X-Git-Url: https://git.librecmc.org/?p=oweals%2Ftinc.git;a=blobdiff_plain;f=src%2Fnet.c;h=8d92cc10088c305ded504ce6246648a9ba2f163e;hp=81b302960c2b3206b9f002ffe4e1fc3da12dbe30;hb=485f7a5043a4b3345bd02e5063502603550b4c76;hpb=8738c007b15eea024bc4ca6ee0f972b2f5bf259f diff --git a/src/net.c b/src/net.c index 81b3029..8d92cc1 100644 --- a/src/net.c +++ b/src/net.c @@ -17,27 +17,47 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: net.c,v 1.35.4.48 2000/10/28 21:25:20 guus Exp $ + $Id: net.c,v 1.35.4.76 2000/11/16 22:11:40 zarq Exp $ */ #include "config.h" -#include #include #include -#include -#include #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_OPENSSL_RAND_H +# include +#else +# include +#endif + +#ifdef HAVE_OPENSSL_EVP_H +# include +#else +# include +#endif + +#ifdef HAVE_OPENSSL_ERR_H +# include +#else +# include +#endif #ifdef HAVE_TUNTAP #include LINUX_IF_TUN_H @@ -47,11 +67,14 @@ #include #include "conf.h" -#include "encr.h" +#include "connlist.h" +#include "list.h" +#include "meta.h" #include "net.h" #include "netutl.h" +#include "process.h" #include "protocol.h" -#include "meta.h" +#include "subnet.h" #include "system.h" @@ -65,59 +88,39 @@ int total_socket_out = 0; config_t *upstreamcfg; static int seconds_till_retry; -char *unknown = NULL; +int keylifetime = 0; +int keyexpires = 0; -/* - strip off the MAC adresses of an ethernet frame -*/ -void strip_mac_addresses(vpn_packet_t *p) -{ -cp - memmove(p->data, p->data + 12, p->len -= 12); -cp -} +char *unknown = NULL; -/* - reassemble MAC addresses -*/ -void add_mac_addresses(vpn_packet_t *p) -{ -cp - memcpy(p->data + 12, p->data, p->len); - p->len += 12; - p->data[0] = p->data[6] = 0xfe; - p->data[1] = p->data[7] = 0xfd; - /* Really evil pointer stuff just below! */ - *((ip_t*)(&p->data[2])) = (ip_t)(htonl(myself->address)); - *((ip_t*)(&p->data[8])) = *((ip_t*)(&p->data[26])); -cp -} +subnet_t mymac; int xsend(conn_list_t *cl, vpn_packet_t *inpkt) { vpn_packet_t outpkt; int outlen, outpad; + EVP_CIPHER_CTX ctx; cp outpkt.len = inpkt->len; -/* - EVP_EncryptInit(cl->cipher_pktctx, cl->cipher_pkttype, cl->cipher_pktkey, NULL); - EVP_EncryptUpdate(cl->cipher_pktctx, outpkt.data, &outlen, inpkt->data, inpkt->len); - EVP_EncryptFinal(cl->cipher_pktctx, outpkt.data + outlen, &outpad); + + /* 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; - Do encryption when everything else is fixed... -*/ +/* Bypass outlen = outpkt.len + 2; memcpy(&outpkt, inpkt, outlen); - +*/ + if(debug_lvl >= DEBUG_TRAFFIC) syslog(LOG_ERR, _("Sending packet of %d bytes to %s (%s)"), outlen, cl->name, cl->hostname); total_socket_out += outlen; - cl->want_ping = 1; - if((send(cl->socket, (char *) &(outpkt.len), outlen, 0)) < 0) { syslog(LOG_ERR, _("Error sending packet to %s (%s): %m"), @@ -128,26 +131,33 @@ cp return 0; } -int xrecv(vpn_packet_t *inpkt) +int xrecv(conn_list_t *cl, vpn_packet_t *inpkt) { vpn_packet_t outpkt; int outlen, outpad; + EVP_CIPHER_CTX ctx; cp outpkt.len = inpkt->len; -/* - EVP_DecryptInit(myself->cipher_pktctx, myself->cipher_pkttype, myself->cipher_pktkey, NULL); - EVP_DecryptUpdate(myself->cipher_pktctx, outpkt.data, &outlen, inpkt->data, inpkt->len); - EVP_DecryptFinal(myself->cipher_pktctx, outpkt.data + outlen, &outpad); + + /* 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); outlen += outpad; - Do decryption is everything else is fixed... -*/ +/* Bypass outlen = outpkt.len+2; memcpy(&outpkt, inpkt, outlen); +*/ - /* FIXME sometime - add_mac_addresses(&outpkt); - */ + if(debug_lvl >= DEBUG_TRAFFIC) + syslog(LOG_ERR, _("Writing packet of %d bytes to tap device"), + outpkt.len, outlen); + + /* Fix mac address */ + + memcpy(outpkt.data, mymac.net.mac.address.x, 6); if(taptype == TAP_TYPE_TUNTAP) { @@ -245,7 +255,7 @@ cp returned a zero exit code */ void flush_queue(conn_list_t *cl, packet_queue_t **pq, - int (*function)(conn_list_t*,void*)) + int (*function)(conn_list_t*,vpn_packet_t*)) { queue_element_t *p, *next = NULL; cp @@ -307,14 +317,27 @@ cp } return -1; - } + } 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)); + } + + return -1; + } + /* If we ourselves have indirectdata flag set, we should send only to our uplink! */ /* FIXME - check for indirection and reprogram it The Right Way(tm) this time. */ + /* Connections are now opened beforehand... + if(!cl->status.dataopen) if(setup_vpn_connection(cl) < 0) { @@ -322,10 +345,11 @@ cp cl->name, cl->hostname); return -1; } + */ if(!cl->status.validkey) { -/* Don't queue until everything else is fixed. +/* FIXME: Don't queue until everything else is fixed. if(debug_lvl >= DEBUG_TRAFFIC) syslog(LOG_INFO, _("No valid key known yet for %s (%s), queueing packet"), cl->name, cl->hostname); @@ -338,7 +362,7 @@ cp if(!cl->status.active) { -/* Don't queue until everything else is fixed. +/* FIXME: Don't queue until everything else is fixed. if(debug_lvl >= DEBUG_TRAFFIC) syslog(LOG_INFO, _("%s (%s) is not ready, queueing packet"), cl->name, cl->hostname); @@ -360,11 +384,9 @@ int setup_tap_fd(void) int nfd; const char *tapfname; config_t const *cfg; - char *envvar; - struct ifreq ifr; cp - if((cfg = get_config_val(config, tapdevice))) + if((cfg = get_config_val(config, config_tapdevice))) tapfname = cfg->data.ptr; else #ifdef HAVE_TUNTAP @@ -381,7 +403,16 @@ cp cp tap_fd = nfd; + /* Set default MAC address for ethertap devices */ + taptype = TAP_TYPE_ETHERTAP; + mymac.type = SUBNET_MAC; + mymac.net.mac.address.x[0] = 0xfe; + mymac.net.mac.address.x[1] = 0xfd; + mymac.net.mac.address.x[2] = 0x00; + mymac.net.mac.address.x[3] = 0x00; + mymac.net.mac.address.x[4] = 0x00; + mymac.net.mac.address.x[5] = 0x00; #ifdef HAVE_TUNTAP /* Ok now check if this is an old ethertap or a new tun/tap thingie */ @@ -392,24 +423,11 @@ cp strncpy(ifr.ifr_name, netname, IFNAMSIZ); cp if (!ioctl(tap_fd, TUNSETIFF, (void *) &ifr)) - { + { syslog(LOG_INFO, _("%s is a new style tun/tap device"), tapfname); taptype = TAP_TYPE_TUNTAP; - - if((cfg = get_config_val(config, tapsubnet)) == NULL) - syslog(LOG_INFO, _("tun/tap device will be left unconfigured")); - else - /* Setup inetaddr/netmask etc */; } #endif - - /* Add name of network interface to environment (for scripts) */ - - ioctl(tap_fd, SIOCGIFNAME, (void *) &ifr); - asprintf(&envvar, "IFNAME=%s", ifr.ifr_name); - putenv(envvar); - free(envvar); - cp return 0; } @@ -433,27 +451,34 @@ cp if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) { - syslog(LOG_ERR, _("setsockopt: %m")); + close(nfd); + syslog(LOG_ERR, _("System call `%s' failed: %m"), + "setsockopt"); return -1; } if(setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one))) { - syslog(LOG_ERR, _("setsockopt: %m")); + close(nfd); + syslog(LOG_ERR, _("System call `%s' failed: %m"), + "setsockopt"); return -1; } flags = fcntl(nfd, F_GETFL); if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) { - syslog(LOG_ERR, _("fcntl: %m")); + close(nfd); + syslog(LOG_ERR, _("System call `%s' failed: %m"), + "fcntl"); return -1; } - if((cfg = get_config_val(config, interface))) + if((cfg = get_config_val(config, config_interface))) { if(setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, cfg->data.ptr, strlen(cfg->data.ptr))) { + close(nfd); syslog(LOG_ERR, _("Unable to bind listen socket to interface %s: %m"), cfg->data.ptr); return -1; } @@ -463,20 +488,23 @@ cp a.sin_family = AF_INET; a.sin_port = htons(port); - if((cfg = get_config_val(config, interfaceip))) + if((cfg = get_config_val(config, config_interfaceip))) a.sin_addr.s_addr = htonl(cfg->data.ip->address); else a.sin_addr.s_addr = htonl(INADDR_ANY); if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr))) { + close(nfd); syslog(LOG_ERR, _("Can't bind to port %hd/tcp: %m"), port); return -1; } if(listen(nfd, 3)) { - syslog(LOG_ERR, _("listen: %m")); + close(nfd); + syslog(LOG_ERR, _("System call `%s' failed: %m"), + "listen"); return -1; } cp @@ -495,20 +523,25 @@ int setup_vpn_in_socket(int port) cp if((nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) { + close(nfd); syslog(LOG_ERR, _("Creating socket failed: %m")); return -1; } if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) { - syslog(LOG_ERR, _("setsockopt: %m")); + close(nfd); + syslog(LOG_ERR, _("System call `%s' failed: %m"), + "setsockopt"); return -1; } flags = fcntl(nfd, F_GETFL); if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) { - syslog(LOG_ERR, _("fcntl: %m")); + close(nfd); + syslog(LOG_ERR, _("System call `%s' failed: %m"), + "fcntl"); return -1; } @@ -519,6 +552,7 @@ cp if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr))) { + close(nfd); syslog(LOG_ERR, _("Can't bind to port %hd/udp: %m"), port); return -1; } @@ -538,7 +572,7 @@ cp if(debug_lvl >= DEBUG_CONNECTIONS) syslog(LOG_INFO, _("Trying to connect to %s"), cl->hostname); - if((cfg = get_config_val(cl->config, port)) == NULL) + if((cfg = get_config_val(cl->config, config_port)) == NULL) cl->port = 655; else cl->port = cfg->data.val; @@ -557,6 +591,7 @@ cp if(connect(cl->meta_socket, (struct sockaddr *)&a, sizeof(a)) == -1) { + close(cl->meta_socket); syslog(LOG_ERR, _("%s port %hd: %m"), cl->hostname, cl->port); return -1; } @@ -564,6 +599,7 @@ cp flags = fcntl(cl->meta_socket, F_GETFL); if(fcntl(cl->meta_socket, F_SETFL, flags | O_NONBLOCK) < 0) { + close(cl->meta_socket); syslog(LOG_ERR, _("fcntl for %s port %d: %m"), cl->hostname, cl->port); return -1; @@ -589,7 +625,7 @@ int setup_outgoing_connection(char *name) { conn_list_t *ncn; struct hostent *h; - config_t *cfg; + config_t const *cfg; cp if(check_id(name)) { @@ -607,7 +643,7 @@ cp return -1; } - if(!(cfg = get_config_val(ncn->config, address))) + if(!(cfg = get_config_val(ncn->config, config_address))) { syslog(LOG_ERR, _("No address specified for %s")); free_conn_list(ncn); @@ -636,7 +672,6 @@ cp ncn->buffer = xmalloc(MAXBUFSIZE); ncn->buflen = 0; ncn->last_ping_time = time(NULL); - ncn->want_ping = 0; conn_list_add(ncn); @@ -651,8 +686,8 @@ cp int setup_myself(void) { config_t const *cfg; + config_t *next; subnet_t *net; - int i; cp myself = new_conn_list(); @@ -660,7 +695,7 @@ cp myself->flags = 0; myself->protocol_version = PROT_CURRENT; - if(!