X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fnet_setup.c;h=1b091db04034bd1a343390f508752d89de571b6a;hb=e306efba0aa513ae498b84b7f383b05365022092;hp=5462c04b6771acd4b10dc34e8ff69561c2764828;hpb=0b9175e998c2180e5d73ef3d644a49d620c68cad;p=meshlink

diff --git a/src/net_setup.c b/src/net_setup.c
index 5462c04b..1b091db0 100644
--- a/src/net_setup.c
+++ b/src/net_setup.c
@@ -1,7 +1,6 @@
 /*
     net_setup.c -- Setup.
-    Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>,
-                  2000-2002 Guus Sliepen <guus@sliepen.eu.org>
+    Copyright (C) 2014-2017 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
@@ -13,613 +12,495 @@
     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: net_setup.c,v 1.1.2.33 2003/07/06 22:11:32 guus Exp $
+    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 "config.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <netdb.h>
-#include <netinet/in.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <signal.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <sys/ioctl.h>
-/* SunOS really wants sys/socket.h BEFORE net/if.h,
-   and FreeBSD wants these lines below the rest. */
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <net/if.h>
-#ifdef HAVE_NETINET_IN_SYSTM_H
-#include <netinet/in_systm.h>
-#endif
-#ifdef HAVE_NETINET_IP_H
-#include <netinet/ip.h>
-#endif
-#ifdef HAVE_NETINET_TCP_H
-#include <netinet/tcp.h>
-#endif
-
-#include <openssl/pem.h>
-#include <openssl/rsa.h>
-#include <openssl/rand.h>
-
-#include <utils.h>
-#include <xalloc.h>
-#include <avl_tree.h>
-#include <list.h>
+#include "system.h"
 
 #include "conf.h"
 #include "connection.h"
-#include "meta.h"
+#include "ecdsa.h"
+#include "graph.h"
+#include "logger.h"
+#include "meshlink_internal.h"
 #include "net.h"
 #include "netutl.h"
-#include "process.h"
+#include "packmsg.h"
 #include "protocol.h"
-#include "subnet.h"
-#include "graph.h"
-#include "process.h"
 #include "route.h"
-#include "device.h"
-#include "event.h"
-#include "logger.h"
+#include "utils.h"
+#include "xalloc.h"
+#include "submesh.h"
+
+/// Helper function to start parsing a host config file
+static bool node_get_config(meshlink_handle_t *mesh, node_t *n, config_t *config, packmsg_input_t *in) {
+	if(!config_read(mesh, "current", n->name, config, mesh->config_key)) {
+		return false;
+	}
 
-#include "system.h"
+	in->ptr = config->buf;
+	in->len = config->len;
 
-char *myport;
+	uint32_t version = packmsg_get_uint32(in);
 
-int read_rsa_public_key(connection_t *c)
-{
-	FILE *fp;
-	char *fname;
-	char *key;
+	if(version != MESHLINK_CONFIG_VERSION) {
+		logger(mesh, MESHLINK_ERROR, "Invalid config file for node %s", n->name);
+		config_free(config);
+		return false;
+	}
 
-	cp();
+	const char *name;
+	uint32_t len = packmsg_get_str_raw(in, &name);
 
-	if(!c->rsa_key) {
-		c->rsa_key = RSA_new();
-//		RSA_blinding_on(c->rsa_key, NULL);
+	if(len != strlen(n->name) || !name || strncmp(name, n->name, len)) {
+		logger(mesh, MESHLINK_ERROR, "Invalid config file for node %s", n->name);
+		config_free(config);
+		return false;
 	}
 
-	/* First, check for simple PublicKey statement */
+	return true;
+}
 
-	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);
-		return 0;
+/// Read the public key from a host config file. Used whenever we need to start an SPTPS session.
+bool node_read_public_key(meshlink_handle_t *mesh, node_t *n) {
+	if(ecdsa_active(n->ecdsa)) {
+		return true;
 	}
 
-	/* Else, check for PublicKeyFile statement and read it */
+	config_t config;
+	packmsg_input_t in;
 
