/*
route.c -- routing
- Copyright (C) 2000-2003 Ivo Timmermans <ivo@o2w.nl>,
- 2000-2003 Guus Sliepen <guus@sliepen.eu.org>
+ Copyright (C) 2000-2004 Ivo Timmermans <ivo@tinc-vpn.org>,
+ 2000-2004 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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: route.c,v 1.1.2.69 2003/12/08 12:00:40 guus Exp $
+ $Id$
*/
#include "system.h"
-#ifdef HAVE_NET_ETHERNET_H
-#include <net/ethernet.h>
-#endif
-#ifdef HAVE_NET_IF_ARP_H
-#include <net/if_arp.h>
-#endif
-#ifdef HAVE_NETINET_IP_ICMP_H
-#include <netinet/ip_icmp.h>
-#endif
-#ifdef HAVE_NETINET_ICMP6_H
-#include <netinet/icmp6.h>
-#endif
-#ifdef HAVE_NETINET_IF_ETHER_H
-#include <netinet/if_ether.h>
-#endif
-
#include "avl_tree.h"
#include "connection.h"
-#include "device.h"
#include "ethernet.h"
#include "ipv4.h"
#include "ipv6.h"
/* RFC 1071 */
-static uint16_t inet_checksum(void *data, int len, uint16_t prevsum)
+static __inline__ uint16_t inet_checksum(void *data, int len, uint16_t prevsum)
{
uint16_t *p = data;
uint32_t checksum = prevsum ^ 0xFFFF;
}
if(len)
- checksum += *(unsigned char *)p;
+ checksum += *(uint8_t *)p;
while(checksum >> 16)
checksum = (checksum & 0xFFFF) + (checksum >> 16);
return ~checksum;
}
-static bool ratelimit(int frequency) {
+static __inline__ bool ratelimit(int frequency) {
static time_t lasttime = 0;
static int count = 0;
return false;
}
+
+static __inline__ bool checklength(node_t *source, vpn_packet_t *packet, length_t length) {
+ if(packet->len < length) {
+ ifdebug(TRAFFIC) logger(LOG_WARNING, _("Got too short packet from %s (%s)"), source->name, source->hostname);
+ return false;
+ } else
+ return true;
+}
-static void learn_mac(mac_t *address)
+static __inline__ void learn_mac(mac_t *address)
{
subnet_t *subnet;
avl_node_t *node;
/* If we don't know this MAC address yet, store it */
- if(!subnet || subnet->owner != myself) {
+ if(!subnet) {
ifdebug(TRAFFIC) logger(LOG_INFO, _("Learned new MAC address %hx:%hx:%hx:%hx:%hx:%hx"),
address->x[0], address->x[1], address->x[2], address->x[3],
address->x[4], address->x[5]);
subnet = new_subnet();
subnet->type = SUBNET_MAC;
- memcpy(&subnet->net.mac.address, address, sizeof(mac_t));
+ subnet->expires = now + macexpire;
+ subnet->net.mac.address = *address;
subnet_add(myself, subnet);
/* And tell all other tinc daemons it's our MAC */
}
}
- subnet->net.mac.lastseen = now;
+ if(subnet->expires)
+ subnet->expires = now + macexpire;
}
-void age_mac(void)
+void age_subnets(void)
{
subnet_t *s;
connection_t *c;
for(node = myself->subnet_tree->head; node; node = next) {
next = node->next;
s = node->data;
- if(s->type == SUBNET_MAC && s->net.mac.lastseen && s->net.mac.lastseen + macexpire < now) {
- ifdebug(TRAFFIC) logger(LOG_INFO, _("MAC address %hx:%hx:%hx:%hx:%hx:%hx expired"),
- s->net.mac.address.x[0], s->net.mac.address.x[1],
- s->net.mac.address.x[2], s->net.mac.address.x[3],
- s->net.mac.address.x[4], s->net.mac.address.x[5]);
+ 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;
}
}
-static node_t *route_mac(vpn_packet_t *packet)
+static __inline__ void route_mac(node_t *source, vpn_packet_t *packet)
{
subnet_t *subnet;
/* Learn source address */
- learn_mac((mac_t *)(&packet->data[6]));
+ if(source == myself)
+ learn_mac((mac_t *)(&packet->data[6]));
/* Lookup destination address */
subnet = lookup_subnet_mac((mac_t *)(&packet->data[0]));
- if(subnet)
- return subnet->owner;
- else
- return NULL;
+ if(!subnet) {
+ broadcast_packet(source, packet);
+ return;
+ }
+
+ if(subnet->owner == source) {
