1005 lines
25 KiB
C
1005 lines
25 KiB
C
/*
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net_setup.c -- Setup.
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Copyright (C) 1998-2005 Ivo Timmermans,
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2000-2012 Guus Sliepen <guus@tinc-vpn.org>
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2006 Scott Lamb <slamb@slamb.org>
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2010 Brandon Black <blblack@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "system.h"
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#include "splay_tree.h"
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#include "cipher.h"
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#include "conf.h"
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#include "connection.h"
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#include "control.h"
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#include "device.h"
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#include "digest.h"
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#include "ecdsa.h"
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#include "graph.h"
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#include "logger.h"
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#include "net.h"
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#include "netutl.h"
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#include "process.h"
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#include "protocol.h"
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#include "route.h"
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#include "rsa.h"
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#include "subnet.h"
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#include "utils.h"
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#include "xalloc.h"
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char *myport;
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static struct event device_ev;
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devops_t devops;
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char *proxyhost;
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char *proxyport;
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char *proxyuser;
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char *proxypass;
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proxytype_t proxytype;
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bool node_read_ecdsa_public_key(node_t *n) {
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if(ecdsa_active(&n->ecdsa))
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return true;
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splay_tree_t *config_tree;
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FILE *fp;
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char *fname;
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char *p;
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bool result = false;
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xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name);
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init_configuration(&config_tree);
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if(!read_config_file(config_tree, fname))
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goto exit;
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/* First, check for simple ECDSAPublicKey statement */
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if(get_config_string(lookup_config(config_tree, "ECDSAPublicKey"), &p)) {
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result = ecdsa_set_base64_public_key(&n->ecdsa, p);
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free(p);
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goto exit;
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}
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/* Else, check for ECDSAPublicKeyFile statement and read it */
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free(fname);
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if(!get_config_string(lookup_config(config_tree, "ECDSAPublicKeyFile"), &fname))
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xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name);
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fp = fopen(fname, "r");
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if(!fp) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s", fname, strerror(errno));
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goto exit;
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}
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result = ecdsa_read_pem_public_key(&n->ecdsa, fp);
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fclose(fp);
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exit:
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exit_configuration(&config_tree);
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free(fname);
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return result;
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}
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bool read_ecdsa_public_key(connection_t *c) {
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FILE *fp;
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char *fname;
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char *p;
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bool result;
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/* First, check for simple ECDSAPublicKey statement */
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if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) {
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result = ecdsa_set_base64_public_key(&c->ecdsa, p);
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free(p);
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return result;
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}
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/* Else, check for ECDSAPublicKeyFile statement and read it */
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if(!get_config_string(lookup_config(c->config_tree, "ECDSAPublicKeyFile"), &fname))
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xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
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fp = fopen(fname, "r");
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if(!fp) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s",
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fname, strerror(errno));
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free(fname);
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return false;
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}
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result = ecdsa_read_pem_public_key(&c->ecdsa, fp);
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fclose(fp);
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if(!result)
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logger(DEBUG_ALWAYS, LOG_ERR, "Parsing ECDSA public key file `%s' failed.", fname);
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free(fname);
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return result;
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}
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bool read_rsa_public_key(connection_t *c) {
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FILE *fp;
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char *fname;
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char *n;
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bool result;
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/* First, check for simple PublicKey statement */
