/*
connection.c -- connection list management
- Copyright (C) 2000-2002 Guus Sliepen <guus@sliepen.eu.org>,
- 2000-2002 Ivo Timmermans <ivo@o2w.nl>
+ Copyright (C) 2000-2013 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 1.1.2.32 2002/09/09 19:39:58 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 "system.h"
-#include <stdio.h>
-#include <syslog.h>
-#include <string.h>
-#include <sys/time.h>
+#include "list.h"
+#include "cipher.h"
+#include "conf.h"
+#include "control_common.h"
+#include "logger.h"
+#include "net.h"
+#include "rsa.h"
+#include "utils.h"
+#include "xalloc.h"
-#include <avl_tree.h>
-#include <list.h>
+list_t connection_list = {
+ .head = NULL,
+ .tail = NULL,
+ .count = 0,
+ .delete = (list_action_t) free_connection,
+};
-#include "net.h" /* Don't ask. */
-#include "netutl.h"
-#include "config.h"
-#include "conf.h"
-#include <utils.h>
-#include "subnet.h"
+connection_t *everyone;
-#include "xalloc.h"
-#include "system.h"
+void init_connections(void) {
+ everyone = new_connection();
+ everyone->name = xstrdup("everyone");
+ everyone->hostname = xstrdup("BROADCAST");
+}
+
+void exit_connections(void) {
+ list_empty_list(&connection_list);
-avl_tree_t *connection_tree; /* Meta connections */
-connection_t *broadcast;
+ free_connection(everyone);
+ everyone = NULL;
+}
-int connection_compare(connection_t *a, connection_t *b)
-{
- return a - b;
+connection_t *new_connection(void) {
+ return xzalloc(sizeof(connection_t));
}
-void init_connections(void)
-{
- cp();
- connection_tree = avl_alloc_tree((avl_compare_t)connection_compare, NULL);
- cp();
- broadcast = new_connection();
- broadcast->name = xstrdup(_("everyone"));
- broadcast->hostname = xstrdup(_("BROADCAST"));
- cp();
+#ifndef DISABLE_LEGACY
+bool init_crypto_by_nid(legacy_crypto_t *c, nid_t cipher, nid_t digest) {
+ if(!cipher_open_by_nid(&c->cipher, cipher)) {
+ return false;
+ }
+
+ if(!digest_open_by_nid(&c->digest, digest, DIGEST_ALGO_SIZE)) {
+ cipher_close(&c->cipher);
+ return false;
+ }
+
+ c->budget = cipher_budget(&c->cipher);
+ return true;
}
-void exit_connections(void)
-{
- cp();
- avl_delete_tree(connection_tree);
- cp();
- free_connection(broadcast);
- cp();
+bool init_crypto_by_name(legacy_crypto_t *c, const char *cipher, const char *digest) {
+ if(!cipher_open_by_name(&c->cipher, cipher)) {
+ return false;
+ }
+
+ if(!digest_open_by_name(&c->digest, digest, DIGEST_ALGO_SIZE)) {
+ cipher_close(&c->cipher);
+ return false;
+ }
+
+ c->budget = cipher_budget(&c->cipher);
+ return true;
}
-connection_t *new_connection(void)
-{
- connection_t *c;
- cp();
- c = (connection_t *)xmalloc_and_zero(sizeof(connection_t));
+bool decrease_budget(legacy_crypto_t *c, size_t bytes) {
+ if(bytes > c->budget) {
+ return false;
+ } else {
+ c->budget -= bytes;
+ return true;
+ }
+}
- if(!c)
- return NULL;
+static void close_legacy_crypto(legacy_crypto_t *c) {
+ cipher_close(&c->cipher);
+ digest_close(&c->digest);
+}
- gettimeofday(&c->start, NULL);
- cp();
- return c;
+legacy_ctx_t *new_legacy_ctx(rsa_t *rsa) {
+ legacy_ctx_t *ctx = xzalloc(sizeof(legacy_ctx_t));
+ ctx->rsa = rsa;
+ return ctx;
}
-void free_connection(connection_t *c)
-{
- cp();
- if(c->hostname)
- free(c->hostname);
- if(c->inkey)
- free(c->inkey);
- if(c->outkey)
- free(c->outkey);
- if(c->mychallenge)
- free(c->mychallenge);
- if(c->hischallenge)
- free(c->hischallenge);
- free(c);
- cp();
+void free_legacy_ctx(legacy_ctx_t *ctx) {
+ if(ctx) {
+ close_legacy_crypto(&ctx->in);
+ close_legacy_crypto(&ctx->out);
+ rsa_free(ctx->rsa);
+ free(ctx);
+ }
}
+#endif
+
+void free_connection(connection_t *c) {
+ if(!c) {
+ return;
+ }
+
+#ifndef DISABLE_LEGACY
+ free_legacy_ctx(c->legacy);
+#endif
+
+ sptps_stop(&c->sptps);
+ ecdsa_free(c->ecdsa);
+
+ free(c->hischallenge);
+ free(c->mychallenge);
-void connection_add(connection_t *c)
-{
- cp();
- avl_insert(connection_tree, c);
- cp();
+ buffer_clear(&c->inbuf);
+ buffer_clear(&c->outbuf);
+
+ io_del(&c->io);
+
+ if(c->socket > 0) {
+ if(c->status.tarpit) {
+ tarpit(c->socket);
+ } else {
+ closesocket(c->socket);
+ }
+ }
+
+ free(c->name);
+ free(c->hostname);
+
+ if(c->config_tree) {
+ exit_configuration(c->config_tree);
+ c->config_tree = NULL;
+ }
+
+ free(c);
}
-void connection_del(connection_t *c)
-{
- cp();
- avl_delete(connection_tree, c);
- cp();
+void connection_add(connection_t *c) {
+ list_insert_tail(&connection_list, c);
}
-void dump_connections(void)
-{
- avl_node_t *node;
- connection_t *c;
- cp();
- syslog(LOG_DEBUG, _("Connections:"));
-
- for(node = connection_tree->head; node; node = node->next)
- {
- c = (connection_t *)node->data;
- syslog(LOG_DEBUG, _(" %s at %s options %lx socket %d status %04x"),
- c->name, c->hostname, c->options, c->socket, c->status);
- }
-
- syslog(LOG_DEBUG, _("End of connections."));
- cp();
+void connection_del(connection_t *c) {
+ list_delete(&connection_list, c);
}
-int read_connection_config(connection_t *c)
-{
- char *fname;
- int x;
- cp();
- asprintf(&fname, "%s/hosts/%s", confbase, c->name);
- x = read_config_file(c->config_tree, fname);
- free(fname);
- cp();
- return x;
+bool dump_connections(connection_t *cdump) {
+ for list_each(connection_t, c, &connection_list) {
+ send_request(cdump, "%d %d %s %s %x %d %x",
+ CONTROL, REQ_DUMP_CONNECTIONS,
+ c->name, c->hostname, c->options, c->socket,
+ c->status.value);
+ }
+
+ return send_request(cdump, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
}