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-rw-r--r--openbsc/include/openbsc/gprs_bssgp.h232
-rw-r--r--openbsc/include/openbsc/gprs_ns.h232
-rw-r--r--openbsc/include/openbsc/gprs_ns_frgre.h6
-rw-r--r--openbsc/src/gprs/gprs_bssgp.c852
-rw-r--r--openbsc/src/gprs/gprs_bssgp_util.c120
-rw-r--r--openbsc/src/gprs/gprs_bssgp_vty.c178
-rw-r--r--openbsc/src/gprs/gprs_ns.c989
-rw-r--r--openbsc/src/gprs/gprs_ns_frgre.c305
-rw-r--r--openbsc/src/gprs/gprs_ns_vty.c571
9 files changed, 3485 insertions, 0 deletions
diff --git a/openbsc/include/openbsc/gprs_bssgp.h b/openbsc/include/openbsc/gprs_bssgp.h
new file mode 100644
index 00000000..e432cf75
--- /dev/null
+++ b/openbsc/include/openbsc/gprs_bssgp.h
@@ -0,0 +1,232 @@
+#ifndef _GPRS_BSSGP_H
+#define _GPRS_BSSGP_H
+
+#include <stdint.h>
+
+/* Section 5.4.1 */
+#define BVCI_SIGNALLING 0x0000
+#define BVCI_PTM 0x0001
+
+/* Section 11.3.26 / Table 11.27 */
+enum bssgp_pdu_type {
+ /* PDUs between RL and BSSGP SAPs */
+ BSSGP_PDUT_DL_UNITDATA = 0x00,
+ BSSGP_PDUT_UL_UNITDATA = 0x01,
+ BSSGP_PDUT_RA_CAPABILITY = 0x02,
+ BSSGP_PDUT_PTM_UNITDATA = 0x03,
+ /* PDUs between GMM SAPs */
+ BSSGP_PDUT_PAGING_PS = 0x06,
+ BSSGP_PDUT_PAGING_CS = 0x07,
+ BSSGP_PDUT_RA_CAPA_UDPATE = 0x08,
+ BSSGP_PDUT_RA_CAPA_UPDATE_ACK = 0x09,
+ BSSGP_PDUT_RADIO_STATUS = 0x0a,
+ BSSGP_PDUT_SUSPEND = 0x0b,
+ BSSGP_PDUT_SUSPEND_ACK = 0x0c,
+ BSSGP_PDUT_SUSPEND_NACK = 0x0d,
+ BSSGP_PDUT_RESUME = 0x0e,
+ BSSGP_PDUT_RESUME_ACK = 0x0f,
+ BSSGP_PDUT_RESUME_NACK = 0x10,
+ /* PDus between NM SAPs */
+ BSSGP_PDUT_BVC_BLOCK = 0x20,
+ BSSGP_PDUT_BVC_BLOCK_ACK = 0x21,
+ BSSGP_PDUT_BVC_RESET = 0x22,
+ BSSGP_PDUT_BVC_RESET_ACK = 0x23,
+ BSSGP_PDUT_BVC_UNBLOCK = 0x24,
+ BSSGP_PDUT_BVC_UNBLOCK_ACK = 0x25,
+ BSSGP_PDUT_FLOW_CONTROL_BVC = 0x26,
+ BSSGP_PDUT_FLOW_CONTROL_BVC_ACK = 0x27,
+ BSSGP_PDUT_FLOW_CONTROL_MS = 0x28,
+ BSSGP_PDUT_FLOW_CONTROL_MS_ACK = 0x29,
+ BSSGP_PDUT_FLUSH_LL = 0x2a,
+ BSSGP_PDUT_FLUSH_LL_ACK = 0x2b,
+ BSSGP_PDUT_LLC_DISCARD = 0x2c,
+ BSSGP_PDUT_SGSN_INVOKE_TRACE = 0x40,
+ BSSGP_PDUT_STATUS = 0x41,
+ /* PDUs between PFM SAP's */
+ BSSGP_PDUT_DOWNLOAD_BSS_PFC = 0x50,
+ BSSGP_PDUT_CREATE_BSS_PFC = 0x51,
+ BSSGP_PDUT_CREATE_BSS_PFC_ACK = 0x52,
+ BSSGP_PDUT_CREATE_BSS_PFC_NACK = 0x53,
+ BSSGP_PDUT_MODIFY_BSS_PFC = 0x54,
+ BSSGP_PDUT_MODIFY_BSS_PFC_ACK = 0x55,
+ BSSGP_PDUT_DELETE_BSS_PFC = 0x56,
+ BSSGP_PDUT_DELETE_BSS_PFC_ACK = 0x57,
+};
+
+/* Section 10.2.1 and 10.2.2 */
+struct bssgp_ud_hdr {
+ uint8_t pdu_type;
+ uint32_t tlli;
+ uint8_t qos_profile[3];
