/*
protocol_misc.c -- handle the meta-protocol, miscellaneous functions
Copyright (C) 1999-2005 Ivo Timmermans,
- 2000-2013 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2022 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
#include "system.h"
-#include "conf.h"
+#include "address_cache.h"
#include "connection.h"
+#include "crypto.h"
#include "logger.h"
#include "meta.h"
#include "net.h"
#include "netutl.h"
#include "protocol.h"
#include "utils.h"
-#include "xalloc.h"
-
-#ifndef MIN
-#define MIN(x, y) (((x)<(y))?(x):(y))
-#endif
int maxoutbufsize = 0;
int mtu_info_interval = 5;
int udp_info_interval = 5;
-/* Status and error notification routines */
-
-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);
-}
-
-bool status_h(connection_t *c, const char *request) {
- int statusno;
- char statusstring[MAX_STRING_SIZE];
-
- if(sscanf(request, "%*d %d " MAX_STRING, &statusno, statusstring) != 2) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "STATUS",
- c->name, c->hostname);
- return false;
- }
-
- logger(DEBUG_STATUS, LOG_NOTICE, "Status message from %s (%s): %d: %s",
- c->name, c->hostname, statusno, statusstring);
-
- return true;
-}
-
-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);
-}
-
-bool error_h(connection_t *c, const char *request) {
- int err;
- char errorstring[MAX_STRING_SIZE];
-
- if(sscanf(request, "%*d %d " MAX_STRING, &err, errorstring) != 2) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "ERROR",
- c->name, c->hostname);
- return false;
- }
-
- logger(DEBUG_ERROR, LOG_NOTICE, "Error message from %s (%s): %d: %s",
- c->name, c->hostname, err, errorstring);
-
- return false;
-}
-
bool send_termreq(connection_t *c) {
return send_request(c, "%d", TERMREQ);
}
bool termreq_h(connection_t *c, const char *request) {
+ (void)c;
+ (void)request;
return false;
}
}
bool ping_h(connection_t *c, const char *request) {
+ (void)request;
return send_pong(c);
}
}
bool pong_h(connection_t *c, const char *request) {
+ (void)request;
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) {
c->outgoing->timeout = 0;
- c->outgoing->cfg = NULL;
+ reset_address_cache(c->outgoing->node->address_cache, &c->address);
+ }
- if(c->outgoing->ai) {
- freeaddrinfo(c->outgoing->ai);
- }
+ return true;
+}
- c->outgoing->ai = NULL;
- c->outgoing->aip = NULL;
+static bool random_early_drop(connection_t *c) {
+ if(c->outbuf.len > (size_t)maxoutbufsize / 2) {
+ if((c->outbuf.len - (size_t)maxoutbufsize / 2) > prng((size_t)maxoutbufsize / 2)) {
+ return true;
+ }
}
- return true;
+ return false;
}
/* Sending and receiving packets via TCP */
/* If there already is a lot of data in the outbuf buffer, discard this packet.
We use a very simple Random Early Drop algorithm. */
- if(2.0 * c->outbuf.len / (float)maxoutbufsize - 1 > (float)rand() / (float)RAND_MAX) {
+ if(random_early_drop(c)) {
return true;
}
return false;
}
- return send_meta(c, (char *)DATA(packet), packet->len);
+ return send_meta(c, DATA(packet), packet->len);
}
bool tcppacket_h(connection_t *c, const char *request) {
return true;
}
-bool send_sptps_tcppacket(connection_t *c, const char *packet, int len) {
+bool send_sptps_tcppacket(connection_t *c, const void *packet, size_t len) {
/* If there already is a lot of data in the outbuf buffer, discard this packet.
We use a very simple Random Early Drop algorithm. */
- if(2.0 * c->outbuf.len / (float)maxoutbufsize - 1 > (float)rand() / (float)RAND_MAX) {
+ if(random_early_drop(c)) {
return true;
}
- if(!send_request(c, "%d %d", SPTPS_PACKET, len)) {
+ if(!send_request(c, "%d %lu", SPTPS_PACKET, (unsigned long)len)) {
return false;
}