809 lines
20 KiB
C
809 lines
20 KiB
C
/*
|
|
net_setup.c -- Setup.
|
|
Copyright (C) 1998-2005 Ivo Timmermans,
|
|
2000-2012 Guus Sliepen <guus@tinc-vpn.org>
|
|
2006 Scott Lamb <slamb@slamb.org>
|
|
2010 Brandon Black <blblack@gmail.com>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along
|
|
with this program; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "system.h"
|
|
|
|
#include "splay_tree.h"
|
|
#include "cipher.h"
|
|
#include "conf.h"
|
|
#include "connection.h"
|
|
#include "control.h"
|
|
#include "device.h"
|
|
#include "digest.h"
|
|
#include "ecdsa.h"
|
|
#include "graph.h"
|
|
#include "logger.h"
|
|
#include "net.h"
|
|
#include "netutl.h"
|
|
#include "process.h"
|
|
#include "protocol.h"
|
|
#include "route.h"
|
|
#include "rsa.h"
|
|
#include "subnet.h"
|
|
#include "utils.h"
|
|
#include "xalloc.h"
|
|
|
|
char *myport;
|
|
static struct event device_ev;
|
|
devops_t devops;
|
|
|
|
bool node_read_ecdsa_public_key(node_t *n) {
|
|
if(ecdsa_active(&n->ecdsa))
|
|
return true;
|
|
|
|
splay_tree_t *config_tree;
|
|
FILE *fp;
|
|
char *fname;
|
|
char *p;
|
|
bool result = false;
|
|
|
|
xasprintf(&fname, "%s/hosts/%s", confbase, n->name);
|
|
|
|
init_configuration(&config_tree);
|
|
if(!read_config_file(config_tree, fname))
|
|
goto exit;
|
|
|
|
/* First, check for simple ECDSAPublicKey statement */
|
|
|
|
if(get_config_string(lookup_config(config_tree, "ECDSAPublicKey"), &p)) {
|
|
result = ecdsa_set_base64_public_key(&n->ecdsa, p);
|
|
free(p);
|
|
goto exit;
|
|
}
|
|
|
|
/* Else, check for ECDSAPublicKeyFile statement and read it */
|
|
|
|
free(fname);
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "ECDSAPublicKeyFile"), &fname))
|
|
xasprintf(&fname, "%s/hosts/%s", confbase, n->name);
|
|
|
|
fp = fopen(fname, "r");
|
|
|
|
if(!fp) {
|
|
logger(LOG_ERR, "Error reading ECDSA public key file `%s': %s", fname, strerror(errno));
|
|
goto exit;
|
|
}
|
|
|
|
result = ecdsa_read_pem_public_key(&n->ecdsa, fp);
|
|
fclose(fp);
|
|
|
|
exit:
|
|
exit_configuration(&config_tree);
|
|
free(fname);
|
|
return result;
|
|
}
|
|
|
|
bool read_ecdsa_public_key(connection_t *c) {
|
|
FILE *fp;
|
|
char *fname;
|
|
char *p;
|
|
bool result;
|
|
|
|
/* First, check for simple ECDSAPublicKey statement */
|
|
|
|
if(get_config_string(lookup_config(c->config_tree, "ECDSAPublicKey"), &p)) {
|
|
result = ecdsa_set_base64_public_key(&c->ecdsa, p);
|
|
free(p);
|
|
return result;
|
|
}
|
|
|
|
/* Else, check for ECDSAPublicKeyFile statement and read it */
|
|
|
|
if(!get_config_string(lookup_config(c->config_tree, "ECDSAPublicKeyFile"), &fname))
|
|
xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
|
|
|
|
fp = fopen(fname, "r");
|
|
|
|
if(!fp) {
|
|
logger(LOG_ERR, "Error reading ECDSA public key file `%s': %s",
|
|
fname, strerror(errno));
|
|
free(fname);
|
|
return false;
|
|
}
|
|
|
|
result = ecdsa_read_pem_public_key(&c->ecdsa, fp);
|
|
fclose(fp);
|
|
|
|
if(!result)
|
|
logger(LOG_ERR, "Reading ECDSA public key file `%s' failed: %s", fname, strerror(errno));
|
|
free(fname);
|
|
return result;
|
|
}
|
|
|
|
bool read_rsa_public_key(connection_t *c) {
|
|
FILE *fp;
|
|
char *fname;
