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author | Holger Hans Peter Freyther <zecke@selfish.org> | 2010-05-14 02:42:15 +0800 |
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committer | Holger Hans Peter Freyther <zecke@selfish.org> | 2010-05-14 02:42:15 +0800 |
commit | 74136415adfd8304581625d3cfd05e35bc2b9d87 (patch) | |
tree | 31952769c9ddfb54d7344c02e822e3cec3a6d80e /openbsc/src/gprs/gprs_bssgp_util.c | |
parent | 428f2301eb50447c11827abf5c96542067813021 (diff) | |
parent | 60cc6acaffe4009bf829a1d939a9d08e3287107b (diff) |
Merge branch 'master' into on-waves/mgcp
Diffstat (limited to 'openbsc/src/gprs/gprs_bssgp_util.c')
-rw-r--r-- | openbsc/src/gprs/gprs_bssgp_util.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/openbsc/src/gprs/gprs_bssgp_util.c b/openbsc/src/gprs/gprs_bssgp_util.c new file mode 100644 index 00000000..d9b5175f --- /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); +} |