20002016 Ericsson AB. All Rights Reserved. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. megaco_tcp Lars Thorsén Lars Thorsén Lars Thorsén 2007-06-15 %VSN% megaco_tcp.xml
megaco_tcp Interface module to TPKT transport protocol for Megaco/H.248.

This module contains the public interface to the TPKT (TCP/IP) version transport protocol for Megaco/H.248.

 start_transport() -> {ok, TransportRef} TransportRef = pid()

This function is used for starting the TCP/IP transport service. Use exit(TransportRef, Reason) to stop the transport service.

 listen(TransportRef, ListenPortSpecList) -> ok TransportRef = pid() | regname() OptionListPerPort = [Option] Option = {port, integer()} |{options, list()} |{receive_handle, term()}

This function is used for starting new TPKT listening socket for TCP/IP. The option list contains the socket definitions.

 connect(TransportRef, OptionList) -> {ok, Handle, ControlPid} | {error, Reason} TransportRef = pid() | regname() OptionList = [Option] Option = {host, Ipaddr} | {port, integer()} |{options, list()} |{receive_handle, term()} |{module, atom()} Handle = socket_handle() ControlPid = pid() Reason = term()

This function is used to open a TPKT connection.

The option makes it possible for the user to provide their own callback module. The or functions of this module is called when a new message is received (which one depends on the size of the message; small - receive_message, large - process_received_message). Default value is megaco.

 close(Handle) -> ok Handle = socket_handle()

This function is used for closing an active TPKT connection.

 socket(Handle) -> Socket Handle = socket_handle() Socket = inet_socket()

This function is used to convert a socket_handle() to a inet_socket(). inet_socket() is a plain socket, see the inet module for more info.

 send_message(Handle, Message) -> ok Handle = socket_handle() Message = binary() | iolist()

Sends a message on a connection.

 block(Handle) -> ok Handle = socket_handle()

Stop receiving incoming messages on the socket.

 unblock(Handle) -> ok Handle = socket_handle()

Starting to receive incoming messages from the socket again.

 upgrade_receive_handle(ControlPid) -> ok ControlPid = pid()

Update the receive handle of the control process (e.g. after having changed protocol version).

 get_stats() -> {ok, TotalStats} | {error, Reason} get_stats(SendHandle) -> {ok, SendHandleStats} | {error, Reason} get_stats(SendHandle, Counter) -> {ok, CounterStats} | {error, Reason} TotalStats = [send_handle_stats()] total_stats() = {send_handle(), [stats()]} SendHandle = send_handle() SendHandleStats = [stats()] Counter = tcp_stats_counter() CounterStats = integer() stats() = {tcp_stats_counter(), integer()} tcp_stats_counter() = medGwyGatewayNumInMessages | medGwyGatewayNumInOctets | medGwyGatewayNumOutMessages | medGwyGatewayNumOutOctets | medGwyGatewayNumErrors Reason = term()

Retreive the TCP related (SNMP) statistics counters.

 reset_stats() -> void() reset_stats(SendHandle) -> void() SendHandle = send_handle()

Reset all TCP related (SNMP) statistics counters.