-	if(get_config_string
-	   (lookup_config(c->config_tree, "PublicKeyFile"), &fname)) {
-		if(is_safe_path(fname)) {
-			fp = fopen(fname, "r");
-
-			if(!fp) {
-				logger(DEBUG_ALWAYS, LOG_ERR, _("Error reading RSA public key file `%s': %s"),
-					   fname, strerror(errno));
-				free(fname);
-				return -1;
-			}
+	if(!node_get_config(mesh, n, &config, &in)) {
+		return false;
+	}
 
-			free(fname);
-			c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
-			fclose(fp);
+	packmsg_skip_element(&in); /* submesh */
+	packmsg_get_int32(&in); /* devclass */
+	packmsg_get_bool(&in); /* blacklisted */
 
-			if(c->rsa_key)
-				return 0;		/* Woohoo. */
+	const void *key;
+	uint32_t len = packmsg_get_bin_raw(&in, &key);
 
-			/* If it fails, try PEM_read_RSA_PUBKEY. */
-			fp = fopen(fname, "r");
+	if(len != 32) {
+		config_free(&config);
+		return false;
+	}
 
-			if(!fp) {
-				logger(DEBUG_ALWAYS, LOG_ERR, _("Error reading RSA public key file `%s': %s"),
-					   fname, strerror(errno));
-				free(fname);
-				return -1;
-			}
+	n->ecdsa = ecdsa_set_public_key(key);
 
-			free(fname);
-			c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
-			fclose(fp);
+	// While we are at it, read known address information
+	if(!n->canonical_address) {
+		n->canonical_address = packmsg_get_str_dup(&in);
+	} else {
+		packmsg_skip_element(&in);
+	}
 
-			if(c->rsa_key) {
-//				RSA_blinding_on(c->rsa_key, NULL);
-				return 0;
-			}
+	// Append any known addresses in the config file to the list we currently have
+	uint32_t known_count = 0;
 
-			logger(DEBUG_ALWAYS, LOG_ERR, _("Reading RSA public key file `%s' failed: %s"),
-				   fname, strerror(errno));
-			return -1;
-		} else {
-			free(fname);
-			return -1;
+	for(uint32_t i = 0; i < MAX_RECENT; i++) {
+		if(n->recent[i].sa.sa_family) {
+			known_count++;
 		}
 	}
 
-	/* Else, check if a harnessed public key is in the config file */
-
-	asprintf(&fname, "%s/hosts/%s", confbase, c->name);
-	fp = fopen(fname, "r");
+	uint32_t count = packmsg_get_array(&in);
 
-	if(fp) {
-		c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
-		fclose(fp);
+	for(uint32_t i = 0; i < count; i++) {
+		if(i < MAX_RECENT - known_count) {
+			n->recent[i + known_count] = packmsg_get_sockaddr(&in);
+		} else {
+			packmsg_skip_element(&in);
+		}
 	}
 
-	free(fname);
+	time_t last_reachable = packmsg_get_int64(&in);
+	time_t last_unreachable = packmsg_get_int64(&in);
 
-	if(c->rsa_key)
-		return 0;
+	if(!n->last_reachable) {
+		n->last_reachable = last_reachable;
+	}
 
-	/* Try again with PEM_read_RSA_PUBKEY. */
+	if(!n->last_unreachable) {
+		n->last_unreachable = last_unreachable;
+	}
 
-	asprintf(&fname, "%s/hosts/%s", confbase, c->name);
-	fp = fopen(fname, "r");
+	config_free(&config);
+	return true;
+}
 
-	if(fp) {
-		c->rsa_key = PEM_read_RSA_PUBKEY(fp, &c->rsa_key, NULL, NULL);
-//		RSA_blinding_on(c->rsa_key, NULL);
-		fclose(fp);
+/// Fill in node details from a config blob.
+bool node_read_from_config(meshlink_handle_t *mesh, node_t *n, const config_t *config) {
+	if(n->canonical_address) {
+		return true;
 	}
 
-	free(fname);
+	packmsg_input_t in = {config->buf, config->len};
+	uint32_t version = packmsg_get_uint32(&in);
 