(cfg = get_config_val(config, tincname))) /* Not acceptable */ + if(!(cfg = get_config_val(config, config_name))) /* Not acceptable */ { syslog(LOG_ERR, _("Name for tinc daemon required!")); return -1; @@ -674,7 +709,7 @@ cp return -1; } cp - if(!(cfg = get_config_val(config, privatekey))) + if(!(cfg = get_config_val(config, config_privatekey))) { syslog(LOG_ERR, _("Private key for tinc daemon required!")); return -1; @@ -692,7 +727,7 @@ cp return -1; } cp - if(!(cfg = get_config_val(myself->config, publickey))) + if(!(cfg = get_config_val(myself->config, config_publickey))) { syslog(LOG_ERR, _("Public key for tinc daemon required!")); return -1; @@ -708,28 +743,36 @@ cp return -1; } */ - if(!(cfg = get_config_val(myself->config, port))) + if(!(cfg = get_config_val(myself->config, config_port))) myself->port = 655; else myself->port = cfg->data.val; - if((cfg = get_config_val(myself->config, indirectdata))) + 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, tcponly))) + 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(cfg = myself->config; cfg = get_config_val(cfg, subnet); cfg = cfg->next) + for(next = myself->config; (cfg = get_config_val(next, config_subnet)); next = cfg->next) { net = new_subnet(); 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); } @@ -739,16 +782,29 @@ cp return -1; } - if((myself->socket = setup_vpn_in_socket(myself->port)) < 0) - { - syslog(LOG_ERR, _("Unable to set up an incoming vpn data socket!")); - close(myself->meta_socket); - return -1; - } + /* Generate packet encryption key */ + + myself->cipher_pkttype = EVP_bf_cfb(); + + 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); + if(!(cfg = get_config_val(config, config_keyexpire))) + keylifetime = 3600; + else + keylifetime = cfg->data.val; + + keyexpires = time(NULL) + keylifetime; + + /* Activate ourselves */ + myself->status.active = 1; syslog(LOG_NOTICE, _("Ready: listening on port %hd"), myself->port); + + child_pids = list_new(); cp return 0; } @@ -758,7 +814,7 @@ sigalrm_handler(int a) { config_t const *cfg; cp - cfg = get_config_val(upstreamcfg, connectto); + cfg = get_config_val(upstreamcfg, config_connectto); if(!cfg && upstreamcfg == config) /* No upstream IP given, we're listen only. */ @@ -772,7 +828,7 @@ cp signal(SIGALRM, SIG_IGN); return; } - cfg = get_config_val(upstreamcfg, connectto); /* Or else we try the next ConnectTo line */ + cfg = get_config_val(upstreamcfg, config_connectto); /* Or else we try the next ConnectTo line */ } signal(SIGALRM, sigalrm_handler); @@ -792,12 +848,17 @@ cp int setup_network_connections(void) { config_t const *cfg; - char *scriptname; cp - if((cfg = get_config_val(config, pingtimeout)) == NULL) - timeout = 5; + if((cfg = get_config_val(config, config_pingtimeout)) == NULL) + timeout = 60; else - timeout = cfg->data.val; + { + timeout = cfg->data.val; + if(timeout < 1) + { + timeout = 86400; + } + } if(setup_tap_fd() < 0) return -1; @@ -806,23 +867,9 @@ cp return -1; /* Run tinc-up script to further initialize the tap interface */ - - asprintf(&scriptname, "%s/tinc-up", confbase); - - if(!fork()) - { - - execl(scriptname, NULL); - - if(errno != ENOENT) - syslog(LOG_WARNING, _("Error while executing %s: %m"), scriptname); - - exit(0); - } - - free(scriptname); - - if(!