#654 (Mar 21, 2026, 5:04:00 PM)

library/HTTP_Adapter: clarify response template restriction

Change-Id: I1a5ee842c30de9ec22d9e375f6b1b24b3eaee1e0

library/HTTP_Adapter: bail out early on failure

Replace `self.stop` with `Misc_Helpers.f_shutdown()`, and add it after
existing `setverdict(fail, ...)` calls that previously fell through.

In all these cases there is no meaningful way to continue: the caller
of these functions usually expects a valid value to be returned, and
continuing (not stopping) oftentimes results in confusing DTEs.

Change-Id: I229028d551d5cf9651e6e65314cd40f414bfe235

s1gw: f_REST_*(): use tr_HTTP_RespBody(decmatch T:?)

Pass `exp := tr_HTTP_RespBody(decmatch T:?)` to f_http_transact() in
every REST helper that decodes the response body.  This ensures both
a 2xx status code and a decodable body are required before any decode
attempt is made, producing an informative "Unexpected HTTP response"
verdict (rather than a confusing DTE) when e.g. an older osmo-s1gw
returns HTTP 404 with an empty body for an unsupported endpoint.

Change-Id: I6997dae5314d4a4588386183832426ab5b8d0843

eIM_Tests: align RSP version number in HTTP header

The RSP version number in the x-admin-protocol header string should
be set to v.2.1.0 (gsma/rsp/v2.1.0), even though the ASN.1 spec we
currently use is at version 2.5.

This is to maintain compatibility with older IPAd versions and also
stated explicitly in GSMA SGP.32 V2.1, section 6.1.

Change-Id: I125c3b13697c71d35788e54b7d88a9f943bb7a71
Related: SYS#7945