From 85e109711d5b07ebc80ded03dd0b682407339800 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Fri, 4 Mar 2011 13:18:30 +0100 Subject: prefix sub-directories containing libraries with 'lib' ... and make sure tests work again after restructuring --- openbsc/src/gb/Makefile.am | 9 - openbsc/src/gb/gprs_bssgp.c | 856 ------------------------------- openbsc/src/gb/gprs_bssgp_util.c | 119 ----- openbsc/src/gb/gprs_bssgp_vty.c | 176 ------- openbsc/src/gb/gprs_ns.c | 992 ------------------------------------ openbsc/src/gb/gprs_ns_frgre.c | 304 ----------- openbsc/src/gb/gprs_ns_vty.c | 569 --------------------- openbsc/src/libgb/Makefile.am | 9 + openbsc/src/libgb/gprs_bssgp.c | 856 +++++++++++++++++++++++++++++++ openbsc/src/libgb/gprs_bssgp_util.c | 119 +++++ openbsc/src/libgb/gprs_bssgp_vty.c | 176 +++++++ openbsc/src/libgb/gprs_ns.c | 992 ++++++++++++++++++++++++++++++++++++ openbsc/src/libgb/gprs_ns_frgre.c | 304 +++++++++++ openbsc/src/libgb/gprs_ns_vty.c | 569 +++++++++++++++++++++ 14 files changed, 3025 insertions(+), 3025 deletions(-) delete mode 100644 openbsc/src/gb/Makefile.am delete mode 100644 openbsc/src/gb/gprs_bssgp.c delete mode 100644 openbsc/src/gb/gprs_bssgp_util.c delete mode 100644 openbsc/src/gb/gprs_bssgp_vty.c delete mode 100644 openbsc/src/gb/gprs_ns.c delete mode 100644 openbsc/src/gb/gprs_ns_frgre.c delete mode 100644 openbsc/src/gb/gprs_ns_vty.c create mode 100644 openbsc/src/libgb/Makefile.am create mode 100644 openbsc/src/libgb/gprs_bssgp.c create mode 100644 openbsc/src/libgb/gprs_bssgp_util.c create mode 100644 openbsc/src/libgb/gprs_bssgp_vty.c create mode 100644 openbsc/src/libgb/gprs_ns.c create mode 100644 openbsc/src/libgb/gprs_ns_frgre.c create mode 100644 openbsc/src/libgb/gprs_ns_vty.c diff --git a/openbsc/src/gb/Makefile.am b/openbsc/src/gb/Makefile.am deleted file mode 100644 index b48b1779..00000000 --- a/openbsc/src/gb/Makefile.am +++ /dev/null @@ -1,9 +0,0 @@ -INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir) -AM_CFLAGS=-Wall -fno-strict-aliasing $(LIBOSMOCORE_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS) -AM_LDFLAGS = $(LIBOSMOCORE_LIBS) $(LIBOSMOVTY_LIBS) $(COVERAGE_LDFLAGS) - -noinst_LIBRARIES = libgb.a - -libgb_a_SOURCES = gprs_ns.c gprs_ns_frgre.c gprs_ns_vty.c \ - gprs_bssgp.c gprs_bssgp_util.c gprs_bssgp_vty.c -#gprs_llc.c gprs_llc_vty.c crc24.c diff --git a/openbsc/src/gb/gprs_bssgp.c b/openbsc/src/gb/gprs_bssgp.c deleted file mode 100644 index eca34b98..00000000 --- a/openbsc/src/gb/gprs_bssgp.c +++ /dev/null @@ -1,856 +0,0 @@ -/* GPRS BSSGP protocol implementation as per 3GPP TS 08.18 */ - -/* (C) 2009-2010 by Harald Welte - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 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 Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see . - * - * TODO: - * o properly count incoming BVC-RESET packets in counter group - * o set log context as early as possible for outgoing packets - */ - -#include -#include - -#include - -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include - -void *bssgp_tall_ctx = NULL; - -#define BVC_F_BLOCKED 0x0001 - -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, -}; - -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" }, -}; - -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, -}; - -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) -{ - struct bssgp_bvc_ctx *bctx; - - 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; - } - return NULL; -} - -/* Find a BTS context based on BVCI+NSEI tuple */ -struct bssgp_bvc_ctx *btsctx_by_bvci_nsei(uint16_t bvci, uint16_t nsei) -{ - struct bssgp_bvc_ctx *bctx; - - llist_for_each_entry(bctx, &bssgp_bvc_ctxts, list) { - if (bctx->nsei == nsei && bctx->bvci == bvci) - return bctx; - } - return NULL; -} - -struct bssgp_bvc_ctx *btsctx_alloc(uint16_t bvci, uint16_t nsei) -{ - struct bssgp_bvc_ctx *ctx; - - ctx = talloc_zero(bssgp_tall_ctx, struct bssgp_bvc_ctx); - if (!ctx) - return NULL; - ctx->bvci = bvci; - ctx->nsei = nsei; - /* 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; -} - -/* 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) -{ - struct msgb *msg = bssgp_msgb_alloc(); - struct bssgp_normal_hdr *bgph = - (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph)); - - msgb_nsei(msg) = nsei; - msgb_bvci(msg) = ns_bvci; - - bgph->pdu_type = BSSGP_PDUT_FLOW_CONTROL_BVC_ACK; - msgb_tvlv_put(msg, BSSGP_IE_TAG, 1, &tag); - - 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, - 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); -} - -/* 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 */ - gsm48_parse_ra(raid, buf); - /* 2 octets CID */ - return ntohs(*(uint16_t *) (buf+6)); -} - -/* Chapter 8.4 BVC-Reset Procedure */ -static int bssgp_rx_bvc_reset(struct msgb *msg, struct tlv_parsed *tp, - uint16_t ns_bvci) -{ - 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)); - 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 */ - bctx = btsctx_by_bvci_nsei(bvci, nsei); - 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 BVCI=%u RESET " - "missing mandatory IE\n", bvci); - return -EINVAL; - } - /* actually extract RAC / CID */ - bctx->cell_id = bssgp_parse_cell_id(&bctx->ra_id, - TLVP_VAL(tp, BSSGP_IE_CELL_ID)); - LOGP(DBSSGP, LOGL_NOTICE, "Cell %u-%u-%u-%u CI %u on BVCI %u\n", - bctx->ra_id.mcc, bctx->ra_id.mnc, bctx->ra_id.lac, - bctx->ra_id.rac, bctx->cell_id, bvci); - } - - /* Acknowledge the RESET to the BTS */ - rc = bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_RESET_ACK, - nsei, bvci, ns_bvci); - 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, struct tlv_parsed *tp, - struct bssgp_bvc_ctx *ctx) -{ - struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg); - - /* extract TLLI and parse TLV IEs */ - msgb_tlli(msg) = ntohl(budh->tlli); - - DEBUGP(DBSSGP, "BSSGP TLLI=0x%08x UPLINK-UNITDATA\n", msgb_tlli(msg)); - - /* 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) = (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); -} - -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); - struct gprs_ra_id raid; - uint32_t tlli; - int rc; - - 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)); - - 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 bssgp_tx_suspend_nack(msgb_nsei(msg), tlli, &raid, NULL); - - bssgp_tx_suspend_ack(msgb_nsei(msg), tlli, &raid, 0); - - return 0; -} - -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); - struct gprs_ra_id raid; - uint32_t tlli; - uint8_t suspend_ref; - int rc; - - 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); - - 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 bssgp_tx_resume_nack(msgb_nsei(msg), tlli, &raid, - NULL); - - bssgp_tx_resume_ack(msgb_nsei(msg), tlli, &raid); - return 0; -} - - -static int bssgp_rx_llc_disc(struct msgb *msg, struct tlv_parsed *tp, - struct bssgp_bvc_ctx *ctx) -{ - uint32_t tlli = 0; - - 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); - } - - if (TLVP_PRESENT(tp, BSSGP_IE_TLLI)) - tlli = ntohl(*(uint32_t *)TLVP_VAL(tp, BSSGP_IE_TLLI)); - - DEBUGP(DBSSGP, "BSSGP BVCI=%u TLLI=%08x 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, - struct bssgp_bvc_ctx *bctx) -{ - - 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)) { - 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 */ - - /* Send FLOW_CONTROL_BVC_ACK */ - return bssgp_tx_fc_bvc_ack(msgb_nsei(msg), *TLVP_VAL(tp, BSSGP_IE_TAG), - msgb_bvci(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); - uint8_t pdu_type = bgph->pdu_type; - int rc = 0; - - /* 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, tp, bctx); - break; - case BSSGP_PDUT_RA_CAPABILITY: - /* BSS requests RA capability or IMSI */ - 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 BVCI=%u Rx RADIO STATUS\n", bctx->bvci); - /* BSS informs us of some exception */ - /* 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, tp, bctx); - break; - case BSSGP_PDUT_RESUME: - /* MS wants to resume */ - rc = bssgp_rx_resume(msg, tp, bctx); - break; - 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 */ - rc = bssgp_rx_llc_disc(msg, tp, bctx); - break; - case BSSGP_PDUT_BVC_BLOCK: - /* BSS tells us that BVC shall be blocked */ - 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; - } - rc = bssgp_rx_bvc_block(msg, tp); - break; - case BSSGP_PDUT_BVC_UNBLOCK: - /* BSS tells us that BVC shall be unblocked */ - if (!TLVP_PRESENT(tp, BSSGP_IE_BVCI)) { - LOGP(DBSSGP, LOGL_ERROR, "BSSGP Rx BVC-UNBLOCK " - "missing mandatory IE\n"); - goto err_mand_ie; - } - rc = bssgp_rx_bvc_unblock(msg, tp); - break; - case BSSGP_PDUT_BVC_RESET: - /* BSS tells us that BVC init is required */ - 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); - break; - case BSSGP_PDUT_STATUS: - /* Some exception has occurred */ - 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_PAGING_PS: - case BSSGP_PDUT_PAGING_CS: - 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: - case BSSGP_PDUT_BVC_BLOCK_ACK: - case BSSGP_PDUT_BVC_UNBLOCK_ACK: - case BSSGP_PDUT_SGSN_INVOKE_TRACE: - 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 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; - } - - return rc; -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, struct sgsn_mm_ctx *mmctx) -{ - struct bssgp_bvc_ctx *bctx; - struct bssgp_ud_hdr *budh; - uint8_t llc_pdu_tlv_hdr_len = 2; - uint8_t *llc_pdu_tlv, *qos_profile; - uint16_t pdu_lifetime = 1000; /* centi-seconds */ - uint8_t qos_profile_default[3] = { 0x00, 0x00, 0x20 }; - uint16_t msg_len = msg->len; - uint16_t bvci = msgb_bvci(msg); - uint16_t nsei = msgb_nsei(msg); - uint16_t drx_params; - - /* Identifiers from UP: TLLI, BVCI, NSEI (all in msgb->cb) */ - if (bvci <= BVCI_PTM ) { - LOGP(DBSSGP, LOGL_ERROR, "Cannot send DL-UD to BVCI %u\n", - bvci); - return -EINVAL; - } - - bctx = btsctx_by_bvci_nsei(bvci, nsei); - if (!bctx) { - /* FIXME: don't simply create missing context, but reject message */ - bctx = btsctx_alloc(bvci, nsei); - } - - if (msg->len > TVLV_MAX_ONEBYTE) - llc_pdu_tlv_hdr_len += 1; - - /* prepend the tag and length of the LLC-PDU TLV */ - llc_pdu_tlv = msgb_push(msg, llc_pdu_tlv_hdr_len); - llc_pdu_tlv[0] = BSSGP_IE_LLC_PDU; - if (llc_pdu_tlv_hdr_len > 2) { - llc_pdu_tlv[1] = msg_len >> 8; - llc_pdu_tlv[2] = msg_len & 0xff; - } else { - llc_pdu_tlv[1] = msg_len & 0x7f; - llc_pdu_tlv[1] |= 0x80; - } - - /* FIXME: optional elements: Alignment, UTRAN CCO, LSA, PFI */ - - if (mmctx) { - /* Old TLLI to help BSS map from old->new */ -#if 0 - if (mmctx->tlli_old) - msgb_tvlv_push(msg, BSSGP_IE_TLLI, 4, htonl(*tlli_old)); -#endif - - /* IMSI */ - if (strlen(mmctx->imsi)) { - uint8_t mi[10]; - int imsi_len = gsm48_generate_mid_from_imsi(mi, mmctx->imsi); - if (imsi_len > 2) - msgb_tvlv_push(msg, BSSGP_IE_IMSI, - imsi_len-2, mi+2); - } - - /* DRX parameters */ - drx_params = htons(mmctx->drx_parms); - msgb_tvlv_push(msg, BSSGP_IE_DRX_PARAMS, 2, - (uint8_t *) &drx_params); - - /* FIXME: Priority */ - - /* MS Radio Access Capability */ - if (mmctx->ms_radio_access_capa.len) - msgb_tvlv_push(msg, BSSGP_IE_MS_RADIO_ACCESS_CAP, - mmctx->ms_radio_access_capa.len, - mmctx->ms_radio_access_capa.buf); - } - - /* prepend the pdu lifetime */ - pdu_lifetime = htons(pdu_lifetime); - msgb_tvlv_push(msg, BSSGP_IE_PDU_LIFETIME, 2, (uint8_t *)&pdu_lifetime); - - /* prepend the QoS profile, TLLI and pdu type */ - budh = (struct bssgp_ud_hdr *) msgb_push(msg, sizeof(*budh)); - memcpy(budh->qos_profile, qos_profile_default, sizeof(qos_profile_default)); - budh->tlli = htonl(msgb_tlli(msg)); - budh->pdu_type = BSSGP_PDUT_DL_UNITDATA; - - rate_ctr_inc(&bctx->ctrg->ctr[BSSGP_CTR_PKTS_OUT]); - rate_ctr_add(&bctx->ctrg->ctr[BSSGP_CTR_BYTES_OUT], msg->len); - - /* Identifiers down: BVCI, NSEI (in msgb->cb) */ - - return gprs_ns_sendmsg(bssgp_nsi, msg); -} - -/* 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) -{ - struct msgb *msg = bssgp_msgb_alloc(); - struct bssgp_normal_hdr *bgph = - (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph)); - uint16_t drx_params = htons(pinfo->drx_params); - uint8_t mi[10]; - int imsi_len = gsm48_generate_mid_from_imsi(mi, pinfo->imsi); - uint8_t ra[6]; - - if (imsi_len < 2) - return -EINVAL; - - msgb_nsei(msg) = nsei; - msgb_bvci(msg) = ns_bvci; - - if (pinfo->mode == BSSGP_PAGING_PS) - bgph->pdu_type = BSSGP_PDUT_PAGING_PS; - else - bgph->pdu_type = BSSGP_PDUT_PAGING_CS; - /* IMSI */ - msgb_tvlv_put(msg, BSSGP_IE_IMSI, imsi_len-2, mi+2); - /* DRX Parameters */ - msgb_tvlv_put(msg, BSSGP_IE_DRX_PARAMS, 2, - (uint8_t *) &drx_params); - /* Scope */ - switch (pinfo->scope) { - case BSSGP_PAGING_BSS_AREA: - { - uint8_t null = 0; - msgb_tvlv_put(msg, BSSGP_IE_BSS_AREA_ID, 1, &null); - } - break; - case BSSGP_PAGING_LOCATION_AREA: - gsm48_construct_ra(ra, &pinfo->raid); - msgb_tvlv_put(msg, BSSGP_IE_LOCATION_AREA, 4, ra); - break; - case BSSGP_PAGING_ROUTEING_AREA: - gsm48_construct_ra(ra, &pinfo->raid); - msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, 6, ra); - break; - case BSSGP_PAGING_BVCI: - { - uint16_t bvci = htons(pinfo->bvci); - msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *)&bvci); - } - break; - } - /* QoS profile mandatory for PS */ - if (pinfo->mode == BSSGP_PAGING_PS) - msgb_tvlv_put(msg, BSSGP_IE_QOS_PROFILE, 3, pinfo->qos); - - /* Optional (P-)TMSI */ - if (pinfo->ptmsi) { - uint32_t ptmsi = htonl(*pinfo->ptmsi); - msgb_tvlv_put(msg, BSSGP_IE_TMSI, 4, (uint8_t *) &ptmsi); - } - - return gprs_ns_sendmsg(bssgp_nsi, msg); -} diff --git a/openbsc/src/gb/gprs_bssgp_util.c b/openbsc/src/gb/gprs_bssgp_util.c deleted file mode 100644 index f8e3b569..00000000 --- a/openbsc/src/gb/gprs_bssgp_util.c +++ /dev/null @@ -1,119 +0,0 @@ -/* GPRS BSSGP protocol implementation as per 3GPP TS 08.18 */ - -/* (C) 2009-2010 by Harald Welte - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 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 Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see . - * - */ - -#include -#include - -#include - -#include -#include -#include - -#include -#include -#include -#include - -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)); - - LOGP(DBSSGP, LOGL_NOTICE, "BSSGP BVCI=%u Tx STATUS, cause=%s\n", - bvci ? *bvci : 0, 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); -} diff --git a/openbsc/src/gb/gprs_bssgp_vty.c b/openbsc/src/gb/gprs_bssgp_vty.c deleted file mode 100644 index 9ebd0900..00000000 --- a/openbsc/src/gb/gprs_bssgp_vty.c +++ /dev/null @@ -1,176 +0,0 @@ -/* VTY interface for our GPRS BSS Gateway Protocol (BSSGP) implementation */ - -/* (C) 2010 by Harald Welte - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 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 Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see . - * - */ - -#include -#include -#include -#include - -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -/* FIXME: this should go to some common file as it is copied - * in vty_interface.c of the BSC */ -static const struct value_string gprs_bssgp_timer_strs[] = { - { 0, NULL } -}; - -static struct cmd_node bssgp_node = { - BSSGP_NODE, - "%s(bssgp)#", - 1, -}; - -static int config_write_bssgp(struct vty *vty) -{ - vty_out(vty, "bssgp%s", VTY_NEWLINE); - - return CMD_SUCCESS; -} - -DEFUN(cfg_bssgp, cfg_bssgp_cmd, - "bssgp", - "Configure the GPRS BSS Gateway Protocol") -{ - vty->node = BSSGP_NODE; - return CMD_SUCCESS; -} - -static void dump_bvc(struct vty *vty, struct bssgp_bvc_ctx *bvc, int stats) -{ - vty_out(vty, "NSEI %5u, BVCI %5u, RA-ID: %u-%u-%u-%u, CID: %u, " - "STATE: %s%s", bvc->nsei, bvc->bvci, bvc->ra_id.mcc, - bvc->ra_id.mnc, bvc->ra_id.lac, bvc->ra_id.rac, bvc->cell_id, - bvc->state & BVC_S_BLOCKED ? "BLOCKED" : "UNBLOCKED", - VTY_NEWLINE); - if (stats) - vty_out_rate_ctr_group(vty, " ", bvc->ctrg); -} - -static void dump_bssgp(struct vty *vty, int stats) -{ - struct bssgp_bvc_ctx *bvc; - - llist_for_each_entry(bvc, &bssgp_bvc_ctxts, list) { - dump_bvc(vty, bvc, stats); - } -} - -#define BSSGP_STR "Show information about the BSSGP protocol\n" - -DEFUN(show_bssgp, show_bssgp_cmd, "show bssgp", - SHOW_STR BSSGP_STR) -{ - dump_bssgp(vty, 0); - return CMD_SUCCESS; -} - -DEFUN(show_bssgp_stats, show_bssgp_stats_cmd, "show bssgp stats", - SHOW_STR BSSGP_STR - "Include statistics\n") -{ - dump_bssgp(vty, 1); - return CMD_SUCCESS; -} - -DEFUN(show_bvc, show_bvc_cmd, "show bssgp nsei <0-65535> [stats]", - SHOW_STR