/*
net_socket.c -- Handle various kinds of sockets.
- Copyright (C) 1998-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
- 2000-2002 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 1998-2005 Ivo Timmermans,
+ 2000-2014 Guus Sliepen <guus@tinc-vpn.org>
+ 2006 Scott Lamb <slamb@slamb.org>
+ 2009 Florian Forster <octo@verplant.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
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: net_socket.c,v 1.1.2.7 2002/03/01 14:09:31 guus Exp $
+ 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 "config.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#ifdef HAVE_LINUX
- #include <netinet/ip.h>
- #include <netinet/tcp.h>
-#endif
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <signal.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <syslog.h>
-#include <unistd.h>
-#include <sys/ioctl.h>
-/* SunOS really wants sys/socket.h BEFORE net/if.h,
- and FreeBSD wants these lines below the rest. */
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <net/if.h>
-
-#include <utils.h>
-#include <xalloc.h>
-#include <avl_tree.h>
-#include <list.h>
+#include "system.h"
+#include "avl_tree.h"
#include "conf.h"
#include "connection.h"
+#include "event.h"
+#include "logger.h"
#include "meta.h"
#include "net.h"
#include "netutl.h"
-#include "process.h"
#include "protocol.h"
-#include "subnet.h"
-#include "graph.h"
-#include "process.h"
-#include "route.h"
-#include "device.h"
-#include "event.h"
+#include "utils.h"
+#include "xalloc.h"
-#include "system.h"
+/* Needed on Mac OS/X */
+#ifndef SOL_TCP
+#define SOL_TCP IPPROTO_TCP
+#endif
-int addressfamily = AF_INET;
+int addressfamily = AF_UNSPEC;
int maxtimeout = 900;
int seconds_till_retry = 5;
+int udp_rcvbuf = 0;
+int udp_sndbuf = 0;
-int tcp_socket[MAXSOCKETS];
-int udp_socket[MAXSOCKETS];
-int listen_sockets = 0;
+listen_socket_t listen_socket[MAXSOCKETS];
+int listen_sockets;
+list_t *outgoing_list = NULL;
/* Setup sockets */
-int setup_listen_socket(sockaddr_t *sa)
-{
- int nfd, flags;
- char *addrstr;
- int option;
-#ifdef HAVE_LINUX
- char *interface;
- struct ifreq ifr;
-#endif
-cp
- if((nfd = socket(sa->sa.sa_family, SOCK_STREAM, IPPROTO_TCP)) < 0)
- {
- syslog(LOG_ERR, _("Creating metasocket failed: %s"), strerror(errno));
- return -1;
- }
-
- flags = fcntl(nfd, F_GETFL);
- if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
- {
- close(nfd);
- syslog(LOG_ERR, _("System call `%s' failed: %s"), "fcntl", strerror(errno));
- return -1;
- }
-
- /* Optimize TCP settings */
-
- option = 1;
- setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
-#ifdef HAVE_LINUX
- setsockopt(nfd, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
-
- option = IPTOS_LOWDELAY;
- setsockopt(nfd, SOL_IP, IP_TOS, &option, sizeof(option));
-
- if(get_config_string(lookup_config(config_tree, "BindToInterface"), &interface))
- {
- memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_ifrn.ifrn_name, interface, IFNAMSIZ);
- if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)))
- {
- close(nfd);
- syslog(LOG_ERR, _("Can't bind to interface %s: %s"), interface, strerror(errno));
- return -1;
+static void configure_tcp(connection_t *c) {
+ int option;
+
+#ifdef O_NONBLOCK
+ int flags = fcntl(c->socket, F_GETFL);
+
+ if(fcntl(c->socket, F_SETFL, flags | O_NONBLOCK) < 0) {
+ logger(LOG_ERR, "fcntl for %s: %s", c->hostname, strerror(errno));
