![Bill Meier](/assets/img/avatar_default.png)
Change-Id: I1ad94654343e5a018a0b3159481d45ffb3a91263 Reviewed-on: https://code.wireshark.org/review/4363 Reviewed-by: Bill Meier <wmeier@newsguy.com>
304 lines
8.8 KiB
C
304 lines
8.8 KiB
C
/* packet-lanforge.c
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* Routines for "LANforge traffic generator IP protocol" dissection
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* Copyright 2008
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* Ben Greear <greearb@candelatech.com>
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*
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* Based on pktgen dissectory by:
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* Francesco Fondelli <francesco dot fondelli, gmail dot 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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/* LANforge generates network traffic for load & performance testing.
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* See http://www.candelatech.com for more info.
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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void proto_register_lanforge(void);
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void proto_reg_handoff_lanforge(void);
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/* magic num used for heuristic */
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#define LANFORGE_MAGIC 0x1a2b3c4d
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/* Initialize the protocol and registered fields */
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static int proto_lanforge = -1;
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/* lanforge header */
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static int hf_lanforge_crc = -1;
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static int hf_lanforge_magic = -1;
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static int hf_lanforge_src_session = -1;
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static int hf_lanforge_dst_session = -1;
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static int hf_lanforge_pld_len_l = -1;
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static int hf_lanforge_pld_len_h = -1;
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static int hf_lanforge_pld_len = -1;
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static int hf_lanforge_pld_pattern = -1;
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static int hf_lanforge_seq = -1;
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static int hf_lanforge_tx_time_s = -1;
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static int hf_lanforge_tx_time_ns = -1;
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static int hf_lanforge_timestamp = -1;
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/* Initialize the subtree pointer */
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static gint ett_lanforge = -1;
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/* data dissector handle */
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static dissector_handle_t data_handle;
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/* entry point */
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static gboolean dissect_lanforge(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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proto_item *ti;
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proto_item *tmp;
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proto_tree *lanforge_tree;
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guint32 offset = 0;
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nstime_t tstamp;
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guint32 tss;
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guint32 tmpi;
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guint32 pld_len, magic;
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/* check for min size */
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if(tvb_length(tvb) < 28) { /* Not a LANforge packet. */
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return FALSE;
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}
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/* check for magic number */
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magic = tvb_get_ntohl(tvb,0);
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if(magic != LANFORGE_MAGIC){
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/* Not a LANforge packet. */
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return FALSE;
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}
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/* Make entries in Protocol column and Info column on summary display */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "LANforge");
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col_add_fstr(pinfo->cinfo, COL_INFO, "Seq: %u", tvb_get_ntohl(tvb, 16));
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if(tree) {
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_lanforge, tvb, 0, -1, ENC_NA);
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lanforge_tree = proto_item_add_subtree(ti, ett_lanforge);
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/* add items to the subtree */
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proto_tree_add_item(lanforge_tree, hf_lanforge_crc, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset+=4;
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proto_tree_add_item(lanforge_tree, hf_lanforge_magic, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset+=4;
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proto_tree_add_item(lanforge_tree, hf_lanforge_src_session, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset+=2;
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proto_tree_add_item(lanforge_tree, hf_lanforge_dst_session, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset+=2;
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pld_len = tvb_get_ntohs(tvb, offset);
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tmp = proto_tree_add_item(lanforge_tree, hf_lanforge_pld_len_l, tvb, offset, 2, ENC_BIG_ENDIAN);
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PROTO_ITEM_SET_GENERATED(tmp);
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offset+=2;
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tmpi = tvb_get_guint8(tvb, offset);
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tmp = proto_tree_add_item(lanforge_tree, hf_lanforge_pld_len_h, tvb, offset, 1, ENC_BIG_ENDIAN);
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PROTO_ITEM_SET_GENERATED(tmp);
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offset+=1;
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pld_len |= (tmpi << 16);
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proto_tree_add_uint(lanforge_tree, hf_lanforge_pld_len, tvb, offset-3, 3, pld_len);
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proto_tree_add_item(lanforge_tree, hf_lanforge_pld_pattern, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset+=1;
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proto_tree_add_item(lanforge_tree, hf_lanforge_seq, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset+=4;
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tss = tvb_get_ntohl(tvb, offset);
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tstamp.secs = tss;
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tmp = proto_tree_add_item(lanforge_tree, hf_lanforge_tx_time_s, tvb, offset, 4, ENC_BIG_ENDIAN);
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PROTO_ITEM_SET_GENERATED(tmp);
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offset+=4;
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tss = tvb_get_ntohl(tvb, offset);
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tstamp.nsecs = tss;
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tmp = proto_tree_add_item(lanforge_tree, hf_lanforge_tx_time_ns, tvb, offset, 4, ENC_BIG_ENDIAN);
