/*********************************************************************
*
* Filename: irlmp.c
* Version: 0.8
* 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: Mon Dec 14 11:54:08 1998
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998 Dag Brattli <dagb@cs.uit.no>,
* All Rights Reserved.
*
* 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.
*
********************************************************************/
#include <linux/config.h>
#include <linux/malloc.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include <net/irda/irmod.h>
#include <net/irda/timer.h>
#include <net/irda/qos.h>
#include <net/irda/irlap.h>
#include <net/irda/iriap.h>
#include <net/irda/irlmp.h>
#include <net/irda/irlmp_frame.h>
#include <linux/kmod.h>
/* Master structure */
struct irlmp_cb *irlmp = NULL;
int sysctl_discovery = 0;
char sysctl_devname[65];
__u8 *irlmp_hint_to_service( __u8 *hint);
#ifdef CONFIG_PROC_FS
int irlmp_proc_read( char *buf, char **start, off_t offset, int len,
int unused);
#endif
/*
* Function irlmp_init (void)
*
* Create (allocate) the main IrLMP structure and the pointer array
* which will contain pointers to each instance of a LSAP.
*/
__initfunc(int irlmp_init(void))
{
DEBUG( 4, "--> irlmp_init\n");
/* Initialize the irlmp structure. */
if ( irlmp == NULL) {
irlmp = kmalloc( sizeof(struct irlmp_cb), GFP_KERNEL);
if ( irlmp == NULL)
return -ENOMEM;
}
memset( irlmp, 0, sizeof(struct irlmp_cb));
irlmp->magic = LMP_MAGIC;
irlmp->registry = hashbin_new( HB_LOCAL);
irlmp->links = hashbin_new( HB_LOCAL);
irlmp->unconnected_lsaps = hashbin_new( HB_GLOBAL);
irlmp->free_lsap_sel = 0x10; /* Servers use 0x00-0x0f */
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
irlmp->cache.valid = FALSE;
#endif
strcpy( sysctl_devname, "Linux");
/* Do discovery every 3 seconds */
init_timer( &irlmp->discovery_timer);
irlmp_start_discovery_timer( irlmp, 600);
return 0;
}
/*
* Function irlmp_cleanup (void)
*
* Remove IrLMP layer
*
*/
void irlmp_cleanup(void)
{
/* Check for main structure */
ASSERT( irlmp != NULL, return;);
ASSERT( irlmp->magic == LMP_MAGIC, return;);
del_timer( &irlmp->discovery_timer);
/* FIXME, we need a special function to deallocate LAPs */
hashbin_delete( irlmp->links, (FREE_FUNC) kfree);
hashbin_delete( irlmp->unconnected_lsaps, (FREE_FUNC) kfree);
hashbin_delete( irlmp->registry, (FREE_FUNC) kfree);
/* De-allocate main structure */
kfree( irlmp);
irlmp = NULL;
}
/*
* Function irlmp_open_lsap (slsap, notify)
*
* Register with IrLMP and create a local LSAP,
* returns handle to LSAP.
*/
struct lsap_cb *irlmp_open_lsap( __u8 slsap_sel, struct notify_t *notify)
{
struct lsap_cb *self;
ASSERT( notify != NULL, return NULL;);
ASSERT( irlmp != NULL, return NULL;);
ASSERT( irlmp->magic == LMP_MAGIC, return NULL;);
DEBUG( 4, "irlmp_open_lsap(), slsap_sel=%02x\n", slsap_sel);
/*
* Does the client care which Source LSAP selector it gets?