|
|
char *n;
|
|
bool result;
|
|
|
|
/* First, check for simple PublicKey statement */
|
|
|
|
if(get_config_string(lookup_config(c->config_tree, "PublicKey"), &n)) {
|
|
result = rsa_set_hex_public_key(&c->rsa, n, "FFFF");
|
|
free(n);
|
|
return result;
|
|
}
|
|
|
|
/* Else, check for PublicKeyFile statement and read it */
|
|
|
|
if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
|
|
xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
|
|
|
|
fp = fopen(fname, "r");
|
|
|
|
if(!fp) {
|
|
logger(LOG_ERR, "Error reading RSA public key file `%s': %s", fname, strerror(errno));
|
|
free(fname);
|
|
return false;
|
|
}
|
|
|
|
result = rsa_read_pem_public_key(&c->rsa, fp);
|
|
fclose(fp);
|
|
|
|
if(!result)
|
|
logger(LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno));
|
|
free(fname);
|
|
return result;
|
|
}
|
|
|
|
static bool read_ecdsa_private_key(void) {
|
|
FILE *fp;
|
|
char *fname;
|
|
bool result;
|
|
|
|
/* Check for PrivateKeyFile statement and read it */
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "ECDSAPrivateKeyFile"), &fname))
|
|
xasprintf(&fname, "%s/ecdsa_key.priv", confbase);
|
|
|
|
fp = fopen(fname, "r");
|
|
|
|
if(!fp) {
|
|
logger(LOG_ERR, "Error reading ECDSA private key file `%s': %s", fname, strerror(errno));
|
|
free(fname);
|
|
return false;
|
|
}
|
|
|
|
#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
|
|
struct stat s;
|
|
|
|
if(fstat(fileno(fp), &s)) {
|
|
logger(LOG_ERR, "Could not stat ECDSA private key file `%s': %s'", fname, strerror(errno));
|
|
free(fname);
|
|
return false;
|
|
}
|
|
|
|
if(s.st_mode & ~0100700)
|
|
logger(LOG_WARNING, "Warning: insecure file permissions for ECDSA private key file `%s'!", fname);
|
|
#endif
|
|
|
|
result = ecdsa_read_pem_private_key(&myself->connection->ecdsa, fp);
|
|
fclose(fp);
|
|
|
|
if(!result)
|
|
logger(LOG_ERR, "Reading ECDSA private key file `%s' failed: %s", fname, strerror(errno));
|
|
free(fname);
|
|
return result;
|
|
}
|
|
|
|
static bool read_rsa_private_key(void) {
|
|
FILE *fp;
|
|
char *fname;
|
|
char *n, *d;
|
|
bool result;
|
|
|
|
/* First, check for simple PrivateKey statement */
|
|
|
|
if(get_config_string(lookup_config(config_tree, "PrivateKey"), &d)) {
|
|
if(!get_config_string(lookup_config(config_tree, "PublicKey"), &n)) {
|
|
logger(LOG_ERR, "PrivateKey used but no PublicKey found!");
|
|
free(d);
|
|
return false;
|
|
}
|
|
result = rsa_set_hex_private_key(&myself->connection->rsa, n, "FFFF", d);
|
|
free(n);
|
|
free(d);
|
|
return true;
|
|
}
|
|
|
|
/* Else, check for PrivateKeyFile statement and read it */
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "PrivateKeyFile"), &fname))
|
|
xasprintf(&fname, "%s/rsa_key.priv", confbase);
|
|
|
|
fp = fopen(fname, "r");
|
|
|
|
if(!fp) {
|
|
logger(LOG_ERR, "Error reading RSA private key file `%s': %s",
|
|
fname, strerror(errno));
|
|
free(fname);
|
|
return false;
|
|
}
|
|
|
|
#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
|
|
struct stat s;
|
|
|
|
if(fstat(fileno(fp), &s)) {
|
|
logger(LOG_ERR, "Could not stat RSA private key file `%s': %s'", fname, strerror(errno));
|
|
free(fname);
|
|
return false;
|
|
