linux/net/irda/iriap.c

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/*********************************************************************
*
* Filename: iriap.c
* Version: 0.8
* Description: Information Access Protocol (IAP)
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Thu Aug 21 00:02:07 1997
* Modified at: Sat Dec 25 16:42:42 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
* All Rights Reserved.
* Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* Neither Dag Brattli nor University of Tromsø admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/seq_file.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
#include <net/irda/irda.h>
#include <net/irda/irttp.h>
#include <net/irda/irlmp.h>
#include <net/irda/irias_object.h>
#include <net/irda/iriap_event.h>
#include <net/irda/iriap.h>
#ifdef CONFIG_IRDA_DEBUG
/* FIXME: This one should go in irlmp.c */
static const char *const ias_charset_types[] = {
"CS_ASCII",
"CS_ISO_8859_1",
"CS_ISO_8859_2",
"CS_ISO_8859_3",
"CS_ISO_8859_4",
"CS_ISO_8859_5",
"CS_ISO_8859_6",
"CS_ISO_8859_7",
"CS_ISO_8859_8",
"CS_ISO_8859_9",
"CS_UNICODE"
};
#endif /* CONFIG_IRDA_DEBUG */
static hashbin_t *iriap = NULL;
static void *service_handle;
static void __iriap_close(struct iriap_cb *self);
static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
static void iriap_disconnect_indication(void *instance, void *sap,
LM_REASON reason, struct sk_buff *skb);
static void iriap_connect_indication(void *instance, void *sap,
struct qos_info *qos, __u32 max_sdu_size,
__u8 max_header_size,
struct sk_buff *skb);
static void iriap_connect_confirm(void *instance, void *sap,
struct qos_info *qos,
__u32 max_sdu_size, __u8 max_header_size,
struct sk_buff *skb);
static int iriap_data_indication(void *instance, void *sap,
struct sk_buff *skb);
static void iriap_watchdog_timer_expired(void *data);
static inline void iriap_start_watchdog_timer(struct iriap_cb *self,
int timeout)
{
irda_start_timer(&self->watchdog_timer, timeout, self,
iriap_watchdog_timer_expired);
}
static struct lock_class_key irias_objects_key;
/*
* Function iriap_init (void)
*
* Initializes the IrIAP layer, called by the module initialization code
* in irmod.c
*/
int __init iriap_init(void)
{
struct ias_object *obj;
struct iriap_cb *server;
__u8 oct_seq[6];
__u16 hints;
/* Allocate master array */
iriap = hashbin_new(HB_LOCK);
if (!iriap)
return -ENOMEM;
/* Object repository - defined in irias_object.c */
irias_objects = hashbin_new(HB_LOCK);
if (!irias_objects) {
IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
__func__);
hashbin_delete(iriap, NULL);
return -ENOMEM;
}
lockdep_set_class_and_name(&irias_objects->hb_spinlock, &irias_objects_key,
"irias_objects");
/*
* Register some default services for IrLMP
*/
hints = irlmp_service_to_hint(S_COMPUTER);
service_handle = irlmp_register_service(hints);
/* Register the Device object with LM-IAS */
obj = irias_new_object("Device", IAS_DEVICE_ID);
irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
oct_seq[0] = 0x01; /* Version 1 */
oct_seq[1] = 0x00; /* IAS support bits */
oct_seq[2] = 0x00; /* LM-MUX support bits */
#ifdef CONFIG_IRDA_ULTRA
oct_seq[2] |= 0x04; /* Connectionless Data support */
#endif
irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
IAS_KERNEL_ATTR);
irias_insert_object(obj);
/*
* Register server support with IrLMP so we can accept incoming
* connections
*/
server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
if (!server) {
IRDA_DEBUG(0, "%s(), unable to open server\n", __func__);
return -1;
}
iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
return 0;
}
/*
* Function iriap_cleanup (void)
*
* Initializes the IrIAP layer, called by the module cleanup code in
* irmod.c
*/