*/
if ( slsap_sel == LSAP_ANY) {
/*
* Find unused LSAP
*/
slsap_sel = irlmp_find_free_slsap();
if ( slsap_sel == 0)
return NULL;
} else {
/*
* Client wants specific LSAP, so check if it's already
* in use
*/
if ( irlmp_slsap_inuse( slsap_sel)) {
return NULL;
}
if ( slsap_sel > irlmp->free_lsap_sel)
irlmp->free_lsap_sel = slsap_sel+1;
}
/*
* Allocate new instance of a LSAP connection
*/
self = kmalloc( sizeof(struct lsap_cb), GFP_ATOMIC);
if ( self == NULL) {
printk( KERN_ERR "IrLMP: Can't allocate memory for "
"LSAP control block!\n");
return NULL;
}
memset( self, 0, sizeof(struct lsap_cb));
self->magic = LMP_LSAP_MAGIC;
self->slsap_sel = slsap_sel;
self->dlsap_sel = LSAP_ANY;
init_timer( &self->watchdog_timer);
ASSERT( notify->instance != NULL, return NULL;);
self->notify = *notify;
irlmp_next_lsap_state( self, LSAP_DISCONNECTED);
/*
* Insert into queue of unconnected LSAPs
*/
hashbin_insert( irlmp->unconnected_lsaps, (QUEUE *) self,
self->slsap_sel, NULL);
return self;
}
/*
* Function irlmp_close_lsap (self)
*
* Remove an instance of a LSAP
*/
static void __irlmp_close_lsap( struct lsap_cb *self)
{
DEBUG( 4, "irlmp_close()\n");
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
/*
* Set some of the variables to preset values
*/
self->magic = ~LMP_LSAP_MAGIC;
del_timer( &self->watchdog_timer); /* Important! */
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
ASSERT( irlmp != NULL, return;);
irlmp->cache.valid = FALSE;
#endif
/*
* Deallocate structure
*/
kfree( self);
DEBUG( 4, "irlmp_close() -->\n");
}
/*
* Function irlmp_close_lsap (self)
*
*
*
*/
void irlmp_close_lsap( struct lsap_cb *self)
{
struct lap_cb *lap;
struct lsap_cb *lsap;
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
lap = self->lap;
/*
* Find out if we should remove this LSAP from a link or from the
* list of unconnected lsaps (not associated with a link)
*/
if ( lap == NULL) {
lsap = hashbin_remove( irlmp->unconnected_lsaps,
self->slsap_sel, NULL);
} else {
ASSERT( lap != NULL, return;);
ASSERT( lap->magic == LMP_LAP_MAGIC, return;);
lsap = hashbin_remove( lap->lsaps, self->slsap_sel, NULL);
}
if ( lsap == NULL) {
DEBUG( 0, __FUNCTION__
"(), Looks like somebody has removed me already!\n");
return;
}
ASSERT( lsap == self, return;);
__irlmp_close_lsap( self);
}
/*
* Function irlmp_register_irlap (saddr, notify)
*
* Register IrLAP layer with IrLMP. There is possible to have multiple
* instances of the IrLAP layer, each connected to different IrDA ports
*
*/
void irlmp_register_irlap( struct irlap_cb *irlap, __u32 saddr,
struct notify_t *notify)
{
struct lap_cb *lap;
DEBUG( 4, __FUNCTION__ "(), Registered IrLAP, saddr = %08x\n",
saddr);
ASSERT( irlmp != NULL, return;);
ASSERT( irlmp->magic == LMP_MAGIC, return;);
ASSERT( notify != NULL, return;);
/*
* Allocate new instance of a LSAP connection
*/
lap = kmalloc( sizeof(struct lap_cb), GFP_KERNEL);
if ( lap == NULL) {
printk( KERN_ERR "IrLMP: Can't allocate memory for "
"LAP control block!\n");
return;
}
memset( lap, 0, sizeof(struct lap_cb));
lap->irlap = irlap;
lap->magic = LMP_LAP_MAGIC;
lap->saddr = saddr;
lap->lsaps = hashbin_new( HB_GLOBAL);
lap->cachelog = hashbin_new( HB_LOCAL);
irlmp_next_lap_state( lap, LAP_STANDBY);
/*
* Insert into queue of unconnected LSAPs
*/
hashbin_insert( irlmp->links, (QUEUE *) lap, lap->saddr, NULL);
/*
* We set only this variable so IrLAP can tell us on which link the
* different events happened on
*/
irda_notify_init( notify);
notify->instance = lap;
}
/*
* Function irlmp_unregister_irlap (saddr)
*
* IrLAP layer has been removed!