-	if(c->rsa_key)
-		return 0;
+	if(version != MESHLINK_CONFIG_VERSION) {
+		return false;
+	}
 
-	logger(DEBUG_ALWAYS, LOG_ERR, _("No public key for %s specified!"), c->name);
+	char *name = packmsg_get_str_dup(&in);
 
-	return -1;
-}
-
-int read_rsa_private_key(void)
-{
-	FILE *fp;
-	char *fname, *key;
+	if(!name) {
+		return false;
+	}
 
-	cp();
+	if(n->name) {
+		if(strcmp(n->name, name)) {
+			free(name);
+			return false;
+		}
 
-	if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
-		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->e, "FFFF");
-		free(key);
-		return 0;
+		free(name);
+	} else {
+		n->name = name;
 	}
 
-	if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
-		asprintf(&fname, "%s/rsa_key.priv", confbase);
+	char *submesh_name = packmsg_get_str_dup(&in);
 
-	if(is_safe_path(fname)) {
-		fp = fopen(fname, "r");
+	if(!strcmp(submesh_name, CORE_MESH)) {
+		free(submesh_name);
+		n->submesh = NULL;
+	} else {
+		n->submesh = lookup_or_create_submesh(mesh, submesh_name);
+		free(submesh_name);
 
-		if(!fp) {
-			logger(DEBUG_ALWAYS, LOG_ERR, _("Error reading RSA private key file `%s': %s"),
-				   fname, strerror(errno));
-			free(fname);
-			return -1;
+		if(!n->submesh) {
+			return false;
 		}
+	}
 
-		free(fname);
-		myself->connection->rsa_key =
-			PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
-		fclose(fp);
+	n->devclass = packmsg_get_int32(&in);
+	n->status.blacklisted = packmsg_get_bool(&in);
+	const void *key;
+	uint32_t len = packmsg_get_bin_raw(&in, &key);
 
-		if(!myself->connection->rsa_key) {
-			logger(DEBUG_ALWAYS, LOG_ERR, _("Reading RSA private key file `%s' failed: %s"),
-				   fname, strerror(errno));
-			return -1;
+	if(len) {
+		if(len != 32) {
+			return false;
 		}
 
-		return 0;
+		if(!ecdsa_active(n->ecdsa)) {
+			n->ecdsa = ecdsa_set_public_key(key);
+		}
 	}
 
-	free(fname);
-	return -1;
-}
-
-/*
-  Configure node_t myself and set up the local sockets (listen only)
-*/
-int setup_myself(void)
-{
-	config_t *cfg;
-	subnet_t *subnet;
-	char *name, *hostname, *mode, *afname, *cipher, *digest;
-	char *address = NULL;
-	struct addrinfo hint, *ai, *aip;
-	int choice, err;
-
-	cp();
-
-	myself = new_node();
-	myself->connection = new_connection();
-	init_configuration(&myself->connection->config_tree);
+	n->canonical_address = packmsg_get_str_dup(&in);
+	uint32_t count = packmsg_get_array(&in);
 
-	asprintf(&myself->hostname, _("MYSELF"));
-	asprintf(&myself->connection->hostname, _("MYSELF"));
+	for(uint32_t i = 0; i < count; i++) {
+		if(i < MAX_RECENT) {
+			n->recent[i] = packmsg_get_sockaddr(&in);
+		} else {
+			packmsg_skip_element(&in);
+		}
+	}
 
-	myself->connection->options = 0;
-	myself->connection->protocol_version = PROT_CURRENT;
+	n->last_reachable = packmsg_get_int64(&in);
+	n->last_unreachable = packmsg_get_int64(&in);
 
-	if(!get_config_string(lookup_config(config_tree, "Name"), &name)) {	/* Not acceptable */
-		logger(DEBUG_ALWAYS, LOG_ERR, _("Name for tinc daemon required!"));
-		return -1;
-	}
+	return packmsg_done(&in);
+}
 
