nexmon – Rev 1
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/* packet-mint.c
* Routines for the disassembly of the Chantry/HiPath AP-Controller
* tunneling protocol.
*
* Copyright 2013 Joerg Mayer (see AUTHORS file)
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* Motorola/Symbol WLAN proprietary protocol
* http://www.awimobility.com/s.nl/ctype.KB/it.I/id.7761/KB.81/.f
* looks like a mixture of lwapp/capwap and is-is/ospf
*/
/* We don't want the tranported data to pollute the output until
* we know how to correctly determine the packet type and length
*/
#define MINT_DEVELOPMENT 1
#define NEW_PROTO_TREE_API 1
#include "config.h"
#include <epan/packet.h>
#include <epan/exceptions.h>
#include <epan/etypes.h>
#include <epan/show_exception.h>
void proto_register_mint(void);
void proto_reg_handoff_mint(void);
#define PROTO_SHORT_NAME "MiNT"
#define PROTO_LONG_NAME "Media independent Network Transport"
/* 0x8783 ETHERTYPE_MINT */
/* 0x6000 */
#define PORT_MINT_CONTROL_TUNNEL 24576
/* 0x6001 */
#define PORT_MINT_DATA_TUNNEL 24577
static dissector_handle_t eth_handle;
/* ett handles */
static int ett_mint_ethshim = -1;
static int ett_mint = -1;
static int ett_mint_header = -1;
static int ett_mint_ctrl = -1;
static int ett_mint_data = -1;
static dissector_handle_t mint_control_handle;
static dissector_handle_t mint_data_handle;
static dissector_handle_t mint_eth_handle;
typedef enum {
MINT_TYPE_DATA_UC = 0x01,
MINT_TYPE_DATA_BCMC = 0x02,
MINT_TYPE_CTRL_0x0c = 0x0c,
MINT_TYPE_CTRL_0x0e = 0x0e,
MINT_TYPE_CTRL_0x1e = 0x1e,
MINT_TYPE_ETH_0x22 = 0x22
} mint_packettype_t;
static const value_string mint_packettype_vals[] = {
{ MINT_TYPE_DATA_UC, "Unicast data"},
{ MINT_TYPE_DATA_BCMC, "BC/MC data"},
{ MINT_TYPE_CTRL_0x0c, "Ctrl_0x0c"},
{ MINT_TYPE_CTRL_0x0e, "Ctrl_0x0e"},
{ MINT_TYPE_CTRL_0x1e, "Ctrl_0x1e"},
{ MINT_TYPE_ETH_0x22, "Eth_0x22"},
{ 0, NULL }
};
static const value_string mint_0x0c_csnp_tlv_vals[] = {
{ 0, NULL }
};
static const value_string mint_0x0c_helo_tlv_vals[] = {
{ 1, "MiNT ID" },
{ 8, "IPv4 address" },
{ 0, NULL }
};
static const value_string mint_0x0c_lsp_tlv_vals[] = {
{ 8, "MiNT ID" },
{ 0, NULL }
};
static const value_string mint_0x0c_psnp_tlv_vals[] = {
{ 0, NULL }
};
static const value_string mint_0x22_tlv_vals[] = {
{ 0, NULL }
};
/* hfi elements */
#define MINT_HF_INIT HFI_INIT(proto_mint)
static header_field_info *hfi_mint = NULL;
/* MiNT Eth Shim */
static header_field_info hfi_mint_ethshim MINT_HF_INIT =
{ "MiNT Ethernet Shim", "mint.ethshim", FT_PROTOCOL, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_ethshim_unknown MINT_HF_INIT =
{ "Unknown", "mint.ethshim.unknown", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_ethshim_length MINT_HF_INIT =
{ "Length", "mint.ethshim.length", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL };
/* MiNT common */
static header_field_info hfi_mint_header MINT_HF_INIT =
{ "Header", "mint.header", FT_PROTOCOL, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_header_unknown1 MINT_HF_INIT =
{ "HdrUnk1", "mint.header.unknown1", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_header_srcid MINT_HF_INIT =
{ "Src MiNT ID", "mint.header.srcid", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_header_dstid MINT_HF_INIT =
{ "Dst MiNT ID", "mint.header.dstid", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_header_srcdatatype MINT_HF_INIT =
