1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
#ifndef _GPRS_BSSGP_H
#define _GPRS_BSSGP_H
#include <stdint.h>
#include <osmocom/gsm/gsm48.h>
#include <osmocom/gsm/prim.h>
#include <osmocom/gprs/protocol/gsm_08_18.h>
/* 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);
enum bssgp_prim {
PRIM_BSSGP_DL_UD,
PRIM_BSSGP_UL_UD,
PRIM_BSSGP_PTM_UD,
PRIM_BSSGP_GMM_SUSPEND,
PRIM_BSSGP_GMM_RESUME,
PRIM_BSSGP_GMM_PAGING,
PRIM_NM_FLUSH_LL,
PRIM_NM_LLC_DISCARDED,
PRIM_NM_BVC_RESET,
PRIM_NM_BVC_BLOCK,
PRIM_NM_BVC_UNBLOCK,
};
struct osmo_bssgp_prim {
struct osmo_prim_hdr oph;
/* common fields */
uint16_t nsei;
uint16_t bvci;
uint32_t tlli;
struct tlv_parsed *tp;
struct gprs_ra_id *ra_id;
/* specific fields */
union {
struct {
uint8_t *suspend_ref;
} resume;
} u;
};
/* 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;
struct gprs_ra_id ra_id; /*!< parsed RA ID of the remote BTS */
uint16_t cell_id; /*!< Cell ID of the remote BTS */
/* 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);
#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,
};
#include <osmocom/gsm/tlv.h>
#include <osmocom/gprs/gprs_msgb.h>
/* BSSGP-UL-UNITDATA.ind */
int bssgp_rcvmsg(struct msgb *msg);
/* BSSGP-DL-UNITDATA.req */
struct bssgp_lv {
uint16_t len;
uint8_t *v;
};
/* parameters for BSSGP downlink userdata transmission */
struct bssgp_dl_ud_par {
uint32_t *tlli;
char *imsi;
uint16_t drx_parms;
/* FIXME: priority */
struct bssgp_lv ms_ra_cap;
uint8_t qos_profile[3];
};
int bssgp_tx_dl_ud(struct msgb *msg, uint16_t pdu_lifetime,
struct bssgp_dl_ud_par *dup);
uint16_t bssgp_parse_cell_id(struct gprs_ra_id *raid, const uint8_t *buf);
int bssgp_create_cell_id(uint8_t *buf, const struct gprs_ra_id *raid,
uint16_t cid);
/* 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);
}
/*! \brief BSSGP Paging mode */
enum bssgp_paging_mode {
BSSGP_PAGING_PS,
BSSGP_PAGING_CS,
};
/*! \brief BSSGP Paging scope */
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 */
};
/*! \brief BSSGP paging information */
struct bssgp_paging_info {
enum bssgp_paging_mode mode; /*!< CS or PS paging */
enum bssgp_paging_scope scope; /*!< bssgp_paging_scope */
struct gprs_ra_id raid; /*!< RA Identifier */
uint16_t bvci; /*!< BVCI */
char *imsi; /*!< IMSI, if any */
uint32_t *ptmsi; /*!< P-TMSI, if any */
uint16_t drx_params; /*!< DRX parameters */
uint8_t qos[3]; /*!< QoS parameters */
};
/* Send a single GMM-PAGING.req to a given NSEI/NS-BVCI */
int bssgp_tx_paging(uint16_t nsei, uint16_t ns_bvci,
struct bssgp_paging_info *pinfo);
/* gprs_bssgp_vty.c */
int bssgp_vty_init(void);
void bssgp_set_log_ss(int ss);
int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx);
#endif /* _GPRS_BSSGP_H */
|