+ }
+#elif defined(WIN32)
+ unsigned long arg = 1;
+
+ if(ioctlsocket(c->socket, FIONBIO, &arg) != 0) {
+ logger(LOG_ERR, "ioctlsocket for %s: %s", c->hostname, sockstrerror(sockerrno));
}
- }
#endif
- if(bind(nfd, &sa->sa, SALEN(sa->sa)))
- {
- close(nfd);
- addrstr = sockaddr2hostname(sa);
- syslog(LOG_ERR, _("Can't bind to %s/tcp: %s"), addrstr, strerror(errno));
- free(addrstr);
- return -1;
- }
-
- if(listen(nfd, 3))
- {
- close(nfd);
- syslog(LOG_ERR, _("System call `%s' failed: %s"), "listen", strerror(errno));
- return -1;
- }
-cp
- return nfd;
-}
+#if defined(SOL_TCP) && defined(TCP_NODELAY)
+ option = 1;
+ setsockopt(c->socket, SOL_TCP, TCP_NODELAY, (void *)&option, sizeof(option));
+#endif
-int setup_vpn_in_socket(sockaddr_t *sa)
-{
- int nfd, flags;
- char *addrstr;
- int option;
-#ifdef HAVE_LINUX
- char *interface;
- struct ifreq ifr;
+#if defined(SOL_IP) && defined(IP_TOS) && defined(IPTOS_LOWDELAY)
+ option = IPTOS_LOWDELAY;
+ setsockopt(c->socket, SOL_IP, IP_TOS, (void *)&option, sizeof(option));
#endif
-cp
- if((nfd = socket(sa->sa.sa_family, SOCK_DGRAM, IPPROTO_UDP)) < 0)
- {
- syslog(LOG_ERR, _("Creating UDP socket failed: %s"), strerror(errno));
- return -1;
- }
-
- flags = fcntl(nfd, F_GETFL);
- if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0)
- {
- close(nfd);
- syslog(LOG_ERR, _("System call `%s' failed: %s"), "fcntl", strerror(errno));
- return -1;
- }
-
- option = 1;
- setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
-#ifdef HAVE_LINUX
- if(get_config_string(lookup_config(config_tree, "BindToInterface"), &interface))
- {
- memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_ifrn.ifrn_name, interface, IFNAMSIZ);
- if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)))
- {
- close(nfd);
- syslog(LOG_ERR, _("Can't bind to interface %s: %s"), interface, strerror(errno));
- return -1;
+}
+
+static bool bind_to_interface(int sd) {
+ char *iface;
+
+#if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE)
+ struct ifreq ifr;
+ int status;
+#endif /* defined(SOL_SOCKET) && defined(SO_BINDTODEVICE) */
+
+ if(!get_config_string(lookup_config (config_tree, "BindToInterface"), &iface))
+ return true;
+
+#if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE)
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
+ ifr.ifr_ifrn.ifrn_name[IFNAMSIZ - 1] = 0;
+ free(iface);
+
+ status = setsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, (void *)&ifr, sizeof(ifr));
+ if(status) {
+ logger(LOG_ERR, "Can't bind to interface %s: %s", ifr.ifr_ifrn.ifrn_name, strerror(errno));
+ return false;
}
- }
+
+#else /* if !defined(SOL_SOCKET) || !defined(SO_BINDTODEVICE) */
+ logger(LOG_WARNING, "%s not supported on this platform", "BindToInterface");
#endif
- if(bind(nfd, &sa->sa, SALEN(sa->sa)))
- {
- close(nfd);
- addrstr = sockaddr2hostname(sa);
- syslog(LOG_ERR, _("Can't bind to %s/udp: %s"), addrstr, strerror(errno));
- free(addrstr);
- return -1;
- }
-cp
- return nfd;
+ return true;
}
-void retry_outgoing(outgoing_t *outgoing)
-{
- event_t *event;
-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);
-
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in %d seconds"), outgoing->timeout);
-cp
-}
+int setup_listen_socket(const sockaddr_t *sa) {
+ int nfd;
+ char *addrstr;
+ int option;
+ char *iface;
-int setup_outgoing_socket(connection_t *c)
-{
