/*
protocol_misc.c -- handle the meta-protocol, miscellaneous functions
- Copyright (C) 1999-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
- 2000-2002 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 1999-2005 Ivo Timmermans,
+ 2000-2012 Guus Sliepen <guus@tinc-vpn.org>
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: protocol_misc.c,v 1.1.4.1 2002/02/11 10:05:58 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 <stdlib.h>
-#include <string.h>
-#include <syslog.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <errno.h>
-
-#include <utils.h>
+#include "system.h"
#include "conf.h"
+#include "connection.h"
+#include "logger.h"
+#include "meta.h"
#include "net.h"
#include "netutl.h"
#include "protocol.h"
-#include "meta.h"
-#include "connection.h"
+#include "utils.h"
-#include "system.h"
+int maxoutbufsize = 0;
-/* Status and error notification routines */
+bool send_ping(connection_t *c) {
+ c->status.pinged = true;
+ c->last_ping_time = now;
-int send_status(connection_t *c, int statusno, char *statusstring)
-{
-cp
- if(!statusstring)
- statusstring = status_text[statusno];
-cp
- return send_request(c, "%d %d %s", STATUS, statusno, statusstring);
+ return send_request(c, "%d", PING);
}
-int status_h(connection_t *c)
-{
- int statusno;
- char statusstring[MAX_STRING_SIZE];
-cp
- if(sscanf(c->buffer, "%*d %d "MAX_STRING, &statusno, statusstring) != 2)
- {
- syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "STATUS",
- c->name, c->hostname);
- return -1;
- }
-
- if(debug_lvl >= DEBUG_STATUS)
- {
- syslog(LOG_NOTICE, _("Status message from %s (%s): %s: %s"),
- c->name, c->hostname, status_text[statusno], statusstring);
- }
-
-cp
- return 0;
+bool ping_h(connection_t *c) {
+ return send_pong(c);
}
-int send_error(connection_t *c, int err, char *errstring)
-{
-cp
- if(!errstring)
- errstring = strerror(err);
- return send_request(c, "%d %d %s", ERROR, err, errstring);
+bool send_pong(connection_t *c) {
+ return send_request(c, "%d", PONG);
}
-int error_h(connection_t *c)
-{
- int err;
- char errorstring[MAX_STRING_SIZE];
-cp
- if(sscanf(c->buffer, "%*d %d "MAX_STRING, &err, errorstring) != 2)
- {
- syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ERROR",
- c->name, c->hostname);
- return -1;
- }
-
- if(debug_lvl >= DEBUG_ERROR)
- {
- syslog(LOG_NOTICE, _("Error message from %s (%s): %s: %s"),
- c->name, c->hostname, strerror(err), errorstring);
- }
-
- terminate_connection(c, c->status.active);
-cp
- return 0;
-}
+bool pong_h(connection_t *c) {
+ c->status.pinged = false;
-int send_termreq(connection_t *c)
-{
-cp
- return send_request(c, "%d", TERMREQ);
-}
+ /* Succesful connection, reset timeout if this is an outgoing connection. */
-int termreq_h(connection_t *c)
-{
-cp
- terminate_connection(c, c->status.active);
-cp
- return 0;
-}
+ if(c->outgoing) {
+ c->outgoing->timeout = 0;
+ c->outgoing->cfg = NULL;
-int send_ping(connection_t *c)
-{
-cp
- c->status.pinged = 1;
- c->last_ping_time = time(NULL);
-cp
- return send_request(c, "%d", PING);
-}
+ if(c->outgoing->ai) {
+ freeaddrinfo(c->outgoing->ai);
+ }
-int ping_h(connection_t *c)
-{
-cp
- return send_pong(c);
-}
+ c->outgoing->ai = NULL;
+ c->outgoing->aip = NULL;
+ }
-int send_pong(connection_t *c)
-{
-cp
- return send_request(c, "%d", PONG);
-}
-
-int pong_h(connection_t *c)
-{
-cp
- c->status.pinged = 0;
-cp
- return 0;
+ return true;
}
/* Sending and receiving packets via TCP */
-int send_tcppacket(connection_t *c, vpn_packet_t *packet)
-{
- int x;
-cp
- /* Evil hack. */
+bool send_tcppacket(connection_t *c, const vpn_packet_t *packet) {
+ /* If there already is a lot of data in the outbuf buffer, discard this packet.
+ We use a very simple Random Early Drop algorithm. */
- x = send_request(c, "%d %hd", PACKET, packet->len);
+ if(2.0 * c->outbuflen / (float)maxoutbufsize - 1 > (float)rand() / (float)RAND_MAX) {
+ return true;
+ }
- if(x)
- return x;
-cp
- return send_meta(c, packet->data, packet->len);
-}
+ if(!send_request(c, "%d %hd", PACKET, packet->len)) {
+ return false;
+ }
-int tcppacket_h(connection_t *c)
-{
- short int len;
-cp
- if(sscanf(c->buffer, "%*d %hd", &len) != 1)
- {
- syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "PACKET", c->name, c->hostname);
- return -1;
- }
-
- /* Set reqlen to len, this will tell receive_meta() that a tcppacket is coming. */
-
- c->tcplen = len;
-cp
- return 0;
+ return send_meta(c, (char *)packet->data, packet->len) && flush_meta(c);
}
-/* Status strings */
+bool tcppacket_h(connection_t *c) {
+ length_t len;
-char (*status_text[]) = {
- "Warning",
-};
+ if(sscanf(c->buffer, "%*d %hu", &len) != 1) {
+ logger(LOG_ERR, "Got bad %s from %s (%s)", "PACKET", c->name,
+ c->hostname);
+ return false;
+ }
-/* Error strings */
+ /* Set reqlen to len, this will tell receive_meta() that a tcppacket is coming. */
-char (*error_text[]) = {
- "Error",
-};
+ c->tcplen = len;
+
+ return true;
+}
projects / oweals / tinc.git / blobdiff