;
+static struct event device_ev;
-bool read_rsa_public_key(connection_t *c)
-{
+bool read_rsa_public_key(connection_t *c) {
FILE *fp;
char *fname;
- char *key;
+ char *n;
+ bool result;
cp();
- if(!c->rsa_key) {
- c->rsa_key = RSA_new();
-// RSA_blinding_on(c->rsa_key, NULL);
- }
-
/* First, check for simple PublicKey statement */
- if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &key)) {
- BN_hex2bn(&c->rsa_key->n, key);
- BN_hex2bn(&c->rsa_key->e, "FFFF");
- free(key);
- return true;
+ if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &n)) {
+ result = rsa_set_hex_public_key(&c->rsa, n, "FFFF");
+ free(n);
+ return result;
}
/* Else, check for PublicKeyFile statement and read it */
- if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname)) {
- fp = fopen(fname, "r");
-
- if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
- return false;
- }
-
- free(fname);
- c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
-
- if(c->rsa_key)
- return true; /* Woohoo. */
-
- /* If it fails, try PEM_read_RSA_PUBKEY. */
- fp = fopen(fname, "r");
+ if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
+ asprintf(&fname, "%s/hosts/%s", confbase, c->name);
- if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
- fname, strerror(errno));
- free(fname);
- return false;
- }
-
- free(fname);
- c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
-
- if(c->rsa_key) {
-// RSA_blinding_on(c->rsa_key, NULL);
- return true;
- }
+ fp = fopen(fname, "r");
- logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
+ if(!fp) {
+ logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
fname, strerror(errno));
+ free(fname);
return false;
}
- /* Else, check if a harnessed public key is in the config file */
-
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
- fp = fopen(fname, "r");
-
- if(fp) {
- c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
- }
-
- free(fname);
-
- if(c->rsa_key)
- return true;
-
- /* Try again with PEM_read_RSA_PUBKEY. */
-
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
- fp = fopen(fname, "r");
-
- if(fp) {
- c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
-// RSA_blinding_on(c->rsa_key, NULL);
- fclose(fp);
- }
+ result = rsa_read_pem_public_key(&c->rsa, fp);
+ fclose(fp);
+ if(!result)
+ logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"), fname, strerror(errno));
free(fname);
-
- if(c->rsa_key)
- return true;
-
- logger(LOG_ERR, _("No public key for %s specified!"), c->name);
-
- return false;
+ return result;
}
-bool read_rsa_private_key(void)
-{
+bool read_rsa_private_key() {
FILE *fp;
- char *fname, *key, *pubkey;
- struct stat s;
+ char *fname;
+ char *n, *d;
+ bool result;
cp();
- if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
- if(!get_config_string(lookup_config(myself->connection->config_tree, "PublicKey"), &pubkey)) {
+ /* First, check for simple PrivateKey statement */
+
+ if(get_config_string(lookup_config(config_tree, "PrivateKey"), &d)) {
+ if(!get_config_string(lookup_config(myself->connection->config_tree, "PublicKey"), &n)) {
logger(LOG_ERR, _("PrivateKey used but no PublicKey found!"));
+ free(d);
return false;
}
- myself->connection->rsa_key = RSA_new();
-// RSA_blinding_on(myself->connection->rsa_key, NULL);
- BN_hex2bn(&myself->connection->rsa_key->d, key);
- BN_hex2bn(&myself->connection->rsa_key->n, pubkey);
- BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
- free(key);
- free(pubkey);
+ result = rsa_set_hex_private_key(&myself->connection->rsa, n, "FFFF", d);
+ free(n);
+ free(d);
return true;
}
+ /* Else, check for PrivateKeyFile statement and read it */
+
if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
asprintf(&fname, "%s/rsa_key.priv", confbase);
}
#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
+ struct stat s;
+
if(fstat(fileno(fp), &s)) {
- logger(LOG_ERR, _("Could not stat RSA private key file `%s': %s'"),
- fname, strerror(errno));
+ logger(LOG_ERR, _("Could not stat RSA private key file `%s': %s'"), fname, strerror(errno));
free(fname);
return false;
}
logger(LOG_WARNING, _("Warning: insecure file permissions for RSA private key file `%s'!"), fname);
#endif
- myself->connection->rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
+ result = rsa_read_pem_private_key(&myself->connection->rsa, fp);
fclose(fp);
- if(!myself->connection->rsa_key) {
- logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
- fname, strerror(errno));
- free(fname);
- return false;
+ if(!result)
+ logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"), fname, strerror(errno));
+ free(fname);
+ return result;
+}
+
+static struct event keyexpire_event;
+
+static void keyexpire_handler(int fd, short events, void *data) {
+ regenerate_key();
+}
+
+void regenerate_key() {
+ ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key"));
+
+ if(!cipher_regenerate_key(&myself->cipher, true)) {
+ logger(LOG_ERR, _("Error regenerating key!"));
+ abort();
}
- free(fname);
- return true;
+ if(timeout_initialized(&keyexpire_event)) {
+ event_del(&keyexpire_event);
+ send_key_changed(broadcast, myself);
+ } else {
+ timeout_set(&keyexpire_event, keyexpire_handler, NULL);
+ }
+
+ event_add(&keyexpire_event, &(struct timeval){keylifetime, 0});
}
/*
Configure node_t myself and set up the local sockets (listen only)
*/
-bool setup_myself(void)
-{
+bool setup_myself(void) {
config_t *cfg;
subnet_t *subnet;
char *name, *hostname, *mode, *afname, *cipher, *digest;
if(get_config_bool(lookup_config(myself->connection->config_tree, "TCPOnly"), &choice) && choice)
myself->options |= OPTION_TCPONLY;
- if(get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) && choice)
- myself->options |= OPTION_PMTU_DISCOVERY;
-
if(myself->options & OPTION_TCPONLY)
myself->options |= OPTION_INDIRECT;
} else
routing_mode = RMODE_ROUTER;
+ if(routing_mode == RMODE_ROUTER)
+ if(!get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) || choice)
+ myself->options |= OPTION_PMTU_DISCOVERY;
+
get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
#if !defined(SOL_IP) || !defined(IP_TOS)
/* Generate packet encryption key */
- if(get_config_string
- (lookup_config(myself->connection->config_tree, "Cipher"), &cipher)) {
- if(!strcasecmp(cipher, "none")) {
- myself->cipher = NULL;
- } else {
- myself->cipher = EVP_get_cipherbyname(cipher);
-
- if(!myself->cipher) {
- logger(LOG_ERR, _("Unrecognized cipher type!"));
- return false;
- }
- }
- } else
- myself->cipher = EVP_bf_cbc();
-
- if(myself->cipher)
- myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
- else
- myself->keylength = 1;
+ if(!get_config_string(lookup_config(myself->connection->config_tree, "Cipher"), &cipher))
+ cipher = xstrdup("blowfish");
- myself->connection->outcipher = EVP_bf_ofb();
-
- myself->key = xmalloc(myself->keylength);
- RAND_pseudo_bytes((unsigned char *)myself->key, myself->keylength);
+ if(!cipher_open_by_name(&myself->cipher, cipher)) {
+ logger(LOG_ERR, _("Unrecognized cipher type!"));
+ return false;
+ }
if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
keylifetime = 3600;
- keyexpires = now + keylifetime;
-
- if(myself->cipher) {
- EVP_CIPHER_CTX_init(&packet_ctx);
- if(!EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, (unsigned char *)myself->key, (unsigned char *)myself->key + myself->cipher->key_len)) {
- logger(LOG_ERR, _("Error during initialisation of cipher for %s (%s): %s"),
- myself->name, myself->hostname, ERR_error_string(ERR_get_error(), NULL));
- return false;
- }
+ regenerate_key();
+
+ /* Check if we want to use message authentication codes... */
+
+ if(!get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest))
+ digest = xstrdup("sha1");
+ if(!digest_open_by_name(&myself->digest, digest)) {
+ logger(LOG_ERR, _("Unrecognized digest type!"));
+ return false;
}
- /* Check if we want to use message authentication codes... */
+ if(!get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &myself->maclength))
- if(get_config_string
- (lookup_config(myself->connection->config_tree, "Digest"), &digest)) {
- if(!strcasecmp(digest, "none")) {
- myself->digest = NULL;
- } else {
- myself->digest = EVP_get_digestbyname(digest);
-
- if(!myself->digest) {
- logger(LOG_ERR, _("Unrecognized digest type!"));
- return false;
- }
- }
- } else
- myself->digest = EVP_sha1();
-
- myself->connection->outdigest = EVP_sha1();
-
- if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"),
- &myself->maclength)) {
- if(myself->digest) {
- if(myself->maclength > myself->digest->md_size) {
- logger(LOG_ERR, _("MAC length exceeds size of digest!"));
- return false;
- } else if(myself->maclength < 0) {
- logger(LOG_ERR, _("Bogus MAC length!"));
- return false;
- }
+ if(digest_active(&myself->digest)) {
+ if(myself->maclength > digest_length(&myself->digest)) {
+ logger(LOG_ERR, _("MAC length exceeds size of digest!"));
+ return false;
+ } else if(myself->maclength < 0) {
+ logger(LOG_ERR, _("Bogus MAC length!"));
+ return false;
}
- } else
- myself->maclength = 4;
-
- myself->connection->outmaclength = 0;
+ }
/* Compression */
- if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"),
- &myself->compression)) {
+ if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"), &myself->compression)) {
if(myself->compression < 0 || myself->compression > 11) {
logger(LOG_ERR, _("Bogus compression level!"));
return false;
if(!setup_device())
return false;
+ event_set(&device_ev, device_fd, EV_READ|EV_PERSIST, handle_device_data, NULL);
+
+ if (event_add(&device_ev, NULL) < 0) {
+ logger(LOG_ERR, _("event_add failed: %s"), strerror(errno));
+ close_device();
+ return false;
+ }
+
/* Run tinc-up script to further initialize the tap interface */
asprintf(&envp[0], "NETNAME=%s", netname ? : "");
asprintf(&envp[1], "DEVICE=%s", device ? : "");
listen_socket[listen_sockets].udp =
setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
- if(listen_socket[listen_sockets].udp < 0)
+ if(listen_socket[listen_sockets].udp < 0) {
+ close(listen_socket[listen_sockets].tcp);
continue;
+ }
+
+ event_set(&listen_socket[listen_sockets].ev_tcp,
+ listen_socket[listen_sockets].tcp,
+ EV_READ|EV_PERSIST,
+ handle_new_meta_connection, NULL);
+ if(event_add(&listen_socket[listen_sockets].ev_tcp, NULL) < 0) {
+ logger(LOG_EMERG, _("event_add failed: %s"), strerror(errno));
+ abort();
+ }
+
+ event_set(&listen_socket[listen_sockets].ev_udp,
+ listen_socket[listen_sockets].udp,
+ EV_READ|EV_PERSIST,
+ handle_incoming_vpn_data, NULL);
+ if(event_add(&listen_socket[listen_sockets].ev_udp, NULL) < 0) {
+ logger(LOG_EMERG, _("event_add failed: %s"), strerror(errno));
+ abort();
+ }
ifdebug(CONNECTIONS) {
hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
listen_sockets++;
+
+ if(listen_sockets >= MAXSOCKETS) {
+ logger(LOG_WARNING, _("Maximum of %d listening sockets reached"), MAXSOCKETS);
+ break;
+ }
}
freeaddrinfo(ai);
/*
setup all initial network connections
*/
-bool setup_network_connections(void)
-{
+bool setup_network_connections(void) {
cp();
- now = time(NULL);
-
- init_events();
init_connections();
init_subnets();
init_nodes();
pingtimeout = pinginterval;
if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
- maxoutbufsize = 4 * MTU;
+ maxoutbufsize = 10 * MTU;
if(!setup_myself())
return false;
/*
close all open network connections
*/
-void close_network_connections(void)
-{
- avl_node_t *node, *next;
+void close_network_connections(void) {
+ splay_node_t *node, *next;
connection_t *c;
char *envp[5];
int i;
for(node = connection_tree->head; node; node = next) {
next = node->next;
c = node->data;
-
- if(c->outgoing) {
- if(c->outgoing->ai)
- freeaddrinfo(c->outgoing->ai);
- free(c->outgoing->name);
- free(c->outgoing);
- c->outgoing = NULL;
- }
-
+ c->outgoing = false;
terminate_connection(c, false);
}
+ list_delete_list(outgoing_list);
+
if(myself && myself->connection) {
subnet_update(myself, NULL, false);
terminate_connection(myself->connection, false);
+ free_connection(myself->connection);
}
for(i = 0; i < listen_sockets; i++) {
+ event_del(&listen_socket[i].ev_tcp);
+ event_del(&listen_socket[i].ev_udp);
close(listen_socket[i].tcp);
close(listen_socket[i].udp);
}
exit_subnets();
exit_nodes();
exit_connections();
- exit_events();
execute_script("tinc-down", envp);
- EVP_CIPHER_CTX_cleanup(&packet_ctx);
-
+ if(myport) free(myport);
+
for(i = 0; i < 4; i++)
free(envp[i]);
/*
net_socket.c -- Handle various kinds of sockets.
