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/*********************************************************************
*
* Filename: irlmp.c
* Version: 1.0
* Description: IrDA Link Management Protocol (LMP) layer
* Status: Stable.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Sun Aug 17 20:54:32 1997
* Modified at: Wed Jan 5 11:26:03 2000
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>,
* All Rights Reserved.
* Copyright (c) 2000-2001 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.
*
********************************************************************/
#include <linux/config.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/kmod.h>
#include <linux/random.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>
/* Master structure */
struct irlmp_cb *irlmp = NULL;
/* These can be altered by the sysctl interface */
int sysctl_discovery = 0;
int sysctl_discovery_timeout = 3; /* 3 seconds by default */
int sysctl_discovery_slots = 6; /* 6 slots by default */
int sysctl_lap_keepalive_time = LM_IDLE_TIMEOUT * 1000 / HZ;
char sysctl_devname[65];
char *lmp_reasons[] = {
"ERROR, NOT USED",
"LM_USER_REQUEST",
"LM_LAP_DISCONNECT",
"LM_CONNECT_FAILURE",
"LM_LAP_RESET",
"LM_INIT_DISCONNECT",
"ERROR, NOT USED",
};
__u8 *irlmp_hint_to_service(__u8 *hint);
#ifdef CONFIG_PROC_FS
int irlmp_proc_read(char *buf, char **start, off_t offst, int len);
#endif
/*
* Function irlmp_init (void)
*
* Create (allocate) the main IrLMP structure
*
*/
int __init irlmp_init(void)
{
IRDA_DEBUG(1, __FUNCTION__ "()\n");
/* Initialize the irlmp structure. */
irlmp = kmalloc( sizeof(struct irlmp_cb), GFP_KERNEL);
if (irlmp == NULL)
return -ENOMEM;
memset(irlmp, 0, sizeof(struct irlmp_cb));
irlmp->magic = LMP_MAGIC;
spin_lock_init(&irlmp->log_lock);
irlmp->clients = hashbin_new(HB_GLOBAL);
irlmp->services = hashbin_new(HB_GLOBAL);
irlmp->links = hashbin_new(HB_GLOBAL);
irlmp->unconnected_lsaps = hashbin_new(HB_GLOBAL);
irlmp->cachelog = hashbin_new(HB_GLOBAL);
irlmp->free_lsap_sel = 0x10; /* Reserved 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, sysctl_discovery_timeout*HZ);
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);
hashbin_delete(irlmp->links, (FREE_FUNC) kfree);
hashbin_delete(irlmp->unconnected_lsaps, (FREE_FUNC) kfree);
hashbin_delete(irlmp->clients, (FREE_FUNC) kfree);
hashbin_delete(irlmp->services, (FREE_FUNC) kfree);
hashbin_delete(irlmp->cachelog, (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, notify_t *notify, __u8 pid)
{
struct lsap_cb *self;
ASSERT(notify != NULL, return NULL;);
ASSERT(irlmp != NULL, return NULL;);
ASSERT(irlmp->magic == LMP_MAGIC, return NULL;);
/* Does the client care which Source LSAP selector it gets? */
if (slsap_sel == LSAP_ANY) {
slsap_sel = irlmp_find_free_slsap();
if (!slsap_sel)
return NULL;
} else if (irlmp_slsap_inuse(slsap_sel))
return NULL;
/* Allocate new instance of a LSAP connection */
self = kmalloc(sizeof(struct lsap_cb), GFP_ATOMIC);
if (self == NULL) {
ERROR(__FUNCTION__ "(), can't allocate memory");
return NULL;
}
memset(self, 0, sizeof(struct lsap_cb));
self->magic = LMP_LSAP_MAGIC;
self->slsap_sel = slsap_sel;
/* Fix connectionless LSAP's */
if (slsap_sel == LSAP_CONNLESS) {
#ifdef CONFIG_IRDA_ULTRA
self->dlsap_sel = LSAP_CONNLESS;
self->pid = pid;
#endif /* CONFIG_IRDA_ULTRA */
} else
self->dlsap_sel = LSAP_ANY;
/* self->connected = FALSE; -> already NULL via memset() */
init_timer(&self->watchdog_timer);
ASSERT(notify->instance != NULL, return NULL;);
self->notify = *notify;
self->lsap_state = LSAP_DISCONNECTED;
/* Insert into queue of unconnected LSAPs */
hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) self, (int) self,
NULL);
return self;
}
/*
* Function __irlmp_close_lsap (self)
*
* Remove an instance of LSAP
*/
static void __irlmp_close_lsap(struct lsap_cb *self)
{
IRDA_DEBUG(4, __FUNCTION__ "()\n");
ASSERT(self != NULL, return;);
ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
/*
* Set some of the variables to preset values
*/
self->magic = 0;
del_timer(&self->watchdog_timer); /* Important! */
if (self->conn_skb)
dev_kfree_skb(self->conn_skb);
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
