GNU Radio's GSM Package
gsmtap.h
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#ifndef _GSMTAP_H
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#define _GSMTAP_H
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/* gsmtap header, pseudo-header in front of the actua GSM payload */
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/* GSMTAP is a generic header format for GSM protocol captures,
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* it uses the IANA-assigned UDP port number 4729 and carries
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* payload in various formats of GSM interfaces such as Um MAC
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* blocks or Um bursts.
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*
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* Example programs generating GSMTAP data are airprobe
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* (http://airprobe.org/) or OsmocomBB (http://bb.osmocom.org/)
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*/
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#include <stdint.h>
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#define GSMTAP_VERSION 0x02
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#define GSMTAP_TYPE_UM 0x01
/* A Layer 2 MAC block (23 bytes) */
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#define GSMTAP_TYPE_ABIS 0x02
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#define GSMTAP_TYPE_UM_BURST 0x03
/* raw burst bits */
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#define GSMTAP_BURST_UNKNOWN 0x00
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#define GSMTAP_BURST_FCCH 0x01
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#define GSMTAP_BURST_PARTIAL_SCH 0x02
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#define GSMTAP_BURST_SCH 0x03
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#define GSMTAP_BURST_CTS_SCH 0x04
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#define GSMTAP_BURST_COMPACT_SCH 0x05
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#define GSMTAP_BURST_NORMAL 0x06
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#define GSMTAP_BURST_DUMMY 0x07
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#define GSMTAP_BURST_ACCESS 0x08
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#define GSMTAP_BURST_NONE 0x09
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#define GSMTAP_CHANNEL_UNKNOWN 0x00
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#define GSMTAP_CHANNEL_BCCH 0x01
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#define GSMTAP_CHANNEL_CCCH 0x02
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#define GSMTAP_CHANNEL_RACH 0x03
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#define GSMTAP_CHANNEL_AGCH 0x04
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#define GSMTAP_CHANNEL_PCH 0x05
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#define GSMTAP_CHANNEL_SDCCH 0x06
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#define GSMTAP_CHANNEL_SDCCH4 0x07
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#define GSMTAP_CHANNEL_SDCCH8 0x08
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#define GSMTAP_CHANNEL_TCH_F 0x09
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#define GSMTAP_CHANNEL_TCH_H 0x0a
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#define GSMTAP_CHANNEL_ACCH 0x80
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#define GSMTAP_ARFCN_F_PCS 0x8000
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#define GSMTAP_ARFCN_F_UPLINK 0x4000
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#define GSMTAP_ARFCN_MASK 0x3fff
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#define GSMTAP_UDP_PORT 4729
/* officially registered with IANA */
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#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)
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# define __WINDOWS__
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#endif
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#ifdef __WINDOWS__
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#define PACKED( class_to_pack ) __pragma( pack(push, 1) ) class_to_pack __pragma( pack(pop) )
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#else
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#define PACKED( class_to_pack ) class_to_pack __attribute__((__packed__))
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#endif
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PACKED
(
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struct
gsmtap_hdr {
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uint8_t version;
/* version, set to GSMTAP_VERSION */
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uint8_t hdr_len;
/* length in number of 32bit words */
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uint8_t type;
/* see GSMTAP_TYPE_* */
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uint8_t timeslot;
/* timeslot (0..7 on Um) */
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uint16_t arfcn;
/* ARFCN (frequency) */
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int8_t signal_dbm;
/* signal level in dBm */
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int8_t snr_db;
/* signal/noise ratio in dB */
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uint32_t frame_number;
/* GSM Frame Number (FN) */
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uint8_t sub_type;
/* Type of burst/channel, see above */
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uint8_t antenna_nr;
/* Antenna Number */
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uint8_t sub_slot;
/* sub-slot within timeslot */
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uint8_t res;
/* reserved for future use (RFU) */
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}
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);
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#endif
/* _GSMTAP_H */
PACKED
#define PACKED(class_to_pack)
Definition
gsmtap.h:60
include
gsm
gsmtap.h
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