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/* packet-bjnp.c
* Routines for Canon BJNP packet disassembly.
*
* Copyright 2009, Stig Bjorlykke <stig@bjorlykke.org>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#define PNAME "Canon BJNP"
#define PSNAME "BJNP"
#define PFNAME "bjnp"
#define BJNP_PORT_RANGE "8611-8614"
/* dev_type */
#define PRINTER_COMMAND 0x01
#define SCANNER_COMMAND 0x02
#define PRINTER_RESPONSE 0x81
#define SCANNER_RESPONSE 0x82
/* cmd_code */
#define CMD_DISCOVER 0x01
#define CMD_PRINT_JOB_DET 0x10
#define CMD_CLOSE 0x11
#define CMD_GET_STATUS 0x20
#define CMD_PRINT 0x21
#define CMD_GET_ID 0x30
#define CMD_SCAN_JOB 0x32
void proto_register_bjnp(void);
void proto_reg_handoff_bjnp(void);
static int proto_bjnp = -1;
static int hf_bjnp_id = -1;
static int hf_dev_type = -1;
static int hf_cmd_code = -1;
static int hf_seq_no = -1;
static int hf_session_id = -1;
static int hf_payload_len = -1;
static int hf_payload = -1;
static gint ett_bjnp = -1;
static dissector_handle_t bjnp_handle;
static const value_string dev_type_vals[] = {
{ PRINTER_COMMAND, "Printer Command" },
{ SCANNER_COMMAND, "Scanner Command" },
{ PRINTER_RESPONSE, "Printer Response" },
{ SCANNER_RESPONSE, "Scanner Response" },
{ 0, NULL }
};
static const value_string cmd_code_vals[] = {
{ CMD_DISCOVER, "Discover" },
{ CMD_PRINT_JOB_DET, "Print Job Details" },
{ CMD_CLOSE, "Request Closure" },
{ CMD_GET_STATUS, "Get Printer Status" },
{ CMD_PRINT, "Print" },
{ CMD_GET_ID, "Get Printer Identity" },
{ CMD_SCAN_JOB, "Scan Job Details" },
{ 0, NULL }
};
static int dissect_bjnp (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
proto_tree *bjnp_tree;
proto_item *ti;
gint offset = 0;
guint32 payload_len;
guint8 dev_type, cmd_code;
gchar *info;
/* If it does not start with a printable character it's not BJNP */
if(!g_ascii_isprint(tvb_get_guint8(tvb, 0)))
return 0;
col_set_str (pinfo->cinfo, COL_PROTOCOL, PSNAME);
col_clear (pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item (tree, proto_bjnp, tvb, offset, -1, ENC_NA);
bjnp_tree = proto_item_add_subtree (ti, ett_bjnp);
proto_tree_add_item (bjnp_tree, hf_bjnp_id, tvb, offset, 4, ENC_ASCII);
offset += 4;
dev_type = tvb_get_guint8 (tvb, offset);
proto_tree_add_item (bjnp_tree, hf_dev_type, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
cmd_code = tvb_get_guint8 (tvb, offset);
proto_tree_add_item (bjnp_tree, hf_cmd_code, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
info = wmem_strdup_printf(pinfo->pool, "%s: %s",
val_to_str (dev_type, dev_type_vals, "Unknown type (%d)"),
val_to_str (cmd_code, cmd_code_vals, "Unknown code (%d)"));
proto_item_append_text (ti, ", %s", info);
col_add_str (pinfo->cinfo, COL_INFO, info);
proto_tree_add_item (bjnp_tree, hf_seq_no, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item (bjnp_tree, hf_session_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
payload_len = tvb_get_ntohl (tvb, offset);
proto_tree_add_item (bjnp_tree, hf_payload_len, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
if (payload_len > 0) {
/* TBD: Dissect various commands */
proto_tree_add_item (bjnp_tree, hf_payload, tvb, offset, payload_len, ENC_NA);
offset += payload_len;
}
return offset;
}
void proto_register_bjnp (void)
{
static hf_register_info hf[] = {
{ &hf_bjnp_id,
{ "Id", "bjnp.id", FT_STRING, BASE_NONE,
NULL, 0x0, NULL, HFILL } },
{ &hf_dev_type,
{ "Type", "bjnp.type", FT_UINT8, BASE_DEC,
VALS(dev_type_vals), 0x0, NULL, HFILL } },
{ &hf_cmd_code,
{ "Code", "bjnp.code", FT_UINT8, BASE_DEC,
VALS(cmd_code_vals), 0x0, NULL, HFILL } },
{ &hf_seq_no,
{ "Sequence Number", "bjnp.seq_no", FT_UINT32, BASE_DEC,
NULL, 0x0, NULL, HFILL } },
{ &hf_session_id,
{ "Session Id", "bjnp.session_id", FT_UINT16, BASE_DEC,
NULL, 0x0, NULL, HFILL } },
{ &hf_payload_len,
{ "Payload Length", "bjnp.payload_len", FT_UINT32, BASE_DEC,
NULL, 0x0, NULL, HFILL } },
{ &hf_payload,
{ "Payload", "bjnp.payload", FT_BYTES, BASE_NONE,
NULL, 0x0, NULL, HFILL } },
};
static gint *ett[] = {
&ett_bjnp
};
proto_bjnp = proto_register_protocol (PNAME, PSNAME, PFNAME);
bjnp_handle = register_dissector (PFNAME, dissect_bjnp, proto_bjnp);
proto_register_field_array (proto_bjnp, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
}
void proto_reg_handoff_bjnp (void)
{
dissector_add_uint_range_with_preference("udp.port", BJNP_PORT_RANGE, bjnp_handle);
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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