/*
net_setup.c -- Setup.
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2021 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
#include "system.h"
-#include "splay_tree.h"
#include "cipher.h"
+#include "conf_net.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 "names.h"
#include "net.h"
#include "netutl.h"
#include "process.h"
#include "protocol.h"
#include "route.h"
-#include "rsa.h"
+#include "script.h"
#include "subnet.h"
#include "utils.h"
#include "xalloc.h"
+#include "keys.h"
+
+#ifdef HAVE_MINIUPNPC
+#include "upnp.h"
+#endif
char *myport;
-static struct event device_ev;
+static io_t device_io;
+devops_t devops;
+bool device_standby = false;
+
+char *proxyhost = NULL;
+char *proxyport = NULL;
+char *proxyuser = NULL;
+char *proxypass = NULL;
+
+proxytype_t proxytype;
+bool autoconnect;
+bool disablebuggypeers;
+
+char *scriptinterpreter;
+char *scriptextension;
+
+bool node_read_ecdsa_public_key(node_t *n) {
+ if(ecdsa_active(n->ecdsa)) {
+ return true;
+ }
-bool read_rsa_public_key(connection_t *c) {
+ splay_tree_t *config_tree;
FILE *fp;
- char *fname;
- char *n;
- bool result;
+ char *pubname = NULL;
+ char *p;
- /* First, check for simple PublicKey statement */
+ init_configuration(&config_tree);
- 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;
+ if(!read_host_config(config_tree, n->name, true)) {
+ goto exit;
}
- /* Else, check for PublicKeyFile statement and read it */
+ /* First, check for simple Ed25519PublicKey statement */
- if(!get_config_string(lookup_config(c->config_tree, "PublicKeyFile"), &fname))
- xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
+ if(get_config_string(lookup_config(config_tree, "Ed25519PublicKey"), &p)) {
+ n->ecdsa = ecdsa_set_base64_public_key(p);
+ free(p);
+ goto exit;
+ }
- fp = fopen(fname, "r");
+ /* Else, check for Ed25519PublicKeyFile statement and read it */
+
+ if(!get_config_string(lookup_config(config_tree, "Ed25519PublicKeyFile"), &pubname)) {
+ xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, n->name);
+ }
+
+ fp = fopen(pubname, "r");
if(!fp) {
- logger(LOG_ERR, "Error reading RSA public key file `%s': %s",
- fname, strerror(errno));
- free(fname);
- return false;
+ goto exit;
}
- result = rsa_read_pem_public_key(&c->rsa, fp);
+ n->ecdsa = ecdsa_read_pem_public_key(fp);
fclose(fp);
- if(!result)
- logger(LOG_ERR, "Reading RSA public key file `%s' failed: %s", fname, strerror(errno));
- free(fname);
- return result;
+exit:
+ exit_configuration(&config_tree);
+ free(pubname);
+ return n->ecdsa;
}
-bool read_rsa_private_key() {
+static bool read_invitation_key(void) {
FILE *fp;
- char *fname;
- char *n, *d;
- bool result;
+ char fname[PATH_MAX];
- /* First, check for simple PrivateKey statement */
-
- if(get_config_string(lookup_config(config_tree, "PrivateKey"), &d)) {
- if(!get_config_string(lookup_config(myself->connection->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;
+ if(invitation_key) {
+ ecdsa_free(invitation_key);
+ invitation_key = NULL;
}
- /* 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);
+ snprintf(fname, sizeof(fname), "%s" SLASH "invitations" SLASH "ed25519_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(fp) {
+ invitation_key = ecdsa_read_pem_private_key(fp);
+ fclose(fp);
+
+ if(!invitation_key) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Reading Ed25519 private key file `%s' failed", fname);
+ }
}
-#if !defined(HAVE_MINGW) && !defined(HAVE_CYGWIN)
- struct stat s;
+ return invitation_key;
+}
- if(fstat(fileno(fp), &s)) {
- logger(LOG_ERR, "Could not stat RSA private key file `%s': %s'", fname, strerror(errno));
- free(fname);
- return false;
- }
+#ifndef DISABLE_LEGACY
+static timeout_t keyexpire_timeout;