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if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &n)) {
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result = rsa_set_hex_public_key(&c->rsa, n, "FFFF");
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free(n);
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return result;
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}
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/* Else, check for PublicKeyFile statement and read it */
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if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
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xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
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fp = fopen(fname, "r");
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if(!fp) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno));
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free(fname);
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return false;
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}
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result = rsa_read_pem_public_key(&c->rsa, fp);
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fclose(fp);
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if(!result)
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logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno));
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free(fname);
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return result;
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}
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static bool read_ecdsa_private_key(void) {
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FILE *fp;
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char *fname;
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bool result;
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/* Check for PrivateKeyFile statement and read it */
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if(!get_config_string(lookup_config(config_tree, "ECDSAPrivateKeyFile"), &fname))
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xasprintf(&fname, "%s" SLASH "ecdsa_key.priv", confbase);
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fp = fopen(fname, "r");
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if(!fp) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA private key file `%s': %s", fname, strerror(errno));
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free(fname);
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return false;
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}
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#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
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struct stat s;
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if(fstat(fileno(fp), &s)) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat ECDSA private key file `%s': %s'", fname, strerror(errno));
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free(fname);
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return false;
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}
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if(s.st_mode & ~0100700)
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logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for ECDSA private key file `%s'!", fname);
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#endif
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result = ecdsa_read_pem_private_key(&myself->connection->ecdsa, fp);
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fclose(fp);
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if(!result)
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logger(DEBUG_ALWAYS, LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", fname, strerror(errno));
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free(fname);
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return result;
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}
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static bool read_rsa_private_key(void) {
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FILE *fp;
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char *fname;
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char *n, *d;
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bool result;
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/* First, check for simple PrivateKey statement */
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if(get_config_string(lookup_config(config_tree, "PrivateKey"), &d)) {
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if(!get_config_string(lookup_config(config_tree, "PublicKey"), &n)) {
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logger(DEBUG_ALWAYS, LOG_ERR, "PrivateKey used but no PublicKey found!");
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free(d);
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return false;
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}
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result = rsa_set_hex_private_key(&myself->connection->rsa, n, "FFFF", d);
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free(n);
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free(d);
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return true;
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}
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/* Else, check for PrivateKeyFile statement and read it */
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if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
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xasprintf(&fname, "%s" SLASH "rsa_key.priv", confbase);
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fp = fopen(fname, "r");
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if(!fp) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Error reading RSA private key file `%s': %s",
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fname, strerror(errno));
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free(fname);
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return false;
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}
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#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
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struct stat s;
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if(fstat(fileno(fp), &s)) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Could not stat RSA private key file `%s': %s'", fname, strerror(errno));
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free(fname);
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return false;
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}
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if(s.st_mode & ~0100700)
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logger(DEBUG_ALWAYS, LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
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#endif
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result = rsa_read_pem_private_key(&myself->connection->rsa, fp);
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fclose(fp);
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if(!result)
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logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno));
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free(fname);
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return result;
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}
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static struct event keyexpire_event;
