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-rw-r--r--openbsc/include/openbsc/gprs_bssgp.h71
-rw-r--r--openbsc/include/openbsc/gprs_ns.h51
-rw-r--r--openbsc/include/openbsc/gprs_ns_frgre.h6
-rw-r--r--openbsc/src/gprs/gprs_bssgp.c702
-rw-r--r--openbsc/src/gprs/gprs_bssgp_util.c3
-rw-r--r--openbsc/src/gprs/gprs_bssgp_vty.c178
-rw-r--r--openbsc/src/gprs/gprs_ns.c165
-rw-r--r--openbsc/src/gprs/gprs_ns_frgre.c305
-rw-r--r--openbsc/src/gprs/gprs_ns_vty.c315
9 files changed, 1559 insertions, 237 deletions
diff --git a/openbsc/include/openbsc/gprs_bssgp.h b/openbsc/include/openbsc/gprs_bssgp.h
index d3ccb12e..e432cf75 100644
--- a/openbsc/include/openbsc/gprs_bssgp.h
+++ b/openbsc/include/openbsc/gprs_bssgp.h
@@ -3,6 +3,10 @@
#include <stdint.h>
+/* Section 5.4.1 */
+#define BVCI_SIGNALLING 0x0000
+#define BVCI_PTM 0x0001
+
/* Section 11.3.26 / Table 11.27 */
enum bssgp_pdu_type {
/* PDUs between RL and BSSGP SAPs */
@@ -149,9 +153,44 @@ int bssgp_tx_status(uint8_t cause, uint16_t *bvci, struct msgb *orig_msg);
/* gprs_bssgp.c */
+#define BVC_S_BLOCKED 0x0001
+
+/* The per-BTS context that we keep on the SGSN side of the BSSGP link */
+struct bssgp_bvc_ctx {
+ struct llist_head list;
+
+ /* parsed RA ID and Cell ID of the remote BTS */
+ struct gprs_ra_id ra_id;
+ uint16_t cell_id;
+
+ /* NSEI and BVCI of underlying Gb link. Together they
+ * uniquely identify a link to a BTS (5.4.4) */
+ uint16_t bvci;
+ uint16_t nsei;
+
+ uint32_t state;
+
+ struct rate_ctr_group *ctrg;
+
+ /* we might want to add this as a shortcut later, avoiding the NSVC
+ * lookup for every packet, similar to a routing cache */
+ //struct gprs_nsvc *nsvc;
+};
+extern struct llist_head bssgp_bvc_ctxts;
+/* Find a BTS Context based on parsed RA ID and Cell ID */
+struct bssgp_bvc_ctx *btsctx_by_raid_cid(const struct gprs_ra_id *raid, uint16_t cid);
+/* Find a BTS context based on BVCI+NSEI tuple */
+struct bssgp_bvc_ctx *btsctx_by_bvci_nsei(uint16_t bvci, uint16_t nsei);
+
#include <osmocore/tlv.h>
-extern int gprs_bssgp_rcvmsg(struct msgb *msg);
+/* BSSGP-UL-UNITDATA.ind */
+int gprs_bssgp_rcvmsg(struct msgb *msg);
+
+/* BSSGP-DL-UNITDATA.req */
+struct sgsn_mm_ctx;
+int gprs_bssgp_tx_dl_ud(struct msgb *msg, struct sgsn_mm_ctx *mmctx);
+
uint16_t bssgp_parse_cell_id(struct gprs_ra_id *raid, const uint8_t *buf);
/* Wrapper around TLV parser to parse BSSGP IEs */
@@ -160,4 +199,34 @@ static inline int bssgp_tlv_parse(struct tlv_parsed *tp, uint8_t *buf, int len)
return tlv_parse(tp, &tvlv_att_def, buf, len, 0, 0);
}
+enum bssgp_paging_mode {
+ BSSGP_PAGING_PS,
+ BSSGP_PAGING_CS,
+};
+
+enum bssgp_paging_scope {
+ BSSGP_PAGING_BSS_AREA, /* all cells in BSS */
+ BSSGP_PAGING_LOCATION_AREA, /* all cells in LA */
+ BSSGP_PAGING_ROUTEING_AREA, /* all cells in RA */
+ BSSGP_PAGING_BVCI, /* one cell */
+};
+
+struct bssgp_paging_info {
+ enum bssgp_paging_mode mode;
+ enum bssgp_paging_scope scope;
+ struct gprs_ra_id raid;
+ uint16_t bvci;
+ const char *imsi;
+ uint32_t *ptmsi;
+ uint16_t drx_params;
+ uint8_t qos[3];
+};
+
+/* Send a single GMM-PAGING.req to a given NSEI/NS-BVCI */
+int gprs_bssgp_tx_paging(uint16_t nsei, uint16_t ns_bvci,
+ struct bssgp_paging_info *pinfo);
+
+/* gprs_bssgp_vty.c */
+int gprs_bssgp_vty_init(void);
+
#endif /* _GPRS_BSSGP_H */
diff --git a/openbsc/include/openbsc/gprs_ns.h b/openbsc/include/openbsc/gprs_ns.h
index 4ccf4c7b..953c364b 100644
--- a/openbsc/include/openbsc/gprs_ns.h
+++ b/openbsc/include/openbsc/gprs_ns.h
@@ -107,6 +107,7 @@ enum ns_timeout {
enum gprs_ns_ll {
GPRS_NS_LL_UDP,
GPRS_NS_LL_E1,
+ GPRS_NS_LL_FR_GRE,
};
enum gprs_ns_evt {
@@ -130,15 +131,18 @@ struct gprs_ns_inst {
uint16_t timeout[NS_TIMERS_COUNT];
- /* which link-layer are we based on? */
- enum gprs_ns_ll ll;
-
- union {
- /* NS-over-IP specific bits */
- struct {
- struct bsc_fd fd;
- } nsip;
- };
+ /* NS-over-IP specific bits */
+ struct {
+ struct bsc_fd fd;
+ uint32_t local_ip;
+ uint16_t local_port;
+ } nsip;
+ /* NS-over-FR-over-GRE-over-IP specific bits */
+ struct {
+ struct bsc_fd fd;