- if(s.st_mode & ~0100700)
- logger(LOG_WARNING, "Warning: insecure file permissions for RSA private key file `%s'!", fname);
+static void keyexpire_handler(void *data) {
+ regenerate_key();
+ timeout_set(data, &(struct timeval) {
+ keylifetime, rand() % 100000
+ });
+}
#endif
- result = rsa_read_pem_private_key(&myself->connection->rsa, fp);
- fclose(fp);
+void regenerate_key(void) {
+ logger(DEBUG_STATUS, LOG_INFO, "Expiring symmetric keys");
+ send_key_changed();
- if(!result)
- logger(LOG_ERR, "Reading RSA private key file `%s' failed: %s", fname, strerror(errno));
- free(fname);
- return result;
+ for splay_each(node_t, n, node_tree) {
+ n->status.validkey_in = false;
+ }
}
-static struct event keyexpire_event;
+void load_all_nodes(void) {
+ DIR *dir;
+ struct dirent *ent;
+ char dname[PATH_MAX];
-static void keyexpire_handler(int fd, short events, void *data) {
- regenerate_key();
-}
+ snprintf(dname, sizeof(dname), "%s" SLASH "hosts", confbase);
+ dir = opendir(dname);
-void regenerate_key() {
- if(timeout_initialized(&keyexpire_event)) {
- ifdebug(STATUS) logger(LOG_INFO, "Expiring symmetric keys");
- event_del(&keyexpire_event);
- send_key_changed(broadcast, myself);
- } else {
- timeout_set(&keyexpire_event, keyexpire_handler, NULL);
+ if(!dir) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
+ return;
}
- event_add(&keyexpire_event, &(struct timeval){keylifetime, 0});
-}
+ while((ent = readdir(dir))) {
+ if(!check_id(ent->d_name)) {
+ continue;
+ }
-/*
- Configure node_t myself and set up the local sockets (listen only)
-*/
-bool setup_myself(void) {
- config_t *cfg;
- subnet_t *subnet;
- char *name, *hostname, *mode, *afname, *cipher, *digest;
- char *address = NULL;
- char *envp[5];
- struct addrinfo *ai, *aip, hint = {0};
- bool choice;
- int i, err;
+ node_t *n = lookup_node(ent->d_name);
- myself = new_node();
- myself->connection = new_connection();
- init_configuration(&myself->connection->config_tree);
+ splay_tree_t *config_tree;
+ init_configuration(&config_tree);
+ read_config_options(config_tree, ent->d_name);
+ read_host_config(config_tree, ent->d_name, true);
- xasprintf(&myself->hostname, "MYSELF");
- xasprintf(&myself->connection->hostname, "MYSELF");
+ if(!n) {
+ n = new_node();
+ n->name = xstrdup(ent->d_name);
+ node_add(n);
+ }
- myself->connection->options = 0;
- myself->connection->protocol_version = PROT_CURRENT;
+ if(strictsubnets) {
+ for(config_t *cfg = lookup_config(config_tree, "Subnet"); cfg; cfg = lookup_config_next(config_tree, cfg)) {
+ subnet_t *s, *s2;
+
+ if(!get_config_subnet(cfg, &s)) {
+ continue;
+ }
+
+ if((s2 = lookup_subnet(n, s))) {
+ s2->expires = -1;
+ free(s);
+ } else {
+ subnet_add(n, s);
+ }
+ }
+ }
- if(!get_config_string(lookup_config(config_tree, "Name"), &name)) { /* Not acceptable */
- logger(LOG_ERR, "Name for tinc daemon required!");
- return false;
+ if(lookup_config(config_tree, "Address")) {
+ n->status.has_address = true;
+ }
+
+ exit_configuration(&config_tree);
}
- if(!check_id(name)) {
- logger(LOG_ERR, "Invalid name for myself!");
- free(name);
- return false;
+ closedir(dir);
+}
+
+char *get_name(void) {
+ char *name = NULL;
+ char *returned_name;
+
+ get_config_string(lookup_config(config_tree, "Name"), &name);
+
+ if(!name) {
+ return NULL;
}
- myself->name = name;
- myself->connection->name = xstrdup(name);
+ returned_name = replace_name(name);
+ free(name);
+ return returned_name;
+}
- if(!read_connection_config(myself->connection)) {
- logger(LOG_ERR, "Cannot open host configuration file for myself!");
- return false;
+bool setup_myself_reloadable(void) {
+ free(scriptinterpreter);
+ scriptinterpreter = NULL;
+
+ get_config_string(lookup_config(config_tree, "ScriptsInterpreter"), &scriptinterpreter);
