]> git.meshlink.io Git - meshlink/blobdiff - src/net_setup.c
Fix a crash when meshlink_open() is called with an invalid confbase.
[meshlink] / src / net_setup.c
index 4407cd4f7353235b0237e8f1a85806cd44e6e52a..ce9a59ad230b0723e5bafeed12f312fed629b4a5 100644 (file)
@@ -1,7 +1,6 @@
 /*
     net_setup.c -- Setup.
-    Copyright (C) 1998-2005 Ivo Timmermans,
-                  2000-2006 Guus Sliepen <guus@tinc-vpn.org>
+    Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
 
     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 <openssl/pem.h>
-#include <openssl/rsa.h>
-#include <openssl/rand.h>
-#include <openssl/err.h>
-#include <openssl/evp.h>
-
-#include "splay_tree.h"
 #include "conf.h"
 #include "connection.h"
-#include "control.h"
-#include "device.h"
+#include "ecdsa.h"
 #include "graph.h"
 #include "logger.h"
+#include "meshlink_internal.h"
 #include "net.h"
 #include "netutl.h"
-#include "process.h"
 #include "protocol.h"
 #include "route.h"
-#include "subnet.h"
 #include "utils.h"
 #include "xalloc.h"
 
-char *myport;
-static struct event device_ev;
-
-bool read_rsa_public_key(connection_t *c) {
-       FILE *fp;
-       char *fname;
-       char *key;
-
-       cp();
+int autoconnect = 3;
 
-       if(!c->rsa_key) {
-               c->rsa_key = RSA_new();
-//             RSA_blinding_on(c->rsa_key, NULL);
-       }
-
-       /* First, check for simple PublicKey statement */
-
-       if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &key)) {
-               BN_hex2bn(&c->rsa_key->n, key);
-               BN_hex2bn(&c->rsa_key->e, "FFFF");
-               free(key);
+bool node_read_ecdsa_public_key(meshlink_handle_t *mesh, node_t *n) {
+       if(ecdsa_active(n->ecdsa))
                return true;
-       }
-
-       /* Else, check for PublicKeyFile statement and read it */
-
-       if(get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname)) {
-               fp = fopen(fname, "r");
-
-               if(!fp) {
-                       logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
-                                  fname, strerror(errno));
-                       free(fname);
-                       return false;
-               }
-
-               free(fname);
-               c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
-               fclose(fp);
-
-               if(c->rsa_key)
-                       return true;            /* Woohoo. */
-
-               /* If it fails, try PEM_read_RSA_PUBKEY. */
-               fp = fopen(fname, "r");
-
-               if(!fp) {
-                       logger(LOG_ERR, _("Error reading RSA public key file `%s': %s"),
-                                  fname, strerror(errno));
-                       free(fname);
-                       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);
-                       return true;
-               }
-
-               logger(LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
-                          fname, strerror(errno));
-               return false;
-       }
+       splay_tree_t *config_tree;
+       char *p;
 
-       /* Else, check if a harnessed public key is in the config file */
+       init_configuration(&config_tree);
+       if(!read_host_config(mesh, config_tree, n->name))
+               goto exit;
 
-       asprintf(&fname, "%s/hosts/%s", confbase, c->name);
-       fp = fopen(fname, "r");
+       /* First, check for simple ECDSAPublicKey statement */
 
-       if(fp) {
-               c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
-               fclose(fp);
+       if(get_config_string(lookup_config(config_tree, "ECDSAPublicKey"), &p)) {
+               n->ecdsa = ecdsa_set_base64_public_key(p);
+               free(p);
        }
 
-       free(fname);
+exit:
+       exit_configuration(&config_tree);
+       return n->ecdsa;
+}
 
-       if(c->rsa_key)
+bool read_ecdsa_public_key(meshlink_handle_t *mesh, connection_t *c) {
+       if(ecdsa_active(c->ecdsa))
                return true;
 
-       /* Try again with PEM_read_RSA_PUBKEY. */
+       char *p;
 
-       asprintf(&fname, "%s/hosts/%s", confbase, c->name);
-       fp = fopen(fname, "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(!c->config_tree) {
+               init_configuration(&c->config_tree);
+               if(!read_host_config(mesh, c->config_tree, c->name))
+                       return false;
        }
 
-       free(fname);
+       /* First, check for simple ECDSAPublicKey statement */
 
