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 1.18 2001/01/09 06:31:41 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 "packet-afs.h"
  49 #include "resolv.h"
  50
  51 #define UDP_PORT_RX_LOW         7000
  52 #define UDP_PORT_RX_HIGH        7009
  53 #define UDP_PORT_RX_AFS_BACKUPS 7021
  54
  55 static const value_string rx_types[] = {
  56         { RX_PACKET_TYPE_DATA,          "data" },
  57         { RX_PACKET_TYPE_ACK,           "ack" },
  58         { RX_PACKET_TYPE_BUSY,          "busy" },
  59         { RX_PACKET_TYPE_ABORT,         "abort" },
  60         { RX_PACKET_TYPE_ACKALL,        "ackall" },
  61         { RX_PACKET_TYPE_CHALLENGE,     "challenge" },
  62         { RX_PACKET_TYPE_RESPONSE,      "response" },
  63         { RX_PACKET_TYPE_DEBUG,         "debug" },
  64         { RX_PACKET_TYPE_PARAMS,        "params" },
  65         { RX_PACKET_TYPE_VERSION,       "version" },
  66         { 0,                            NULL },
  67 };
  68
  69 static const value_string rx_flags[] = {
  70         { RX_CLIENT_INITIATED,  "client-init" },
  71         { RX_REQUEST_ACK,       "req-ack" },
  72         { RX_LAST_PACKET,       "last-pckt" },
  73         { RX_MORE_PACKETS,      "more-pckts" },
  74         { RX_FREE_PACKET,       "free-pckt" },
  75         { 0,                    NULL }
  76 };
  77
  78 static int proto_rx = -1;
  79
  80 static int hf_rx_epoch = -1;
  81 static int hf_rx_cid = -1;
  82 static int hf_rx_seq = -1;
  83 static int hf_rx_serial = -1;
  84 static int hf_rx_callnumber = -1;
  85 static int hf_rx_type = -1;
  86 static int hf_rx_flags = -1;
  87 static int hf_rx_flags_clientinit = -1;
  88 static int hf_rx_flags_request_ack = -1;
  89 static int hf_rx_flags_last_packet = -1;
  90 static int hf_rx_flags_more_packets = -1;
  91 static int hf_rx_flags_free_packet = -1;
  92 static int hf_rx_userstatus = -1;
  93 static int hf_rx_securityindex = -1;
  94 static int hf_rx_spare = -1;
  95 static int hf_rx_serviceid = -1;
  96
  97 static gint ett_rx = -1;
  98 static gint ett_rx_flags = -1;
  99
 100 static void
 101 dissect_rx(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
 102 {
 103         proto_tree      *rx_tree, *rx_tree_flags, *rx_flags, *ti;
 104         struct rx_header *rxh;
 105         int reply;
 106
 107         OLD_CHECK_DISPLAY_AS_DATA(proto_rx, pd, offset, fd, tree);
 108
 109         rxh = (struct rx_header *) &pd[offset];
 110
 111         /* get at least a full packet structure */
 112         if ( !BYTES_ARE_IN_FRAME(offset, sizeof(struct rx_header)) )
 113                 return;
 114
 115         if (check_col(fd, COL_PROTOCOL))
 116                 col_set_str(fd, COL_PROTOCOL, "RX");
 117
 118
 119         if (tree) {
 120                 ti = proto_tree_add_protocol_format(tree, proto_rx, NullTVB, offset,
 121                         sizeof(struct rx_header), "RX Protocol (%s)",
 122                         val_to_str(rxh->type,rx_types,"unknown (%d)"));
 123                 rx_tree = proto_item_add_subtree(ti, ett_rx);
 124
 125                 proto_tree_add_uint(rx_tree, hf_rx_epoch, NullTVB,
 126                         offset, 4, pntohl(&rxh->epoch));
 127                 proto_tree_add_uint(rx_tree, hf_rx_cid, NullTVB,
 128                         offset+4, 4, pntohl(&rxh->cid));
 129                 proto_tree_add_uint(rx_tree, hf_rx_callnumber, NullTVB,
 130                         offset+8, 4, pntohl(&rxh->callNumber));
 131                 proto_tree_add_uint(rx_tree, hf_rx_seq, NullTVB,
 132                         offset+12, 4, pntohl(&rxh->seq));
 133                 proto_tree_add_uint(rx_tree, hf_rx_serial, NullTVB,
 134                         offset+16, 4, pntohl(&rxh->serial));
 135
 136                 proto_tree_add_uint(rx_tree, hf_rx_type, NullTVB,
 137                         offset+20, 1, rxh->type);
 138
 139                 rx_flags = proto_tree_add_uint(rx_tree, hf_rx_flags, NullTVB,
 140                         offset+21, 1, rxh->flags);
 141                 rx_tree_flags = proto_item_add_subtree(rx_flags, ett_rx_flags);
 142                 proto_tree_add_uint(rx_tree_flags, hf_rx_flags_free_packet, NullTVB,
 143                         offset+21, 1, rxh->flags);
 144                 proto_tree_add_uint(rx_tree_flags, hf_rx_flags_more_packets, NullTVB,
 145                         offset+21, 1, rxh->flags);
 146                 proto_tree_add_uint(rx_tree_flags, hf_rx_flags_last_packet, NullTVB,
 147                         offset+21, 1, rxh->flags);
 148                 proto_tree_add_uint(rx_tree_flags, hf_rx_flags_request_ack, NullTVB,
 149                         offset+21, 1, rxh->flags);
 150                 proto_tree_add_uint(rx_tree_flags, hf_rx_flags_clientinit, NullTVB,
 151                         offset+21, 1, rxh->flags);
 152
 153                 proto_tree_add_uint(rx_tree, hf_rx_userstatus, NullTVB,
 154                         offset+22, 1, rxh->userStatus);
 155                 proto_tree_add_uint(rx_tree, hf_rx_securityindex, NullTVB,
 156                         offset+23, 1, rxh->securityIndex);
