along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: route.c,v 1.1.2.48 2003/03/29 21:58:35 guus Exp $
+ $Id: route.c,v 1.1.2.56 2003/07/07 11:11:33 guus Exp $
*/
#include "config.h"
#endif
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
+#ifdef HAVE_NETINET_IP6_H
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
+#endif
#include <netinet/if_ether.h>
#include <utils.h>
#include <xalloc.h>
-#include <syslog.h>
#include <string.h>
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#include "route.h"
#include "protocol.h"
#include "device.h"
+#include "logger.h"
#include "system.h"
+/* Missing definitions */
+
#ifndef ETHER_ADDR_LEN
#define ETHER_ADDR_LEN 6
#endif
+#ifndef ICMP_DEST_UNREACH
+#define ICMP_DEST_UNREACH 3
+#endif
+
+#ifndef ICMP_NET_UNKNOWN
+#define ICMP_NET_UNKNOWN 6
+#endif
+
+#ifndef ICMP_NET_UNREACH
+#define ICMP_NET_UNREACH 0
+#endif
+
int routing_mode = RMODE_ROUTER;
int priorityinheritance = 0;
int macexpire = 600;
-subnet_t mymac;
+int overwrite_mac = 0;
+static mac_t mymac = {{0xFE, 0xFD, 0, 0, 0, 0}};
/* RFC 1071 */
-uint16_t inet_checksum(void *data, int len, uint16_t prevsum)
+static uint16_t inet_checksum(void *data, int len, uint16_t prevsum)
{
uint16_t *p = data;
uint32_t checksum = prevsum ^ 0xFFFF;
- len /= 2;
-
- while(len--)
+ while(len >= 2) {
checksum += *p++;
+ len -= 2;
+ }
+
+ if(len)
+ checksum += *(unsigned char *)p;
while(checksum >> 16)
checksum = (checksum & 0xFFFF) + (checksum >> 16);
return ~checksum;
}
-int ratelimit(void) {
+static int ratelimit(void) {
static time_t lasttime = 0;
if(lasttime == now)
return 0;
}
-void learn_mac(mac_t *address)
+static 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(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_INFO, _("Learned new MAC address %hx:%hx:%hx:%hx:%hx:%hx"),
+ logger(DEBUG_TRAFFIC, 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]);
next = node->next;
s = (subnet_t *) node->data;
if(s->type == SUBNET_MAC && s->net.mac.lastseen && s->net.mac.lastseen + macexpire < now) {
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_INFO, _("MAC address %hx:%hx:%hx:%hx:%hx:%hx expired"),
+ logger(DEBUG_TRAFFIC, 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]);
}
}
-node_t *route_mac(vpn_packet_t *packet)
+static node_t *route_mac(vpn_packet_t *packet)
{
subnet_t *subnet;
/* RFC 792 */
-void route_ipv4_unreachable(vpn_packet_t *packet, uint8_t code)
+static void route_ipv4_unreachable(vpn_packet_t *packet, uint8_t code)
{
struct ip *hdr;
struct icmp *icmp;
memcpy(&ip_dst, &hdr->ip_dst, 4);
oldlen = packet->len - 14;
- if(oldlen >= IP_MSS - sizeof(*hdr) - sizeof(struct icmphdr))
- oldlen = IP_MSS - sizeof(*hdr) - sizeof(struct icmphdr);
+ if(oldlen >= IP_MSS - sizeof(*hdr) - sizeof(*icmp))
+ oldlen = IP_MSS - sizeof(*hdr) - sizeof(*icmp);
/* Copy first part of original contents to ICMP message */
write_packet(packet);
}
-node_t *route_ipv4(vpn_packet_t *packet)
+static node_t *route_ipv4(vpn_packet_t *packet)
{
subnet_t *subnet;
subnet = lookup_subnet_ipv4((ipv4_t *) & packet->data[30]);
if(!subnet) {
- if(debug_lvl >= DEBUG_TRAFFIC) {
- syslog(LOG_WARNING, _("Cannot route packet: unknown IPv4 destination address %d.%d.%d.%d"),
+ logger(DEBUG_TRAFFIC, 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;
/* RFC 2463 */
-void route_ipv6_unreachable(vpn_packet_t *packet, uint8_t code)
+static void route_ipv6_unreachable(vpn_packet_t *packet, uint8_t code)
{
struct ip6_hdr *hdr;
struct icmp6_hdr *icmp;
write_packet(packet);
}
-node_t *route_ipv6(vpn_packet_t *packet)
+static node_t *route_ipv6(vpn_packet_t *packet)
{
subnet_t *subnet;
subnet = lookup_subnet_ipv6((ipv6_t *) & packet->data[38]);
if(!subnet) {
- if(debug_lvl >= DEBUG_TRAFFIC) {
- syslog(LOG_WARNING, _("Cannot route packet: unknown IPv6 destination address %hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx"),
