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wireshark/epan/dissectors/packet-3com-njack.c

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/* packet-3com-njack.c
* Routines for the disassembly of the 3com NetworkJack management protocol
*
* Copyright 2005 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.
*/
/*
TODO:
- Find out lots more values :-)
- Support for other 3com devices that use the same protocol
- Do any devices use TCP or different ports?
- Sanity checks for tlv_length depending on tlv_type
- Search and fix XXX comments in the code
- Proper descriptions in hf_ fields
Specs:
No specs available. All knowledge gained by looking at traffic dumps
Packets to Managementstation: PORT_NJACK_PC (5264)
Packets to Switch: PORT_NJACK_SWITCH (5265)
Type 0x00? (localquery): M -> BC, Magic, type, 'LOCALQUERY'?
Type 0x01 (query): M -> S, Magic, type, 'QUERY'
Type 0x02 (query resp): S -> M, Magic, type, tlv-list (end: ffxx)
Type 0x04 ??? (after query resp): M -> S, Magic, type, 0x43AAD406
Type 0x07 (set): M -> S, Magic, type, length (16 bit be)
Type 0x08 (set resp): S -> M, Magic, type, net length (8 bit), result status
Type 0x0b (get): M -> S, Magic, type, 00 00 63 ff
Type 0x0c (get resp): S -> M, Magic, type, T(8 bit) L(8 bit) V(L bytes)
Type 0x0d (dhcpinfo): S -> M, Magic, type, tlv, t=00 = last (no length)
Type 0x10 (clear counters): M -> S, Magic, type, 0400
Type 0x10 (clear counters resp): M -> S, Magic, type, 00
*/
#include "config.h"
#include <epan/packet.h>
/* Forward declarations */
void proto_register_njack(void);
void proto_reg_handoff_njack(void);
/* protocol handles */
static int proto_njack = -1;
/* ett handles */
static int ett_njack = -1;
static int ett_njack_tlv_header = -1;
/* hf elements */
static int hf_njack_magic = -1;
static int hf_njack_type = -1;
/* type set/get response */
static int hf_njack_tlv_length = -1;
static int hf_njack_tlv_data = -1;
static int hf_njack_tlv_version = -1;
static int hf_njack_tlv_type = -1;
static int hf_njack_tlv_typeip = -1;
static int hf_njack_tlv_devicemac = -1;
static int hf_njack_tlv_snmpwrite = -1;
static int hf_njack_tlv_dhcpcontrol = -1;
static int hf_njack_tlv_typestring = -1;
/* 1st TAB */
static int hf_njack_tlv_countermode = -1;
static int hf_njack_tlv_scheduling = -1;
static int hf_njack_tlv_addtagscheme = -1;
static int hf_njack_tlv_portingressmode = -1;
static int hf_njack_tlv_maxframesize = -1;
static int hf_njack_tlv_powerforwarding = -1;
/* type 07: set */
static int hf_njack_set_length = -1;
static int hf_njack_set_salt = -1;
static int hf_njack_set_authdata = -1;
/* type 08: set result */
static int hf_njack_setresult = -1;
/* type 0b: get */
/* type 0c: get response */
static int hf_njack_getresp_unknown1 = -1;
#define PROTO_SHORT_NAME "NJACK"
#define PROTO_LONG_NAME "3com Network Jack"
#define PORT_NJACK_PC 5264
#define PORT_NJACK_SWITCH 5265