ASSERT(irlmp != NULL, return;);
irlmp->cache.valid = FALSE;
#endif
kfree(self);
}
/*
* Function irlmp_close_lsap (self)
*
* Close and remove LSAP
*
*/
void irlmp_close_lsap(struct lsap_cb *self)
{
struct lap_cb *lap;
struct lsap_cb *lsap = NULL;
ASSERT(self != NULL, return;);
ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
/*
* Find out if we should remove this LSAP from a link or from the
* list of unconnected lsaps (not associated with a link)
*/
lap = self->lap;
if (lap) {
ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
lsap = hashbin_remove(lap->lsaps, (int) self, NULL);
}
self->lap = NULL;
/* Check if we found the LSAP! If not then try the unconnected lsaps */
if (!lsap) {
lsap = hashbin_remove(irlmp->unconnected_lsaps, (int) self,
NULL);
}
if (!lsap) {
IRDA_DEBUG(0, __FUNCTION__
"(), Looks like somebody has removed me already!\n");
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_link(struct irlap_cb *irlap, __u32 saddr, notify_t *notify)
{
struct lap_cb *lap;
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) {
ERROR(__FUNCTION__ "(), unable to kmalloc\n");
return;
}
memset(lap, 0, sizeof(struct lap_cb));
lap->irlap = irlap;
lap->magic = LMP_LAP_MAGIC;
lap->saddr = saddr;
lap->daddr = DEV_ADDR_ANY;
lap->lsaps = hashbin_new(HB_GLOBAL);
lap->lap_state = LAP_STANDBY;
init_timer(&lap->idle_timer);
/*
* Insert into queue of LMP links
*/
hashbin_insert(irlmp->links, (irda_queue_t *) 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_link(__u32 saddr)
{
struct lap_cb *link;
IRDA_DEBUG(4, __FUNCTION__ "()\n");
link = hashbin_remove(irlmp->links, saddr, NULL);
if (link) {
ASSERT(link->magic == LMP_LAP_MAGIC, return;);
/* Remove all discoveries discovered at this link */
irlmp_expire_discoveries(irlmp->cachelog, link->saddr, TRUE);
del_timer(&link->idle_timer);
link->magic = 0;
kfree(link);
}
}
/*
* Function irlmp_connect_request (handle, dlsap, userdata)
*
* Connect with a peer LSAP
*
*/
int irlmp_connect_request(struct lsap_cb *self, __u8 dlsap_sel,
__u32 saddr, __u32 daddr,
struct qos_info *qos, struct sk_buff *userdata)
{
struct sk_buff *skb = NULL;
struct lap_cb *lap;
struct lsap_cb *lsap;
discovery_t *discovery;
ASSERT(self != NULL, return -EBADR;);
ASSERT(self->magic == LMP_LSAP_MAGIC, return -EBADR;);
IRDA_DEBUG(2, __FUNCTION__
"(), slsap_sel=%02x, dlsap_sel=%02x, saddr=%08x, daddr=%08x\n",
self->slsap_sel, dlsap_sel, saddr, daddr);
if (test_bit(0, &self->connected))
return -EISCONN;
/* Client must supply destination device address */
if (!daddr)
return -EINVAL;
/* Any userdata? */
if (userdata == NULL) {
skb = dev_alloc_skb(64);
if (!skb)
return -ENOMEM;
skb_reserve(skb, LMP_MAX_HEADER);
} else
skb = userdata;
/* Make room for MUX control header (3 bytes) */
ASSERT(skb_headroom(skb) >= LMP_CONTROL_HEADER, return -1;);
skb_push(skb, LMP_CONTROL_HEADER);
self->dlsap_sel = dlsap_sel;
/*
* Find the link to where we should try to connect since there may
* be more than one IrDA port on this machine. If the client has
* passed us the saddr (and already knows which link to use), then
* we use that to find the link, if not then we have to look in the
* discovery log and check if any of the links has discovered a
* device with the given daddr
*/
if ((!saddr) || (saddr == DEV_ADDR_ANY)) {
if (daddr != DEV_ADDR_ANY)
discovery = hashbin_find(irlmp->cachelog, daddr, NULL);
else {
IRDA_DEBUG(2, __FUNCTION__ "(), no daddr\n");
discovery = (discovery_t *)
hashbin_get_first(irlmp->cachelog);
}
if (discovery) {
saddr = discovery->saddr;
daddr = discovery->daddr;
}
}
lap = hashbin_find(irlmp->links, saddr, NULL);
if (lap == NULL) {
IRDA_DEBUG(1, __FUNCTION__ "(), Unable to find a usable link!\n");
return -EHOSTUNREACH;
}
/* Check if LAP is disconnected or already connected */
if (lap->daddr == DEV_ADDR_ANY)
lap->daddr = daddr;
else if (lap->daddr != daddr) {
struct lsap_cb *any_lsap;
/* Check if some LSAPs are active on this LAP */
any_lsap = (struct lsap_cb *) hashbin_get_first(lap->lsaps);
if (any_lsap == NULL) {
/* No active connection, but LAP hasn't been
* disconnected yet (waiting for timeout in LAP).
* Maybe we could give LAP a bit of help in this case.
