295 lines
8.9 KiB
C
295 lines
8.9 KiB
C
/*********************************************************************
|
|
*
|
|
* Filename: irlmp.h
|
|
* Version: 0.9
|
|
* Description: IrDA Link Management Protocol (LMP) layer
|
|
* Status: Experimental.
|
|
* Author: Dag Brattli <dagb@cs.uit.no>
|
|
* Created at: Sun Aug 17 20:54:32 1997
|
|
* Modified at: Fri Dec 10 13:23:01 1999
|
|
* Modified by: Dag Brattli <dagb@cs.uit.no>
|
|
*
|
|
* Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
|
|
* All Rights Reserved.
|
|
* Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* Neither Dag Brattli nor University of Tromsø admit liability nor
|
|
* provide warranty for any of this software. This material is
|
|
* provided "AS-IS" and at no charge.
|
|
*
|
|
********************************************************************/
|
|
|
|
#ifndef IRLMP_H
|
|
#define IRLMP_H
|
|
|
|
#include <asm/param.h> /* for HZ */
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <net/irda/irda.h>
|
|
#include <net/irda/qos.h>
|
|
#include <net/irda/irlap.h> /* LAP_MAX_HEADER, ... */
|
|
#include <net/irda/irlmp_event.h>
|
|
#include <net/irda/irqueue.h>
|
|
#include <net/irda/discovery.h>
|
|
|
|
/* LSAP-SEL's */
|
|
#define LSAP_MASK 0x7f
|
|
#define LSAP_IAS 0x00
|
|
#define LSAP_ANY 0xff
|
|
#define LSAP_MAX 0x6f /* 0x70-0x7f are reserved */
|
|
#define LSAP_CONNLESS 0x70 /* Connectionless LSAP, mostly used for Ultra */
|
|
|
|
#define DEV_ADDR_ANY 0xffffffff
|
|
|
|
#define LMP_HEADER 2 /* Dest LSAP + Source LSAP */
|
|
#define LMP_CONTROL_HEADER 4 /* LMP_HEADER + opcode + parameter */
|
|
#define LMP_PID_HEADER 1 /* Used by Ultra */
|
|
#define LMP_MAX_HEADER (LMP_CONTROL_HEADER+LAP_MAX_HEADER)
|
|
|
|
#define LM_MAX_CONNECTIONS 10
|
|
|
|
#define LM_IDLE_TIMEOUT 2*HZ /* 2 seconds for now */
|
|
|
|
typedef enum {
|
|
S_PNP = 0,
|
|
S_PDA,
|
|
S_COMPUTER,
|
|
S_PRINTER,
|
|
S_MODEM,
|
|
S_FAX,
|
|
S_LAN,
|
|
S_TELEPHONY,
|
|
S_COMM,
|
|
S_OBEX,
|
|
S_ANY,
|
|
S_END,
|
|
} SERVICE;
|
|
|
|
/* For selective discovery */
|
|
typedef void (*DISCOVERY_CALLBACK1) (discinfo_t *, DISCOVERY_MODE, void *);
|
|
/* For expiry (the same) */
|
|
typedef void (*DISCOVERY_CALLBACK2) (discinfo_t *, DISCOVERY_MODE, void *);
|
|
|
|
typedef struct {
|
|
irda_queue_t queue; /* Must be first */
|
|
|
|
__u16_host_order hints; /* Hint bits */
|
|
} irlmp_service_t;
|
|
|
|
typedef struct {
|
|
irda_queue_t queue; /* Must be first */
|
|
|
|
__u16_host_order hint_mask;
|
|
|
|
DISCOVERY_CALLBACK1 disco_callback; /* Selective discovery */
|
|
DISCOVERY_CALLBACK2 expir_callback; /* Selective expiration */
|
|
void *priv; /* Used to identify client */
|
|
} irlmp_client_t;
|
|
|
|
/*
|
|
* Information about each logical LSAP connection
|
|
*/
|
|
struct lsap_cb {
|
|
irda_queue_t queue; /* Must be first */
|
|
magic_t magic;
|
|
|
|
unsigned long connected; /* set_bit used on this */
|
|
int persistent;
|
|
|
|
__u8 slsap_sel; /* Source (this) LSAP address */
|
|
__u8 dlsap_sel; /* Destination LSAP address (if connected) */
|
|
#ifdef CONFIG_IRDA_ULTRA
|
|
__u8 pid; /* Used by connectionless LSAP */
|
|
#endif /* CONFIG_IRDA_ULTRA */
|
|
struct sk_buff *conn_skb; /* Store skb here while connecting */
|
|
|
|
struct timer_list watchdog_timer;
|
|
|
|
LSAP_STATE lsap_state; /* Connection state */
|
|
notify_t notify; /* Indication/Confirm entry points */
|
|
struct qos_info qos; /* QoS for this connection */
|
|
|
|
struct lap_cb *lap; /* Pointer to LAP connection structure */
|
|
};
|
|
|
|
/*
|
|
* Used for caching the last slsap->dlsap->handle mapping
|
|
*
|
|
* We don't need to keep/match the remote address in the cache because
|
|
* we are associated with a specific LAP (which implies it).