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2007 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "system.h"
-#include "avl_tree.h"
+#include "splay_tree.h"
#include "conf.h"
#include "connection.h"
-#include "event.h"
#include "logger.h"
#include "meta.h"
#include "net.h"
listen_socket_t listen_socket[MAXSOCKETS];
int listen_sockets;
+ list_t *outgoing_list = NULL;
/* Setup sockets */
-static void configure_tcp(connection_t *c)
-{
+static void configure_tcp(connection_t *c) {
int option;
#ifdef O_NONBLOCK
#if defined(SOL_TCP) && defined(TCP_NODELAY)
option = 1;
- setsockopt(c->socket, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
+ setsockopt(c->socket, SOL_TCP, TCP_NODELAY, &option, sizeof option);
#endif
#if defined(SOL_IP) && defined(IP_TOS) && defined(IPTOS_LOWDELAY)
option = IPTOS_LOWDELAY;
- setsockopt(c->socket, SOL_IP, IP_TOS, &option, sizeof(option));
+ setsockopt(c->socket, SOL_IP, IP_TOS, &option, sizeof option);
#endif
}
-int setup_listen_socket(const sockaddr_t *sa)
-{
+int setup_listen_socket(const sockaddr_t *sa) {
int nfd;
char *addrstr;
int option;
/* Optimize TCP settings */
option = 1;
- setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
+ setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof option);
#if defined(SOL_IPV6) && defined(IPV6_V6ONLY)
if(sa->sa.sa_family == AF_INET6)
#if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE)
struct ifreq ifr;
- memset(&ifr, 0, sizeof(ifr));
+ memset(&ifr, 0, sizeof ifr);
strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
- if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr))) {
+ if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof ifr)) {
closesocket(nfd);
logger(LOG_ERR, _("Can't bind to interface %s: %s"), iface,
strerror(errno));
return nfd;
}
-int setup_vpn_in_socket(const sockaddr_t *sa)
-{
+int setup_vpn_in_socket(const sockaddr_t *sa) {
int nfd;
char *addrstr;
int option;
#endif
option = 1;
- setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
+ setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof option);
#if defined(SOL_IPV6) && defined(IPV6_V6ONLY)
if(sa->sa.sa_family == AF_INET6)
#endif
#if defined(SOL_IP) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
- {
- bool choice;
-
- if(get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) && choice) {
- option = IP_PMTUDISC_DO;
- setsockopt(nfd, SOL_IP, IP_MTU_DISCOVER, &option, sizeof option);
- }
+ if(myself->options & OPTION_PMTU_DISCOVERY) {
+ option = IP_PMTUDISC_DO;
+ setsockopt(nfd, SOL_IP, IP_MTU_DISCOVER, &option, sizeof(option));
}
#endif
#if defined(SOL_IPV6) && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
- {
- bool choice;
-
- if(get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) && choice) {
- option = IPV6_PMTUDISC_DO;
- setsockopt(nfd, SOL_IPV6, IPV6_MTU_DISCOVER, &option, sizeof option);
- }
+ if(myself->options & OPTION_PMTU_DISCOVERY) {
+ option = IPV6_PMTUDISC_DO;
+ setsockopt(nfd, SOL_IPV6, IPV6_MTU_DISCOVER, &option, sizeof(option));
}
#endif
struct ifreq ifr;
if(get_config_string(lookup_config(config_tree, "BindToInterface"), &iface)) {
- memset(&ifr, 0, sizeof(ifr));
+ memset(&ifr, 0, sizeof ifr);
strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
- if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr))) {
+ if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof ifr)) {
closesocket(nfd);
logger(LOG_ERR, _("Can't bind to interface %s: %s"), iface,
strerror(errno));
return nfd;
}
-void retry_outgoing(outgoing_t *outgoing)
-{
- event_t *event;
+static void retry_outgoing_handler(int fd, short events, void *data) {
+ setup_outgoing_connection(data);
+}
+void retry_outgoing(outgoing_t *outgoing) {
cp();
outgoing->timeout += 5;
if(outgoing->timeout > maxtimeout)
outgoing->timeout = maxtimeout;
- event = new_event();
- event->handler = (event_handler_t) setup_outgoing_connection;
- event->time = now + outgoing->timeout;
- event->data = outgoing;
- event_add(event);
+ timeout_set(&outgoing->ev, retry_outgoing_handler, outgoing);
+ event_add(&outgoing->ev, &(struct timeval){outgoing->timeout, 0});
ifdebug(CONNECTIONS) logger(LOG_NOTICE,
_("Trying to re-establish outgoing connection in %d seconds"),
outgoing->timeout);
}
-void finish_connecting(connection_t *c)
-{
+void finish_connecting(connection_t *c) {
cp();
ifdebug(CONNECTIONS) logger(LOG_INFO, _("Connected to %s (%s)"), c->name, c->hostname);
configure_tcp(c);
- c->last_ping_time = now;
+ c->last_ping_time = time(NULL);
+ c->status.connecting = false;
send_id(c);
}
-void do_outgoing_connection(connection_t *c)
-{
+void do_outgoing_connection(connection_t *c) {
char *address, *port;
int result;
if(!c->outgoing->cfg) {
ifdebug(CONNECTIONS) logger(LOG_ERR, _("Could not set up a meta connection to %s"),
c->name);
- c->status.remove = true;
retry_outgoing(c->outgoing);
+ c->outgoing = NULL;
+ connection_del(c);
return;
}
return;
}
-void setup_outgoing_connection(outgoing_t *outgoing)
-{
+void handle_meta_read(struct bufferevent *event, void *data) {
+ logger(LOG_EMERG, _("handle_meta_read() called"));
+ abort();
+}
+
+void handle_meta_write(struct bufferevent *event, void *data) {
+ ifdebug(META) logger(LOG_DEBUG, _("handle_meta_write() called"));
+}
+
+void handle_meta_connection_error(struct bufferevent *event, short what, void *data) {
+ connection_t *c = data;
+ logger(LOG_EMERG, _("handle_meta_connection_error() called: %d: %s"), what, strerror(errno));
+ terminate_connection(c, c->status.active);
+}
+
+void setup_outgoing_connection(outgoing_t *outgoing) {
connection_t *c;
node_t *n;
if(!outgoing->cfg) {
logger(LOG_ERR, _("No address specified for %s"), c->name);
free_connection(c);
- free(outgoing->name);
- free(outgoing);
return;
}
c->outgoing = outgoing;
- c->last_ping_time = now;
+ c->last_ping_time = time(NULL);
connection_add(c);
do_outgoing_connection(c);
+
+ event_set(&c->inevent, c->socket, EV_READ | EV_PERSIST, handle_meta_connection_data, c);
+ event_add(&c->inevent, NULL);
+ c->buffer = bufferevent_new(c->socket, handle_meta_read, handle_meta_write, handle_meta_connection_error, c);
+ if(!c->buffer) {
+ logger(LOG_EMERG, _("bufferevent_new() failed: %s"), strerror(errno));
+ abort();
+ }
+ bufferevent_disable(c->buffer, EV_READ);
}
/*
accept a new tcp connect and create a
new connection
*/
-bool handle_new_meta_connection(int sock)
-{
+void handle_new_meta_connection(int sock, short events, void *data) {
connection_t *c;
sockaddr_t sa;
int fd;
- socklen_t len = sizeof(sa);
+ socklen_t len = sizeof sa;
cp();
fd = accept(sock, &sa.sa, &len);
if(fd < 0) {
- logger(LOG_ERR, _("Accepting a new connection failed: %s"),
- strerror(errno));
- return false;
+ logger(LOG_ERR, _("Accepting a new connection failed: %s"), strerror(errno));
+ return;
}
sockaddrunmap(&sa);
c->address = sa;
c->hostname = sockaddr2hostname(&sa);
c->socket = fd;
- c->last_ping_time = now;
+ c->last_ping_time = time(NULL);
ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Connection from %s"), c->hostname);
+ event_set(&c->inevent, c->socket, EV_READ | EV_PERSIST, handle_meta_connection_data, c);
+ event_add(&c->inevent, NULL);
+ c->buffer = bufferevent_new(c->socket, NULL, handle_meta_write, handle_meta_connection_error, c);
+ if(!c->buffer) {
+ logger(LOG_EMERG, _("bufferevent_new() failed: %s"), strerror(errno));
+ abort();
+ }
+ bufferevent_disable(c->buffer, EV_READ);
+
configure_tcp(c);
connection_add(c);
c->allow_request = ID;
send_id(c);
-
- return true;
}
- void try_outgoing_connections(void) {
+ void free_outgoing(outgoing_t *outgoing) {
+ if(outgoing->ai)
+ freeaddrinfo(outgoing->ai);
+
+ if(outgoing->name)
+ free(outgoing->name);
+
+ free(outgoing);
+ }
+
+ void try_outgoing_connections(void)
+ {
static config_t *cfg = NULL;
char *name;
outgoing_t *outgoing;
-
+ connection_t *c;
- avl_node_t *node;
++ splay_node_t *node;
+
cp();
+ if(outgoing_list) {
+ for(node = connection_tree->head; node; node = node->next) {
+ c = node->data;
+ c->outgoing = NULL;
+ }
+
+ list_delete_list(outgoing_list);
+ }
+
+ outgoing_list = list_alloc((list_action_t)free_outgoing);
+
for(cfg = lookup_config(config_tree, "ConnectTo"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
get_config_string(cfg, &name);
continue;
}
- outgoing = xmalloc_and_zero(sizeof(*outgoing));
+ outgoing = xmalloc_and_zero(sizeof *outgoing);
outgoing->name = name;
+ list_insert_tail(outgoing_list, outgoing);
setup_outgoing_connection(outgoing);
}
}
/*
node.c -- node tree management
- Copyright (C) 2001-2006 Guus Sliepen <guus@tinc-vpn.org>,
+ Copyright (C) 2001-2009 Guus Sliepen <guus@tinc-vpn.org>,
2001-2005 Ivo Timmermans
This program is free software; you can redistribute it and/or modify
#include "system.h"
-#include "avl_tree.h"
+#include "splay_tree.h"
#include "logger.h"
#include "net.h"
#include "netutl.h"
#include "utils.h"
#include "xalloc.h"
-avl_tree_t *node_tree; /* Known nodes, sorted by name */
-avl_tree_t *node_udp_tree; /* Known nodes, sorted by address and port */
+splay_tree_t *node_tree; /* Known nodes, sorted by name */
+splay_tree_t *node_udp_tree; /* Known nodes, sorted by address and port */
node_t *myself;
-static int node_compare(const node_t *a, const node_t *b)
-{
+static int node_compare(const node_t *a, const node_t *b) {
return strcmp(a->name, b->name);
}
-static int node_udp_compare(const node_t *a, const node_t *b)
-{
+static int node_udp_compare(const node_t *a, const node_t *b) {
int result;
cp();
return (a->name && b->name) ? strcmp(a->name, b->name) : 0;
}
-void init_nodes(void)
-{
+void init_nodes(void) {
cp();
- node_tree = avl_alloc_tree((avl_compare_t) node_compare, (avl_action_t) free_node);
- node_udp_tree = avl_alloc_tree((avl_compare_t) node_udp_compare, NULL);
+ node_tree = splay_alloc_tree((splay_compare_t) node_compare, (splay_action_t) free_node);
+ node_udp_tree = splay_alloc_tree((splay_compare_t) node_udp_compare, NULL);
}
-void exit_nodes(void)
-{
+void exit_nodes(void) {
cp();
- avl_delete_tree(node_udp_tree);
- avl_delete_tree(node_tree);
+ splay_delete_tree(node_udp_tree);
+ splay_delete_tree(node_tree);
}
-node_t *new_node(void)
-{
- node_t *n = xmalloc_and_zero(sizeof(*n));
+node_t *new_node(void) {
+ node_t *n = xmalloc_and_zero(sizeof *n);
cp();
n->subnet_tree = new_subnet_tree();
n->edge_tree = new_edge_tree();
- n->queue = list_alloc((list_action_t) free);
- EVP_CIPHER_CTX_init(&n->packet_ctx);
n->mtu = MTU;
n->maxmtu = MTU;
return n;
}
-void free_node(node_t *n)
-{
+void free_node(node_t *n) {
cp();
- if(n->queue)
- list_delete_list(n->queue);
- if(n->key)
- free(n->key);
--
if(n->subnet_tree)
free_subnet_tree(n->subnet_tree);
sockaddrfree(&n->address);
- EVP_CIPHER_CTX_cleanup(&n->packet_ctx);
+ cipher_close(&n->cipher);
+ digest_close(&n->digest);
- if(n->mtuevent)
- event_del(n->mtuevent);
+ event_del(&n->mtuevent);
if(n->hostname)
free(n->hostname);
free(n);
}
-void node_add(node_t *n)
-{
+void node_add(node_t *n) {
cp();
- avl_insert(node_tree, n);
+ splay_insert(node_tree, n);
}
-void node_del(node_t *n)
-{
- avl_node_t *node, *next;
+void node_del(node_t *n) {
+ splay_node_t *node, *next;
edge_t *e;
subnet_t *s;
edge_del(e);
}
- avl_delete(node_tree, n);
+ splay_delete(node_tree, n);
}
-node_t *lookup_node(char *name)
-{
+node_t *lookup_node(char *name) {
node_t n = {0};
cp();
n.name = name;
- return avl_search(node_tree, &n);
+ return splay_search(node_tree, &n);
}
-node_t *lookup_node_udp(const sockaddr_t *sa)
-{
+node_t *lookup_node_udp(const sockaddr_t *sa) {
node_t n = {0};
cp();
n.address = *sa;
n.name = NULL;
- return avl_search(node_udp_tree, &n);
+ return splay_search(node_udp_tree, &n);
}
-void dump_nodes(void)
-{
- avl_node_t *node;
+int dump_nodes(struct evbuffer *out) {
+ splay_node_t *node;
node_t *n;
cp();
- logger(LOG_DEBUG, _("Nodes:"));
-
for(node = node_tree->head; node; node = node->next) {
n = node->data;
- logger(LOG_DEBUG, _(" %s at %s cipher %d digest %d maclength %d compression %d options %lx status %04x nexthop %s via %s pmtu %d (min %d max %d)"),
- n->name, n->hostname, n->cipher ? n->cipher->nid : 0,
- n->digest ? n->digest->type : 0, n->maclength, n->compression,
+ if(evbuffer_add_printf(out, _(" %s at %s cipher %d digest %d maclength %d compression %d options %lx status %04x nexthop %s via %s distance %d pmtu %d (min %d max %d)\n"),