(cfg = get_config_val(config, connectto))) + execute_script("tinc-up"); + + if(!(cfg = get_config_val(config, config_connectto))) /* No upstream IP given, we're listen only. */ return 0; @@ -831,7 +878,7 @@ cp 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, connectto); /* Or else we try the next ConnectTo line */ + cfg = get_config_val(upstreamcfg, config_connectto); /* Or else we try the next ConnectTo line */ } signal(SIGALRM, sigalrm_handler); @@ -849,47 +896,26 @@ cp void close_network_connections(void) { conn_list_t *p; - char *scriptname; cp for(p = conn_list; p != NULL; p = p->next) { - if(p->status.dataopen) - { - shutdown(p->socket, 0); /* No more receptions */ - close(p->socket); - } - if(p->status.meta) - { - send_termreq(p); - shutdown(p->meta_socket, 0); /* No more receptions */ - close(p->meta_socket); - } + p->status.active = 0; + terminate_connection(p); } if(myself) if(myself->status.active) { close(myself->meta_socket); - close(myself->socket); + free_conn_list(myself); + myself = NULL; } - /* Execute tinc-down script right before shutting down the interface */ - - asprintf(&scriptname, "%s/tinc-down", confbase); - - if(!fork()) - { - execl(scriptname, NULL); - - if(errno != ENOENT) - syslog(LOG_WARNING, _("Error while executing %s: %m"), scriptname); + close(tap_fd); - exit(0); - } - - free(scriptname); + /* Execute tinc-down script right after shutting down the interface */ + execute_script("tinc-down"); - close(tap_fd); destroy_conn_list(); syslog(LOG_NOTICE, _("Terminating")); @@ -904,6 +930,7 @@ int setup_vpn_connection(conn_list_t *cl) { int nfd, flags; struct sockaddr_in a; + const int one = 1; cp if(debug_lvl >= DEBUG_TRAFFIC) syslog(LOG_DEBUG, _("Opening UDP socket to %s"), cl->hostname); @@ -915,12 +942,42 @@ cp return -1; } + if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) + { + close(nfd); + syslog(LOG_ERR, _("System call `%s' failed: %m"), + "setsockopt"); + 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: %m"), + "fcntl"); + return -1; + } + + memset(&a, 0, sizeof(a)); + a.sin_family = AF_INET; + a.sin_port = htons(myself->port); + a.sin_addr.s_addr = htonl(INADDR_ANY); + + if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr))) + { + close(nfd); + syslog(LOG_ERR, _("Can't bind to port %hd/udp: %m"), myself->port); + return -1; + } + a.sin_family = AF_INET; a.sin_port = htons(cl->port); a.sin_addr.s_addr = htonl(cl->address); if(connect(nfd, (struct sockaddr *)&a, sizeof(a)) == -1) { + close(nfd); syslog(LOG_ERR, _("Connecting to %s port %d failed: %m"), cl->hostname, cl->port); return -1; @@ -929,6 +986,7 @@ cp flags = fcntl(nfd, F_GETFL); if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) { + close(nfd); syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, nfd, cl->name, cl->hostname); return -1; @@ -952,9 +1010,10 @@ conn_list_t *create_new_connection(int sfd) cp p = new_conn_list(); - if(getpeername(sfd, &ci, &len) < 0) + if(getpeername(sfd, (struct sockaddr *) &ci, (socklen_t *) &len) < 0) { - syslog(LOG_ERR, _("Error: getpeername: %m")); + syslog(LOG_ERR, _("System