+
+ free(scriptextension);
+
+ if(!get_config_string(lookup_config(config_tree, "ScriptsExtension"), &scriptextension)) {
+ scriptextension = xstrdup("");
}
- if(!read_rsa_private_key())
- return false;
+ char *proxy = NULL;
- if(!get_config_string(lookup_config(myself->connection->config_tree, "Port"), &myport))
- xasprintf(&myport, "655");
+ get_config_string(lookup_config(config_tree, "Proxy"), &proxy);
- /* Read in all the subnets specified in the host configuration file */
+ if(proxy) {
+ char *space;
- cfg = lookup_config(myself->connection->config_tree, "Subnet");
+ if((space = strchr(proxy, ' '))) {
+ *space++ = 0;
+ }
- while(cfg) {
- if(!get_config_subnet(cfg, &subnet))
+ if(!strcasecmp(proxy, "none")) {
+ proxytype = PROXY_NONE;
+ } else if(!strcasecmp(proxy, "socks4")) {
+ proxytype = PROXY_SOCKS4;
+ } else if(!strcasecmp(proxy, "socks4a")) {
+ proxytype = PROXY_SOCKS4A;
+ } else if(!strcasecmp(proxy, "socks5")) {
+ proxytype = PROXY_SOCKS5;
+ } else if(!strcasecmp(proxy, "http")) {
+ proxytype = PROXY_HTTP;
+ } else if(!strcasecmp(proxy, "exec")) {
+ proxytype = PROXY_EXEC;
+ } else {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Unknown proxy type %s!", proxy);
+ free(proxy);
return false;
+ }
- subnet_add(myself, subnet);
+ free(proxyhost);
+ proxyhost = NULL;
+
+ free(proxyport);
+ proxyport = NULL;
+
+ free(proxyuser);
+ proxyuser = NULL;
+
+ free(proxypass);
+ proxypass = NULL;
+
+ switch(proxytype) {
+ case PROXY_NONE:
+ default:
+ break;
+
+ case PROXY_EXEC:
+ if(!space || !*space) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Argument expected for proxy type exec!");
+ free(proxy);
+ return false;
+ }
+
+ proxyhost = xstrdup(space);
+ break;
+
+ case PROXY_SOCKS4:
+ case PROXY_SOCKS4A:
+ case PROXY_SOCKS5:
+ case PROXY_HTTP:
+ proxyhost = space;
+
+ if(space && (space = strchr(space, ' '))) {
+ *space++ = 0, proxyport = space;
+ }
+
+ if(!proxyhost || !*proxyhost || !proxyport || !*proxyport) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Host and port argument expected for proxy!");
+ proxyport = NULL;
+ proxyhost = NULL;
+ free(proxy);
+ return false;
+ }
+
+ if(space && (space = strchr(space, ' '))) {
+ *space++ = 0, proxyuser = space;
+ }
+
+ if(space && (space = strchr(space, ' '))) {
+ *space++ = 0, proxypass = space;
+ }
- cfg = lookup_config_next(myself->connection->config_tree, cfg);
+ proxyhost = xstrdup(proxyhost);
+ proxyport = xstrdup(proxyport);
+
+ if(proxyuser && *proxyuser) {
+ proxyuser = xstrdup(proxyuser);
+ }
+
+ if(proxypass && *proxypass) {
+ proxypass = xstrdup(proxypass);
+ }
+
+ break;
+ }
+
+ free(proxy);
}
- /* Check some options */
+ bool choice;
- if(get_config_bool(lookup_config(config_tree, "IndirectData"), &choice) && choice)
+ 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)
+ if(get_config_bool(lookup_config(config_tree, "TCPOnly"), &choice) && choice) {
myself->options |= OPTION_TCPONLY;
+ }
- if(get_config_bool(lookup_config(myself->connection->config_tree, "IndirectData"), &choice) && choice)
+ if(myself->options & OPTION_TCPONLY) {
myself->options |= OPTION_INDIRECT;
+ }
- if(get_config_bool(lookup_config(myself->connection->config_tree, "TCPOnly"), &choice) && choice)
- myself->options |= OPTION_TCPONLY;
+ 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);
- if(myself->options & OPTION_TCPONLY)
- myself->options |= OPTION_INDIRECT;
+ 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, "TunnelServer"), &tunnelserver);
+ get_config_bool(lookup_config(config_tree, "DirectOnly"), &directonly);
+ get_config_bool(lookup_config(config_tree, "LocalDiscovery"), &localdiscovery);
+
+ char *rmode = NULL;