- int option;
-cp
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_INFO, _("Trying to connect to %s (%s)"), c->name, c->hostname);
+ nfd = socket(sa->sa.sa_family, SOCK_STREAM, IPPROTO_TCP);
- c->socket = socket(c->address.sa.sa_family, SOCK_STREAM, IPPROTO_TCP);
+ if(nfd < 0) {
+ ifdebug(STATUS) logger(LOG_ERR, "Creating metasocket failed: %s", sockstrerror(sockerrno));
+ return -1;
+ }
- if(c->socket == -1)
- {
- syslog(LOG_ERR, _("Creating socket for %s failed: %s"), c->hostname, strerror(errno));
- return -1;
- }
+#ifdef FD_CLOEXEC
+ fcntl(nfd, F_SETFD, FD_CLOEXEC);
+#endif
- /* Optimize TCP settings */
+ /* Optimize TCP settings */
-#ifdef HAVE_LINUX
- option = 1;
- setsockopt(c->socket, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
+ option = 1;
+ setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option));
- option = IPTOS_LOWDELAY;
- setsockopt(c->socket, SOL_IP, IP_TOS, &option, sizeof(option));
+#if defined(SOL_IPV6) && defined(IPV6_V6ONLY)
+ if(sa->sa.sa_family == AF_INET6)
+ setsockopt(nfd, SOL_IPV6, IPV6_V6ONLY, (void *)&option, sizeof option);
#endif
- /* Connect */
+ if(get_config_string(lookup_config(config_tree, "BindToInterface"), &iface)) {
+#if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE)
+ struct ifreq ifr;
- if(connect(c->socket, &c->address.sa, SALEN(c->address.sa)) == -1)
- {
- close(c->socket);
- syslog(LOG_ERR, _("Error while connecting to %s (%s): %s"), c->name, c->hostname, strerror(errno));
- return -1;
- }
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
+ ifr.ifr_ifrn.ifrn_name[IFNAMSIZ - 1] = 0;
+ free(iface);
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_INFO, _("Connected to %s (%s)"), c->name, c->hostname);
-cp
- return 0;
-}
+ if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, (void *)&ifr, sizeof(ifr))) {
+ closesocket(nfd);
+ logger(LOG_ERR, "Can't bind to interface %s: %s", ifr.ifr_ifrn.ifrn_name, strerror(sockerrno));
+ return -1;
+ }
+#else
+ logger(LOG_WARNING, "%s not supported on this platform", "BindToInterface");
+#endif
+ }
-void finish_connecting(connection_t *c)
-{
-cp
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_INFO, _("Connected to %s (%s)"), c->name, c->hostname);
+ if(bind(nfd, &sa->sa, SALEN(sa->sa))) {
+ closesocket(nfd);
+ addrstr = sockaddr2hostname(sa);
+ logger(LOG_ERR, "Can't bind to %s/tcp: %s", addrstr, sockstrerror(sockerrno));
+ free(addrstr);
+ return -1;
+ }
- c->last_ping_time = now;
+ if(listen(nfd, 3)) {
+ closesocket(nfd);
+ logger(LOG_ERR, "System call `%s' failed: %s", "listen", sockstrerror(sockerrno));
+ return -1;
+ }
- send_id(c);
-cp
+ return nfd;
}
-void do_outgoing_connection(connection_t *c)
-{
- char *address, *port;
- int option, result, flags;
-cp
-begin:
- if(!c->outgoing->ai)
- {
- if(!c->outgoing->cfg)
- {
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_ERR, _("Could not set up a meta connection to %s"), c->name);
- c->status.remove = 1;
- do_prune = 1;
- retry_outgoing(c->outgoing);
- return;
- }
+int setup_vpn_in_socket(const sockaddr_t *sa) {
+ int nfd;
+ char *addrstr;
+ int option;
- get_config_string(c->outgoing->cfg, &address);
+ nfd = socket(sa->sa.sa_family, SOCK_DGRAM, IPPROTO_UDP);
- if(!get_config_string(lookup_config(c->config_tree, "Port"), &port))
- asprintf(&port, "655");
+ if(nfd < 0) {
+ logger(LOG_ERR, "Creating UDP socket failed: %s", sockstrerror(sockerrno));
