/*
connection.c -- connection list management
- Copyright (C) 2000,2001 Guus Sliepen <guus@sliepen.warande.net>,
- 2000,2001 Ivo Timmermans <itimmermans@bigfoot.com>
+ Copyright (C) 2000-2012 Guus Sliepen <guus@tinc-vpn.org>,
+ 2000-2005 Ivo Timmermans
+ 2008 Max Rijevski <maksuf@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id: connection.c,v 1.1.2.10 2001/03/04 13:59:25 guus Exp $
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#include "config.h"
-
-#include <stdio.h>
-#include <syslog.h>
-
-#include <avl_tree.h>
-#include <list.h>
+#include "system.h"
-#include "net.h" /* Don't ask. */
-#include "netutl.h"
-#include "config.h"
+#include "avl_tree.h"
#include "conf.h"
-#include <utils.h>
+#include "logger.h"
#include "subnet.h"
-
+#include "utils.h"
#include "xalloc.h"
-#include "system.h"
-
-/* Root of the connection list */
-avl_tree_t *connection_tree;
-avl_tree_t *id_tree;
+avl_tree_t *connection_tree; /* Meta connections */
+connection_t *everyone;
-/* Pointer to connection describing myself */
-
-connection_t *myself = NULL;
-
-/* Initialization and callbacks */
-
-int connection_compare(connection_t *a, connection_t *b)
-{
- ipv4_t result;
-
- result = a->address - b->address;
- if(result)
- return result;
- else
- return a->port - b->port;
+static int connection_compare(const connection_t *a, const connection_t *b) {
+ return a < b ? -1 : a == b ? 0 : 1;
}
-int id_compare(connection_t *a, connection_t *b)
-{
- return strcmp(a->name, b->name);
+void init_connections(void) {
+ connection_tree = avl_alloc_tree((avl_compare_t) connection_compare, (avl_action_t) free_connection);
+ everyone = new_connection();
+ everyone->name = xstrdup("everyone");
+ everyone->hostname = xstrdup("BROADCAST");
}
-void init_connections(void)
-{
- connection_tree = avl_alloc_tree((avl_compare_t)connection_compare, (avl_action_t)free_connection);
- id_tree = avl_alloc_tree((avl_compare_t)id_compare, NULL);
+void exit_connections(void) {
+ avl_delete_tree(connection_tree);
+ free_connection(everyone);
}
-/* Creation and deletion of connection elements */
+connection_t *new_connection(void) {
+ connection_t *c;
-connection_t *new_connection(void)
-{
- connection_t *p = (connection_t *)xmalloc_and_zero(sizeof(*p));
-cp
- p->subnet_tree = avl_alloc_tree((avl_compare_t)subnet_compare, NULL);
- p->queue = list_alloc((list_action_t)free);
-cp
- return p;
-}
+ c = xmalloc_and_zero(sizeof(connection_t));
-void free_connection(connection_t *p)
-{
-cp
- if(p->queue)
- list_delete_list(p->queue);
- if(p->name && p->name!=unknown)
- free(p->name);
- if(p->hostname)
- free(p->hostname);
- if(p->rsa_key)
- RSA_free(p->rsa_key);
- if(p->cipher_pktkey)
- free(p->cipher_pktkey);
- if(p->buffer)
- free(p->buffer);
- if(p->config)
- clear_config(&p->config);
- free(p);
-cp
-}
+ if(!c)
+ return NULL;
-/*
- remove all marked connections
-*/
-void prune_connection_tree(void)
-{
- avl_node_t *node, *next;
- connection_t *cl;
-cp
- for(node = connection_tree->head; node; node = next)
- {
- next = node->next;
- cl = (connection_t *)node->data;
- if(cl->status.remove)
- connection_del(cl);
- }
-cp
-}
-
-/*
- free all elements of connection
-*/
-void destroy_connection_tree(void)
-{
-cp
- avl_delete_tree(id_tree);
- avl_delete_tree(connection_tree);
-cp
-}
-
-/* Linked list management */
+ gettimeofday(&c->start, NULL);