+ uint32_t local_ip;
+ int enabled:1;
+ } frgre;
};
enum nsvc_timer_mode {
@@ -168,10 +172,16 @@ struct gprs_nsvc {
struct rate_ctr_group *ctrg;
+ /* which link-layer are we based on? */
+ enum gprs_ns_ll ll;
+
union {
struct {
struct sockaddr_in bts_addr;
} ip;
+ struct {
+ struct sockaddr_in bts_addr;
+ } frgre;
};
};
@@ -181,15 +191,11 @@ struct gprs_ns_inst *gprs_ns_instantiate(gprs_ns_cb_t *cb);
/* Destroy a NS protocol instance */
void gprs_ns_destroy(struct gprs_ns_inst *nsi);
-/* Listen for incoming GPRS packets */
-int nsip_listen(struct gprs_ns_inst *nsi, uint16_t udp_port);
+/* Listen for incoming GPRS packets via NS/UDP */
+int gprs_ns_nsip_listen(struct gprs_ns_inst *nsi);
struct sockaddr_in;
-/* main entry point, here incoming NS frames enter */
-int gprs_ns_rcvmsg(struct gprs_ns_inst *nsi, struct msgb *msg,
- struct sockaddr_in *saddr);
-
/* main function for higher layers (BSSGP) to send NS messages */
int gprs_ns_sendmsg(struct gprs_ns_inst *nsi, struct msgb *msg);
@@ -197,8 +203,8 @@ int gprs_ns_tx_reset(struct gprs_nsvc *nsvc, uint8_t cause);
int gprs_ns_tx_block(struct gprs_nsvc *nsvc, uint8_t cause);
int gprs_ns_tx_unblock(struct gprs_nsvc *nsvc);
-/* Listen for incoming GPRS packets */
-int nsip_listen(struct gprs_ns_inst *nsi, uint16_t udp_port);
+/* Listen for incoming GPRS packets via NS/FR/GRE */
+int gprs_ns_frgre_listen(struct gprs_ns_inst *nsi);
/* Establish a connection (from the BSS) to the SGSN */
struct gprs_nsvc *nsip_connect(struct gprs_ns_inst *nsi,
@@ -208,8 +214,19 @@ struct gprs_nsvc *nsip_connect(struct gprs_ns_inst *nsi,
struct gprs_nsvc *nsvc_create(struct gprs_ns_inst *nsi, uint16_t nsvci);
void nsvc_delete(struct gprs_nsvc *nsvc);
struct gprs_nsvc *nsvc_by_nsei(struct gprs_ns_inst *nsi, uint16_t nsei);
+struct gprs_nsvc *nsvc_by_nsvci(struct gprs_ns_inst *nsi, uint16_t nsvci);
+
+/* Initiate a RESET procedure (including timer start, ...)*/
+void gprs_nsvc_reset(struct gprs_nsvc *nsvc, uint8_t cause);
/* Add NS-specific VTY stuff */
int gprs_ns_vty_init(struct gprs_ns_inst *nsi);
+#define NS_ALLOC_SIZE 2048
+#define NS_ALLOC_HEADROOM 20
+static inline struct msgb *gprs_ns_msgb_alloc(void)
+{
+ return msgb_alloc_headroom(NS_ALLOC_SIZE, NS_ALLOC_HEADROOM, "GPRS/NS");
+}
+
#endif
diff --git a/openbsc/include/openbsc/gprs_ns_frgre.h b/openbsc/include/openbsc/gprs_ns_frgre.h
new file mode 100644
index 00000000..abcd43ff
--- /dev/null
+++ b/openbsc/include/openbsc/gprs_ns_frgre.h
@@ -0,0 +1,6 @@
+#ifndef _GPRS_NS_FRGRE_H
+#define _GPRS_NS_FRGRE_H
+
+int gprs_ns_frgre_sendmsg(struct gprs_nsvc *nsvc, struct msgb *msg);
+
+#endif
diff --git a/openbsc/src/gprs/gprs_bssgp.c b/openbsc/src/gprs/gprs_bssgp.c
index 9fdfd329..0ec873ca 100644
--- a/openbsc/src/gprs/gprs_bssgp.c
+++ b/openbsc/src/gprs/gprs_bssgp.c
@@ -18,6 +18,9 @@
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
+ * TODO:
+ * o properly count incoming BVC-RESET packets in counter group
+ * o set log context as early as possible for outgoing packets
*/
#include <errno.h>
@@ -28,6 +31,7 @@
#include <osmocore/msgb.h>
#include <osmocore/tlv.h>
#include <osmocore/talloc.h>
+#include <osmocore/rate_ctr.h>
#include <openbsc/debug.h>
#include <openbsc/gsm_data.h>
@@ -35,38 +39,46 @@
#include <openbsc/gprs_bssgp.h>
#include <openbsc/gprs_llc.h>
#include <openbsc/gprs_ns.h>
+#include <openbsc/gprs_sgsn.h>
+#include <openbsc/gprs_gmm.h>
void *bssgp_tall_ctx = NULL;
#define BVC_F_BLOCKED 0x0001
-/* The per-BTS context that we keep on the SGSN side of the BSSGP link */
-struct bssgp_bts_ctx {
- struct llist_head list;
-
- /* parsed RA ID and Cell ID of the remote BTS */
- struct gprs_ra_id ra_id;
- uint16_t cell_id;
-
- /* NSEI and BVCI of underlying Gb link. Together they
- * uniquely identify a link to a BTS (5.4.4) */
- uint16_t bvci;
- uint16_t nsei;
+enum bssgp_ctr {
+ BSSGP_CTR_PKTS_IN,
+ BSSGP_CTR_PKTS_OUT,
+ BSSGP_CTR_BYTES_IN,
+ BSSGP_CTR_BYTES_OUT,
+ BSSGP_CTR_BLOCKED,
+ BSSGP_CTR_DISCARDED,
+};
- uint32_t bvc_state;
+static const struct rate_ctr_desc bssgp_ctr_description[] = {
