forked from osmocom/wireshark
![Michael Mann](/assets/img/avatar_default.png)
Several calls to proto_tree_add_uint_format_value could be better served using BASE_UNIT_STRING with a "unit string" in hf_ field. There also a few cases where proto_tree_add_uint_format_value could just be proto_tree_add_uint. Added a few more "common" unit string values to unit_strings.[ch] Change-Id: Iaedff82c515269c9c31ab9100dff19f5563c932d Reviewed-on: https://code.wireshark.org/review/19242 Petri-Dish: Michael Mann <mmann78@netscape.net> Reviewed-by: Michael Mann <mmann78@netscape.net>
373 lines
14 KiB
C
373 lines
14 KiB
C
/* packet-tdmop.c
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* Routines for TDM over Packet network disassembly
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* Copyright 2015, Andrew Chernyh <andew.chernyh@gmail.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/*
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* TDMoP protocol is proprietary protocol developed by "NSC Communication Siberia Ltd."
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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/*Using of ethertype 0x0808(assigned to Frame Realy ARP) was implemented in hardware, when ethertype was not assigned*/
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#define ETHERTYPE_TDMOP 0
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#define MAX_DCHANNEL_LEN 128
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void proto_register_tdmop(void);
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void proto_reg_handoff_tdmop(void);
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static int proto_tdmop = -1;
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static gint ett_tdmop = -1;
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static gint ett_tdmop_channel = -1;
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static int hf_tdmop_TransferID = -1;
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static int hf_tdmop_DstCh = -1;
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static int hf_tdmop_SrcCh = -1;
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static int hf_tdmop_Flags = -1;
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static int hf_tdmop_Flags_no_data = -1;
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static int hf_tdmop_Flags_lost_request = -1;
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static int hf_tdmop_Flags_remote_no_data = -1;
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static int hf_tdmop_Flags_compressed = -1;
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static int hd_tdmop_SrcDst = -1;
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static int hd_tdmop_SeqNum = -1;
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static int hd_tdmop_LastRecv = -1;
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static int hd_tdmop_Delay = -1;
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static int hd_tdmop_Reserved = -1;
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static int hf_tdmop_payload = -1;
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static int hf_tdmop_Compression_mask = -1;
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static dissector_handle_t lapd_handle = NULL;
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static gint pref_tdmop_d_channel = 16;
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static guint32 pref_tdmop_mask = 0xFFFFFFFFUL;
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static guint32 pref_tdmop_ethertype = ETHERTYPE_TDMOP;
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#define TDMOP_FLAG_NO_DATA (1<<3)
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#define TDMOP_FLAG_REMOTE_NO_DATA (1<<2)
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#define TDMOP_FLAG_COMPRESSED (1<<4)
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#define TDMOP_FLAG_LOST_REQUEST ((1<<3)|(0x02))
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static guint8 reverse_map[256]=
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{
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0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
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0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
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0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
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0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
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0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
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0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
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0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
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0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
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0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
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0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
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0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
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0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
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0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
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0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
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0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
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0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF
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};
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static int dissect_tdmop(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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guint8 dchannel_data[MAX_DCHANNEL_LEN];
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guint dchannel_len;
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guint8 flags;
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gint offset;
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proto_item *ti;
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proto_tree *tdmop_tree;
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guint32 dstch;
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guint32 srcch;
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flags = tvb_get_guint8(tvb, 4);
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offset = 0;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "TDMoP");
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col_clear(pinfo->cinfo, COL_INFO);
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if (flags & TDMOP_FLAG_LOST_REQUEST)
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{
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col_add_fstr(pinfo->cinfo, COL_INFO, "Lost Request");
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}
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/*conversation*/
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dstch = tvb_get_guint8(tvb, offset + 2);
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srcch = tvb_get_guint8(tvb, offset + 3);
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pinfo->destport = dstch;
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pinfo->srcport = srcch;
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pinfo->ptype = PT_TDMOP;
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ti = proto_tree_add_item(tree, proto_tdmop, tvb, 0, -1, ENC_NA);
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tdmop_tree = proto_item_add_subtree(ti, ett_tdmop);
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/*path info*/
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proto_tree_add_item(tdmop_tree, hf_tdmop_TransferID, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(tdmop_tree, hf_tdmop_DstCh, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tdmop_tree, hf_tdmop_SrcCh, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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/*flags*/
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proto_tree_add_item(tdmop_tree, hf_tdmop_Flags, tvb, offset, 1, ENC_NA);
