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If sourceIP is antrea-gw0/fl4096, use standard vxlan #1

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If sourceIP is antrea-gw0/fl4096, use standard vxlan #1

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7 changes: 7 additions & 0 deletions tc_prog/tc_prog_kern.c
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Original file line number Diff line number Diff line change
Expand Up @@ -273,6 +273,13 @@ int tc_init_in_func(struct __sk_buff *ctx) {
if (eth->h_proto != bpf_htons(ETH_P_IP)) goto out;
struct iphdr *iphdr = (struct iphdr *)(eth + 1);

unsigned int src_ip = iphdr->saddr;
src_ip = ntohl(src_ip);
unsigned int last_octet = src_ip & 0xFF;
if (last_octet == 1 || last_octet == 0) {
goto out;
}

// We only learn the flow that is marked as 0x4
if ((iphdr->tos & 0xc) != 0xc) goto out;
///////////////////////// Header/ifidx Learning ////////////////////
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