-       if(c->rsa_key)
-               return true;
-
-       logger(LOG_ERR, _("No public key for %s specified!"), c->name);
+       if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) {
+               c->ecdsa = ecdsa_set_base64_public_key(p);
+               free(p);
+               return c->ecdsa;
+       }
 
        return false;
 }
 
-bool read_rsa_private_key(void) {
+bool read_ecdsa_private_key(meshlink_handle_t *mesh) {
        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!"));
-                       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);
-               BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
-               free(key);
-               free(pubkey);
-               return true;
-       }
-
-       if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
-               asprintf(&fname, "%s/rsa_key.priv", confbase);
+       char filename[PATH_MAX];
 
-       fp = fopen(fname, "r");
+       snprintf(filename,PATH_MAX, "%s" SLASH "ecdsa_key.priv", mesh->confbase);
+       fp = fopen(filename, "r");
 
        if(!fp) {
-               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)
-       if(fstat(fileno(fp), &s)) {
-               logger(LOG_ERR, _("Could not stat RSA private key file `%s': %s'"),
-                               fname, strerror(errno));
-               free(fname);
+               logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA private key file: %s", strerror(errno));
                return false;
        }
 
-       if(s.st_mode & ~0100700)
-               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);
+       mesh->self->connection->ecdsa = ecdsa_read_pem_private_key(fp);
        fclose(fp);
 
-       if(!myself->connection->rsa_key) {
-               logger(LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
-                          fname, strerror(errno));
-               free(fname);
-               return false;
-       }
+       if(!mesh->self->connection->ecdsa)
+               logger(DEBUG_ALWAYS, LOG_ERR, "Reading ECDSA private key file failed: %s", strerror(errno));
 
-       free(fname);
-       return true;
+       return mesh->self->connection->ecdsa;
 }
 
-static struct event keyexpire_event;
-
-static void keyexpire_handler(int fd, short events, void *data) {
-       regenerate_key();
-}
-
-void regenerate_key() {
-       RAND_pseudo_bytes((unsigned char *)myself->key, myself->keylength);
+static bool read_invitation_key(meshlink_handle_t *mesh) {
+       FILE *fp;
+       char filename[PATH_MAX];
 
-       if(timeout_initialized(&keyexpire_event)) {
-               ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key"));
-               event_del(&keyexpire_event);
-               send_key_changed(broadcast, myself);
-       } else {
-               timeout_set(&keyexpire_event, keyexpire_handler, NULL);
+       if(mesh->invitation_key) {
+               ecdsa_free(mesh->invitation_key);
+               mesh->invitation_key = NULL;
        }
 
-       event_add(&keyexpire_event, &(struct timeval){keylifetime, 0});
+       snprintf(filename,PATH_MAX, "%s" SLASH "invitations" SLASH "ecdsa_key.priv", mesh->confbase);
 
-       if(myself->cipher) {
-               EVP_CIPHER_CTX_init(&packet_ctx);
-               if(!EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, (unsigned char *)myself->key, (unsigned char *)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));
-                       abort();
-               }
+       fp = fopen(filename, "r");
 
+       if(fp) {
+               mesh->invitation_key = ecdsa_read_pem_private_key(fp);
+               fclose(fp);
+               if(!mesh->invitation_key)
+                       logger(DEBUG_ALWAYS, LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", filename, strerror(errno));
        }
-}
-
-/*
-  Configure node_t myself and set up the local sockets (listen only)
-*/
-bool setup_myself(void) {
-       config_t *cfg;
-       subnet_t *subnet;
-       char *name, *hostname, *mode, *afname, *cipher, *digest;
-       char *address = NULL;
-       char *envp[5];
-       struct addrinfo *ai, *aip, hint = {0};
-       bool choice;
-       int i, err;
 
-       cp();
-
-       myself = new_node();
-       myself->connection = new_connection();
-       init_configuration(&myself->connection->config_tree);
-
-       asprintf(&myself->hostname, _("MYSELF"));
-       asprintf(&myself->connection->hostname, _("MYSELF"));
+       return mesh->invitation_key;
+}
 
-       myself->connection->options = 0;
-       myself->connection->protocol_version = PROT_CURRENT;
+void load_all_nodes(meshlink_handle_t *mesh) {
+       DIR *dir;
+       struct dirent *ent;
+       char dname[PATH_MAX];
 
-       if(!get_config_string(lookup_config(config_tree, "Name"), &name)) {     /* Not acceptable */
-               logger(LOG_ERR, _("Name for tinc daemon required!"));
-               return false;
+       snprintf(dname,PATH_MAX, "%s" SLASH "hosts", mesh->confbase);
+       dir = opendir(dname);
+       if(!dir) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
+               return;
        }
 
