forked from osmocom/wireshark
249 lines
6.9 KiB
C
249 lines
6.9 KiB
C
/* packet-nt-tpcp.c
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* Routines for Transparent Proxy Cache Protocol packet disassembly
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* (c) Copyright Giles Scott <giles.scott1 [AT] btinternet.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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* 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 <epan/addr_resolv.h> /* this is for get_hostname and udp_port_to_display */
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void proto_register_tpcp(void);
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void proto_reg_handoff_tpcp(void);
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#define UDP_PORT_TPCP 3121 /* Not IANA registered */
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/* TPCP version1/2 PDU format */
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typedef struct _tpcppdu_t {
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guint8 version; /* PDU version 1 */
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guint8 type; /* PDU type: 1=request, 2=reply, 3=add filter, 4=rem filter */
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/* Version 2 adds 5=add session 6= remove session */
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guint16 flags; /* 0x0001: 0=UDP, 1=TCP*/
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/* 0x0002: 0=NONE, 1=DONT_REDIRECT */
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/* 0x0004: 0=NONE, 1=Xon */
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/* 0x0008: 0=NONE, 1=Xoff */
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guint16 id; /* request/response identification or TTL */
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guint16 cport; /* client UDP or TCP port number */
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guint32 caddr; /* client IPv4 address */
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guint32 saddr; /* server IPV4 address */
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/* tpcp version 2 only*/
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guint32 vaddr; /* Virtual Server IPv4 address */
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guint32 rasaddr; /* RAS server IPv4 address */
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guint32 signature; /* 0x74706370 - tpcp */
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} tpcpdu_t;
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static const value_string type_vals[] = {
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{ 1, "Request" },
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{ 2, "Reply" },
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{ 3, "Add Filter" },
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{ 4, "Remove Filter" },
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/* 5 and 6 are for version 2 only */
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{ 5, "Add Session" },
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{ 6, "Remove Session" },
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{ 0, NULL }
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};
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/* TPCP Flags */
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#define TF_TPCP_UDPTCP 0x0001
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#define TF_TPCP_DONTREDIRECT 0x0002
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#define TF_TPCP_XON 0x0004
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#define TF_TPCP_XOFF 0x0008
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/* Version info */
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#define TPCP_VER_1 1
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#define TPCP_VER_2 2
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#define TPCP_VER_1_LENGTH 16
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#define TPCP_VER_2_LENGTH 28
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/* things we can do filters on */
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static int hf_tpcp_version = -1;
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static int hf_tpcp_type = -1;
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static int hf_tpcp_flags = -1;
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static int hf_tpcp_flags_tcp = -1;
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static int hf_tpcp_flags_redir = -1;
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static int hf_tpcp_flags_xon = -1;
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static int hf_tpcp_flags_xoff = -1;
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static int hf_tpcp_id = -1;
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static int hf_tpcp_cport = -1;
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static int hf_tpcp_caddr = -1;
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static int hf_tpcp_saddr = -1;
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static int hf_tpcp_vaddr = -1;
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static int hf_tpcp_rasaddr = -1;
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static int hf_tpcp_signature = -1;
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static int proto_tpcp = -1;
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static gint ett_tpcp = -1;
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static gint ett_tpcp_flags = -1;
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static int
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dissect_tpcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_tree *tpcp_tree = NULL;
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proto_item *ti;
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guint8 version, type;
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guint16 id, cport;
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static int * const tpcp_flags[] = {
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&hf_tpcp_flags_tcp,
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&hf_tpcp_flags_redir,
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&hf_tpcp_flags_xon,
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&hf_tpcp_flags_xoff,
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NULL
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};
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "TPCP");
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col_clear(pinfo->cinfo, COL_INFO);
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/* need to find out which version!! */
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version = tvb_get_guint8(tvb, 0);
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if ((version != TPCP_VER_1) && (version != TPCP_VER_2)) {
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/* Not us */
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return 0;
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}
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ti = proto_tree_add_protocol_format(tree, proto_tpcp, tvb, 0, -1,
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"Alteon WebSystems - Transparent Proxy Cache Protocol");
