forked from osmocom/wireshark
![Alexis La Goutte](/assets/img/avatar_default.png)
Change-Id: I46cd2392022b5fb64e997c74650f6a2002f519c6 Reviewed-on: https://code.wireshark.org/review/27216 Reviewed-by: Ivan Nardi <nardi.ivan@gmail.com> Reviewed-by: Anders Broman <a.broman58@gmail.com>
719 lines
22 KiB
C
719 lines
22 KiB
C
/* packet-bfcp.c
|
|
* Routines for Binary Floor Control Protocol(BFCP) dissection
|
|
* Copyright 2012, Nitinkumar Yemul <nitinkumaryemul@gmail.com>
|
|
*
|
|
* Updated with attribute dissection
|
|
* Copyright 2012, Anders Broman <anders.broman@ericsson.com>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*
|
|
* BFCP Message structure is defined in RFC 4582bis
|
|
*/
|
|
#include "config.h"
|
|
|
|
#include <epan/packet.h>
|
|
#include <epan/prefs.h>
|
|
#include <epan/expert.h>
|
|
|
|
void proto_register_bfcp(void);
|
|
void proto_reg_handoff_bfcp(void);
|
|
|
|
/* Initialize protocol and registered fields */
|
|
static int proto_bfcp = -1;
|
|
|
|
static int hf_bfcp_version = -1;
|
|
static int hf_bfcp_hdr_r_bit = -1;
|
|
static int hf_bfcp_hdr_f_bit = -1;
|
|
static int hf_bfcp_primitive = -1;
|
|
static int hf_bfcp_payload_length = -1;
|
|
static int hf_bfcp_conference_id = -1;
|
|
static int hf_bfcp_transaction_id = -1;
|
|
static int hf_bfcp_user_id = -1;
|
|
static int hf_bfcp_payload = -1;
|
|
static int hf_bfcp_attribute_types = -1;
|
|
static int hf_bfcp_attribute_types_m_bit = -1;
|
|
static int hf_bfcp_attribute_length = -1;
|
|
static int hf_bfcp_beneficiary_id = -1;
|
|
static int hf_bfcp_floor_id = -1;
|
|
static int hf_bfcp_floor_request_id = -1;
|
|
static int hf_bfcp_priority = -1;
|
|
static int hf_bfcp_request_status = -1;
|
|
static int hf_bfcp_queue_pos = -1;
|
|
static int hf_bfcp_error_code = -1;
|
|
static int hf_bfcp_error_info_text = -1;
|
|
static int hf_bfcp_part_prov_info_text = -1;
|
|
static int hf_bfcp_status_info_text = -1;
|
|
static int hf_bfcp_supp_attr = -1;
|
|
static int hf_bfcp_supp_prim = -1;
|
|
static int hf_bfcp_user_disp_name = -1;
|
|
static int hf_bfcp_user_uri = -1;
|
|
static int hf_bfcp_req_by_id = -1;
|
|
static int hf_bfcp_padding = -1;
|
|
static int hf_bfcp_error_specific_details = -1;
|
|
|
|
/* Initialize subtree pointers */
|
|
static gint ett_bfcp = -1;
|
|
static gint ett_bfcp_attr = -1;
|
|
|
|
static expert_field ei_bfcp_attribute_length_too_small = EI_INIT;
|
|
|
|
static dissector_handle_t bfcp_handle;
|
|
|
|
/* Initialize BFCP primitives */
|
|
static const value_string map_bfcp_primitive[] = {
|
|
{ 0, "<Invalid Primitive>"},
|
|
{ 1, "FloorRequest"},
|
|
{ 2, "FloorRelease"},
|
|
{ 3, "FloorRequestQuery"},
|
|
{ 4, "FloorRequestStatus"},
|
|
{ 5, "UserQuery"},
|
|
{ 6, "UserStatus"},
|
|
{ 7, "FloorQuery"},
|
|
{ 8, "FloorStatus"},
|
|
{ 9, "ChairAction"},
|
|
{ 10, "ChairActionAck"},
|
|
{ 11, "Hello"},
|
|
{ 12, "HelloAck"},
|
|
{ 13, "Error"},
|
|
{ 14, "FloorRequestStatusAck"},
|
|
{ 15, "ErrorAck"},
|
|
{ 16, "FloorStatusAck"},
|
|
{ 17, "Goodbye"},
|
|
{ 18, "GoodbyeAck"},
|
|
{ 0, NULL},
|
|
};
|
|
|
|
static const value_string map_bfcp_attribute_types[] = {
|
|
{ 0, "<Invalid Primitive>"},
|
|
{ 1, "BeneficiaryID"},
|
|
{ 2, "FloorID"},
|
|
{ 3, "FloorRequestID"},
