pespin has submitted this change. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/37273?usp=email )

Change subject: asterisk: IMS: validate ICSI present in INVITE Contact header ......................................................................

asterisk: IMS: validate ICSI present in INVITE Contact header

Related: SYS#6984 Change-Id: I630f0aaef0436ea1c12e8fffef7a5c657cfcc35c --- M asterisk/IMS_ConnectionHandler.ttcn 1 file changed, 16 insertions(+), 3 deletions(-)

Approvals: pespin: Looks good to me, approved Jenkins Builder: Verified

diff --git a/asterisk/IMS_ConnectionHandler.ttcn b/asterisk/IMS_ConnectionHandler.ttcn index 58ca87a..4f87f95 100644 --- a/asterisk/IMS_ConnectionHandler.ttcn +++ b/asterisk/IMS_ConnectionHandler.ttcn @@ -452,13 +452,16 @@ } for (var integer i := 0; i < lengthof(caddrs); i := i + 1) { var ContactAddress caddr := caddrs[i]; - /* "The UE must include the audio media feature tag, as defined in IETF RFC 3840, - * in the Contact header field of the SIP INVITE request, and in the Contact header - * field of the SIP response to the SIP INVITE request" */ if (not ispresent(caddr.contactParams)) { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str(g_name & ": Received unexpected empty Contact attributes (omit)")); } + /* GSMA FCM.01 3.2.3.3: "The INVITE request contains Within the Contact header [...] the IMS + * Communication Service Identifier's (ICSI) for IMS Multimedia Telephony" */ + f_sip_param_match_value_or_fail(caddr.contactParams, "+g.3gpp.icsi-ref", ""urn\%3Aurn-7\%3A3gpp-service.ims.icsi.mmtel""); + /* "The UE must include the audio media feature tag, as defined in IETF RFC 3840, + * in the Contact header field of the SIP INVITE request, and in the Contact header + * field of the SIP response to the SIP INVITE request" */ f_sip_param_match_value_or_fail(caddr.contactParams, "audio", omit); } }