/*
net_setup.c -- Setup.
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2012 Guus Sliepen <guus@tinc-vpn.org>
+ 2006 Scott Lamb <slamb@slamb.org>
+ 2010 Brandon Black <blblack@gmail.com>
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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id$
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "system.h"
#include "xalloc.h"
char *myport;
+devops_t devops;
-bool read_rsa_public_key(connection_t *c)
-{
+bool read_rsa_public_key(connection_t *c) {
FILE *fp;
char *fname;
char *key;
- cp();
-
if(!c->rsa_key) {
c->rsa_key = RSA_new();
// RSA_blinding_on(c->rsa_key, NULL);
fp = fopen(fname, "r");
if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
+ logger(LOG_ERR, "Error reading RSA public key file `%s': %s",
fname, strerror(errno));
free(fname);
return false;
fp = fopen(fname, "r");
if(!fp) {
- logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
+ logger(LOG_ERR, "Error reading RSA public key file `%s': %s",
fname, strerror(errno));
free(fname);
return false;
return true;
}
- logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
+ logger(LOG_ERR, "Reading RSA public key file `%s' failed: %s",
fname, strerror(errno));
return false;
}
xasprintf(&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);
+ if(!fp) {
+ logger(LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno));
+ free(fname);
+ return false;
}
+ c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
+ fclose(fp);
free(fname);
if(c->rsa_key)
xasprintf(&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);
+ if(!fp) {
+ logger(LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno));
+ free(fname);
+ return false;
}
+ c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
+// RSA_blinding_on(c->rsa_key, NULL);
+ fclose(fp);
free(fname);
if(c->rsa_key)
return true;
- logger(LOG_ERR, _("No public key for %s specified!"), c->name);
+ logger(LOG_ERR, "No public key for %s specified!", c->name);
return false;
}
-bool read_rsa_private_key(void)
-{
+static bool read_rsa_private_key(void) {
FILE *fp;
char *fname, *key, *pubkey;
struct stat s;
- cp();
-
if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
- if(!get_config_string(lookup_config(myself->connection->config_tree, "PublicKey"), &pubkey)) {
- logger(LOG_ERR, _("PrivateKey used but no PublicKey found!"));
+ if(!get_config_string(lookup_config(config_tree, "PublicKey"), &pubkey)) {
+ logger(LOG_ERR, "PrivateKey used but no PublicKey found!");
return false;
}
myself->connection->rsa_key = RSA_new();
fp = fopen(fname, "r");
if(!fp) {
- logger(LOG_ERR, _("Error reading RSA private key file `%s': %s"),
+ logger(LOG_ERR, "Error reading RSA private key file `%s': %s",
fname, strerror(errno));
free(fname);
return false;
#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
if(fstat(fileno(fp), &s)) {
- logger(LOG_ERR, _("Could not stat RSA private key file `%s': %s'"),
+ logger(LOG_ERR, "Could not stat RSA private key file `%s': %s'",
fname, strerror(errno));
free(fname);
return false;
}
if(s.st_mode & ~0100700)
- logger(LOG_WARNING, _("Warning: insecure file permissions for RSA private key file `%s'!"), fname);
+ 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);
fclose(fp);
if(!myself->connection->rsa_key) {
- logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
+ logger(LOG_ERR, "Reading RSA private key file `%s' failed: %s",
fname, strerror(errno));
free(fname);
return false;
return true;
}
+/*
+ Read Subnets from all host config files
+*/
+void load_all_subnets(void) {
+ DIR *dir;
+ struct dirent *ent;
+ char *dname;
+ char *fname;
+ avl_tree_t *config_tree;
+ config_t *cfg;
+ subnet_t *s, *s2;
+ node_t *n;
+ bool result;
+
+ xasprintf(&dname, "%s/hosts", confbase);
+ dir = opendir(dname);
+ if(!dir) {
+ logger(LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
+ free(dname);
+ return;
+ }
+
+ while((ent = readdir(dir))) {
+ if(!check_id(ent->d_name))
+ continue;
+
+ n = lookup_node(ent->d_name);
+ #ifdef _DIRENT_HAVE_D_TYPE