typedef enum {
NJACK_TYPE_QUERY = 0x01,
NJACK_TYPE_QUERYRESP = 0x02,
/* type 0x04 exists - see specs sections */
NJACK_TYPE_SET = 0x07,
NJACK_TYPE_SETRESULT = 0x08,
NJACK_TYPE_GET = 0x0b,
NJACK_TYPE_GETRESP = 0x0c,
NJACK_TYPE_DHCPINFO = 0x0d,
NJACK_TYPE_CLEARCOUNTER = 0x10,
NJACK_TYPE_COUNTERRESP = 0x11
} njack_type_t;
static const value_string njack_type_vals[] = {
{ NJACK_TYPE_SET, "Set"},
{ NJACK_TYPE_SETRESULT, "Set result"},
{ NJACK_TYPE_QUERY, "Query (discovery)"},
{ NJACK_TYPE_QUERYRESP, "Query response"},
{ NJACK_TYPE_GET, "Get"},
{ NJACK_TYPE_GETRESP, "Get response"},
{ NJACK_TYPE_DHCPINFO, "DHCP info\?\?"},
{ NJACK_TYPE_CLEARCOUNTER, "Clear counters\?\?"},
{ NJACK_TYPE_COUNTERRESP, "Clear counters response\?\?"},
{ 0, NULL }
};
typedef enum {
NJACK_CMD_STARTOFPARAMS = 0x00,
NJACK_CMD_MACADDRESS = 0x01,
NJACK_CMD_IPADDRESS = 0x02,
NJACK_CMD_NETWORK = 0x03,
NJACK_CMD_MASK = 0x04,
NJACK_CMD_MAXFRAMESIZE = 0x05,
NJACK_CMD_COUNTERMODE = 0x06,
NJACK_CMD_QUEUEING = 0x0a,
NJACK_CMD_ADDTAGSCHEME = 0x0b,
NJACK_CMD_REMOVETAG = 0x0c,
NJACK_CMD_GROUP = 0x0d,
NJACK_CMD_LOCATION = 0x0e,
NJACK_CMD_VERSION = 0x0f,
NJACK_CMD_PORT1 = 0x13,
NJACK_CMD_PORT2 = 0x14,
NJACK_CMD_PORT3 = 0x15,
NJACK_CMD_PORT4 = 0x16,
NJACK_CMD_PASSWORD = 0x19,
NJACK_CMD_ENABLESNMPWRITE = 0x1a,
NJACK_CMD_ROCOMMUNITY = 0x1b,
NJACK_CMD_RWCOMMUNITY = 0x1c,
NJACK_CMD_POWERFORWARDING = 0x1e,
NJACK_CMD_DHCPCONTROL = 0x1f,
NJACK_CMD_IPGATEWAY = 0x20,
NJACK_CMD_SNMPTRAP = 0x23,
NJACK_CMD_COLDSTARTTRAP = 0x26,
NJACK_CMD_LINKDOWNTRAP = 0x27,
NJACK_CMD_LINKUPTRAP = 0x28,
NJACK_CMD_AUTHFAILTRAP = 0x29,
NJACK_CMD_PRODUCTNAME = 0x2a,
NJACK_CMD_SERIALNO = 0x2b,
NJACK_CMD_GETALLPARMAMS = 0x63,
NJACK_CMD_ENDOFPACKET = 0xff
} njack_cmd_type_t;
static const value_string njack_cmd_vals[] = {
{ NJACK_CMD_STARTOFPARAMS, "Start of Parameters" },
{ NJACK_CMD_MACADDRESS, "MAC address" },
{ NJACK_CMD_IPADDRESS, "IP address" },
{ NJACK_CMD_NETWORK, "IP network" },
{ NJACK_CMD_MASK, "IP netmask" },
{ NJACK_CMD_MAXFRAMESIZE, "Max frame size" },
{ NJACK_CMD_COUNTERMODE, "Countermode" },
{ NJACK_CMD_QUEUEING, "Priority scheduling policy" },
{ NJACK_CMD_ADDTAGSCHEME, "Add tag scheme" },
{ NJACK_CMD_REMOVETAG, "Remove tag" },
{ NJACK_CMD_GROUP, "Device group" },
{ NJACK_CMD_LOCATION, "Location" },
{ NJACK_CMD_VERSION, "Firmware version" },
{ NJACK_CMD_PORT1, "Port 1" },
{ NJACK_CMD_PORT2, "Port 2" },
{ NJACK_CMD_PORT3, "Port 3" },
{ NJACK_CMD_PORT4, "Port 4" },
{ NJACK_CMD_PASSWORD, "Device password" },
{ NJACK_CMD_ENABLESNMPWRITE, "SNMP write enable" },
{ NJACK_CMD_ROCOMMUNITY, "RO community" },
{ NJACK_CMD_RWCOMMUNITY, "RW community" },
{ NJACK_CMD_POWERFORWARDING, "Port power forwarding" },
{ NJACK_CMD_DHCPCONTROL, "DHCP control" },
{ NJACK_CMD_IPGATEWAY, "IP gateway" },
{ NJACK_CMD_SNMPTRAP, "SNMP trap" },
{ NJACK_CMD_COLDSTARTTRAP, "Coldstart trap" },
{ NJACK_CMD_LINKDOWNTRAP, "Linkdown trap" },
