[asterisk-bugs] [JIRA] (ASTERISK-26625) All PJSIP calls rejected with 'Unable to allocate RTP socket: Address family not supported by protocol'

[Alexei Gradinari (JIRA)]

Alexei Gradinari created ASTERISK-26625:
-------------------------------------------

             Summary: All PJSIP calls rejected with 'Unable to allocate RTP socket: Address family not supported by protocol'
                 Key: ASTERISK-26625
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26625
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Resources/res_pjsip_sdp_rtp
    Affects Versions: 13.13.0
         Environment: Linux 4.8.3
# CONFIG_IPV6 is not set
            Reporter: Alexei Gradinari
            Severity: Critical


If the IPV6 is not supported the asterisk rejects all PJSIP calls with next errors:
{noformat}
WARNING[28163] res_rtp_asterisk.c: Unable to allocate RTP socket: Address family not supported by protocol
WARNING[28163] res_rtp_asterisk.c: Failed to create a new socket for RTP instance '0x3cfb060'
ERROR[28163] res_pjsip_sdp_rtp.c: Unable to create RTP instance using RTP engine 'asterisk'
{noformat}

The endpoint is configured with
{noformat}
 bind_rtp_to_media_address          : false
 media_address                      : 
{noformat}

It's because the res_pjsip_sdp_rtp.c on load_module set default address to "::" which is the IPV6 address, then in a create_rtp a function 'ast_rtp_instance_new' is called with this IPV6 address.

The function ast_rtp_new in res_rtp_asterisk.c checks sockaddr type and calls a function create_new_socket with a domain AF_INET6.
The function create_new_socket calls socket with domain AF_INET6,
as the IPV6 is not supported by the system, we got "Address family not supported by protocol"



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