}
|
|
|
|
if(s.st_mode & ~0100700)
|
|
logger(LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
|
|
#endif
|
|
|
|
result = rsa_read_pem_private_key(&myself->connection->rsa, fp);
|
|
fclose(fp);
|
|
|
|
if(!result)
|
|
logger(LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno));
|
|
free(fname);
|
|
return result;
|
|
}
|
|
|
|
static struct event keyexpire_event;
|
|
|
|
static void keyexpire_handler(int fd, short events, void *data) {
|
|
regenerate_key();
|
|
}
|
|
|
|
void regenerate_key(void) {
|
|
if(timeout_initialized(&keyexpire_event)) {
|
|
ifdebug(STATUS) logger(LOG_INFO, "Expiring symmetric keys");
|
|
event_del(&keyexpire_event);
|
|
send_key_changed();
|
|
} else {
|
|
timeout_set(&keyexpire_event, keyexpire_handler, NULL);
|
|
}
|
|
|
|
event_add(&keyexpire_event, &(struct timeval){keylifetime, 0});
|
|
}
|
|
|
|
/*
|
|
Read Subnets from all host config files
|
|
*/
|
|
void load_all_subnets(void) {
|
|
DIR *dir;
|
|
struct dirent *ent;
|
|
char *dname;
|
|
char *fname;
|
|
splay_tree_t *config_tree;
|
|
config_t *cfg;
|
|
subnet_t *s, *s2;
|
|
node_t *n;
|
|
bool result;
|
|
|
|
xasprintf(&dname, "%s/hosts", confbase);
|
|
dir = opendir(dname);
|
|
if(!dir) {
|
|
logger(LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
|
|
free(dname);
|
|
return;
|
|
}
|
|
|
|
while((ent = readdir(dir))) {
|
|
if(!check_id(ent->d_name))
|
|
continue;
|
|
|
|
n = lookup_node(ent->d_name);
|
|
#ifdef _DIRENT_HAVE_D_TYPE
|
|
//if(ent->d_type != DT_REG)
|
|
// continue;
|
|
#endif
|
|
|
|
xasprintf(&fname, "%s/hosts/%s", confbase, ent->d_name);
|
|
init_configuration(&config_tree);
|
|
result = read_config_file(config_tree, fname);
|
|
free(fname);
|
|
if(!result)
|
|
continue;
|
|
|
|
if(!n) {
|
|
n = new_node();
|
|
n->name = xstrdup(ent->d_name);
|
|
node_add(n);
|
|
}
|
|
|
|
for(cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
|
|
if(!get_config_subnet(cfg, &s))
|
|
continue;
|
|
|
|
if((s2 = lookup_subnet(n, s))) {
|
|
s2->expires = -1;
|
|
} else {
|
|
subnet_add(n, s);
|
|
}
|
|
}
|
|
|
|
exit_configuration(&config_tree);
|
|
}
|
|
|
|
closedir(dir);
|
|
}
|
|
|
|
/*
|
|
Configure node_t myself and set up the local sockets (listen only)
|
|
*/
|
|
static bool setup_myself(void) {
|
|
config_t *cfg;
|
|
subnet_t *subnet;
|
|
char *name, *hostname, *mode, *afname, *cipher, *digest, *type;
|
|
char *fname = NULL;
|
|
char *address = NULL;
|
|
char *envp[5];
|
|
struct addrinfo *ai, *aip, hint = {0};
|
|
bool choice;
|
|
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;
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "Name"), &name)) { /* Not acceptable */
|
|
logger(LOG_ERR, "Name for tinc daemon required!");
|
|
return false;
|
|
}
|
|
|
|
if(!check_id(name)) {
|
|
logger(LOG_ERR, "Invalid name for myself!");
|
|
free(name);
|
|
return false;
|
|
}
|
|
|
|
myself->name = name;
|
|
myself->connection->name = xstrdup(name);
|
|
xasprintf(&fname, "%s/hosts/%s", confbase, name);
|
|
read_config_options(config_tree, name);
|
|
read_config_file(config_tree, fname);
|
|
free(fname);
|
|
|
|
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(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice)
