epan/dissectors/packet-sdp.h

   1 /* packet-sdp.h
   2  * Routines for SDP packet disassembly (RFC 2327)
   3  *
   4  * Jason Lango <jal@netapp.com>
   5  * Liberally copied from packet-http.c, by Guy Harris <guy@alum.mit.edu>
   6  * 2005 Alejandro Vaquero <alejandro.vaquero@verso.com>, add support for tap
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * SPDX-License-Identifier: GPL-2.0-or-later
  13  */
  14
  15 #ifndef __PACKET_SDP_H__
  16 #define __PACKET_SDP_H__
  17
  18 typedef struct _sdp_packet_info {
  19         char summary_str[50];      /* SDP summary string for VoIP calls graph analysis */
  20 } sdp_packet_info;
  21
  22 enum sdp_exchange_type
  23 {
  24         SDP_EXCHANGE_OFFER = 0,
  25         SDP_EXCHANGE_ANSWER_ACCEPT,
  26         SDP_EXCHANGE_ANSWER_REJECT
  27 };
  28
  29 enum sdp_trace_id_hf_type
  30 {
  31     SDP_TRACE_ID_HF_TYPE_STR = 0, /* */
  32     SDP_TRACE_ID_HF_TYPE_UINT32 /* */
  33 };
  34
  35 /*
  36  *  Information needed to set up a trace id in RTP(t ex SIP CallId )
  37  */
  38 #define SDP_INFO_OFFSET 10 /* Max number of SDP data occurrences in a single frame */
  39
  40 typedef struct _sdp_setup_info {
  41     int  hf_id;                         /* Header field to use */
  42     enum sdp_trace_id_hf_type hf_type;  /* Indicates which of the following variables to use( add uint32_t etc as needed)*/
  43     bool add_hidden;
  44     bool is_osmux;
  45     union {
  46         char   *str;                    /* The trace id if the hf_type is str */
  47         uint32_t num;                    /* Numerical trace id */
  48     } trace_id;
  49 } sdp_setup_info_t;
  50
  51 extern void setup_sdp_transport(tvbuff_t *tvb, packet_info *pinfo, enum sdp_exchange_type type, int request_frame, const bool delay, sdp_setup_info_t *setup_info);
  52 /* Handles duplicate OFFER packets so they don't end up processed by dissect_sdp().  This can probably
  53  * be removed when all higher layer dissectors properly handle SDP themselves with setup_sdp_transport()
  54  */
  55 extern void setup_sdp_transport_resend(int current_frame, int request_frame);
  56
  57 #endif /* __PACKET_SDP_H__ */