*/
IRDA_DEBUG(0, __FUNCTION__ "(), sorry, but I'm waiting for LAP to timeout!\n");
return -EAGAIN;
}
/* LAP is already connected to a different node, and LAP
* can only talk to one node at a time */
IRDA_DEBUG(0, __FUNCTION__ "(), sorry, but link is busy!\n");
return -EBUSY;
}
self->lap = lap;
/*
* 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, (int) self, NULL);
ASSERT(lsap != NULL, return -1;);
ASSERT(lsap->magic == LMP_LSAP_MAGIC, return -1;);
ASSERT(lsap->lap != NULL, return -1;);
ASSERT(lsap->lap->magic == LMP_LAP_MAGIC, return -1;);
hashbin_insert(self->lap->lsaps, (irda_queue_t *) self, (int) self, NULL);
set_bit(0, &self->connected); /* TRUE */
/*
* User supplied qos specifications?
*/
if (qos)
self->qos = *qos;
irlmp_do_lsap_event(self, LM_CONNECT_REQUEST, skb);
return 0;
}
/*
* Function irlmp_connect_indication (self)
*
* Incoming connection
*
*/
void irlmp_connect_indication(struct lsap_cb *self, struct sk_buff *skb)
{
int max_seg_size;
int lap_header_size;
int max_header_size;
ASSERT(self != NULL, return;);
ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
ASSERT(skb != NULL, return;);
ASSERT(self->lap != NULL, return;);
IRDA_DEBUG(2, __FUNCTION__ "(), slsap_sel=%02x, dlsap_sel=%02x\n",
self->slsap_sel, self->dlsap_sel);
/* Note : self->lap is set in irlmp_link_data_indication(),
* (case CONNECT_CMD:) because we have no way to set it here.
* Similarly, self->dlsap_sel is usually set in irlmp_find_lsap().
* Jean II */
self->qos = *self->lap->qos;
max_seg_size = self->lap->qos->data_size.value-LMP_HEADER;
lap_header_size = IRLAP_GET_HEADER_SIZE(self->lap->irlap);
max_header_size = LMP_HEADER + lap_header_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,
max_header_size, skb);
else
dev_kfree_skb(skb);
}
/*
* Function irlmp_connect_response (handle, userdata)
*
* Service user is accepting connection
*
*/
int irlmp_connect_response(struct lsap_cb *self, struct sk_buff *userdata)
{
ASSERT(self != NULL, return -1;);
ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
ASSERT(userdata != NULL, return -1;);
set_bit(0, &self->connected); /* TRUE */
IRDA_DEBUG(2, __FUNCTION__ "(), 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 -1;);
skb_push(userdata, LMP_CONTROL_HEADER);
irlmp_do_lsap_event(self, LM_CONNECT_RESPONSE, userdata);
return 0;
}
/*
* 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_header_size;
int lap_header_size;
int max_seg_size;
IRDA_DEBUG(3, __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->lap->qos->data_size.value-LMP_HEADER;
lap_header_size = IRLAP_GET_HEADER_SIZE(self->lap->irlap);
max_header_size = LMP_HEADER + lap_header_size;
IRDA_DEBUG(2, __FUNCTION__ "(), max_header_size=%d\n",
max_header_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,
max_header_size, skb);
} else
dev_kfree_skb(skb);
}
/*
* Function irlmp_dup (orig, instance)
*
* Duplicate LSAP, can be used by servers to confirm a connection on a
* new LSAP so it can keep listening on the old one.
*
*/
struct lsap_cb *irlmp_dup(struct lsap_cb *orig, void *instance)
{
struct lsap_cb *new;
IRDA_DEBUG(1, __FUNCTION__ "()\n");
/* Only allowed to duplicate unconnected LSAP's */
if (!hashbin_find(irlmp->unconnected_lsaps, (int) orig, NULL)) {
IRDA_DEBUG(0, __FUNCTION__ "(), unable to find LSAP\n");
return NULL;
}
new = kmalloc(sizeof(struct lsap_cb), GFP_ATOMIC);
if (!new) {
IRDA_DEBUG(0, __FUNCTION__ "(), unable to kmalloc\n");
return NULL;
}
/* Dup */
memcpy(new, orig, sizeof(struct lsap_cb));
new->notify.instance = instance;
/* new->lap = orig->lap; => done in the memcpy() */
/* new->slsap_sel = orig->slsap_sel; => done in the memcpy() */
init_timer(&new->watchdog_timer);
hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) new, (int) new,
NULL);
/* Make sure that we invalidate the cache */
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
irlmp->cache.valid = FALSE;
#endif /* CONFIG_IRDA_CACHE_LAST_LSAP */
return new;
}
/*
* Function irlmp_disconnect_request (handle, userdata)
*
* The service user is requesting disconnection, this will not remove the
* LSAP, but only mark it as disconnected
*/
int irlmp_disconnect_request(struct lsap_cb *self, struct sk_buff *userdata)
{
struct lsap_cb *lsap;
ASSERT(self != NULL, return -1;);
ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
ASSERT(userdata != NULL, return -1;);
/* Already disconnected ?
