2 protocol_edge.c -- handle the meta-protocol, edges
3 Copyright (C) 1999-2005 Ivo Timmermans,
4 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
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
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include "connection.h"
39 bool send_add_edge(connection_t *c, const edge_t *e)
46 sockaddr2str(&e->address, &address, &port);
48 x = send_request(c, "%d %lx %s %s %s %s %lx %d", ADD_EDGE, random(),
49 e->from->name, e->to->name, address, port,
50 e->options, e->weight);
57 bool add_edge_h(connection_t *c)
61 char from_name[MAX_STRING_SIZE];
62 char to_name[MAX_STRING_SIZE];
63 char to_address[MAX_STRING_SIZE];
64 char to_port[MAX_STRING_SIZE];
71 if(sscanf(c->buffer, "%*d %*x "MAX_STRING" "MAX_STRING" "MAX_STRING" "MAX_STRING" %lx %d",
72 from_name, to_name, to_address, to_port, &options, &weight) != 6) {
73 logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ADD_EDGE", c->name,
78 /* Check if names are valid */
80 if(!check_id(from_name)) {
81 logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_EDGE", c->name,
82 c->hostname, _("invalid name"));
86 if(!check_id(to_name)) {
87 logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ADD_EDGE", c->name,
88 c->hostname, _("invalid name"));
92 if(seen_request(c->buffer))
97 from = lookup_node(from_name);
98 to = lookup_node(to_name);
101 from != myself && from != c->node &&
102 to != myself && to != c->node) {
103 /* ignore indirect edge registrations for tunnelserver */
104 ifdebug(PROTOCOL) logger(LOG_WARNING,
105 _("Ignoring indirect %s from %s (%s)"),
106 "ADD_EDGE", c->name, c->hostname);
112 from->name = xstrdup(from_name);
118 to->name = xstrdup(to_name);
123 /* Convert addresses */
125 address = str2sockaddr(to_address, to_port);
127 /* Check if edge already exists */
129 e = lookup_edge(from, to);
132 if(e->weight != weight || e->options != options || sockaddrcmp(&e->address, &address)) {
134 ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) for ourself which does not match existing entry"),
135 "ADD_EDGE", c->name, c->hostname);
139 ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) which does not match existing entry"),
140 "ADD_EDGE", c->name, c->hostname);
146 } else if(from == myself) {
147 ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) for ourself which does not exist"),
148 "ADD_EDGE", c->name, c->hostname);
160 e->address = address;
161 e->options = options;
165 /* Tell the rest about the new edge */
170 /* Run MST before or after we tell the rest? */
177 bool send_del_edge(connection_t *c, const edge_t *e)
181 return send_request(c, "%d %lx %s %s", DEL_EDGE, random(),
182 e->from->name, e->to->name);
185 bool del_edge_h(connection_t *c)
188 char from_name[MAX_STRING_SIZE];
189 char to_name[MAX_STRING_SIZE];
194 if(sscanf(c->buffer, "%*d %*x "MAX_STRING" "MAX_STRING, from_name, to_name) != 2) {
195 logger(LOG_ERR, _("Got bad %s from %s (%s)"), "DEL_EDGE", c->name,
200 /* Check if names are valid */
202 if(!check_id(from_name)) {
203 logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_EDGE", c->name,
204 c->hostname, _("invalid name"));
208 if(!check_id(to_name)) {
209 logger(LOG_ERR, _("Got bad %s from %s (%s): %s"), "DEL_EDGE", c->name,
210 c->hostname, _("invalid name"));
214 if(seen_request(c->buffer))
219 from = lookup_node(from_name);
220 to = lookup_node(to_name);
223 from != myself && from != c->node &&
224 to != myself && to != c->node) {
225 /* ignore indirect edge registrations for tunnelserver */
226 ifdebug(PROTOCOL) logger(LOG_WARNING,
227 _("Ignoring indirect %s from %s (%s)"),
228 "DEL_EDGE", c->name, c->hostname);
233 ifdebug(PROTOCOL) logger(LOG_ERR, _("Got %s from %s (%s) which does not appear in the edge tree"),
234 "DEL_EDGE", c->name, c->hostname);
239 ifdebug(PROTOCOL) logger(LOG_ERR, _("Got %s from %s (%s) which does not appear in the edge tree"),
240 "DEL_EDGE", c->name, c->hostname);
244 /* Check if edge exists */
246 e = lookup_edge(from, to);
249 ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) which does not appear in the edge tree"),
250 "DEL_EDGE", c->name, c->hostname);
254 if(e->from == myself) {
255 ifdebug(PROTOCOL) logger(LOG_WARNING, _("Got %s from %s (%s) for ourself"),
256 "DEL_EDGE", c->name, c->hostname);
257 send_add_edge(c, e); /* Send back a correction */
261 /* Tell the rest about the deleted edge */
266 /* Delete the edge */
270 /* Run MST before or after we tell the rest? */
274 /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
276 if(!to->status.reachable) {
277 e = lookup_edge(to, myself);
280 send_del_edge(broadcast, e);