[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/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);
+}