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
|
/* GPRS BSSGP protocol implementation as per 3GPP TS 08.18 */
/* (C) 2009-2012 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, see <http://www.gnu.org/licenses/>.
*
*/
#include <errno.h>
#include <stdint.h>
#include <netinet/in.h>
#include <osmocom/core/msgb.h>
#include <osmocom/gsm/tlv.h>
#include <osmocom/core/talloc.h>
#include <osmocom/gprs/gprs_bssgp.h>
#include <osmocom/gprs/gprs_ns.h>
#include "common_vty.h"
struct gprs_ns_inst *bssgp_nsi;
/* BSSGP Protocol specific, not implementation specific */
/* FIXME: This needs to go into libosmocore after finished */
/* Chapter 11.3.9 / Table 11.10: Cause coding */
static const struct value_string bssgp_cause_strings[] = {
{ BSSGP_CAUSE_PROC_OVERLOAD, "Processor overload" },
{ BSSGP_CAUSE_EQUIP_FAIL, "Equipment Failure" },
{ BSSGP_CAUSE_TRASIT_NET_FAIL, "Transit netowkr service failure" },
{ BSSGP_CAUSE_CAPA_GREATER_0KPBS,"Transmission capacity modified" },
{ BSSGP_CAUSE_UNKNOWN_MS, "Unknown MS" },
{ BSSGP_CAUSE_UNKNOWN_BVCI, "Unknown BVCI" },
{ BSSGP_CAUSE_CELL_TRAF_CONG, "Cell traffic congestion" },
{ BSSGP_CAUSE_SGSN_CONG, "SGSN congestion" },
{ BSSGP_CAUSE_OML_INTERV, "O&M intervention" },
{ BSSGP_CAUSE_BVCI_BLOCKED, "BVCI blocked" },
{ BSSGP_CAUSE_PFC_CREATE_FAIL, "PFC create failure" },
{ BSSGP_CAUSE_SEM_INCORR_PDU, "Semantically incorrect PDU" },
{ BSSGP_CAUSE_INV_MAND_INF, "Invalid mandatory information" },
{ BSSGP_CAUSE_MISSING_MAND_IE, "Missing mandatory IE" },
{ BSSGP_CAUSE_MISSING_COND_IE, "Missing conditional IE" },
{ BSSGP_CAUSE_UNEXP_COND_IE, "Unexpected conditional IE" },
{ BSSGP_CAUSE_COND_IE_ERR, "Conditional IE error" },
{ BSSGP_CAUSE_PDU_INCOMP_STATE, "PDU incompatible with protocol state" },
{ BSSGP_CAUSE_PROTO_ERR_UNSPEC, "Protocol error - unspecified" },
{ BSSGP_CAUSE_PDU_INCOMP_FEAT, "PDU not compatible with feature set" },
{ 0, NULL },
};
const char *bssgp_cause_str(enum gprs_bssgp_cause cause)
{
return get_value_string(bssgp_cause_strings, cause);
}
struct msgb *bssgp_msgb_alloc(void)
{
struct msgb *msg = msgb_alloc_headroom(4096, 128, "BSSGP");
/* TODO: Add handling of msg == NULL to this function and to all callers */
OSMO_ASSERT(msg != NULL);
msgb_bssgph(msg) = msg->data;
return msg;
}
/* 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));
/* GSM 08.18, 10.4.14.1: The BVCI must be included if (and only if) the
cause is either "BVCI blocked" or "BVCI unknown" */
if (cause == BSSGP_CAUSE_UNKNOWN_BVCI || cause == BSSGP_CAUSE_BVCI_BLOCKED) {
if (bvci == NULL)
LOGP(DBSSGP, LOGL_ERROR, "BSSGP Tx STATUS, cause=%s: "
"missing conditional BVCI\n",
bssgp_cause_str(cause));
} else {
if (bvci != NULL)
LOGP(DBSSGP, LOGL_ERROR, "BSSGP Tx STATUS, cause=%s: "
"unexpected conditional BVCI\n",
bssgp_cause_str(cause));
}
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);
}
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);
}
|