{ NJACK_CMD_LINKUPTRAP, "Linkup trap" },
{ NJACK_CMD_AUTHFAILTRAP, "Auth fail trap" },
{ NJACK_CMD_PRODUCTNAME, "Product name" },
{ NJACK_CMD_SERIALNO, "Serial no" },
{ NJACK_CMD_GETALLPARMAMS, "Get all parameters" },
{ NJACK_CMD_ENDOFPACKET, "End of packet" },
{ 0, NULL }
};
static value_string_ext njack_cmd_vals_ext = VALUE_STRING_EXT_INIT(njack_cmd_vals);
typedef enum {
NJACK_SETRESULT_SUCCESS = 0x01,
NJACK_SETRESULT_FAILAUTH = 0xFD
} njack_setresult_t;
static const value_string njack_setresult_vals[] = {
{ NJACK_SETRESULT_SUCCESS, "Success" },
{ NJACK_SETRESULT_FAILAUTH, "Failauth" },
{ 0, NULL }
};
/* General settings TAB */
static const value_string njack_dhcpcontrol[] = {
{ 0, "Disable" },
{ 1, "Enable" },
{ 0, NULL }
};
/* End General settings TAB */
/* Port settings TAB */
#if 0
static const true_false_string tfs_port_state = {
"Disable",
"Enable"
};
static const true_false_string tfs_port_autoneg = {
"Manual",
"Auto negotiation"
};
static const true_false_string tfs_port_speed = {
"10Mbps",
"100Mbps"
};
static const true_false_string tfs_port_duplex = {
"halfduplex",
"duplex"
};
#endif
/* End Port settings TAB */
/* Hardware Settings TAB */
static const value_string njack_scheduling[] = {
{ 0, "Weighted fair" },
{ 1, "Strict priority" },
{ 0, NULL }
};
static const value_string njack_addtagscheme[] = {
{ 0, "Frames transmitted unmodified" },
{ 1, "Add tag to untagged frame" },
{ 0, NULL }
};
static const value_string njack_portingressmode[] = {
{ 0, "Receive unmodified" },
{ 1, "Remove tag if present" },
{ 0, NULL }
};
static const value_string njack_maxframesize[] = {
{ 0, "1522 tagged, 1518 untagged" },
{ 1, "1535" },
{ 0, NULL }
};
static const value_string njack_countermode[] = {
{ 0, "Count Rx, Tx Good frames" },
{ 1, "RX errors, TX collisions" },
{ 0, NULL }
};
static const value_string njack_powerforwarding[] = {
{ 1, "OFF" },
{ 2, "ON" },
/* XXX find out correct value */
{ 3, "802.3af" },
{ 0, NULL }
};
/* End Hardware Settings TAB */
/* SNMP TAB */
static const value_string njack_snmpwrite[] = {
{ 0, "Disable" },
{ 1, "Enable" },
{ 0, NULL }
};
#if 0
static const value_string njack_snmptrap[] = {
{ 0, "Disable" },
{ 1, "Enable" },
{ 0, NULL }
};
static const value_string njack_coldstarttrap[] = {
{ 0, "Disable" },
{ 1, "Enable" },
{ 0, NULL }
};
static const value_string njack_linkdowntrap[] = {
{ 0, "Disable" },
{ 1, "Enable" },
{ 0, NULL }
};
static const value_string njack_linkuptrap[] = {
{ 0, "Disable" },
{ 1, "Enable" },
{ 0, NULL }
};
static const value_string njack_authfailtrap[] = {
{ 0, "Disable" },
{ 1, "Enable" },
{ 0, NULL }
};
#endif
/* End SNMP TAB */
static int
dissect_portsettings(tvbuff_t *tvb, proto_tree *port_tree, guint32 offset)
{
/* XXX This is still work in progress, the information here
* may be wrong and is obviously incomplete
* Structure: 8 bytes, total 64 bits.
