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 1.7 2000/01/14 19:11:26 guy 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 "resolv.h"
  49
  50 static const value_string rx_types[] = {
  51         { RX_PACKET_TYPE_DATA,          "data" },
  52         { RX_PACKET_TYPE_ACK,           "ack" },
  53         { RX_PACKET_TYPE_BUSY,          "busy" },
  54         { RX_PACKET_TYPE_ABORT,         "abort" },
  55         { RX_PACKET_TYPE_ACKALL,        "ackall" },
  56         { RX_PACKET_TYPE_CHALLENGE,     "challenge" },
  57         { RX_PACKET_TYPE_RESPONSE,      "response" },
  58         { RX_PACKET_TYPE_DEBUG,         "debug" },
  59         { RX_PACKET_TYPE_PARAMS,        "params" },
  60         { RX_PACKET_TYPE_VERSION,       "version" },
  61         { 0,                            NULL },
  62 };
  63
  64 static const value_string rx_flags[] = {
  65         { RX_CLIENT_INITIATED,  "client-init" },
  66         { RX_REQUEST_ACK,       "req-ack" },
  67         { RX_LAST_PACKET,       "last-pckt" },
  68         { RX_MORE_PACKETS,      "more-pckts" },
  69         { RX_FREE_PACKET,       "free-pckt" }
  70 };
  71
  72 static int proto_rx = -1;
  73
  74 static int hf_rx_epoch = -1;
  75 static int hf_rx_cid = -1;
  76 static int hf_rx_seq = -1;
  77 static int hf_rx_serial = -1;
  78 static int hf_rx_callnumber = -1;
  79 static int hf_rx_type = -1;
  80 static int hf_rx_flags = -1;
  81 static int hf_rx_flags_clientinit = -1;
  82 static int hf_rx_flags_request_ack = -1;
  83 static int hf_rx_flags_last_packet = -1;
  84 static int hf_rx_flags_more_packets = -1;
  85 static int hf_rx_flags_free_packet = -1;
  86 static int hf_rx_userstatus = -1;
  87 static int hf_rx_securityindex = -1;
  88 static int hf_rx_spare = -1;
  89 static int hf_rx_serviceid = -1;
  90
  91 static gint ett_rx = -1;
  92 static gint ett_rx_flags = -1;
  93
  94 void
  95 dissect_rx(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
  96 {
  97         proto_tree      *rx_tree, *rx_tree_flags, *rx_flags, *ti;
  98         struct rx_header *rxh;
  99         int reply;
 100
 101         rxh = (struct rx_header *) &pd[offset];
 102
 103         /* get at least a full packet structure */
 104         if ( !BYTES_ARE_IN_FRAME(offset, sizeof(struct rx_header)) )
 105                 return;
 106
 107         if (check_col(fd, COL_PROTOCOL))
 108                 col_add_str(fd, COL_PROTOCOL, "RX");
 109
 110
 111         if (tree) {
 112                 ti = proto_tree_add_item_format(tree, proto_rx, offset,
 113                         sizeof(struct rx_header), NULL, "RX Protocol (%s)",
 114                         val_to_str(rxh->type,rx_types,"unknown (%d)"));
 115                 rx_tree = proto_item_add_subtree(ti, ett_rx);
 116
 117                 proto_tree_add_item(rx_tree, hf_rx_epoch,
 118                         offset, 4, pntohl(&rxh->epoch));
 119                 proto_tree_add_item(rx_tree, hf_rx_cid,
 120                         offset+4, 4, pntohl(&rxh->cid));
 121                 proto_tree_add_item(rx_tree, hf_rx_callnumber,
 122                         offset+8, 4, pntohl(&rxh->callNumber));
 123                 proto_tree_add_item(rx_tree, hf_rx_seq,
 124                         offset+12, 4, pntohl(&rxh->seq));
 125                 proto_tree_add_item(rx_tree, hf_rx_serial,
 126                         offset+16, 4, pntohl(&rxh->serial));
 127
 128                 proto_tree_add_item(rx_tree, hf_rx_type,
 129                         offset+20, 1, rxh->type);
 130
 131                 rx_flags = proto_tree_add_item(rx_tree, hf_rx_flags,
 132                         offset+21, 1, rxh->flags);
 133                 rx_tree_flags = proto_item_add_subtree(rx_flags, ett_rx_flags);
 134                 proto_tree_add_item(rx_tree_flags, hf_rx_flags_free_packet,
 135                         offset+21, 1, rxh->flags);
 136                 proto_tree_add_item(rx_tree_flags, hf_rx_flags_more_packets,
 137                         offset+21, 1, rxh->flags);
 138                 proto_tree_add_item(rx_tree_flags, hf_rx_flags_last_packet,
 139                         offset+21, 1, rxh->flags);
 140                 proto_tree_add_item(rx_tree_flags, hf_rx_flags_request_ack,
 141                         offset+21, 1, rxh->flags);
 142                 proto_tree_add_item(rx_tree_flags, hf_rx_flags_clientinit,
 143                         offset+21, 1, rxh->flags);
 144
 145                 proto_tree_add_item(rx_tree, hf_rx_userstatus,
 146                         offset+22, 1, rxh->userStatus);
 147                 proto_tree_add_item(rx_tree, hf_rx_securityindex,