call `%s' failed: %m"), + "getpeername"); return NULL; } @@ -966,7 +1025,6 @@ cp p->buffer = xmalloc(MAXBUFSIZE); p->buflen = 0; p->last_ping_time = time(NULL); - p->want_ping = 0; if(debug_lvl >= DEBUG_CONNECTIONS) syslog(LOG_NOTICE, _("Connection from %s port %d"), @@ -995,7 +1053,6 @@ cp } FD_SET(myself->meta_socket, fs); - FD_SET(myself->socket, fs); FD_SET(tap_fd, fs); cp } @@ -1005,18 +1062,16 @@ cp udp socket and write it to the ethertap device after being decrypted */ -int handle_incoming_vpn_data() +int handle_incoming_vpn_data(conn_list_t *cl) { vpn_packet_t pkt; - int lenin; int x, l = sizeof(x); - struct sockaddr from; - socklen_t fromlen = sizeof(from); + int lenin; cp - if(getsockopt(myself->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0) + if(getsockopt(cl->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0) { syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m"), - __FILE__, __LINE__, myself->socket); + __FILE__, __LINE__, cl->socket); return -1; } if(x) @@ -1025,20 +1080,20 @@ cp return -1; } - if(recvfrom(myself->socket, (char *) &(pkt.len), MTU, 0, &from, &fromlen) <= 0) + if((lenin = recv(cl->socket, (char *) &(pkt.len), MTU, 0)) <= 0) { syslog(LOG_ERR, _("Receiving packet failed: %m")); return -1; } -/* + if(debug_lvl >= DEBUG_TRAFFIC) { - syslog(LOG_DEBUG, _("Received packet of %d bytes from %d.%d.%d.%d"), pkt.len, - from.sa_addr[0], from.sa_addr[1], from.sa_addr[2], from.sa_addr[3]); - } -*/ + syslog(LOG_DEBUG, _("Received packet of %d bytes from %s (%s)"), lenin, + cl->name, cl->hostname); + } + cp - return xrecv(&pkt); + return xrecv(cl, &pkt); } /* @@ -1048,11 +1103,13 @@ cp void terminate_connection(conn_list_t *cl) { conn_list_t *p; - + subnet_t *s; cp if(cl->status.remove) return; + cl->status.remove = 1; + if(debug_lvl >= DEBUG_CONNECTIONS) syslog(LOG_NOTICE, _("Closing connection with %s (%s)"), cl->name, cl->hostname); @@ -1062,43 +1119,40 @@ cp if(cl->status.meta) close(cl->meta_socket); - cl->status.remove = 1; - - /* If this cl isn't active, don't send any DEL_HOSTs. */ - -/* FIXME: reprogram this. - if(cl->status.active) - notify_others(cl,NULL,send_del_host); -*/ - cp /* Find all connections that were lost because they were behind cl (the connection that was dropped). */ + if(cl->status.meta) for(p = conn_list; p != NULL; p = p->next) - { - if((p->nexthop == cl) && (p != cl)) - { - if(cl->status.active && p->status.active) -/* FIXME: reprogram this - notify_others(p,cl,send_del_host); -*/; - if(cl->socket) - close(cl->socket); - p->status.active = 0; - p->status.remove = 1; - } - } + if((p->nexthop == cl) && (p != cl)) + terminate_connection(p); /* Sounds like recursion, but p does not have a meta connection :) */ + + /* Inform others of termination if it was still active */ + + if(cl->status.active) + for(p = conn_list; p != NULL; p = p->next) + if(p->status.meta && p->status.active && p!