+ uint8_t data[0]; /* TLV's */
+} __attribute__((packed));
+
+struct bssgp_normal_hdr {
+ uint8_t pdu_type;
+ uint8_t data[0]; /* TLV's */
+};
+
+enum bssgp_iei_type {
+ BSSGP_IE_ALIGNMENT = 0x00,
+ BSSGP_IE_BMAX_DEFAULT_MS = 0x01,
+ BSSGP_IE_BSS_AREA_ID = 0x02,
+ BSSGP_IE_BUCKET_LEAK_RATE = 0x03,
+ BSSGP_IE_BVCI = 0x04,
+ BSSGP_IE_BVC_BUCKET_SIZE = 0x05,
+ BSSGP_IE_BVC_MEASUREMENT = 0x06,
+ BSSGP_IE_CAUSE = 0x07,
+ BSSGP_IE_CELL_ID = 0x08,
+ BSSGP_IE_CHAN_NEEDED = 0x09,
+ BSSGP_IE_DRX_PARAMS = 0x0a,
+ BSSGP_IE_EMLPP_PRIO = 0x0b,
+ BSSGP_IE_FLUSH_ACTION = 0x0c,
+ BSSGP_IE_IMSI = 0x0d,
+ BSSGP_IE_LLC_PDU = 0x0e,
+ BSSGP_IE_LLC_FRAMES_DISCARDED = 0x0f,
+ BSSGP_IE_LOCATION_AREA = 0x10,
+ BSSGP_IE_MOBILE_ID = 0x11,
+ BSSGP_IE_MS_BUCKET_SIZE = 0x12,
+ BSSGP_IE_MS_RADIO_ACCESS_CAP = 0x13,
+ BSSGP_IE_OMC_ID = 0x14,
+ BSSGP_IE_PDU_IN_ERROR = 0x15,
+ BSSGP_IE_PDU_LIFETIME = 0x16,
+ BSSGP_IE_PRIORITY = 0x17,
+ BSSGP_IE_QOS_PROFILE = 0x18,
+ BSSGP_IE_RADIO_CAUSE = 0x19,
+ BSSGP_IE_RA_CAP_UPD_CAUSE = 0x1a,
+ BSSGP_IE_ROUTEING_AREA = 0x1b,
+ BSSGP_IE_R_DEFAULT_MS = 0x1c,
+ BSSGP_IE_SUSPEND_REF_NR = 0x1d,
+ BSSGP_IE_TAG = 0x1e,
+ BSSGP_IE_TLLI = 0x1f,
+ BSSGP_IE_TMSI = 0x20,
+ BSSGP_IE_TRACE_REFERENC = 0x21,
+ BSSGP_IE_TRACE_TYPE = 0x22,
+ BSSGP_IE_TRANSACTION_ID = 0x23,
+ BSSGP_IE_TRIGGER_ID = 0x24,
+ BSSGP_IE_NUM_OCT_AFF = 0x25,
+ BSSGP_IE_LSA_ID_LIST = 0x26,
+ BSSGP_IE_LSA_INFORMATION = 0x27,
+ BSSGP_IE_PACKET_FLOW_ID = 0x28,
+ BSSGP_IE_PACKET_FLOW_TIMER = 0x29,
+ BSSGP_IE_AGG_BSS_QOS_PROFILE = 0x3a,
+ BSSGP_IE_FEATURE_BITMAP = 0x3b,
+ BSSGP_IE_BUCKET_FULL_RATIO = 0x3c,
+ BSSGP_IE_SERVICE_UTRAN_CCO = 0x3d,
+};
+
+/* Section 11.3.8 / Table 11.10: Cause coding */
+enum gprs_bssgp_cause {
+ BSSGP_CAUSE_PROC_OVERLOAD = 0x00,
+ BSSGP_CAUSE_EQUIP_FAIL = 0x01,
+ BSSGP_CAUSE_TRASIT_NET_FAIL = 0x02,
+ BSSGP_CAUSE_CAPA_GREATER_0KPBS = 0x03,
+ BSSGP_CAUSE_UNKNOWN_MS = 0x04,
+ BSSGP_CAUSE_UNKNOWN_BVCI = 0x05,
+ BSSGP_CAUSE_CELL_TRAF_CONG = 0x06,
+ BSSGP_CAUSE_SGSN_CONG = 0x07,
+ BSSGP_CAUSE_OML_INTERV = 0x08,
+ BSSGP_CAUSE_BVCI_BLOCKED = 0x09,
+ BSSGP_CAUSE_PFC_CREATE_FAIL = 0x0a,
+ BSSGP_CAUSE_SEM_INCORR_PDU = 0x20,
+ BSSGP_CAUSE_INV_MAND_INF = 0x21,
+ BSSGP_CAUSE_MISSING_MAND_IE = 0x22,
+ BSSGP_CAUSE_MISSING_COND_IE = 0x23,
+ BSSGP_CAUSE_UNEXP_COND_IE = 0x24,
+ BSSGP_CAUSE_COND_IE_ERR = 0x25,
+ BSSGP_CAUSE_PDU_INCOMP_STATE = 0x26,
+ BSSGP_CAUSE_PROTO_ERR_UNSPEC = 0x27,
+ BSSGP_CAUSE_PDU_INCOMP_FEAT = 0x28,
+};
+
+/* 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 */