-	if(check_id(name)) {
-		logger(DEBUG_ALWAYS, LOG_ERR, _("Invalid name for myself!"));
-		free(name);
-		return -1;
+bool node_write_config(meshlink_handle_t *mesh, node_t *n) {
+	if(!mesh->confbase) {
+		return true;
 	}
 
-	myself->name = name;
-	myself->connection->name = xstrdup(name);
+	uint8_t buf[4096];
+	packmsg_output_t out = {buf, sizeof(buf)};
 
-	if(read_rsa_private_key())
-		return -1;
+	packmsg_add_uint32(&out, MESHLINK_CONFIG_VERSION);
+	packmsg_add_str(&out, n->name);
+	packmsg_add_str(&out, n->submesh ? n->submesh->name : CORE_MESH);
+	packmsg_add_int32(&out, n->devclass);
+	packmsg_add_bool(&out, n->status.blacklisted);
 
-	if(read_connection_config(myself->connection)) {
-		logger(DEBUG_ALWAYS, LOG_ERR, _("Cannot open host configuration file for myself!"));
-		return -1;
+	if(ecdsa_active(n->ecdsa)) {
+		packmsg_add_bin(&out, ecdsa_get_public_key(n->ecdsa), 32);
+	} else {
+		packmsg_add_bin(&out, "", 0);
 	}
 
-	if(read_rsa_public_key(myself->connection))
-		return -1;
-
-	if(!get_config_string
-	   (lookup_config(myself->connection->config_tree, "Port"), &myport))
-		asprintf(&myport, "655");
+	packmsg_add_str(&out, n->canonical_address ? n->canonical_address : "");
 
-	/* Read in all the subnets specified in the host configuration file */
+	uint32_t count = 0;
 
-	cfg = lookup_config(myself->connection->config_tree, "Subnet");
-
-	while(cfg) {
-		if(!get_config_subnet(cfg, &subnet))
-			return -1;
+	for(uint32_t i = 0; i < MAX_RECENT; i++) {
+		if(n->recent[i].sa.sa_family) {
+			count++;
+		} else {
+			break;
+		}
+	}
 
-		subnet_add(myself, subnet);
+	packmsg_add_array(&out, count);
 
-		cfg = lookup_config_next(myself->connection->config_tree, cfg);
+	for(uint32_t i = 0; i < count; i++) {
+		packmsg_add_sockaddr(&out, &n->recent[i]);
 	}
 
-	/* Check some options */
+	packmsg_add_int64(&out, n->last_reachable);
+	packmsg_add_int64(&out, n->last_unreachable);
 
-	if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice))
-		if(choice)
-			myself->options |= OPTION_INDIRECT;
+	if(!packmsg_output_ok(&out)) {
+		meshlink_errno = MESHLINK_EINTERNAL;
+		return false;
+	}
 
-	if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice))
-		if(choice)
-			myself->options |= OPTION_TCPONLY;
+	config_t config = {buf, packmsg_output_size(&out, buf)};
 
-	if(get_config_bool
-	   (lookup_config(myself->connection->config_tree, "IndirectData"),
-		&choice))
-		if(choice)
-			myself->options |= OPTION_INDIRECT;
+	if(!config_write(mesh, "current", n->name, &config, mesh->config_key)) {
+		call_error_cb(mesh, MESHLINK_ESTORAGE);
+		return false;
+	}
 
-	if(get_config_bool
-	   (lookup_config(myself->connection->config_tree, "TCPOnly"), &choice))
-		if(choice)
-			myself->options |= OPTION_TCPONLY;
+	return true;
+}
 
-	if(myself->options & OPTION_TCPONLY)
-		myself->options |= OPTION_INDIRECT;
+static bool load_node(meshlink_handle_t *mesh, const char *name, void *priv) {
+	(void)priv;
 