+ n->name, n->hostname, cipher_get_nid(&n->cipher),
+ digest_get_nid(&n->digest), n->maclength, n->compression,
n->options, *(uint32_t *)&n->status, n->nexthop ? n->nexthop->name : "-",
- n->via ? n->via->name : "-", n->mtu, n->minmtu, n->maxmtu);
+ n->via ? n->via->name : "-", n->distance, n->mtu, n->minmtu, n->maxmtu) == -1)
+ return errno;
}
- logger(LOG_DEBUG, _("End of nodes."));
+ return 0;
}
/*
node.h -- header for node.c
- Copyright (C) 2001-2006 Guus Sliepen <guus@tinc-vpn.org>,
+ Copyright (C) 2001-2009 Guus Sliepen <guus@tinc-vpn.org>,
2001-2005 Ivo Timmermans
This program is free software; you can redistribute it and/or modify
#ifndef __TINC_NODE_H__
#define __TINC_NODE_H__
-#include "avl_tree.h"
+#include <event.h>
+
+#include "splay_tree.h"
+#include "cipher.h"
#include "connection.h"
-#include "event.h"
+#include "digest.h"
#include "list.h"
#include "subnet.h"
node_status_t status;
- const EVP_CIPHER *cipher; /* Cipher type for UDP packets */
- char *key; /* Cipher key and iv */
- int keylength; /* Cipher key and iv length */
- EVP_CIPHER_CTX packet_ctx; /* Cipher context */
-
- const EVP_MD *digest; /* Digest type for MAC */
- int maclength; /* Length of MAC */
+ cipher_t cipher; /* Cipher for UDP packets */
+ digest_t digest; /* Digest for UDP packets */
+ int maclength; /* Portion of digest to use */
int compression; /* Compressionlevel, 0 = no compression */
- list_t *queue; /* Queue for packets awaiting to be encrypted */
-
+ int distance;
struct node_t *nexthop; /* nearest node from us to him */
struct node_t *via; /* next hop for UDP packets */
- avl_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this node */
+ splay_tree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this node */
- avl_tree_t *edge_tree; /* Edges with this node as one of the endpoints */
+ splay_tree_t *edge_tree; /* Edges with this node as one of the endpoints */
struct connection_t *connection; /* Connection associated with this node (if a direct connection exists) */
length_t minmtu; /* Probed minimum MTU */
length_t maxmtu; /* Probed maximum MTU */
int mtuprobes; /* Number of probes */
- event_t *mtuevent; /* Probe event */
+ struct event mtuevent; /* Probe event */
} node_t;
extern struct node_t *myself;
-extern avl_tree_t *node_tree;
-extern avl_tree_t *node_udp_tree;
+extern splay_tree_t *node_tree;
+extern splay_tree_t *node_udp_tree;
extern void init_nodes(void);
extern void exit_nodes(void);
extern void node_del(node_t *);
extern node_t *lookup_node(char *);
extern node_t *lookup_node_udp(const sockaddr_t *);
-extern void dump_nodes(void);
+extern int dump_nodes(struct evbuffer *);
#endif /* __TINC_NODE_H__ */
/*
process.c -- process management functions
Copyright (C) 1999-2005 Ivo Timmermans,
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2007 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "conf.h"
#include "connection.h"
+#include "control.h"
#include "device.h"
#include "edge.h"
#include "logger.h"
#include "node.h"
-#include "pidfile.h"
#include "process.h"
#include "subnet.h"
#include "utils.h"
/* If zero, don't detach from the terminal. */
bool do_detach = true;
-bool sighup = false;
bool sigalrm = false;
extern char *identname;
-extern char *pidfilename;
extern char **g_argv;
extern bool use_logfile;
-extern volatile bool running;
sigset_t emptysigset;
-static int saved_debug_level = -1;
-
-static void memory_full(int size)
-{
+static void memory_full(int size) {
logger(LOG_ERR, _("Memory exhausted (couldn't allocate %d bytes), exitting."), size);
cp_trace();
exit(1);
return ERROR_CALL_NOT_IMPLEMENTED;
}
- if(running) {
- running = false;
- status.dwWaitHint = 30000;
- status.dwCurrentState = SERVICE_STOP_PENDING;
- SetServiceStatus(statushandle, &status);
- return NO_ERROR;
- } else {
- status.dwWaitHint = 0;
- status.dwCurrentState = SERVICE_STOPPED;
- SetServiceStatus(statushandle, &status);
- exit(1);
- }
-
+ event_loopexit(NULL);
+ status.dwWaitHint = 30000;
+ status.dwCurrentState = SERVICE_STOP_PENDING;
+ SetServiceStatus(statushandle, &status);
+ return NO_ERROR;
}
-VOID WINAPI run_service(DWORD argc, LPTSTR* argv)
-{
+VOID WINAPI run_service(DWORD argc, LPTSTR* argv) {
int err = 1;
extern int main2(int argc, char **argv);
}
#endif
-#ifndef HAVE_MINGW
-/*
- check for an existing tinc for this net, and write pid to pidfile
-*/
-static bool write_pidfile(void)
-{
- pid_t pid;
-
- cp();
-
- pid = check_pid(pidfilename);
-
- if(pid) {
- if(netname)
- fprintf(stderr, _("A tincd is already running for net `%s' with pid %ld.\n"),
- netname, (long)pid);
- else
- fprintf(stderr, _("A tincd is already running with pid %ld.\n"), (long)pid);
- return false;
- }
-
- /* if it's locked, write-protected, or whatever */
- if(!write_pid(pidfilename)) {
- fprintf(stderr, _("Could write pid file %s: %s\n"), pidfilename, strerror(errno));
- return false;
- }
-
- return true;
-}
-#endif
-
-/*
- kill older tincd for this net
-*/
-bool kill_other(int signal)
-{
-#ifndef HAVE_MINGW
- pid_t pid;
-
- cp();
-
- pid = read_pid(pidfilename);
-
- if(!pid) {
- if(netname)
- fprintf(stderr, _("No other tincd is running for net `%s'.\n"),
- netname);
- else
- fprintf(stderr, _("No other tincd is running.\n"));
- return false;
- }
-
- errno = 0; /* No error, sometimes errno is only changed on error */
-
- /* ESRCH is returned when no process with that pid is found */
- if(kill(pid, signal) && errno == ESRCH) {
- if(netname)
- fprintf(stderr, _("The tincd for net `%s' is no longer running. "),
- netname);
- else
- fprintf(stderr, _("The tincd is no longer running. "));
-
- fprintf(stderr, _("Removing stale lock file.\n"));
- remove_pid(pidfilename);
- }
-
- return true;
-#else
- return remove_service();
-#endif
-}
-
/*
- Detach from current terminal, write pidfile, kill parent
+ Detach from current terminal
*/
-bool detach(void)
-{
+bool detach(void) {
cp();
setup_signals();
- /* First check if we can open a fresh new pidfile */
-
#ifndef HAVE_MINGW
- if(!write_pidfile())
- return false;
-
- /* If we succeeded in doing that, detach */
-
closelogger();
#endif
strerror(errno));
return false;
}
-
- /* Now UPDATE the pid in the pidfile, because we changed it... */
-
- if(!write_pid(pidfilename)) {
- fprintf(stderr, _("Could not write pid file %s: %s\n"), pidfilename, strerror(errno));
- return false;
- }
#else
if(!statushandle)
exit(install_service());
return true;
}
-bool execute_script(const char *name, char **envp)
-{
+bool execute_script(const char *name, char **envp) {
#ifdef HAVE_SYSTEM
int status, len;
struct stat s;
*/
#ifndef HAVE_MINGW
-static RETSIGTYPE sigterm_handler(int a)
-{
- logger(LOG_NOTICE, _("Got %s signal"), "TERM");
- if(running)
- running = false;
- else
- exit(1);
-}
-
-static RETSIGTYPE sigquit_handler(int a)
-{
- logger(LOG_NOTICE, _("Got %s signal"), "QUIT");
- if(running)
- running = false;
- else
- exit(1);
-}
-
-static RETSIGTYPE fatal_signal_square(int a)
-{
+static RETSIGTYPE fatal_signal_square(int a) {
logger(LOG_ERR, _("Got another fatal signal %d (%s): not restarting."), a,
strsignal(a));
cp_trace();
exit(1);
}
-static RETSIGTYPE fatal_signal_handler(int a)
-{
+static RETSIGTYPE fatal_signal_handler(int a) {
struct sigaction act;
logger(LOG_ERR, _("Got fatal signal %d (%s)"), a, strsignal(a));
cp_trace();
close_network_connections();
sleep(5);
- remove_pid(pidfilename);
+ exit_control();
execvp(g_argv[0], g_argv);
} else {
logger(LOG_NOTICE, _("Not restarting."));
}
}
-static RETSIGTYPE sighup_handler(int a)
-{
- logger(LOG_NOTICE, _("Got %s signal"), "HUP");
- sighup = true;
-}
-
-static RETSIGTYPE sigint_handler(int a)
-{
- logger(LOG_NOTICE, _("Got %s signal"), "INT");
-
- if(saved_debug_level != -1) {
- logger(LOG_NOTICE, _("Reverting to old debug level (%d)"),
- saved_debug_level);
- debug_level = saved_debug_level;
- saved_debug_level = -1;
- } else {
- logger(LOG_NOTICE,
- _("Temporarily setting debug level to 5. Kill me with SIGINT again to go back to level %d."),
- debug_level);
- saved_debug_level = debug_level;
- debug_level = 5;
- }
-}
-
-static RETSIGTYPE sigalrm_handler(int a)
-{
- logger(LOG_NOTICE, _("Got %s signal"), "ALRM");
- sigalrm = true;
-}
-
-static RETSIGTYPE sigusr1_handler(int a)
-{
- dump_connections();
-}
-
-static RETSIGTYPE sigusr2_handler(int a)
-{
- dump_device_stats();
- dump_nodes();
- dump_edges();
- dump_subnets();
-}
-
-static RETSIGTYPE sigwinch_handler(int a)
-{
- do_purge = true;
-}
-
-static RETSIGTYPE unexpected_signal_handler(int a)
-{
+static RETSIGTYPE unexpected_signal_handler(int a) {
logger(LOG_WARNING, _("Got unexpected signal %d (%s)"), a, strsignal(a));
cp_trace();
}
-static RETSIGTYPE ignore_signal_handler(int a)
-{
+static RETSIGTYPE ignore_signal_handler(int a) {
ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Ignored signal %d (%s)"), a, strsignal(a));
}
int signal;
void (*handler)(int);
} sighandlers[] = {
- {SIGHUP, sighup_handler},
- {SIGTERM, sigterm_handler},
- {SIGQUIT, sigquit_handler},
{SIGSEGV, fatal_signal_handler},
{SIGBUS, fatal_signal_handler},
{SIGILL, fatal_signal_handler},
{SIGPIPE, ignore_signal_handler},
- {SIGINT, sigint_handler},
- {SIGUSR1, sigusr1_handler},
- {SIGUSR2, sigusr2_handler},
{SIGCHLD, ignore_signal_handler},
- {SIGALRM, sigalrm_handler},
- {SIGWINCH, sigwinch_handler},
{0, NULL}
};
#endif
-void setup_signals(void)
-{
+void setup_signals(void) {
#ifndef HAVE_MINGW
int i;
struct sigaction act;
/* If we didn't detach, allow coredumps */
if(!do_detach)
- sighandlers[3].handler = SIG_DFL;
+ sighandlers[0].handler = SIG_DFL;
/* Then, for each known signal that we want to catch, assign a
handler to the signal, with error checking this time. */
/*
protocol_auth.c -- handle the meta-protocol, authentication
Copyright (C) 1999-2005 Ivo Timmermans,
- 2000-2007 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "system.h"
-#include <openssl/sha.h>
-#include <openssl/rand.h>
-#include <openssl/err.h>
-#include <openssl/evp.h>
-
-#include "avl_tree.h"
+#include "splay_tree.h"
#include "conf.h"
#include "connection.h"
+#include "crypto.h"
#include "edge.h"
#include "graph.h"
#include "logger.h"
#include "netutl.h"
#include "node.h"
#include "protocol.h"
+#include "rsa.h"
#include "utils.h"
#include "xalloc.h"
-bool send_id(connection_t *c)
-{
+bool send_id(connection_t *c) {
cp();
+ gettimeofday(&c->start, NULL);
+
return send_request(c, "%d %s %d", ID, myself->connection->name,
myself->connection->protocol_version);
}
-bool id_h(connection_t *c)
-{
+bool id_h(connection_t *c, char *request) {
char name[MAX_STRING_SIZE];
cp();
- if(sscanf(c->buffer, "%*d " MAX_STRING " %d", name, &c->protocol_version) != 2) {
+ if(sscanf(request, "%*d " MAX_STRING " %d", name, &c->protocol_version) != 2) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ID", c->name,
c->hostname);
return false;
return send_metakey(c);
}
-bool send_metakey(connection_t *c)
-{
- char *buffer;
- int len;
- bool x;
+bool send_metakey(connection_t *c) {
+ size_t len = rsa_size(&c->rsa);
+ char key[len];
+ char enckey[len];
+ char hexkey[2 * len + 1];
cp();
- len = RSA_size(c->rsa_key);
-
- /* Allocate buffers for the meta key */
-
- buffer = alloca(2 * len + 1);
+ if(!cipher_open_blowfish_ofb(&c->outcipher))
+ return false;
- if(!c->outkey)
- c->outkey = xmalloc(len);
+ if(!digest_open_sha1(&c->outdigest))
+ return false;
- if(!c->outctx)
- c->outctx = xmalloc_and_zero(sizeof(*c->outctx));
- cp();
- /* Copy random data to the buffer */
+ /* Create a random key */
- RAND_pseudo_bytes((unsigned char *)c->outkey, len);
+ randomize(key, len);
/* The message we send must be smaller than the modulus of the RSA key.
By definition, for a key of k bits, the following formula holds:
This can be done by setting the most significant bit to zero.
*/
- c->outkey[0] &= 0x7F;
+ key[0] &= 0x7F;
+
+ cipher_set_key_from_rsa(&c->outcipher, key, len, true);
ifdebug(SCARY_THINGS) {
- bin2hex(c->outkey, buffer, len);
- buffer[len * 2] = '\0';
- logger(LOG_DEBUG, _("Generated random meta key (unencrypted): %s"),
- buffer);
+ bin2hex(key, hexkey, len);
+ hexkey[len * 2] = '\0';
+ logger(LOG_DEBUG, _("Generated random meta key (unencrypted): %s"), hexkey);
}
/* Encrypt the random data
with a length equal to that of the modulus of the RSA key.