-       if(!check_id(name)) {
-               logger(LOG_ERR, _("Invalid name for myself!"));
-               free(name);
-               return false;
-       }
+       while((ent = readdir(dir))) {
+               if(!check_id(ent->d_name))
+                       continue;
 
-       myself->name = name;
-       myself->connection->name = xstrdup(name);
+               node_t *n = lookup_node(mesh, ent->d_name);
+               if(n)
+                       continue;
 
-       if(!read_connection_config(myself->connection)) {
-               logger(LOG_ERR, _("Cannot open host configuration file for myself!"));
-               return false;
+               n = new_node();
+               n->name = xstrdup(ent->d_name);
+               node_add(mesh, n);
        }
 
-       if(!read_rsa_private_key())
-               return false;
+       closedir(dir);
+}
 
-       if(!get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport))
-               asprintf(&myport, "655");
 
-       /* Read in all the subnets specified in the host configuration file */
+char *get_name(meshlink_handle_t *mesh) {
+       char *name = NULL;
 
-       cfg = lookup_config(myself->connection->config_tree, "Subnet");
+       get_config_string(lookup_config(mesh->config, "Name"), &name);
 
-       while(cfg) {
-               if(!get_config_subnet(cfg, &subnet))
-                       return false;
+       if(!name)
+               return NULL;
 
-               subnet_add(myself, subnet);
-
-               cfg = lookup_config_next(myself->connection->config_tree, cfg);
+       if(!check_id(name)) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "Invalid name for mesh->self!");
+               free(name);
+               return NULL;
        }
 
-       /* Check some options */
+       return name;
+}
 
-       if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice)
-               myself->options |= OPTION_INDIRECT;
+bool setup_myself_reloadable(meshlink_handle_t *mesh) {
+       mesh->localdiscovery = true;
+       keylifetime = 3600; // TODO: check if this can be removed as well
+       mesh->maxtimeout = 900;
+       autoconnect = 3;
+       mesh->self->options |= OPTION_PMTU_DISCOVERY;
 
-       if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
-               myself->options |= OPTION_TCPONLY;
+       read_invitation_key(mesh);
 
-       if(get_config_bool(lookup_config(myself->connection->config_tree, "IndirectData"), &choice) && choice)
-               myself->options |= OPTION_INDIRECT;
+       return true;
+}
 
-       if(get_config_bool(lookup_config(myself->connection->config_tree, "TCPOnly"), &choice) && choice)
-               myself->options |= OPTION_TCPONLY;
+/*
+  Add listening sockets.
+*/
+static bool add_listen_address(meshlink_handle_t *mesh, char *address, bool bindto) {
+       char *port = mesh->myport;
+
+       if(address) {
+               char *space = strchr(address, ' ');
+               if(space) {
+                       *space++ = 0;
+                       port = space;
+               }
 
-       if(get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) && choice)
-               myself->options |= OPTION_PMTU_DISCOVERY;
+               if(!strcmp(address, "*"))
+                       *address = 0;
+       }
 
-       if(myself->options & OPTION_TCPONLY)
-               myself->options |= OPTION_INDIRECT;
+       struct addrinfo *ai, hint = {0};
+       hint.ai_family = addressfamily;
+       hint.ai_socktype = SOCK_STREAM;
+       hint.ai_protocol = IPPROTO_TCP;
+       hint.ai_flags = AI_PASSIVE;
 
-       get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
+       int err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
+       free(address);
 
-       if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
-               if(!strcasecmp(mode, "router"))
-                       routing_mode = RMODE_ROUTER;
-               else if(!strcasecmp(mode, "switch"))
-                       routing_mode = RMODE_SWITCH;
-               else if(!strcasecmp(mode, "hub"))
-                       routing_mode = RMODE_HUB;
-               else {
-                       logger(LOG_ERR, _("Invalid routing mode!"));
-                       return false;
-               }
-               free(mode);
-       } else
-               routing_mode = RMODE_ROUTER;
+       if(err || !ai) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "getaddrinfo", err == EAI_SYSTEM ? strerror(err) : gai_strerror(err));
+               return false;
+       }
 
-       get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
+       for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
+               // Ignore duplicate addresses
+               bool found = false;
 
-#if !defined(SOL_IP) || !defined(IP_TOS)
-       if(priorityinheritance)
-               logger(LOG_WARNING, _("PriorityInheritance not supported on this platform"));
-#endif
+               for(int i = 0; i < mesh->listen_sockets; i++)
+                       if(!memcmp(&mesh->listen_socket[i].sa, aip->ai_addr, aip->ai_addrlen)) {
+                               found = true;
+                               break;
+                       }
 
