forked from osmocom/wireshark
209 lines
6.4 KiB
C
209 lines
6.4 KiB
C
/* packet-aarp.c
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* Routines for Appletalk ARP packet disassembly
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*
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* $Id: packet-aarp.c,v 1.10 1999/10/03 15:21:11 deniel Exp $
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*
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* Simon Wilkinson <sxw@dcs.ed.ac.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <stdio.h>
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#include <glib.h>
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#include "packet.h"
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#include "etypes.h"
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static int proto_aarp = -1;
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static int hf_aarp_hard_type = -1;
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static int hf_aarp_proto_type = -1;
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static int hf_aarp_hard_size = -1;
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static int hf_aarp_proto_size = -1;
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static int hf_aarp_opcode = -1;
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static int hf_aarp_src_ether = -1;
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static int hf_aarp_src_id = -1;
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static int hf_aarp_dst_ether = -1;
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static int hf_aarp_dst_id = -1;
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typedef struct _e_ether_aarp {
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guint16 htype, ptype;
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guint8 halen, palen;
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guint16 op;
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guint8 hsaddr[6];
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guint8 psaddr[4];
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guint8 hdaddr[6];
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guint8 pdaddr[4];
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} e_ether_aarp;
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#ifndef AARP_REQUEST
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#define AARP_REQUEST 0x0001
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#endif
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#ifndef AARP_REPLY
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#define AARP_REPLY 0x0002
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#endif
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#ifndef AARP_PROBE
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#define AARP_PROBE 0x0003
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#endif
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gchar *
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atalkid_to_str(guint8 *ad) {
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gint node;
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static gchar str[3][16];
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static gchar *cur;
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if (cur == &str[0][0]) {
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cur = &str[1][0];
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} else if (cur == &str[1][0]) {
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cur = &str[2][0];
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} else {
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cur = &str[0][0];
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}
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node=ad[1]<<8|ad[2];
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sprintf(cur, "%d.%d",node,ad[3]);
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return cur;
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}
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void
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dissect_aarp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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e_ether_aarp ea;
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proto_tree *aarp_tree;
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proto_item *ti;
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gchar *op_str;
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value_string op_vals[] = { {AARP_REQUEST, "AARP request" },
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{AARP_REPLY, "AARP reply" },
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{AARP_PROBE, "AARP probe" },
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{0, NULL } };
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if (!BYTES_ARE_IN_FRAME(offset, sizeof(e_ether_aarp))) {
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dissect_data(pd, offset, fd, tree);
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return;
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}
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ea.htype = pntohs(&pd[offset]);
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ea.ptype = pntohs(&pd[offset + 2]);
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ea.halen = (guint8) pd[offset + 4];
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ea.palen = (guint8) pd[offset + 5];
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ea.op = pntohs(&pd[offset + 6]);
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memcpy(&ea.hsaddr, &pd[offset + 8], 6);
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memcpy(&ea.psaddr, &pd[offset + 14], 4);
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memcpy(&ea.hdaddr, &pd[offset + 18], 6);
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memcpy(&ea.pdaddr, &pd[offset + 24], 4);
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if(check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "AARP");
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if (tree) {
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if ((op_str = match_strval(ea.op, op_vals)))
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ti = proto_tree_add_item_format(tree, proto_aarp, offset, 28, NULL, op_str);
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else
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ti = proto_tree_add_item_format(tree, proto_aarp, offset, 28, NULL,
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"Unknown AARP (opcode 0x%04x)", ea.op);
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aarp_tree = proto_item_add_subtree(ti, ETT_AARP);
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proto_tree_add_item_format(aarp_tree, hf_aarp_hard_type, offset, 2,
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ea.htype,