*
* Bytes 0-1: select feature
* 2-7: feature values
* Feature Indicator Valuebit(s)
* ------------------------------------------------------------
* Port Vlan 0x8000 0x0000 0078 0000 (bits: port 4 ... 1)
* Prio (hw queue) 0x4000 0x0000 0006 0000
* MC rate limit 0x1000 0x0000 6000 0000 (0:3, 1:6, 2:12, 3:100%)
* Speed/Duplex 0x0c00 XXX don't know which bit is speed / duplex
* 0x0000 0800 0000 (duplex 0 half, 1 full)
* 0x0000 1000 0000 (speed 0 10M, 1 100M)
* Port Ena 0x0100 0x0000 0300 0000 (1 dis, 3 ena)
* Auto neg 0x0008 0x0000 0000 0800 (0 man, 1 auto)
* Vlan number 0x0004 0xff0f 0000 0000 (le)
* XXX evaluate the following stuff:
* Flowcontrol 0x0001 0x0000 0000 0200 ???
* Flowcontrol 0x0001 0x0100 83f1 0a00 <- recorded
* Auto Mdi 0x0002 0x0000 0000 0300 (1 man, 2 auto)
* Manual MDI 0x0002 0x0100 8371 0900 <- recorded
* Manual MDI-X 0x0002 0x0100 8371 0800 <- recorded
* Auto MDI-X
*/
proto_tree_add_item(port_tree, hf_njack_tlv_data,
tvb, offset, 8, ENC_NA);
return offset;
}
static int
dissect_tlvs(tvbuff_t *tvb, proto_tree *njack_tree, guint32 offset)
{
guint8 tlv_type;
guint8 tlv_length;
proto_item *tlv_tree;
for (;;) {
tlv_type = tvb_get_guint8(tvb, offset);
/* Special cases that don't have a length field */
if (tlv_type == NJACK_CMD_ENDOFPACKET) {
proto_tree_add_item(njack_tree, hf_njack_tlv_type,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
}
if (tlv_type == NJACK_CMD_GETALLPARMAMS) {
proto_tree_add_item(njack_tree, hf_njack_tlv_type,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
continue;
}
tlv_length = tvb_get_guint8(tvb, offset + 1);
tlv_tree = proto_tree_add_subtree_format(njack_tree, tvb,
offset, tlv_length + 2, ett_njack_tlv_header, NULL,
"T %02x, L %02x: %s",
tlv_type,
tlv_length,
val_to_str_ext_const(tlv_type, &njack_cmd_vals_ext, "Unknown"));
proto_tree_add_item(tlv_tree, hf_njack_tlv_type,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(tlv_tree, hf_njack_tlv_length,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
switch (tlv_type) {
case NJACK_CMD_STARTOFPARAMS:
break;
case NJACK_CMD_COUNTERMODE:
proto_tree_add_item(tlv_tree, hf_njack_tlv_countermode,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
case NJACK_CMD_QUEUEING:
proto_tree_add_item(tlv_tree, hf_njack_tlv_scheduling,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
case NJACK_CMD_ADDTAGSCHEME:
proto_tree_add_item(tlv_tree, hf_njack_tlv_addtagscheme,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
case NJACK_CMD_REMOVETAG:
proto_tree_add_item(tlv_tree, hf_njack_tlv_portingressmode,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
case NJACK_CMD_MAXFRAMESIZE:
proto_tree_add_item(tlv_tree, hf_njack_tlv_maxframesize,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
case NJACK_CMD_ENABLESNMPWRITE:
proto_tree_add_item(tlv_tree, hf_njack_tlv_snmpwrite,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
case NJACK_CMD_POWERFORWARDING:
proto_tree_add_item(tlv_tree, hf_njack_tlv_powerforwarding,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
case NJACK_CMD_DHCPCONTROL:
proto_tree_add_item(tlv_tree, hf_njack_tlv_dhcpcontrol,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
