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.
 *     
 *     This program is free software; you can redistribute it and/or 
 *     modify it under the terms of the GNU General Public License as 
 *     published by the Free Software Foundation; either version 2 of 
 *     the License, or (at your option) any later version.
 *
 *     Neither Dag Brattli nor University of Tromsø admit liability nor
 *     provide warranty for any of this software. This material is 
 *     provided "AS-IS" and at no charge.
 *
 ********************************************************************/

#include <linux/config.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/string.h>
#include <linux/init.h>

#include <asm/byteorder.h>
#include <asm/unaligned.h>

#include <net/irda/irda.h>
#include <net/irda/irttp.h>
#include <net/irda/irmod.h>
#include <net/irda/irlmp.h>
#include <net/irda/irias_object.h>
#include <net/irda/iriap_event.h>
#include <net/irda/iriap.h>

/* 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"
};

static hashbin_t *iriap = NULL;
static __u32 service_handle; 

extern char *lmp_reasons[];

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);

/*
 * 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_LOCAL);
        if (!iriap)
                return -ENOMEM;

        objects = hashbin_new(HB_LOCAL);
        if (!objects) {
                WARNING(__FUNCTION__ "(), Can't allocate objects hashbin!\n");
                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");

        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);
        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, __FUNCTION__ "(), unable to open server\n");
                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(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, __FUNCTION__ "()\n");

        self = kmalloc(sizeof(struct iriap_cb), GFP_ATOMIC);
        if (!self) {
                WARNING(__FUNCTION__ "(), Unable to kmalloc!\n");
                return NULL;
        }

        /*
         *  Initialize instance
         */
        memset(self, 0, sizeof(struct iriap_cb));
        
        self->magic = IAS_MAGIC;
        self->mode = mode;
        if (mode == IAS_CLIENT)
                iriap_register_lsap(self, slsap_sel, mode);

        self->confirm = callback;
        self->priv = priv;

        init_timer(&self->watchdog_timer);

        hashbin_insert(iriap, (queue_t *) self, (int) 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;
}

/*
 * Function __iriap_close (self)
 *
 *    Removes (deallocates) the IrIAP instance
 *
 */
static void __iriap_close(struct iriap_cb *self)
{
        IRDA_DEBUG(4, __FUNCTION__ "()\n");

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);

        del_timer(&self->watchdog_timer);

        if (self->skb)
                dev_kfree_skb(self->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, __FUNCTION__ "()\n");

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);

        if (self->lsap) {
                irlmp_close_lsap(self->lsap);
                self->lsap = NULL;
        }

        entry = (struct iriap_cb *) hashbin_remove(iriap, (int) self, NULL);
        ASSERT(entry == self, return;);

        __iriap_close(self);
}

static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
{
        notify_t notify;

        IRDA_DEBUG(2, __FUNCTION__ "()\n");

        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) {
                ERROR(__FUNCTION__ "(), Unable to allocated LSAP!\n");
                return -1;
        }
        self->slsap_sel = self->lsap->slsap_sel;

        return 0;
}

/*
 * Function iriap_disconnect_indication (handle, reason)
 *
 *    Got disconnect, so clean up everything assosiated with this connection
 *
 */
static void iriap_disconnect_indication(void *instance, void *sap, 
                                        LM_REASON reason, 
                                        struct sk_buff *userdata)
{
        struct iriap_cb *self;

        IRDA_DEBUG(4, __FUNCTION__ "(), reason=%s\n", lmp_reasons[reason]);

        self = (struct iriap_cb *) instance;

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);

        ASSERT(iriap != NULL, return;);

        del_timer(&self->watchdog_timer);

        if (self->mode == IAS_CLIENT) {
                IRDA_DEBUG(4, __FUNCTION__ "(), disconnect as client\n");


                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, __FUNCTION__ "(), disconnect as server\n");
                iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION, 
                                      NULL);
                iriap_close(self);
        }

        if (userdata)
                dev_kfree_skb(userdata);
}

/*
 * Function iriap_disconnect_request (handle)
 *
 *    
 *
 */
void iriap_disconnect_request(struct iriap_cb *self)
{
        struct sk_buff *skb;

