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wireshark/epan/dissectors/packet-alljoyn.c

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/* packet-allJoyn.c
* Routines for AllJoyn (AllJoyn.org) packet dissection
* Copyright (c) 2013-2014, The Linux Foundation.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
void proto_register_AllJoyn(void);
void proto_reg_handoff_AllJoyn(void);
static const int name_server_port = 9956;
static const int message_port = 9955;
/* DBus limits array length to 2^26. AllJoyn limits it to 2^17 */
#define MAX_ARRAY_LEN 131072
/* DBus limits packet length to 2^27. AllJoyn limits it further to 2^17 + 4096 to allow for 2^17 payload */
#define MAX_PACKET_LEN (MAX_ARRAY_LEN + 4096)
/* The following are protocols within a frame.
The actual value of the handle is set when the various fields are
registered in proto_register_AllJoyn() with a call to
proto_register_protocol().
*/
static int proto_AllJoyn_mess = -1; /* The top level. Entire AllJoyn message protocol. */
/* These are Wireshark header fields. You can search/filter on these values. */
/* The initial byte sent when first connecting. */
static int hf_alljoyn_connect_byte_value = -1;
/* SASL fields. */
static int hf_alljoyn_sasl_command = -1;
static int hf_alljoyn_sasl_parameter = -1;
/* Message header fields.
See http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
for details. */
static int hf_alljoyn_mess_header = -1; /* The complete header. */
static int hf_alljoyn_mess_header_endian = -1; /* 1st byte. */
static int hf_alljoyn_mess_header_type = -1; /* 2nd byte. */
static int hf_alljoyn_mess_header_flags = -1; /* 3rd byte. */
static int hf_alljoyn_mess_header_majorversion = -1; /* 4th byte. */
static int hf_alljoyn_mess_header_body_length = -1; /* 1st uint32. */
static int hf_alljoyn_mess_header_serial = -1; /* 2nd uint32. */
static int hf_alljoyn_mess_header_header_length = -1;/* 3rd uint32. AllJoyn extension. */
static int hf_alljoyn_mess_header_flags_no_reply = -1; /* Part of 3rd byte. */
static int hf_alljoyn_mess_header_flags_no_auto_start = -1; /* Part of 3rd byte. */
static int hf_alljoyn_mess_header_flags_allow_remote_msg = -1; /* Part of 3rd byte. */
static int hf_alljoyn_mess_header_flags_sessionless = -1; /* Part of 3rd byte. */
static int hf_alljoyn_mess_header_flags_global_broadcast = -1; /* Part of 3rd byte. */
static int hf_alljoyn_mess_header_flags_compressed = -1; /* Part of 3rd byte. */
static int hf_alljoyn_mess_header_flags_encrypted = -1; /* Part of 3rd byte. */
static int hf_alljoyn_mess_header_field = -1;
static int hf_alljoyn_mess_header_fields = -1;
static int hf_alljoyn_mess_body_header_fieldcode = -1;
static int hf_alljoyn_mess_body_header_typeid = -1;
static int hf_alljoyn_mess_body_array = -1;
static int hf_alljoyn_mess_body_structure = -1;
static int hf_alljoyn_mess_body_dictionary_entry = -1;
static int hf_alljoyn_mess_body_parameters = -1;
static int hf_alljoyn_mess_body_variant = -1;
static int hf_alljoyn_mess_body_signature = -1;
static int hf_alljoyn_mess_body_signature_length = -1;
static int hf_alljoyn_boolean = -1;
static int hf_alljoyn_uint8 = -1;
static int hf_alljoyn_int16 = -1;
static int hf_alljoyn_uint16 = -1;
static int hf_alljoyn_int32 = -1;
static int hf_alljoyn_handle = -1;
static int hf_alljoyn_uint32 = -1;
static int hf_alljoyn_int64 = -1;
static int hf_alljoyn_uint64 = -1;
static int hf_alljoyn_double = -1;
static int hf_padding = -1; /* Some fields are padded to an even number of 2, 4, or 8 bytes. */
#define MESSAGE_HEADER_FLAG_NO_REPLY_EXPECTED 0x01
#define MESSAGE_HEADER_FLAG_NO_AUTO_START 0x02
#define MESSAGE_HEADER_FLAG_ALLOW_REMOTE_MSG 0x04
#define MESSAGE_HEADER_FLAG_SESSIONLESS 0x10
#define MESSAGE_HEADER_FLAG_GLOBAL_BROADCAST 0x20
#define MESSAGE_HEADER_FLAG_COMPRESSED 0x40
#define MESSAGE_HEADER_FLAG_ENCRYPTED 0x80
/* Protocol identifiers. */
static int proto_AllJoyn_ns = -1; /* The top level. Entire AllJoyn Name Service protocol. */
static int hf_alljoyn_answer = -1;
static int hf_alljoyn_isat_entry = -1;
static int hf_alljoyn_isat_guid_string = -1;
static int hf_alljoyn_ns_header = -1;
static int hf_alljoyn_ns_sender_version = -1;
static int hf_alljoyn_ns_message_version = -1;
static int hf_alljoyn_ns_questions = -1;
static int hf_alljoyn_ns_answers = -1;
static int hf_alljoyn_ns_timer = -1;
/* These are bit masks for version 0 "who has" records. */
/* These bits are deprecated and do not exist for version 1. */
#define WHOHAS_T 0x08
#define WHOHAS_U 0x04
#define WHOHAS_S 0x02
#define WHOHAS_F 0x01
static int hf_alljoyn_ns_whohas = -1;
static int hf_alljoyn_ns_whohas_t_flag = -1; /* 0x8 -- TCP */
static int hf_alljoyn_ns_whohas_u_flag = -1; /* 0x4 -- UDP */
static int hf_alljoyn_ns_whohas_s_flag = -1; /* 0x2 -- IPV6 */
static int hf_alljoyn_ns_whohas_f_flag = -1; /* 0x1 -- IPV4 */
/* End of version 0 bit masks. */
static int hf_alljoyn_ns_whohas_count = -1; /* octet count of bus names */
/* Bitmasks common to v0 and v1 IS-AT messages. */
#define ISAT_C 0x10
#define ISAT_G 0x20
/* Bitmasks for v0 IS-AT messages. */
#define ISAT_F 0x01
#define ISAT_S 0x02
#define ISAT_U 0x04
#define ISAT_T 0x08
/* Bitmasks for v1 IS-AT messages. */
#define ISAT_U6 0x01
#define ISAT_R6 0x02
#define ISAT_U4 0x04
#define ISAT_R4 0x08
/* Bitmasks for v1 transports. */
#define TRANSPORT_LOCAL 0x0001 /* Local (same device) transport. */
#define TRANSPORT_BLUETOOTH 0x0002 /* Bluetooth transport. */
#define TRANSPORT_TCP 0x0004 /* Transport using TCP (same as TRANSPORT_WLAN). */
#define TRANSPORT_WWAN 0x0008 /* Wireless wide-area network transport. */
#define TRANSPORT_LAN 0x0010 /* Wired local-area network transport. */
#define TRANSPORT_ICE 0x0020 /* Transport using ICE protocol. */
#define TRANSPORT_WFD 0x0080 /* Transport using Wi-Fi Direct transport. */
/* Tree indexes common to v0 and v1 IS-AT messages. */
static int hf_alljoyn_ns_isat_g_flag = -1; /* 0x20 -- GUID present */
static int hf_alljoyn_ns_isat_c_flag = -1; /* 0x10 -- Complete */
/* Tree indexes for v0 IS-AT messages. */
static int hf_alljoyn_ns_isat_t_flag = -1; /* 0x8 -- TCP */
static int hf_alljoyn_ns_isat_u_flag = -1; /* 0x4 -- UDP */
static int hf_alljoyn_ns_isat_s_flag = -1; /* 0x2 -- IPV6 */
static int hf_alljoyn_ns_isat_f_flag = -1; /* 0x1 -- IPV4 */
static int hf_alljoyn_ns_isat_count = -1; /* octet count of bus names */
static int hf_alljoyn_ns_isat_port = -1; /* two octets of port number */
static int hf_alljoyn_ns_isat_ipv4 = -1; /* four octets of IPv4 address */
static int hf_alljoyn_ns_isat_ipv6 = -1; /* sixteen octets of IPv6 address */
/* Tree indexes for v1 IS-AT messages. */
static int hf_alljoyn_ns_isat_u6_flag = -1; /* 0x8 -- UDP IPV6 */
static int hf_alljoyn_ns_isat_r6_flag = -1; /* 0x4 -- TCP IPV6 */
static int hf_alljoyn_ns_isat_u4_flag = -1; /* 0x2 -- UDP IPV4 */
static int hf_alljoyn_ns_isat_r4_flag = -1; /* 0x1 -- TCP IPV4 */
static int hf_alljoyn_ns_isat_transport_mask = -1; /* All bits of the transport mask. */
/* Individual bits of the mask. */
static int hf_alljoyn_ns_isat_transport_mask_local = -1; /* Local (same device) transport */
static int hf_alljoyn_ns_isat_transport_mask_bluetooth = -1;/* Bluetooth transport */
static int hf_alljoyn_ns_isat_transport_mask_tcp = -1; /* Transport using TCP (same as TRANSPORT_WLAN) */
static int hf_alljoyn_ns_isat_transport_mask_wwan = -1; /* Wireless wide-area network transport */
static int hf_alljoyn_ns_isat_transport_mask_lan = -1; /* Wired local-area network transport */
static int hf_alljoyn_ns_isat_transport_mask_ice = -1; /* Transport using ICE protocol */
static int hf_alljoyn_ns_isat_transport_mask_wfd = -1; /* Transport using Wi-Fi Direct transport */
static int hf_alljoyn_string = -1;
static int hf_alljoyn_string_size_8bit = -1; /* 8-bit size of string */
static int hf_alljoyn_string_size_32bit = -1; /* 32-bit size of string */
static int hf_alljoyn_string_data = -1; /* string characters */
/* Protocol identifiers. */
static int proto_AllJoyn_ardp = -1; /* The top level. Entire AllJoyn Reliable Datagram Protocol. */
#define ARDP_SYN_FIXED_HDR_LEN 28 /* Size of the fixed part for the ARDP connection packet header. */
#define ARDP_FIXED_HDR_LEN 34 /* Size of the fixed part for the ARDP header. */
#define ARDP_DATA_LENGTH_OFFSET 6 /* Offset into the ARDP header for the data length. */
#define ARDP_HEADER_LEN_OFFSET 1 /* Offset into the ARDP header for the actual length of the header. */
/* These are bit masks for ARDP flags. */
/* These bits are deprecated and do not exist for version 1. */
#define ARDP_SYN 0x01
#define ARDP_ACK 0x02
#define ARDP_EAK 0x04
#define ARDP_RST 0x08
#define ARDP_NUL 0x10
#define ARDP_UNUSED 0x20
#define ARDP_VER0 0x40
#define ARDP_VER1 0x80
#define ARDP_VER (ARDP_VER0 | ARDP_VER1)
static int hf_ardp_syn_flag = -1; /* 0x01 -- SYN */
static int hf_ardp_ack_flag = -1; /* 0x02 -- ACK */
static int hf_ardp_eak_flag = -1; /* 0x04 -- EAK */
static int hf_ardp_rst_flag = -1; /* 0x08 -- RST */
static int hf_ardp_nul_flag = -1; /* 0x10 -- NUL */
static int hf_ardp_unused_flag = -1; /* 0x20 -- UNUSED */
static int hf_ardp_version_field = -1; /* 0xc0 */
static int hf_ardp_hlen = -1; /* header length */
static int hf_ardp_src = -1; /* source port */
static int hf_ardp_dst = -1; /* destination port */
static int hf_ardp_dlen = -1; /* data length */
static int hf_ardp_seq = -1; /* sequence number */
static int hf_ardp_ack = -1; /* acknowledge number */
static int hf_ardp_ttl = -1; /* time to live (ms) */
static int hf_ardp_lcs = -1; /* last consumed sequence number */
static int hf_ardp_nsa = -1; /* next sequence to ack */
static int hf_ardp_fss = -1; /* fragment starting sequence number */
static int hf_ardp_fcnt = -1; /* fragment count */
static int hf_ardp_bmp = -1; /* EACK bitmap */
static int hf_ardp_segmax = -1; /* The maximum number of outstanding segments the other side can send without acknowledgment. */
static int hf_ardp_segbmax = -1;/* The maximum segment size we are willing to receive. */
static int hf_ardp_dackt = -1; /* Receiver's delayed ACK timeout. Used in TTL estimate prior to sending a message. */
static int hf_ardp_options = -1;/* Options for the connection. Always Sequenced Delivery Mode (SDM). */
static expert_field ei_alljoyn_empty_arg = EI_INIT;
/* These are the ids of the subtrees we will be creating */
static gint ett_alljoyn_ns = -1; /* This is the top NS tree. */
static gint ett_alljoyn_ns_header = -1;
static gint ett_alljoyn_ns_answers = -1;
static gint ett_alljoyn_ns_guid_string = -1;
static gint ett_alljoyn_ns_isat_entry = -1;
static gint ett_alljoyn_ns_string = -1;
static gint ett_alljoyn_whohas = -1;
static gint ett_alljoyn_string = -1;
static gint ett_alljoyn_isat_entry = -1;
static gint ett_alljoyn_mess = -1; /* This is the top message tree. */
static gint ett_alljoyn_header = -1;
static gint ett_alljoyn_header_flags = -1;
static gint ett_alljoyn_mess_header_field = -1;
static gint ett_alljoyn_mess_header = -1;
static gint ett_alljoyn_mess_body_parameters = -1;
static gint ett_alljoyn_ardp = -1; /* This is the top ARDP tree. */
#define ROUND_TO_2BYTE(len) ((len + 1) & ~1)
#define ROUND_TO_4BYTE(len) ((len + 3) & ~3)
#define ROUND_TO_8BYTE(len) ((len + 7) & ~7)
static const value_string endian_encoding_vals[] = {
{ 'B', "Big endian" },
{ 'l', "Little endian" },
{ 0, NULL },
};
#define MESSAGE_TYPE_INVALID 0
#define MESSAGE_TYPE_METHOD_CALL 1
#define MESSAGE_TYPE_METHOD_REPLY 2
#define MESSAGE_TYPE_ERROR_REPLY 3
#define MESSAGE_TYPE_SIGNAL 4
static const value_string message_header_encoding_vals[] = {
{ MESSAGE_TYPE_INVALID, "Invalid type" },
{ MESSAGE_TYPE_METHOD_CALL, "Method call" },
{ MESSAGE_TYPE_METHOD_REPLY, "Method reply with returned data" },
{ MESSAGE_TYPE_ERROR_REPLY, "Error reply" },
{ MESSAGE_TYPE_SIGNAL, "Signal emission" },
{ 0, NULL }
};
/*
* The array at the end of the header contains header fields,
* where each field is a 1-byte field code followed by a field value.
