X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet.c;h=7a2a8e7f8b20463aac07c40a744da91156022f3e;hp=106549e0b4a71cdbbfa41b65de7e23b30e333dcc;hb=24a2c7e51a0b080c4bdb55f697b3f0458ebc3fb1;hpb=125c4978812cffa5154ce5378a276f43f78417d8 diff --git a/src/net.c b/src/net.c index 106549e0..7a2a8e7f 100644 --- a/src/net.c +++ b/src/net.c @@ -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.c,v 1.35.4.101 2001/03/01 21:32:01 guus Exp $ + $Id: net.c,v 1.35.4.131 2001/09/24 14:12:00 guus Exp $ */ #include "config.h" @@ -26,8 +26,10 @@ #include #include #include -#include -#include +#ifdef HAVE_LINUX + #include + #include +#endif #include #include #include @@ -43,32 +45,30 @@ #include #include -#ifdef HAVE_OPENSSL_RAND_H -# include -#else -# include -#endif +#include +#include +#include -#ifdef HAVE_OPENSSL_EVP_H -# include -#else -# include +#ifndef HAVE_RAND_PSEUDO_BYTES +#define RAND_pseudo_bytes RAND_bytes #endif -#ifdef HAVE_OPENSSL_ERR_H -# include -#else -# include -#endif - -#ifdef HAVE_OPENSSL_PEM_H -# include -#else -# include +#ifdef HAVE_TUNTAP + #ifdef HAVE_LINUX + #ifdef LINUX_IF_TUN_H + #include LINUX_IF_TUN_H + #else + #include + #endif + #else + #include + #endif #endif -#ifdef HAVE_TUNTAP -#include LINUX_IF_TUN_H +#ifdef HAVE_SOLARIS + #include + #include + #include #endif #include @@ -85,6 +85,7 @@ #include "protocol.h" #include "subnet.h" #include "process.h" +#include "route.h" #include "system.h" @@ -95,41 +96,47 @@ int total_tap_out = 0; int total_socket_in = 0; int total_socket_out = 0; -config_t *upstreamcfg; -static int seconds_till_retry; +int seconds_till_retry = 5; int keylifetime = 0; int keyexpires = 0; -char *unknown = NULL; - -subnet_t mymac; - -int xsend(connection_t *cl, vpn_packet_t *inpkt) +void send_udppacket(connection_t *cl, vpn_packet_t *inpkt) { vpn_packet_t outpkt; int outlen, outpad; EVP_CIPHER_CTX ctx; struct sockaddr_in to; socklen_t tolen = sizeof(to); + vpn_packet_t *copy; cp - outpkt.len = inpkt->len; - + if(!cl->status.validkey) + { + if(debug_lvl >= DEBUG_TRAFFIC) + syslog(LOG_INFO, _("No valid key known yet for %s (%s), queueing packet"), + cl->name, cl->hostname); + + /* Since packet is on the stack of handle_tap_input(), + we have to make a copy of it first. */ + + copy = xmalloc(sizeof(vpn_packet_t)); + memcpy(copy, inpkt, sizeof(vpn_packet_t)); + + list_insert_tail(cl->queue, copy); + + if(!cl->status.waitingforkey) + send_req_key(myself, cl); + return; + } + /* Encrypt the packet. */ - - EVP_EncryptInit(&ctx, cl->cipher_pkttype, cl->cipher_pktkey, cl->cipher_pktkey + cl->cipher_pkttype->key_len); - EVP_EncryptUpdate(&ctx, outpkt.data, &outlen, inpkt->data, inpkt->len); - EVP_EncryptFinal(&ctx, outpkt.data + outlen, &outpad); - outlen += outpad + 2; -/* Bypass - outlen = outpkt.len + 2; - memcpy(&outpkt, inpkt, outlen); -*/ + RAND_pseudo_bytes(inpkt->salt, sizeof(inpkt->salt)); - if(debug_lvl >= DEBUG_TRAFFIC) - syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"), - outlen, cl->name, cl->hostname); + EVP_EncryptInit(&ctx, cl->cipher_pkttype, cl->cipher_pktkey, cl->cipher_pktkey + cl->cipher_pkttype->key_len); + EVP_EncryptUpdate(&ctx, outpkt.salt, &outlen, inpkt->salt, inpkt->len + sizeof(inpkt->salt)); + EVP_EncryptFinal(&ctx, outpkt.salt + outlen, &outpad); + outlen += outpad; total_socket_out += outlen; @@ -137,49 +144,69 @@ cp to.sin_addr.s_addr = htonl(cl->address); to.sin_port = htons(cl->port); - if((sendto(myself->socket, (char *) &(outpkt.len), outlen, 0, (const struct sockaddr *)&to, tolen)) < 0) + if((sendto(myself->socket, (char *) outpkt.salt, outlen, 0, (const struct sockaddr *)&to, tolen)) < 0) { syslog(LOG_ERR, _("Error sending packet to %s (%s): %m"), cl->name, cl->hostname); - return -1; + return; } cp - return 0; } -int xrecv(connection_t *cl, vpn_packet_t *inpkt) +void receive_packet(connection_t *cl, vpn_packet_t *packet) +{ +cp + if(debug_lvl >= DEBUG_TRAFFIC) + syslog(LOG_DEBUG, _("Received packet of %d bytes from %s (%s)"), packet->len, cl->name, cl->hostname); + + route_incoming(cl, packet); +cp +} + +void receive_udppacket(connection_t *cl, vpn_packet_t *inpkt) { vpn_packet_t outpkt; int outlen, outpad; EVP_CIPHER_CTX ctx; cp - outpkt.len = inpkt->len; - /* Decrypt the packet */ EVP_DecryptInit(&ctx, myself->cipher_pkttype, myself->cipher_pktkey, myself->cipher_pktkey + myself->cipher_pkttype->key_len); - EVP_DecryptUpdate(&ctx, outpkt.data, &outlen, inpkt->data, inpkt->len + 8); - EVP_DecryptFinal(&ctx, outpkt.data + outlen, &outpad); + EVP_DecryptUpdate(&ctx, outpkt.salt, &outlen, inpkt->salt, inpkt->len); + EVP_DecryptFinal(&ctx, outpkt.salt + outlen, &outpad); outlen += outpad; + outpkt.len = outlen - sizeof(outpkt.salt); -/* Bypass - outlen = outpkt.len+2; - memcpy(&outpkt, inpkt, outlen); -*/ + total_socket_in += outlen; + + receive_packet(cl, &outpkt); cp - return receive_packet(cl, &outpkt); } -int receive_packet(connection_t *cl, vpn_packet_t *packet) +void receive_tcppacket(connection_t *cl, char *buffer, int len) { - if(debug_lvl >= DEBUG_TRAFFIC) - syslog(LOG_ERR, _("Writing packet of %d bytes to tap device"), - packet->len); + vpn_packet_t outpkt; +cp + outpkt.len = len; + memcpy(outpkt.data, buffer, len); - /* Fix mac address */ + receive_packet(cl, &outpkt); +cp +} - memcpy(packet->data, mymac.net.mac.address.x, 6); +void accept_packet(vpn_packet_t *packet) +{ +cp + if(debug_lvl >= DEBUG_TRAFFIC) + syslog(LOG_DEBUG, _("Writing packet of %d bytes to tap device"), + packet->len); +#ifdef HAVE_SOLARIS + if(write(tap_fd, packet->data + 14, packet->len - 14) < 0) + syslog(LOG_ERR, _("Can't write to tun/tap device: %m")); + else + total_tap_out += packet->len; +#else if(taptype == TAP_TYPE_TUNTAP) { if(write(tap_fd, packet->data, packet->len) < 0) @@ -192,43 +219,31 @@ int receive_packet(connection_t *cl, vpn_packet_t *packet) if(write(tap_fd, packet->data - 2, packet->len + 2) < 0) syslog(LOG_ERR, _("Can't write to ethertap device: %m")); else - total_tap_out += packet->len + 2; + total_tap_out += packet->len; } +#endif cp - return 0; } /* send a packet to the given vpn ip. */ -int send_packet(ip_t to, vpn_packet_t *packet) +void send_packet(connection_t *cl, vpn_packet_t *packet) { - connection_t *cl; - subnet_t *subnet; - vpn_packet_t *copy; + connection_t *hop; cp - if((subnet = lookup_subnet_ipv4(&to)) == NULL) - { - if(debug_lvl >= DEBUG_TRAFFIC) - { - syslog(LOG_NOTICE, _("Trying to look up %d.%d.%d.%d in connection list failed!"), - IP_ADDR_V(to)); - } - - return -1; - } + if(debug_lvl >= DEBUG_TRAFFIC) + syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"), + packet->len, cl->name, cl->hostname); - cl = subnet->owner; - if(cl == myself) { if(debug_lvl >= DEBUG_TRAFFIC) { - syslog(LOG_NOTICE, _("Packet with destination %d.%d.%d.