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diff --git a/nuttx/net/setsockopt.c b/nuttx/net/setsockopt.c
new file mode 100644
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+++ b/nuttx/net/setsockopt.c
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+/****************************************************************************
+ * net/setsockopt.c
+ *
+ *   Copyright (C) 2007, 2008, 2011-2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#if defined(CONFIG_NET) && defined(CONFIG_NET_SOCKOPTS)
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <errno.h>
+#include <arch/irq.h>
+
+#include "net_internal.h"
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: psock_setsockopt
+ *
+ * Description:
+ *   psock_setsockopt() sets the option specified by the 'option' argument,
+ *   at the protocol level specified by the 'level' argument, to the value
+ *   pointed to by the 'value' argument for the socket on the 'psock' argument.
+ *
+ *   The 'level' argument specifies the protocol level of the option. To set
+ *   options at the socket level, specify the level argument as SOL_SOCKET.
+ *
+ *   See <sys/socket.h> a complete list of values for the 'option' argument.
+ *
+ * Parameters:
+ *   psock     Socket structure of socket to operate on
+ *   level     Protocol level to set the option
+ *   option    identifies the option to set
+ *   value     Points to the argument value
+ *   value_len The length of the argument value
+ *
+ * Returned Value:
+ *  0 on success; -1 on failure
+ *
+ *  EDOM
+ *    The send and receive timeout values are too big to fit into the
+ *    timeout fields in the socket structure.
+ *  EINVAL
+ *    The specified option is invalid at the specified socket 'level' or the
+ *    socket has been shut down.
+ *  EISCONN
+ *    The socket is already connected, and a specified option cannot be set
+ *    while the socket is connected.
+ *  ENOPROTOOPT
+ *    The 'option' is not supported by the protocol.
+ *  ENOTSOCK
+ *    The 'sockfd' argument does not refer to a socket.
+ *  ENOMEM
+ *    There was insufficient memory available for the operation to complete.
+ *  ENOBUFS
+ *    Insufficient resources are available in the system to complete the
+ *    call.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int psock_setsockopt(FAR struct socket *psock, int level, int option,
+                     FAR const void *value, socklen_t value_len)
+{
+  uip_lock_t flags;
+  int err;
+
+  /* Verify that the socket option if valid (but might not be supported ) */
+
+  if (!_SO_SETVALID(option) || !value)
+    {
+      err = EINVAL;
+      goto errout;
+    }
+
+  /* Process the option */
+  switch (option)
+    {
+      /* The following options take a point to an integer boolean value.
+       * We will blindly set the bit here although the implementation
+       * is outside of the scope of setsockopt.
+       */
+
+      case SO_DEBUG:      /* Enables recording of debugging information */
+      case SO_BROADCAST:  /* Permits sending of broadcast messages */
+      case SO_REUSEADDR:  /* Allow reuse of local addresses */
+      case SO_KEEPALIVE:  /* Keeps connections active by enabling the
+                           * periodic transmission */
+      case SO_OOBINLINE:  /* Leaves received out-of-band data inline */
+      case SO_DONTROUTE:  /* Requests outgoing messages bypass standard routing */
+        {
+          int setting;
+
+          /* Verify that option is the size of an 'int'.  Should also check
+           * that 'value' is properly aligned for an 'int'
+           */
+
+          if (value_len != sizeof(int))
+            {
+              err = EINVAL;
+              goto errout;
+           }
+
+          /* Get the value.  Is the option being set or cleared? */
+
+          setting = *(int*)value;
+
+          /* Disable interrupts so that there is no conflict with interrupt
+           * level access to options.
