Added framework for getsockopt() setsockopt()

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@332 42af7a65-404d-4744-a932-0658087f49c3

ChangeLog

@@ -207,3 +207,4 @@
 	* Added snprintf()
 	* Added send() and sendto(); integrate write() and close() with socket descriptors.
         * Added recv() and recvfrom().
+	* Added getsockopt() and setsockopt()

Documentation/NuttX.html

@@ -632,15 +632,15 @@ Other memory:
 </table>
 
 <pre><ul>
-
 0.2.9 2007-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
 
 	* Imported uIP into the tree (see
 	   http://www.sics.se/~adam/uip/index.php/Main_Page)
 	* Adding socket(), bind(), connect()
 	* Added snprintf()
-        * Added send() and sendto(); integrate write() and close() with socket descriptors.
+	* Added send() and sendto(); integrate write() and close() with socket descriptors.
         * Added recv() and recvfrom().
+	* Added getsockopt() and setsockopt()
 </pre></ul>
 
 <table width ="100%">

include/nuttx/net.h

@@ -67,15 +67,22 @@
  * Public Types
  ****************************************************************************/
 
+/* This defines a bitmap big enough for one bit for each socket option */
+
+typedef uint16 sockopt_t;
+
 /* This is the internal representation of a socket reference by a file
  * descriptor.
  */
 
 struct socket
 {
-  int   s_crefs;          /* Reference count on the socket */
-  uint8 s_type;           /* Protocol type: Only SOCK_STREAM or SOCK_DGRAM */
-  void *s_conn;           /* Connection: struct uip_conn * or uip_udp_conn * */
+  int       s_crefs;      /* Reference count on the socket */
+  uint8     s_type;       /* Protocol type: Only SOCK_STREAM or SOCK_DGRAM */
+#ifdef CONFIG_NET_SOCKOPTS
+  sockopt_t s_options;    /* Selected socket options */
+#endif
+  void     *s_conn;       /* Connection: struct uip_conn * or uip_udp_conn * */
 };
 
 /* This defines a list of sockets indexed by the socket descriptor */
@@ -89,6 +96,10 @@ struct socketlist
 };
 #endif
 
+/* This defines a bitmap big enough for one bit for each socket option */
+
+typedef uint16 sockopt_t;
+
 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/

include/sys/socket.h

 /****************************************************************************
- * socket.h
+ * sys/socket.h
  *
  *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
@@ -117,38 +117,42 @@
 
 /* Socket options */
 
-#define SO_DEBUG        1 /* Enables recording of debugging information (get/set).
+#define SO_DEBUG        0 /* Enables recording of debugging information (get/set).
                            * arg: integer contain boolean value */
-#define SO_ACCEPTCONN   2 /* Reports whether socket listening is enabled (get only).
+#define SO_ACCEPTCONN   1 /* Reports whether socket listening is enabled (get only).
                            * arg: returns integer contain boolean value */
-#define SO_BROADCAST    3 /* Permits sending of broadcast messages (get/set).
+#define SO_BROADCAST    2 /* Permits sending of broadcast messages (get/set).
                            * arg: integer contain boolean value */
-#define SO_REUSEADDR    4 /* Allow reuse of local addresses (get/set)
+#define SO_REUSEADDR    3 /* Allow reuse of local addresses (get/set)
                            * arg: integer contain boolean value */
-#define SO_KEEPALIVE    5 /* Keeps connections active by enabling the periodic transmission
+#define SO_KEEPALIVE    4 /* Keeps connections active by enabling the periodic transmission
                            * of messages (get/set). arg: int */
-#define SO_LINGER       6 /* Lingers on a close() if data is present (get/set)
+#define SO_LINGER       5 /* Lingers on a close() if data is present (get/set)
                            * arg: struct linger */
-#define SO_OOBINLINE    7 /* Leaves received out-of-band data (data marked urgent) inline
+#define SO_OOBINLINE    6 /* Leaves received out-of-band data (data marked urgent) inline
                            * (get/set) arg: integer contain boolean value */
-#define SO_SNDBUF       8 /* Sets send buffer size. arg: integer value (get/set). */
-#define SO_RCVBUF       9 /* Sets receive buffer size. arg: integer value (get/set). */
-#define SO_ERROR       10 /* Reports and clears error statust (get only).  arg: returns
+#define SO_SNDBUF       7 /* Sets send buffer size. arg: integer value (get/set). */
+#define SO_RCVBUF       8 /* Sets receive buffer size. arg: integer value (get/set). */
+#define SO_ERROR        9 /* Reports and clears error statust (get only).  arg: returns
                            * an integer value
-#define SO_TYPE        11 /* Reports the socket type (get only). return: int */
-#define SO_DONTROUTE   12 /* equests that outgoing messages bypass standard routing
+#define SO_TYPE        10 /* Reports the socket type (get only). return: int */
+#define SO_DONTROUTE   11 /* equests that outgoing messages bypass standard routing (get/set)
                            * arg: integer contain boolean value */
-#define SO_RCVLOWAT    13 /* Sets the minimum number of bytes to process for socket input
+#define SO_RCVLOWAT    12 /* Sets the minimum number of bytes to process for socket input
                            * (get/set). arg: integer value */
-#define SO_RCVTIMEO    14 /* Sets the timeout value that specifies the maximum amount of time
+#define SO_RCVTIMEO    13 /* Sets the timeout value that specifies the maximum amount of time
                            * an input function waits until it completes (get/set).
                            * arg: struct timeval */
-#define SO_SNDLOWAT    15 /* Sets the minimum number of bytes to process for socket output
+#define SO_SNDLOWAT    14 /* Sets the minimum number of bytes to process for socket output
                            * (get/set). arg: integer value */
-#define SO_SNDTIMEO    16 /* Sets the timeout value specifying the amount of time that an
+#define SO_SNDTIMEO    15 /* Sets the timeout value specifying the amount of time that an
                            * output function blocks because flow control prevents data from
                            * being sent(get/set). arg: struct timeval */
 
