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nat64: Also translate DSCP and ECN fields

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Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
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Toke Høiland-Jørgensen
2021-10-01 00:26:01 +02:00
parent fc76452e1f
commit 4648814d26
1 changed files with 4 additions and 0 deletions
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4
nat64-bpf/nat64_kern.c
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@@ -120,6 +120,9 @@ static int nat64_handle_v4(struct __sk_buff *skb, struct hdr_cursor *nh)
dst_hdr.daddr = *dst_v6; dst_hdr.daddr = *dst_v6;
dst_hdr.nexthdr = iph->protocol; dst_hdr.nexthdr = iph->protocol;
dst_hdr.hop_limit = iph->ttl; dst_hdr.hop_limit = iph->ttl;
/* weird definition in ipv6hdr */
dst_hdr.priority = (iph->tos & 0x70) >> 4;
dst_hdr.flow_lbl[0] = iph->tos << 4;
dst_hdr.payload_len = bpf_htons(bpf_ntohs(iph->tot_len) - iphdr_len); dst_hdr.payload_len = bpf_htons(bpf_ntohs(iph->tot_len) - iphdr_len);
if (bpf_skb_change_proto(skb, bpf_htons(ETH_P_IPV6), 0)) if (bpf_skb_change_proto(skb, bpf_htons(ETH_P_IPV6), 0))
@@ -333,6 +336,7 @@ static int nat64_handle_v6(struct __sk_buff *skb, struct hdr_cursor *nh)
dst_hdr.saddr = bpf_htonl(v6_state->v4_addr); dst_hdr.saddr = bpf_htonl(v6_state->v4_addr);
dst_hdr.protocol = ip6h->nexthdr; dst_hdr.protocol = ip6h->nexthdr;
dst_hdr.ttl = ip6h->hop_limit; dst_hdr.ttl = ip6h->hop_limit;
dst_hdr.tos = ip6h->priority << 4 | (ip6h->flow_lbl[0] >> 4);
dst_hdr.tot_len = bpf_htons(bpf_ntohs(ip6h->payload_len) + sizeof(dst_hdr)); dst_hdr.tot_len = bpf_htons(bpf_ntohs(ip6h->payload_len) + sizeof(dst_hdr));
dst_hdr.check = csum_fold_helper(bpf_csum_diff((__be32 *)&dst_hdr, 0, dst_hdr.check = csum_fold_helper(bpf_csum_diff((__be32 *)&dst_hdr, 0,
(__be32 *)&dst_hdr, sizeof(dst_hdr), (__be32 *)&dst_hdr, sizeof(dst_hdr),