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nat64: Set Don't Fragment bit in IPv4 packets

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IPv6 doesn't support fragmentation, so make sure IPv4 packets are not
fragmented in-flight either.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
This commit is contained in:
Toke Høiland-Jørgensen
2021-10-04 17:51:32 +02:00
parent 742924a076
commit ced3d8c4bc
1 changed files with 1 additions and 0 deletions
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nat64-bpf/nat64_kern.c
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@@ -264,6 +264,7 @@ static int nat64_handle_v6(struct __sk_buff *skb, struct hdr_cursor *nh)
struct iphdr dst_hdr = {
.version = 4,
.ihl = 5,
.frag_off = bpf_htons(1<<14), /* set Don't Fragment bit */
};
ip_offset = (nh->pos - data) & 0x1fff;