* There is a race condition between irlmp_disconnect_indication()
* and us that might mess up the hashbins below. This fixes it.
* Jean II */
if (! test_and_clear_bit(0, &self->connected)) {
IRDA_DEBUG(0, __FUNCTION__ "(), already disconnected!\n");
dev_kfree_skb(userdata);
return -1;
}
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 -1;);
ASSERT(self->lap->magic == LMP_LAP_MAGIC, return -1;);
ASSERT(self->lap->lsaps != NULL, return -1;);
lsap = hashbin_remove(self->lap->lsaps, (int) self, NULL);
ASSERT(lsap != NULL, return -1;);
ASSERT(lsap->magic == LMP_LSAP_MAGIC, return -1;);
ASSERT(lsap == self, return -1;);
hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) self, (int) self,
NULL);
/* Reset some values */
self->dlsap_sel = LSAP_ANY;
self->lap = NULL;
return 0;
}
/*
* 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;
IRDA_DEBUG(1, __FUNCTION__ "(), reason=%s\n", lmp_reasons[reason]);
ASSERT(self != NULL, return;);
ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
IRDA_DEBUG(3, __FUNCTION__ "(), slsap_sel=%02x, dlsap_sel=%02x\n",
self->slsap_sel, self->dlsap_sel);
/* Already disconnected ?
* There is a race condition between irlmp_disconnect_request()
* and us that might mess up the hashbins below. This fixes it.
* Jean II */
if (! test_and_clear_bit(0, &self->connected)) {
IRDA_DEBUG(0, __FUNCTION__ "(), already disconnected!\n");
if (userdata)
dev_kfree_skb(userdata);
return;
}
#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
irlmp->cache.valid = FALSE;
#endif
/*
* Remove association between this LSAP and the link it used
*/
ASSERT(self->lap != NULL, return;);
ASSERT(self->lap->lsaps != NULL, return;);
lsap = hashbin_remove(self->lap->lsaps, (int) self, NULL);
ASSERT(lsap != NULL, return;);
ASSERT(lsap == self, return;);
hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) lsap, (int) lsap,
NULL);
self->dlsap_sel = LSAP_ANY;
self->lap = NULL;
/*
* Inform service user
*/
if (self->notify.disconnect_indication)
self->notify.disconnect_indication(self->notify.instance,
self, reason, userdata);
else {
IRDA_DEBUG(0, __FUNCTION__ "(), no handler\n");
if (userdata)
dev_kfree_skb(userdata);
}
}
/*
* Function irlmp_do_expiry (void)
*
* Do a cleanup of the discovery log (remove old entries)
*
* Note : separate from irlmp_do_discovery() so that we can handle
* passive discovery properly.
*/
void irlmp_do_expiry()
{
struct lap_cb *lap;
/*
* Expire discovery on all links which are *not* connected.
* On links which are connected, we can't do discovery
* anymore and can't refresh the log, so we freeze the
* discovery log to keep info about the device we are
* connected to. - Jean II
*/
lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
while (lap != NULL) {
ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
if (lap->lap_state == LAP_STANDBY) {
/* Expire discoveries discovered on this link */
irlmp_expire_discoveries(irlmp->cachelog, lap->saddr,
FALSE);
}
lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
}
}
/*
* Function irlmp_do_discovery (nslots)
*
* Do some discovery on all links
*
* Note : log expiry is done above.
*/
void irlmp_do_discovery(int nslots)
{
struct lap_cb *lap;
/* Make sure the value is sane */
if ((nslots != 1) && (nslots != 6) && (nslots != 8) && (nslots != 16)){
WARNING(__FUNCTION__
"(), invalid value for number of slots!\n");
nslots = sysctl_discovery_slots = 8;
}
/* Construct new discovery info to be used by IrLAP, */
irlmp->discovery_cmd.hints.word = irlmp->hints.word;
/*
* 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.nickname, sysctl_devname,
NICKNAME_MAX_LEN);
irlmp->discovery_cmd.name_len = strlen(irlmp->discovery_cmd.nickname);
irlmp->discovery_cmd.nslots = nslots;
/*
* 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;);
if (lap->lap_state == LAP_STANDBY) {
/* Try to discover */
irlmp_do_lap_event(lap, LM_LAP_DISCOVERY_REQUEST,
NULL);
}
lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
}
}
/*
* Function irlmp_discovery_request (nslots)
*
* Do a discovery of devices in front of the computer
*
*/
void irlmp_discovery_request(int nslots)
{
/* Return current cached discovery log */
irlmp_discovery_confirm(irlmp->cachelog);
/*
* Start a single discovery operation if discovery is not already
* running
*/
if (!sysctl_discovery) {
/* Check if user wants to override the default */
if (nslots == DISCOVERY_DEFAULT_SLOTS)
nslots = sysctl_discovery_slots;
irlmp_do_discovery(nslots);
/* Note : we never do expiry here. Expiry will run on the
* discovery timer regardless of the state of sysctl_discovery
* Jean II */
}
}
/*
* Function irlmp_get_discoveries (pn, mask, slots)
*
* Return the current discovery log
*
*/
struct irda_device_info *irlmp_get_discoveries(int *pn, __u16 mask, int nslots)
{
/* If discovery is not enabled, it's likely that the discovery log
* will be empty. So, we trigger a single discovery, so that next
* time the user call us there might be some results in the log.