|
|
* Jean II
|
|
*/
|
|
typedef struct {
|
|
int valid;
|
|
|
|
__u8 slsap_sel;
|
|
__u8 dlsap_sel;
|
|
struct lsap_cb *lsap;
|
|
} CACHE_ENTRY;
|
|
|
|
/*
|
|
* Information about each registered IrLAP layer
|
|
*/
|
|
struct lap_cb {
|
|
irda_queue_t queue; /* Must be first */
|
|
magic_t magic;
|
|
|
|
int reason; /* LAP disconnect reason */
|
|
|
|
IRLMP_STATE lap_state;
|
|
|
|
struct irlap_cb *irlap; /* Instance of IrLAP layer */
|
|
hashbin_t *lsaps; /* LSAP associated with this link */
|
|
struct lsap_cb *flow_next; /* Next lsap to be polled for Tx */
|
|
|
|
__u8 caddr; /* Connection address */
|
|
__u32 saddr; /* Source device address */
|
|
__u32 daddr; /* Destination device address */
|
|
|
|
struct qos_info *qos; /* LAP QoS for this session */
|
|
struct timer_list idle_timer;
|
|
|
|
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
|
|
/* The lsap cache was moved from struct irlmp_cb to here because
|
|
* it must be associated with the specific LAP. Also, this
|
|
* improves performance. - Jean II */
|
|
CACHE_ENTRY cache; /* Caching last slsap->dlsap->handle mapping */
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Main structure for IrLMP
|
|
*/
|
|
struct irlmp_cb {
|
|
magic_t magic;
|
|
|
|
__u8 conflict_flag;
|
|
|
|
discovery_t discovery_cmd; /* Discovery command to use by IrLAP */
|
|
discovery_t discovery_rsp; /* Discovery response to use by IrLAP */
|
|
|
|
/* Last lsap picked automatically by irlmp_find_free_slsap() */
|
|
int last_lsap_sel;
|
|
|
|
struct timer_list discovery_timer;
|
|
|
|
hashbin_t *links; /* IrLAP connection table */
|
|
hashbin_t *unconnected_lsaps;
|
|
hashbin_t *clients;
|
|
hashbin_t *services;
|
|
|
|
hashbin_t *cachelog; /* Current discovery log */
|
|
|
|
int running;
|
|
|
|
__u16_host_order hints; /* Hint bits */
|
|
};
|
|
|
|
/* Prototype declarations */
|
|
int irlmp_init(void);
|
|
void irlmp_cleanup(void);
|
|
struct lsap_cb *irlmp_open_lsap(__u8 slsap, notify_t *notify, __u8 pid);
|
|
void irlmp_close_lsap( struct lsap_cb *self);
|
|
|
|
__u16 irlmp_service_to_hint(int service);
|
|
void *irlmp_register_service(__u16 hints);
|
|
int irlmp_unregister_service(void *handle);
|
|
void *irlmp_register_client(__u16 hint_mask, DISCOVERY_CALLBACK1 disco_clb,
|
|
DISCOVERY_CALLBACK2 expir_clb, void *priv);
|
|
int irlmp_unregister_client(void *handle);
|
|
int irlmp_update_client(void *handle, __u16 hint_mask,
|
|
DISCOVERY_CALLBACK1 disco_clb,
|
|
DISCOVERY_CALLBACK2 expir_clb, void *priv);
|
|
|
|
void irlmp_register_link(struct irlap_cb *, __u32 saddr, notify_t *);
|
|
void irlmp_unregister_link(__u32 saddr);
|
|
|
|
int irlmp_connect_request(struct lsap_cb *, __u8 dlsap_sel,
|
|
__u32 saddr, __u32 daddr,
|
|
struct qos_info *, struct sk_buff *);
|
|
void irlmp_connect_indication(struct lsap_cb *self, struct sk_buff *skb);
|
|
int irlmp_connect_response(struct lsap_cb *, struct sk_buff *);
|
|
