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wireshark/epan/dissectors/packet-nsrp.c
Michael Mann ad6fc87d64 Add proto_tree_add_checksum. 
This is an attempt to standardize display/handling of checksum fields for all dissectors.
The main target is for dissectors that do validation, but dissectors that just report the
checksum were also included just to make them easier to find in the future.

Bug: 10620
Bug: 12058
Ping-Bug: 8859
Change-Id: Ia8abd86e42eaf8ed50de6b173409e914b17993bf
Reviewed-on: https://code.wireshark.org/review/16380
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Jeff Morriss <jeff.morriss.ws@gmail.com>
Reviewed-by: Michael Mann <mmann78@netscape.net>
2016-07-21 12:35:22 +00:00

530 lines
16 KiB
C
Raw Blame History

/* packet-nsrp.c
* Routines for the Juniper Netscreen Redundant Protocol (NSRP)
*
* Secfire <secfire@gmail.com>
*
* 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.
*/
/*
*
* NSRP update information can be found at www.juniper.net
*
*
*
* NSRP Packet Header is defined as follow:
*
* 1 2 3 4 5 6 7 8
* +--------+--------+--------+--------+--------+--------+--------+--------+
* |Version | Type |Clust ID|MSG Flag| Length |HA Port |Not Used|
* +--------+--------+--------+--------+--------+--------+--------+--------+
* | Destination Unit | Source Unit |
* +--------+--------+--------+--------+--------+--------+--------+--------+
*
*
*
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/etypes.h>
void proto_register_nsrp(void);
void proto_reg_handoff_nsrp(void);
#define NSRP_MIN_LEN 32
/* Initialize the protocol and registered fields */
static int proto_nsrp = -1;
static int hf_nsrp_version = -1;
static int hf_nsrp_msg_type = -1;
static int hf_nsrp_clust_id = -1;
static int hf_nsrp_msg_flag = -1;
static int hf_nsrp_len = -1;
static int hf_nsrp_ha_port = -1;
static int hf_nsrp_not_used = -1;
static int hf_nsrp_dst_unit = -1;
static int hf_nsrp_src_unit = -1;
static int hf_nsrp_msgtype = -1;
static int hf_nsrp_wst_group = -1;
static int hf_nsrp_hst_group = -1;
static int hf_nsrp_msgflag = -1;
static int hf_nsrp_authflag = -1;
static int hf_nsrp_priority = -1;
static int hf_nsrp_dummy = -1;
static int hf_nsrp_authchecksum = -1;
static int hf_nsrp_ifnum = -1;
/* Dada defined for HA Message */
static int hf_nsrp_msglen = -1;
static int hf_nsrp_encflag = -1;
/* static int hf_nsrp_notused = -1; */
static int hf_nsrp_total_size = -1;
static int hf_nsrp_ns = -1;
static int hf_nsrp_nr = -1;
static int hf_nsrp_no_used = -1;
static int hf_nsrp_checksum = -1;
static int hf_nsrp_data = -1;
static const value_string nsrp_msg_type_vals[] = {
{ 0x01, "HA MESSAGE" },
{ 0x02, "MNG MESSAGE" },
{ 0x03, "DADA MESSAGE" },
{ 0, NULL }
};
static const value_string nsrp_msgtype_vals[] = {
{ 0x01, "CREATE SESSION" },
{ 0x02, "CLOSE SESSION" },
{ 0x03, "CHANG SESSION" },
{ 0x04, "CREATE SP SESSION" },
{ 0x05, "SYS CONFIG" },
{ 0x06, "FILE SYS" },
{ 0x07, "CMD WEB" },
{ 0x08, "SAVE SLAVE" },
{ 0x09, "VPN SPI" },
{ 0x0a, "ARP" },
{ 0x0b, "HEALTH CHECK" },
{ 0x0c, "EMW DATA" },
{ 0x0d, "INVITE SYNC" },
{ 0x0e, "DOWNLOAD CONFIG" },
{ 0x0f, "L2TP TUNL CREATE" },
{ 0x10, "L2TP TUNL DELETE" },
{ 0x11, "L2TP CALL CREATE" },
{ 0x12, "L2TP CALL DELETE" },
{ 0x13, "PKI SYNC" },
{ 0x14, "VPN SEQ" },
{ 0x15, "MAX" },
{ 0, NULL }
};
static const value_string nsrp_flag_vals[] = {
{ 0x80, "ENCRPT MESSAGE" },
{ 0x40, "CLOSE SESSION" },
{ 0x20, "CHANG SESSION" },
{ 0x10, "CREATE SP SESSION" },
{ 0x08, "SYS CONFIG" },
{ 0x04, "FILE SYS" },
{ 0x02, "CMD WEB" },
{ 0, NULL }
};
static const value_string nsrp_encflag_vals[] = {
{ 0xf0, "ENCRYPT METHOD MASK" },
{ 0x0f, "ENCRYPT PAD BIT MASK" },
{ 0, NULL }
};
/* Initialize the subtree pointers */
static gint ett_nsrp = -1;
/* Code to actually dissect the packets */
static int
dissect_nsrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti;
proto_tree *nsrp_tree = NULL;
gint offset = 0;
guint8 msgtype = 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "NSRP");
col_set_str(pinfo->cinfo, COL_INFO, "NSRP Protocol");
if (tree) {