*/
- if(RSA_public_encrypt(len, (unsigned char *)c->outkey, (unsigned char *)buffer, c->rsa_key, RSA_NO_PADDING) != len) {
- logger(LOG_ERR, _("Error during encryption of meta key for %s (%s)"),
- c->name, c->hostname);
+ if(!rsa_public_encrypt(&c->rsa, key, len, enckey)) {
+ logger(LOG_ERR, _("Error during encryption of meta key for %s (%s)"), c->name, c->hostname);
return false;
}
/* Convert the encrypted random data to a hexadecimal formatted string */
- bin2hex(buffer, buffer, len);
- buffer[len * 2] = '\0';
+ bin2hex(enckey, hexkey, len);
+ hexkey[len * 2] = '\0';
/* Send the meta key */
- x = send_request(c, "%d %d %d %d %d %s", METAKEY,
- c->outcipher ? c->outcipher->nid : 0,
- c->outdigest ? c->outdigest->type : 0, c->outmaclength,
- c->outcompression, buffer);
-
- /* Further outgoing requests are encrypted with the key we just generated */
-
- if(c->outcipher) {
- if(!EVP_EncryptInit(c->outctx, c->outcipher,
- (unsigned char *)c->outkey + len - c->outcipher->key_len,
- (unsigned char *)c->outkey + len - c->outcipher->key_len -
- c->outcipher->iv_len)) {
- logger(LOG_ERR, _("Error during initialisation of cipher for %s (%s): %s"),
- c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
- return false;
- }
-
- c->status.encryptout = true;
- }
-
- return x;
+ bool result = send_request(c, "%d %d %d %d %d %s", METAKEY,
+ cipher_get_nid(&c->outcipher),
+ digest_get_nid(&c->outdigest), c->outmaclength,
+ c->outcompression, hexkey);
+
+ c->status.encryptout = true;
+ return result;
}
-bool metakey_h(connection_t *c)
-{
- char buffer[MAX_STRING_SIZE];
+bool metakey_h(connection_t *c, char *request) {
+ char hexkey[MAX_STRING_SIZE];
int cipher, digest, maclength, compression;
- int len;
+ size_t len = rsa_size(&myself->connection->rsa);
+ char enckey[len];
+ char key[len];
cp();
- if(sscanf(c->buffer, "%*d %d %d %d %d " MAX_STRING, &cipher, &digest, &maclength, &compression, buffer) != 5) {
- logger(LOG_ERR, _("Got bad %s from %s (%s)"), "METAKEY", c->name,
- c->hostname);
+ if(sscanf(request, "%*d %d %d %d %d " MAX_STRING, &cipher, &digest, &maclength, &compression, hexkey) != 5) {
+ logger(LOG_ERR, _("Got bad %s from %s (%s)"), "METAKEY", c->name, c->hostname);
return false;
}
- len = RSA_size(myself->connection->rsa_key);
-
/* Check if the length of the meta key is all right */
- if(strlen(buffer) != len * 2) {
+ if(strlen(hexkey) != len * 2) {
logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, "wrong keylength");
return false;
}
- /* Allocate buffers for the meta key */
-
- if(!c->inkey)
- c->inkey = xmalloc(len);
-
- if(!c->inctx)
- c->inctx = xmalloc_and_zero(sizeof(*c->inctx));
-
/* Convert the challenge from hexadecimal back to binary */
- hex2bin(buffer, buffer, len);
+ hex2bin(hexkey, enckey, len);
/* Decrypt the meta key */
- if(RSA_private_decrypt(len, (unsigned char *)buffer, (unsigned char *)c->inkey, myself->connection->rsa_key, RSA_NO_PADDING) != len) { /* See challenge() */
- logger(LOG_ERR, _("Error during decryption of meta key for %s (%s)"),
- c->name, c->hostname);
+ if(!rsa_private_decrypt(&myself->connection->rsa, enckey, len, key)) {
+ logger(LOG_ERR, _("Error during decryption of meta key for %s (%s)"), c->name, c->hostname);
return false;
}
ifdebug(SCARY_THINGS) {
- bin2hex(c->inkey, buffer, len);
- buffer[len * 2] = '\0';
- logger(LOG_DEBUG, _("Received random meta key (unencrypted): %s"), buffer);
+ bin2hex(key, hexkey, len);
+ hexkey[len * 2] = '\0';
+ logger(LOG_DEBUG, _("Received random meta key (unencrypted): %s"), hexkey);
}
- /* All incoming requests will now be encrypted. */
-
/* Check and lookup cipher and digest algorithms */
- if(cipher) {
- c->incipher = EVP_get_cipherbynid(cipher);
-
- if(!c->incipher) {
- logger(LOG_ERR, _("%s (%s) uses unknown cipher!"), c->name, c->hostname);
- return false;
- }
-
- if(!EVP_DecryptInit(c->inctx, c->incipher,
- (unsigned char *)c->inkey + len - c->incipher->key_len,
- (unsigned char *)c->inkey + len - c->incipher->key_len -
- c->incipher->iv_len)) {
- logger(LOG_ERR, _("Error during initialisation of cipher from %s (%s): %s"),
- c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
- return false;
- }
-
- c->status.decryptin = true;
- } else {
- c->incipher = NULL;
+ if(!cipher_open_by_nid(&c->incipher, cipher) || !cipher_set_key_from_rsa(&c->incipher, key, len, false)) {
+ logger(LOG_ERR, _("Error during initialisation of cipher from %s (%s)"), c->name, c->hostname);
+ return false;
}
- c->inmaclength = maclength;
-
- if(digest) {
- c->indigest = EVP_get_digestbynid(digest);
-
- if(!c->indigest) {
- logger(LOG_ERR, _("Node %s (%s) uses unknown digest!"), c->name, c->hostname);
- return false;
- }
-
- if(c->inmaclength > c->indigest->md_size || c->inmaclength < 0) {
- logger(LOG_ERR, _("%s (%s) uses bogus MAC length!"), c->name, c->hostname);
- return false;
- }
- } else {
- c->indigest = NULL;
+ if(!digest_open_by_nid(&c->indigest, digest)) {
+ logger(LOG_ERR, _("Error during initialisation of digest from %s (%s)"), c->name, c->hostname);
+ return false;
}
- c->incompression = compression;
+ c->status.decryptin = true;
c->allow_request = CHALLENGE;
return send_challenge(c);
}
-bool send_challenge(connection_t *c)
-{
- char *buffer;
- int len;
+bool send_challenge(connection_t *c) {
+ size_t len = rsa_size(&c->rsa);
+ char buffer[len * 2 + 1];
cp();
- /* CHECKME: what is most reasonable value for len? */
-
- len = RSA_size(c->rsa_key);
-
- /* Allocate buffers for the challenge */
-
- buffer = alloca(2 * len + 1);
-
if(!c->hischallenge)
c->hischallenge = xmalloc(len);
/* Copy random data to the buffer */
- RAND_pseudo_bytes((unsigned char *)c->hischallenge, len);
+ randomize(c->hischallenge, len);
/* Convert to hex */
return send_request(c, "%d %s", CHALLENGE, buffer);
}
-bool challenge_h(connection_t *c)
-{
+bool challenge_h(connection_t *c, char *request) {
char buffer[MAX_STRING_SIZE];
- int len;
+ size_t len = rsa_size(&myself->connection->rsa);
+ size_t digestlen = digest_length(&c->outdigest);
+ char digest[digestlen];
cp();
- if(sscanf(c->buffer, "%*d " MAX_STRING, buffer) != 1) {
- logger(LOG_ERR, _("Got bad %s from %s (%s)"), "CHALLENGE", c->name,
- c->hostname);
+ if(sscanf(request, "%*d " MAX_STRING, buffer) != 1) {
+ logger(LOG_ERR, _("Got bad %s from %s (%s)"), "CHALLENGE", c->name, c->hostname);
return false;
}
- len = RSA_size(myself->connection->rsa_key);
-
/* Check if the length of the challenge is all right */
if(strlen(buffer) != len * 2) {
- logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name,
- c->hostname, "wrong challenge length");
+ logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, "wrong challenge length");
return false;
}
- /* Allocate buffers for the challenge */
-
- if(!c->mychallenge)
- c->mychallenge = xmalloc(len);
-
/* Convert the challenge from hexadecimal back to binary */
- hex2bin(buffer, c->mychallenge, len);
+ hex2bin(buffer, buffer, len);
c->allow_request = CHAL_REPLY;
- /* Rest is done by send_chal_reply() */
-
- return send_chal_reply(c);
-}
-
-bool send_chal_reply(connection_t *c)
-{
- char hash[EVP_MAX_MD_SIZE * 2 + 1];
- EVP_MD_CTX ctx;
-
cp();
/* Calculate the hash from the challenge we received */
- if(!EVP_DigestInit(&ctx, c->indigest)
- || !EVP_DigestUpdate(&ctx, c->mychallenge, RSA_size(myself->connection->rsa_key))
- || !EVP_DigestFinal(&ctx, (unsigned char *)hash, NULL)) {
- logger(LOG_ERR, _("Error during calculation of response for %s (%s): %s"),
- c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
- return false;
- }
+ digest_create(&c->indigest, buffer, len, digest);
/* Convert the hash to a hexadecimal formatted string */
- bin2hex(hash, hash, c->indigest->md_size);
- hash[c->indigest->md_size * 2] = '\0';
+ bin2hex(digest, buffer, digestlen);
+ buffer[digestlen * 2] = '\0';
/* Send the reply */
- return send_request(c, "%d %s", CHAL_REPLY, hash);
+ return send_request(c, "%d %s", CHAL_REPLY, buffer);
}
-bool chal_reply_h(connection_t *c)
-{
+bool chal_reply_h(connection_t *c, char *request) {
char hishash[MAX_STRING_SIZE];
- char myhash[EVP_MAX_MD_SIZE];
- EVP_MD_CTX ctx;
cp();
- if(sscanf(c->buffer, "%*d " MAX_STRING, hishash) != 1) {
+ if(sscanf(request, "%*d " MAX_STRING, hishash) != 1) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "CHAL_REPLY", c->name,
c->hostname);
return false;
/* Check if the length of the hash is all right */
- if(strlen(hishash) != c->outdigest->md_size * 2) {
- logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name,
- c->hostname, _("wrong challenge reply length"));
+ if(strlen(hishash) != digest_length(&c->outdigest) * 2) {
+ logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, _("wrong challenge reply length"));
return false;
}
/* Convert the hash to binary format */
- hex2bin(hishash, hishash, c->outdigest->md_size);
+ hex2bin(hishash, hishash, digest_length(&c->outdigest));
- /* Calculate the hash from the challenge we sent */
-
- if(!EVP_DigestInit(&ctx, c->outdigest)
- || !EVP_DigestUpdate(&ctx, c->hischallenge, RSA_size(c->rsa_key))
- || !EVP_DigestFinal(&ctx, (unsigned char *)myhash, NULL)) {
- logger(LOG_ERR, _("Error during calculation of response from %s (%s): %s"),
- c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
- return false;
- }
-
- /* Verify the incoming hash with the calculated hash */
-
- if(memcmp(hishash, myhash, c->outdigest->md_size)) {
- logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name,
- c->hostname, _("wrong challenge reply"));
-
- ifdebug(SCARY_THINGS) {
- bin2hex(myhash, hishash, SHA_DIGEST_LENGTH);
- hishash[SHA_DIGEST_LENGTH * 2] = '\0';
- logger(LOG_DEBUG, _("Expected challenge reply: %s"), hishash);
- }
+ /* Verify the hash */
+ if(!digest_verify(&c->outdigest, c->hischallenge, rsa_size(&c->rsa), hishash)) {
+ logger(LOG_ERR, _("Possible intruder %s (%s): %s"), c->name, c->hostname, _("wrong challenge reply"));
return false;
}
Send an acknowledgement with the rest of the information needed.
*/
+ free(c->hischallenge);
+ c->hischallenge = NULL;
c->allow_request = ACK;
return send_ack(c);
}
-bool send_ack(connection_t *c)
-{
+bool send_ack(connection_t *c) {
/* ACK message contains rest of the information the other end needs
to create node_t and edge_t structures. */
if((get_config_bool(lookup_config(c->config_tree, "TCPOnly"), &choice) && choice) || myself->options & OPTION_TCPONLY)
c->options |= OPTION_TCPONLY | OPTION_INDIRECT;
- if((get_config_bool(lookup_config(c->config_tree, "PMTUDiscovery"), &choice) && choice) || myself->options & OPTION_PMTU_DISCOVERY)
+ if(myself->options & OPTION_PMTU_DISCOVERY)
c->options |= OPTION_PMTU_DISCOVERY;
get_config_int(lookup_config(c->config_tree, "Weight"), &c->estimated_weight);
return send_request(c, "%d %s %d %lx", ACK, myport, c->estimated_weight, c->options);
}
-static void send_everything(connection_t *c)
-{
- avl_node_t *node, *node2;
+static void send_everything(connection_t *c) {
+ splay_node_t *node, *node2;
node_t *n;
subnet_t *s;
edge_t *e;
}
}
-bool ack_h(connection_t *c)
-{
+bool ack_h(connection_t *c, char *request) {
char hisport[MAX_STRING_SIZE];
char *hisaddress, *dummy;
int weight, mtu;
cp();
- if(sscanf(c->buffer, "%*d " MAX_STRING " %d %lx", hisport, &weight, &options) != 3) {
+ if(sscanf(request, "%*d " MAX_STRING " %d %lx", hisport, &weight, &options) != 3) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ACK", c->name,
c->hostname);
return false;
} else {
if(n->connection) {
/* Oh dear, we already have a connection to this node. */
- ifdebug(CONNECTIONS) logger(LOG_DEBUG, _("Established a second connection with %s (%s), closing old connection"),
- n->name, n->hostname);
+ ifdebug(CONNECTIONS) logger(LOG_DEBUG, _("Established a second connection with %s (%s), closing old connection"), n->connection->name, n->connection->hostname);
+
+ if(n->connection->outgoing) {
+ if(c->outgoing)
+ logger(LOG_WARNING, _("Two outgoing connections to the same node!"));
+ else
+ c->outgoing = n->connection->outgoing;
+
+ n->connection->outgoing = NULL;
+ }
+
terminate_connection(n->connection, false);
/* Run graph algorithm to purge key and make sure up/down scripts are rerun with new IP addresses and stuff */
graph();
n->connection = c;
c->node = n;
+ if(!(c->options & options & OPTION_PMTU_DISCOVERY)) {
+ c->options &= ~OPTION_PMTU_DISCOVERY;
+ options &= ~OPTION_PMTU_DISCOVERY;
+ }
c->options |= options;
if(get_config_int(lookup_config(c->config_tree, "PMTU"), &mtu) && mtu < n->mtu)
/*
protocol_key.c -- handle the meta-protocol, key exchange
Copyright (C) 1999-2005 Ivo Timmermans,
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "system.h"
-#include <openssl/evp.h>
-#include <openssl/err.h>
-
-#include "avl_tree.h"
+#include "splay_tree.h"
+#include "cipher.h"
#include "connection.h"
#include "logger.h"
#include "net.h"
#include "utils.h"
#include "xalloc.h"
-bool mykeyused = false;
+static bool mykeyused = false;
-bool send_key_changed(connection_t *c, const node_t *n)
-{
+bool send_key_changed(connection_t *c, const node_t *n) {
cp();
/* Only send this message if some other daemon requested our key previously.