|
|
myself->options |= OPTION_INDIRECT;
|
|
|
|
if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice)
|
|
myself->options |= OPTION_TCPONLY;
|
|
|
|
if(myself->options & OPTION_TCPONLY)
|
|
myself->options |= OPTION_INDIRECT;
|
|
|
|
get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
|
|
get_config_bool(lookup_config(config_tree, "StrictSubnets"), &strictsubnets);
|
|
get_config_bool(lookup_config(config_tree, "TunnelServer"), &tunnelserver);
|
|
get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
|
|
strictsubnets |= tunnelserver;
|
|
|
|
if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
|
|
if(!strcasecmp(mode, "router"))
|
|
routing_mode = RMODE_ROUTER;
|
|
else if(!strcasecmp(mode, "switch"))
|
|
routing_mode = RMODE_SWITCH;
|
|
else if(!strcasecmp(mode, "hub"))
|
|
routing_mode = RMODE_HUB;
|
|
else {
|
|
logger(LOG_ERR, "Invalid routing mode!");
|
|
return false;
|
|
}
|
|
free(mode);
|
|
}
|
|
|
|
if(get_config_string(lookup_config(config_tree, "Forwarding"), &mode)) {
|
|
if(!strcasecmp(mode, "off"))
|
|
forwarding_mode = FMODE_OFF;
|
|
else if(!strcasecmp(mode, "internal"))
|
|
forwarding_mode = FMODE_INTERNAL;
|
|
else if(!strcasecmp(mode, "kernel"))
|
|
forwarding_mode = FMODE_KERNEL;
|
|
else {
|
|
logger(LOG_ERR, "Invalid forwarding mode!");
|
|
return false;
|
|
}
|
|
free(mode);
|
|
}
|
|
|
|
choice = true;
|
|
get_config_bool(lookup_config(config_tree, "PMTUDiscovery"), &choice);
|
|
if(choice)
|
|
myself->options |= OPTION_PMTU_DISCOVERY;
|
|
|
|
choice = true;
|
|
get_config_bool(lookup_config(config_tree, "ClampMSS"), &choice);
|
|
if(choice)
|
|
myself->options |= OPTION_CLAMP_MSS;
|
|
|
|
get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);
|
|
get_config_bool(lookup_config(config_tree, "DecrementTTL"), &decrement_ttl);
|
|
get_config_bool(lookup_config(config_tree, "Broadcast"), &broadcast);
|
|
|
|
#if !defined(SOL_IP) || !defined(IP_TOS)
|
|
if(priorityinheritance)
|
|
logger(LOG_WARNING, "%s not supported on this platform", "PriorityInheritance");
|
|
#endif
|
|
|
|
if(!get_config_int(lookup_config(config_tree, "MACExpire"), &macexpire))
|
|
macexpire = 600;
|
|
|
|
if(get_config_int(lookup_config(config_tree, "MaxTimeout"), &maxtimeout)) {
|
|
if(maxtimeout <= 0) {
|
|
logger(LOG_ERR, "Bogus maximum timeout!");
|
|
return false;
|
|
}
|
|
} else
|
|
maxtimeout = 900;
|
|
|
|
if(get_config_int(lookup_config(config_tree, "UDPRcvBuf"), &udp_rcvbuf)) {
|
|
if(udp_rcvbuf <= 0) {
|
|
logger(LOG_ERR, "UDPRcvBuf cannot be negative!");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if(get_config_int(lookup_config(config_tree, "UDPSndBuf"), &udp_sndbuf)) {
|
|
if(udp_sndbuf <= 0) {
|
|
logger(LOG_ERR, "UDPSndBuf cannot be negative!");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
|
|
if(replaywin_int < 0) {
|
|
logger(LOG_ERR, "ReplayWindow cannot be negative!");
|
|
return false;
|
|
}
|
|
replaywin = (unsigned)replaywin_int;
|
|
}
|
|
|
|
if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
|
|
if(!strcasecmp(afname, "IPv4"))
|
|
addressfamily = AF_INET;
|
|
else if(!strcasecmp(afname, "IPv6"))
|
|
addressfamily = AF_INET6;
|
|
