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Sprinkling the source with static and attributes.
[tinc]
/
src
/
route.c
diff --git
a/src/route.c
b/src/route.c
index
06dffc9
..
1cdf964
100644
(file)
--- a/
src/route.c
+++ b/
src/route.c
@@
-17,7
+17,7
@@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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.
49 2003/03/29 22:11:22
guus Exp $
+ $Id: route.c,v 1.1.2.
55 2003/07/06 23:16:29
guus Exp $
*/
#include "config.h"
*/
#include "config.h"
@@
-38,12
+38,13
@@
#endif
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#endif
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
+#ifdef HAVE_NETINET_IP6_H
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
+#endif
#include <netinet/if_ether.h>
#include <utils.h>
#include <xalloc.h>
#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 <string.h>
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
@@
-57,21
+58,37
@@
#include "route.h"
#include "protocol.h"
#include "device.h"
#include "route.h"
#include "protocol.h"
#include "device.h"
+#include "logger.h"
#include "system.h"
#include "system.h"
+/* Missing definitions */
+
#ifndef ETHER_ADDR_LEN
#define ETHER_ADDR_LEN 6
#endif
#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;
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 */
/* 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;
{
uint16_t *p = data;
uint32_t checksum = prevsum ^ 0xFFFF;
@@
-90,7
+107,7
@@
uint16_t inet_checksum(void *data, int len, uint16_t prevsum)
return ~checksum;
}
return ~checksum;
}
-int ratelimit(void) {
+
static
int ratelimit(void) {
static time_t lasttime = 0;
if(lasttime == now)
static time_t lasttime = 0;
if(lasttime == now)
@@
-100,7
+117,7
@@
int ratelimit(void) {
return 0;
}
return 0;
}
-void learn_mac(mac_t *address)
+
static
void learn_mac(mac_t *address)
{
subnet_t *subnet;
avl_node_t *node;
{
subnet_t *subnet;
avl_node_t *node;
@@
-113,8
+130,7
@@
void learn_mac(mac_t *address)
/* If we don't know this MAC address yet, store it */
if(!subnet || subnet->owner != myself) {
/* 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]);
address->x[0], address->x[1], address->x[2], address->x[3],
address->x[4], address->x[5]);
@@
-147,8
+163,7
@@
void age_mac(void)
next = node->next;
s = (subnet_t *) node->data;
if(s->type == SUBNET_MAC && s->net.mac.lastseen && s->net.mac.lastseen + macexpire < now) {
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]);
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]);
@@
-164,7
+179,7
@@
void age_mac(void)
}
}
}
}
-node_t *route_mac(vpn_packet_t *packet)
+
static
node_t *route_mac(vpn_packet_t *packet)
{
subnet_t *subnet;
{
subnet_t *subnet;
@@
-186,7
+201,7
@@
node_t *route_mac(vpn_packet_t *packet)
/* RFC 792 */
/* 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;
{
struct ip *hdr;
struct icmp *icmp;
@@
-209,8
+224,8
@@
void route_ipv4_unreachable(vpn_packet_t *packet, uint8_t code)
memcpy(&ip_dst, &hdr->ip_dst, 4);
oldlen = packet->len - 14;
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 */
/* Copy first part of original contents to ICMP message */
@@
-245,7
+260,7
@@
void route_ipv4_unreachable(vpn_packet_t *packet, uint8_t code)
write_packet(packet);
}
write_packet(packet);
}
-node_t *route_ipv4(vpn_packet_t *packet)
+
static
node_t *route_ipv4(vpn_packet_t *packet)
{
subnet_t *subnet;
{
subnet_t *subnet;
@@
-257,11
+272,9
@@
node_t *route_ipv4(vpn_packet_t *packet)
subnet = lookup_subnet_ipv4((ipv4_t *) & packet->data[30]);
if(!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]);
packet->data[30], packet->data[31], packet->data[32],
packet->data[33]);
- }
route_ipv4_unreachable(packet, ICMP_NET_UNKNOWN);
return NULL;
route_ipv4_unreachable(packet, ICMP_NET_UNKNOWN);
return NULL;
@@
-273,9
+286,11
@@
node_t *route_ipv4(vpn_packet_t *packet)
return subnet->owner;
}
return subnet->owner;
}
+#ifdef HAVE_NETINET_IP6_H
+
/* RFC 2463 */
/* 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;
{
struct ip6_hdr *hdr;
struct icmp6_hdr *icmp;
@@
-341,7
+356,9
@@
void route_ipv6_unreachable(vpn_packet_t *packet, uint8_t code)
write_packet(packet);
}
write_packet(packet);
}
-node_t *route_ipv6(vpn_packet_t *packet)
+#endif
+
