2 protocol_edge.c -- handle the meta-protocol, edges
3 Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include "connection.h"
27 #include "meshlink_internal.h"
36 extern bool node_write_devclass(meshlink_handle_t *mesh, node_t *n);
38 bool send_add_edge(meshlink_handle_t *mesh, connection_t *c, const edge_t *e) {
42 sockaddr2str(&e->address, &address, &port);
44 x = send_request(mesh, c, "%d %x %s %d %s %s %s %d %x %d", ADD_EDGE, rand(),
45 e->from->name, e->from->devclass, e->to->name, address, port, e->to->devclass,
46 e->options, e->weight);
53 bool add_edge_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
56 char from_name[MAX_STRING_SIZE];
58 char to_name[MAX_STRING_SIZE];
59 char to_address[MAX_STRING_SIZE];
60 char to_port[MAX_STRING_SIZE];
66 if(sscanf(request, "%*d %*x "MAX_STRING" %d "MAX_STRING" "MAX_STRING" "MAX_STRING" %d %x %d",
67 from_name, &from_devclass, to_name, to_address, to_port, &to_devclass, &options, &weight) != 8) {
68 logger(mesh, MESHLINK_ERROR, "Got bad %s from %s (%s)", "ADD_EDGE", c->name,
73 /* Check if names are valid */
75 if(!check_id(from_name) || !check_id(to_name)) {
76 logger(mesh, MESHLINK_ERROR, "Got bad %s from %s (%s): %s", "ADD_EDGE", c->name,
77 c->hostname, "invalid name");
81 // Check if devclasses are valid
83 if(from_devclass < 0 || from_devclass > _DEV_CLASS_MAX) {
84 logger(mesh, MESHLINK_ERROR, "Got bad %s from %s (%s): %s", "ADD_EDGE", c->name,
85 c->hostname, "from devclass invalid");
89 if(to_devclass < 0 || to_devclass > _DEV_CLASS_MAX) {
90 logger(mesh, MESHLINK_ERROR, "Got bad %s from %s (%s): %s", "ADD_EDGE", c->name,
91 c->hostname, "to devclass invalid");
95 if(seen_request(mesh, request))
100 from = lookup_node(mesh, from_name);
101 to = lookup_node(mesh, to_name);
105 from->status.blacklisted = mesh->default_blacklist;
106 from->name = xstrdup(from_name);
107 node_add(mesh, from);
110 from->devclass = from_devclass;
111 node_write_devclass(mesh, from);
115 to->status.blacklisted = mesh->default_blacklist;
116 to->name = xstrdup(to_name);
120 to->devclass = to_devclass;
121 node_write_devclass(mesh, to);
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)) {
133 if(from == mesh->self) {
134 logger(mesh, MESHLINK_WARNING, "Got %s from %s (%s) for ourself which does not match existing entry",
135 "ADD_EDGE", c->name, c->hostname);
136 send_add_edge(mesh, c, e);
139 logger(mesh, MESHLINK_WARNING, "Got %s from %s (%s) which does not match existing entry",
140 "ADD_EDGE", c->name, c->hostname);
146 } else if(from == mesh->self) {
147 logger(mesh, MESHLINK_WARNING, "Got %s from %s (%s) for ourself which does not exist",
148 "ADD_EDGE", c->name, c->hostname);
149 mesh->contradicting_add_edge++;
153 send_del_edge(mesh, c, e);
161 e->address = address;
162 e->options = options;
166 /* Tell the rest about the new edge */
168 forward_request(mesh, c, request);
170 /* Run MST before or after we tell the rest? */
177 bool send_del_edge(meshlink_handle_t *mesh, connection_t *c, const edge_t *e) {
178 return send_request(mesh, c, "%d %x %s %s", DEL_EDGE, rand(),
179 e->from->name, e->to->name);
182 bool del_edge_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
184 char from_name[MAX_STRING_SIZE];
185 char to_name[MAX_STRING_SIZE];
188 if(sscanf(request, "%*d %*x "MAX_STRING" "MAX_STRING, from_name, to_name) != 2) {
189 logger(mesh, MESHLINK_ERROR, "Got bad %s from %s (%s)", "DEL_EDGE", c->name,
194 /* Check if names are valid */
196 if(!check_id(from_name) || !check_id(to_name)) {
197 logger(mesh, MESHLINK_ERROR, "Got bad %s from %s (%s): %s", "DEL_EDGE", c->name,
198 c->hostname, "invalid name");
202 if(seen_request(mesh, request))
207 from = lookup_node(mesh, from_name);
208 to = lookup_node(mesh, to_name);
211 logger(mesh, MESHLINK_ERROR, "Got %s from %s (%s) which does not appear in the edge tree",
212 "DEL_EDGE", c->name, c->hostname);
217 logger(mesh, MESHLINK_ERROR, "Got %s from %s (%s) which does not appear in the edge tree",
218 "DEL_EDGE", c->name, c->hostname);
222 /* Check if edge exists */
224 e = lookup_edge(from, to);
227 logger(mesh, MESHLINK_WARNING, "Got %s from %s (%s) which does not appear in the edge tree",
228 "DEL_EDGE", c->name, c->hostname);
232 if(e->from == mesh->self) {
233 logger(mesh, MESHLINK_WARNING, "Got %s from %s (%s) for ourself",
234 "DEL_EDGE", c->name, c->hostname);
235 mesh->contradicting_del_edge++;
236 send_add_edge(mesh, c, e); /* Send back a correction */
240 /* Tell the rest about the deleted edge */
242 forward_request(mesh, c, request);
244 /* Delete the edge */
248 /* Run MST before or after we tell the rest? */
252 /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
254 if(!to->status.reachable) {
255 e = lookup_edge(to, mesh->self);
257 send_del_edge(mesh, mesh->everyone, e);