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>
264 lines
8.2 KiB
C
264 lines
8.2 KiB
C
/* packet-icp.c
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* Routines for ICP (internet cache protocol) packet disassembly
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* RFC 2186 && RFC 2187
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* By Peter Torvals
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* Copyright 1999 Peter Torvals
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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
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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/expert.h>
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void proto_register_icp(void);
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void proto_reg_handoff_icp(void);
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static int proto_icp = -1;
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static int hf_icp_length = -1;
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static int hf_icp_opcode = -1;
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static int hf_icp_version = -1;
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static int hf_icp_request_nr = -1;
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/* Generated from convert_proto_tree_add_text.pl */
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static int hf_icp_url = -1;
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static int hf_icp_rtt = -1;
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static int hf_icp_object_data = -1;
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static int hf_icp_requester_host_address = -1;
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static int hf_icp_sender_host_ip_address = -1;
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static int hf_icp_option_src_rtt = -1;
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static int hf_icp_object_length = -1;
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static int hf_icp_option_hit_obj = -1;
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static gint ett_icp = -1;
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static gint ett_icp_payload = -1;
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/* Generated from convert_proto_tree_add_text.pl */
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static expert_field ei_icp_fragmented_packet = EI_INIT;
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#define UDP_PORT_ICP 3130
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#define CODE_ICP_OP_QUERY 1
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#define CODE_ICP_OP_INVALID 0
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#define CODE_ICP_OP_HIT 2
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#define CODE_ICP_OP_MISS 3
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#define CODE_ICP_OP_ERR 4
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#define CODE_ICP_OP_SEND 5
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#define CODE_ICP_OP_SENDA 6
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#define CODE_ICP_OP_DATABEG 7
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#define CODE_ICP_OP_DATA 8
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#define CODE_ICP_OP_DATAEND 9
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#define CODE_ICP_OP_SECHO 10
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#define CODE_ICP_OP_DECHO 11
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#define CODE_ICP_OP_MISS_NOFETCH 21
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#define CODE_ICP_OP_DENIED 22
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#define CODE_ICP_OP_HIT_OBJ 23
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static const value_string opcode_vals[] = {
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{ CODE_ICP_OP_INVALID , "ICP_INVALID" },
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{ CODE_ICP_OP_QUERY , "ICP_QUERY" },
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{ CODE_ICP_OP_HIT , "ICP_HIT" },
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{ CODE_ICP_OP_MISS , "ICP_MISS" },
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{ CODE_ICP_OP_ERR , "ICP_ERR" },
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{ CODE_ICP_OP_SEND, "ICP_SEND" },
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{ CODE_ICP_OP_SENDA, "ICP_SENDA"},
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{ CODE_ICP_OP_DATABEG, "ICP_DATABEG"},
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{ CODE_ICP_OP_DATA, "ICP_DATA"},
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{ CODE_ICP_OP_DATAEND, "ICP_DATA_END"},
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{ CODE_ICP_OP_SECHO , "ICP_SECHO"},
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{ CODE_ICP_OP_DECHO , "ICP_DECHO"},
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{ CODE_ICP_OP_MISS_NOFETCH , "ICP_MISS_NOFETCH"},
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{ CODE_ICP_OP_DENIED , "ICP_DENIED"},
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{ CODE_ICP_OP_HIT_OBJ , "ICP_HIT_OBJ"},
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{ 0, NULL}
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};
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static void dissect_icp_payload(tvbuff_t *tvb, packet_info *pinfo, int offset,
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proto_tree *pload_tree, guint8 opcode)
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{
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gint stringlength;
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guint16 objectlength;
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proto_item* object_item;
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switch(opcode)
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{
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case CODE_ICP_OP_QUERY:
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/* 4 byte requester host address */
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proto_tree_add_item(pload_tree, hf_icp_requester_host_address, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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/* null terminated URL */
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stringlength = tvb_strsize(tvb, offset);
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proto_tree_add_item(pload_tree, hf_icp_url, tvb, offset, stringlength, ENC_ASCII|ENC_NA);
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break;
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case CODE_ICP_OP_SECHO:
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case CODE_ICP_OP_DECHO:
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case CODE_ICP_OP_HIT:
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case CODE_ICP_OP_MISS:
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case CODE_ICP_OP_ERR:
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case CODE_ICP_OP_MISS_NOFETCH:
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case CODE_ICP_OP_DENIED:
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stringlength = tvb_strsize(tvb, offset);
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proto_tree_add_item(pload_tree, hf_icp_url, tvb, offset, stringlength, ENC_ASCII|ENC_NA);
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break;
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case CODE_ICP_OP_HIT_OBJ:
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/* null terminated URL */
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stringlength = tvb_strsize(tvb, offset);
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proto_tree_add_item(pload_tree, hf_icp_url, tvb, offset, stringlength, ENC_ASCII|ENC_NA);
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offset += stringlength;
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/* 2 byte object size */
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/* object data not recommended by standard*/
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objectlength=tvb_get_ntohs(tvb, offset);
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proto_tree_add_item(pload_tree, hf_icp_object_length, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* object data not recommended by standard*/
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object_item = proto_tree_add_item(pload_tree, hf_icp_object_data, tvb, offset, objectlength, ENC_NA);
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if (objectlength > tvb_reported_length_remaining(tvb, offset))
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{
