#include "fake-getaddrinfo.h"
#include "xalloc.h"
- #ifndef HAVE_GAI_STRERROR
++
+ #if !HAVE_DECL_GAI_STRERROR
-char *gai_strerror(int ecode)
-{
+char *gai_strerror(int ecode) {
switch (ecode) {
case EAI_NODATA:
return "No address associated with hostname";
}
#endif /* !HAVE_GAI_STRERROR */
- #ifndef HAVE_FREEADDRINFO
+ #if !HAVE_DECL_FREEADDRINFO
-void freeaddrinfo(struct addrinfo *ai)
-{
+void freeaddrinfo(struct addrinfo *ai) {
struct addrinfo *next;
while(ai) {
}
#endif /* !HAVE_FREEADDRINFO */
- #ifndef HAVE_GETADDRINFO
+ #if !HAVE_DECL_GETADDRINFO
-static struct addrinfo *malloc_ai(uint16_t port, uint32_t addr)
-{
+static struct addrinfo *malloc_ai(uint16_t port, uint32_t addr) {
struct addrinfo *ai;
ai = xmalloc_and_zero(sizeof(struct addrinfo) + sizeof(struct sockaddr_in));
#include "fake-getnameinfo.h"
#include "fake-getaddrinfo.h"
- #ifndef HAVE_GETNAMEINFO
+ #if !HAVE_DECL_GETNAMEINFO
-int getnameinfo(const struct sockaddr *sa, size_t salen, char *host, size_t hostlen, char *serv, size_t servlen, int flags)
-{
+int getnameinfo(const struct sockaddr *sa, size_t salen, char *host, size_t hostlen, char *serv, size_t servlen, int flags) {
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
struct hostent *hp;
int len;
EXTRA_DIST = linux/device.c bsd/device.c solaris/device.c cygwin/device.c mingw/device.c mingw/common.h raw_socket/device.c uml_socket/device.c
-tincd_SOURCES = conf.c connection.c edge.c event.c graph.c logger.c meta.c net.c net_packet.c net_setup.c \
+tincd_SOURCES = cipher.c conf.c connection.c control.c crypto.c digest.c edge.c graph.c logger.c meta.c net.c net_packet.c net_setup.c \
net_socket.c netutl.c node.c process.c protocol.c protocol_auth.c protocol_edge.c protocol_misc.c \
- protocol_key.c protocol_subnet.c route.c subnet.c tincd.c
+ protocol_key.c protocol_subnet.c route.c rsa.c subnet.c tincd.c
+
+tincctl_SOURCES = tincctl.c rsagen.c
+ if TUNEMU
+ tincd_SOURCES += bsd/tunemu.c
+ endif
+
nodist_tincd_SOURCES = device.c
DEFAULT_INCLUDES =
INCLUDES = @INCLUDES@ -I$(top_builddir) -I$(top_srcdir)/lib
-noinst_HEADERS = conf.h connection.h device.h edge.h event.h graph.h logger.h meta.h net.h netutl.h node.h process.h \
- protocol.h route.h subnet.h bsd/tunemu.h
+noinst_HEADERS = cipher.h conf.h connection.h control.h crypto.h device.h digest.h edge.h graph.h logger.h meta.h net.h netutl.h node.h process.h \
- protocol.h route.h rsa.h rsagen.h subnet.h
++ protocol.h route.h rsa.h rsagen.h subnet.h bsd/tunemu.h
-LIBS = @LIBS@ @LIBINTL@
+LIBS = @LIBS@ @LIBGCRYPT_LIBS@ @LIBINTL@
+ if TUNEMU
+ LIBS += -lpcap
+ endif
+
tincd_LDADD = \
$(top_builddir)/lib/libvpn.a
switch(device_type) {
case DEVICE_TYPE_TUN:
- if((inlen = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
+ #ifdef HAVE_TUNEMU
+ case DEVICE_TYPE_TUNEMU:
+ if(device_type == DEVICE_TYPE_TUNEMU)
- lenin = tunemu_read(device_fd, packet->data + 14, MTU - 14);
++ inlen = tunemu_read(device_fd, packet->data + 14, MTU - 14);
+ else
+ #else
- lenin = read(device_fd, packet->data + 14, MTU - 14);
++ inlen = read(device_fd, packet->data + 14, MTU - 14);
+ #endif
+
- if(lenin <= 0) {
++ if(inlen <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
#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;
+ return a < b ? -1 : a == b ? 0 : 1;
}
-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"));
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, bitfield_to_int(&c->status, sizeof c->status),
- 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)
++ bitfield_to_int(&c->status, sizeof c->status)) == -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;
#define OPTION_TCPONLY 0x0002
#define OPTION_PMTU_DISCOVERY 0x0004
- typedef union connection_status_t {
- struct {