{ "Src type", "mint.header.srctype", FT_UINT16, BASE_DEC, VALS(mint_packettype_vals),
0x0, NULL, HFILL };
static header_field_info hfi_mint_header_dstdatatype MINT_HF_INIT =
{ "Dst type", "mint.header.dsttype", FT_UINT16, BASE_DEC, VALS(mint_packettype_vals),
0x0, NULL, HFILL };
/* MiNT Data */
static header_field_info hfi_mint_data MINT_HF_INIT =
{ "Data Frame", "mint.data", FT_PROTOCOL, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_data_vlan MINT_HF_INIT =
{ "Data VLAN", "mint.data.vlan", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_data_seqno MINT_HF_INIT =
{ "Sequence Number", "mint.data.seqno", FT_UINT32, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_data_unknown1 MINT_HF_INIT =
{ "DataUnk1", "mint.data.unknown1", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
/* MiNT Control common */
static header_field_info hfi_mint_control MINT_HF_INIT =
{ "Control Frame", "mint.control", FT_PROTOCOL, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_32zerobytes MINT_HF_INIT =
{ "Zero Bytes", "mint.control.32zerobytes", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_unknown1 MINT_HF_INIT =
{ "CtrlUnk1", "mint.control.unknown1", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
/* MiNT Control type 0x0c */
static header_field_info hfi_mint_control_0x0c_unknown1 MINT_HF_INIT =
{ "Unknown1", "mint.control.0x0c.unknown1", FT_UINT8, BASE_HEX, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_unknown2 MINT_HF_INIT =
{ "Unknown2", "mint.control.0x0c.unknown2", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_unknown3 MINT_HF_INIT =
{ "Unknown3", "mint.control.0x0c.unknown3", FT_UINT8, BASE_HEX, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_header_length MINT_HF_INIT =
{ "Headerlength", "mint.control.0x0c.header.length", FT_UINT8, BASE_HEX, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_message_type MINT_HF_INIT =
{ "Message type", "mint.control.0x0c.message.type", FT_STRING, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_header_sender MINT_HF_INIT =
{ "Sender ID", "mint.control.0x0c.header.sender", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_header_unknown MINT_HF_INIT =
{ "Header unknown", "mint.control.0x0c.header.unknown", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_type_unknown MINT_HF_INIT =
{ "TLV Type", "mint.control.0x0c.tlvtype", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_type_csnp MINT_HF_INIT =
{ "TLV Type", "mint.control.0x0c.tlvtype", FT_UINT8, BASE_DEC, VALS(mint_0x0c_csnp_tlv_vals),
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_type_helo MINT_HF_INIT =
{ "TLV Type", "mint.control.0x0c.tlvtype", FT_UINT8, BASE_DEC, VALS(mint_0x0c_helo_tlv_vals),
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_type_lsp MINT_HF_INIT =
{ "TLV Type", "mint.control.0x0c.tlvtype", FT_UINT8, BASE_DEC, VALS(mint_0x0c_lsp_tlv_vals),
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_type_psnp MINT_HF_INIT =
{ "TLV Type", "mint.control.0x0c.tlvtype", FT_UINT8, BASE_DEC, VALS(mint_0x0c_psnp_tlv_vals),
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_length MINT_HF_INIT =
{ "TLV Length", "mint.control.0x0c.tlvlength", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_array MINT_HF_INIT =