break;
case NJACK_CMD_MACADDRESS:
proto_tree_add_item(tlv_tree, hf_njack_tlv_devicemac,
tvb, offset, 6, ENC_NA);
offset += 6;
break;
case NJACK_CMD_VERSION:
/* XXX Don't misuse ip address printing here */
proto_tree_add_item(tlv_tree, hf_njack_tlv_version,
tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
break;
case NJACK_CMD_IPADDRESS:
case NJACK_CMD_NETWORK:
case NJACK_CMD_MASK:
case NJACK_CMD_IPGATEWAY:
proto_tree_add_item(tlv_tree, hf_njack_tlv_typeip,
tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
break;
case NJACK_CMD_GROUP:
case NJACK_CMD_LOCATION:
case NJACK_CMD_PASSWORD:
case NJACK_CMD_ROCOMMUNITY:
case NJACK_CMD_RWCOMMUNITY:
case 0x25: /* ? */
case NJACK_CMD_PRODUCTNAME:
case NJACK_CMD_SERIALNO:
proto_tree_add_item(tlv_tree, hf_njack_tlv_typestring,
tvb, offset, tlv_length, ENC_ASCII|ENC_NA);
offset += tlv_length;
break;
case NJACK_CMD_PORT1:
case NJACK_CMD_PORT2:
case NJACK_CMD_PORT3:
case NJACK_CMD_PORT4:
if (tlv_length == 8) {
dissect_portsettings(tvb, tlv_tree, offset);
}
offset += tlv_length;
break;
default:
if (tlv_length != 0) {
proto_tree_add_item(tlv_tree, hf_njack_tlv_data,
tvb, offset, tlv_length, ENC_NA);
offset += tlv_length;
}
break;
}
}
return offset;
}
#if 0
#include <wsutil/md5.h>
static gboolean
verify_password(tvbuff_t *tvb, const char *password)
{
/* 1. pad non-terminated password-string to a length of 32 bytes
* (padding: 0x01, 0x02, 0x03...)
* 2. Calculate MD5 of padded password and write it to offset 12 of packet
* 3. Calculate MD5 of resulting packet and write it to offset 12 of packet
*/
gboolean is_valid = TRUE;
const guint8 *packetdata;
guint32 length;
guint8 *workbuffer;
guint i;
guint8 byte;
md5_state_t md_ctx;
md5_byte_t *digest;
workbuffer=wmem_alloc(wmem_packet_scope(), 32);
digest=wmem_alloc(wmem_packet_scope(), 16);
length = tvb_get_ntohs(tvb, 6);
packetdata = tvb_get_ptr(tvb, 0, length);
for (i = 0; i<32 && *password; i++, password++) {
workbuffer[i] = *password;
}
for (byte = 1; i<32; i++, byte++) {
workbuffer[i] = byte;
}
md5_init(&md_ctx);
md5_append(&md_ctx, workbuffer, 32);
md5_finish(&md_ctx, digest);
md5_init(&md_ctx);
md5_append(&md_ctx, packetdata, 12);
md5_append(&md_ctx, digest, 16);
md5_append(&md_ctx, packetdata + 28, length - 28);
md5_finish(&md_ctx, digest);
fprintf(stderr, "Calculated digest: "); /* debugging */
for (i = 0; i < 16; i++) {
fprintf(stderr, "%02X", digest[i]); /* debugging */
if (digest[i] != *(packetdata + 12 + i)) {
is_valid = FALSE;
break;
}
}
fprintf(stderr, " (%d)\n", is_valid); /* debugging */
return is_valid;
}
#endif
static int
dissect_njack(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
proto_item *ti;
proto_tree *njack_tree;
guint32 offset = 0;
guint8 packet_type;
guint8 setresult;
gint remaining;
packet_type = tvb_get_guint8(tvb, 5);
col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
col_add_str(pinfo->cinfo, COL_INFO, val_to_str(packet_type, njack_type_vals, "Type 0x%02x"));
ti = proto_tree_add_item(tree, proto_njack, tvb, offset, -1,
ENC_NA);
njack_tree = proto_item_add_subtree(ti, ett_njack);
