X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet.c;h=e62bb8dc122b519097a0d1cac913fff312d31aec;hp=8b243a5cbd031fb4acaf3e4f26951287c708b929;hb=cea3d8f3056d3c6aaaef473443240b8470c8ea2d;hpb=35932fe6c8cb481eb687f98424776ce429570c21 diff --git a/src/net.c b/src/net.c index 8b243a5c..e62bb8dc 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 1.35.4.50 2000/10/29 00:02:18 guus Exp $ + $Id: net.c,v 1.35.4.54 2000/10/29 10:39:06 guus Exp $ */ #include "config.h" @@ -39,6 +39,9 @@ #include #include #include +#include +#include +#include #ifdef HAVE_TUNTAP #include LINUX_IF_TUN_H @@ -48,7 +51,6 @@ #include #include "conf.h" -#include "encr.h" #include "net.h" #include "netutl.h" #include "protocol.h" @@ -68,6 +70,9 @@ int total_socket_out = 0; config_t *upstreamcfg; static int seconds_till_retry; +int keylifetime = 0; +int keyexpires = 0; + char *unknown = NULL; subnet_t mymac; @@ -102,19 +107,20 @@ 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); + + EVP_EncryptInit(&ctx, cl->cipher_pkttype, cl->cipher_pktkey, cl->cipher_pktkey); + 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); @@ -137,18 +143,18 @@ int xrecv(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); + EVP_DecryptInit(&ctx, myself->cipher_pkttype, myself->cipher_pktkey, NULL); + EVP_DecryptUpdate(&ctx, outpkt.data, &outlen, inpkt->data, inpkt->len); + 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); +*/ /* Fix mac address */ @@ -330,7 +336,7 @@ cp 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); @@ -343,7 +349,7 @@ 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); @@ -738,6 +744,14 @@ cp 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); } @@ -754,6 +768,22 @@ cp return -1; } + /* Generate packet encryption key */ + + myself->cipher_pkttype = EVP_bf_cbc(); + + myself->cipher_pktkey = (char *)xmalloc(64); + RAND_bytes(myself->cipher_pktkey, 64); + + if(!(cfg = get_config_val(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); @@ -861,16 +891,8 @@ void close_network_connections(void) 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) - { - shutdown(p->meta_socket, 0); /* No more receptions */ - close(p->meta_socket); - } + p->status.active = 0; + terminate_connection(p); } if(myself) @@ -878,6 +900,8 @@ cp { close(myself->meta_socket); close(myself->socket); + free_conn_list(myself); + myself = NULL; } /* Execute tinc-down script right before shutting down the interface */ @@ -1057,9 +1081,7 @@ void terminate_connection(conn_list_t *cl) subnet_t *s; cp if(cl->status.remove) - { - return; - } + return; cl->status.remove = 1; @@ -1093,19 +1115,19 @@ cp for(s = cl->subnets; s; s = s->next) subnet_del(s); - /* Inactivate */ - - cl->status.active = 0; - /* Check if this was our outgoing connection */ - 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 } @@ -1282,6 +1304,7 @@ void main_loop(void) struct timeval tv; int r; time_t last_ping_check; + int t; cp last_ping_check = time(NULL); @@ -1304,28 +1327,45 @@ 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, 64); + send_key_changed(myself, NULL); + keyexpires = time(NULL) + keylifetime; + } } if(r > 0)