void irlmp_connect_confirm(struct lsap_cb *, struct sk_buff *);
|
|
struct lsap_cb *irlmp_dup(struct lsap_cb *self, void *instance);
|
|
|
|
void irlmp_disconnect_indication(struct lsap_cb *self, LM_REASON reason,
|
|
struct sk_buff *userdata);
|
|
int irlmp_disconnect_request(struct lsap_cb *, struct sk_buff *userdata);
|
|
|
|
void irlmp_discovery_confirm(hashbin_t *discovery_log, DISCOVERY_MODE mode);
|
|
void irlmp_discovery_request(int nslots);
|
|
discinfo_t *irlmp_get_discoveries(int *pn, __u16 mask, int nslots);
|
|
void irlmp_do_expiry(void);
|
|
void irlmp_do_discovery(int nslots);
|
|
discovery_t *irlmp_get_discovery_response(void);
|
|
void irlmp_discovery_expiry(discinfo_t *expiry, int number);
|
|
|
|
int irlmp_data_request(struct lsap_cb *, struct sk_buff *);
|
|
void irlmp_data_indication(struct lsap_cb *, struct sk_buff *);
|
|
|
|
int irlmp_udata_request(struct lsap_cb *, struct sk_buff *);
|
|
void irlmp_udata_indication(struct lsap_cb *, struct sk_buff *);
|
|
|
|
#ifdef CONFIG_IRDA_ULTRA
|
|
int irlmp_connless_data_request(struct lsap_cb *, struct sk_buff *, __u8);
|
|
void irlmp_connless_data_indication(struct lsap_cb *, struct sk_buff *);
|
|
#endif /* CONFIG_IRDA_ULTRA */
|
|
|
|
void irlmp_status_indication(struct lap_cb *, LINK_STATUS link, LOCK_STATUS lock);
|
|
void irlmp_flow_indication(struct lap_cb *self, LOCAL_FLOW flow);
|
|
|
|
LM_REASON irlmp_convert_lap_reason(LAP_REASON);
|
|
|
|
static inline __u32 irlmp_get_saddr(const struct lsap_cb *self)
|
|
{
|
|
return (self && self->lap) ? self->lap->saddr : 0;
|
|
}
|
|
|
|
static inline __u32 irlmp_get_daddr(const struct lsap_cb *self)
|
|
{
|
|
return (self && self->lap) ? self->lap->daddr : 0;
|
|
}
|
|
|
|
extern const char *irlmp_reasons[];
|
|
extern int sysctl_discovery_timeout;
|
|
extern int sysctl_discovery_slots;
|
|
extern int sysctl_discovery;
|
|
extern int sysctl_lap_keepalive_time; /* in ms, default is LM_IDLE_TIMEOUT */
|
|
extern struct irlmp_cb *irlmp;
|
|
|
|
/* Check if LAP queue is full.
|
|
* Used by IrTTP for low control, see comments in irlap.h - Jean II */
|
|
static inline int irlmp_lap_tx_queue_full(struct lsap_cb *self)
|
|
{
|
|
if (self == NULL)
|
|
return 0;
|
|
if (self->lap == NULL)
|
|
return 0;
|
|
if (self->lap->irlap == NULL)
|
|
return 0;
|
|
|
|
return IRLAP_GET_TX_QUEUE_LEN(self->lap->irlap) >= LAP_HIGH_THRESHOLD;
|
|
}
|
|
|
|
/* After doing a irlmp_dup(), this get one of the two socket back into
|
|
* a state where it's waiting incomming connections.
|
|
* Note : this can be used *only* if the socket is not yet connected
|
|
* (i.e. NO irlmp_connect_response() done on this socket).
|
|
* - Jean II */
|
|
static inline void irlmp_listen(struct lsap_cb *self)
|
|
{
|
|
self->dlsap_sel = LSAP_ANY;
|
|
self->lap = NULL;
|
|
self->lsap_state = LSAP_DISCONNECTED;
|
|
/* Started when we received the LM_CONNECT_INDICATION */
|
|
del_timer(&self->watchdog_timer);
|
|
}
|
|
|
|
#endif
|