X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fnet_socket.c;h=43b8ada2924bc4f3f18f41c1646d621608c7d3ff;hb=08aabbf9317806bc50a9a6693ca866c8936ce26b;hp=ffc6572bfa42f6ebde64e2cc5e3e003787c6c179;hpb=0b9175e998c2180e5d73ef3d644a49d620c68cad;p=tinc diff --git a/src/net_socket.c b/src/net_socket.c index ffc6572b..43b8ada2 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) 1998-2002 Ivo Timmermans , - 2000-2002 Guus Sliepen + Copyright (C) 1998-2005 Ivo Timmermans, + 2000-2009 Guus Sliepen 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 @@ -17,62 +17,29 @@ 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 1.1.2.25 2003/07/06 22:11:32 guus Exp $ + $Id$ */ -#include "config.h" - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -/* SunOS really wants sys/socket.h BEFORE net/if.h, - and FreeBSD wants these lines below the rest. */ -#include -#include -#include -#ifdef HAVE_NETINET_IN_SYSTM_H -#include -#endif -#ifdef HAVE_NETINET_IP_H -#include -#endif -#ifdef HAVE_NETINET_TCP_H -#include -#endif - -#include -#include -#include -#include +#include "system.h" +#include "splay_tree.h" #include "conf.h" #include "connection.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 "logger.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_UNSPEC; @@ -81,80 +48,94 @@ int seconds_till_retry = 5; 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; +static void configure_tcp(connection_t *c) { 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) { - logger(DEBUG_ALWAYS, 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(DEBUG_ALWAYS, LOG_ERR, _("System call `%s' failed: %s"), "fcntl", - strerror(errno)); + ifdebug(STATUS) logger(LOG_ERR, _("Creating metasocket failed: %s"), strerror(errno)); return -1; } /* Optimize TCP settings */ option = 1; - setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option)); + 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)); +#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"), &interface)) { + (lookup_config(config_tree, "BindToInterface"), &iface)) { #if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE) - memset(&ifr, 0, sizeof(ifr)); - strncpy(ifr.ifr_ifrn.ifrn_name, interface, IFNAMSIZ); + 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); - logger(DEBUG_ALWAYS, LOG_ERR, _("Can't bind to interface %s: %s"), interface, + 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; } #else - logger(DEBUG_ALWAYS, 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); - logger(DEBUG_ALWAYS, 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); - logger(DEBUG_ALWAYS, LOG_ERR, _("System call `%s' failed: %s"), "listen", + closesocket(nfd); + logger(LOG_ERR, _("System call `%s' failed: %s"), "listen", strerror(errno)); return -1; } @@ -162,55 +143,88 @@ int setup_listen_socket(sockaddr_t *sa) return nfd; } -int setup_vpn_in_socket(sockaddr_t *sa) -{ - int nfd, flags; +int setup_vpn_in_socket(const sockaddr_t *sa) { + 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) { - logger(DEBUG_ALWAYS, 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); - logger(DEBUG_ALWAYS, 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)); + 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_IPV6) && defined(IPV6_V6ONLY) + if(sa->sa.sa_family == AF_INET6) + setsockopt(nfd, SOL_IPV6, IPV6_V6ONLY, &option, sizeof option); +#endif - if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr))) { - close(nfd); - logger(DEBUG_ALWAYS, LOG_ERR, _("Can't bind to interface %s: %s"), interface, - strerror(errno)); - return -1; +#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) + 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; + } } } #endif if(bind(nfd, &sa->sa, SALEN(sa->sa))) { - close(nfd); + closesocket(nfd); addrstr = sockaddr2hostname(sa); - logger(DEBUG_ALWAYS, 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; @@ -219,10 +233,11 @@ int setup_vpn_in_socket(sockaddr_t *sa) return nfd; } -void retry_outgoing(outgoing_t *outgoing) -{ - event_t *event; +static void retry_outgoing_handler(int fd, short events, void *data) { + setup_outgoing_connection(data); +} +void retry_outgoing(outgoing_t *outgoing) { cp(); outgoing->timeout += 5; @@ -230,42 +245,41 @@ void retry_outgoing(outgoing_t *outgoing) 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); + timeout_set(&outgoing->ev, retry_outgoing_handler, outgoing); + event_add(&outgoing->ev, &(struct timeval){outgoing->timeout, 0}); - logger(DEBUG_CONNECTIONS, LOG_NOTICE, + ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Trying to re-establish outgoing connection in %d seconds"), outgoing->timeout); } -void finish_connecting(connection_t *c) -{ +void finish_connecting(connection_t *c) { cp(); - logger(DEBUG_CONNECTIONS, LOG_INFO, _("Connected to %s (%s)"), c->name, c->hostname); + ifdebug(CONNECTIONS) logger(LOG_INFO, _("Connected to %s (%s)"), c->name, c->hostname); - c->last_ping_time = now; + configure_tcp(c); + + c->last_ping_time = time(NULL); + c->status.connecting = false; send_id(c); } -void do_outgoing_connection(connection_t *c) -{ +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) { - logger(DEBUG_CONNECTIONS, 