Hi,

The Invalid Argument error usually results when trying to send to a non
local address from a socket that is listening on 127.0.0.1.

Regards,
Emil

Am Wed, 15 May 2013 18:53:08 +0300
schrieb Vassilis Radis <[email protected]>:

> Hello , I ve setup my sems on the same box with a kamailio.
> 
> Kamailio is bound to the public IP and SEMS to 127.0.0.1
> I am only using SBC profile. In sems.conf I have
> 
> sip_ip: 127.0.0.1:5757
> media_ip: <public_ip_of_the_box>
> 
> and next_hops and outbound_proxy are not set.
> 
> A call comes from outside into kamailio which sends it to sems for
> SBCing. Sems decides the next hop by looking into application
> parameter headers that are set by kamailio.
> Communication between kamailio and sems is fine. The problem is that
> SEMS cannot send its initial INVITE to outside world: In the debug
> messages it reports that it checks the DNS of the next_hop, it calls
> send_to and then send_to function returns "Invalid argument" which
> causes SEMS to report a 400 Bad request back to Kamailio:
> 
> May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [send_request,
> trans_layer.cpp:980] DEBUG: Sending to x.x.x.x:5060 <INVITE
> sip:[email protected]:...>
> May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [send,
> transport.cpp:109] DEBUG: send  msg
> May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [send,
> transport.cpp:125] ERROR: sendto: Invalid argument
> May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [send_request,
> trans_layer.cpp:988] ERROR: Error from transport layer
> May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [sendRequest,
> AmSipDialog.cpp:1135] ERROR: Could not send request: method=INVITE;
> call-id=2CCEB7CF-5193AD9700045DF0-B5CFEB40; cseq=10
> May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [onB2BEvent,
> AmB2BSession.cpp:1254] DEBUG: sending INVITE failed, relaying back
> error reply
> May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [onB2BEvent,
> AmB2BSession.cpp:1259] DEBUG: relaying B2B SIP reply 400 Bad Request
> 
> Any ideas?
> 
> Thanks a lot,
> Bill



-- 
Emil Kroymann
VoIP Services Engineer

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