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 1.12 2000/05/31 05:07:38 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 };
  76
  77 static int proto_rx = -1;
  78
  79 static int hf_rx_epoch = -1;
  80 static int hf_rx_cid = -1;
  81 static int hf_rx_seq = -1;
  82 static int hf_rx_serial = -1;
  83 static int hf_rx_callnumber = -1;
  84 static int hf_rx_type = -1;
  85 static int hf_rx_flags = -1;
  86 static int hf_rx_flags_clientinit = -1;
  87 static int hf_rx_flags_request_ack = -1;
  88 static int hf_rx_flags_last_packet = -1;
  89 static int hf_rx_flags_more_packets = -1;
  90 static int hf_rx_flags_free_packet = -1;
  91 static int hf_rx_userstatus = -1;
  92 static int hf_rx_securityindex = -1;
  93 static int hf_rx_spare = -1;
  94 static int hf_rx_serviceid = -1;
  95
  96 static gint ett_rx = -1;
  97 static gint ett_rx_flags = -1;
  98
  99 static void
 100 dissect_rx(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
 101 {
 102         proto_tree      *rx_tree, *rx_tree_flags, *rx_flags, *ti;
 103         struct rx_header *rxh;
 104         int reply;
 105
 106         rxh = (struct rx_header *) &pd[offset];
 107
 108         /* get at least a full packet structure */
 109         if ( !BYTES_ARE_IN_FRAME(offset, sizeof(struct rx_header)) )
 110                 return;
 111
 112         if (check_col(fd, COL_PROTOCOL))
 113                 col_add_str(fd, COL_PROTOCOL, "RX");
 114
 115
 116         if (tree) {
 117                 ti = proto_tree_add_protocol_format(tree, proto_rx, NullTVB, offset,
 118                         sizeof(struct rx_header), "RX Protocol (%s)",
 119                         val_to_str(rxh->type,rx_types,"unknown (%d)"));
 120                 rx_tree = proto_item_add_subtree(ti, ett_rx);
 121
 122                 proto_tree_add_uint(rx_tree, hf_rx_epoch, NullTVB,
 123                         offset, 4, pntohl(&rxh->epoch));
 124                 proto_tree_add_uint(rx_tree, hf_rx_cid, NullTVB,
 125                         offset+4, 4, pntohl(&rxh->cid));
 126                 proto_tree_add_uint(rx_tree, hf_rx_callnumber, NullTVB,
 127                         offset+8, 4, pntohl(&rxh->callNumber));
 128                 proto_tree_add_uint(rx_tree, hf_rx_seq, NullTVB,
 129                         offset+12, 4, pntohl(&rxh->seq));
 130                 proto_tree_add_uint(rx_tree, hf_rx_serial, NullTVB,
 131                         offset+16, 4, pntohl(&rxh->serial));
 132
 133                 proto_tree_add_uint(rx_tree, hf_rx_type, NullTVB,
 134                         offset+20, 1, rxh->type);
 135
 136                 rx_flags = proto_tree_add_uint(rx_tree, hf_rx_flags, NullTVB,
 137                         offset+21, 1, rxh->flags);
 138                 rx_tree_flags = proto_item_add_subtree(rx_flags, ett_rx_flags);
 139                 proto_tree_add_uint(rx_tree_flags, hf_rx_flags_free_packet, NullTVB,
 140                         offset+21, 1, rxh->flags);
 141                 proto_tree_add_uint(rx_tree_flags, hf_rx_flags_more_packets, NullTVB,
 142                         offset+21, 1, rxh->flags);
 143                 proto_tree_add_uint(rx_tree_flags, hf_rx_flags_last_packet, NullTVB,
 144                         offset+21, 1, rxh->flags);
 145                 proto_tree_add_uint(rx_tree_flags, hf_rx_flags_request_ack, NullTVB,
 146                         offset+21, 1, rxh->flags);
 147                 proto_tree_add_uint(rx_tree_flags, hf_rx_flags_clientinit, NullTVB,
 148                         offset+21, 1, rxh->flags);
 149
 150                 proto_tree_add_uint(rx_tree, hf_rx_userstatus, NullTVB,
 151                         offset+22, 1, rxh->userStatus);
 152                 proto_tree_add_uint(rx_tree, hf_rx_securityindex, NullTVB,
 153                         offset+23, 1, rxh->securityIndex);
 154                 proto_tree_add_uint(rx_tree, hf_rx_spare, NullTVB,
 155                         offset+24, 2, pntohs(&rxh->spare));
 156                 proto_tree_add_uint(rx_tree, hf_rx_serviceid, NullTVB,
 157                         offset+26, 2, pntohs(&rxh->serviceId));
 158         }
 159
 160         if (check_col(fd, COL_INFO))
 161                 col_add_fstr(fd, COL_INFO,
 162                         "Type: %s  "
 163                         "Seq: %lu  "
 164                         "Call: %lu  "
 165                         "Source Port: %s  "
 166                         "Destination Port: %s  ",