+ typedef struct connection_status_t {
- int pinged:1; /* sent ping */
- int active:1; /* 1 if active.. */
- int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
- int termreq:1; /* the termination of this connection was requested */
- int remove:1; /* Set to 1 if you want this connection removed */
- int timeout:1; /* 1 if gotten timeout */
- int encryptout:1; /* 1 if we can encrypt outgoing traffic */
- int decryptin:1; /* 1 if we have to decrypt incoming traffic */
- int mst:1; /* 1 if this connection is part of a minimum spanning tree */
- int unused:23;
+ int pinged:1; /* sent ping */
+ int active:1; /* 1 if active.. */
+ int connecting:1; /* 1 if we are waiting for a non-blocking connect() to finish */
+ int termreq:1; /* the termination of this connection was requested */
+ int remove_unused:1; /* Set to 1 if you want this connection removed */
+ int timeout_unused:1; /* 1 if gotten timeout */
+ int encryptout:1; /* 1 if we can encrypt outgoing traffic */
+ int decryptin:1; /* 1 if we have to decrypt incoming traffic */
+ int mst:1; /* 1 if this connection is part of a minimum spanning tree */
+ int unused:23;
- };
- uint32_t value;
} connection_status_t;
#include "edge.h"
#include "process.h"
#include "subnet.h"
#include "utils.h"
+ #include "xalloc.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().
*/
n->minmtu = 0;
n->mtuprobes = 0;
- asprintf(&envp[0], "NETNAME=%s", netname ? : "");
- asprintf(&envp[1], "DEVICE=%s", device ? : "");
- asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
- asprintf(&envp[3], "NODE=%s", n->name);
- if(n->mtuevent) {
- event_del(n->mtuevent);
- n->mtuevent = NULL;
- }
++ event_del(&n->mtuevent);
+
+ xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+ xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+ xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+ xasprintf(&envp[3], "NODE=%s", n->name);
sockaddr2str(&n->address, &address, &port);
- asprintf(&envp[4], "REMOTEADDRESS=%s", address);
- asprintf(&envp[5], "REMOTEPORT=%s", port);
+ xasprintf(&envp[4], "REMOTEADDRESS=%s", address);
+ xasprintf(&envp[5], "REMOTEPORT=%s", port);
envp[6] = NULL;
execute_script(n->status.reachable ? "host-up" : "host-down", envp);
#include "utils.h"
#include "xalloc.h"
-bool send_meta(connection_t *c, const char *buffer, int length)
-{
- int outlen;
- int result;
-
+bool send_meta(connection_t *c, const char *buffer, int length) {
cp();
+ if(!c) {
+ logger(LOG_ERR, _("send_meta() called with NULL pointer!"));
+ abort();
+ }
+
ifdebug(META) logger(LOG_DEBUG, _("Sending %d bytes of metadata to %s (%s)"), length,
c->name, c->hostname);
free(iface);
}
-bool read_packet(vpn_packet_t *packet)
-{
+bool read_packet(vpn_packet_t *packet) {
- unsigned char bufno;
-
- cp();
-
- if((recv(device_fd, &bufno, 1, 0)) <= 0) {
- logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
- device, strerror(errno));
- return false;
- }
-
- packet->len = bufs[bufno].len;
- memcpy(packet->data, bufs[bufno].data, bufs[bufno].len);
-
- device_total_in += packet->len;
-
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
- device_info);
-
- return true;
+ return false;
}
-bool write_packet(vpn_packet_t *packet)
-{
- long lenout;
+bool write_packet(vpn_packet_t *packet) {
+ long outlen;
OVERLAPPED overlapped = {0};
cp();
cp();
n->mtuprobes++;
- n->mtuevent = NULL;
+ if(!n->status.reachable) {
+ logger(LOG_DEBUG, _("Trying to send MTU probe to unreachable node %s (%s)"), n->name, n->hostname);
+ return;
+ }
+
if(n->mtuprobes >= 10 && !n->minmtu) {
ifdebug(TRAFFIC) logger(LOG_INFO, _("No response to MTU probes from %s (%s)"), n->name, n->hostname);
return;
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);
+ xasprintf(&fname, "%s/rsa_key.priv", confbase);
