forked from osmocom/wireshark
23319ff023
structure to the "packet_info" structure; only stuff that's permanently stored with each frame should be in the "frame_data" structure, and the "column_info" structure is not guaranteed to hold the column values for that frame at all times - it was only in the "frame_data" structure so that it could be passed to dissectors, and, as all dissectors are now passed a pointer to a "packet_info" structure, it could just as well be put in the "packet_info" structure. That saves memory, by shrinking the "frame_data" structure (there's one of those per frame), and also lets us clean up the code a bit. svn path=/trunk/; revision=4370
301 lines
8.7 KiB
C
301 lines
8.7 KiB
C
/* packet-aarp.c
|
|
* Routines for Appletalk ARP packet disassembly
|
|
*
|
|
* $Id: packet-aarp.c,v 1.33 2001/12/10 00:25:25 guy Exp $
|
|
*
|
|
* Simon Wilkinson <sxw@dcs.ed.ac.uk>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
# include <sys/types.h>
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <glib.h>
|
|
#include "packet.h"
|
|
#include "strutil.h"
|
|
#include "etypes.h"
|
|
|
|
static int proto_aarp = -1;
|
|
static int hf_aarp_hard_type = -1;
|
|
static int hf_aarp_proto_type = -1;
|
|
static int hf_aarp_hard_size = -1;
|
|
static int hf_aarp_proto_size = -1;
|
|
static int hf_aarp_opcode = -1;
|
|
static int hf_aarp_src_ether = -1;
|
|
static int hf_aarp_src_id = -1;
|
|
static int hf_aarp_dst_ether = -1;
|
|
static int hf_aarp_dst_id = -1;
|
|
|
|
static gint ett_aarp = -1;
|
|
|
|
#ifndef AARP_REQUEST
|
|
#define AARP_REQUEST 0x0001
|
|
#endif
|
|
#ifndef AARP_REPLY
|
|
#define AARP_REPLY 0x0002
|
|
#endif
|
|
#ifndef AARP_PROBE
|
|
#define AARP_PROBE 0x0003
|
|
#endif
|
|
|
|
/* The following is screwed up shit to deal with the fact that
|
|
the linux kernel edits the packet inline. */
|
|
#define AARP_REQUEST_SWAPPED 0x0100
|
|
#define AARP_REPLY_SWAPPED 0x0200
|
|
#define AARP_PROBE_SWAPPED 0x0300
|
|
|
|
static const value_string op_vals[] = {
|
|
{AARP_REQUEST, "request" },
|
|
{AARP_REPLY, "reply" },
|
|
{AARP_PROBE, "probe" },
|
|
{AARP_REQUEST_SWAPPED, "request" },
|
|
{AARP_REPLY_SWAPPED, "reply" },
|
|
{AARP_PROBE_SWAPPED, "probe" },
|
|
{0, NULL } };
|
|
|
|
/* AARP protocol HARDWARE identifiers. */
|
|
#define AARPHRD_ETHER 1 /* Ethernet 10Mbps */
|
|
#define AARPHRD_TR 2 /* Token Ring */
|
|
|
|
static const value_string hrd_vals[] = {
|
|
{AARPHRD_ETHER, "Ethernet" },
|
|
{AARPHRD_TR, "Token Ring" },
|
|
{0, NULL } };
|
|
|
|
static gchar *
|
|
atalkid_to_str(const guint8 *ad) {
|
|
gint node;
|
|
static gchar str[3][16];
|
|
static gchar *cur;
|
|
|
|
if (cur == &str[0][0]) {
|
|
cur = &str[1][0];
|
|
} else if (cur == &str[1][0]) {
|
|
cur = &str[2][0];
|
|
} else {
|
|
cur = &str[0][0];
|
|
}
|
|
|
|
node=ad[1]<<8|ad[2];
|
|
sprintf(cur, "%d.%d",node,ad[3]);
|
|
return cur;
|
|
}
|
|
|
|
static gchar *
|
|
aarphrdaddr_to_str(const guint8 *ad, int ad_len, guint16 type) {
