/*
protocol_misc.c -- handle the meta-protocol, miscellaneous functions
- Copyright (C) 1999-2002 Ivo Timmermans <ivo@o2w.nl>,
- 2000-2002 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 1.1.4.8 2003/07/06 22:11:33 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 <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 "logger.h"
+#include "utils.h"
-#include "system.h"
+int maxoutbufsize = 0;
/* Status and error notification routines */
-int send_status(connection_t *c, int statusno, char *statusstring)
-{
- cp();
-
+bool send_status(connection_t *c, int statusno, const char *statusstring) {
if(!statusstring)
- statusstring = status_text[statusno];
+ statusstring = "Status";
return send_request(c, "%d %d %s", STATUS, statusno, statusstring);
}
-int status_h(connection_t *c)
-{
+bool 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(DEBUG_ALWAYS, LOG_ERR, _("Got bad %s from %s (%s)"), "STATUS",
+ logger(LOG_ERR, "Got bad %s from %s (%s)", "STATUS",
c->name, c->hostname);
- return -1;
+ return false;
}
- logger(DEBUG_STATUS, LOG_NOTICE, _("Status message from %s (%s): %s: %s"),
- c->name, c->hostname, status_text[statusno], statusstring);
+ ifdebug(STATUS) logger(LOG_NOTICE, "Status message from %s (%s): %d: %s",
+ c->name, c->hostname, statusno, statusstring);
- return 0;
+ return true;
}
-int send_error(connection_t *c, int err, char *errstring)
-{
- cp();
-
+bool send_error(connection_t *c, int err, const char *errstring) {
if(!errstring)
- errstring = strerror(err);
+ errstring = "Error";
return send_request(c, "%d %d %s", ERROR, err, errstring);
}
-int error_h(connection_t *c)
-{
+bool 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(DEBUG_ALWAYS, LOG_ERR, _("Got bad %s from %s (%s)"), "ERROR",
+ logger(LOG_ERR, "Got bad %s from %s (%s)", "ERROR",
c->name, c->hostname);
- return -1;
+ return false;
}
- logger(DEBUG_ERROR, LOG_NOTICE, _("Error message from %s (%s): %s: %s"),
- c->name, c->hostname, strerror(err), errorstring);
+ ifdebug(ERROR) logger(LOG_NOTICE, "Error message from %s (%s): %d: %s",
+ c->name, c->hostname, err, errorstring);
terminate_connection(c, c->status.active);
- return 0;
+ return true;
}
-int send_termreq(connection_t *c)
-{
- cp();
-
+bool send_termreq(connection_t *c) {
return send_request(c, "%d", TERMREQ);
}
-int termreq_h(connection_t *c)
-{
- cp();
-
+bool termreq_h(connection_t *c) {
terminate_connection(c, c->status.active);
- return 0;
+ return true;
}
-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. */
- if(c->outgoing)
+ if(c->outgoing) {
c->outgoing->timeout = 0;
+ c->outgoing->cfg = NULL;
+ if(c->outgoing->ai)
+ freeaddrinfo(c->outgoing->ai);
+ c->outgoing->ai = NULL;
+ c->outgoing->aip = NULL;
+ }
- return 0;
+ return true;
}
/* Sending and receiving packets via TCP */
-int send_tcppacket(connection_t *c, vpn_packet_t *packet)
-{
- int x;
+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. */
- cp();
+ if(2.0 * c->outbuflen / (float)maxoutbufsize - 1 > (float)rand()/(float)RAND_MAX)
+ return true;
- /* Evil hack. */
+ if(!send_request(c, "%d %hd", PACKET, packet->len))
+ return false;
- x = send_request(c, "%d %hd", PACKET, packet->len);
-
- if(x)
- return x;
-
- 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)
-{
+bool tcppacket_h(connection_t *c) {
short int len;
- cp();
-
if(sscanf(c->buffer, "%*d %hd", &len) != 1) {
- logger(DEBUG_ALWAYS, LOG_ERR, _("Got bad %s from %s (%s)"), "PACKET", c->name,
+ logger(LOG_ERR, "Got bad %s from %s (%s)", "PACKET", c->name,
c->hostname);
- return -1;
+ return false;
}
/* Set reqlen to len, this will tell receive_meta() that a tcppacket is coming. */
c->tcplen = len;
- return 0;
+ return true;
}
-
-/* Status strings */
-
-char (*status_text[]) = {
- "Warning",
-};
-
-/* Error strings */
-
-char (*error_text[]) = {
- "Error",
-};
projects / tinc / blobdiff