-       if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
-               macexpire = 600;
+               if(found)
+                       continue;
 
-       if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
-               if(maxtimeout <= 0) {
-                       logger(LOG_ERR, _("Bogus maximum timeout!"));
-                       return false;
-               }
-       } else
-               maxtimeout = 900;
-
-       if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
-               if(!strcasecmp(afname, "IPv4"))
-                       addressfamily = AF_INET;
-               else if(!strcasecmp(afname, "IPv6"))
-                       addressfamily = AF_INET6;
-               else if(!strcasecmp(afname, "any"))
-                       addressfamily = AF_UNSPEC;
-               else {
-                       logger(LOG_ERR, _("Invalid address family!"));
+               if(mesh->listen_sockets >= MAXSOCKETS) {
+                       logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
                        return false;
                }
-               free(afname);
-       }
 
-       get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
+               int tcp_fd = setup_listen_socket((sockaddr_t *) aip->ai_addr);
 
-       /* Generate packet encryption key */
+               if(tcp_fd < 0)
+                       continue;
 
-       if(get_config_string
-          (lookup_config(myself->connection->config_tree, "Cipher"), &cipher)) {
-               if(!strcasecmp(cipher, "none")) {
-                       myself->cipher = NULL;
-               } else {
-                       myself->cipher = EVP_get_cipherbyname(cipher);
+               int udp_fd = setup_vpn_in_socket(mesh, (sockaddr_t *) aip->ai_addr);
 
-                       if(!myself->cipher) {
-                               logger(LOG_ERR, _("Unrecognized cipher type!"));
-                               return false;
-                       }
+               if(tcp_fd < 0) {
+                       close(tcp_fd);
+                       continue;
                }
-       } else
-               myself->cipher = EVP_bf_cbc();
 
-       if(myself->cipher)
-               myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
-       else
-               myself->keylength = 1;
+               io_add(&mesh->loop, &mesh->listen_socket[mesh->listen_sockets].tcp, handle_new_meta_connection, &mesh->listen_socket[mesh->listen_sockets], tcp_fd, IO_READ);
+               io_add(&mesh->loop, &mesh->listen_socket[mesh->listen_sockets].udp, handle_incoming_vpn_data, &mesh->listen_socket[mesh->listen_sockets], udp_fd, IO_READ);
 
-       myself->connection->outcipher = EVP_bf_ofb();
-
-       myself->key = xmalloc(myself->keylength);
+               if(mesh->debug_level >= DEBUG_CONNECTIONS) {
+                       char *hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
+                       logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname);
+                       free(hostname);
+               }
 
-       if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
-               keylifetime = 3600;
+               mesh->listen_socket[mesh->listen_sockets].bindto = bindto;
+               memcpy(&mesh->listen_socket[mesh->listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
+               mesh->listen_sockets++;
+       }
 
-       regenerate_key();
-       /* Check if we want to use message authentication codes... */
+       freeaddrinfo(ai);
+       return true;
+}
 
-       if(get_config_string
-          (lookup_config(myself->connection->config_tree, "Digest"), &digest)) {
-               if(!strcasecmp(digest, "none")) {
-                       myself->digest = NULL;
-               } else {
-                       myself->digest = EVP_get_digestbyname(digest);
+/*
+  Configure node_t mesh->self and set up the local sockets (listen only)
+*/
+bool setup_myself(meshlink_handle_t *mesh) {
+       char *name;
+       char *address = NULL;
 
-                       if(!myself->digest) {
-                               logger(LOG_ERR, _("Unrecognized digest type!"));
-                               return false;
-                       }
-               }
-       } else
-               myself->digest = 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!"));
-                               return false;
-                       } else if(myself->maclength < 0) {
-                               logger(LOG_ERR, _("Bogus MAC length!"));
-                               return false;
-                       }
-               }
-       } else
-               myself->maclength = 4;
+       if(!(name = get_name(mesh))) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "Name for MeshLink instance required!");
+               return false;
+       }
 
-       myself->connection->outmaclength = 0;
+       mesh->self = new_node();
+       mesh->self->connection = new_connection();
+       mesh->self->name = name;
+       mesh->self->connection->name = xstrdup(name);
+       read_host_config(mesh, mesh->config, name);
 
