Handle UDP packets from different and ports than advertised.
[tinc] / src / net_setup.c
index cb702cc..7526779 100644 (file)
@@ -1,7 +1,7 @@
 /*
     net_setup.c -- Setup.
-    Copyright (C) 1998-2005 Ivo Timmermans <ivo@tinc-vpn.org>,
-                  2000-2005 Guus Sliepen <guus@tinc-vpn.org>
+    Copyright (C) 1998-2005 Ivo Timmermans,
+                  2000-2009 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
@@ -286,11 +286,6 @@ bool setup_myself(void)
        if(get_config_bool(lookup_config(myself->connection->config_tree, "TCPOnly"), &choice) && choice)
                myself->options |= OPTION_TCPONLY;
 
-       get_config_bool(lookup_config(config_tree, "BlockingTCP"), &blockingtcp);
-
-       if(get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) && choice)
-               myself->options |= OPTION_PMTU_DISCOVERY;
-
        if(myself->options & OPTION_TCPONLY)
                myself->options |= OPTION_INDIRECT;
 
@@ -311,6 +306,10 @@ bool setup_myself(void)
        } else
                routing_mode = RMODE_ROUTER;
 
+       if(routing_mode == RMODE_ROUTER)
+               if(!get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) || choice)
+                       myself->options |= OPTION_PMTU_DISCOVERY;
+
        get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
 
 #if !defined(SOL_IP) || !defined(IP_TOS)
@@ -350,88 +349,72 @@ bool setup_myself(void)
        if(get_config_string
           (lookup_config(myself->connection->config_tree, "Cipher"), &cipher)) {
                if(!strcasecmp(cipher, "none")) {
-                       myself->cipher = NULL;
+                       myself->incipher = NULL;
                } else {
-                       myself->cipher = EVP_get_cipherbyname(cipher);
+                       myself->incipher = EVP_get_cipherbyname(cipher);
 
-                       if(!myself->cipher) {
+                       if(!myself->incipher) {
                                logger(LOG_ERR, _("Unrecognized cipher type!"));
                                return false;
                        }
                }
        } else
-               myself->cipher = EVP_bf_cbc();
+               myself->incipher = EVP_bf_cbc();
 
-       if(myself->cipher)
-               myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
+       if(myself->incipher)
+               myself->inkeylength = myself->incipher->key_len + myself->incipher->iv_len;
        else
-               myself->keylength = 1;
+               myself->inkeylength = 1;
 
        myself->connection->outcipher = EVP_bf_ofb();
 
-       myself->key = xmalloc(myself->keylength);
-       RAND_pseudo_bytes(myself->key, myself->keylength);
-
        if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
                keylifetime = 3600;
 
        keyexpires = now + keylifetime;
        
-       if(myself->cipher) {
-               EVP_CIPHER_CTX_init(&packet_ctx);
-               if(!EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, myself->key, myself->key + myself->cipher->key_len)) {
-                       logger(LOG_ERR, _("Error during initialisation of cipher for %s (%s): %s"),
-                                       myself->name, myself->hostname, ERR_error_string(ERR_get_error(), NULL));
-                       return false;
-               }
-
-       }
-
        /* Check if we want to use message authentication codes... */
 
-       if(get_config_string
-          (lookup_config(myself->connection->config_tree, "Digest"), &digest)) {
+       if(get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest)) {
                if(!strcasecmp(digest, "none")) {
-                       myself->digest = NULL;
+                       myself->indigest = NULL;
                } else {
-                       myself->digest = EVP_get_digestbyname(digest);
+                       myself->indigest = EVP_get_digestbyname(digest);
 
-                       if(!myself->digest) {
+                       if(!myself->indigest) {
                                logger(LOG_ERR, _("Unrecognized digest type!"));
                                return false;
                        }
                }
        } else
-               myself->digest = EVP_sha1();
+               myself->indigest = EVP_sha1();
 
        myself->connection->outdigest = EVP_sha1();
 