BSSGP_STR - "Show all BVCs on one NSE\n" - "The NSEI\n" "Include Statistics\n") -{ - struct bssgp_bvc_ctx *bvc; - uint16_t nsei = atoi(argv[1]); - int show_stats = 0; - - if (argc >= 2) - show_stats = 1; - - llist_for_each_entry(bvc, &bssgp_bvc_ctxts, list) { - if (bvc->nsei != nsei) - continue; - dump_bvc(vty, bvc, show_stats); - } - - return CMD_SUCCESS; -} - -DEFUN(logging_fltr_bvc, - logging_fltr_bvc_cmd, - "logging filter bvc nsei <0-65535> bvci <0-65535>", - LOGGING_STR FILTER_STR - "Filter based on BSSGP Virtual Connection\n" - "NSEI of the BVC to be filtered\n" - "Network Service Entity Identifier (NSEI)\n" - "BVCI of the BVC to be filtered\n" - "BSSGP Virtual Connection Identifier (BVCI)\n") -{ - struct log_target *tgt = osmo_log_vty2tgt(vty); - struct bssgp_bvc_ctx *bvc; - uint16_t nsei = atoi(argv[0]); - uint16_t bvci = atoi(argv[1]); - - if (!tgt) - return CMD_WARNING; - - bvc = btsctx_by_bvci_nsei(bvci, nsei); - if (!bvc) { - vty_out(vty, "No BVC by that identifier%s", VTY_NEWLINE); - return CMD_WARNING; - } - - log_set_bvc_filter(tgt, bvc); - return CMD_SUCCESS; -} - -int gprs_bssgp_vty_init(void) -{ - install_element_ve(&show_bssgp_cmd); - install_element_ve(&show_bssgp_stats_cmd); - install_element_ve(&show_bvc_cmd); - install_element_ve(&logging_fltr_bvc_cmd); - - install_element(CFG_LOG_NODE, &logging_fltr_bvc_cmd); - - install_element(CONFIG_NODE, &cfg_bssgp_cmd); - install_node(&bssgp_node, config_write_bssgp); - install_default(BSSGP_NODE); - install_element(BSSGP_NODE, &ournode_exit_cmd); - install_element(BSSGP_NODE, &ournode_end_cmd); - //install_element(BSSGP_NODE, &cfg_bssgp_timer_cmd); - - return 0; -} diff --git a/openbsc/src/gb/gprs_ns.c b/openbsc/src/gb/gprs_ns.c deleted file mode 100644 index 5a8e3586..00000000 --- a/openbsc/src/gb/gprs_ns.c +++ /dev/null @@ -1,992 +0,0 @@ -/* GPRS Networks Service (NS) messages on the Gb interfacebvci = msgb_bvci(msg); - * 3GPP TS 08.16 version 8.0.1 Release 1999 / ETSI TS 101 299 V8.0.1 (2002-05) */ - -/* (C) 2009-2010 by Harald Welte - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 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 Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see . - * - */ - -/* Some introduction into NS: NS is used typically on top of frame relay, - * but in the ip.access world it is encapsulated in UDP packets. It serves - * as an intermediate shim betwen BSSGP and the underlying medium. It doesn't - * do much, apart from providing congestion notification and status indication. - * - * Terms: - * NS Network Service - * NSVC NS Virtual Connection - * NSEI NS Entity Identifier - * NSVL NS Virtual Link - * NSVLI NS Virtual Link Identifier - * BVC BSSGP Virtual Connection - * BVCI BSSGP Virtual Connection Identifier - * NSVCG NS Virtual Connection Goup - * Blocked NS-VC cannot be used for user traffic - * Alive Ability of a NS-VC to provide communication - * - * There can be multiple BSSGP virtual connections over one (group of) NSVC's. BSSGP will - * therefore identify the BSSGP virtual connection by a BVCI passed down to NS. - * NS then has to firgure out which NSVC's are responsible for this BVCI. - * Those mappings are administratively configured. - */ - -/* This implementation has the following limitations: - * o Only one NS-VC for each NSE: No load-sharing function - * o NSVCI 65535 and 65534 are reserved for internal use - * o Only UDP is supported as of now, no frame relay support - * o The IP Sub-Network-Service (SNS) as specified in 48.016 is not implemented - * o There are no BLOCK and UNBLOCK timers (yet?) - */ - -#include -#include -#include -#include - -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -static const struct tlv_definition ns_att_tlvdef = { - .def = { - [NS_IE_CAUSE] = { TLV_TYPE_TvLV, 0 }, - [NS_IE_VCI] = { TLV_TYPE_TvLV, 0 }, - [NS_IE_PDU] = { TLV_TYPE_TvLV, 0 }, - [NS_IE_BVCI] = { TLV_TYPE_TvLV, 0 }, - [NS_IE_NSEI] = { TLV_TYPE_TvLV, 0 }, - }, -}; - -enum ns_ctr { - NS_CTR_PKTS_IN, - NS_CTR_PKTS_OUT, - NS_CTR_BYTES_IN, - NS_CTR_BYTES_OUT, - NS_CTR_BLOCKED, - NS_CTR_DEAD, -}; - -static const struct rate_ctr_desc nsvc_ctr_description[] = { - { "packets.in", "Packets at NS Level ( In)" }, - { "packets.out","Packets at NS Level (Out)" }, - { "bytes.in", "Bytes at NS Level ( In)" }, - { "bytes.out", "Bytes at NS Level (Out)" }, - { "blocked", "NS-VC Block count " }, - { "dead", "NS-VC gone dead count " }, -}; - -static const struct rate_ctr_group_desc nsvc_ctrg_desc = { - .group_name_prefix = "ns.nsvc", - .group_description = "NSVC Peer Statistics", - .num_ctr = ARRAY_SIZE(nsvc_ctr_description), - .ctr_desc = nsvc_ctr_description, -}; - -/* Lookup struct gprs_nsvc based on NSVCI */ -struct gprs_nsvc *nsvc_by_nsvci(struct gprs_ns_inst *nsi, uint16_t nsvci) -{ - struct gprs_nsvc *nsvc; - llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { - if (nsvc->nsvci == nsvci) - return nsvc; - } - return NULL; -} - -/* Lookup struct gprs_nsvc based on NSVCI */ -struct gprs_nsvc *nsvc_by_nsei(struct gprs_ns_inst *nsi, uint16_t nsei) -{ - struct gprs_nsvc *nsvc; - llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { - if (nsvc->nsei == nsei) - return nsvc; - } - return NULL; -} - -/* Lookup struct gprs_nsvc based on remote peer socket addr */ -static struct gprs_nsvc *nsvc_by_rem_addr(struct gprs_ns_inst *nsi, - struct sockaddr_in *sin) -{ - struct gprs_nsvc *nsvc; - llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) { - if (nsvc->ip.bts_addr.sin_addr.s_addr == - sin->sin_addr.s_addr && - nsvc->ip.bts_addr.sin_port == sin->sin_port) - return nsvc; - } - return NULL; -} - -static void gprs_ns_timer_cb(void *data); - -struct gprs_nsvc *nsvc_create(struct gprs_ns_inst *nsi, uint16_t nsvci) -{ - struct gprs_nsvc *nsvc; - - LOGP(DNS, LOGL_INFO, "NSVCI=%u Creating NS-VC\n", nsvci); - - nsvc = talloc_zero(nsi, struct gprs_nsvc); - nsvc->nsvci = nsvci; - /* before RESET procedure: BLOCKED and DEAD */ - nsvc->state = NSE_S_BLOCKED; - nsvc->nsi = nsi; - nsvc->timer.cb = gprs_ns_timer_cb; - nsvc->timer.data = nsvc; - nsvc->ctrg = rate_ctr_group_alloc(nsvc, &nsvc_ctrg_desc, nsvci); - - llist_add(&nsvc->list, &nsi->gprs_nsvcs); - - return nsvc; -} - -void nsvc_delete(struct gprs_nsvc *nsvc) -{ - if (bsc_timer_pending(&nsvc->timer)) - bsc_del_timer(&nsvc->timer); - llist_del(&nsvc->list); - talloc_free(nsvc); -} - -static void ns_dispatch_signal(struct gprs_nsvc *nsvc, unsigned int signal, - uint8_t cause) -{ - struct ns_signal_data nssd; - - nssd.nsvc = nsvc; - nssd.cause = cause; - - dispatch_signal(SS_NS, signal, &nssd); -} - -/* Section 10.3.2, Table 13 */ -static const struct value_string ns_cause_str[] = { - { NS_CAUSE_TRANSIT_FAIL, "Transit network failure" }, - { NS_CAUSE_OM_INTERVENTION, "O&M intervention" }, - { NS_CAUSE_EQUIP_FAIL, "Equipment failure" }, - { NS_CAUSE_NSVC_BLOCKED, "NS-VC blocked" }, - { NS_CAUSE_NSVC_UNKNOWN, "NS-VC unknown" }, - { NS_CAUSE_BVCI_UNKNOWN, "BVCI unknown" }, - { NS_CAUSE_SEM_INCORR_PDU, "Semantically incorrect PDU" }, - { NS_CAUSE_PDU_INCOMP_PSTATE, "PDU not compatible with protocol state" }, - { NS_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, - { NS_CAUSE_INVAL_ESSENT_IE, "Invalid essential IE" }, - { NS_CAUSE_MISSING_ESSENT_IE, "Missing essential IE" }, - { 0, NULL } -}; - -const char *gprs_ns_cause_str(enum ns_cause cause) -{ - return get_value_string(ns_cause_str, cause); -} - -static int nsip_sendmsg(struct gprs_nsvc *nsvc, struct msgb *msg); -extern int grps_ns_frgre_sendmsg(struct gprs_nsvc *nsvc, struct msgb *msg); - -static int gprs_ns_tx(struct gprs_nsvc *nsvc, struct msgb *msg) -{ - int ret; - - log_set_context(BSC_CTX_NSVC, nsvc); - - /* Increment number of Uplink bytes */ - rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_PKTS_OUT]); - rate_ctr_add(&nsvc->ctrg->ctr[NS_CTR_BYTES_OUT], msgb_l2len(msg)); - - switch (nsvc->ll) { - case GPRS_NS_LL_UDP: - ret = nsip_sendmsg(nsvc, msg); - break; - case GPRS_NS_LL_FR_GRE: - ret = gprs_ns_frgre_sendmsg(nsvc, msg); - break; - default: - LOGP(DNS, LOGL_ERROR, "unsupported NS linklayer %u\n", nsvc->ll); - msgb_free(msg); - ret = -EIO; - break; - } - return ret; -} - -static int gprs_ns_tx_simple(struct gprs_nsvc *nsvc, uint8_t pdu_type) -{ - struct msgb *msg = gprs_ns_msgb_alloc(); - struct gprs_ns_hdr *nsh; - - log_set_context(BSC_CTX_NSVC, nsvc); - - if (!msg) - return -ENOMEM; - - msg->l2h = msgb_put(msg, sizeof(*nsh)); - nsh = (struct gprs_ns_hdr *) msg->l2h; - - nsh->pdu_type = pdu_type; - - return gprs_ns_tx(nsvc, msg); -} - -int gprs_ns_tx_reset(struct gprs_nsvc *nsvc, uint8_t cause) -{ - struct msgb *msg = gprs_ns_msgb_alloc(); - struct gprs_ns_hdr *nsh; - uint16_t nsvci = htons(nsvc->nsvci); - uint16_t nsei = htons(nsvc->nsei); - - log_set_context(BSC_CTX_NSVC, nsvc); - - if (!msg) - return -ENOMEM; - - LOGP(DNS, LOGL_INFO, "NSEI=%u Tx NS RESET (NSVCI=%u, cause=%s)\n", - nsvc->nsei, nsvc->nsvci, gprs_ns_cause_str(cause)); - - msg->l2h = msgb_put(msg, sizeof(*nsh)); - nsh = (struct gprs_ns_hdr *) msg->l2h; - nsh->pdu_type = NS_PDUT_RESET; - - msgb_tvlv_put(msg, NS_IE_CAUSE, 1, &cause); - msgb_tvlv_put(msg, NS_IE_VCI, 2, (uint8_t *) &nsvci); - msgb_tvlv_put(msg, NS_IE_NSEI, 2, (uint8_t *) &nsei); - - return gprs_ns_tx(nsvc, msg); - -} - -int gprs_ns_tx_status(struct gprs_nsvc *nsvc, uint8_t cause, - uint16_t bvci, struct msgb *orig_msg) -{ - struct msgb *msg = gprs_ns_msgb_alloc(); - struct gprs_ns_hdr *nsh; - uint16_t nsvci = htons(nsvc->nsvci); - - log_set_context(BSC_CTX_NSVC, nsvc); - - bvci = htons(bvci); - - if (!msg) - return -ENOMEM; - - LOGP(DNS, LOGL_NOTICE, "NSEI=%u Tx NS STATUS (NSVCI=%u, cause=%s)\n", - nsvc->nsei, nsvc->nsvci, gprs_ns_cause_str(cause)); - - msg->l2h = msgb_put(msg, sizeof(*nsh)); - nsh = (struct gprs_ns_hdr *) msg->l2h; - nsh->pdu_type = NS_PDUT_STATUS; - - msgb_tvlv_put(msg, NS_IE_CAUSE, 1, &cause); - - /* Section 9.2.7.1: Static conditions for NS-VCI */ - if (cause == NS_CAUSE_NSVC_BLOCKED || - cause == NS_CAUSE_NSVC_UNKNOWN) - msgb_tvlv_put(msg, NS_IE_VCI, 2, (uint8_t *)&nsvci); - - /* Section 9.2.7.2: Static conditions for NS PDU */ - switch (cause) { - case NS_CAUSE_SEM_INCORR_PDU: - case NS_CAUSE_PDU_INCOMP_PSTATE: - case NS_CAUSE_PROTO_ERR_UNSPEC: - case NS_CAUSE_INVAL_ESSENT_IE: - case NS_CAUSE_MISSING_ESSENT_IE: - msgb_tvlv_put(msg, NS_IE_PDU, msgb_l2len(orig_msg), - orig_msg->l2h); - break; - default: - break; - } - - /* Section 9.2.7.3: Static conditions for BVCI */ - if (cause == NS_CAUSE_BVCI_UNKNOWN) - msgb_tvlv_put(msg, NS_IE_VCI, 2, (uint8_t *)&bvci); - - return gprs_ns_tx(nsvc, msg); -} - -int gprs_ns_tx_block(struct gprs_nsvc *nsvc, uint8_t cause) -{ - struct msgb *msg = gprs_ns_msgb_alloc(); - struct gprs_ns_hdr *nsh; - uint16_t nsvci = htons(nsvc->nsvci); - - log_set_context(BSC_CTX_NSVC, nsvc); - - if (!msg) - return -ENOMEM; - - LOGP(DNS, LOGL_INFO, "NSEI=%u Tx NS BLOCK (NSVCI=%u, cause=%s)\n", - nsvc->nsei, nsvc->nsvci, gprs_ns_cause_str(cause)); - - /* be