        IRDA_DEBUG(4, __FUNCTION__ "()\n");

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);

        skb = dev_alloc_skb(64);
        if (skb == NULL) {
                IRDA_DEBUG(0, __FUNCTION__
                      "(), Could not allocate an sk_buff of length %d\n", 64);
                return;
        }

        /* 
         *  Reserve space for MUX control and LAP header 
         */
        skb_reserve(skb, LMP_MAX_HEADER);

        irlmp_disconnect_request(self->lsap, skb);
}

void iriap_getinfobasedetails_request(void) 
{
        IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented!\n");
}

void iriap_getinfobasedetails_confirm(void) 
{
        IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented!\n");
}

void iriap_getobjects_request(void) 
{
        IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented!\n");
}

void iriap_getobjects_confirm(void) 
{
        IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented!\n");
}

void iriap_getvalue(void) 
{
        IRDA_DEBUG(0, __FUNCTION__ "(), Not implemented!\n");
}

/*
 * Function iriap_getvaluebyclass (addr, name, attr)
 *
 *    Retreive 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 *skb;
        int name_len, attr_len;
        __u8 *frame;

        ASSERT(self != NULL, return -1;);
        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);
        
        skb = dev_alloc_skb(64);
        if (!skb)
                return -ENOMEM;

        name_len = strlen(name);
        attr_len = strlen(attr);

        /* Reserve space for MUX and LAP header */
        skb_reserve(skb, self->max_header_size);
        skb_put(skb, 3+name_len+attr_len);
        frame = 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, skb);

        return 0;
}

/*
 * Function iriap_getvaluebyclass_confirm (self, skb)
 *
 *    Got result from GetValueByClass command. Parse it and return result
 *    to service user.
 *
 */
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;

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);
        ASSERT(skb != NULL, return;);

        /* Initialize variables */
        fp = skb->data;
        n = 2;

        /* Get length, MSB first */
        len = be16_to_cpu(get_unaligned((__u16 *)(fp+n))); n += 2;

        IRDA_DEBUG(4, __FUNCTION__ "(), len=%d\n", len);

        /* Get object ID, MSB first */
        obj_id = be16_to_cpu(get_unaligned((__u16 *)(fp+n))); n += 2;

        type = fp[n++];
        IRDA_DEBUG(4, __FUNCTION__ "(), Value type = %d\n", 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, __FUNCTION__ "(), lsap=%d\n", 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, __FUNCTION__
                                   "(), charset %s, not supported\n",
                                   ias_charset_types[charset]);

                        /* Aborting, close connection! */
                        iriap_disconnect_request(self);
                        dev_kfree_skb(skb);
                        return;
                        /* break; */
                }
                value_len = fp[n++];
                IRDA_DEBUG(4, __FUNCTION__ "(), strlen=%d\n", value_len);
                ASSERT(value_len < 64, return;);
                
                /* Make sure the string is null-terminated */
                fp[n+value_len] = 0x00;
                
                IRDA_DEBUG(4, "Got string %s\n", fp+n);
                value = irias_new_string_value(fp+n);
                break;
        case IAS_OCT_SEQ:
                value_len = be16_to_cpu(get_unaligned((__u16 *)(fp+n)));
                n += 2;
                
                ASSERT(value_len <= 55, return;);      
                
                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, __FUNCTION__ "(), missing handler!\n");
                irias_delete_value(value);
        }
        dev_kfree_skb(skb);
}

/*
 * Function iriap_getvaluebyclass_response ()
 *
 *    Send answer back to remote LM-IAS
 * 
 */
void iriap_getvaluebyclass_response(struct iriap_cb *self, __u16 obj_id, 
                                    __u8 ret_code, struct ias_value *value)
{
        struct sk_buff *skb;
        int n;
        __u32 tmp_be32, tmp_be16;
        __u8 *fp;

        IRDA_DEBUG(4, __FUNCTION__ "()\n");