-       if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"),
-               &myself->maclength)) {
-               if(myself->digest) {
-                       if(myself->maclength > myself->digest->md_size) {
+       if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &myself->inmaclength)) {
+               if(myself->indigest) {
+                       if(myself->inmaclength > myself->indigest->md_size) {
                                logger(LOG_ERR, _("MAC length exceeds size of digest!"));
                                return false;
-                       } else if(myself->maclength < 0) {
+                       } else if(myself->inmaclength < 0) {
                                logger(LOG_ERR, _("Bogus MAC length!"));
                                return false;
                        }
                }
        } else
-               myself->maclength = 4;
+               myself->inmaclength = 4;
 
        myself->connection->outmaclength = 0;
 
        /* Compression */
 
-       if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"),
-               &myself->compression)) {
-               if(myself->compression < 0 || myself->compression > 11) {
+       if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"), &myself->incompression)) {
+               if(myself->incompression < 0 || myself->incompression > 11) {
                        logger(LOG_ERR, _("Bogus compression level!"));
                        return false;
                }
        } else
-               myself->compression = 0;
+               myself->incompression = 0;
 
        myself->connection->outcompression = 0;
 
@@ -439,7 +422,6 @@ bool setup_myself(void)
 
        myself->nexthop = myself;
        myself->via = myself;
-       myself->status.active = true;
        myself->status.reachable = true;
        node_add(myself);
 
@@ -504,7 +486,7 @@ bool setup_myself(void)
                        free(hostname);
                }
 
-               listen_socket[listen_sockets].sa.sa = *aip->ai_addr;
+               memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
                listen_sockets++;
        }
 
@@ -529,19 +511,27 @@ bool setup_network_connections(void)
 
        now = time(NULL);
 
+       init_events();
        init_connections();
        init_subnets();
        init_nodes();
        init_edges();
-       init_events();
        init_requests();
 
-       if(get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout)) {
-               if(pingtimeout < 1) {
-                       pingtimeout = 86400;
+       if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) {
+               if(pinginterval < 1) {
+                       pinginterval = 86400;
                }
        } else
-               pingtimeout = 60;
+               pinginterval = 60;
+
+       if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
+               pingtimeout = 5;
+       if(pingtimeout < 1 || pingtimeout > pinginterval)
+               pingtimeout = pinginterval;
+
+       if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
+               maxoutbufsize = 10 * MTU;
 
        if(!setup_myself())
                return false;
@@ -566,15 +556,16 @@ void close_network_connections(void)
        for(node = connection_tree->head; node; node = next) {
                next = node->next;
                c = node->data;
-
-               if(c->outgoing)
-                       free(c->outgoing->name), free(c->outgoing), c->outgoing = NULL;
+               c->outgoing = false;
                terminate_connection(c, false);
        }
 
+       list_delete_list(outgoing_list);
+
        if(myself && myself->connection) {
                subnet_update(myself, NULL, false);
                terminate_connection(myself->connection, false);
+               free_connection(myself->connection);
        }
 
        for(i = 0; i < listen_sockets; i++) {
@@ -582,21 +573,25 @@ void close_network_connections(void)
                close(listen_socket[i].udp);
        }
 
-       exit_requests();
-       exit_events();
-       exit_edges();
-       exit_subnets();
-       exit_nodes();
-       exit_connections();
-
        asprintf(&envp[0], "NETNAME=%s", netname ? : "");
        asprintf(&envp[1], "DEVICE=%s", device ? : "");
        asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
        asprintf(&envp[3], "NAME=%s", myself->name);
        envp[4] = NULL;
 
+       exit_requests();
+       exit_edges();
+       exit_subnets();
+       exit_nodes();
+       exit_connections();
+       exit_events();
+
        execute_script("tinc-down", envp);
 
+       if(myport) free(myport);
+
+       EVP_CIPHER_CTX_cleanup(&packet_ctx);
+
        for(i = 0; i < 4; i++)
                free(envp[i]);