|
|
{ 4, "Priority"},
|
|
{ 5, "RequestStatus"},
|
|
{ 6, "ErrorCode"},
|
|
{ 7, "ErrorInfo"},
|
|
{ 8, "ParticipantProvidedInfo"},
|
|
{ 9, "StatusInfo"},
|
|
{ 10, "SupportedAttributes"},
|
|
{ 11, "SupportedPrimitives"},
|
|
{ 12, "UserDisplayName"},
|
|
{ 13, "UserURI"},
|
|
{ 14, "BeneficiaryInformation"},
|
|
{ 15, "FloorRequestInformation"},
|
|
{ 16, "RequestedByInformation"},
|
|
{ 17, "FloorRequestStatus"},
|
|
{ 18, "OverallRequestStatus"},
|
|
{ 0, NULL},
|
|
};
|
|
|
|
static const value_string map_bfcp_request_status[] = {
|
|
{ 0, "<Invalid Primitive>"},
|
|
{ 1, "Pending"},
|
|
{ 2, "Accepted"},
|
|
{ 3, "Granted"},
|
|
{ 4, "Denied"},
|
|
{ 5, "Cancelled"},
|
|
{ 6, "Released"},
|
|
{ 7, "Revoked"},
|
|
{ 0, NULL},
|
|
};
|
|
|
|
/* 5.2.6. ERROR-CODE */
|
|
static const value_string bfcp_error_code_valuse[] = {
|
|
{ 1, "Conference does not Exist"},
|
|
{ 2, "User does not Exist"},
|
|
{ 3, "Unknown Primitive"},
|
|
{ 4, "Unknown Mandatory Attribute"},
|
|
{ 5, "Unauthorized Operation"},
|
|
{ 6, "Invalid Floor ID"},
|
|
{ 7, "Floor Request ID Does Not Exist"},
|
|
{ 8, "You have Already Reached the Maximum Number of Ongoing Floor Requests for this Floor"},
|
|
{ 9, "Use TLS"},
|
|
{ 10, "Unable to Parse Message"},
|
|
{ 11, "Use DTLS"},
|
|
{ 12, "Unsupported Version"},
|
|
{ 13, "Incorrect Message Length"},
|
|
{ 14, "Generic Error"},
|
|
|
|
{ 0, NULL},
|
|
};
|
|
|
|
/*Define offset for fields in BFCP packet */
|
|
#define BFCP_OFFSET_TRANSACTION_INITIATOR 0
|
|
#define BFCP_OFFSET_PRIMITIVE 1
|
|
#define BFCP_OFFSET_PAYLOAD_LENGTH 2
|
|
#define BFCP_OFFSET_CONFERENCE_ID 4
|
|
#define BFCP_OFFSET_TRANSACTION_ID 8
|
|
#define BFCP_OFFSET_USER_ID 10
|
|
#define BFCP_OFFSET_PAYLOAD 12
|
|
|
|
static int
|
|
dissect_bfcp_attributes(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset, int bfcp_payload_length)
|
|
{
|
|
proto_item *ti, *item;
|
|
proto_tree *bfcp_attr_tree = NULL;
|
|
gint attr_start_offset;
|
|
gint length;
|
|
guint8 attribute_type;
|
|
gint read_attr = 0;
|
|
guint8 first_byte, pad_len;
|
|
|
|
while ((tvb_reported_length_remaining(tvb, offset) >= 2) &&
|
|
((bfcp_payload_length - read_attr) >= 2))
|
|
{
|
|
|
|
attr_start_offset = offset;
|
|
first_byte = tvb_get_guint8(tvb, offset);
|
|
|
|
/* Padding so continue to next attribute */
|
|
if (first_byte == 0){
|
|
read_attr++;
|
|
continue;
|
|
}
|
|
|
|
ti = proto_tree_add_item(tree, hf_bfcp_attribute_types, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
bfcp_attr_tree = proto_item_add_subtree(ti, ett_bfcp_attr);
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_attribute_types_m_bit, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
attribute_type = (first_byte & 0xFE) >> 1;
|
|
offset++;
|
|
|
|
/* Length: This 8-bit field contains the length of the attribute in
|
|
* octets, excluding any padding defined for specific attributes. The
|
|
* length of attributes that are not grouped includes the Type, 'M' bit,
|
|
* and Length fields. The Length in grouped attributes is the length of
|
|
* the grouped attribute itself (including Type, 'M' bit, and Length
|
|
* fields) plus the total length (including padding) of all the included
|
|
* attributes.
