[gprs] gb_proxy: Send proper BSSGP STATUS msg in error case
In order to reuse the existing bssgp_tx_* functions without pulling
in the dependencies of gprs_bssgp.c, we have to move those functions
to gprs_bssgp_util.c
Furthermore, we can remove gbprox_nsi and replace it with bssgp_nsi,
and we can do proper processing of BVC-RESET messages coming from
the SGSN on the signalling BVC. In that case we need to send RESET
messages to all the BSS.
diff --git a/openbsc/include/openbsc/gprs_bssgp.h b/openbsc/include/openbsc/gprs_bssgp.h
index c1094b3..d3ccb12 100644
--- a/openbsc/include/openbsc/gprs_bssgp.h
+++ b/openbsc/include/openbsc/gprs_bssgp.h
@@ -137,6 +137,18 @@
/* Our implementation */
+/* gprs_bssgp_util.c */
+extern struct gprs_ns_inst *bssgp_nsi;
+struct msgb *bssgp_msgb_alloc(void);
+const char *bssgp_cause_str(enum gprs_bssgp_cause cause);
+/* Transmit a simple response such as BLOCK/UNBLOCK/RESET ACK/NACK */
+int bssgp_tx_simple_bvci(uint8_t pdu_type, uint16_t nsei,
+ uint16_t bvci, uint16_t ns_bvci);
+/* Chapter 10.4.14: Status */
+int bssgp_tx_status(uint8_t cause, uint16_t *bvci, struct msgb *orig_msg);
+
+/* gprs_bssgp.c */
+
#include <osmocore/tlv.h>
extern int gprs_bssgp_rcvmsg(struct msgb *msg);
diff --git a/openbsc/src/gprs/Makefile.am b/openbsc/src/gprs/Makefile.am
index 2b42923..7cb7ba6 100644
--- a/openbsc/src/gprs/Makefile.am
+++ b/openbsc/src/gprs/Makefile.am
@@ -6,10 +6,11 @@
noinst_LIBRARIES = libsgsn.a
libsgsn_a_SOURCES = gprs_ns.c gprs_bssgp.c gprs_llc.c gsm_04_08_gprs.c \
- crc24.c gprs_sgsn.c
+ crc24.c gprs_sgsn.c gprs_bssgp_util.c
osmo_gbproxy_SOURCES = gb_proxy.c gb_proxy_main.c gb_proxy_vty.c \
- gprs_ns.c $(top_srcdir)/src/socket.c $(top_srcdir)/src/debug.c
+ gprs_ns.c gprs_bssgp_util.c \
+ $(top_srcdir)/src/socket.c $(top_srcdir)/src/debug.c
osmo_gbproxy_LDADD = $(top_builddir)/src/libvty.a
osmo_sgsn_SOURCES = sgsn_main.c sgsn_vty.c \
diff --git a/openbsc/src/gprs/gb_proxy.c b/openbsc/src/gprs/gb_proxy.c
index 3c63943..ff80e92 100644
--- a/openbsc/src/gprs/gb_proxy.c
+++ b/openbsc/src/gprs/gb_proxy.c
@@ -55,8 +55,6 @@
/* Linked list of all Gb peers (except SGSN) */
static LLIST_HEAD(gbprox_bts_peers);
-extern struct gprs_ns_inst *gbprox_nsi;
-
/* Find the gbprox_peer by its BVCI */
static struct gbprox_peer *peer_by_bvci(uint16_t bvci)
{
@@ -127,30 +125,6 @@
msgb_pull(msg, strip_len);
}
-/* FIXME: this is copy+paste from gprs_bssgp.c */
-static inline struct msgb *bssgp_msgb_alloc(void)
-{
- return msgb_alloc_headroom(4096, 128, "BSSGP");
-}
-static int bssgp_tx_simple_bvci(uint8_t pdu_type, uint16_t nsei,
- uint16_t bvci, uint16_t ns_bvci)
-{
- struct msgb *msg = bssgp_msgb_alloc();
- struct bssgp_normal_hdr *bgph =
- (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
- uint16_t _bvci;
-
