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wireshark/epan/dissectors/packet-icp.c
Michael Mann 2eb7b05b8c Convert most UDP dissectors to use "auto" preferences. 
Similar to the "tcp.port" changes in I99604f95d426ad345f4b494598d94178b886eb67,
convert dissectors that use "udp.port".

More cleanup done on dissectors that use both TCP and UDP dissector
tables, so that less preference callbacks exist.

Change-Id: If07be9b9e850c244336a7069599cd554ce312dd3
Reviewed-on: https://code.wireshark.org/review/18120
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
2016-10-13 02:51:18 +00:00

276 lines
8.9 KiB
C
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/* packet-icp.c
* Routines for ICP (internet cache protocol) packet disassembly
* RFC 2186 && RFC 2187
* By Peter Torvals
* Copyright 1999 Peter Torvals
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998
*
* 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.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
void proto_register_icp(void);
void proto_reg_handoff_icp(void);
static int proto_icp = -1;
static int hf_icp_length = -1;
static int hf_icp_opcode = -1;
static int hf_icp_version = -1;
static int hf_icp_request_nr = -1;
/* Generated from convert_proto_tree_add_text.pl */
static int hf_icp_url = -1;
static int hf_icp_rtt = -1;
static int hf_icp_object_data = -1;
static int hf_icp_requester_host_address = -1;
static int hf_icp_sender_host_ip_address = -1;
static int hf_icp_option_src_rtt = -1;
static int hf_icp_object_length = -1;
static int hf_icp_option_hit_obj = -1;
static gint ett_icp = -1;
static gint ett_icp_payload = -1;
/* Generated from convert_proto_tree_add_text.pl */
static expert_field ei_icp_fragmented_packet = EI_INIT;
#define UDP_PORT_ICP 3130
#define CODE_ICP_OP_QUERY 1
#define CODE_ICP_OP_INVALID 0
#define CODE_ICP_OP_HIT 2
#define CODE_ICP_OP_MISS 3
#define CODE_ICP_OP_ERR 4
#define CODE_ICP_OP_SEND 5
#define CODE_ICP_OP_SENDA 6
#define CODE_ICP_OP_DATABEG 7
#define CODE_ICP_OP_DATA 8
#define CODE_ICP_OP_DATAEND 9
#define CODE_ICP_OP_SECHO 10
#define CODE_ICP_OP_DECHO 11
#define CODE_ICP_OP_MISS_NOFETCH 21
#define CODE_ICP_OP_DENIED 22
#define CODE_ICP_OP_HIT_OBJ 23
static const value_string opcode_vals[] = {
{ CODE_ICP_OP_INVALID , "ICP_INVALID" },
{ CODE_ICP_OP_QUERY , "ICP_QUERY" },
{ CODE_ICP_OP_HIT , "ICP_HIT" },
{ CODE_ICP_OP_MISS , "ICP_MISS" },
{ CODE_ICP_OP_ERR , "ICP_ERR" },
{ CODE_ICP_OP_SEND, "ICP_SEND" },
{ CODE_ICP_OP_SENDA, "ICP_SENDA"},
{ CODE_ICP_OP_DATABEG, "ICP_DATABEG"},
{ CODE_ICP_OP_DATA, "ICP_DATA"},
{ CODE_ICP_OP_DATAEND, "ICP_DATA_END"},
{ CODE_ICP_OP_SECHO , "ICP_SECHO"},
{ CODE_ICP_OP_DECHO , "ICP_DECHO"},
{ CODE_ICP_OP_MISS_NOFETCH , "ICP_MISS_NOFETCH"},
{ CODE_ICP_OP_DENIED , "ICP_DENIED"},
{ CODE_ICP_OP_HIT_OBJ , "ICP_HIT_OBJ"},
{ 0, NULL}
};
static void dissect_icp_payload(tvbuff_t *tvb, packet_info *pinfo, int offset,
proto_tree *pload_tree, guint8 opcode)
{
gint stringlength;
guint16 objectlength;
proto_item* object_item;
switch(opcode)
{
case CODE_ICP_OP_QUERY:
/* 4 byte requester host address */
proto_tree_add_item(pload_tree, hf_icp_requester_host_address, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
/* null terminated URL */
stringlength = tvb_strsize(tvb, offset);
proto_tree_add_item(pload_tree, hf_icp_url, tvb, offset, stringlength, ENC_ASCII|ENC_NA);
break;
case CODE_ICP_OP_SECHO:
case CODE_ICP_OP_DECHO:
case CODE_ICP_OP_HIT:
case CODE_ICP_OP_MISS:
case CODE_ICP_OP_ERR:
case CODE_ICP_OP_MISS_NOFETCH:
case CODE_ICP_OP_DENIED:
stringlength = tvb_strsize(tvb, offset);
proto_tree_add_item(pload_tree, hf_icp_url, tvb, offset, stringlength, ENC_ASCII|ENC_NA);
break;
case CODE_ICP_OP_HIT_OBJ:
/* null terminated URL */
stringlength = tvb_strsize(tvb, offset);
proto_tree_add_item(pload_tree, hf_icp_url, tvb, offset, stringlength, ENC_ASCII|ENC_NA);
offset += stringlength;
/* 2 byte object size */
/* object data not recommended by standard*/
objectlength=tvb_get_ntohs(tvb, offset);
proto_tree_add_item(pload_tree, hf_icp_object_length, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* object data not recommended by standard*/
object_item = proto_tree_add_item(pload_tree, hf_icp_object_data, tvb, offset, objectlength, ENC_NA);
