FS-6462 --resolve

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.

diff --git a/libs/sofia-sip/libsofia-sip-ua/nua/nua_session.c b/libs/sofia-sip/libsofia-sip-ua/nua/nua_session.c
index f0b4d35d58bb113285a8f031c1e175be1d6d4818..2238aced40412f82bc9336d8521442aac4daf67f 100644 (file)
--- a/libs/sofia-sip/libsofia-sip-ua/nua/nua_session.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nua/nua_session.c
@@ -4502,9 +4502,9 @@ session_timer_add_headers(struct session_timer *t,
 
   sip_add_tl(msg, sip,
                         TAG_IF(expires != 0, SIPTAG_SESSION_EXPIRES(x)),
-                        TAG_IF(min != 0
+                        TAG_IF((!uas || sip->sip_status->st_status == 422) && (min != 0
                                        /* Min-SE: 0 is optional with initial INVITE */
-                                       || !initial,
+                                        || !initial),
                                        SIPTAG_MIN_SE(min_se)),
                         TAG_IF(autorequire && refresher == nua_remote_refresher && expires != 0, SIPTAG_REQUIRE_STR("timer")),
                         TAG_END());

diff --git a/src/mod/endpoints/mod_sofia/sofia.c b/src/mod/endpoints/mod_sofia/sofia.c
index f30f2962767f6b7628aaea292a25fbd8efc6d2c9..1d724bfd890a4a8f1c8a2ab10701e7fdfbf7ff6b 100644 (file)
--- a/src/mod/endpoints/mod_sofia/sofia.c
+++ b/src/mod/endpoints/mod_sofia/sofia.c
@@ -1819,6 +1819,16 @@ void sofia_event_callback(nua_event_t event,
        case nua_i_notify:
        case nua_i_info:
 
+               
+               if (event == nua_i_invite) {
+                       if (sip->sip_min_se && profile->minimum_session_expires) {
+                               if (sip->sip_min_se->min_delta < profile->minimum_session_expires) {
+                                       nua_respond(nh, SIP_422_SESSION_TIMER_TOO_SMALL, NUTAG_MIN_SE(profile->minimum_session_expires), TAG_END());
+                                       goto end;
+                               }
+                       }
+               }
+
                if (!sofia_private) {
 
                        if (sess_count >= sess_max || !sofia_test_pflag(profile, PFLAG_RUNNING) || !switch_core_ready_inbound()) {
@@ -2538,6 +2548,7 @@ void *SWITCH_THREAD_FUNC sofia_profile_thread_run(switch_thread_t *thread, void
 #endif
                                   NUTAG_APPL_METHOD("MESSAGE"),
 
+                                  TAG_IF(profile->session_timeout && profile->minimum_session_expires, NUTAG_MIN_SE(profile->minimum_session_expires)),
                                   NUTAG_SESSION_TIMER(profile->session_timeout),
                                   NTATAG_MAX_PROCEEDING(profile->max_proceeding),
                                   TAG_IF(profile->pres_type, NUTAG_ALLOW("PUBLISH")),