return send_request(c, "%d %lx %s", KEY_CHANGED, random(), n->name);
}
-bool key_changed_h(connection_t *c)
-{
+bool key_changed_h(connection_t *c, char *request) {
char name[MAX_STRING_SIZE];
node_t *n;
cp();
- if(sscanf(c->buffer, "%*d %*x " MAX_STRING, name) != 1) {
+ if(sscanf(request, "%*d %*x " MAX_STRING, name) != 1) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "KEY_CHANGED",
c->name, c->hostname);
return false;
}
- if(seen_request(c->buffer))
+ if(seen_request(request))
return true;
n = lookup_node(name);
/* Tell the others */
if(!tunnelserver)
- forward_request(c);
+ forward_request(c, request);
return true;
}
-bool send_req_key(connection_t *c, const node_t *from, const node_t *to)
-{
+bool send_req_key(connection_t *c, const node_t *from, const node_t *to) {
cp();
return send_request(c, "%d %s %s", REQ_KEY, from->name, to->name);
}
-bool req_key_h(connection_t *c)
-{
+bool req_key_h(connection_t *c, char *request) {
char from_name[MAX_STRING_SIZE];
char to_name[MAX_STRING_SIZE];
node_t *from, *to;
cp();
- if(sscanf(c->buffer, "%*d " MAX_STRING " " MAX_STRING, from_name, to_name) != 2) {
+ if(sscanf(request, "%*d " MAX_STRING " " MAX_STRING, from_name, to_name) != 2) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "REQ_KEY", c->name,
c->hostname);
return false;
if(to == myself) { /* Yes, send our own key back */
mykeyused = true;
from->received_seqno = 0;
- memset(from->late, 0, sizeof(from->late));
+ memset(from->late, 0, sizeof from->late);
send_ans_key(c, myself, from);
} else {
if(tunnelserver)
return true;
}
-bool send_ans_key(connection_t *c, const node_t *from, const node_t *to)
-{
- char *key;
+bool send_ans_key(connection_t *c, const node_t *from, const node_t *to) {
+ size_t keylen = cipher_keylength(&from->cipher);
+ char key[keylen * 2 + 1];
cp();
- key = alloca(2 * from->keylength + 1);
- bin2hex(from->key, key, from->keylength);
- key[from->keylength * 2] = '\0';
+ cipher_get_key(&from->cipher, key);
+ bin2hex(key, key, keylen);
+ key[keylen * 2] = '\0';
return send_request(c, "%d %s %s %s %d %d %d %d", ANS_KEY,
from->name, to->name, key,
- from->cipher ? from->cipher->nid : 0,
- from->digest ? from->digest->type : 0, from->maclength,
+ cipher_get_nid(&from->cipher),
+ digest_get_nid(&from->digest), from->maclength,
from->compression);
}
-bool ans_key_h(connection_t *c)
-{
+bool ans_key_h(connection_t *c, char *request) {
char from_name[MAX_STRING_SIZE];
char to_name[MAX_STRING_SIZE];
char key[MAX_STRING_SIZE];
cp();
- if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING" "MAX_STRING" %d %d %d %d",
+ if(sscanf(request, "%*d "MAX_STRING" "MAX_STRING" "MAX_STRING" %d %d %d %d",
from_name, to_name, key, &cipher, &digest, &maclength,
&compression) != 7) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ANS_KEY", c->name,
if(!to->status.reachable) {
logger(LOG_WARNING, _("Got %s from %s (%s) destination %s which is not reachable"),
- "ANS_KEY", c->name, c->hostname, to_name);
+ "ANS_KEY", c->name, c->hostname, to_name);
return true;
}
- return send_request(to->nexthop->connection, "%s", c->buffer);
+ return send_request(to->nexthop->connection, "%s", request);
}
- /* Update our copy of the origin's packet key */
-
- if(from->key)
- free(from->key);
-
- from->key = xstrdup(key);
- from->keylength = strlen(key) / 2;
- hex2bin(from->key, from->key, from->keylength);
- from->key[from->keylength] = '\0';
-
- from->status.validkey = true;
- from->status.waitingforkey = false;
- from->sent_seqno = 0;
-
/* Check and lookup cipher and digest algorithms */
- if(cipher) {
- from->cipher = EVP_get_cipherbynid(cipher);
-
- if(!from->cipher) {
- logger(LOG_ERR, _("Node %s (%s) uses unknown cipher!"), from->name,
- from->hostname);
- return false;
- }
+ if(!cipher_open_by_nid(&from->cipher, cipher)) {
+ logger(LOG_ERR, _("Node %s (%s) uses unknown cipher!"), from->name, from->hostname);
+ return false;
+ }
- if(from->keylength != from->cipher->key_len + from->cipher->iv_len) {
- logger(LOG_ERR, _("Node %s (%s) uses wrong keylength!"), from->name,
- from->hostname);
- return false;
- }
- } else {
- from->cipher = NULL;
+ if(strlen(key) / 2 != cipher_keylength(&from->cipher)) {
+ logger(LOG_ERR, _("Node %s (%s) uses wrong keylength!"), from->name, from->hostname);
+ return false;
}
from->maclength = maclength;
- if(digest) {
- from->digest = EVP_get_digestbynid(digest);
-
- if(!from->digest) {
- logger(LOG_ERR, _("Node %s (%s) uses unknown digest!"), from->name,
- from->hostname);
- return false;
- }
+ if(!digest_open_by_nid(&from->digest, digest)) {
+ logger(LOG_ERR, _("Node %s (%s) uses unknown digest!"), from->name, from->hostname);
+ return false;
+ }
- if(from->maclength > from->digest->md_size || from->maclength < 0) {
- logger(LOG_ERR, _("Node %s (%s) uses bogus MAC length!"),
- from->name, from->hostname);
- return false;
- }
- } else {
- from->digest = NULL;
+ if(from->maclength > digest_length(&from->digest) || from->maclength < 0) {
+ logger(LOG_ERR, _("Node %s (%s) uses bogus MAC length!"), from->name, from->hostname);
+ return false;
}
if(compression < 0 || compression > 11) {
from->compression = compression;
- if(from->cipher)
- if(!EVP_EncryptInit_ex(&from->packet_ctx, from->cipher, NULL, (unsigned char *)from->key, (unsigned char *)from->key + from->cipher->key_len)) {
- logger(LOG_ERR, _("Error during initialisation of key from %s (%s): %s"),
- from->name, from->hostname, ERR_error_string(ERR_get_error(), NULL));
- return false;
- }
+ /* Update our copy of the origin's packet key */
+
+ hex2bin(key, key, cipher_keylength(&from->cipher));
+ cipher_set_key(&from->cipher, key, false);
+
+ from->status.validkey = true;
+ from->status.waitingforkey = false;
+ from->sent_seqno = 0;
if(from->options & OPTION_PMTU_DISCOVERY && !from->mtuprobes)
send_mtu_probe(from);
- flush_queue(from);
-
return true;
}
return send_request(c, "%d %d %s", STATUS, statusno, statusstring);
}
-bool status_h(connection_t *c)
+bool status_h(connection_t *c, char *request)
{
int statusno;
char statusstring[MAX_STRING_SIZE];
cp();
- if(sscanf(c->buffer, "%*d %d " MAX_STRING, &statusno, statusstring) != 2) {
+ if(sscanf(request, "%*d %d " MAX_STRING, &statusno, statusstring) != 2) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "STATUS",
c->name, c->hostname);
return false;
return send_request(c, "%d %d %s", ERROR, err, errstring);
}
-bool error_h(connection_t *c)
+bool error_h(connection_t *c, char *request)
{
int err;
char errorstring[MAX_STRING_SIZE];
cp();
- if(sscanf(c->buffer, "%*d %d " MAX_STRING, &err, errorstring) != 2) {
+ if(sscanf(request, "%*d %d " MAX_STRING, &err, errorstring) != 2) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ERROR",
c->name, c->hostname);
return false;
ifdebug(ERROR) logger(LOG_NOTICE, _("Error message from %s (%s): %d: %s"),
c->name, c->hostname, err, errorstring);
- terminate_connection(c, c->status.active);
-
- return true;
+ return false;
}
bool send_termreq(connection_t *c)
return send_request(c, "%d", TERMREQ);
}
-bool termreq_h(connection_t *c)
+bool termreq_h(connection_t *c, char *request)
{
cp();
- terminate_connection(c, c->status.active);
-
- return true;
+ return false;
}
bool send_ping(connection_t *c)
cp();
c->status.pinged = true;
- c->last_ping_time = now;
+ c->last_ping_time = time(NULL);
return send_request(c, "%d", PING);
}
-bool ping_h(connection_t *c)
+bool ping_h(connection_t *c, char *request)
{
cp();
return send_request(c, "%d", PONG);
}
-bool pong_h(connection_t *c)
+bool pong_h(connection_t *c, char *request)
{
cp();
{
cp();
- /* If there already is a lot of data in the outbuf buffer, discard this packet. */
+ /* If there already is a lot of data in the outbuf buffer, discard this packet.