+ ifdebug(TRAFFIC) logger(LOG_WARNING, _("Packet looping back to %s (%s)!"), source->name, source->hostname);
+ return;
+ }
+
+ send_packet(subnet->owner, packet);
}
/* RFC 792 */
-static void route_ipv4_unreachable(vpn_packet_t *packet, uint8_t code)
+static void route_ipv4_unreachable(node_t *source, vpn_packet_t *packet, uint8_t type, uint8_t code)
{
- struct ip ip;
- struct icmp icmp;
+ struct ip ip = {0};
+ struct icmp icmp = {0};
struct in_addr ip_src;
struct in_addr ip_dst;
/* Copy headers from packet into properly aligned structs on the stack */
memcpy(&ip, packet->data + ether_size, ip_size);
- memcpy(&icmp, packet->data + ether_size + ip_size, icmp_size);
/* Remember original source and destination */
-
- memcpy(&ip_src, &ip.ip_src, sizeof(ip_src));
- memcpy(&ip_dst, &ip.ip_dst, sizeof(ip_dst));
+
+ ip_src = ip.ip_src;
+ ip_dst = ip.ip_dst;
oldlen = packet->len - ether_size;
-
+
+ if(type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED)
+ icmp.icmp_nextmtu = htons(packet->len - ether_size);
+
if(oldlen >= IP_MSS - ip_size - icmp_size)
oldlen = IP_MSS - ip_size - icmp_size;
ip.ip_ttl = 255;
ip.ip_p = IPPROTO_ICMP;
ip.ip_sum = 0;
- memcpy(&ip.ip_src, &ip_dst, sizeof(ip_src));
- memcpy(&ip.ip_dst, &ip_src, sizeof(ip_dst));
+ ip.ip_src = ip_dst;
+ ip.ip_dst = ip_src;
ip.ip_sum = inet_checksum(&ip, ip_size, ~0);
/* Fill in ICMP header */
- icmp.icmp_type = ICMP_DEST_UNREACH;
+ icmp.icmp_type = type;
icmp.icmp_code = code;
icmp.icmp_cksum = 0;
memcpy(packet->data + ether_size + ip_size, &icmp, icmp_size);
packet->len = ether_size + ip_size + icmp_size + oldlen;
+
+ send_packet(source, packet);
+}
+
+/* RFC 791 */
+
+static __inline__ void fragment_ipv4_packet(node_t *dest, vpn_packet_t *packet) {
+ struct ip ip;
+ vpn_packet_t fragment;
+ int len, maxlen, todo;
+ uint8_t *offset;
+ uint16_t ip_off, origf;
+
+ cp();
+
+ memcpy(&ip, packet->data + ether_size, ip_size);
+ fragment.priority = packet->priority;
+
+ if(ip.ip_hl != ip_size / 4)
+ return;
+
+ 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);
+ return;
+ }
+
+ ifdebug(TRAFFIC) logger(LOG_INFO, _("Fragmenting packet of %d bytes to %s (%s)"), packet->len, dest->name, dest->hostname);
+
+ offset = packet->data + ether_size + ip_size;
+ maxlen = (dest->mtu - ether_size - ip_size) & ~0x7;
+ ip_off = ntohs(ip.ip_off);
+ origf = ip_off & ~IP_OFFMASK;
+ ip_off &= IP_OFFMASK;
- write_packet(packet);
+ while(todo) {
+ len = todo > maxlen ? maxlen : todo;
+ memcpy(fragment.data + ether_size + ip_size, offset, len);
+ todo -= len;
+ offset += len;
+
+ ip.ip_len = htons(ip_size + len);
+ ip.ip_off = htons(ip_off | origf | (todo ? IP_MF : 0));
+ ip.ip_sum = 0;
+ ip.ip_sum = inet_checksum(&ip, ip_size, ~0);
+ memcpy(fragment.data, packet->data, ether_size);
+ memcpy(fragment.data + ether_size, &ip, ip_size);
+ fragment.len = ether_size + ip_size + len;
+
+ send_packet(dest, &fragment);
+
+ ip_off += len / 8;
+ }
}
-static node_t *route_ipv4(vpn_packet_t *packet)
+static __inline__ void route_ipv4_unicast(node_t *source, vpn_packet_t *packet)
{
subnet_t *subnet;
+ node_t *via;
cp();
- if(priorityinheritance)
- packet->priority = packet->data[15];
-
subnet = lookup_subnet_ipv4((ipv4_t *) &packet->data[30]);
if(!subnet) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Cannot route packet: unknown IPv4 destination address %d.%d.%d.%d"),
- packet->data[30], packet->data[31], packet->data[32],
- packet->data[33]);
-
- route_ipv4_unreachable(packet, ICMP_NET_UNKNOWN);
- return NULL;
+ 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]);
