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IPv6: SRH setup correct DA for pseudo header 

When a Segment Routing Header is present in the IPv6 packet provisions
have to be made to setup the right destination address for the pseudo
header used in checksum calculations. When segments are left in the header
the first address in the list has to replace the destination address.

Closes #17097
This commit is contained in:
Jaap Keuter 2020-12-18 13:22:15 +01:00 committed by AndersBroman
parent 8b0d19c634
commit 7052994a19
1 changed files with 4 additions and 0 deletions
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4
epan/dissectors/packet-ipv6.c
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@ -1109,6 +1109,10 @@ dissect_routing6_srh(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *
"IPv6 Type 4 Routing Header segments left field must not exceed address count (%u)", addr_count);
}
if (pinfo->dst.type == AT_IPv6 && rt->hdr.ip6r_segleft > 0) {
alloc_address_wmem_ipv6(pinfo->pool, &pinfo->dst, tvb_get_ptr_ipv6(tvb, offset));
}
for (unsigned i = 0; i < addr_count; i++) {
addr_offset = offset + i * IPv6_ADDR_SIZE;
_proto_tree_add_ipv6_vector_address(tree, hf_ipv6_routing_srh_addr, tvb,