proto_msrp Module

The following modules must be loaded before this module:

The following libraries or applications must be installed before running OpenSIPS with this module loaded:

Time in milliseconds after a MSRP connection will be closed if it is not available for blocking writing in this interval (and OpenSIPS wants to send something on it).

Default value is 100 ms.

...
modparam("proto_msrp", "send_timeout", 200)
...

The maximum number of chunks that a SIP message is expected to arrive via MSRP. If a packet is received more fragmented than this, the connection is dropped (either the connection is very overloaded and this leads to high fragmentation - or we are the victim of an ongoing attack where the attacker is sending the traffic very fragmented in order to decrease our performance).

Default value is 4.

...
modparam("proto_msrp", "max_msg_chunks", 8)
...

Sets the timeout (in milliseconds) for the SSL handshake sequence to complete. It may be necessary to increase this value when using a CPU intensive cipher for the connection to allow time for keys to be generated and processed.

The timeout is invoked during acceptance of a new connection (inbound) and during the wait period when a new session is being initiated (outbound).

Default value is 100.

param("proto_msrp", "tls_handshake_timeout", 200) # number of milliseconds

			

This parameter turns on or off the extra checking/matching of the TLS domain (SSL certificate) when comes to reusing an existing TLS connection. Without this extra check, only IP and port of the connections will be check (in order to re-use an existing connection). With this extra check, the connection to be reused must have the same SSL certificate as the one set for the current signaling operation.

This checking is done only when comes to send SIP traffic via TLS and it is applied only against connections that were created / initiated by OpenSIPS (as TLS client). Any accepte connection (as TLS server) will automatically match (the extra test will be skipped).

Default value is 0 (disabled).

...
modparam("proto_msrp", "cert_check_on_conn_reusage", 1)
...

Trace destination as defined in the tracing module. Currently the only tracing module is proto_hep. Network events such as connect, accept and connection closed events shall be traced along with errors that could appear in the process.

WARNING: A tracing module must be loaded in order for this parameter to work. (for example proto_hep).

Default value is none(not defined).

...
modparam("proto_hep", "hep_id", "[hep_dest]10.0.0.2;transport=tcp;version=3")

modparam("proto_msrp", "trace_destination", "hep_dest")
...

This controls whether tracing for MSRP is on or not. You still need to define Section 1.3.5, “trace_destination (string)”in order to work, but this value will be controlled using MI function Section 1.4.1, “ msrp_trace ”.

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modparam("proto_msrp", "trace_on", 1)
...

Define the name of a route in which you can filter which connections will be trace and which connections won't be. In this route you will have information regarding source and destination ips and ports for the current connection. To disable tracing for a specific connection the last call in this route must be drop, any other exit mode resulting in tracing the current connection ( of course you still have to define a Section 1.3.5, “trace_destination (string)” and trace must be on at the time this connection is opened.

IMPORTANT Filtering on ip addresses and ports can be made using $si and $sp for matching either the entity that is connecting to OpenSIPS or the entity to which OpenSIPS is connecting. The name might be misleading ( $si meaning the source ip if you read the docs) but in reality it is simply the socket other than the OpenSIPS socket. In order to match OpenSIPS interface (either the one that accepted the connection or the one that initiated a connection) $socket_in(ip) (ip) and $socket_in(port) (port) can be used.

WARNING: IF Section 1.3.6, “trace_on (int)” is set to 0 or tracing is deactived via the mi command Section 1.4.1, “ msrp_trace ” this route won't be called.

...
modparam("proto_msrp", "trace_filter_route", "msrp_filter")
...
/* all MSRP connections will go through this route if tracing is activated
 * and a trace destination is defined */
route[msrp_filter] {
	...
	/* all connections opened from/by ip 1.1.1.1:8000 will be traced
	   on interface 1.1.1.10:5060(opensips listener)
	   all the other connections won't be */
	 if ( $si == "1.1.1.1" && $sp == 8000 &&
		$socket_in(ip) == "1.1.1.10"  && $socket_in(port) == 5060)
		exit;
	else
		drop;
}
...

Name: msrp_trace

Parameters:

MI FIFO Command Format:

			:msrp_trace:_reply_fifo_file_
			trace_mode
			_empty_line_