along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: route.c,v 1.1.2.10 2001/06/04 11:14:35 guus Exp $
+ $Id: route.c,v 1.1.2.20 2001/10/27 13:13:35 guus Exp $
*/
#include "config.h"
#endif
#include <sys/socket.h>
#include <netinet/in.h>
-#include <net/ethernet.h>
+#ifdef HAVE_SOLARIS
+ #include <net/if.h>
+ #define ETHER_ADDR_LEN 6
+#else
+ #include <net/ethernet.h>
+#endif
#include <netinet/if_ether.h>
#include <utils.h>
#include <xalloc.h>
#include <syslog.h>
+#include <string.h>
+
+#include <avl_tree.h>
#include "net.h"
-#include "net/ethernet.h"
-#include "netinet/if_ether.h"
#include "connection.h"
#include "subnet.h"
#include "route.h"
+#include "protocol.h"
+#include "device.h"
#include "system.h"
int routing_mode = RMODE_ROUTER;
subnet_t mymac;
-void learn_mac(connection_t *source, mac_t *address)
+void learn_mac(mac_t *address)
{
subnet_t *subnet;
+ avl_node_t *node;
+ connection_t *c;
cp
subnet = lookup_subnet_mac(address);
+
+ /* If we don't know this MAC address yet, store it */
- if(!subnet)
+ if(!subnet || subnet->owner!=myself)
{
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ syslog(LOG_INFO, _("Learned new MAC address %hhx:%hhx:%hhx:%hhx:%hhx:%hhx"),
+ 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;
-// subnet->lasttime = gettimeofday();
memcpy(&subnet->net.mac.address, address, sizeof(mac_t));
- subnet_add(source, subnet);
+ subnet_add(myself, subnet);
- if(debug_lvl >= DEBUG_TRAFFIC)
+ /* And tell all other tinc daemons it's our MAC */
+
+ for(node = connection_tree->head; node; node = node->next)
{
- syslog(LOG_DEBUG, _("Learned new MAC address %x:%x:%x:%x:%x:%x from %s (%s)"),
- address->x[0],
- address->x[1],
- address->x[2],
- address->x[3],
- address->x[4],
- address->x[5],
- source->name, source->hostname);
+ c = (connection_t *)node->data;
+ if(c->status.active)
+ send_add_subnet(c, subnet);
}
}
}
-connection_t *route_mac(connection_t *source, vpn_packet_t *packet)
+node_t *route_mac(vpn_packet_t *packet)
{
subnet_t *subnet;
cp
/* Learn source address */
- learn_mac(source, (mac_t *)(&packet->data[0]));
+ learn_mac((mac_t *)(&packet->data[6]));
/* Lookup destination address */
- subnet = lookup_subnet_mac((mac_t *)(&packet->data[6]));
+ subnet = lookup_subnet_mac((mac_t *)(&packet->data[0]));
- if(!subnet)
- {
- if(debug_lvl >= DEBUG_TRAFFIC)
- {
- syslog(LOG_WARNING, _("Cannot route packet: unknown destination address %x:%x:%x:%x:%x:%x"),
- packet->data[6],
- packet->data[7],
- packet->data[8],
- packet->data[9],
- packet->data[10],
- packet->data[11]);
- }
- return NULL;
- }
-cp
- return subnet->owner;
+ if(subnet)
+ return subnet->owner;
+ else
+ return NULL;
}
-connection_t *route_ipv4(vpn_packet_t *packet)
+node_t *route_ipv4(vpn_packet_t *packet)
{
ipv4_t dest;
subnet_t *subnet;
cp
+#ifdef HAVE_SOLARIS
+ /* The other form gives bus errors on a SparcStation 20. */
+ dest = ((packet->data[30] * 0x100 + packet->data[31]) * 0x100 + packet->data[32]) * 0x100 + packet->data[33];
+#else
dest = ntohl(*((unsigned long*)(&packet->data[30])));
-
+#endif
+cp
subnet = lookup_subnet_ipv4(&dest);
-
+cp
if(!subnet)
{
if(debug_lvl >= DEBUG_TRAFFIC)
return subnet->owner;
}
-connection_t *route_ipv6(vpn_packet_t *packet)
+node_t *route_ipv6(vpn_packet_t *packet)
{
+ ipv6_t dest;
+ subnet_t *subnet;
+cp
+ memcpy(&dest, &packet->data[30], sizeof(ipv6_t));
+
+ subnet = lookup_subnet_ipv6(&dest);
cp
- if(debug_lvl > DEBUG_NOTHING)
+ if(!subnet)
{
- syslog(LOG_WARNING, _("Cannot route packet: IPv6 routing not yet implemented"));
- }
+ if(debug_lvl >= DEBUG_TRAFFIC)
+ {
+ syslog(LOG_WARNING, _("Cannot route packet: unknown IPv6 destination address"));
+ }
+
+ return NULL;
+ }
cp
- return NULL;
+ return subnet->owner;
}
void route_arp(vpn_packet_t *packet)
unsigned char ipbuf[4];
ipv4_t dest;
cp
+ /* First, snatch the source address from the ARP packet */
+
+ memcpy(mymac.net.mac.address.x, packet->data + 6, 6);
+
/* This routine generates replies to ARP requests.
You don't need to set NOARP flag on the interface anymore (which is broken on FreeBSD).
Most of the code here is taken from choparp.c by Takamichi Tateoka (tree@mma.club.uec.ac.jp)
memcpy(arp->arp_sha, packet->data + ETHER_ADDR_LEN, ETHER_ADDR_LEN); /* add fake source hard addr */
arp->arp_op = htons(ARPOP_REPLY);
- accept_packet(packet);
+ write_packet(packet);
cp
}
void route_outgoing(vpn_packet_t *packet)
{
unsigned short int type;
- avl_node_t *node;
- connection_t *cl;
+ node_t *n;
cp
/* FIXME: multicast? */
switch(type)
{
case 0x0800:
- cl = route_ipv4(packet);
+ n = route_ipv4(packet);
break;
case 0x86DD:
- cl = route_ipv6(packet);
+ n = route_ipv6(packet);
break;
case 0x0806:
route_arp(packet);
}
return;
}
- if(cl)
- send_packet(cl, packet);
+ if(n)
+ send_packet(n, packet);
break;
case RMODE_SWITCH:
- cl = route_mac(myself, packet);
- if(cl)
- send_packet(cl, packet);
+ n = route_mac(packet);
+ if(n)
+ send_packet(n, packet);
+ else
+ broadcast_packet(myself, packet);
break;
case RMODE_HUB:
- for(node = connection_tree->head; node; node = node->next)
- {
- cl = (connection_t *)node->data;
- if(cl->status.active)
- send_packet(cl, packet);
- }
+ broadcast_packet(myself, packet);
break;
}
}
-void route_incoming(connection_t *source, vpn_packet_t *packet)
+void route_incoming(node_t *source, vpn_packet_t *packet)
{
switch(routing_mode)
{
case RMODE_ROUTER:
- memcpy(packet->data, mymac.net.mac.address.x, 6);
+ memcpy(packet->data, mymac.net.mac.address.x, 6); /* Override destination address to make the kernel accept it */
+ write_packet(packet);
break;
case RMODE_SWITCH:
- learn_mac(source, (mac_t *)(&packet->data[0]));
+ {
+ 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);
+ }
+ }
+ break;
+ case RMODE_HUB:
+ broadcast_packet(source, packet); /* Spread it on */
+ write_packet(packet);
break;
}
-
- accept_packet(packet);
}
projects / tinc / blobdiff