+
+ route_ipv4_unreachable(source, packet, ICMP_DEST_UNREACH, ICMP_NET_UNKNOWN);
+ return;
}
+ if(subnet->owner == source) {
+ ifdebug(TRAFFIC) logger(LOG_WARNING, _("Packet looping back to %s (%s)!"), source->name, source->hostname);
+ return;
+ }
+
if(!subnet->owner->status.reachable)
- route_ipv4_unreachable(packet, ICMP_NET_UNREACH);
+ route_ipv4_unreachable(source, packet, ICMP_DEST_UNREACH, ICMP_NET_UNREACH);
+
+ if(priorityinheritance)
+ packet->priority = packet->data[15];
+
+ via = (subnet->owner->via == myself) ? subnet->owner->nexthop : subnet->owner->via;
+
+ if(via && packet->len > via->mtu && via != myself) {
+ ifdebug(TRAFFIC) logger(LOG_INFO, _("Packet for %s (%s) length %d larger than MTU %d"), subnet->owner->name, subnet->owner->hostname, packet->len, via->mtu);
+ if(packet->data[20] & 0x40) {
+ packet->len = via->mtu;
+ route_ipv4_unreachable(source, packet, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED);
+ } else {
+ fragment_ipv4_packet(via, packet);
+ }
- return subnet->owner;
+ return;
+ }
+
+ send_packet(subnet->owner, packet);
+}
+
+static __inline__ void route_ipv4(node_t *source, vpn_packet_t *packet)
+{
+ cp();
+
+ if(!checklength(source, packet, ether_size + ip_size))
+ return;
+
+ route_ipv4_unicast(source, packet);
}
/* RFC 2463 */
-static void route_ipv6_unreachable(vpn_packet_t *packet, uint8_t code)
+static void route_ipv6_unreachable(node_t *source, vpn_packet_t *packet, uint8_t type, uint8_t code)
{
struct ip6_hdr ip6;
- struct icmp6_hdr icmp6;
+ struct icmp6_hdr icmp6 = {0};
uint16_t checksum;
struct {
/* Copy headers from packet to structs on the stack */
memcpy(&ip6, packet->data + ether_size, ip6_size);
- memcpy(&icmp6, packet->data + ether_size + ip6_size, icmp6_size);
/* Remember original source and destination */
-
- memcpy(&pseudo.ip6_src, &ip6.ip6_dst, sizeof(ip6.ip6_src));
- memcpy(&pseudo.ip6_dst, &ip6.ip6_src, sizeof(ip6.ip6_dst));
+
+ pseudo.ip6_src = ip6.ip6_dst;
+ pseudo.ip6_dst = ip6.ip6_src;
+
+ pseudo.length = packet->len - ether_size;
- pseudo.length = ntohs(ip6.ip6_plen) + ip6_size;
+ if(type == ICMP6_PACKET_TOO_BIG)
+ icmp6.icmp6_mtu = htonl(pseudo.length);
if(pseudo.length >= IP_MSS - ip6_size - icmp6_size)
pseudo.length = IP_MSS - ip6_size - icmp6_size;
ip6.ip6_plen = htons(icmp6_size + pseudo.length);
ip6.ip6_nxt = IPPROTO_ICMPV6;
ip6.ip6_hlim = 255;
- memcpy(&ip6.ip6_src, &pseudo.ip6_src, sizeof(ip6.ip6_src));
- memcpy(&ip6.ip6_dst, &pseudo.ip6_dst, sizeof(ip6.ip6_dst));
+ ip6.ip6_src = pseudo.ip6_src;
+ ip6.ip6_dst = pseudo.ip6_dst;
/* Fill in ICMP header */
- icmp6.icmp6_type = ICMP6_DST_UNREACH;
+ icmp6.icmp6_type = type;
icmp6.icmp6_code = code;
icmp6.icmp6_cksum = 0;
packet->len = ether_size + ip6_size + ntohl(pseudo.length);
- write_packet(packet);
+ send_packet(source, packet);
}
-static node_t *route_ipv6(vpn_packet_t *packet)
+static __inline__ void route_ipv6_unicast(node_t *source, vpn_packet_t *packet)
{
subnet_t *subnet;
+ node_t *via;
cp();
subnet = lookup_subnet_ipv6((ipv6_t *) &packet->data[38]);
if(!subnet) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Cannot route packet: unknown IPv6 destination address %hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx"),
- 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]));
- route_ipv6_unreachable(packet, ICMP6_DST_UNREACH_ADDR);
-
- return NULL;
+ 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]));
+
+ route_ipv6_unreachable(source, packet, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR);
+ return;
