Fix combination of Mode = router and DeviceType = tap on Linux.
[tinc] / src / net_setup.c
index 3751537..623ac38 100644 (file)
@@ -1,7 +1,9 @@
 /*
     net_setup.c -- Setup.
-    Copyright (C) 1998-2004 Ivo Timmermans <ivo@tinc-vpn.org>,
-                  2000-2004 Guus Sliepen <guus@tinc-vpn.org>
+    Copyright (C) 1998-2005 Ivo Timmermans,
+                  2000-2013 Guus Sliepen <guus@tinc-vpn.org>
+                  2006      Scott Lamb <slamb@slamb.org>
+                  2010      Brandon Black <blblack@gmail.com>
 
     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
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
-    You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-    $Id$
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
 #include "system.h"
 #include "xalloc.h"
 
 char *myport;
+devops_t devops;
+
+char *proxyhost;
+char *proxyport;
+char *proxyuser;
+char *proxypass;
+proxytype_t proxytype;
 
-bool read_rsa_public_key(connection_t *c)
-{
+bool read_rsa_public_key(connection_t *c) {
        FILE *fp;
-       char *fname;
+       char *pubname;
+       char *hcfname;
        char *key;
 
-       cp();
-
        if(!c->rsa_key) {
                c->rsa_key = RSA_new();
 //             RSA_blinding_on(c->rsa_key, NULL);
@@ -62,7 +67,10 @@ bool read_rsa_public_key(connection_t *c)
        /* First, check for simple PublicKey statement */
 
        if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &key)) {
-               BN_hex2bn(&c->rsa_key->n, key);
+               if(BN_hex2bn(&c->rsa_key->n, key) != strlen(key)) {
+                       logger(LOG_ERR, "Invalid PublicKey for %s!", c->name);
+                       return false;
+               }
                BN_hex2bn(&c->rsa_key->e, "FFFF");
                free(key);
                return true;
@@ -70,100 +78,107 @@ bool read_rsa_public_key(connection_t *c)
 
        /* Else, check for PublicKeyFile statement and read it */
 
-       if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname)) {
-               fp = fopen(fname, "r");
+       if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &pubname)) {
+               fp = fopen(pubname, "r");
 
                if(!fp) {
-                       logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
-                                  fname, strerror(errno));
-                       free(fname);
+                       logger(LOG_ERR, "Error reading RSA public key file `%s': %s", pubname, strerror(errno));
+                       free(pubname);
                        return false;
                }
 
-               free(fname);
                c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
                fclose(fp);
 
-               if(c->rsa_key)
+               if(c->rsa_key) {
+                       free(pubname);
                        return true;            /* Woohoo. */
+               }
 
                /* If it fails, try PEM_read_RSA_PUBKEY. */
-               fp = fopen(fname, "r");
+               fp = fopen(pubname, "r");
 
                if(!fp) {
-                       logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
-                                  fname, strerror(errno));
-                       free(fname);
+                       logger(LOG_ERR, "Error reading RSA public key file `%s': %s", pubname, strerror(errno));
+                       free(pubname);
                        return false;
                }
 
-               free(fname);
                c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
                fclose(fp);
 
                if(c->rsa_key) {
 //                             RSA_blinding_on(c->rsa_key, NULL);
+                       free(pubname);
                        return true;
                }
 
-               logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
-                          fname, strerror(errno));
+               logger(LOG_ERR, "Reading RSA public key file `%s' failed: %s", pubname, strerror(errno));
+               free(pubname);
                return false;
        }
 
        /* Else, check if a harnessed public key is in the config file */
 
-       asprintf(&fname, "%s/hosts/%s", confbase, c->name);
-       fp = fopen(fname, "r");
+       xasprintf(&hcfname, "%s/hosts/%s", confbase, c->name);
+       fp = fopen(hcfname, "r");
 
-       if(fp) {
-               c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
-               fclose(fp);
+       if(!fp) {
+               logger(LOG_ERR, "Error reading RSA public key file `%s': %s", hcfname, strerror(errno));
+               free(hcfname);
+               return false;
        }
 
