X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet_socket.c;h=ab2d79d2af5037269e7fa22f92c4ddc0da8cf8dc;hp=98f5d1a2cf9e65419e9dbcd3a419cf4299c9abc8;hb=a5a4d2b865879b8694760c0a5b5909c9a3675027;hpb=eefa28059ab989c915a7d95fb4ae728abd7ce713

diff --git a/src/net_socket.c b/src/net_socket.c
index 98f5d1a2..ab2d79d2 100644
--- a/src/net_socket.c
+++ b/src/net_socket.c
@@ -1,7 +1,7 @@
 /*
     net_socket.c -- Handle various kinds of sockets.
-    Copyright (C) 1998-2003 Ivo Timmermans <ivo@o2w.nl>,
-                  2000-2003 Guus Sliepen <guus@sliepen.eu.org>
+    Copyright (C) 1998-2005 Ivo Timmermans <ivo@tinc-vpn.org>,
+                  2000-2005 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
@@ -17,7 +17,7 @@
     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 1.1.2.30 2003/07/22 20:55:20 guus Exp $
+    $Id$
 */
 
 #include "system.h"
@@ -34,38 +34,63 @@
 #include "utils.h"
 #include "xalloc.h"
 
+#ifdef WSAEINPROGRESS
+#define EINPROGRESS WSAEINPROGRESS
+#endif
+
+/* Needed on Mac OS/X */
+#ifndef SOL_TCP
+#define SOL_TCP IPPROTO_TCP
+#endif
+
 int addressfamily = AF_UNSPEC;
 int maxtimeout = 900;
 int seconds_till_retry = 5;
+bool blockingtcp = false;
 
 listen_socket_t listen_socket[MAXSOCKETS];
 int listen_sockets;
 
 /* Setup sockets */
 
-int setup_listen_socket(sockaddr_t *sa)
+static void configure_tcp(connection_t *c)
 {
-	int nfd, flags;
+	int option;
+
+#ifdef O_NONBLOCK
+	if(!blockingtcp) {
+		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));
+		}
+	}
+#endif
+
+#if defined(SOL_TCP) && defined(TCP_NODELAY)
+	option = 1;
+	setsockopt(c->socket, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
+#endif
+
+#if defined(SOL_IP) && defined(IP_TOS) && defined(IPTOS_LOWDELAY)
+	option = IPTOS_LOWDELAY;
+	setsockopt(c->socket, SOL_IP, IP_TOS, &option, sizeof(option));
+#endif
+}
+
+int setup_listen_socket(const sockaddr_t *sa)
+{
+	int nfd;
 	char *addrstr;
 	int option;
 	char *iface;
-	struct ifreq ifr;
 
 	cp();
 
 	nfd = socket(sa->sa.sa_family, SOCK_STREAM, IPPROTO_TCP);
 
 	if(nfd < 0) {
-		logger(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);
-		logger(LOG_ERR, _("System call `%s' failed: %s"), "fcntl",
-			   strerror(errno));
+		ifdebug(STATUS) logger(LOG_ERR, _("Creating metasocket failed: %s"), strerror(errno));
 		return -1;
 	}
 
@@ -74,23 +99,16 @@ int setup_listen_socket(sockaddr_t *sa)
 	option = 1;
 	setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
 
-#if defined(SOL_TCP) && defined(TCP_NODELAY)
-	setsockopt(nfd, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
-#endif
-
-#if defined(SOL_IP) && defined(IP_TOS) && defined(IPTOS_LOWDELAY)
-	option = IPTOS_LOWDELAY;
-	setsockopt(nfd, SOL_IP, IP_TOS, &option, sizeof(option));
-#endif
-
 	if(get_config_string
 	   (lookup_config(config_tree, "BindToInterface"), &iface)) {
 #if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE)
+		struct ifreq ifr;
+
 		memset(&ifr, 0, sizeof(ifr));
 		strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
 
 		if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr))) {
-			close(nfd);
+			closesocket(nfd);
 			logger(LOG_ERR, _("Can't bind to interface %s: %s"), iface,
 				   strerror(errno));
 			return -1;
@@ -101,7 +119,7 @@ int setup_listen_socket(sockaddr_t *sa)
 	}
 
 	if(bind(nfd, &sa->sa, SALEN(sa->sa))) {
-		close(nfd);
+		closesocket(nfd);
 		addrstr = sockaddr2hostname(sa);
 		logger(LOG_ERR, _("Can't bind to %s/tcp: %s"), addrstr,
 			   strerror(errno));
@@ -110,7 +128,7 @@ int setup_listen_socket(sockaddr_t *sa)
 	}
 
 	if(listen(nfd, 3)) {
-		close(nfd);
+		closesocket(nfd);
 		logger(LOG_ERR, _("System call `%s' failed: %s"), "listen",
 			   strerror(errno));
 		return -1;
@@ -119,15 +137,11 @@ int setup_listen_socket(sockaddr_t *sa)
 	return nfd;
 }
 