-	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(DEBUG_ALWAYS, LOG_ERR, _("Invalid routing mode!"));
-			return -1;
-		}
-		free(mode);
-	} else
-		routing_mode = RMODE_ROUTER;
-
-	get_config_bool(lookup_config(config_tree, "PriorityInheritance"),
-					&priorityinheritance);
-#if !defined(SOL_IP) || !defined(IP_TOS)
-	if(priorityinheritance)
-		logger(DEBUG_ALWAYS, LOG_WARNING, _("PriorityInheritance not supported on this platform"));
-#endif
-
-	if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
-		macexpire = 600;
-
-	if(get_config_int
-	   (lookup_config(myself->connection->config_tree, "MaxTimeout"),
-		&maxtimeout)) {
-		if(maxtimeout <= 0) {
-			logger(DEBUG_ALWAYS, LOG_ERR, _("Bogus maximum timeout!"));
-			return -1;
-		}
-	} 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(DEBUG_ALWAYS, LOG_ERR, _("Invalid address family!"));
-			return -1;
-		}
-		free(afname);
+	if(!check_id(name)) {
+		return true;
 	}
 
-	get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
+	node_t *n = lookup_node(mesh, name);
 
-	/* Generate packet encryption key */
+	if(n) {
+		return true;
+	}
 
-	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);
+	n = new_node();
+	n->name = xstrdup(name);
 
-			if(!myself->cipher) {
-				logger(DEBUG_ALWAYS, LOG_ERR, _("Unrecognized cipher type!"));
-				return -1;
-			}
-		}
-	} else
-		myself->cipher = EVP_bf_cbc();
+	config_t config;
+	packmsg_input_t in;
 
-	if(myself->cipher)
-		myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
-	else
-		myself->keylength = 1;
+	if(!node_get_config(mesh, n, &config, &in)) {
+		free_node(n);
+		return false;
+	}
 
-	myself->connection->outcipher = EVP_bf_ofb();
+	if(!node_read_from_config(mesh, n, &config)) {
+		logger(mesh, MESHLINK_ERROR, "Invalid config file for node %s", n->name);
+		config_free(&config);
+		free_node(n);
+		return false;
+	}
 
-	myself->key = (char *) xmalloc(myself->keylength);
-	RAND_pseudo_bytes(myself->key, myself->keylength);
+	config_free(&config);
 
-	if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
-		keylifetime = 3600;
+	node_add(mesh, n);
 
-	keyexpires = now + keylifetime;
-	
-	EVP_CIPHER_CTX_init(&packet_ctx);
-	EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, myself->key, myself->key + myself->cipher->key_len);
+	return true;
+}
 
-	/* Check if we want to use message authentication codes... */
+/*
+  Add listening sockets.
+*/
+static bool add_listen_address(meshlink_handle_t *mesh, char *address, bool bindto) {
+	char *port = mesh->myport;
 
-	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);
+	if(address) {
+		char *space = strchr(address, ' ');
 
-			if(!myself->digest) {
-				logger(DEBUG_ALWAYS, LOG_ERR, _("Unrecognized digest type!"));
-				return -1;
-			}
-		}
-	} 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(DEBUG_ALWAYS, LOG_ERR, _("MAC length exceeds size of digest!"));
-				return -1;
-			} else if(myself->maclength < 0) {
-				logger(DEBUG_ALWAYS, LOG_ERR, _("Bogus MAC length!"));
-				return -1;
-			}
+		if(space) {
+			*space++ = 0;
+			port = space;
 		}
-	} else
-		myself->maclength = 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(DEBUG_ALWAYS, LOG_ERR, _("Bogus compression level!"));
-			return -1;
+		if(!strcmp(address, "*")) {
+			*address = 0;
 		}
-	} else
-		myself->compression = 0;
+	}
 
-	myself->connection->outcompression = 0;
+	struct addrinfo *ai;
 
-	/* Done */
+	struct addrinfo hint = {
+		.ai_family = AF_UNSPEC,
+		.ai_socktype = SOCK_STREAM,
+		.ai_protocol = IPPROTO_TCP,
+		.ai_flags = AI_PASSIVE,
+	};
 
-	myself->nexthop = myself;
-	myself->via = myself;
-	myself->status.active = 1;
-	myself->status.reachable = 1;
-	node_add(myself);
+	int err = getaddrinfo(address && *address ? address : NULL, port, &hint, &ai);
 