fp = fopen(fname, "r");
/* Generate packet encryption key */
- if(get_config_string
- (lookup_config(myself->connection->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!"));
- return false;
- }
- }
- } else
- myself->incipher = EVP_aes_256_cbc();
+ if(!get_config_string(lookup_config(myself->connection->config_tree, "Cipher"), &cipher))
- cipher = xstrdup("blowfish");
++ cipher = xstrdup("aes256");
- if(myself->incipher)
- myself->inkeylength = myself->incipher->key_len + myself->incipher->iv_len;
- else
- myself->inkeylength = 1;
-
- myself->connection->outcipher = EVP_aes_256_ofb();
+ if(!cipher_open_by_name(&myself->incipher, cipher)) {
+ logger(LOG_ERR, _("Unrecognized cipher type!"));
+ return false;
+ }
if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
keylifetime = 3600;
- keyexpires = now + keylifetime;
-
+ regenerate_key();
+
/* Check if we want to use message authentication codes... */
- if(get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest)) {
- if(!strcasecmp(digest, "none")) {
- myself->indigest = NULL;
- } else {
- myself->indigest = EVP_get_digestbyname(digest);
+ if(!get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest))
- digest = xstrdup("sha1");
++ digest = xstrdup("sha256");
- if(!myself->indigest) {
- logger(LOG_ERR, _("Unrecognized digest type!"));
- return false;
- }
- }
- } else
- myself->indigest = EVP_sha256();
-
- myself->connection->outdigest = EVP_sha256();
-
- if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &myself->inmaclength)) {
- if(myself->indigest) {
- if(myself->inmaclength > myself->indigest->md_size) {
- logger(LOG_ERR, _("MAC length exceeds size of digest!"));
- return false;
- } else if(myself->inmaclength < 0) {
- logger(LOG_ERR, _("Bogus MAC length!"));
- return false;
- }
- }
- } else
- myself->inmaclength = 4;
+ int maclength = 4;
+ get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &maclength);
- myself->connection->outmaclength = 0;
+ if(maclength < 0) {
+ logger(LOG_ERR, _("Bogus MAC length!"));
+ return false;
+ }
+
+ if(!digest_open_by_name(&myself->indigest, digest, maclength)) {
+ logger(LOG_ERR, _("Unrecognized digest type!"));
+ return false;
+ }
/* Compression */
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 ? : "");
- asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
- asprintf(&envp[3], "NAME=%s", myself->name);
+ xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+ xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+ xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+ xasprintf(&envp[3], "NAME=%s", myself->name);
envp[4] = NULL;
execute_script("tinc-up", envp);
edge_del(e);
}
- splay_delete(node_tree, n);
- avl_delete(node_udp_tree, n);
- avl_delete(node_tree, n);
+ splay_delete(node_udp_tree, n);
++ splay_delete(node_tree, n);
}
-node_t *lookup_node(char *name)
-{
+node_t *lookup_node(char *name) {
node_t n = {0};
cp();
if(sa) {
n->address = *sa;
n->hostname = sockaddr2hostname(&n->address);
- splay_delete(node_udp_tree, n);
- avl_insert(node_udp_tree, n);
- ifdebug(PROTOCOL) logger(LOG_DEBUG, "UDP address of %s set to %s", n->name, n->hostname);
+ splay_insert(node_udp_tree, n);
+ logger(LOG_DEBUG, "UDP address of %s set to %s", n->name, n->hostname);
} else {
memset(&n->address, 0, sizeof n->address);
- logger(LOG_DEBUG, "UDP address of %s cleared", n->name);
+ n->hostname = 0;
+ ifdebug(PROTOCOL) logger(LOG_DEBUG, "UDP address of %s cleared", n->name);
}
}
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->outcipher ? n->outcipher->nid : 0,
- n->outdigest ? n->outdigest->type : 0, n->outmaclength, n->outcompression,
+ 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->outcipher),
+ digest_get_nid(&n->outdigest), digest_length(&n->outdigest), n->outcompression,