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static void keyexpire_handler(int fd, short events, void *data) {
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regenerate_key();
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}
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void regenerate_key(void) {
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if(timeout_initialized(&keyexpire_event)) {
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logger(DEBUG_STATUS, LOG_INFO, "Expiring symmetric keys");
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event_del(&keyexpire_event);
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send_key_changed();
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} else {
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timeout_set(&keyexpire_event, keyexpire_handler, NULL);
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}
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event_add(&keyexpire_event, &(struct timeval){keylifetime, 0});
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}
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/*
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Read Subnets from all host config files
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*/
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void load_all_subnets(void) {
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DIR *dir;
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struct dirent *ent;
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char *dname;
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char *fname;
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splay_tree_t *config_tree;
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config_t *cfg;
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subnet_t *s, *s2;
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node_t *n;
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xasprintf(&dname, "%s" SLASH "hosts", confbase);
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dir = opendir(dname);
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if(!dir) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
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free(dname);
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return;
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}
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while((ent = readdir(dir))) {
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if(!check_id(ent->d_name))
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continue;
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n = lookup_node(ent->d_name);
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#ifdef _DIRENT_HAVE_D_TYPE
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//if(ent->d_type != DT_REG)
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// continue;
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#endif
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xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, ent->d_name);
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init_configuration(&config_tree);
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read_config_options(config_tree, ent->d_name);
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read_config_file(config_tree, fname);
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free(fname);
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if(!n) {
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n = new_node();
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n->name = xstrdup(ent->d_name);
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node_add(n);
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}
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for(cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
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if(!get_config_subnet(cfg, &s))
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continue;
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if((s2 = lookup_subnet(n, s))) {
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s2->expires = -1;
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} else {
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subnet_add(n, s);
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}
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}
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exit_configuration(&config_tree);
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}
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closedir(dir);
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}
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char *get_name(void) {
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char *name = NULL;
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get_config_string(lookup_config(config_tree, "Name"), &name);
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if(!name)
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return NULL;
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if(*name == '$') {
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char *envname = getenv(name + 1);
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if(!envname) {
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if(strcmp(name + 1, "HOST")) {
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fprintf(stderr, "Invalid Name: environment variable %s does not exist\n", name + 1);
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return false;
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}
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envname = alloca(32);
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if(gethostname(envname, 32)) {
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fprintf(stderr, "Could not get hostname: %s\n", strerror(errno));
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return false;
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}
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envname[31] = 0;
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}
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free(name);
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name = xstrdup(envname);
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for(char *c = name; *c; c++)
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if(!isalnum(*c))
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*c = '_';
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}
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if(!check_id(name)) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Invalid name for myself!");
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free(name);
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return false;
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}
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return name;
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}
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bool setup_myself_reloadable(void) {
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char *proxy = NULL;
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char *mode = NULL;
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char *afname = NULL;
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char *space;
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bool choice;
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get_config_string(lookup_config(config_tree, "Proxy"), &proxy);
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if(proxy) {
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if((space = strchr(proxy, ' ')))
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*space++ = 0;