%d is looping back to us!"), - IP_ADDR_V(to)); + syslog(LOG_NOTICE, _("Packet is looping back to us!")); } - return -1; + return; } if(!cl->status.active) @@ -237,34 +252,51 @@ cp syslog(LOG_INFO, _("%s (%s) is not active, dropping packet"), cl->name, cl->hostname); - return 0; + return; } - if(!cl->status.validkey) + if(myself->options & OPTION_TCPONLY) { - if(debug_lvl >= DEBUG_TRAFFIC) - syslog(LOG_INFO, _("No valid key known yet for %s (%s), queueing packet"), - cl->name, cl->hostname); + if(send_tcppacket(cl->nexthop, packet)) + terminate_connection(cl->nexthop, 1); + } + else + { + if(myself->options & OPTION_INDIRECT) + send_udppacket(cl->nexthop, packet); + else + { + hop = cl; - /* Since packet is on the stack of handle_tap_input(), - we have to make a copy of it first. */ + while(hop->options & OPTION_INDIRECT) + if(hop->lastbutonehop == myself) + break; + else + hop = hop->lastbutonehop; - copy = xmalloc(sizeof(vpn_packet_t)); - memcpy(copy, packet, sizeof(vpn_packet_t)); + send_udppacket(hop, packet); + } + } +} - list_insert_tail(cl->queue, copy); +/* Broadcast a packet to all active direct connections */ - if(!cl->status.waitingforkey) - send_req_key(myself, cl); /* Keys should be sent to the host running the tincd */ - return 0; - } +void broadcast_packet(connection_t *from, vpn_packet_t *packet) +{ + avl_node_t *node; + connection_t *cl; +cp + if(debug_lvl >= DEBUG_TRAFFIC) + syslog(LOG_INFO, _("Broadcasting packet of %d bytes from %s (%s)"), + packet->len, from->name, from->hostname); - /* Check if it has to go via UDP or TCP... */ + for(node = connection_tree->head; node; node = node->next) + { + cl = (connection_t *)node->data; + if(cl->status.active && cl != from) + send_packet(cl, packet); + } cp - if(cl->options & OPTION_TCPONLY) - return send_tcppacket(cl, packet); - else - return xsend(cl, packet); } void flush_queue(connection_t *cl) @@ -273,11 +305,11 @@ void flush_queue(connection_t *cl) cp if(debug_lvl >= DEBUG_TRAFFIC) syslog(LOG_INFO, _("Flushing queue for %s (%s)"), cl->name, cl->hostname); - + for(node = cl->queue->head; node; node = next) { next = node->next; - xsend(cl, (vpn_packet_t *)node->data); + send_udppacket(cl, (vpn_packet_t *)node->data); list_delete_node(cl->queue, node); } cp @@ -296,15 +328,20 @@ int setup_tap_fd(void) struct ifreq ifr; # endif #endif +#ifdef HAVE_SOLARIS + int ip_fd = -1, if_fd = -1; + int ppa; + char *ptr; +#endif -cp +cp if((cfg = get_config_val(config, config_tapdevice))) tapfname = cfg->data.ptr; else { #ifdef HAVE_LINUX # ifdef HAVE_TUNTAP - tapfname = "/dev/misc/net/tun"; + tapfname = "/dev/net/tun"; # else tapfname = "/dev/tap0"; # endif @@ -325,10 +362,8 @@ cp cp tap_fd = nfd; - taptype = TAP_TYPE_ETHERTAP; - /* Set default MAC address for ethertap devices */ - + mymac.type = SUBNET_MAC; mymac.net.mac.address.x[0] = 0xfe; mymac.net.mac.address.x[1] = 0xfd; @@ -348,14 +383,69 @@ cp cp if (!ioctl(tap_fd, TUNSETIFF, (void *) &ifr)) { - syslog(LOG_INFO, _("%s is a new style tun/tap device"), tapfname); + syslog(LOG_INFO, _("%s is a Linux tun/tap device"), tapfname); taptype = TAP_TYPE_TUNTAP; } + else + if (!ioctl(tap_fd, (('T'<< 8) | 202), (void *) &ifr)) + { + syslog(LOG_INFO, _("%s is a Linux tun/tap device"), tapfname); + syslog(LOG_WARNING, _("Old ioctl() request used")); + taptype = TAP_TYPE_TUNTAP; + } + else #endif + { + syslog(LOG_INFO, _("%s is a Linux ethertap device"), tapfname); + taptype = TAP_TYPE_ETHERTAP; + } #endif #ifdef HAVE_FREEBSD + syslog(LOG_INFO, _("%s is a FreeBSD tap device"), tapfname); taptype = TAP_TYPE_TUNTAP; #endif +#ifdef HAVE_SOLARIS + ppa = 0; + + ptr = tapfname; + while(*ptr && !isdigit((int)*ptr)) ptr++; + ppa = atoi(ptr); + + if( (ip_fd = open("/dev/ip", O_RDWR, 0)) < 0){ + syslog(LOG_ERR, _("Could not open /dev/ip: %m")); + return -1; + } + + /* Assign a new PPA and get its unit number. */ + if( (ppa = ioctl(nfd, TUNNEWPPA, ppa)) < 