- n->options, *(uint32_t *)&n->status, n->nexthop ? n->nexthop->name : "-",
+ n->options, bitfield_to_int(&n->status, sizeof 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;
}
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;
char *scriptname, *p;
int i;
return true;
}
-bool send_del_edge(connection_t *c, const edge_t *e)
-{
+bool send_del_edge(connection_t *c, const edge_t *e) {
cp();
- return send_request(c, "%d %lx %s %s", DEL_EDGE, random(),
+ return send_request(c, "%d %x %s %s", DEL_EDGE, rand(),
e->from->name, e->to->name);
}
if(!mykeyused)
return true;
- return send_request(broadcast, "%d %lx %s", KEY_CHANGED, random(), myself->name);
+ return send_request(broadcast, "%d %x %s", KEY_CHANGED, rand(), myself->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;
/* 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(2.0 * c->buffer->output->off / (double)maxoutbufsize - 1 > drand48())
- if(2.0 * c->outbuflen / (float)maxoutbufsize - 1 > (float)rand()/(float)RAND_MAX)
++ if(2.0 * c->buffer->output->off / (float)maxoutbufsize - 1 > (float)rand()/(float)RAND_MAX)
return true;
if(!send_request(c, "%d %hd", PACKET, packet->len))
if(!net2str(netstr, sizeof netstr, subnet))
return false;
- return send_request(c, "%d %lx %s %s", ADD_SUBNET, random(), subnet->owner->name, netstr);
+ return send_request(c, "%d %x %s %s", ADD_SUBNET, rand(), 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];
if(!net2str(netstr, sizeof netstr, s))
return false;
- return send_request(c, "%d %lx %s %s", DEL_SUBNET, random(), s->owner->name, netstr);
+ return send_request(c, "%d %x %s %s", DEL_SUBNET, rand(), 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];
} else
return true;
}
+
+ static void swap_mac_addresses(vpn_packet_t *packet) {
+ mac_t tmp;
+ memcpy(&tmp, &packet->data[0], sizeof tmp);
+ memcpy(&packet->data[0], &packet->data[6], sizeof tmp);
+ memcpy(&packet->data[6], &tmp, sizeof tmp);
+ }
+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;
}
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=";
+ char *envp[9] = {0};
+ char netstr[MAXNETSTR];
char *name, *address, *port;
+ char empty[] = "";
+
+ // Prepare environment variables to be passed to the script
- asprintf(&envp[0], "NETNAME=%s", netname ? : "");
- asprintf(&envp[1], "DEVICE=%s", device ? : "");
- asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
- asprintf(&envp[3], "NODE=%s", owner->name);
+ xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+ xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+ xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+ xasprintf(&envp[3], "NODE=%s", owner->name);
if(owner != myself) {
sockaddr2str(&owner->address, &address, &port);
execute_script(name, envp);
}
} else {
- if(net2str(netstr + 7, sizeof netstr - 7, subnet))
+ if(net2str(netstr + 7, sizeof netstr - 7, subnet)) {
+ // Strip the weight from the subnet, and put it in its own environment variable
+ char *weight = strchr(netstr + 7, '#');
+ if(weight)
+ *weight++ = 0;
+ else
+ weight = empty;
+
+ // Prepare the SUBNET and WEIGHT variables
+ xasprintf(&envp[4], "SUBNET=%s", netstr);
+ xasprintf(&envp[5], "WEIGHT=%s", weight);
+
execute_script(name, envp);
+ }
}
- for(i = 0; i < (owner != myself ? 6 : 4); i++)
+ for(i = 0; envp[i] && i < 9; i++)
free(envp[i]);
-
- if(owner != myself) {
- free(address);
- free(port);
- }
}
-void dump_subnets(void)
+int dump_subnets(struct evbuffer *out)
{
char netstr[MAXNETSTR];
subnet_t *subnet;
--- /dev/null
- return !keygen(optind > argc ? atoi(argv[optind + 1]) : 1024);
+/*
+ tincctl.c -- Controlling a running tincd
+ Copyright (C) 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ 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.