+ return -1;
+ }
- c->outgoing->ai = str2addrinfo(address, port, SOCK_STREAM);
- free(address);
- free(port);
+#ifdef FD_CLOEXEC
+ fcntl(nfd, F_SETFD, FD_CLOEXEC);
+#endif
- c->outgoing->aip = c->outgoing->ai;
- c->outgoing->cfg = lookup_config_next(c->config_tree, c->outgoing->cfg);
- }
+#ifdef O_NONBLOCK
+ {
+ int flags = fcntl(nfd, F_GETFL);
+
+ if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) {
+ closesocket(nfd);
+ logger(LOG_ERR, "System call `%s' failed: %s", "fcntl",
+ strerror(errno));
+ return -1;
+ }
+ }
+#elif defined(WIN32)
+ {
+ unsigned long arg = 1;
+ if(ioctlsocket(nfd, FIONBIO, &arg) != 0) {
+ closesocket(nfd);
+ logger(LOG_ERR, "Call to `%s' failed: %s", "ioctlsocket", sockstrerror(sockerrno));
+ return -1;
+ }
+ }
+#endif
- if(!c->outgoing->aip)
- {
- freeaddrinfo(c->outgoing->ai);
- c->outgoing->ai = NULL;
- goto begin;
- }
+ option = 1;
+ setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option));
+ setsockopt(nfd, SOL_SOCKET, SO_BROADCAST, (void *)&option, sizeof(option));
- memcpy(&c->address, c->outgoing->aip->ai_addr, c->outgoing->aip->ai_addrlen);
- c->outgoing->aip = c->outgoing->aip->ai_next;
+ if(udp_rcvbuf && setsockopt(nfd, SOL_SOCKET, SO_RCVBUF, (void *)&udp_rcvbuf, sizeof(udp_rcvbuf)))
+ logger(LOG_WARNING, "Can't set UDP SO_RCVBUF to %i: %s", udp_rcvbuf, strerror(errno));
- if(c->hostname)
- free(c->hostname);
+ if(udp_sndbuf && setsockopt(nfd, SOL_SOCKET, SO_SNDBUF, (void *)&udp_sndbuf, sizeof(udp_sndbuf)))
+ logger(LOG_WARNING, "Can't set UDP SO_SNDBUF to %i: %s", udp_sndbuf, strerror(errno));
- c->hostname = sockaddr2hostname(&c->address);
+#if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
+ if(sa->sa.sa_family == AF_INET6)
+ setsockopt(nfd, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&option, sizeof option);
+#endif
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_INFO, _("Trying to connect to %s (%s)"), c->name, c->hostname);
+#if defined(IP_DONTFRAG) && !defined(IP_DONTFRAGMENT)
+#define IP_DONTFRAGMENT IP_DONTFRAG
+#endif
- c->socket = socket(c->address.sa.sa_family, SOCK_STREAM, IPPROTO_TCP);
+#if defined(SOL_IP) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
+ if(myself->options & OPTION_PMTU_DISCOVERY) {
+ option = IP_PMTUDISC_DO;
+ setsockopt(nfd, SOL_IP, IP_MTU_DISCOVER, (void *)&option, sizeof(option));
+ }
+#elif defined(IPPROTO_IP) && defined(IP_DONTFRAGMENT)
+ if(myself->options & OPTION_PMTU_DISCOVERY) {
+ option = 1;
+ setsockopt(nfd, IPPROTO_IP, IP_DONTFRAGMENT, (void *)&option, sizeof(option));
+ }
+#endif
+
+#if defined(SOL_IPV6) && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
+ if(myself->options & OPTION_PMTU_DISCOVERY) {
+ option = IPV6_PMTUDISC_DO;
+ setsockopt(nfd, SOL_IPV6, IPV6_MTU_DISCOVER, (void *)&option, sizeof(option));
+ }
+#elif defined(IPPROTO_IPV6) && defined(IPV6_DONTFRAG)
+ if(myself->options & OPTION_PMTU_DISCOVERY) {
+ option = 1;
+ setsockopt(nfd, IPPROTO_IPV6, IPV6_DONTFRAG, (void *)&option, sizeof(option));
+ }
+#endif
+
+ if (!bind_to_interface(nfd)) {
+ closesocket(nfd);
+ return -1;
+ }
- if(c->socket == -1)
- {
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_ERR, _("Creating socket for %s failed: %s"), c->hostname, strerror(errno));
+ if(bind(nfd, &sa->sa, SALEN(sa->sa))) {
+ closesocket(nfd);
+ addrstr = sockaddr2hostname(sa);
+ logger(LOG_ERR, "Can't bind to %s/udp: %s", addrstr, sockstrerror(sockerrno));