{ "Array indicator", "mint.control.0x0c.array", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_element MINT_HF_INIT =
{ "Array element", "mint.control.0x0c.element", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x0c_value MINT_HF_INIT =
{ "TLV Value", "mint.control.0x0c.tlvvalue", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
/* MiNT Control type 0x1e */
static header_field_info hfi_mint_control_0x1e_unknown MINT_HF_INIT =
{ "Unknown", "mint.control.0x22.unknown", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
/* MiNT Control type 0x22 */
static header_field_info hfi_mint_control_0x22_message MINT_HF_INIT =
{ "Message", "mint.control.0x22.message", FT_UINT16, BASE_HEX, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x22_type MINT_HF_INIT =
{ "TLV Type", "mint.control.0x22.tlvtype", FT_UINT8, BASE_DEC, VALS(mint_0x22_tlv_vals),
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x22_length MINT_HF_INIT =
{ "TLV Length", "mint.control.0x22.tlvlength", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_mint_control_0x22_value MINT_HF_INIT =
{ "TLV Value", "mint.control.0x22.tlvvalue", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL };
/* End hfi elements */
static int
dissect_eth_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *mint_tree,
volatile guint32 offset, guint32 length)
{
tvbuff_t *eth_tvb;
#ifdef MINT_DEVELOPMENT
col_set_writable(pinfo->cinfo, -1, FALSE);
#endif
eth_tvb = tvb_new_subset_length(tvb, offset, length);
/* Continue after Ethernet dissection errors */
TRY {
call_dissector(eth_handle, eth_tvb, pinfo, mint_tree);
} CATCH_NONFATAL_ERRORS {
show_exception(eth_tvb, pinfo, mint_tree, EXCEPT_CODE, GET_MESSAGE);
} ENDTRY;
offset += length;
#ifdef MINT_DEVELOPMENT
col_set_writable(pinfo->cinfo, -1, TRUE);
#endif
return offset;
}
static int
dissect_mint_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
guint32 offset, guint32 packet_length, guint received_via)
{
proto_item *ti;
proto_tree *mint_tree = NULL;
proto_tree *mint_header_tree = NULL;
proto_tree *mint_data_tree = NULL;
proto_tree *mint_ctrl_tree = NULL;
guint16 bytes_remaining;
guint16 packet_type;
guint8 type, length, header_length;
guint32 message_type;
guint8 element_length;
static header_field_info *display_hfi_tlv_vals;
packet_type = tvb_get_ntohs(tvb, offset + 12);
col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
col_add_str(pinfo->cinfo, COL_INFO, val_to_str(packet_type,
mint_packettype_vals, "Type 0x%02x"));
ti = proto_tree_add_item(tree, hfi_mint, tvb,
offset, packet_length, ENC_NA);
mint_tree = proto_item_add_subtree(ti, ett_mint);
ti = proto_tree_add_item(mint_tree, &hfi_mint_header, tvb,
offset, 16, ENC_NA);
mint_header_tree = proto_item_add_subtree(ti, ett_mint_header);
/* MiNT header */
proto_tree_add_item(mint_header_tree, &hfi_mint_header_unknown1, tvb,
offset, 4, ENC_NA);
offset += 4;
proto_tree_add_item(mint_header_tree, &hfi_mint_header_dstid, tvb,
offset, 4, ENC_NA);
offset += 4;
proto_tree_add_item(mint_header_tree, &hfi_mint_header_srcid, tvb,
offset, 4, ENC_NA);
offset += 4;
proto_tree_add_item(mint_header_tree, &hfi_mint_header_dstdatatype, tvb,
offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(mint_header_tree, &hfi_mint_header_srcdatatype, tvb,
offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* FIXME: This is probably not the right way to determine the packet type.
