2 control.c -- Control socket handling.
3 Copyright (C) 2007 Guus Sliepen <guus@tinc-vpn.org>
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.
24 #include "control_common.h"
31 #include "splay_tree.h"
35 char controlcookie[65];
36 extern char *pidfilename;
38 static bool control_return(connection_t *c, int type, int error) {
39 return send_request(c, "%d %d %d", CONTROL, type, error);
42 static bool control_ok(connection_t *c, int type) {
43 return control_return(c, type, 0);
46 bool control_h(connection_t *c, char *request) {
49 if(!c->status.control || c->allow_request != CONTROL) {
50 logger(LOG_ERR, "Unauthorized control request from %s (%s)", c->name, c->hostname);
54 if(sscanf(request, "%*d %d", &type) != 1) {
55 logger(LOG_ERR, "Got bad %s from %s (%s)", "CONTROL", c->name, c->hostname);
62 return control_ok(c, REQ_STOP);
70 case REQ_DUMP_SUBNETS:
71 return dump_subnets(c);
73 case REQ_DUMP_CONNECTIONS:
74 return dump_connections(c);
78 return control_ok(c, REQ_PURGE);
82 if(sscanf(request, "%*d %*d %d", &new_level) != 1)
84 send_request(c, "%d %d %d", CONTROL, REQ_SET_DEBUG, debug_level);
86 debug_level = new_level;
92 return control_ok(c, REQ_RETRY);
95 logger(LOG_NOTICE, "Got '%s' command", "reload");
96 int result = reload_configuration();
97 return control_return(c, REQ_RELOAD, result);
99 case REQ_DISCONNECT: {
100 char name[MAX_STRING_SIZE];
102 splay_node_t *node, *next;
105 if(sscanf(request, "%*d %*d " MAX_STRING, name) != 1)
106 return control_return(c, REQ_DISCONNECT, -1);
108 for(node = connection_tree->head; node; node = next) {
111 if(strcmp(other->name, name))
113 terminate_connection(other, other->status.active);
117 return control_return(c, REQ_DISCONNECT, found ? 0 : -2);
120 case REQ_DUMP_TRAFFIC:
121 return dump_traffic(c);
124 c->status.pcap = true;
129 return send_request(c, "%d %d", CONTROL, REQ_INVALID);
133 bool init_control(void) {
134 randomize(controlcookie, sizeof controlcookie / 2);
135 bin2hex(controlcookie, controlcookie, sizeof controlcookie / 2);
136 controlcookie[sizeof controlcookie - 1] = 0;
138 FILE *f = fopen(pidfilename, "w");
140 logger(LOG_ERR, "Cannot write control socket cookie file %s: %s", pidfilename, strerror(errno));
145 fchmod(fileno(f), 0600);
147 chmod(pidfilename, 0600);
150 fprintf(f, "%s %s %d\n", controlcookie, myport, getpid());
156 void exit_control(void) {