[IrDA]: Fix IrDA build failure When having built-in IrDA, we hit the following error: `irda_sysctl_unregister' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o `irda_proc_unregister' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o `irsock_cleanup' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o `irttp_cleanup' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o `iriap_cleanup' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o `irda_device_cleanup' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o `irlap_cleanup' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o `irlmp_cleanup' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o make[1]: *** [.tmp_vmlinux1] Error 1 make: *** [_all] Error 2 This is due to the irda_init fix recently added, where we call __exit routines from an __init one. It is a build failure that I didn't catch because it doesn't show up when building IrDA as a module. My apologies for that. The following patch fixes that failure and is against your net-2.6 tree. I hope it can make it to the merge window, and stable@kernel.org is CCed on this mail. Signed-off-by: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-18 17:16:30 +08:00
void iriap_cleanup(void)
{
irlmp_unregister_service(service_handle);
hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
}
/*
* Function iriap_open (void)
*
* Opens an instance of the IrIAP layer, and registers with IrLMP
*/
struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
CONFIRM_CALLBACK callback)
{
struct iriap_cb *self;
IRDA_DEBUG(2, "%s()\n", __func__);
self = kzalloc(sizeof(*self), GFP_ATOMIC);
if (!self) {
IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
return NULL;
}
/*
* Initialize instance
*/
self->magic = IAS_MAGIC;
self->mode = mode;
if (mode == IAS_CLIENT)
iriap_register_lsap(self, slsap_sel, mode);
self->confirm = callback;
self->priv = priv;
/* iriap_getvaluebyclass_request() will construct packets before
* we connect, so this must have a sane value... Jean II */
self->max_header_size = LMP_MAX_HEADER;
init_timer(&self->watchdog_timer);
hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
/* Initialize state machines */
iriap_next_client_state(self, S_DISCONNECT);
iriap_next_call_state(self, S_MAKE_CALL);
iriap_next_server_state(self, R_DISCONNECT);
iriap_next_r_connect_state(self, R_WAITING);
return self;
}
EXPORT_SYMBOL(iriap_open);
/*
* Function __iriap_close (self)
*
* Removes (deallocates) the IrIAP instance
*
*/
static void __iriap_close(struct iriap_cb *self)
{
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
del_timer(&self->watchdog_timer);
if (self->request_skb)
dev_kfree_skb(self->request_skb);
self->magic = 0;
kfree(self);
}
/*
* Function iriap_close (void)
*
* Closes IrIAP and deregisters with IrLMP
*/
void iriap_close(struct iriap_cb *self)
{
struct iriap_cb *entry;
IRDA_DEBUG(2, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
if (self->lsap) {
irlmp_close_lsap(self->lsap);
self->lsap = NULL;
}
entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
IRDA_ASSERT(entry == self, return;);
__iriap_close(self);
}
EXPORT_SYMBOL(iriap_close);
static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
{
notify_t notify;
IRDA_DEBUG(2, "%s()\n", __func__);
irda_notify_init(&notify);
notify.connect_confirm = iriap_connect_confirm;
notify.connect_indication = iriap_connect_indication;
notify.disconnect_indication = iriap_disconnect_indication;
notify.data_indication = iriap_data_indication;
notify.instance = self;
if (mode == IAS_CLIENT)
strcpy(notify.name, "IrIAS cli");
else
strcpy(notify.name, "IrIAS srv");
self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
if (self->lsap == NULL) {
IRDA_ERROR("%s: Unable to allocated LSAP!\n", __func__);
return -1;
}
self->slsap_sel = self->lsap->slsap_sel;
return 0;
}
/*
* Function iriap_disconnect_indication (handle, reason)
*
* Got disconnect, so clean up everything associated with this connection
*
*/
static void iriap_disconnect_indication(void *instance, void *sap,
LM_REASON reason,
struct sk_buff *skb)
{
struct iriap_cb *self;
IRDA_DEBUG(4, "%s(), reason=%s [%d]\n", __func__,
irlmp_reason_str(reason), reason);
self = instance;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(iriap != NULL, return;);
del_timer(&self->watchdog_timer);
/* Not needed */
if (skb)
dev_kfree_skb(skb);
if (self->mode == IAS_CLIENT) {
