epan/dissectors/packet-bjnp.c

   1 /* packet-bjnp.c
   2  * Routines for Canon BJNP packet disassembly.
   3  *
   4  * Copyright 2009, Stig Bjorlykke <stig@bjorlykke.org>
   5  *
   6  * $Id$
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "config.h"
  28
  29 #include <ctype.h>
  30
  31 #include <epan/packet.h>
  32 #include <epan/wmem/wmem.h>
  33
  34 #define PNAME  "Canon BJNP"
  35 #define PSNAME "BJNP"
  36 #define PFNAME "bjnp"
  37
  38 #define BJNP_PORT1         8611
  39 #define BJNP_PORT2         8612
  40 #define BJNP_PORT3         8613
  41 #define BJNP_PORT4         8614
  42
  43 /* dev_type */
  44 #define PRINTER_COMMAND    0x01
  45 #define SCANNER_COMMAND    0x02
  46 #define PRINTER_RESPONSE   0x81
  47 #define SCANNER_RESPONSE   0x82
  48
  49 /* cmd_code */
  50 #define CMD_DISCOVER       0x01
  51 #define CMD_PRINT_JOB_DET  0x10
  52 #define CMD_CLOSE          0x11
  53 #define CMD_GET_STATUS     0x20
  54 #define CMD_PRINT          0x21
  55 #define CMD_GET_ID         0x30
  56 #define CMD_SCAN_JOB       0x32
  57
  58 void proto_register_bjnp(void);
  59 void proto_reg_handoff_bjnp(void);
  60
  61 static int proto_bjnp = -1;
  62
  63 static int hf_bjnp_id = -1;
  64 static int hf_dev_type = -1;
  65 static int hf_cmd_code = -1;
  66 static int hf_seq_no = -1;
  67 static int hf_session_id = -1;
  68 static int hf_payload_len = -1;
  69 static int hf_payload = -1;
  70
  71 static gint ett_bjnp = -1;
  72
  73 static dissector_handle_t bjnp_handle;
  74
  75 static const value_string dev_type_vals[] = {
  76   { PRINTER_COMMAND,    "Printer Command"       },
  77   { SCANNER_COMMAND,    "Scanner Command"       },
  78   { PRINTER_RESPONSE,   "Printer Response"      },
  79   { SCANNER_RESPONSE,   "Scanner Response"      },
  80   { 0, NULL }
  81 };
  82
  83 static const value_string cmd_code_vals[] = {
  84   { CMD_DISCOVER,       "Discover"              },
  85   { CMD_PRINT_JOB_DET,  "Print Job Details"     },
  86   { CMD_CLOSE,          "Request Closure"       },
  87   { CMD_GET_STATUS,     "Get Printer Status"    },
  88   { CMD_PRINT,          "Print"                 },
  89   { CMD_GET_ID,         "Get Printer Identity"  },
  90   { CMD_SCAN_JOB,       "Scan Job Details"      },
  91   { 0, NULL }
  92 };
  93
  94 static int dissect_bjnp (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
  95 {
  96   proto_tree *bjnp_tree;
  97   proto_item *ti;
  98   gint        offset = 0;
  99   guint32     payload_len;
 100   guint8      dev_type, cmd_code;
 101   gchar      *info;
 102
 103   /* If it does not start with a printable character it's not BJNP */
 104   if(!isprint(tvb_get_guint8(tvb, 0)))
 105     return 0;
 106
 107   col_set_str (pinfo->cinfo, COL_PROTOCOL, PSNAME);
 108   col_clear (pinfo->cinfo, COL_INFO);
 109
 110   ti = proto_tree_add_item (tree, proto_bjnp, tvb, offset, -1, ENC_NA);
 111   bjnp_tree = proto_item_add_subtree (ti, ett_bjnp);
 112
 113   proto_tree_add_item (bjnp_tree, hf_bjnp_id, tvb, offset, 4, ENC_ASCII|ENC_NA);
 114   offset += 4;
 115
 116   dev_type = tvb_get_guint8 (tvb, offset);
 117   proto_tree_add_item (bjnp_tree, hf_dev_type, tvb, offset, 1, ENC_BIG_ENDIAN);