-       free(fname);
+       c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
+       fclose(fp);
 
-       if(c->rsa_key)
+       if(c->rsa_key) {
+               free(hcfname);
                return true;
+       }
 
        /* Try again with PEM_read_RSA_PUBKEY. */
 
-       asprintf(&fname, "%s/hosts/%s", confbase, c->name);
-       fp = fopen(fname, "r");
+       fp = fopen(hcfname, "r");
 
-       if(fp) {
-               c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
-//             RSA_blinding_on(c->rsa_key, NULL);
-               fclose(fp);
+       if(!fp) {
+               logger(LOG_ERR, "Error reading RSA public key file `%s': %s", hcfname, strerror(errno));
+               free(hcfname);
+               return false;
        }
 
-       free(fname);
+       free(hcfname);
+       c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
+//     RSA_blinding_on(c->rsa_key, NULL);
+       fclose(fp);
 
        if(c->rsa_key)
                return true;
 
-       logger(LOG_ERR, _("No public key for %s specified!"), c->name);
+       logger(LOG_ERR, "No public key for %s specified!", c->name);
 
        return false;
 }
 
-bool read_rsa_private_key(void)
-{
+static bool read_rsa_private_key(void) {
        FILE *fp;
        char *fname, *key, *pubkey;
-       struct stat s;
-
-       cp();
 
        if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
-               if(!get_config_string(lookup_config(myself->connection->config_tree, "PublicKey"), &pubkey)) {
-                       logger(LOG_ERR, _("PrivateKey used but no PublicKey found!"));
+               if(!get_config_string(lookup_config(config_tree, "PublicKey"), &pubkey)) {
+                       logger(LOG_ERR, "PrivateKey used but no PublicKey found!");
                        return false;
                }
                myself->connection->rsa_key = RSA_new();
 //             RSA_blinding_on(myself->connection->rsa_key, NULL);
-               BN_hex2bn(&myself->connection->rsa_key->d, key);
-               BN_hex2bn(&myself->connection->rsa_key->n, pubkey);
+               if(BN_hex2bn(&myself->connection->rsa_key->d, key) != strlen(key)) {
+                       logger(LOG_ERR, "Invalid PrivateKey for myself!");
+                       return false;
+               }
+               if(BN_hex2bn(&myself->connection->rsa_key->n, pubkey) != strlen(pubkey)) {
+                       logger(LOG_ERR, "Invalid PublicKey for myself!");
+                       return false;
+               }
                BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
                free(key);
                free(pubkey);
@@ -171,34 +186,36 @@ bool read_rsa_private_key(void)
        }
 
        if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
-               asprintf(&fname, "%s/rsa_key.priv", confbase);
+               xasprintf(&fname, "%s/rsa_key.priv", confbase);
 
        fp = fopen(fname, "r");
 
        if(!fp) {
-               logger(LOG_ERR, _("Error reading RSA private key file `%s': %s"),
+               logger(LOG_ERR, "Error reading RSA private key file `%s': %s",
                           fname, strerror(errno));
                free(fname);
                return false;
        }
 
 #if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
+       struct stat s;
+
        if(fstat(fileno(fp), &s)) {
-               logger(LOG_ERR, _("Could not stat RSA private key file `%s': %s'"),
+               logger(LOG_ERR, "Could not stat RSA private key file `%s': %s'",
                                fname, strerror(errno));
                free(fname);
                return false;
        }
 
        if(s.st_mode & ~0100700)
-               logger(LOG_WARNING, _("Warning: insecure file permissions for RSA private key file `%s'!"), fname);
+               logger(LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
 #endif
 
        myself->connection->rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
        fclose(fp);
 
        if(!myself->connection->rsa_key) {
-               logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
+               logger(LOG_ERR, "Reading RSA private key file `%s' failed: %s",
                           fname, strerror(errno));
                free(fname);
                return false;
@@ -208,60 +225,223 @@ bool read_rsa_private_key(void)
        return true;
 }
 
+/*
+  Read Subnets from all host config files
+*/
+void load_all_subnets(void) {
+       DIR *dir;
+       struct dirent *ent;
+       char *dname;
+       char *fname;
+       avl_tree_t *config_tree;
+       config_t *cfg;
+       subnet_t *s, *s2;
+       node_t *n;
+
+       xasprintf(&dname, "%s/hosts", confbase);
+       dir = opendir(dname);
+       if(!dir) {
+               logger(LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
+               free(dname);
+               return;
+       }
+
+       while((ent = readdir(dir))) {
+               if(!check_id(ent->d_name))
+                       continue;
+
+               n = lookup_node(ent->d_name);
+               #ifdef _DIRENT_HAVE_D_TYPE
+               //if(ent->d_type != DT_REG)
+               //      continue;
+               #endif
+
+               xasprintf(&fname, "%s/hosts/%s", confbase, ent->d_name);
+               init_configuration(&config_tree);
+               read_config_options(config_tree, ent->d_name);
+               read_config_file(config_tree, fname);
+               free(fname);
+
+               if(!n) {
+                       n = new_node();
+                       n->name = xstrdup(ent->d_name);
+                       node_add(n);
+               }
+
+               for(cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
+                       if(!get_config_subnet(cfg, &s))
+                               continue;
+
+                       if((s2 = lookup_subnet(n, s))) {
+                               s2->expires = -1;
+                       } else {
+                               subnet_add(n, s);
+                       }
+               }
+
+               exit_configuration(&config_tree);
+       }
+
+       closedir(dir);
+}
+
+char *get_name(void) {
+       char *name = NULL;
+
+       get_config_string(lookup_config(config_tree, "Name"), &name);
+
+       if(!name)
+               return NULL;
+
+       if(*name == '$') {
+               char *envname = getenv(name + 1);
+               if(!envname) {
+                       if(strcmp(name + 1, "HOST")) {
+                               fprintf(stderr, "Invalid Name: environment variable %s does not exist\n", name + 1);
+                               return false;
+                       }
+                       char envname[32];
+                       if(gethostname(envname, 32)) {
+                               fprintf(stderr, "Could not get hostname: %s\n", strerror(errno));
+                               return false;
+                       }
+                       envname[31] = 0;
+               }
+               free(name);
+               name = xstrdup(envname);
+               for(char *c = name; *c; c++)
+                       if(!isalnum(*c))
+                               *c = '_';
+       }
+
+       if(!check_id(name)) {
+               logger(LOG_ERR, "Invalid name for myself!");
+               free(name);
+               return false;
+       }
+
+       return name;
+}
+
 /*
   Configure node_t myself and set up the local sockets (listen only)
 */
-bool setup_myself(void)
-{
+static bool setup_myself(void) {
        config_t *cfg;
        subnet_t *subnet;
-       char *name, *hostname, *mode, *afname, *cipher, *digest;
+       char *name, *hostname, *mode, *afname, *cipher, *digest, *type;
+       char *fname = NULL;
        char *address = NULL;
-       char *envp[5];
+       char *proxy = NULL;
+       char *space;
+       char *envp[5] = {NULL};
        struct addrinfo *ai, *aip, hint = {0};
        bool choice;
        int i, err;
-
-       cp();
+       int replaywin_int;
 
        myself = new_node();
        myself->connection = new_connection();
-       init_configuration(&myself->connection->config_tree);
 
-       asprintf(&myself->hostname, _("MYSELF"));
-       asprintf(&myself->connection->hostname, _("MYSELF"));
+       myself->hostname = xstrdup("MYSELF");
+       myself->connection->hostname = xstrdup("MYSELF");
 
        myself->connection->options = 0;
        myself->connection->protocol_version = PROT_CURRENT;
 
-       if(!get_config_string(lookup_config(config_tree, "Name"), &name)) {     /* Not acceptable */
-               logger(LOG_ERR, _("Name for tinc daemon required!"));
-               return false;
-       }
-
-       if(!check_id(name)) {
-               logger(LOG_ERR, _("Invalid name for myself!"));
-               free(name);
+       if(!(name = get_name())) {
+               logger(LOG_ERR, "Name for tinc daemon required!");
                return false;
        }
 
        myself->name = name;
        myself->connection->name = xstrdup(name);
+       xasprintf(&fname, "%s/hosts/%s", confbase, name);
+       read_config_options(config_tree, name);
+       read_config_file(config_tree, fname);
+       free(fname);
 