- if(get_config_string(lookup_config(config_tree, "Mode"), &mode)) {
- if(!strcasecmp(mode, "router"))
+ if(get_config_string(lookup_config(config_tree, "Mode"), &rmode)) {
+ if(!strcasecmp(rmode, "router")) {
routing_mode = RMODE_ROUTER;
- else if(!strcasecmp(mode, "switch"))
+ } else if(!strcasecmp(rmode, "switch")) {
routing_mode = RMODE_SWITCH;
- else if(!strcasecmp(mode, "hub"))
+ } else if(!strcasecmp(rmode, "hub")) {
routing_mode = RMODE_HUB;
- else {
- logger(LOG_ERR, "Invalid routing mode!");
+ } else {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Invalid routing mode!");
+ free(rmode);
return false;
}
- free(mode);
- } else
- routing_mode = RMODE_ROUTER;
- // Enable PMTUDiscovery by default if we are in router mode.
+ free(rmode);
+ }
- choice = routing_mode == RMODE_ROUTER;
- get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice);
- if(choice)
+ char *fmode = NULL;
+
+ 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!");
+ free(fmode);
+ 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);
+
+ char *bmode = NULL;
+
+ 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!");
+ free(bmode);
+ return false;
+ }
+
+ free(bmode);
+ }
+
+ /* Delete all broadcast subnets before re-adding them */
+
+ for splay_each(subnet_t, s, subnet_tree) {
+ if(!s->owner) {
+ splay_delete_node(subnet_tree, node);
+ }
+ }
+
+ 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");
+ }
-#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))
+ 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!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus maximum timeout!");
return false;
}
- } else
+ } else {
maxtimeout = 900;
+ }
+
+ char *afname = NULL;
if(get_config_string(lookup_config(config_tree, "AddressFamily"), &afname)) {
- if(!strcasecmp(afname, "IPv4"))
+ if(!strcasecmp(afname, "IPv4")) {
addressfamily = AF_INET;
- else if(!strcasecmp(afname, "IPv6"))
+ } else if(!strcasecmp(afname, "IPv6")) {
addressfamily = AF_INET6;
- else if(!strcasecmp(afname, "any"))
+ } else if(!strcasecmp(afname, "any")) {
addressfamily = AF_UNSPEC;
- else {
- logger(LOG_ERR, "Invalid address family!");
+ } else {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Invalid address family!");
+ free(afname);
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");
+ freeaddrinfo(ai);
+ 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
+ myself->connection->ecdsa = read_ecdsa_private_key(config_tree, NULL);
+ experimental = myself->connection->ecdsa != NULL;
+
+ 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)) {
+ myself->connection->ecdsa = read_ecdsa_private_key(config_tree, NULL);
+ experimental = myself->connection->ecdsa != NULL;
+
+ if(!experimental) {
+ logger(DEBUG_ALWAYS, LOG_WARNING, "Support for SPTPS disabled.");
+ }
+ } else {
+ if(experimental) {
+ myself->connection->ecdsa = read_ecdsa_private_key(config_tree, NULL);
+
+ if(!myself->connection->ecdsa) {
+ return false;
+ }
+ }
+ }
+
+ myself->connection->rsa = read_rsa_private_key(config_tree, NULL);
+
+ if(!myself->connection->rsa) {
+ 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;
+ }
+
+ udp_rcvbuf_warnings = true;
+ }
+
+ 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;
+ }
+
+ udp_sndbuf_warnings = true;
+ }
+
+ 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 */
- if(!get_config_string(lookup_config(myself->connection->config_tree, "Cipher"), &cipher))
- cipher = xstrdup("blowfish");
+ char *cipher;
- if(!cipher_open_by_name(&myself->incipher, cipher)) {
- logger(LOG_ERR, "Unrecognized cipher type!");
+ 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;
}
- if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
- keylifetime = 3600;
+ free(cipher);
- regenerate_key();
