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wireshark/packet-icp.c
Guy Harris ee5ca25d31 Include files from the "epan" directory and subdirectories thereof with 
"epan/..." pathnames, so as to avoid collisions with header files in any
of the directories in which we look (e.g., "proto.h", as some other
package has its own "proto.h" file which it installs in the top-level
include directory).

Don't add "-I" flags to search "epan", as that's no longer necessary
(and we want includes of "epan" headers to fail if the "epan/" is left
out, so that we don't re-introduce includes lacking "epan/").

svn path=/trunk/; revision=4586
2002-01-21 07:37:49 +00:00

263 lines
7.4 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
*
* $Id: packet-icp.c,v 1.21 2002/01/21 07:36:35 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#define MAX_TEXTBUF_LENGTH 600
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/resolv.h>
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;
static gint ett_icp = -1;
static gint ett_icp_payload = -1;
#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 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, int offset,
proto_tree *pload_tree, guint8 opcode)
{
gint stringlength;
guint16 objectlength;
switch(opcode)
{
case CODE_ICP_OP_QUERY:
/* 4 byte requester host address */
proto_tree_add_text(pload_tree, tvb,offset,4,
"Requester Host Address %s",
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
offset += 4;
/* null terminated URL */
stringlength = tvb_strsize(tvb, offset);
proto_tree_add_text(pload_tree, tvb, offset, stringlength,
"URL: %s", tvb_get_ptr(tvb, offset, stringlength));
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_text(pload_tree, tvb, offset, stringlength,
"URL: %s", tvb_get_ptr(tvb, offset, stringlength));
break;
case CODE_ICP_OP_HIT_OBJ:
/* null terminated URL */
stringlength = tvb_strsize(tvb, offset);
proto_tree_add_text(pload_tree, tvb, offset, stringlength,
"URL: %s", tvb_get_ptr(tvb, offset, stringlength));
offset += stringlength;
/* 2 byte object size */
/* object data not recommended by standard*/
objectlength=tvb_get_ntohs(tvb, offset);
proto_tree_add_text(pload_tree, tvb,offset,2,"Object length: %u", objectlength);
offset += 2;
/* object data not recommended by standard*/
proto_tree_add_text(pload_tree, tvb,offset,objectlength,"Object data");
if (objectlength > tvb_reported_length_remaining(tvb, offset))
{
proto_tree_add_text(pload_tree, tvb,offset,0,
"Packet is fragmented, rest of object is in next udp packet");
}
break;
default:
break;
}
}
static void dissect_icp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *icp_tree , *payload_tree;
proto_item *ti , *payloadtf;
guint8 opcode;
guint16 message_length;
guint32 request_number;
guint32 options;
guint32 option_data;
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICP");
if (check_col(pinfo->cinfo, COL_INFO))
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);
if (check_col(pinfo->cinfo, COL_INFO))
{
col_add_fstr(pinfo->cinfo,COL_INFO,"Opcode: %s (%u), Req Nr: %u",
val_to_str(opcode, opcode_vals, "Unknown"), opcode,
request_number);
}
if (tree)
{
ti = proto_tree_add_item(tree,proto_icp, tvb, 0, message_length, FALSE);
icp_tree = proto_item_add_subtree(ti, ett_icp);
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, FALSE);
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_text(icp_tree, tvb,8,4,
"option: ICP_FLAG_HIT_OBJ");
}
if ( (opcode == CODE_ICP_OP_QUERY)&& ((options & 0x40000000 ) != 0) )
{
proto_tree_add_text(icp_tree, tvb,8,4,
"option:ICP_FLAG_SRC_RTT");
}
if ((opcode != CODE_ICP_OP_QUERY)&& ((options & 0x40000000 ) != 0))
{
option_data=tvb_get_ntohl(tvb, 12);
proto_tree_add_text(icp_tree, tvb,8,8,
"option: ICP_FLAG_SCR_RTT RTT=%u",
option_data & 0x0000ffff);
}
proto_tree_add_text(icp_tree, tvb, 16, 4,
"Sender Host IP address %s",
ip_to_str(tvb_get_ptr(tvb, 16, 4)));
payloadtf = proto_tree_add_text(icp_tree, tvb,
20, message_length - 20,
"Payload");
payload_tree = proto_item_add_subtree(payloadtf, ett_icp_payload);
dissect_icp_payload(tvb, 20, payload_tree, opcode);
}
}
void
proto_register_icp(void)
{
static hf_register_info hf[] = {
{ &hf_icp_opcode,
{ "Opcode", "icp.opcode", FT_UINT8, BASE_HEX, VALS(opcode_vals),
0x0, "", HFILL }},
{ &hf_icp_version,
{ "Version", "icp.version", FT_UINT8, BASE_DEC, NULL,
0x0, "", HFILL }},
{ &hf_icp_length,
{ "Length", "icp.length", FT_UINT16, BASE_DEC, NULL,
0x0, "", HFILL }},
{ &hf_icp_request_nr,
{ "Request Number", "icp.nr", FT_UINT32, BASE_DEC, NULL,
0x0, "", HFILL }},
};
static gint *ett[] = {
&ett_icp,
&ett_icp_payload,
};
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));
}
void
proto_reg_handoff_icp(void)
{
dissector_handle_t icp_handle;
icp_handle = create_dissector_handle(dissect_icp, proto_icp);
dissector_add("udp.port", UDP_PORT_ICP, icp_handle);
}
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