-       if(!read_connection_config(myself->connection)) {
-               logger(LOG_ERR, _("Cannot open host configuration file for myself!"));
+       if(!read_rsa_private_key())
                return false;
+
+       if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
+               myport = xstrdup("655");
+
+       if(!atoi(myport)) {
+               struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM);
+               sockaddr_t sa;
+               if(!ai || !ai->ai_addr)
+                       return false;
+               free(myport);
+               memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
+               sockaddr2str(&sa, NULL, &myport);
        }
 
-       if(!read_rsa_private_key())
-               return false;
+       get_config_string(lookup_config(config_tree, "Proxy"), &proxy);
+       if(proxy) {
+               if((space = strchr(proxy, ' ')))
+                       *space++ = 0;
+
+               if(!strcasecmp(proxy, "none")) {
+                       proxytype = PROXY_NONE;
+               } else if(!strcasecmp(proxy, "socks4")) {
+                       proxytype = PROXY_SOCKS4;
+               } else if(!strcasecmp(proxy, "socks4a")) {
+                       proxytype = PROXY_SOCKS4A;
+               } else if(!strcasecmp(proxy, "socks5")) {
+                       proxytype = PROXY_SOCKS5;
+               } else if(!strcasecmp(proxy, "http")) {
+                       proxytype = PROXY_HTTP;
+               } else if(!strcasecmp(proxy, "exec")) {
+                       proxytype = PROXY_EXEC;
+               } else {
+                       logger(LOG_ERR, "Unknown proxy type %s!", proxy);
+                       return false;
+               }
 
-       if(!get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport))
-               asprintf(&myport, "655");
+               switch(proxytype) {
+                       case PROXY_NONE:
+                       default:
+                               break;
+
+                       case PROXY_EXEC:
+                               if(!space || !*space) {
+                                       logger(LOG_ERR, "Argument expected for proxy type exec!");
+                                       return false;
+                               }
+                               proxyhost =  xstrdup(space);
+                               break;
+
+                       case PROXY_SOCKS4:
+                       case PROXY_SOCKS4A:
+                       case PROXY_SOCKS5:
+                       case PROXY_HTTP:
+                               proxyhost = space;
+                               if(space && (space = strchr(space, ' ')))
+                                       *space++ = 0, proxyport = space;
+                               if(space && (space = strchr(space, ' ')))
+                                       *space++ = 0, proxyuser = space;
+                               if(space && (space = strchr(space, ' ')))
+                                       *space++ = 0, proxypass = space;
+                               if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) {
+                                       logger(LOG_ERR, "Host and port argument expected for proxy!");
+                                       return false;
+                               }
+                               proxyhost = xstrdup(proxyhost);
+                               proxyport = xstrdup(proxyport);
+                               if(proxyuser && *proxyuser)
+                                       proxyuser = xstrdup(proxyuser);
+                               if(proxypass && *proxypass)
+                                       proxypass = xstrdup(proxypass);
+                               break;
+               }
+
+               free(proxy);
+       }
 
        /* Read in all the subnets specified in the host configuration file */
 
-       cfg = lookup_config(myself->connection->config_tree, "Subnet");
+       cfg = lookup_config(config_tree, "Subnet");
 
        while(cfg) {
                if(!get_config_subnet(cfg, &subnet))
@@ -269,7 +449,7 @@ bool setup_myself(void)
 
                subnet_add(myself, subnet);
 
-               cfg = lookup_config_next(myself->connection->config_tree, cfg);
+               cfg = lookup_config_next(config_tree, cfg);
        }
 
        /* Check some options */
@@ -280,21 +460,14 @@ bool setup_myself(void)
        if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
                myself->options |= OPTION_TCPONLY;
 
-       if(get_config_bool(lookup_config(myself->connection->config_tree, "IndirectData"), &choice) && choice)
-               myself->options |= OPTION_INDIRECT;
-
-       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;
 
