1324 lines
30 KiB
C
1324 lines
30 KiB
C
/*
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net_setup.c -- Setup.
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Copyright (C) 1998-2005 Ivo Timmermans,
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2000-2021 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 "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 "names.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 "script.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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#ifdef HAVE_MINIUPNPC
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#include "upnp.h"
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#endif
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char *myport;
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static io_t device_io;
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devops_t devops;
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bool device_standby = false;
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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 autoconnect;
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bool disablebuggypeers;
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char *scriptinterpreter;
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char *scriptextension;
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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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}
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splay_tree_t *config_tree;
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FILE *fp;
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char *pubname = NULL;
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char *p;
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init_configuration(&config_tree);
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if(!read_host_config(config_tree, n->name, true)) {
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goto exit;
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}
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/* First, check for simple Ed25519PublicKey statement */
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if(get_config_string(lookup_config(config_tree, "Ed25519PublicKey"), &p)) {
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n->ecdsa = ecdsa_set_base64_public_key(p);
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free(p);
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goto exit;
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}
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/* Else, check for Ed25519PublicKeyFile statement and read it */
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if(!get_config_string(lookup_config(config_tree, "Ed25519PublicKeyFile"), &pubname)) {
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xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name);
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}
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fp = fopen(pubname, "r");
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if(!fp) {
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goto exit;
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}
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n->ecdsa = ecdsa_read_pem_public_key(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(pubname);
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return n->ecdsa;
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}
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bool read_ecdsa_public_key(connection_t *c) {
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if(ecdsa_active(c->ecdsa)) {
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return true;
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}
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FILE *fp;
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char *fname;
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char *p;
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if(!c->config_tree) {
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init_configuration(&c->config_tree);
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if(!read_host_config(c->config_tree, c->name, true)) {
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return false;
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}
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}
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/* First, check for simple Ed25519PublicKey statement */
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if(get_config_string(lookup_config(c->config_tree, "Ed25519PublicKey"), &p)) {
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c->ecdsa = ecdsa_set_base64_public_key(p);
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free(p);
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return c->ecdsa;
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}
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/* Else, check for Ed25519PublicKeyFile statement and read it */
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if(!get_config_string(lookup_config(c->config_tree, "Ed25519PublicKeyFile"), &fname)) {
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xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
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}
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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 Ed25519 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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c->ecdsa = ecdsa_read_pem_public_key(fp);
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if(!c->ecdsa && errno != ENOENT) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Parsing Ed25519 public key file `%s' failed.", fname);
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}
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fclose(fp);
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free(fname);
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return c->ecdsa;
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}
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#ifndef DISABLE_LEGACY
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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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/* 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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c->rsa = rsa_set_hex_public_key(n, "FFFF");
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free(n);
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return c->rsa;
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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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}
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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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c->rsa = rsa_read_pem_public_key(fp);
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fclose(fp);
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if(!c->rsa) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno));
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}
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free(fname);
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return c->rsa;
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}
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#endif
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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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/* Check for PrivateKeyFile statement and read it */
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if(!get_config_string(lookup_config(config_tree, "Ed25519PrivateKeyFile"), &fname)) {
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xasprintf(&fname, "%s" SLASH "ed25519_key.priv", confbase);
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}
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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 Ed25519 private key file `%s': %s", fname, strerror(errno));
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if(errno == ENOENT) {
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logger(DEBUG_ALWAYS, LOG_INFO, "Create an Ed25519 key pair with `tinc -n %s generate-ed25519-keys'.", netname ? netname : ".");
