--- a/nat64.c
+++ b/nat64.c
-@@ -19,6 +19,11 @@
-
- extern struct config *gcfg;
+@@ -129,6 +129,11 @@ static void log_pkt6(int err, struct pkt
+ type, saddr, daddr, (p->header_len + p->data_len),p->data_proto,msg);
+ }
+static uint16_t checksum_extend_byte(uint8_t b)
+{
static uint16_t ip_checksum(void *d, int c)
{
uint32_t sum = 0xffff;
-@@ -30,7 +35,7 @@ static uint16_t ip_checksum(void *d, int
+@@ -140,7 +145,7 @@ static uint16_t ip_checksum(void *d, int
}
if (c)
while (sum > 0xffff)
sum = (sum & 0xffff) + (sum >> 16);
-@@ -180,10 +185,12 @@ static int xlate_payload_4to6(struct pkt
+@@ -296,10 +301,12 @@ static int xlate_payload_4to6(struct pkt
cksum = ones_add(p->icmp->cksum, cksum);
if (p->icmp->type == 8) {
p->icmp->type = 128;
+ p->icmp->cksum = ones_add(cksum,
+ ~checksum_extend_byte(129 - 0));
}
- return 0;
- case 17:
-@@ -668,10 +675,12 @@ static int xlate_payload_6to4(struct pkt
+ return ERROR_NONE;
+ /* UDP */
+@@ -892,10 +899,12 @@ static int xlate_payload_6to4(struct pkt
cksum = ones_add(p->icmp->cksum, cksum);
if (p->icmp->type == 128) {
p->icmp->type = 8;
+ p->icmp->cksum = ones_add(cksum,
+ checksum_extend_byte(129 - 0));
}
- return 0;
- case 17:
+ return ERROR_NONE;
+ /* UDP */