GNU Radio's GSM Package
gsmtap.h
Go to the documentation of this file.
1
#ifndef _GSMTAP_H
2
#define _GSMTAP_H
3
4
/* gsmtap header, pseudo-header in front of the actua GSM payload */
5
6
/* GSMTAP is a generic header format for GSM protocol captures,
7
* it uses the IANA-assigned UDP port number 4729 and carries
8
* payload in various formats of GSM interfaces such as Um MAC
9
* blocks or Um bursts.
10
*
11
* Example programs generating GSMTAP data are airprobe
12
* (http://airprobe.org/) or OsmocomBB (http://bb.osmocom.org/)
13
*/
14
15
#include <stdint.h>
16
17
#define GSMTAP_VERSION 0x02
18
19
#define GSMTAP_TYPE_UM 0x01
/* A Layer 2 MAC block (23 bytes) */
20
#define GSMTAP_TYPE_ABIS 0x02
21
#define GSMTAP_TYPE_UM_BURST 0x03
/* raw burst bits */
22
23
#define GSMTAP_BURST_UNKNOWN 0x00
24
#define GSMTAP_BURST_FCCH 0x01
25
#define GSMTAP_BURST_PARTIAL_SCH 0x02
26
#define GSMTAP_BURST_SCH 0x03
27
#define GSMTAP_BURST_CTS_SCH 0x04
28
#define GSMTAP_BURST_COMPACT_SCH 0x05
29
#define GSMTAP_BURST_NORMAL 0x06
30
#define GSMTAP_BURST_DUMMY 0x07
31
#define GSMTAP_BURST_ACCESS 0x08
32
#define GSMTAP_BURST_NONE 0x09
33
34
#define GSMTAP_CHANNEL_UNKNOWN 0x00
35
#define GSMTAP_CHANNEL_BCCH 0x01
36
#define GSMTAP_CHANNEL_CCCH 0x02
37
#define GSMTAP_CHANNEL_RACH 0x03
38
#define GSMTAP_CHANNEL_AGCH 0x04
39
#define GSMTAP_CHANNEL_PCH 0x05
40
#define GSMTAP_CHANNEL_SDCCH 0x06
41
#define GSMTAP_CHANNEL_SDCCH4 0x07
42
#define GSMTAP_CHANNEL_SDCCH8 0x08
43
#define GSMTAP_CHANNEL_TCH_F 0x09
44
#define GSMTAP_CHANNEL_TCH_H 0x0a
45
#define GSMTAP_CHANNEL_ACCH 0x80
46
47
#define GSMTAP_ARFCN_F_PCS 0x8000
48
#define GSMTAP_ARFCN_F_UPLINK 0x4000
49
#define GSMTAP_ARFCN_MASK 0x3fff
50
51
#define GSMTAP_UDP_PORT 4729
/* officially registered with IANA */
52
53
struct
gsmtap_hdr
{
54
uint8_t
version
;
/* version, set to GSMTAP_VERSION */
55
uint8_t
hdr_len
;
/* length in number of 32bit words */
56
uint8_t
type
;
/* see GSMTAP_TYPE_* */
57
uint8_t
timeslot
;
/* timeslot (0..7 on Um) */
58
59
uint16_t
arfcn
;
/* ARFCN (frequency) */
60
int8_t
signal_dbm
;
/* signal level in dBm */
61
int8_t
snr_db
;
/* signal/noise ratio in dB */
62
63
uint32_t
frame_number
;
/* GSM Frame Number (FN) */
64
65
uint8_t
sub_type
;
/* Type of burst/channel, see above */
66
uint8_t
antenna_nr
;
/* Antenna Number */
67
uint8_t
sub_slot
;
/* sub-slot within timeslot */
68
uint8_t
res
;
/* reserved for future use (RFU) */
69
70
}
__attribute__
((packed));
71
72
#endif
/* _GSMTAP_H */
gsmtap_hdr::arfcn
uint16_t arfcn
Definition:
gsmtap.h:59
gsmtap_hdr::hdr_len
uint8_t hdr_len
Definition:
gsmtap.h:55
gsmtap_hdr::version
uint8_t version
Definition:
gsmtap.h:54
gsmtap_hdr::signal_dbm
int8_t signal_dbm
Definition:
gsmtap.h:60
gsmtap_hdr::frame_number
uint32_t frame_number
Definition:
gsmtap.h:63
gsmtap_hdr::sub_slot
uint8_t sub_slot
Definition:
gsmtap.h:67
gsmtap_hdr::timeslot
uint8_t timeslot
Definition:
gsmtap.h:57
gsmtap_hdr::sub_type
uint8_t sub_type
Definition:
gsmtap.h:65
gsmtap_hdr::type
uint8_t type
Definition:
gsmtap.h:56
gsmtap_hdr::antenna_nr
uint8_t antenna_nr
Definition:
gsmtap.h:66
gsmtap_hdr
Definition:
gsmtap.h:53
gsmtap_hdr::res
uint8_t res
Definition:
gsmtap.h:68
__attribute__
struct gsmtap_hdr __attribute__((packed))
gsmtap_hdr::snr_db
int8_t snr_db
Definition:
gsmtap.h:61
include
grgsm
gsmtap.h
Generated by
1.8.5