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expert_add_info(pinfo, object_item, &ei_icp_fragmented_packet);
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}
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break;
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default:
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break;
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}
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}
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static int dissect_icp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_tree *icp_tree , *payload_tree;
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proto_item *ti;
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guint8 opcode;
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guint16 message_length;
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guint32 request_number;
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guint32 options;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICP");
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col_clear(pinfo->cinfo, COL_INFO);
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opcode=tvb_get_guint8(tvb, 0);
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message_length=tvb_get_ntohs(tvb, 2);
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request_number=tvb_get_ntohl(tvb, 4);
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col_add_fstr(pinfo->cinfo,COL_INFO,"Opcode: %s (%u), Req Nr: %u",
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val_to_str_const(opcode, opcode_vals, "Unknown"), opcode,
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request_number);
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ti = proto_tree_add_item(tree,proto_icp, tvb, 0, message_length, ENC_NA);
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icp_tree = proto_item_add_subtree(ti, ett_icp);
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if (tree)
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{
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proto_tree_add_uint(icp_tree,hf_icp_opcode, tvb, 0, 1, opcode);
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proto_tree_add_item(icp_tree,hf_icp_version, tvb, 1, 1, ENC_BIG_ENDIAN);
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proto_tree_add_uint(icp_tree,hf_icp_length, tvb, 2, 2, message_length);
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proto_tree_add_uint(icp_tree,hf_icp_request_nr, tvb, 4, 4,
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request_number);
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options=tvb_get_ntohl(tvb, 8);
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if ( (opcode == CODE_ICP_OP_QUERY) && ((options & 0x80000000 ) != 0) )
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{
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proto_tree_add_item(icp_tree, hf_icp_option_hit_obj, tvb, 8, 4, ENC_NA);
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}
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if ( (opcode == CODE_ICP_OP_QUERY)&& ((options & 0x40000000 ) != 0) )
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{
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proto_tree_add_item(icp_tree, hf_icp_option_src_rtt, tvb, 8, 4, ENC_NA);
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}
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if ((opcode != CODE_ICP_OP_QUERY)&& ((options & 0x40000000 ) != 0))
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{
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proto_tree_add_item(icp_tree, hf_icp_option_src_rtt, tvb, 8, 4, ENC_NA);
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proto_tree_add_item(icp_tree, hf_icp_rtt, tvb, 12, 4, ENC_BIG_ENDIAN);
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}
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proto_tree_add_item(icp_tree, hf_icp_sender_host_ip_address, tvb, 16, 4, ENC_BIG_ENDIAN);
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}
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payload_tree = proto_tree_add_subtree(icp_tree, tvb,
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20, message_length - 20,
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ett_icp_payload, NULL, "Payload");
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dissect_icp_payload(tvb, pinfo, 20, payload_tree, opcode);
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return tvb_captured_length(tvb);
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}
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void
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proto_register_icp(void)
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{
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static hf_register_info hf[] = {
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{ &hf_icp_opcode,
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{ "Opcode", "icp.opcode", FT_UINT8, BASE_HEX, VALS(opcode_vals),
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0x0, NULL, HFILL }},
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{ &hf_icp_version,
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{ "Version", "icp.version", FT_UINT8, BASE_DEC, NULL,
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0x0, NULL, HFILL }},
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{ &hf_icp_length,
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{ "Length", "icp.length", FT_UINT16, BASE_DEC, NULL,
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0x0, NULL, HFILL }},
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{ &hf_icp_request_nr,
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{ "Request Number", "icp.nr", FT_UINT32, BASE_DEC, NULL,
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0x0, NULL, HFILL }},
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{ &hf_icp_requester_host_address, { "Requester Host Address", "icp.requester_host_address", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_icp_url, { "URL", "icp.url", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_icp_object_length, { "Object length", "icp.object_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
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{ &hf_icp_object_data, { "Object data", "icp.object_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_icp_option_hit_obj, { "Option: ICP_FLAG_HIT_OBJ", "icp.option.hit_obj", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_icp_option_src_rtt, { "Option: ICP_FLAG_SRC_RTT", "icp.option.src_rtt", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_icp_rtt, { "RTT", "icp.rtt", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
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{ &hf_icp_sender_host_ip_address, { "Sender Host IP address", "icp.sender_host_ip_address", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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};
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static gint *ett[] = {
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&ett_icp,
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&ett_icp_payload,
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};
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static ei_register_info ei[] = {
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{ &ei_icp_fragmented_packet, { "icp.fragmented_packet", PI_PROTOCOL, PI_WARN, "Packet is fragmented", EXPFILL }},
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};
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expert_module_t* expert_icp;
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proto_icp = proto_register_protocol("Internet Cache Protocol", "ICP", "icp");
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proto_register_field_array(proto_icp, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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expert_icp = expert_register_protocol(proto_icp);
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expert_register_field_array(expert_icp, ei, array_length(ei));
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}
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void
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proto_reg_handoff_icp(void)
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{
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dissector_handle_t icp_handle;
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icp_handle = create_dissector_handle(dissect_icp, proto_icp);
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dissector_add_uint_with_preference("udp.port", UDP_PORT_ICP, icp_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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