+static node_t *route_ipv6(vpn_packet_t *packet)
{
subnet_t *subnet;
{
subnet_t *subnet;
@@
-350,8
+367,7
@@
node_t *route_ipv6(vpn_packet_t *packet)
subnet = lookup_subnet_ipv6((ipv6_t *) & packet->data[38]);
if(!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[38]),
ntohs(*(uint16_t *) & packet->data[40]),
ntohs(*(uint16_t *) & packet->data[42]),
@@
-360,21
+376,26
@@
node_t *route_ipv6(vpn_packet_t *packet)
ntohs(*(uint16_t *) & packet->data[48]),
ntohs(*(uint16_t *) & packet->data[50]),
ntohs(*(uint16_t *) & packet->data[52]));
ntohs(*(uint16_t *) & packet->data[48]),
ntohs(*(uint16_t *) & packet->data[50]),
ntohs(*(uint16_t *) & packet->data[52]));
- }
+#ifdef HAVE_NETINET_IP6_H
route_ipv6_unreachable(packet, ICMP6_DST_UNREACH_ADDR);
route_ipv6_unreachable(packet, ICMP6_DST_UNREACH_ADDR);
+#endif
return NULL;
}
return NULL;
}
+#ifdef HAVE_NETINET_IP6_H
if(!subnet->owner->status.reachable)
route_ipv6_unreachable(packet, ICMP6_DST_UNREACH_NOROUTE);
if(!subnet->owner->status.reachable)
route_ipv6_unreachable(packet, ICMP6_DST_UNREACH_NOROUTE);
-
+#endif
+
return subnet->owner;
}
return subnet->owner;
}
+#ifdef HAVE_NETINET_IP6_H
+
/* RFC 2461 */
/* 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;
{
struct ip6_hdr *hdr;
struct nd_neighbor_solicit *ns;
@@
-397,15
+418,14
@@
void route_neighborsol(vpn_packet_t *packet)
/* First, snatch the source address from the neighbor solicitation packet */
/* 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) {
/* 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;
}
return;
}
@@
-422,8
+442,7
@@
void route_neighborsol(vpn_packet_t *packet)
checksum = inet_checksum(ns, sizeof(*ns) + 8, checksum);
if(checksum) {
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;
}
return;
}
@@
-432,8
+451,7
@@
void route_neighborsol(vpn_packet_t *packet)
subnet = lookup_subnet_ipv6((ipv6_t *) & ns->nd_ns_target);
if(!subnet) {
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)[0]),
ntohs(((uint16_t *) & ns->nd_ns_target)[1]),
ntohs(((uint16_t *) & ns->nd_ns_target)[2]),
@@
-442,7
+460,6
@@
void route_neighborsol(vpn_packet_t *packet)
ntohs(((uint16_t *) & ns->nd_ns_target)[5]),
ntohs(((uint16_t *) & ns->nd_ns_target)[6]),
ntohs(((uint16_t *) & ns->nd_ns_target)[7]));
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;
}
return;
}
@@
-487,9
+504,11
@@
void route_neighborsol(vpn_packet_t *packet)
write_packet(packet);
}
write_packet(packet);
}
+#endif
+
/* RFC 826 */
/* RFC 826 */
-void route_arp(vpn_packet_t *packet)
+
static
void route_arp(vpn_packet_t *packet)
{
struct ether_arp *arp;
subnet_t *subnet;
{
struct ether_arp *arp;
subnet_t *subnet;
@@
-499,7
+518,8
@@
void route_arp(vpn_packet_t *packet)
/* First, snatch the source address from the ARP packet */
/* 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).
/* This routine generates replies to ARP requests.
You don't need to set NOARP flag on the interface anymore (which is broken on FreeBSD).
@@
-512,9
+532,7
@@
void route_arp(vpn_packet_t *packet)
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(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;
}
return;
}
@@
-523,12
+541,9
@@
void route_arp(vpn_packet_t *packet)
subnet = lookup_subnet_ipv4((ipv4_t *) arp->arp_tpa);
if(!subnet) {
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]);
arp->arp_tpa[0], arp->arp_tpa[1], arp->arp_tpa[2],
arp->arp_tpa[3]);
- }
-
return;
}
return;
}
@@
-569,10
+584,12
@@
void route_outgoing(vpn_packet_t *packet)
break;
case 0x86DD:
break;
case 0x86DD:
+#ifdef HAVE_NETINET_IP6_H
if(packet->data[20] == IPPROTO_ICMPV6 && packet->data[54] == ND_NEIGHBOR_SOLICIT) {
route_neighborsol(packet);
return;
}
if(packet->data[20] == IPPROTO_ICMPV6 && packet->data[54] == ND_NEIGHBOR_SOLICIT) {
route_neighborsol(packet);
return;
}
+#endif
n = route_ipv6(packet);
break;
n = route_ipv6(packet);
break;
@@
-581,8
+598,7
@@
void route_outgoing(vpn_packet_t *packet)
return;
default:
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)
return;
}
if(n)
@@
-628,7
+644,8
@@
void route_incoming(node_t *source, vpn_packet_t *packet)
if(n) {
if(n == myself) {
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);
write_packet(packet);
} else
send_packet(n, packet);