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}
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free(fname);
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return false;
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}
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#ifndef HAVE_MINGW
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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 Ed25519 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 Ed25519 private key file `%s'!", fname);
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}
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#endif
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myself->connection->ecdsa = ecdsa_read_pem_private_key(fp);
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fclose(fp);
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if(!myself->connection->ecdsa) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Reading Ed25519 private key file `%s' failed", fname);
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}
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free(fname);
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return myself->connection->ecdsa;
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}
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static bool read_invitation_key(void) {
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FILE *fp;
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char fname[PATH_MAX];
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if(invitation_key) {
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ecdsa_free(invitation_key);
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invitation_key = NULL;
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}
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snprintf(fname, sizeof(fname), "%s" SLASH "invitations" SLASH "ed25519_key.priv", confbase);
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fp = fopen(fname, "r");
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if(fp) {
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invitation_key = ecdsa_read_pem_private_key(fp);
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fclose(fp);
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if(!invitation_key) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Reading Ed25519 private key file `%s' failed", fname);
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}
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}
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return invitation_key;
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}
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#ifndef DISABLE_LEGACY
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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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/* 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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myself->connection->rsa = rsa_set_hex_private_key(n, "FFFF", d);
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free(n);
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free(d);
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return myself->connection->rsa;
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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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}
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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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if(errno == ENOENT) {
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logger(DEBUG_ALWAYS, LOG_INFO, "Create an RSA key pair with `tinc -n %s generate-rsa-keys'.", netname ? netname : ".");
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}
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free(fname);
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return false;
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}
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#ifndef HAVE_MINGW
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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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}
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#endif
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myself->connection->rsa = rsa_read_pem_private_key(fp);
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fclose(fp);
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if(!myself->connection->rsa) {
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logger(DEBUG_ALWAYS, LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno));
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}
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free(fname);
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return myself->connection->rsa;
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}
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#endif
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#ifndef DISABLE_LEGACY
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static timeout_t keyexpire_timeout;
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static void keyexpire_handler(void *data) {
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regenerate_key();
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timeout_set(data, &(struct timeval) {
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keylifetime, rand() % 100000
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});
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}
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#endif
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void regenerate_key(void) {
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logger(DEBUG_STATUS, LOG_INFO, "Expiring symmetric keys");
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send_key_changed();
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for splay_each(node_t, n, node_tree) {
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n->status.validkey_in = false;
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}
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}
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void load_all_nodes(void) {
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DIR *dir;
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struct dirent *ent;
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char dname[PATH_MAX];
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snprintf(dname, sizeof(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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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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}
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node_t *n = lookup_node(ent->d_name);
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splay_tree_t *config_tree;
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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_host_config(config_tree, ent->d_name, true);
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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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if(strictsubnets) {
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for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
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subnet_t *s, *s2;
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if(!get_config_subnet(cfg, &s)) {
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continue;
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}
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if((s2 = lookup_subnet(n, s))) {
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s2->expires = -1;
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free(s);
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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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}
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if(lookup_config(config_tree, "Address")) {
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n->status.has_address = true;
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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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char *returned_name;