-       /* Compression */
+       if(!get_config_string(lookup_config(mesh->config, "Port"), &mesh->myport))
+               mesh->myport = xstrdup("655");
 
-       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!"));
-                       return false;
-               }
-       } else
-               myself->compression = 0;
+       mesh->self->connection->options = 0;
+       mesh->self->connection->protocol_major = PROT_MAJOR;
+       mesh->self->connection->protocol_minor = PROT_MINOR;
 
-       myself->connection->outcompression = 0;
+       mesh->self->options |= PROT_MINOR << 24;
 
-       /* Done */
+       if(!read_ecdsa_private_key(mesh))
+               return false;
 
-       myself->nexthop = myself;
-       myself->via = myself;
-       myself->status.reachable = true;
-       node_add(myself);
+       /* Ensure mesh->myport is numeric */
 
-       graph();
+       if(!atoi(mesh->myport)) {
+               struct addrinfo *ai = str2addrinfo("localhost", mesh->myport, SOCK_DGRAM);
+               sockaddr_t sa;
+               if(!ai || !ai->ai_addr)
+                       return false;
+               free(mesh->myport);
+               memcpy(&sa, ai->ai_addr, ai->ai_addrlen);
+               sockaddr2str(&sa, NULL, &mesh->myport);
+       }
 
-       /* Open device */
+       /* Check some options */
 
-       if(!setup_device())
+       if(!setup_myself_reloadable(mesh))
                return false;
 
-       event_set(&device_ev, device_fd, EV_READ|EV_PERSIST,
-                         handle_device_data, NULL);
-       if (event_add(&device_ev, NULL) < 0) {
-               logger(LOG_ERR, _("event_add failed: %s"), strerror(errno));
-               close_device();
-               return false;
-       }
+       /* Compression */
 
-       /* 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;
+       // TODO: drop compression in the packet layer?
+       mesh->self->incompression = 0;
+       mesh->self->connection->outcompression = 0;
 
-       execute_script("tinc-up", envp);
+       /* Done */
 
-       for(i = 0; i < 5; i++)
-               free(envp[i]);
+       mesh->self->nexthop = mesh->self;
+       mesh->self->via = mesh->self;
+       mesh->self->status.reachable = true;
+       mesh->self->last_state_change = mesh->loop.now.tv_sec;
+       node_add(mesh, mesh->self);
 
-       /* Run subnet-up scripts for our own subnets */
+       graph(mesh);
 
-       subnet_update(myself, NULL, true);
+       if(autoconnect)
+               load_all_nodes(mesh);
 
        /* Open sockets */
 
-       get_config_string(lookup_config(config_tree, "BindToAddress"), &address);
+       mesh->listen_sockets = 0;
 
-       hint.ai_family = addressfamily;
-       hint.ai_socktype = SOCK_STREAM;
-       hint.ai_protocol = IPPROTO_TCP;
-       hint.ai_flags = AI_PASSIVE;
-
-       err = getaddrinfo(address, myport, &hint, &ai);
+       if(!add_listen_address(mesh, address, NULL))
+               return false;
 
-       if(err || !ai) {
-               logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo",
-                          gai_strerror(err));
+       if(!mesh->listen_sockets) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!");
                return false;
        }
 
-       listen_sockets = 0;
-
-       for(aip = ai; aip; aip = aip->ai_next) {
-               listen_socket[listen_sockets].tcp =
-                       setup_listen_socket((sockaddr_t *) aip->ai_addr);
-
-               if(listen_socket[listen_sockets].tcp < 0)
-                       continue;
+       // TODO: require Port to be set? Or use "0" and use getsockname()?
 
-               listen_socket[listen_sockets].udp =
-                       setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
+       if(!mesh->myport)
+               mesh->myport = xstrdup("655");
 
-               if(listen_socket[listen_sockets].udp < 0) {
-                       close(listen_socket[listen_sockets].tcp);
-                       continue;
-               }
+       xasprintf(&mesh->self->hostname, "MYSELF port %s", mesh->myport);
+       mesh->self->connection->hostname = xstrdup(mesh->self->hostname);
 
-               event_set(&listen_socket[listen_sockets].ev_tcp,
-                                 listen_socket[listen_sockets].tcp,
-                                 EV_READ|EV_PERSIST,
-                                 handle_new_meta_connection, NULL);
-               if(event_add(&listen_socket[listen_sockets].ev_tcp, NULL) < 0) {
-                       logger(LOG_EMERG, _("event_add failed: %s"), strerror(errno));
-                       abort();
-               }
+       /* Done. */
 