|
|
if ((type == AARPHRD_ETHER || type == AARPHRD_TR) && ad_len == 6) {
|
|
/* Ethernet address (or Token Ring address, which is the same type
|
|
of address). */
|
|
return ether_to_str(ad);
|
|
}
|
|
return bytes_to_str(ad, ad_len);
|
|
}
|
|
|
|
static gchar *
|
|
aarpproaddr_to_str(const guint8 *ad, int ad_len, guint16 type) {
|
|
if (type == ETHERTYPE_ATALK && ad_len == 4) {
|
|
/* IP address. */
|
|
return atalkid_to_str(ad);
|
|
}
|
|
return bytes_to_str(ad, ad_len);
|
|
}
|
|
|
|
/* Offsets of fields within an AARP packet. */
|
|
#define AR_HRD 0
|
|
#define AR_PRO 2
|
|
#define AR_HLN 4
|
|
#define AR_PLN 5
|
|
#define AR_OP 6
|
|
#define MIN_AARP_HEADER_SIZE 8
|
|
|
|
static void
|
|
dissect_aarp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
|
|
guint16 ar_hrd;
|
|
guint16 ar_pro;
|
|
guint8 ar_hln;
|
|
guint8 ar_pln;
|
|
guint16 ar_op;
|
|
proto_tree *aarp_tree;
|
|
proto_item *ti;
|
|
gchar *op_str;
|
|
int sha_offset, spa_offset, tha_offset, tpa_offset;
|
|
const guint8 *sha_val, *spa_val, *tha_val, *tpa_val;
|
|
gchar *sha_str, *spa_str, *tha_str, *tpa_str;
|
|
|
|
if(check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AARP");
|
|
if(check_col(pinfo->cinfo, COL_INFO))
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
ar_hrd = tvb_get_ntohs(tvb, AR_HRD);
|
|
ar_pro = tvb_get_ntohs(tvb, AR_PRO);
|
|
ar_hln = tvb_get_guint8(tvb, AR_HLN);
|
|
ar_pln = tvb_get_guint8(tvb, AR_PLN);
|
|
ar_op = tvb_get_ntohs(tvb, AR_OP);
|
|
|
|
/* Extract the addresses. */
|
|
sha_offset = MIN_AARP_HEADER_SIZE;
|
|
sha_val = tvb_get_ptr(tvb, sha_offset, ar_hln);
|
|
sha_str = aarphrdaddr_to_str(sha_val, ar_hln, ar_hrd);
|
|
|
|
spa_offset = sha_offset + ar_hln;
|
|
spa_val = tvb_get_ptr(tvb, spa_offset, ar_pln);
|
|
spa_str = aarpproaddr_to_str(spa_val, ar_pln, ar_pro);
|
|
|
|
tha_offset = spa_offset + ar_pln;
|
|
tha_val = tvb_get_ptr(tvb, tha_offset, ar_hln);
|
|
tha_str = aarphrdaddr_to_str(tha_val, ar_hln, ar_hrd);
|
|
|
|
tpa_offset = tha_offset + ar_hln;
|
|
tpa_val = tvb_get_ptr(tvb, tpa_offset, ar_pln);
|
|
tpa_str = aarpproaddr_to_str(tpa_val, ar_pln, ar_pro);
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
switch (ar_op) {
|
|
case AARP_REQUEST:
|
|
case AARP_REQUEST_SWAPPED:
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "Who has %s? Tell %s", tpa_str, spa_str);
|
|
break;
|
|
case AARP_REPLY:
|
|
case AARP_REPLY_SWAPPED:
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s is at %s", spa_str, sha_str);
|
|
break;
|
|
case AARP_PROBE:
|
|
case AARP_PROBE_SWAPPED:
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "Is there a %s", tpa_str);
|
|
break;
|
|
default:
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown AARP opcode 0x%04x", ar_op);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (tree) {
|
|
if ((op_str = match_strval(ar_op, op_vals)))
|
|
ti = proto_tree_add_protocol_format(tree, proto_aarp, tvb, 0,
|
|
MIN_AARP_HEADER_SIZE + 2*ar_hln +
|
|