* See also: http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
*
* In the D-Bus world these are the "field codes".
* In the AllJoyn world these are called "field types".
*/
#define HDR_INVALID 0x00
#define HDR_OBJ_PATH 0x01
#define HDR_INTERFACE 0x02
#define HDR_MEMBER 0x03
#define HDR_ERROR_NAME 0x04
#define HDR_REPLY_SERIAL 0x05
#define HDR_DESTINATION 0x06
#define HDR_SENDER 0x07
#define HDR_SIGNATURE 0x08
#define HDR_HANDLES 0x09
#define HDR_TIMESTAMP 0x10 /* AllJoyn specific headers start at 0x10 */
#define HDR_TIME_TO_LIVE 0x11
#define HDR_COMPRESSION_TOKEN 0x12
#define HDR_SESSION_ID 0x13
static const value_string mess_header_field_encoding_vals[] = {
{ HDR_INVALID, "Invalid" }, /* Not a valid field name (error if it appears in a message). */
{ HDR_OBJ_PATH, "Object Path" }, /* The object to send a call to, or the object a signal
is emitted from. */
{ HDR_INTERFACE, "Interface" }, /* The interface to invoke a method call on, or that a
signal is emitted from. Optional for method calls,
required for signals. */
{ HDR_MEMBER, "Member" }, /* The member, either the method name or signal name. */
{ HDR_ERROR_NAME, "Error Name" }, /* The name of the error that occurred, for errors. */
{ HDR_REPLY_SERIAL, "Reply Serial" }, /* The serial number of the message this message is a reply to. */
{ HDR_DESTINATION, "Destination" }, /* The name of the connection this message is intended for. */
{ HDR_SENDER, "Sender" }, /* Unique name of the sending connection. */
{ HDR_SIGNATURE, "Signature" }, /* The signature of the message body. */
{ HDR_HANDLES, "Handles" }, /* The number of handles (Unix file descriptors) that
accompany the message. */
{ HDR_TIMESTAMP, "Time stamp" },
{ HDR_TIME_TO_LIVE, "Time to live" },
{ HDR_COMPRESSION_TOKEN, "Compression token" },
{ HDR_SESSION_ID, "Session ID" },
{ 0, NULL }
};
/* This is used to round up offsets into a packet to an even two byte
* boundary from starting_offset.
* @param current_offset is the current offset into the packet.
* @param starting_offset is offset into the packet from the beginning of
* the message.
* @returns the offset rounded up to the next even two byte boundary from
start of the message.
*/
static gint round_to_2byte(gint current_offset,
gint starting_offset)
{
gint length = current_offset - starting_offset;
return starting_offset + ROUND_TO_2BYTE(length);
}
/* This is used to round up offsets into a packet to an even four byte
* boundary from starting_offset.
* @param current_offset is the current offset into the packet.
* @param starting_offset is offset into the packet from the beginning of
* the message.
* @returns the offset rounded up to the next even four byte boundary from
start of the message.
*/
static gint round_to_4byte(gint current_offset,
gint starting_offset)
{
gint length = current_offset - starting_offset;
return starting_offset + ROUND_TO_4BYTE(length);
}
/* This is used to round up offsets into a packet to an even eight byte
* boundary from starting_offset.
* @param current_offset is the current offset into the packet.
* @param starting_offset is offset into the packet from the beginning of
* the message.
* @returns the offset rounded up to the next even eight byte boundary from
start of the message.
*/
static gint round_to_8byte(gint current_offset,
gint starting_offset)
{
gint length = current_offset - starting_offset;
return starting_offset + ROUND_TO_8BYTE(length);
}
/* This is the maximum number of rounding bytes that is ever used.
* This define is used for error checking. */
#define MAX_ROUND_TO_BYTES 7
/* Gets a 32-bit unsigned integer from the packet buffer with
* the proper byte-swap.
* @param tvb is the incoming network data buffer.
* @param offset is the offset into the buffer.
* @param encoding is ENC_BIG_ENDIAN or ENC_LITTLE_ENDIAN.
* @return The 32-bit unsigned int interpretation of the bits
* in the buffer.
*/
static guint32
get_uint32(tvbuff_t *tvb,
gint32 offset,
gint encoding)
{
return (ENC_BIG_ENDIAN == encoding) ?
tvb_get_ntohl(tvb, offset) :
tvb_get_letohl(tvb, offset);
}
/* This is called by dissect_AllJoyn_message() to handle the initial byte for
* a connect message.
* If it was the initial byte for a connect message and was handled then return
* the number of bytes consumed out of the packet. If not an connect initial
* byte message or unhandled return 0.
* @param tvb is the incoming network data buffer.
* @param pinfo contains information about the incoming packet which
* we update as we dissect the packet.
* @param offset is the offset into the packet to check for the connect message.
* @param message_tree is the subtree that any connect data items should be added to.
* @returns the offset into the packet that has successfully been handled or
* the input offset value if it was not the connect initial byte of 0.
*/
static gint
handle_message_connect(tvbuff_t *tvb,
packet_info *pinfo,
gint offset,
proto_tree *message_tree)
{
guint8 the_one_byte;
the_one_byte = tvb_get_guint8(tvb, offset);
if(0 == the_one_byte) {
col_set_str(pinfo->cinfo, COL_INFO, "CONNECT-initial byte");
/* Now add the value as a subtree to the initial byte. */
proto_tree_add_item(message_tree, hf_alljoyn_connect_byte_value, tvb, offset, 1, ENC_NA);
offset += 1;
}
return offset;
}
typedef struct _sasl_cmd
{
const gchar *text;
guint length;
} sasl_cmd;
static const gchar CMD_AUTH[] = "AUTH";
static const gchar CMD_CANCEL[] = "CANCEL";
static const gchar CMD_BEGIN[] = "BEGIN";
static const gchar CMD_DATA[] = "DATA";
static const gchar CMD_ERROR[] = "ERROR";
static const gchar CMD_REJECTED[] = "REJECTED";
static const gchar CMD_OK[] = "OK";
#define MAX_SASL_COMMAND_LENGTH sizeof(CMD_REJECTED)
/* The 256 is just something I pulled out of the air. */
#define MAX_SASL_PACKET_LENGTH (MAX_SASL_COMMAND_LENGTH + 256)
static const sasl_cmd sasl_commands[] = {
{CMD_AUTH, G_N_ELEMENTS(CMD_AUTH) - 1},
{CMD_CANCEL, G_N_ELEMENTS(CMD_CANCEL) - 1},
{CMD_BEGIN, G_N_ELEMENTS(CMD_BEGIN) - 1},
{CMD_DATA, G_N_ELEMENTS(CMD_DATA) - 1},
{CMD_ERROR, G_N_ELEMENTS(CMD_ERROR) - 1},
{CMD_REJECTED, G_N_ELEMENTS(CMD_REJECTED) - 1},
{CMD_OK, G_N_ELEMENTS(CMD_OK) - 1},
};
static const gint sasl_commands_count = G_N_ELEMENTS(sasl_commands);
static const sasl_cmd *
find_sasl_command(tvbuff_t *tvb,
gint offset)
{
gint command_index;
for(command_index = 0; command_index < sasl_commands_count; command_index++) {
const sasl_cmd *cmd;
cmd = &sasl_commands[command_index];
if(0 == tvb_strneql(tvb, offset, cmd->text, cmd->length)) {
return cmd;
}
}
return NULL;
}
/* Call this to test whether desegmentation is possible and if so correctly
* set the pinfo structure with the applicable data.
* @param pinfo contains information about the incoming packet.
* @param next_offset is the offset into the tvbuff where it is desired to start processing next time.
* @param addition_bytes_needed is the additional bytes required beyond what is already available.
* @returns TRUE if desegmentation is possible. FALSE if not.
*/
static gboolean set_pinfo_desegment(packet_info *pinfo, gint next_offset, gint addition_bytes_needed)
{
if(pinfo->can_desegment) {
pinfo->desegment_offset = next_offset;
pinfo->desegment_len = addition_bytes_needed;
return TRUE;
}
return FALSE;
}
/* This is called by dissect_AllJoyn_message() to handle SASL messages.
* If it was a SASL message and was handled then return the number of bytes
* used (should be the entire packet). If not a SASL message or unhandled return 0.
* If more bytes are needed then return the negative of the bytes expected.
* @param tvb is the incoming network data buffer.
* @param pinfo contains information about the incoming packet which
* we update as we dissect the packet.
* @param offset is the offset into the packet to start processing.
* @param message_tree is the subtree that any connect data items should be added to.
* @returns the offset into the packet that has successfully been handled or
* the input offset value if it was not a sasl message.
*/
static gint
handle_message_sasl(tvbuff_t *tvb,
packet_info *pinfo,
gint offset,
proto_tree *message_tree)
{
gint return_value = offset;
const sasl_cmd *command;
command = find_sasl_command(tvb, offset);
if(command) {
/* This gives us the offset into the buffer of the terminating character of
* the command, the '\n'. + 1 to get the number of bytes used for the
* command in the buffer. tvb_find_guint8() returns -1 if not found so the + 1
* will result in a newline_offset of 0 if not found.
*/
gint newline_offset = tvb_find_guint8(tvb, offset + command->length, -1, '\n') + 1;
/* If not found see if we should request another segment. */
if(0 == newline_offset) {
if((guint)tvb_captured_length_remaining(tvb, offset) < MAX_SASL_PACKET_LENGTH &&
set_pinfo_desegment(pinfo, offset, DESEGMENT_ONE_MORE_SEGMENT)) {
/* Return the length of the buffer we successfully parsed. */
return_value = offset + command->length;
} else {
/* If we can't desegment then return 0 meaning we didn't do anything. */
return_value = 0;
}
return return_value;
}
if(newline_offset > 0) {
gint length = command->length;
col_add_fstr(pinfo->cinfo, COL_INFO, "SASL-%s", command->text);
/* Add a subtree/row for the command. */
proto_tree_add_item(message_tree, hf_alljoyn_sasl_command, tvb, offset, length, ENC_ASCII|ENC_NA);
offset += length;
length = newline_offset - offset;
/* Add a subtree for the parameter. */
proto_tree_add_item(message_tree, hf_alljoyn_sasl_parameter, tvb, offset, length, ENC_ASCII|ENC_NA);
return_value = newline_offset;
}
}
return return_value;
}
#define ENC_ALLJOYN_BAD_ENCODING 0xBADF00D
#define ENDIANNESS_OFFSET 0 /* The offset for endianness is always 0. */
/* This is called by handle_message_header_body() to get the endianness from
* message headers.
* @param tvb is the incoming network data buffer.
* @param offset is the current offset into network data buffer.
* @return The type of encoding, ENC_LITTLE_ENDIAN or ENC_BIG_ENDIAN, for
* the message.
*/
static guint32
get_message_header_endianness(tvbuff_t *tvb,
gint offset)
{
guint8 endianness;
guint encoding;
/* The endianness field. */
endianness = tvb_get_guint8(tvb, offset + ENDIANNESS_OFFSET);
switch(endianness)
{
case 'l':
encoding = ENC_LITTLE_ENDIAN;
break;
case 'B':
encoding = ENC_BIG_ENDIAN;
break;
default:
encoding = ENC_ALLJOYN_BAD_ENCODING;
break;
}
return encoding;
}
/* This is called by handle_message_field() to handle bytes of particular values
* in messages.
* @param tvb is the incoming network data buffer.
* @param offset is the offset into the packet to start processing.
* @param field_tree is the subtree that we connect data items to.
* @param expected_value is the value the byte is expected to have.