-               event_set(&listen_socket[listen_sockets].ev_udp,
-                                 listen_socket[listen_sockets].udp,
-                                 EV_READ|EV_PERSIST,
-                                 handle_incoming_vpn_data, NULL);
-               if(event_add(&listen_socket[listen_sockets].ev_udp, NULL) < 0) {
-                       logger(LOG_EMERG, _("event_add failed: %s"), strerror(errno));
-                       abort();
-               }
-
-               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++;
-
-               if(listen_sockets >= MAXSOCKETS) {
-                       logger(LOG_WARNING, _("Maximum of %d listening sockets reached"), MAXSOCKETS);
-                       break;
-               }
-       }
-
-       freeaddrinfo(ai);
-
-       if(listen_sockets)
-               logger(LOG_NOTICE, _("Ready"));
-       else {
-               logger(LOG_ERR, _("Unable to create any listening socket!"));
-               return false;
-       }
+       mesh->last_config_check = mesh->loop.now.tv_sec;
 
        return true;
 }
 
 /*
-  setup all initial network connections
+  initialize network
 */
-bool setup_network_connections(void) {
-       cp();
-
-       init_connections();
-       init_subnets();
-       init_nodes();
-       init_edges();
-       init_requests();
-       init_control();
-
-       if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) {
-               if(pinginterval < 1) {
-                       pinginterval = 86400;
-               }
-       } else
-               pinginterval = 60;
+bool setup_network(meshlink_handle_t *mesh) {
+       init_connections(mesh);
+       init_nodes(mesh);
+       init_edges(mesh);
+       init_requests(mesh);
 
-       if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
-               pingtimeout = 5;
-       if(pingtimeout < 1 || pingtimeout > pinginterval)
-               pingtimeout = pinginterval;
+       mesh->pinginterval = 60;
+       mesh->pingtimeout = 5;
+       maxoutbufsize = 10 * MTU;
 
-       if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
-               maxoutbufsize = 4 * MTU;
-
-       if(!setup_myself())
+       if(!setup_myself(mesh))
                return false;
 
-       try_outgoing_connections();
-
        return true;
 }
 
 /*
   close all open network connections
 */
-void close_network_connections(void) {
-       splay_node_t *node, *next;
-       connection_t *c;
-       char *envp[5];
-       int i;
-
-       cp();
-
-       for(node = connection_tree->head; node; node = next) {
-               next = node->next;
-               c = node->data;
-
-               if(c->outgoing) {
-                       if(c->outgoing->ai)
-                               freeaddrinfo(c->outgoing->ai);
-                       free(c->outgoing->name);
-                       free(c->outgoing);
+void close_network_connections(meshlink_handle_t *mesh) {
+       if(mesh->connections) {
+               for(list_node_t *node = mesh->connections->head, *next; node; node = next) {
+                       next = node->next;
+                       connection_t *c = node->data;
                        c->outgoing = NULL;
+                       terminate_connection(mesh, c, false);
                }
-
-               terminate_connection(c, false);
        }
 
-       if(myself && myself->connection) {
-               subnet_update(myself, NULL, false);
-               terminate_connection(myself->connection, false);
-       }
+       if(mesh->outgoings)
+               list_delete_list(mesh->outgoings);
 
-       for(i = 0; i < listen_sockets; i++) {
-               event_del(&listen_socket[i].ev_tcp);
-               event_del(&listen_socket[i].ev_udp);
-               close(listen_socket[i].tcp);
-               close(listen_socket[i].udp);
+       if(mesh->self && mesh->self->connection) {
+               terminate_connection(mesh, mesh->self->connection, false);
+               free_connection(mesh->self->connection);
        }
 
-       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_control();
-       exit_requests();
-       exit_edges();
-       exit_subnets();
-       exit_nodes();
-       exit_connections();
-
-       execute_script("tinc-down", envp);
+       for(int i = 0; i < mesh->listen_sockets; i++) {
+               io_del(&mesh->loop, &mesh->listen_socket[i].tcp);
+               io_del(&mesh->loop, &mesh->listen_socket[i].udp);
+               close(mesh->listen_socket[i].tcp.fd);
+               close(mesh->listen_socket[i].udp.fd);
+       }
 
-       for(i = 0; i < 4; i++)
-               free(envp[i]);
+       exit_requests(mesh);
+       exit_edges(mesh);
+       exit_nodes(mesh);
+       exit_connections(mesh);
 
-       close_device();
+       if(mesh->myport) free(mesh->myport);
 
        return;
 }