packet-rx.c

   1 /* packet-rx.c
   2  * Routines for RX packet dissection
   3  * Copyright 1999, Nathan Neulinger <nneul@umr.edu>
   4  * Based on routines from tcpdump patches by
   5  *   Ken Hornstein <kenh@cmf.nrl.navy.mil>
   6  *
   7  * $Id: packet-rx.c,v 1.8 2000/02/15 21:03:05 gram Exp $
   8  *
   9  * Ethereal - Network traffic analyzer
  10  * By Gerald Combs <gerald@zing.org>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * Copied from packet-tftp.c
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #include <stdio.h>
  35
  36 #ifdef HAVE_SYS_TYPES_H
  37 # include <sys/types.h>
  38 #endif
  39
  40 #ifdef HAVE_NETINET_IN_H
  41 # include <netinet/in.h>
  42 #endif
  43
  44 #include <string.h>
  45 #include <glib.h>
  46 #include "packet.h"
  47 #include "packet-rx.h"
  48 #include "packet-afs.h"
  49 #include "resolv.h"
  50
  51 static const value_string rx_types[] = {
  52         { RX_PACKET_TYPE_DATA,          "data" },
  53         { RX_PACKET_TYPE_ACK,           "ack" },
  54         { RX_PACKET_TYPE_BUSY,          "busy" },
  55         { RX_PACKET_TYPE_ABORT,         "abort" },
  56         { RX_PACKET_TYPE_ACKALL,        "ackall" },
  57         { RX_PACKET_TYPE_CHALLENGE,     "challenge" },
  58         { RX_PACKET_TYPE_RESPONSE,      "response" },
  59         { RX_PACKET_TYPE_DEBUG,         "debug" },
  60         { RX_PACKET_TYPE_PARAMS,        "params" },
  61         { RX_PACKET_TYPE_VERSION,       "version" },
  62         { 0,                            NULL },
  63 };
  64
  65 static const value_string rx_flags[] = {
  66         { RX_CLIENT_INITIATED,  "client-init" },
  67         { RX_REQUEST_ACK,       "req-ack" },
  68         { RX_LAST_PACKET,       "last-pckt" },
  69         { RX_MORE_PACKETS,      "more-pckts" },
  70         { RX_FREE_PACKET,       "free-pckt" }
  71 };
  72
  73 static int proto_rx = -1;
  74
  75 static int hf_rx_epoch = -1;
  76 static int hf_rx_cid = -1;
  77 static int hf_rx_seq = -1;
  78 static int hf_rx_serial = -1;
  79 static int hf_rx_callnumber = -1;
  80 static int hf_rx_type = -1;
  81 static int hf_rx_flags = -1;
  82 static int hf_rx_flags_clientinit = -1;
  83 static int hf_rx_flags_request_ack = -1;
  84 static int hf_rx_flags_last_packet = -1;
  85 static int hf_rx_flags_more_packets = -1;
  86 static int hf_rx_flags_free_packet = -1;
  87 static int hf_rx_userstatus = -1;
  88 static int hf_rx_securityindex = -1;
  89 static int hf_rx_spare = -1;
  90 static int hf_rx_serviceid = -1;
  91
  92 static gint ett_rx = -1;
  93 static gint ett_rx_flags = -1;
  94
  95 void
  96 dissect_rx(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
  97 {
  98         proto_tree      *rx_tree, *rx_tree_flags, *rx_flags, *ti;
  99         struct rx_header *rxh;
 100         int reply;
 101
 102         rxh = (struct rx_header *) &pd[offset];
 103
 104         /* get at least a full packet structure */
 105         if ( !BYTES_ARE_IN_FRAME(offset, sizeof(struct rx_header)) )
 106                 return;
 107
 108         if (check_col(fd, COL_PROTOCOL))
 109                 col_add_str(fd, COL_PROTOCOL, "RX");
 110
 111
 112         if (tree) {
 113                 ti = proto_tree_add_item_format(tree, proto_rx, offset,
 114                         sizeof(struct rx_header), NULL, "RX Protocol (%s)",
 115                         val_to_str(rxh->type,rx_types,"unknown (%d)"));
 116                 rx_tree = proto_item_add_subtree(ti, ett_rx);
 117
 118                 proto_tree_add_item(rx_tree, hf_rx_epoch,
 119                         offset, 4, pntohl(&rxh->epoch));
 120                 proto_tree_add_item(rx_tree, hf_rx_cid,
 121                         offset+4, 4, pntohl(&rxh->cid));
 122                 proto_tree_add_item(rx_tree, hf_rx_callnumber,
 123                         offset+8, 4, pntohl(&rxh->callNumber));
 124                 proto_tree_add_item(rx_tree, hf_rx_seq,
 125                         offset+12, 4, pntohl(&rxh->seq));
 126                 proto_tree_add_item(rx_tree, hf_rx_serial,
 127                         offset+16, 4, pntohl(&rxh->serial));
 128
 129                 proto_tree_add_item(rx_tree, hf_rx_type,
 130                         offset+20, 1, rxh->type);
 131
 132                 rx_flags = proto_tree_add_item(rx_tree, hf_rx_flags,
 133                         offset+21, 1, rxh->flags);
 134                 rx_tree_flags = proto_item_add_subtree(rx_flags, ett_rx_flags);
 135                 proto_tree_add_item(rx_tree_flags, hf_rx_flags_free_packet,
 136                         offset+21, 1, rxh->flags);
 137                 proto_tree_add_item(rx_tree_flags, hf_rx_flags_more_packets,
 138                         offset+21, 1, rxh->flags);
 139                 proto_tree_add_item(rx_tree_flags, hf_rx_flags_last_packet,
 140                         offset+21, 1, rxh->flags);
 141                 proto_tree_add_item(rx_tree_flags, hf_rx_flags_request_ack,
 142                         offset+21, 1, rxh->flags);
