mirror of https://gerrit.osmocom.org/libosmocore
118 lines
3.9 KiB
C
118 lines
3.9 KiB
C
/* GPRS BSSGP protocol implementation as per 3GPP TS 08.18 */
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/* (C) 2009-2012 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <errno.h>
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#include <stdint.h>
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#include <netinet/in.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/gsm/tlv.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/gprs/gprs_bssgp.h>
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#include <osmocom/gprs/gprs_ns.h>
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#include "common_vty.h"
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struct gprs_ns_inst *bssgp_nsi;
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/* BSSGP Protocol specific, not implementation specific */
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/* FIXME: This needs to go into libosmocore after finished */
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/* Chapter 11.3.9 / Table 11.10: Cause coding */
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static const struct value_string bssgp_cause_strings[] = {
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{ BSSGP_CAUSE_PROC_OVERLOAD, "Processor overload" },
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{ BSSGP_CAUSE_EQUIP_FAIL, "Equipment Failure" },
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{ BSSGP_CAUSE_TRASIT_NET_FAIL, "Transit netowkr service failure" },
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{ BSSGP_CAUSE_CAPA_GREATER_0KPBS,"Transmission capacity modified" },
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{ BSSGP_CAUSE_UNKNOWN_MS, "Unknown MS" },
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{ BSSGP_CAUSE_UNKNOWN_BVCI, "Unknown BVCI" },
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{ BSSGP_CAUSE_CELL_TRAF_CONG, "Cell traffic congestion" },
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{ BSSGP_CAUSE_SGSN_CONG, "SGSN congestion" },
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{ BSSGP_CAUSE_OML_INTERV, "O&M intervention" },
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{ BSSGP_CAUSE_BVCI_BLOCKED, "BVCI blocked" },
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{ BSSGP_CAUSE_PFC_CREATE_FAIL, "PFC create failure" },
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{ BSSGP_CAUSE_SEM_INCORR_PDU, "Semantically incorrect PDU" },
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{ BSSGP_CAUSE_INV_MAND_INF, "Invalid mandatory information" },
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{ BSSGP_CAUSE_MISSING_MAND_IE, "Missing mandatory IE" },
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{ BSSGP_CAUSE_MISSING_COND_IE, "Missing conditional IE" },
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{ BSSGP_CAUSE_UNEXP_COND_IE, "Unexpected conditional IE" },
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{ BSSGP_CAUSE_COND_IE_ERR, "Conditional IE error" },
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{ BSSGP_CAUSE_PDU_INCOMP_STATE, "PDU incompatible with protocol state" },
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{ BSSGP_CAUSE_PROTO_ERR_UNSPEC, "Protocol error - unspecified" },
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{ BSSGP_CAUSE_PDU_INCOMP_FEAT, "PDU not compatible with feature set" },
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{ 0, NULL },
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};
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const char *bssgp_cause_str(enum gprs_bssgp_cause cause)
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{
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return get_value_string(bssgp_cause_strings, cause);
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}
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struct msgb *bssgp_msgb_alloc(void)
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{
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return msgb_alloc_headroom(4096, 128, "BSSGP");
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}
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/* Transmit a simple response such as BLOCK/UNBLOCK/RESET ACK/NACK */
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int bssgp_tx_simple_bvci(uint8_t pdu_type, uint16_t nsei,
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uint16_t bvci, uint16_t ns_bvci)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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uint16_t _bvci;
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msgb_nsei(msg) = nsei;
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msgb_bvci(msg) = ns_bvci;
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bgph->pdu_type = pdu_type;
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_bvci = htons(bvci);
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msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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/* Chapter 10.4.14: Status */
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int bssgp_tx_status(uint8_t cause, uint16_t *bvci, struct msgb *orig_msg)
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{
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struct msgb *msg = bssgp_msgb_alloc();
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struct bssgp_normal_hdr *bgph =
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(struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
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LOGP(DBSSGP, LOGL_NOTICE, "BSSGP BVCI=%u Tx STATUS, cause=%s\n",
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bvci ? *bvci : 0, bssgp_cause_str(cause));
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msgb_nsei(msg) = msgb_nsei(orig_msg);
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msgb_bvci(msg) = 0;
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bgph->pdu_type = BSSGP_PDUT_STATUS;
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msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, &cause);
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if (bvci) {
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uint16_t _bvci = htons(*bvci);
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msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &_bvci);
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}
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msgb_tvlv_put(msg, BSSGP_IE_PDU_IN_ERROR,
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msgb_bssgp_len(orig_msg), msgb_bssgph(orig_msg));
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return gprs_ns_sendmsg(bssgp_nsi, msg);
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}
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