* Jean II
*/
if (!sysctl_discovery) {
/* Check if user wants to override the default */
if (nslots == DISCOVERY_DEFAULT_SLOTS)
nslots = sysctl_discovery_slots;
/* Start discovery - will complete sometime later */
irlmp_do_discovery(nslots);
/* Note : we never do expiry here. Expiry will run on the
* discovery timer regardless of the state of sysctl_discovery
* Jean II */
}
/* Return current cached discovery log */
return(irlmp_copy_discoveries(irlmp->cachelog, pn, mask));
}
#if 0
/*
* Function irlmp_check_services (discovery)
*
*
*
*/
void irlmp_check_services(discovery_t *discovery)
{
struct irlmp_client *client;
__u8 *service_log;
__u8 service;
int i = 0;
IRDA_DEBUG(1, "IrDA Discovered: %s\n", discovery->info);
IRDA_DEBUG(1, " Services: ");
service_log = irlmp_hint_to_service(discovery->hints.byte);
if (!service_log)
return;
/*
* Check all services on the device
*/
while ((service = service_log[i++]) != S_END) {
IRDA_DEBUG( 4, "service=%02x\n", service);
client = hashbin_find(irlmp->registry, service, NULL);
if (entry && entry->discovery_callback) {
IRDA_DEBUG( 4, "discovery_callback!\n");
entry->discovery_callback(discovery);
} else {
/* Don't notify about the ANY service */
if (service == S_ANY)
continue;
/*
* Found no clients for dealing with this service,
*/
}
}
kfree(service_log);
}
#endif
/*
* Function irlmp_notify_client (log)
*
* Notify all about discovered devices
*
* Clients registered with IrLMP are :
* o IrComm
* o IrLAN
* o Any socket (in any state - ouch, that may be a lot !)
* The client may have defined a callback to be notified in case of
* partial/selective discovery based on the hints that it passed to IrLMP.
*/
static inline void
irlmp_notify_client(irlmp_client_t *client, hashbin_t *log)
{
discovery_t *discovery;
IRDA_DEBUG(3, __FUNCTION__ "()\n");
/* Check if client wants or not partial/selective log (optimisation) */
if (!client->disco_callback)
return;
/*
* Now, check all discovered devices (if any), and notify client
* only about the services that the client is interested in
*/
discovery = (discovery_t *) hashbin_get_first(log);
while (discovery != NULL) {
IRDA_DEBUG(3, "discovery->daddr = 0x%08x\n", discovery->daddr);
/*
* Any common hint bits? Remember to mask away the extension
* bits ;-)
*/
if (client->hint_mask & discovery->hints.word & 0x7f7f)
client->disco_callback(discovery, client->priv);
discovery = (discovery_t *) hashbin_get_next(log);
}
}
/*
* 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(hashbin_t *log)
{
irlmp_client_t *client;
IRDA_DEBUG(3, __FUNCTION__ "()\n");
ASSERT(log != NULL, return;);
if (!(HASHBIN_GET_SIZE(log)))
return;
client = (irlmp_client_t *) hashbin_get_first(irlmp->clients);
while (client != NULL) {
/* Check if we should notify client */
irlmp_notify_client(client, log);
client = (irlmp_client_t *) hashbin_get_next(irlmp->clients);
}
}
/*
* Function irlmp_discovery_expiry (expiry)
*
* This device is no longer been discovered, and therefore it is beeing
* purged from the discovery log. Inform all clients who have
* registered for this event...
*
* Note : called exclusively from discovery.c
* Note : as we are currently processing the log, the clients callback
* should *NOT* attempt to touch the log now.
*/
void irlmp_discovery_expiry(discovery_t *expiry)
{
irlmp_client_t *client;
IRDA_DEBUG(3, __FUNCTION__ "()\n");
ASSERT(expiry != NULL, return;);
client = (irlmp_client_t *) hashbin_get_first(irlmp->clients);
while (client != NULL) {
/* Check if we should notify client */
if ((client->expir_callback) &&
(client->hint_mask & expiry->hints.word & 0x7f7f))
client->expir_callback(expiry, client->priv);
/* Next client */
client = (irlmp_client_t *) hashbin_get_next(irlmp->clients);
}
}
/*
* Function irlmp_get_discovery_response ()
*
* Used by IrLAP to get the discovery info it needs when answering
* discovery requests by other devices.