proto_tree_add_item(njack_tree, hf_njack_magic, tvb, offset, 5,
ENC_ASCII|ENC_NA);
offset += 5;
proto_tree_add_item(njack_tree, hf_njack_type, tvb, offset, 1,
ENC_BIG_ENDIAN);
offset += 1;
switch (packet_type) {
case NJACK_TYPE_SET:
/* Type 0x07: S -> M, Magic, type, length (16 bit be) */
proto_tree_add_item(njack_tree, hf_njack_set_length, tvb, offset,
2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(njack_tree, hf_njack_set_salt, tvb, offset,
4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(njack_tree, hf_njack_set_authdata, tvb, offset,
16, ENC_NA);
offset += 16;
offset = dissect_tlvs(tvb, njack_tree, offset);
break;
case NJACK_TYPE_SETRESULT:
/* Type 0x08: M -> S, Magic, type, setresult (8 bit) */
setresult = tvb_get_guint8(tvb, offset);
proto_tree_add_item(njack_tree, hf_njack_setresult, tvb, offset,
1, ENC_BIG_ENDIAN);
offset += 1;
col_append_fstr(pinfo->cinfo, COL_INFO, ": %s",
val_to_str(setresult, njack_setresult_vals, "[0x%02x]"));
break;
case NJACK_TYPE_GET:
/* Type 0x0b: S -> M, Magic, type, 00 00 63 ff */
offset = dissect_tlvs(tvb, njack_tree, offset);
break;
case NJACK_TYPE_QUERYRESP:
/* Type 0x02: M -> S, Magic, type, T(8 bit) L(8 bit) V(L bytes) */
case NJACK_TYPE_GETRESP:
/* Type 0x0c: M -> S, Magic, type, T(8 bit) L(8 bit) V(L bytes) */
offset = dissect_tlvs(tvb, njack_tree, offset);
proto_tree_add_item(njack_tree, hf_njack_getresp_unknown1, tvb, offset,
1, ENC_BIG_ENDIAN);
offset += 1;
break;
case NJACK_TYPE_DHCPINFO: /* not completely understood */
default:
/* Unknown type */
remaining = tvb_reported_length_remaining(tvb, offset);
if (remaining > 0) {
proto_tree_add_item(njack_tree, hf_njack_tlv_data,
tvb, offset, remaining, ENC_NA);
offset += remaining;
}
break;
}
return offset;
}
static gboolean
test_njack(tvbuff_t *tvb)
{
/* We need at least 'NJ200' + 1 Byte packet type */
if ( (tvb_captured_length(tvb) < 6) ||
(tvb_strncaseeql(tvb, 0, "NJ200", 5) != 0) ) {
return FALSE;
}
return TRUE;
}
static gboolean
dissect_njack_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
if ( !test_njack(tvb) ) {
return FALSE;
}
dissect_njack(tvb, pinfo, tree, NULL);
return TRUE;
}
static int
dissect_njack_static(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
if ( !test_njack(tvb) ) {
return 0;
}
return dissect_njack(tvb, pinfo, tree, NULL);
}
void
proto_register_njack(void)
{
static hf_register_info hf[] = {
/* NJACK header */
{ &hf_njack_magic,
{ "Magic", "njack.magic", FT_STRING, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_njack_type,
{ "Type", "njack.type", FT_UINT8, BASE_HEX, NULL,
0x0, NULL, HFILL }},
/* TLV fields */
{ &hf_njack_tlv_type,
{ "TlvType", "njack.tlv.type", FT_UINT8, BASE_HEX | BASE_EXT_STRING, &njack_cmd_vals_ext,
0x0, NULL, HFILL }},
{ &hf_njack_tlv_length,
{ "TlvLength", "njack.tlv.length", FT_UINT8, BASE_HEX, NULL,
0x0, NULL, HFILL }},
{ &hf_njack_tlv_data,
{ "TlvData", "njack.tlv.data", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_njack_tlv_version,
{ "TlvFwVersion", "njack.tlv.version", FT_IPv4, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_njack_tlv_snmpwrite,
{ "TlvTypeSnmpwrite", "njack.tlv.snmpwrite", FT_UINT8, BASE_DEC, VALS(njack_snmpwrite),