+ logger(DEBUG_TRAFFIC, 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[48]),
ntohs(*(uint16_t *) & packet->data[50]),
ntohs(*(uint16_t *) & packet->data[52]));
- }
route_ipv6_unreachable(packet, ICMP6_DST_UNREACH_ADDR);
return NULL;
if(!subnet->owner->status.reachable)
route_ipv6_unreachable(packet, ICMP6_DST_UNREACH_NOROUTE);
-
+
return subnet->owner;
}
/* RFC 2461 */
-void route_neighborsol(vpn_packet_t *packet)
+static void route_neighborsol(vpn_packet_t *packet)
{
struct ip6_hdr *hdr;
struct nd_neighbor_solicit *ns;
/* First, snatch the source address from the neighbor solicitation packet */
- memcpy(mymac.net.mac.address.x, packet->data + 6, 6);
+ if(overwrite_mac)
+ memcpy(mymac.x, packet->data + 6, 6);
/* Check if this is a valid neighbor solicitation request */
if(ns->nd_ns_hdr.icmp6_type != ND_NEIGHBOR_SOLICIT ||
opt->nd_opt_type != ND_OPT_SOURCE_LINKADDR) {
- if(debug_lvl > DEBUG_TRAFFIC) {
- syslog(LOG_WARNING, _("Cannot route packet: received unknown type neighbor solicitation request"));
- }
+ logger(DEBUG_TRAFFIC, LOG_WARNING, _("Cannot route packet: received unknown type neighbor solicitation request"));
return;
}
checksum = inet_checksum(ns, sizeof(*ns) + 8, checksum);
if(checksum) {
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_WARNING, _("Cannot route packet: checksum error for neighbor solicitation request"));
+ logger(DEBUG_TRAFFIC, LOG_WARNING, _("Cannot route packet: checksum error for neighbor solicitation request"));
return;
}
subnet = lookup_subnet_ipv6((ipv6_t *) & ns->nd_ns_target);
if(!subnet) {
- if(debug_lvl >= DEBUG_TRAFFIC) {
- syslog(LOG_WARNING, _("Cannot route packet: neighbor solicitation request for unknown address %hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx"),
+ logger(DEBUG_TRAFFIC, LOG_WARNING, _("Cannot route packet: neighbor solicitation request for unknown address %hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx"),
ntohs(((uint16_t *) & ns->nd_ns_target)[0]),
ntohs(((uint16_t *) & ns->nd_ns_target)[1]),
ntohs(((uint16_t *) & ns->nd_ns_target)[2]),
ntohs(((uint16_t *) & ns->nd_ns_target)[5]),
ntohs(((uint16_t *) & ns->nd_ns_target)[6]),
ntohs(((uint16_t *) & ns->nd_ns_target)[7]));
- }
return;
}
/* RFC 826 */
-void route_arp(vpn_packet_t *packet)
+static void route_arp(vpn_packet_t *packet)
{
struct ether_arp *arp;
subnet_t *subnet;
/* First, snatch the source address from the ARP packet */
- memcpy(mymac.net.mac.address.x, packet->data + 6, 6);
+ if(overwrite_mac)
+ memcpy(mymac.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).
if(ntohs(arp->arp_hrd) != ARPHRD_ETHER || ntohs(arp->arp_pro) != ETHERTYPE_IP ||
arp->arp_hln != ETHER_ADDR_LEN || arp->arp_pln != 4 || ntohs(arp->arp_op) != ARPOP_REQUEST) {
- if(debug_lvl > DEBUG_TRAFFIC) {
- syslog(LOG_WARNING, _("Cannot route packet: received unknown type ARP request"));
- }
+ logger(DEBUG_TRAFFIC, LOG_WARNING, _("Cannot route packet: received unknown type ARP request"));
return;
}
subnet = lookup_subnet_ipv4((ipv4_t *) arp->arp_tpa);
if(!subnet) {
- if(debug_lvl >= DEBUG_TRAFFIC) {
- syslog(LOG_WARNING, _("Cannot route packet: ARP request for unknown address %d.%d.%d.%d"),
+ logger(DEBUG_TRAFFIC, LOG_WARNING, _("Cannot route packet: ARP request for unknown address %d.%d.%d.%d"),
arp->arp_tpa[0], arp->arp_tpa[1], arp->arp_tpa[2],
arp->arp_tpa[3]);
- }
-
return;
}
return;
default:
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_WARNING, _("Cannot route packet: unknown type %hx"), type);
+ logger(DEBUG_TRAFFIC, LOG_WARNING, _("Cannot route packet: unknown type %hx"), type);
return;
}
if(n)
if(n) {
if(n == myself) {
- memcpy(packet->data, mymac.net.mac.address.x, 6);
+ if(overwrite_mac)
+ memcpy(packet->data, mymac.x, 6);
write_packet(packet);
} else
send_packet(n, packet);
projects / tinc / blobdiff