- Generated on Sat Aug 20 2011 13:05:06 for libosmocore by
1.7.4
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libosmocore 0.3.6
Osmocom core library
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00001 #ifndef _GSMTAP_H 00002 #define _GSMTAP_H 00003 00004 /* gsmtap header, pseudo-header in front of the actua GSM payload */ 00005 00006 /* GSMTAP is a generic header format for GSM protocol captures, 00007 * it uses the IANA-assigned UDP port number 4729 and carries 00008 * payload in various formats of GSM interfaces such as Um MAC 00009 * blocks or Um bursts. 00010 * 00011 * Example programs generating GSMTAP data are airprobe 00012 * (http://airprobe.org/) or OsmocomBB (http://bb.osmocom.org/) 00013 */ 00014 00015 #include <stdint.h> 00016 00017 #define GSMTAP_VERSION 0x02 00018 00019 #define GSMTAP_TYPE_UM 0x01 00020 #define GSMTAP_TYPE_ABIS 0x02 00021 #define GSMTAP_TYPE_UM_BURST 0x03 /* raw burst bits */ 00022 #define GSMTAP_TYPE_SIM 0x04 00023 #define GSMTAP_TYPE_TETRA_I1 0x05 /* tetra air interface */ 00024 #define GSMTAP_TYPE_TETRA_I1_BURST 0x06 /* tetra air interface */ 00025 00026 /* sub-types for TYPE_UM_BURST */ 00027 #define GSMTAP_BURST_UNKNOWN 0x00 00028 #define GSMTAP_BURST_FCCH 0x01 00029 #define GSMTAP_BURST_PARTIAL_SCH 0x02 00030 #define GSMTAP_BURST_SCH 0x03 00031 #define GSMTAP_BURST_CTS_SCH 0x04 00032 #define GSMTAP_BURST_COMPACT_SCH 0x05 00033 #define GSMTAP_BURST_NORMAL 0x06 00034 #define GSMTAP_BURST_DUMMY 0x07 00035 #define GSMTAP_BURST_ACCESS 0x08 00036 #define GSMTAP_BURST_NONE 0x09 00037 00038 /* sub-types for TYPE_UM */ 00039 #define GSMTAP_CHANNEL_UNKNOWN 0x00 00040 #define GSMTAP_CHANNEL_BCCH 0x01 00041 #define GSMTAP_CHANNEL_CCCH 0x02 00042 #define GSMTAP_CHANNEL_RACH 0x03 00043 #define GSMTAP_CHANNEL_AGCH 0x04 00044 #define GSMTAP_CHANNEL_PCH 0x05 00045 #define GSMTAP_CHANNEL_SDCCH 0x06 00046 #define GSMTAP_CHANNEL_SDCCH4 0x07 00047 #define GSMTAP_CHANNEL_SDCCH8 0x08 00048 #define GSMTAP_CHANNEL_TCH_F 0x09 00049 #define GSMTAP_CHANNEL_TCH_H 0x0a 00050 #define GSMTAP_CHANNEL_ACCH 0x80 00051 00052 /* sub-types for TYPE_TETRA_AIR */ 00053 #define GSMTAP_TETRA_BSCH 0x01 00054 #define GSMTAP_TETRA_AACH 0x02 00055 #define GSMTAP_TETRA_SCH_HU 0x03 00056 #define GSMTAP_TETRA_SCH_HD 0x04 00057 #define GSMTAP_TETRA_SCH_F 0x05 00058 #define GSMTAP_TETRA_BNCH 0x06 00059 #define GSMTAP_TETRA_STCH 0x07 00060 #define GSMTAP_TETRA_TCH_F 0x08 00061 00062 /* flags for the ARFCN */ 00063 #define GSMTAP_ARFCN_F_PCS 0x8000 00064 #define GSMTAP_ARFCN_F_UPLINK 0x4000 00065 #define GSMTAP_ARFCN_MASK 0x3fff 00066 00067 /* IANA-assigned well-known UDP port for GSMTAP messages */ 00068 #define GSMTAP_UDP_PORT 4729 00069 00070 struct gsmtap_hdr { 00071 uint8_t version; /* version, set to 0x01 currently */ 00072 uint8_t hdr_len; /* length in number of 32bit words */ 00073 uint8_t type; /* see GSMTAP_TYPE_* */ 00074 uint8_t timeslot; /* timeslot (0..7 on Um) */ 00075 00076 uint16_t arfcn; /* ARFCN (frequency) */ 00077 int8_t signal_dbm; /* signal level in dBm */ 00078 int8_t snr_db; /* signal/noise ratio in dB */ 00079 00080 uint32_t frame_number; /* GSM Frame Number (FN) */ 00081 00082 uint8_t sub_type; /* Type of burst/channel, see above */ 00083 uint8_t antenna_nr; /* Antenna Number */ 00084 uint8_t sub_slot; /* sub-slot within timeslot */ 00085 uint8_t res; /* reserved for future use (RFU) */ 00086 00087 } __attribute__((packed)); 00088 00089 #endif /* _GSMTAP_H */
1.7.4