Merge pull request #3030 from enkiller/pr

[components][net][sal]修复多线程访问创建相同fd的问题

components/net/sal_socket/src/sal_socket.c

@@ -316,10 +316,7 @@ struct sal_socket *sal_get_socket(int socket)
 
     socket = socket - SAL_SOCKET_OFFSET;
     /* check socket structure valid or not */
-    if (st->sockets[socket]->magic != SAL_SOCKET_MAGIC)
+    RT_ASSERT(st->sockets[socket]->magic == SAL_SOCKET_MAGIC);
-    {
-        return RT_NULL;
-    }
 
     return st->sockets[socket];
 }
@@ -376,7 +373,8 @@ int sal_netdev_cleanup(struct netdev *netdev)
         {
             rt_thread_mdelay(rt_tick_from_millisecond(100));
         }
-    } while (find_dev);
+    }
+    while (find_dev);
 
     return 0;
 }
@@ -452,8 +450,7 @@ static int socket_alloc(struct sal_socket_table *st, int f_socket)
     /* find an empty socket entry */
     for (idx = f_socket; idx < (int) st->max_socket; idx++)
     {
-        if (st->sockets[idx] == RT_NULL || 
+        if (st->sockets[idx] == RT_NULL)
-                st->sockets[idx]->netdev == RT_NULL)
         {
             break;
         }
@@ -497,6 +494,15 @@ __result:
     return idx;
 }
 
+static void socket_free(struct sal_socket_table *st, int idx)
+{
+    struct sal_socket *sock;
+
+    sock = st->sockets[idx];
+    st->sockets[idx] = RT_NULL;
+    rt_free(sock);
+}
+
 static int socket_new(void)
 {
     struct sal_socket *sock;
@@ -529,6 +535,26 @@ __result:
     return idx + SAL_SOCKET_OFFSET;
 }
 
+static void socket_delete(int socket)
+{
+    struct sal_socket *sock;
+    struct sal_socket_table *st = &socket_table;
+    int idx;
+
+    idx = socket - SAL_SOCKET_OFFSET;
+    if (idx < 0 || idx >= (int) st->max_socket)
+    {
+        return;
+    }
+    sal_lock();
+    sock = sal_get_socket(socket);
+    RT_ASSERT(sock != RT_NULL);
+    sock->magic = 0;
+    sock->netdev = RT_NULL;
+    socket_free(st, idx);
+    sal_unlock();
+}
+
 int sal_accept(int socket, struct sockaddr *addr, socklen_t *addrlen)
 {
     int new_socket;
@@ -550,18 +576,20 @@ int sal_accept(int socket, struct sockaddr *addr, socklen_t *addrlen)
 
         /* allocate a new socket structure and registered socket options */
         new_sal_socket = socket_new();
-        if (new_sal_socket < 0)
+        new_sock = sal_get_socket(new_sal_socket);
+        if (new_sock == RT_NULL)
         {
             pf->skt_ops->closesocket(new_socket);
             return -1;
         }
-        new_sock = sal_get_socket(new_sal_socket);
 
         retval = socket_init(sock->domain, sock->type, sock->protocol, &new_sock);
         if (retval < 0)
         {
             pf->skt_ops->closesocket(new_socket);
             rt_memset(new_sock, 0x00, sizeof(struct sal_socket));
+            /* socket init failed, delete socket */
+            socket_delete(new_sal_socket);
             LOG_E("New socket registered failed, return error %d.", retval);
             return -1;
         }
@@ -673,9 +701,8 @@ int sal_shutdown(int socket, int how)
         error = -1;
     }
 
-    /* free socket */
+    /* delete socket */
-    rt_free(sock);
+    socket_delete(socket);
-    socket_table.sockets[socket] = RT_NULL;
 
     return error;
 }
@@ -907,6 +934,7 @@ int sal_socket(int domain, int type, int protocol)
     if (retval < 0)
     {
         LOG_E("SAL socket protocol family input failed, return error %d.", retval);
+        socket_delete(socket);
         return -1;
     }
 
@@ -922,6 +950,7 @@ int sal_socket(int domain, int type, int protocol)
             sock->user_data_tls = proto_tls->ops->socket(socket);
             if (sock->user_data_tls == RT_NULL)
             {
+                socket_delete(socket);
                 return -1;
             }
         }
@@ -964,9 +993,8 @@ int sal_closesocket(int socket)
         error = -1;
     }
 
-    /* free socket */
+    /* delete socket */
-    rt_free(sock);        
+    socket_delete(socket);
-    socket_table.sockets[socket] = RT_NULL;
 
     return error;
 }