0){ + syslog(LOG_ERR, _("Can't assign new interface: %m")); + return -1; + } + + if( (if_fd = open(tapfname, O_RDWR, 0)) < 0){ + syslog(LOG_ERR, _("Could not open %s twice: %m"), tapfname); + return -1; + } + + if(ioctl(if_fd, I_PUSH, "ip") < 0){ + syslog(LOG_ERR, _("Can't push IP module: %m")); + return -1; + } + + /* Assign ppa according to the unit number returned by tun device */ + if(ioctl(if_fd, IF_UNITSEL, (char *)&ppa) < 0){ + syslog(LOG_ERR, _("Can't set PPA %d: %m"), ppa); + return -1; + } + + if(ioctl(ip_fd, I_LINK, if_fd) < 0){ + syslog(LOG_ERR, _("Can't link TUN device to IP: %m")); + return -1; + } + + syslog(LOG_INFO, _("%s is a Solaris tun device"), tapfname); +#endif + cp return 0; } @@ -387,15 +477,16 @@ cp } /* Optimize TCP settings */ - + option = 1; setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option)); setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, &option, sizeof(option)); +#ifdef HAVE_LINUX setsockopt(nfd, SOL_TCP, TCP_NODELAY, &option, sizeof(option)); option = IPTOS_LOWDELAY; setsockopt(nfd, SOL_IP, IP_TOS, &option, sizeof(option)); - + if((cfg = get_config_val(config, config_interface))) { if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, cfg->data.ptr, strlen(cfg->data.ptr))) @@ -405,11 +496,12 @@ cp return -1; } } +#endif memset(&a, 0, sizeof(a)); a.sin_family = AF_INET; a.sin_port = htons(port); - + if((cfg = get_config_val(config, config_interfaceip))) a.sin_addr.s_addr = htonl(cfg->data.ip->address); else @@ -516,16 +608,17 @@ cp } /* Optimize TCP settings */ - + option = 1; setsockopt(cl->meta_socket, SOL_SOCKET, SO_KEEPALIVE, &option, sizeof(option)); +#ifdef HAVE_LINUX setsockopt(cl->meta_socket, SOL_TCP, TCP_NODELAY, &option, sizeof(option)); option = IPTOS_LOWDELAY; setsockopt(cl->meta_socket, SOL_IP, IP_TOS, &option, sizeof(option)); - +#endif /* Connect */ - + a.sin_family = AF_INET; a.sin_port = htons(cl->port); a.sin_addr.s_addr = htonl(cl->address); @@ -560,7 +653,7 @@ cp */ int setup_outgoing_connection(char *name) { - connection_t *ncn; + connection_t *ncn, *old; struct hostent *h; config_t const *cfg; cp @@ -570,23 +663,37 @@ cp return -1; } + /* Make sure we don't make an outgoing connection to a host that is already in our connection list */ + + if((old = lookup_id(name))) + { + if(!old->status.outgoing) + { + if(debug_lvl >= DEBUG_CONNECTIONS) + syslog(LOG_NOTICE, _("We are already connected to %s."), name); + + old->status.outgoing = 1; + } + return 0; + } + ncn = new_connection(); asprintf(&ncn->name, "%s", name); - + if(read_host_config(ncn)) { syslog(LOG_ERR, _("Error reading host configuration file for %s"), ncn->name); free_connection(ncn); return -1; } - + if(!(cfg = get_config_val(ncn->config, config_address))) { syslog(LOG_ERR, _("No address specified for %s"), ncn->name); free_connection(ncn); return -1; } - + if(!(h = gethostbyname(cfg->data.ptr))) { syslog(LOG_ERR, _("Error looking up `%s': %m"), cfg->data.ptr); @@ -594,9 +701,9 @@ cp return -1; } - ncn->address = ntohl(*((ip_t*)(h->h_addr_list[0]))); + ncn->address = ntohl(*((ipv4_t*)(h->h_addr_list[0]))); ncn->hostname = hostlookup(htonl(ncn->address)); - + if(setup_outgoing_meta_socket(ncn) < 0) { syslog(LOG_ERR, _("Could not set up a meta connection to %s"), @@ -660,10 +767,10 @@ cp } else return -1; - } + } /* Else, check if a harnessed public key is in the config file */ - + asprintf(&fname, "%s/hosts/%s", confbase, cl->name); if((fp = fopen(fname, "r"))) { @@ -713,7 +820,7 @@ cp cfg->data.ptr); return -1; } - } + } else { syslog(LOG_ERR, _("No private key for tinc daemon specified!")); @@ -734,8 +841,8 @@ int setup_myself(void) cp myself = new_connection(); - asprintf(&myself->hostname, "MYSELF"); - myself->flags = 0; + asprintf(&myself->hostname, _("MYSELF")); + myself->options = 0; myself->protocol_version = PROT_CURRENT; if(!