-int setup_vpn_in_socket(sockaddr_t *sa)
+int setup_vpn_in_socket(const sockaddr_t *sa)
 {
-	int nfd, flags;
+	int nfd;
 	char *addrstr;
 	int option;
-#if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE)
-	char *iface;
-	struct ifreq ifr;
-#endif
 
 	cp();
 
@@ -138,34 +152,65 @@ int setup_vpn_in_socket(sockaddr_t *sa)
 		return -1;
 	}
 
-	flags = fcntl(nfd, F_GETFL);
-	if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) {
-		close(nfd);
-		logger(LOG_ERR, _("System call `%s' failed: %s"), "fcntl",
-			   strerror(errno));
-		return -1;
+#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;
+		}
 	}
+#endif
 
 	option = 1;
 	setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
 
-#if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE)
-	if(get_config_string
-	   (lookup_config(config_tree, "BindToInterface"), &iface)) {
-		memset(&ifr, 0, sizeof(ifr));
-		strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
+#if defined(SOL_IP) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
+	{
+		bool choice;
 
-		if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr))) {
-			close(nfd);
-			logger(LOG_ERR, _("Can't bind to interface %s: %s"), iface,
-				   strerror(errno));
-			return -1;
+		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));
+		}
+	}
+#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));
+		}
+	}
+#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;
+			}
 		}
 	}
 #endif
 
 	if(bind(nfd, &sa->sa, SALEN(sa->sa))) {
-		close(nfd);
+		closesocket(nfd);
 		addrstr = sockaddr2hostname(sa);
 		logger(LOG_ERR, _("Can't bind to %s/udp: %s"), addrstr,
 			   strerror(errno));
@@ -200,10 +245,14 @@ void retry_outgoing(outgoing_t *outgoing)
 
 void finish_connecting(connection_t *c)
 {
+	int option;
+
 	cp();
 
 	ifdebug(CONNECTIONS) logger(LOG_INFO, _("Connected to %s (%s)"), c->name, c->hostname);
 
+	configure_tcp(c);
+
 	c->last_ping_time = now;
 
 	send_id(c);
@@ -245,8 +294,7 @@ begin:
 		goto begin;
 	}
 
-	memcpy(&c->address, c->outgoing->aip->ai_addr,
-		   c->outgoing->aip->ai_addrlen);
+	memcpy(&c->address, c->outgoing->aip->ai_addr, c->outgoing->aip->ai_addrlen);
 	c->outgoing->aip = c->outgoing->aip->ai_next;
 
 	if(c->hostname)
@@ -268,23 +316,7 @@ begin:
 
 	/* Optimize TCP settings */
 
-#if defined(SOL_TCP) && defined(TCP_NODELAY)
-	option = 1;
-	setsockopt(c->socket, SOL_TCP, TCP_NODELAY, &option, sizeof(option));
-#endif
-
-#if defined(SOL_IP) && defined(IP_TOS)
-	option = IPTOS_LOWDELAY;
-	setsockopt(c->socket, SOL_IP, IP_TOS, &option, sizeof(option));
-#endif
-
-	/* Non-blocking */
-
-	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));
-	}
+	configure_tcp(c);
 
 	/* Connect */
 
@@ -296,7 +328,7 @@ begin:
 			return;
 		}
 
-		close(c->socket);
+		closesocket(c->socket);
 
 		ifdebug(CONNECTIONS) logger(LOG_ERR, _("%s: %s"), c->hostname, strerror(errno));
 
@@ -359,6 +391,7 @@ void setup_outgoing_connection(outgoing_t *outgoing)
 */
 bool handle_new_meta_connection(int sock)
 {
+	int option;
 	connection_t *c;
 	sockaddr_t sa;
 	int fd, len = sizeof(sa);
@@ -376,6 +409,7 @@ bool handle_new_meta_connection(int sock)
 	sockaddrunmap(&sa);
 
 	c = new_connection();
+	c->name = NULL;
 	c->outcipher = myself->connection->outcipher;
 	c->outdigest = myself->connection->outdigest;
 	c->outmaclength = myself->connection->outmaclength;
@@ -388,6 +422,8 @@ bool handle_new_meta_connection(int sock)
 
 	ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Connection from %s"), c->hostname);
 
+	configure_tcp(c);
+
 	connection_add(c);
 
 	c->allow_request = ID;
@@ -404,8 +440,7 @@ void try_outgoing_connections(void)
 
 	cp();
 
-	for(cfg = lookup_config(config_tree, "ConnectTo"); cfg;
-		cfg = lookup_config_next(config_tree, cfg)) {
+	for(cfg = lookup_config(config_tree, "ConnectTo"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
 		get_config_string(cfg, &name);
 
 		if(!check_id(name)) {