* It's more likely something in mint_header_unknown1 but I haven't
* found out what. */
switch(packet_type) {
case MINT_TYPE_DATA_UC:
ti = proto_tree_add_item(mint_tree, &hfi_mint_data, tvb,
offset, packet_length - 16, ENC_NA);
mint_data_tree = proto_item_add_subtree(ti, ett_mint_data);
proto_tree_add_item(mint_data_tree, &hfi_mint_data_unknown1, tvb,
offset, 2, ENC_NA);
offset += 2;
/* Transported user frame */
if (offset < packet_length)
offset += dissect_eth_frame(tvb, pinfo, tree,
offset, packet_length - offset);
break;
case MINT_TYPE_DATA_BCMC:
ti = proto_tree_add_item(mint_tree, &hfi_mint_data, tvb,
offset, packet_length - 16, ENC_NA);
mint_data_tree = proto_item_add_subtree(ti, ett_mint_data);
/* Decode as vlan only for now. To be verified against a capture
* with CoS != 0 */
proto_tree_add_item(mint_data_tree, &hfi_mint_data_vlan, tvb,
offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(mint_data_tree, &hfi_mint_data_seqno, tvb,
offset, 4, ENC_NA);
offset += 4;
proto_tree_add_item(mint_data_tree, &hfi_mint_data_unknown1, tvb,
offset, 4, ENC_NA);
offset += 4;
/* Transported user frame */
if (offset < packet_length)
offset += dissect_eth_frame(tvb, pinfo, tree,
offset, packet_length - offset);
break;
case MINT_TYPE_CTRL_0x0c:
ti = proto_tree_add_item(mint_tree, &hfi_mint_control, tvb,
offset, packet_length - 16, ENC_NA);
mint_ctrl_tree = proto_item_add_subtree(ti, ett_mint_ctrl);
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_32zerobytes, tvb,
offset, 32, ENC_NA);
offset += 32;
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_unknown1, tvb,
offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_unknown2, tvb,
offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_unknown3, tvb,
offset, 1, ENC_NA);
offset += 1;
header_length = tvb_get_guint8(tvb, offset);
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_header_length, tvb,
offset, 1, ENC_NA);
offset += 1;
message_type = tvb_get_ntohl(tvb, offset);
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_message_type, tvb,
offset, 4, ENC_NA);
offset += 4;
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_header_sender, tvb,
offset, 4, ENC_NA);
offset += 4;
switch (message_type) {
case 0x43534E50: /* CSNP */
element_length = 12;
display_hfi_tlv_vals = &hfi_mint_control_0x0c_type_csnp;
break;
case 0x48454C4F: /* HELO */
element_length = 0;
display_hfi_tlv_vals = &hfi_mint_control_0x0c_type_helo;
break;
case 0x4C535000: /* LSP */
element_length = 8;
display_hfi_tlv_vals = &hfi_mint_control_0x0c_type_lsp;
break;
case 0x50534E50: /* PSNP */
element_length = 4;
display_hfi_tlv_vals = &hfi_mint_control_0x0c_type_psnp;
break;
default:
element_length = 0;
display_hfi_tlv_vals = &hfi_mint_control_0x0c_type_unknown;
}
/* FIXME: This should go into the per message_type switch above */
if (header_length > 12) {
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_header_unknown, tvb,
offset, header_length - 12, ENC_NA);
offset += header_length - 12;
}
while (offset < packet_length - 2) {
type = tvb_get_guint8(tvb, offset);
proto_tree_add_item(mint_ctrl_tree, display_hfi_tlv_vals, tvb,
offset, 1, ENC_NA);
offset += 1;
length = tvb_get_guint8(tvb, offset);
/* FIXME: This is a hack - reliable array detection missing */
if (type == 1 && length == 128) {
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_array, tvb,
offset, 1, ENC_NA);
offset += 1;
length = tvb_get_guint8(tvb, offset);
}
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_length, tvb,
offset, 1, ENC_NA);
offset += 1;
if (offset + length > packet_length) {
/* FIXME: print expert information */
break;
}
if (type == 1 && element_length) {
guint32 end_offset = offset + length;
for (; offset < end_offset; offset += element_length) {