+ { "packets.in", "Packets at BSSGP Level ( In)" },
+ { "packets.out","Packets at BSSGP Level (Out)" },
+ { "bytes.in", "Bytes at BSSGP Level ( In)" },
+ { "bytes.out", "Bytes at BSSGP Level (Out)" },
+ { "blocked", "BVC Blocking count" },
+ { "discarded", "BVC LLC Discarded count" },
+};
- /* we might want to add this as a shortcut later, avoiding the NSVC
- * lookup for every packet, similar to a routing cache */
- //struct gprs_nsvc *nsvc;
+static const struct rate_ctr_group_desc bssgp_ctrg_desc = {
+ .group_name_prefix = "bssgp.bss_ctx",
+ .group_description = "BSSGP Peer Statistics",
+ .num_ctr = ARRAY_SIZE(bssgp_ctr_description),
+ .ctr_desc = bssgp_ctr_description,
};
-static LLIST_HEAD(bts_ctxts);
+
+LLIST_HEAD(bssgp_bvc_ctxts);
/* Find a BTS Context based on parsed RA ID and Cell ID */
-struct bssgp_bts_ctx *btsctx_by_raid_cid(const struct gprs_ra_id *raid, uint16_t cid)
+struct bssgp_bvc_ctx *btsctx_by_raid_cid(const struct gprs_ra_id *raid, uint16_t cid)
{
- struct bssgp_bts_ctx *bctx;
+ struct bssgp_bvc_ctx *bctx;
- llist_for_each_entry(bctx, &bts_ctxts, list) {
+ llist_for_each_entry(bctx, &bssgp_bvc_ctxts, list) {
if (!memcmp(&bctx->ra_id, raid, sizeof(bctx->ra_id)) &&
bctx->cell_id == cid)
return bctx;
@@ -75,27 +87,30 @@ struct bssgp_bts_ctx *btsctx_by_raid_cid(const struct gprs_ra_id *raid, uint16_t
}
/* Find a BTS context based on BVCI+NSEI tuple */
-struct bssgp_bts_ctx *btsctx_by_bvci_nsei(uint16_t bvci, uint16_t nsei)
+struct bssgp_bvc_ctx *btsctx_by_bvci_nsei(uint16_t bvci, uint16_t nsei)
{
- struct bssgp_bts_ctx *bctx;
+ struct bssgp_bvc_ctx *bctx;
- llist_for_each_entry(bctx, &bts_ctxts, list) {
+ llist_for_each_entry(bctx, &bssgp_bvc_ctxts, list) {
if (bctx->nsei == nsei && bctx->bvci == bvci)
return bctx;
}
return NULL;
}
-struct bssgp_bts_ctx *btsctx_alloc(uint16_t bvci, uint16_t nsei)
+struct bssgp_bvc_ctx *btsctx_alloc(uint16_t bvci, uint16_t nsei)
{
- struct bssgp_bts_ctx *ctx;
+ struct bssgp_bvc_ctx *ctx;
- ctx = talloc_zero(bssgp_tall_ctx, struct bssgp_bts_ctx);
+ ctx = talloc_zero(bssgp_tall_ctx, struct bssgp_bvc_ctx);
if (!ctx)
return NULL;
ctx->bvci = bvci;
ctx->nsei = nsei;
- llist_add(&ctx->list, &bts_ctxts);
+ /* FIXME: BVCI is not unique, only BVCI+NSEI ?!? */
+ ctx->ctrg = rate_ctr_group_alloc(ctx, &bssgp_ctrg_desc, bvci);
+
+ llist_add(&ctx->list, &bssgp_bvc_ctxts);
return ctx;
}
@@ -116,6 +131,96 @@ static int bssgp_tx_fc_bvc_ack(uint16_t nsei, uint8_t tag, uint16_t ns_bvci)
return gprs_ns_sendmsg(bssgp_nsi, msg);
}
+/* 10.3.7 SUSPEND-ACK PDU */
+int bssgp_tx_suspend_ack(uint16_t nsei, uint32_t tlli,
+ const struct gprs_ra_id *ra_id, uint8_t suspend_ref)
+{
+ struct msgb *msg = bssgp_msgb_alloc();
+ struct bssgp_normal_hdr *bgph =
+ (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
+ uint32_t _tlli;
+ uint8_t ra[6];
+
+ msgb_nsei(msg) = nsei;
+ msgb_bvci(msg) = 0; /* Signalling */
+ bgph->pdu_type = BSSGP_PDUT_SUSPEND_ACK;
+
+ _tlli = htonl(tlli);
+ msgb_tvlv_put(msg, BSSGP_IE_TLLI, 4, (uint8_t *) &_tlli);
+ gsm48_construct_ra(ra, ra_id);
+ msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra);
+ msgb_tvlv_put(msg, BSSGP_IE_SUSPEND_REF_NR, 1, &suspend_ref);
+
+ return gprs_ns_sendmsg(bssgp_nsi, msg);
+}
+
+/* 10.3.8 SUSPEND-NACK PDU */
+int bssgp_tx_suspend_nack(uint16_t nsei, uint32_t tlli,
+ uint8_t *cause)
+{
+ struct msgb *msg = bssgp_msgb_alloc();
+ struct bssgp_normal_hdr *bgph =
+ (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
+ uint32_t _tlli;
+
+ msgb_nsei(msg) = nsei;
+ msgb_bvci(msg) = 0; /* Signalling */
+ bgph->pdu_type = BSSGP_PDUT_SUSPEND_NACK;
+
+ _tlli = htonl(tlli);
+ msgb_tvlv_put(msg, BSSGP_IE_TLLI, 4, (uint8_t *) &_tlli);
+ if (cause)
+ msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, cause);
+
+ return gprs_ns_sendmsg(bssgp_nsi, msg);
+}
+
+/* 10.3.10 RESUME-ACK PDU */
+int bssgp_tx_resume_ack(uint16_t nsei, uint32_t tlli,
+ const struct gprs_ra_id *ra_id)
+{
+ struct msgb *msg = bssgp_msgb_alloc();
+ struct bssgp_normal_hdr *bgph =
+ (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