+ //if(ent->d_type != DT_REG)
+ // continue;
+ #endif
+
+ xasprintf(&fname, "%s/hosts/%s", confbase, ent->d_name);
+ init_configuration(&config_tree);
+ result = read_config_file(config_tree, fname);
+ free(fname);
+ if(!result)
+ continue;
+
+ if(!n) {
+ n = new_node();
+ n->name = xstrdup(ent->d_name);
+ node_add(n);
+ }
+
+ for(cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
+ if(!get_config_subnet(cfg, &s))
+ continue;
+
+ if((s2 = lookup_subnet(n, s))) {
+ s2->expires = -1;
+ } else {
+ subnet_add(n, s);
+ }
+ }
+
+ exit_configuration(&config_tree);
+ }
+
+ closedir(dir);
+}
+
/*
Configure node_t myself and set up the local sockets (listen only)
*/
-bool setup_myself(void)
-{
+static bool setup_myself(void) {
config_t *cfg;
subnet_t *subnet;
- char *name, *hostname, *mode, *afname, *cipher, *digest;
+ char *name, *hostname, *mode, *afname, *cipher, *digest, *type;
+ char *fname = NULL;
char *address = NULL;
char *envp[5];
struct addrinfo *ai, *aip, hint = {0};
bool choice;
int i, err;
-
- cp();
+ int replaywin_int;
myself = new_node();
myself->connection = new_connection();
- init_configuration(&myself->connection->config_tree);
- xasprintf(&myself->hostname, _("MYSELF"));
- xasprintf(&myself->connection->hostname, _("MYSELF"));
+ myself->hostname = xstrdup("MYSELF");
+ myself->connection->hostname = xstrdup("MYSELF");
myself->connection->options = 0;
myself->connection->protocol_version = PROT_CURRENT;
if(!get_config_string(lookup_config(config_tree, "Name"), &name)) { /* Not acceptable */
- logger(LOG_ERR, _("Name for tinc daemon required!"));
+ logger(LOG_ERR, "Name for tinc daemon required!");
return false;
}
if(!check_id(name)) {
- logger(LOG_ERR, _("Invalid name for myself!"));
+ logger(LOG_ERR, "Invalid name for myself!");
free(name);
return false;
}
myself->name = name;
myself->connection->name = xstrdup(name);
-
- if(!read_connection_config(myself->connection)) {
- logger(LOG_ERR, _("Cannot open host configuration file for myself!"));
- return false;
- }
+ xasprintf(&fname, "%s/hosts/%s", confbase, name);
+ read_config_options(config_tree, name);
+ read_config_file(config_tree, fname);
+ free(fname);
if(!read_rsa_private_key())
return false;
- if(!get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport))
- xasprintf(&myport, "655");
+ if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
+ myport = xstrdup("655");
+
+ if(!atoi(myport)) {
+ struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM);
+ sockaddr_t sa;
+ if(!ai || !ai->ai_addr)
+ return false;
+ free(myport);
+ memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
+ sockaddr2str(&sa, NULL, &myport);
+ }
/* Read in all the subnets specified in the host configuration file */
- cfg = lookup_config(myself->connection->config_tree, "Subnet");
+ cfg = lookup_config(config_tree, "Subnet");
while(cfg) {
if(!get_config_subnet(cfg, &subnet))
subnet_add(myself, subnet);
- cfg = lookup_config_next(myself->connection->config_tree, cfg);
+ cfg = lookup_config_next(config_tree, cfg);
}
/* Check some options */
if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
myself->options |= OPTION_TCPONLY;
- if(get_config_bool(lookup_config(myself->connection->config_tree, "IndirectData"), &choice) && choice)
- myself->options |= OPTION_INDIRECT;
-
- if(get_config_bool(lookup_config(myself->connection->config_tree, "TCPOnly"), &choice) && choice)
- myself->options |= OPTION_TCPONLY;
-
if(myself->options & OPTION_TCPONLY)
myself->options |= OPTION_INDIRECT;
+ get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
+ get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
+ get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
+ strictsubnets |= tunnelserver;
if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
if(!strcasecmp(mode, "router"))
else if(!strcasecmp(mode, "hub"))
routing_mode = RMODE_HUB;
else {
- logger(LOG_ERR, _("Invalid routing mode!"));
+ logger(LOG_ERR, "Invalid routing mode!");
return false;
}
free(mode);
- } else