+
+#define BVC_S_BLOCKED 0x0001
+
+/* The per-BTS context that we keep on the SGSN side of the BSSGP link */
+struct bssgp_bvc_ctx {
+ struct llist_head list;
+
+ /* parsed RA ID and Cell ID of the remote BTS */
+ struct gprs_ra_id ra_id;
+ uint16_t cell_id;
+
+ /* NSEI and BVCI of underlying Gb link. Together they
+ * uniquely identify a link to a BTS (5.4.4) */
+ uint16_t bvci;
+ uint16_t nsei;
+
+ uint32_t state;
+
+ struct rate_ctr_group *ctrg;
+
+ /* we might want to add this as a shortcut later, avoiding the NSVC
+ * lookup for every packet, similar to a routing cache */
+ //struct gprs_nsvc *nsvc;
+};
+extern struct 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);
+/* Find a BTS context based on BVCI+NSEI tuple */
+struct bssgp_bvc_ctx *btsctx_by_bvci_nsei(uint16_t bvci, uint16_t nsei);
+
+#include <osmocore/tlv.h>
+
+/* BSSGP-UL-UNITDATA.ind */
+int gprs_bssgp_rcvmsg(struct msgb *msg);
+
+/* BSSGP-DL-UNITDATA.req */
+struct sgsn_mm_ctx;
+int gprs_bssgp_tx_dl_ud(struct msgb *msg, struct sgsn_mm_ctx *mmctx);
+
+uint16_t bssgp_parse_cell_id(struct gprs_ra_id *raid, const uint8_t *buf);
+
+/* Wrapper around TLV parser to parse BSSGP IEs */
+static inline int bssgp_tlv_parse(struct tlv_parsed *tp, uint8_t *buf, int len)
+{
+ return tlv_parse(tp, &tvlv_att_def, buf, len, 0, 0);
+}
+
+enum bssgp_paging_mode {
+ BSSGP_PAGING_PS,
+ BSSGP_PAGING_CS,
+};
+
+enum bssgp_paging_scope {
+ BSSGP_PAGING_BSS_AREA, /* all cells in BSS */
+ BSSGP_PAGING_LOCATION_AREA, /* all cells in LA */
+ BSSGP_PAGING_ROUTEING_AREA, /* all cells in RA */
+ BSSGP_PAGING_BVCI, /* one cell */
+};
+
+struct bssgp_paging_info {
+ enum bssgp_paging_mode mode;
+ enum bssgp_paging_scope scope;
+ struct gprs_ra_id raid;
+ uint16_t bvci;
+ const char *imsi;
+ uint32_t *ptmsi;
+ uint16_t drx_params;
+ uint8_t qos[3];
+};
+
+/* 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);
+
+/* gprs_bssgp_vty.c */
+int gprs_bssgp_vty_init(void);
+
+#endif /* _GPRS_BSSGP_H */
diff --git a/openbsc/include/openbsc/gprs_ns.h b/openbsc/include/openbsc/gprs_ns.h
new file mode 100644
index 00000000..953c364b
--- /dev/null
+++ b/openbsc/include/openbsc/gprs_ns.h
@@ -0,0 +1,232 @@
+#ifndef _GPRS_NS_H
+#define _GPRS_NS_H
+
+#include <stdint.h>
+
+/* GPRS Networks Service (NS) messages on the Gb interface
+ * 3GPP TS 08.16 version 8.0.1 Release 1999 / ETSI TS 101 299 V8.0.1 (2002-05)
+ * 3GPP TS 48.016 version 6.5.0 Release 6 / ETSI TS 148 016 V6.5.0 (2005-11) */
+
+struct gprs_ns_hdr {
+ uint8_t pdu_type;