IRDA_DEBUG(4, "%s(), disconnect as client\n", __func__);
iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
NULL);
/*
* Inform service user that the request failed by sending
* it a NULL value. Warning, the client might close us, so
* remember no to use self anymore after calling confirm
*/
if (self->confirm)
self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
} else {
IRDA_DEBUG(4, "%s(), disconnect as server\n", __func__);
iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
NULL);
iriap_close(self);
}
}
/*
* Function iriap_disconnect_request (handle)
*/
static void iriap_disconnect_request(struct iriap_cb *self)
{
struct sk_buff *tx_skb;
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
if (tx_skb == NULL) {
IRDA_DEBUG(0,
"%s(), Could not allocate an sk_buff of length %d\n",
__func__, LMP_MAX_HEADER);
return;
}
/*
* Reserve space for MUX control and LAP header
*/
skb_reserve(tx_skb, LMP_MAX_HEADER);
irlmp_disconnect_request(self->lsap, tx_skb);
}
/*
* Function iriap_getvaluebyclass (addr, name, attr)
*
* Retrieve all values from attribute in all objects with given class
* name
*/
int iriap_getvaluebyclass_request(struct iriap_cb *self,
__u32 saddr, __u32 daddr,
char *name, char *attr)
{
struct sk_buff *tx_skb;
int name_len, attr_len, skb_len;
__u8 *frame;
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
/* Client must supply the destination device address */
if (!daddr)
return -1;
self->daddr = daddr;
self->saddr = saddr;
/*
* Save operation, so we know what the later indication is about
*/
self->operation = GET_VALUE_BY_CLASS;
/* Give ourselves 10 secs to finish this operation */
iriap_start_watchdog_timer(self, 10*HZ);
name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */
attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */
skb_len = self->max_header_size+2+name_len+1+attr_len+4;
tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
if (!tx_skb)
return -ENOMEM;
/* Reserve space for MUX and LAP header */
skb_reserve(tx_skb, self->max_header_size);
skb_put(tx_skb, 3+name_len+attr_len);
frame = tx_skb->data;
/* Build frame */
frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
frame[1] = name_len; /* Insert length of name */
memcpy(frame+2, name, name_len); /* Insert name */
frame[2+name_len] = attr_len; /* Insert length of attr */
memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */
iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
/* Drop reference count - see state_s_disconnect(). */
dev_kfree_skb(tx_skb);
return 0;
}
EXPORT_SYMBOL(iriap_getvaluebyclass_request);
/*
* Function iriap_getvaluebyclass_confirm (self, skb)
*
* Got result from GetValueByClass command. Parse it and return result
* to service user.
*
*/
static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
struct sk_buff *skb)
{
struct ias_value *value;
int charset;
__u32 value_len;
__u32 tmp_cpu32;
__u16 obj_id;
__u16 len;
__u8 type;
__u8 *fp;
int n;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(skb != NULL, return;);
/* Initialize variables */
fp = skb->data;
n = 2;
/* Get length, MSB first */
len = get_unaligned_be16(fp + n);
n += 2;
IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
/* Get object ID, MSB first */
obj_id = get_unaligned_be16(fp + n);
n += 2;
type = fp[n++];
IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
switch (type) {
case IAS_INTEGER:
memcpy(&tmp_cpu32, fp+n, 4); n += 4;
be32_to_cpus(&tmp_cpu32);
value = irias_new_integer_value(tmp_cpu32);
/* Legal values restricted to 0x01-0x6f, page 15 irttp */
IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
break;
case IAS_STRING:
charset = fp[n++];
switch (charset) {
case CS_ASCII:
break;
/* case CS_ISO_8859_1: */
/* case CS_ISO_8859_2: */
/* case CS_ISO_8859_3: */
/* case CS_ISO_8859_4: */
/* case CS_ISO_8859_5: */
/* case CS_ISO_8859_6: */
/* case CS_ISO_8859_7: */
/* case CS_ISO_8859_8: */
/* case CS_ISO_8859_9: */
/* case CS_UNICODE: */
default:
IRDA_DEBUG(0, "%s(), charset [%d] %s, not supported\n",
__func__, charset,
charset < ARRAY_SIZE(ias_charset_types) ?