*/
static void
handle_message_header_expected_byte(tvbuff_t *tvb,
gint offset,
proto_tree *field_tree,
guint8 expected_value)
{
proto_item *item;
guint8 byte_value;
item = proto_tree_add_item(field_tree, hf_alljoyn_uint8, tvb, offset, 1, ENC_NA);
byte_value = tvb_get_guint8(tvb, offset);
if(expected_value == byte_value) {
proto_item_set_text(item, "0x%02x byte", expected_value);
} else {
proto_item_set_text(item, "Expected '0x%02x byte' but found '0x%02x'", expected_value, byte_value);
}
}
/*
* Message argument types
*/
#define ARG_INVALID '\0'
#define ARG_ARRAY 'a' /* AllJoyn array container type */
#define ARG_BOOLEAN 'b' /* AllJoyn boolean basic type */
#define ARG_DOUBLE 'd' /* AllJoyn IEEE 754 double basic type */
#define ARG_SIGNATURE 'g' /* AllJoyn signature basic type */
#define ARG_HANDLE 'h' /* AllJoyn socket handle basic type */
#define ARG_INT32 'i' /* AllJoyn 32-bit signed integer basic type */
#define ARG_INT16 'n' /* AllJoyn 16-bit signed integer basic type */
#define ARG_OBJ_PATH 'o' /* AllJoyn Name of an AllJoyn object instance basic type */
#define ARG_UINT16 'q' /* AllJoyn 16-bit unsigned integer basic type */
#define ARG_STRING 's' /* AllJoyn UTF-8 NULL terminated string basic type */
#define ARG_UINT64 't' /* AllJoyn 64-bit unsigned integer basic type */
#define ARG_UINT32 'u' /* AllJoyn 32-bit unsigned integer basic type */
#define ARG_VARIANT 'v' /* AllJoyn variant container type */
#define ARG_INT64 'x' /* AllJoyn 64-bit signed integer basic type */
#define ARG_BYTE 'y' /* AllJoyn 8-bit unsigned integer basic type */
#define ARG_STRUCT '(' /* AllJoyn struct container type */
#define ARG_DICT_ENTRY '{' /* AllJoyn dictionary or map container type - an array of key-value pairs */
static gint
pad_according_to_type(gint offset, gint field_starting_offset, gint max_offset, guint8 type)
{
switch(type)
{
case ARG_BYTE:
break;
case ARG_DOUBLE:
case ARG_UINT64:
case ARG_INT64:
case ARG_STRUCT:
case ARG_DICT_ENTRY:
offset = round_to_8byte(offset, field_starting_offset);
break;
case ARG_SIGNATURE:
break;
case ARG_HANDLE:
break;
case ARG_INT32:
case ARG_UINT32:
case ARG_BOOLEAN:
offset = round_to_4byte(offset, field_starting_offset);
break;
case ARG_INT16:
case ARG_UINT16:
offset = round_to_2byte(offset, field_starting_offset);
break;
case ARG_STRING:
break;
case ARG_VARIANT:
break;
case ARG_OBJ_PATH:
break;
default:
break;
}
if(offset > max_offset) {
offset = max_offset;
}
return offset;
}
/* This is called by parse_arg to append the signature of structure or dictionary
* to an item. This is complicated a bit by the fact that structures can be nested.
* @param item is the item to append the signature data to.
* @param signature points to the signature to be appended.
* @param signature_max_length is the specified maximum length of this signature.
* @param type_stop is the character when indicates the end of the signature.
*/
static void
append_struct_signature(proto_item *item,
guint8 *signature,
gint signature_max_length,
const guint8 type_stop)
{
int depth = 0;
guint8 type_start;
gint signature_length = 0;
proto_item_append_text(item, "%c", ' ');
type_start = *signature;
do {
if(type_start == *signature) {
depth++;
}
if(type_stop == *signature) {
depth--;
}
proto_item_append_text(item, "%c", *signature++);
} while(depth > 0 && ++signature_length < signature_max_length);
if(signature_length >= signature_max_length) {
proto_item_append_text(item, "... Invalid signature!");
}
}
/* This is called to advance the signature pointer to the end of the signature
* it is currently pointing at. signature_length is decreased by the appropriate
* amount before returning.
* @param signature is a pointer to the signature. It could be simple data type
* such as 'i', 'b', etc. In these cases *signature is advanced by 1 and
* *signature_length is decreased by 1. Or it could be an array, structure, dictionary,
* array of arrays or even more complex things. In these cases the advancement could
* be much larger. For example with the signature "a(bdas)i" *signature will be advanced
* to the 'i' and *signature_length will be set to '1'.
* @param signature_length is a pointer to the length of the signature.
*/
static void
advance_to_end_of_signature(guint8 **signature,
guint8 *signature_length)
{
gboolean done = FALSE;
gint8 current_type;
gint8 end_type = ARG_INVALID;
while(*(++(*signature)) && --(*signature_length) > 0 && !done) {
current_type = **signature;
/* Were we looking for the end of a structure or dictionary? If so, did we find it? */
if(end_type != ARG_INVALID) {
if(end_type == current_type) {
done = TRUE; /* Found the end of the structure or dictionary. All done. */
}
continue;
}
switch(current_type)
{
case ARG_ARRAY:
advance_to_end_of_signature(signature, signature_length);
break;
case ARG_STRUCT:
end_type = ')';
advance_to_end_of_signature(signature, signature_length);
break;
case ARG_DICT_ENTRY:
end_type = '}';
advance_to_end_of_signature(signature, signature_length);
break;
case ARG_BYTE:
case ARG_DOUBLE:
case ARG_UINT64:
case ARG_INT64:
case ARG_SIGNATURE:
case ARG_HANDLE:
case ARG_INT32:
case ARG_UINT32:
case ARG_BOOLEAN:
case ARG_INT16:
case ARG_UINT16:
case ARG_STRING:
case ARG_VARIANT:
case ARG_OBJ_PATH:
done = TRUE;
break;
default: /* Unrecognized signature. Bail out. */
done = TRUE;
break;
}
}
}
/* This is called to add a padding item. There is not padding done for each call made.
* There is testing for the padding length which must be greater than zero. It's also possible,
* in the case of bad packets, that the end of the padding is wrong so range checking is
* also done. In the case of something being obviously wrong this function returns
* without adding the padding item.
* @param padding_start is the offset into tvb at which the (possible) padding starts.
* @param padding_end is the offset into tvb at which the (possible) padding ends.
* @param tvb is the incoming network data buffer.
* @param tree is the tree to which the new item should be attached.
*/
static void add_padding_item(gint padding_start, gint padding_end, tvbuff_t *tvb, proto_tree *tree)
{
if(padding_end > padding_start && padding_end < (gint)tvb_reported_length(tvb)) {
gint padding_length = padding_end - padding_start;
if (padding_length <= MAX_ROUND_TO_BYTES) {
proto_tree_add_item(tree, hf_padding, tvb, padding_start, padding_length, ENC_NA);
}
}
}
/* This is called to handle a single typed argument. Recursion is used
* to handle arrays and structures.
* @param tvb is the incoming network data buffer.
* @param pinfo contains information about the incoming packet which
* we update as we dissect the packet.
* @param header_item, if not NULL, is appended with the text name of the data type.
* @param encoding indicates big (ENC_BIG_ENDIAN) or little (ENC_LITTLE_ENDIAN)
* @param offset is the offset into tvb to get the field from.
* @param field_tree is the tree to which this argument should be attached.
* @param is_reply_to, if TRUE, means this uint32 value should be used to update
* header_item and pinfo->cinfo with a special message.
* @param type_id is the type of this argument.
* @param field_code is the type of header, or HDR_INVALID if not used, which this
* arg is a part of. If field_code is HDR_MEMBER or HDR_SIGNATURE then
* pinfo->cinfo is updated with information.
* @param signature is a pointer to the signature of the parameters. If type_id is
* ARG_SIGNATURE this is a return value for the caller to pass to the function
* that parses the parameters. If type_id is something like ARG_STRUCT then it points
* to the actual signature of the type.
* @param signature_length is a pointer to the length of the signature and if type_id is
* ARG_SIGNATURE this is a return value for the caller to pass to the function
* that parses the parameters.
* @param field_starting_offset is the offset at the beginning of the field that contains
* this arg. When rounding this starting_offset is used rather than the absolute offset.
* @return The new offset into the buffer after removing the field code and value.
* the message or the packet length to stop further processing if "really bad"
* parameters come in.
*/
static gint
parse_arg(tvbuff_t *tvb,
packet_info *pinfo,
proto_item *header_item,
guint encoding,
gint offset,
proto_tree *field_tree,
gboolean is_reply_to,
guint8 type_id,
guint8 field_code,
guint8 **signature,
guint8 *signature_length,
gint field_starting_offset)
{
gint length;
gint padding_start;
gint saved_offset = offset;
const gchar *header_type_name = NULL;
switch(type_id)
{
case ARG_INVALID:
header_type_name = "invalid";
offset = round_to_8byte(offset + 1, field_starting_offset);
break;
case ARG_ARRAY: /* AllJoyn array container type */
{
static gchar bad_array_format[] = "BAD DATA: Array length (in bytes) is %d. Remaining packet length is %d.";
proto_item *item;
proto_tree *tree;
guint8 *sig_saved;
gint starting_offset;
gint number_of_items = 0;
guint8 remaining_sig_length = *signature_length;
gint packet_length = (gint)tvb_reported_length(tvb);
header_type_name = "array";
if(*signature == NULL || *signature_length < 1) {
col_add_fstr(pinfo->cinfo, COL_INFO, "BAD DATA: A %s argument needs a signature.", header_type_name);
return tvb_reported_length(tvb);
}
/* *sig_saved will now be the element type after the 'a'. */
sig_saved = (*signature) + 1;
padding_start = offset;
offset = round_to_4byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
/* This is the length of the entire array in bytes but does not include the length field. */
length = (gint)get_uint32(tvb, offset, encoding);
padding_start = offset + 4;
starting_offset = pad_according_to_type(padding_start, field_starting_offset, packet_length, *sig_saved); /* Advance to the data elements. */
if(length < 0 || length > MAX_ARRAY_LEN || starting_offset + length > packet_length) {
col_add_fstr(pinfo->cinfo, COL_INFO, bad_array_format, length, tvb_reported_length_remaining(tvb, starting_offset));
return tvb_reported_length(tvb);
}
/* This item is the entire array including the length specifier plus any pad bytes. */
item = proto_tree_add_item(field_tree, hf_alljoyn_mess_body_array, tvb, offset, (starting_offset-offset) + length, encoding);
tree = proto_item_add_subtree(item, ett_alljoyn_mess_body_parameters);
offset = starting_offset;
add_padding_item(padding_start, offset, tvb, tree);
if(0 == length) {
advance_to_end_of_signature(signature, &remaining_sig_length);
} else {
while((offset - starting_offset) < length) {
guint8 *sig_pointer;
number_of_items++;
sig_pointer = sig_saved;
remaining_sig_length = *signature_length - 1;
offset = parse_arg(tvb,
pinfo,
header_item,
encoding,
offset,
tree,
is_reply_to,
*sig_pointer,
field_code,
&sig_pointer,
&remaining_sig_length,
field_starting_offset);
/* Set the signature pointer to be just past the type just handled. */
*signature = sig_pointer;
}
}
*signature_length = remaining_sig_length;
if(item) {
proto_item_append_text(item, " of %d '%c' elements", number_of_items, *sig_saved);
}
}
break;
case ARG_BOOLEAN: /* AllJoyn boolean basic type */
header_type_name = "boolean";
padding_start = offset;
offset = round_to_4byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
proto_tree_add_item(field_tree, hf_alljoyn_boolean, tvb, offset, 4, encoding);
offset += 4;
break;
case ARG_DOUBLE: /* AllJoyn IEEE 754 double basic type */
header_type_name = "IEEE 754 double";
padding_start = offset;
offset = round_to_8byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
proto_tree_add_item(field_tree, hf_alljoyn_double, tvb, offset, 8, encoding);
offset += 8;
break;
case ARG_SIGNATURE: /* AllJoyn signature basic type */
header_type_name = "signature";
*signature_length = tvb_get_guint8(tvb, offset);
if(*signature_length + 2 > tvb_reported_length_remaining(tvb, offset)) {
gint bytes_left = tvb_reported_length_remaining(tvb, offset);
col_add_fstr(pinfo->cinfo, COL_INFO, "BAD DATA: Signature length is %d. Only %d bytes left in packet.",
(gint)(*signature_length), bytes_left);
return tvb_reported_length(tvb);
}
/* Include the terminating '/0'. */
length = *signature_length + 1;
proto_tree_add_item(field_tree, hf_alljoyn_mess_body_signature_length, tvb, offset, 1, encoding);
offset += 1;
proto_tree_add_item(field_tree, hf_alljoyn_mess_body_signature, tvb, offset, length, ENC_ASCII|ENC_NA);
*signature = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, length, ENC_ASCII);
if(HDR_SIGNATURE == field_code) {
col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", *signature);
}
offset += length;
break;
case ARG_HANDLE: /* AllJoyn socket handle basic type. */
header_type_name = "socket handle";
padding_start = offset;
offset = round_to_4byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
proto_tree_add_item(field_tree, hf_alljoyn_handle, tvb, offset, 4, encoding);
offset += 4;
break;
case ARG_INT32: /* AllJoyn 32-bit signed integer basic type. */
header_type_name = "int32";
padding_start = offset;
offset = round_to_4byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
proto_tree_add_item(field_tree, hf_alljoyn_int32, tvb, offset, 4, encoding);
offset += 4;
break;
case ARG_INT16: /* AllJoyn 16-bit signed integer basic type. */
header_type_name = "int16";
padding_start = offset;
offset = round_to_2byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
proto_tree_add_item(field_tree, hf_alljoyn_int16, tvb, offset, 2, encoding);
offset += 2;
break;
case ARG_OBJ_PATH: /* AllJoyn Name of an AllJoyn object instance basic type */
header_type_name = "object path";
length = get_uint32(tvb, offset, encoding) + 1;
/* The + 4 is for the length specifier. Object paths may be of "any length"
according to D-Bus spec. But there are practical limits. */