+ We use a very simple Random Early Drop algorithm. */
- if(c->buffer->output->off > maxoutbufsize)
- if(2.0 * c->outbuflen / (double)maxoutbufsize - 1 > drand48())
++ if(2.0 * c->buffer->output->off / (double)maxoutbufsize - 1 > drand48())
return true;
if(!send_request(c, "%d %hd", PACKET, packet->len))
return send_meta(c, (char *)packet->data, packet->len);
}
-bool tcppacket_h(connection_t *c)
+bool tcppacket_h(connection_t *c, char *request)
{
short int len;
cp();
- if(sscanf(c->buffer, "%*d %hd", &len) != 1) {
+ if(sscanf(request, "%*d %hd", &len) != 1) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "PACKET", c->name,
c->hostname);
return false;
/*
protocol_subnet.c -- handle the meta-protocol, subnets
Copyright (C) 1999-2005 Ivo Timmermans,
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
return send_request(c, "%d %lx %s %s", ADD_SUBNET, random(), subnet->owner->name, netstr);
}
-bool add_subnet_h(connection_t *c)
+bool add_subnet_h(connection_t *c, char *request)
{
char subnetstr[MAX_STRING_SIZE];
char name[MAX_STRING_SIZE];
cp();
- if(sscanf(c->buffer, "%*d %*x " MAX_STRING " " MAX_STRING, name, subnetstr) != 2) {
+ if(sscanf(request, "%*d %*x " MAX_STRING " " MAX_STRING, name, subnetstr) != 2) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ADD_SUBNET", c->name,
c->hostname);
return false;
return false;
}
- if(seen_request(c->buffer))
+ if(seen_request(request))
return true;
/* Check if the owner of the new subnet is in the connection list */
owner = lookup_node(name);
+ if(tunnelserver && owner != myself && owner != c->node) {
+ /* in case of tunnelserver, ignore indirect subnet registrations */
+ ifdebug(PROTOCOL) logger(LOG_WARNING, _("Ignoring indirect %s from %s (%s) for %s"),
+ "ADD_SUBNET", c->name, c->hostname, subnetstr);
+ return true;
+ }
+
if(!owner) {
owner = new_node();
owner->name = xstrdup(name);
node_add(owner);
}
- if(tunnelserver && owner != myself && owner != c->node)
- return false;
-
/* Check if we already know this subnet */
if(lookup_subnet(owner, &s))
/* Tell the rest */
if(!tunnelserver)
- forward_request(c);
+ forward_request(c, request);
return true;
}
return send_request(c, "%d %lx %s %s", DEL_SUBNET, random(), s->owner->name, netstr);
}
-bool del_subnet_h(connection_t *c)
+bool del_subnet_h(connection_t *c, char *request)
{
char subnetstr[MAX_STRING_SIZE];
char name[MAX_STRING_SIZE];
cp();
- if(sscanf(c->buffer, "%*d %*x " MAX_STRING " " MAX_STRING, name, subnetstr) != 2) {
+ if(sscanf(request, "%*d %*x " MAX_STRING " " MAX_STRING, name, subnetstr) != 2) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "DEL_SUBNET", c->name,
c->hostname);
return false;
return false;
}
- if(seen_request(c->buffer))
+ if(seen_request(request))
return true;
/* If everything is correct, delete the subnet from the list of the owner */
/* Tell the rest */
if(!tunnelserver)
- forward_request(c);
+ forward_request(c, request);
/* Finally, delete it. */
/*
device.c -- raw socket
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "logger.h"
#include "utils.h"
#include "route.h"
+ #include "xalloc.h"
int device_fd = -1;
- char *device;
- char *iface;
- char ifrname[IFNAMSIZ];
- char *device_info;
+ char *device = NULL;
+ char *iface = NULL;
+ static char ifrname[IFNAMSIZ];
+ static char *device_info;
static int device_total_in = 0;
static int device_total_out = 0;
-bool setup_device(void)
-{
+bool setup_device(void) {
struct ifreq ifr;
struct sockaddr_ll sa;
cp();
- if(!get_config_string
- (lookup_config(config_tree, "Interface"), &iface))
- iface = "eth0";
+ if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
+ iface = xstrdup("eth0");
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
- device = iface;
+ device = xstrdup(iface);
device_info = _("raw socket");
return false;
}
- memset(&ifr, 0, sizeof(ifr));
+ memset(&ifr, 0, sizeof ifr);
strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
close(device_fd);
return false;
}
- memset(&sa, '0', sizeof(sa));
+ memset(&sa, '0', sizeof sa);
sa.sll_family = AF_PACKET;
sa.sll_protocol = htons(ETH_P_ALL);
sa.sll_ifindex = ifr.ifr_ifindex;
- if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof(sa))) {
+ if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof sa)) {
logger(LOG_ERR, _("Could not bind %s to %s: %s"), device, iface, strerror(errno));
return false;
}
return true;
}
-void close_device(void)
-{
+void close_device(void) {
cp();
close(device_fd);
+
+ free(device);
+ free(iface);
}
-bool read_packet(vpn_packet_t *packet)
-{
- int lenin;
+bool read_packet(vpn_packet_t *packet) {
+ int inlen;
cp();
- if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
+ if((inlen = read(device_fd, packet->data, MTU)) <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
}
- packet->len = lenin;
+ packet->len = inlen;
device_total_in += packet->len;
return true;
}
-bool write_packet(vpn_packet_t *packet)
-{
+bool write_packet(vpn_packet_t *packet) {
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
return true;
}
-void dump_device_stats(void)
-{
+void dump_device_stats(void) {
cp();
logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
/*
route.c -- routing
Copyright (C) 2000-2005 Ivo Timmermans,
- 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "system.h"
-#include "avl_tree.h"
+#include "splay_tree.h"
#include "connection.h"
#include "ethernet.h"
#include "ipv4.h"
static const size_t ns_size = sizeof(struct nd_neighbor_solicit);
static const size_t opt_size = sizeof(struct nd_opt_hdr);
+static struct event age_subnets_event;
+
/* RFC 1071 */
static uint16_t inet_checksum(void *data, int len, uint16_t prevsum)
static bool ratelimit(int frequency) {
static time_t lasttime = 0;
static int count = 0;
+ time_t now = time(NULL);
if(lasttime == now) {
if(++count > frequency)
return true;
}
+static void age_subnets(int fd, short events, void *data)
+{
+ subnet_t *s;
+ connection_t *c;
+ splay_node_t *node, *next, *node2;
+ bool left = false;
+ time_t now = time(NULL);
+
+ cp();
+
+ for(node = myself->subnet_tree->head; node; node = next) {
+ next = node->next;
+ s = node->data;
+ if(s->expires && s->expires < now) {
+ ifdebug(TRAFFIC) {
+ char netstr[MAXNETSTR];
+ if(net2str(netstr, sizeof netstr, s))
+ logger(LOG_INFO, _("Subnet %s expired"), netstr);
+ }
+
+ for(node2 = connection_tree->head; node2; node2 = node2->next) {
+ c = node2->data;
+ if(c->status.active)
+ send_del_subnet(c, s);
+ }
+
+ subnet_del(myself, s);
+ } else {
+ if(s->expires)
+ left = true;
+ }
+ }
+
+ if(left)
+ event_add(&age_subnets_event, &(struct timeval){10, 0});
+}
+
static void learn_mac(mac_t *address)
{
subnet_t *subnet;
- avl_node_t *node;
+ splay_node_t *node;
connection_t *c;
cp();
subnet = new_subnet();
subnet->type = SUBNET_MAC;
- subnet->expires = now + macexpire;
+ subnet->expires = time(NULL) + macexpire;
subnet->net.mac.address = *address;
subnet_add(myself, subnet);
if(c->status.active)
send_add_subnet(c, subnet);
}
- }
-
- if(subnet->expires)
- subnet->expires = now + macexpire;
-}
-
-void age_subnets(void)
-{
- subnet_t *s;
- connection_t *c;
- avl_node_t *node, *next, *node2;
- cp();
-
- for(node = myself->subnet_tree->head; node; node = next) {
- next = node->next;
- s = node->data;
- if(s->expires && s->expires < now) {
- ifdebug(TRAFFIC) {
- char netstr[MAXNETSTR];
- if(net2str(netstr, sizeof netstr, s))
- logger(LOG_INFO, _("Subnet %s expired"), netstr);
- }
-
- for(node2 = connection_tree->head; node2; node2 = node2->next) {
- c = node2->data;
- if(c->status.active)
- send_del_subnet(c, s);
- }
-
- subnet_del(myself, s);
- }
+ if(!timeout_initialized(&age_subnets_event))
+ timeout_set(&age_subnets_event, age_subnets, NULL);
+ event_add(&age_subnets_event, &(struct timeval){10, 0});
+ } else {
+ if(subnet->expires)
+ subnet->expires = time(NULL) + macexpire;
}
}
if(!checklength(source, packet, ether_size + ip_size))
return;
- route_ipv4_unicast(source, packet);
+ if(((packet->data[30] & 0xf0) == 0xe0) || (
+ packet->data[30] == 255 &&
+ packet->data[31] == 255 &&
+ packet->data[32] == 255 &&
+ packet->data[33] == 255))
+ broadcast_packet(source, packet);
+ else
+ route_ipv4_unicast(source, packet);
}
/* RFC 2463 */
/* Generate checksum */
- checksum = inet_checksum(&pseudo, sizeof(pseudo), ~0);
+ checksum = inet_checksum(&pseudo, sizeof pseudo, ~0);
checksum = inet_checksum(&icmp6, icmp6_size, checksum);
checksum = inet_checksum(packet->data + ether_size + ip6_size + icmp6_size, ntohl(pseudo.length) - icmp6_size, checksum);
struct nd_opt_hdr opt;
subnet_t *subnet;
uint16_t checksum;
+ bool has_opt;
struct {
struct in6_addr ip6_src; /* source address */
cp();
- if(!checklength(source, packet, ether_size + ip6_size + ns_size + opt_size + ETH_ALEN))
+ if(!checklength(source, packet, ether_size + ip6_size + ns_size))
return;
+ has_opt = packet->len >= ether_size + ip6_size + ns_size + opt_size + ETH_ALEN;
+
if(source != myself) {
ifdebug(TRAFFIC) logger(LOG_WARNING, _("Got neighbor solicitation request from %s (%s) while in router mode!"), source->name, source->hostname);
return;
memcpy(&ip6, packet->data + ether_size, ip6_size);
memcpy(&ns, packet->data + ether_size + ip6_size, ns_size);
- memcpy(&opt, packet->data + ether_size + ip6_size + ns_size, opt_size);
+ if(has_opt)
+ memcpy(&opt, packet->data + ether_size + ip6_size + ns_size, opt_size);
/* First, snatch the source address from the neighbor solicitation packet */
/* Check if this is a valid neighbor solicitation request */
if(ns.nd_ns_hdr.icmp6_type != ND_NEIGHBOR_SOLICIT ||
- opt.nd_opt_type != ND_OPT_SOURCE_LINKADDR) {
+ (has_opt && opt.nd_opt_type != ND_OPT_SOURCE_LINKADDR)) {
ifdebug(TRAFFIC) logger(LOG_WARNING, _("Cannot route packet: received unknown type neighbor solicitation request"));
return;
}
pseudo.ip6_src = ip6.ip6_src;
pseudo.ip6_dst = ip6.ip6_dst;
- pseudo.length = htonl(ns_size + opt_size + ETH_ALEN);
+ if(has_opt)
+ pseudo.length = htonl(ns_size + opt_size + ETH_ALEN);
+ else
+ pseudo.length = htonl(ns_size);
pseudo.next = htonl(IPPROTO_ICMPV6);
/* Generate checksum */
- checksum = inet_checksum(&pseudo, sizeof(pseudo), ~0);
+ checksum = inet_checksum(&pseudo, sizeof pseudo, ~0);
checksum = inet_checksum(&ns, ns_size, checksum);
- checksum = inet_checksum(&opt, opt_size, checksum);
- checksum = inet_checksum(packet->data + ether_size + ip6_size + ns_size + opt_size, ETH_ALEN, checksum);
+ if(has_opt) {
+ checksum = inet_checksum(&opt, opt_size, checksum);
+ checksum = inet_checksum(packet->data + ether_size + ip6_size + ns_size + opt_size, ETH_ALEN, checksum);
+ }
if(checksum) {
ifdebug(TRAFFIC) logger(LOG_WARNING, _("Cannot route packet: checksum error for neighbor solicitation request"));
ip6.ip6_dst = ip6.ip6_src; /* swap destination and source protocoll address */
ip6.ip6_src = ns.nd_ns_target;
- memcpy(packet->data + ether_size + ip6_size + ns_size + opt_size, packet->data + ETH_ALEN, ETH_ALEN); /* add fake source hard addr */
+ if(has_opt)
+ memcpy(packet->data + ether_size + ip6_size + ns_size + opt_size, packet->data + ETH_ALEN, ETH_ALEN); /* add fake source hard addr */
ns.nd_ns_cksum = 0;
ns.nd_ns_type = ND_NEIGHBOR_ADVERT;
pseudo.ip6_src = ip6.ip6_src;
pseudo.ip6_dst = ip6.ip6_dst;
- pseudo.length = htonl(ns_size + opt_size + ETH_ALEN);
+ if(has_opt)
+ pseudo.length = htonl(ns_size + opt_size + ETH_ALEN);
+ else
+ pseudo.length = htonl(ns_size);
pseudo.next = htonl(IPPROTO_ICMPV6);
/* Generate checksum */
- checksum = inet_checksum(&pseudo, sizeof(pseudo), ~0);
+ checksum = inet_checksum(&pseudo, sizeof pseudo, ~0);
checksum = inet_checksum(&ns, ns_size, checksum);
- checksum = inet_checksum(&opt, opt_size, checksum);
- checksum = inet_checksum(packet->data + ether_size + ip6_size + ns_size + opt_size, ETH_ALEN, checksum);
+ if(has_opt) {
+ checksum = inet_checksum(&opt, opt_size, checksum);
+ checksum = inet_checksum(packet->data + ether_size + ip6_size + ns_size + opt_size, ETH_ALEN, checksum);
+ }
ns.nd_ns_hdr.icmp6_cksum = checksum;
memcpy(packet->data + ether_size, &ip6, ip6_size);
memcpy(packet->data + ether_size + ip6_size, &ns, ns_size);
- memcpy(packet->data + ether_size + ip6_size + ns_size, &opt, opt_size);
+ if(has_opt)
+ memcpy(packet->data + ether_size + ip6_size + ns_size, &opt, opt_size);
send_packet(source, packet);
}
return;
}
- route_ipv6_unicast(source, packet);
+ if(packet->data[38] == 255)
+ broadcast_packet(source, packet);
+ else
+ route_ipv6_unicast(source, packet);
}
/* RFC 826 */
/* Check if this is a valid ARP request */
if(ntohs(arp.arp_hrd) != ARPHRD_ETHER || ntohs(arp.arp_pro) != ETH_P_IP ||
- arp.arp_hln != ETH_ALEN || arp.arp_pln != sizeof(addr) || ntohs(arp.arp_op) != ARPOP_REQUEST) {
+ arp.arp_hln != ETH_ALEN || arp.arp_pln != sizeof addr || ntohs(arp.arp_op) != ARPOP_REQUEST) {
ifdebug(TRAFFIC) logger(LOG_WARNING, _("Cannot route packet: received unknown type ARP request"));
