/*
route.c -- routing
- Copyright (C) 2000-2005 Ivo Timmermans <ivo@tinc-vpn.org>,
- 2000-2005 Guus Sliepen <guus@tinc-vpn.org>
+ Copyright (C) 2000-2005 Ivo Timmermans,
+ 2000-2006 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 "avl_tree.h"
+#include "splay_tree.h"
#include "connection.h"
#include "ethernet.h"
#include "ipv4.h"
static const size_t ns_size = sizeof(struct nd_neighbor_solicit);
static const size_t opt_size = sizeof(struct nd_opt_hdr);
+static struct event age_subnets_event;
+
/* RFC 1071 */
static uint16_t inet_checksum(void *data, int len, uint16_t prevsum)
static bool ratelimit(int frequency) {
static time_t lasttime = 0;
static int count = 0;
+ time_t now = time(NULL);
if(lasttime == now) {
if(++count > frequency)
return true;
}
+static void age_subnets(int fd, short events, void *data)
+{
+ subnet_t *s;
+ connection_t *c;
+ splay_node_t *node, *next, *node2;
+ bool left = false;
+ time_t now = time(NULL);
+
+ cp();
+
+ for(node = myself->subnet_tree->head; node; node = next) {
+ next = node->next;
+ s = node->data;
+ if(s->expires && s->expires < now) {
+ ifdebug(TRAFFIC) {
+ char netstr[MAXNETSTR];
+ if(net2str(netstr, sizeof netstr, s))
+ logger(LOG_INFO, _("Subnet %s expired"), netstr);
+ }
+
+ for(node2 = connection_tree->head; node2; node2 = node2->next) {
+ c = node2->data;
+ if(c->status.active)
+ send_del_subnet(c, s);
+ }
+
+ subnet_del(myself, s);
+ } else {
+ if(s->expires)
+ left = true;
+ }
+ }
+
+ if(left)
+ event_add(&age_subnets_event, &(struct timeval){10, 0});
+}
+
static void learn_mac(mac_t *address)
{
subnet_t *subnet;
- avl_node_t *node;
+ splay_node_t *node;
connection_t *c;
cp();
subnet = new_subnet();
subnet->type = SUBNET_MAC;
- subnet->expires = now + macexpire;
+ subnet->expires = time(NULL) + macexpire;
subnet->net.mac.address = *address;
subnet_add(myself, subnet);
if(c->status.active)
send_add_subnet(c, subnet);
}
- }
-
- if(subnet->expires)
- subnet->expires = now + macexpire;
-}
-
-void age_subnets(void)
-{
- subnet_t *s;
- connection_t *c;
- avl_node_t *node, *next, *node2;
-
- cp();
-
- for(node = myself->subnet_tree->head; node; node = next) {
- next = node->next;
- s = node->data;
- if(s->expires && s->expires < now) {
- ifdebug(TRAFFIC) {
- char netstr[MAXNETSTR];
- if(net2str(netstr, sizeof netstr, s))
- logger(LOG_INFO, _("Subnet %s expired"), netstr);
- }
- for(node2 = connection_tree->head; node2; node2 = node2->next) {
- c = node2->data;
- if(c->status.active)
- send_del_subnet(c, s);
- }
-
- subnet_del(myself, s);
- }
+ if(!timeout_initialized(&age_subnets_event))
+ timeout_set(&age_subnets_event, age_subnets, NULL);
+ event_add(&age_subnets_event, &(struct timeval){10, 0});
+ } else {
+ if(subnet->expires)
+ subnet->expires = time(NULL) + macexpire;
}
}
static void route_mac(node_t *source, vpn_packet_t *packet)
{
subnet_t *subnet;
+ mac_t dest;
cp();
+
/* Learn source address */
- if(source == myself)
- learn_mac((mac_t *)(&packet->data[6]));
+ if(source == myself) {
+ mac_t src;
+ memcpy(&src, &packet->data[6], sizeof src);
+ learn_mac(&src);
+ }
/* Lookup destination address */
- subnet = lookup_subnet_mac((mac_t *)(&packet->data[0]));
+ memcpy(&dest, &packet->data[0], sizeof dest);
+ subnet = lookup_subnet_mac(&dest);
if(!subnet) {
broadcast_packet(source, packet);
todo = ntohs(ip.ip_len) - ip_size;
if(ether_size + ip_size + todo != packet->len) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Length of packet (%d) doesn't match length in IPv4 header (%d)"), packet->len, ether_size + ip_size + todo);
+ ifdebug(TRAFFIC) logger(LOG_WARNING, _("Length of packet (%d) doesn't match length in IPv4 header (%zd)"), packet->len, ether_size + ip_size + todo);
return;
}
{
subnet_t *subnet;
node_t *via;
+ ipv4_t dest;
cp();
- subnet = lookup_subnet_ipv4((ipv4_t *) &packet->data[30]);
+ memcpy(&dest, &packet->data[30], sizeof dest);
+ subnet = lookup_subnet_ipv4(&dest);
if(!subnet) {
ifdebug(TRAFFIC) logger(LOG_WARNING, _("Cannot route packet from %s (%s): unknown IPv4 destination address %d.%d.%d.%d"),
source->name, source->hostname,
- packet->data[30],
- packet->data[31],
- packet->data[32],
- packet->data[33]);
+ dest.x[0],
+ dest.x[1],
+ dest.x[2],
+ dest.x[3]);
route_ipv4_unreachable(source, packet, ICMP_DEST_UNREACH, ICMP_NET_UNKNOWN);
return;
{
subnet_t *subnet;
node_t *via;
+ ipv6_t dest;
cp();
- subnet = lookup_subnet_ipv6((ipv6_t *) &packet->data[38]);
+ memcpy(&dest, &packet->data[38], sizeof dest);
+ subnet = lookup_subnet_ipv6(&dest);
if(!subnet) {
ifdebug(TRAFFIC) logger(LOG_WARNING, _("Cannot route packet from %s (%s): unknown IPv6 destination address %hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx"),
source->name, source->hostname,
- ntohs(*(uint16_t *) &packet->data[38]),
- ntohs(*(uint16_t *) &packet->data[40]),
- ntohs(*(uint16_t *) &packet->data[42]),
- ntohs(*(uint16_t *) &packet->data[44]),
- ntohs(*(uint16_t *) &packet->data[46]),
- ntohs(*(uint16_t *) &packet->data[48]),
- ntohs(*(uint16_t *) &packet->data[50]),
- ntohs(*(uint16_t *) &packet->data[52]));
+ ntohs(dest.x[0]),
+ ntohs(dest.x[1]),
+ ntohs(dest.x[2]),
+ ntohs(dest.x[3]),
+ ntohs(dest.x[4]),
+ ntohs(dest.x[5]),
+ ntohs(dest.x[6]),
+ ntohs(dest.x[7]));
route_ipv6_unreachable(source, packet, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR);
return;
projects / tinc / blobdiff