megaco_transport
Module
megaco_transport
Module Summary
Megaco transport behaviour.
Description
The following functions should be exported from a megaco_transport
callback module:
-
send_message/2
[mandatory
] -
send_message/3
[optional
] -
resend_message/2
[optional
]
Exports
Types
Send a megaco message.
If the function returns {cancel, Reason}
, this means the transport module decided not to send the message. This is not an error. No error messages will be issued and no error counters incremented. What actions this will result in depends on what kind of message was sent.
In the case of requests, megaco will cancel the message in much the same way as if megaco:cancel
had been called (after a successfull send). The information will be propagated back to the user differently depending on how the request(s) where issued: For requests issued using megaco:call
, the info will be delivered in the return value. For requests issued using megaco:cast
the info will be delivered via a call to the callback function handle_trans_reply
.
In the case of reply, megaco will cancel the reply and information of this will be returned to the user via a call to the callback function handle_trans_ack
.
The function send_message/3
will only be called if the resend_indication
config option has been set to the value flag
. The third argument, Resend
then indicates if the message send is a resend or not.
Types
Re-send a megaco message.
Note that this function will only be called if the user has set the resend_indication
config option to true
and it is in fact a message resend. If not both of these condition's are meet, send_message
will be called.
If the function returns {cancel, Reason}
, this means the transport module decided not to send the message. This is not an error. No error messages will be issued and no error counters incremented. What actions this will result in depends on what kind of message was sent.
In the case of requests, megaco will cancel the message in much the same way as if megaco:cancel
had been called (after a successfull send). The information will be propagated back to the user differently depending on how the request(s) where issued: For requests issued using megaco:call
, the info will be delivered in the return value. For requests issued using megaco:cast
the info will be delivered via a call to the callback function handle_trans_reply
.
In the case of reply, megaco will cancel the reply and information of this will be returned to the user via a call to the callback function handle_trans_ack
.
© 2010–2017 Ericsson AB
Licensed under the Apache License, Version 2.0.