2 node.c -- node tree management
3 Copyright (C) 2001-2013 Guus Sliepen <guus@tinc-vpn.org>,
4 2001-2005 Ivo Timmermans
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include "address_cache.h"
24 #include "control_common.h"
29 #include "splay_tree.h"
33 #include "ed25519/sha512.h"
37 static int node_compare(const node_t *a, const node_t *b) {
38 return strcmp(a->name, b->name);
41 static int node_id_compare(const node_t *a, const node_t *b) {
42 return memcmp(&a->id, &b->id, sizeof(node_id_t));
45 static int node_udp_compare(const node_t *a, const node_t *b) {
46 int result = sockaddrcmp(&a->address, &b->address);
52 return (a->name && b->name) ? strcmp(a->name, b->name) : 0;
55 splay_tree_t node_tree = {
56 .compare = (splay_compare_t) node_compare,
57 .delete = (splay_action_t) free_node,
60 static splay_tree_t node_id_tree = {
61 .compare = (splay_compare_t) node_id_compare,
64 static splay_tree_t node_udp_tree = {
65 .compare = (splay_compare_t) node_udp_compare,
68 void exit_nodes(void) {
69 splay_empty_tree(&node_udp_tree);
70 splay_empty_tree(&node_id_tree);
71 splay_empty_tree(&node_tree);
74 node_t *new_node(void) {
75 node_t *n = xzalloc(sizeof(*n));
78 n->late = xzalloc(replaywin);
81 init_subnet_tree(&n->subnet_tree);
82 init_edge_tree(&n->edge_tree);
91 void free_node(node_t *n) {
92 splay_empty_tree(&n->subnet_tree);
93 splay_empty_tree(&n->edge_tree);
95 sockaddrfree(&n->address);
97 #ifndef DISABLE_LEGACY
98 cipher_free(&n->incipher);
99 digest_free(&n->indigest);
100 cipher_free(&n->outcipher);
101 digest_free(&n->outdigest);
104 ecdsa_free(n->ecdsa);
105 sptps_stop(&n->sptps);
107 timeout_del(&n->udp_ping_timeout);
113 if(n->address_cache) {
114 close_address_cache(n->address_cache);
120 void node_add(node_t *n) {
121 unsigned char buf[64];
122 sha512(n->name, strlen(n->name), buf);
123 memcpy(&n->id, buf, sizeof(n->id));
125 splay_insert(&node_tree, n);
126 splay_insert(&node_id_tree, n);
129 void node_del(node_t *n) {
130 splay_delete(&node_udp_tree, n);
132 for splay_each(subnet_t, s, &n->subnet_tree) {
136 for splay_each(edge_t, e, &n->edge_tree) {
140 splay_delete(&node_id_tree, n);
141 splay_delete(&node_tree, n);
144 node_t *lookup_node(char *name) {
149 return splay_search(&node_tree, &n);
152 node_t *lookup_node_id(const node_id_t *id) {
153 node_t n = {.id = *id};
154 return splay_search(&node_id_tree, &n);
157 node_t *lookup_node_udp(const sockaddr_t *sa) {
158 node_t tmp = {.address = *sa};
159 return splay_search(&node_udp_tree, &tmp);
162 void update_node_udp(node_t *n, const sockaddr_t *sa) {
164 logger(DEBUG_ALWAYS, LOG_WARNING, "Trying to update UDP address of myself!");
168 splay_delete(&node_udp_tree, n);
174 for(int i = 0; i < listen_sockets; i++) {
175 if(listen_socket[i].sa.sa.sa_family == sa->sa.sa_family) {
181 splay_insert(&node_udp_tree, n);
183 n->hostname = sockaddr2hostname(&n->address);
184 logger(DEBUG_PROTOCOL, LOG_DEBUG, "UDP address of %s set to %s", n->name, n->hostname);
187 /* invalidate UDP information - note that this is a security feature as well to make sure
188 we can't be tricked into flooding any random address with UDP packets */
189 n->status.udp_confirmed = false;
196 bool dump_nodes(connection_t *c) {
197 for splay_each(node_t, n, &node_tree) {
198 char id[2 * sizeof(n->id) + 1];
200 for(size_t c = 0; c < sizeof(n->id); ++c) {
201 snprintf(id + 2 * c, 3, "%02x", n->id.x[c]);
204 id[sizeof(id) - 1] = 0;
205 send_request(c, "%d %d %s %s %s %d %d %zu %d %x %x %s %s %d %d %d %d %ld %d %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64, CONTROL, REQ_DUMP_NODES,
206 n->name, id, n->hostname ? n->hostname : "unknown port unknown",
207 #ifdef DISABLE_LEGACY
210 cipher_get_nid(n->outcipher), digest_get_nid(n->outdigest), digest_length(n->outdigest),
212 n->outcompression, n->options, bitfield_to_int(&n->status, sizeof(n->status)),
213 n->nexthop ? n->nexthop->name : "-", n->via && n->via->name ? n->via->name : "-", n->distance,
214 n->mtu, n->minmtu, n->maxmtu, (long)n->last_state_change, n->udp_ping_rtt,
215 n->in_packets, n->in_bytes, n->out_packets, n->out_bytes);
218 return send_request(c, "%d %d", CONTROL, REQ_DUMP_NODES);
221 bool dump_traffic(connection_t *c) {
222 for splay_each(node_t, n, &node_tree)
223 send_request(c, "%d %d %s %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64, CONTROL, REQ_DUMP_TRAFFIC,
224 n->name, n->in_packets, n->in_bytes, n->out_packets, n->out_bytes);
226 return send_request(c, "%d %d", CONTROL, REQ_DUMP_TRAFFIC);