edebf579f2
The control socket code was completely different from how meta connections are handled, resulting in lots of extra code to handle requests. Also, not every operating system has UNIX sockets, so we have to resort to another type of sockets or pipes for those anyway. To reduce code duplication and make control sockets work the same on all platforms, we now just connect to the TCP port where tincd is already listening on. To authenticate, the program that wants to control a running tinc daemon must send the contents of a cookie file. The cookie is a random 256 bits number that is regenerated every time tincd starts. The cookie file should only be readable by the same user that can start a tincd. Instead of the binary-ish protocol previously used, we now use an ASCII protocol similar to that of the meta connections, but this can still change.
119 lines
3 KiB
C
119 lines
3 KiB
C
/*
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connection.c -- connection list management
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Copyright (C) 2000-2009 Guus Sliepen <guus@tinc-vpn.org>,
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2000-2005 Ivo Timmermans
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2008 Max Rijevski <maksuf@gmail.com>
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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 "splay_tree.h"
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#include "cipher.h"
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#include "conf.h"
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#include "control_common.h"
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#include "list.h"
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#include "logger.h"
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#include "net.h" /* Don't ask. */
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#include "netutl.h"
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#include "subnet.h"
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#include "utils.h"
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#include "xalloc.h"
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splay_tree_t *connection_tree; /* Meta connections */
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connection_t *broadcast;
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static int connection_compare(const connection_t *a, const connection_t *b) {
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return a < b ? -1 : a == b ? 0 : 1;
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}
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void init_connections(void) {
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connection_tree = splay_alloc_tree((splay_compare_t) connection_compare, (splay_action_t) free_connection);
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broadcast = new_connection();
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broadcast->name = xstrdup("everyone");
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broadcast->hostname = xstrdup("BROADCAST");
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}
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void exit_connections(void) {
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splay_delete_tree(connection_tree);
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free_connection(broadcast);
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}
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connection_t *new_connection(void) {
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return xmalloc_and_zero(sizeof(connection_t));
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}
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void free_connection(connection_t *c) {
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if(!c)
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return;
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if(c->name)
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free(c->name);
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if(c->hostname)
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free(c->hostname);
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cipher_close(&c->incipher);
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cipher_close(&c->outcipher);
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if(c->hischallenge)
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free(c->hischallenge);
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if(c->config_tree)
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exit_configuration(&c->config_tree);
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if(c->buffer)
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bufferevent_free(c->buffer);
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if(event_initialized(&c->inevent))
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event_del(&c->inevent);
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free(c);
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}
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void connection_add(connection_t *c) {
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splay_insert(connection_tree, c);
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}
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void connection_del(connection_t *c) {
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splay_delete(connection_tree, c);
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}
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bool dump_connections(connection_t *cdump) {
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splay_node_t *node;
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connection_t *c;
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for(node = connection_tree->head; node; node = node->next) {
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c = node->data;
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send_request(cdump, "%d %d %s at %s options %x socket %d status %04x",
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CONTROL, REQ_DUMP_CONNECTIONS,
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c->name, c->hostname, c->options, c->socket,
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bitfield_to_int(&c->status, sizeof c->status));
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}
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return send_request(cdump, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
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}
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bool read_connection_config(connection_t *c) {
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char *fname;
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int x;
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xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
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x = read_config_file(c->config_tree, fname);
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free(fname);
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return x == 0;
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}
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