/*
net_socket.c -- Handle various kinds of sockets.
- Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>,
- 2000-2002 Guus Sliepen <guus@sliepen.eu.org>
+ Copyright (C) 1998-2005 Ivo Timmermans,
+ 2000-2006 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
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 1.1.2.23 2003/01/17 00:37:20 guus Exp $
+ $Id$
*/
-#include "config.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#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>
-#ifdef HAVE_NETINET_IN_SYSTM_H
-#include <netinet/in_systm.h>
-#endif
-#ifdef HAVE_NETINET_IP_H
-#include <netinet/ip.h>
-#endif
-#ifdef HAVE_NETINET_TCP_H
-#include <netinet/tcp.h>
-#endif
-
-#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"
+#ifdef WSAEINPROGRESS
+#define EINPROGRESS WSAEINPROGRESS
+#endif
-#ifndef HAVE_RAND_PSEUDO_BYTES
-#define RAND_pseudo_bytes RAND_bytes
+/* 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;
/* Setup sockets */
-int setup_listen_socket(sockaddr_t *sa)
+static void configure_tcp(connection_t *c)
{
- int nfd, flags;
- char *addrstr;
int option;
-#if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE)
- char *interface;
- struct ifreq ifr;
+
+#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: WSA error %d"), c->hostname, WSAGetLastError());
+ }
#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;
+
cp();
nfd = socket(sa->sa.sa_family, SOCK_STREAM, IPPROTO_TCP);
if(nfd < 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));
+ ifdebug(STATUS) logger(LOG_ERR, _("Creating metasocket failed: %s"), strerror(errno));
return -1;
}
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"), &interface)) {
+ (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, interface, IFNAMSIZ);
+ strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr))) {
- close(nfd);
- syslog(LOG_ERR, _("Can't bind to interface %s: %s"), interface,
+ closesocket(nfd);
+ logger(LOG_ERR, _("Can't bind to interface %s: %s"), iface,
strerror(errno));
return -1;
}
#else
- syslog(LOG_WARNING, _("BindToInterface not supported on this platform"));
+ logger(LOG_WARNING, _("BindToInterface not supported on this platform"));
#endif
}
if(bind(nfd, &sa->sa, SALEN(sa->sa))) {
- close(nfd);
+ closesocket(nfd);
addrstr = sockaddr2hostname(sa);
- syslog(LOG_ERR, _("Can't bind to %s/tcp: %s"), addrstr,
+ logger(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",
+ closesocket(nfd);
+ logger(LOG_ERR, _("System call `%s' failed: %s"), "listen",
strerror(errno));
return -1;
}
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 *interface;
- struct ifreq ifr;
-#endif
cp();
nfd = socket(sa->sa.sa_family, SOCK_DGRAM, IPPROTO_UDP);
if(nfd < 0) {
- syslog(LOG_ERR, _("Creating UDP socket failed: %s"), strerror(errno));
+ logger(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;
+#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: WSA error %d"), "ioctlsocket",
+ WSAGetLastError());
+ 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"), &interface)) {
- memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_ifrn.ifrn_name, interface, 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);
- syslog(LOG_ERR, _("Can't bind to interface %s: %s"), interface,
- 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);
- syslog(LOG_ERR, _("Can't bind to %s/udp: %s"), addrstr,
+ logger(LOG_ERR, _("Can't bind to %s/udp: %s"), addrstr,
strerror(errno));
free(addrstr);
return -1;
event->data = outgoing;
event_add(event);
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_NOTICE,
+ ifdebug(CONNECTIONS) logger(LOG_NOTICE,
_("Trying to re-establish outgoing connection in %d seconds"),
outgoing->timeout);
}
{
cp();
