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146 lines
4.4 KiB
C
146 lines
4.4 KiB
C
/* Copyright (C) 2007-2010 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* \ingroup decode
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*
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* @{
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*/
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/**
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* \file
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*
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* \author Victor Julien <victor@inliniac.net>
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*
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* Decode Ethernet
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*/
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#include "suricata-common.h"
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#include "decode.h"
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#include "decode-ethernet.h"
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#include "decode-events.h"
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#include "util-unittest.h"
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#include "util-debug.h"
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void DecodeEthernet(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, uint8_t *pkt, uint16_t len, PacketQueue *pq)
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{
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SCPerfCounterIncr(dtv->counter_eth, tv->sc_perf_pca);
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if (len < ETHERNET_HEADER_LEN) {
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ENGINE_SET_EVENT(p,ETHERNET_PKT_TOO_SMALL);
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return;
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}
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p->ethh = (EthernetHdr *)pkt;
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if (p->ethh == NULL)
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return;
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SCLogDebug("p %p pkt %p ether type %04x", p, pkt, ntohs(p->ethh->eth_type));
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switch (ntohs(p->ethh->eth_type)) {
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case ETHERNET_TYPE_IP:
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//printf("DecodeEthernet ip4\n");
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DecodeIPV4(tv, dtv, p, pkt + ETHERNET_HEADER_LEN,
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len - ETHERNET_HEADER_LEN, pq);
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break;
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case ETHERNET_TYPE_IPV6:
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//printf("DecodeEthernet ip6\n");
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DecodeIPV6(tv, dtv, p, pkt + ETHERNET_HEADER_LEN,
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len - ETHERNET_HEADER_LEN, pq);
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break;
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case ETHERNET_TYPE_PPPOE_SESS:
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//printf("DecodeEthernet PPPOE Session\n");
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DecodePPPOESession(tv, dtv, p, pkt + ETHERNET_HEADER_LEN,
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len - ETHERNET_HEADER_LEN, pq);
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break;
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case ETHERNET_TYPE_PPPOE_DISC:
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//printf("DecodeEthernet PPPOE Discovery\n");
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DecodePPPOEDiscovery(tv, dtv, p, pkt + ETHERNET_HEADER_LEN,
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len - ETHERNET_HEADER_LEN, pq);
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break;
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case ETHERNET_TYPE_VLAN:
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DecodeVLAN(tv, dtv, p, pkt + ETHERNET_HEADER_LEN,
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len - ETHERNET_HEADER_LEN, pq);
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break;
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default:
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SCLogDebug("p %p pkt %p ether type %04x not supported", p,
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pkt, ntohs(p->ethh->eth_type));
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}
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return;
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}
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#ifdef UNITTESTS
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/** DecodeEthernettest01
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* \brief Valid Ethernet packet
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* \retval 0 Expected test value
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*/
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static int DecodeEthernetTest01 (void) {
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/* ICMP packet wrapped in PPPOE */
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uint8_t raw_eth[] = {
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0x00, 0x10, 0x94, 0x55, 0x00, 0x01, 0x00, 0x10,
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0x94, 0x56, 0x00, 0x01, 0x88, 0x64, 0x11, 0x00,
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0x00, 0x01, 0x00, 0x68, 0x00, 0x21, 0x45, 0xc0,
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0x00, 0x64, 0x00, 0x1e, 0x00, 0x00, 0xff, 0x01,
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0xa7, 0x78, 0x0a, 0x00, 0x00, 0x02, 0x0a, 0x00,
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0x00, 0x01, 0x08, 0x00, 0x4a, 0x61, 0x00, 0x06,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f,
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0x3b, 0xd4, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
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0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
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0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
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0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
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0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
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0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
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0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
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0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd, 0xab, 0xcd,
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0xab, 0xcd };
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Packet *p = SCMalloc(SIZE_OF_PACKET);
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if (p == NULL)
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return 0;
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ThreadVars tv;
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DecodeThreadVars dtv;
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memset(&dtv, 0, sizeof(DecodeThreadVars));
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memset(&tv, 0, sizeof(ThreadVars));
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memset(p, 0, SIZE_OF_PACKET);
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p->pkt = (uint8_t *)(p + 1);
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DecodeEthernet(&tv, &dtv, p, raw_eth, sizeof(raw_eth), NULL);
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SCFree(p);
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return 0;
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}
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#endif /* UNITTESTS */
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/**
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* \brief Registers Ethernet unit tests
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* \todo More Ethernet tests
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*/
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void DecodeEthernetRegisterTests(void) {
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#ifdef UNITTESTS
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UtRegisterTest("DecodeEthernetTest01", DecodeEthernetTest01, 0);
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#endif /* UNITTESTS */
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}
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/**
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* @}
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*/
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