+ free(addrstr);
+ return -1;
+ }
+
+ return nfd;
+} /* int setup_vpn_in_socket */
- goto begin;
- }
+void retry_outgoing(outgoing_t *outgoing) {
+ outgoing->timeout += 5;
- /* Optimize TCP settings */
+ if(outgoing->timeout > maxtimeout)
+ outgoing->timeout = maxtimeout;
-#ifdef HAVE_LINUX
- option = 1;
- setsockopt(c->socket, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
+ if(outgoing->event)
+ event_del(outgoing->event);
+ outgoing->event = new_event();
+ outgoing->event->handler = (event_handler_t) setup_outgoing_connection;
+ outgoing->event->time = now + outgoing->timeout;
+ outgoing->event->data = outgoing;
+ event_add(outgoing->event);
+
+ ifdebug(CONNECTIONS) logger(LOG_NOTICE,
+ "Trying to re-establish outgoing connection in %d seconds",
+ outgoing->timeout);
+}
- option = IPTOS_LOWDELAY;
- setsockopt(c->socket, SOL_IP, IP_TOS, &option, sizeof(option));
+void finish_connecting(connection_t *c) {
+ ifdebug(CONNECTIONS) logger(LOG_INFO, "Connected to %s (%s)", c->name, c->hostname);
+
+ c->last_ping_time = now;
+
+ send_id(c);
+}
+
+static void do_outgoing_pipe(connection_t *c, char *command) {
+#ifndef HAVE_MINGW
+ int fd[2];
+
+ if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
+ logger(LOG_ERR, "Could not create socketpair: %s\n", strerror(errno));
+ return;
+ }
+
+ if(fork()) {
+ c->socket = fd[0];
+ close(fd[1]);
+ ifdebug(CONNECTIONS) logger(LOG_DEBUG, "Using proxy %s", command);
+ return;
+ }
+
+ close(0);
+ close(1);
+ close(fd[0]);
+ dup2(fd[1], 0);
+ dup2(fd[1], 1);
+ close(fd[1]);
+
+ // Other filedescriptors should be closed automatically by CLOEXEC
+
+ char *host = NULL;
+ char *port = NULL;
+
+ sockaddr2str(&c->address, &host, &port);
+ setenv("REMOTEADDRESS", host, true);
+ setenv("REMOTEPORT", port, true);
+ setenv("NODE", c->name, true);
+ setenv("NAME", myself->name, true);
+ if(netname)
+ setenv("NETNAME", netname, true);
+
+ int result = system(command);
+ if(result < 0)
+ logger(LOG_ERR, "Could not execute %s: %s\n", command, strerror(errno));
+ else if(result)
+ logger(LOG_ERR, "%s exited with non-zero status %d", command, result);
+ exit(result);
+#else
+ logger(LOG_ERR, "Proxy type exec not supported on this platform!");
+ return;
#endif
+}
- /* Non-blocking */
+void do_outgoing_connection(connection_t *c) {
+ char *address, *port, *space;
+ struct addrinfo *proxyai = NULL;
+ int result;
- flags = fcntl(c->socket, F_GETFL);
+ if(!c->outgoing) {
+ logger(LOG_ERR, "do_outgoing_connection() for %s called without c->outgoing", c->name);
+ abort();
+ }
- if(fcntl(c->socket, F_SETFL, flags | O_NONBLOCK) < 0)
- {
- syslog(LOG_ERR, _("fcntl for %s: %s"), c->hostname, strerror(errno));
- }
+begin:
+ if(!c->outgoing->ai) {
+ 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;
+ return;
+ }
+
+ get_config_string(c->outgoing->cfg, &address);
+
+ space = strchr(address, ' ');
+ if(space) {
+ port = xstrdup(space + 1);
+ *space = 0;
+ } else {
+ if(!get_config_string(lookup_config(c->config_tree, "Port"), &port))
+ port = xstrdup("655");
+ }
+
+ c->outgoing->ai = str2addrinfo(address, port, SOCK_STREAM);
+ free(address);
+ free(port);
+
+ c->outgoing->aip = c->outgoing->ai;
+ c->outgoing->cfg = lookup_config_next(c->config_tree, c->outgoing->cfg);
+ }
+
+ if(!c->outgoing->aip) {
+ if(c->outgoing->ai)
+ freeaddrinfo(c->outgoing->ai);