if(length < 0 || length > MAX_ARRAY_LEN || length + 4 > tvb_reported_length_remaining(tvb, offset)) {
col_add_fstr(pinfo->cinfo, COL_INFO, "BAD DATA: Object path length is %d. Only %d bytes left in packet.",
length, tvb_reported_length_remaining(tvb, offset + 4));
return tvb_reported_length(tvb);
}
proto_tree_add_item(field_tree, hf_alljoyn_uint32, tvb, offset, 4, encoding);
offset += 4;
proto_tree_add_item(field_tree, hf_alljoyn_string_data, tvb, offset, length, ENC_ASCII|ENC_NA);
offset += length;
break;
case ARG_UINT16: /* AllJoyn 16-bit unsigned integer basic type */
header_type_name = "uint16";
padding_start = offset;
offset = round_to_2byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
proto_tree_add_item(field_tree, hf_alljoyn_uint16, tvb, offset, 2, encoding);
offset += 2;
break;
case ARG_STRING: /* AllJoyn UTF-8 NULL terminated string basic type */
header_type_name = "string";
padding_start = offset;
offset = round_to_4byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
proto_tree_add_item(field_tree, hf_alljoyn_string_size_32bit, tvb, offset, 4, encoding);
/* Get the length so we can display the string. */
length = (gint)get_uint32(tvb, offset, encoding);
if(length < 0 || length > tvb_reported_length_remaining(tvb, offset)) {
col_add_fstr(pinfo->cinfo, COL_INFO, "BAD DATA: String length is %d. Remaining packet length is %d.",
length, (gint)tvb_reported_length_remaining(tvb, offset));
return tvb_reported_length(tvb);
}
length += 1; /* Include the '\0'. */
offset += 4;
proto_tree_add_item(field_tree, hf_alljoyn_string_data, tvb, offset, length, ENC_UTF_8|ENC_NA);
if(HDR_MEMBER == field_code) {
guint8 *member_name;
member_name = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, length, ENC_UTF_8);
col_append_fstr(pinfo->cinfo, COL_INFO, " %s", member_name);
}
offset += length;
break;
case ARG_UINT64: /* AllJoyn 64-bit unsigned integer basic type */
header_type_name = "uint64";
padding_start = offset;
offset = round_to_8byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
proto_tree_add_item(field_tree, hf_alljoyn_uint64, tvb, offset, 8, encoding);
offset += 8;
break;
case ARG_UINT32: /* AllJoyn 32-bit unsigned integer basic type */
header_type_name = "uint32";
padding_start = offset;
offset = round_to_4byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
if(is_reply_to) {
static const gchar format[] = " Replies to: %09u";
guint32 replies_to;
replies_to = get_uint32(tvb, offset, encoding);
col_append_fstr(pinfo->cinfo, COL_INFO, format, replies_to);
if(header_item) {
proto_item *item;
item = proto_tree_add_item(field_tree, hf_alljoyn_uint32, tvb, offset, 4, encoding);
proto_item_set_text(item, format + 1, replies_to);
}
} else {
proto_tree_add_item(field_tree, hf_alljoyn_uint32, tvb, offset, 4, encoding);
}
offset += 4;
break;
case ARG_VARIANT: /* AllJoyn variant container type */
{
proto_item *item;
proto_tree *tree;
guint8 *sig_saved;
guint8 *sig_pointer;
guint8 variant_sig_length;
header_type_name = "variant";
variant_sig_length = tvb_get_guint8(tvb, offset);
length = variant_sig_length;
if(length > tvb_reported_length_remaining(tvb, offset)) {
gint bytes_left = tvb_reported_length_remaining(tvb, offset);
col_add_fstr(pinfo->cinfo, COL_INFO, "BAD DATA: Variant signature length is %d. Only %d bytes left in packet.",
length, bytes_left);
offset = tvb_reported_length(tvb);
}
length += 1; /* Include the terminating '\0'. */
/* This length (4) will be updated later with the length of the entire variant object. */
item = proto_tree_add_item(field_tree, hf_alljoyn_mess_body_variant, tvb, offset, 4, encoding);
tree = proto_item_add_subtree(item, ett_alljoyn_mess_body_parameters);
proto_tree_add_item(tree, hf_alljoyn_mess_body_signature_length, tvb, offset, 1, encoding);
offset += 1;
tree = proto_item_add_subtree(item, ett_alljoyn_mess_body_parameters);
proto_tree_add_item(tree, hf_alljoyn_mess_body_signature, tvb, offset, length, ENC_ASCII|ENC_NA);
sig_saved = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, length, ENC_ASCII);
offset += length;
sig_pointer = sig_saved;
/* The signature of the variant has now been taken care of. So now take care of the variant data. */
while(((sig_pointer - sig_saved) < (length - 1)) && (tvb_reported_length_remaining(tvb, offset) > 0)) {
proto_item_append_text(item, "%c", *sig_pointer);
offset = parse_arg(tvb, pinfo, header_item, encoding, offset, tree, is_reply_to,
*sig_pointer, field_code, &sig_pointer, &variant_sig_length, field_starting_offset);
}
proto_item_append_text(item, "'");
proto_item_set_end(item, tvb, offset);
}
break;
case ARG_INT64: /* AllJoyn 64-bit signed integer basic type */
header_type_name = "int64";
padding_start = offset;
offset = round_to_8byte(offset, field_starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
proto_tree_add_item(field_tree, hf_alljoyn_int64, tvb, offset, 8, encoding);
offset += 8;
break;
case ARG_BYTE: /* AllJoyn 8-bit unsigned integer basic type */
header_type_name = "byte";
proto_tree_add_item(field_tree, hf_alljoyn_uint8, tvb, offset, 1, encoding);
offset += 1;
break;
case ARG_DICT_ENTRY: /* AllJoyn dictionary or map container type - an array of key-value pairs */
case ARG_STRUCT: /* AllJoyn struct container type */
{
proto_item *item;
proto_tree *tree;
int hf;
guint8 type_stop;
if(type_id == ARG_STRUCT) {
header_type_name = "structure";
hf = hf_alljoyn_mess_body_structure;
type_stop = ')';
} else {
header_type_name = "dictionary";
hf = hf_alljoyn_mess_body_dictionary_entry;
type_stop = '}';
}
if(*signature == NULL || *signature_length < 1) {
col_add_fstr(pinfo->cinfo, COL_INFO, "BAD DATA: A %s argument needs a signature.", header_type_name);
return tvb_reported_length(tvb);
}
/* This length (4) will be updated later with the length of the entire struct. */
item = proto_tree_add_item(field_tree, hf, tvb, offset, 4, encoding);
append_struct_signature(item, *signature, *signature_length, type_stop);
tree = proto_item_add_subtree(item, ett_alljoyn_mess_body_parameters);
padding_start = offset;
offset = pad_according_to_type(offset, field_starting_offset, tvb_reported_length(tvb), type_id);
add_padding_item(padding_start, offset, tvb, tree);
(*signature)++; /* Advance past the '(' or '{'. */
(*signature_length)--;
/* *signature should never be NULL but just make sure to avoid potential issues. */
while(*signature && **signature && **signature != type_stop
&& tvb_reported_length_remaining(tvb, offset) > 0) {
offset = parse_arg(tvb,
pinfo,
header_item,
encoding,
offset,
tree,
is_reply_to,
**signature,
field_code,
signature,
signature_length,
field_starting_offset);
}
proto_item_set_end(item, tvb, offset);
}
break;
default:
header_type_name = "unexpected";
/* Just say we are done with this packet. */
offset = tvb_reported_length(tvb);
break;
}
if(*signature && ARG_ARRAY != type_id && HDR_INVALID == field_code) {
(*signature)++;
(*signature_length)--;
}
if(NULL != header_item && NULL != header_type_name) {
/* Using "%s" and the argument "header_type_name" because some compilers don't like
"header_type_name" by itself. */
proto_item_append_text(header_item, "%s", header_type_name);
}
/* Make sure we never return something longer than the buffer for an offset. */
if(offset > (gint)tvb_reported_length(tvb)) {
offset = (gint)tvb_reported_length(tvb);
} else if (offset == saved_offset) {
/* The argument has a null size. Let's report the packet length to avoid an infinite loop. */
/*expert_add_info(pinfo, header_item, &ei_alljoyn_empty_arg);*/
proto_tree_add_expert(field_tree, pinfo, &ei_alljoyn_empty_arg, tvb, offset, 0);
offset = (gint)tvb_reported_length(tvb);
}
return offset;
}
static void
alljoyn_typeid( gchar *result, guint32 type )
{
g_snprintf( result, ITEM_LABEL_LENGTH, "'%c' => ", type);
}
/* This is called by handle_message_header_fields() to handle a single
* message header field.
* @param tvb is the incoming network data buffer.
* @param pinfo contains information about the incoming packet which
* we update as we dissect the packet.
* @param header_item is the subtree that we connect data items to.
* @param encoding indicates big (ENC_BIG_ENDIAN) or little (ENC_LITTLE_ENDIAN)
* @param offset is the offset into tvb to get the field from.
* endianness.
* @param signature pointer to the signature of the parameters. This is a return
* value for the caller to pass to the function that parses the parameters.
* @param signature_length pointer to the length of the signature. This is a return
* value for the caller to pass to the function that parses the parameters.
* @return The new offset into the buffer after removing the field code and value.
* the message.
*/
static gint
handle_message_field(tvbuff_t *tvb,
packet_info *pinfo,
proto_item *header_tree,
guint encoding,
gint offset,
guint8 **signature,
guint8 *signature_length)
{
proto_tree *field_tree;
proto_item *item, *field_item;
guint8 field_code;
guint8 type_id;
gboolean is_reply_to = FALSE;
gint starting_offset = offset;
gint padding_start;
field_code = tvb_get_guint8(tvb, offset);
if(HDR_REPLY_SERIAL == field_code) {
is_reply_to = TRUE;
}
field_item = proto_tree_add_item(header_tree, hf_alljoyn_mess_header_field, tvb, offset, 1, ENC_NA);
field_tree = proto_item_add_subtree(field_item, ett_alljoyn_mess_header_field);
proto_tree_add_item(field_tree, hf_alljoyn_mess_body_header_fieldcode, tvb, offset, 1, ENC_NA);
offset += 1;
/* We expect a byte of 0x01 here. */
handle_message_header_expected_byte(tvb, offset, field_tree, 0x01);
offset += 1;
item = proto_tree_add_item(field_tree, hf_alljoyn_mess_body_header_typeid, tvb, offset, 1, ENC_NA);
type_id = tvb_get_guint8(tvb, offset);
offset += 1;
/* We expect a byte of 0x00 here. */
handle_message_header_expected_byte(tvb, offset, field_tree, 0x00);
offset += 1;
offset = parse_arg(tvb,
pinfo,
item,
encoding,
offset,
field_tree,
is_reply_to,
type_id,
field_code,
signature,
signature_length,
starting_offset);
padding_start = offset;
offset = round_to_8byte(offset, starting_offset);
add_padding_item(padding_start, offset, tvb, field_tree);
if(offset < 0 || offset > (gint)tvb_reported_length(tvb)) {
offset = (gint)tvb_reported_length(tvb);
}
proto_item_set_end(field_tree, tvb, offset);
return offset;
}
/* This is called by handle_message() to handle the message body.
* @param tvb is the incoming network data buffer.
* @param pinfo contains information about the incoming packet which
* we update as we dissect the packet.
* @param header_tree is the subtree that we connect data items to.
* @param encoding indicates big (ENC_BIG_ENDIAN) or little (ENC_LITTLE_ENDIAN)
* @param offset contains the offset into tvb for the start of the header fields.
* @param header_length contains the length of the message fields.
* @param signature_length contains the signature field length.
*/
static guint8 *
handle_message_header_fields(tvbuff_t *tvb,
packet_info *pinfo,
proto_item *header_tree,
guint encoding,
gint offset,
guint32 header_length,
guint8 *signature_length)
{
gint end_of_header;
proto_item *item;
proto_tree *tree;
guint8 *signature = NULL;
item = proto_tree_add_item(header_tree, hf_alljoyn_mess_header_fields, tvb, offset, header_length, ENC_NA);
tree = proto_item_add_subtree(item, ett_alljoyn_mess_header);
end_of_header = offset + header_length;
while(offset < end_of_header) {
offset = handle_message_field(tvb, pinfo, tree, encoding, offset, &signature, signature_length);
}
return signature;
}
/* This is called by handle_message() to handle the message body.
* @param tvb is the incoming network data buffer.
* @param header_tree is the subtree that we connect data items to.
* @param encoding indicates big (ENC_BIG_ENDIAN) or little (ENC_LITTLE_ENDIAN)
* @param offset contains the offset into tvb for the start of the parameters.
* @param body_length contains the length of the body parameters.
* @param signature the signature of the parameters.
* @param signature_length contains the signature field length.
*/
static gint
handle_message_body_parameters(tvbuff_t *tvb,
packet_info *pinfo,
proto_tree *header_tree,
guint encoding,
gint offset,
gint32 body_length,
guint8 *signature,
guint8 signature_length)
{
gint packet_length, end_of_body;
proto_tree *tree;
proto_item *item;
const gint starting_offset = offset;
packet_length = tvb_reported_length(tvb);
/* Add a subtree/row for the message body parameters. */
item = proto_tree_add_item(header_tree, hf_alljoyn_mess_body_parameters, tvb, offset, body_length, ENC_NA);
tree = proto_item_add_subtree(item, ett_alljoyn_mess_body_parameters);
end_of_body = offset + body_length;
if(end_of_body > packet_length) {
end_of_body = packet_length;
}
while(offset < end_of_body && signature && *signature) {
offset = parse_arg(tvb,
pinfo,
NULL,
encoding,
offset,
tree, /* Add the args to the Parameters tree. */
FALSE,
*signature,
HDR_INVALID,
&signature,
&signature_length,
starting_offset);
}
return offset;
}
#define MESSAGE_HEADER_LENGTH 16
#define TYPE_OFFSET 1
#define FLAGS_OFFSET 2
#define MAJORVERSION_OFFSET 3
#define BODY_LENGTH_OFFSET 4
#define SERIAL_OFFSET 8
#define HEADER_LENGTH_OFFSET 12
/* This is called by dissect_AllJoyn_message() to handle the actual message.
* If it was a message with valid header and optional body then return TRUE.
* If not a valid message return false.
* @param tvb is the incoming network data buffer.
* @param pinfo contains information about the incoming packet.
* @param offset is the offset into the packet to start processing.
* @param message_tree is the subtree that any connect data items should be added to.
* @param is_ardp is true if this is an ARDP packet.
* @returns the offset into the packet that has successfully been handled or
* the input offset value if it was not a message header body.