 167                         val_to_str(rxh->type, rx_types, "%d"),
 168                         (unsigned long)pntohl(&rxh->seq),
 169                         (unsigned long)pntohl(&rxh->callNumber),
 170                         get_udp_port(pi.srcport),
 171                         get_udp_port(pi.destport)
 172                 );
 173
 174         reply = (rxh->flags & RX_CLIENT_INITIATED) == 0;
 175         if ( (rxh->type == RX_PACKET_TYPE_ABORT && reply) ||
 176                 rxh->type == RX_PACKET_TYPE_DATA )
 177         {
 178                 dissect_afs(pd,offset,fd,tree);
 179         }
 180 }
 181
 182 void
 183 proto_register_rx(void)
 184 {
 185         static hf_register_info hf[] = {
 186                 { &hf_rx_epoch, {
 187                         "Epoch", "rx.epoch", FT_UINT32, BASE_DEC,
 188                         NULL, 0, "Epoch" }},
 189                 { &hf_rx_cid, {
 190                         "CID", "rx.cid", FT_UINT32, BASE_DEC,
 191                         NULL, 0, "CID" }},
 192                 { &hf_rx_callnumber, {
 193                         "Call Number", "rx.callnumber", FT_UINT32, BASE_DEC,
 194                         NULL, 0, "Call Number" }},
 195                 { &hf_rx_seq, {
 196                         "Sequence Number", "rx.seq", FT_UINT32, BASE_DEC,
 197                         NULL, 0, "Sequence Number" }},
 198                 { &hf_rx_serial, {
 199                         "Serial", "rx.serial", FT_UINT32, BASE_DEC,
 200                         NULL, 0, "Serial" }},
 201                 { &hf_rx_type, {
 202                         "Type", "rx.type", FT_UINT8, BASE_DEC,
 203                         VALS(rx_types), 0, "Type" }},
 204                 { &hf_rx_flags, {
 205                         "Flags", "rx.flags", FT_UINT8, BASE_HEX,
 206                         NULL, 0, "Flags" }},
 207                 { &hf_rx_flags_clientinit, {
 208                         "Client Initiated", "rx.flags.client_init", FT_UINT8, BASE_BIN,
 209                         NULL, RX_CLIENT_INITIATED, "Client Initiated" }},
 210                 { &hf_rx_flags_request_ack, {
 211                         "Request Ack", "rx.flags.request_ack", FT_UINT8, BASE_BIN,
 212                         NULL, RX_REQUEST_ACK, "Request Ack" }},
 213                 { &hf_rx_flags_last_packet, {
 214                         "Last Packet", "rx.flags.last_packet", FT_UINT8, BASE_BIN,
 215                         NULL, RX_LAST_PACKET, "Last Packet" }},
 216                 { &hf_rx_flags_more_packets, {
 217                         "More Packets", "rx.flags.more_packets", FT_UINT8, BASE_BIN,
 218                         NULL, RX_MORE_PACKETS, "More Packets" }},
 219                 { &hf_rx_flags_free_packet, {
 220                         "Free Packet", "rx.flags.free_packet", FT_UINT8, BASE_BIN,
 221                         NULL, RX_FREE_PACKET, "Free Packet" }},
 222                 { &hf_rx_userstatus, {
 223                         "User Status", "rx.userstatus", FT_UINT32, BASE_DEC,
 224                         NULL, 0, "User Status" }},
 225                 { &hf_rx_securityindex, {
 226                         "Security Index", "rx.securityindex", FT_UINT32, BASE_DEC,
 227                         NULL, 0, "Security Index" }},
 228                 { &hf_rx_spare, {
 229                         "Spare/Checksum", "rx.spare", FT_UINT16, BASE_DEC,
 230                         NULL, 0, "Spare/Checksum" }},
 231                 { &hf_rx_serviceid, {
 232                         "Service ID", "rx.serviceid", FT_UINT16, BASE_DEC,
 233                         NULL, 0, "Service ID" }},
 234         };
 235         static gint *ett[] = {
 236                 &ett_rx,
 237                 &ett_rx_flags,
 238         };
 239
 240         proto_rx = proto_register_protocol("RX Protocol", "rx");
 241         proto_register_field_array(proto_rx, hf, array_length(hf));
 242         proto_register_subtree_array(ett, array_length(ett));
 243 }
 244
 245 void
 246 proto_reg_handoff_rx(void)
 247 {
 248         int port;
 249
 250         /* Ports in the range UDP_PORT_RX_LOW to UDP_PORT_RX_HIGH
 251            are all used for various AFS services. */
 252         for (port = UDP_PORT_RX_LOW; port <= UDP_PORT_RX_HIGH; port++)
 253                 dissector_add("udp.port", port, dissect_rx);
 254         dissector_add("udp.port", UDP_PORT_RX_AFS_BACKUPS, dissect_rx);
 255 }