WebSVN – HelenOS-historic – Diff – /uspace/trunk/ns/ns.c

+/*
+ * Copyright (C) 2006 Ondrej Palkovsky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/**
+ * @file    ns.c
+ * @brief   Naming service for HelenOS IPC.
+ */
 #include <ipc.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <ns.h>
 #include <errno.h>
+#include <assert.h>
+#include <libadt/list.h>
+#include <libadt/hash_table.h>
+#define NAME    "NS"
+#define NS_HASH_TABLE_CHAINS    20
+/* Static functions implementing NS hash table operations. */
+static hash_index_t ns_hash(unsigned long *key);
+static int ns_compare(unsigned long *key, hash_count_t keys, link_t *item);
+/** Operations for NS hash table. */
+static hash_table_operations_t ns_hash_table_ops = {
+    .hash = ns_hash,
+    .compare = ns_compare,
+    .remove_callback = NULL
+};
+/** NS hash table structure. */
+static hash_table_t ns_hash_table;
+/** NS hash table item. */
+typedef struct {
+    link_t link;
+    ipcarg_t service;       /**< Number of the service. */
+    ipcarg_t phone;         /**< Phone registered with the service. */
+} hashed_service_t;
 /*
 irq_cmd_t msim_cmds[1] = {
     { CMD_MEM_READ_1, (void *)0xB0000000, 0 }
 };
 ,
     i8042_cmds
 };
 */
-static int service;
+int static ping_phone;
 int main(int argc, char **argv)
+{
     ipc_call_t call;
     ipc_callid_t callid;
     char *as;
     ipcarg_t retval, arg1, arg2;
-    printf("NS:Name service started.\n");
+    printf("%s: Name service started.\n", NAME);
+    if (!hash_table_create(&ns_hash_table, NS_HASH_TABLE_CHAINS, 1, &ns_hash_table_ops)) {
+        printf("%s: cannot create hash table\n", NAME);
+        return ENOMEM;
+    }
 //  ipc_register_irq(2, &msim_kbd);
 //  ipc_register_irq(1, &i8042_kbd);
     while (1) {
         callid = ipc_wait_for_call(&call, 0);
-        printf("NS:Call phone=%lX..", call.phoneid);
+        printf("NS: Call phone=%lX...", call.phoneid);
         switch (IPC_GET_METHOD(call)) {
         case IPC_M_AS_SEND:
             as = (char *)IPC_GET_ARG2(call);
             printf("Received as: %P, size:%d\n", as, IPC_GET_ARG3(call));
             retval = ipc_answer(callid, 0,(sysarg_t)(1024*1024), 0);
             break;
         case IPC_M_PHONE_HUNGUP:
             printf("Phone hung up.\n");
             retval = 0;
             break;
-        case IPC_M_CONNECT_TO_ME:
+        case IPC_M_CONNECT_TO_ME:;
+            /*
+             * Request for registration of a service.
+             */
+            ipcarg_t service;
+            ipcarg_t phone;
+            hashed_service_t *hs;
-            printf("Somebody connecting phid=%zd.\n", IPC_GET_ARG3(call));
+            service = IPC_GET_ARG1(call);
-            service = IPC_GET_ARG3(call);
+            phone = IPC_GET_ARG3(call);
+            printf("Registering service %d on phone %d...", service, phone);
+            hs = (hashed_service_t *) malloc(sizeof(hashed_service_t));
+            if (!hs) {
+                printf("Failed to register service %d.\n", service);
+            }
+            link_initialize(&hs->link);
+            hs->service = service;
+            hs->phone = phone;
+            hash_table_insert(&ns_hash_table, (unsigned long *) &service, &hs->link);
+            ping_phone = phone;
             retval = 0;
             break;
         case IPC_M_CONNECT_ME_TO:
             printf("Connectme(%P)to: %zd\n",
                    IPC_GET_ARG3(call), IPC_GET_ARG1(call));
         case NS_HANGUP:
             printf("Closing connection.\n");
             retval = EHANGUP;
             break;
         case NS_PING_SVC:
-            printf("NS:Pinging service %d\n", service);
+            printf("NS:Pinging service %d\n", ping_phone);
-            ipc_call_sync(service, NS_PING, 0xbeef, 0);
+            ipc_call_sync(ping_phone, NS_PING, 0xbeef, 0);
             printf("NS:Got pong\n");
             break;
         default:
             printf("Unknown method: %zd\n", IPC_GET_METHOD(call));
             retval = ENOENT;
             break;
+        }
         if (! (callid & IPC_CALLID_NOTIFICATION)) {
-            printf("Answerinh\n");
+            printf("Answering.\n");
             ipc_answer(callid, retval, arg1, arg2);
+        }
+    }
+}
+/** Compute hash index into NS hash table.
+ *
+ * @param key Pointer to single key (i.e. service number).
+ * @return Hash index corresponding to *key.
+ */
+hash_index_t ns_hash(unsigned long *key)
+{
+    assert(key);
+    return *key % NS_HASH_TABLE_CHAINS;
+}
+/** Compare a key with hashed item.
+ *
+ * @param key Single key pointer.
+ * @param keys Must be 1.
+ * @param item Pointer to a hash table item.
+ * @return Non-zero if the key matches the item, zero otherwise.
+ */
+int ns_compare(unsigned long *key, hash_count_t keys, link_t *item)
+{
+    hashed_service_t *hs;
+    assert(key);
+    assert(keys == 1);
+    assert(item);
+    hs = hash_table_get_instance(item, hashed_service_t, link);
+    return *key == hs->service;
+}

Subversion Repositories HelenOS-historic

(root)/uspace/trunk/ns/ns.c @ 1719 – Rev 1330 → 1335