ias_charset_types[charset] :
"(unknown)");
/* Aborting, close connection! */
iriap_disconnect_request(self);
return;
/* break; */
}
value_len = fp[n++];
IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
/* Make sure the string is null-terminated */
if (n + value_len < skb->len)
fp[n + value_len] = 0x00;
IRDA_DEBUG(4, "Got string %s\n", fp+n);
/* Will truncate to IAS_MAX_STRING bytes */
value = irias_new_string_value(fp+n);
break;
case IAS_OCT_SEQ:
value_len = get_unaligned_be16(fp + n);
n += 2;
/* Will truncate to IAS_MAX_OCTET_STRING bytes */
value = irias_new_octseq_value(fp+n, value_len);
break;
default:
value = irias_new_missing_value();
break;
}
/* Finished, close connection! */
iriap_disconnect_request(self);
/* Warning, the client might close us, so remember no to use self
* anymore after calling confirm
*/
if (self->confirm)
self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
else {
IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
irias_delete_value(value);
}
}
/*
* Function iriap_getvaluebyclass_response ()
*
* Send answer back to remote LM-IAS
*
*/
static void iriap_getvaluebyclass_response(struct iriap_cb *self,
__u16 obj_id,
__u8 ret_code,
struct ias_value *value)
{
struct sk_buff *tx_skb;
int n;
__be32 tmp_be32;
__be16 tmp_be16;
__u8 *fp;
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(value != NULL, return;);
IRDA_ASSERT(value->len <= 1024, return;);
/* Initialize variables */
n = 0;
/*
* We must adjust the size of the response after the length of the
* value. We add 32 bytes because of the 6 bytes for the frame and
* max 5 bytes for the value coding.
*/
tx_skb = alloc_skb(value->len + self->max_header_size + 32,
GFP_ATOMIC);
if (!tx_skb)
return;
/* Reserve space for MUX and LAP header */
skb_reserve(tx_skb, self->max_header_size);
skb_put(tx_skb, 6);
fp = tx_skb->data;
/* Build frame */
fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
fp[n++] = ret_code;
/* Insert list length (MSB first) */
tmp_be16 = htons(0x0001);
memcpy(fp+n, &tmp_be16, 2); n += 2;
/* Insert object identifier ( MSB first) */
tmp_be16 = cpu_to_be16(obj_id);
memcpy(fp+n, &tmp_be16, 2); n += 2;
switch (value->type) {
case IAS_STRING:
skb_put(tx_skb, 3 + value->len);
fp[n++] = value->type;
fp[n++] = 0; /* ASCII */
fp[n++] = (__u8) value->len;
memcpy(fp+n, value->t.string, value->len); n+=value->len;
break;
case IAS_INTEGER:
skb_put(tx_skb, 5);
fp[n++] = value->type;
tmp_be32 = cpu_to_be32(value->t.integer);
memcpy(fp+n, &tmp_be32, 4); n += 4;
break;
case IAS_OCT_SEQ:
skb_put(tx_skb, 3 + value->len);
fp[n++] = value->type;
tmp_be16 = cpu_to_be16(value->len);
memcpy(fp+n, &tmp_be16, 2); n += 2;
memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
break;
case IAS_MISSING:
IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
skb_put(tx_skb, 1);
fp[n++] = value->type;
break;
default:
IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
break;
}
iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
/* Drop reference count - see state_r_execute(). */
dev_kfree_skb(tx_skb);
}
/*
* Function iriap_getvaluebyclass_indication (self, skb)
*
* getvaluebyclass is requested from peer LM-IAS
*
*/
static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
struct sk_buff *skb)
{
struct ias_object *obj;
struct ias_attrib *attrib;
int name_len;
int attr_len;
char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */
char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */
__u8 *fp;
int n;
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(skb != NULL, return;);
fp = skb->data;
n = 1;
name_len = fp[n++];
IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
memcpy(name, fp+n, name_len); n+=name_len;
name[name_len] = '\0';
attr_len = fp[n++];
IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
memcpy(attr, fp+n, attr_len); n+=attr_len;
attr[attr_len] = '\0';
IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
obj = irias_find_object(name);
if (obj == NULL) {
IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
&irias_missing);
return;
}
IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
attrib = irias_find_attrib(obj, attr);
if (attrib == NULL) {
IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
iriap_getvaluebyclass_response(self, obj->id,
IAS_ATTRIB_UNKNOWN,
&irias_missing);
return;
}
/* We have a match; send the value. */
iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
attrib->value);
}
/*
* Function iriap_send_ack (void)
*
* Currently not used
*
*/
void iriap_send_ack(struct iriap_cb *self)
{
struct sk_buff *tx_skb;
__u8 *frame;
IRDA_DEBUG(2, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
if (!tx_skb)
return;
/* Reserve space for MUX and LAP header */
skb_reserve(tx_skb, self->max_header_size);
skb_put(tx_skb, 1);
frame = tx_skb->data;
/* Build frame */
frame[0] = IAP_LST | IAP_ACK | self->operation;
irlmp_data_request(self->lsap, tx_skb);
}
void iriap_connect_request(struct iriap_cb *self)
{
int ret;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
ret = irlmp_connect_request(self->lsap, LSAP_IAS,
self->saddr, self->daddr,
NULL, NULL);
if (ret < 0) {
IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
}
}
/*
* Function iriap_connect_confirm (handle, skb)
*
* LSAP connection confirmed!