+ uint8_t data[0];
+} __attribute__((packed));
+
+/* TS 08.16, Section 10.3.7, Table 14 */
+enum ns_pdu_type {
+ NS_PDUT_UNITDATA = 0x00,
+ NS_PDUT_RESET = 0x02,
+ NS_PDUT_RESET_ACK = 0x03,
+ NS_PDUT_BLOCK = 0x04,
+ NS_PDUT_BLOCK_ACK = 0x05,
+ NS_PDUT_UNBLOCK = 0x06,
+ NS_PDUT_UNBLOCK_ACK = 0x07,
+ NS_PDUT_STATUS = 0x08,
+ NS_PDUT_ALIVE = 0x0a,
+ NS_PDUT_ALIVE_ACK = 0x0b,
+ /* TS 48.016 Section 10.3.7, Table 10.3.7.1 */
+ SNS_PDUT_ACK = 0x0c,
+ SNS_PDUT_ADD = 0x0d,
+ SNS_PDUT_CHANGE_WEIGHT = 0x0e,
+ SNS_PDUT_CONFIG = 0x0f,
+ SNS_PDUT_CONFIG_ACK = 0x10,
+ SNS_PDUT_DELETE = 0x11,
+ SNS_PDUT_SIZE = 0x12,
+ SNS_PDUT_SIZE_ACK = 0x13,
+};
+
+/* TS 08.16, Section 10.3, Table 12 */
+enum ns_ctrl_ie {
+ NS_IE_CAUSE = 0x00,
+ NS_IE_VCI = 0x01,
+ NS_IE_PDU = 0x02,
+ NS_IE_BVCI = 0x03,
+ NS_IE_NSEI = 0x04,
+ /* TS 48.016 Section 10.3, Table 10.3.1 */
+ NS_IE_IPv4_LIST = 0x05,
+ NS_IE_IPv6_LIST = 0x06,
+ NS_IE_MAX_NR_NSVC = 0x07,
+ NS_IE_IPv4_EP_NR = 0x08,
+ NS_IE_IPv6_EP_NR = 0x09,
+ NS_IE_RESET_FLAG = 0x0a,
+ NS_IE_IP_ADDR = 0x0b,
+};
+
+/* TS 08.16, Section 10.3.2, Table 13 */
+enum ns_cause {
+ NS_CAUSE_TRANSIT_FAIL = 0x00,
+ NS_CAUSE_OM_INTERVENTION = 0x01,
+ NS_CAUSE_EQUIP_FAIL = 0x02,
+ NS_CAUSE_NSVC_BLOCKED = 0x03,
+ NS_CAUSE_NSVC_UNKNOWN = 0x04,
+ NS_CAUSE_BVCI_UNKNOWN = 0x05,
+ NS_CAUSE_SEM_INCORR_PDU = 0x08,
+ NS_CAUSE_PDU_INCOMP_PSTATE = 0x0a,
+ NS_CAUSE_PROTO_ERR_UNSPEC = 0x0b,
+ NS_CAUSE_INVAL_ESSENT_IE = 0x0c,
+ NS_CAUSE_MISSING_ESSENT_IE = 0x0d,
+ /* TS 48.016 Section 10.3.2, Table 10.3.2.1 */
+ NS_CAUSE_INVAL_NR_IPv4_EP = 0x0e,
+ NS_CAUSE_INVAL_NR_IPv6_EP = 0x0f,
+ NS_CAUSE_INVAL_NR_NS_VC = 0x10,
+ NS_CAUSE_INVAL_WEIGH = 0x11,
+ NS_CAUSE_UNKN_IP_EP = 0x12,
+ NS_CAUSE_UNKN_IP_ADDR = 0x13,
+ NS_CAUSE_UNKN_IP_TEST_FAILED = 0x14,
+};
+
+/* Our Implementation */
+#include <netinet/in.h>
+#include <osmocore/linuxlist.h>
+#include <osmocore/msgb.h>
+#include <osmocore/timer.h>
+#include <osmocore/select.h>
+
+#define NS_TIMERS_COUNT 7
+#define NS_TIMERS "(tns-block|tns-block-retries|tns-reset|tns-reset-retries|tns-test|tns-alive|tns-alive-retries)"
+#define NS_TIMERS_HELP \
+ "(un)blocking Timer (Tns-block) timeout\n" \
+ "(un)blocking Timer (Tns-block) number of retries\n" \
+ "Reset Timer (Tns-reset) timeout\n" \
+ "Reset Timer (Tns-reset) number of retries\n" \
+ "Test Timer (Tns-test) timeout\n" \
+
+enum ns_timeout {
+ NS_TOUT_TNS_BLOCK,
+ NS_TOUT_TNS_BLOCK_RETRIES,
+ NS_TOUT_TNS_RESET,
+ NS_TOUT_TNS_RESET_RETRIES,
+ NS_TOUT_TNS_TEST,
+ NS_TOUT_TNS_ALIVE,