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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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}
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returned_name = replace_name(name);
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free(name);
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return returned_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 *rmode = NULL;
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char *fmode = NULL;
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char *bmode = NULL;
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char *afname = NULL;
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char *space;
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bool choice;
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free(scriptinterpreter);
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scriptinterpreter = NULL;
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get_config_string(lookup_config(config_tree, "ScriptsInterpreter"), &scriptinterpreter);
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free(scriptextension);
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if(!get_config_string(lookup_config(config_tree, "ScriptsExtension"), &scriptextension)) {
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scriptextension = xstrdup("");
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}
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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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}
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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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|
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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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|
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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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|
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proxyhost = xstrdup(space);
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break;
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|
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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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|
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if(space && (space = strchr(space, ' '))) {
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*space++ = 0, proxyport = space;
|
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}
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|
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if(space && (space = strchr(space, ' '))) {
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*space++ = 0, proxyuser = space;
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}
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|
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if(space && (space = strchr(space, ' '))) {
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*space++ = 0, proxypass = space;
|
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}
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|
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if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Host and port argument expected for proxy!");
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return false;
|
|
}
|
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|
|
proxyhost = xstrdup(proxyhost);
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proxyport = xstrdup(proxyport);
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|
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if(proxyuser && *proxyuser) {
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proxyuser = xstrdup(proxyuser);
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}
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|
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if(proxypass && *proxypass) {
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proxypass = xstrdup(proxypass);
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}
|
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|
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break;
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}
|
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|
|
free(proxy);
|
|
}
|
|
|
|
if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice) {
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|
myself->options |= OPTION_INDIRECT;
|
|
}
|
|
|
|
if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice) {
|
|
myself->options |= OPTION_TCPONLY;
|
|
}
|
|
|
|
if(myself->options & OPTION_TCPONLY) {
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|
myself->options |= OPTION_INDIRECT;
|
|
}
|
|
|
|
get_config_bool(lookup_config(config_tree, "UDPDiscovery"), &udp_discovery);
|
|
get_config_int(lookup_config(config_tree, "UDPDiscoveryKeepaliveInterval"), &udp_discovery_keepalive_interval);
|
|
get_config_int(lookup_config(config_tree, "UDPDiscoveryInterval"), &udp_discovery_interval);
|
|
get_config_int(lookup_config(config_tree, "UDPDiscoveryTimeout"), &udp_discovery_timeout);
|
|
|
|
get_config_int(lookup_config(config_tree, "MTUInfoInterval"), &mtu_info_interval);
|
|
get_config_int(lookup_config(config_tree, "UDPInfoInterval"), &udp_info_interval);
|
|
|
|
get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
|
|
get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
|
|
|
|
if(get_config_string(lookup_config(config_tree, "Mode"), &rmode)) {
|
|
if(!strcasecmp(rmode, "router")) {
|
|
routing_mode = RMODE_ROUTER;
|
|
} else if(!strcasecmp(rmode, "switch")) {
|
|
routing_mode = RMODE_SWITCH;
|
|
} else if(!strcasecmp(rmode, "hub")) {
|
|
routing_mode = RMODE_HUB;
|
|
} else {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Invalid routing mode!");
|
|
return false;
|
|
}
|
|
|
|
free(rmode);
|
|
}
|
|
|
|
if(get_config_string(lookup_config(config_tree, "Forwarding"), &fmode)) {
|
|
if(!strcasecmp(fmode, "off")) {
|
|
forwarding_mode = FMODE_OFF;
|
|
} else if(!strcasecmp(fmode, "internal")) {
|
|
forwarding_mode = FMODE_INTERNAL;
|
|
} else if(!strcasecmp(fmode, "kernel")) {
|
|
forwarding_mode = FMODE_KERNEL;
|
|
} else {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Invalid forwarding mode!");
|
|
return false;
|
|
}
|
|
|
|
free(fmode);
|
|
}
|
|
|
|
choice = !(myself->options & OPTION_TCPONLY);
|
|
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"), &bmode)) {
|
|
if(!strcasecmp(bmode, "no")) {
|
|
broadcast_mode = BMODE_NONE;
|
|
} else if(!strcasecmp(bmode, "yes") || !strcasecmp(bmode, "mst")) {
|
|
broadcast_mode = BMODE_MST;
|
|
} else if(!strcasecmp(bmode, "direct")) {
|
|
broadcast_mode = BMODE_DIRECT;
|
|
} else {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Invalid broadcast mode!");
|
|
return false;
|
|
}
|
|
|
|
free(bmode);
|
|
}
|
|
|
|
const char *const DEFAULT_BROADCAST_SUBNETS[] = { "ff:ff:ff:ff:ff:ff", "255.255.255.255", "224.0.0.0/4", "ff00::/8" };
|
|
|
|
for(size_t i = 0; i < sizeof(DEFAULT_BROADCAST_SUBNETS) / sizeof(*DEFAULT_BROADCAST_SUBNETS); i++) {
|
|
subnet_t *s = new_subnet();
|
|
|
|
if(!str2net(s, DEFAULT_BROADCAST_SUBNETS[i])) {
|
|
abort();
|
|
}
|
|
|
|
subnet_add(NULL, s);
|
|
}
|
|
|
|
for(config_t *cfg = lookup_config(config_tree, "BroadcastSubnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
|
|
subnet_t *s;
|
|
|
|
if(!get_config_subnet(cfg, &s)) {
|
|
continue;
|
|
}
|
|
|
|
subnet_add(NULL, s);
|
|
}
|
|
|
|
#if !defined(IP_TOS)
|
|
|
|
if(priorityinheritance) {
|
|
logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform for IPv4 connections", "PriorityInheritance");
|
|
}
|
|
|
|
#endif
|
|
|
|
#if !defined(IPV6_TCLASS)
|
|
|
|
if(priorityinheritance) {
|
|
logger(DEBUG_ALWAYS, LOG_WARNING, "%s not supported on this platform for IPv6 connections", "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;
|
|
}
|
|
|
|
if(!get_config_bool(lookup_config(config_tree, "AutoConnect"), &autoconnect)) {
|
|
autoconnect = true;
|
|
}
|
|
|
|
get_config_bool(lookup_config(config_tree, "DisableBuggyPeers"), &disablebuggypeers);
|
|
|
|
if(!get_config_int(lookup_config(config_tree, "InvitationExpire"), &invitation_lifetime)) {
|
|
invitation_lifetime = 604800; // 1 week
|
|
}
|
|
|
|
read_invitation_key();
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
Add listening sockets.