+ timeout_add(&keyexpire_timeout, keyexpire_handler, &keyexpire_timeout, &(struct timeval) {
+ keylifetime, rand() % 100000
+ });
/* Check if we want to use message authentication codes... */
- if(!get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest))
- digest = xstrdup("sha1");
-
int maclength = 4;
- get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &maclength);
+ get_config_int(lookup_config(config_tree, "MACLength"), &maclength);
if(maclength < 0) {
- logger(LOG_ERR, "Bogus MAC length!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus MAC length!");
return false;
}
- if(!digest_open_by_name(&myself->indigest, digest, maclength)) {
- logger(LOG_ERR, "Unrecognized digest type!");
+ 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(myself->connection->config_tree, "Compression"), &myself->incompression)) {
- if(myself->incompression < 0 || myself->incompression > 11) {
- logger(LOG_ERR, "Bogus compression level!");
+ if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {
+ switch(myself->incompression) {
+ case 12:
+#ifdef HAVE_LZ4
+ break;
+#else
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "LZ4 compression is unavailable on this node.");
+ return false;
+#endif
+
+ case 11:
+ case 10:
+#ifdef HAVE_LZO
+ break;
+#else
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "LZO compression is unavailable on this node.");
+ return false;
+#endif
+
+ case 9:
+ case 8:
+ case 7:
+ case 6:
+ case 5:
+ case 4:
+ case 3:
+ case 2:
+ case 1:
+#ifdef HAVE_ZLIB
+ break;
+#else
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "ZLIB compression is unavailable on this node.");
+ return false;
+#endif
+
+ case 0:
+ break;
+
+ default:
+ logger(DEBUG_ALWAYS, LOG_ERR, "Bogus compression level!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "Compression level %i is unrecognized by this node.", myself->incompression);
return false;
}
- } else
+ } else {
myself->incompression = 0;
+ }
myself->connection->outcompression = 0;
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 */
- if(!setup_device())
- return false;
+ devops = os_devops;
- event_set(&device_ev, device_fd, EV_READ|EV_PERSIST, handle_device_data, NULL);
+ 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;
+ }
- if (event_add(&device_ev, NULL) < 0) {
- logger(LOG_ERR, "event_add failed: %s", strerror(errno));
- close_device();
- return false;
- }
+#ifdef HAVE_SYS_UN_H
+ else if(!strcasecmp(type, "fd")) {
+ devops = fd_devops;
+ }
- /* 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;
+#endif
+#ifdef ENABLE_UML
+ else if(!strcasecmp(type, "uml")) {
+ devops = uml_devops;
+ }
+
+#endif
+#ifdef ENABLE_VDE
+ else if(!strcasecmp(type, "vde")) {
+ devops = vde_devops;
+ }
- execute_script("tinc-up", envp);
+#endif
+ free(type);
+ }
- for(i = 0; i < 5; i++)
- free(envp[i]);
+ get_config_bool(lookup_config(config_tree, "DeviceStandby"), &device_standby);
- /* Run subnet-up scripts for our own subnets */
+ if(!devops.setup()) {
+ return false;
+ }
- subnet_update(myself, NULL, true);
+ if(device_fd >= 0) {
+ io_add(&device_io, handle_device_data, NULL, device_fd, IO_READ);
+ }
/* Open sockets */
- get_config_string(lookup_config(config_tree, "BindToAddress"), &address);
+ if(!do_detach && getenv("LISTEN_FDS")) {
+ sockaddr_t sa;
+ socklen_t salen;
- hint.ai_family = addressfamily;
- hint.ai_socktype = SOCK_STREAM;
- hint.ai_protocol = IPPROTO_TCP;
- hint.ai_flags = AI_PASSIVE;
+ listen_sockets = atoi(getenv("LISTEN_FDS"));
+#ifdef HAVE_UNSETENV
+ unsetenv("LISTEN_FDS");
+#endif
- err = getaddrinfo(address, myport, &hint, &ai);
+ if(listen_sockets > MAXSOCKETS) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
+ return false;
+ }
- if(err || !ai) {