+
+ $Id$
+*/
+
+#include "system.h"
+
+#include <sys/un.h>
+#include <getopt.h>
+
+#include "xalloc.h"
+#include "protocol.h"
+#include "control_common.h"
+#include "rsagen.h"
+
+/* The name this program was run with. */
+char *program_name = NULL;
+
+/* If nonzero, display usage information and exit. */
+bool show_help = false;
+
+/* 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;
+
+static char *identname = NULL; /* program name for syslog */
+static char *controlsocketname = NULL; /* pid file location */
+char *netname = NULL;
+char *confbase = NULL;
+
+static struct option const long_options[] = {
+ {"config", required_argument, NULL, 'c'},
+ {"net", required_argument, NULL, 'n'},
+ {"help", no_argument, NULL, 1},
+ {"version", no_argument, NULL, 2},
+ {"controlsocket", required_argument, NULL, 5},
+ {NULL, 0, NULL, 0}
+};
+
+static void usage(bool status) {
+ if(status)
+ fprintf(stderr, _("Try `%s --help\' for more information.\n"),
+ program_name);
+ else {
+ printf(_("Usage: %s [options] command\n\n"), program_name);
+ printf(_("Valid options are:\n"
+ " -c, --config=DIR Read configuration options from DIR.\n"
+ " -n, --net=NETNAME Connect to net NETNAME.\n"
+ " --controlsocket=FILENAME Open control socket at FILENAME.\n"
+ " --help Display this help and exit.\n"
+ " --version Output version information and exit.\n"
+ "\n"
+ "Valid commands are:\n"
+ " start Start tincd.\n"
+ " stop Stop tincd.\n"
+ " restart Restart tincd.\n"
+ " reload Reload configuration of running tincd.\n"
+ " pid Show PID of currently running tincd.\n"
+ " generate-keys [bits] Generate a new public/private keypair.\n"
+ " dump Dump a list of one of the following things:\n"
+ " nodes - all known nodes in the VPN\n"
+ " edges - all known connections in the VPN\n"
+ " subnets - all known subnets in the VPN\n"
+ " connections - all meta connections with ourself\n"
+ " graph - graph of the VPN in dotty format\n"
+ " purge Purge unreachable nodes\n"
+ " debug N Set debug level\n"
+ " retry Retry all outgoing connections\n"
+ " reload Partial reload of configuration\n"
+ "\n"));
+ printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
+ }
+}
+
+static bool parse_options(int argc, char **argv) {
+ int r;
+ int option_index = 0;
+
+ while((r = getopt_long(argc, argv, "c:n:", long_options, &option_index)) != EOF) {
+ switch (r) {
+ case 0: /* long option */
+ break;
+
+ case 'c': /* config file */
+ confbase = xstrdup(optarg);
+ break;
+
+ case 'n': /* net name given */
+ netname = xstrdup(optarg);
+ break;
+
+ case 1: /* show help */
+ show_help = true;
+ break;
+
+ case 2: /* show version */
+ show_version = true;
+ break;
+
+ case 5: /* open control socket here */
+ controlsocketname = xstrdup(optarg);
+ break;
+
+ case '?':
+ usage(true);
+ return false;
+
+ default:
+ break;
+ }
+ }
+
+ return true;
+}
+
+FILE *ask_and_open(const char *filename, const char *what, const char *mode) {
+ FILE *r;
+ char *directory;
+ char buf[PATH_MAX];
+ char buf2[PATH_MAX];
+ size_t len;
+
+ /* Check stdin and stdout */
+ if(isatty(0) && isatty(1)) {
+ /* Ask for a file and/or directory name. */
+ fprintf(stdout, _("Please enter a file to save %s to [%s]: "),
+ what, filename);
+ fflush(stdout);
+
+ if(fgets(buf, sizeof buf, stdin) < 0) {
+ fprintf(stderr, _("Error while reading stdin: %s\n"),
+ strerror(errno));
+ return NULL;
+ }
+
+ len = strlen(buf);
+ if(len)
+ buf[--len] = 0;
+
+ if(len)
+ filename = buf;
+ }
+
+#ifdef HAVE_MINGW
+ if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
+#else
+ if(filename[0] != '/') {
+#endif
+ /* The directory is a relative path or a filename. */
+ directory = get_current_dir_name();
+ snprintf(buf2, sizeof buf2, "%s/%s", directory, filename);
+ filename = buf2;
+ }
+
+ umask(0077); /* Disallow everything for group and other */
+
+ /* Open it first to keep the inode busy */
+
+ r = fopen(filename, mode);
+
+ if(!r) {
+ fprintf(stderr, _("Error opening file `%s': %s\n"), filename, strerror(errno));
+ return NULL;
+ }
+
+ return r;
+}
+
+/*
+ Generate a public/private RSA keypair, and ask for a file to store
+ them in.