*/
discovery_t *irlmp_get_discovery_response()
{
IRDA_DEBUG(4, __FUNCTION__ "()\n");
ASSERT(irlmp != NULL, return NULL;);
irlmp->discovery_rsp.hints.word = irlmp->hints.word;
/*
* 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.nickname, sysctl_devname,
NICKNAME_MAX_LEN);
irlmp->discovery_rsp.name_len = strlen(irlmp->discovery_rsp.nickname);
return &irlmp->discovery_rsp;
}
/*
* Function irlmp_data_request (self, skb)
*
* Send some data to peer device
*
*/
int irlmp_data_request(struct lsap_cb *self, struct sk_buff *skb)
{
ASSERT(self != NULL, return -1;);
ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
/* Make room for MUX header */
ASSERT(skb_headroom(skb) >= LMP_HEADER, return -1;);
skb_push(skb, LMP_HEADER);
return 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)
{
/* 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);
else
dev_kfree_skb(skb);
}
/*
* Function irlmp_udata_request (self, skb)
*
*
*
*/
int irlmp_udata_request(struct lsap_cb *self, struct sk_buff *skb)
{
IRDA_DEBUG(4, __FUNCTION__ "()\n");
ASSERT(skb != NULL, return -1;);
/* Make room for MUX header */
ASSERT(skb_headroom(skb) >= LMP_HEADER, return -1;);
skb_push(skb, LMP_HEADER);
return 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)
{
IRDA_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);
else
dev_kfree_skb(skb);
}
/*
* Function irlmp_connless_data_request (self, skb)
*
*
*
*/
#ifdef CONFIG_IRDA_ULTRA
int irlmp_connless_data_request(struct lsap_cb *self, struct sk_buff *skb)
{
struct sk_buff *clone_skb;
struct lap_cb *lap;
IRDA_DEBUG(4, __FUNCTION__ "()\n");
ASSERT(skb != NULL, return -1;);
/* Make room for MUX and PID header */
ASSERT(skb_headroom(skb) >= LMP_HEADER+LMP_PID_HEADER, return -1;);
/* Insert protocol identifier */
skb_push(skb, LMP_PID_HEADER);
skb->data[0] = self->pid;
/* Connectionless sockets must use 0x70 */
skb_push(skb, LMP_HEADER);
skb->data[0] = skb->data[1] = LSAP_CONNLESS;
/* Try to send Connectionless packets out on all links */
lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
while (lap != NULL) {
ASSERT(lap->magic == LMP_LAP_MAGIC, return -1;);
clone_skb = skb_clone(skb, GFP_ATOMIC);
if (!clone_skb)
return -ENOMEM;
irlap_unitdata_request(lap->irlap, clone_skb);
lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
}
dev_kfree_skb(skb);
return 0;
}
#endif /* CONFIG_IRDA_ULTRA */
/*
* Function irlmp_connless_data_indication (self, skb)
*
* Receive unreliable data outside any connection. Mostly used by Ultra
*
*/
#ifdef CONFIG_IRDA_ULTRA
void irlmp_connless_data_indication(struct lsap_cb *self, struct sk_buff *skb)
{
IRDA_DEBUG(4, __FUNCTION__ "()\n");
ASSERT(self != NULL, return;);
ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
ASSERT(skb != NULL, return;);
/* Hide LMP and PID header from layer above */
skb_pull(skb, LMP_HEADER+LMP_PID_HEADER);
if (self->notify.udata_indication)
self->notify.udata_indication(self->notify.instance, self,
skb);
else
dev_kfree_skb(skb);
}
#endif /* CONFIG_IRDA_ULTRA */
void irlmp_status_request(void)
{
IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented\n");
}
/*
* Propagate status indication from LAP to LSAPs (via LMP)
* This don't trigger any change of state in lap_cb, lmp_cb or lsap_cb,
* and the event is stateless, therefore we can bypass both state machines
* and send the event direct to the LSAP user.
* Jean II
*/
void irlmp_status_indication(struct lap_cb *self,
LINK_STATUS link, LOCK_STATUS lock)
{
struct lsap_cb *next;
struct lsap_cb *curr;
/* Send status_indication to all LSAPs using this link */
next = (struct lsap_cb *) hashbin_get_first( self->lsaps);
while (next != NULL ) {
curr = next;
next = (struct lsap_cb *) hashbin_get_next(self->lsaps);
ASSERT(curr->magic == LMP_LSAP_MAGIC, return;);
/*
* Inform service user if he has requested it
*/
if (curr->notify.status_indication != NULL)
curr->notify.status_indication(curr->notify.instance,
link, lock);
else
IRDA_DEBUG(2, __FUNCTION__ "(), no handler\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. 16 entries should be safe
* since we currently only support 2 hint bytes
*/
service = kmalloc(16, GFP_ATOMIC);
