146 lines
3.7 KiB
C
146 lines
3.7 KiB
C
/*
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control.c -- Control socket handling.
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Copyright (C) 2007 Guus Sliepen <guus@tinc-vpn.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "system.h"
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#include "crypto.h"
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#include "conf.h"
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#include "control.h"
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#include "control_common.h"
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#include "graph.h"
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#include "logger.h"
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#include "protocol.h"
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#include "utils.h"
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#include "xalloc.h"
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char controlcookie[65];
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extern char *controlcookiename;
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static bool control_return(connection_t *c, int type, int error) {
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return send_request(c, "%d %d %d", CONTROL, type, error);
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}
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static bool control_ok(connection_t *c, int type) {
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return control_return(c, type, 0);
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}
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bool control_h(connection_t *c, char *request) {
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int type;
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if(!c->status.control || c->allow_request != CONTROL) {
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logger(LOG_ERR, "Unauthorized control request from %s (%s)", c->name, c->hostname);
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return false;
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}
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if(sscanf(request, "%*d %d", &type) != 1) {
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logger(LOG_ERR, "Got bad %s from %s (%s)", "CONTROL", c->name, c->hostname);
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return false;
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}
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switch (type) {
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case REQ_STOP:
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event_loopexit(NULL);
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return control_ok(c, REQ_STOP);
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case REQ_DUMP_NODES:
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return dump_nodes(c);
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case REQ_DUMP_EDGES:
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return dump_edges(c);
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case REQ_DUMP_SUBNETS:
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return dump_subnets(c);
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case REQ_DUMP_CONNECTIONS:
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return dump_connections(c);
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case REQ_PURGE:
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purge();
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return control_ok(c, REQ_PURGE);
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case REQ_SET_DEBUG: {
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int new_level;
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if(sscanf(request, "%*d %*d %d", &new_level) != 1)
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return false;
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send_request(c, "%d %d %d", CONTROL, REQ_SET_DEBUG, debug_level);
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if(new_level >= 0)
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debug_level = new_level;
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return true;
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}
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case REQ_RETRY:
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retry();
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return control_ok(c, REQ_RETRY);
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case REQ_RELOAD:
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logger(LOG_NOTICE, "Got '%s' command", "reload");
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int result = reload_configuration();
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return control_return(c, REQ_RELOAD, result);
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case REQ_DISCONNECT: {
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char name[MAX_STRING_SIZE];
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connection_t *other;
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splay_node_t *node, *next;
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bool found = false;
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if(sscanf(request, "%*d %*d " MAX_STRING, name) != 1)
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return control_return(c, REQ_DISCONNECT, -1);
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for(node = connection_tree->head; node; node = next) {
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next = node->next;
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other = node->data;
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if(strcmp(other->name, name))
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continue;
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terminate_connection(other, other->status.active);
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found = true;
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}
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return control_return(c, REQ_DISCONNECT, found ? 0 : -2);
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}
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default:
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return send_request(c, "%d %d", CONTROL, REQ_INVALID);
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}
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}
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bool init_control() {
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randomize(controlcookie, sizeof controlcookie / 2);
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bin2hex(controlcookie, controlcookie, sizeof controlcookie / 2);
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controlcookie[sizeof controlcookie - 1] = 0;
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FILE *f = fopen(controlcookiename, "w");
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if(!f) {
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logger(LOG_ERR, "Cannot write control socket cookie file %s: %s", controlcookiename, strerror(errno));
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return false;
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}
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#ifdef HAVE_FCHMOD
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fchmod(fileno(f), 0600);
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#else
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chmod(controlcookiename, 0600);
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#endif
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fprintf(f, "%s %s %d\n", controlcookie, myport, getpid());
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fclose(f);
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return true;
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}
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void exit_control() {
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unlink(controlcookiename);
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}
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