ti = proto_tree_add_item(tree, proto_nsrp, tvb, 0, -1, ENC_NA);
nsrp_tree = proto_item_add_subtree(ti, ett_nsrp);
proto_tree_add_item(nsrp_tree, hf_nsrp_version, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
msgtype = tvb_get_guint8(tvb, offset);
proto_tree_add_item(nsrp_tree, hf_nsrp_msg_type, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_clust_id, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_msg_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_len, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(nsrp_tree, hf_nsrp_ha_port, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_not_used, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_dst_unit, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(nsrp_tree, hf_nsrp_src_unit, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
}
/*
*
*
* NSRP HA Packet is defined as follow:
*
* 1 2 3 4 5 6 7 8
* +--------+--------+--------+--------+--------+--------+--------+--------+
* | Type |WstGroup|HstGroup|MSG Flag| Length |Enc Flag|Not Used|
* +--------+--------+--------+--------+--------+--------+--------+--------+
* | Total Size | NS | NR |
* +--------+--------+--------+--------+--------+--------+--------+--------+
* | No Used | Checksum | Data |
* +--------+--------+--------+--------+-----------------------------------+
*
*
*/
if ( msgtype == 0x00 ) {
proto_tree_add_item(nsrp_tree, hf_nsrp_msgtype, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_wst_group, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_hst_group, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_msgflag, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_msglen, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(nsrp_tree, hf_nsrp_encflag, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_not_used, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_total_size, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(nsrp_tree, hf_nsrp_ns, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(nsrp_tree, hf_nsrp_nr, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(nsrp_tree, hf_nsrp_no_used, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_checksum(nsrp_tree, tvb, offset, hf_nsrp_checksum, -1, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
offset += 2;
proto_tree_add_item(nsrp_tree, hf_nsrp_data, tvb, offset, -1, ENC_ASCII|ENC_NA);
}
/*
*
* NSRP MNG Packet is defined as follow:
*
* 1 2 3 4 5 6 7 8
* +--------+--------+--------+--------+--------+--------+--------+--------+
* | Type |WstGroup|HstGroup|MSG Flag| Length |AuthFlag|Not Used|
* +--------+--------+--------+--------+--------+--------+--------+--------+
* |Priority+ Dummy + Auth CheckSum + Data |
* +--------+--------+--------+--------+-----------------------------------+
*
*
*/
if ( msgtype == 0x02 ) {
proto_tree_add_item(nsrp_tree, hf_nsrp_msgtype, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_wst_group, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_hst_group, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_msgflag, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_msglen, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(nsrp_tree, hf_nsrp_authflag, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_not_used, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_dummy, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_checksum(nsrp_tree, tvb, offset, hf_nsrp_authchecksum, -1, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
offset += 2;
proto_tree_add_item(nsrp_tree, hf_nsrp_data, tvb, offset, -1, ENC_ASCII|ENC_NA);
}
/*
* NSRP DATA Packet is defined as follow:
*
* 1 2 3 4 5 6 7 8
* +--------+--------+--------+--------+--------+--------+--------+--------+
* | Type |WstGroup|HstGroup|MSG Flag| Length | Ifnum |Not Used|
* +--------+--------+--------+--------+--------+--------+--------+--------+
* | Total Size | Data |
* +--------+--------+--------+--------+-----------------------------------+
*
*
*/
if ( msgtype == 0x03 ) {
