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/*
* netsniff-ng - the packet sniffing beast
* Copyright 2012 Markus Amend <markus@netsniff-ng.org>, Deutsche Flugsicherung GmbH
* Subject to the GPL, version 2.
*
* http://www.ieee802.org/1/pages/802.1ad.html
*/
#include <stdio.h>
#include <stdint.h>
#include <netinet/in.h> /* for ntohs() */
#include "proto.h"
#include "dissector_eth.h"
#include "built_in.h"
#include "pkt_buff.h"
struct QinQhdr {
uint16_t TCI;
uint16_t TPID;
} __packed;
static void QinQ_full(struct pkt_buff *pkt)
{
uint16_t tci;
struct QinQhdr *QinQ = (struct QinQhdr *) pkt_pull(pkt, sizeof(*QinQ));
if (QinQ == NULL)
return;
tci = ntohs(QinQ->TCI);
tprintf(" [ VLAN QinQ ");
tprintf("Prio (%d), ", (tci & 0xE000) >> 13);
tprintf("DEI (%d), ", (tci & 0x1000) >> 12);
tprintf("ID (%d), ", (tci & 0x0FFF));
tprintf("Proto (0x%.4x)", ntohs(QinQ->TPID));
tprintf(" ]\n");
pkt_set_dissector(pkt, ð_lay2, ntohs(QinQ->TPID));
}
static void QinQ_less(struct pkt_buff *pkt)
{
uint16_t tci;
struct QinQhdr *QinQ = (struct QinQhdr *) pkt_pull(pkt, sizeof(*QinQ));
if (QinQ == NULL)
return;
tci = ntohs(QinQ->TCI);
tprintf(" VLAN%d", (tci & 0x0FFF));
pkt_set_dissector(pkt, ð_lay2, ntohs(QinQ->TPID));
}
struct protocol QinQ_ops = {
.key = 0x88a8,
.print_full = QinQ_full,
.print_less = QinQ_less,
};
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