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Diffstat (limited to 'openbsc/src/gprs_bssgp.c')
-rw-r--r--openbsc/src/gprs_bssgp.c63
1 files changed, 42 insertions, 21 deletions
diff --git a/openbsc/src/gprs_bssgp.c b/openbsc/src/gprs_bssgp.c
index 330d8c87..6bba1af8 100644
--- a/openbsc/src/gprs_bssgp.c
+++ b/openbsc/src/gprs_bssgp.c
@@ -255,7 +255,7 @@ static int bssgp_rx_bvc_reset(struct msgb *msg, struct tlv_parsed *tp,
}
/* Uplink unit-data */
-static int bssgp_rx_ul_ud(struct msgb *msg, u_int16_t bvci)
+static int bssgp_rx_ul_ud(struct msgb *msg)
{
struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg);
int data_len = msgb_l3len(msg) - sizeof(*budh);
@@ -273,12 +273,14 @@ static int bssgp_rx_ul_ud(struct msgb *msg, u_int16_t bvci)
!TLVP_PRESENT(&tp, BSSGP_IE_LLC_PDU))
return -EIO;
+ /* FIXME: lookup bssgp_bts_ctx based on BVCI + NSEI */
+
msgb_llch(msg) = TLVP_VAL(&tp, BSSGP_IE_LLC_PDU);
return gprs_llc_rcvmsg(msg, &tp);
}
-static int bssgp_rx_suspend(struct msgb *msg, u_int16_t bvci)
+static int bssgp_rx_suspend(struct msgb *msg)
{
struct bssgp_normal_hdr *bgph =
(struct bssgp_normal_hdr *) msgb_bssgph(msg);
@@ -296,11 +298,11 @@ static int bssgp_rx_suspend(struct msgb *msg, u_int16_t bvci)
!TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA))
return -EIO;
+ /* FIXME: pass the SUSPEND request to GMM */
/* SEND SUSPEND_ACK or SUSPEND_NACK */
- /* FIXME */
}
-static int bssgp_rx_resume(struct msgb *msg, u_int16_t bvci)
+static int bssgp_rx_resume(struct msgb *msg)
{
struct bssgp_normal_hdr *bgph =
(struct bssgp_normal_hdr *) msgb_bssgph(msg);
@@ -319,12 +321,11 @@ static int bssgp_rx_resume(struct msgb *msg, u_int16_t bvci)
!TLVP_PRESENT(&tp, BSSGP_IE_SUSPEND_REF_NR))
return -EIO;
+ /* FIXME: pass the RESUME request to GMM */
/* SEND RESUME_ACK or RESUME_NACK */
- /* FIXME */
}
-static int bssgp_rx_fc_bvc(struct msgb *msg, struct tlv_parsed *tp,
- u_int16_t ns_bvci)
+static int bssgp_rx_fc_bvc(struct msgb *msg, struct tlv_parsed *tp)
{
DEBUGP(DGPRS, "BSSGP FC BVC\n");
@@ -336,22 +337,27 @@ static int bssgp_rx_fc_bvc(struct msgb *msg, struct tlv_parsed *tp,
!TLVP_PRESENT(tp, BSSGP_IE_R_DEFAULT_MS))
return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
+ /* FIXME: actually implement flow control */
+
/* Send FLOW_CONTROL_BVC_ACK */
return bssgp_tx_fc_bvc_ack(msgb_nsei(msg), *TLVP_VAL(tp, BSSGP_IE_TAG),
- ns_bvci);
+ msgb_bvci(msg));
}
/* We expect msgb_bssgph() to point to the BSSGP header */
-int gprs_bssgp_rcvmsg(struct msgb *msg, u_int16_t ns_bvci)
+int gprs_bssgp_rcvmsg(struct msgb *msg)
{
struct bssgp_normal_hdr *bgph =
(struct bssgp_normal_hdr *) msgb_bssgph(msg);
struct tlv_parsed tp;
- u_int8_t pdu_type = bgph->pdu_type;
+ uint8_t pdu_type = bgph->pdu_type;
int data_len = msgb_l3len(msg) - sizeof(*bgph);
- u_int16_t bvci;
+ uint16_t bvci; /* PTP BVCI */
+ uint16_t ns_bvci = msgb_bvci(msg);
int rc = 0;
+ /* Identifiers from DOWN: NSEI, BVCI (both in msg->cb) */
+
/* UNITDATA BSSGP headers have TLLI in front */
if (pdu_type != BSSGP_PDUT_UL_UNITDATA &&
pdu_type != BSSGP_PDUT_DL_UNITDATA)
@@ -360,7 +366,7 @@ int gprs_bssgp_rcvmsg(struct msgb *msg, u_int16_t ns_bvci)
switch (pdu_type) {
case BSSGP_PDUT_UL_UNITDATA:
/* some LLC data from the MS */