proto_tree_add_item(nsrp_tree, hf_nsrp_msgtype, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_wst_group, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_hst_group, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_msgflag, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_msglen, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(nsrp_tree, hf_nsrp_ifnum, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_not_used, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(nsrp_tree, hf_nsrp_total_size, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(nsrp_tree, hf_nsrp_data, tvb, offset, -1, ENC_ASCII|ENC_NA);
}
return tvb_captured_length(tvb);
}
void
proto_register_nsrp(void)
{
static hf_register_info hf[] = {
{ &hf_nsrp_version,
{ "Version", "nsrp.version",
FT_UINT8, BASE_DEC, NULL, 0,
"NSRP Version", HFILL }
},
{ &hf_nsrp_msg_type,
{ "Type", "nsrp.type",
FT_UINT8, BASE_DEC, VALS(nsrp_msg_type_vals), 0,
"NSRP Message Type", HFILL }
},
{ &hf_nsrp_clust_id,
{ "Clust ID", "nsrp.clustid",
FT_UINT8, BASE_DEC, NULL, 0,
"NSRP CLUST ID", HFILL }
},
{ &hf_nsrp_msg_flag,
{ "Flag", "nsrp.flag",
FT_UINT8, BASE_DEC, NULL, 0,
"NSRP FLAG", HFILL }
},
{ &hf_nsrp_len,
{ "Length", "nsrp.length",
FT_UINT16, BASE_DEC, NULL, 0,
"NSRP Length", HFILL }
},
{ &hf_nsrp_ha_port,
{ "Port", "nsrp.haport",
FT_UINT8, BASE_DEC, NULL, 0,
"NSRP HA Port", HFILL }
},
{ &hf_nsrp_not_used,
{ "Not used", "nsrp.notused",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_nsrp_dst_unit,
{ "Destination", "nsrp.dst",
FT_UINT32, BASE_DEC, NULL, 0,
"DESTINATION UNIT INFORMATION", HFILL }
},
{ &hf_nsrp_src_unit,
{ "Source", "nsrp.src",
FT_UINT32, BASE_DEC, NULL, 0,
"SOURCE UNIT INFORMATION", HFILL }
},
{ &hf_nsrp_msgtype,
{ "MsgType", "nsrp.msgtype",
FT_UINT8, BASE_DEC, VALS(nsrp_msgtype_vals), 0,
"Message Type", HFILL }
},
{ &hf_nsrp_wst_group,
{ "Wst group", "nsrp.wst",
FT_UINT8, BASE_DEC, NULL, 0,
"NSRP WST GROUP", HFILL }
},
{ &hf_nsrp_hst_group,
{ "Hst group", "nsrp.hst",
FT_UINT8, BASE_DEC, NULL, 0,
"NSRP HST GROUP", HFILL }
},
{ &hf_nsrp_msgflag,
{ "Msgflag", "nsrp.msgflag",
FT_UINT8, BASE_DEC, VALS(nsrp_flag_vals), 0,
"NSRP MSG FLAG", HFILL }
},
{ &hf_nsrp_msglen,
{ "Msg Length", "nsrp.msglen",
FT_UINT16, BASE_DEC, NULL, 0,
"NSRP MESSAGE LENGTH", HFILL }
},
{ &hf_nsrp_encflag,
{ "Enc Flag", "nsrp.encflag",
FT_UINT8, BASE_DEC, VALS(nsrp_encflag_vals), 0,
"NSRP ENCRYPT FLAG", HFILL }
},
#if 0
{ &hf_nsrp_notused,
{ "Not Used", "nsrp.notused",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL }
},
#endif
{ &hf_nsrp_total_size,
{ "Total Size", "nsrp.totalsize",
FT_UINT32, BASE_DEC, NULL, 0,
"NSRP MSG TOTAL MESSAGE", HFILL }
},
{ &hf_nsrp_ns,
{ "Ns", "nsrp.ns",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_nsrp_nr,
{ "Nr", "nsrp.nr",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_nsrp_no_used,
{ "Reserved", "nsrp.reserved",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_nsrp_checksum,
{ "Checksum", "nsrp.checksum",
FT_UINT16, BASE_HEX, NULL, 0,
"NSRP PACKET CHECKSUM", HFILL }
},
{ &hf_nsrp_authflag,
{ "AuthFlag", "nsrp.authflag",
FT_UINT8, BASE_HEX, NULL, 0,
"NSRP Auth Flag", HFILL }
},
{ &hf_nsrp_priority,
{ "Priority", "nsrp.priority",
FT_UINT8, BASE_HEX, NULL, 0,
"NSRP Priority", HFILL }
},
{ &hf_nsrp_dummy,
{ "Dummy", "nsrp.dummy",
FT_UINT8, BASE_HEX, NULL, 0,
"NSRP Dummy", HFILL }
},
{ &hf_nsrp_authchecksum,
{ "Checksum", "nsrp.authchecksum",
FT_UINT16, BASE_HEX, NULL, 0,
"NSRP AUTH CHECKSUM", HFILL }
},
{ &hf_nsrp_ifnum,
{ "Ifnum", "nsrp.ifnum",
FT_UINT16, BASE_HEX, NULL, 0,
"NSRP IfNum", HFILL }
},
{ &hf_nsrp_data,
{ "Data", "nsrp.data",
FT_STRING, BASE_NONE, NULL, 0,
"PADDING", HFILL }
}
};
static gint *ett[] = {
&ett_nsrp
};
proto_nsrp = proto_register_protocol("Juniper Netscreen Redundant Protocol",
"NSRP", "nsrp");
proto_register_field_array(proto_nsrp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_nsrp(void)
{
dissector_handle_t nsrp_handle;
nsrp_handle = create_dissector_handle(dissect_nsrp, proto_nsrp);
dissector_add_uint("ethertype", ETHERTYPE_NSRP, nsrp_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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