/*
net_socket.c -- Handle various kinds of sockets.
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2008 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.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.
-
- $Id$
+ 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 "utils.h"
#include "xalloc.h"
+#include <assert.h>
+
#ifdef WSAEINPROGRESS
#define EINPROGRESS WSAEINPROGRESS
#endif
/* Setup sockets */
-static void configure_tcp(connection_t *c)
-{
+static void configure_tcp(connection_t *c) {
int option;
#ifdef O_NONBLOCK
#endif
}
-int setup_listen_socket(const sockaddr_t *sa)
-{
+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;
+
+ status = setsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr));
+ if(status) {
+ logger(LOG_ERR, _("Can't bind to interface %s: %s"), iface,
+ strerror(errno));
+ return false;
+ }
+#else /* if !defined(SOL_SOCKET) || !defined(SO_BINDTODEVICE) */
+ logger(LOG_WARNING, _("%s not supported on this platform"), "BindToInterface");
+#endif
+
+ return true;
+}
+
+static bool bind_to_address(connection_t *c) {
+ char *node;
+ struct addrinfo *ai_list;
+ struct addrinfo *ai_ptr;
+ struct addrinfo ai_hints;
+ int status;
+
+ assert(c != NULL);
+ assert(c->socket >= 0);
+
+ node = NULL;
+ if(!get_config_string(lookup_config(config_tree, "BindToAddress"),
+ &node))
+ return true;
+
+ assert(node != NULL);
+
+ memset(&ai_hints, 0, sizeof(ai_hints));
+ ai_hints.ai_family = c->address.sa.sa_family;
+ /* We're called from `do_outgoing_connection' only. */
+ ai_hints.ai_socktype = SOCK_STREAM;
+ ai_hints.ai_protocol = IPPROTO_TCP;
+
+ ai_list = NULL;
+
+ status = getaddrinfo(node, /* service = */ NULL,
+ &ai_hints, &ai_list);
+ if(status) {
+ free(node);
+ logger(LOG_WARNING, _("Error looking up %s port %s: %s"),
+ node, _("any"), gai_strerror(status));
+ return false;
+ }
+ assert(ai_list != NULL);
+
+ status = -1;
+ for(ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) {
+ status = bind(c->socket,
+ ai_list->ai_addr, ai_list->ai_addrlen);
+ if(!status)
+ break;
+ }
+
+
+ if(status) {
+ logger(LOG_ERR, _("Can't bind to %s/tcp: %s"), node,
+ strerror(errno));
+ } else ifdebug(CONNECTIONS) {
+ logger(LOG_DEBUG, "Successfully bound outgoing "
+ "TCP socket to %s", node);
+ }
+
+ free(node);
+ freeaddrinfo(ai_list);
+
+ return status ? false : true;
+}
+
+int setup_listen_socket(const sockaddr_t *sa) {
int nfd;
char *addrstr;
int option;
return -1;
}
#else
- logger(LOG_WARNING, _("BindToInterface not supported on this platform"));
+ logger(LOG_WARNING, _("%s not supported on this platform"), "BindToInterface");
#endif
}
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
#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
-#if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE)
- {
- char *iface;
- struct ifreq ifr;
-
- if(get_config_string(lookup_config(config_tree, "BindToInterface"), &iface)) {
- memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
-
- 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 -1;
- }
- }
+ if (!bind_to_interface(nfd)) {
+ closesocket(nfd);
+ return -1;
}
-#endif
if(bind(nfd, &sa->sa, SALEN(sa->sa))) {
closesocket(nfd);
}
return nfd;
-}
+} /* int setup_vpn_in_socket */
-void retry_outgoing(outgoing_t *outgoing)
-{
+void retry_outgoing(outgoing_t *outgoing) {
event_t *event;
cp();
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);
send_id(c);
}
-void do_outgoing_connection(connection_t *c)
-{
+void do_outgoing_connection(connection_t *c) {
char *address, *port;
int result;
get_config_string(c->outgoing->cfg, &address);
if(!get_config_string(lookup_config(c->config_tree, "Port"), &port))
- asprintf(&port, "655");
+ xasprintf(&port, "655");
c->outgoing->ai = str2addrinfo(address, port, SOCK_STREAM);
free(address);
setsockopt(c->socket, SOL_IPV6, IPV6_V6ONLY, &option, sizeof option);
#endif
+ bind_to_interface(c->socket);
+ bind_to_address(c);
+
/* Optimize TCP settings */
configure_tcp(c);
return;
}
-void setup_outgoing_connection(outgoing_t *outgoing)
-{
+void setup_outgoing_connection(outgoing_t *outgoing) {
connection_t *c;
node_t *n;
accept a new tcp connect and create a
new connection
*/
-bool handle_new_meta_connection(int sock)
-{
+bool handle_new_meta_connection(int sock) {
connection_t *c;
sockaddr_t sa;
int fd;
free(outgoing);
}
-void try_outgoing_connections(void)
-{
+void try_outgoing_connections(void) {
static config_t *cfg = NULL;
char *name;
outgoing_t *outgoing;