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