+*/
+static bool keygen(int bits) {
+ rsa_t key;
+ FILE *f;
+ char *name = NULL;
+ char *filename;
+
+ fprintf(stderr, _("Generating %d bits keys:\n"), bits);
+
+ if(!rsa_generate(&key, bits, 0x10001)) {
+ 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"), "a");
+
+ if(!f)
+ return false;
+
+#ifdef HAVE_FCHMOD
+ /* Make it unreadable for others. */
+ fchmod(fileno(f), 0600);
+#endif
+
+ if(ftell(f))
+ fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
+
+ rsa_write_pem_private_key(&key, f);
+
+ 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"), "a");
+
+ if(!f)
+ return false;
+
+ if(ftell(f))
+ fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
+
+ rsa_write_pem_public_key(&key, f);
+
+ fclose(f);
+ free(filename);
+
+ return true;
+}
+
+/*
+ Set all files and paths according to netname
+*/
+static void make_names(void) {
+#ifdef HAVE_MINGW
+ HKEY key;
+ char installdir[1024] = "";
+ long len = sizeof installdir;
+#endif
+
+ if(netname)
+ asprintf(&identname, "tinc.%s", netname);
+ else
+ identname = xstrdup("tinc");
+
+#ifdef HAVE_MINGW
+ if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
+ if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
+ if(!logfilename)
+ asprintf(&logfilename, "%s/log/%s.log", identname);
+ if(!confbase) {
+ if(netname)
+ asprintf(&confbase, "%s/%s", installdir, netname);
+ else
+ asprintf(&confbase, "%s", installdir);
+ }
+ }
+ RegCloseKey(key);
+ if(*installdir)
+ return;
+ }
+#endif
+
+ if(!controlsocketname)
+ asprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
+
+ if(netname) {
+ if(!confbase)
+ asprintf(&confbase, CONFDIR "/tinc/%s", netname);
+ else
+ fprintf(stderr, _("Both netname and configuration directory given, using the latter...\n"));
+ } else {
+ if(!confbase)
+ asprintf(&confbase, CONFDIR "/tinc");
+ }
+}
+
+static int fullread(int fd, void *data, size_t datalen) {
+ int rv, len = 0;
+
+ while(len < datalen) {
+ rv = read(fd, data + len, datalen - len);
+ if(rv == -1 && errno == EINTR)
+ continue;
+ else if(rv == -1)
+ return rv;
+ else if(rv == 0) {
+ errno = ENODATA;
+ return -1;
+ }
+ len += rv;
+ }
+ return 0;
+}
+
+/*
+ Send a request (raw)
+*/
+static int send_ctl_request(int fd, enum request_type type,
+ void const *outdata, size_t outdatalen,
+ int *res_errno_p, void **indata_p,
+ size_t *indatalen_p) {
+ tinc_ctl_request_t req;
+ int rv;
+ struct iovec vector[2] = {
+ {&req, sizeof req},
+ {(void*) outdata, outdatalen}
+ };
+ void *indata;
+
+ if(res_errno_p == NULL)
+ return -1;
+
+ memset(&req, 0, sizeof req);
+ req.length = sizeof req + outdatalen;
+ req.type = type;
+ req.res_errno = 0;
+
+ while((rv = writev(fd, vector, 2)) == -1 && errno == EINTR) ;
+ if(rv != req.length)
+ return -1;
+
+ if(fullread(fd, &req, sizeof req) == -1)
+ return -1;
+
+ if(req.length < sizeof req) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if(req.length > sizeof req) {
+ if(indata_p == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ indata = xmalloc(req.length - sizeof req);
+
+ if(fullread(fd, indata, req.length - sizeof req) == -1) {
+ free(indata);