 118   offset++;
 119
 120   cmd_code = tvb_get_guint8 (tvb, offset);
 121   proto_tree_add_item (bjnp_tree, hf_cmd_code, tvb, offset, 1, ENC_BIG_ENDIAN);
 122   offset++;
 123
 124   info = wmem_strdup_printf(wmem_packet_scope(), "%s: %s",
 125                             val_to_str (dev_type, dev_type_vals, "Unknown type (%d)"),
 126                             val_to_str (cmd_code, cmd_code_vals, "Unknown code (%d)"));
 127
 128   proto_item_append_text (ti, ", %s", info);
 129   col_add_str (pinfo->cinfo, COL_INFO, info);
 130
 131   proto_tree_add_item (bjnp_tree, hf_seq_no, tvb, offset, 4, ENC_BIG_ENDIAN);
 132   offset += 4;
 133
 134   proto_tree_add_item (bjnp_tree, hf_session_id, tvb, offset, 2, ENC_BIG_ENDIAN);
 135   offset += 2;
 136
 137   payload_len = tvb_get_ntohl (tvb, offset);
 138   proto_tree_add_item (bjnp_tree, hf_payload_len, tvb, offset, 4, ENC_BIG_ENDIAN);
 139   offset += 4;
 140
 141   if (payload_len > 0) {
 142     /* TBD: Dissect various commands */
 143     proto_tree_add_item (bjnp_tree, hf_payload, tvb, offset, payload_len, ENC_NA);
 144     offset += payload_len;
 145   }
 146   return offset;
 147 }
 148
 149 void proto_register_bjnp (void)
 150 {
 151   static hf_register_info hf[] = {
 152     { &hf_bjnp_id,
 153       { "Id", "bjnp.id", FT_STRING, BASE_NONE,
 154         NULL, 0x0, NULL, HFILL } },
 155     { &hf_dev_type,
 156       { "Type", "bjnp.type", FT_UINT8, BASE_DEC,
 157         VALS(dev_type_vals), 0x0, NULL, HFILL } },
 158     { &hf_cmd_code,
 159       { "Code", "bjnp.code", FT_UINT8, BASE_DEC,
 160         VALS(cmd_code_vals), 0x0, NULL, HFILL } },
 161     { &hf_seq_no,
 162       { "Sequence Number", "bjnp.seq_no", FT_UINT32, BASE_DEC,
 163         NULL, 0x0, NULL, HFILL } },
 164     { &hf_session_id,
 165       { "Session Id", "bjnp.session_id", FT_UINT16, BASE_DEC,
 166         NULL, 0x0, NULL, HFILL } },
 167     { &hf_payload_len,
 168       { "Payload Length", "bjnp.payload_len", FT_UINT32, BASE_DEC,
 169         NULL, 0x0, NULL, HFILL } },
 170     { &hf_payload,
 171       { "Payload", "bjnp.payload", FT_BYTES, BASE_NONE,
 172         NULL, 0x0, NULL, HFILL } },
 173   };
 174
 175   static gint *ett[] = {
 176     &ett_bjnp
 177   };
 178
 179   proto_bjnp = proto_register_protocol (PNAME, PSNAME, PFNAME);
 180
 181   bjnp_handle = new_register_dissector (PFNAME, dissect_bjnp, proto_bjnp);
 182
 183   proto_register_field_array (proto_bjnp, hf, array_length (hf));
 184   proto_register_subtree_array (ett, array_length (ett));
 185 }
 186
 187 void proto_reg_handoff_bjnp (void)
 188 {
 189   dissector_add_uint ("udp.port", BJNP_PORT1, bjnp_handle);
 190   dissector_add_uint ("udp.port", BJNP_PORT2, bjnp_handle);
 191   dissector_add_uint ("udp.port", BJNP_PORT3, bjnp_handle);
 192   dissector_add_uint ("udp.port", BJNP_PORT4, bjnp_handle);
 193 }
 194
 195 /*
 196  * Editor modelines
 197  *
 198  * Local Variables:
 199  * c-basic-offset: 2
 200  * tab-width: 8
 201  * indent-tabs-mode: nil
 202  * End:
 203  *
 204  * ex: set shiftwidth=2 tabstop=8 expandtab:
 205  * :indentSize=2:tabSize=8:noTabs=true:
 206  */