|
|
*/
|
|
static bool add_listen_address(char *address, bool bindto) {
|
|
char *port = myport;
|
|
|
|
if(address) {
|
|
char *space = strchr(address, ' ');
|
|
|
|
if(space) {
|
|
*space++ = 0;
|
|
port = space;
|
|
}
|
|
|
|
if(!strcmp(address, "*")) {
|
|
*address = 0;
|
|
}
|
|
}
|
|
|
|
struct addrinfo *ai, hint = {0};
|
|
|
|
hint.ai_family = addressfamily;
|
|
|
|
hint.ai_socktype = SOCK_STREAM;
|
|
|
|
hint.ai_protocol = IPPROTO_TCP;
|
|
|
|
hint.ai_flags = AI_PASSIVE;
|
|
|
|
#if HAVE_DECL_RES_INIT
|
|
res_init();
|
|
|
|
#endif
|
|
int 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", err == EAI_SYSTEM ? strerror(err) : gai_strerror(err));
|
|
return false;
|
|
}
|
|
|
|
for(struct addrinfo *aip = ai; aip; aip = aip->ai_next) {
|
|
// Ignore duplicate addresses
|
|
bool found = false;
|
|
|
|
for(int i = 0; i < listen_sockets; i++)
|
|
if(!memcmp(&listen_socket[i].sa, aip->ai_addr, aip->ai_addrlen)) {
|
|
found = true;
|
|
break;
|
|
}
|
|
|
|
if(found) {
|
|
continue;
|
|
}
|
|
|
|
if(listen_sockets >= MAXSOCKETS) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
|
|
return false;
|
|
}
|
|
|
|
int tcp_fd = setup_listen_socket((sockaddr_t *) aip->ai_addr);
|
|
|
|
if(tcp_fd < 0) {
|
|
continue;
|
|
}
|
|
|
|
int udp_fd = setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
|
|
|
|
if(udp_fd < 0) {
|
|
close(tcp_fd);
|
|
continue;
|
|
}
|
|
|
|
io_add(&listen_socket[listen_sockets].tcp, handle_new_meta_connection, &listen_socket[listen_sockets], tcp_fd, IO_READ);
|
|
io_add(&listen_socket[listen_sockets].udp, handle_incoming_vpn_data, &listen_socket[listen_sockets], udp_fd, IO_READ);
|
|
|
|
if(debug_level >= DEBUG_CONNECTIONS) {
|
|
char *hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
|
|
logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname);
|
|
free(hostname);
|
|
}
|
|
|
|
listen_socket[listen_sockets].bindto = bindto;
|
|
memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
|
|
listen_sockets++;
|
|
}
|
|
|
|
freeaddrinfo(ai);
|
|
return true;
|
|
}
|
|
|
|
void device_enable(void) {
|
|
if(devops.enable) {
|
|
devops.enable();
|
|
}
|
|
|
|
/* Run tinc-up script to further initialize the tap interface */
|
|
|
|
environment_t env;
|
|
environment_init(&env);
|
|
execute_script("tinc-up", &env);
|
|
environment_exit(&env);
|
|
}
|
|
|
|
void device_disable(void) {
|
|
environment_t env;
|
|
environment_init(&env);
|
|
execute_script("tinc-down", &env);
|
|
environment_exit(&env);
|
|
|
|
if(devops.disable) {
|
|
devops.disable();
|
|
}
|
|
}
|
|
|
|
/*
|
|
Configure node_t myself and set up the local sockets (listen only)
|
|
*/
|
|
static bool setup_myself(void) {
|
|
char *name, *hostname, *type;
|
|
char *address = NULL;
|
|
bool port_specified = false;
|
|
|
|
if(!(name = get_name())) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Name for tinc daemon required!");
|
|
return false;
|
|
}
|
|
|
|
myname = xstrdup(name);
|
|
myself = new_node();
|
|
myself->connection = new_connection();
|
|
myself->name = name;
|
|
myself->connection->name = xstrdup(name);
|
|
read_host_config(config_tree, name, true);
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "Port"), &myport)) {
|
|
myport = xstrdup("655");
|
|
} else {
|
|
port_specified = true;
|
|
}
|
|
|
|
myself->connection->options = 0;
|
|
myself->connection->protocol_major = PROT_MAJOR;
|
|
myself->connection->protocol_minor = PROT_MINOR;
|
|
|
|
myself->options |= PROT_MINOR << 24;
|
|
|
|
#ifdef DISABLE_LEGACY
|
|
experimental = read_ecdsa_private_key();
|
|
|
|
if(!experimental) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "No private key available, cannot start tinc!");
|
|
return false;
|
|
}
|
|
|
|
#else
|
|
|
|