if (!service) {
IRDA_DEBUG(1, __FUNCTION__ "(), Unable to kmalloc!\n");
return NULL;
}
if (!hint[0]) {
IRDA_DEBUG(1, "<None>\n");
kfree(service);
return NULL;
}
if (hint[0] & HINT_PNP)
IRDA_DEBUG(1, "PnP Compatible ");
if (hint[0] & HINT_PDA)
IRDA_DEBUG(1, "PDA/Palmtop ");
if (hint[0] & HINT_COMPUTER)
IRDA_DEBUG(1, "Computer ");
if (hint[0] & HINT_PRINTER) {
IRDA_DEBUG(1, "Printer ");
service[i++] = S_PRINTER;
}
if (hint[0] & HINT_MODEM)
IRDA_DEBUG(1, "Modem ");
if (hint[0] & HINT_FAX)
IRDA_DEBUG(1, "Fax ");
if (hint[0] & HINT_LAN) {
IRDA_DEBUG(1, "LAN Access ");
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) {
IRDA_DEBUG(1, "Telephony ");
service[i++] = S_TELEPHONY;
} if (hint[1] & HINT_FILE_SERVER)
IRDA_DEBUG(1, "File Server ");
if (hint[1] & HINT_COMM) {
IRDA_DEBUG(1, "IrCOMM ");
service[i++] = S_COMM;
}
if (hint[1] & HINT_OBEX) {
IRDA_DEBUG(1, "IrOBEX ");
service[i++] = S_OBEX;
}
}
IRDA_DEBUG(1, "\n");
/* So that client can be notified about any discovery */
service[i++] = S_ANY;
service[i] = S_END;
return service;
}
/*
* Function irlmp_service_to_hint (service)
*
* Converts a service type, to a hint bit
*
* Returns: a 16 bit hint value, with the service bit set
*/
__u16 irlmp_service_to_hint(int service)
{
__u16_host_order hint;
hint.word = 0;
switch (service) {
case S_PNP:
hint.byte[0] |= HINT_PNP;
break;
case S_PDA:
hint.byte[0] |= HINT_PDA;
break;
case S_COMPUTER:
hint.byte[0] |= HINT_COMPUTER;
break;
case S_PRINTER:
hint.byte[0] |= HINT_PRINTER;
break;
case S_MODEM:
hint.byte[0] |= HINT_PRINTER;
break;
case S_LAN:
hint.byte[0] |= HINT_LAN;
break;
case S_COMM:
hint.byte[0] |= HINT_EXTENSION;
hint.byte[1] |= HINT_COMM;
break;
case S_OBEX:
hint.byte[0] |= HINT_EXTENSION;
hint.byte[1] |= HINT_OBEX;
break;
case S_TELEPHONY:
hint.byte[0] |= HINT_EXTENSION;
hint.byte[1] |= HINT_TELEPHONY;
break;
case S_ANY:
hint.word = 0xffff;
break;
default:
IRDA_DEBUG( 1, __FUNCTION__ "(), Unknown service!\n");
break;
}
return hint.word;
}
/*
* Function irlmp_register_service (service)
*
* Register local service with IrLMP
*
*/
__u32 irlmp_register_service(__u16 hints)
{
irlmp_service_t *service;
__u32 handle;
IRDA_DEBUG(4, __FUNCTION__ "(), hints = %04x\n", hints);
/* Get a unique handle for this service */
get_random_bytes(&handle, sizeof(handle));
while (hashbin_find(irlmp->services, handle, NULL) || !handle)
get_random_bytes(&handle, sizeof(handle));
irlmp->hints.word |= hints;
/* Make a new registration */
service = kmalloc(sizeof(irlmp_service_t), GFP_ATOMIC);
if (!service) {
IRDA_DEBUG(1, __FUNCTION__ "(), Unable to kmalloc!\n");
return 0;
}
service->hints = hints;
hashbin_insert(irlmp->services, (irda_queue_t *) service, handle, NULL);
return handle;
}
/*
* Function irlmp_unregister_service (handle)
*
* Unregister service with IrLMP.
*
* Returns: 0 on success, -1 on error
*/
int irlmp_unregister_service(__u32 handle)
{
irlmp_service_t *service;
IRDA_DEBUG(4, __FUNCTION__ "()\n");
if (!handle)
return -1;
service = hashbin_find(irlmp->services, handle, NULL);
if (!service) {
IRDA_DEBUG(1, __FUNCTION__ "(), Unknown service!\n");
return -1;
}
service = hashbin_remove(irlmp->services, handle, NULL);
if (service)
kfree(service);
/* Remove old hint bits */
irlmp->hints.word = 0;
/* Refresh current hint bits */
service = (irlmp_service_t *) hashbin_get_first(irlmp->services);
while (service) {
irlmp->hints.word |= service->hints;
service = (irlmp_service_t *)hashbin_get_next(irlmp->services);
}
return 0;
}
/*
* Function irlmp_register_client (hint_mask, callback1, callback2)
*
* Register a local client with IrLMP
* First callback is selective discovery (based on hints)
* Second callback is for selective discovery expiries
*
* Returns: handle > 0 on success, 0 on error
*/
__u32 irlmp_register_client(__u16 hint_mask, DISCOVERY_CALLBACK1 disco_clb,
DISCOVERY_CALLBACK1 expir_clb, void *priv)
{
irlmp_client_t *client;
__u32 handle;
IRDA_DEBUG(1, __FUNCTION__ "()\n");
ASSERT(irlmp != NULL, return 0;);
/* Get a unique handle for this client */
get_random_bytes(&handle, sizeof(handle));
while (hashbin_find(irlmp->clients, handle, NULL) || !handle)