+ uint32_t _tlli;
+ uint8_t ra[6];
+
+ msgb_nsei(msg) = nsei;
+ msgb_bvci(msg) = 0; /* Signalling */
+ bgph->pdu_type = BSSGP_PDUT_RESUME_ACK;
+
+ _tlli = htonl(tlli);
+ msgb_tvlv_put(msg, BSSGP_IE_TLLI, 4, (uint8_t *) &_tlli);
+ gsm48_construct_ra(ra, ra_id);
+ msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra);
+
+ return gprs_ns_sendmsg(bssgp_nsi, msg);
+}
+
+/* 10.3.11 RESUME-NACK PDU */
+int bssgp_tx_resume_nack(uint16_t nsei, uint32_t tlli,
+ const struct gprs_ra_id *ra_id, uint8_t *cause)
+{
+ struct msgb *msg = bssgp_msgb_alloc();
+ struct bssgp_normal_hdr *bgph =
+ (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
+ uint32_t _tlli;
+ uint8_t ra[6];
+
+ msgb_nsei(msg) = nsei;
+ msgb_bvci(msg) = 0; /* Signalling */
+ bgph->pdu_type = BSSGP_PDUT_SUSPEND_NACK;
+
+ _tlli = htonl(tlli);
+ msgb_tvlv_put(msg, BSSGP_IE_TLLI, 4, (uint8_t *) &_tlli);
+ gsm48_construct_ra(ra, ra_id);
+ msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra);
+ if (cause)
+ msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, cause);
+
+ return gprs_ns_sendmsg(bssgp_nsi, msg);
+}
+
uint16_t bssgp_parse_cell_id(struct gprs_ra_id *raid, const uint8_t *buf)
{
/* 6 octets RAC */
@@ -128,13 +233,13 @@ uint16_t bssgp_parse_cell_id(struct gprs_ra_id *raid, const uint8_t *buf)
static int bssgp_rx_bvc_reset(struct msgb *msg, struct tlv_parsed *tp,
uint16_t ns_bvci)
{
- struct bssgp_bts_ctx *bctx;
+ struct bssgp_bvc_ctx *bctx;
uint16_t nsei = msgb_nsei(msg);
uint16_t bvci;
int rc;
bvci = ntohs(*(uint16_t *)TLVP_VAL(tp, BSSGP_IE_BVCI));
- DEBUGPC(DBSSGP, "BVCI=%u, cause=%s\n", bvci,
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx RESET cause=%s\n", bvci,
bssgp_cause_str(*TLVP_VAL(tp, BSSGP_IE_CAUSE)));
/* look-up or create the BTS context for this BVC */
@@ -142,11 +247,14 @@ static int bssgp_rx_bvc_reset(struct msgb *msg, struct tlv_parsed *tp,
if (!bctx)
bctx = btsctx_alloc(bvci, nsei);
+ /* As opposed to NS-VCs, BVCs are NOT blocked after RESET */
+ bctx->state &= ~BVC_S_BLOCKED;
+
/* When we receive a BVC-RESET PDU (at least of a PTP BVCI), the BSS
* informs us about its RAC + Cell ID, so we can create a mapping */
if (bvci != 0 && bvci != 1) {
if (!TLVP_PRESENT(tp, BSSGP_IE_CELL_ID)) {
- LOGP(DBSSGP, LOGL_ERROR, "BSSGP RESET BVCI=%u "
+ LOGP(DBSSGP, LOGL_ERROR, "BSSGP BVCI=%u RESET "
"missing mandatory IE\n", bvci);
return -EINVAL;
}
@@ -164,90 +272,200 @@ static int bssgp_rx_bvc_reset(struct msgb *msg, struct tlv_parsed *tp,
return 0;
}
+static int bssgp_rx_bvc_block(struct msgb *msg, struct tlv_parsed *tp)
+{
+ uint16_t bvci;
+ struct bssgp_bvc_ctx *ptp_ctx;
+
+ bvci = ntohs(*(uint16_t *)TLVP_VAL(tp, BSSGP_IE_BVCI));
+ if (bvci == BVCI_SIGNALLING) {
+ /* 8.3.2: Signalling BVC shall never be blocked */
+ LOGP(DBSSGP, LOGL_ERROR, "NSEI=%u/BVCI=%u "
+ "received block for signalling BVC!?!\n",
+ msgb_nsei(msg), msgb_bvci(msg));
+ return 0;
+ }
+
+ LOGP(DBSSGP, LOGL_INFO, "BSSGP BVCI=%u BVC-BLOCK\n", bvci);
+
+ ptp_ctx = btsctx_by_bvci_nsei(bvci, msgb_nsei(msg));
+ if (!ptp_ctx)
+ return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, &bvci, msg);
+
+ ptp_ctx->state |= BVC_S_BLOCKED;
+ rate_ctr_inc(&ptp_ctx->ctrg->ctr[BSSGP_CTR_BLOCKED]);
+
+ /* FIXME: Send NM_BVC_BLOCK.ind to NM */
+
+ /* We always acknowledge the BLOCKing */
+ return bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK_ACK, msgb_nsei(msg),
+ bvci, msgb_bvci(msg));
+};
+
+static int bssgp_rx_bvc_unblock(struct msgb *msg, struct tlv_parsed *tp)
+{
+ uint16_t bvci;
+ struct bssgp_bvc_ctx *ptp_ctx;
+
+ bvci = ntohs(*(uint16_t *)TLVP_VAL(tp, BSSGP_IE_BVCI));
+ if (bvci == BVCI_SIGNALLING) {
+ /* 8.3.2: Signalling BVC shall never be blocked */
+ LOGP(DBSSGP, LOGL_ERROR, "NSEI=%u/BVCI=%u "
+ "received unblock for signalling BVC!?!\n",
+ msgb_nsei(msg), msgb_bvci(msg));
+ return 0;
+ }
+
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx BVC-UNBLOCK\n", bvci);
+
+ ptp_ctx = btsctx_by_bvci_nsei(bvci, msgb_nsei(msg));
+ if (!ptp_ctx)
+ return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, &bvci, msg);
