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/*
connection.c -- connection list management
Copyright (C) 2000-2016 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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "system.h"
#include "avl_tree.h"
#include "conf.h"
#include "logger.h"
#include "subnet.h"
#include "utils.h"
#include "xalloc.h"
avl_tree_t *connection_tree; /* Meta connections */
connection_t *everyone;
static int connection_compare(const connection_t *a, const connection_t *b) {
return a < b ? -1 : a == b ? 0 : 1;
}
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 exit_connections(void) {
avl_delete_tree(connection_tree);
free_connection(everyone);
}
connection_t *new_connection(void) {
connection_t *c;
c = xmalloc_and_zero(sizeof(connection_t));
if(!c) {
return NULL;
}
gettimeofday(&c->start, NULL);
return c;
}
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;
c->inbudget = 0;
c->outbudget = 0;
if(c->inctx) {
EVP_CIPHER_CTX_reset(c->inctx);
free(c->inctx);
c->inctx = NULL;
}
if(c->outctx) {
EVP_CIPHER_CTX_reset(c->outctx);
free(c->outctx);
c->outctx = NULL;
}
if(c->rsa_key) {
RSA_free(c->rsa_key);
c->rsa_key = NULL;
}
}
void free_connection(connection_t *c) {
free_connection_partially(c);
free(c->name);
free(c->hostname);
if(c->config_tree) {
exit_configuration(&c->config_tree);
}
free(c);
}
void connection_add(connection_t *c) {
avl_insert(connection_tree, c);
}
void connection_del(connection_t *c) {
avl_delete(connection_tree, c);
}
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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