modify nuttx bug of lack of files

2021-06-11 11:25:07 +08:00
parent 4a7f51a5e9
commit 6d0f2ca39a
6752 changed files with 1528133 additions and 0 deletions
@@ -0,0 +1,258 @@
+/****************************************************************************
+ * net/icmp/icmp_conn.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <arch/irq.h>
+
+#include <nuttx/semaphore.h>
+#include <nuttx/net/netconfig.h>
+#include <nuttx/net/net.h>
+#include <nuttx/net/netdev.h>
+
+#include "devif/devif.h"
+#include "icmp/icmp.h"
+
+#ifdef CONFIG_NET_ICMP_SOCKET
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* The array containing all IPPROTO_ICMP socket connections */
+
+static struct icmp_conn_s g_icmp_connections[CONFIG_NET_ICMP_NCONNS];
+
+/* A list of all free IPPROTO_ICMP socket connections */
+
+static dq_queue_t g_free_icmp_connections;
+static sem_t g_free_sem;
+
+/* A list of all allocated IPPROTO_ICMP socket connections */
+
+static dq_queue_t g_active_icmp_connections;
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: icmp_sock_initialize
+ *
+ * Description:
+ *   Initialize the IPPROTO_ICMP socket connection structures.  Called once
+ *   and only from the network initialization layer.
+ *
+ ****************************************************************************/
+
+void icmp_sock_initialize(void)
+{
+  int i;
+
+  /* Initialize the queues */
+
+  dq_init(&g_free_icmp_connections);
+  dq_init(&g_active_icmp_connections);
+  nxsem_init(&g_free_sem, 0, 1);
+
+  for (i = 0; i < CONFIG_NET_ICMP_NCONNS; i++)
+    {
+      /* Move the connection structure to the free list */
+
+      dq_addlast(&g_icmp_connections[i].node, &g_free_icmp_connections);
+    }
+}
+
+/****************************************************************************
+ * Name: icmp_alloc
+ *
+ * Description:
+ *   Allocate a new, uninitialized IPPROTO_ICMP socket connection structure.
+ *   This is normally something done by the implementation of the socket()
+ *   interface.
+ *
+ ****************************************************************************/
+
+FAR struct icmp_conn_s *icmp_alloc(void)
+{
+  FAR struct icmp_conn_s *conn = NULL;
+  int ret;
+
+  /* The free list is protected by a semaphore (that behaves like a mutex). */
+
+  ret = net_lockedwait(&g_free_sem);
+  if (ret >= 0)
+    {
+      conn = (FAR struct icmp_conn_s *)dq_remfirst(&g_free_icmp_connections);
+      if (conn != NULL)
+        {
+          /* Clear the connection structure */
+
+          memset(conn, 0, sizeof(struct icmp_conn_s));
+
+          /* Enqueue the connection into the active list */
+
+          dq_addlast(&conn->node, &g_active_icmp_connections);
+        }
+
+      nxsem_post(&g_free_sem);
+    }
+
+  return conn;
+}
+
+/****************************************************************************
+ * Name: icmp_free
+ *
+ * Description:
+ *   Free a IPPROTO_ICMP socket connection structure that is no longer in
+ *   use.  This should be done by the implementation of close().
+ *
+ ****************************************************************************/
+
+void icmp_free(FAR struct icmp_conn_s *conn)
+{
+  /* The free list is protected by a semaphore (that behaves like a mutex). */
+
+  DEBUGASSERT(conn->crefs == 0);
+
+  /* Take the semaphore (perhaps waiting) */
+
+  net_lockedwait_uninterruptible(&g_free_sem);
+
+  /* Is this the last reference on the connection?  It might not be if the
+   * socket was cloned.
+   */
+
+  if (conn->crefs > 1)
+    {
+      /* No.. just decrement the reference count */
+
+      conn->crefs--;
+    }
+  else
+    {
+      /* Remove the connection from the active list */
+
+      dq_rem(&conn->node, &g_active_icmp_connections);
+
+      /* Free the connection */
+
+      dq_addlast(&conn->node, &g_free_icmp_connections);
+      nxsem_post(&g_free_sem);
+    }
+}
+
+/****************************************************************************
+ * Name: icmp_active()
+ *
+ * Description:
+ *   Find a connection structure that is the appropriate connection to be
+ *   used with the provided ECHO request ID.
+ *
+ * Assumptions:
+ *   This function is called from network logic at with the network locked.
+ *
+ ****************************************************************************/
+
+FAR struct icmp_conn_s *icmp_active(uint16_t id)
+{
+  FAR struct icmp_conn_s *conn =
+    (FAR struct icmp_conn_s *)g_active_icmp_connections.head;
+
+  while (conn != NULL)
+    {
+      /* FIXME lmac in conn should have been set by icmp_bind() */
+
+      if (id == conn->id)
+        {
+          /* Matching connection found.. return a reference to it */
+
+          break;
+        }
+
+      /* Look at the next active connection */
+
+      conn = (FAR struct icmp_conn_s *)conn->node.flink;
+    }
+
+  return conn;
+}
+
+/****************************************************************************
+ * Name: icmp_nextconn
+ *
+ * Description:
+ *   Traverse the list of allocated packet connections
+ *
+ * Assumptions:
+ *   This function is called from network logic at with the network locked.
+ *
+ ****************************************************************************/
+
+FAR struct icmp_conn_s *icmp_nextconn(FAR struct icmp_conn_s *conn)
+{
+  if (conn == NULL)
+    {
+      return (FAR struct icmp_conn_s *)g_active_icmp_connections.head;
+    }
+  else
+    {
+      return (FAR struct icmp_conn_s *)conn->node.flink;
+    }
+}
+
+/****************************************************************************
+ * Name: icmp_findconn
+ *
+ * Description:
+ *   Find an ICMP connection structure that is expecting a ICMP ECHO response
+ *   with this ID from this device
+ *
+ * Assumptions:
+ *   This function is called from network logic at with the network locked.
+ *
+ ****************************************************************************/
+
+FAR struct icmp_conn_s *icmp_findconn(FAR struct net_driver_s *dev,
+                                      uint16_t id)
+{
+  FAR struct icmp_conn_s *conn;
+
+  for (conn = icmp_nextconn(NULL); conn != NULL; conn = icmp_nextconn(conn))
+    {
+      if (conn->id == id && conn->dev == dev && conn->nreqs > 0)
+        {
+          return conn;
+        }
+    }
+
+  return conn;
+}
+#endif /* CONFIG_NET_ICMP */