if (objectlength > tvb_reported_length_remaining(tvb, offset))
{
expert_add_info(pinfo, object_item, &ei_icp_fragmented_packet);
}
break;
default:
break;
}
}
static int dissect_icp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *icp_tree , *payload_tree;
proto_item *ti;
guint8 opcode;
guint16 message_length;
guint32 request_number;
guint32 options;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICP");
col_clear(pinfo->cinfo, COL_INFO);
opcode=tvb_get_guint8(tvb, 0);
message_length=tvb_get_ntohs(tvb, 2);
request_number=tvb_get_ntohl(tvb, 4);
col_add_fstr(pinfo->cinfo,COL_INFO,"Opcode: %s (%u), Req Nr: %u",
val_to_str_const(opcode, opcode_vals, "Unknown"), opcode,
request_number);
ti = proto_tree_add_item(tree,proto_icp, tvb, 0, message_length, ENC_NA);
icp_tree = proto_item_add_subtree(ti, ett_icp);
if (tree)
{
proto_tree_add_uint(icp_tree,hf_icp_opcode, tvb, 0, 1, opcode);
proto_tree_add_item(icp_tree,hf_icp_version, tvb, 1, 1, ENC_BIG_ENDIAN);
proto_tree_add_uint(icp_tree,hf_icp_length, tvb, 2, 2, message_length);
proto_tree_add_uint(icp_tree,hf_icp_request_nr, tvb, 4, 4,
request_number);
options=tvb_get_ntohl(tvb, 8);
if ( (opcode == CODE_ICP_OP_QUERY) && ((options & 0x80000000 ) != 0) )
{
proto_tree_add_item(icp_tree, hf_icp_option_hit_obj, tvb, 8, 4, ENC_NA);
}
if ( (opcode == CODE_ICP_OP_QUERY)&& ((options & 0x40000000 ) != 0) )
{
proto_tree_add_item(icp_tree, hf_icp_option_src_rtt, tvb, 8, 4, ENC_NA);
}
if ((opcode != CODE_ICP_OP_QUERY)&& ((options & 0x40000000 ) != 0))
{
proto_tree_add_item(icp_tree, hf_icp_option_src_rtt, tvb, 8, 4, ENC_NA);
proto_tree_add_item(icp_tree, hf_icp_rtt, tvb, 12, 4, ENC_BIG_ENDIAN);
}
proto_tree_add_item(icp_tree, hf_icp_sender_host_ip_address, tvb, 16, 4, ENC_BIG_ENDIAN);
}
payload_tree = proto_tree_add_subtree(icp_tree, tvb,
20, message_length - 20,
ett_icp_payload, NULL, "Payload");
dissect_icp_payload(tvb, pinfo, 20, payload_tree, opcode);
return tvb_captured_length(tvb);
}
void
proto_register_icp(void)
{
static hf_register_info hf[] = {
{ &hf_icp_opcode,
{ "Opcode", "icp.opcode", FT_UINT8, BASE_HEX, VALS(opcode_vals),
0x0, NULL, HFILL }},
{ &hf_icp_version,
{ "Version", "icp.version", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL }},
{ &hf_icp_length,
{ "Length", "icp.length", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL }},
{ &hf_icp_request_nr,
{ "Request Number", "icp.nr", FT_UINT32, BASE_DEC, NULL,
0x0, NULL, HFILL }},
{ &hf_icp_requester_host_address, { "Requester Host Address", "icp.requester_host_address", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_icp_url, { "URL", "icp.url", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_icp_object_length, { "Object length", "icp.object_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_icp_object_data, { "Object data", "icp.object_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_icp_option_hit_obj, { "Option: ICP_FLAG_HIT_OBJ", "icp.option.hit_obj", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_icp_option_src_rtt, { "Option: ICP_FLAG_SRC_RTT", "icp.option.src_rtt", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_icp_rtt, { "RTT", "icp.rtt", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_icp_sender_host_ip_address, { "Sender Host IP address", "icp.sender_host_ip_address", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
};
static gint *ett[] = {
&ett_icp,
&ett_icp_payload,
};
static ei_register_info ei[] = {
{ &ei_icp_fragmented_packet, { "icp.fragmented_packet", PI_PROTOCOL, PI_WARN, "Packet is fragmented", EXPFILL }},
};
expert_module_t* expert_icp;
proto_icp = proto_register_protocol("Internet Cache Protocol", "ICP", "icp");
proto_register_field_array(proto_icp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_icp = expert_register_protocol(proto_icp);
expert_register_field_array(expert_icp, ei, array_length(ei));
}
void
proto_reg_handoff_icp(void)
{
dissector_handle_t icp_handle;
icp_handle = create_dissector_handle(dissect_icp, proto_icp);
dissector_add_uint_with_preference("udp.port", UDP_PORT_ICP, icp_handle);
}
/*
* 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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