 148                         offset+23, 1, rxh->securityIndex);
 149                 proto_tree_add_item(rx_tree, hf_rx_spare,
 150                         offset+24, 2, pntohs(&rxh->spare));
 151                 proto_tree_add_item(rx_tree, hf_rx_serviceid,
 152                         offset+26, 2, pntohs(&rxh->serviceId));
 153         }
 154
 155         if (check_col(fd, COL_INFO))
 156                 col_add_fstr(fd, COL_INFO,
 157                         "Type: %s  "
 158                         "Seq: %lu  "
 159                         "Call: %lu  "
 160                         "Source Port: %s  "
 161                         "Destination Port: %s  ",
 162                         val_to_str(rxh->type, rx_types, "%d"),
 163                         (unsigned long)pntohl(&rxh->seq),
 164                         (unsigned long)pntohl(&rxh->callNumber),
 165                         get_udp_port(pi.srcport),
 166                         get_udp_port(pi.destport)
 167                 );
 168
 169         reply = (rxh->flags & RX_CLIENT_INITIATED) == 0;
 170         if ( (rxh->type == RX_PACKET_TYPE_ABORT && reply) ||
 171                 rxh->type == RX_PACKET_TYPE_DATA )
 172         {
 173                 dissect_afs(pd,offset,fd,tree);
 174         }
 175 }
 176
 177 void
 178 proto_register_rx(void)
 179 {
 180         static hf_register_info hf[] = {
 181                 { &hf_rx_epoch, {
 182                         "Epoch", "rx.epoch", FT_UINT32, BASE_DEC,
 183                         NULL, 0, "Epoch" }},
 184                 { &hf_rx_cid, {
 185                         "CID", "rx.cid", FT_UINT32, BASE_DEC,
 186                         NULL, 0, "CID" }},
 187                 { &hf_rx_callnumber, {
 188                         "Call Number", "rx.callnumber", FT_UINT32, BASE_DEC,
 189                         NULL, 0, "Call Number" }},
 190                 { &hf_rx_seq, {
 191                         "Sequence Number", "rx.seq", FT_UINT32, BASE_DEC,
 192                         NULL, 0, "Sequence Number" }},
 193                 { &hf_rx_serial, {
 194                         "Serial", "rx.serial", FT_UINT32, BASE_DEC,
 195                         NULL, 0, "Serial" }},
 196                 { &hf_rx_type, {
 197                         "Type", "rx.type", FT_UINT8, BASE_DEC,
 198                         VALS(rx_types), 0, "Type" }},
 199                 { &hf_rx_flags, {
 200                         "Flags", "rx.flags", FT_UINT8, BASE_HEX,
 201                         NULL, 0, "Flags" }},
 202                 { &hf_rx_flags_clientinit, {
 203                         "Client Initiated", "rx.flags.client_init", FT_UINT8, BASE_BIN,
 204                         NULL, RX_CLIENT_INITIATED, "Client Initiated" }},
 205                 { &hf_rx_flags_request_ack, {
 206                         "Request Ack", "rx.flags.request_ack", FT_UINT8, BASE_BIN,
 207                         NULL, RX_REQUEST_ACK, "Request Ack" }},
 208                 { &hf_rx_flags_last_packet, {
 209                         "Last Packet", "rx.flags.last_packet", FT_UINT8, BASE_BIN,
 210                         NULL, RX_LAST_PACKET, "Last Packet" }},
 211                 { &hf_rx_flags_more_packets, {
 212                         "More Packets", "rx.flags.more_packets", FT_UINT8, BASE_BIN,
 213                         NULL, RX_MORE_PACKETS, "More Packets" }},
 214                 { &hf_rx_flags_free_packet, {
 215                         "Free Packet", "rx.flags.free_packet", FT_UINT8, BASE_BIN,
 216                         NULL, RX_FREE_PACKET, "Free Packet" }},
 217                 { &hf_rx_userstatus, {
 218                         "User Status", "rx.userstatus", FT_UINT32, BASE_DEC,
 219                         NULL, 0, "User Status" }},
 220                 { &hf_rx_securityindex, {
 221                         "Security Index", "rx.securityindex", FT_UINT32, BASE_DEC,
 222                         NULL, 0, "Security Index" }},
 223                 { &hf_rx_spare, {
 224                         "Spare/Checksum", "rx.spare", FT_UINT16, BASE_DEC,
 225                         NULL, 0, "Spare/Checksum" }},
 226                 { &hf_rx_serviceid, {
 227                         "Service ID", "rx.serviceid", FT_UINT16, BASE_DEC,
 228                         NULL, 0, "Service ID" }},
 229         };
 230         static gint *ett[] = {
 231                 &ett_rx,
 232                 &ett_rx_flags,
 233         };
 234
 235         proto_rx = proto_register_protocol("RX Protocol", "rx");
 236         proto_register_field_array(proto_rx, hf, array_length(hf));
 237         proto_register_subtree_array(ett, array_length(ett));
 238 }