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Merge "clatd bpf: drop multicast" into main

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This commit is contained in:
Maciej Żenczykowski 2025-03-25 15:39:25 -07:00 • committed by Gerrit Code Review
commit b45a61bc3f
1 changed files with 2 additions and 2 deletions
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4
bpf/progs/clatd.c
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@ -288,8 +288,8 @@ DEFINE_BPF_PROG("schedcls/egress4/clat_rawip", AID_ROOT, AID_SYSTEM, sched_cls_e
// We cannot handle IP options, just standard 20 byte == 5 dword minimal IPv4 header
if (ip4->ihl != 5) return TC_ACT_PIPE;
// Packet must not be multicast
if ((ip4->daddr & htonl(0xf0000000)) == htonl(0xe0000000)) return TC_ACT_PIPE;
// Packet must not be multicast, if it is just outright drop it.
if ((ip4->daddr & htonl(0xf0000000)) == htonl(0xe0000000)) return TC_ACT_SHOT;
// Calculate the IPv4 one's complement checksum of the IPv4 header.
__wsum sum4 = 0;