[SMF,MME] Gn: Set Maximum SDU Size QoS field to 1500

Before this patch, it was set as 0, which is Reserved in Network to MS direction.
pespin · Jan 26, 2024 · a2c2869 · a2c2869
1 parent ce184d9
commit a2c2869
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diff --git a/src/mme/mme-gn-build.c b/src/mme/mme-gn-build.c
@@ -71,6 +71,9 @@ static void build_qos_profile_from_session(ogs_gtp1_qos_profile_decoded_t *qos_p
 
     qos_pdec->qos_profile.data.delivery_erroneous_sdu = OGS_GTP1_DELIVERY_ERR_SDU_NO;
 
+    /* Maximum SDU Size: Encode it as 1500, the maximum for IP 3GPP TS 23.107 Table 4, Note 4) */
+    qos_pdec->qos_profile.data.max_sdu_size = 0x96;
+
      /* 3GPP TS 23.401 Annex E table Table E.3 */
     /* Also take into account table 7 in 3GPP TS 23.107 9.1.2.2 */
     switch (session->qos.index) { /* QCI */

diff --git a/src/smf/gn-build.c b/src/smf/gn-build.c
@@ -41,6 +41,14 @@ static void build_qos_profile_from_session(ogs_gtp1_qos_profile_decoded_t *qos_p
 
     qos_pdec->qos_profile.data.delivery_erroneous_sdu = OGS_GTP1_DELIVERY_ERR_SDU_NO;
 
+    /* Maximum SDU Size: If value is set to a valid value, reuse it: */
+    if (sess->gtp.v1.qos_pdec.qos_profile.data.max_sdu_size >= 0x01 &&
+        sess->gtp.v1.qos_pdec.qos_profile.data.max_sdu_size <= 0x99) {
+        qos_pdec->qos_profile.data.max_sdu_size = sess->gtp.v1.qos_pdec.qos_profile.data.max_sdu_size;
+    } else { /* Encode it as 1500, the maximum for IP 3GPP TS 23.107 Table 4, Note 4) */
+        qos_pdec->qos_profile.data.max_sdu_size = 0x96;
+    }
+
      /* 3GPP TS 23.401 Annex E table Table E.3 */
     /* Also take into account table 7 in 3GPP TS 23.107 9.1.2.2 */
     switch (sess->session.qos.index) { /* QCI */