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proto_tree_add_item(tdmop_tree, hf_tdmop_Flags_no_data, tvb, offset, 1, ENC_NA);
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proto_tree_add_item(tdmop_tree, hf_tdmop_Flags_lost_request, tvb, offset, 1, ENC_NA);
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proto_tree_add_item(tdmop_tree, hf_tdmop_Flags_remote_no_data, tvb, offset, 1, ENC_NA);
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proto_tree_add_item(tdmop_tree, hf_tdmop_Flags_compressed, tvb, offset, 1, ENC_NA);
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offset += 1;
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/*sequence and delay info*/
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proto_tree_add_item(tdmop_tree, hd_tdmop_SrcDst, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tdmop_tree, hd_tdmop_SeqNum, tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(tdmop_tree, hd_tdmop_LastRecv, tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(tdmop_tree, hd_tdmop_Delay, tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(tdmop_tree, hd_tdmop_Reserved, tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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if ((flags & TDMOP_FLAG_NO_DATA)==0)
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{
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gint len;
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gint blockid;
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dchannel_len=0;
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len=tvb_captured_length_remaining(tvb, 0);
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proto_tree_add_item(tdmop_tree, hf_tdmop_payload, tvb, offset, -1, ENC_NA);
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blockid=0;
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/*demux TDM stream*/
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while (offset<len)
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{
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proto_tree *currentblock = proto_tree_add_subtree_format(tdmop_tree, tvb, 0, 0, ett_tdmop_channel, 0, "Block %d", blockid);
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guint32 mask;
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gint i;
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gint j;
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blockid++;
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mask = pref_tdmop_mask; /*default mask is for timeslots 1-32*/
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if (flags&TDMOP_FLAG_COMPRESSED)
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{
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mask = tvb_get_letohl(tvb,offset);
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mask = ((mask >> 16) & 0xFFFF)|((mask & 0xFFFF) << 16);
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proto_tree_add_uint(currentblock, hf_tdmop_Compression_mask, tvb, offset, 4, mask);
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offset+=4;
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}
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for (i=0; i<32; i++)
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{
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if (mask & (1UL<<i))
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{
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proto_tree *subtree;
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tvbuff_t *cdata;
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subtree = proto_tree_add_subtree_format(currentblock, tvb, 0, 0, ett_tdmop_channel, 0, "Channel %d", i);
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cdata = tvb_new_subset_length(tvb, offset, 4);
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if (i==pref_tdmop_d_channel)
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{
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if (dchannel_len + 4 < MAX_DCHANNEL_LEN)
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{
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for (j = 0; j < 4; j++)
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{
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dchannel_data[dchannel_len+j]=reverse_map[tvb_get_guint8(cdata, j)];
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}
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dchannel_len += 4;
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}
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} else
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{
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call_data_dissector(cdata, pinfo, subtree);
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}
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offset += 4;
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}
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}
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}
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if (dchannel_len>0)
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{
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guint8 *buff = (guint8 *)wmem_memdup(pinfo->pool, dchannel_data, dchannel_len);
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tvbuff_t *new_tvb;
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new_tvb = tvb_new_child_real_data(tvb, buff, dchannel_len, dchannel_len);
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call_dissector(lapd_handle, new_tvb, pinfo, tree);
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}
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}
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return tvb_captured_length(tvb);
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}
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void proto_register_tdmop(void)
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{
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module_t *tdmop_module;
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static hf_register_info hf[] =
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{
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{
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&hf_tdmop_TransferID,
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{ "TDMoP Transfer ID", "tdmop.transferid",
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FT_UINT32, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL}
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},
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{
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&hf_tdmop_DstCh,
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{ "TDMoP Dst Ch", "tdmop.dstch",
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FT_UINT8, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL}
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},
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{
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&hf_tdmop_SrcCh,
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{ "TDMoP Src Ch", "tdmop.srcch",
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FT_UINT8, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL}
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},
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{
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&hf_tdmop_Flags,
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{ "TDMoP Flags", "tdmop.flags",
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FT_UINT8, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL}
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},
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{
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&hf_tdmop_Flags_lost_request,
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{ "TDMoP Lost Request Flag", "tdmop.flags.lostrequest",
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FT_BOOLEAN, 8,
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NULL, TDMOP_FLAG_LOST_REQUEST,
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NULL, HFILL}
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},
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{
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&hf_tdmop_Flags_no_data,