|
|
*/
|
|
|
|
item = proto_tree_add_item(bfcp_attr_tree, hf_bfcp_attribute_length, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
length = tvb_get_guint8(tvb, offset);
|
|
/* At least Type, M bit and Length fields */
|
|
if (length < 2){
|
|
expert_add_info_format(pinfo, item, &ei_bfcp_attribute_length_too_small,
|
|
"Attribute length is too small (%d bytes - minimum valid is 2)", length);
|
|
break;
|
|
}
|
|
offset++;
|
|
|
|
switch(attribute_type){
|
|
case 1: /* Beneficiary ID */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_beneficiary_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
break;
|
|
case 2: /* FLOOR-ID */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_floor_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
break;
|
|
case 3: /* FLOOR-REQUEST-ID */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_floor_request_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
break;
|
|
case 4: /* PRIORITY */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_priority, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
break;
|
|
case 5: /* REQUEST-STATUS */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_request_status, tvb, offset,1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
/* Queue Position */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_queue_pos, tvb, offset,1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
break;
|
|
case 6: /* ERROR-CODE */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_error_code, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
if(length>3){
|
|
/* We have Error Specific Details */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_error_specific_details, tvb, offset, length-3, ENC_NA);
|
|
}
|
|
offset = offset + length-3;
|
|
pad_len = length & 0x03;
|
|
if(pad_len != 0){
|
|
pad_len = 4 - pad_len;
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_padding, tvb, offset, pad_len, ENC_NA);
|
|
}
|
|
offset = offset + pad_len;
|
|
break;
|
|
case 7: /* ERROR-INFO */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_error_info_text, tvb, offset, length-3, ENC_ASCII|ENC_NA);
|
|
offset = offset + length-3;
|
|
pad_len = length & 0x03;
|
|
if(pad_len != 0){
|
|
pad_len = 4 - pad_len;
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_padding, tvb, offset, pad_len, ENC_NA);
|
|
}
|
|
offset = offset + pad_len;
|
|
break;
|
|
case 8: /* PARTICIPANT-PROVIDED-INFO */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_part_prov_info_text, tvb, offset, length-3, ENC_ASCII|ENC_NA);
|
|
offset = offset + length-3;
|
|
pad_len = length & 0x03;
|
|
if(pad_len != 0){
|
|
pad_len = 4 - pad_len;
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_padding, tvb, offset, pad_len, ENC_NA);
|
|
}
|
|
offset = offset + pad_len;
|
|
break;
|
|
case 9: /* STATUS-INFO */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_status_info_text, tvb, offset, length-3, ENC_ASCII|ENC_NA);
|
|
offset = offset + length-3;
|
|
pad_len = length & 0x03;
|
|
if(pad_len != 0){
|
|
pad_len = 4 - pad_len;
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_padding, tvb, offset, pad_len, ENC_NA);
|
|
}
|
|
offset = offset + pad_len;
|
|
break;
|
|
case 10: /* SUPPORTED-ATTRIBUTES */
|
|
|
|
while(offset < (attr_start_offset+length)){
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_supp_attr, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset+=1;
|
|
}
|
|
pad_len = length & 0x03;
|
|
if(pad_len != 0){
|
|
pad_len = 4 - pad_len;
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_padding, tvb, offset, pad_len, ENC_NA);
|
|
}
|
|
offset = offset + pad_len;
|
|
break;
|
|
case 11: /* SUPPORTED-PRIMITIVES */
|
|
|
|
while(offset < (attr_start_offset+length)){
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_supp_prim, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset+=1;
|
|
}
|
|
pad_len = length & 0x03;
|
|
if(pad_len != 0){
|
|
pad_len = 4 - pad_len;
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_padding, tvb, offset, pad_len, ENC_NA);
|
|
}