*
*/
void irlmp_unregister_irlap( __u32 saddr)
{
struct lap_cb *self;
DEBUG( 4, __FUNCTION__ "()\n");
self = hashbin_remove( irlmp->links, saddr, NULL);
if ( self != NULL) {
ASSERT( self->magic == LMP_LAP_MAGIC, return;);
self->magic = ~LMP_LAP_MAGIC;
kfree( self);
} else {
DEBUG( 0, "irlmp_unregister_irlap(), Didn't find LAP!\n");
}
}
void dump_discoveries( hashbin_t *log)
{
DISCOVERY *d;
ASSERT( log != NULL, return;);
d = (DISCOVERY *) hashbin_get_first( log);
while( d != NULL) {
DEBUG( 0, "Discovery:\n");
DEBUG( 0, " daddr=%08x\n", d->daddr);
DEBUG( 0, " name=%s\n", d->info);
d = (DISCOVERY *) hashbin_get_next( log);
}
}
/*
* Function irlmp_connect_request (handle, dlsap, userdata)
*
* Connect with a peer LSAP
*
*/
void irlmp_connect_request( struct lsap_cb *self, __u8 dlsap_sel, __u32 daddr,
struct qos_info *qos, struct sk_buff *userdata)
{
struct sk_buff *skb = NULL;
struct lap_cb *lap;
struct lsap_cb *lsap;
unsigned long flags;
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
DEBUG( 4, "irlmp_connect_request(), "
"slsap_sel=%02x, dlsap_sel=%02x, daddr=%08x\n",
self->slsap_sel, dlsap_sel, daddr);
if ( self->connected) {
DEBUG( 0, __FUNCTION__ "(), Error: already connected!!\n");
return;
}
/* Any userdata? */
if ( userdata == NULL) {
skb = dev_alloc_skb( 64);
if (skb == NULL) {
DEBUG( 0, "irlmp_connect_request: "
"Could not allocate an sk_buff of length %d\n",
64);
return;
}
skb_reserve( skb, LMP_CONTROL_HEADER+LAP_HEADER);
} else
skb = userdata;
/* Make room for MUX control header ( 3 bytes) */
ASSERT( skb_headroom( skb) >= LMP_CONTROL_HEADER, return;);
skb_push( skb, LMP_CONTROL_HEADER);
self->dlsap_sel = dlsap_sel;
self->tmp_skb = skb;
/*
* Find out which link to connect on, and make sure nothing strange
* happens while we traverse the list
*/
save_flags( flags);
cli();
lap = (struct lap_cb *) hashbin_get_first( irlmp->links);
while ( lap != NULL) {
ASSERT( lap->magic == LMP_LAP_MAGIC, return;);
/* dump_discoveries( lap->cachelog); */
if ( hashbin_find( lap->cachelog, daddr, NULL)) {
DEBUG( 4, "irlmp_connect_request() found link to connect on!\n");
self->lap = lap;
break;
}
lap = (struct lap_cb *) hashbin_get_next( irlmp->links);
}
restore_flags(flags);
/*
* Remove LSAP from list of unconnected LSAPs and insert it into the
* list of connected LSAPs for the particular link */
lsap = hashbin_remove( irlmp->unconnected_lsaps, self->slsap_sel,
NULL);
/* Check if we found a link to connect on */
if ( self->lap == NULL) {
DEBUG( 0, __FUNCTION__ "(), Unable to find a usable link!\n");
return;
}
ASSERT( lsap != NULL, return;);
ASSERT( lsap->magic == LMP_LSAP_MAGIC, return;);
ASSERT( lsap->lap != NULL, return;);
ASSERT( lsap->lap->magic == LMP_LAP_MAGIC, return;);
hashbin_insert( self->lap->lsaps, (QUEUE *) self, self->slsap_sel,
NULL);
self->connected = TRUE;
/*
* User supplied qos specifications?
*/
if ( qos)
self->qos = *qos;
DEBUG( 4, "*** Connecting SLSAP=%02x, DLSAP= %02x\n",
self->slsap_sel, self->dlsap_sel);
irlmp_do_lsap_event( self, LM_CONNECT_REQUEST, skb);
}
/*
* Function irlmp_connect_indication (self)
*
* Incomming connection
*
*/
void irlmp_connect_indication( struct lsap_cb *self, struct sk_buff *skb)
{
int max_seg_size;
DEBUG( 4, "irlmp_connect_indication()\n");
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
ASSERT( skb != NULL, return;);
ASSERT( self->lap != NULL, return;);
self->qos = *self->lap->qos;
max_seg_size = self->lap->qos->data_size.value;
DEBUG( 4, __FUNCTION__ "(), max_seg_size=%d\n", max_seg_size);
/* Hide LMP_CONTROL_HEADER header from layer above */
skb_pull( skb, LMP_CONTROL_HEADER);
if ( self->notify.connect_indication)
self->notify.connect_indication( self->notify.instance, self,
&self->qos, max_seg_size,
skb);
}
/*
* Function irlmp_connect_response (handle, userdata)
*
* Service user is accepting connection
*
*/
void irlmp_connect_response( struct lsap_cb *self, struct sk_buff *userdata)
{
DEBUG( 4, "irlmp_connect_response()\n");
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
ASSERT( userdata != NULL, return;);
self->connected = TRUE;
DEBUG( 4, "irlmp_connect_response: slsap_sel=%02x, dlsap_sel=%02x\n",
self->slsap_sel, self->dlsap_sel);
/* Make room for MUX control header ( 3 bytes) */
ASSERT( skb_headroom( userdata) >= LMP_CONTROL_HEADER, return;);
skb_push( userdata, LMP_CONTROL_HEADER);
irlmp_do_lsap_event( self, LM_CONNECT_RESPONSE, userdata);
}
/*
* Function irlmp_connect_confirm (handle, skb)
*
* LSAP connection confirmed peer device!
