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- /*
- net_setup.c -- Setup.
- Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2014 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
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- 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.,
- 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 "avl_tree.h"
- #include "conf.h"
- #include "connection.h"
- #include "device.h"
- #include "event.h"
- #include "graph.h"
- #include "logger.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;
- devops_t devops;
- char *proxyhost;
- char *proxyport;
- char *proxyuser;
- char *proxypass;
- proxytype_t proxytype;
- bool read_rsa_public_key(connection_t *c) {
- FILE *fp;
- char *pubname;
- char *hcfname;
- char *key;
- 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)) {
- 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;
- }
- /* Else, check for PublicKeyFile statement and read it */
- 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", pubname, strerror(errno));
- free(pubname);
- return false;
- }
- c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
- if(c->rsa_key) {
- free(pubname);
- return true; /* Woohoo. */
- }
- /* If it fails, try PEM_read_RSA_PUBKEY. */
- fp = fopen(pubname, "r");
- if(!fp) {
- logger(LOG_ERR, "Error reading RSA public key file `%s': %s", pubname, strerror(errno));
- free(pubname);
- return false;
- }
- 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", pubname, strerror(errno));
- free(pubname);
- return false;
- }
- /* Else, check if a harnessed public key is in the config file */
- xasprintf(&hcfname, "%s/hosts/%s", confbase, c->name);
- fp = fopen(hcfname, "r");
- if(!fp) {
- logger(LOG_ERR, "Error reading RSA public key file `%s': %s", hcfname, strerror(errno));
- free(hcfname);
- return false;
- }
- c->rsa_key = PEM_read_RSAPublicKey(fp, &c->rsa_key, NULL, NULL);
- fclose(fp);
- if(c->rsa_key) {
- free(hcfname);
- return true;
- }
- /* Try again with PEM_read_RSA_PUBKEY. */
- fp = fopen(hcfname, "r");
- if(!fp) {
- logger(LOG_ERR, "Error reading RSA public key file `%s': %s", hcfname, strerror(errno));
- free(hcfname);
- return false;
- }
- 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);
- return false;
- }
- static bool read_rsa_private_key(void) {
- FILE *fp;
- char *fname, *key, *pubkey;
- if(get_config_string(lookup_config(config_tree, "PrivateKey"), &key)) {
- myself->connection->rsa_key = RSA_new();
- // RSA_blinding_on(myself->connection->rsa_key, NULL);
- if(BN_hex2bn(&myself->connection->rsa_key->d, key) != strlen(key)) {
- logger(LOG_ERR, "Invalid PrivateKey for myself!");
- free(key);
- return false;
- }
- free(key);
- if(!get_config_string(lookup_config(config_tree, "PublicKey"), &pubkey)) {
- logger(LOG_ERR, "PrivateKey used but no PublicKey found!");
- return false;
- }
- if(BN_hex2bn(&myself->connection->rsa_key->n, pubkey) != strlen(pubkey)) {
- logger(LOG_ERR, "Invalid PublicKey for myself!");
- free(pubkey);
- return false;
- }
- free(pubkey);
- BN_hex2bn(&myself->connection->rsa_key->e, "FFFF");
- return true;
- }
- if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
- xasprintf(&fname, "%s/rsa_key.priv", confbase);
- fp = fopen(fname, "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)
- struct stat s;
- if(!fstat(fileno(fp), &s)) {
- if(s.st_mode & ~0100700)
- logger(LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
- } else {
- logger(LOG_WARNING, "Could not stat RSA private key file `%s': %s'", fname, strerror(errno));
- }
- #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",
- fname, strerror(errno));
- free(fname);
- return false;
- }
- free(fname);
- 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);
- char hostname[32] = "";
- if(!envname) {
- if(strcmp(name + 1, "HOST")) {
- fprintf(stderr, "Invalid Name: environment variable %s does not exist\n", name + 1);
- free(name);
- return false;
- }
- if(gethostname(hostname, sizeof hostname) || !*hostname) {
- fprintf(stderr, "Could not get hostname: %s\n", strerror(errno));
- free(name);
- return false;
- }
- hostname[31] = 0;
- envname = hostname;
- }
- 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)
- */
- static bool setup_myself(void) {
- config_t *cfg;
- subnet_t *subnet;
- char *name, *hostname, *mode, *afname, *cipher, *digest, *type;
- char *fname = NULL;
- char *address = NULL;
- char *proxy = NULL;
- char *space;
- char *envp[5] = {NULL};
- struct addrinfo *ai, *aip, hint = {0};
- bool choice;
- int i, err;
- int replaywin_int;
- bool port_specified = false;
- myself = new_node();
- myself->connection = new_connection();
- myself->hostname = xstrdup("MYSELF");
- myself->connection->hostname = xstrdup("MYSELF");
- myself->connection->options = 0;
- myself->connection->protocol_version = PROT_CURRENT;
- if(!(name = get_name())) {
- logger(LOG_ERR, "Name for tinc daemon required!");
- return false;
- }
- /* Read tinc.conf and our own host config file */
- 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_rsa_private_key())
- return false;
- if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
- myport = xstrdup("655");
- else
- port_specified = true;
- /* Ensure myport is numeric */
- 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(get_config_string(lookup_config(config_tree, "Proxy"), &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);
- free(proxy);
- return false;
- }
- switch(proxytype) {
- case PROXY_NONE:
- default:
- break;
- case PROXY_EXEC:
- if(!space || !*space) {
- logger(LOG_ERR, "Argument expected for proxy type exec!");
- free(proxy);
- 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!");
- free(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(config_tree, "Subnet");
- while(cfg) {