=cl) + send_del_host(p, cl); + + /* Remove the associated subnets */ + + for(s = cl->subnets; s; s = s->next) + subnet_del(s); + + /* Check if this was our outgoing connection */ - cl->status.active = 0; - - if(cl->status.outgoing) + if(cl->status.outgoing && cl->status.active) { signal(SIGALRM, sigalrm_handler); seconds_till_retry = 5; alarm(seconds_till_retry); syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in 5 seconds")); } + + /* Inactivate */ + + cl->status.active = 0; cp } @@ -1118,13 +1172,11 @@ cp now = time(NULL); for(p = conn_list; p != NULL; p = p->next) { - if(p->status.remove) - continue; if(p->status.active && p->status.meta) { if(p->last_ping_time + timeout < now) { - if(p->status.pinged && !p->status.got_pong) + if(p->status.pinged) { if(debug_lvl >= DEBUG_PROTOCOL) syslog(LOG_INFO, _("%s (%s) didn't respond to PING"), @@ -1132,12 +1184,9 @@ cp p->status.timeout = 1; terminate_connection(p); } - else if(p->want_ping) + else { send_ping(p); - p->last_ping_time = now; - p->status.pinged = 1; - p->status.got_pong = 0; } } } @@ -1170,9 +1219,7 @@ cp return 0; } - ncn->status.meta = 1; - ncn->next = conn_list; - conn_list = ncn; + conn_list_add(ncn); cp return 0; } @@ -1184,7 +1231,6 @@ cp void check_network_activity(fd_set *f) { conn_list_t *p; - int x, l = sizeof(x); cp for(p = conn_list; p != NULL; p = p->next) { @@ -1194,16 +1240,15 @@ cp if(p->status.dataopen) if(FD_ISSET(p->socket, f)) { - /* - The only thing that can happen to get us here is apparently an - error on this outgoing(!) UDP socket that isn't immediate (i.e. - something that will not trigger an error directly on send()). - I've once got here when it said `No route to host'. - */ + handle_incoming_vpn_data(p); + + /* Old error stuff (FIXME: copy this to handle_incoming_vpn_data() + getsockopt(p->socket, SOL_SOCKET, SO_ERROR, &x, &l); syslog(LOG_ERR, _("Outgoing data socket error for %s (%s): %s"), p->name, p->hostname, strerror(x)); terminate_connection(p); + */ return; } @@ -1216,9 +1261,6 @@ cp } } - if(FD_ISSET(myself->socket, f)) - handle_incoming_vpn_data(); - if(FD_ISSET(myself->meta_socket, f)) handle_new_meta_connection(); cp @@ -1231,8 +1273,6 @@ cp void handle_tap_input(void) { vpn_packet_t vp; - subnet_t *subnet; - ipv4_t dest; int lenin; cp if(taptype == TAP_TYPE_TUNTAP) @@ -1281,6 +1321,7 @@ void main_loop(void) struct timeval tv; int r; time_t last_ping_check; + int t; cp last_ping_check = time(NULL); @@ -1303,28 +1344,45 @@ cp if(sighup) { + syslog(LOG_INFO, _("Rereading configuration file and restarting in 5 seconds")); sighup = 0; -/* FIXME: reprogram this. - if(debug_lvl > 1) - syslog(LOG_INFO, _("Rereading configuration file")); close_network_connections(); - clear_config(); - if(read_config_file(&config, configfilename)) + clear_config(&config); + + if(read_server_config()) { syslog(LOG_ERR, _("Unable to reread configuration file, exiting")); exit(0); } + sleep(5); - setup_network_connections(); -*/ + + if(setup_network_connections()) + return; + continue; } - if(last_ping_check + timeout < time(NULL)) - /* Let's check if everybody is still alive */ + t = time(NULL); + + /* Let's check if everybody is still alive */ + + if(last_ping_check + timeout < t) { check_dead_connections(); last_ping_check = time(NULL); + + /* Should we regenerate our key? */ + + if(keyexpires < t) + { + if(debug_lvl >= DEBUG_STATUS) + syslog(LOG_INFO, _("Regenerating symmetric key")); + + RAND_bytes(myself->cipher_pktkey, myself->cipher_pktkeylength); + send_key_changed(myself, NULL); + keyexpires = time(NULL) + keylifetime; + } } if(r > 0) @@ -1335,6 +1393,8 @@ cp if(FD_ISSET(tap_fd, &fset)) handle_tap_input(); } + + check_children(); } cp }