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tpcp_tree = proto_item_add_subtree(ti, ett_tpcp);
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proto_tree_add_item(tpcp_tree, hf_tpcp_version, tvb, 0, 1, ENC_BIG_ENDIAN);
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type = tvb_get_guint8(tvb, 1);
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proto_tree_add_item(tpcp_tree, hf_tpcp_type, tvb, 1, 1, ENC_BIG_ENDIAN);
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proto_tree_add_bitmask(tpcp_tree, tvb, 2, hf_tpcp_flags, ett_tpcp_flags, tpcp_flags, ENC_NA);
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id = tvb_get_ntohs(tvb, 4);
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proto_tree_add_item(tpcp_tree, hf_tpcp_id, tvb, 4, 2, ENC_BIG_ENDIAN);
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cport = tvb_get_ntohs(tvb, 6);
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proto_tree_add_uint_format_value(tpcp_tree, hf_tpcp_cport, tvb, 6, 2, cport,
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"%s", udp_port_to_display(pinfo->pool, cport));
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proto_tree_add_item(tpcp_tree, hf_tpcp_caddr, tvb, 8, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(tpcp_tree, hf_tpcp_saddr, tvb, 12, 4, ENC_BIG_ENDIAN);
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if (version == TPCP_VER_2) {
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proto_tree_add_item(tpcp_tree, hf_tpcp_vaddr, tvb, 16, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(tpcp_tree, hf_tpcp_rasaddr, tvb, 20, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(tpcp_tree, hf_tpcp_signature, tvb, 24, 4, ENC_BIG_ENDIAN);
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}
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col_add_fstr(pinfo->cinfo, COL_INFO,"%s id %d CPort %s CIP %s SIP %s",
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val_to_str_const(type, type_vals, "Unknown"),
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id,
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udp_port_to_display(pinfo->pool, cport),
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tvb_ip_to_str(pinfo->pool, tvb, 8),
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tvb_ip_to_str(pinfo->pool, tvb, 12));
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if (version == TPCP_VER_1)
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return TPCP_VER_1_LENGTH;
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return TPCP_VER_2_LENGTH;
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}
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void
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proto_register_tpcp(void)
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{
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static hf_register_info hf[] = {
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{ &hf_tpcp_version,
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{ "Version", "tpcp.version", FT_UINT8, BASE_DEC, NULL, 0x0,
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"TPCP version", HFILL }},
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{ &hf_tpcp_type,
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{ "Type", "tpcp.type", FT_UINT8, BASE_DEC, VALS(type_vals), 0x0,
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"PDU type", HFILL }},
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{ &hf_tpcp_flags,
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{ "Flags", "tpcp.flags", FT_UINT16, BASE_HEX, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_tpcp_flags_tcp,
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{ "UDP/TCP", "tpcp.flags.tcp", FT_BOOLEAN, 8, TFS(&tfs_set_notset), TF_TPCP_UDPTCP,
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"Protocol type", HFILL }},
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{ &hf_tpcp_flags_redir,
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{ "No Redirect", "tpcp.flags.redir", FT_BOOLEAN, 8, TFS(&tfs_set_notset), TF_TPCP_DONTREDIRECT,
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"Don't redirect client", HFILL }},
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{ &hf_tpcp_flags_xon,
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{ "XON", "tpcp.flags.xon", FT_BOOLEAN, 8, TFS(&tfs_set_notset), TF_TPCP_XON,
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NULL, HFILL }},
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{ &hf_tpcp_flags_xoff,
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{ "XOFF", "tpcp.flags.xoff", FT_BOOLEAN, 8, TFS(&tfs_set_notset), TF_TPCP_XOFF,
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NULL, HFILL }},
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{ &hf_tpcp_id,
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{ "Client indent", "tpcp.cid", FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_tpcp_cport,
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{ "Client Source Port", "tpcp.cport", FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_tpcp_caddr,
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{ "Client Source IP address", "tpcp.caddr", FT_IPv4, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_tpcp_saddr,
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{ "Server IP address", "tpcp.saddr", FT_IPv4, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_tpcp_vaddr,
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{ "Virtual Server IP address", "tpcp.vaddr", FT_IPv4, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_tpcp_rasaddr,
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{ "RAS server IP address", "tpcp.rasaddr", FT_IPv4, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_tpcp_signature,
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{ "Signature", "tpcp.signature", FT_UINT32, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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};
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static gint *ett[] = {
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&ett_tpcp,
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&ett_tpcp_flags,
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};
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proto_tpcp = proto_register_protocol("Alteon - Transparent Proxy Cache Protocol", "TPCP", "tpcp");
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proto_register_field_array(proto_tpcp, 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
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proto_reg_handoff_tpcp(void)
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{
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dissector_handle_t tpcp_handle;
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tpcp_handle = create_dissector_handle(dissect_tpcp, proto_tpcp);
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dissector_add_uint_with_preference("udp.port", UDP_PORT_TPCP, tpcp_handle);
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}
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/*
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* Editor modelines - https://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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