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_element, tvb,
offset, element_length, ENC_NA);
}
} else {
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x0c_value, tvb,
offset, length, ENC_NA);
offset += length;
}
}
break;
case MINT_TYPE_CTRL_0x1e:
ti = proto_tree_add_item(mint_tree, &hfi_mint_control, tvb,
offset, packet_length - 16, ENC_NA);
mint_ctrl_tree = proto_item_add_subtree(ti, ett_mint_ctrl);
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_32zerobytes, tvb,
offset, 32, ENC_NA);
offset += 32;
bytes_remaining = packet_length - offset;
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x1e_unknown, tvb,
offset, bytes_remaining, ENC_NA);
offset += bytes_remaining;
break;
case MINT_TYPE_ETH_0x22:
ti = proto_tree_add_item(mint_tree, &hfi_mint_control, tvb,
offset, packet_length - 16, ENC_NA);
mint_ctrl_tree = proto_item_add_subtree(ti, ett_mint_ctrl);
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_32zerobytes, tvb,
offset, 32, ENC_NA);
offset += 32;
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x22_message, tvb,
offset, 2, ENC_BIG_ENDIAN);
offset += 2;
while (offset < packet_length - 2) {
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x22_type, tvb,
offset, 1, ENC_NA);
offset += 1;
length = tvb_get_guint8(tvb, offset);
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x22_length, tvb,
offset, 1, ENC_NA);
offset += 1;
if (offset + length > packet_length) {
/* print expert information */
break;
}
proto_tree_add_item(mint_ctrl_tree, &hfi_mint_control_0x22_value, tvb,
offset, length, ENC_NA);
offset += length;
}
break;
default:
bytes_remaining = packet_length - offset;
switch(received_via) {
case PORT_MINT_CONTROL_TUNNEL:
case ETHERTYPE_MINT:
proto_tree_add_item(mint_tree, &hfi_mint_control_unknown1, tvb,
offset, bytes_remaining, ENC_NA);
break;
case PORT_MINT_DATA_TUNNEL:
proto_tree_add_item(mint_tree, &hfi_mint_data_unknown1, tvb,
offset, bytes_remaining, ENC_NA);
break;
default:
DISSECTOR_ASSERT_NOT_REACHED();
}
offset += bytes_remaining;
break;
}
#if defined MINT_DEVELOPMENT
tree_expanded_set(ett_mint, TRUE);
tree_expanded_set(ett_mint_ethshim, TRUE);
tree_expanded_set(ett_mint_header, TRUE);
tree_expanded_set(ett_mint_ctrl, TRUE);
tree_expanded_set(ett_mint_data, TRUE);
#endif
return offset;
}
static int
dissect_mint_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint32 packet_length = tvb_captured_length(tvb);
return dissect_mint_common(tvb, pinfo, tree, 0, packet_length,
PORT_MINT_CONTROL_TUNNEL);
}
static int
dissect_mint_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint32 packet_length = tvb_captured_length(tvb);
return dissect_mint_common(tvb, pinfo, tree, 0, packet_length,
PORT_MINT_DATA_TUNNEL);
}
static int
dissect_mint_ethshim(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti;
proto_tree *mint_ethshim_tree = NULL;
guint32 offset = 0;
guint32 packet_length;
ti = proto_tree_add_item(tree, &hfi_mint_ethshim, tvb,
offset, 4, ENC_NA);
mint_ethshim_tree = proto_item_add_subtree(ti, ett_mint_ethshim);
proto_tree_add_item(mint_ethshim_tree, &hfi_mint_ethshim_unknown, tvb,
offset, 2, ENC_NA);
offset += 2;
proto_tree_add_item(mint_ethshim_tree, &hfi_mint_ethshim_length, tvb,
offset, 2, ENC_BIG_ENDIAN);
packet_length = tvb_get_ntohs(tvb, offset) + 4;
offset += 2;
offset += dissect_mint_common(tvb, pinfo, tree, 4, packet_length, ETHERTYPE_MINT);
return offset;
}
static gboolean
test_mint_control(tvbuff_t *tvb _U_)
{
#if 0
/* Minimum of 8 bytes, first byte (version) has value of 3 */
if ( tvb_length(tvb) < 8
|| tvb_get_guint8(tvb, 0) != 3
/* || tvb_get_guint8(tvb, 2) != 0
|| tvb_get_ntohs(tvb, 6) > tvb_reported_length(tvb) */
) {
return FALSE;
}