- msgb_nsei(msg) = nsei;
- msgb_bvci(msg) = ns_bvci;
-
- bgph->pdu_type = pdu_type;
- _bvci = htons(bvci);
- msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
-
- return gprs_ns_sendmsg(gbprox_nsi, msg);
-}
-
-
/* feed a message down the NS-VC associated with the specified peer */
static int gbprox_relay2sgsn(struct msgb *msg, uint16_t ns_bvci)
{
@@ -162,7 +136,7 @@
strip_ns_hdr(msg);
- return gprs_ns_sendmsg(gbprox_nsi, msg);
+ return gprs_ns_sendmsg(bssgp_nsi, msg);
}
/* feed a message down the NS-VC associated with the specified peer */
@@ -177,7 +151,7 @@
strip_ns_hdr(msg);
- return gprs_ns_sendmsg(gbprox_nsi, msg);
+ return gprs_ns_sendmsg(bssgp_nsi, msg);
}
/* Send a message to a peer identified by ptp_bvci but using ns_bvci
@@ -274,9 +248,13 @@
/* Normally, we can simply pass on all signalling messages from BSS to SGSN */
return gbprox_relay2sgsn(msg, ns_bvci);
err_no_peer:
+ LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(BSS) cannot find peer based on RAC\n",
+ nsvc->nsei);
+ return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg);
err_mand_ie:
- /* FIXME: do something */
- ;
+ LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(BSS) missing mandatory RA IE\n",
+ nsvc->nsei);
+ return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
}
/* Receive paging request from SGSN, we need to relay to proper BSS */
@@ -298,6 +276,42 @@
return -EINVAL;
}
+/* Receive an incoming BVC-RESET message from the SGSN */
+static int rx_reset_from_sgsn(struct msgb *msg, struct tlv_parsed *tp,
+ struct gprs_nsvc *nsvc, uint16_t ns_bvci)
+{
+ struct gbprox_peer *peer;
+ uint16_t ptp_bvci;
+
+ if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI)) {
+ return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE,
+ NULL, msg);
+ }
+ ptp_bvci = ntohs(*(uint16_t *)TLVP_VAL(tp, BSSGP_IE_BVCI));
+
+ if (ptp_bvci >= 2) {
+ /* A reset for a PTP BVC was received, forward it to its
+ * respective peer */
+ peer = peer_by_bvci(ptp_bvci);
+ if (!peer) {
+ LOGP(DGPRS, LOGL_ERROR, "Cannot find BSS for BVCI %u\n",
+ ptp_bvci);
+ return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI,
+ NULL, msg);
+ }
+ return gbprox_relay2peer(msg, peer, ns_bvci);
+ }
+
+ /* A reset for the Signalling entity has been received
+ * from the SGSN. As the signalling BVCI is shared
+ * among all the BSS's that we multiplex, it needs to
+ * be relayed */
+ llist_for_each_entry(peer, &gbprox_bts_peers, list)
+ gbprox_relay2peer(msg, peer, ns_bvci);
+
+ return 0;
+}
+
/* Receive an incoming signalling message from the SGSN-side NS-VC */
static int gbprox_rx_sig_from_sgsn(struct msgb *msg, struct gprs_nsvc *nsvc,
uint16_t ns_bvci)
@@ -313,6 +327,7 @@
if (ns_bvci != 0) {
LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) BVCI %u is not "
