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Added more than one vlan support (with Avi Slavkin) #5

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Added more than one vlan support (with Avi Slavkin) #5

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6 changes: 6 additions & 0 deletions src/libnids.c
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Original file line number Diff line number Diff line change
Expand Up @@ -253,6 +253,12 @@ void nids_pcap_handler(u_char * par, struct pcap_pkthdr *hdr, u_char * data)
} else if (data[12] == 0x81 && data[13] == 0) {
/* Skip 802.1Q VLAN and priority information */
nids_linkoffset = 18;
int vlan_offset = 4;
while(data[12 + vlan_offset] == 0x81 && data[13 + vlan_offset] == 0)
{
nids_linkoffset += 4;
vlan_offset = vlan_offset + 4;
}
} else
/* non-ip frame */
return;
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