/*
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 "utils.h"
#include "xalloc.h"
+#include <assert.h>
+
#ifdef WSAEINPROGRESS
#define EINPROGRESS WSAEINPROGRESS
#endif
listen_socket_t listen_socket[MAXSOCKETS];
int listen_sockets;
+list_t *outgoing_list = NULL;
/* Setup sockets */
#endif
}
+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;
+} /* }}} bool bind_to_interface */
+
+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;
+} /* }}} bool bind_to_address */
+
int setup_listen_socket(const sockaddr_t *sa)
{
int nfd;
option = 1;
setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
+#if defined(SOL_IPV6) && defined(IPV6_V6ONLY)
+ if(sa->sa.sa_family == AF_INET6)
+ setsockopt(nfd, SOL_IPV6, IPV6_V6ONLY, &option, sizeof option);
+#endif
+
if(get_config_string
(lookup_config(config_tree, "BindToInterface"), &iface)) {
#if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE)
return -1;
}
#else
- logger(LOG_WARNING, _("BindToInterface not supported on this platform"));
+ logger(LOG_WARNING, _("%s not supported on this platform"), "BindToInterface");
#endif
}
option = 1;
setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
-#if defined(SOL_IP) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
- {
- bool choice;
+#if defined(SOL_IPV6) && defined(IPV6_V6ONLY)
+ if(sa->sa.sa_family == AF_INET6)
+ setsockopt(nfd, SOL_IPV6, IPV6_V6ONLY, &option, sizeof option);
+#endif
- 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 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, &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)
{
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);
}
if(!c->outgoing->aip) {
- freeaddrinfo(c->outgoing->ai);
+ if(c->outgoing->ai)
+ freeaddrinfo(c->outgoing->ai);
c->outgoing->ai = NULL;
goto begin;
}
goto begin;
}
+#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, &option, sizeof option);
+#endif
+
+ bind_to_interface(c->socket);
+ bind_to_address(c);
+
/* Optimize TCP settings */
configure_tcp(c);
if(!outgoing->cfg) {
logger(LOG_ERR, _("No address specified for %s"), c->name);
free_connection(c);
- free(outgoing->name);
- free(outgoing);
return;
}
return true;
}
+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;
+
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);
outgoing = xmalloc_and_zero(sizeof(*outgoing));
outgoing->name = name;
+ list_insert_tail(outgoing_list, outgoing);
setup_outgoing_connection(outgoing);
}
}
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