 143                 proto_tree_add_item(rx_tree_flags, hf_rx_flags_clientinit,
 144                         offset+21, 1, rxh->flags);
 145
 146                 proto_tree_add_item(rx_tree, hf_rx_userstatus,
 147                         offset+22, 1, rxh->userStatus);
 148                 proto_tree_add_item(rx_tree, hf_rx_securityindex,
 149                         offset+23, 1, rxh->securityIndex);
 150                 proto_tree_add_item(rx_tree, hf_rx_spare,
 151                         offset+24, 2, pntohs(&rxh->spare));
 152                 proto_tree_add_item(rx_tree, hf_rx_serviceid,
 153                         offset+26, 2, pntohs(&rxh->serviceId));
 154         }
 155
 156         if (check_col(fd, COL_INFO))
 157                 col_add_fstr(fd, COL_INFO,
 158                         "Type: %s  "
 159                         "Seq: %lu  "
 160                         "Call: %lu  "
 161                         "Source Port: %s  "
 162                         "Destination Port: %s  ",
 163                         val_to_str(rxh->type, rx_types, "%d"),
 164                         (unsigned long)pntohl(&rxh->seq),
 165                         (unsigned long)pntohl(&rxh->callNumber),
 166                         get_udp_port(pi.srcport),
 167                         get_udp_port(pi.destport)
 168                 );
 169
 170         reply = (rxh->flags & RX_CLIENT_INITIATED) == 0;
 171         if ( (rxh->type == RX_PACKET_TYPE_ABORT && reply) ||
 172                 rxh->type == RX_PACKET_TYPE_DATA )
 173         {
 174                 dissect_afs(pd,offset,fd,tree);
 175         }
 176 }
 177
 178 void
 179 proto_register_rx(void)
 180 {
 181         static hf_register_info hf[] = {
 182                 { &hf_rx_epoch, {
 183                         "Epoch", "rx.epoch", FT_UINT32, BASE_DEC,
 184                         NULL, 0, "Epoch" }},
 185                 { &hf_rx_cid, {
 186                         "CID", "rx.cid", FT_UINT32, BASE_DEC,
 187                         NULL, 0, "CID" }},
 188                 { &hf_rx_callnumber, {
 189                         "Call Number", "rx.callnumber", FT_UINT32, BASE_DEC,
 190                         NULL, 0, "Call Number" }},
 191                 { &hf_rx_seq, {
 192                         "Sequence Number", "rx.seq", FT_UINT32, BASE_DEC,
 193                         NULL, 0, "Sequence Number" }},
 194                 { &hf_rx_serial, {
 195                         "Serial", "rx.serial", FT_UINT32, BASE_DEC,
 196                         NULL, 0, "Serial" }},
 197                 { &hf_rx_type, {
 198                         "Type", "rx.type", FT_UINT8, BASE_DEC,
 199                         VALS(rx_types), 0, "Type" }},
 200                 { &hf_rx_flags, {
 201                         "Flags", "rx.flags", FT_UINT8, BASE_HEX,
 202                         NULL, 0, "Flags" }},
 203                 { &hf_rx_flags_clientinit, {
 204                         "Client Initiated", "rx.flags.client_init", FT_UINT8, BASE_BIN,
 205                         NULL, RX_CLIENT_INITIATED, "Client Initiated" }},
 206                 { &hf_rx_flags_request_ack, {
 207                         "Request Ack", "rx.flags.request_ack", FT_UINT8, BASE_BIN,
 208                         NULL, RX_REQUEST_ACK, "Request Ack" }},
 209                 { &hf_rx_flags_last_packet, {
 210                         "Last Packet", "rx.flags.last_packet", FT_UINT8, BASE_BIN,
 211                         NULL, RX_LAST_PACKET, "Last Packet" }},
 212                 { &hf_rx_flags_more_packets, {
 213                         "More Packets", "rx.flags.more_packets", FT_UINT8, BASE_BIN,
 214                         NULL, RX_MORE_PACKETS, "More Packets" }},
 215                 { &hf_rx_flags_free_packet, {
 216                         "Free Packet", "rx.flags.free_packet", FT_UINT8, BASE_BIN,
 217                         NULL, RX_FREE_PACKET, "Free Packet" }},
 218                 { &hf_rx_userstatus, {
 219                         "User Status", "rx.userstatus", FT_UINT32, BASE_DEC,
 220                         NULL, 0, "User Status" }},
 221                 { &hf_rx_securityindex, {
 222                         "Security Index", "rx.securityindex", FT_UINT32, BASE_DEC,
 223                         NULL, 0, "Security Index" }},
 224                 { &hf_rx_spare, {
 225                         "Spare/Checksum", "rx.spare", FT_UINT16, BASE_DEC,
 226                         NULL, 0, "Spare/Checksum" }},
 227                 { &hf_rx_serviceid, {
 228                         "Service ID", "rx.serviceid", FT_UINT16, BASE_DEC,
 229                         NULL, 0, "Service ID" }},
 230         };
 231         static gint *ett[] = {
 232                 &ett_rx,
 233                 &ett_rx_flags,
 234         };
 235
 236         proto_rx = proto_register_protocol("RX Protocol", "rx");
 237         proto_register_field_array(proto_rx, hf, array_length(hf));
 238         proto_register_subtree_array(ett, array_length(ett));
 239 }