/*
net_setup.c -- Setup.
- Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2013 Guus Sliepen <guus@tinc-vpn.org>
- 2006 Scott Lamb <slamb@slamb.org>
- 2010 Brandon Black <blblack@gmail.com>
+ Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
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 "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 "names.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 io_t device_io;
-devops_t devops;
char *proxyhost;
char *proxyport;
int autoconnect;
bool disablebuggypeers;
-char *scriptinterpreter;
-char *scriptextension;
-
bool node_read_ecdsa_public_key(node_t *n) {
if(ecdsa_active(n->ecdsa))
return true;
fp = fopen(pubname, "r");
- if(!fp) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA public key file `%s': %s", pubname, strerror(errno));
+ if(!fp)
goto exit;
- }
n->ecdsa = ecdsa_read_pem_public_key(fp);
fclose(fp);
if(!fp) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error reading ECDSA private key file `%s': %s", fname, strerror(errno));
if(errno == ENOENT)
- logger(DEBUG_ALWAYS, LOG_INFO, "Create an ECDSA keypair with `tinc -n %s generate-ecdsa-keys'.", netname ?: ".");
+ logger(DEBUG_ALWAYS, LOG_INFO, "Create an ECDSA keypair with `tinc generate-ecdsa-keys'.");
free(fname);
return false;
}
send_key_changed();
}
-/*
- Read Subnets from all host config files
-*/
-void load_all_subnets(void) {
- DIR *dir;
- struct dirent *ent;
- char *dname;
-
- xasprintf(&dname, "%s" SLASH "hosts", confbase);
- dir = opendir(dname);
- if(!dir) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", dname, strerror(errno));
- free(dname);
- return;
- }
-
- while((ent = readdir(dir))) {
- if(!check_id(ent->d_name))
- continue;
-
- node_t *n = lookup_node(ent->d_name);
- #ifdef _DIRENT_HAVE_D_TYPE
- //if(ent->d_type != DT_REG)
- // continue;
- #endif
-
- 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);
-
- if(!n) {
- n = new_node();
- n->name = xstrdup(ent->d_name);
- node_add(n);
- }
-
- 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;
- } else {
- subnet_add(n, s);
- }
- }
-
- exit_configuration(&config_tree);
- }
-
- closedir(dir);
-}
-
void load_all_nodes(void) {
DIR *dir;
struct dirent *ent;
if(*name == '$') {
char *envname = getenv(name + 1);
+ char hostname[32] = "";
if(!envname) {
if(strcmp(name + 1, "HOST")) {
logger(DEBUG_ALWAYS, LOG_ERR, "Invalid Name: environment variable %s does not exist\n", name + 1);
return false;
}
- char envname[32];
- if(gethostname(envname, 32)) {
+ if(gethostname(hostname, sizeof hostname) || !*hostname) {
logger(DEBUG_ALWAYS, LOG_ERR, "Could not get hostname: %s\n", strerror(errno));
return false;
}
- envname[31] = 0;
+ hostname[31] = 0;
+ envname = hostname;
}
free(name);
name = xstrdup(envname);
char *space;
bool choice;
- 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("");
-
get_config_string(lookup_config(config_tree, "Proxy"), &proxy);
if(proxy) {
if((space = strchr(proxy, ' ')))
keylifetime = 3600;
get_config_int(lookup_config(config_tree, "AutoConnect"), &autoconnect);
+ if(autoconnect < 0)
+ autoconnect = 0;
get_config_bool(lookup_config(config_tree, "DisableBuggyPeers"), &disablebuggypeers);
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;
+
+ 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(tcp_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;
+}
+
/*
Configure node_t myself and set up the local sockets (listen only)
*/
-static bool setup_myself(void) {
+bool setup_myself(void) {
char *name, *hostname, *cipher, *digest, *type;
char *address = NULL;
+ bool port_specified = false;
if(!(name = get_name())) {
logger(DEBUG_ALWAYS, LOG_ERR, "Name for tinc daemon required!");
if(!get_config_string(lookup_config(config_tree, "Port"), &myport))
myport = xstrdup("655");
-
- xasprintf(&myself->hostname, "MYSELF port %s", myport);
- myself->connection->hostname = xstrdup(myself->hostname);
+ else
+ port_specified = true;
myself->connection->options = 0;
myself->connection->protocol_major = PROT_MAJOR;
myself->options |= PROT_MINOR << 24;
- get_config_bool(lookup_config(config_tree, "ExperimentalProtocol"), &experimental);
-
- if(experimental && !read_ecdsa_private_key())
- return false;
+ 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())
return false;
+ /* Ensure myport is numeric */
+
if(!atoi(myport)) {
struct addrinfo *ai = str2addrinfo("localhost", myport, SOCK_DGRAM);
sockaddr_t sa;
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!");
}
}
- 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;
- }
- }
-
int replaywin_int;
if(get_config_int(lookup_config(config_tree, "ReplayWindow"), &replaywin_int)) {
if(replaywin_int < 0) {
