ClabureDB: Classified Bug-Reports Database

   /*********************************************************************
    *
    * 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 Troms�� 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 <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 *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);
  }
  
  /*
   * 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;
         }
 
         /*
          *  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
  */
 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\n", __func__, irlmp_reasons[reason]);
 
         self = (struct iriap_cb *) 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 %s, not supported\n",
                                    __func__, ias_charset_types[charset]);
 
                         /* 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 */
                 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++];
         memcpy(name, fp+n, name_len); n+=name_len;
         name[name_len] = '\0';
 
         attr_len = fp[n++];
         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);
 
         return;
 }
 
 /*
  * 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 = (struct iriap_cb *) 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 = (struct iriap_cb *) 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 = (struct iriap_cb *) 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 *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 */