+ return -1;
+ }
+
+ *indata_p = indata;
+ if(indatalen_p != NULL)
+ *indatalen_p = req.length - sizeof req;
+ }
+
+ *res_errno_p = req.res_errno;
+
+ return 0;
+}
+
+/*
+ Send a request (with printfs)
+*/
+static int send_ctl_request_cooked(int fd, enum request_type type,
+ void const *outdata, size_t outdatalen)
+{
+ int res_errno = -1;
+ char *buf = NULL;
+ size_t buflen = 0;
+
+ if(send_ctl_request(fd, type, outdata, outdatalen, &res_errno,
+ (void**) &buf, &buflen)) {
+ fprintf(stderr, _("Error sending request: %s\n"), strerror(errno));
+ return -1;
+ }
+
+ if(buf != NULL) {
+ printf("%*s", (int)buflen, buf);
+ free(buf);
+ }
+
+ if(res_errno != 0) {
+ fprintf(stderr, _("Server reported error: %s\n"), strerror(res_errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+int main(int argc, char *argv[], char *envp[]) {
+ struct sockaddr_un addr;
+ tinc_ctl_greeting_t greeting;
+ int fd;
+ int result;
+
+ program_name = argv[0];
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+
+ if(!parse_options(argc, argv))
+ return 1;
+
+ make_names();
+
+ 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"
+ "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"
+ "see the file COPYING for details.\n"));
+
+ return 0;
+ }
+
+ if(show_help) {
+ usage(false);
+ return 0;
+ }
+
+ if(optind >= argc) {
+ fprintf(stderr, _("Not enough arguments.\n"));
+ usage(true);
+ return 1;
+ }
+
+ // First handle commands that don't involve connecting to a running tinc daemon.
+
+ if(!strcasecmp(argv[optind], "generate-keys")) {
++ return !keygen(optind > argc ? atoi(argv[optind + 1]) : 2048);
+ }
+
+ if(!strcasecmp(argv[optind], "start")) {
+ argv[optind] = NULL;
+ execve(SBINDIR "/tincd", argv, envp);
+ fprintf(stderr, _("Could not start tincd: %s"), strerror(errno));
+ return 1;
+ }
+
+ /*
+ * Now handle commands that do involve connecting to a running tinc daemon.
+ * Authenticate the server by ensuring the parent directory can be
+ * traversed only by root. Note this is not totally race-free unless all
+ * ancestors are writable only by trusted users, which we don't verify.
+ */
+
+ struct stat statbuf;
+ char *lastslash = strrchr(controlsocketname, '/');
+ if(lastslash != NULL) {
+ /* control socket is not in cwd; stat its parent */
+ *lastslash = 0;
+ result = stat(controlsocketname, &statbuf);
+ *lastslash = '/';
+ } else
+ result = stat(".", &statbuf);
+
+ if(result < 0) {
+ fprintf(stderr, _("Unable to check control socket directory permissions: %s\n"), strerror(errno));
+ return 1;
+ }
+
+ if(statbuf.st_uid != 0 || (statbuf.st_mode & S_IXOTH) != 0 || (statbuf.st_gid != 0 && (statbuf.st_mode & S_IXGRP)) != 0) {
+ fprintf(stderr, _("Insecure permissions on control socket directory\n"));
+ return 1;
+ }
+
+ if(strlen(controlsocketname) >= sizeof addr.sun_path) {
+ fprintf(stderr, _("Control socket filename too long!\n"));
+ return 1;
+ }
+
+ fd = socket(PF_UNIX, SOCK_STREAM, 0);
+ if(fd < 0) {
+ fprintf(stderr, _("Cannot create UNIX socket: %s\n"), strerror(errno));
+ return 1;
+ }
+
+ memset(&addr, 0, sizeof addr);