return;
}
memcpy(packet->data, packet->data + ETH_ALEN, ETH_ALEN); /* copy destination address */
packet->data[ETH_ALEN * 2 - 1] ^= 0xFF; /* mangle source address so it looks like it's not from us */
- memcpy(&addr, arp.arp_tpa, sizeof(addr)); /* save protocol addr */
- memcpy(arp.arp_tpa, arp.arp_spa, sizeof(addr)); /* swap destination and source protocol address */
- memcpy(arp.arp_spa, &addr, sizeof(addr)); /* ... */
+ memcpy(&addr, arp.arp_tpa, sizeof addr); /* save protocol addr */
+ memcpy(arp.arp_tpa, arp.arp_spa, sizeof addr); /* swap destination and source protocol address */
+ memcpy(arp.arp_spa, &addr, sizeof addr); /* ... */
memcpy(arp.arp_tha, arp.arp_sha, ETH_ALEN); /* set target hard/proto addr */
memcpy(arp.arp_sha, packet->data + ETH_ALEN, ETH_ALEN); /* add fake source hard addr */
/*
device.c -- Interaction with Solaris tun device
Copyright (C) 2001-2005 Ivo Timmermans,
- 2001-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2001-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "logger.h"
#include "net.h"
#include "utils.h"
+ #include "xalloc.h"
#define DEFAULT_DEVICE "/dev/tun"
int device_fd = -1;
char *device = NULL;
char *iface = NULL;
- char *device_info = NULL;
+ static char *device_info = NULL;
static int device_total_in = 0;
static int device_total_out = 0;
-bool setup_device(void)
-{
+bool setup_device(void) {
int ip_fd = -1, if_fd = -1;
int ppa;
char *ptr;
cp();
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
- device = DEFAULT_DEVICE;
+ device = xstrdup(DEFAULT_DEVICE);
if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
return true;
}
-void close_device(void)
-{
+void close_device(void) {
cp();
close(device_fd);
+
+ free(device);
+ free(iface);
}
-bool read_packet(vpn_packet_t *packet)
-{
- int lenin;
+bool read_packet(vpn_packet_t *packet) {
+ int inlen;
cp();
- if((lenin = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
+ if((inlen = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
return false;
}
- packet->len = lenin + 14;
+ packet->len = inlen + 14;
device_total_in += packet->len;
return true;
}
-bool write_packet(vpn_packet_t *packet)
-{
+bool write_packet(vpn_packet_t *packet) {
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
return true;
}
-void dump_device_stats(void)
-{
+void dump_device_stats(void) {
cp();
logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
/*
subnet.c -- handle subnet lookups and lists
- Copyright (C) 2000-2006 Guus Sliepen <guus@tinc-vpn.org>,
+ Copyright (C) 2000-2009 Guus Sliepen <guus@tinc-vpn.org>,
2000-2005 Ivo Timmermans
This program is free software; you can redistribute it and/or modify
#include "system.h"
-#include "avl_tree.h"
+#include "splay_tree.h"
#include "device.h"
#include "logger.h"
#include "net.h"
/* lists type of subnet */
-avl_tree_t *subnet_tree;
+splay_tree_t *subnet_tree;
+ /* Subnet lookup cache */
+
+ static ipv4_t cache_ipv4_address[2];
+ static subnet_t *cache_ipv4_subnet[2];
+ static bool cache_ipv4_valid[2];
+ static int cache_ipv4_slot;
+
+ static ipv6_t cache_ipv6_address[2];
+ static subnet_t *cache_ipv6_subnet[2];
+ static bool cache_ipv6_valid[2];
+ static int cache_ipv6_slot;
+
+ void subnet_cache_flush() {
+ cache_ipv4_valid[0] = cache_ipv4_valid[1] = false;
+ cache_ipv6_valid[0] = cache_ipv6_valid[1] = false;
+ }
+
/* Subnet comparison */
static int subnet_compare_mac(const subnet_t *a, const subnet_t *b)
{
int result;
- result = memcmp(&a->net.mac.address, &b->net.mac.address, sizeof(mac_t));
+ result = memcmp(&a->net.mac.address, &b->net.mac.address, sizeof a->net.mac.address);
+ if(result)
+ return result;
+
+ result = a->weight - b->weight;
+
if(result || !a->owner || !b->owner)
return result;
{
int result;
- result = memcmp(&a->net.ipv4.address, &b->net.ipv4.address, sizeof a->net.ipv4.address);
+ result = b->net.ipv4.prefixlength - a->net.ipv4.prefixlength;
if(result)
return result;
- result = a->net.ipv4.prefixlength - b->net.ipv4.prefixlength;
+ result = memcmp(&a->net.ipv4.address, &b->net.ipv4.address, sizeof(ipv4_t));
+
+ if(result)
+ return result;
+
+ result = a->weight - b->weight;
if(result || !a->owner || !b->owner)
return result;
{
int result;
- result = memcmp(&a->net.ipv6.address, &b->net.ipv6.address, sizeof a->net.ipv6.address);
+ result = b->net.ipv6.prefixlength - a->net.ipv6.prefixlength;
if(result)
return result;
+
+ result = memcmp(&a->net.ipv6.address, &b->net.ipv6.address, sizeof(ipv6_t));
- result = a->net.ipv6.prefixlength - b->net.ipv6.prefixlength;
+ if(result)
+ return result;
+
+ result = a->weight - b->weight;
if(result || !a->owner || !b->owner)
return result;
{
cp();
- subnet_tree = avl_alloc_tree((avl_compare_t) subnet_compare, (avl_action_t) free_subnet);
+ subnet_tree = splay_alloc_tree((splay_compare_t) subnet_compare, (splay_action_t) free_subnet);
+
+ subnet_cache_flush();
}
void exit_subnets(void)
{
cp();
- avl_delete_tree(subnet_tree);
+ splay_delete_tree(subnet_tree);
}
-avl_tree_t *new_subnet_tree(void)
+splay_tree_t *new_subnet_tree(void)
{
cp();
- return avl_alloc_tree((avl_compare_t) subnet_compare, NULL);
+ return splay_alloc_tree((splay_compare_t) subnet_compare, NULL);
}
-void free_subnet_tree(avl_tree_t *subnet_tree)
+void free_subnet_tree(splay_tree_t *subnet_tree)
{
cp();
- avl_delete_tree(subnet_tree);
+ splay_delete_tree(subnet_tree);
}
/* Allocating and freeing space for subnets */
subnet->owner = n;
- avl_insert(subnet_tree, subnet);
- avl_insert(n->subnet_tree, subnet);
+ splay_insert(subnet_tree, subnet);
+ splay_insert(n->subnet_tree, subnet);
+
+ subnet_cache_flush();
}
void subnet_del(node_t *n, subnet_t *subnet)
{
cp();
- avl_delete(n->subnet_tree, subnet);
- avl_delete(subnet_tree, subnet);
+ splay_delete(n->subnet_tree, subnet);
+ splay_delete(subnet_tree, subnet);
+
+ subnet_cache_flush();
}
/* Ascii representation of subnets */
{
int i, l;
uint16_t x[8];
+ int weight = 10;
cp();
- if(sscanf(subnetstr, "%hu.%hu.%hu.%hu/%d",
- &x[0], &x[1], &x[2], &x[3], &l) == 5) {
+ if(sscanf(subnetstr, "%hu.%hu.%hu.%hu/%d#%d",
+ &x[0], &x[1], &x[2], &x[3], &l, &weight) >= 5) {
if(l < 0 || l > 32)
return false;
subnet->type = SUBNET_IPV4;
subnet->net.ipv4.prefixlength = l;
+ subnet->weight = weight;
for(i = 0; i < 4; i++) {
if(x[i] > 255)
return true;
}
- if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d",
+ if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d#%d",
&x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &x[6], &x[7],
- &l) == 9) {
+ &l, &weight) >= 9) {
if(l < 0 || l > 128)
return false;
subnet->type = SUBNET_IPV6;
subnet->net.ipv6.prefixlength = l;
+ subnet->weight = weight;
for(i = 0; i < 8; i++)
subnet->net.ipv6.address.x[i] = htons(x[i]);
return true;
}
- if(sscanf(subnetstr, "%hu.%hu.%hu.%hu", &x[0], &x[1], &x[2], &x[3]) == 4) {
+ if(sscanf(subnetstr, "%hu.%hu.%hu.%hu#%d", &x[0], &x[1], &x[2], &x[3], &weight) >= 4) {
subnet->type = SUBNET_IPV4;
subnet->net.ipv4.prefixlength = 32;
+ subnet->weight = weight;
for(i = 0; i < 4; i++) {
if(x[i] > 255)
return true;
}
- if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx",
- &x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &x[6], &x[7]) == 8) {
+ if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx#%d",
+ &x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &x[6], &x[7], &weight) >= 8) {
subnet->type = SUBNET_IPV6;
subnet->net.ipv6.prefixlength = 128;
+ subnet->weight = weight;
for(i = 0; i < 8; i++)
subnet->net.ipv6.address.x[i] = htons(x[i]);
return true;
}
- if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx",
- &x[0], &x[1], &x[2], &x[3], &x[4], &x[5]) == 6) {
+ if(sscanf(subnetstr, "%hx:%hx:%hx:%hx:%hx:%hx#%d",
+ &x[0], &x[1], &x[2], &x[3], &x[4], &x[5], &weight) >= 6) {
subnet->type = SUBNET_MAC;
+ subnet->weight = weight;
for(i = 0; i < 6; i++)
subnet->net.mac.address.x[i] = x[i];
switch (subnet->type) {
case SUBNET_MAC:
- snprintf(netstr, len, "%hx:%hx:%hx:%hx:%hx:%hx",
+ snprintf(netstr, len, "%hx:%hx:%hx:%hx:%hx:%hx#%d",
subnet->net.mac.address.x[0],
subnet->net.mac.address.x[1],
subnet->net.mac.address.x[2],
subnet->net.mac.address.x[3],
- subnet->net.mac.address.x[4], subnet->net.mac.address.x[5]);
+ subnet->net.mac.address.x[4],
+ subnet->net.mac.address.x[5],
+ subnet->weight);
break;
case SUBNET_IPV4:
- snprintf(netstr, len, "%hu.%hu.%hu.%hu/%d",
+ snprintf(netstr, len, "%hu.%hu.%hu.%hu/%d#%d",
subnet->net.ipv4.address.x[0],
subnet->net.ipv4.address.x[1],
subnet->net.ipv4.address.x[2],
- subnet->net.ipv4.address.x[3], subnet->net.ipv4.prefixlength);
+ subnet->net.ipv4.address.x[3],
+ subnet->net.ipv4.prefixlength,
+ subnet->weight);
break;
case SUBNET_IPV6:
- snprintf(netstr, len, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d",
+ snprintf(netstr, len, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%d#%d",
ntohs(subnet->net.ipv6.address.x[0]),
ntohs(subnet->net.ipv6.address.x[1]),
ntohs(subnet->net.ipv6.address.x[2]),
ntohs(subnet->net.ipv6.address.x[5]),
ntohs(subnet->net.ipv6.address.x[6]),
ntohs(subnet->net.ipv6.address.x[7]),
- subnet->net.ipv6.prefixlength);
+ subnet->net.ipv6.prefixlength,
+ subnet->weight);
break;
default:
{
cp();
- return avl_search(owner->subnet_tree, subnet);
+ return splay_search(owner->subnet_tree, subnet);
}
subnet_t *lookup_subnet_mac(const mac_t *address)
subnet.net.mac.address = *address;
subnet.owner = NULL;
- p = avl_search(subnet_tree, &subnet);
+ p = splay_search(subnet_tree, &subnet);
return p;
}
subnet_t *lookup_subnet_ipv4(const ipv4_t *address)
{
- subnet_t *p, subnet = {0};
+ subnet_t *p, *r = NULL, subnet = {0};
- avl_node_t *n;
++ splay_node_t *n;
+ int i;
cp();
+ // Check if this address is cached
+
+ for(i = 0; i < 2; i++) {
+ if(!cache_ipv4_valid[i])
+ continue;
+ if(!memcmp(address, &cache_ipv4_address[i], sizeof *address))
+ return cache_ipv4_subnet[i];
+ }
+
+ // Search all subnets for a matching one
+
subnet.type = SUBNET_IPV4;
subnet.net.ipv4.address = *address;
subnet.net.ipv4.prefixlength = 32;
subnet.owner = NULL;
- do {
- /* Go find subnet */
+ for(n = subnet_tree->head; n; n = n->next) {
+ p = n->data;
+
+ if(!p || p->type != subnet.type)
+ continue;
- p = splay_search_closest_smaller(subnet_tree, &subnet);
-
- /* Check if the found subnet REALLY matches */
-
- if(p) {
- if(p->type != SUBNET_IPV4) {
- p = NULL;
- break;
- }
-
- if(!maskcmp(address, &p->net.ipv4.address, p->net.ipv4.prefixlength))
+ if(!maskcmp(address, &p->net.ipv4.address, p->net.ipv4.prefixlength)) {
+ r = p;
+ if(p->owner->status.reachable)
break;
- else {
- /* Otherwise, see if there is a bigger enclosing subnet */
-
- subnet.net.ipv4.prefixlength = p->net.ipv4.prefixlength - 1;
- if(subnet.net.ipv4.prefixlength < 0 || subnet.net.ipv4.prefixlength > 32)
- return NULL;
- maskcpy(&subnet.net.ipv4.address, &p->net.ipv4.address, subnet.net.ipv4.prefixlength, sizeof subnet.net.ipv4.address);
- }
}
- } while(p);
+ }
- return p;
+ // Cache the result
+
+ cache_ipv4_slot = !cache_ipv4_slot;
+ memcpy(&cache_ipv4_address[cache_ipv4_slot], address, sizeof *address);
+ cache_ipv4_subnet[cache_ipv4_slot] = r;
+ cache_ipv4_valid[cache_ipv4_slot] = true;
+
+ return r;
}
subnet_t *lookup_subnet_ipv6(const ipv6_t *address)
{
- subnet_t *p, subnet = {0};
+ subnet_t *p, *r = NULL, subnet = {0};
- avl_node_t *n;
++ splay_node_t *n;
+ int i;
cp();
+ // Check if this address is cached
+
+ for(i = 0; i < 2; i++) {
+ if(!cache_ipv6_valid[i])
+ continue;
+ if(!memcmp(address, &cache_ipv6_address[i], sizeof *address))
+ return cache_ipv6_subnet[i];
+ }
+
+ // Search all subnets for a matching one
+
subnet.type = SUBNET_IPV6;
subnet.net.ipv6.address = *address;
subnet.net.ipv6.prefixlength = 128;
subnet.owner = NULL;
- do {
- /* Go find subnet */
-
- p = splay_search_closest_smaller(subnet_tree, &subnet);
-
- /* Check if the found subnet REALLY matches */
+ for(n = subnet_tree->head; n; n = n->next) {
+ p = n->data;
+
+ if(!p || p->type != subnet.type)
+ continue;
- if(p) {
- if(p->type != SUBNET_IPV6)
- return NULL;
-
- if(!maskcmp(address, &p->net.ipv6.address, p->net.ipv6.prefixlength))
+ if(!maskcmp(address, &p->net.ipv6.address, p->net.ipv6.prefixlength)) {
+ r = p;
+ if(p->owner->status.reachable)
break;
- else {
- /* Otherwise, see if there is a bigger enclosing subnet */
-
- subnet.net.ipv6.prefixlength = p->net.ipv6.prefixlength - 1;
- if(subnet.net.ipv6.prefixlength < 0 || subnet.net.ipv6.prefixlength > 128)
- return NULL;
- maskcpy(&subnet.net.ipv6.address, &p->net.ipv6.address, subnet.net.ipv6.prefixlength, sizeof subnet.net.ipv6.address);
- }
}
- } while(p);
+ }
- return p;
+ // Cache the result
+
+ cache_ipv6_slot = !cache_ipv6_slot;
+ memcpy(&cache_ipv6_address[cache_ipv6_slot], address, sizeof *address);
+ cache_ipv6_subnet[cache_ipv6_slot] = r;
+ cache_ipv6_valid[cache_ipv6_slot] = true;
+
+ return r;
}