conservative and mark it as blocked even now! */ - nsvc->state |= NSE_S_BLOCKED; - rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_BLOCKED]); - - msg->l2h = msgb_put(msg, sizeof(*nsh)); - nsh = (struct gprs_ns_hdr *) msg->l2h; - nsh->pdu_type = NS_PDUT_BLOCK; - - msgb_tvlv_put(msg, NS_IE_CAUSE, 1, &cause); - msgb_tvlv_put(msg, NS_IE_VCI, 2, (uint8_t *) &nsvci); - - return gprs_ns_tx(nsvc, msg); -} - -int gprs_ns_tx_unblock(struct gprs_nsvc *nsvc) -{ - log_set_context(BSC_CTX_NSVC, nsvc); - LOGP(DNS, LOGL_INFO, "NSEI=%u Tx NS UNBLOCK (NSVCI=%u)\n", - nsvc->nsei, nsvc->nsvci); - - return gprs_ns_tx_simple(nsvc, NS_PDUT_UNBLOCK); -} - -int gprs_ns_tx_alive(struct gprs_nsvc *nsvc) -{ - log_set_context(BSC_CTX_NSVC, nsvc); - LOGP(DNS, LOGL_DEBUG, "NSEI=%u Tx NS ALIVE (NSVCI=%u)\n", - nsvc->nsei, nsvc->nsvci); - - return gprs_ns_tx_simple(nsvc, NS_PDUT_ALIVE); -} - -int gprs_ns_tx_alive_ack(struct gprs_nsvc *nsvc) -{ - log_set_context(BSC_CTX_NSVC, nsvc); - LOGP(DNS, LOGL_DEBUG, "NSEI=%u Tx NS ALIVE_ACK (NSVCI=%u)\n", - nsvc->nsei, nsvc->nsvci); - - return gprs_ns_tx_simple(nsvc, NS_PDUT_ALIVE_ACK); -} - -static const enum ns_timeout timer_mode_tout[_NSVC_TIMER_NR] = { - [NSVC_TIMER_TNS_RESET] = NS_TOUT_TNS_RESET, - [NSVC_TIMER_TNS_ALIVE] = NS_TOUT_TNS_ALIVE, - [NSVC_TIMER_TNS_TEST] = NS_TOUT_TNS_TEST, -}; - -static const struct value_string timer_mode_strs[] = { - { NSVC_TIMER_TNS_RESET, "tns-reset" }, - { NSVC_TIMER_TNS_ALIVE, "tns-alive" }, - { NSVC_TIMER_TNS_TEST, "tns-test" }, - { 0, NULL } -}; - -static void nsvc_start_timer(struct gprs_nsvc *nsvc, enum nsvc_timer_mode mode) -{ - enum ns_timeout tout = timer_mode_tout[mode]; - unsigned int seconds = nsvc->nsi->timeout[tout]; - - log_set_context(BSC_CTX_NSVC, nsvc); - DEBUGP(DNS, "NSEI=%u Starting timer in mode %s (%u seconds)\n", - nsvc->nsei, get_value_string(timer_mode_strs, mode), - seconds); - - if (bsc_timer_pending(&nsvc->timer)) - bsc_del_timer(&nsvc->timer); - - nsvc->timer_mode = mode; - bsc_schedule_timer(&nsvc->timer, seconds, 0); -} - -static void gprs_ns_timer_cb(void *data) -{ - struct gprs_nsvc *nsvc = data; - enum ns_timeout tout = timer_mode_tout[nsvc->timer_mode]; - unsigned int seconds = nsvc->nsi->timeout[tout]; - - log_set_context(BSC_CTX_NSVC, nsvc); - DEBUGP(DNS, "NSEI=%u Timer expired in mode %s (%u seconds)\n", - nsvc->nsei, get_value_string(timer_mode_strs, nsvc->timer_mode), - seconds); - - switch (nsvc->timer_mode) { - case NSVC_TIMER_TNS_ALIVE: - /* Tns-alive case: we expired without response ! */ - nsvc->alive_retries++; - if (nsvc->alive_retries > - nsvc->nsi->timeout[NS_TOUT_TNS_ALIVE_RETRIES]) { - /* mark as dead and blocked */ - nsvc->state = NSE_S_BLOCKED; - rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_BLOCKED]); - rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_DEAD]); - LOGP(DNS, LOGL_NOTICE, - "NSEI=%u Tns-alive expired more then " - "%u times, blocking NS-VC\n", nsvc->nsei, - nsvc->nsi->timeout[NS_TOUT_TNS_ALIVE_RETRIES]); - ns_dispatch_signal(nsvc, S_NS_ALIVE_EXP, 0); - ns_dispatch_signal(nsvc, S_NS_BLOCK, NS_CAUSE_NSVC_BLOCKED); - return; - } - /* Tns-test case: send NS-ALIVE PDU */ - gprs_ns_tx_alive(nsvc); - /* start Tns-alive timer */ - nsvc_start_timer(nsvc, NSVC_TIMER_TNS_ALIVE); - break; - case NSVC_TIMER_TNS_TEST: - /* Tns-test case: send NS-ALIVE PDU */ - gprs_ns_tx_alive(nsvc); - /* start Tns-alive timer (transition into faster - * alive retransmissions) */ - nsvc->alive_retries = 0; - nsvc_start_timer(nsvc, NSVC_TIMER_TNS_ALIVE); - break; - case NSVC_TIMER_TNS_RESET: - /* Chapter 7.3: Re-send the RESET */ - gprs_ns_tx_reset(nsvc, NS_CAUSE_OM_INTERVENTION); - /* Re-start Tns-reset timer */ - nsvc_start_timer(nsvc, NSVC_TIMER_TNS_RESET); - break; - case _NSVC_TIMER_NR: - break; - } -} - -/* Section 9.2.6 */ -static int gprs_ns_tx_reset_ack(struct gprs_nsvc *nsvc) -{ - struct msgb *msg = gprs_ns_msgb_alloc(); - struct gprs_ns_hdr *nsh; - uint16_t nsvci, nsei; - - log_set_context(BSC_CTX_NSVC, nsvc); - if (!msg) - return -ENOMEM; - - nsvci = htons(nsvc->nsvci); - nsei = htons(nsvc->nsei); - - msg->l2h = msgb_put(msg, sizeof(*nsh)); - nsh = (struct gprs_ns_hdr *) msg->l2h; - - nsh->pdu_type = NS_PDUT_RESET_ACK; - - LOGP(DNS, LOGL_INFO, "NSEI=%u Tx NS RESET ACK (NSVCI=%u)\n", - nsvc->nsei, nsvc->nsvci); - - msgb_tvlv_put(msg, NS_IE_VCI, 2, (uint8_t *)&nsvci); - msgb_tvlv_put(msg, NS_IE_NSEI, 2, (uint8_t *)&nsei); - - return gprs_ns_tx(nsvc, msg); -} - -/* Section 9.2.10: transmit side / NS-UNITDATA-REQUEST primitive */ -int gprs_ns_sendmsg(struct gprs_ns_inst *nsi, struct msgb *msg) -{ - struct gprs_nsvc *nsvc; - struct gprs_ns_hdr *nsh; - uint16_t bvci = msgb_bvci(msg); - - nsvc = nsvc_by_nsei(nsi, msgb_nsei(msg)); - if (!nsvc) { - LOGP(DNS, LOGL_ERROR, "Unable to resolve NSEI %u " - "to NS-VC!\n", msgb_nsei(msg)); - msgb_free(msg); - return -EINVAL; - } - log_set_context(BSC_CTX_NSVC, nsvc); - - if (!