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if(!strcasecmp(proxy, "none")) {
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proxytype = PROXY_NONE;
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} else if(!strcasecmp(proxy, "socks4")) {
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proxytype = PROXY_SOCKS4;
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} else if(!strcasecmp(proxy, "socks4a")) {
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proxytype = PROXY_SOCKS4A;
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} else if(!strcasecmp(proxy, "socks5")) {
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proxytype = PROXY_SOCKS5;
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} else if(!strcasecmp(proxy, "http")) {
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proxytype = PROXY_HTTP;
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} else if(!strcasecmp(proxy, "exec")) {
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proxytype = PROXY_EXEC;
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} else {
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logger(DEBUG_ALWAYS, LOG_ERR, "Unknown proxy type %s!", proxy);
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return false;
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}
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switch(proxytype) {
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case PROXY_NONE:
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default:
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break;
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case PROXY_EXEC:
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if(!space || !*space) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Argument expected for proxy type exec!");
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return false;
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}
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proxyhost = xstrdup(space);
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break;
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case PROXY_SOCKS4:
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case PROXY_SOCKS4A:
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case PROXY_SOCKS5:
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case PROXY_HTTP:
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proxyhost = space;
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if(space && (space = strchr(space, ' ')))
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*space++ = 0, proxyport = space;
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if(space && (space = strchr(space, ' ')))
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*space++ = 0, proxyuser = space;
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if(space && (space = strchr(space, ' ')))
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*space++ = 0, proxypass = space;
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if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Host and port argument expected for proxy!");
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return false;
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}
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proxyhost = xstrdup(proxyhost);
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proxyport = xstrdup(proxyport);
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if(proxyuser && *proxyuser)
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proxyuser = xstrdup(proxyuser);
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if(proxypass && *proxypass)
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proxypass = xstrdup(proxypass);
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break;
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}
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free(proxy);
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}
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if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice)
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myself->options |= OPTION_INDIRECT;
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if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
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myself->options |= OPTION_TCPONLY;
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if(myself->options & OPTION_TCPONLY)
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myself->options |= OPTION_INDIRECT;
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get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
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get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
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if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
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if(!strcasecmp(mode, "router"))
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routing_mode = RMODE_ROUTER;
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else if(!strcasecmp(mode, "switch"))
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routing_mode = RMODE_SWITCH;
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else if(!strcasecmp(mode, "hub"))
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routing_mode = RMODE_HUB;
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else {
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logger(DEBUG_ALWAYS, LOG_ERR, "Invalid routing mode!");
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return false;
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}
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free(mode);
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}
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if(get_config_string(lookup_config(config_tree, "Forwarding"), &mode)) {
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if(!strcasecmp(mode, "off"))
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forwarding_mode = FMODE_OFF;
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else if(!strcasecmp(mode, "internal"))
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forwarding_mode = FMODE_INTERNAL;
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else if(!strcasecmp(mode, "kernel"))
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forwarding_mode = FMODE_KERNEL;
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else {
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logger(DEBUG_ALWAYS, LOG_ERR, "Invalid forwarding mode!");
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return false;
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}
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free(mode);
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}
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choice = true;
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get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice);
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if(choice)
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myself->options |= OPTION_PMTU_DISCOVERY;
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choice = true;
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get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice);
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if(choice)
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myself->options |= OPTION_CLAMP_MSS;
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get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
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get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl);
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if(get_config_string(lookup_config(config_tree, "Broadcast"), &mode)) {