void subnet_update(node_t *owner, subnet_t *subnet, bool up) {
- avl_node_t *node;
+ splay_node_t *node;
int i;
char *envp[8];
char netstr[MAXNETSTR + 7] = "SUBNET=";
}
}
-void dump_subnets(void)
+int dump_subnets(struct evbuffer *out)
{
char netstr[MAXNETSTR];
subnet_t *subnet;
- avl_node_t *node;
+ splay_node_t *node;
cp();
- logger(LOG_DEBUG, _("Subnet list:"));
-
for(node = subnet_tree->head; node; node = node->next) {
subnet = node->data;
if(!net2str(netstr, sizeof netstr, subnet))
continue;
- logger(LOG_DEBUG, _(" %s owner %s"), netstr, subnet->owner->name);
+ if(evbuffer_add_printf(out, _(" %s owner %s\n"),
+ netstr, subnet->owner->name) == -1)
+ return errno;
}
- logger(LOG_DEBUG, _("End of subnet list."));
+ return 0;
}
/*
subnet.h -- header for subnet.c
- Copyright (C) 2000-2006 Guus Sliepen <guus@tinc-vpn.org>,
+ Copyright (C) 2000-2009 Guus Sliepen <guus@tinc-vpn.org>,
2000-2005 Ivo Timmermans
This program is free software; you can redistribute it and/or modify
subnet_type_t type; /* subnet type (IPv4? IPv6? MAC? something even weirder?) */
time_t expires; /* expiry time */
+ int weight; /* weight (higher value is higher priority) */
/* And now for the actual subnet: */
extern void free_subnet(subnet_t *);
extern void init_subnets(void);
extern void exit_subnets(void);
-extern avl_tree_t *new_subnet_tree(void) __attribute__ ((__malloc__));
-extern void free_subnet_tree(avl_tree_t *);
+extern splay_tree_t *new_subnet_tree(void) __attribute__ ((__malloc__));
+extern void free_subnet_tree(splay_tree_t *);
extern void subnet_add(struct node_t *, subnet_t *);
extern void subnet_del(struct node_t *, subnet_t *);
extern void subnet_update(struct node_t *, subnet_t *, bool);
extern subnet_t *lookup_subnet_mac(const mac_t *);
extern subnet_t *lookup_subnet_ipv4(const ipv4_t *);
extern subnet_t *lookup_subnet_ipv6(const ipv6_t *);
-extern void dump_subnets(void);
+extern int dump_subnets(struct evbuffer *);
+ extern void subnet_cache_flush(void);
#endif /* __TINC_SUBNET_H__ */
/*
tincd.c -- the main file for tincd
Copyright (C) 1998-2005 Ivo Timmermans
- 2000-2007 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <sys/mman.h>
#endif
-#include <openssl/rand.h>
-#include <openssl/rsa.h>
-#include <openssl/pem.h>
-#include <openssl/evp.h>
-#include <openssl/engine.h>
-
#include LZO1X_H
#include <getopt.h>
-#include "pidfile.h"
#include "conf.h"
+#include "control.h"
+#include "crypto.h"
#include "device.h"
#include "logger.h"
#include "net.h"
/* If nonzero, print the version on standard output and exit. */
bool show_version = false;
-/* If nonzero, it will attempt to kill a running tincd and exit. */
-int kill_tincd = 0;
-
-/* If nonzero, generate public/private keypair for this host/net. */
-int generate_keys = 0;
-
/* If nonzero, use null ciphers and skip all key exchanges. */
bool bypass_security = false;
bool use_logfile = false;
char *identname = NULL; /* program name for syslog */
-char *pidfilename = NULL; /* pid file location */
+char *controlsocketname = NULL; /* control socket location */
char *logfilename = NULL; /* log file location */
char **g_argv; /* a copy of the cmdline arguments */
static struct option const long_options[] = {
{"config", required_argument, NULL, 'c'},
- {"kill", optional_argument, NULL, 'k'},
{"net", required_argument, NULL, 'n'},
{"help", no_argument, NULL, 1},
{"version", no_argument, NULL, 2},
{"no-detach", no_argument, NULL, 'D'},
- {"generate-keys", optional_argument, NULL, 'K'},
{"debug", optional_argument, NULL, 'd'},
{"bypass-security", no_argument, NULL, 3},
{"mlock", no_argument, NULL, 'L'},
{"logfile", optional_argument, NULL, 4},
- {"pidfile", required_argument, NULL, 5},
+ {"controlsocket", required_argument, NULL, 5},
{NULL, 0, NULL, 0}
};
program_name);
else {
printf(_("Usage: %s [option]...\n\n"), program_name);
- printf(_(" -c, --config=DIR Read configuration options from DIR.\n"
- " -D, --no-detach Don't fork and detach.\n"
- " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
- " -k, --kill[=SIGNAL] Attempt to kill a running tincd and exit.\n"
- " -n, --net=NETNAME Connect to net NETNAME.\n"
- " -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
- " -L, --mlock Lock tinc into main memory.\n"
- " --logfile[=FILENAME] Write log entries to a logfile.\n"
- " --pidfile=FILENAME Write PID to FILENAME.\n"
- " --help Display this help and exit.\n"
- " --version Output version information and exit.\n\n"));
+ printf(_( " -c, --config=DIR Read configuration options from DIR.\n"
+ " -D, --no-detach Don't fork and detach.\n"
+ " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
+ " -n, --net=NETNAME Connect to net NETNAME.\n"
+ " -L, --mlock Lock tinc into main memory.\n"
+ " --logfile[=FILENAME] Write log entries to a logfile.\n"
+ " --controlsocket=FILENAME Open control socket at FILENAME.\n"
+ " --bypass-security Disables meta protocol security, for debugging.\n"
+ " --help Display this help and exit.\n"
+ " --version Output version information and exit.\n\n"));
printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
}
}
int r;
int option_index = 0;
- while((r = getopt_long(argc, argv, "c:DLd::k::n:K::", long_options, &option_index)) != EOF) {
+ while((r = getopt_long(argc, argv, "c:DLd::n:", long_options, &option_index)) != EOF) {
switch (r) {
case 0: /* long option */
break;
debug_level++;
break;
- case 'k': /* kill old tincds */
-#ifndef HAVE_MINGW
- if(optarg) {
- if(!strcasecmp(optarg, "HUP"))
- kill_tincd = SIGHUP;
- else if(!strcasecmp(optarg, "TERM"))
- kill_tincd = SIGTERM;
- else if(!strcasecmp(optarg, "KILL"))
- kill_tincd = SIGKILL;
- else if(!strcasecmp(optarg, "USR1"))
- kill_tincd = SIGUSR1;
- else if(!strcasecmp(optarg, "USR2"))
- kill_tincd = SIGUSR2;
- else if(!strcasecmp(optarg, "WINCH"))
- kill_tincd = SIGWINCH;
- else if(!strcasecmp(optarg, "INT"))
- kill_tincd = SIGINT;
- else if(!strcasecmp(optarg, "ALRM"))
- kill_tincd = SIGALRM;
- else {
- kill_tincd = atoi(optarg);
-
- if(!kill_tincd) {
- fprintf(stderr, _("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"),
- optarg);
- usage(true);
- return false;
- }
- }
- } else
- kill_tincd = SIGTERM;
-#else
- kill_tincd = 1;
-#endif
- break;
-
case 'n': /* net name given */
netname = xstrdup(optarg);
break;
- case 'K': /* generate public/private keypair */
- if(optarg) {
- generate_keys = atoi(optarg);
-
- if(generate_keys < 512) {
- fprintf(stderr, _("Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n"),
- optarg);
- usage(true);
- return false;
- }
-
- generate_keys &= ~7; /* Round it to bytes */
- } else
- generate_keys = 1024;
- break;
-
case 1: /* show help */
show_help = true;
break;
logfilename = xstrdup(optarg);
break;
- case 5: /* write PID to a file */
- pidfilename = xstrdup(optarg);
+ case 5: /* open control socket here */
+ controlsocketname = xstrdup(optarg);
break;
case '?':
return true;
}
-/* This function prettyprints the key generation process */
-
-static void indicator(int a, int b, void *p)
-{
- switch (a) {
- case 0:
- fprintf(stderr, ".");
- break;
-
- case 1:
- fprintf(stderr, "+");
- break;
-
- case 2:
- fprintf(stderr, "-");
- break;
-
- case 3:
- switch (b) {
- case 0:
- fprintf(stderr, " p\n");
- break;
-
- case 1:
- fprintf(stderr, " q\n");
- break;
-
- default:
- fprintf(stderr, "?");
- }
- break;
-
- default:
- fprintf(stderr, "?");
- }
-}
-
-/*
- Generate a public/private RSA keypair, and ask for a file to store
- them in.
-*/
-static bool keygen(int bits)
-{
- RSA *rsa_key;
- FILE *f;
- char *name = NULL;
- char *filename;
-
- get_config_string(lookup_config(config_tree, "Name"), &name);
-
- if(name && !check_id(name)) {
- fprintf(stderr, _("Invalid name for myself!\n"));
- return false;
- }
-
- fprintf(stderr, _("Generating %d bits keys:\n"), bits);
- rsa_key = RSA_generate_key(bits, 0x10001, indicator, NULL);
-
- if(!rsa_key) {
- fprintf(stderr, _("Error during key generation!\n"));
- return false;
- } else
- fprintf(stderr, _("Done.\n"));
-
- asprintf(&filename, "%s/rsa_key.priv", confbase);
- f = ask_and_open(filename, _("private RSA key"));
-
- if(!f)
- return false;
-
- if(disable_old_keys(f))
- fprintf(stderr, _("Warning: old key(s) found and disabled.\n"));
-
-#ifdef HAVE_FCHMOD
- /* Make it unreadable for others. */
- fchmod(fileno(f), 0600);
-#endif
-
- PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
- fclose(f);
- free(filename);
-
- if(name)
- asprintf(&filename, "%s/hosts/%s", confbase, name);
- else
- asprintf(&filename, "%s/rsa_key.pub", confbase);
-
- f = ask_and_open(filename, _("public RSA key"));
-
- if(!f)
- return false;
-
- if(disable_old_keys(f))
- fprintf(stderr, _("Warning: old key(s) found and disabled.\n"));
-
- PEM_write_RSAPublicKey(f, rsa_key);
- fclose(f);
- free(filename);
- if(name)
- free(name);
-
- return true;
-}
-
/*
Set all files and paths according to netname
*/
#ifdef HAVE_MINGW
HKEY key;
char installdir[1024] = "";
- long len = sizeof(installdir);
+ long len = sizeof installdir;
#endif
if(netname)
}
#endif
- if(!pidfilename)
- asprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
+ if(!controlsocketname)
+ asprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
if(!logfilename)
asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
}
}
- if (pidfilename) free(pidfilename);
+ static void free_names() {
+ if (identname) free(identname);
+ if (netname) free(netname);
++ if (controlsocketname) free(controlsocketname);
+ if (logfilename) free(logfilename);
+ if (confbase) free(confbase);
+ }
+
int main(int argc, char **argv)
{
program_name = argv[0];
if(show_version) {
printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
VERSION, __DATE__, __TIME__, PROT_CURRENT);
- printf(_("Copyright (C) 1998-2007 Ivo Timmermans, Guus Sliepen and others.\n"
+ printf(_("Copyright (C) 1998-2009 Ivo Timmermans, Guus Sliepen and others.\n"
"See the AUTHORS file for a complete list.\n\n"
"tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
"and you are welcome to redistribute it under certain conditions;\n"
return 0;
}
- if(kill_tincd)
- return !kill_other(kill_tincd);
-
openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
+ if(!event_init()) {
+ logger(LOG_ERR, _("Error initializing libevent!"));
+ return 1;
+ }
+
+ if(!init_control())
+ return 1;
+
/* Lock all pages into memory if requested */
if(do_mlock)
/* Slllluuuuuuurrrrp! */
- RAND_load_file("/dev/urandom", 1024);
-
- ENGINE_load_builtin_engines();
- ENGINE_register_all_complete();
-
- OpenSSL_add_all_algorithms();
-
- if(generate_keys) {
- read_server_config();
- return !keygen(generate_keys);
- }
+ srand(time(NULL));
+ crypto_init();
if(!read_server_config())
return 1;
/* Shutdown properly. */
- close_network_connections();
-
ifdebug(CONNECTIONS)
dump_device_stats();
+ close_network_connections();
+
end:
logger(LOG_NOTICE, _("Terminating"));
#ifndef HAVE_MINGW
- remove_pid(pidfilename);
+ exit_control();
#endif
- EVP_cleanup();
- ENGINE_cleanup();
- CRYPTO_cleanup_all_ex_data();
- ERR_remove_state(0);
- ERR_free_strings();
+ crypto_exit();
- exit_configuration(&config_tree);
- free_names();
-
return status;
}
/*
device.c -- UML network socket
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2006 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2009 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
static int data_fd = -1;
static int write_fd = -1;
static int state = 0;
- char *device;
+ char *device = NULL;
char *iface = NULL;
- char *device_info;
+ static char *device_info;
extern char *identname;
extern bool running;
static struct sockaddr_un data_sun;
-bool setup_device(void)
-{
+bool setup_device(void) {
struct sockaddr_un listen_sun;
static const int one = 1;
struct {
return true;
}
-void close_device(void)
-{
+void close_device(void) {
cp();
if(listen_fd >= 0)
close(write_fd);
unlink(device);
+
+ free(device);
+ if(iface) free(iface);
}
-bool read_packet(vpn_packet_t *packet)
-{
- int lenin;
+bool read_packet(vpn_packet_t *packet) {
+ int inlen;
cp();
}
case 1: {
- if((lenin = read(request_fd, &request, sizeof request)) != sizeof request) {
+ if((inlen = read(request_fd, &request, sizeof request)) != sizeof request) {
logger(LOG_ERR, _("Error while reading request from %s %s: %s"), device_info,
device, strerror(errno));
running = false;
}
case 2: {
- if((lenin = read(data_fd, packet->data, MTU)) <= 0) {
+ if((inlen = read(data_fd, packet->data, MTU)) <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
running = false;
return false;
}
- packet->len = lenin;
+ packet->len = inlen;
device_total_in += packet->len;
}
}
-bool write_packet(vpn_packet_t *packet)
-{
+bool write_packet(vpn_packet_t *packet) {
cp();
if(state != 2) {
return true;
}
-void dump_device_stats(void)
-{
+void dump_device_stats(void) {
cp();
logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
projects / meshlink / commitdiff