*/
void irlmp_connect_confirm( struct lsap_cb *self, struct sk_buff *skb)
{
int max_seg_size;
DEBUG( 4, __FUNCTION__ "()\n");
ASSERT( skb != NULL, return;);
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
ASSERT( self->lap != NULL, return;);
self->qos = *self->lap->qos;
max_seg_size = self->qos.data_size.value;
DEBUG( 4, __FUNCTION__ "(), max_seg_size=%d\n", max_seg_size);
/* Hide LMP_CONTROL_HEADER header from layer above */
skb_pull( skb, LMP_CONTROL_HEADER);
if ( self->notify.connect_confirm) {
self->notify.connect_confirm( self->notify.instance, self,
&self->qos, max_seg_size, skb);
}
}
/*
* Function irlmp_disconnect_request (handle, userdata)
*
* The service user is requesting disconnection, this will not remove the
* LSAP, but only mark it as disconnected
*/
void irlmp_disconnect_request( struct lsap_cb *self, struct sk_buff *userdata)
{
struct lsap_cb *lsap;
DEBUG( 4, "irlmp_disconnect_request()\n");
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
/* Already disconnected? */
if ( !self->connected) {
DEBUG( 0, __FUNCTION__ "(), already disconnected!\n");
return;
}
ASSERT( userdata != NULL, return;);
ASSERT( self->connected == TRUE, return;);
skb_push( userdata, LMP_CONTROL_HEADER);
/*
* Do the event before the other stuff since we must know
* which lap layer that the frame should be transmitted on
*/
irlmp_do_lsap_event( self, LM_DISCONNECT_REQUEST, userdata);
/*
* Remove LSAP from list of connected LSAPs for the particular link
* and insert it into the list of unconnected LSAPs
*/
ASSERT( self->lap != NULL, return;);
ASSERT( self->lap->magic == LMP_LAP_MAGIC, return;);
ASSERT( self->lap->lsaps != NULL, return;);
lsap = hashbin_remove( self->lap->lsaps, self->slsap_sel, NULL);
ASSERT( lsap != NULL, return;);
ASSERT( lsap->magic == LMP_LSAP_MAGIC, return;);
ASSERT( lsap == self, return;);
hashbin_insert( irlmp->unconnected_lsaps, (QUEUE *) self,
self->slsap_sel, NULL);
/* Reset some values */
self->connected = FALSE;
self->dlsap_sel = LSAP_ANY;
self->lap = NULL;
}
/*
* Function irlmp_disconnect_indication (reason, userdata)
*
* LSAP is being closed!
*/
void irlmp_disconnect_indication( struct lsap_cb *self, LM_REASON reason,
struct sk_buff *userdata)
{
struct lsap_cb *lsap;
DEBUG( 4, "irlmp_disconnect_indication()\n");
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
ASSERT( self->connected == TRUE, return;);
DEBUG( 4, __FUNCTION__ "(), slsap_sel=%02x, dlsap_sel=%02x\n",
self->slsap_sel, self->dlsap_sel);
self->connected = FALSE;
self->dlsap_sel = LSAP_ANY;
/*
* Remove assosiation betwen this LSAP and the kink it used
*/
ASSERT( self->lap != NULL, return;);
ASSERT( self->lap->lsaps != NULL, return;);
lsap = hashbin_remove( self->lap->lsaps, self->slsap_sel, NULL);
ASSERT( lsap != NULL, return;);
ASSERT( lsap == self, return;);
hashbin_insert( irlmp->unconnected_lsaps, (QUEUE *) lsap,
lsap->slsap_sel, NULL);
self->lap = NULL;
/* FIXME: the reasons should be extracted somewhere else? */
if ( userdata) {
DEBUG( 4, "irlmp_disconnect_indication: reason=%02x\n",
userdata->data[3]);
}
/*
* Inform service user
*/
if ( self->notify.disconnect_indication) {
self->notify.disconnect_indication( self->notify.instance,
self, reason, userdata);
}
}
/*
* Function irlmp_discovery_request (nslots)
*
* Do a discovery of devices in front of the computer
*
*/
void irlmp_discovery_request( int nslots)
{
struct lap_cb *lap;
DEBUG( 4, "irlmp_discovery_request()\n");
ASSERT( irlmp != NULL, return;);
if ( !sysctl_discovery)
return;
/*
* Construct new discovery info to be used by IrLAP,
* TODO: no need to do this every time!
