524a84b5e9
length, we can't get the segment length (although we can at least try to dissect the header). If that's the case, put in Ronnie's "short segment" note. Also, put into the information we pass to TCP taps an indication of whether the segment length is valid or not. svn path=/trunk/; revision=7705
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/* packet-tcp.h
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*
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* $Id: packet-tcp.h,v 1.16 2003/05/21 06:28:03 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __PACKET_TCP_H__
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#define __PACKET_TCP_H__
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/* TCP flags */
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#define TH_FIN 0x01
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#define TH_SYN 0x02
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#define TH_RST 0x04
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#define TH_PUSH 0x08
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#define TH_ACK 0x10
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#define TH_URG 0x20
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#define TH_ECN 0x40
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#define TH_CWR 0x80
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/* the tcp header structure, passed to tap listeners */
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struct tcpheader {
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guint32 th_seq;
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guint32 th_ack;
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gboolean th_have_seglen; /* TRUE if th_seglen is valid */
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guint32 th_seglen;
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guint16 th_win;
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guint16 th_sport;
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guint16 th_dport;
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guint8 th_hlen;
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guint8 th_flags;
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/* this can either be ipv4 or ipv6, make sure you know which
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one you get. */
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void *ip_header;
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};
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/*
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* Private data passed from the TCP dissector to subdissectors.
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*/
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struct tcpinfo {
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guint32 seq; /* Sequence number of first byte in the data */
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gboolean is_reassembled; /* This is reassembled data. */
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gboolean urgent; /* TRUE if "urgent_pointer" is valid */
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guint16 urgent_pointer; /* Urgent pointer value for the current packet. */
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};
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/*
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* Loop for dissecting PDUs within a TCP stream; assumes that a PDU
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* consists of a fixed-length chunk of data that contains enough information
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* to determine the length of the PDU, followed by rest of the PDU.
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*
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* The first three arguments are the arguments passed to the dissector
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* that calls this routine.
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*
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* "proto_desegment" is the dissector's flag controlling whether it should
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* desegment PDUs that cross TCP segment boundaries.
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*
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* "fixed_len" is the length of the fixed-length part of the PDU.
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*
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* "get_pdu_len()" is a routine called to get the length of the PDU from
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* the fixed-length part of the PDU; it's passed "tvb" and "offset".
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*
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* "dissect_pdu()" is the routine to dissect a PDU.
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*/
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extern void
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tcp_dissect_pdus(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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gboolean proto_desegment, guint fixed_len,
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guint (*get_pdu_len)(tvbuff_t *, int),
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void (*dissect_pdu)(tvbuff_t *, packet_info *, proto_tree *));
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extern void decode_tcp_ports(tvbuff_t *, int, packet_info *,
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proto_tree *, int, int, guint32);
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#endif
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