"signalling\n", nsvc->nsei, ns_bvci);
+ /* FIXME: Send proper error message */
return -EINVAL;
}
@@ -322,16 +337,18 @@
pdu_type == BSSGP_PDUT_DL_UNITDATA) {
LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) UNITDATA not allowed in "
"signalling\n", nsvc->nsei);
- return -EINVAL;
+ return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
}
rc = bssgp_tlv_parse(&tp, bgph->data, data_len);
switch (pdu_type) {
+ case BSSGP_PDUT_BVC_RESET:
+ rc = rx_reset_from_sgsn(msg, &tp, nsvc, ns_bvci);
+ break;
case BSSGP_PDUT_FLUSH_LL:
case BSSGP_PDUT_BVC_BLOCK_ACK:
case BSSGP_PDUT_BVC_UNBLOCK_ACK:
- case BSSGP_PDUT_BVC_RESET:
case BSSGP_PDUT_BVC_RESET_ACK:
/* simple case: BVCI IE is mandatory */
if (!TLVP_PRESENT(&tp, BSSGP_IE_BVCI))
@@ -345,9 +362,22 @@
rc = gbprox_rx_paging(msg, &tp, nsvc, ns_bvci);
break;
case BSSGP_PDUT_STATUS:
- /* FIXME: Some exception has occurred */
+ /* Some exception has occurred */
LOGP(DGPRS, LOGL_NOTICE,
- "NSEI=%u(SGSN) STATUS not implemented yet\n", nsvc->nsei);
+ "NSEI=%u(SGSN) STATUS ", nsvc->nsei);
+ if (!TLVP_PRESENT(&tp, BSSGP_IE_CAUSE)) {
+ LOGPC(DGPRS, LOGL_NOTICE, "\n");
+ goto err_mand_ie;
+ }
+ LOGPC(DGPRS, LOGL_NOTICE,
+ "cause=0x%02x(%s) ", *TLVP_VAL(&tp, BSSGP_IE_CAUSE),
+ bssgp_cause_str(*TLVP_VAL(&tp, BSSGP_IE_CAUSE)));
+ if (TLVP_PRESENT(&tp, BSSGP_IE_BVCI)) {
+ uint16_t *bvci = TLVP_VAL(&tp, BSSGP_IE_BVCI);
+ LOGPC(DGPRS, LOGL_NOTICE,
+ "BVCI=%u\n", ntohs(*bvci));
+ } else
+ LOGPC(DGPRS, LOGL_NOTICE, "\n");
break;
/* those only exist in the SGSN -> BSS direction */
case BSSGP_PDUT_SUSPEND_ACK:
@@ -365,9 +395,11 @@
case BSSGP_PDUT_SGSN_INVOKE_TRACE:
LOGP(DGPRS, LOGL_ERROR,
"NSEI=%u(SGSN) INVOKE TRACE not supported\n", nsvc->nsei);
+ rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg);
break;
default:
DEBUGP(DGPRS, "BSSGP PDU type 0x%02x unknown\n", pdu_type);
+ rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
break;
}
@@ -375,13 +407,11 @@
err_mand_ie:
LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) missing mandatory IE\n",
nsvc->nsei);
- /* FIXME: this would pull gprs_bssgp.c in, which in turn has dependencies */
- //return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
- return;
+ return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
err_no_peer:
- LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) cannot find peer based on RAC\n");
- /* FIXME */
- return;
+ LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) cannot find peer based on RAC\n",
+ nsvc->nsei);
+ return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg);
}
/* Main input function for Gb proxy */
diff --git a/openbsc/src/gprs/gb_proxy_main.c b/openbsc/src/gprs/gb_proxy_main.c
index 72f1417..1a5d7bd 100644
--- a/openbsc/src/gprs/gb_proxy_main.c
+++ b/openbsc/src/gprs/gb_proxy_main.c
@@ -39,6 +39,7 @@