-void connection_add(connection_t *cl)
-{
-cp
- avl_insert(connection_tree, cl);
-cp
+ return c;
}
-void id_add(connection_t *cl)
-{
-cp
- avl_insert(id_tree, cl);
-cp
+void free_connection_partially(connection_t *c) {
+ free(c->inkey);
+ free(c->outkey);
+ free(c->mychallenge);
+ free(c->hischallenge);
+ free(c->outbuf);
+
+ c->inkey = NULL;
+ c->outkey = NULL;
+ c->mychallenge = NULL;
+ c->hischallenge = NULL;
+ c->outbuf = NULL;
+
+ c->status.pinged = false;
+ c->status.active = false;
+ c->status.connecting = false;
+ c->status.timeout = false;
+ c->status.encryptout = false;
+ c->status.decryptin = false;
+ c->status.mst = false;
+
+ c->options = 0;
+ c->buflen = 0;
+ c->reqlen = 0;
+ c->tcplen = 0;
+ c->allow_request = 0;
+ c->outbuflen = 0;
+ c->outbufsize = 0;
+ c->outbufstart = 0;
+ c->last_ping_time = 0;
+ c->last_flushed_time = 0;
+
+ if(c->inctx) {
+ EVP_CIPHER_CTX_cleanup(c->inctx);
+ free(c->inctx);
+ c->inctx = NULL;
+ }
+
+ if(c->outctx) {
+ EVP_CIPHER_CTX_cleanup(c->outctx);
+ free(c->outctx);
+ c->outctx = NULL;
+ }
+
+ if(c->rsa_key) {
+ RSA_free(c->rsa_key);
+ c->rsa_key = NULL;
+ }
}
-void connection_del(connection_t *cl)
-{
-cp
- avl_delete(id_tree, cl);
- avl_delete(connection_tree, cl);
-cp
-}
+void free_connection(connection_t *c) {
+ free_connection_partially(c);
-/* Lookup functions */
+ free(c->name);
+ free(c->hostname);
-connection_t *lookup_connection(ipv4_t address, short unsigned int port)
-{
- connection_t cl;
-cp
- cl.address = address;
- cl.port = port;
+ if(c->config_tree)
+ exit_configuration(&c->config_tree);
- return avl_search(connection_tree, &cl);
+ free(c);
}
-connection_t *lookup_id(char *name)
-{
- connection_t cl, *p;
-cp
- cl.name = name;
- p = avl_search(id_tree, &cl);
- if(p && p->status.active)
- return p;
- else
- return NULL;
+void connection_add(connection_t *c) {
+ avl_insert(connection_tree, c);
}
-/* Debugging */
-
-void dump_connection_list(void)
-{
- avl_node_t *node;
- connection_t *cl;
-cp
- syslog(LOG_DEBUG, _("Connection list:"));
-
- syslog(LOG_DEBUG, _(" %s at %s port %hd options %ld sockets %d, %d status %04x"),
- myself->name, myself->hostname, myself->port, myself->options,
- myself->socket, myself->meta_socket, myself->status);
-
- for(node = connection_tree->head; node; node = node->next)
- {
- cl = (connection_t *)node->data;
- syslog(LOG_DEBUG, _(" %s at %s port %hd options %ld sockets %d, %d status %04x"),
- cl->name, cl->hostname, cl->port, cl->options,
- cl->socket, cl->meta_socket, cl->status);
- }
-
- syslog(LOG_DEBUG, _("End of connection list."));
-cp
+void connection_del(connection_t *c) {
+ avl_delete(connection_tree, c);
}
-int read_host_config(connection_t *cl)
-{
- char *fname;
- int x;
-cp
- asprintf(&fname, "%s/hosts/%s", confbase, cl->name);
- x = read_config_file(&cl->config, fname);
- free(fname);
-cp
- return x;
+void dump_connections(void) {
+ avl_node_t *node;
+ connection_t *c;
+
+ logger(LOG_DEBUG, "Connections:");
+
+ for(node = connection_tree->head; node; node = node->next) {
+ c = node->data;
+ logger(LOG_DEBUG, " %s at %s options %x socket %d status %04x outbuf %d/%d/%d",
+ c->name, c->hostname, c->options, c->socket, bitfield_to_int(&c->status, sizeof c->status),
+ c->outbufsize, c->outbufstart, c->outbuflen);
+ }
+
+ logger(LOG_DEBUG, "End of connections.");
}
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