+           */
+
+           flags = uip_lock();
+
+          /* Set or clear the option bit */
+
+          if (setting)
+            {
+              _SO_SETOPT(psock->s_options, option);
+            }
+          else
+            {
+              _SO_CLROPT(psock->s_options, option);
+            }
+          uip_unlock(flags);
+        }
+        break;
+
+      /* The following are valid only if the OS CLOCK feature is enabled */
+
+      case SO_RCVTIMEO:
+      case SO_SNDTIMEO:
+#ifndef CONFIG_DISABLE_CLOCK
+        {
+          socktimeo_t timeo;
+
+          /* Verify that option is the size of an 'struct timeval'. */
+
+          if (value_len != sizeof(struct timeval))
+            {
+              err = EINVAL;
+              goto errout;
+           }
+
+          /* Get the timeout value */
+
+          timeo = net_timeval2dsec((struct timeval *)value);
+
+          /* Save the timeout value */
+
+          if (option == SO_RCVTIMEO)
+            {
+              psock->s_rcvtimeo = timeo;
+            }
+          else
+            {
+              psock->s_sndtimeo = timeo;
+            }
+
+          /* Set/clear the corresponding enable/disable bit */
+
+          if (timeo)
+            {
+              _SO_CLROPT(psock->s_options, option);
+            }
+          else
+            {
+              _SO_SETOPT(psock->s_options, option);
+            }
+        }
+        break;
+#endif
+
+      /* The following are not yet implemented */
+
+      case SO_LINGER:
+      case SO_SNDBUF:     /* Sets send buffer size */
+      case SO_RCVBUF:     /* Sets receive buffer size */
+      case SO_RCVLOWAT:   /* Sets the minimum number of bytes to input */
+      case SO_SNDLOWAT:   /* Sets the minimum number of bytes to output */
+
+      /* There options are only valid when used with getopt */
+
+      case SO_ACCEPTCONN: /* Reports whether socket listening is enabled */
+      case SO_ERROR:      /* Reports and clears error status. */
+      case SO_TYPE:       /* Reports the socket type */
+
+      default:
+        err = ENOPROTOOPT;
+        goto errout;
+    }
+  return OK;
+
+errout:
+  set_errno(err);
+  return ERROR;
+}
+
+/****************************************************************************
+ * Function: setsockopt
+ *
+ * Description:
+ *   setsockopt() sets the option specified by the 'option' argument,
+ *   at the protocol level specified by the 'level' argument, to the value
+ *   pointed to by the 'value' argument for the socket associated with the
+ *   file descriptor specified by the 'sockfd' argument.
+ *
+ *   The 'level' argument specifies the protocol level of the option. To set
+ *   options at the socket level, specify the level argument as SOL_SOCKET.
+ *
+ *   See <sys/socket.h> a complete list of values for the 'option' argument.
+ *
+ * Parameters:
+ *   sockfd    Socket descriptor of socket
+ *   level     Protocol level to set the option
+ *   option    identifies the option to set
+ *   value     Points to the argument value
+ *   value_len The length of the argument value
+ *
+ * Returned Value:
+ *  0 on success; -1 on failure
+ *
+ *  EBADF
+ *    The 'sockfd' argument is not a valid socket descriptor.
+ *  EDOM
+ *    The send and receive timeout values are too big to fit into the
+ *    timeout fields in the socket structure.
+ *  EINVAL
+ *    The specified option is invalid at the specified socket 'level' or the
+ *    socket has been shut down.
+ *  EISCONN
+ *    The socket is already connected, and a specified option cannot be set
+ *    while the socket is connected.
+ *  ENOPROTOOPT
+ *    The 'option' is not supported by the protocol.
+ *  ENOTSOCK
+ *    The 'sockfd' argument does not refer to a socket.
+ *  ENOMEM
+ *    There was insufficient memory available for the operation to complete.
+ *  ENOBUFS
+ *    Insufficient resources are available in the system to complete the
+ *    call.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int setsockopt(int sockfd, int level, int option, const void *value, socklen_t value_len)
+{
+  FAR struct socket *psock;
+
+  /* Get the underlying socket structure */
+  /* Verify that the sockfd corresponds to valid, allocated socket */
+
+  psock = sockfd_socket(sockfd);
+  if (!psock || psock->s_crefs <= 0)
+    {
+      set_errno(EBADF);
+      return ERROR;
+    }
+
+  /* Then let psock_setockopt() do all of the work */
+
+  return psock_setsockopt(psock, level, option, value, value_len);
+}
+
+#endif /* CONFIG_NET && CONFIG_NET_SOCKOPTS */