- routing_mode = RMODE_ROUTER;
+ }
+
+ if(get_config_string(lookup_config(config_tree, "Forwarding"), &mode)) {
+ if(!strcasecmp(mode, "off"))
+ forwarding_mode = FMODE_OFF;
+ else if(!strcasecmp(mode, "internal"))
+ forwarding_mode = FMODE_INTERNAL;
+ else if(!strcasecmp(mode, "kernel"))
+ forwarding_mode = FMODE_KERNEL;
+ else {
+ logger(LOG_ERR, "Invalid forwarding mode!");
+ return false;
+ }
+ free(mode);
+ }
- if(routing_mode == RMODE_ROUTER)
- if(!get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) || choice)
- myself->options |= OPTION_PMTU_DISCOVERY;
+ choice = true;
+ get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice);
+ if(choice)
+ myself->options |= OPTION_PMTU_DISCOVERY;
+
+ choice = true;
+ get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice);
+ if(choice)
+ myself->options |= OPTION_CLAMP_MSS;
get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
+ get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl);
+ get_config_bool(lookup_config(config_tree, "Broadcast"), &broadcast);
#if !defined(SOL_IP) || !defined(IP_TOS)
if(priorityinheritance)
- logger(LOG_WARNING, _("%s not supported on this platform"), "PriorityInheritance");
+ logger(LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");
#endif
if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
if(maxtimeout <= 0) {
- logger(LOG_ERR, _("Bogus maximum timeout!"));
+ logger(LOG_ERR, "Bogus maximum timeout!");
return false;
}
} else
maxtimeout = 900;
+ if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
+ if(udp_rcvbuf <= 0) {
+ logger(LOG_ERR, "UDPRcvBuf cannot be negative!");
+ return false;
+ }
+ }
+
+ if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
+ if(udp_sndbuf <= 0) {
+ logger(LOG_ERR, "UDPSndBuf cannot be negative!");
+ return false;
+ }
+ }
+
+ if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
+ if(replaywin_int < 0) {
+ logger(LOG_ERR, "ReplayWindow cannot be negative!");
+ return false;
+ }
+ replaywin = (unsigned)replaywin_int;
+ }
+
if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
if(!strcasecmp(afname, "IPv4"))
addressfamily = AF_INET;
else if(!strcasecmp(afname, "any"))
addressfamily = AF_UNSPEC;
else {
- logger(LOG_ERR, _("Invalid address family!"));
+ logger(LOG_ERR, "Invalid address family!");
return false;
}
free(afname);
/* Generate packet encryption key */
if(get_config_string
- (lookup_config(myself->connection->config_tree, "Cipher"), &cipher)) {
+ (lookup_config(config_tree, "Cipher"), &cipher)) {
if(!strcasecmp(cipher, "none")) {
myself->incipher = NULL;
} else {
myself->incipher = EVP_get_cipherbyname(cipher);
if(!myself->incipher) {
- logger(LOG_ERR, _("Unrecognized cipher type!"));
+ logger(LOG_ERR, "Unrecognized cipher type!");
return false;
}
}
/* Check if we want to use message authentication codes... */
- if(get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest)) {
+ if(get_config_string(lookup_config(config_tree, "Digest"), &digest)) {
if(!strcasecmp(digest, "none")) {
myself->indigest = NULL;
} else {
myself->indigest = EVP_get_digestbyname(digest);
if(!myself->indigest) {
- logger(LOG_ERR, _("Unrecognized digest type!"));
+ logger(LOG_ERR, "Unrecognized digest type!");
return false;
}
}
myself->connection->outdigest = EVP_sha1();
- if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &myself->inmaclength)) {
+ if(get_config_int(lookup_config(config_tree, "MACLength"), &myself->inmaclength)) {
if(myself->indigest) {
if(myself->inmaclength > myself->indigest->md_size) {
- logger(LOG_ERR, _("MAC length exceeds size of digest!"));
+ logger(LOG_ERR, "MAC length exceeds size of digest!");
return false;
} else if(myself->inmaclength < 0) {
- logger(LOG_ERR, _("Bogus MAC length!"));
+ logger(LOG_ERR, "Bogus MAC length!");
return false;
}
}
/* Compression */
- if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"), &myself->incompression)) {
+ if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {
if(myself->incompression < 0 || myself->incompression > 11) {