- if(!get_config_subnet(cfg, &subnet))
- return false;
- subnet_add(myself, subnet);
- cfg = lookup_config_next(config_tree, cfg);
- }
- /* Check some options */
- if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice)
- myself->options |= OPTION_INDIRECT;
- if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
- myself->options |= OPTION_TCPONLY;
- 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"))
- 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!");
- free(mode);
- return false;
- }
- free(mode);
- }
- 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!");
- free(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!");
- free(mode);
- return false;
- }
- free(mode);
- }
- #if !defined(SOL_IP) || !defined(IP_TOS)
- if(priorityinheritance)
- logger(LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");
- #endif
- if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
- macexpire = 600;
- 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_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;
- else if(!strcasecmp(afname, "IPv6"))
- addressfamily = AF_INET6;
- else if(!strcasecmp(afname, "any"))
- addressfamily = AF_UNSPEC;
- else {
- logger(LOG_ERR, "Invalid address family!");
- free(afname);
- return false;
- }
- free(afname);
- }
- get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
- /* Generate packet encryption key */
- if(get_config_string(lookup_config(config_tree, "Cipher"), &cipher)) {
- if(!strcasecmp(cipher, "none")) {
- myself->incipher = NULL;
- } else {
- myself->incipher = EVP_get_cipherbyname(cipher);
- if(!myself->incipher) {
- logger(LOG_ERR, "Unrecognized cipher type!");
- free(cipher);
- return false;
- }
- }
- free(cipher);
- } else
- myself->incipher = EVP_bf_cbc();
- if(myself->incipher)
- myself->inkeylength = myself->incipher->key_len + myself->incipher->iv_len;
- else
- myself->inkeylength = 1;
- myself->connection->outcipher = EVP_bf_ofb();
- if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
- keylifetime = 3600;
- keyexpires = now + keylifetime;
-
- /* Check if we want to use message authentication codes... */
- if(get_config_string(lookup_config(config_tree, "Digest"), &digest)) {
- if(!strcasecmp(digest, "none")) {
- myself->indigest = NULL;
- } else {
- myself->indigest = EVP_get_digestbyname(digest);
- if(!myself->indigest) {
- logger(LOG_ERR, "Unrecognized digest type!");
- free(digest);
- return false;
- }
- }
- free(digest);
- } else
- myself->indigest = EVP_sha1();
- myself->connection->outdigest = EVP_sha1();
- 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->inmaclength < 0) {
- logger(LOG_ERR, "Bogus MAC length!");
- return false;
- }
- }
- } else
- myself->inmaclength = 4;
- myself->connection->outmaclength = 0;
- /* Compression */
- 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->incompression = 0;
- myself->connection->outcompression = 0;
- /* Done */
- myself->nexthop = myself;
- myself->via = myself;
- myself->status.reachable = true;
- node_add(myself);
- graph();
- if(strictsubnets)
- load_all_subnets();
- /* Open 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
- free(type);
- }
- if(!devops.setup())
- return false;
- /* Run tinc-up script to further initialize the tap interface */
- 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 < 4; i++)
- free(envp[i]);
- /* Run subnet-up scripts for our own subnets */
- subnet_update(myself, NULL, true);
- /* Open sockets */
- if(!do_detach && getenv("LISTEN_FDS")) {
- sockaddr_t sa;
- socklen_t salen;
- listen_sockets = atoi(getenv("LISTEN_FDS"));
- #ifdef HAVE_UNSETENV
- unsetenv("LISTEN_FDS");
- #endif
- if(listen_sockets > MAXSOCKETS) {
- logger(LOG_ERR, "Too many listening sockets");
- return false;
- }
- 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;
- }
- listen_socket[i].tcp = i + 3;
- #ifdef FD_CLOEXEC
- fcntl(i + 3, F_SETFD, FD_CLOEXEC);
- #endif
- listen_socket[i].udp = setup_vpn_in_socket(&sa);
- if(listen_socket[i].udp < 0)
- return false;
- ifdebug(CONNECTIONS) {
- hostname = sockaddr2hostname(&sa);
- 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;
- }
- 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;
- 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_ERR, "Unable to create any listening socket!");
- return false;
- }
- /* If no Port option was specified, set myport to the port used by the first listening socket. */
- if(!port_specified) {
- sockaddr_t sa;
- socklen_t salen = sizeof sa;
- if(!getsockname(listen_socket[0].udp, &sa.sa, &salen)) {
- free(myport);
- sockaddr2str(&sa, NULL, &myport);
- if(!myport)
- myport = xstrdup("655");
- }
- }
- /* Done. */
- logger(LOG_NOTICE, "Ready");
- return true;
- }
- /*
- initialize network
- */
- bool setup_network(void) {
- now = time(NULL);
- init_events();
- init_connections();
- init_subnets();
- init_nodes();
- init_edges();
- init_requests();
- if(get_config_int(lookup_config(config_tree, "PingInterval"), &pinginterval)) {
- if(pinginterval < 1) {
- pinginterval = 86400;
- }
- } else
- 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;
- return true;
- }
- /*
- close all open network connections
- */
- void close_network_connections(void) {
- avl_node_t *node, *next;
- connection_t *c;
- char *envp[5] = {NULL};
- int i;
- for(node = connection_tree->head; node; node = next) {
- next = node->next;
- c = node->data;
- 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++) {
- close(listen_socket[i].tcp);
- 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_edges();
- exit_subnets();
- exit_nodes();
- exit_connections();
- exit_events();
- execute_script("tinc-down", envp);
- if(myport) free(myport);
- for(i = 0; i < 4; i++)
- free(envp[i]);
- devops.close();
- return;
- }
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