+
+ ptp_ctx->state &= ~BVC_S_BLOCKED;
+
+ /* FIXME: Send NM_BVC_UNBLOCK.ind to NM */
+
+ /* We always acknowledge the unBLOCKing */
+ return bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_UNBLOCK_ACK, msgb_nsei(msg),
+ bvci, msgb_bvci(msg));
+};
+
/* Uplink unit-data */
-static int bssgp_rx_ul_ud(struct msgb *msg)
+static int bssgp_rx_ul_ud(struct msgb *msg, struct tlv_parsed *tp,
+ struct bssgp_bvc_ctx *ctx)
{
struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg);
- int data_len = msgb_bssgp_len(msg) - sizeof(*budh);
- struct tlv_parsed tp;
- int rc;
-
- DEBUGP(DBSSGP, "BSSGP UL-UD\n");
/* extract TLLI and parse TLV IEs */
msgb_tlli(msg) = ntohl(budh->tlli);
- rc = bssgp_tlv_parse(&tp, budh->data, data_len);
- /* Cell ID and LLC_PDU are the only mandatory IE */
- if (!TLVP_PRESENT(&tp, BSSGP_IE_CELL_ID) ||
- !TLVP_PRESENT(&tp, BSSGP_IE_LLC_PDU))
- return -EIO;
+ DEBUGP(DBSSGP, "BSSGP TLLI=0x%08x UPLINK-UNITDATA\n", msgb_tlli(msg));
- /* FIXME: lookup bssgp_bts_ctx based on BVCI + NSEI */
+ /* Cell ID and LLC_PDU are the only mandatory IE */
+ if (!TLVP_PRESENT(tp, BSSGP_IE_CELL_ID) ||
+ !TLVP_PRESENT(tp, BSSGP_IE_LLC_PDU)) {
+ LOGP(DBSSGP, LOGL_ERROR, "BSSGP TLLI=0x%08x Rx UL-UD "
+ "missing mandatory IE\n", msgb_tlli(msg));
+ return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
+ }
/* store pointer to LLC header and CELL ID in msgb->cb */
- msgb_llch(msg) = TLVP_VAL(&tp, BSSGP_IE_LLC_PDU);
- msgb_bcid(msg) = TLVP_VAL(&tp, BSSGP_IE_CELL_ID);
+ msgb_llch(msg) = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_LLC_PDU);
+ msgb_bcid(msg) = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_CELL_ID);
- return gprs_llc_rcvmsg(msg, &tp);
+ return gprs_llc_rcvmsg(msg, tp);
}
-static int bssgp_rx_suspend(struct msgb *msg)
+static int bssgp_rx_suspend(struct msgb *msg, struct tlv_parsed *tp,
+ struct bssgp_bvc_ctx *ctx)
{
struct bssgp_normal_hdr *bgph =
(struct bssgp_normal_hdr *) msgb_bssgph(msg);
- int data_len = msgb_bssgp_len(msg) - sizeof(*bgph);
- struct tlv_parsed tp;
+ struct gprs_ra_id raid;
+ uint32_t tlli;
int rc;
- DEBUGP(DBSSGP, "BSSGP SUSPEND\n");
+ if (!TLVP_PRESENT(tp, BSSGP_IE_TLLI) ||
+ !TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA)) {
+ LOGP(DBSSGP, LOGL_ERROR, "BSSGP BVCI=%u Rx SUSPEND "
+ "missing mandatory IE\n", ctx->bvci);
+ return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
+ }
+
+ tlli = ntohl(*(uint32_t *)TLVP_VAL(tp, BSSGP_IE_TLLI));
- rc = bssgp_tlv_parse(&tp, bgph->data, data_len);
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u TLLI=0x%08x Rx SUSPEND\n",
+ ctx->bvci, tlli);
+
+ gsm48_parse_ra(&raid, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA));
+
+ /* Inform GMM about the SUSPEND request */
+ rc = gprs_gmm_rx_suspend(&raid, tlli);
if (rc < 0)
- return rc;
+ return bssgp_tx_suspend_nack(msgb_nsei(msg), tlli, NULL);
- if (!TLVP_PRESENT(&tp, BSSGP_IE_TLLI) ||
- !TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA))
- return -EIO;
+ bssgp_tx_suspend_ack(msgb_nsei(msg), tlli, &raid, 0);
- /* FIXME: pass the SUSPEND request to GMM */
- /* SEND SUSPEND_ACK or SUSPEND_NACK */
+ return 0;
}
-static int bssgp_rx_resume(struct msgb *msg)
+static int bssgp_rx_resume(struct msgb *msg, struct tlv_parsed *tp,
+ struct bssgp_bvc_ctx *ctx)
{
struct bssgp_normal_hdr *bgph =
(struct bssgp_normal_hdr *) msgb_bssgph(msg);
- int data_len = msgb_bssgp_len(msg) - sizeof(*bgph);
- struct tlv_parsed tp;
+ struct gprs_ra_id raid;
+ uint32_t tlli;
+ uint8_t suspend_ref;
int rc;
- DEBUGP(DBSSGP, "BSSGP RESUME\n");
+ if (!TLVP_PRESENT(tp, BSSGP_IE_TLLI) ||
+ !TLVP_PRESENT(tp, BSSGP_IE_ROUTEING_AREA) ||
+ !TLVP_PRESENT(tp, BSSGP_IE_SUSPEND_REF_NR)) {
+ LOGP(DBSSGP, LOGL_ERROR, "BSSGP BVCI=%u Rx RESUME "
+ "missing mandatory IE\n", ctx->bvci);
+ return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
+ }
+
+ tlli = ntohl(*(uint32_t *)TLVP_VAL(tp, BSSGP_IE_TLLI));
+ suspend_ref = *TLVP_VAL(tp, BSSGP_IE_SUSPEND_REF_NR);
- rc = bssgp_tlv_parse(&tp, bgph->data, data_len);