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_INFO, _("Connected to %s (%s)"), c->name, c->hostname);
+ ifdebug(CONNECTIONS) logger(LOG_INFO, _("Connected to %s (%s)"), c->name, c->hostname);
+
+ configure_tcp(c);
c->last_ping_time = now;
void do_outgoing_connection(connection_t *c)
{
char *address, *port;
- int option, result, flags;
+ int result;
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"),
+ ifdebug(CONNECTIONS) logger(LOG_ERR, _("Could not set up a meta connection to %s"),
c->name);
- c->status.remove = 1;
+ c->status.remove = true;
retry_outgoing(c->outgoing);
return;
}
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)
c->hostname = sockaddr2hostname(&c->address);
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_INFO, _("Trying to connect to %s (%s)"), c->name,
+ ifdebug(CONNECTIONS) logger(LOG_INFO, _("Trying to connect to %s (%s)"), c->name,
c->hostname);
c->socket = socket(c->address.sa.sa_family, SOCK_STREAM, IPPROTO_TCP);
if(c->socket == -1) {
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_ERR, _("Creating socket for %s failed: %s"), c->hostname,
+ ifdebug(CONNECTIONS) logger(LOG_ERR, _("Creating socket for %s failed: %s"), c->hostname,
strerror(errno));
goto 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) {
- syslog(LOG_ERR, _("fcntl for %s: %s"), c->hostname, strerror(errno));
- }
+ configure_tcp(c);
/* Connect */
result = connect(c->socket, &c->address.sa, SALEN(c->address.sa));
if(result == -1) {
- if(errno == EINPROGRESS) {
- c->status.connecting = 1;
+ if(errno == EINPROGRESS
+#if defined(WIN32) && !defined(O_NONBLOCK)
+ || WSAGetLastError() == WSAEWOULDBLOCK
+#endif
+ ) {
+ c->status.connecting = true;
return;
}
- close(c->socket);
+ closesocket(c->socket);
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_ERR, _("%s: %s"), c->hostname, strerror(errno));
+ ifdebug(CONNECTIONS) logger(LOG_ERR, _("%s: %s"), c->hostname, strerror(errno));
goto begin;
}
if(n)
if(n->connection) {
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_INFO, _("Already connected to %s"), outgoing->name);
+ ifdebug(CONNECTIONS) logger(LOG_INFO, _("Already connected to %s"), outgoing->name);
n->connection->outgoing = outgoing;
return;
outgoing->cfg = lookup_config(c->config_tree, "Address");
if(!outgoing->cfg) {
- syslog(LOG_ERR, _("No address specified for %s"), c->name);
+ logger(LOG_ERR, _("No address specified for %s"), c->name);
free_connection(c);
free(outgoing->name);
free(outgoing);
accept a new tcp connect and create a
new connection
*/
-int handle_new_meta_connection(int sock)
+bool handle_new_meta_connection(int sock)
{
connection_t *c;
sockaddr_t sa;
- int fd, len = sizeof(sa);
+ int fd;
+ socklen_t len = sizeof(sa);
cp();
fd = accept(sock, &sa.sa, &len);
if(fd < 0) {
- syslog(LOG_ERR, _("Accepting a new connection failed: %s"),
+ logger(LOG_ERR, _("Accepting a new connection failed: %s"),
strerror(errno));
- return -1;
+ return false;
}
sockaddrunmap(&sa);
c = new_connection();
+ c->name = NULL;
c->outcipher = myself->connection->outcipher;
c->outdigest = myself->connection->outdigest;
c->outmaclength = myself->connection->outmaclength;
c->socket = fd;
c->last_ping_time = now;
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_NOTICE, _("Connection from %s"), c->hostname);
+ ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Connection from %s"), c->hostname);
+
+ configure_tcp(c);
connection_add(c);
c->allow_request = ID;
send_id(c);
- return 0;
+ return true;
}
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)) {
- syslog(LOG_ERR,
+ if(!check_id(name)) {
+ logger(LOG_ERR,
_("Invalid name for outgoing connection in %s line %d"),
cfg->file, cfg->line);
free(name);
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