+ c->outgoing->ai = NULL;
+ goto begin;
+ }
- /* Connect */
+ memcpy(&c->address, c->outgoing->aip->ai_addr, c->outgoing->aip->ai_addrlen);
+ c->outgoing->aip = c->outgoing->aip->ai_next;
- result = connect(c->socket, &c->address.sa, SALEN(c->address.sa));
+ if(c->hostname)
+ free(c->hostname);
- if(result == -1)
- {
- if(errno == EINPROGRESS)
- {
- c->status.connecting = 1;
- return;
+ c->hostname = sockaddr2hostname(&c->address);
+
+ ifdebug(CONNECTIONS) logger(LOG_INFO, "Trying to connect to %s (%s)", c->name,
+ c->hostname);
+
+ if(!proxytype) {
+ c->socket = socket(c->address.sa.sa_family, SOCK_STREAM, IPPROTO_TCP);
+ } else if(proxytype == PROXY_EXEC) {
+ do_outgoing_pipe(c, proxyhost);
+ } else {
+ proxyai = str2addrinfo(proxyhost, proxyport, SOCK_STREAM);
+ if(!proxyai)
+ goto begin;
+ ifdebug(CONNECTIONS) logger(LOG_INFO, "Using proxy at %s port %s", proxyhost, proxyport);
+ c->socket = socket(proxyai->ai_family, SOCK_STREAM, IPPROTO_TCP);
}
- close(c->socket);
+ if(c->socket == -1) {
+ ifdebug(CONNECTIONS) logger(LOG_ERR, "Creating socket for %s failed: %s", c->hostname, sockstrerror(sockerrno));
+ goto begin;
+ }
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_ERR, _("%s: %s"), c->hostname, strerror(errno));
+ if(proxytype != PROXY_EXEC)
+ configure_tcp(c);
+
+#ifdef FD_CLOEXEC
+ fcntl(c->socket, F_SETFD, FD_CLOEXEC);
+#endif
+
+ if(proxytype != PROXY_EXEC) {
+#if defined(SOL_IPV6) && defined(IPV6_V6ONLY)
+ int option = 1;
+ if(c->address.sa.sa_family == AF_INET6)
+ setsockopt(c->socket, SOL_IPV6, IPV6_V6ONLY, (void *)&option, sizeof option);
+#endif
+
+ bind_to_interface(c->socket);
+ }
+
+ /* Connect */
+
+ if(!proxytype) {
+ result = connect(c->socket, &c->address.sa, SALEN(c->address.sa));
+ } else if(proxytype == PROXY_EXEC) {
+ result = 0;
+ } else {
+ result = connect(c->socket, proxyai->ai_addr, proxyai->ai_addrlen);
+ freeaddrinfo(proxyai);
+ }
+
+ if(result == -1) {
+ if(sockinprogress(sockerrno)) {
+ c->status.connecting = true;
+ return;
+ }
+
+ closesocket(c->socket);
+
+ ifdebug(CONNECTIONS) logger(LOG_ERR, "%s: %s", c->hostname, sockstrerror(sockerrno));
+
+ goto begin;
+ }
- goto begin;
- }
+ finish_connecting(c);
- finish_connecting(c);
- return;
-cp
+ return;
}
-void setup_outgoing_connection(outgoing_t *outgoing)
-{
- connection_t *c;
- node_t *n;
-cp
- n = lookup_node(outgoing->name);
-
- if(n)
- if(n->connection)
- {
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_INFO, _("Already connected to %s"), outgoing->name);
- n->connection->outgoing = outgoing;
- return;
- }
-
- c = new_connection();
- c->name = xstrdup(outgoing->name);
- c->outcipher = myself->connection->outcipher;
- c->outdigest = myself->connection->outdigest;
- c->outmaclength = myself->connection->outmaclength;
- c->outcompression = myself->connection->outcompression;
-
- init_configuration(&c->config_tree);
- read_connection_config(c);
-
- outgoing->cfg = lookup_config(c->config_tree, "Address");
-
- if(!outgoing->cfg)
- {
- syslog(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;
-
- connection_add(c);
-
- do_outgoing_connection(c);
+void setup_outgoing_connection(outgoing_t *outgoing) {
+ connection_t *c;
+ node_t *n;
+
+ outgoing->event = NULL;
+
+ n = lookup_node(outgoing->name);
+
+ if(n)
+ if(n->connection) {
+ ifdebug(CONNECTIONS) logger(LOG_INFO, "Already connected to %s", outgoing->name);
+