- rc = bssgp_rx_ul_ud(msg, ns_bvci);
+ rc = bssgp_rx_ul_ud(msg);
break;
case BSSGP_PDUT_RA_CAPABILITY:
/* BSS requests RA capability or IMSI */
@@ -370,32 +376,36 @@ int gprs_bssgp_rcvmsg(struct msgb *msg, u_int16_t ns_bvci)
case BSSGP_PDUT_RADIO_STATUS:
DEBUGP(DGPRS, "BSSGP RADIO STATUS\n");
/* BSS informs us of some exception */
+ /* FIXME: notify GMM */
break;
case BSSGP_PDUT_SUSPEND:
/* MS wants to suspend */
- rc = bssgp_rx_suspend(msg, ns_bvci);
+ rc = bssgp_rx_suspend(msg);
break;
case BSSGP_PDUT_RESUME:
/* MS wants to resume */
- rc = bssgp_rx_resume(msg, ns_bvci);
+ rc = bssgp_rx_resume(msg);
break;
case BSSGP_PDUT_FLUSH_LL:
/* BSS informs MS has moved to one cell to other cell */
DEBUGP(DGPRS, "BSSGP FLUSH LL\n");
+ /* FIXME: notify GMM */
/* Send FLUSH_LL_ACK */
break;
case BSSGP_PDUT_LLC_DISCARD:
/* BSS informs that some LLC PDU's have been discarded */
DEBUGP(DGPRS, "BSSGP LLC DISCARDED\n");
+ /* FIXME: notify GMM */
break;
case BSSGP_PDUT_FLOW_CONTROL_BVC:
/* BSS informs us of available bandwidth in Gb interface */
- rc = bssgp_rx_fc_bvc(msg, &tp, ns_bvci);
+ rc = bssgp_rx_fc_bvc(msg, &tp);
break;
case BSSGP_PDUT_FLOW_CONTROL_MS:
/* BSS informs us of available bandwidth to one MS */
DEBUGP(DGPRS, "BSSGP FC MS\n");
- /* Send FLOW_CONTROL_MS_ACK */
+ /* FIXME: actually implement flow control */
+ /* FIXME: Send FLOW_CONTROL_MS_ACK */
break;
case BSSGP_PDUT_BVC_BLOCK:
/* BSS tells us that BVC shall be blocked */
@@ -431,6 +441,7 @@ int gprs_bssgp_rcvmsg(struct msgb *msg, u_int16_t ns_bvci)
break;
case BSSGP_PDUT_STATUS:
/* Some exception has occurred */
+ /* FIXME: notify GMM */
case BSSGP_PDUT_DOWNLOAD_BSS_PFC:
case BSSGP_PDUT_CREATE_BSS_PFC_ACK:
case BSSGP_PDUT_CREATE_BSS_PFC_NACK:
@@ -469,8 +480,8 @@ err_mand_ie:
}
/* Entry function from upper level (LLC), asking us to transmit a BSSGP PDU
- * to a remote MS (identified by TLLI) at a BTS identified by its RAC and CID */
-int gprs_bssgp_tx_dl_ud(struct msgb *msg, const struct gprs_ra_id *raid, uint16_t cid)
+ * to a remote MS (identified by TLLI) at a BTS identified by its BVCI and NSEI */
+int gprs_bssgp_tx_dl_ud(struct msgb *msg)
{
struct bssgp_bts_ctx *bctx;
struct bssgp_ud_hdr *budh;
@@ -479,8 +490,19 @@ int gprs_bssgp_tx_dl_ud(struct msgb *msg, const struct gprs_ra_id *raid, uint16_
u_int16_t pdu_lifetime = 1000; /* centi-seconds */
u_int8_t qos_profile_default[3] = { 0x00, 0x00, 0x21 };
u_int16_t msg_len = msg->len;
+ uint16_t bvci = msgb_bvci(msg);
+ uint16_t nsei = msgb_nsei(msg);
- bctx = btsctx_by_raid_cid(raid, cid);
+ /* Identifiers from UP: TLLI, BVCI, NSEI (all in msgb->cb) */
+ if (bvci < 2) {
+ LOGP(DGPRS, LOGL_ERROR, "Cannot send DL-UD to BVCI %u\n",
+ bvci);
+ return -EINVAL;
+ }
+
+ bctx = btsctx_by_bvci_nsei(bvci, nsei);
+ if (!bctx)
+ bctx = btsctx_alloc(bvci, nsei);
if (msg->len > TVLV_MAX_ONEBYTE)
llc_pdu_tlv_hdr_len += 1;
@@ -508,8 +530,7 @@ int gprs_bssgp_tx_dl_ud(struct msgb *msg, const struct gprs_ra_id *raid, uint16_
budh->tlli = htonl(msgb_tlli(msg));
budh->pdu_type = BSSGP_PDUT_DL_UNITDATA;
- msgb_nsei(msg) = bctx->nsei;
- msgb_bvci(msg) = bctx->bvci;
+ /* Identifiers down: BVCI, NSEI (in msgb->cb) */
return gprs_ns_sendmsg(bssgp_nsi, msg);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-07 10:06:18 +0000