|
|
offset = offset + pad_len;
|
|
break;
|
|
case 12: /* USER-DISPLAY-NAME */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_user_disp_name, tvb, offset, length-3, ENC_ASCII|ENC_NA);
|
|
offset = offset + length-3;
|
|
pad_len = length & 0x03;
|
|
if(pad_len != 0){
|
|
pad_len = 4 - pad_len;
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_padding, tvb, offset, pad_len, ENC_NA);
|
|
}
|
|
offset = offset + pad_len;
|
|
break;
|
|
case 13: /* USER-URI */
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_user_uri, tvb, offset, length-3, ENC_ASCII|ENC_NA);
|
|
offset = offset + length-3;
|
|
pad_len = length & 0x03;
|
|
if(pad_len != 0){
|
|
pad_len = 4 - pad_len;
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_padding, tvb, offset, pad_len, ENC_NA);
|
|
}
|
|
offset = offset + pad_len;
|
|
break;
|
|
case 14: /* BENEFICIARY-INFORMATION */
|
|
/* The BENEFICIARY-INFORMATION attribute is a grouped attribute that
|
|
* consists of a header, which is referred to as BENEFICIARY-
|
|
* INFORMATION-HEADER, followed by a sequence of attributes.
|
|
*/
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_beneficiary_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
offset = dissect_bfcp_attributes(tvb, pinfo, bfcp_attr_tree, offset, length -4);
|
|
break;
|
|
case 15: /* FLOOR-REQUEST-INFORMATION */
|
|
/* The FLOOR-REQUEST-INFORMATION attribute is a grouped attribute that
|
|
* consists of a header, which is referred to as FLOOR-REQUEST-
|
|
* INFORMATION-HEADER, followed by a sequence of attributes.
|
|
*/
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_floor_request_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
offset = dissect_bfcp_attributes(tvb, pinfo, bfcp_attr_tree, offset, length -4);
|
|
break;
|
|
case 16: /* REQUESTED-BY-INFORMATION */
|
|
/* The REQUESTED-BY-INFORMATION attribute is a grouped attribute that
|
|
* consists of a header, which is referred to as FLOOR-REQUEST-STATUS-
|
|
* -HEADER, followed by a sequence of attributes.
|
|
*/
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_req_by_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
offset = dissect_bfcp_attributes(tvb, pinfo, bfcp_attr_tree, offset, length -4);
|
|
break;
|
|
case 17: /* FLOOR-REQUEST-STATUS */
|
|
/* The FLOOR-REQUEST-STATUS attribute is a grouped attribute that
|
|
* consists of a header, which is referred to as OVERALL-REQUEST-STATUS-
|
|
* -HEADER, followed by a sequence of attributes.
|
|
*/
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_floor_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
offset = dissect_bfcp_attributes(tvb, pinfo, bfcp_attr_tree, offset, length -4);
|
|
break;
|
|
case 18: /* OVERALL-REQUEST-STATUS */
|
|
/* The OVERALL-REQUEST-STATUS attribute is a grouped attribute that
|
|
* consists of a header, which is referred to as FLOOR-REQUEST-
|
|
* INFORMATION-HEADER, followed by a sequence of attributes.
|
|
*/
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_floor_request_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
offset = dissect_bfcp_attributes(tvb, pinfo, bfcp_attr_tree, offset, length -4);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_item(bfcp_attr_tree, hf_bfcp_payload, tvb, offset, length-2, ENC_NA);
|
|
/* Advance by any length attributable to payload */
|
|
offset = offset + length - 2;
|
|
break;
|
|
}
|
|
read_attr = read_attr + length;
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
dissect_bfcp_heur_check(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree _U_, void *data _U_)
|
|
{
|
|
guint8 primitive;
|
|
guint8 first_byte;
|
|
const gchar *str;
|
|
|
|
|
|
/* Size of smallest BFCP packet: 12 octets */
|
|
if (tvb_captured_length(tvb) < 12)
|
|
return FALSE;
|
|
|
|
/* Check version and reserved bits in first byte */
|
|
first_byte = tvb_get_guint8(tvb, 0);
|
|
|
|
/* If first_byte of bfcp_packet is a combination of the
|
|
* version and the I bit. The value must be either 0x20 or 0x30
|
|
* if the bit is set, otherwise it is not BFCP.