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"Hardware type: 0x%04x",
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ea.htype);
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proto_tree_add_item_format(aarp_tree, hf_aarp_proto_type, offset + 2, 2,
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ea.ptype,
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"Protocol type: 0x%04x",
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ea.ptype);
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proto_tree_add_item_format(aarp_tree, hf_aarp_hard_size, offset + 4, 1,
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ea.halen,
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"Hardware size: 0x%02x",
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ea.halen);
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proto_tree_add_item_format(aarp_tree, hf_aarp_proto_size, offset + 5, 1,
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ea.palen,
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"Protocol size: 0x%02x",
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ea.palen);
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proto_tree_add_item_format(aarp_tree, hf_aarp_opcode, offset + 6, 2,
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ea.op,
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"Opcode: 0x%04x (%s)",
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ea.op, op_str ? op_str : "Unknown");
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proto_tree_add_item(aarp_tree, hf_aarp_src_ether, offset + 8, 6,
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ea.hsaddr);
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proto_tree_add_item_format(aarp_tree, hf_aarp_src_id, offset + 14, 4,
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ea.psaddr,
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"Sender ID: %s",
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atalkid_to_str((guint8 *) ea.psaddr));
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proto_tree_add_item(aarp_tree, hf_aarp_dst_ether, offset + 18, 6,
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ea.hdaddr);
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proto_tree_add_item_format(aarp_tree, hf_aarp_dst_id, offset + 24, 4,
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ea.pdaddr,
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"Target ID: %s",
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atalkid_to_str((guint8 *) ea.pdaddr));
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}
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if (ea.ptype != ETHERTYPE_AARP && ea.ptype != ETHERTYPE_ATALK &&
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check_col(fd, COL_INFO)) {
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col_add_fstr(fd, COL_INFO, "h/w %d (%d) prot %d (%d) op 0x%04x",
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ea.htype, ea.halen, ea.ptype, ea.palen, ea.op);
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return;
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}
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if (check_col(fd, COL_INFO)) {
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switch (ea.op) {
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case AARP_REQUEST:
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col_add_fstr(fd, COL_INFO, "Who has %s? Tell %s",
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atalkid_to_str((guint8 *) ea.pdaddr), atalkid_to_str((guint8 *) ea.psaddr));
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break;
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case AARP_REPLY:
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col_add_fstr(fd, COL_INFO, "%s is at %s",
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atalkid_to_str((guint8 *) ea.psaddr),
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ether_to_str((guint8 *) ea.hsaddr));
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break;
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case AARP_PROBE:
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col_add_fstr(fd, COL_INFO, "Is there a %s",
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atalkid_to_str((guint8 *) ea.pdaddr));
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break;
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}
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}
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}
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void
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proto_register_aarp(void)
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{
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static hf_register_info hf[] = {
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{ &hf_aarp_hard_type,
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{ "Hardware type", "aarp.hard.type", FT_UINT16, NULL }},
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{ &hf_aarp_proto_type,
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{ "Protocol type", "aarp.proto.type", FT_UINT16, NULL }},
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{ &hf_aarp_hard_size,
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{ "Hardware size", "aarp.hard.size", FT_UINT8, NULL }},
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{ &hf_aarp_proto_size,
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{ "Protocol size", "aarp.proto.size", FT_UINT8, NULL }},
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{ &hf_aarp_opcode,
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{ "Opcode", "aarp.opcode", FT_UINT16, NULL }},
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{ &hf_aarp_src_ether,
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{ "Sender ether", "aarp.src.ether", FT_ETHER, NULL }},
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{ &hf_aarp_src_id,
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{ "Sender ID", "aarp.src.id", FT_UINT32, NULL }},
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{ &hf_aarp_dst_ether,
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{ "Target ether", "aarp.dst.ether", FT_ETHER, NULL }},
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{ &hf_aarp_dst_id,
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{ "Target ID", "aarp.dst.id", FT_UINT32, NULL }}
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};
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proto_aarp = proto_register_protocol("Appletalk Address Resolution Protocol",
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"aarp");
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proto_register_field_array(proto_aarp, hf, array_length(hf));
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}
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