/*
protocol_misc.c -- handle the meta-protocol, miscellaneous functions
- Copyright (C) 1999-2003 Ivo Timmermans <ivo@o2w.nl>,
- 2000-2003 Guus Sliepen <guus@sliepen.eu.org>
+ 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 1.1.4.11 2003/07/17 15:06:26 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 "system.h"
#include "protocol.h"
#include "utils.h"
-/* Status and error notification routines */
-
-int send_status(connection_t *c, int statusno, char *statusstring)
-{
- cp();
-
- if(!statusstring)
- statusstring = "Status";
-
- return send_request(c, "%d %d %s", STATUS, statusno, statusstring);
-}
-
-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) {
- logger(LOG_ERR, _("Got bad %s from %s (%s)"), "STATUS",
- c->name, c->hostname);
- return -1;
- }
-
- ifdebug(STATUS) logger(LOG_NOTICE, _("Status message from %s (%s): %d: %s"),
- c->name, c->hostname, statusno, statusstring);
-
- return 0;
-}
-
-int send_error(connection_t *c, int err, char *errstring)
-{
- cp();
-
- if(!errstring)
- errstring = "Error";
-
- return send_request(c, "%d %d %s", ERROR, err, errstring);
-}
-
-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) {
- logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ERROR",
- c->name, c->hostname);
- return -1;
- }
-
- ifdebug(ERROR) logger(LOG_NOTICE, _("Error message from %s (%s): %d: %s"),
- c->name, c->hostname, err, errorstring);
-
- terminate_connection(c, c->status.active);
+int maxoutbufsize = 0;
- return 0;
-}
-
-int send_termreq(connection_t *c)
-{
- cp();
-
- return send_request(c, "%d", TERMREQ);
-}
-
-int termreq_h(connection_t *c)
-{
- cp();
-
- terminate_connection(c, c->status.active);
-
- return 0;
-}
-
-int send_ping(connection_t *c)
-{
- cp();
-
- c->status.pinged = 1;
+bool send_ping(connection_t *c) {
+ c->status.pinged = true;
c->last_ping_time = now;
return send_request(c, "%d", PING);
}
-int ping_h(connection_t *c)
-{
- cp();
-
+bool ping_h(connection_t *c) {
return send_pong(c);
}
-int send_pong(connection_t *c)
-{
- cp();
-
+bool send_pong(connection_t *c) {
return send_request(c, "%d", PONG);
}
-int pong_h(connection_t *c)
-{
- cp();
-
- c->status.pinged = 0;
+bool pong_h(connection_t *c) {
+ c->status.pinged = false;
- /* Succesful connection, reset timeout if this is an outgoing connection. */
+ /* Successful connection, reset timeout if this is an outgoing connection. */
- if(c->outgoing)
+ if(c->outgoing) {
c->outgoing->timeout = 0;
+ c->outgoing->cfg = NULL;
- return 0;
-}
+ if(c->outgoing->ai) {
+ freeaddrinfo(c->outgoing->ai);
+ }
-/* Sending and receiving packets via TCP */
+ c->outgoing->ai = NULL;
+ c->outgoing->aip = NULL;
+ }
-int send_tcppacket(connection_t *c, vpn_packet_t *packet)
-{
- int x;
+ return true;
+}
- cp();
+/* Sending and receiving packets via TCP */
- /* 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;
+ if(!send_request(c, "%d %hd", PACKET, packet->len)) {
+ return false;
+ }
- return send_meta(c, packet->data, packet->len);
+ return send_meta(c, (char *)packet->data, packet->len) && flush_meta(c);
}
-int tcppacket_h(connection_t *c)
-{
- short int len;
-
- cp();
+bool tcppacket_h(connection_t *c) {
+ length_t len;
- if(sscanf(c->buffer, "%*d %hd", &len) != 1) {
- logger(LOG_ERR, _("Got bad %s from %s (%s)"), "PACKET", c->name,
- c->hostname);
- return -1;
+ if(sscanf(c->buffer, "%*d %hu", &len) != 1) {
+ logger(LOG_ERR, "Got bad %s from %s (%s)", "PACKET", c->name,
+ c->hostname);
+ return false;
}
/* Set reqlen to len, this will tell receive_meta() that a tcppacket is coming. */
c->tcplen = len;
- return 0;
+ return true;
}
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