2*ar_pln, "AppleTalk Address Resolution Protocol (%s)", op_str);
|
|
else
|
|
ti = proto_tree_add_protocol_format(tree, proto_aarp, tvb, 0,
|
|
MIN_AARP_HEADER_SIZE + 2*ar_hln +
|
|
2*ar_pln,
|
|
"AppleTalk Address Resolution Protocol (opcode 0x%04x)", ar_op);
|
|
aarp_tree = proto_item_add_subtree(ti, ett_aarp);
|
|
proto_tree_add_uint(aarp_tree, hf_aarp_hard_type, tvb, AR_HRD, 2,
|
|
ar_hrd);
|
|
proto_tree_add_uint(aarp_tree, hf_aarp_proto_type, tvb, AR_PRO, 2,
|
|
ar_pro);
|
|
proto_tree_add_uint(aarp_tree, hf_aarp_hard_size, tvb, AR_HLN, 1,
|
|
ar_hln);
|
|
proto_tree_add_uint(aarp_tree, hf_aarp_proto_size, tvb, AR_PLN, 1,
|
|
ar_pln);
|
|
proto_tree_add_uint(aarp_tree, hf_aarp_opcode, tvb, AR_OP, 2,
|
|
ar_op);
|
|
proto_tree_add_bytes_format(aarp_tree, hf_aarp_src_ether, tvb, sha_offset, ar_hln,
|
|
sha_val,
|
|
"Sender hardware address: %s", sha_str);
|
|
proto_tree_add_bytes_format(aarp_tree, hf_aarp_src_id, tvb, spa_offset, ar_pln,
|
|
spa_val,
|
|
"Sender ID: %s", spa_str);
|
|
proto_tree_add_bytes_format(aarp_tree, hf_aarp_dst_ether, tvb, tha_offset, ar_hln,
|
|
tha_val,
|
|
"Target hardware address: %s", tha_str);
|
|
proto_tree_add_bytes_format(aarp_tree, hf_aarp_dst_id, tvb, tpa_offset, ar_pln,
|
|
tpa_val,
|
|
"Target ID: %s", tpa_str);
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_register_aarp(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_aarp_hard_type,
|
|
{ "Hardware type", "aarp.hard.type",
|
|
FT_UINT16, BASE_HEX, VALS(hrd_vals), 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_aarp_proto_type,
|
|
{ "Protocol type", "aarp.proto.type",
|
|
FT_UINT16, BASE_HEX, VALS(etype_vals), 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_aarp_hard_size,
|
|
{ "Hardware size", "aarp.hard.size",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_aarp_proto_size,
|
|
{ "Protocol size", "aarp.proto.size",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_aarp_opcode,
|
|
{ "Opcode", "aarp.opcode",
|
|
FT_UINT16, BASE_DEC, VALS(op_vals), 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_aarp_src_ether,
|
|
{ "Sender ether", "aarp.src.ether",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_aarp_src_id,
|
|
{ "Sender ID", "aarp.src.id",
|
|
FT_BYTES, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_aarp_dst_ether,
|
|
{ "Target ether", "aarp.dst.ether",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_aarp_dst_id,
|
|
{ "Target ID", "aarp.dst.id",
|
|
FT_BYTES, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_aarp,
|
|
};
|
|
|
|
proto_aarp = proto_register_protocol("Appletalk Address Resolution Protocol",
|
|
"AARP",
|
|
"aarp");
|
|
proto_register_field_array(proto_aarp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_aarp(void)
|
|
{
|
|
dissector_handle_t aarp_handle;
|
|
|
|
aarp_handle = create_dissector_handle(dissect_aarp, proto_aarp);
|
|
dissector_add("ethertype", ETHERTYPE_AARP, aarp_handle);
|
|
dissector_add("chdlctype", ETHERTYPE_AARP, aarp_handle);
|
|
}
|