#include <openbsc/signal.h>
#include <openbsc/debug.h>
#include <openbsc/gprs_ns.h>
+#include <openbsc/gprs_bssgp.h>
#include <openbsc/telnet_interface.h>
#include <openbsc/vty.h>
#include <openbsc/gb_proxy.h>
@@ -53,8 +54,6 @@
void *tall_bsc_ctx;
-struct gprs_ns_inst *gbprox_nsi;
-
const char *openbsc_version = "Osmocom NSIP Proxy " PACKAGE_VERSION;
const char *openbsc_copyright =
"Copyright (C) 2010 Harald Welte and On-Waves\n"
@@ -112,20 +111,20 @@
exit(2);
}
- gbprox_nsi = gprs_ns_instantiate(&proxy_ns_cb);
- if (!gbprox_nsi) {
+ bssgp_nsi = gprs_ns_instantiate(&proxy_ns_cb);
+ if (!bssgp_nsi) {
LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n");
exit(1);
}
- gbcfg.nsi = gbprox_nsi;
+ gbcfg.nsi = bssgp_nsi;
register_signal_handler(SS_NS, &gbprox_signal, NULL);
- nsip_listen(gbprox_nsi, gbcfg.nsip_listen_port);
+ nsip_listen(bssgp_nsi, gbcfg.nsip_listen_port);
/* 'establish' the outgoing connection to the SGSN */
sin.sin_family = AF_INET;
sin.sin_port = htons(gbcfg.nsip_sgsn_port);
sin.sin_addr.s_addr = htonl(gbcfg.nsip_sgsn_ip);
- nsip_connect(gbprox_nsi, &sin, gbcfg.nsip_sgsn_nsei,
+ nsip_connect(bssgp_nsi, &sin, gbcfg.nsip_sgsn_nsei,
gbcfg.nsip_sgsn_nsvci);
while (1) {
diff --git a/openbsc/src/gprs/gprs_bssgp.c b/openbsc/src/gprs/gprs_bssgp.c
index 0f658b9..b2f2928 100644
--- a/openbsc/src/gprs/gprs_bssgp.c
+++ b/openbsc/src/gprs/gprs_bssgp.c
@@ -39,43 +39,9 @@
/* global pointer to the gsm network data structure */
/* FIXME: this must go! */
extern struct gsm_network *bsc_gsmnet;
-struct gprs_ns_inst *bssgp_nsi;
void *bssgp_tall_ctx = NULL;
-/* BSSGP Protocol specific, not implementation specific */
-/* FIXME: This needs to go into libosmocore after finished */
-
-/* Chapter 11.3.9 / Table 11.10: Cause coding */
-static const struct value_string bssgp_cause_strings[] = {
- { BSSGP_CAUSE_PROC_OVERLOAD, "Processor overload" },
- { BSSGP_CAUSE_EQUIP_FAIL, "Equipment Failure" },
- { BSSGP_CAUSE_TRASIT_NET_FAIL, "Transit netowkr service failure" },
- { BSSGP_CAUSE_CAPA_GREATER_0KPBS,"Transmission capacity modified" },
- { BSSGP_CAUSE_UNKNOWN_MS, "Unknown MS" },
- { BSSGP_CAUSE_UNKNOWN_BVCI, "Unknown BVCI" },
- { BSSGP_CAUSE_CELL_TRAF_CONG, "Cell traffic congestion" },
- { BSSGP_CAUSE_SGSN_CONG, "SGSN congestion" },
- { BSSGP_CAUSE_OML_INTERV, "O&M intervention" },
- { BSSGP_CAUSE_BVCI_BLOCKED, "BVCI blocked" },
- { BSSGP_CAUSE_PFC_CREATE_FAIL, "PFC create failure" },
- { BSSGP_CAUSE_SEM_INCORR_PDU, "Semantically incorrect PDU" },
- { BSSGP_CAUSE_INV_MAND_INF, "Invalid mandatory information" },
- { BSSGP_CAUSE_MISSING_MAND_IE, "Missing mandatory IE" },
- { BSSGP_CAUSE_MISSING_COND_IE, "Missing conditional IE" },
- { BSSGP_CAUSE_UNEXP_COND_IE, "Unexpected conditional IE" },
- { BSSGP_CAUSE_COND_IE_ERR, "Conditional IE error" },
