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Diffstat (limited to 'include/net/irda/irlmp.h')
| -rw-r--r-- | include/net/irda/irlmp.h | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/include/net/irda/irlmp.h b/include/net/irda/irlmp.h new file mode 100644 index 00000000000..86aefb1fda5 --- /dev/null +++ b/include/net/irda/irlmp.h @@ -0,0 +1,295 @@ +/********************************************************************* + * + * 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 Tromsų 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/config.h> +#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 +#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; + + IRLMP_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 registred 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 |