|
|
*/
|
|
if ((first_byte != 0x20) && (first_byte != 0x30))
|
|
return FALSE;
|
|
|
|
primitive = tvb_get_guint8(tvb, 1);
|
|
|
|
if ((primitive < 1) || (primitive > 18))
|
|
return FALSE;
|
|
|
|
str = try_val_to_str(primitive, map_bfcp_primitive);
|
|
if (NULL == str)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Code to actually dissect BFCP packets */
|
|
static int
|
|
dissect_bfcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
|
|
{
|
|
int offset = 0;
|
|
guint8 primitive;
|
|
const gchar *str;
|
|
gint bfcp_payload_length;
|
|
proto_tree *bfcp_tree;
|
|
proto_item *ti;
|
|
|
|
if (!dissect_bfcp_heur_check(tvb, pinfo, tree, data))
|
|
return 0;
|
|
|
|
primitive = tvb_get_guint8(tvb, 1);
|
|
str = try_val_to_str(primitive, map_bfcp_primitive);
|
|
|
|
/* Make entries in Protocol column and Info column on summary display*/
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BFCP");
|
|
col_add_str(pinfo->cinfo, COL_INFO, str);
|
|
|
|
ti = proto_tree_add_item(tree, proto_bfcp, tvb, 0, -1, ENC_NA);
|
|
bfcp_tree = proto_item_add_subtree(ti, ett_bfcp);
|
|
/*
|
|
The following is the format of the common header.
|
|
|
|
0 1 2 3
|
|
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
| Ver |R|F| Res | Primitive | Payload Length |
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
| Conference ID |
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
| Transaction ID | User ID |
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
| Fragment Offset (if F is set) | Fragment Length (if F is set) |
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
|
|
|
|
*/
|
|
/* Add items to BFCP tree */
|
|
proto_tree_add_item(bfcp_tree, hf_bfcp_version, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(bfcp_tree, hf_bfcp_hdr_r_bit, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(bfcp_tree, hf_bfcp_hdr_f_bit, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
proto_tree_add_item(bfcp_tree, hf_bfcp_primitive, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
proto_tree_add_item(bfcp_tree, hf_bfcp_payload_length, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
proto_tree_add_item(bfcp_tree, hf_bfcp_conference_id, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset+=4;
|
|
proto_tree_add_item(bfcp_tree, hf_bfcp_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
proto_tree_add_item(bfcp_tree, hf_bfcp_user_id, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset+=2;
|
|
|
|
bfcp_payload_length = tvb_get_ntohs(tvb,
|
|
BFCP_OFFSET_PAYLOAD_LENGTH) * 4;
|
|
|
|
/*offset = */dissect_bfcp_attributes(tvb, pinfo, bfcp_tree, offset, bfcp_payload_length);
|
|
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
static gboolean
|
|
dissect_bfcp_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
|
|
{
|
|
if (!dissect_bfcp_heur_check(tvb, pinfo, tree, data))
|
|
return FALSE;
|
|
|
|
dissect_bfcp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
|
|
void proto_register_bfcp(void)
|
|
{
|
|
module_t *bfcp_module;
|
|
expert_module_t* expert_bfcp;
|
|
|
|
static hf_register_info hf[] = {
|
|
{
|
|
&hf_bfcp_version,
|
|
{ "Version(ver)", "bfcp.ver",
|
|
FT_UINT8, BASE_DEC, NULL, 0xe0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_hdr_r_bit,
|
|
{ "Transaction Responder (R)", "bfcp.hdr_r_bit",
|
|
FT_BOOLEAN, 8, NULL, 0x10,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_hdr_f_bit,
|
|
{ "Fragmentation (F)", "bfcp.hdr_f_bit",
|
|
FT_BOOLEAN, 8, NULL, 0x08,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_primitive,
|
|
{ "Primitive", "bfcp.primitive",
|
|
FT_UINT8, BASE_DEC, VALS(map_bfcp_primitive), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_payload_length,
|
|
{ "Payload Length", "bfcp.payload_length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_conference_id,
|
|
{ "Conference ID", "bfcp.conference_id",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_transaction_id,
|
|
{ "Transaction ID", "bfcp.transaction_id",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_user_id,
|
|
{ "User ID", "bfcp.user_id",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_payload,
|
|
{ "Payload", "bfcp.payload",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0, NULL,