if(!get_config_string(lookup_config(config_tree, "Cipher"), &cipher))
cipher = xstrdup("blowfish");
- if(!(myself->incipher = cipher_open_by_name(cipher))) {
+ if(!strcasecmp(cipher, "none")) {
+ myself->incipher = NULL;
+ } else if(!(myself->incipher = cipher_open_by_name(cipher))) {
logger(DEBUG_ALWAYS, LOG_ERR, "Unrecognized cipher type!");
return false;
}
if(!get_config_string(lookup_config(config_tree, "Digest"), &digest))
digest = xstrdup("sha1");
- if(!(myself->indigest = digest_open_by_name(digest, maclength))) {
+ 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!");
return false;
}
graph();
- if(strictsubnets)
- load_all_subnets();
- else if(autoconnect)
+ if(autoconnect)
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 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)
- 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
+ listen_sockets = 0;
+ int cfgs = 0;
- if(listen_sockets > MAXSOCKETS) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Too many listening sockets");
+ 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(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(errno));
- return false;
- }
+ }
-#ifdef FD_CLOEXEC
- fcntl(i + 3, F_SETFD, FD_CLOEXEC);
-#endif
+ 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;
+ }
- int udp_fd = setup_vpn_in_socket(&sa);
- if(udp_fd < 0)
- return false;
+ if(!cfgs)
+ if(!add_listen_address(address, NULL))
+ 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(!listen_sockets) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!");
+ return false;
+ }
- if(debug_level >= DEBUG_CONNECTIONS) {
- hostname = sockaddr2hostname(&sa);
- logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname);
- free(hostname);
- }
+ /* If no Port option was specified, set myport to the port used by the first listening socket. */
- memcpy(&listen_socket[i].sa, &sa, salen);
+ if(!port_specified) {
+ 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");
}
- } else {
- listen_sockets = 0;
- config_t *cfg = lookup_config(config_tree, "BindToAddress");
-
- do {
- get_config_string(cfg, &address);
- if(cfg)
- cfg = lookup_config_next(config_tree, cfg);
-
- char *port = myport;
-
- if(address) {
- char *space = strchr(address, ' ');
- if(space) {
- *space++ = 0;
- port = space;
- }
-
- if(!strcmp(address, "*"))
- *address = 0;
- }
-
- struct addrinfo *ai, hint = {0};
- hint.ai_family = addressfamily;
- hint.ai_socktype = SOCK_STREAM;
- hint.ai_protocol = IPPROTO_TCP;
- hint.ai_flags = AI_PASSIVE;
-
- 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) {
- 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(tcp_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) {
- hostname = sockaddr2hostname((sockaddr_t *) aip->ai_addr);
- logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Listening on %s", hostname);
- free(hostname);
- }
-
- memcpy(&listen_socket[listen_sockets].sa, aip->ai_addr, aip->ai_addrlen);
- listen_sockets++;
- }
-
- freeaddrinfo(ai);
- } while(cfg);
}
- if(!listen_sockets) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Unable to create any listening socket!");
- return false;
- }
+ xasprintf(&myself->hostname, "MYSELF port %s", myport);
+ myself->connection->hostname = xstrdup(myself->hostname);
+
+ /* Done. */
last_config_check = now.tv_sec;
*/
bool setup_network(void) {
init_connections();
- init_subnets();
init_nodes();
init_edges();
init_requests();
if(!setup_myself())
return false;
- if(!init_control())
- return false;
-
- /* Run tinc-up script to further initialize the tap interface */
-
- char *envp[5] = {NULL};
- xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
- xasprintf(&envp[1], "DEVICE=%s", device ? : "");
- xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
- xasprintf(&envp[3], "NAME=%s", myself->name);
-
- execute_script("tinc-up", envp);
-
- for(int i = 0; i < 4; i++)
- free(envp[i]);
-
- /* Run subnet-up scripts for our own subnets */
-
- subnet_update(myself, NULL, true);
-
return true;
}
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);
}
- 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);
}
close(listen_socket[i].udp.fd);
}
- char *envp[5] = {NULL};
- xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
- xasprintf(&envp[1], "DEVICE=%s", device ? : "");
- xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
- xasprintf(&envp[3], "NAME=%s", myself->name);
-
exit_requests();
exit_edges();
- exit_subnets();
exit_nodes();
exit_connections();
- execute_script("tinc-down", envp);
-
if(myport) free(myport);
- for(int i = 0; i < 4; i++)
- free(envp[i]);
-
- devops.close();
-
- exit_control();
-
return;
}
projects / meshlink / blobdiff