- logger(LOG_ERR, _("Bogus compression level!"));
+ logger(LOG_ERR, "Bogus compression level!");
return false;
}
} else
graph();
+ if(strictsubnets)
+ load_all_subnets();
+
/* Open device */
- if(!setup_device())
+ devops = os_devops;
+
+ if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
+ if(!strcasecmp(type, "dummy"))
+ devops = dummy_devops;
+ else if(!strcasecmp(type, "raw_socket"))
+ devops = raw_socket_devops;
+#ifdef ENABLE_UML
+ else if(!strcasecmp(type, "uml"))
+ devops = uml_devops;
+#endif
+#ifdef ENABLE_VDE
+ else if(!strcasecmp(type, "vde"))
+ devops = vde_devops;
+#endif
+ }
+
+ if(!devops.setup())
return false;
/* Run tinc-up script to further initialize the tap interface */
/* Open sockets */
- get_config_string(lookup_config(config_tree, "BindToAddress"), &address);
+ listen_sockets = 0;
+ cfg = lookup_config(config_tree, "BindToAddress");
- hint.ai_family = addressfamily;
- hint.ai_socktype = SOCK_STREAM;
- hint.ai_protocol = IPPROTO_TCP;
- hint.ai_flags = AI_PASSIVE;
+ do {
+ get_config_string(cfg, &address);
+ if(cfg)
+ cfg = lookup_config_next(config_tree, cfg);
- err = getaddrinfo(address, myport, &hint, &ai);
+ hint.ai_family = addressfamily;
+ hint.ai_socktype = SOCK_STREAM;
+ hint.ai_protocol = IPPROTO_TCP;
+ hint.ai_flags = AI_PASSIVE;
- if(err || !ai) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo",
- gai_strerror(err));
- return false;
- }
+ err = getaddrinfo(address, myport, &hint, &ai);
+ free(address);
- listen_sockets = 0;
+ if(err || !ai) {
+ logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
+ gai_strerror(err));
+ return false;
+ }
+
+ for(aip = ai; aip; aip = aip->ai_next) {
+ if(listen_sockets >= MAXSOCKETS) {
+ logger(LOG_ERR, "Too many listening sockets");
+ return false;
+ }
- for(aip = ai; aip; aip = aip->ai_next) {
- listen_socket[listen_sockets].tcp =
- setup_listen_socket((sockaddr_t *) aip->ai_addr);
+ listen_socket[listen_sockets].tcp =
+ setup_listen_socket((sockaddr_t *) aip->ai_addr);
- if(listen_socket[listen_sockets].tcp < 0)
- continue;
+ if(listen_socket[listen_sockets].tcp < 0)
+ continue;
- listen_socket[listen_sockets].udp =
- setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
+ listen_socket[listen_sockets].udp =
+ setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
- if(listen_socket[listen_sockets].udp < 0)
- continue;
+ if(listen_socket[listen_sockets].udp < 0)
+ continue;
- ifdebug(CONNECTIONS) {
- hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
- logger(LOG_NOTICE, _("Listening on %s"), hostname);
- free(hostname);
- }
+ ifdebug(CONNECTIONS) {
+ hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
+ logger(LOG_NOTICE, "Listening on %s", hostname);
+ free(hostname);
+ }
- memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
- listen_sockets++;
- }
+ memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
+ listen_sockets++;
+ }
- freeaddrinfo(ai);
+ freeaddrinfo(ai);
+ } while(cfg);
if(listen_sockets)
- logger(LOG_NOTICE, _("Ready"));
+ logger(LOG_NOTICE, "Ready");
else {
- logger(LOG_ERR, _("Unable to create any listening socket!"));
+ logger(LOG_ERR, "Unable to create any listening socket!");
return false;
}
/*
initialize network
*/
-bool setup_network(void)
-{
- cp();
-
+bool setup_network(void) {
now = time(NULL);
init_events();
/*
close all open network connections
*/
-void close_network_connections(void)
-{
+void close_network_connections(void) {
avl_node_t *node, *next;
connection_t *c;
char *envp[5];
int i;
- cp();
-
for(node = connection_tree->head; node; node = next) {
next = node->next;
c = node->data;
- c->outgoing = false;
+ c->outgoing = NULL;
terminate_connection(c, false);
}
+ for(list_node_t *node = outgoing_list->head; node; node = node->next) {
+ outgoing_t *outgoing = node->data;
+
+ if(outgoing->event)
+ event_del(outgoing->event);
+ }
+
list_delete_list(outgoing_list);
if(myself && myself->connection) {
for(i = 0; i < 4; i++)
free(envp[i]);
- close_device();
+ devops.close();
return;
}