if(!get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental)) {
|
|
experimental = read_ecdsa_private_key();
|
|
|
|
if(!experimental) {
|
|
logger(DEBUG_ALWAYS, LOG_WARNING, "Support for SPTPS disabled.");
|
|
}
|
|
} else {
|
|
if(experimental && !read_ecdsa_private_key()) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if(!read_rsa_private_key()) {
|
|
if(experimental) {
|
|
logger(DEBUG_ALWAYS, LOG_WARNING, "Support for legacy protocol disabled.");
|
|
} else {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "No private keys available, cannot start tinc!");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
/* 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);
|
|
freeaddrinfo(ai);
|
|
sockaddr2str(&sa, NULL, &myport);
|
|
}
|
|
|
|
/* Read in all the subnets specified in the host configuration file */
|
|
|
|
for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
|
|
subnet_t *subnet;
|
|
|
|
if(!get_config_subnet(cfg, &subnet)) {
|
|
return false;
|
|
}
|
|
|
|
subnet_add(myself, subnet);
|
|
}
|
|
|
|
/* 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, "MaxConnectionBurst"), &max_connection_burst)) {
|
|
if(max_connection_burst <= 0) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "MaxConnectionBurst cannot be negative!");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
get_config_int(lookup_config(config_tree, "FWMark"), &fwmark);
|
|
#ifndef SO_MARK
|
|
|
|
if(fwmark) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "FWMark not supported on this platform!");
|
|
return false;
|
|
}
|
|
|
|
#endif
|
|
|
|
int replaywin_int;
|
|
|
|
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;
|
|
sptps_replaywin = replaywin;
|
|
}
|
|
|
|
#ifndef DISABLE_LEGACY
|
|
/* Generate packet encryption key */
|
|
|
|
char *cipher;
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher)) {
|
|
cipher = xstrdup("aes-256-cbc");
|
|
}
|
|
|
|
if(!strcasecmp(cipher, "none")) {
|
|
myself->incipher = NULL;
|
|
} else if(!(myself->incipher = cipher_open_by_name(cipher))) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized cipher type!");
|
|
free(cipher);
|
|
return false;
|
|
}
|
|
|
|
free(cipher);
|
|
|
|
timeout_add(&keyexpire_timeout, keyexpire_handler, &keyexpire_timeout, &(struct timeval) {
|
|
keylifetime, rand() % 100000
|
|
});
|
|
|
|
/* 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;
|
|
}
|
|
|
|
char *digest;
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "Digest"), &digest)) {
|
|
digest = xstrdup("sha256");
|
|
}
|
|
|
|
if(!strcasecmp(digest, "none")) {
|
|
myself->indigest = NULL;
|
|
} else if(!(myself->indigest = digest_open_by_name(digest, maclength))) {
|
|
logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized digest type!");
|
|
free(digest);
|
|
return false;
|
|
}
|
|
|
|
free(digest);
|
|
#endif
|
|
|
|
/* 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->last_state_change = now.tv_sec;
|
|
myself->status.sptps = experimental;
|
|
node_add(myself);
|
|
|
|
graph();
|
|
|
|
load_all_nodes();
|
|
|
|
/* 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 HAVE_SYS_UN_H
|
|
else if(!strcasecmp(type, "fd")) {
|
|
devops = fd_devops;
|
|
}
|
|
|
|
#endif
|
|
#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);
|
|
}
|
|
|
|
get_config_bool(lookup_config(config_tree, "DeviceStandby"), &device_standby);
|
|
|
|
if(!devops.setup()) {
|
|
return false;
|
|
}
|
|
|
|
if(device_fd >= 0) {
|
|
io_add(&device_io, handle_device_data, NULL, device_fd, IO_READ);
|
|
}
|
|
|
|
/* 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(int 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(sockerrno));
|
|
return false;
|
|
}
|
|
|
|
#ifdef FD_CLOEXEC
|
|
fcntl(i + 3, F_SETFD, FD_CLOEXEC);
|
|
#endif
|
|
|