*/
static gint
handle_message_header_body(tvbuff_t *tvb,
packet_info *pinfo,
gint offset,
proto_item *message_tree,
gboolean is_ardp)
{
gint remaining_packet_length;
guint8 *signature;
guint8 signature_length = 0;
proto_tree *header_tree, *flag_tree;
proto_item *header_item, *flag_item;
guint encoding;
gint packet_length_needed;
gint header_length = 0, body_length = 0;
remaining_packet_length = tvb_reported_length_remaining(tvb, offset);
encoding = get_message_header_endianness(tvb, offset);
if(ENC_ALLJOYN_BAD_ENCODING == encoding) {
col_add_fstr(pinfo->cinfo, COL_INFO, "BAD DATA: Endian encoding '0x%0x'. Expected 'l' or 'B'",
tvb_get_guint8(tvb, offset + ENDIANNESS_OFFSET));
/* We are done with everything in this packet don't try anymore. */
return offset + remaining_packet_length;
}
if(remaining_packet_length < MESSAGE_HEADER_LENGTH) {
if(!set_pinfo_desegment(pinfo, offset, MESSAGE_HEADER_LENGTH - remaining_packet_length)) {
col_add_fstr(pinfo->cinfo, COL_INFO, "BAD DATA: Remaining packet length is %d. Expected >= %d && <= %d",
remaining_packet_length, MESSAGE_HEADER_LENGTH, MAX_PACKET_LEN);
}
return offset + remaining_packet_length;
}
header_length = get_uint32(tvb, offset + HEADER_LENGTH_OFFSET, encoding);
body_length = get_uint32(tvb, offset + BODY_LENGTH_OFFSET, encoding);
packet_length_needed = ROUND_TO_8BYTE(header_length) + body_length + MESSAGE_HEADER_LENGTH;
/* ARDP (UDP) packets can't be desegmented by Wireshark and it is normal to see them in
* fragments. Don't scare the user when they occur. Dissect as much as we easily can.
* It should be possible to desegment TCIP packets. If not then something is wrong so tell
* the user.
*/
if(packet_length_needed > remaining_packet_length) {
if(!set_pinfo_desegment(pinfo, offset, packet_length_needed - remaining_packet_length)) {
if(!is_ardp) {
col_add_fstr(pinfo->cinfo, COL_INFO, "BAD DATA: Remaining packet length is %d. Expected %d",
remaining_packet_length, packet_length_needed);
return offset + remaining_packet_length;
}
/* In this case we can't desegment but it is an ARDP message so we want to dissect
* at least the header. Therefore we fall through to the header parsing code if the packet size
* is greater than or equal to the header size. Otherwise we return and report what we know.
*/
if (remaining_packet_length < header_length) {
col_add_fstr(pinfo->cinfo, COL_INFO, "Fragmented ARDP message: Remaining packet length is %d. Expected %d",
remaining_packet_length, packet_length_needed);
return offset + remaining_packet_length;
}
}
else {
/* In this case we can desegment */
return offset + remaining_packet_length;
}
}
/* Add a subtree/row for the header. */
header_item = proto_tree_add_item(message_tree, hf_alljoyn_mess_header, tvb, offset, MESSAGE_HEADER_LENGTH, ENC_NA);
header_tree = proto_item_add_subtree(header_item, ett_alljoyn_header);
proto_tree_add_item(header_tree, hf_alljoyn_mess_header_endian, tvb, offset + ENDIANNESS_OFFSET, 1, ENC_NA);
proto_tree_add_item(header_tree, hf_alljoyn_mess_header_type, tvb, offset + TYPE_OFFSET, 1, ENC_NA);
/* The flags byte. */
flag_item = proto_tree_add_item(header_tree, hf_alljoyn_mess_header_flags, tvb, offset + FLAGS_OFFSET, 1, ENC_NA);
flag_tree = proto_item_add_subtree(flag_item, ett_alljoyn_header_flags);
/* Now the individual bits. */
proto_tree_add_item(flag_tree, hf_alljoyn_mess_header_flags_encrypted, tvb, offset + FLAGS_OFFSET, 1, ENC_NA);
proto_tree_add_item(flag_tree, hf_alljoyn_mess_header_flags_compressed, tvb, offset + FLAGS_OFFSET, 1, ENC_NA);
proto_tree_add_item(flag_tree, hf_alljoyn_mess_header_flags_global_broadcast, tvb, offset + FLAGS_OFFSET, 1, ENC_NA);
proto_tree_add_item(flag_tree, hf_alljoyn_mess_header_flags_sessionless, tvb, offset + FLAGS_OFFSET, 1, ENC_NA);
proto_tree_add_item(flag_tree, hf_alljoyn_mess_header_flags_allow_remote_msg, tvb, offset + FLAGS_OFFSET, 1, ENC_NA);
proto_tree_add_item(flag_tree, hf_alljoyn_mess_header_flags_no_auto_start, tvb, offset + FLAGS_OFFSET, 1, ENC_NA);
proto_tree_add_item(flag_tree, hf_alljoyn_mess_header_flags_no_reply, tvb, offset + FLAGS_OFFSET, 1, ENC_NA);
proto_tree_add_item(header_tree, hf_alljoyn_mess_header_majorversion, tvb, offset + MAJORVERSION_OFFSET, 1, ENC_NA);
proto_tree_add_item(header_tree, hf_alljoyn_mess_header_body_length, tvb, offset + BODY_LENGTH_OFFSET, 4, encoding);
proto_tree_add_item(header_tree, hf_alljoyn_mess_header_serial, tvb, offset + SERIAL_OFFSET, 4, encoding);
col_add_fstr(pinfo->cinfo, COL_INFO, "Message %010u: '%s'", get_uint32(tvb, offset + SERIAL_OFFSET, encoding),
val_to_str_const(tvb_get_guint8(tvb, offset + TYPE_OFFSET), message_header_encoding_vals, "Unexpected message type"));
proto_tree_add_item(header_tree, hf_alljoyn_mess_header_header_length, tvb, offset + HEADER_LENGTH_OFFSET, 4, encoding);
offset += MESSAGE_HEADER_LENGTH;
packet_length_needed -= MESSAGE_HEADER_LENGTH;
signature = handle_message_header_fields(tvb, pinfo, message_tree, encoding,
offset, header_length, &signature_length);
/* No need to call add_padding_item() after the following operation. It's not needed
* because all message header fields widths are multiples of 8 and are padded as necessary.
* Because the padding is taken care of in the individual message header field there is no
* need for it here. The rounding here just gets the offset to the end of the last header
* field and its (possible) padding.
*/
offset += ROUND_TO_8BYTE(header_length);
packet_length_needed -= ROUND_TO_8BYTE(header_length);
remaining_packet_length = tvb_reported_length_remaining(tvb, offset);
if (packet_length_needed > remaining_packet_length) {
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Fragmented ARDP message or bad data: Remaining packet length is %d. Expected %d",
remaining_packet_length, packet_length_needed);
return offset + remaining_packet_length;
}
if(body_length > 0 && signature != NULL && signature_length > 0) {
offset = handle_message_body_parameters(tvb,
pinfo,
message_tree,
encoding,
offset,
body_length,
signature,
signature_length);
}
return offset;
}
/* Test to see if this buffer contains something that might be an AllJoyn message.
* @param tvb is the incoming network data buffer.
* @param offset where to start parsing the buffer.
* @param is_ardp If true then this is an ARDP packet which needs special treatment.
* @returns TRUE if probably an AllJoyn message.
* FALSE if probably not an AllJoyn message.
*/
static gboolean
protocol_is_alljoyn_message(tvbuff_t *tvb, gint offset, gboolean is_ardp)
{
gint length = tvb_captured_length(tvb);
if(length < offset + 1)
return FALSE;
/* There is no initial connect byte or SASL when using ARDP. */
if(!is_ardp) {
/* initial byte for a connect message. */
if(tvb_get_guint8(tvb, offset) == 0)
return TRUE;
if(find_sasl_command(tvb, offset) != NULL)
return TRUE;
}
if(get_message_header_endianness(tvb, offset) == ENC_ALLJOYN_BAD_ENCODING)
return FALSE;
if((length < offset + 2) || (try_val_to_str(tvb_get_guint8(tvb, offset + 1), message_header_encoding_vals) == NULL))
return FALSE;
return TRUE;
}
/* This is called by Wireshark for packet types that are registered
* in the proto_reg_handoff_AllJoyn() function. This function handles
* the packets for the traffic on port 9955.
* @param tvb is the incoming network data buffer.
* @param pinfo contains information about the incoming packet which
* we update as we dissect the packet.
* @param tree is the tree data items should be added to.
* @param offset is the offset into the already partial dissected buffer
* from dissect_AllJoyn_ardp() or 0 because this is just a bare
* AllJoyn message.
* @return 0 if not AllJoyn message protocol, or
* the offset into the buffer we have successfully dissected (which
* should normally be the packet length), or
* the offset into the buffer we have dissected with
* pinfo->desegment_len == additional bytes needed from the next packet
* before we can dissect, or
* 0 with pinfo->desegment_len == DESEGMENT_ONE_MORE_SEGMENT if another
* segment is needed, or
* packet_length if "really bad" parameters come in.
*/
static gint
dissect_AllJoyn_message(tvbuff_t *tvb,
packet_info *pinfo,
proto_tree *tree,
gint offset)
{
proto_item *message_item;
proto_tree *message_tree;
gint last_offset = -1;
gint packet_length;
gboolean is_ardp = FALSE;
/* If called after dissecting the ARDP protocol. This is the only time the offset will not be zero. */
if(offset != 0) {
is_ardp = TRUE;
}
pinfo->desegment_len = 0;
packet_length = tvb_reported_length(tvb);
col_clear(pinfo->cinfo, COL_INFO);
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ALLJOYN");
/* Add a subtree covering the remainder of the packet */
message_item = proto_tree_add_item(tree, proto_AllJoyn_mess, tvb, offset, -1, ENC_NA);
message_tree = proto_item_add_subtree(message_item, ett_alljoyn_mess);
/* Continue as long as we are making progress and we haven't finished with the packet. */
while(offset < packet_length && offset > last_offset) {
last_offset = offset;
/* There is no initial connect byte or SASL when using ARDP. */
if(!is_ardp) {
offset = handle_message_connect(tvb, pinfo, offset, message_tree);
if(offset >= packet_length) {
break;
}
offset = handle_message_sasl(tvb, pinfo, offset, message_tree);
if(offset >= packet_length) {
break;
}
}
offset = handle_message_header_body(tvb, pinfo, offset, message_tree, is_ardp);
}
return offset;
}
static void
ns_parse_questions(tvbuff_t *tvb, gint* offset, proto_tree* alljoyn_tree, guint8 questions, guint message_version)
{
while(questions--) {
proto_item *alljoyn_questions_ti;
proto_tree *alljoyn_questions_tree;
gint count;
alljoyn_questions_ti = proto_tree_add_item(alljoyn_tree, hf_alljoyn_ns_whohas, tvb, *offset, 2, ENC_NA); /* "Who-Has Message" */
alljoyn_questions_tree = proto_item_add_subtree(alljoyn_questions_ti, ett_alljoyn_whohas);
if(0 == message_version) {
proto_tree_add_item(alljoyn_questions_tree, hf_alljoyn_ns_whohas_t_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_questions_tree, hf_alljoyn_ns_whohas_u_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_questions_tree, hf_alljoyn_ns_whohas_s_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_questions_tree, hf_alljoyn_ns_whohas_f_flag, tvb, *offset, 1, ENC_NA);
}
(*offset) += 1;
proto_tree_add_item(alljoyn_questions_tree, hf_alljoyn_ns_whohas_count, tvb, *offset, 1, ENC_NA);
count = tvb_get_guint8(tvb, *offset);
(*offset) += 1;
while(count--) {
proto_item *alljoyn_bus_name_ti;
proto_tree *alljoyn_bus_name_tree;
gint bus_name_size = 0;
bus_name_size = tvb_get_guint8(tvb, *offset);
alljoyn_bus_name_ti = proto_tree_add_item(alljoyn_questions_tree, hf_alljoyn_string, tvb,
*offset, 1 + bus_name_size, ENC_NA);
alljoyn_bus_name_tree = proto_item_add_subtree(alljoyn_bus_name_ti, ett_alljoyn_ns_string);
proto_tree_add_item(alljoyn_bus_name_tree, hf_alljoyn_string_size_8bit, tvb, *offset, 1, ENC_NA);
(*offset) += 1;
proto_tree_add_item(alljoyn_bus_name_tree, hf_alljoyn_string_data, tvb, *offset, bus_name_size, ENC_ASCII|ENC_NA);
(*offset) += bus_name_size;
}
}
}
/* The version 0 protocol looks like this:
* Byte 0:
* Bit 0 (ISAT_F): If '1' indicates the daemon is listening on an IPv4
* address and that an IPv4 address is present in the message. If '0'
* there is no IPv4 address present.
*
* Bit 1 (ISAT_S): If '1' the responding daemon is listening on an IPv6
* address and that an IPv6 address is present in the message. If '0'
* there is no IPv6 address present.
*
* Bit 2 (ISAT_U): If '1' the daemon is listening on UDP.
*
* Bit 3 (ISAT_T): If '1' the daemon is listening on TCP.
*
* Bit 4 (ISAT_C): If '1' the list of StringData records is a complete
* list of all well-known names exported by the daemon.
*
* Bit 5 (ISAT_G): If '1' a variable length daemon GUID string is present.
*
* Bits 6-7: The message type of the IS-AT message. Defined to be '01' (1).
*
* Byte 1 (Count): The number of StringData items. Each StringData item
* describes one well-known bus name supported by the daemon.
*
* Bytes 2-3 (Port): The port on which the daemon is listening.
*
* If the ISAT_F bit is set then the next four bytes is the IPv4 address on
* which the daemon is listening.