(cfg = get_config_val(config, config_name))) /* Not acceptable */ @@ -763,7 +870,7 @@ cp if(read_rsa_public_key(myself)) return -1; -cp +cp /* if(RSA_check_key(myself->rsa_key) != 1) @@ -777,14 +884,6 @@ cp else myself->port = cfg->data.val; - if((cfg = get_config_val(myself->config, config_indirectdata))) - if(cfg->data.val == stupid_true) - myself->flags |= EXPORTINDIRECTDATA; - - if((cfg = get_config_val(myself->config, config_tcponly))) - if(cfg->data.val == stupid_true) - myself->flags |= TCPONLY; - /* Read in all the subnets specified in the host configuration file */ for(next = myself->config; (cfg = get_config_val(next, config_subnet)); next = cfg->next) @@ -793,18 +892,60 @@ cp net->type = SUBNET_IPV4; net->net.ipv4.address = cfg->data.ip->address; net->net.ipv4.mask = cfg->data.ip->mask; - + /* Teach newbies what subnets are... */ - + if((net->net.ipv4.address & net->net.ipv4.mask) != net->net.ipv4.address) { syslog(LOG_ERR, _("Network address and subnet mask do not match!")); return -1; - } - + } + subnet_add(myself, net); } - + +cp + /* Check some options */ + + if((cfg = get_config_val(config, config_indirectdata))) + if(cfg->data.val == stupid_true) + myself->options |= OPTION_INDIRECT; + + if((cfg = get_config_val(config, config_tcponly))) + if(cfg->data.val == stupid_true) + myself->options |= OPTION_TCPONLY; + + if((cfg = get_config_val(myself->config, config_indirectdata))) + if(cfg->data.val == stupid_true) + myself->options |= OPTION_INDIRECT; + + if((cfg = get_config_val(myself->config, config_tcponly))) + if(cfg->data.val == stupid_true) + myself->options |= OPTION_TCPONLY; + + if(myself->options & OPTION_TCPONLY) + myself->options |= OPTION_INDIRECT; + + if((cfg = get_config_val(config, config_mode))) + { + if(!strcasecmp(cfg->data.ptr, "router")) + routing_mode = RMODE_ROUTER; + else if (!strcasecmp(cfg->data.ptr, "switch")) + routing_mode = RMODE_SWITCH; + else if (!strcasecmp(cfg->data.ptr, "hub")) + routing_mode = RMODE_HUB; + else + { + syslog(LOG_ERR, _("Invalid routing mode!")); + return -1; + } + } + else + routing_mode = RMODE_ROUTER; + +cp + /* Open sockets */ + if((myself->meta_socket = setup_listen_meta_socket(myself->port)) < 0) { syslog(LOG_ERR, _("Unable to set up a listening TCP socket!")); @@ -824,67 +965,63 @@ cp myself->cipher_pktkeylength = myself->cipher_pkttype->key_len + myself->cipher_pkttype->iv_len; myself->cipher_pktkey = (char *)xmalloc(myself->cipher_pktkeylength); - RAND_bytes(myself->cipher_pktkey, myself->cipher_pktkeylength); + RAND_pseudo_bytes(myself->cipher_pktkey, myself->cipher_pktkeylength); if(!(cfg = get_config_val(config, config_keyexpire))) keylifetime = 3600; else keylifetime = cfg->data.val; - + keyexpires = time(NULL) + keylifetime; cp - /* Check some options */ - - if((cfg = get_config_val(config, config_indirectdata))) - { - if(cfg->data.val == stupid_true) - myself->options |= OPTION_INDIRECT; - } - - if((cfg = get_config_val(config, config_tcponly))) - { - if(cfg->data.val == stupid_true) - myself->options |= OPTION_TCPONLY; - } - /* Activate ourselves */ + /* Done */ myself->status.active = 1; + id_add(myself); syslog(LOG_NOTICE, _("Ready: listening on port %hd"), myself->port); cp return 0; } +void randomized_alarm(int