|
|
HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_attribute_types,
|
|
{ "Attribute Type", "bfcp.attribute_type",
|
|
FT_UINT8, BASE_DEC, VALS(map_bfcp_attribute_types), 0xFE,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_attribute_types_m_bit,
|
|
{ "Mandatory bit(M)", "bfcp.attribute_types_m_bit",
|
|
FT_BOOLEAN, 8, NULL, 0x01,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_attribute_length,
|
|
{ "Attribute Length", "bfcp.attribute_length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_beneficiary_id,
|
|
{ "BENEFICIARY-ID", "bfcp.beneficiary_id",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_floor_id,
|
|
{ "FLOOR-ID", "bfcp.floor_id",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_floor_request_id,
|
|
{ "FLOOR-REQUEST-ID", "bfcp.floorrequest_id",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_priority,
|
|
{ "FLOOR-REQUEST-ID", "bfcp.priority",
|
|
FT_UINT16, BASE_DEC, NULL, 0xe000,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_request_status,
|
|
{ "Request Status", "bfcp.request_status",
|
|
FT_UINT8, BASE_DEC, VALS(map_bfcp_request_status), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_queue_pos,
|
|
{ "Queue Position", "bfcp.queue_pos",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_error_code,
|
|
{ "Error Code", "bfcp.error_code",
|
|
FT_UINT8, BASE_DEC, VALS(bfcp_error_code_valuse), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_error_info_text,
|
|
{ "Text", "bfcp.error_info_text",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_part_prov_info_text,
|
|
{ "Text", "bfcp.part_prov_info_text",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_status_info_text,
|
|
{ "Text", "bfcp.status_info_text",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_supp_attr,
|
|
{ "Supported Attribute", "bfcp.supp_attr",
|
|
FT_UINT8, BASE_DEC, VALS(map_bfcp_attribute_types), 0xFE,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_supp_prim,
|
|
{ "Supported Primitive", "bfcp.supp_primitive",
|
|
FT_UINT8, BASE_DEC, VALS(map_bfcp_primitive), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_user_disp_name,
|
|
{ "Name", "bfcp.user_disp_name",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_user_uri,
|
|
{ "URI", "bfcp.user_uri",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_req_by_id,
|
|
{ "Requested-by ID", "bfcp.req_by_i",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_padding,
|
|
{ "Padding", "bfcp.padding",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{
|
|
&hf_bfcp_error_specific_details,
|
|
{ "Error Specific Details", "bfcp.error_specific_details",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_bfcp,
|
|
&ett_bfcp_attr,
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_bfcp_attribute_length_too_small, { "bfcp.attribute_length.too_small", PI_MALFORMED, PI_ERROR, "Attribute length is too small", EXPFILL }},
|
|
};
|
|
|
|
/* Register protocol name and description */
|
|
proto_bfcp = proto_register_protocol("Binary Floor Control Protocol",
|
|
"BFCP", "bfcp");
|
|
|
|
bfcp_handle = register_dissector("bfcp", dissect_bfcp, proto_bfcp);
|
|
|
|
bfcp_module = prefs_register_protocol(proto_bfcp, NULL);
|
|
|
|
prefs_register_obsolete_preference(bfcp_module, "enable");
|
|
|
|
/* Register field and subtree array */
|
|
proto_register_field_array(proto_bfcp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
expert_bfcp = expert_register_protocol(proto_bfcp);
|
|
expert_register_field_array(expert_bfcp, ei, array_length(ei));
|
|
}
|
|
|
|
void proto_reg_handoff_bfcp(void)
|
|
{
|
|
/* "Decode As" is always available;
|
|
* Heuristic dissection in disabled by default since
|
|
* the heuristic is quite weak.
|
|
*/
|
|
heur_dissector_add("tcp", dissect_bfcp_heur, "BFCP over TCP", "bfcp_tcp", proto_bfcp, HEURISTIC_DISABLE);
|
|
heur_dissector_add("udp", dissect_bfcp_heur, "BFCP over UDP", "bfcp_udp", proto_bfcp, HEURISTIC_DISABLE);
|
|
dissector_add_for_decode_as_with_preference("tcp.port", bfcp_handle);
|
|
dissector_add_for_decode_as_with_preference("udp.port", bfcp_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|