diff options
Diffstat (limited to 'include/osmocom/gsm/lapd_core.h')
| -rw-r--r-- | include/osmocom/gsm/lapd_core.h | 171 |
1 files changed, 1 insertions, 170 deletions
diff --git a/include/osmocom/gsm/lapd_core.h b/include/osmocom/gsm/lapd_core.h index cfc357a7..a4dc2505 100644 --- a/include/osmocom/gsm/lapd_core.h +++ b/include/osmocom/gsm/lapd_core.h @@ -1,171 +1,2 @@ -/*! \file lapd_core.h - * primitive related stuff - */ #pragma once - -#include <stdint.h> - -#include <osmocom/core/timer.h> -#include <osmocom/core/msgb.h> -#include <osmocom/gsm/prim.h> - -/*! \defgroup lapd LAPD implementation common part - * @{ - * \file lapd_core.h - */ - -/*! LAPD related primitives (L2<->L3 SAP)*/ -enum osmo_dl_prim { - PRIM_DL_UNIT_DATA, /*!< DL-UNIT-DATA */ - PRIM_DL_DATA, /*!< DL-DATA */ - PRIM_DL_EST, /*!< DL-ESTABLISH */ - PRIM_DL_REL, /*!< DL-RLEEASE */ - PRIM_DL_SUSP, /*!< DL-SUSPEND */ - PRIM_DL_RES, /*!< DL-RESUME */ - PRIM_DL_RECON, /*!< DL-RECONNECT */ - PRIM_MDL_ERROR, /*!< MDL-ERROR */ -}; - -/* Uses the same values as RLL, so no conversion for GSM is required. */ -#define MDL_CAUSE_T200_EXPIRED 0x01 -#define MDL_CAUSE_REEST_REQ 0x02 -#define MDL_CAUSE_UNSOL_UA_RESP 0x03 -#define MDL_CAUSE_UNSOL_DM_RESP 0x04 -#define MDL_CAUSE_UNSOL_DM_RESP_MF 0x05 -#define MDL_CAUSE_UNSOL_SPRV_RESP 0x06 -#define MDL_CAUSE_SEQ_ERR 0x07 -#define MDL_CAUSE_UFRM_INC_PARAM 0x08 -#define MDL_CAUSE_SFRM_INC_PARAM 0x09 -#define MDL_CAUSE_IFRM_INC_MBITS 0x0a -#define MDL_CAUSE_IFRM_INC_LEN 0x0b -#define MDL_CAUSE_FRM_UNIMPL 0x0c -#define MDL_CAUSE_SABM_MF 0x0d -#define MDL_CAUSE_SABM_INFO_NOTALL 0x0e -#define MDL_CAUSE_FRMR 0x0f - -/*! for MDL-ERROR.ind */ -struct mdl_error_ind_param { - uint8_t cause; /*!< generic cause value */ -}; - -/*! for DL-REL.req */ -struct dl_rel_req_param { - uint8_t mode; /*!< release mode */ -}; - -/*! primitive header for LAPD DL-SAP primitives */ -struct osmo_dlsap_prim { - struct osmo_prim_hdr oph; /*!< generic primitive header */ - union { - struct mdl_error_ind_param error_ind; - struct dl_rel_req_param rel_req; - } u; /*!< request-specific data */ -}; - -/*! LAPD mode/role */ -enum lapd_mode { - LAPD_MODE_USER, /*!< behave like user */ - LAPD_MODE_NETWORK, /*!< behave like network */ -}; - -/*! LAPD state (Figure B.2/Q.921)*/ -enum lapd_state { - LAPD_STATE_NULL = 0, - LAPD_STATE_TEI_UNASS, - LAPD_STATE_ASS_TEI_WAIT, - LAPD_STATE_EST_TEI_WAIT, - LAPD_STATE_IDLE, - LAPD_STATE_SABM_SENT, - LAPD_STATE_DISC_SENT, - LAPD_STATE_MF_EST, - LAPD_STATE_TIMER_RECOV, -}; - -/*! LAPD message format (I / S / U) */ -enum lapd_format { - LAPD_FORM_UKN = 0, - LAPD_FORM_I, - LAPD_FORM_S, - LAPD_FORM_U, -}; - -/*! LAPD message context */ -struct lapd_msg_ctx { - struct lapd_datalink *dl; - int n201; - /* address */ - uint8_t cr; - uint8_t sapi; - uint8_t tei; - uint8_t lpd; - /* control */ - uint8_t format; - uint8_t p_f; /* poll / final