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u TLLI=0x%08x RESUME\n", ctx->bvci, tlli);
+
+ gsm48_parse_ra(&raid, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA));
+
+ /* Inform GMM about the RESUME request */
+ rc = gprs_gmm_rx_resume(&raid, tlli, suspend_ref);
if (rc < 0)
- return rc;
+ return bssgp_tx_resume_nack(msgb_nsei(msg), tlli, &raid,
+ NULL);
+
+ bssgp_tx_resume_ack(msgb_nsei(msg), tlli, &raid);
+ return 0;
+}
+
- if (!TLVP_PRESENT(&tp, BSSGP_IE_TLLI) ||
- !TLVP_PRESENT(&tp, BSSGP_IE_ROUTEING_AREA) ||
- !TLVP_PRESENT(&tp, BSSGP_IE_SUSPEND_REF_NR))
- return -EIO;
+static int bssgp_rx_llc_disc(struct msgb *msg, struct tlv_parsed *tp,
+ struct bssgp_bvc_ctx *ctx)
+{
+ uint32_t tlli;
+
+ if (!TLVP_PRESENT(tp, BSSGP_IE_TLLI) ||
+ !TLVP_PRESENT(tp, BSSGP_IE_LLC_FRAMES_DISCARDED) ||
+ !TLVP_PRESENT(tp, BSSGP_IE_BVCI) ||
+ !TLVP_PRESENT(tp, BSSGP_IE_NUM_OCT_AFF)) {
+ LOGP(DBSSGP, LOGL_ERROR, "BSSGP BVCI=%u Rx LLC DISCARDED "
+ "missing mandatory IE\n", ctx->bvci);
+ }
- /* FIXME: pass the RESUME request to GMM */
- /* SEND RESUME_ACK or RESUME_NACK */
+ tlli = ntohl(*(uint32_t *)TLVP_VAL(tp, BSSGP_IE_TLLI));
+
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u TLLI=%u LLC DISCARDED\n",
+ ctx->bvci, tlli);
+
+ rate_ctr_inc(&ctx->ctrg->ctr[BSSGP_CTR_DISCARDED]);
+
+ /* FIXME: send NM_LLC_DISCARDED to NM */
+ return 0;
}
-static int bssgp_rx_fc_bvc(struct msgb *msg, struct tlv_parsed *tp)
+static int bssgp_rx_fc_bvc(struct msgb *msg, struct tlv_parsed *tp,
+ struct bssgp_bvc_ctx *bctx)
{
- DEBUGP(DBSSGP, "BSSGP FC BVC\n");
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx Flow Control BVC\n",
+ bctx->bvci);
if (!TLVP_PRESENT(tp, BSSGP_IE_TAG) ||
!TLVP_PRESENT(tp, BSSGP_IE_BVC_BUCKET_SIZE) ||
!TLVP_PRESENT(tp, BSSGP_IE_BUCKET_LEAK_RATE) ||
!TLVP_PRESENT(tp, BSSGP_IE_BMAX_DEFAULT_MS) ||
- !TLVP_PRESENT(tp, BSSGP_IE_R_DEFAULT_MS))
+ !TLVP_PRESENT(tp, BSSGP_IE_R_DEFAULT_MS)) {
+ LOGP(DBSSGP, LOGL_ERROR, "BSSGP BVCI=%u Rx FC BVC "
+ "missing mandatory IE\n", bctx->bvci);
return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
+ }
/* FIXME: actually implement flow control */
@@ -256,133 +474,168 @@ static int bssgp_rx_fc_bvc(struct msgb *msg, struct tlv_parsed *tp)
msgb_bvci(msg));
}
-/* We expect msgb_bssgph() to point to the BSSGP header */
-int gprs_bssgp_rcvmsg(struct msgb *msg)
+/* Receive a BSSGP PDU from a BSS on a PTP BVCI */
+static int gprs_bssgp_rx_ptp(struct msgb *msg, struct tlv_parsed *tp,
+ struct bssgp_bvc_ctx *bctx)
{
struct bssgp_normal_hdr *bgph =
(struct bssgp_normal_hdr *) msgb_bssgph(msg);
- struct tlv_parsed tp;
uint8_t pdu_type = bgph->pdu_type;
- int data_len = msgb_bssgp_len(msg) - sizeof(*bgph);
- 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)
- rc = bssgp_tlv_parse(&tp, bgph->data, data_len);
+ /* If traffic is received on a BVC that is marked as blocked, the
+ * received PDU shall not be accepted and a STATUS PDU (Cause value:
+ * BVC Blocked) shall be sent to the peer entity on the signalling BVC */
+ if (bctx->state & BVC_S_BLOCKED && pdu_type != BSSGP_PDUT_STATUS) {
+ uint16_t bvci = msgb_bvci(msg);
+ return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &bvci, msg);
+ }
switch (pdu_type) {
case BSSGP_PDUT_UL_UNITDATA:
/* some LLC data from the MS */
- rc = bssgp_rx_ul_ud(msg);
+ rc = bssgp_rx_ul_ud(msg, tp, bctx);
break;
case BSSGP_PDUT_RA_CAPABILITY:
/* BSS requests RA capability or IMSI */
- DEBUGP(DBSSGP, "BSSGP RA CAPABILITY UPDATE\n");
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx RA CAPABILITY UPDATE\n",
+ bctx->bvci);
+ /* FIXME: send GMM_RA_CAPABILITY_UPDATE.ind to GMM */
/* FIXME: send RA_CAPA_UPDATE_ACK */
break;
case BSSGP_PDUT_RADIO_STATUS:
- DEBUGP(DBSSGP, "BSSGP RADIO STATUS\n");
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx RADIO STATUS\n", bctx->bvci);
/* BSS informs us of some exception */
- /* FIXME: notify GMM */
+ /* FIXME: send GMM_RADIO_STATUS.ind to GMM */
+ break;
+ case BSSGP_PDUT_FLOW_CONTROL_BVC:
+ /* BSS informs us of available bandwidth in Gb interface */
+ rc = bssgp_rx_fc_bvc(msg, tp, bctx);