+ n->connection->outgoing = outgoing;
+ return;
+ }
+
+ c = new_connection();
+ c->name = xstrdup(outgoing->name);
+ c->outcipher = myself->connection->outcipher;
+ c->outdigest = myself->connection->outdigest;
+ c->outmaclength = myself->connection->outmaclength;
+ c->outcompression = myself->connection->outcompression;
+
+ init_configuration(&c->config_tree);
+ read_connection_config(c);
+
+ outgoing->cfg = lookup_config(c->config_tree, "Address");
+
+ if(!outgoing->cfg) {
+ logger(LOG_ERR, "No address specified for %s", c->name);
+ free_connection(c);
+ return;
+ }
+
+ c->outgoing = outgoing;
+ c->last_ping_time = now;
+
+ connection_add(c);
+
+ do_outgoing_connection(c);
}
/*
accept a new tcp connect and create a
new connection
*/
-int handle_new_meta_connection(int sock)
-{
- connection_t *c;
- sockaddr_t sa;
- int fd, len = sizeof(sa);
-cp
- if((fd = accept(sock, &sa.sa, &len)) < 0)
- {
- syslog(LOG_ERR, _("Accepting a new connection failed: %s"), strerror(errno));
- return -1;
- }
-
- c = new_connection();
- c->outcipher = myself->connection->outcipher;
- c->outdigest = myself->connection->outdigest;
- c->outmaclength = myself->connection->outmaclength;
- c->outcompression = myself->connection->outcompression;
-
- c->address = sa;
- c->hostname = sockaddr2hostname(&sa);
- c->socket = fd;
- c->last_ping_time = now;
-
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_NOTICE, _("Connection from %s"), c->hostname);
-
- connection_add(c);
-
- c->allow_request = ID;
- send_id(c);
-cp
- return 0;
+bool handle_new_meta_connection(int sock) {
+ connection_t *c;
+ sockaddr_t sa;
+ int fd;
+ socklen_t len = sizeof(sa);
+
+ fd = accept(sock, &sa.sa, &len);
+
+ if(fd < 0) {
+ logger(LOG_ERR, "Accepting a new connection failed: %s", sockstrerror(sockerrno));
+ return false;
+ }
+
+ sockaddrunmap(&sa);
+
+ c = new_connection();
+ c->name = xstrdup("<unknown>");
+ c->outcipher = myself->connection->outcipher;
+ c->outdigest = myself->connection->outdigest;
+ c->outmaclength = myself->connection->outmaclength;
+ c->outcompression = myself->connection->outcompression;
+
+ c->address = sa;
+ c->hostname = sockaddr2hostname(&sa);
+ c->socket = fd;
+ c->last_ping_time = now;
+
+ ifdebug(CONNECTIONS) logger(LOG_NOTICE, "Connection from %s", c->hostname);
+
+ configure_tcp(c);
+
+ connection_add(c);
+
+ c->allow_request = ID;
+ send_id(c);
+
+ return true;
}
-void try_outgoing_connections(void)
-{
- static config_t *cfg = NULL;
- char *name;
- outgoing_t *outgoing;
-cp
- for(cfg = lookup_config(config_tree, "ConnectTo"); cfg; cfg = lookup_config_next(config_tree, cfg))
- {
- get_config_string(cfg, &name);
-
- if(check_id(name))
- {
- syslog(LOG_ERR, _("Invalid name for outgoing connection in %s line %d"), cfg->file, cfg->line);
- free(name);
- continue;
- }
-
- outgoing = xmalloc_and_zero(sizeof(*outgoing));
- outgoing->name = name;
- setup_outgoing_connection(outgoing);
- }
+static 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;
+
+ 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);
+
+ if(!check_id(name)) {
+ logger(LOG_ERR,
+ "Invalid name for outgoing connection in %s line %d",
+ cfg->file, cfg->line);
+ free(name);
+ continue;
+ }
+
+ outgoing = xmalloc_and_zero(sizeof(*outgoing));
+ outgoing->name = name;
+ list_insert_tail(outgoing_list, outgoing);
+ setup_outgoing_connection(outgoing);
+ }
}
projects / tinc / blobdiff