+       get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
+       get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
        get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
+       get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
+       strictsubnets |= tunnelserver;
 
        if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
                if(!strcasecmp(mode, "router"))
@@ -304,18 +477,55 @@ bool setup_myself(void)
                else if(!strcasecmp(mode, "hub"))
                        routing_mode = RMODE_HUB;
                else {
-                       logger(LOG_ERR, _("Invalid routing mode!"));
+                       logger(LOG_ERR, "Invalid routing mode!");
                        return false;
                }
                free(mode);
-       } else
-               routing_mode = RMODE_ROUTER;
+       }
+
+       if(get_config_string(lookup_config(config_tree, "Forwarding"), &mode)) {
+               if(!strcasecmp(mode, "off"))
+                       forwarding_mode = FMODE_OFF;
+               else if(!strcasecmp(mode, "internal"))
+                       forwarding_mode = FMODE_INTERNAL;
+               else if(!strcasecmp(mode, "kernel"))
+                       forwarding_mode = FMODE_KERNEL;
+               else {
+                       logger(LOG_ERR, "Invalid forwarding mode!");
+                       return false;
+               }
+               free(mode);
+       }
+
+       choice = true;
+       get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice);
+       if(choice)
+               myself->options |= OPTION_PMTU_DISCOVERY;
+
+       choice = true;
+       get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice);
+       if(choice)
+               myself->options |= OPTION_CLAMP_MSS;
 
        get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
+       get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl);
+       if(get_config_string(lookup_config(config_tree, "Broadcast"), &mode)) {
+               if(!strcasecmp(mode, "no"))
+                       broadcast_mode = BMODE_NONE;
+               else if(!strcasecmp(mode, "yes") || !strcasecmp(mode, "mst"))
+                       broadcast_mode = BMODE_MST;
+               else if(!strcasecmp(mode, "direct"))
+                       broadcast_mode = BMODE_DIRECT;
+               else {
+                       logger(LOG_ERR, "Invalid broadcast mode!");
+                       return false;
+               }
+               free(mode);
+       }
 
 #if !defined(SOL_IP) || !defined(IP_TOS)
        if(priorityinheritance)
-               logger(LOG_WARNING, _("PriorityInheritance not supported on this platform"));
+               logger(LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");
 #endif
 
        if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
@@ -323,12 +533,34 @@ bool setup_myself(void)
 
        if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
                if(maxtimeout <= 0) {
-                       logger(LOG_ERR, _("Bogus maximum timeout!"));
+                       logger(LOG_ERR, "Bogus maximum timeout!");
                        return false;
                }
        } else
                maxtimeout = 900;
 
+       if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
+               if(udp_rcvbuf <= 0) {
+                       logger(LOG_ERR, "UDPRcvBuf cannot be negative!");
+                       return false;
+               }
+       }
+
+       if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
+               if(udp_sndbuf <= 0) {
+                       logger(LOG_ERR, "UDPSndBuf cannot be negative!");
+                       return false;
+               }
+       }
+
+       if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
+               if(replaywin_int < 0) {
+                       logger(LOG_ERR, "ReplayWindow cannot be negative!");
+                       return false;
+               }
+               replaywin = (unsigned)replaywin_int;
+       }
+
        if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
                if(!strcasecmp(afname, "IPv4"))
                        addressfamily = AF_INET;
@@ -337,7 +569,7 @@ bool setup_myself(void)
                else if(!strcasecmp(afname, "any"))
                        addressfamily = AF_UNSPEC;
                else {
-                       logger(LOG_ERR, _("Invalid address family!"));
+                       logger(LOG_ERR, "Invalid address family!");
                        return false;
                }
                free(afname);
@@ -348,90 +580,74 @@ bool setup_myself(void)
        /* Generate packet encryption key */
 
        if(get_config_string
-          (lookup_config(myself->connection->config_tree, "Cipher"), &cipher)) {
+          (lookup_config(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) {
-                               logger(LOG_ERR, _("Unrecognized cipher type!"));
+                       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(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) {
-                               logger(LOG_ERR, _("Unrecognized digest type!"));
+                       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) {
-                               logger(LOG_ERR, _("MAC length exceeds size of digest!"));
+       if(get_config_int(lookup_config(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) {
-                               logger(LOG_ERR, _("Bogus MAC length!"));
+                       } 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) {
-                       logger(LOG_ERR, _("Bogus compression level!"));
+       if(get_config_int(lookup_config(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;
 
