This appears to have been accidentally added in commit
79ebcb104b92fa37ed291e96ab2d611f297e6078 which sought to provide a
mechanism for disabling Sofia's chat interface. The abort(3) here
achieved that a bit too well.
I found a problem here but it may not completely match your expectations.
I reviewed the RFC 4028 and checked against the code and I discovered we should not be putting a Min-SE in any response at all besides a 422:
section 5:
The Min-SE header field MUST NOT be used in responses except for
those with a 422 response code. It indicates the minimum value of
the session interval that the server is willing to accept.
I corrected this problem and implemented the 422 response so if you request a value lower than the minimum specified for the profile.
If the value is equal or higher to the minimum, it will be reflected in the Session-Expires header in the response and no Min-SE will be present.
Adds app: enable_keepalive 0|<seconds>
This app can be run in the dialplan or with execute_on_* type variables for B-legs.
Adds sofia param: keepalive-method : defaults to MESSAGE can also be "INFO"
This param sets which SIP method to use.
These all were set before but now are disabled by default because they are not proper to have enabled without a good reason.
tcp-unreg-on-socket-close
If registration is TCP or TLS and socket connection is interrupted, unregister the client.
tcp-always-nat
Treat all TCP connections as NATTED, this causes all traffic back to the phone to reuse the existing TCP socket but may
cause problems when not used with TCP keepalive.
tls-always-nat
Same as tcp-always-nat but only for TLS connections.
Copy URI params from Refer-To header into custom header in subsequent INVITE
sip_h_X-FS-Refer-Params is set to show up in the INVITE as X-FS-Refer-Params
rtp_secure_media=mandatory
rtp_secure_media=optional
rtp_secure_media=mandatory:AES_CM_256_HMAC_SHA1_80,AES_CM_256_HMAC_SHA1_32
rtp_secure_media=optional:AES_CM_256_HMAC_SHA1_80
rtp_secure_media=forbidden
true implies mandatory
false implies forbidden
not set implies optional
rtp_secure_media_inbound or rtp_secure_media_outbound take precedence and are treated the same way based on leg direction