seconds) +{ + unsigned char r; + RAND_pseudo_bytes(&r, 1); + alarm((seconds * (int)r) / 128 + 1); +} + RETSIGTYPE -sigalrm_handler(int a) +try_outgoing_connections(int a) { config_t const *cfg; + int retry = 0; cp - cfg = get_config_val(upstreamcfg, config_connectto); - - if(!cfg && upstreamcfg == config) - /* No upstream IP given, we're listen only. */ - return; + cfg = get_config_val(config, config_connectto); while(cfg) { - upstreamcfg = cfg->next; - if(!setup_outgoing_connection(cfg->data.ptr)) /* function returns 0 when there are no problems */ - { - signal(SIGALRM, SIG_IGN); - return; - } - cfg = get_config_val(upstreamcfg, config_connectto); /* Or else we try the next ConnectTo line */ + if(setup_outgoing_connection(cfg->data.ptr)) /* function returns 0 when there are no problems */ + retry = 1; + cfg = get_config_val(cfg, config_connectto); /* Or else we try the next ConnectTo line */ } - signal(SIGALRM, sigalrm_handler); - upstreamcfg = config; - seconds_till_retry += 5; - if(seconds_till_retry > MAXTIMEOUT) /* Don't wait more than MAXTIMEOUT seconds. */ - seconds_till_retry = MAXTIMEOUT; - syslog(LOG_ERR, _("Still failed to connect to other, will retry in %d seconds"), - seconds_till_retry); - alarm(seconds_till_retry); + if(retry) + { + seconds_till_retry += 5; + if(seconds_till_retry > MAXTIMEOUT) /* Don't wait more than MAXTIMEOUT seconds. */ + seconds_till_retry = MAXTIMEOUT; + + syslog(LOG_ERR, _("Failed to setup all outgoing connections, will retry in %d seconds"), + seconds_till_retry); + + /* Randomize timeout to avoid global synchronisation effects */ + randomized_alarm(seconds_till_retry); + } + else + { + seconds_till_retry = 5; + } cp } @@ -914,33 +1051,12 @@ cp /* Run tinc-up script to further initialize the tap interface */ execute_script("tinc-up"); - - if(setup_myself() < 0) - return -1; - - if(!(cfg = get_config_val(config, config_connectto))) - /* No upstream IP given, we're listen only. */ - return 0; - while(cfg) - { - upstreamcfg = cfg->next; - if(!setup_outgoing_connection(cfg->data.ptr)) /* function returns 0 when there are no problems */ - return 0; - cfg = get_config_val(upstreamcfg, config_connectto); /* Or else we try the next ConnectTo line */ - } - - if(do_detach) - { - signal(SIGALRM, sigalrm_handler); - upstreamcfg = config; - seconds_till_retry = MAXTIMEOUT; - syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in %d seconds"), seconds_till_retry); - alarm(seconds_till_retry); - } - else + if(setup_myself() < 0) return -1; + signal(SIGALRM, try_outgoing_connections); + alarm(5); cp return 0; } @@ -950,31 +1066,24 @@ cp */ void close_network_connections(void) { - avl_node_t *node; + avl_node_t *node, *next; connection_t *p; cp - for(node = connection_tree->head; node; node = node->next) + for(node = connection_tree->head; node; node = next) { + next = node->next; p = (connection_t *)node->data; p->status.outgoing = 0; - p->status.active = 0; - terminate_connection(p); + terminate_connection(p, 0); } - if(myself) - if(myself->status.active) - { - close(myself->meta_socket); - free_connection(myself); - myself = NULL; - } + terminate_connection(myself, 0); - close(tap_fd); + destroy_trees(); - /* Execute tinc-down script right after shutting down the interface */ execute_script("tinc-down"); - destroy_connection_tree(); + close(tap_fd); cp return; } @@ -999,7 +1108,7 @@ cp return NULL; } - p->name = unknown; + asprintf(&p->name, _("UNKNOWN")); p->address = ntohl(ci.sin_addr.s_addr); p->hostname = hostlookup(ci.sin_addr.s_addr); p->port = htons(ci.sin_port); /* This one will be overwritten later */ @@ -1008,7 +1117,7 @@ cp p->buffer = xmalloc(MAXBUFSIZE); p->buflen = 0; p->last_ping_time = time(NULL); - + if(debug_lvl >= DEBUG_CONNECTIONS) syslog(LOG_NOTICE, _("Connection from %s port %d"), p->hostname, htons(ci.sin_port)); @@ -1033,8 +1142,7 @@ cp for(node = connection_tree->head; node; node = node->next) { p = (connection_t *)node->data; - if(p->status.meta) - FD_SET(p->meta_socket, fs); + FD_SET(p->meta_socket, fs); } FD_SET(myself->meta_socket, fs); @@ -1047,11 +1155,10 @@ cp udp socket and write it to the ethertap device after being decrypted */ -int handle_incoming_vpn_data(void) +void handle_incoming_vpn_data(void) { vpn_packet_t pkt; int x, l = sizeof(x); - int lenin; struct sockaddr_in from; socklen_t fromlen = sizeof(from); connection_t *cl; @@ -1060,43 +1167,43 @@ cp { syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"), __FILE__, __LINE__, myself->socket); - return -1; + return; } if(x) { syslog(LOG_ERR, _("Incoming data socket error: %s"), strerror(x)); - return -1; + return; } - if((lenin = recvfrom(myself->socket, (char *) &(pkt.len), MTU, 0, (struct sockaddr *)&from, &fromlen)) <= 0) + if((pkt.len = recvfrom(myself->socket, (char *) pkt.salt, MTU, 0, (struct sockaddr *)&from, &fromlen)) <= 0) { syslog(LOG_ERR, _("Receiving packet failed: %m")); - return -1; + return; } - cl = lookup_connection(ntohl(from.sin_addr.s_addr), ntohs(from.sin_port)); - + cl = lookup_active(ntohl(from.sin_addr.s_addr), ntohs(from.sin_port)); + if(!cl) { syslog(LOG_WARNING, _("Received UDP packets on port %hd from unknown source %x:%hd"), myself->port, ntohl(from.sin_addr.s_addr), ntohs(from.sin_port)); - return 0; + return; } - if(debug_lvl >= DEBUG_TRAFFIC) - { - syslog(LOG_DEBUG, _("Received packet of %d bytes from %s (%s)"), lenin, - cl->name, cl->hostname); - } + cl->last_ping_time = time(NULL); + receive_udppacket(cl, &pkt); cp - return xrecv(cl, &pkt); } /* - terminate a connection and notify the other - end before closing the sockets + Terminate a connection: + - Close the sockets + - Remove associated hosts and subnets + - Deactivate the host + - Since it might still be referenced, put it on the prune list. + - If report == 1, then send DEL_HOST messages to the other tinc daemons. */ -void terminate_connection(connection_t *cl) +void terminate_connection(connection_t *cl, int report) { connection_t *p; subnet_t *subnet; @@ -1104,42 +1211,47 @@ void terminate_connection(connection_t *cl) cp if(cl->status.remove) return; + else + cl->status.remove = 1; - if(debug_lvl >= DEBUG_CONNECTIONS) - syslog(LOG_NOTICE, _("Closing connection with %s (%s)"), - cl->name, cl->hostname); - - cl->status.remove = 1; - if(cl->socket) close(cl->socket); - if(cl->status.meta) + if(cl->meta_socket) close(cl->meta_socket); + connection_del(cl); + if(cl->status.meta) { - - /* Find all connections that were lost because they were behind cl - (the connection that was dropped). */ - - for(node = connection_tree->head; node; node = node->next) - { - p = (connection_t *)node->data; - if(p->nexthop == cl && p != cl) - terminate_connection(p); - } - - /* Inform others of termination if it was still active */ + if(debug_lvl >= DEBUG_CONNECTIONS) + syslog(LOG_NOTICE, _("Closing connection with %s (%s)"), + cl->name, cl->hostname); if(cl->status.active) - for(node = connection_tree->head; node; node = node->next) - { - p = (connection_t *)node->data; - if(p->status.meta && p->status.active && p != cl) - send_del_host(p, cl); /* Sounds like recursion, but p