 157                 proto_tree_add_uint(rx_tree, hf_rx_spare, NullTVB,
 158                         offset+24, 2, pntohs(&rxh->spare));
 159                 proto_tree_add_uint(rx_tree, hf_rx_serviceid, NullTVB,
 160                         offset+26, 2, pntohs(&rxh->serviceId));
 161         }
 162
 163         if (check_col(fd, COL_INFO))
 164                 col_add_fstr(fd, COL_INFO,
 165                         "Type: %s  "
 166                         "Seq: %lu  "
 167                         "Call: %lu  "
 168                         "Source Port: %s  "
 169                         "Destination Port: %s  ",
 170                         val_to_str(rxh->type, rx_types, "%d"),
 171                         (unsigned long)pntohl(&rxh->seq),
 172                         (unsigned long)pntohl(&rxh->callNumber),
 173                         get_udp_port(pi.srcport),
 174                         get_udp_port(pi.destport)
 175                 );
 176
 177         reply = (rxh->flags & RX_CLIENT_INITIATED) == 0;
 178         if ( (rxh->type == RX_PACKET_TYPE_ABORT && reply) ||
 179                 rxh->type == RX_PACKET_TYPE_DATA )
 180         {
 181                 dissect_afs(pd,offset,fd,tree);
 182         }
 183 }
 184
 185 void
 186 proto_register_rx(void)
 187 {
 188         static hf_register_info hf[] = {
 189                 { &hf_rx_epoch, {
 190                         "Epoch", "rx.epoch", FT_UINT32, BASE_DEC,
 191                         NULL, 0, "Epoch" }},
 192                 { &hf_rx_cid, {
 193                         "CID", "rx.cid", FT_UINT32, BASE_DEC,
 194                         NULL, 0, "CID" }},
 195                 { &hf_rx_callnumber, {
 196                         "Call Number", "rx.callnumber", FT_UINT32, BASE_DEC,
 197                         NULL, 0, "Call Number" }},
 198                 { &hf_rx_seq, {
 199                         "Sequence Number", "rx.seq", FT_UINT32, BASE_DEC,
 200                         NULL, 0, "Sequence Number" }},
 201                 { &hf_rx_serial, {
 202                         "Serial", "rx.serial", FT_UINT32, BASE_DEC,
 203                         NULL, 0, "Serial" }},
 204                 { &hf_rx_type, {
 205                         "Type", "rx.type", FT_UINT8, BASE_DEC,
 206                         VALS(rx_types), 0, "Type" }},
 207                 { &hf_rx_flags, {
 208                         "Flags", "rx.flags", FT_UINT8, BASE_HEX,
 209                         NULL, 0, "Flags" }},
 210                 { &hf_rx_flags_clientinit, {
 211                         "Client Initiated", "rx.flags.client_init", FT_UINT8, BASE_BIN,
 212                         NULL, RX_CLIENT_INITIATED, "Client Initiated" }},
 213                 { &hf_rx_flags_request_ack, {
 214                         "Request Ack", "rx.flags.request_ack", FT_UINT8, BASE_BIN,
 215                         NULL, RX_REQUEST_ACK, "Request Ack" }},
 216                 { &hf_rx_flags_last_packet, {
 217                         "Last Packet", "rx.flags.last_packet", FT_UINT8, BASE_BIN,
 218                         NULL, RX_LAST_PACKET, "Last Packet" }},
 219                 { &hf_rx_flags_more_packets, {
 220                         "More Packets", "rx.flags.more_packets", FT_UINT8, BASE_BIN,
 221                         NULL, RX_MORE_PACKETS, "More Packets" }},
 222                 { &hf_rx_flags_free_packet, {
 223                         "Free Packet", "rx.flags.free_packet", FT_UINT8, BASE_BIN,
 224                         NULL, RX_FREE_PACKET, "Free Packet" }},
 225                 { &hf_rx_userstatus, {
 226                         "User Status", "rx.userstatus", FT_UINT32, BASE_DEC,
 227                         NULL, 0, "User Status" }},
 228                 { &hf_rx_securityindex, {
 229                         "Security Index", "rx.securityindex", FT_UINT32, BASE_DEC,
 230                         NULL, 0, "Security Index" }},
 231                 { &hf_rx_spare, {
 232                         "Spare/Checksum", "rx.spare", FT_UINT16, BASE_DEC,
 233                         NULL, 0, "Spare/Checksum" }},
 234                 { &hf_rx_serviceid, {
 235                         "Service ID", "rx.serviceid", FT_UINT16, BASE_DEC,
 236                         NULL, 0, "Service ID" }},
 237         };
 238         static gint *ett[] = {
 239                 &ett_rx,
 240                 &ett_rx_flags,
 241         };
 242
 243         proto_rx = proto_register_protocol("RX Protocol", "RX", "rx");
 244         proto_register_field_array(proto_rx, hf, array_length(hf));
 245         proto_register_subtree_array(ett, array_length(ett));
 246 }
 247
 248 void
 249 proto_reg_handoff_rx(void)
 250 {
 251         int port;
 252
 253         /* Ports in the range UDP_PORT_RX_LOW to UDP_PORT_RX_HIGH
 254            are all used for various AFS services. */
 255         for (port = UDP_PORT_RX_LOW; port <= UDP_PORT_RX_HIGH; port++)
 256                 old_dissector_add("udp.port", port, dissect_rx, proto_rx);
 257         old_dissector_add("udp.port", UDP_PORT_RX_AFS_BACKUPS, dissect_rx,
 258             proto_rx);
 259 }