*
* If the ISAT_S bit is set then the next 16 bytes is the IPv6 address on
* which the daemon is listening.
*
* If the ISAT_G bit is set then the next data is daemon GUID StringData.
*
* The next data is a variable number of StringData records.
*/
static void
ns_parse_answers_v0(tvbuff_t *tvb, gint* offset, proto_tree* alljoyn_tree, guint8 answers)
{
while(answers--) {
proto_item *alljoyn_answers_ti;
proto_tree *alljoyn_answers_tree;
gint flags;
gint count;
alljoyn_answers_ti = proto_tree_add_item(alljoyn_tree, hf_alljoyn_answer, tvb, *offset, 2, ENC_NA);
alljoyn_answers_tree = proto_item_add_subtree(alljoyn_answers_ti, ett_alljoyn_ns_answers);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_g_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_c_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_t_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_u_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_s_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_f_flag, tvb, *offset, 1, ENC_NA);
flags = tvb_get_guint8(tvb, *offset);
(*offset) += 1;
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_count, tvb, *offset, 1, ENC_NA);
count = tvb_get_guint8(tvb, *offset);
(*offset) += 1;
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_port, tvb, *offset, 2, ENC_BIG_ENDIAN);
(*offset) += 2;
if(flags & ISAT_S) {
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_ipv6, tvb, *offset, 16, ENC_NA);
(*offset) += 16;
}
if(flags & ISAT_F) {
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_ipv4, tvb, *offset, 4, ENC_BIG_ENDIAN);
(*offset) += 4;
}
if(flags & ISAT_G) {
proto_item *alljoyn_string_ti;
proto_tree *alljoyn_string_tree;
gint guid_size = 0;
guid_size = tvb_get_guint8(tvb, *offset);
alljoyn_string_ti = proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_isat_guid_string, tvb,
*offset, 1 + guid_size, ENC_NA);
alljoyn_string_tree = proto_item_add_subtree(alljoyn_string_ti, ett_alljoyn_ns_guid_string);
proto_tree_add_item(alljoyn_string_tree, hf_alljoyn_string_size_8bit, tvb, *offset, 1, ENC_NA);
(*offset) += 1;
proto_tree_add_item(alljoyn_string_tree, hf_alljoyn_string_data, tvb, *offset, guid_size, ENC_ASCII|ENC_NA);
(*offset) += guid_size;
}
while(count--) {
proto_item *alljoyn_entry_ti;
proto_tree *alljoyn_entry_tree;
proto_item *alljoyn_bus_name_ti;
proto_tree *alljoyn_bus_name_tree;
gint bus_name_size = tvb_get_guint8(tvb, *offset);
alljoyn_entry_ti = proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_isat_entry, tvb,
*offset, 1 + bus_name_size, ENC_NA);
alljoyn_entry_tree = proto_item_add_subtree(alljoyn_entry_ti, ett_alljoyn_ns_isat_entry);
alljoyn_bus_name_ti = proto_tree_add_item(alljoyn_entry_tree, hf_alljoyn_string, tvb, *offset,
1 + bus_name_size, ENC_NA);
alljoyn_bus_name_tree = proto_item_add_subtree(alljoyn_bus_name_ti, ett_alljoyn_string);
proto_tree_add_item(alljoyn_bus_name_tree, hf_alljoyn_string_size_8bit, tvb, *offset, 1, ENC_NA);
(*offset) += 1;
proto_tree_add_item(alljoyn_bus_name_tree, hf_alljoyn_string_data, tvb, *offset, bus_name_size, ENC_ASCII|ENC_NA);
(*offset) += bus_name_size;
}
}
}
/* The version 1 protocol looks like this:
* Byte 0:
* Bit 0 (ISAT_U6): If '1' then the IPv6 endpoint of an unreliable method
* (UDP) transport (IP address and port) is present.
*
* Bit 1 (ISAT_R6): If '1' the the IPv6 endpoint of a reliable method
* (TCP) transport (IP address and port) is present.
*
* Bit 2 (ISAT_U4): If '1' then the IPv4 endpoint of an unreliable method
* (UDP) transport (IP address and port) is present.
*
* Bit 3 (ISAT_R4): If '1' then the IPv4 endpoint of a reliable method
* (TCP) transport (IP address and port) is present.
*
* Bit 4 (ISAT_C): If '1' the list of StringData records is a complete
* list of all well-known names exported by the daemon.
*
* Bit 5 (ISAT_G): If '1' a variable length daemon GUID string is present.
*
* Bits 6-7: The message type of the IS-AT message. Defined to be '01' (1).
*
* Byte 1 (Count): The number of StringData items. Each StringData item
* describes one well-known bus name supported by the daemon.
*
* Bytes 2-3 (TransportMask): The bit mask of transport identifiers that
* indicates which AllJoyn transport is making the advertisement.
*
* If the ISAT_R4 bit is set then the next four bytes is the IPv4 address on
* which the daemon is listening.
*
* If the ISAT_R4 bit is set then the next two bytes is the IPv4 port on
* which the daemon is listening.
*
* If the ISAT_R6 bit is set then the next 16 bytes is the IPv6 address on
* which the daemon is listening for TCP traffic.
*
* If the ISAT_R6 bit is set then the next two bytes is the IPv6 port on
* which the daemon is listening for TCP traffic.
*
* If the ISAT_U6 bit is set then the next 16 bytes is the IPv6 address on
* which the daemon is listening for UDP traffic.
*
* If the ISAT_U6 bit is set then the next two bytes is the IPv6 port on
* which the daemon is listening for UDP traffic.
*
* If the ISAT_G bit is set then the next data is daemon GUID StringData.
*
* The next data is a variable number of StringData records.
*/
static void
ns_parse_answers_v1(tvbuff_t *tvb, gint* offset, proto_tree* alljoyn_tree, guint8 answers)
{
while(answers--) {
proto_item *alljoyn_answers_ti;
proto_tree *alljoyn_answers_tree;
gint flags;
gint count;
alljoyn_answers_ti = proto_tree_add_item(alljoyn_tree, hf_alljoyn_answer, tvb, *offset, 2, ENC_NA);
alljoyn_answers_tree = proto_item_add_subtree(alljoyn_answers_ti, ett_alljoyn_ns_answers);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_g_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_c_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_r4_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_u4_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_r6_flag, tvb, *offset, 1, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_u6_flag, tvb, *offset, 1, ENC_NA);
flags = tvb_get_guint8(tvb, *offset);
(*offset) += 1;
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_count, tvb, *offset, 1, ENC_NA);
count = tvb_get_guint8(tvb, *offset);
(*offset) += 1;
/* The entire transport mask. */
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_transport_mask, tvb, *offset, 2, ENC_BIG_ENDIAN);
/* The individual bits of the transport mask. */
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_transport_mask_wfd, tvb, *offset, 2, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_transport_mask_ice, tvb, *offset, 2, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_transport_mask_lan, tvb, *offset, 2, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_transport_mask_wwan, tvb, *offset, 2, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_transport_mask_tcp, tvb, *offset, 2, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_transport_mask_bluetooth, tvb, *offset, 2, ENC_NA);
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_transport_mask_local, tvb, *offset, 2, ENC_NA);
(*offset) += 2;
if(flags & ISAT_R4) {
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_ipv4, tvb, *offset, 4, ENC_BIG_ENDIAN);
(*offset) += 4;
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_port, tvb, *offset, 2, ENC_BIG_ENDIAN);
(*offset) += 2;
}
if(flags & ISAT_U4) {
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_ipv4, tvb, *offset, 4, ENC_BIG_ENDIAN);
(*offset) += 4;
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_port, tvb, *offset, 2, ENC_BIG_ENDIAN);
(*offset) += 2;
}
if(flags & ISAT_R6) {
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_ipv6, tvb, *offset, 16, ENC_NA);
(*offset) += 16;
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_port, tvb, *offset, 2, ENC_BIG_ENDIAN);
(*offset) += 2;
}
if(flags & ISAT_U6) {
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_ipv6, tvb, *offset, 16, ENC_NA);
(*offset) += 16;
proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_ns_isat_port, tvb, *offset, 2, ENC_BIG_ENDIAN);
(*offset) += 2;
}
if(flags & ISAT_G) {
proto_item *alljoyn_string_ti;
proto_tree *alljoyn_string_tree;
gint guid_size;
guid_size = tvb_get_guint8(tvb, *offset);
alljoyn_string_ti = proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_isat_guid_string, tvb,
*offset, 1 + guid_size, ENC_NA);
alljoyn_string_tree = proto_item_add_subtree(alljoyn_string_ti, ett_alljoyn_ns_guid_string);
proto_tree_add_item(alljoyn_string_tree, hf_alljoyn_string_size_8bit, tvb, *offset, 1, ENC_NA);
(*offset) += 1;
proto_tree_add_item(alljoyn_string_tree, hf_alljoyn_string_data, tvb, *offset, guid_size, ENC_ASCII|ENC_NA);
(*offset) += guid_size;
}
/* The string data records. */
while(count--) {
proto_item *alljoyn_entry_ti;
proto_tree *alljoyn_entry_tree;
proto_tree *alljoyn_bus_name_ti;
proto_tree *alljoyn_bus_name_tree;
gint bus_name_size = tvb_get_guint8(tvb, *offset);
alljoyn_entry_ti = proto_tree_add_item(alljoyn_answers_tree, hf_alljoyn_isat_entry, tvb,
*offset, 1 + bus_name_size, ENC_NA);
alljoyn_entry_tree = proto_item_add_subtree(alljoyn_entry_ti, ett_alljoyn_isat_entry);
alljoyn_bus_name_ti = proto_tree_add_item(alljoyn_entry_tree, hf_alljoyn_string, tvb, *offset,
1 + bus_name_size, ENC_NA);
alljoyn_bus_name_tree = proto_item_add_subtree(alljoyn_bus_name_ti, ett_alljoyn_string);
proto_tree_add_item(alljoyn_bus_name_tree, hf_alljoyn_string_size_8bit, tvb, *offset, 1, ENC_NA);
(*offset) += 1;
proto_tree_add_item(alljoyn_bus_name_tree, hf_alljoyn_string_data, tvb, *offset, bus_name_size, ENC_ASCII|ENC_NA);
(*offset) += bus_name_size;
}
}
}
/* This is called by Wireshark for packet types that are registered
in the proto_reg_handoff_AllJoyn() function. This function handles
the packets for the name server traffic.
* @param tvb is the incoming network data buffer.
* @param pinfo contains information about the incoming packet which
* we update as we dissect the packet.
* @param tree is the tree data items should be added to.
*/
static int
dissect_AllJoyn_name_server(tvbuff_t *tvb,
packet_info *pinfo,
proto_tree *tree,
void *data _U_)
{
proto_item *alljoyn_item, *header_item;
proto_tree *alljoyn_tree, *header_tree;
guint8 questions, answers;
guint8 version;
int offset = 0;
/* This is name service traffic. Mark it as such at the top level. */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ALLJOYN-NS");
col_clear(pinfo->cinfo, COL_INFO);
/* Add a subtree covering the remainder of the packet */
alljoyn_item = proto_tree_add_item(tree, proto_AllJoyn_ns, tvb, 0, -1, ENC_NA);
alljoyn_tree = proto_item_add_subtree(alljoyn_item, ett_alljoyn_ns);
/* Add the "header protocol" as a subtree from the AllJoyn Name Service Protocol. */
header_item = proto_tree_add_item(alljoyn_tree, hf_alljoyn_ns_header, tvb, offset, 4, ENC_NA);
header_tree = proto_item_add_subtree(header_item, ett_alljoyn_ns_header);
/* The the sender and message versions as fields for the header protocol. */
proto_tree_add_item(header_tree, hf_alljoyn_ns_sender_version, tvb, offset, 1, ENC_NA);
proto_tree_add_item(header_tree, hf_alljoyn_ns_message_version, tvb, offset, 1, ENC_NA);
version = tvb_get_guint8(tvb, offset) & 0xF;
offset += 1;
col_add_fstr(pinfo->cinfo, COL_INFO, "VERSION %u", version);
if(version > 1)
col_append_str(pinfo->cinfo, COL_INFO, " (UNSUPPORTED)");
proto_tree_add_item(header_tree, hf_alljoyn_ns_questions, tvb, offset, 1, ENC_NA);
questions = tvb_get_guint8(tvb, offset);
offset += 1;
proto_tree_add_item(header_tree, hf_alljoyn_ns_answers, tvb, offset, 1, ENC_NA);
answers = tvb_get_guint8(tvb, offset);
offset += 1;
if(answers > 0)
col_append_str(pinfo->cinfo, COL_INFO, " ISAT");
if(questions > 0)
col_append_str(pinfo->cinfo, COL_INFO, " WHOHAS");
proto_tree_add_item(header_tree, hf_alljoyn_ns_timer, tvb, offset, 1, ENC_NA);
offset += 1;
if(tree) { /* we are being asked for details */
ns_parse_questions(tvb, &offset, alljoyn_tree, questions, version);
switch(version) {
case 0:
ns_parse_answers_v0(tvb, &offset, alljoyn_tree, answers);
break;
case 1:
ns_parse_answers_v1(tvb, &offset, alljoyn_tree, answers);
break;
default:
/* XXX - expert info */
/* This case being unsupported is reported in the column info by
* the caller of this function. */
break;
}
}
return tvb_reported_length(tvb);
}
/* This is a container for the ARDP info and Wireshark tree information.
*/
typedef struct _alljoyn_ardp_tree_data
{
gint offset;
gboolean syn;
gboolean ack;
gboolean eak;
gboolean rst;
gboolean nul;
guint sequence;
guint start_sequence;
guint16 fragment_count;
gint acknowledge;
proto_tree *alljoyn_tree;
} alljoyn_ardp_tree_data;
/* This is called by dissect_AllJoyn_ardp() to read the header
* and fill out most of tree_data.
