[SGsAP] add MM-INFORMATION-REQUEST(Discard by Option2)

src/mme/sgsap-handler.c

@@ -479,3 +479,59 @@ void sgsap_handle_release_request(mme_vlr_t *vlr, ogs_pkbuf_t *pkbuf)
         ogs_warn("Unknown IMSI[%s]", imsi_bcd);
 
 }
+
+void sgsap_handle_mm_information_request(mme_vlr_t *vlr, ogs_pkbuf_t *pkbuf)
+{
+    ogs_tlv_t *root = NULL, *iter = NULL;
+    mme_ue_t *mme_ue = NULL;
+
+    char imsi_bcd[MAX_IMSI_BCD_LEN+1];
+
+    nas_mobile_identity_imsi_t *nas_mobile_identity_imsi = NULL;
+    int nas_mobile_identity_imsi_len = 0;
+
+    ogs_assert(vlr);
+    ogs_assert(pkbuf);
+
+    ogs_debug("[SGSAP] MM-INFORMATION-REQUEST(DISCARD by OPTION2)");
+
+    ogs_pkbuf_pull(pkbuf, 1);
+
+    root = ogs_tlv_parse_block(pkbuf->len, pkbuf->data, OGS_TLV_MODE_T1_L1);
+    ogs_assert(root);
+
+    iter = root;
+    while (iter) {
+        switch (iter->type) {
+        case SGSAP_IE_IMSI_TYPE:
+            nas_mobile_identity_imsi = iter->value;
+            nas_mobile_identity_imsi_len = iter->length;
+            break;
+        case SGSAP_IE_MM_INFORMATION_TYPE:
+            /* TODO */
+            break;
+        default:
+            ogs_warn("Invalid Type [%d]", iter->type);
+            break;
+        }
+        iter = iter->next;
+    }
+
+    ogs_tlv_free_all(root);
+
+    ogs_assert(nas_mobile_identity_imsi);
+    ogs_assert(nas_mobile_identity_imsi_len == SGSAP_IE_IMSI_LEN);
+
+    if (nas_mobile_identity_imsi->type == NAS_MOBILE_IDENTITY_IMSI) {
+
+        nas_imsi_to_bcd(nas_mobile_identity_imsi,
+                nas_mobile_identity_imsi_len, imsi_bcd);
+        mme_ue = mme_ue_find_by_imsi_bcd(imsi_bcd);
+    } else 
+        ogs_assert_if_reached();
+
+    if (mme_ue)
+        ogs_debug("    IMSI[%s]", mme_ue->imsi_bcd);
+    else
+        ogs_warn("Unknown IMSI[%s]", imsi_bcd);
+}

src/mme/sgsap-handler.h

@@ -33,6 +33,7 @@ void sgsap_handle_paging_request(mme_vlr_t *vlr, ogs_pkbuf_t *pkbuf);
 void sgsap_handle_downlink_unitdata(mme_vlr_t *vlr, ogs_pkbuf_t *pkbuf);
 void sgsap_handle_reset_indication(mme_vlr_t *vlr, ogs_pkbuf_t *pkbuf);
 void sgsap_handle_release_request(mme_vlr_t *vlr, ogs_pkbuf_t *pkbuf);
+void sgsap_handle_mm_information_request(mme_vlr_t *vlr, ogs_pkbuf_t *pkbuf);
 
 #ifdef __cplusplus
 }

src/mme/sgsap-sm.c

@@ -172,6 +172,9 @@ void sgsap_state_connected(ogs_fsm_t *s, mme_event_t *e)
         case SGSAP_RELEASE_REQUEST:
             sgsap_handle_release_request(vlr, pkbuf);
             break;
+        case SGSAP_MM_INFORMATION_REQUEST:
+            sgsap_handle_mm_information_request(vlr, pkbuf);
+            break;
         default:
             ogs_warn("Unknown Message Type: [%d]", type);
             break;

src/mme/sgsap-types.h

@@ -40,6 +40,7 @@ extern "C" {
 #define SGSAP_RESET_INDICATION                                      21
 #define SGSAP_RESET_ACK                                             22
 #define SGSAP_MO_CSFB_INDICIATION                                   24
+#define SGSAP_MM_INFORMATION_REQUEST                                26
 #define SGSAP_RELEASE_REQUEST                                       27
 #define SGSAP_UE_UNREACHABLE                                        31
 
@@ -64,6 +65,7 @@ extern "C" {
 #define SGSAP_IE_IMSI_DETACH_INDICATION_TYPE                        17
 #define SGSAP_IE_IMSI_DETACH_INDICATION_LEN                         1
 #define SGSAP_IE_NAS_MESSAGE_CONTAINER_TYPE                         22
+#define SGSAP_IE_MM_INFORMATION_TYPE                                23
 #define SGSAP_IE_SERVICE_INDICATOR_TYPE                             32
 #define SGSAP_IE_SERVICE_INDICATOR_LEN                              1
 #define SGSAP_IE_TAI_TYPE                                           35

tests/common/test-packet.c

@@ -3464,16 +3464,16 @@ int testsgsap_downlink_unitdata(ogs_pkbuf_t **pkbuf, int i)
 int testsgsap_mm_information_request(ogs_pkbuf_t **pkbuf, int i)
 {
     char *payload[TESTS1AP_MAX_MESSAGE] = {
-        "",
         "1a01087942120000 0000301714430483 d46413450483d464 1347917071028401"
         "29",
         "",
+        "",
 
     };
     uint16_t len[TESTS1AP_MAX_MESSAGE] = {
-        0,
         33,
         0,
+        0,
     };
     char hexbuf[MAX_SDU_LEN];
     

tests/common/test-packet.h

@@ -145,6 +145,7 @@ int testsgsap_paging_request(ogs_pkbuf_t **pkbuf, int i);
 int testsgsap_reset_indication(ogs_pkbuf_t **pkbuf, int i);
 int testsgsap_release_request(ogs_pkbuf_t **pkbuf, int i);
 int testsgsap_downlink_unitdata(ogs_pkbuf_t **pkbuf, int i);
+int testsgsap_mm_information_request(ogs_pkbuf_t **pkbuf, int i);
 
 #ifdef __cplusplus
 }

tests/csfb/crash-test.c

@@ -208,6 +208,12 @@ static void test1_func(abts_case *tc, void *data)
     ABTS_PTR_NOTNULL(tc, recvbuf);
     ogs_pkbuf_free(recvbuf);
 
+    /* Send SGsAP-MM-INFORMATION-REQUEST */
+    rv = testsgsap_mm_information_request(&sendbuf, 0);
+    ABTS_INT_EQUAL(tc, OGS_OK, rv);
+    rv = testvlr_sgsap_send(sgsap, sendbuf);
+    ABTS_INT_EQUAL(tc, OGS_OK, rv);
+
     /* Retreive M-TMSI */
     enb_ue = enb_ue_find_by_mme_ue_s1ap_id(248);
     ogs_assert(enb_ue);