does not have a meta connection :) */ - } + { + /* Find all connections that were lost because they were behind cl + (the connection that was dropped). */ + + for(node = active_tree->head; node; node = next) + { + next = node->next; + p = (connection_t *)node->data; + if(p->nexthop == cl) + terminate_connection(p, report); + } + } } + /* Inform others of termination if needed */ + + if(report) + for(node = connection_tree->head; node; node = node->next) + { + p = (connection_t *)node->data; + if(p->status.active) + send_del_host(p, cl); /* Sounds like recursion, but p does not have a meta connection :) */ + } + /* Remove the associated subnets */ for(node = cl->subnet_tree->head; node; node = next) @@ -1150,20 +1262,18 @@ cp } /* Check if this was our outgoing connection */ - + if(cl->status.outgoing) { cl->status.outgoing = 0; - signal(SIGALRM, sigalrm_handler); - seconds_till_retry = 5; + signal(SIGALRM, try_outgoing_connections); alarm(seconds_till_retry); - syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in 5 seconds")); + syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in %d seconds"), seconds_till_retry); } - - /* Inactivate */ - - cl->status.active = 0; cp + /* Schedule it for pruning */ + + prune_add(cl); } /* @@ -1185,7 +1295,7 @@ cp for(node = connection_tree->head; node; node = node->next) { cl = (connection_t *)node->data; - if(cl->status.active && cl->status.meta) + if(cl->status.active) { if(cl->last_ping_time + timeout < now) { @@ -1195,7 +1305,7 @@ cp syslog(LOG_INFO, _("%s (%s) didn't respond to PING"), cl->name, cl->hostname); cl->status.timeout = 1; - terminate_connection(cl); + terminate_connection(cl, 1); } else { @@ -1232,7 +1342,7 @@ cp } connection_add(ncn); - + send_id(ncn); cp return 0; @@ -1257,15 +1367,14 @@ cp if(p->status.remove) return; - if(p->status.meta) - if(FD_ISSET(p->meta_socket, f)) - if(receive_meta(p) < 0) - { - terminate_connection(p); - return; - } + if(FD_ISSET(p->meta_socket, f)) + if(receive_meta(p) < 0) + { + terminate_connection(p, p->status.meta); + return; + } } - + if(FD_ISSET(myself->meta_socket, f)) handle_new_meta_connection(); cp @@ -1279,7 +1388,19 @@ void handle_tap_input(void) { vpn_packet_t vp; int lenin; -cp +cp +#ifdef HAVE_SOLARIS + if((lenin = read(tap_fd, vp.data + 14, MTU)) <= 0) + { + syslog(LOG_ERR, _("Error while reading from tun device: %m")); + return; + } + memcpy(vp.data, mymac.net.mac.address.x, 6); + memcpy(vp.data + 6, mymac.net.mac.address.x, 6); + vp.data[12] = 0x08; + vp.data[13] = 0x00; + vp.len = lenin + 14; +#else if(taptype == TAP_TYPE_TUNTAP) { if((lenin = read(tap_fd, vp.data, MTU)) <= 0) @@ -1298,8 +1419,9 @@ cp } vp.len = lenin - 2; } +#endif - total_tap_in += lenin; + total_tap_in += vp.len; if(lenin < 32) { @@ -1313,7 +1435,7 @@ cp syslog(LOG_DEBUG, _("Read packet of length %d from tap device"), vp.len); } - send_packet(ntohl(*((unsigned long*)(&vp.data[30]))), &vp); + route_outgoing(&vp); cp } @@ -1335,7 +1457,7 @@ cp tv.tv_sec = timeout; tv.tv_usec = 0; - prune_connection_tree(); + prune_flush(); build_fdset(&fset); if((r = select(FD_SETSIZE, &fset, NULL, NULL, &tv)) < 0) @@ -1361,10 +1483,10 @@ cp } sleep(5); - + if(setup_network_connections()) return; - + continue; } @@ -1383,8 +1505,8 @@ cp { if(debug_lvl >= DEBUG_STATUS) syslog(LOG_INFO, _("Regenerating symmetric key")); - - RAND_bytes(myself->cipher_pktkey, myself->cipher_pktkeylength); + + RAND_pseudo_bytes(myself->cipher_pktkey, myself->cipher_pktkeylength); send_key_changed(myself, NULL); keyexpires = time(NULL) + keylifetime; }