*/
irlmp->discovery_cmd.hint[0] = irlmp->hint[0];
irlmp->discovery_cmd.hint[1] = irlmp->hint[1];
/*
* Set character set for device name (we use ASCII), and
* copy device name. Remember to make room for a \0 at the
* end
*/
irlmp->discovery_cmd.charset = CS_ASCII;
strncpy( irlmp->discovery_cmd.info, sysctl_devname, 31);
irlmp->discovery_cmd.info_len = strlen( irlmp->discovery_cmd.info);
/*
* Try to send discovery packets on all links
*/
lap = ( struct lap_cb *) hashbin_get_first( irlmp->links);
while ( lap != NULL) {
ASSERT( lap->magic == LMP_LAP_MAGIC, return;);
DEBUG( 4, "irlmp_discovery_request() sending request!\n");
irlmp_do_lap_event( lap, LM_LAP_DISCOVERY_REQUEST, NULL);
lap = ( struct lap_cb *) hashbin_get_next( irlmp->links);
}
}
/*
* Function irlmp_check_services (discovery)
*
*
*
*/
void irlmp_check_services( DISCOVERY *discovery)
{
struct irlmp_registration *entry;
struct irmanager_event event;
__u8 *service;
int i = 0;
printk( KERN_INFO "IrDA Discovered: %s\n", discovery->info);
printk( KERN_INFO " Services: ");
service = irlmp_hint_to_service( discovery->hint);
if (service != NULL) {
/*
* Check all services on the device
*/
while ( service[i] != S_END) {
DEBUG( 4, "service=%02x\n", service[i]);
entry = hashbin_find( irlmp->registry,
service[i], NULL);
if ( entry && entry->discovery_callback) {
DEBUG( 4, "discovery_callback!\n");
entry->discovery_callback( discovery);
} else {
/*
* Found no clients for dealing with this
* service, so ask the user space irmanager
* to try to load the right module for us
*/
event.event = EVENT_DEVICE_DISCOVERED;
event.service = service[i];
event.daddr = discovery->daddr;
sprintf( event.info, "%s",
discovery->info);
irmanager_notify( &event);
}
i++; /* Next service */
}
kfree( service);
}
}
/*
* Function irlmp_discovery_confirm ( self, log)
*
* Some device(s) answered to our discovery request! Check to see which
* device it is, and give indication to the client(s)
*
*/
void irlmp_discovery_confirm( struct lap_cb *self, hashbin_t *log)
{
DISCOVERY *discovery;
DEBUG( 4, "irlmp_discovery_confirm()\n");
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LAP_MAGIC, return;);
/*
* If log is missing this means that IrLAP was unable to perform the
* discovery, so restart discovery again with just the half timeout
* of the normal one.
*/
if ( !log) {
irlmp_start_discovery_timer( irlmp, 150);
return;
}
/*
* Now, check all discovered devices (if any)
*/
discovery = ( DISCOVERY *) hashbin_get_first( log);
while ( discovery != NULL) {
self->daddr = discovery->daddr;
DEBUG( 4, "discovery->daddr = 0x%08x\n", discovery->daddr);
irlmp_check_services( discovery);
discovery = ( DISCOVERY *) hashbin_get_next( log);
}
}
/*
* Function irlmp_discovery_indication (discovery)
*
* A remote device is discovering us!
*
*/
void irlmp_discovery_indication( struct lap_cb *self, DISCOVERY *discovery)
{
/* struct irda_event event; */
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LAP_MAGIC, return;);
ASSERT( discovery != NULL, return;);
DEBUG( 4, __FUNCTION__ "()\n");
DEBUG( 4, "discovery->daddr = 0x%08x\n", discovery->daddr);
self->daddr = discovery->daddr;
/*
* Create a new discovery log if neccessary
*/
if ( self->cachelog == NULL)
self->cachelog = hashbin_new( HB_LOCAL);
/*
* Insert this discovery device into the discovery_log if its
* not there already
*/
if ( !hashbin_find( self->cachelog, discovery->daddr, NULL))
hashbin_insert( self->cachelog, (QUEUE *) discovery,
discovery->daddr, NULL);
irlmp_check_services( discovery);
}
/*
* Function irlmp_get_discovery_response ()
*
* Used by IrLAP to get the disocvery info it needs when answering
* discovery requests by other devices.