+ }
+
+ if(subnet->owner == source) {
+ ifdebug(TRAFFIC) logger(LOG_WARNING, _("Packet looping back to %s (%s)!"), source->name, source->hostname);
+ return;
}
if(!subnet->owner->status.reachable)
- route_ipv6_unreachable(packet, ICMP6_DST_UNREACH_NOROUTE);
+ route_ipv6_unreachable(source, packet, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE);
+
+ via = (subnet->owner->via == myself) ? subnet->owner->nexthop : subnet->owner->via;
- return subnet->owner;
+ if(via && packet->len > via->mtu && via != myself) {
+ ifdebug(TRAFFIC) logger(LOG_INFO, _("Packet for %s (%s) length %d larger than MTU %d"), subnet->owner->name, subnet->owner->hostname, packet->len, via->mtu);
+ packet->len = via->mtu;
+ route_ipv6_unreachable(source, packet, ICMP6_PACKET_TOO_BIG, 0);
+ return;
+ }
+
+ send_packet(subnet->owner, packet);
}
/* RFC 2461 */
-static void route_neighborsol(vpn_packet_t *packet)
+static void route_neighborsol(node_t *source, vpn_packet_t *packet)
{
struct ip6_hdr ip6;
struct nd_neighbor_solicit ns;
cp();
+ if(!checklength(source, packet, ether_size + ip6_size + ns_size + opt_size + ETH_ALEN))
+ return;
+
+ if(source != myself) {
+ ifdebug(TRAFFIC) logger(LOG_WARNING, _("Got neighbor solicitation request from %s (%s) while in router mode!"), source->name, source->hostname);
+ return;
+ }
+
/* Copy headers from packet to structs on the stack */
memcpy(&ip6, packet->data + ether_size, ip6_size);
/* Create pseudo header */
- memcpy(&pseudo.ip6_src, &ip6.ip6_src, sizeof(ip6.ip6_src));
- memcpy(&pseudo.ip6_dst, &ip6.ip6_dst, sizeof(ip6.ip6_dst));
+ pseudo.ip6_src = ip6.ip6_src;
+ pseudo.ip6_dst = ip6.ip6_dst;
pseudo.length = htonl(ns_size + opt_size + ETH_ALEN);
pseudo.next = htonl(IPPROTO_ICMPV6);
memcpy(packet->data, packet->data + ETH_ALEN, ETH_ALEN); /* copy destination address */
packet->data[ETH_ALEN * 2 - 1] ^= 0xFF; /* mangle source address so it looks like it's not from us */
- memcpy(&ip6.ip6_dst, &ip6.ip6_src, sizeof(ip6.ip6_dst)); /* ... */
- memcpy(&ip6.ip6_src, &ns.nd_ns_target, sizeof(ip6.ip6_src)); /* swap destination and source protocol address */
+ ip6.ip6_dst = ip6.ip6_src; /* swap destination and source protocoll address */
+ ip6.ip6_src = ns.nd_ns_target;
memcpy(packet->data + ether_size + ip6_size + ns_size + opt_size, packet->data + ETH_ALEN, ETH_ALEN); /* add fake source hard addr */
/* Create pseudo header */
- memcpy(&pseudo.ip6_src, &ip6.ip6_src, sizeof(ip6.ip6_src));
- memcpy(&pseudo.ip6_dst, &ip6.ip6_dst, sizeof(ip6.ip6_dst));
+ pseudo.ip6_src = ip6.ip6_src;
+ pseudo.ip6_dst = ip6.ip6_dst;
pseudo.length = htonl(ns_size + opt_size + ETH_ALEN);
pseudo.next = htonl(IPPROTO_ICMPV6);
memcpy(packet->data + ether_size + ip6_size, &ns, ns_size);
memcpy(packet->data + ether_size + ip6_size + ns_size, &opt, opt_size);
- write_packet(packet);
+ send_packet(source, packet);
+}
+
+static __inline__ void route_ipv6(node_t *source, vpn_packet_t *packet)
+{
+ cp();
+
+ if(!checklength(source, packet, ether_size + ip6_size))
+ return;
+
+ if(packet->data[20] == IPPROTO_ICMPV6 && checklength(source, packet, ether_size + ip6_size + icmp6_size) && packet->data[54] == ND_NEIGHBOR_SOLICIT) {
+ route_neighborsol(source, packet);
+ return;
+ }
+
+ route_ipv6_unicast(source, packet);
}
/* RFC 826 */
-static void route_arp(vpn_packet_t *packet)
+static void route_arp(node_t *source, vpn_packet_t *packet)
{
struct ether_arp arp;
subnet_t *subnet;
cp();
+ if(!checklength(source, packet, ether_size + arp_size))
+ return;
+
+ if(source != myself) {