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if(!strcasecmp(mode, "no"))
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broadcast_mode = BMODE_NONE;
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else if(!strcasecmp(mode, "yes") || !strcasecmp(mode, "mst"))
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broadcast_mode = BMODE_MST;
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else if(!strcasecmp(mode, "direct"))
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broadcast_mode = BMODE_DIRECT;
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else {
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logger(DEBUG_ALWAYS, LOG_ERR, "Invalid broadcast mode!");
|
|
return false;
|
|
}
|
|
free(mode);
|
|
}
|
|
|
|
#if !defined(SOL_IP) || !defined(IP_TOS)
|
|
if(priorityinheritance)
|
|
logger(DEBUG_ALWAYS, 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(DEBUG_ALWAYS, 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(DEBUG_ALWAYS, LOG_ERR, "Invalid address family!");
|
|
return false;
|
|
}
|
|
free(afname);
|
|
}
|
|
|
|
get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
|
|
|
|
if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
|
|
keylifetime = 3600;
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
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, *cipher, *digest, *type;
|
|
char *fname = NULL;
|
|
char *address = NULL;
|
|
char *envp[5];
|
|
struct addrinfo *ai, *aip, hint = {0};
|
|
int i, err;
|
|
int replaywin_int;
|
|
|
|
myself = new_node();
|
|
myself->connection = new_connection();
|
|
|
|
myself->hostname = xstrdup("MYSELF");
|
|
myself->connection->hostname = xstrdup("MYSELF");
|
|
|
|
myself->connection->options = 0;
|
|
myself->connection->protocol_major = PROT_MAJOR;
|
|
myself->connection->protocol_minor = PROT_MINOR;
|
|
|
|
myself->options |= PROT_MINOR << 24;
|
|
|
|
if(!(name = get_name())) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Name for tinc daemon required!");
|
|
return false;
|
|
}
|
|
|
|
myself->name = name;
|
|
myself->connection->name = xstrdup(name);
|
|
xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
|
|
read_config_options(config_tree, name);
|
|
read_config_file(config_tree, fname);
|
|
free(fname);
|
|
|
|
get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental);
|
|
|
|
if(experimental && !read_ecdsa_private_key())
|
|
return false;
|
|
|
|
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);
|
|
}
|
|
|
|
/* 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(!setup_myself_reloadable())
|
|
return false;
|
|
|
|
get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
|
|
get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
|
|
strictsubnets |= tunnelserver;
|
|
|
|
|
|
|
|
if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
|
|
if(udp_rcvbuf <= 0) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "UDPRcvBuf cannot be negative!");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
|
|
if(udp_sndbuf <= 0) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "UDPSndBuf cannot be negative!");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
|
|
if(replaywin_int < 0) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "ReplayWindow cannot be negative!");
|
|
return false;
|
|
}
|
|
replaywin = (unsigned)replaywin_int;
|
|
}
|
|
|
|
/* Generate packet encryption key */
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher))
|
|
cipher = xstrdup("blowfish");
|
|
|
|
if(!cipher_open_by_name(&myself->incipher, cipher)) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized cipher type!");
|
|
return false;
|
|
}
|
|
|
|
regenerate_key();
|
|
|
|
/* Check if we want to use message authentication codes... */
|
|
|
|
int maclength = 4;
|
|
get_config_int(lookup_config(config_tree, "MACLength"), &maclength);
|
|
|
|
if(maclength < 0) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Bogus MAC length!");
|
|
return false;
|
|
}
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "Digest"), &digest))
|
|
digest = xstrdup("sha1");
|
|
|
|
if(!digest_open_by_name(&myself->indigest, digest, maclength)) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized digest type!");
|
|
return false;
|
|
}
|
|
|
|
/* Compression */
|
|
|
|
if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {
|
|
if(myself->incompression < 0 || myself->incompression > 11) {
|
|
logger(DEBUG_ALWAYS, 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;
|
|
myself->status.sptps = experimental;
|
|
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
|
|
}
|
|
|
|
if(!devops.setup())
|
|
return false;
|
|
|
|
if(device_fd >= 0) {
|
|
event_set(&device_ev, device_fd, EV_READ|EV_PERSIST, handle_device_data, NULL);
|
|
|
|
if (event_add(&device_ev, NULL) < 0) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno));
|
|
devops.close();
|
|
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);
|
|
envp[4] = NULL;
|
|
|
|
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(DEBUG_ALWAYS, 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(DEBUG_ALWAYS, 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;
|
|
|
|
event_set(&listen_socket[i].ev_tcp, listen_socket[i].tcp, EV_READ|EV_PERSIST, handle_new_meta_connection, NULL);
|
|
if(event_add(&listen_socket[i].ev_tcp, NULL) < 0) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno));
|
|
abort();
|
|
}
|
|
|
|
event_set(&listen_socket[i].ev_udp, listen_socket[i].udp, EV_READ|EV_PERSIST, handle_incoming_vpn_data, (void *)(intptr_t)listen_sockets);
|
|
if(event_add(&listen_socket[listen_sockets].ev_udp, NULL) < 0) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno));
|
|
abort();
|
|
}
|
|
|
|
if(debug_level >= DEBUG_CONNECTIONS) {
|
|
hostname = sockaddr2hostname(&sa);
|
|
logger(DEBUG_CONNECTIONS, 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(DEBUG_ALWAYS, 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(DEBUG_ALWAYS, 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) {
|
|
close(listen_socket[listen_sockets].tcp);
|
|
continue;
|
|
}
|
|
|
|
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(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno));
|
|
abort();
|
|
}
|
|
|
|
event_set(&listen_socket[listen_sockets].ev_udp,
|
|
listen_socket[listen_sockets].udp,
|
|
EV_READ|EV_PERSIST,
|
|
handle_incoming_vpn_data, (void *)(intptr_t)listen_sockets);
|
|
if(event_add(&listen_socket[listen_sockets].ev_udp, NULL) < 0) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "event_add failed: %s", strerror(errno));
|
|
abort();
|
|
}
|
|
|
|
if(debug_level >= DEBUG_CONNECTIONS) {
|
|
hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
|
|
logger(DEBUG_CONNECTIONS, 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(DEBUG_ALWAYS, LOG_NOTICE, "Ready");
|
|
else {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
initialize network
|
|
*/
|
|
bool setup_network(void) {
|
|
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) {
|
|
splay_node_t *node, *next;
|
|
connection_t *c;
|
|
char *envp[5];
|
|
int i;
|
|
|
|
for(node = connection_tree->head; node; node = next) {
|
|
next = node->next;
|
|
c = node->data;
|
|
c->outgoing = NULL;
|
|
terminate_connection(c, false);
|
|
}
|
|
|
|
list_delete_list(outgoing_list);
|
|
|
|
if(myself && myself->connection) {
|
|
subnet_update(myself, NULL, false);
|
|
terminate_connection(myself->connection, false);
|
|
free_connection(myself->connection);
|
|
}
|
|
|
|
for(i = 0; i < listen_sockets; i++) {
|
|
event_del(&listen_socket[i].ev_tcp);
|
|
event_del(&listen_socket[i].ev_udp);
|
|
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);
|
|
envp[4] = NULL;
|
|
|
|
exit_requests();
|
|
exit_edges();
|
|
exit_subnets();
|
|
exit_nodes();
|
|
exit_connections();
|
|
|
|
execute_script("tinc-down", envp);
|
|
|
|
if(myport) free(myport);
|
|
|
|
for(i = 0; i < 4; i++)
|
|
free(envp[i]);
|
|
|
|
devops.close();
|
|
|
|
return;
|
|
}
|