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, controlsocketname, sizeof addr.sun_path - 1);
+
+ if(connect(fd, (struct sockaddr *)&addr, sizeof addr) < 0) {
+ fprintf(stderr, _("Cannot connect to %s: %s\n"), controlsocketname, strerror(errno));
+ return 1;
+ }
+
+ if(fullread(fd, &greeting, sizeof greeting) == -1) {
+ fprintf(stderr, _("Cannot read greeting from control socket: %s\n"),
+ strerror(errno));
+ return 1;
+ }
+
+ if(greeting.version != TINC_CTL_VERSION_CURRENT) {
+ fprintf(stderr, _("Version mismatch: server %d, client %d\n"),
+ greeting.version, TINC_CTL_VERSION_CURRENT);
+ return 1;
+ }
+
+ if(!strcasecmp(argv[optind], "pid")) {
+ printf("%d\n", greeting.pid);
+ return 0;
+ }
+
+ if(!strcasecmp(argv[optind], "stop")) {
+ return send_ctl_request_cooked(fd, REQ_STOP, NULL, 0) != -1;
+ }
+
+ if(!strcasecmp(argv[optind], "reload")) {
+ return send_ctl_request_cooked(fd, REQ_RELOAD, NULL, 0) != -1;
+ }
+
+ if(!strcasecmp(argv[optind], "restart")) {
+ return send_ctl_request_cooked(fd, REQ_RESTART, NULL, 0) != -1;
+ }
+
+ if(!strcasecmp(argv[optind], "dump")) {
+ if(argc < optind + 2) {
+ fprintf(stderr, _("Not enough arguments.\n"));
+ usage(true);
+ return 1;
+ }
+
+ if(!strcasecmp(argv[optind+1], "nodes")) {
+ return send_ctl_request_cooked(fd, REQ_DUMP_NODES, NULL, 0) != -1;
+ }
+
+ if(!strcasecmp(argv[optind+1], "edges")) {
+ return send_ctl_request_cooked(fd, REQ_DUMP_EDGES, NULL, 0) != -1;
+ }
+
+ if(!strcasecmp(argv[optind+1], "subnets")) {
+ return send_ctl_request_cooked(fd, REQ_DUMP_SUBNETS, NULL, 0) != -1;
+ }
+
+ if(!strcasecmp(argv[optind+1], "connections")) {
+ return send_ctl_request_cooked(fd, REQ_DUMP_CONNECTIONS, NULL, 0) != -1;
+ }
+
+ if(!strcasecmp(argv[optind+1], "graph")) {
+ return send_ctl_request_cooked(fd, REQ_DUMP_GRAPH, NULL, 0) != -1;
+ }
+
+ fprintf(stderr, _("Unknown dump type '%s'.\n"), argv[optind+1]);
+ usage(true);
+ return 1;
+ }
+
+ if(!strcasecmp(argv[optind], "purge")) {
+ return send_ctl_request_cooked(fd, REQ_PURGE, NULL, 0) != -1;
+ }
+
+ if(!strcasecmp(argv[optind], "debug")) {
+ int debuglevel;
+
+ if(argc != optind + 2) {
+ fprintf(stderr, "Invalid arguments.\n");
+ return 1;
+ }
+ debuglevel = atoi(argv[optind+1]);
+ return send_ctl_request_cooked(fd, REQ_SET_DEBUG, &debuglevel,
+ sizeof debuglevel) != -1;
+ }
+
+ if(!strcasecmp(argv[optind], "retry")) {
+ return send_ctl_request_cooked(fd, REQ_RETRY, NULL, 0) != -1;
+ }
+
+ if(!strcasecmp(argv[optind], "reload")) {
+ return send_ctl_request_cooked(fd, REQ_RELOAD, NULL, 0) != -1;
+ }
+
+ fprintf(stderr, _("Unknown command `%s'.\n"), argv[optind]);
+ usage(true);
+
+ close(fd);
+
+ return 0;
+}
}
#endif
- if(!pidfilename)
- xasprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
+ if(!controlsocketname)
- asprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
++ xasprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
if(!logfilename)
- asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
+ xasprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
if(netname) {
if(!confbase)
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