#endif
return TRUE;
}
static gboolean
test_mint_data(tvbuff_t *tvb _U_)
{
#if 0
/* Minimum of 8 bytes, first byte (version) has value of 3 */
if ( tvb_length(tvb) < 8
|| tvb_get_guint8(tvb, 0) != 3
/* || tvb_get_guint8(tvb, 2) != 0
|| tvb_get_ntohs(tvb, 6) > tvb_reported_length(tvb) */
) {
return FALSE;
}
#endif
return TRUE;
}
static gboolean
test_mint_eth(tvbuff_t *tvb _U_)
{
#if 0
/* Minimum of 8 bytes, first byte (version) has value of 3 */
if ( tvb_length(tvb) < 8
|| tvb_get_guint8(tvb, 0) != 3
/* || tvb_get_guint8(tvb, 2) != 0
|| tvb_get_ntohs(tvb, 6) > tvb_reported_length(tvb) */
) {
return FALSE;
}
#endif
return TRUE;
}
static int
dissect_mint_control_static(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
if ( !test_mint_control(tvb) ) {
return 0;
}
return dissect_mint_control(tvb, pinfo, tree);
}
static int
dissect_mint_data_static(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
if ( !test_mint_data(tvb) ) {
return 0;
}
return dissect_mint_data(tvb, pinfo, tree);
}
static int
dissect_mint_ethshim_static(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
if ( !test_mint_eth(tvb) ) {
return 0;
}
return dissect_mint_ethshim(tvb, pinfo, tree);
}
void
proto_register_mint(void)
{
#ifndef HAVE_HFI_SECTION_INIT
static header_field_info *hfi[] = {
/* MiNT Eth Shim */
&hfi_mint_ethshim,
&hfi_mint_ethshim_unknown,
&hfi_mint_ethshim_length,
/* MiNT common */
&hfi_mint_header,
&hfi_mint_header_unknown1,
&hfi_mint_header_srcid,
&hfi_mint_header_dstid,
&hfi_mint_header_srcdatatype,
&hfi_mint_header_dstdatatype,
/* MiNT Data */
&hfi_mint_data,
&hfi_mint_data_vlan,
&hfi_mint_data_seqno,
&hfi_mint_data_unknown1,
/* MiNT Control */
&hfi_mint_control,
&hfi_mint_control_32zerobytes,
&hfi_mint_control_unknown1,
/* MiNT Control 0x0c */
&hfi_mint_control_0x0c_message_type,
&hfi_mint_control_0x0c_header_sender,
&hfi_mint_control_0x0c_unknown1,
&hfi_mint_control_0x0c_unknown2,
&hfi_mint_control_0x0c_unknown3,
&hfi_mint_control_0x0c_header_length,
&hfi_mint_control_0x0c_header_unknown,
&hfi_mint_control_0x0c_type_unknown,
&hfi_mint_control_0x0c_type_csnp,
&hfi_mint_control_0x0c_type_helo,
&hfi_mint_control_0x0c_type_lsp,
&hfi_mint_control_0x0c_type_psnp,
&hfi_mint_control_0x0c_length,
&hfi_mint_control_0x0c_array,
&hfi_mint_control_0x0c_element,
&hfi_mint_control_0x0c_value,
/* MiNT Control 0x1e */
&hfi_mint_control_0x1e_unknown,
/* MiNT Control 0x22 */
&hfi_mint_control_0x22_message,
&hfi_mint_control_0x22_type,
&hfi_mint_control_0x22_length,
&hfi_mint_control_0x22_value,
};
#endif
static gint *ett[] = {
&ett_mint_ethshim,
&ett_mint,
&ett_mint_header,
&ett_mint_ctrl,
&ett_mint_data,
};
int proto_mint, proto_mint_data;
proto_mint = proto_register_protocol(PROTO_LONG_NAME, PROTO_SHORT_NAME, "mint");
/* Created to remove Decode As confusion */
proto_mint_data = proto_register_protocol("Media independent Network Transport Data", "MiNT (Data)", "mint_data");
hfi_mint = proto_registrar_get_nth(proto_mint);
proto_register_fields(proto_mint, hfi, array_length(hfi));
proto_register_subtree_array(ett, array_length(ett));
mint_control_handle = create_dissector_handle(dissect_mint_control_static, proto_mint);
mint_data_handle = create_dissector_handle(dissect_mint_data_static, proto_mint_data);
mint_eth_handle = create_dissector_handle(dissect_mint_ethshim_static, proto_mint);
}
void
proto_reg_handoff_mint(void)
{
dissector_add_uint("udp.port", PORT_MINT_CONTROL_TUNNEL, mint_control_handle);
dissector_add_uint("udp.port", PORT_MINT_DATA_TUNNEL, mint_data_handle);
dissector_add_uint("ethertype", ETHERTYPE_MINT, mint_eth_handle);
eth_handle = find_dissector_add_dependency("eth_withoutfcs", hfi_mint->id);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/