*/
DISCOVERY *irlmp_get_discovery_response()
{
DEBUG( 4, "irlmp_get_discovery_response()\n");
ASSERT( irlmp != NULL, return NULL;);
irlmp->discovery_rsp.hint[0] = irlmp->hint[0];
irlmp->discovery_rsp.hint[1] = irlmp->hint[1];
/*
* Set character set for device name (we use ASCII), and
* copy device name. Remember to make room for a \0 at the
* end
*/
irlmp->discovery_rsp.charset = CS_ASCII;
strncpy( irlmp->discovery_rsp.info, sysctl_devname, 31);
irlmp->discovery_rsp.info_len = strlen( irlmp->discovery_rsp.info) + 2;
return &irlmp->discovery_rsp;
}
/*
* Function irlmp_data_request (self, skb)
*
* Send some data to peer device
*
*/
void irlmp_data_request( struct lsap_cb *self, struct sk_buff *skb)
{
DEBUG( 4, __FUNCTION__ "()\n");
ASSERT( skb != NULL, return;);
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
/* Make room for MUX header */
ASSERT( skb_headroom( skb) >= LMP_HEADER, return;);
skb_push( skb, LMP_HEADER);
irlmp_do_lsap_event( self, LM_DATA_REQUEST, skb);
}
/*
* Function irlmp_data_indication (handle, skb)
*
* Got data from LAP layer so pass it up to upper layer
*
*/
void irlmp_data_indication( struct lsap_cb *self, struct sk_buff *skb)
{
DEBUG( 4, "irlmp_data_indication()\n");
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
ASSERT( skb != NULL, return;);
/* Hide LMP header from layer above */
skb_pull( skb, LMP_HEADER);
if ( self->notify.data_indication)
self->notify.data_indication(self->notify.instance, self, skb);
}
/*
* Function irlmp_udata_request (self, skb)
*
*
*
*/
void irlmp_udata_request( struct lsap_cb *self, struct sk_buff *skb)
{
DEBUG( 4, __FUNCTION__ "()\n");
ASSERT( skb != NULL, return;);
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
/* Make room for MUX header */
ASSERT( skb_headroom( skb) >= LMP_HEADER, return;);
skb_push( skb, LMP_HEADER);
irlmp_do_lsap_event( self, LM_UDATA_REQUEST, skb);
}
/*
* Function irlmp_udata_indication (self, skb)
*
* Send unreliable data (but still within the connection)
*
*/
void irlmp_udata_indication( struct lsap_cb *self, struct sk_buff *skb)
{
DEBUG( 4, __FUNCTION__ "()\n");
ASSERT( self != NULL, return;);
ASSERT( self->magic == LMP_LSAP_MAGIC, return;);
ASSERT( skb != NULL, return;);
/* Hide LMP header from layer above */
skb_pull( skb, LMP_HEADER);
if ( self->notify.udata_indication)
self->notify.udata_indication( self->notify.instance, self,
skb);
}
/*
* Function irlmp_connection_less_data_request (skb)
*
* Send out of connection UI frames
*
*/
void irlmp_connectionless_data_request( struct sk_buff *skb)
{
DEBUG( 0, __FUNCTION__ "()\n");
}
/*
* Function irlmp_connection_less_data_indication (skb)
*
*
*
*/
void irlmp_connectionless_data_indication( struct sk_buff *skb)
{
DEBUG( 0, __FUNCTION__ "()\n");
}
void irlmp_status_request(void)
{
DEBUG( 0, "irlmp_status_request(), Not implemented\n");
}
void irlmp_status_indication( LINK_STATUS link, LOCK_STATUS lock)
{
DEBUG( 4, "irlmp_status_indication(), Not implemented\n");
}
/*
* Function irlmp_hint_to_service (hint)
*
* Returns a list of all servics contained in the given hint bits. This
* funtion assumes that the hint bits have the size of two bytes only
*/
__u8 *irlmp_hint_to_service( __u8 *hint)
{
__u8 *service;
int i = 0;
/* Allocate array to store services in */
service = kmalloc( 16, GFP_ATOMIC);
if ( !service) {
DEBUG( 0, "irlmp_hint_to_service: Unable to kmalloc!\n");
return NULL;
}
if ( !hint[0]) {
printk( "<None>\n");
return NULL;
}
if ( hint[0] & HINT_PNP)
printk( "PnP Compatible ");
if ( hint[0] & HINT_PDA)
printk( "PDA/Palmtop ");
if ( hint[0] & HINT_COMPUTER)
printk( "Computer ");
if ( hint[0] & HINT_PRINTER) {
printk( "Printer\n");
service[i++] = S_PRINTER;
}
if ( hint[0] & HINT_MODEM)
printk( "Modem ");
if ( hint[0] & HINT_FAX)
printk( "Fax ");
if ( hint[0] & HINT_LAN) {
printk( "LAN Access\n");
service[i++] = S_LAN;
}
/*
* Test if extension byte exists. This byte will usually be
* there, but this is not really required by the standard.