|
int udp_fd = setup_vpn_in_socket(&sa);
|
|
|
|
if(udp_fd < 0) {
|
|
return false;
|
|
}
|
|
|
|
io_add(&listen_socket[i].tcp, (io_cb_t)handle_new_meta_connection, &listen_socket[i], i + 3, IO_READ);
|
|
io_add(&listen_socket[i].udp, (io_cb_t)handle_incoming_vpn_data, &listen_socket[i], udp_fd, IO_READ);
|
|
|
|
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;
|
|
int cfgs = 0;
|
|
|
|
for(config_t *cfg = lookup_config(config_tree, "BindToAddress"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
|
|
cfgs++;
|
|
get_config_string(cfg, &address);
|
|
|
|
if(!add_listen_address(address, true)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
for(config_t *cfg = lookup_config(config_tree, "ListenAddress"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
|
|
cfgs++;
|
|
get_config_string(cfg, &address);
|
|
|
|
if(!add_listen_address(address, false)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if(!cfgs)
|
|
if(!add_listen_address(address, NULL)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if(!listen_sockets) {
|
|
logger(DEBUG_ALWAYS, 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 || atoi(myport) == 0) {
|
|
sockaddr_t sa;
|
|
socklen_t salen = sizeof(sa);
|
|
|
|
if(!getsockname(listen_socket[0].udp.fd, &sa.sa, &salen)) {
|
|
free(myport);
|
|
sockaddr2str(&sa, NULL, &myport);
|
|
|
|
if(!myport) {
|
|
myport = xstrdup("655");
|
|
}
|
|
}
|
|
}
|
|
|
|
xasprintf(&myself->hostname, "MYSELF port %s", myport);
|
|
myself->connection->hostname = xstrdup(myself->hostname);
|
|
|
|
char *upnp = NULL;
|
|
get_config_string(lookup_config(config_tree, "UPnP"), &upnp);
|
|
bool upnp_tcp = false;
|
|
bool upnp_udp = false;
|
|
|
|
if(upnp) {
|
|
if(!strcasecmp(upnp, "yes")) {
|
|
upnp_tcp = upnp_udp = true;
|
|
} else if(!strcasecmp(upnp, "udponly")) {
|
|
upnp_udp = true;
|
|
}
|
|
|
|
free(upnp);
|
|
}
|
|
|
|
if(upnp_tcp || upnp_udp) {
|
|
#ifdef HAVE_MINIUPNPC
|
|
upnp_init(upnp_tcp, upnp_udp);
|
|
#else
|
|
logger(DEBUG_ALWAYS, LOG_WARNING, "UPnP was requested, but tinc isn't built with miniupnpc support!");
|
|
#endif
|
|
}
|
|
|
|
/* Done. */
|
|
|
|
last_config_check = now.tv_sec;
|
|
|
|
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;
|
|
}
|
|
|
|
if(!init_control()) {
|
|
return false;
|
|
}
|
|
|
|
if(!device_standby) {
|
|
device_enable();
|
|
}
|
|
|
|
/* Run subnet-up scripts for our own subnets */
|
|
|
|
subnet_update(myself, NULL, true);
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
close all open network connections
|
|
*/
|
|
void close_network_connections(void) {
|
|
for(list_node_t *node = connection_list->head, *next; node; node = next) {
|
|
next = node->next;
|
|
connection_t *c = node->data;
|
|
|
|
/* Keep control connections open until the end, so they know when we really terminated */
|
|
if(c->status.control) {
|
|
c->socket = -1;
|
|
}
|
|
|
|
c->outgoing = NULL;
|
|
terminate_connection(c, false);
|
|
}
|
|
|
|
if(outgoing_list) {
|
|
list_delete_list(outgoing_list);
|
|
}
|
|
|
|
if(myself && myself->connection) {
|
|
subnet_update(myself, NULL, false);
|
|
connection_del(myself->connection);
|
|
}
|
|
|
|
for(int i = 0; i < listen_sockets; i++) {
|
|
io_del(&listen_socket[i].tcp);
|
|
io_del(&listen_socket[i].udp);
|
|
close(listen_socket[i].tcp.fd);
|
|
close(listen_socket[i].udp.fd);
|
|
}
|
|
|
|
exit_requests();
|
|
exit_edges();
|
|
exit_subnets();
|
|
exit_nodes();
|
|
exit_connections();
|
|
|
|
if(!device_standby) {
|
|
device_disable();
|
|
}
|
|
|
|
free(myport);
|
|
|
|
if(device_fd >= 0) {
|
|
io_del(&device_io);
|
|
}
|
|
|
|
if(devops.close) {
|
|
devops.close();
|
|
}
|
|
|
|
exit_control();
|
|
|
|
free(scriptextension);
|
|
free(scriptinterpreter);
|
|
|
|
return;
|
|
}
|