- logger(LOG_ERR, "System call `%s' failed: %s", "getaddrinfo",
- gai_strerror(err));
- return false;
- }
+ for(int i = 0; i < listen_sockets; i++) {
+ salen = sizeof(sa);
- listen_sockets = 0;
+ 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;
+ }
- for(aip = ai; aip; aip = aip->ai_next) {
- listen_socket[listen_sockets].tcp =
- setup_listen_socket((sockaddr_t *) aip->ai_addr);
+#ifdef FD_CLOEXEC
+ fcntl(i + 3, F_SETFD, FD_CLOEXEC);
+#endif
- if(listen_socket[listen_sockets].tcp < 0)
- continue;
+ int udp_fd = setup_vpn_in_socket(&sa);
- listen_socket[listen_sockets].udp =
- setup_vpn_in_socket((sockaddr_t *) aip->ai_addr);
+ if(udp_fd < 0) {
+ return false;
+ }
- if(listen_socket[listen_sockets].udp < 0) {
- close(listen_socket[listen_sockets].tcp);
- continue;
- }
+ 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);
- 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_EMERG, "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;
+ int cfgs = 0;
- event_set(&listen_socket[listen_sockets].ev_udp,
- listen_socket[listen_sockets].udp,
- EV_READ|EV_PERSIST,
- handle_incoming_vpn_data, NULL);
- if(event_add(&listen_socket[listen_sockets].ev_udp, NULL) < 0) {
- logger(LOG_EMERG, "event_add failed: %s", strerror(errno));
- abort();
+ 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;
+ }
}
- ifdebug(CONNECTIONS) {
- hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
- logger(LOG_NOTICE, "Listening on %s", hostname);
- free(hostname);
+ 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;
+ }
}
- memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
- listen_sockets++;
+ if(!cfgs)
+ if(!add_listen_address(address, NULL)) {
+ return false;
+ }
+ }
- if(listen_sockets >= MAXSOCKETS) {
- logger(LOG_WARNING, "Maximum of %d listening sockets reached", MAXSOCKETS);
- break;
+ 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");
+ }
}
}
- freeaddrinfo(ai);
+ xasprintf(&myself->hostname, "MYSELF port %s", myport);
+ myself->connection->hostname = xstrdup(myself->hostname);
- if(listen_sockets)
- logger(LOG_NOTICE, "Ready");
- else {
- logger(LOG_ERR, "Unable to create any listening socket!");
- return false;
+ 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;
}
if(pinginterval < 1) {
pinginterval = 86400;
}
- } else
+ } else {
pinginterval = 60;
+ }
- if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout))
+ if(!get_config_int(lookup_config(config_tree, "PingTimeout"), &pingtimeout)) {
pingtimeout = 5;
- if(pingtimeout < 1 || pingtimeout > pinginterval)
+ }
+
+ if(pingtimeout < 1 || pingtimeout > pinginterval) {
pingtimeout = pinginterval;
+ }
- if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
+ if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize)) {
maxoutbufsize = 10 * MTU;
+ }
- if(!setup_myself())
+ 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) {
- splay_node_t *node, *next;
- connection_t *c;
- char *envp[5];
- int i;
-
- for(node = connection_tree->head; node; node = next) {
+ for(list_node_t *node = connection_list->head, *next; node; node = next) {
next = node->next;
- c = node->data;
- c->outgoing = false;
+ 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);
}
- list_delete_list(outgoing_list);
+ if(outgoing_list) {
+ 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);
+ 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);
}
- 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(!device_standby) {
+ device_disable();
+ }
+
+ free(myport);
- if(myport) free(myport);
+ if(device_fd >= 0) {
+ io_del(&device_io);
+ }
+
+ if(devops.close) {
+ devops.close();
+ }
- for(i = 0; i < 4; i++)
- free(envp[i]);
+ exit_control();
- close_device();
+ free(scriptextension);
+ free(scriptinterpreter);
return;
}