@@ -439,27 +655,47 @@ bool setup_myself(void)
 
        myself->nexthop = myself;
        myself->via = myself;
-       myself->status.active = true;
        myself->status.reachable = true;
        node_add(myself);
 
        graph();
 
+       if(strictsubnets)
+               load_all_subnets();
+
        /* Open device */
 
-       if(!setup_device())
+       devops = os_devops;
+
+       if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
+               if(!strcasecmp(type, "dummy"))
+                       devops = dummy_devops;
+               else if(!strcasecmp(type, "raw_socket"))
+                       devops = raw_socket_devops;
+               else if(!strcasecmp(type, "multicast"))
+                       devops = multicast_devops;
+#ifdef ENABLE_UML
+               else if(!strcasecmp(type, "uml"))
+                       devops = uml_devops;
+#endif
+#ifdef ENABLE_VDE
+               else if(!strcasecmp(type, "vde"))
+                       devops = vde_devops;
+#endif
+       }
+
+       if(!devops.setup())
                return false;
 
        /* Run tinc-up script to further initialize the tap interface */
-       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;
+       xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+       xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+       xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+       xasprintf(&envp[3], "NAME=%s", myself->name);
 
        execute_script("tinc-up", envp);
 
-       for(i = 0; i < 5; i++)
+       for(i = 0; i < 4; i++)
                free(envp[i]);
 
        /* Run subnet-up scripts for our own subnets */
@@ -468,52 +704,117 @@ bool setup_myself(void)
 
        /* Open sockets */
 
-       get_config_string(lookup_config(config_tree, "BindToAddress"), &address);
-
-       hint.ai_family = addressfamily;
-       hint.ai_socktype = SOCK_STREAM;
-       hint.ai_protocol = IPPROTO_TCP;
-       hint.ai_flags = AI_PASSIVE;
+       if(!do_detach && getenv("LISTEN_FDS")) {
+               sockaddr_t sa;
+               socklen_t salen;
 
-       err = getaddrinfo(address, myport, &hint, &ai);
+               listen_sockets = atoi(getenv("LISTEN_FDS"));
+#ifdef HAVE_UNSETENV
+               unsetenv("LISTEN_FDS");
+#endif
 
-       if(err || !ai) {
-               logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo",
-                          gai_strerror(err));
-               return false;
-       }
+               if(listen_sockets > MAXSOCKETS) {
+                       logger(LOG_ERR, "Too many listening sockets");
+                       return false;
+               }
 
-       listen_sockets = 0;
+               for(i = 0; i < listen_sockets; i++) {
+                       salen = sizeof sa;
+                       if(getsockname(i + 3, &sa.sa, &salen) < 0) {
+                               logger(LOG_ERR, "Could not get address of listen fd %d: %s", i + 3, sockstrerror(errno));
+                               return false;
+                       }
 
-       for(aip = ai; aip; aip = aip->ai_next) {
-               listen_socket[listen_sockets].tcp =
-                       setup_listen_socket((sockaddr_t *) aip->ai_addr);
+                       listen_socket[i].tcp = i + 3;
 
-               if(listen_socket[listen_sockets].tcp < 0)
-                       continue;
+#ifdef FD_CLOEXEC
+                       fcntl(i + 3, F_SETFD, FD_CLOEXEC);
+#endif
 
-               listen_socket[listen_sockets].udp =
-                       setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
+                       listen_socket[i].udp = setup_vpn_in_socket(&sa);
+                       if(listen_socket[i].udp < 0)
+                               return false;
 
-               if(listen_socket[listen_sockets].udp < 0)
-                       continue;
+                       ifdebug(CONNECTIONS) {
+                               hostname = sockaddr2hostname(&sa);
+                               logger(LOG_NOTICE, "Listening on %s", hostname);
+                               free(hostname);
+                       }
 