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PROTO_ITEM_SET_GENERATED(tmp);
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offset+=4;
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proto_tree_add_time(lanforge_tree, hf_lanforge_timestamp, tvb, offset - 8, 8, &tstamp);
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if(tvb_reported_length_remaining(tvb, offset) > 0) /* random data */
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call_dissector(data_handle, tvb_new_subset_remaining(tvb, offset), pinfo,
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lanforge_tree);
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}
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return TRUE;
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}
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/* Register the protocol with Wireshark */
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void proto_register_lanforge(void)
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{
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/* Setup list of header fields */
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static hf_register_info hf[] = {
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{ &hf_lanforge_crc,
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{
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"CRC", "lanforge.CRC",
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FT_UINT32, BASE_HEX, NULL, 0x0,
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"The LANforge CRC number", HFILL
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}
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},
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{ &hf_lanforge_magic,
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{
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"Magic number", "lanforge.magic",
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FT_UINT32, BASE_HEX, NULL, 0x0,
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"The LANforge magic number", HFILL
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}
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},
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{ &hf_lanforge_src_session,
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{
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"Source session ID", "lanforge.source-session-id",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"The LANforge source session ID", HFILL
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}
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},
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{ &hf_lanforge_dst_session,
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{
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"Dest session ID", "lanforge.dest-session-id",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"The LANforge dest session ID", HFILL
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}
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},
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{ &hf_lanforge_pld_len_l,
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{
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"Payload Length(L)", "lanforge.pld-len-L",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"The LANforge payload length (low bytes)", HFILL
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}
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},
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{ &hf_lanforge_pld_len_h,
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{
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"Payload Length(H)", "lanforge.pld-len-H",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"The LANforge payload length (high byte)", HFILL
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}
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},
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{ &hf_lanforge_pld_len,
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{
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"Payload Length", "lanforge.pld-length",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"The LANforge payload length", HFILL
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}
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},
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{ &hf_lanforge_pld_pattern,
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{
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"Payload Pattern", "lanforge.pld-pattern",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"The LANforge payload pattern", HFILL
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}
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},
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{ &hf_lanforge_seq,
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{
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"Sequence Number", "lanforge.seqno",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"The LANforge Sequence Number", HFILL
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}
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},
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{ &hf_lanforge_tx_time_s,
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{
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"Timestamp Secs", "lanforge.ts-secs",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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NULL, HFILL
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}
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},
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{ &hf_lanforge_tx_time_ns,
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{
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"Timestamp nsecs", "lanforge.ts-nsecs",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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NULL, HFILL
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}
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},
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{ &hf_lanforge_timestamp,
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{
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"Timestamp", "lanforge.timestamp",
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FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x0,
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NULL, HFILL
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}
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}
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_lanforge
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};
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/* Register the protocol name and description */
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proto_lanforge = proto_register_protocol("LANforge Traffic Generator", "LANforge", "lanforge");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_lanforge, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void proto_reg_handoff_lanforge(void)
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{
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/* Register as a heuristic UDP dissector */
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heur_dissector_add("udp", dissect_lanforge, proto_lanforge);
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heur_dissector_add("tcp", dissect_lanforge, proto_lanforge);
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/* Find data dissector handle */
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data_handle = find_dissector("data");
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}
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/*
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* Editor modelines - http://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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