* @param tvb is the incoming network data buffer.
* @param pinfo contains information about the incoming packet which
* we update as we dissect the packet.
* @param tree_data is the destination of the data..
*/
static void
ardp_parse_header(tvbuff_t *tvb,
packet_info *pinfo,
alljoyn_ardp_tree_data *tree_data)
{
guint8 flags, header_length;
gint eaklen, packet_length;
guint16 data_length;
packet_length = tvb_reported_length(tvb);
flags = tvb_get_guint8(tvb, 0);
tree_data->syn = (flags & ARDP_SYN) != 0;
tree_data->ack = (flags & ARDP_ACK) != 0;
tree_data->eak = (flags & ARDP_EAK) != 0;
tree_data->rst = (flags & ARDP_RST) != 0;
tree_data->nul = (flags & ARDP_NUL) != 0;
/* The packet length has to be ARDP_HEADER_LEN_OFFSET long or protocol_is_ardp() would
have returned false. Length is expressed in words so multiply by 2. */
header_length = 2 * tvb_get_guint8(tvb, ARDP_HEADER_LEN_OFFSET);
if(packet_length < ARDP_DATA_LENGTH_OFFSET + 2) {
/* If we need more data before dissecting then communicate the number of additional bytes needed. */
set_pinfo_desegment(pinfo, 0, ARDP_DATA_LENGTH_OFFSET + 2 - packet_length);
/* Inform the caller we made it this far. Returning zero means we made no progress.
This is the offset just past the last byte we successfully retrieved. */
tree_data->offset = ARDP_HEADER_LEN_OFFSET + 1;
return;
}
data_length = tvb_get_ntohs(tvb, ARDP_DATA_LENGTH_OFFSET);
if(packet_length < header_length + data_length) {
/* If we need more data before dissecting then communicate the number of additional bytes needed. */
set_pinfo_desegment(pinfo, 0, header_length + data_length - packet_length);
/* Inform the caller we made it this far. Returning zero it means we made no progress.
This is the offset just past the last byte we successfully retrieved. */
tree_data->offset = ARDP_DATA_LENGTH_OFFSET + 2;
return;
}
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_syn_flag, tvb, tree_data->offset, 1, ENC_NA);
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_ack_flag, tvb, tree_data->offset, 1, ENC_NA);
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_eak_flag, tvb, tree_data->offset, 1, ENC_NA);
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_rst_flag, tvb, tree_data->offset, 1, ENC_NA);
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_nul_flag, tvb, tree_data->offset, 1, ENC_NA);
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_unused_flag, tvb, tree_data->offset, 1, ENC_NA);
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_version_field, tvb, tree_data->offset, 1, ENC_NA);
tree_data->offset += 1;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_hlen, tvb, tree_data->offset, 1, ENC_NA);
tree_data->offset += 1;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_src, tvb, tree_data->offset, 2, ENC_BIG_ENDIAN);
tree_data->offset += 2;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_dst, tvb, tree_data->offset, 2, ENC_BIG_ENDIAN);
tree_data->offset += 2;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_dlen, tvb, tree_data->offset, 2, ENC_BIG_ENDIAN);
tree_data->offset += 2;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_seq, tvb, tree_data->offset, 4, ENC_BIG_ENDIAN);
tree_data->sequence = tvb_get_ntohl(tvb, tree_data->offset);
tree_data->offset += 4;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_ack, tvb, tree_data->offset, 4, ENC_BIG_ENDIAN);
tree_data->acknowledge = tvb_get_ntohl(tvb, tree_data->offset);
tree_data->offset += 4;
if(tree_data->syn) {
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_segmax, tvb, tree_data->offset, 2, ENC_BIG_ENDIAN);
tree_data->offset += 2;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_segbmax, tvb, tree_data->offset, 2, ENC_BIG_ENDIAN);
tree_data->offset += 2;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_dackt, tvb, tree_data->offset, 4, ENC_BIG_ENDIAN);
tree_data->offset += 4;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_options, tvb, tree_data->offset, 2, ENC_BIG_ENDIAN);
tree_data->offset += 2;
} else {
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_ttl, tvb, tree_data->offset, 4, ENC_BIG_ENDIAN);
tree_data->offset += 4;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_lcs, tvb, tree_data->offset, 4, ENC_BIG_ENDIAN);
tree_data->offset += 4;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_nsa, tvb, tree_data->offset, 4, ENC_BIG_ENDIAN);
tree_data->offset += 4;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_fss, tvb, tree_data->offset, 4, ENC_BIG_ENDIAN);
tree_data->start_sequence = tvb_get_ntohl(tvb, tree_data->offset);
tree_data->offset += 4;
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_fcnt, tvb, tree_data->offset, 2, ENC_BIG_ENDIAN);
tree_data->fragment_count = tvb_get_ntohs(tvb, tree_data->offset);
tree_data->offset += 2;
eaklen = header_length - ARDP_FIXED_HDR_LEN;
/* In the case of a corrupted packet eaklen could be < 0 and bad things could happen. */
if(eaklen > 0) {
if(tree_data->eak) {
proto_tree_add_item(tree_data->alljoyn_tree, hf_ardp_bmp, tvb, tree_data->offset, eaklen, ENC_NA);
}
tree_data->offset += eaklen;
}
/* The data_length bytes, if any, will be passed on to the dissect_AllJoyn_message() handler. */
}
}
/* Test to see if this buffer contains something that might be the AllJoyn ARDP protocol.
* @param tvb is the incoming network data buffer.
* @returns TRUE if probably the AllJoyn ARDP protocol.
* FALSE if probably not the AllJoyn ARDP protocol.
*/
static gboolean
protocol_is_ardp(tvbuff_t *tvb)
{
guint8 flags, header_length;
gint length = tvb_captured_length(tvb);
/* We must be able to get the byte value at this offset to determine if it is an ARDP protocol. */
if(length < ARDP_HEADER_LEN_OFFSET + 1) {
return FALSE;
}
/* Length is expressed in words. */
header_length = 2 * tvb_get_guint8(tvb, ARDP_HEADER_LEN_OFFSET);
flags = tvb_get_guint8(tvb, 0);
if((flags & ARDP_SYN) && header_length != ARDP_SYN_FIXED_HDR_LEN) {
return FALSE;
}
if(!(flags & ARDP_SYN) && header_length < ARDP_FIXED_HDR_LEN) {
return FALSE;
}
return TRUE;
}
/* This is called by Wireshark for packet types that are registered
in the proto_reg_handoff_AllJoyn() function. This function handles
the packets for the ARDP and bare AllJoyn message protocols. A test
for bare AllJoyn message protocol is done first. If it is an AllJoyn
packet then only dissect_AllJoyn_message() is called to dissect the
data. If protocol_is_alljoyn_message() returns FALSE then a test for
the ARDP protocol is performed. If it succeeds then ARDP dissection
proceeds and may call dissect_AllJoyn_message() with the offset just
past the ARDP protocol.
* @param tvb is the incoming network data buffer.
* @param pinfo contains information about the incoming packet which
* we update as we dissect the packet.
* @param tree is the tree data items should be added to.
* @return 0 if not AllJoyn ARDP protocol, or
* the offset into the buffer we have dissected (which should normally
* be the packet length), or
* the offset into the buffer we have dissected with
* pinfo->desegment_len == additional bytes needed from the next packet
* before we can dissect.
*/
static int
dissect_AllJoyn_ardp(tvbuff_t *tvb,
packet_info *pinfo,
proto_tree *tree,
void *data _U_)
{
alljoyn_ardp_tree_data tree_data = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
gint packet_length = tvb_reported_length(tvb);
proto_item *alljoyn_item = NULL;
gboolean fragmentedPacket = FALSE;
if(protocol_is_alljoyn_message(tvb, 0, FALSE)) {
return dissect_AllJoyn_message(tvb, pinfo, tree, 0);
}
if(!protocol_is_ardp(tvb)) {
return 0;
}
pinfo->desegment_len = 0;
/* Add a subtree covering the remainder of the packet */
alljoyn_item = proto_tree_add_item(tree, proto_AllJoyn_ardp, tvb, 0, -1, ENC_NA);
tree_data.alljoyn_tree = proto_item_add_subtree(alljoyn_item, ett_alljoyn_ardp);
ardp_parse_header(tvb, pinfo, &tree_data);
/* Is desegmention needed? */
if(pinfo->desegment_len != 0) {
return tree_data.offset;
}
if(tree_data.offset != 0) {
/* This is ARDP traffic. Mark it as such at the top level. */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ALLJOYN-ARDP");
}
if(tree_data.offset < packet_length) {
gint return_value = 0;
/* We have dissected the ARDP portion. Is the remainder an AllJoyn message? */
if(protocol_is_alljoyn_message(tvb, tree_data.offset, TRUE)) {
return_value = dissect_AllJoyn_message(tvb, pinfo, tree, tree_data.offset);
}
else {
fragmentedPacket = !tree_data.syn && (tree_data.sequence > tree_data.start_sequence);
}
/* return_value will be the offset into the successfully parsed
* buffer, the requested length of a reassembled packet (with pinfo->desegment_len
* and pinfo->desegment_offset set appropriately), 0 if desegmentation is needed but
* isn't available, or the initial value (tree_data.offset) if no progress was made.
* If dissect_AllJoyn_message() made progress or is requesting desegmentation then
* return leaving the column info as handled by the AllJoyn message dissector. If
* not then we fall through to set the column info in this dissector.
*/
if(return_value > tree_data.offset) {
return return_value;
}
}
col_clear(pinfo->cinfo, COL_INFO);
col_append_str(pinfo->cinfo, COL_INFO, "flags:");
if(tree_data.syn) {
col_append_str(pinfo->cinfo, COL_INFO, " SYN");
}
if(tree_data.ack) {
col_append_str(pinfo->cinfo, COL_INFO, " ACK");
}
if(tree_data.eak) {
col_append_str(pinfo->cinfo, COL_INFO, " EAK");
}
if(tree_data.rst) {
col_append_str(pinfo->cinfo, COL_INFO, " RST");
}
if(tree_data.nul) {
col_append_str(pinfo->cinfo, COL_INFO, " NUL");
}
col_append_fstr(pinfo->cinfo, COL_INFO, " SEQ: %10u", tree_data.sequence);
col_append_fstr(pinfo->cinfo, COL_INFO, " ACK: %10u", tree_data.acknowledge);
if(fragmentedPacket) {
guint fragment = (tree_data.sequence - tree_data.start_sequence) + 1;
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Fragment %d of %d for a previous ALLJOYN message", fragment, tree_data.fragment_count);
}
return tree_data.offset;
}
void
proto_register_AllJoyn(void)
{
expert_module_t* expert_alljoyn;
/* A header field is something you can search/filter on.
*
* We create a structure to register our fields. It consists of an
* array of hf_register_info structures, each of which are of the format
* {&(field id), {name, abbrev, type, display, strings, bitmask, blurb, HFILL}}.
* The array below defines what elements we will be displaying. These
* declarations are simply a definition Wireshark uses to determine the data
* type, when we later dissect the packet.
*/
static hf_register_info hf[] = {
/******************
* Wireshark header fields for the name service protocol.