-               ifdebug(CONNECTIONS) {
-                       hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
-                       logger(LOG_NOTICE, _("Listening on %s"), hostname);
-                       free(hostname);
+                       memcpy(&listen_socket[i].sa, &sa, salen);
                }
+       } else {
+               listen_sockets = 0;
+               cfg = lookup_config(config_tree, "BindToAddress");
+
+               do {
+                       get_config_string(cfg, &address);
+                       if(cfg)
+                               cfg = lookup_config_next(config_tree, cfg);
+
+                       char *port = myport;
+
+                       if(address) {
+                               char *space = strchr(address, ' ');
+                               if(space) {
+                                       *space++ = 0;
+                                       port = space;
+                               }
+
+                               if(!strcmp(address, "*"))
+                                       *address = 0;
+                       }
 
-               listen_socket[listen_sockets].sa.sa = *aip->ai_addr;
-               listen_sockets++;
-       }
+                       hint.ai_family = addressfamily;
+                       hint.ai_socktype = SOCK_STREAM;
+                       hint.ai_protocol = IPPROTO_TCP;
+                       hint.ai_flags = AI_PASSIVE;
+
+                       err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
+                       free(address);
+
+                       if(err || !ai) {
+                               logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
+                                          gai_strerror(err));
+                               return false;
+                       }
+
+                       for(aip = ai; aip; aip = aip->ai_next) {
+                               if(listen_sockets >= MAXSOCKETS) {
+                                       logger(LOG_ERR, "Too many listening sockets");
+                                       return false;
+                               }
+
+                               listen_socket[listen_sockets].tcp =
+                                       setup_listen_socket((sockaddr_t *) aip->ai_addr);
+
+                               if(listen_socket[listen_sockets].tcp < 0)
+                                       continue;
 
-       freeaddrinfo(ai);
+                               listen_socket[listen_sockets].udp =
+                                       setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
+
+                               if(listen_socket[listen_sockets].udp < 0)
+                                       continue;
+
+                               ifdebug(CONNECTIONS) {
+                                       hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
+                                       logger(LOG_NOTICE, "Listening on %s", hostname);
+                                       free(hostname);
+                               }
+
+                               memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
+                               listen_sockets++;
+                       }
+
+                       freeaddrinfo(ai);
+               } while(cfg);
+       }
 
        if(listen_sockets)
-               logger(LOG_NOTICE, _("Ready"));
+               logger(LOG_NOTICE, "Ready");
        else {
-               logger(LOG_ERR, _("Unable to create any listening socket!"));
+               logger(LOG_ERR, "Unable to create any listening socket!");
                return false;
        }
 
@@ -521,60 +822,68 @@ bool setup_myself(void)
 }
 
 /*
-  setup all initial network connections
+  initialize network
 */
-bool setup_network_connections(void)
-{
-       cp();
-
+bool setup_network(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;
 
-       try_outgoing_connections();
-
        return true;
 }
 
 /*
   close all open network connections
 */
-void close_network_connections(void)
-{
+void close_network_connections(void) {
        avl_node_t *node, *next;
        connection_t *c;
-       char *envp[5];
+       char *envp[5] = {NULL};
        int i;
 
-       cp();
-
        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 = NULL;
                terminate_connection(c, false);
        }
 
+       for(list_node_t *node = outgoing_list->head; node; node = node->next) {
+               outgoing_t *outgoing = node->data;
+
+               if(outgoing->event)
+                       event_del(outgoing->event);
+       }
+
+       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++) {
@@ -582,25 +891,26 @@ void close_network_connections(void)
                close(listen_socket[i].udp);
        }
 
+       xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+       xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+       xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+       xasprintf(&envp[3], "NAME=%s", myself->name);
+
        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_events();
 
        execute_script("tinc-down", envp);
 
+       if(myport) free(myport);
+
        for(i = 0; i < 4; i++)
                free(envp[i]);
 
-       close_device();
+       devops.close();
 
        return;
 }