+ break;
+ case BSSGP_PDUT_FLOW_CONTROL_MS:
+ /* BSS informs us of available bandwidth to one MS */
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx Flow Control MS\n",
+ bctx->bvci);
+ /* FIXME: actually implement flow control */
+ /* FIXME: Send FLOW_CONTROL_MS_ACK */
+ break;
+ case BSSGP_PDUT_STATUS:
+ /* Some exception has occurred */
+ /* FIXME: send NM_STATUS.ind to NM */
+ case BSSGP_PDUT_DOWNLOAD_BSS_PFC:
+ case BSSGP_PDUT_CREATE_BSS_PFC_ACK:
+ case BSSGP_PDUT_CREATE_BSS_PFC_NACK:
+ case BSSGP_PDUT_MODIFY_BSS_PFC:
+ case BSSGP_PDUT_DELETE_BSS_PFC_ACK:
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx PDU type 0x%02x not [yet] "
+ "implemented\n", bctx->bvci, pdu_type);
+ rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg);
+ break;
+ /* those only exist in the SGSN -> BSS direction */
+ case BSSGP_PDUT_DL_UNITDATA:
+ case BSSGP_PDUT_PAGING_PS:
+ case BSSGP_PDUT_PAGING_CS:
+ case BSSGP_PDUT_RA_CAPA_UPDATE_ACK:
+ case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK:
+ case BSSGP_PDUT_FLOW_CONTROL_MS_ACK:
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u PDU type 0x%02x only exists "
+ "in DL\n", bctx->bvci, pdu_type);
+ bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
+ rc = -EINVAL;
break;
+ default:
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u PDU type 0x%02x unknown\n",
+ bctx->bvci, pdu_type);
+ rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
+ break;
+ }
+
+ return rc;
+}
+
+/* Receive a BSSGP PDU from a BSS on a SIGNALLING BVCI */
+static int gprs_bssgp_rx_sign(struct msgb *msg, struct tlv_parsed *tp,
+ struct bssgp_bvc_ctx *bctx)
+{
+ struct bssgp_normal_hdr *bgph =
+ (struct bssgp_normal_hdr *) msgb_bssgph(msg);
+ uint8_t pdu_type = bgph->pdu_type;
+ int rc = 0;
+ uint16_t ns_bvci = msgb_bvci(msg);
+ uint16_t bvci;
+
+ switch (bgph->pdu_type) {
case BSSGP_PDUT_SUSPEND:
/* MS wants to suspend */
- rc = bssgp_rx_suspend(msg);
+ rc = bssgp_rx_suspend(msg, tp, bctx);
break;
case BSSGP_PDUT_RESUME:
/* MS wants to resume */
- rc = bssgp_rx_resume(msg);
+ rc = bssgp_rx_resume(msg, tp, bctx);
break;
- case BSSGP_PDUT_FLUSH_LL:
- /* BSS informs MS has moved to one cell to other cell */
- DEBUGP(DBSSGP, "BSSGP FLUSH LL\n");
- /* FIXME: notify GMM */
- /* Send FLUSH_LL_ACK */
+ case BSSGP_PDUT_FLUSH_LL_ACK:
+ /* BSS informs us it has performed LL FLUSH */
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx FLUSH LL ACK\n", bctx->bvci);
+ /* FIXME: send NM_FLUSH_LL.res to NM */
break;
case BSSGP_PDUT_LLC_DISCARD:
/* BSS informs that some LLC PDU's have been discarded */
- DEBUGP(DBSSGP, "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);
- break;
- case BSSGP_PDUT_FLOW_CONTROL_MS:
- /* BSS informs us of available bandwidth to one MS */
- DEBUGP(DBSSGP, "BSSGP FC MS\n");
- /* FIXME: actually implement flow control */
- /* FIXME: Send FLOW_CONTROL_MS_ACK */
+ rc = bssgp_rx_llc_disc(msg, tp, bctx);
break;
case BSSGP_PDUT_BVC_BLOCK:
/* BSS tells us that BVC shall be blocked */
- DEBUGP(DBSSGP, "BSSGP BVC BLOCK ");
- if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI) ||
- !TLVP_PRESENT(&tp, BSSGP_IE_CAUSE))
+ if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI) ||
+ !TLVP_PRESENT(tp, BSSGP_IE_CAUSE)) {
+ LOGP(DBSSGP, LOGL_ERROR, "BSSGP Rx BVC-BLOCK "
+ "missing mandatory IE\n");
goto err_mand_ie;
- bvci = ntohs(*(uint16_t *)TLVP_VAL(&tp, BSSGP_IE_BVCI));
- DEBUGPC(DBSSGP, "BVCI=%u, cause=%s\n", bvci,
- bssgp_cause_str(*TLVP_VAL(&tp, BSSGP_IE_CAUSE)));
- /* We always acknowledge the BLOCKing */
- rc = bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK_ACK,
- msgb_nsei(msg), bvci, ns_bvci);
+ }
+ rc = bssgp_rx_bvc_block(msg, tp);
break;
case BSSGP_PDUT_BVC_UNBLOCK:
/* BSS tells us that BVC shall be unblocked */
- DEBUGP(DBSSGP, "BSSGP BVC UNBLOCK ");
- if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI))
+ if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI)) {
+ LOGP(DBSSGP, LOGL_ERROR, "BSSGP Rx BVC-UNBLOCK "
+ "missing mandatory IE\n");
goto err_mand_ie;
- bvci = ntohs(*(uint16_t *)TLVP_VAL(&tp, BSSGP_IE_BVCI));