-	graph();
+	free(address);
 
-	/* Open sockets */
-
-	memset(&hint, 0, sizeof(hint));
+	if(err || !ai) {
+		logger(mesh, MESHLINK_ERROR, "System call `%s' failed: %s", "getaddrinfo", err == EAI_SYSTEM ? strerror(err) : gai_strerror(err));
+		return false;
+	}
 
-	get_config_string(lookup_config(config_tree, "BindToAddress"), &address);
+	bool success = false;
 
-	hint.ai_family = addressfamily;
-	hint.ai_socktype = SOCK_STREAM;
-	hint.ai_protocol = IPPROTO_TCP;
-	hint.ai_flags = AI_PASSIVE;
+	for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
+		// Ignore duplicate addresses
+		bool found = false;
 
-	err = getaddrinfo(address, myport, &hint, &ai);
+		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(err || !ai) {
-		logger(DEBUG_ALWAYS, LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo",
-			   gai_strerror(err));
-		return -1;
-	}
+		if(found) {
+			continue;
+		}
 
-	listen_sockets = 0;
+		if(mesh->listen_sockets >= MAXSOCKETS) {
+			logger(mesh, MESHLINK_ERROR, "Too many listening sockets");
+			return false;
+		}
 
-	for(aip = ai; aip; aip = aip->ai_next) {
-		listen_socket[listen_sockets].tcp =
-			setup_listen_socket((sockaddr_t *) aip->ai_addr);
+		int tcp_fd = setup_listen_socket((sockaddr_t *) aip->ai_addr);
 
-		if(listen_socket[listen_sockets].tcp < 0)
+		if(tcp_fd < 0) {
 			continue;
+		}
 
-		listen_socket[listen_sockets].udp =
-			setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
+		int udp_fd = setup_vpn_in_socket(mesh, (sockaddr_t *) aip->ai_addr);
 
-		if(listen_socket[listen_sockets].udp < 0)
+		if(udp_fd < 0) {
+			close(tcp_fd);
 			continue;
+		}
+
+		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);
 
-		if(debug_level >= DEBUG_CONNECTIONS) {
-			hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
-			logger(DEBUG_ALWAYS, LOG_NOTICE, _("Listening on %s"), hostname);
+		if(mesh->log_level >= MESHLINK_INFO) {
+			char *hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
+			logger(mesh, MESHLINK_INFO, "Listening on %s", hostname);
 			free(hostname);
 		}
 
-		listen_socket[listen_sockets].sa.sa = *aip->ai_addr;
-		listen_sockets++;
-	}
+		mesh->listen_socket[mesh->listen_sockets].bindto = bindto;
+		memcpy(&mesh->listen_socket[mesh->listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
+		memcpy(&mesh->listen_socket[mesh->listen_sockets].broadcast_sa, aip->ai_addr, aip->ai_addrlen);
 
-	freeaddrinfo(ai);
+		if(aip->ai_family == AF_INET6) {
+			mesh->listen_socket[mesh->listen_sockets].broadcast_sa.in6.sin6_addr.s6_addr[0x0] = 0xff;
+			mesh->listen_socket[mesh->listen_sockets].broadcast_sa.in6.sin6_addr.s6_addr[0x1] = 0x02;
+			mesh->listen_socket[mesh->listen_sockets].broadcast_sa.in6.sin6_addr.s6_addr[0xf] = 0x01;
+		} else {
+			mesh->listen_socket[mesh->listen_sockets].broadcast_sa.in.sin_addr.s_addr = 0xffffffff;
+		}
 
-	if(listen_sockets)
-		logger(DEBUG_ALWAYS, LOG_NOTICE, _("Ready"));
-	else {
-		logger(DEBUG_ALWAYS, LOG_ERR, _("Unable to create any listening socket!"));
-		return -1;
+		mesh->listen_sockets++;
+		success = true;
 	}
 