******************/
{&hf_alljoyn_ns_header,
{"Header", "alljoyn.header",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_ns_sender_version,
{"Sender Version", "alljoyn.header.sendversion",
FT_UINT8, BASE_DEC, NULL, 0xF0,
NULL, HFILL}
},
{&hf_alljoyn_ns_message_version,
{"Message Version", "alljoyn.header.messageversion",
FT_UINT8, BASE_DEC, NULL, 0x0F,
NULL, HFILL}
},
{&hf_alljoyn_ns_questions,
{"Questions", "alljoyn.header.questions",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_ns_answers,
{"Answers", "alljoyn.header.answers",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_ns_timer,
{"Timer", "alljoyn.header.timer",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_ns_whohas,
{"Who-Has Message", "alljoyn.whohas",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_ns_whohas_t_flag,
{"TCP", "alljoyn.whohas.T",
FT_BOOLEAN, 8, NULL, WHOHAS_T,
NULL, HFILL}
},
{&hf_alljoyn_ns_whohas_u_flag,
{"UDP", "alljoyn.whohas.U",
FT_BOOLEAN, 8, NULL, WHOHAS_U,
NULL, HFILL}
},
{&hf_alljoyn_ns_whohas_s_flag,
{"IPv6", "alljoyn.whohas.S",
FT_BOOLEAN, 8, NULL, WHOHAS_S,
NULL, HFILL}
},
{&hf_alljoyn_ns_whohas_f_flag,
{"IPv4", "alljoyn.whohas.F",
FT_BOOLEAN, 8, NULL, WHOHAS_F,
NULL, HFILL}
},
{&hf_alljoyn_ns_whohas_count,
{"Count", "alljoyn.whohas.count",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_answer,
{"Is-At Message", "alljoyn.isat",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_isat_entry,
{"Advertisement Entry", "alljoyn.isat_entry",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_isat_guid_string,
{"GUID String", "alljoyn.isat_guid_string",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
/* Common to V0 and V1 IS-AT messages. */
{&hf_alljoyn_ns_isat_g_flag,
{"GUID", "alljoyn.isat.G",
FT_BOOLEAN, 8, NULL, ISAT_G,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_c_flag,
{"Complete", "alljoyn.isat.C",
FT_BOOLEAN, 8, NULL, ISAT_C,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_count,
{"Count", "alljoyn.isat.count",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_ipv6,
{"IPv6 Address", "alljoyn.isat.ipv6",
FT_IPv6, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_ipv4,
{"IPv4 Address", "alljoyn.isat.ipv4",
FT_IPv4, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
/* Version 0 IS-AT messages. */
{&hf_alljoyn_ns_isat_t_flag,
{"TCP", "alljoyn.isat.T",
FT_BOOLEAN, 8, NULL, ISAT_T,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_u_flag,
{"UDP", "alljoyn.isat.U",
FT_BOOLEAN, 8, NULL, ISAT_U,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_s_flag,
{"IPv6", "alljoyn.isat.S",
FT_BOOLEAN, 8, NULL, ISAT_S,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_f_flag,
{"IPv4", "alljoyn.isat.F",
FT_BOOLEAN, 8, NULL, ISAT_F,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_port,
{"Port", "alljoyn.isat.port",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
/* Version 1 IS-AT messages. */
{&hf_alljoyn_ns_isat_u6_flag,
{"IPv6 UDP", "alljoyn.isat.U6",
FT_BOOLEAN, 8, NULL, ISAT_U6,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_r6_flag,
{"IPv6 TCP", "alljoyn.isat.R6",
FT_BOOLEAN, 8, NULL, ISAT_R6,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_u4_flag,
{"IPv4 UDP", "alljoyn.isat.U4",
FT_BOOLEAN, 8, NULL, ISAT_U4,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_r4_flag,
{"IPv4 TCP", "alljoyn.isat.R4",
FT_BOOLEAN, 8, NULL, ISAT_R4,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_transport_mask,
{"Transport Mask", "alljoyn.isat.TransportMask",
FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_transport_mask_local,
{"Local Transport", "alljoyn.isat.TransportMask.Local",
FT_BOOLEAN, 16, NULL, TRANSPORT_LOCAL,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_transport_mask_bluetooth,
{"Bluetooth Transport", "alljoyn.isat.TransportMask.Bluetooth",
FT_BOOLEAN, 16, NULL, TRANSPORT_BLUETOOTH,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_transport_mask_tcp,
{"TCP Transport", "alljoyn.isat.TransportMask.TCP",
FT_BOOLEAN, 16, NULL, TRANSPORT_TCP,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_transport_mask_wwan,
{"Wirelesss WAN Transport", "alljoyn.isat.TransportMask.WWAN",
FT_BOOLEAN, 16, NULL, TRANSPORT_WWAN,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_transport_mask_lan,
{"Wired LAN Transport", "alljoyn.isat.TransportMask.LAN",
FT_BOOLEAN, 16, NULL, TRANSPORT_LAN,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_transport_mask_ice,
{"ICE protocol Transport", "alljoyn.isat.TransportMask.ICE",
FT_BOOLEAN, 16, NULL, TRANSPORT_ICE,
NULL, HFILL}
},
{&hf_alljoyn_ns_isat_transport_mask_wfd,
{"Wi-Fi Direct Transport", "alljoyn.isat.TransportMask.WFD",
FT_BOOLEAN, 16, NULL, TRANSPORT_WFD,
NULL, HFILL}
},
/******************
* Wireshark header fields for the message protocol.
******************/
{&hf_alljoyn_connect_byte_value,
{"Connect Initial Byte", "alljoyn.InitialByte",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL}
},
/*
* Wireshark header fields for the SASL messages.
*/
{&hf_alljoyn_sasl_command,
{"SASL command", "alljoyn.SASL.command",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_sasl_parameter,
{"SASL parameter", "alljoyn.SASL.parameter",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
/*
* Wireshark header fields for the AllJoyn message header.
*/
{&hf_alljoyn_mess_header,
{"Message Header", "alljoyn.mess_header",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_endian,
{"Endianness", "alljoyn.mess_header.endianess",
FT_UINT8, BASE_DEC, VALS(endian_encoding_vals), 0x0,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_type,
{"Message type", "alljoyn.mess_header.type",
FT_UINT8, BASE_DEC, VALS(message_header_encoding_vals), 0x0,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_flags,
{"Flags", "alljoyn.mess_header.flags",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL}
},
/* Individual fields of the flags byte. */
{&hf_alljoyn_mess_header_flags_no_reply,
{"No reply expected", "alljoyn.mess_header.flags.noreply",
FT_BOOLEAN, 8, NULL, MESSAGE_HEADER_FLAG_NO_REPLY_EXPECTED,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_flags_no_auto_start,
{"No auto start", "alljoyn.mess_header.flags.noautostart",
FT_BOOLEAN, 8, NULL, MESSAGE_HEADER_FLAG_NO_AUTO_START,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_flags_allow_remote_msg,
{"Allow remote messages", "alljoyn.mess_header.flags.allowremotemessages",
FT_BOOLEAN, 8, NULL, MESSAGE_HEADER_FLAG_ALLOW_REMOTE_MSG,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_flags_sessionless,
{"Sessionless", "alljoyn.mess_header.flags.sessionless",
FT_BOOLEAN, 8, NULL, MESSAGE_HEADER_FLAG_SESSIONLESS,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_flags_global_broadcast,
{"Allow global broadcast", "alljoyn.mess_header.flags.globalbroadcast",
FT_BOOLEAN, 8, NULL, MESSAGE_HEADER_FLAG_GLOBAL_BROADCAST,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_flags_compressed,
{"Compressed", "alljoyn.mess_header.flags.compressed",
FT_BOOLEAN, 8, NULL, MESSAGE_HEADER_FLAG_COMPRESSED,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_flags_encrypted,
{"Encrypted", "alljoyn.mess_header.flags.encrypted",
FT_BOOLEAN, 8, NULL, MESSAGE_HEADER_FLAG_ENCRYPTED,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_majorversion,
{"Major version", "alljoyn.mess_header.majorversion",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_body_length,
{"Body length", "alljoyn.mess_header.bodylength",
FT_UINT32, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_serial,
{"Serial number", "alljoyn.mess_header.serial",
FT_UINT32, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_header_length,
{"Header length", "alljoyn.mess_header.headerlength",
FT_UINT32, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_fields,
{"Header fields", "alljoyn.mess_header.fields",
FT_BYTES, BASE_NONE, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_header_field,
{"Header field", "alljoyn.mess_header.field",
FT_UINT8, BASE_HEX, VALS(mess_header_field_encoding_vals), 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_body_header_fieldcode,
{"Field code", "alljoyn.message.fieldcode",
FT_UINT8, BASE_HEX, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_body_header_typeid,
{"Type ID", "alljoyn.message.typeid",
FT_UINT8, BASE_CUSTOM, CF_FUNC(alljoyn_typeid), 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_body_parameters,
{"Parameters", "alljoyn.parameters",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_body_array,
{"Array", "alljoyn.array",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_body_structure,
{"struct", "alljoyn.structure",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_body_dictionary_entry,
{"dictionary entry", "alljoyn.dictionary_entry",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_body_variant,
{"Variant '", "alljoyn.variant",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_body_signature_length,
{"Signature length", "alljoyn.parameter.signature_length",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_mess_body_signature,
{"Signature", "alljoyn.parameter.signature",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_boolean,
{"Boolean", "alljoyn.boolean",
FT_BOOLEAN, BASE_NONE, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_uint8,
{"Unsigned byte", "alljoyn.uint8",
FT_UINT8, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_int16,
{"Signed int16", "alljoyn.int16",
FT_INT16, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_uint16,
{"Unsigned int16", "alljoyn.uint16",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_handle,
{"Handle", "alljoyn.handle",
FT_UINT32, BASE_HEX, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_int32,
{"Signed int32", "alljoyn.int32",
FT_INT32, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_uint32,
{"Unsigned int32", "alljoyn.uint32",
FT_UINT32, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_int64,
{"Signed int64", "alljoyn.int64",
FT_INT64, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_uint64,
{"Unsigned int64", "alljoyn.uint64",
FT_UINT64, BASE_DEC, NULL, 0,
NULL, HFILL}
},
{&hf_alljoyn_double,
{"Double", "alljoyn.double",
FT_DOUBLE, BASE_NONE, NULL, 0,
NULL, HFILL}
},
{&hf_padding,
{"Padding", "alljoyn.padding",
FT_BYTES, BASE_NONE, NULL, 0,
NULL, HFILL}
},
/*
* Strings are composed of a size and a data array.
*/
{&hf_alljoyn_string,
{"Bus Name", "alljoyn.string",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_string_size_8bit,
{"String Size 8-bit", "alljoyn.string.size8bit",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_string_size_32bit,
{"String Size 32-bit", "alljoyn.string.size32bit",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{&hf_alljoyn_string_data,
{"String Data", "alljoyn.string.data",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
/******************
* Wireshark header fields for the AllJoyn Reliable Data Protocol.
******************/
{&hf_ardp_syn_flag,
{"SYN", "ardp.hdr.SYN",
FT_BOOLEAN, 8, NULL, ARDP_SYN,
NULL, HFILL}
},
{&hf_ardp_ack_flag,
{"ACK", "ardp.hdr.ACK",
FT_BOOLEAN, 8, NULL, ARDP_ACK,
NULL, HFILL}},
{&hf_ardp_eak_flag,
{"EAK", "ardp.hdr.EAK",
FT_BOOLEAN, 8, NULL, ARDP_EAK,
NULL, HFILL}},
{&hf_ardp_rst_flag,
{"RST", "ardp.hdr.RST",
FT_BOOLEAN, 8, NULL, ARDP_RST,
NULL, HFILL}},
{&hf_ardp_nul_flag,
{"NUL", "ardp.hdr.NUL",
FT_BOOLEAN, 8, NULL, ARDP_NUL,
NULL, HFILL}},
{&hf_ardp_unused_flag,
{"UNUSED", "ardp.hdr.UNUSED",
FT_BOOLEAN, 8, NULL, ARDP_UNUSED,
NULL, HFILL}},
{&hf_ardp_version_field,
{"VER", "ardp.hdr.ver",
FT_UINT8, BASE_HEX, NULL, ARDP_VER,
NULL, HFILL}},
{&hf_ardp_hlen,
{"Header Length", "ardp.hdr.hlen",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_src,
{"Source Port", "ardp.hdr.src",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_dst,
{"Destination Port", "ardp.hdr.dst",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_dlen,
{"Data Length", "ardp.hdr.dlen",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_seq,
{"Sequence", "ardp.hdr.seq",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_ack,
{"Acknowledge", "ardp.hdr.ack",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_ttl,
{"Time to Live", "ardp.hdr.ttl",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_lcs,
{"Last Consumed Sequence", "ardp.hdr.lcs",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_nsa,
{"Next Sequence to ACK", "ardp.hdr.nsa",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_fss,
{"Fragment Starting Sequence", "ardp.hdr.fss",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_fcnt,
{"Fragment Count", "ardp.hdr.fcnt",
FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_bmp,
{"EACK Bitmap", "ardp.hdr.bmp",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_segmax,
{"Segment Max", "ardp.hdr.segmentmax",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_segbmax,
{"Segment Buffer Max", "ardp.hdr.segmentbmax",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_dackt,
{"Receiver's delayed ACK timeout", "ardp.hdr.dackt",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}},
{&hf_ardp_options,
{"Options", "ardp.hdr.options",
FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL}},
};
static gint *ett[] = {
&ett_alljoyn_ns,
&ett_alljoyn_ns_header,
&ett_alljoyn_ns_answers,
&ett_alljoyn_ns_guid_string,
&ett_alljoyn_ns_isat_entry,
&ett_alljoyn_ns_string,
&ett_alljoyn_whohas,
&ett_alljoyn_string,
&ett_alljoyn_isat_entry,
&ett_alljoyn_mess,
&ett_alljoyn_header,
&ett_alljoyn_header_flags,
&ett_alljoyn_mess_header_field,
&ett_alljoyn_mess_header,
&ett_alljoyn_mess_body_parameters,
&ett_alljoyn_ardp
};
static ei_register_info ei[] = {
{ &ei_alljoyn_empty_arg,
{ "alljoyn.empty_arg", PI_MALFORMED, PI_ERROR,
"Argument is empty", EXPFILL }}
};
/* The following are protocols as opposed to data within a protocol. These appear
* in Wireshark a divider/header between different groups of data.
*/
/* Name service protocols. */ /* name, short name, abbrev */
proto_AllJoyn_ns = proto_register_protocol("AllJoyn Name Service Protocol", "AllJoyn NS", "ajns");
/* Message protocols */
proto_AllJoyn_mess = proto_register_protocol("AllJoyn Message Protocol", "AllJoyn", "aj");
proto_register_field_array(proto_AllJoyn_ns, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_alljoyn = expert_register_protocol(proto_AllJoyn_mess);
expert_register_field_array(expert_alljoyn, ei, array_length(ei));
/* ARDP */ /* name, short name, abbrev */
proto_AllJoyn_ardp = proto_register_protocol("AllJoyn Reliable Datagram Protocol", "AllJoyn ARDP", "ardp");
}
void
proto_reg_handoff_AllJoyn(void)
{
static gboolean initialized = FALSE;
static dissector_handle_t alljoyn_handle_ns;
static dissector_handle_t alljoyn_handle_ardp;
if(!initialized) {
alljoyn_handle_ns = create_dissector_handle(dissect_AllJoyn_name_server, proto_AllJoyn_ns);
alljoyn_handle_ardp = create_dissector_handle(dissect_AllJoyn_ardp, proto_AllJoyn_ardp);
} else {
dissector_delete_uint("udp.port", name_server_port, alljoyn_handle_ns);
dissector_delete_uint("tcp.port", name_server_port, alljoyn_handle_ns);
dissector_delete_uint("udp.port", message_port, alljoyn_handle_ardp);
dissector_delete_uint("tcp.port", message_port, alljoyn_handle_ardp);
}
dissector_add_uint("udp.port", name_server_port, alljoyn_handle_ns);
dissector_add_uint("tcp.port", name_server_port, alljoyn_handle_ns);
/* The ARDP dissector will directly call the AllJoyn message dissector if needed.
* This includes the case where there is no ARDP data. */
dissector_add_uint("udp.port", message_port, alljoyn_handle_ardp);
dissector_add_uint("tcp.port", message_port, alljoyn_handle_ardp);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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