* (IrLMP p. 29)
*/
if ( hint[0] & HINT_EXTENSION) {
if ( hint[1] & HINT_TELEPHONY)
printk( "Telephony ");
if ( hint[1] & HINT_FILE_SERVER)
printk( "File Server ");
if ( hint[1] & HINT_COMM) {
printk( "IrCOMM ");
service[i++] = S_COMM;
}
if ( hint[1] & HINT_OBEX) {
printk( "IrOBEX ");
service[i++] = S_OBEX;
}
}
printk( "\n");
service[i] = S_END;
return service;
}
/*
* Function irlmp_service_to_hint (service, hint)
*
*
*
*/
void irlmp_service_to_hint( int service, __u8 *hint)
{
switch (service) {
case S_PNP:
hint[0] |= HINT_PNP;
break;
case S_PDA:
hint[0] |= HINT_PDA;
break;
case S_COMPUTER:
hint[0] |= HINT_COMPUTER;
break;
case S_PRINTER:
hint[0] |= HINT_PRINTER;
break;
case S_MODEM:
hint[0] |= HINT_PRINTER;
break;
case S_LAN:
hint[0] |= HINT_LAN;
break;
case S_COMM:
hint[0] |= HINT_EXTENSION;
hint[1] |= HINT_COMM;
break;
case S_OBEX:
hint[0] |= HINT_EXTENSION;
hint[1] |= HINT_OBEX;
break;
default:
DEBUG( 0, "irlmp_service_to_hint(), Unknown service!\n");
break;
}
}
/*
* Function irlmp_register (service, type, callback)
*
* Register a local client or server with IrLMP
*
*/
void irlmp_register_layer( int service, int type, int do_discovery,
DISCOVERY_CALLBACK callback)
{
struct irlmp_registration *entry;
sysctl_discovery |= do_discovery;
if ( type & SERVER)
irlmp_service_to_hint( service, irlmp->hint);
/* Check if this service has been registred before */
entry = hashbin_find( irlmp->registry, service, NULL);
if ( entry != NULL) {
/* Update type in entry */
entry->type |= type;
/* Update callback only if client, since servers don't
* use callbacks, and we don't want to overwrite a
* previous registred client callback
*/
if ( type & CLIENT)
entry->discovery_callback = callback;
return;
}
/* Make a new registration */
entry = kmalloc( sizeof( struct irlmp_registration), GFP_ATOMIC);
if ( !entry) {
DEBUG( 0, "irlmp_register(), Unable to kmalloc!\n");
return;
}
entry->service = service;
entry->type = type;
entry->discovery_callback = callback;
hashbin_insert( irlmp->registry, (QUEUE*) entry, entry->service, NULL);
}
/*
* Function irlmp_unregister (serivice)
*
*
*
*/
void irlmp_unregister_layer( int service, int type)
{
struct irlmp_registration *entry;
DEBUG( 4, __FUNCTION__ "()\n");
entry = hashbin_find( irlmp->registry, service, NULL);
if ( entry != NULL) {
DEBUG( 4, "Found entry to change or remove!\n");
/* Remove this type from the service registration */
entry->type &= ~type;
}
if ( !entry) {
DEBUG( 0, "Unable to find entry to unregister!\n");
return;
}
/*
* Remove entry if there is no more client and server support
* left in entry
*/
if ( !entry->type) {
DEBUG( 4, __FUNCTION__ "(), removing entry!\n");
entry = hashbin_remove( irlmp->registry, service, NULL);
if ( entry != NULL)
kfree( entry);
}
/* Remove old hint bits */
irlmp->hint[0] = 0;
irlmp->hint[1] = 0;
/* Refresh current hint bits */
entry = (struct irlmp_registration *) hashbin_get_first( irlmp->registry);
while( entry != NULL) {
if ( entry->type & SERVER)
irlmp_service_to_hint( entry->service,
irlmp->hint);
entry = (struct irlmp_registration *)
hashbin_get_next( irlmp->registry);
}
}
/*
* Function irlmp_slsap_inuse (slsap)
*
* Check if the given source LSAP selector is in use
*/
int irlmp_slsap_inuse( __u8 slsap_sel)
{
struct lsap_cb *self;
struct lap_cb *lap;
ASSERT( irlmp != NULL, return TRUE;);
ASSERT( irlmp->magic == LMP_MAGIC, return TRUE;);
ASSERT( slsap_sel != LSAP_ANY, return TRUE;);
DEBUG( 4, "irlmp_slsap_inuse()\n");
/*
* Check if slsap is already in use. To do this we have to loop over
* every IrLAP connection and check every LSAP assosiated with each
* the connection.