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{ "TDMoP No data flag", "tdmop.flags.nodata",
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FT_BOOLEAN, 8,
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NULL, TDMOP_FLAG_NO_DATA,
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NULL, HFILL}
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},
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{
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&hf_tdmop_Flags_remote_no_data,
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{ "TDMoP No data received from remote side flag", "tdmop.flags.remotenodata",
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FT_BOOLEAN, 8,
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NULL, TDMOP_FLAG_REMOTE_NO_DATA,
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NULL, HFILL}
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},
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{
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&hf_tdmop_Flags_compressed,
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{ "TDMoP compressed framed", "tdmop.flags.compressed",
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FT_BOOLEAN, 8,
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NULL, TDMOP_FLAG_COMPRESSED,
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NULL, HFILL}
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},
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{
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&hd_tdmop_SrcDst,
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{ "TDMoP Short SrcDst", "tdmop.srcdst",
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FT_UINT8, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL}
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},
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{
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&hd_tdmop_SeqNum,
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{ "TDMoP Sequence number", "tdmop.seqnum",
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FT_UINT16, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL}
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},
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{
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&hd_tdmop_LastRecv,
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{ "TDMoP Last Received number", "tdmop.recvnumber",
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FT_UINT16, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL}
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},
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{
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&hd_tdmop_Delay,
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{ "TDMoP Delay", "tdmop.delay",
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FT_UINT16, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL}
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},
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{
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&hd_tdmop_Reserved,
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{ "TDMoP Reserved", "tdmop.reserved",
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FT_UINT16, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL}
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},
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{
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&hf_tdmop_payload,
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{ "TDMoP Payload", "tdmop.payload",
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FT_BYTES, BASE_NONE,
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NULL, 0x0,
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NULL, HFILL}
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},
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{
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&hf_tdmop_Compression_mask,
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{ "TDMoP Compression mask", "tdmop.cmask",
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FT_UINT32, BASE_HEX,
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NULL, 0x0,
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NULL, HFILL}
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}
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};
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static gint *ett[] = {
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&ett_tdmop,
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&ett_tdmop_channel
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};
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proto_tdmop = proto_register_protocol ("TDMoP protocol", "TDMoP", "tdmop");
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proto_register_field_array(proto_tdmop, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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tdmop_module = prefs_register_protocol(proto_tdmop, proto_reg_handoff_tdmop);
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prefs_register_uint_preference(tdmop_module, "d_channel",
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"TDMoP D-Channel",
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"The TDMoD channel that contains the D-Channel.",
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10, &pref_tdmop_d_channel);
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prefs_register_uint_preference(tdmop_module, "ts_mask",
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"TDMoP default timeslot mask",
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"The bitmask of channels in uncompressed TDMoP frame",
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16, &pref_tdmop_mask);
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prefs_register_uint_preference(tdmop_module, "ethertype",
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"Ethertype for TDMoP stream(Usually 0808)",
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"The ethertype assigned to TDMoP (without IP/UDP) stream",
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16, &pref_tdmop_ethertype);
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}
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void proto_reg_handoff_tdmop(void)
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{
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static dissector_handle_t tdmop_handle;
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static gboolean init = FALSE;
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static guint32 current_tdmop_ethertype;
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if (!init)
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{
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tdmop_handle = create_dissector_handle(dissect_tdmop, proto_tdmop);
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dissector_add_for_decode_as_with_preference("udp.port", tdmop_handle);
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if (pref_tdmop_ethertype) {
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dissector_add_uint("ethertype", pref_tdmop_ethertype, tdmop_handle);
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}
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lapd_handle = find_dissector_add_dependency("lapd-bitstream", proto_tdmop);
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current_tdmop_ethertype = pref_tdmop_ethertype;
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init = TRUE;
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}
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if (current_tdmop_ethertype != pref_tdmop_ethertype)
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{
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dissector_delete_uint("ethertype", current_tdmop_ethertype, tdmop_handle);
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if (pref_tdmop_ethertype) {
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dissector_add_uint("ethertype", pref_tdmop_ethertype, tdmop_handle);
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}
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current_tdmop_ethertype = pref_tdmop_ethertype;
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}
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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