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);
        ASSERT(value != NULL, return;);
        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.
         */
        skb = dev_alloc_skb(value->len + self->max_header_size + 32);
        if (!skb)
                return;

        /* Reserve space for MUX and LAP header */
        skb_reserve(skb, self->max_header_size);
        skb_put(skb, 6);
        
        fp = skb->data;

        /* Build frame */
        fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
        fp[n++] = ret_code;

        /* Insert list length (MSB first) */
        tmp_be16 = __constant_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(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(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(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, __FUNCTION__ ": sending IAS_MISSING\n");
                skb_put(skb, 1);
                fp[n++] = value->type;
                break;
        default:
                IRDA_DEBUG(0, __FUNCTION__ "(), type not implemented!\n");
                break;
        }
        iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, skb);
}

/*
 * Function iriap_getvaluebyclass_indication (self, skb)
 *
 *    getvaluebyclass is requested from peer LM-IAS
 *
 */
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[64];
        char attr[64];
        __u8 *fp;
        int n;

        IRDA_DEBUG(4, __FUNCTION__ "()\n");

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);
        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';

        /* We do not need the buffer anymore */
        dev_kfree_skb(skb);

        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,
                                               &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, &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 *skb;
        __u8 *frame;

        IRDA_DEBUG(2, __FUNCTION__ "()\n");

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);

        skb = dev_alloc_skb(64);
        if (!skb)
                return;

        /* Reserve space for MUX and LAP header */
        skb_reserve(skb, self->max_header_size);
        skb_put(skb, 1);
        frame = skb->data;

        /* Build frame */
        frame[0] = IAP_LST | IAP_ACK | self->operation;

        irlmp_data_request(self->lsap, skb);
}

void iriap_connect_request(struct iriap_cb *self)
{
        int ret;

        ASSERT(self != NULL, return;);
        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, __FUNCTION__ "(), connect failed!\n");
                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 *userdata)
{
        struct iriap_cb *self;
        
        self = (struct iriap_cb *) instance;

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);
        ASSERT(userdata != 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, userdata);
}

/*
 * 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 *userdata)
{
        struct iriap_cb *self, *new;

        IRDA_DEBUG(0, __FUNCTION__ "()\n");

        self = (struct iriap_cb *) instance;

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);
        
        /* Start new server */
        new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL); 
        if (!new) {
                IRDA_DEBUG(0, __FUNCTION__ "(), open failed\n");
                dev_kfree_skb(userdata);
                return;
        }
        
        /* Now attach up the new "socket" */
        new->lsap = irlmp_dup(self->lsap, new);
        if (!new->lsap) {
                IRDA_DEBUG(0, __FUNCTION__ "(), dup failed!\n");
                return;
        }
                
        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 */
        self->lsap->dlsap_sel = LSAP_ANY;
        self->lsap->lsap_state = LSAP_DISCONNECTED;
        /* FIXME: refcount in irlmp might get wrong */
        
        iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, userdata);
}
 
/*
 * 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, __FUNCTION__ "()\n"); 
        
        self = (struct iriap_cb *) instance;

        ASSERT(self != NULL, return 0;);
        ASSERT(self->magic == IAS_MAGIC, return 0;);

        ASSERT(skb != NULL, return 0;);

        frame = skb->data;
        
        if (self->mode == IAS_SERVER) {
                /* Call server */
                IRDA_DEBUG(4, __FUNCTION__ "(), Calling server!\n");
                iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);

                return 0;
        }
        opcode = frame[0];
        if (~opcode & IAP_LST) {
                WARNING(__FUNCTION__ "(), IrIAS multiframe commands or "
                        "results is not implemented yet!\n");
                dev_kfree_skb(skb);
                return 0;
        }
        
        /* Check for ack frames since they don't contain any data */
        if (opcode & IAP_ACK) {
                IRDA_DEBUG(0, __FUNCTION__ "() Got ack frame!\n");
                dev_kfree_skb(skb);
                return 0;
        }

        opcode &= ~IAP_LST; /* Mask away LST bit */

        switch (opcode) {
        case GET_INFO_BASE:
                IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
                dev_kfree_skb(skb);
                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:
                        WARNING(__FUNCTION__ "(), No such class!\n");
                        /* 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);
                        dev_kfree_skb(skb);
                        break;
                case IAS_ATTRIB_UNKNOWN:
                        WARNING(__FUNCTION__ "(), No such attribute!\n");
                        /* 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);
                        dev_kfree_skb(skb);
                        break;
                }               
                break;
        default:
                IRDA_DEBUG(0, __FUNCTION__ "(), Unknown op-code: %02x\n", 
                           opcode);
                dev_kfree_skb(skb);
                break;
        }
        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, __FUNCTION__ "()\n");

        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);
        ASSERT(skb != NULL, return;);

        fp = skb->data;

        opcode = fp[0];
        if (~opcode & 0x80) {
                WARNING(__FUNCTION__ "(), IrIAS multiframe commands or results"
                        "is not implemented yet!\n");
                return;
        }
        opcode &= 0x7f; /* Mask away LST bit */
        
        switch (opcode) {
        case GET_INFO_BASE:
                WARNING(__FUNCTION__ 
                        "(), GetInfoBaseDetails not implemented yet!\n");
                break;
        case GET_VALUE_BY_CLASS:
                iriap_getvaluebyclass_indication(self, skb);
                break;
        }
}

/*
 * Function iriap_watchdog_timer_expired (data)
 *
 *    Query has taken to long time, so abort
 *
 */
void iriap_watchdog_timer_expired(void *data)
{
        struct iriap_cb *self = (struct iriap_cb *) data;
        
        ASSERT(self != NULL, return;);
        ASSERT(self->magic == IAS_MAGIC, return;);

        /* iriap_close(self); */
}

#ifdef CONFIG_PROC_FS

static char *ias_value_types[] = {
        "IAS_MISSING",
        "IAS_INTEGER",
        "IAS_OCT_SEQ",
        "IAS_STRING"
};

int irias_proc_read(char *buf, char **start, off_t offset, int len, int unused)
{
        struct ias_object *obj;
        struct ias_attrib *attrib;
        unsigned long flags;

        ASSERT( objects != NULL, return 0;);

        save_flags( flags);
        cli();

        len = 0;

        len += sprintf(buf+len, "LM-IAS Objects:\n");

        /* List all objects */
        obj = (struct ias_object *) hashbin_get_first(objects);
        while ( obj != NULL) {
                ASSERT(obj->magic == IAS_OBJECT_MAGIC, return 0;);

                len += sprintf(buf+len, "name: %s, ", obj->name);
                len += sprintf(buf+len, "id=%d", obj->id);
                len += sprintf(buf+len, "\n");

                /* List all attributes for this object */
                attrib = (struct ias_attrib *) 
                        hashbin_get_first(obj->attribs);
                while (attrib != NULL) {
                        ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return 0;);

                        len += sprintf(buf+len, " - Attribute name: \"%s\", ",
                                       attrib->name);
                        len += sprintf(buf+len, "value[%s]: ", 
                                       ias_value_types[attrib->value->type]);
                        
                        switch (attrib->value->type) {
                        case IAS_INTEGER:
                                len += sprintf(buf+len, "%d\n", 
                                               attrib->value->t.integer);
                                break;
                        case IAS_STRING:
                                len += sprintf(buf+len, "\"%s\"\n", 
                                               attrib->value->t.string);
                                break;
                        case IAS_OCT_SEQ:
                                len += sprintf(buf+len, "octet sequence\n");
                                break;
                        case IAS_MISSING:
                                len += sprintf(buf+len, "missing\n");
                                break;
                        default:
                                IRDA_DEBUG(0, __FUNCTION__ 
                                      "(), Unknown value type!\n");
                                return -1;
                        }
                        len += sprintf(buf+len, "\n");
                        
                        attrib = (struct ias_attrib *) 
                                hashbin_get_next(obj->attribs);
                }
                obj = (struct ias_object *) hashbin_get_next(objects);
        } 
        restore_flags(flags);

        return len;
}

#endif /* PROC_FS */

---