0x0, NULL, HFILL }},
{ &hf_njack_tlv_dhcpcontrol,
{ "TlvTypeDhcpControl", "njack.tlv.dhcpcontrol", FT_UINT8, BASE_DEC, VALS(njack_dhcpcontrol),
0x0, NULL, HFILL }},
{ &hf_njack_tlv_devicemac,
{ "TlvTypeDeviceMAC", "njack.tlv.devicemac", FT_ETHER, BASE_NONE, NULL,
0x0, NULL, HFILL }},
/* XXX dummy entries, to be replaced */
{ &hf_njack_tlv_typeip,
{ "TlvTypeIP", "njack.tlv.typeip", FT_IPv4, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_njack_tlv_typestring,
{ "TlvTypeString", "njack.tlv.typestring", FT_STRING, BASE_NONE, NULL,
0x0, NULL, HFILL }},
/* 1st tab */
{ &hf_njack_tlv_scheduling,
{ "TlvTypeScheduling", "njack.tlv.scheduling", FT_UINT8, BASE_DEC, VALS(njack_scheduling),
0x0, NULL, HFILL }},
{ &hf_njack_tlv_addtagscheme,
{ "TlvAddTagScheme", "njack.tlv.addtagscheme", FT_UINT8, BASE_DEC, VALS(njack_addtagscheme),
0x0, NULL, HFILL }},
{ &hf_njack_tlv_portingressmode,
{ "TlvTypePortingressmode", "njack.tlv.portingressmode", FT_UINT8, BASE_DEC, VALS(njack_portingressmode),
0x0, NULL, HFILL }},
{ &hf_njack_tlv_maxframesize,
{ "TlvTypeMaxframesize", "njack.tlv.maxframesize", FT_UINT8, BASE_DEC, VALS(njack_maxframesize),
0x0, NULL, HFILL }},
{ &hf_njack_tlv_countermode,
{ "TlvTypeCountermode", "njack.tlv.countermode", FT_UINT8, BASE_DEC, VALS(njack_countermode),
0x0, NULL, HFILL }},
{ &hf_njack_tlv_powerforwarding,
{ "TlvTypePowerforwarding", "njack.tlv.powerforwarding", FT_UINT8, BASE_DEC, VALS(njack_powerforwarding),
0x0, NULL, HFILL }},
/* Type 0x07: set */
{ &hf_njack_set_length,
{ "SetLength", "njack.set.length", FT_UINT16, BASE_HEX, NULL,
0x0, NULL, HFILL }},
{ &hf_njack_set_salt,
{ "Salt", "njack.set.salt", FT_UINT32, BASE_HEX, NULL,
0x0, NULL, HFILL }},
{ &hf_njack_set_authdata,
{ "Authdata", "njack.tlv.authdata", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL }},
/* Type 0x08: set result */
{ &hf_njack_setresult,
{ "SetResult", "njack.setresult", FT_UINT8, BASE_HEX, VALS(njack_setresult_vals),
0x0, NULL, HFILL }},
/* Type 0x0b get */
/* Type 0x0c get response */
{ &hf_njack_getresp_unknown1,
{ "Unknown1", "njack.getresp.unknown1", FT_UINT8, BASE_HEX, NULL,
0x0, NULL, HFILL }},
};
static gint *ett[] = {
&ett_njack,
&ett_njack_tlv_header,
};
proto_njack = proto_register_protocol(PROTO_LONG_NAME, PROTO_SHORT_NAME, "njack");
proto_register_field_array(proto_njack, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_njack(void)
{
dissector_handle_t njack_handle;
njack_handle = create_dissector_handle(dissect_njack_static, proto_njack);
dissector_add_uint("udp.port", PORT_NJACK_PC, njack_handle);
/* dissector_add_uint("tcp.port", PORT_NJACK_PC, njack_handle); */
dissector_add_uint("udp.port", PORT_NJACK_SWITCH, njack_handle);
/* dissector_add_uint("tcp.port", PORT_NJACK_SWITCH, njack_handle); */
heur_dissector_add("udp", dissect_njack_heur, "NJACK over UDP", "njack_udp", proto_njack, HEURISTIC_ENABLE);
heur_dissector_add("tcp", dissect_njack_heur, "NJACK over TCP", "njack_tcp", proto_njack, HEURISTIC_DISABLE);
}
/*
* 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:
*/
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