else if(!strcasecmp(afname, "any"))
|
|
addressfamily = AF_UNSPEC;
|
|
else {
|
|
logger(LOG_ERR, "Invalid address family!");
|
|
return false;
|
|
}
|
|
free(afname);
|
|
}
|
|
|
|
get_config_bool(lookup_config(config_tree, "Hostnames"), &hostnames);
|
|
|
|
/* Generate packet encryption key */
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher))
|
|
cipher = xstrdup("blowfish");
|
|
|
|
if(!cipher_open_by_name(&myself->incipher, cipher)) {
|
|
logger(LOG_ERR, "Unrecognized cipher type!");
|
|
return false;
|
|
}
|
|
|
|
if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
|
|
keylifetime = 3600;
|
|
|
|
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(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(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(LOG_ERR, "Bogus compression level!");
|
|
return false;
|
|
}
|
|
} else
|
|
myself->incompression = 0;
|
|
|
|
myself->connection->outcompression = 0;
|
|
|
|
/* Done */
|
|
|
|
myself->nexthop = myself;
|
|
myself->via = myself;
|
|
myself->status.reachable = true;
|
|
node_add(myself);
|
|
|
|
graph();
|
|
|
|
if(strictsubnets)
|
|
load_all_subnets();
|
|
|
|
/* Open device */
|
|
|
|
devops = os_devops;
|
|
|
|
if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) {
|
|
if(!strcasecmp(type, "dummy"))
|
|
devops = dummy_devops;
|
|
else if(!strcasecmp(type, "raw_socket"))
|
|
devops = raw_socket_devops;
|
|
#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(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 */
|
|
|
|
listen_sockets = 0;
|
|
cfg = lookup_config(config_tree, "BindToAddress");
|
|
|
|
do {
|
|
get_config_string(cfg, &address);
|
|
if(cfg)
|
|
cfg = lookup_config_next(config_tree, cfg);
|
|
|
|
hint.ai_family = addressfamily;
|
|
hint.ai_socktype = SOCK_STREAM;
|
|
hint.ai_protocol = IPPROTO_TCP;
|
|
hint.ai_flags = AI_PASSIVE;
|
|
|
|
err = getaddrinfo(address, myport, &hint, &ai);
|
|
free(address);
|
|
|
|
if(err || !ai) {
|
|
logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
|
|
gai_strerror(err));
|
|
return false;
|
|
}
|
|
|
|
for(aip = ai; aip; aip = aip->ai_next) {
|
|
if(listen_sockets >= MAXSOCKETS) {
|
|
logger(LOG_ERR, "Too many listening sockets");
|
|
return false;
|
|
}
|
|
|
|
listen_socket[listen_sockets].tcp =
|
|
setup_listen_socket((sockaddr_t *) aip->ai_addr);
|
|
|
|
if(listen_socket[listen_sockets].tcp < 0)
|
|
continue;
|
|
|
|
listen_socket[listen_sockets].udp =
|
|
setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
|
|
|
|
if(listen_socket[listen_sockets].udp < 0) {
|
|
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(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(LOG_ERR, "event_add failed: %s", strerror(errno));
|
|
abort();
|
|
}
|
|
|
|
ifdebug(CONNECTIONS) {
|
|
hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
|
|
logger(LOG_NOTICE, "Listening on %s", hostname);
|
|
free(hostname);
|
|
}
|
|
|
|
memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
|
|
listen_sockets++;
|
|
}
|
|
|
|
freeaddrinfo(ai);
|
|
} while(cfg);
|
|
|
|
if(listen_sockets)
|
|
logger(LOG_NOTICE, "Ready");
|
|
else {
|
|
logger(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;
|
|
}
|