-	return 0;
+	freeaddrinfo(ai);
+	return success;
 }
 
 /*
-  setup all initial network connections
+  Configure node_t mesh->self and set up the local sockets (listen only)
 */
-int setup_network_connections(void)
-{
-	char *envp[5];
-	int i;
+bool setup_myself(meshlink_handle_t *mesh) {
+	/* Set some defaults */
 
-	cp();
+	mesh->maxtimeout = 900;
 
-	now = time(NULL);
+	/* Done */
 
-	init_connections();
-	init_subnets();
-	init_nodes();
-	init_edges();
-	init_events();
-	init_requests();
+	mesh->self->nexthop = mesh->self;
 
-	if(get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout)) {
-		if(pingtimeout < 1) {
-			pingtimeout = 86400;
-		}
-	} else
-		pingtimeout = 60;
+	node_add(mesh, mesh->self);
 
-	if(setup_device() < 0)
-		return -1;
+	if(!config_scan_all(mesh, "current", "hosts", load_node, NULL)) {
+		logger(mesh, MESHLINK_WARNING, "Could not scan all host config files");
+	}
 
-	if(setup_myself() < 0)
-		return -1;
+	/* Open sockets */
 
-	/* 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", interface ? : "");
-	asprintf(&envp[3], "NAME=%s", myself->name);
-	envp[4] = NULL;
+	mesh->listen_sockets = 0;
 
-	execute_script("tinc-up", envp);
+	if(!add_listen_address(mesh, NULL, NULL)) {
+		if(strcmp(mesh->myport, "0")) {
+			logger(mesh, MESHLINK_INFO, "Could not bind to port %s, asking OS to choose one for us", mesh->myport);
+			free(mesh->myport);
+			mesh->myport = strdup("0");
 
-	for(i = 0; i < 5; i++)
-		free(envp[i]);
+			if(!mesh->myport) {
+				return false;
+			}
 
-	try_outgoing_connections();
+			if(!add_listen_address(mesh, NULL, NULL)) {
+				return false;
+			}
+		} else {
+			return false;
+		}
+	}
 
-	return 0;
-}
+	if(!mesh->listen_sockets) {
+		logger(mesh, MESHLINK_ERROR, "Unable to create any listening socket!");
+		return false;
+	}
 
-/*
-  close all open network connections
-*/
-void close_network_connections(void)
-{
-	avl_node_t *node, *next;
-	connection_t *c;
-	char *envp[5];
-	int i;
+	/* Done. */
 
-	cp();
+	mesh->last_config_check = mesh->loop.now.tv_sec;
+	mesh->last_unreachable = mesh->loop.now.tv_sec;
 
-	for(node = connection_tree->head; node; node = next) {
-		next = node->next;
-		c = (connection_t *) node->data;
+	return true;
+}
 
-		if(c->outgoing)
-			free(c->outgoing->name), free(c->outgoing), c->outgoing = NULL;
-		terminate_connection(c, 0);
+/*
+  initialize network
+*/
+bool setup_network(meshlink_handle_t *mesh) {
+	init_connections(mesh);
+	init_submeshes(mesh);
+	init_nodes(mesh);
+	init_edges(mesh);
+	init_requests(mesh);
+
+	if(!setup_myself(mesh)) {
+		return false;
 	}
 
-	if(myself && myself->connection)
-		terminate_connection(myself->connection, 0);
+	return true;
+}
 
-	for(i = 0; i < listen_sockets; i++) {
-		close(listen_socket[i].tcp);
-		close(listen_socket[i].udp);
+/*
+  close all open network connections
+*/
+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);
+		}
 	}
 
-	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", interface ? : "");
-	asprintf(&envp[3], "NAME=%s", myself->name);
-	envp[4] = NULL;
+	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);
+	}
 
-	execute_script("tinc-down", envp);
+	exit_requests(mesh);
+	exit_edges(mesh);
+	exit_nodes(mesh);
+	exit_submeshes(mesh);
+	exit_connections(mesh);
 
-	for(i = 0; i < 4; i++)
-		free(envp[i]);
+	free(mesh->myport);
+	mesh->myport = NULL;
 
-	close_device();
+	mesh->self = NULL;
 
 	return;
 }