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81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/* Copyright (C) 2011-2021 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 Eric Leblond <eric@regit.org>
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*
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* Decode SCTP
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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-sctp.h"
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#include "decode-events.h"
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#include "util-validate.h"
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#include "util-unittest.h"
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#include "util-debug.h"
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#include "util-optimize.h"
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#include "flow.h"
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static int DecodeSCTPPacket(ThreadVars *tv, Packet *p, const uint8_t *pkt, uint16_t len)
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{
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DEBUG_VALIDATE_BUG_ON(pkt == NULL);
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if (unlikely(len < SCTP_HEADER_LEN)) {
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ENGINE_SET_INVALID_EVENT(p, SCTP_PKT_TOO_SMALL);
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return -1;
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}
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SCTPHdr *sctph = PacketSetSCTP(p, pkt);
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p->sp = SCNtohs(sctph->sh_sport);
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p->dp = SCNtohs(sctph->sh_dport);
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p->payload = (uint8_t *)pkt + sizeof(SCTPHdr);
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p->payload_len = len - sizeof(SCTPHdr);
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p->proto = IPPROTO_SCTP;
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return 0;
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}
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int DecodeSCTP(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p,
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const uint8_t *pkt, uint16_t len)
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{
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StatsIncr(tv, dtv->counter_sctp);
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if (unlikely(DecodeSCTPPacket(tv, p,pkt,len) < 0)) {
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PacketClearL4(p);
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return TM_ECODE_FAILED;
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}
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SCLogDebug("SCTP sp: %u -> dp: %u", p->sp, p->dp);
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FlowSetupPacket(p);
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return TM_ECODE_OK;
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}
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/**
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* @}
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*/
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