+ ifdebug(TRAFFIC) logger(LOG_WARNING, _("Got ARP request from %s (%s) while in router mode!"), source->name, source->hostname);
+ return;
+ }
+
/* First, snatch the source address from the ARP packet */
if(overwrite_mac)
memcpy(packet->data + ether_size, &arp, arp_size);
- write_packet(packet);
+ send_packet(source, packet);
}
-void route_outgoing(vpn_packet_t *packet)
+void route(node_t *source, vpn_packet_t *packet)
{
- uint16_t type;
- node_t *n = NULL;
-
cp();
- if(packet->len < ether_size) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Read too short packet"));
+ if(!checklength(source, packet, ether_size))
return;
- }
-
- /* FIXME: multicast? */
-
- switch (routing_mode) {
- case RMODE_ROUTER:
- type = ntohs(*((uint16_t *)(&packet->data[12])));
- switch (type) {
- case ETH_P_IP:
- if(packet->len < ether_size + ip_size) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Read too short packet"));
- return;
- }
-
- n = route_ipv4(packet);
- break;
-
- case ETH_P_IPV6:
- if(packet->len < ether_size + ip6_size) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Read too short packet"));
- return;
- }
-
- if(packet->data[20] == IPPROTO_ICMPV6 && packet->len >= ether_size + ip6_size + ns_size && packet->data[54] == ND_NEIGHBOR_SOLICIT) {
- route_neighborsol(packet);
- return;
- }
- n = route_ipv6(packet);
- break;
-
- case ETH_P_ARP:
- if(packet->len < ether_size + arp_size) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Read too short packet"));
- return;
- }
-
- route_arp(packet);
- return;
-
- default:
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Cannot route packet: unknown type %hx"), type);
- return;
- }
- if(n)
- send_packet(n, packet);
- break;
-
- case RMODE_SWITCH:
- n = route_mac(packet);
- if(n)
- send_packet(n, packet);
- else
- broadcast_packet(myself, packet);
- break;
-
- case RMODE_HUB:
- broadcast_packet(myself, packet);
- break;
- }
-}
-
-void route_incoming(node_t *source, vpn_packet_t *packet)
-{
- if(packet->len < ether_size) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Read too short packet"));
- return;
- }
switch (routing_mode) {
case RMODE_ROUTER:
{
- node_t *n = NULL;
uint16_t type;
type = ntohs(*((uint16_t *)(&packet->data[12])));
switch (type) {
- case ETH_P_IP:
- if(packet->len < ether_size + ip_size) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Read too short packet"));
- return;
- }
+ case ETH_P_ARP:
+ route_arp(source, packet);
+ break;
- n = route_ipv4(packet);
+ case ETH_P_IP:
+ route_ipv4(source, packet);
break;
case ETH_P_IPV6:
- if(packet->len < ether_size + ip6_size) {
- ifdebug(TRAFFIC) logger(LOG_WARNING, _("Read too short packet"));
- return;
- }
-
- n = route_ipv6(packet);
+ route_ipv6(source, packet);
break;
default:
- n = myself;
+ ifdebug(TRAFFIC) logger(LOG_WARNING, _("Cannot route packet from %s (%s): unknown type %hx"), source->name, source->hostname, type);
break;
}
-
- if(n) {
- if(n == myself) {
- if(overwrite_mac)
- memcpy(packet->data, mymac.x, ETH_ALEN);
- write_packet(packet);
- } else
- send_packet(n, packet);
- }
}
break;
case RMODE_SWITCH:
- {
- subnet_t *subnet;
-
- subnet = lookup_subnet_mac((mac_t *)(&packet->data[0]));
-
- if(subnet) {
- if(subnet->owner == myself)
- write_packet(packet);
- else
- send_packet(subnet->owner, packet);
- } else {
- broadcast_packet(source, packet);
- write_packet(packet);
- }
- }
+ route_mac(source, packet);
break;
case RMODE_HUB:
- broadcast_packet(source, packet); /* Spread it on */
- write_packet(packet);
+ broadcast_packet(source, packet);
break;
}
}
projects / tinc / blobdiff