tinc/src/protocol_misc.c

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/*
protocol_misc.c -- handle the meta-protocol, miscellaneous functions
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Copyright (C) 1999-2005 Ivo Timmermans <ivo@tinc-vpn.org>,
2000-2005 Guus Sliepen <guus@tinc-vpn.org>
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id$
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*/
#include "system.h"
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#include "conf.h"
#include "connection.h"
#include "logger.h"
#include "meta.h"
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#include "net.h"
#include "netutl.h"
#include "protocol.h"
#include "utils.h"
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int maxoutbufsize = 0;
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/* Status and error notification routines */
bool send_status(connection_t *c, int statusno, const char *statusstring)
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{
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cp();
if(!statusstring)
statusstring = "Status";
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return send_request(c, "%d %d %s", STATUS, statusno, statusstring);
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}
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bool status_h(connection_t *c)
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{
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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",
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c->name, c->hostname);
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return false;
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}
ifdebug(STATUS) logger(LOG_NOTICE, _("Status message from %s (%s): %d: %s"),
c->name, c->hostname, statusno, statusstring);
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return true;
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}
bool send_error(connection_t *c, int err, const char *errstring)
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{
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cp();
if(!errstring)
errstring = "Error";
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return send_request(c, "%d %d %s", ERROR, err, errstring);
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}
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bool error_h(connection_t *c)
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{
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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",
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c->name, c->hostname);
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return false;
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}
ifdebug(ERROR) logger(LOG_NOTICE, _("Error message from %s (%s): %d: %s"),
c->name, c->hostname, err, errorstring);
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terminate_connection(c, c->status.active);
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return true;
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}
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bool send_termreq(connection_t *c)
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{
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cp();
return send_request(c, "%d", TERMREQ);
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}
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bool termreq_h(connection_t *c)
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{
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cp();
terminate_connection(c, c->status.active);
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return true;
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}
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bool send_ping(connection_t *c)
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{
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cp();
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c->status.pinged = true;
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c->last_ping_time = now;
return send_request(c, "%d", PING);
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}
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bool ping_h(connection_t *c)
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{
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cp();
return send_pong(c);
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}
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bool send_pong(connection_t *c)
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{
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cp();
return send_request(c, "%d", PONG);
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}
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bool pong_h(connection_t *c)
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{
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cp();
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c->status.pinged = false;
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/* Succesful connection, reset timeout if this is an outgoing connection. */
if(c->outgoing)
c->outgoing->timeout = 0;
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return true;
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}
/* Sending and receiving packets via TCP */
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bool send_tcppacket(connection_t *c, vpn_packet_t *packet)
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{
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cp();
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/* If there already is a lot of data in the outbuf buffer, discard this packet. */
if(c->outbuflen > maxoutbufsize)
return true;
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if(!send_request(c, "%d %hd", PACKET, packet->len))
return false;
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return send_meta(c, packet->data, packet->len);
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}
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bool tcppacket_h(connection_t *c)
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{
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short int len;
cp();
if(sscanf(c->buffer, "%*d %hd", &len) != 1) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "PACKET", c->name,
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c->hostname);
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return false;
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}
/* Set reqlen to len, this will tell receive_meta() that a tcppacket is coming. */
c->tcplen = len;
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return true;
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}