[Linphone-developers] IO ERROR:could not send UDP packet because [Operation not permitted]

[amit Kumar]

Hi All,

Sometime,Our voipClient(using liblinphone) is not able to send UDP KEEP ALIVE PACKET to server ,we see error as "could not send UDP packet because [Operation not permitted]". Due to this reason we are getting IO error "reason [io error] for proxy [sip:<sip address:5060>".

In case of IO ERROR(For example network down etc), voipClient(using liblinphone) try to recover after "Reseting transports" and send REGISTER message again.

But in case of IO ERROR"could not send UDP packet because [Operation not permitted]", voipClient(using liblinphone) is not able to register again and keep on getting error "error: Operation not permitted " again and again. Some of the time its take 30 minute to REGISTER again. Please have a look on the below logs. Please help me is this regard. due to this Reason, sometime voipClient (using liblinphone) does not get call.Please advice.

I am using version "3.2.5".

LOGS:

2017-09-01 12:42:24:745 MESSAGE channel [0x5597673740]: keep alive sent to [UDP://stagingreachme.instavoice.com:5060]
2017-09-01 12:42:34:795 MESSAGE channel [0x5597673740]: keep alive sent to [UDP://stagingreachme.instavoice.com:5060]
2017-09-01 12:42:44:845 MESSAGE channel [0x5597673740]: keep alive sent to [UDP://stagingreachme.instavoice.com:5060]
2017-09-01 12:42:54:896 MESSAGE channel [0x5597673740]: keep alive sent to [UDP://stagingreachme.instavoice.com:5060]
2017-09-01 12:43:04:925 MESSAGE channel [0x5597673740]: keep alive sent to [UDP://stagingreachme.instavoice.com:5060]
2017-09-01 12:43:14:977 MESSAGE channel [0x5597673740]: keep alive sent to [UDP://stagingreachme.instavoice.com:5060]
2017-09-01 12:43:25:005 ERROR channel [0x5597673740]: could not send UDP packet because [Operation not permitted]
2017-09-01 12:43:25:010 ERROR channel [0x5597673740]: could not send [4] bytes of keep alive from [UDP://10.102.123.99:57663]  to [<sip:sip address>:5060]
2017-09-01 12:43:25:011 MESSAGE channel 0x5597673740: state ERROR
2017-09-01 12:43:25:066 MESSAGE refresher [0x55979bfc00] has channel [0x5597673740] in state [ERROR], reporting error
2017-09-01 12:43:25:066 MESSAGE Refresher[0x55979bfc00]: scheduling next timer in 500 ms for purpose [retry]
2017-09-01 12:43:25:066 MESSAGE Register refresher [503] reason [io error] for proxy[<sip:sip address>:5060]
2017-09-01 12:43:25:066 MESSAGE Refresher[0x55979bfc00]: scheduling next timer in 500 ms for purpose [retry]
2017-09-01 12:43:25:066 MESSAGE Register refresher [503] reason [io error] for proxy[<sip:sip address>:5060]

AFTER ABOVE ERROR, voipClient(using liblinphone) try to register and we keep getting error"error: Operation not permitted " for 30 or more minute before successful REGISTRATION

Thanks,

Amit