*/
lap = ( struct lap_cb *) hashbin_get_first( irlmp->links);
while ( lap != NULL) {
ASSERT( lap->magic == LMP_LAP_MAGIC, return TRUE;);
self = (struct lsap_cb *) hashbin_get_first( lap->lsaps);
while ( self != NULL) {
ASSERT( self->magic == LMP_LSAP_MAGIC, return TRUE;);
if (( self->slsap_sel == slsap_sel))/* && */
/* ( self->dlsap_sel == LSAP_ANY)) */
{
DEBUG( 4, "Source LSAP selector=%02x in use\n",
self->slsap_sel);
return TRUE;
}
self = (struct lsap_cb*) hashbin_get_next( lap->lsaps);
}
lap = (struct lap_cb *) hashbin_get_next( irlmp->links);
}
return FALSE;
}
/*
* Function irlmp_find_free_slsap ()
*
* Find a free source LSAP to use. This function is called if the service
* user has requested a source LSAP equal to LM_ANY
*/
__u8 irlmp_find_free_slsap(void)
{
__u8 lsap_sel;
ASSERT( irlmp != NULL, return -1;);
ASSERT( irlmp->magic == LMP_MAGIC, return -1;);
lsap_sel = irlmp->free_lsap_sel++;
DEBUG( 4, "irlmp_find_free_slsap(), picked next free lsap_sel=%02x\n",
lsap_sel);
return lsap_sel;
}
/*
* Function irlmp_convert_lap_reason (lap_reason)
*
* Converts IrLAP disconnect reason codes to IrLMP disconnect reason
* codes
*
*/
LM_REASON irlmp_convert_lap_reason( LAP_REASON lap_reason)
{
int reason = LM_LAP_DISCONNECT;
switch (lap_reason) {
case LAP_DISC_INDICATION: /* Received a disconnect request from peer */
reason = LM_USER_REQUEST;
break;
case LAP_NO_RESPONSE: /* To many retransmits without response */
reason = LM_LAP_DISCONNECT;
break;
case LAP_RESET_INDICATION:
reason = LM_LAP_RESET;
break;
case LAP_FOUND_NONE:
case LAP_MEDIA_BUSY:
case LAP_PRIMARY_CONFLICT:
reason = LM_CONNECT_FAILURE;
break;
default:
DEBUG( 0, __FUNCTION__
"(), Unknow IrLAP disconnect reason %d!\n", lap_reason);
reason = LM_LAP_DISCONNECT;
break;
}
return reason;
}
#ifdef CONFIG_PROC_FS
/*
* Function irlmp_proc_read (buf, start, offset, len, unused)
*
* Give some info to the /proc file system
*
*/
int irlmp_proc_read( char *buf, char **start, off_t offset, int len,
int unused)
{
struct lsap_cb *self;
struct lap_cb *lap;
unsigned long flags;
ASSERT( irlmp != NULL, return 0;);
save_flags( flags);
cli();
len = 0;
len += sprintf( buf+len, "Unconnected LSAPs:\n");
self = (struct lsap_cb *) hashbin_get_first( irlmp->unconnected_lsaps);
while ( self != NULL) {
ASSERT( self->magic == LMP_LSAP_MAGIC, return 0;);
len += sprintf( buf+len, "lsap state: %s, ",
irlsap_state[ self->lsap_state]);
len += sprintf( buf+len,
"slsap_sel: %#02x, dlsap_sel: %#02x, ",
self->slsap_sel, self->dlsap_sel);
len += sprintf( buf+len, "(%s)", self->notify.name);
len += sprintf( buf+len, "\n");
self = ( struct lsap_cb *) hashbin_get_next(
irlmp->unconnected_lsaps);
}
len += sprintf( buf+len, "\nRegistred Link Layers:\n");
lap = (struct lap_cb *) hashbin_get_first( irlmp->links);
while ( lap != NULL) {
ASSERT( lap->magic == LMP_LAP_MAGIC, return 0;);
len += sprintf( buf+len, "lap state: %s, ",
irlmp_state[ lap->lap_state]);
len += sprintf( buf+len,
"saddr: %#08x, daddr: %#08x, ",
lap->saddr, lap->daddr);
len += sprintf( buf+len, "\n");
len += sprintf( buf+len, "\nConnected LSAPs:\n");
self = (struct lsap_cb *) hashbin_get_first( lap->lsaps);
while ( self != NULL) {
ASSERT( self->magic == LMP_LSAP_MAGIC, return 0;);
len += sprintf( buf+len, "lsap state: %s, ",
irlsap_state[ self->lsap_state]);
len += sprintf( buf+len,
"slsap_sel: %#02x, dlsap_sel: %#02x, ",
self->slsap_sel, self->dlsap_sel);
len += sprintf( buf+len, "(%s)", self->notify.name);
len += sprintf( buf+len, "\n");
self = ( struct lsap_cb *) hashbin_get_next(
lap->lsaps);
}
lap = ( struct lap_cb *) hashbin_get_next(
irlmp->links);
}
restore_flags( flags);
return len;
}
#endif /* PROC_FS */