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#ifndef TETRA_LLC_PDU_H
#define TETRA_LLC_PDU_H
#include <osmocom/core/linuxlist.h>
/* Table 21.1 */
enum tetra_llc_pdu_t {
TLLC_PDUT_BL_ADATA = 0,
TLLC_PDUT_BL_DATA = 1,
TLLC_PDUT_BL_UDATA = 2,
TLLC_PDUT_BL_ACK = 3,
TLLC_PDUT_BL_ADATA_FCS = 4,
TLLC_PDUT_BL_DATA_FCS = 5,
TLLC_PDUT_BL_UDATA_FCS = 6,
TLLC_PDUT_BL_ACK_FCS = 7,
TLLC_PDUT_AL_SETUP = 8,
TLLC_PDUT_AL_DATA_FINAL = 9,
TLLC_PDUT_AL_UDATA_UFINAL = 10,
TLLC_PDUT_AL_ACK_RNR = 11,
TLLC_PDUT_AL_RECONNECT = 12,
TLLC_PDUT_SUPPL = 13,
TLLC_PDUT_L2SIG = 14,
TLLD_PDUT_AL_DISC = 15
};
const char *tetra_get_llc_pdut_name(uint8_t pdut);
/* Table 21.2 */
enum tetra_llc_l2sig_pdu_t {
TLLC_PDUT_L2_DATA_PRIO = 0,
TLLC_PDUT_L2_SCHEDULE_SYNC = 1,
TLLC_PDUT_L2_LINK_FB_CTRL = 2,
TLLC_PDUT_L2_LINK_FB_INFO = 3,
TLLC_PDUT_L2_LINK_FB_INFO_RD_PRIO = 4
};
/* Table 21.3 */
enum tetra_llc_suppl_pdu_t {
TLLC_PDUT_SUPPL_ALX_DATA_FINAL = 0,
TLLC_PDUT_SUPPL_ALX_UDATA_UFINAL = 1,
TLLC_PDUT_SUPPL_ALX_ACK_RNR = 2
};
/* Decoded */
enum tllc_pdut_dec {
TLLC_PDUT_DEC_UNKNOWN,
TLLC_PDUT_DEC_BL_ADATA,
TLLC_PDUT_DEC_BL_DATA,
TLLC_PDUT_DEC_BL_UDATA,
TLLC_PDUT_DEC_BL_ACK,
TLLC_PDUT_DEC_AL_SETUP,
TLLC_PDUT_DEC_AL_DATA,
TLLC_PDUT_DEC_AL_FINAL,
TLLC_PDUT_DEC_AL_UDATA,
TLLC_PDUT_DEC_AL_UFINAL,
TLLC_PDUT_DEC_AL_ACK,
TLLC_PDUT_DEC_AL_RNR,
TLLC_PDUT_DEC_AL_RECONNECT,
TLLC_PDUT_DEC_AL_DISC,
TLLC_PDUT_DEC_ALX_DATA,
TLLC_PDUT_DEC_ALX_FINAL,
TLLC_PDUT_DEC_ALX_UDATA,
TLLC_PDUT_DEC_ALX_UFINAL,
TLLC_PDUT_DEC_ALX_ACK,
TLLC_PDUT_DEC_ALX_RNR,
};
const char *tetra_get_llc_pdut_dec_name(enum tllc_pdut_dec pdut);
/* decoded/parsed PDU with easier encoding */
struct tetra_llc_pdu {
enum tllc_pdut_dec pdu_type;
uint8_t nr; /* N(R) PDU number (receive) */
uint8_t ns; /* N(S) PDU number (sent) */
uint8_t ss; /* S(S) Segment (sent) */
uint32_t _fcs;
uint32_t *fcs;
uint8_t *tl_sdu; /* pointer to bitbuf */
uint8_t tl_sdu_len; /* in bits */
};
/* parse a received LLC PDU and parse it into 'lpp' */
int tetra_llc_pdu_parse(struct tetra_llc_pdu *lpp, uint8_t *buf, int len);
/* TETRA LLC state */
struct tllc_state {
struct llist_head list;
struct {
struct llist_head defrag_list;
} rx;
};
/* entry in the defragmentation queue */
struct tllc_defrag_q_e {
struct llist_head list;
unsigned int ns; /* current de-fragmenting */
unsigned int last_ss; /* last received S(S) */
struct msgb *tl_sdu;
};
#endif /* TETRA_LLC_PDU_H */
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