bit */ - uint8_t n_send; - uint8_t n_recv; - uint8_t s_u; /* S or repectivly U function bits */ - /* length */ - int length; - uint8_t more; -}; - -struct lapd_cr_ent { - uint8_t cmd; - uint8_t resp; -}; - -struct lapd_history { - struct msgb *msg; /* message to be sent / NULL, if histoy is empty */ - int more; /* if message is fragmented */ -}; - -/*! LAPD datalink */ -struct lapd_datalink { - int (*send_dlsap)(struct osmo_dlsap_prim *dp, - struct lapd_msg_ctx *lctx); - int (*send_ph_data_req)(struct lapd_msg_ctx *lctx, struct msgb *msg); - int (*update_pending_frames)(struct lapd_msg_ctx *lctx); - struct { - /*! filled-in once we set the lapd_mode above */ - struct lapd_cr_ent loc2rem; - struct lapd_cr_ent rem2loc; - } cr; - enum lapd_mode mode; /*!< current mode of link */ - int use_sabme; /*!< use SABME instead of SABM */ - int reestablish; /*!< enable reestablish support */ - int n200, n200_est_rel; /*!< number of retranmissions */ - struct lapd_msg_ctx lctx; /*!< LAPD context */ - int maxf; /*!< maximum frame size (after defragmentation) */ - uint8_t k; /*!< maximum number of unacknowledged frames */ - uint8_t v_range; /*!< range of sequence numbers */ - uint8_t v_send; /*!< seq nr of next I frame to be transmitted */ - uint8_t v_ack; /*!< last frame ACKed by peer */ - uint8_t v_recv; /*!< seq nr of next I frame expected to be received */ - uint32_t state; /*!< LAPD state (\ref lapd_state) */ - int seq_err_cond; /*!< condition of sequence error */ - uint8_t own_busy; /*!< receiver busy on our side */ - uint8_t peer_busy; /*!< receiver busy on remote side */ - int t200_sec, t200_usec; /*!< retry timer (default 1 sec) */ - int t203_sec, t203_usec; /*!< retry timer (default 10 secs) */ - struct osmo_timer_list t200; /*!< T200 timer */ - struct osmo_timer_list t203; /*!< T203 timer */ - uint8_t retrans_ctr; /*!< re-transmission counter */ - struct llist_head tx_queue; /*!< frames to L1 */ - struct llist_head send_queue; /*!< frames from L3 */ - struct msgb *send_buffer; /*!< current frame transmitting */ - int send_out; /*!< how much was sent from send_buffer */ - struct lapd_history *tx_hist; /*!< tx history structure array */ - uint8_t range_hist; /*!< range of history buffer 2..2^n */ - struct msgb *rcv_buffer; /*!< buffer to assemble the received message */ - struct msgb *cont_res; /*!< buffer to store content resolution data on network side, to detect multiple phones on same channel */ -}; - -void lapd_dl_init(struct lapd_datalink *dl, uint8_t k, uint8_t v_range, - int maxf); -void lapd_dl_exit(struct lapd_datalink *dl); -void lapd_dl_reset(struct lapd_datalink *dl); -int lapd_set_mode(struct lapd_datalink *dl, enum lapd_mode mode); -int lapd_ph_data_ind(struct msgb *msg, struct lapd_msg_ctx *lctx); -int lapd_recv_dlsap(struct osmo_dlsap_prim *dp, struct lapd_msg_ctx *lctx); - -/*! @} */ +#include <osmocom/isdn/lapd_core.h> |