*
*/
static void iriap_connect_confirm(void *instance, void *sap,
struct qos_info *qos, __u32 max_seg_size,
__u8 max_header_size,
struct sk_buff *skb)
{
struct iriap_cb *self;
self = instance;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(skb != NULL, return;);
self->max_data_size = max_seg_size;
self->max_header_size = max_header_size;
del_timer(&self->watchdog_timer);
iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
/* Drop reference count - see state_s_make_call(). */
dev_kfree_skb(skb);
}
/*
* Function iriap_connect_indication ( handle, skb)
*
* Remote LM-IAS is requesting connection
*
*/
static void iriap_connect_indication(void *instance, void *sap,
struct qos_info *qos, __u32 max_seg_size,
__u8 max_header_size,
struct sk_buff *skb)
{
struct iriap_cb *self, *new;
IRDA_DEBUG(1, "%s()\n", __func__);
self = instance;
IRDA_ASSERT(skb != NULL, return;);
IRDA_ASSERT(self != NULL, goto out;);
IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
/* Start new server */
new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
if (!new) {
IRDA_DEBUG(0, "%s(), open failed\n", __func__);
goto out;
}
/* Now attach up the new "socket" */
new->lsap = irlmp_dup(self->lsap, new);
if (!new->lsap) {
IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
goto out;
}
new->max_data_size = max_seg_size;
new->max_header_size = max_header_size;
/* Clean up the original one to keep it in listen state */
irlmp_listen(self->lsap);
iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
out:
/* Drop reference count - see state_r_disconnect(). */
dev_kfree_skb(skb);
}
/*
* Function iriap_data_indication (handle, skb)
*
* Receives data from connection identified by handle from IrLMP
*
*/
static int iriap_data_indication(void *instance, void *sap,
struct sk_buff *skb)
{
struct iriap_cb *self;
__u8 *frame;
__u8 opcode;
IRDA_DEBUG(3, "%s()\n", __func__);
self = instance;
IRDA_ASSERT(skb != NULL, return 0;);
IRDA_ASSERT(self != NULL, goto out;);
IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
frame = skb->data;
if (self->mode == IAS_SERVER) {
/* Call server */
IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
goto out;
}
opcode = frame[0];
if (~opcode & IAP_LST) {
IRDA_WARNING("%s:, IrIAS multiframe commands or "
"results is not implemented yet!\n",
__func__);
goto out;
}
/* Check for ack frames since they don't contain any data */
if (opcode & IAP_ACK) {
IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
goto out;
}
opcode &= ~IAP_LST; /* Mask away LST bit */
switch (opcode) {
case GET_INFO_BASE:
IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
break;
case GET_VALUE_BY_CLASS:
iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
switch (frame[1]) {
case IAS_SUCCESS:
iriap_getvaluebyclass_confirm(self, skb);
break;
case IAS_CLASS_UNKNOWN:
IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
/* Finished, close connection! */
iriap_disconnect_request(self);
/*
* Warning, the client might close us, so remember
* no to use self anymore after calling confirm
*/
if (self->confirm)
self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
self->priv);
break;
case IAS_ATTRIB_UNKNOWN:
IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
/* Finished, close connection! */
iriap_disconnect_request(self);
/*
* Warning, the client might close us, so remember
* no to use self anymore after calling confirm
*/
if (self->confirm)
self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
self->priv);
break;
}
break;
default:
IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
opcode);
break;
}
out:
/* Cleanup - sub-calls will have done skb_get() as needed. */
