X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Froute.c;h=571b1ba2edc8a25ea7eb2c18238865f95955f5df;hp=00aa486368b9e1327483f390212a6ecb6323f257;hb=12de5a8eedd985f4732e88de6185f77a8244612c;hpb=7d21a8d1c7fd8909fe02385dbb4717c074db4648

diff --git a/src/route.c b/src/route.c
index 00aa4863..571b1ba2 100644
--- 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.
 
-    $Id: route.c,v 1.1.2.47 2003/03/29 21:51:21 guus Exp $
+    $Id: route.c,v 1.1.2.50 2003/06/11 19:28:35 guus Exp $
 */
 
 #include "config.h"
@@ -67,7 +67,8 @@
 int routing_mode = RMODE_ROUTER;
 int priorityinheritance = 0;
 int macexpire = 600;
-subnet_t mymac;
+int overwrite_mac = 0;
+mac_t mymac = {0xFE, 0xFD, 0, 0, 0, 0};
 
 /* RFC 1071 */
 
@@ -76,10 +77,13 @@ 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);
@@ -295,8 +299,8 @@ void route_ipv6_unreachable(vpn_packet_t *packet, uint8_t code)
 
 	/* Remember original source and destination */
 		
-	memcpy(&pseudo.ip6_src, &hdr->ip6_src, 16);
-	memcpy(&pseudo.ip6_dst, &hdr->ip6_dst, 16);
+	memcpy(&pseudo.ip6_src, &hdr->ip6_dst, 16);
+	memcpy(&pseudo.ip6_dst, &hdr->ip6_src, 16);
 	pseudo.length = ntohs(hdr->ip6_plen) + sizeof(*hdr);
 	
 	if(pseudo.length >= IP_MSS - sizeof(*hdr) - sizeof(*icmp))
@@ -312,8 +316,8 @@ void route_ipv6_unreachable(vpn_packet_t *packet, uint8_t code)
 	hdr->ip6_plen = htons(sizeof(*icmp) + pseudo.length);
 	hdr->ip6_nxt = IPPROTO_ICMPV6;
 	hdr->ip6_hlim = 255;
-	memcpy(&hdr->ip6_dst, &pseudo.ip6_src, 16);
-	memcpy(&hdr->ip6_src, &pseudo.ip6_dst, 16);
+	memcpy(&hdr->ip6_dst, &pseudo.ip6_dst, 16);
+	memcpy(&hdr->ip6_src, &pseudo.ip6_src, 16);
 
 	/* Fill in ICMP header */
 	
@@ -323,8 +327,6 @@ void route_ipv6_unreachable(vpn_packet_t *packet, uint8_t code)
 
 	/* Create pseudo header */
 		
-	memcpy(&pseudo.ip6_src, &hdr->ip6_src, 16);
-	memcpy(&pseudo.ip6_dst, &hdr->ip6_dst, 16);
 	pseudo.length = htonl(sizeof(*icmp) + pseudo.length);
 	pseudo.next = htonl(IPPROTO_ICMPV6);
 
@@ -396,7 +398,8 @@ void route_neighborsol(vpn_packet_t *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 */
 
@@ -498,7 +501,8 @@ void route_arp(vpn_packet_t *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).
@@ -627,7 +631,8 @@ void route_incoming(node_t *source, vpn_packet_t *packet)
 
 				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);