X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol_misc.c;h=22b204d9f2f3dcaabef9ab521e5418cf058ff383;hp=363c8c3f08e523f811d941c5b3e8d647b09d6654;hb=2116c6eb7d328c7aa3ce3da54f95367e5199d373;hpb=6f9f6779e6bd1dd7bb795b42dad550863a386ca8 diff --git a/src/protocol_misc.c b/src/protocol_misc.c index 363c8c3f..22b204d9 100644 --- a/src/protocol_misc.c +++ b/src/protocol_misc.c @@ -1,7 +1,7 @@ /* protocol_misc.c -- handle the meta-protocol, miscellaneous functions - Copyright (C) 1999-2002 Ivo Timmermans , - 2000-2002 Guus Sliepen + Copyright (C) 1999-2005 Ivo Timmermans, + 2000-2012 Guus Sliepen 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 @@ -13,198 +13,150 @@ 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 1.1.4.7 2002/09/09 22:33:04 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 -#include -#include -#include -#include -#include - -#include +#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 */ -int send_status(connection_t *c, int statusno, char *statusstring) -{ - cp(); - - if(!statusstring) - statusstring = status_text[statusno]; +bool send_status(connection_t *c, int statusno, const char *statusstring) { + if(!statusstring) { + 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) { - syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "STATUS", - c->name, c->hostname); - return -1; + logger(LOG_ERR, "Got bad %s from %s (%s)", "STATUS", + c->name, c->hostname); + return false; } - if(debug_lvl >= DEBUG_STATUS) { - syslog(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(); - - if(!errstring) - errstring = strerror(err); +bool send_error(connection_t *c, int err, const char *errstring) { + if(!errstring) { + 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) { - syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ERROR", - c->name, c->hostname); - return -1; + logger(LOG_ERR, "Got bad %s from %s (%s)", "ERROR", + c->name, c->hostname); + return false; } - if(debug_lvl >= DEBUG_ERROR) { - syslog(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; - 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) { - syslog(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; } - -/* Status strings */ - -char (*status_text[]) = { - "Warning", -}; - -/* Error strings */ - -char (*error_text[]) = { - "Error", -};