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; retry_outgoing(c->outgoing); + c->outgoing = NULL; + connection_del(c); return; } @@ -283,13 +297,13 @@ begin: } if(!c->outgoing->aip) { - freeaddrinfo(c->outgoing->ai); + if(c->outgoing->ai) + freeaddrinfo(c->outgoing->ai); c->outgoing->ai = NULL; 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) @@ -297,51 +311,45 @@ begin: c->hostname = sockaddr2hostname(&c->address); - logger(DEBUG_CONNECTIONS, 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) { - logger(DEBUG_CONNECTIONS, 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)); +#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 -#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); + /* Optimize TCP settings */ - if(fcntl(c->socket, F_SETFL, flags | O_NONBLOCK) < 0) { - logger(DEBUG_ALWAYS, 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); - logger(DEBUG_CONNECTIONS, LOG_ERR, _("%s: %s"), c->hostname, strerror(errno)); + ifdebug(CONNECTIONS) logger(LOG_ERR, _("%s: %s"), c->hostname, strerror(errno)); goto begin; } @@ -351,8 +359,22 @@ begin: return; } -void setup_outgoing_connection(outgoing_t *outgoing) -{ +void handle_meta_read(struct bufferevent *event, void *data) { + logger(LOG_EMERG, _("handle_meta_read() called")); + abort(); +} + +void handle_meta_write(struct bufferevent *event, void *data) { + ifdebug(META) logger(LOG_DEBUG, _("handle_meta_write() called")); +} + +void handle_meta_connection_error(struct bufferevent *event, short what, void *data) { + connection_t *c = data; + logger(LOG_EMERG, _("handle_meta_connection_error() called: %d: %s"), what, strerror(errno)); + terminate_connection(c, c->status.active); +} + +void setup_outgoing_connection(outgoing_t *outgoing) { connection_t *c; node_t *n; @@ -362,7 +384,7 @@ void setup_outgoing_connection(outgoing_t *outgoing) if(n) if(n->connection) { - logger(DEBUG_CONNECTIONS, LOG_INFO, _("Already connected to %s"), outgoing->name); + ifdebug(CONNECTIONS) logger(LOG_INFO, _("Already connected to %s"), outgoing->name); n->connection->outgoing = outgoing; return; @@ -381,44 +403,51 @@ void setup_outgoing_connection(outgoing_t *outgoing) outgoing->cfg = lookup_config(c->config_tree, "Address"); if(!outgoing->cfg) { - logger(DEBUG_ALWAYS, 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); return; } c->outgoing = outgoing; - c->last_ping_time = now; + c->last_ping_time = time(NULL); connection_add(c); do_outgoing_connection(c); + + event_set(&c->inevent, c->socket, EV_READ | EV_PERSIST, handle_meta_connection_data, c); + event_add(&c->inevent, NULL); + c->buffer = bufferevent_new(c->socket, handle_meta_read, handle_meta_write, handle_meta_connection_error, c); + if(!c->buffer) { + logger(LOG_EMERG, _("bufferevent_new() failed: %s"), strerror(errno)); + abort(); + } + bufferevent_disable(c->buffer, EV_READ); } /* accept a new tcp connect and create a new connection */ -int handle_new_meta_connection(int sock) -{ +void handle_new_meta_connection(int sock, short events, void *data) { 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) { - logger(DEBUG_ALWAYS, LOG_ERR, _("Accepting a new connection failed: %s"), - strerror(errno)); - return -1; + logger(LOG_ERR, _("Accepting a new connection failed: %s"), strerror(errno)); + return; } sockaddrunmap(&sa); c = new_connection(); + c->name = xstrdup(""); c->outcipher = myself->connection->outcipher; c->outdigest = myself->connection->outdigest; c->outmaclength = myself->connection->outmaclength; @@ -427,16 +456,35 @@ int handle_new_meta_connection(int sock) c->address = sa; c->hostname = sockaddr2hostname(&sa); c->socket = fd; - c->last_ping_time = now; + c->last_ping_time = time(NULL); + + ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Connection from %s"), c->hostname); - logger(DEBUG_CONNECTIONS, LOG_NOTICE, _("Connection from %s"), c->hostname); + event_set(&c->inevent, c->socket, EV_READ | EV_PERSIST, handle_meta_connection_data, c); + event_add(&c->inevent, NULL); + c->buffer = bufferevent_new(c->socket, NULL, handle_meta_write, handle_meta_connection_error, c); + if(!c->buffer) { + logger(LOG_EMERG, _("bufferevent_new() failed: %s"), strerror(errno)); + abort(); + } + bufferevent_disable(c->buffer, EV_READ); + + configure_tcp(c); connection_add(c); c->allow_request = ID; send_id(c); +} + +void free_outgoing(outgoing_t *outgoing) { + if(outgoing->ai) + freeaddrinfo(outgoing->ai); + + if(outgoing->name) + free(outgoing->name); - return 0; + free(outgoing); } void try_outgoing_connections(void) @@ -444,23 +492,36 @@ void try_outgoing_connections(void) static config_t *cfg = NULL; char *name; outgoing_t *outgoing; - + connection_t *c; + splay_node_t *node; + cp(); - for(cfg = lookup_config(config_tree, "ConnectTo"); cfg; - cfg = lookup_config_next(config_tree, cfg)) { + 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); - if(check_id(name)) { - logger(DEBUG_ALWAYS, LOG_ERR, + 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 = xmalloc_and_zero(sizeof *outgoing); outgoing->name = name; + list_insert_tail(outgoing_list, outgoing); setup_outgoing_connection(outgoing); } }