+ NS_TOUT_TNS_ALIVE_RETRIES,
+};
+
+#define NSE_S_BLOCKED 0x0001
+#define NSE_S_ALIVE 0x0002
+
+enum gprs_ns_ll {
+ GPRS_NS_LL_UDP,
+ GPRS_NS_LL_E1,
+ GPRS_NS_LL_FR_GRE,
+};
+
+enum gprs_ns_evt {
+ GPRS_NS_EVT_UNIT_DATA,
+};
+
+struct gprs_nsvc;
+typedef int gprs_ns_cb_t(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
+ struct msgb *msg, uint16_t bvci);
+
+/* An instance of the NS protocol stack */
+struct gprs_ns_inst {
+ /* callback to the user for incoming UNIT DATA IND */
+ gprs_ns_cb_t *cb;
+
+ /* linked lists of all NSVC in this instance */
+ struct llist_head gprs_nsvcs;
+
+ /* a NSVC object that's needed to deal with packets for unknown NSVC */
+ struct gprs_nsvc *unknown_nsvc;
+
+ uint16_t timeout[NS_TIMERS_COUNT];
+
+ /* NS-over-IP specific bits */
+ struct {
+ struct bsc_fd fd;
+ uint32_t local_ip;
+ uint16_t local_port;
+ } nsip;
+ /* NS-over-FR-over-GRE-over-IP specific bits */
+ struct {
+ struct bsc_fd fd;
+ uint32_t local_ip;
+ int enabled:1;
+ } frgre;
+};
+
+enum nsvc_timer_mode {
+ /* standard timers */
+ NSVC_TIMER_TNS_TEST,
+ NSVC_TIMER_TNS_ALIVE,
+ NSVC_TIMER_TNS_RESET,
+ _NSVC_TIMER_NR,
+};
+
+struct gprs_nsvc {
+ struct llist_head list;
+ struct gprs_ns_inst *nsi;
+
+ uint16_t nsei; /* end-to-end significance */
+ uint16_t nsvci; /* uniquely identifies NS-VC at SGSN */
+
+ uint32_t state;
+ uint32_t remote_state;
+
+ struct timer_list timer;
+ enum nsvc_timer_mode timer_mode;
+ int alive_retries;
+
+ unsigned int remote_end_is_sgsn:1;
+ unsigned int persistent:1;
+
+ struct rate_ctr_group *ctrg;
+
+ /* which link-layer are we based on? */
+ enum gprs_ns_ll ll;
+
+ union {
+ struct {
+ struct sockaddr_in bts_addr;
+ } ip;
+ struct {
+ struct sockaddr_in bts_addr;
+ } frgre;
+ };
+};
+
+/* Create a new NS protocol instance */
+struct gprs_ns_inst *gprs_ns_instantiate(gprs_ns_cb_t *cb);
+
+/* Destroy a NS protocol instance */
+void gprs_ns_destroy(struct gprs_ns_inst *nsi);
+
+/* Listen for incoming GPRS packets via NS/UDP */
+int gprs_ns_nsip_listen(struct gprs_ns_inst *nsi);
+
+struct sockaddr_in;
+
+/* main function for higher layers (BSSGP) to send NS messages */
+int gprs_ns_sendmsg(struct gprs_ns_inst *nsi, struct msgb *msg);
+
+int gprs_ns_tx_reset(struct gprs_nsvc *nsvc, uint8_t cause);
+int gprs_ns_tx_block(struct gprs_nsvc *nsvc, uint8_t cause);
+int gprs_ns_tx_unblock(struct gprs_nsvc *nsvc);
+
+/* Listen for incoming GPRS packets via NS/FR/GRE */
+int gprs_ns_frgre_listen(struct gprs_ns_inst *nsi);
+
+/* Establish a connection (from the BSS) to the SGSN */