(nsvc->state & NSE_S_ALIVE)) { - LOGP(DNS, LOGL_ERROR, "NSEI=%u is not alive, cannot send\n", - nsvc->nsei); - msgb_free(msg); - return -EBUSY; - } - if (nsvc->state & NSE_S_BLOCKED) { - LOGP(DNS, LOGL_ERROR, "NSEI=%u is blocked, cannot send\n", - nsvc->nsei); - msgb_free(msg); - return -EBUSY; - } - - msg->l2h = msgb_push(msg, sizeof(*nsh) + 3); - nsh = (struct gprs_ns_hdr *) msg->l2h; - if (!nsh) { - LOGP(DNS, LOGL_ERROR, "Not enough headroom for NS header\n"); - msgb_free(msg); - return -EIO; - } - - nsh->pdu_type = NS_PDUT_UNITDATA; - /* spare octet in data[0] */ - nsh->data[1] = bvci >> 8; - nsh->data[2] = bvci & 0xff; - - return gprs_ns_tx(nsvc, msg); -} - -/* Section 9.2.10: receive side */ -static int gprs_ns_rx_unitdata(struct gprs_nsvc *nsvc, struct msgb *msg) -{ - struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *)msg->l2h; - uint16_t bvci; - - if (nsvc->state & NSE_S_BLOCKED) - return gprs_ns_tx_status(nsvc, NS_CAUSE_NSVC_BLOCKED, - 0, msg); - - /* spare octet in data[0] */ - bvci = nsh->data[1] << 8 | nsh->data[2]; - msgb_bssgph(msg) = &nsh->data[3]; - msgb_bvci(msg) = bvci; - - /* call upper layer (BSSGP) */ - return nsvc->nsi->cb(GPRS_NS_EVT_UNIT_DATA, nsvc, msg, bvci); -} - -/* Section 9.2.7 */ -static int gprs_ns_rx_status(struct gprs_nsvc *nsvc, struct msgb *msg) -{ - struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h; - struct tlv_parsed tp; - uint8_t cause; - int rc; - - LOGP(DNS, LOGL_NOTICE, "NSEI=%u Rx NS STATUS ", nsvc->nsei); - - rc = tlv_parse(&tp, &ns_att_tlvdef, nsh->data, - msgb_l2len(msg) - sizeof(*nsh), 0, 0); - if (rc < 0) { - LOGPC(DNS, LOGL_NOTICE, "Error during TLV Parse\n"); - LOGP(DNS, LOGL_ERROR, "NSEI=%u Rx NS STATUS: " - "Error during TLV Parse\n", nsvc->nsei); - return rc; - } - - if (!TLVP_PRESENT(&tp, NS_IE_CAUSE)) { - LOGPC(DNS, LOGL_INFO, "missing cause IE\n"); - return -EINVAL; - } - - cause = *TLVP_VAL(&tp, NS_IE_CAUSE); - LOGPC(DNS, LOGL_NOTICE, "cause=%s\n", gprs_ns_cause_str(cause)); - - return 0; -} - -/* Section 7.3 */ -static int gprs_ns_rx_reset(struct gprs_nsvc *nsvc, struct msgb *msg) -{ - struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h; - struct tlv_parsed tp; - uint8_t *cause; - uint16_t *nsvci, *nsei; - int rc; - - rc = tlv_parse(&tp, &ns_att_tlvdef, nsh->data, - msgb_l2len(msg) - sizeof(*nsh), 0, 0); - if (rc < 0) { - LOGP(DNS, LOGL_ERROR, "NSEI=%u Rx NS RESET " - "Error during TLV Parse\n", nsvc->nsei); - return rc; - } - - if (!TLVP_PRESENT(&tp, NS_IE_CAUSE) || - !TLVP_PRESENT(&tp, NS_IE_VCI) || - !TLVP_PRESENT(&tp, NS_IE_NSEI)) { - LOGP(DNS, LOGL_ERROR, "NS RESET Missing mandatory IE\n"); - gprs_ns_tx_status(nsvc, NS_CAUSE_MISSING_ESSENT_IE, 0, msg); - return -EINVAL; - } - - cause = (uint8_t *) TLVP_VAL(&tp, NS_IE_CAUSE); - nsvci = (uint16_t *) TLVP_VAL(&tp, NS_IE_VCI); - nsei = (uint16_t *) TLVP_VAL(&tp, NS_IE_NSEI); - - LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS RESET (NSVCI=%u, cause=%s)\n", - nsvc->nsvci, nsvc->nsei, gprs_ns_cause_str(*cause)); - - /* Mark NS-VC as blocked and alive */ - nsvc->state = NSE_S_BLOCKED | NSE_S_ALIVE; - - nsvc->nsei = ntohs(*nsei); - nsvc->nsvci = ntohs(*nsvci); - - /* start the test procedure */ - gprs_ns_tx_simple(nsvc, NS_PDUT_ALIVE); - nsvc_start_timer(nsvc, NSVC_TIMER_TNS_TEST); - - /* inform interested parties about the fact that this NSVC - * has received RESET */ - ns_dispatch_signal(nsvc, S_NS_RESET, *cause); - - return gprs_ns_tx_reset_ack(nsvc); -} - -static int gprs_ns_rx_block(struct gprs_nsvc *nsvc, struct msgb *msg) -{ - struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h; - struct tlv_parsed tp; - uint8_t *cause; - int rc; - - LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS BLOCK\n", nsvc->nsei); - - nsvc->state |= NSE_S_BLOCKED; - - rc = tlv_parse(&tp, &ns_att_tlvdef, nsh->data, - msgb_l2len(msg) - sizeof(*nsh), 0, 0); - if (rc < 0) { - LOGP(DNS, LOGL_ERROR, "NSEI=%u Rx NS BLOCK " - "Error during TLV Parse\n", nsvc->nsei); - return rc; - } - - if (!TLVP_PRESENT(&tp, NS_IE_CAUSE) || - !TLVP_PRESENT(&tp, NS_IE_VCI)) { - LOGP(DNS, LOGL_ERROR, "NS RESET Missing mandatory IE\n"); - gprs_ns_tx_status(nsvc, NS_CAUSE_MISSING_ESSENT_IE, 0, msg); - return -EINVAL; - } - - cause = (uint8_t *) TLVP_VAL(&tp, NS_IE_CAUSE); - //nsvci = (uint16_t *) TLVP_VAL(&tp, NS_IE_VCI); - - ns_dispatch_signal(nsvc, S_NS_BLOCK, *cause); - rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_BLOCKED]); - - return gprs_ns_tx_simple(nsvc, NS_PDUT_BLOCK_ACK); -} - -/* main entry point, here incoming NS frames enter */ -int gprs_ns_rcvmsg(struct gprs_ns_inst *nsi, struct msgb *msg, - struct sockaddr_in *saddr, enum gprs_ns_ll ll) -{ - struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h; - struct gprs_nsvc *nsvc; - int rc = 0; - - /* look up the NSVC based on source address */ - nsvc = nsvc_by_rem_addr(nsi, saddr); - if (!nsvc) { - struct tlv_parsed tp; - uint16_t nsei; - if (nsh->pdu_type == NS_PDUT_STATUS) { - LOGP(DNS, LOGL_INFO, "Ignoring NS STATUS from %s:%u " - "for non-existing NS-VC\n", - inet_ntoa(saddr->sin_addr), ntohs(saddr->sin_port)); - return 0; - } - /* Only the RESET procedure creates a new NSVC */ - if (nsh->pdu_type != NS_PDUT_RESET) { - /* Since we have no NSVC, we have to use a fake */ - nsvc = nsi->unknown_nsvc; - log_set_context(BSC_CTX_NSVC, nsvc); - LOGP(DNS, LOGL_INFO, "Rejecting NS PDU type 0x%0x " - "from %s:%u for non-existing NS-VC\n", - nsh->pdu_type, inet_ntoa(saddr->sin_addr), - ntohs(saddr->sin_port)); - nsvc->nsvci = nsvc->nsei = 0xfffe; - nsvc->ip.bts_addr = *saddr; - nsvc->state = NSE_S_ALIVE; - nsvc->ll = ll; -#if 0 - return gprs_ns_tx_reset(nsvc, NS_CAUSE_PDU_INCOMP_PSTATE); -#else - return gprs_ns_tx_status(nsvc, - NS_CAUSE_PDU_INCOMP_PSTATE, 0, - msg); -#endif - } - rc = tlv_parse(&tp, &ns_att_tlvdef, nsh->data, - msgb_l2len(msg) - sizeof(*nsh), 0, 0); - if (rc < 0) { - LOGP(DNS, LOGL_ERROR, "Rx NS RESET Error %d during " - "TLV Parse\n", rc); - return rc; - } - if (!TLVP_PRESENT(&tp, NS_IE_CAUSE) || - !TLVP_PRESENT(&tp, NS_IE_VCI) || - !TLVP_PRESENT(&tp, NS_IE_NSEI)) { - LOGP(DNS, LOGL_ERROR, "NS RESET Missing mandatory IE\n"); - gprs_ns_tx_status(nsvc, NS_CAUSE_MISSING_ESSENT_IE, 0, - msg); - return -EINVAL; - } - nsei = ntohs(*(uint16_t *)TLVP_VAL(&tp, NS_IE_NSEI)); - /* Check if we already know this NSEI, the remote end might - * simply have changed addresses, or it is a SGSN */ - nsvc = nsvc_by_nsei(nsi, nsei); - if (!nsvc) { - nsvc = nsvc_create(nsi, 0xffff); - nsvc->ll = ll; - log_set_context(BSC_CTX_NSVC, nsvc); - LOGP(DNS, LOGL_INFO, "Creating NS-VC for BSS at %s:%u\n", - inet_ntoa(saddr->sin_addr), ntohs(saddr->sin_port)); - } - /* Update the remote peer IP address/port */ - nsvc->ip.bts_addr = *saddr; - } else - msgb_nsei(msg) = nsvc->nsei; - - log_set_context(BSC_CTX_NSVC, nsvc); - - /* Increment number of Incoming bytes */ - rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_PKTS_IN]); - rate_ctr_add(&nsvc->ctrg->ctr[NS_CTR_BYTES_IN], msgb_l2len(msg)); - - switch (nsh->pdu_type) { - case NS_PDUT_ALIVE: - /* If we're dead and blocked and suddenly receive a - * NS-ALIVE out of the blue, we might have been re-started - * and should send a NS-RESET to make sure everything recovers - * fine. */ - if (nsvc->state == NSE_S_BLOCKED) - rc = gprs_ns_tx_reset(nsvc, NS_CAUSE_PDU_INCOMP_PSTATE); - else - rc = gprs_ns_tx_alive_ack(nsvc); - break; - case NS_PDUT_ALIVE_ACK: - /* stop Tns-alive and start Tns-test */ - nsvc_start_timer(nsvc, NSVC_TIMER_TNS_TEST); - if (nsvc->remote_end_is_sgsn) { - /* FIXME: this should be one level higher */ - if (nsvc->state & NSE_S_BLOCKED) - rc = gprs_ns_tx_unblock(nsvc); - } - break; - case NS_PDUT_UNITDATA: - /* actual user data */ - rc = gprs_ns_rx_unitdata(nsvc, msg); - break; - case NS_PDUT_STATUS: - rc = gprs_ns_rx_status(nsvc, msg); - break; - case NS_PDUT_RESET: - rc = gprs_ns_rx_reset(nsvc, msg); - break; - case NS_PDUT_RESET_ACK: - LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS RESET ACK\n", nsvc->nsei); - /* mark NS-VC as blocked + active */ - nsvc->state = NSE_S_BLOCKED | NSE_S_ALIVE; - nsvc->remote_state = NSE_S_BLOCKED | NSE_S_ALIVE; - rate_ctr_inc(&nsvc->ctrg->ctr[NS_CTR_BLOCKED]); - if (nsvc->persistent || nsvc->remote_end_is_sgsn) { - /* stop RESET timer */ - bsc_del_timer(&nsvc->timer); - } - /* Initiate TEST proc.: Send ALIVE and start timer */ - rc = gprs_ns_tx_simple(nsvc, NS_PDUT_ALIVE); - nsvc_start_timer(nsvc, NSVC_TIMER_TNS_TEST); - break; - case NS_PDUT_UNBLOCK: - /* Section 7.2: unblocking procedure */ - LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS UNBLOCK\n", nsvc->nsei); - nsvc->state &= ~NSE_S_BLOCKED; - ns_dispatch_signal(nsvc, S_NS_UNBLOCK, 0); - rc = gprs_ns_tx_simple(nsvc, NS_PDUT_UNBLOCK_ACK); - break; - case NS_PDUT_UNBLOCK_ACK: - LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS UNBLOCK ACK\n", nsvc->nsei); - /* mark NS-VC as unblocked + active */ - nsvc->state = NSE_S_ALIVE; - nsvc->remote_state = NSE_S_ALIVE; - ns_dispatch_signal(nsvc, S_NS_UNBLOCK, 0); - break; - case NS_PDUT_BLOCK: - rc = gprs_ns_rx_block(nsvc, msg); - break; - case NS_PDUT_BLOCK_ACK: - LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS BLOCK ACK\n", nsvc->nsei); - /* mark remote NS-VC as blocked + active */ - nsvc->remote_state = NSE_S_BLOCKED | NSE_S_ALIVE; - break; - default: - LOGP(DNS, LOGL_NOTICE, "NSEI=%u Rx Unknown NS PDU type 0x%02x\n", - nsvc->nsei, nsh->pdu_type); - rc = -EINVAL; - break; - } - return rc; -} - -struct gprs_ns_inst *gprs_ns_instantiate(gprs_ns_cb_t *cb) -{ - struct gprs_ns_inst *nsi = talloc_zero(tall_bsc_ctx, struct gprs_ns_inst); - - nsi->cb = cb; - INIT_LLIST_HEAD(&nsi->gprs_nsvcs); - nsi->timeout[NS_TOUT_TNS_BLOCK] = 3; - nsi->timeout[NS_TOUT_TNS_BLOCK_RETRIES] = 3; - nsi->timeout[NS_TOUT_TNS_RESET] = 3; - nsi->timeout[NS_TOUT_TNS_RESET_RETRIES] = 3; - nsi->timeout[NS_TOUT_TNS_TEST] = 30; - nsi->timeout[NS_TOUT_TNS_ALIVE] = 3; - nsi->timeout[NS_TOUT_TNS_ALIVE_RETRIES] = 10; - - /* Create the dummy NSVC that we use for sending - * messages to non-existant/unknown NS-VC's */ - nsi->unknown_nsvc = nsvc_create(nsi, 0xfffe); - llist_del(&nsi->unknown_nsvc->list); - - return nsi; -} - -void gprs_ns_destroy(struct gprs_ns_inst *nsi) -{ - /* FIXME: clear all timers */ - - /* recursively free the NSI and all its NSVCs */ - talloc_free(nsi); -} - - -/* NS-over-IP code, according to 3GPP TS 48.016 Chapter 6.2 - * We don't support Size Procedure, Configuration Procedure, ChangeWeight Procedure */ - -/* Read a single NS-over-IP message */ -static struct msgb *read_nsip_msg(struct bsc_fd *bfd, int *error, - struct sockaddr_in *saddr) -{ - struct msgb *msg = gprs_ns_msgb_alloc(); - int ret = 0; - socklen_t saddr_len = sizeof(*saddr); - - if (!msg) { - *error = -ENOMEM; - return NULL; - } - - ret = recvfrom(bfd->fd, msg->data, NS_ALLOC_SIZE - NS_ALLOC_HEADROOM, 0, - (struct sockaddr *)saddr, &saddr_len); - if (ret < 0) { - LOGP(DNS, LOGL_ERROR, "recv error %s during NSIP recv\n", - strerror(errno)); - msgb_free(msg); - *error = ret; - return NULL; - } else if (ret == 0) { - msgb_free(msg); - *error = ret; - return NULL; - } - - msg->l2h = msg->data; - msgb_put(msg, ret); - - return msg; -} - -static int handle_nsip_read(struct bsc_fd *bfd) -{ - int error; - struct sockaddr_in saddr; - struct gprs_ns_inst *nsi = bfd->data; - struct msgb *msg = read_nsip_msg(bfd, &error, &saddr); - - if (!msg) - return error; - - error = gprs_ns_rcvmsg(nsi, msg,