get_random_bytes(&handle, sizeof(handle));
/* Make a new registration */
client = kmalloc(sizeof(irlmp_client_t), GFP_ATOMIC);
if (!client) {
IRDA_DEBUG( 1, __FUNCTION__ "(), Unable to kmalloc!\n");
return 0;
}
/* Register the details */
client->hint_mask = hint_mask;
client->disco_callback = disco_clb;
client->expir_callback = expir_clb;
client->priv = priv;
hashbin_insert(irlmp->clients, (irda_queue_t *) client, handle, NULL);
return handle;
}
/*
* Function irlmp_update_client (handle, hint_mask, callback1, callback2)
*
* Updates specified client (handle) with possibly new hint_mask and
* callback
*
* Returns: 0 on success, -1 on error
*/
int irlmp_update_client(__u32 handle, __u16 hint_mask,
DISCOVERY_CALLBACK1 disco_clb,
DISCOVERY_CALLBACK1 expir_clb, void *priv)
{
irlmp_client_t *client;
if (!handle)
return -1;
client = hashbin_find(irlmp->clients, handle, NULL);
if (!client) {
IRDA_DEBUG(1, __FUNCTION__ "(), Unknown client!\n");
return -1;
}
client->hint_mask = hint_mask;
client->disco_callback = disco_clb;
client->expir_callback = expir_clb;
client->priv = priv;
return 0;
}
/*
* Function irlmp_unregister_client (handle)
*
* Returns: 0 on success, -1 on error
*
*/
int irlmp_unregister_client(__u32 handle)
{
struct irlmp_client *client;
IRDA_DEBUG(4, __FUNCTION__ "()\n");
if (!handle)
return -1;
client = hashbin_find(irlmp->clients, handle, NULL);
if (!client) {
IRDA_DEBUG(1, __FUNCTION__ "(), Unknown client!\n");
return -1;
}
IRDA_DEBUG( 4, __FUNCTION__ "(), removing client!\n");
client = hashbin_remove( irlmp->clients, handle, NULL);
if (client)
kfree(client);
return 0;
}
/*
* 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;);
IRDA_DEBUG(4, __FUNCTION__ "()\n");
#ifdef CONFIG_IRDA_ULTRA
/* Accept all bindings to the connectionless LSAP */
if (slsap_sel == LSAP_CONNLESS)
return FALSE;
#endif /* CONFIG_IRDA_ULTRA */
/* Valid values are between 0 and 127 */
if (slsap_sel > LSAP_MAX)
return TRUE;
/*
* 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)) {
IRDA_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;
int wrapped = 0;
ASSERT(irlmp != NULL, return -1;);
ASSERT(irlmp->magic == LMP_MAGIC, return -1;);
lsap_sel = irlmp->free_lsap_sel++;
/* Check if the new free lsap is really free */
while (irlmp_slsap_inuse(irlmp->free_lsap_sel)) {
irlmp->free_lsap_sel++;
/* Check if we need to wraparound (0x70-0x7f are reserved) */
if (irlmp->free_lsap_sel > LSAP_MAX) {
irlmp->free_lsap_sel = 10;
/* Make sure we terminate the loop */
if (wrapped++)
return 0;
}
}
IRDA_DEBUG(4, __FUNCTION__ "(), 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 */
IRDA_DEBUG( 1, __FUNCTION__ "(), LAP_DISC_INDICATION\n");
reason = LM_USER_REQUEST;
break;
case LAP_NO_RESPONSE: /* To many retransmits without response */
IRDA_DEBUG( 1, __FUNCTION__ "(), LAP_NO_RESPONSE\n");
reason = LM_LAP_DISCONNECT;
break;
case LAP_RESET_INDICATION:
IRDA_DEBUG( 1, __FUNCTION__ "(), LAP_RESET_INDICATION\n");
reason = LM_LAP_RESET;
break;
case LAP_FOUND_NONE:
case LAP_MEDIA_BUSY:
case LAP_PRIMARY_CONFLICT:
IRDA_DEBUG(1, __FUNCTION__ "(), LAP_FOUND_NONE, LAP_MEDIA_BUSY or LAP_PRIMARY_CONFLICT\n");
reason = LM_CONNECT_FAILURE;
break;
default:
IRDA_DEBUG(1, __FUNCTION__
"(), Unknow IrLAP disconnect reason %d!\n", lap_reason);
reason = LM_LAP_DISCONNECT;
break;
}
return reason;
}
__u32 irlmp_get_saddr(struct lsap_cb *self)
{
ASSERT(self != NULL, return 0;);
ASSERT(self->lap != NULL, return 0;);
return self->lap->saddr;
}
__u32 irlmp_get_daddr(struct lsap_cb *self)
{
ASSERT(self != NULL, return 0;);
ASSERT(self->lap != NULL, return 0;);
return self->lap->daddr;
}
#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)
{
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) {
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, "num lsaps: %d",
HASHBIN_GET_SIZE(lap->lsaps));
len += sprintf(buf+len, "\n");
len += sprintf(buf+len, "\n Connected 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);
}
len += sprintf(buf+len, "\n");
lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
}
restore_flags(flags);
return len;
}
#endif /* PROC_FS */
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