- DEBUGPC(DBSSGP, "BVCI=%u\n", bvci);
- /* We always acknowledge the unBLOCKing */
- rc = bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_UNBLOCK_ACK,
- msgb_nsei(msg), bvci, ns_bvci);
+ }
+ rc = bssgp_rx_bvc_unblock(msg, tp);
break;
case BSSGP_PDUT_BVC_RESET:
/* BSS tells us that BVC init is required */
- DEBUGP(DBSSGP, "BSSGP BVC RESET ");
- if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI) ||
- !TLVP_PRESENT(&tp, BSSGP_IE_CAUSE))
+ if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI) ||
+ !TLVP_PRESENT(tp, BSSGP_IE_CAUSE)) {
+ LOGP(DBSSGP, LOGL_ERROR, "BSSGP Rx BVC-RESET "
+ "missing mandatory IE\n");
goto err_mand_ie;
- rc = bssgp_rx_bvc_reset(msg, &tp, ns_bvci);
+ }
+ rc = bssgp_rx_bvc_reset(msg, tp, 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:
- case BSSGP_PDUT_MODIFY_BSS_PFC:
- case BSSGP_PDUT_DELETE_BSS_PFC_ACK:
- DEBUGP(DBSSGP, "BSSGP PDU type 0x%02x not [yet] implemented\n",
- pdu_type);
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx BVC STATUS\n", bctx->bvci);
+ /* FIXME: send NM_STATUS.ind to NM */
break;
/* those only exist in the SGSN -> BSS direction */
- case BSSGP_PDUT_DL_UNITDATA:
case BSSGP_PDUT_PAGING_PS:
case BSSGP_PDUT_PAGING_CS:
- case BSSGP_PDUT_RA_CAPA_UPDATE_ACK:
case BSSGP_PDUT_SUSPEND_ACK:
case BSSGP_PDUT_SUSPEND_NACK:
case BSSGP_PDUT_RESUME_ACK:
case BSSGP_PDUT_RESUME_NACK:
- case BSSGP_PDUT_FLUSH_LL_ACK:
- case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK:
- case BSSGP_PDUT_FLOW_CONTROL_MS_ACK:
+ case BSSGP_PDUT_FLUSH_LL:
case BSSGP_PDUT_BVC_BLOCK_ACK:
case BSSGP_PDUT_BVC_UNBLOCK_ACK:
case BSSGP_PDUT_SGSN_INVOKE_TRACE:
- DEBUGP(DBSSGP, "BSSGP PDU type 0x%02x only exists in DL\n",
- pdu_type);
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx PDU type 0x%02x only exists "
+ "in DL\n", bctx->bvci, pdu_type);
+ bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
rc = -EINVAL;
break;
default:
- DEBUGP(DBSSGP, "BSSGP PDU type 0x%02x unknown\n", pdu_type);
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx PDU type 0x%02x unknown\n",
+ bctx->bvci, pdu_type);
+ rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
break;
}
@@ -391,30 +644,85 @@ err_mand_ie:
return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
}
+/* We expect msgb_bssgph() to point to the BSSGP header */
+int gprs_bssgp_rcvmsg(struct msgb *msg)
+{
+ struct bssgp_normal_hdr *bgph =
+ (struct bssgp_normal_hdr *) msgb_bssgph(msg);
+ struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg);
+ struct tlv_parsed tp;
+ struct bssgp_bvc_ctx *bctx;
+ uint8_t pdu_type = bgph->pdu_type;
+ uint16_t ns_bvci = msgb_bvci(msg);
+ int data_len;
+ 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) {
+ data_len = msgb_bssgp_len(msg) - sizeof(*bgph);
+ rc = bssgp_tlv_parse(&tp, bgph->data, data_len);
+ } else {
+ data_len = msgb_bssgp_len(msg) - sizeof(*budh);
+ rc = bssgp_tlv_parse(&tp, budh->data, data_len);
+ }
+
+ /* look-up or create the BTS context for this BVC */
+ bctx = btsctx_by_bvci_nsei(ns_bvci, msgb_nsei(msg));
+ /* Only a RESET PDU can create a new BVC context */
+ if (!bctx && pdu_type != BSSGP_PDUT_BVC_RESET) {
+ LOGP(DBSSGP, LOGL_NOTICE, "NSEI=%u/BVCI=%u Rejecting PDU "
+ "type %u for unknown BVCI\n", msgb_nsei(msg), ns_bvci,
+ pdu_type);
+ return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg);
+ }
+
+ if (bctx) {
+ log_set_context(BSC_CTX_BVC, bctx);
+ rate_ctr_inc(&bctx->ctrg->ctr[BSSGP_CTR_PKTS_IN]);
+ rate_ctr_add(&bctx->ctrg->ctr[BSSGP_CTR_BYTES_IN],
+ msgb_bssgp_len(msg));
+ }
+
+ if (ns_bvci == BVCI_SIGNALLING)
+ rc = gprs_bssgp_rx_sign(msg, &tp, bctx);
+ else if (ns_bvci == BVCI_PTM)
+ rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg);
+ else
+ rc = gprs_bssgp_rx_ptp(msg, &tp, bctx);
+
+ return rc;
+}
+
/* 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 BVCI and NSEI */
-int gprs_bssgp_tx_dl_ud(struct msgb *msg)
+int gprs_bssgp_tx_dl_ud(struct msgb *msg, struct sgsn_mm_ctx *mmctx)
{
- struct bssgp_bts_ctx *bctx;
+ struct bssgp_bvc_ctx *bctx;
struct bssgp_ud_hdr *budh;