+struct gprs_nsvc *nsip_connect(struct gprs_ns_inst *nsi,
+ struct sockaddr_in *dest, uint16_t nsei,
+ uint16_t nsvci);
+
+struct gprs_nsvc *nsvc_create(struct gprs_ns_inst *nsi, uint16_t nsvci);
+void nsvc_delete(struct gprs_nsvc *nsvc);
+struct gprs_nsvc *nsvc_by_nsei(struct gprs_ns_inst *nsi, uint16_t nsei);
+struct gprs_nsvc *nsvc_by_nsvci(struct gprs_ns_inst *nsi, uint16_t nsvci);
+
+/* Initiate a RESET procedure (including timer start, ...)*/
+void gprs_nsvc_reset(struct gprs_nsvc *nsvc, uint8_t cause);
+
+/* Add NS-specific VTY stuff */
+int gprs_ns_vty_init(struct gprs_ns_inst *nsi);
+
+#define NS_ALLOC_SIZE 2048
+#define NS_ALLOC_HEADROOM 20
+static inline struct msgb *gprs_ns_msgb_alloc(void)
+{
+ return msgb_alloc_headroom(NS_ALLOC_SIZE, NS_ALLOC_HEADROOM, "GPRS/NS");
+}
+
+#endif
diff --git a/openbsc/include/openbsc/gprs_ns_frgre.h b/openbsc/include/openbsc/gprs_ns_frgre.h
new file mode 100644
index 00000000..abcd43ff
--- /dev/null
+++ b/openbsc/include/openbsc/gprs_ns_frgre.h
@@ -0,0 +1,6 @@
+#ifndef _GPRS_NS_FRGRE_H
+#define _GPRS_NS_FRGRE_H
+
+int gprs_ns_frgre_sendmsg(struct gprs_nsvc *nsvc, struct msgb *msg);
+
+#endif
diff --git a/openbsc/src/gprs/gprs_bssgp.c b/openbsc/src/gprs/gprs_bssgp.c
new file mode 100644
index 00000000..0ec873ca
--- /dev/null
+++ b/openbsc/src/gprs/gprs_bssgp.c
@@ -0,0 +1,852 @@
+/* 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.
+ *
+ * TODO:
+ * o properly count incoming BVC-RESET packets in counter group
+ * o set log context as early as possible for outgoing packets
+ */
+
+#include <errno.h>
+#include <stdint.h>
+
+#include <netinet/in.h>
+
+#include <osmocore/msgb.h>
+#include <osmocore/tlv.h>
+#include <osmocore/talloc.h>
+#include <osmocore/rate_ctr.h>
+
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/gsm_04_08_gprs.h>
+#include <openbsc/gprs_bssgp.h>
+#include <openbsc/gprs_llc.h>
+#include <openbsc/gprs_ns.h>
+#include <openbsc/gprs_sgsn.h>
+#include <openbsc/gprs_gmm.h>
+
+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,
+ 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;
+
+ 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);
+ 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, 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;
+
+ 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);
+ }
+
+ tlli = ntohl(*(uint32_t *)TLVP_VAL(tp, BSSGP_IE_TLLI));
+
+ DEBUGP(DBSSGP, "BSSGP BVCI=%u TLLI=%u 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 */