dev_kfree_skb(skb);
return 0;
}
/*
* Function iriap_call_indication (self, skb)
*
* Received call to server from peer LM-IAS
*
*/
void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
{
__u8 *fp;
__u8 opcode;
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
IRDA_ASSERT(skb != NULL, return;);
fp = skb->data;
opcode = fp[0];
if (~opcode & 0x80) {
IRDA_WARNING("%s: IrIAS multiframe commands or results "
"is not implemented yet!\n", __func__);
return;
}
opcode &= 0x7f; /* Mask away LST bit */
switch (opcode) {
case GET_INFO_BASE:
IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
__func__);
break;
case GET_VALUE_BY_CLASS:
iriap_getvaluebyclass_indication(self, skb);
break;
}
/* skb will be cleaned up in iriap_data_indication */
}
/*
* Function iriap_watchdog_timer_expired (data)
*
* Query has taken too long time, so abort
*
*/
static void iriap_watchdog_timer_expired(void *data)
{
struct iriap_cb *self = (struct iriap_cb *) data;
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
/* iriap_close(self); */
}
#ifdef CONFIG_PROC_FS
static const char *const ias_value_types[] = {
"IAS_MISSING",
"IAS_INTEGER",
"IAS_OCT_SEQ",
"IAS_STRING"
};
static inline struct ias_object *irias_seq_idx(loff_t pos)
{
struct ias_object *obj;
for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
if (pos-- == 0)
break;
}
return obj;
}
static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
{
spin_lock_irq(&irias_objects->hb_spinlock);
return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
}
static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
++*pos;
return (v == SEQ_START_TOKEN)
? (void *) hashbin_get_first(irias_objects)
: (void *) hashbin_get_next(irias_objects);
}
static void irias_seq_stop(struct seq_file *seq, void *v)
{
spin_unlock_irq(&irias_objects->hb_spinlock);
}
static int irias_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
seq_puts(seq, "LM-IAS Objects:\n");
else {
struct ias_object *obj = v;
struct ias_attrib *attrib;
IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
seq_printf(seq, "name: %s, id=%d\n",
obj->name, obj->id);
/* Careful for priority inversions here !
* All other uses of attrib spinlock are independent of
* the object spinlock, so we are safe. Jean II */
spin_lock(&obj->attribs->hb_spinlock);
/* List all attributes for this object */
for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
attrib != NULL;
attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
goto outloop; );
seq_printf(seq, " - Attribute name: \"%s\", ",
attrib->name);
seq_printf(seq, "value[%s]: ",
ias_value_types[attrib->value->type]);
switch (attrib->value->type) {
case IAS_INTEGER:
seq_printf(seq, "%d\n",
attrib->value->t.integer);
break;
case IAS_STRING:
seq_printf(seq, "\"%s\"\n",
attrib->value->t.string);
break;
case IAS_OCT_SEQ:
seq_printf(seq, "octet sequence (%d bytes)\n",
attrib->value->len);
break;
case IAS_MISSING:
seq_puts(seq, "missing\n");
break;
default:
seq_printf(seq, "type %d?\n",
attrib->value->type);
}
seq_putc(seq, '\n');
}
IRDA_ASSERT_LABEL(outloop:)
spin_unlock(&obj->attribs->hb_spinlock);
}
return 0;
}
static const struct seq_operations irias_seq_ops = {
.start = irias_seq_start,
.next = irias_seq_next,
.stop = irias_seq_stop,
.show = irias_seq_show,
};
static int irias_seq_open(struct inode *inode, struct file *file)
{
IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
return seq_open(file, &irias_seq_ops);
}
const struct file_operations irias_seq_fops = {
.owner = THIS_MODULE,
.open = irias_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
#endif /* PROC_FS */