LAPD core implementation. More...

#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/talloc.h>
#include <osmocom/isdn/lapd_core.h>
#include <osmocom/gsm/rsl.h>

Data Structures
struct	l2downstate

Macros
#define	LAPD_U_SABM 0x7

#define	LAPD_U_SABME 0xf

#define	LAPD_U_DM 0x3

#define	LAPD_U_UI 0x0

#define	LAPD_U_DISC 0x8

#define	LAPD_U_UA 0xC

#define	LAPD_U_FRMR 0x11

#define	LAPD_S_RR 0x0

#define	LAPD_S_RNR 0x1

#define	LAPD_S_REJ 0x2

#define	CR_USER2NET_CMD 0

#define	CR_USER2NET_RESP 1

#define	CR_NET2USER_CMD 1

#define	CR_NET2USER_RESP 0

#define	LAPD_HEADROOM 56

#define	LAPD_TAILROOM 16

#define	SBIT(a) (1 << a)

#define	ALL_STATES 0xffffffff

#define	L2DOWNSLLEN (sizeof(l2downstatelist) / sizeof(struct l2downstate))

Functions
static void	lapd_t200_cb (void *data)

static void	lapd_t203_cb (void *data)

static int	lapd_send_i (struct lapd_datalink *dl, int line, bool rts)

static int	lapd_est_req (struct osmo_dlsap_prim dp, struct lapd_msg_ctx lctx)

struct msgb *	lapd_msgb_alloc (int length, const char *name)

static uint8_t	do_mod (uint8_t x, uint8_t m)

static uint8_t	inc_mod (uint8_t x, uint8_t m)

static uint8_t	add_mod (uint8_t x, uint8_t y, uint8_t m)

static uint8_t	sub_mod (uint8_t x, uint8_t y, uint8_t m)

static void	lapd_dl_flush_send (struct lapd_datalink *dl)

static void	lapd_dl_flush_hist (struct lapd_datalink *dl)

static void	lapd_dl_flush_tx_queue (struct lapd_datalink *dl)

static void	lapd_dl_flush_tx (struct lapd_datalink *dl)

static const char *	lapd_state_name (enum lapd_state state)

static void	lapd_start_t200 (struct lapd_datalink *dl)

int	lapd_t200_timeout (struct lapd_datalink *dl)
	Handle timeout condition of T200 in RTS mode. More...

static void	lapd_start_t203 (struct lapd_datalink *dl)

static void	lapd_stop_t200 (struct lapd_datalink *dl)

static bool	lapd_is_t200_started (struct lapd_datalink *dl)

static void	lapd_stop_t203 (struct lapd_datalink *dl)

static void	lapd_dl_newstate (struct lapd_datalink *dl, uint32_t state)

void	lapd_dl_init2 (struct lapd_datalink dl, uint8_t k, uint8_t v_range, int maxf, const char name)
	Initialize LAPD datalink instance and allocate history. More...

void	lapd_dl_init (struct lapd_datalink *dl, uint8_t k, uint8_t v_range, int maxf)
	Initialize LAPD datalink instance and allocate history. More...

void	lapd_dl_set_name (struct lapd_datalink dl, const char name)

void	lapd_dl_reset (struct lapd_datalink *dl)

int	lapd_dl_set_flags (struct lapd_datalink *dl, unsigned int flags)
	Set lapd_flags to change behaviour. More...

void	lapd_dl_exit (struct lapd_datalink *dl)

int	lapd_set_mode (struct lapd_datalink *dl, enum lapd_mode mode)
	Set the lapdm_mode of a LAPDm entity. More...

static int	send_dl_l3 (uint8_t prim, uint8_t op, struct lapd_msg_ctx lctx, struct msgb msg)

static int	send_dl_simple (uint8_t prim, uint8_t op, struct lapd_msg_ctx *lctx)

static int	mdl_error (uint8_t cause, struct lapd_msg_ctx *lctx)

static int	lapd_send_ua (struct lapd_msg_ctx lctx, uint8_t len, uint8_t data)

static int	lapd_send_dm (struct lapd_msg_ctx *lctx)

static int	lapd_send_rr (struct lapd_msg_ctx *lctx, uint8_t f_bit, uint8_t cmd)

static int	lapd_send_rnr (struct lapd_msg_ctx *lctx, uint8_t f_bit, uint8_t cmd)

static int	lapd_send_rej (struct lapd_msg_ctx *lctx, uint8_t f_bit)

static int	lapd_send_resend (struct lapd_datalink *dl)

static int	lapd_reestablish (struct lapd_datalink *dl)

static int	lapd_acknowledge (struct lapd_msg_ctx *lctx)

static int	lapd_rx_u_sabm (struct msgb msg, struct lapd_msg_ctx lctx)

static int	lapd_rx_u_dm (struct msgb msg, struct lapd_msg_ctx lctx)

static int	lapd_rx_u_ui (struct msgb msg, struct lapd_msg_ctx lctx)

static int	lapd_rx_u_disc (struct msgb msg, struct lapd_msg_ctx lctx)

static int	lapd_rx_u_ua (struct msgb msg, struct lapd_msg_ctx lctx)

static int	lapd_rx_u_frmr (struct msgb msg, struct lapd_msg_ctx lctx)

static int	lapd_rx_u (struct msgb msg, struct lapd_msg_ctx lctx)

static int	lapd_rx_s (struct msgb msg, struct lapd_msg_ctx lctx)

static int	lapd_rx_i (struct msgb msg, struct lapd_msg_ctx lctx)

int	lapd_ph_data_ind (struct msgb msg, struct lapd_msg_ctx lctx)

int	lapd_ph_rts_ind (struct lapd_msg_ctx *lctx)
	Enqueue next LAPD frame and run pending T200. More...

static int	lapd_udata_req (struct osmo_dlsap_prim dp, struct lapd_msg_ctx lctx)

static void	msg_to_tx_hist (struct lapd_history tx_hist, const struct msgb msg, int length, int more)

static void	msg_to_tx_hist0 (struct lapd_datalink dl, const struct msgb msg)

static int	lapd_data_req (struct osmo_dlsap_prim dp, struct lapd_msg_ctx lctx)

static int	lapd_susp_req (struct osmo_dlsap_prim dp, struct lapd_msg_ctx lctx)

static int	lapd_res_req (struct osmo_dlsap_prim dp, struct lapd_msg_ctx lctx)

static int	lapd_rel_req (struct osmo_dlsap_prim dp, struct lapd_msg_ctx lctx)

static int	lapd_rel_req_idle (struct osmo_dlsap_prim dp, struct lapd_msg_ctx lctx)

int	lapd_recv_dlsap (struct osmo_dlsap_prim dp, struct lapd_msg_ctx lctx)

Variables
const struct value_string	lapd_state_names []

void *	tall_lapd_ctx = NULL

static const struct l2downstate	l2downstatelist []

Detailed Description

LAPD core implementation.

Data Structures

Macros

Functions

Variables

Detailed Description