forked from osmocom/wireshark
![Dario Lombardo](/assets/img/avatar_default.png)
Change-Id: I92c94448e6641716d03158a5f332c8b53709423a Reviewed-on: https://code.wireshark.org/review/25756 Petri-Dish: Dario Lombardo <lomato@gmail.com> Reviewed-by: Anders Broman <a.broman58@gmail.com>
211 lines
5.7 KiB
C
211 lines
5.7 KiB
C
/* packet-idp.c
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* Routines for XNS IDP
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* Based on the Netware IPX dissector by Gilbert Ramirez <gram@alumni.rice.edu>
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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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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include "packet-idp.h"
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#include <epan/etypes.h>
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void proto_register_idp(void);
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void proto_reg_handoff_idp(void);
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static int proto_idp = -1;
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static int hf_idp_checksum = -1;
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static int hf_idp_len = -1;
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/* static int hf_idp_src = -1; */
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/* static int hf_idp_dst = -1; */
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static int hf_idp_hops = -1;
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static int hf_idp_packet_type = -1;
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static int hf_idp_dnet = -1;
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static int hf_idp_dnode = -1;
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static int hf_idp_dsocket = -1;
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static int hf_idp_snet = -1;
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static int hf_idp_snode = -1;
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static int hf_idp_ssocket = -1;
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static gint ett_idp = -1;
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static dissector_table_t idp_type_dissector_table;
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/*
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* See
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*
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* "Internet Transport Protocols", XSIS 028112, December 1981
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*
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* if you can find it; this is based on the headers in the BSD XNS
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* implementation.
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*/
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#define IDP_HEADER_LEN 30 /* It's *always* 30 bytes */
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static const value_string idp_packet_type_vals[] = {
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{ IDP_PACKET_TYPE_RIP, "RIP" },
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{ IDP_PACKET_TYPE_ECHO, "Echo" },
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{ IDP_PACKET_TYPE_ERROR, "Error" },
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{ IDP_PACKET_TYPE_PEP, "PEP" },
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{ IDP_PACKET_TYPE_SPP, "SPP" },
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{ 0, NULL }
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};
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static const value_string idp_socket_vals[] = {
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{ IDP_SOCKET_SMB, "SMB" },
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{ 0, NULL }
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};
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static int
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dissect_idp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_tree *idp_tree;
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proto_item *ti;
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guint16 length;
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guint8 type;
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tvbuff_t *next_tvb;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "IDP");
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col_clear(pinfo->cinfo, COL_INFO);
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ti = proto_tree_add_item(tree, proto_idp, tvb, 0, IDP_HEADER_LEN, ENC_NA);
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idp_tree = proto_item_add_subtree(ti, ett_idp);
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proto_tree_add_checksum(idp_tree, tvb, 0, hf_idp_checksum, -1, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
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length = tvb_get_ntohs(tvb, 2);
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proto_tree_add_uint(idp_tree, hf_idp_len, tvb, 2, 2, length);
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/* Adjust the tvbuff length to include only the IDP datagram. */
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set_actual_length(tvb, length);
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proto_tree_add_item(idp_tree, hf_idp_hops, tvb, 4, 1, ENC_BIG_ENDIAN);
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type = tvb_get_guint8(tvb, 5);
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proto_tree_add_uint(idp_tree, hf_idp_packet_type, tvb, 5, 1, type);
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pinfo->ptype = PT_IDP;
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/* Destination */
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proto_tree_add_item(idp_tree, hf_idp_dnet, tvb, 6, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(idp_tree, hf_idp_dnode, tvb, 10, 6, ENC_NA);
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pinfo->destport = tvb_get_ntohs(tvb, 16);
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proto_tree_add_uint(idp_tree, hf_idp_dsocket, tvb, 16, 2,
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pinfo->destport);
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/* Source */
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proto_tree_add_item(idp_tree, hf_idp_snet, tvb, 18, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(idp_tree, hf_idp_snode, tvb, 22, 6, ENC_NA);
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pinfo->srcport = tvb_get_ntohs(tvb, 28);
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proto_tree_add_uint(idp_tree, hf_idp_ssocket, tvb, 28, 2,
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pinfo->srcport);
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/* Make the next tvbuff */
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next_tvb = tvb_new_subset_remaining(tvb, IDP_HEADER_LEN);
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/*
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* Hand off to the dissector for the packet type.
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*/
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if (!dissector_try_uint(idp_type_dissector_table, type, next_tvb,
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pinfo, tree))
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{
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call_data_dissector(next_tvb, pinfo, tree);
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}
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return tvb_captured_length(tvb);
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}
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void
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proto_register_idp(void)
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{
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static hf_register_info hf_idp[] = {
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{ &hf_idp_checksum,
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{ "Checksum", "idp.checksum", FT_UINT16, BASE_HEX,
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NULL, 0x0, NULL, HFILL }},
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#if 0
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{ &hf_idp_src,
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{ "Source Address", "idp.src", FT_STRING, BASE_NONE,
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NULL, 0x0, NULL, HFILL }},
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#endif
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#if 0
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{ &hf_idp_dst,
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{ "Destination Address", "idp.dst", FT_STRING, BASE_NONE,
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NULL, 0x0, NULL, HFILL }},
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#endif
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{ &hf_idp_len,
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{ "Length", "idp.len", FT_UINT16, BASE_DEC|BASE_UNIT_STRING,
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&units_byte_bytes, 0x0, NULL, HFILL }},
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/* XXX - does this have separate hop count and time subfields? */
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{ &hf_idp_hops,
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{ "Transport Control (Hops)", "idp.hops", FT_UINT8, BASE_DEC,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_idp_packet_type,
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{ "Packet Type", "idp.packet_type", FT_UINT8, BASE_DEC,
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VALS(idp_packet_type_vals), 0x0, NULL, HFILL }},
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{ &hf_idp_dnet,
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{ "Destination Network","idp.dst.net", FT_UINT32, BASE_HEX,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_idp_dnode,
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{ "Destination Node", "idp.dst.node", FT_ETHER, BASE_NONE,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_idp_dsocket,
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{ "Destination Socket", "idp.dst.socket", FT_UINT16, BASE_HEX,
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VALS(idp_socket_vals), 0x0, NULL, HFILL }},
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{ &hf_idp_snet,
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{ "Source Network","idp.src.net", FT_UINT32, BASE_HEX,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_idp_snode,
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{ "Source Node", "idp.src.node", FT_ETHER, BASE_NONE,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_idp_ssocket,
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{ "Source Socket", "idp.src.socket", FT_UINT16, BASE_HEX,
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VALS(idp_socket_vals), 0x0, NULL, HFILL }},
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};
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static gint *ett[] = {
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&ett_idp,
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};
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proto_idp = proto_register_protocol("Internetwork Datagram Protocol",
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"IDP", "idp");
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proto_register_field_array(proto_idp, hf_idp, array_length(hf_idp));
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proto_register_subtree_array(ett, array_length(ett));
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idp_type_dissector_table = register_dissector_table("idp.packet_type",
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"IDP packet type", proto_idp, FT_UINT8, BASE_DEC);
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}
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void
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proto_reg_handoff_idp(void)
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{
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dissector_handle_t idp_handle;
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idp_handle = create_dissector_handle(dissect_idp, proto_idp);
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dissector_add_uint("ethertype", ETHERTYPE_XNS_IDP, idp_handle);
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dissector_add_uint("chdlc.protocol", ETHERTYPE_XNS_IDP, idp_handle);
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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: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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