- { BSSGP_CAUSE_PDU_INCOMP_STATE, "PDU incompatible with protocol state" },
- { BSSGP_CAUSE_PROTO_ERR_UNSPEC, "Protocol error - unspecified" },
- { BSSGP_CAUSE_PDU_INCOMP_FEAT, "PDU not compatible with feature set" },
- { 0, NULL },
-};
-
-const char *bssgp_cause_str(enum gprs_bssgp_cause cause)
-{
- return get_value_string(bssgp_cause_strings, cause);
-}
-
/* Our actual implementation */
@@ -141,30 +107,6 @@
return ctx;
}
-static inline struct msgb *bssgp_msgb_alloc(void)
-{
- return msgb_alloc_headroom(4096, 128, "BSSGP");
-}
-
-/* Transmit a simple response such as BLOCK/UNBLOCK/RESET ACK/NACK */
-static int bssgp_tx_simple_bvci(uint8_t pdu_type, uint16_t nsei,
- uint16_t bvci, uint16_t ns_bvci)
-{
- struct msgb *msg = bssgp_msgb_alloc();
- struct bssgp_normal_hdr *bgph =
- (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
- uint16_t _bvci;
-
- msgb_nsei(msg) = nsei;
- msgb_bvci(msg) = ns_bvci;
-
- bgph->pdu_type = pdu_type;
- _bvci = htons(bvci);
- msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
-
- return gprs_ns_sendmsg(bssgp_nsi, msg);
-}
-
/* Chapter 10.4.5: Flow Control BVC ACK */
static int bssgp_tx_fc_bvc_ack(uint16_t nsei, uint8_t tag, uint16_t ns_bvci)
{
@@ -181,30 +123,6 @@
return gprs_ns_sendmsg(bssgp_nsi, msg);
}
-/* Chapter 10.4.14: Status */
-int bssgp_tx_status(uint8_t cause, uint16_t *bvci, struct msgb *orig_msg)
-{
- struct msgb *msg = bssgp_msgb_alloc();
- struct bssgp_normal_hdr *bgph =
- (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
-
- DEBUGPC(DBSSGP, "BSSGP: TX STATUS, cause=%s\n", bssgp_cause_str(cause));
- msgb_nsei(msg) = msgb_nsei(orig_msg);
- msgb_bvci(msg) = 0;
-
- bgph->pdu_type = BSSGP_PDUT_STATUS;
- msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, &cause);
- if (bvci) {
- uint16_t _bvci = htons(*bvci);
- msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
- }
- if (orig_msg)
- msgb_tvlv_put(msg, BSSGP_IE_PDU_IN_ERROR,
- msgb_bssgp_len(orig_msg), msgb_bssgph(orig_msg));
-
- 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 */
diff --git a/openbsc/src/gprs/gprs_bssgp_util.c b/openbsc/src/gprs/gprs_bssgp_util.c
new file mode 100644
index 0000000..d9b5175
--- /dev/null
+++ b/openbsc/src/gprs/gprs_bssgp_util.c
@@ -0,0 +1,119 @@
+/* GPRS BSSGP protocol implementation as per 3GPP TS 08.18 */
+
+/* (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <errno.h>
+#include <stdint.h>
+
+#include <netinet/in.h>
+
+#include <osmocore/msgb.h>
+#include <osmocore/tlv.h>
+#include <osmocore/talloc.h>
+
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/gprs_ns.h>
+
+struct gprs_ns_inst *bssgp_nsi;
+
+/* BSSGP Protocol specific, not implementation specific */
+/* FIXME: This needs to go into libosmocore after finished */
+
+/* Chapter 11.3.9 / Table 11.10: Cause coding */
