sgsn: Store subscribed QoS and attempt to use it
sgsn_create_pdp_ctx should use the subscribed QoS. When selecting
the PDP context we inject the QoS to be used into the TLV structure
and use it during the request. Assume a "qos-Subscribed" structure
only with three bytes and prepend the Allocation/Retention policy
to the request.
diff --git a/openbsc/src/gprs/sgsn_libgtp.c b/openbsc/src/gprs/sgsn_libgtp.c
index 25b30d0..dd02457 100644
--- a/openbsc/src/gprs/sgsn_libgtp.c
+++ b/openbsc/src/gprs/sgsn_libgtp.c
@@ -123,6 +123,8 @@
struct sgsn_pdp_ctx *pctx;
struct pdp_t *pdp;
uint64_t imsi_ui64;
+ size_t qos_len;
+ const uint8_t *qos;
int rc;
LOGP(DGPRS, LOGL_ERROR, "Create PDP Context\n");
@@ -188,12 +190,20 @@
memcpy(pdp->pco_req.v, TLVP_VAL(tp, GSM48_IE_GSM_PROTO_CONF_OPT),
pdp->pco_req.l);
- /* QoS options from GMM */
- pdp->qos_req.l = TLVP_LEN(tp, OSMO_IE_GSM_REQ_QOS);
+ /* QoS options from GMM or remote */
+ if (TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS) > 0) {
+ qos_len = TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS);
+ qos = TLVP_VAL(tp, OSMO_IE_GSM_SUB_QOS);
+ } else {
+ qos_len = TLVP_LEN(tp, OSMO_IE_GSM_REQ_QOS);
+ qos = TLVP_VAL(tp, OSMO_IE_GSM_REQ_QOS);
+ }
+
+ pdp->qos_req.l = qos_len + 1;
if (pdp->qos_req.l > sizeof(pdp->qos_req.v))
pdp->qos_req.l = sizeof(pdp->qos_req.v);
- memcpy(pdp->qos_req.v, TLVP_VAL(tp, OSMO_IE_GSM_REQ_QOS),
- pdp->qos_req.l);
+ pdp->qos_req.v[0] = 0; /* Allocation/Retention policy */
+ memcpy(&pdp->qos_req.v[1], qos, pdp->qos_req.l - 1);
/* SGSN address for control plane */
pdp->gsnlc.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr);