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Line 43... Line 43...
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#define NAME    "NS"
44
#define NAME    "NS"
45
 
45
 
46
#define NS_HASH_TABLE_CHAINS    20
46
#define NS_HASH_TABLE_CHAINS    20
47
 
47
 
-
 
48
static int register_service(ipcarg_t service, ipcarg_t phone, ipc_call_t *call);
-
 
49
static int connect_to_service(ipcarg_t service, ipc_call_t *call, ipc_callid_t callid);
-
 
50
 
48
/* Static functions implementing NS hash table operations. */
51
/* Static functions implementing NS hash table operations. */
49
static hash_index_t ns_hash(unsigned long *key);
52
static hash_index_t ns_hash(unsigned long *key);
50
static int ns_compare(unsigned long *key, hash_count_t keys, link_t *item);
53
static int ns_compare(unsigned long *key, hash_count_t keys, link_t *item);
-
 
54
static void ns_remove(link_t *item);
51
 
55
 
52
/** Operations for NS hash table. */
56
/** Operations for NS hash table. */
53
static hash_table_operations_t ns_hash_table_ops = {
57
static hash_table_operations_t ns_hash_table_ops = {
54
    .hash = ns_hash,
58
    .hash = ns_hash,
55
    .compare = ns_compare,
59
    .compare = ns_compare,
56
    .remove_callback = NULL
60
    .remove_callback = ns_remove
57
};
61
};
58
 
62
 
59
/** NS hash table structure. */
63
/** NS hash table structure. */
60
static hash_table_t ns_hash_table;
64
static hash_table_t ns_hash_table;
61
 
65
 
62
/** NS hash table item. */
66
/** NS hash table item. */
63
typedef struct {
67
typedef struct {
64
    link_t link;
68
    link_t link;
65
    ipcarg_t service;       /**< Number of the service. */
69
    ipcarg_t service;       /**< Number of the service. */
66
    ipcarg_t phone;         /**< Phone registered with the service. */
70
    ipcarg_t phone;         /**< Phone registered with the service. */
-
 
71
    ipcarg_t in_phone_hash;     /**< Incoming phone hash. */
67
} hashed_service_t;
72
} hashed_service_t;
68
 
73
 
69
/*
74
/*
70
irq_cmd_t msim_cmds[1] = {
75
irq_cmd_t msim_cmds[1] = {
71
    { CMD_MEM_READ_1, (void *)0xB0000000, 0 }
76
    { CMD_MEM_READ_1, (void *)0xB0000000, 0 }
Line 98... Line 103...
98
   
103
   
99
    ipcarg_t retval, arg1, arg2;
104
    ipcarg_t retval, arg1, arg2;
100
 
105
 
101
    printf("%s: Name service started.\n", NAME);
106
    printf("%s: Name service started.\n", NAME);
102
   
107
   
103
    if (!hash_table_create(&ns_hash_table, NS_HASH_TABLE_CHAINS, 1, &ns_hash_table_ops)) {
108
    if (!hash_table_create(&ns_hash_table, NS_HASH_TABLE_CHAINS, 3, &ns_hash_table_ops)) {
104
        printf("%s: cannot create hash table\n", NAME);
109
        printf("%s: cannot create hash table\n", NAME);
105
        return ENOMEM;
110
        return ENOMEM;
106
    }
111
    }
107
   
112
   
108
   
113
   
109
//  ipc_register_irq(2, &msim_kbd);
114
//  ipc_register_irq(2, &msim_kbd);
110
//  ipc_register_irq(1, &i8042_kbd);
115
//  ipc_register_irq(1, &i8042_kbd);
111
    while (1) {
116
    while (1) {
112
        callid = ipc_wait_for_call(&call, 0);
117
        callid = ipc_wait_for_call(&call, 0);
113
        printf("NS: Call phone=%lX...", call.phoneid);
118
        printf("NS: Call in_phone_hash=%lX...", call.in_phone_hash);
114
        switch (IPC_GET_METHOD(call)) {
119
        switch (IPC_GET_METHOD(call)) {
115
        case IPC_M_AS_SEND:
120
        case IPC_M_AS_SEND:
116
            as = (char *)IPC_GET_ARG2(call);
121
            as = (char *)IPC_GET_ARG2(call);
117
            printf("Received as: %P, size:%d\n", as, IPC_GET_ARG3(call));
122
            printf("Received as: %P, size:%d\n", as, IPC_GET_ARG3(call));
118
            retval = ipc_answer(callid, 0,(sysarg_t)(1024*1024), 0);
123
            retval = ipc_answer(callid, 0,(sysarg_t)(1024*1024), 0);
Line 128... Line 133...
128
            break;
133
            break;
129
        case IPC_M_PHONE_HUNGUP:
134
        case IPC_M_PHONE_HUNGUP:
130
            printf("Phone hung up.\n");
135
            printf("Phone hung up.\n");
131
            retval = 0;
136
            retval = 0;
132
            break;
137
            break;
133
        case IPC_M_CONNECT_TO_ME:;
138
        case IPC_M_CONNECT_TO_ME:
134
            /*
139
            /*
135
             * Request for registration of a service.
140
             * Server requests service registration.
136
             */
141
             */
137
            ipcarg_t service;
-
 
138
            ipcarg_t phone;
-
 
139
            hashed_service_t *hs;
-
 
140
           
-
 
141
            service = IPC_GET_ARG1(call);
142
            retval = register_service(IPC_GET_ARG1(call), IPC_GET_ARG3(call), &call);
142
            phone = IPC_GET_ARG3(call);
143
            ping_phone = IPC_GET_ARG3(call);
143
            printf("Registering service %d on phone %d...", service, phone);
-
 
144
           
-
 
145
            hs = (hashed_service_t *) malloc(sizeof(hashed_service_t));
-
 
146
            if (!hs) {
-
 
147
                printf("Failed to register service %d.\n", service);
-
 
148
            }
-
 
149
           
-
 
150
            link_initialize(&hs->link);
-
 
151
            hs->service = service;
-
 
152
            hs->phone = phone;
-
 
153
            hash_table_insert(&ns_hash_table, (unsigned long *) &service, &hs->link);
-
 
154
           
-
 
155
            ping_phone = phone;
-
 
156
            retval = 0;
-
 
157
            break;
144
            break;
158
        case IPC_M_CONNECT_ME_TO:
145
        case IPC_M_CONNECT_ME_TO:
-
 
146
            /*
159
            printf("Connectme(%P)to: %zd\n",
147
             * Client requests to be connected to a service.
-
 
148
             */
160
                   IPC_GET_ARG3(call), IPC_GET_ARG1(call));
149
            retval = connect_to_service(IPC_GET_ARG1(call), &call, callid);
161
            retval = 0;
-
 
162
            break;
150
            break;
163
        case NS_PING:
151
        case NS_PING:
164
            printf("Ping...%P %P\n", IPC_GET_ARG1(call),
152
            printf("Ping...%P %P\n", IPC_GET_ARG1(call),
165
                   IPC_GET_ARG2(call));
153
                   IPC_GET_ARG2(call));
166
            retval = 0;
154
            retval = 0;
Line 186... Line 174...
186
            ipc_answer(callid, retval, arg1, arg2);
174
            ipc_answer(callid, retval, arg1, arg2);
187
        }
175
        }
188
    }
176
    }
189
}
177
}
190
 
178
 
-
 
179
/** Register server.
-
 
180
 *
-
 
181
 * @param service Service to be registered.
-
 
182
 * @param phone phone Phone to be used for connections to the service.
-
 
183
 * @param call Pointer to call structure.
-
 
184
 *
-
 
185
 * @return Zero on success or a value from @ref errno.h.
-
 
186
 */
-
 
187
int register_service(ipcarg_t service, ipcarg_t phone, ipc_call_t *call)
-
 
188
{
-
 
189
    unsigned long keys[3] = { service, call->in_phone_hash, 0 };
-
 
190
    hashed_service_t *hs;
-
 
191
           
-
 
192
    printf("Registering service %d on phone %d...", service, phone);
-
 
193
 
-
 
194
    if (hash_table_find(&ns_hash_table, keys)) {
-
 
195
        printf("Service %d already registered.\n", service);
-
 
196
        return EEXISTS;
-
 
197
    }
-
 
198
           
-
 
199
    hs = (hashed_service_t *) malloc(sizeof(hashed_service_t));
-
 
200
    if (!hs) {
-
 
201
        printf("Failed to register service %d.\n", service);
-
 
202
        return ENOMEM;
-
 
203
    }
-
 
204
           
-
 
205
    link_initialize(&hs->link);
-
 
206
    hs->service = service;
-
 
207
    hs->phone = phone;
-
 
208
    hs->in_phone_hash = call->in_phone_hash;
-
 
209
    hash_table_insert(&ns_hash_table, keys, &hs->link);
-
 
210
           
-
 
211
    return 0;
-
 
212
}
-
 
213
 
-
 
214
/** Connect client to service.
-
 
215
 *
-
 
216
 * @param service Service to be connected to.
-
 
217
 * @param call Pointer to call structure.
-
 
218
 * @param callid Call ID of the request.
-
 
219
 *
-
 
220
 * @return Zero on success or a value from @ref errno.h.
-
 
221
 */
-
 
222
int connect_to_service(ipcarg_t service, ipc_call_t *call, ipc_callid_t callid)
-
 
223
{
-
 
224
    unsigned long keys[3] = { service, 0, 0 };
-
 
225
    link_t *hlp;
-
 
226
    hashed_service_t *hs;
-
 
227
           
-
 
228
    hlp = hash_table_find(&ns_hash_table, keys);
-
 
229
    if (!hlp) {
-
 
230
        printf("Service %d noty registered.\n", service);
-
 
231
        return ENOENT;
-
 
232
    }
-
 
233
    hs = hash_table_get_instance(hlp, hashed_service_t, link);
-
 
234
    printf("Connecting in_phone_hash=%lX to service at phone %d...", call->in_phone_hash, hs->phone);
-
 
235
    return ipc_forward_fast(callid, hs->phone, 0, 0);
-
 
236
}
-
 
237
 
191
/** Compute hash index into NS hash table.
238
/** Compute hash index into NS hash table.
192
 *
239
 *
193
 * @param key Pointer to single key (i.e. service number).
240
 * @param key Pointer keys. However, only the first key (i.e. service number)
-
 
241
 *        is used to compute the hash index.
194
 * @return Hash index corresponding to *key.
242
 * @return Hash index corresponding to key[0].
195
 */
243
 */
196
hash_index_t ns_hash(unsigned long *key)
244
hash_index_t ns_hash(unsigned long *key)
197
{
245
{
198
    assert(key);
246
    assert(key);
199
    return *key % NS_HASH_TABLE_CHAINS;
247
    return *key % NS_HASH_TABLE_CHAINS;
200
}
248
}
201
 
249
 
202
/** Compare a key with hashed item.
250
/** Compare a key with hashed item.
203
 *
251
 *
-
 
252
 * This compare function always ignores the third key.
-
 
253
 * It exists only to make it possible to remove records
-
 
254
 * originating from connection with key[1] in_phone_hash
-
 
255
 * value. Note that this is close to being classified
-
 
256
 * as a nasty hack.
-
 
257
 *
204
 * @param key Single key pointer.
258
 * @param key Array of keys.
205
 * @param keys Must be 1.
259
 * @param keys Must be lesser or equal to 3.
206
 * @param item Pointer to a hash table item.
260
 * @param item Pointer to a hash table item.
207
 * @return Non-zero if the key matches the item, zero otherwise.
261
 * @return Non-zero if the key matches the item, zero otherwise.
208
 */
262
 */
209
int ns_compare(unsigned long *key, hash_count_t keys, link_t *item)
263
int ns_compare(unsigned long key[], hash_count_t keys, link_t *item)
210
{
264
{
211
    hashed_service_t *hs;
265
    hashed_service_t *hs;
212
 
266
 
213
    assert(key);
267
    assert(key);
214
    assert(keys == 1);
268
    assert(keys <= 3);
215
    assert(item);
269
    assert(item);
216
   
270
   
217
    hs = hash_table_get_instance(item, hashed_service_t, link);
271
    hs = hash_table_get_instance(item, hashed_service_t, link);
218
   
272
   
-
 
273
    if (keys == 2)
-
 
274
        return key[1] == hs->in_phone_hash;
-
 
275
    else
219
    return *key == hs->service;
276
        return key[0] == hs->service;
-
 
277
}
-
 
278
 
-
 
279
/** Perform actions after removal of item from the hash table.
-
 
280
 *
-
 
281
 * @param item Item that was removed from the hash table.
-
 
282
 */
-
 
283
void ns_remove(link_t *item)
-
 
284
{
-
 
285
    assert(item);
-
 
286
    free(hash_table_get_instance(item, hashed_service_t, link));
220
}
287
}