+static const struct value_string bssgp_cause_strings[] = {
+ { BSSGP_CAUSE_PROC_OVERLOAD, "Processor overload" },
+ { BSSGP_CAUSE_EQUIP_FAIL, "Equipment Failure" },
+ { BSSGP_CAUSE_TRASIT_NET_FAIL, "Transit netowkr service failure" },
+ { BSSGP_CAUSE_CAPA_GREATER_0KPBS,"Transmission capacity modified" },
+ { BSSGP_CAUSE_UNKNOWN_MS, "Unknown MS" },
+ { BSSGP_CAUSE_UNKNOWN_BVCI, "Unknown BVCI" },
+ { BSSGP_CAUSE_CELL_TRAF_CONG, "Cell traffic congestion" },
+ { BSSGP_CAUSE_SGSN_CONG, "SGSN congestion" },
+ { BSSGP_CAUSE_OML_INTERV, "O&M intervention" },
+ { BSSGP_CAUSE_BVCI_BLOCKED, "BVCI blocked" },
+ { BSSGP_CAUSE_PFC_CREATE_FAIL, "PFC create failure" },
+ { BSSGP_CAUSE_SEM_INCORR_PDU, "Semantically incorrect PDU" },
+ { BSSGP_CAUSE_INV_MAND_INF, "Invalid mandatory information" },
+ { BSSGP_CAUSE_MISSING_MAND_IE, "Missing mandatory IE" },
+ { BSSGP_CAUSE_MISSING_COND_IE, "Missing conditional IE" },
+ { BSSGP_CAUSE_UNEXP_COND_IE, "Unexpected conditional IE" },
+ { BSSGP_CAUSE_COND_IE_ERR, "Conditional IE error" },
+ { BSSGP_CAUSE_PDU_INCOMP_STATE, "PDU incompatible with protocol state" },
+ { BSSGP_CAUSE_PROTO_ERR_UNSPEC, "Protocol error - unspecified" },
+ { BSSGP_CAUSE_PDU_INCOMP_FEAT, "PDU not compatible with feature set" },
+ { 0, NULL },
+};
+
+const char *bssgp_cause_str(enum gprs_bssgp_cause cause)
+{
+ return get_value_string(bssgp_cause_strings, cause);
+}
+
+
+struct msgb *bssgp_msgb_alloc(void)
+{
+ return msgb_alloc_headroom(4096, 128, "BSSGP");
+}
+
+/* Transmit a simple response such as BLOCK/UNBLOCK/RESET ACK/NACK */
+int bssgp_tx_simple_bvci(uint8_t pdu_type, uint16_t nsei,
+ uint16_t bvci, uint16_t ns_bvci)
+{
+ struct msgb *msg = bssgp_msgb_alloc();
+ struct bssgp_normal_hdr *bgph =
+ (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
+ uint16_t _bvci;
+
+ msgb_nsei(msg) = nsei;
+ msgb_bvci(msg) = ns_bvci;
+
+ bgph->pdu_type = pdu_type;
+ _bvci = htons(bvci);
+ msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
+
+ return gprs_ns_sendmsg(bssgp_nsi, msg);
+}
+
+/* Chapter 10.4.14: Status */
+int bssgp_tx_status(uint8_t cause, uint16_t *bvci, struct msgb *orig_msg)
+{
+ struct msgb *msg = bssgp_msgb_alloc();
+ struct bssgp_normal_hdr *bgph =
+ (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
+
+ DEBUGPC(DBSSGP, "BSSGP: TX STATUS, cause=%s\n", bssgp_cause_str(cause));
+ msgb_nsei(msg) = msgb_nsei(orig_msg);
+ msgb_bvci(msg) = 0;
+
+ bgph->pdu_type = BSSGP_PDUT_STATUS;
+ msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, &cause);
+ if (bvci) {
+ uint16_t _bvci = htons(*bvci);
+ msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
+ }
+ if (orig_msg)
+ msgb_tvlv_put(msg, BSSGP_IE_PDU_IN_ERROR,
+ msgb_bssgp_len(orig_msg), msgb_bssgph(orig_msg));
+
+ return gprs_ns_sendmsg(bssgp_nsi, msg);
+}