+/* Protocol levels supported by get/setsockopt(): */
+
+#define SOL_SOCKET     0  /* Only socket-level options supported */
+
 /****************************************************************************
  * Type Definitions
  ****************************************************************************/
@@ -185,8 +189,8 @@ EXTERN ssize_t recvfrom(int sockfd, void *buf, size_t len, int flags,
 
 EXTERN int setsockopt(int sockfd, int level, int option,
                       const void *value, socklen_t value_len);
-EXTERN int setsockopt(int sockfd, int level, int option,
-                      const void *value, socklen_t value_len);
+EXTERN int getsockopt(int sockfd, int level, int option,
+                      void *value, socklen_t *value_len);
 
 #undef EXTERN
 #if defined(__cplusplus)

net/Makefile

@@ -41,7 +41,7 @@ MKDEP		= $(TOPDIR)/tools/mkdeps.sh
 ifeq ($(CONFIG_NET),y)
 STD_ASRCS	=
 STD_CSRCS	= socket.c bind.c connect.c send.c sendto.c recv.c recvfrom.c \
-		  net_sockets.c net-close.c
+		  setsockopt.c getsockopt.c net_sockets.c net-close.c
 include uip/Make.defs
 endif
 

net/getsockopt.c

+/****************************************************************************
+ * net/getsockopt.c
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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>
+#ifdef CONFIG_NET
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <errno.h>
+
+#include "net_internal.h"
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: getsockopt
+ *
+ * Description:
+ *   getsockopt() retrieve thse value for the option specified by the
+ *   'option' argument for the socket specified by the 'sockfd' argument. If
+ *   the size of the option value is greater than 'value_len', the value
+ *   stored in the object pointed to by the 'value' argument will be silently
+ *   truncated. Otherwise, the length pointed to by the 'value_len' argument
+ *   will be modified to indicate the actual length of the'value'.
+ *
+ *   The 'level' argument specifies the protocol level of the option. To
+ *   retrieve 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 get
+ *   value     Points to the argument value
+ *   value_len The length of the argument value
+ *
+ * Returned Value:
+ *
+ *  EBADF
+ *    The 'sockfd' argument is not a valid socket descriptor.
+ *  EINVAL
+ *    The specified option is invalid at the specified socket 'level' or the
+ *    socket has been shutdown.
+ *  ENOPROTOOPT
+ *    The 'option' is not supported by the protocol.
+ *  ENOTSOCK
+ *    The 'sockfd' argument does not refer to a socket.
+ *  ENOBUFS
+ *    Insufficient resources are available in the system to complete the
+ *    call.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int getsockopt(int sockfd, int level, int option, void *value, socklen_t *value_len)
+{
+  *get_errno_ptr() = ENOPROTOOPT;
+  return ERROR;
+}
+
+#endif /* CONFIG_NET */

net/net_internal.h

@@ -51,6 +51,47 @@
  * Definitions
  ****************************************************************************/
 
+/* These define bit positions for each socket option (see sys/socket.h) */
+
+#define _SO_DEBUG        (1 << SO_DEBUG)
+#define _SO_ACCEPTCONN   (1 << SO_ACCEPTCONN)
+#define _SO_BROADCAST    (1 << SO_BROADCAST)
+#define _SO_REUSEADDR    (1 << SO_REUSEADDR)
+#define _SO_KEEPALIVE    (1 << SO_KEEPALIVE)
+#define _SO_LINGER       (1 << SO_LINGER)
+#define _SO_OOBINLINE    (1 << SO_OOBINLINE)
+#define _SO_SNDBUF       (1 << SO_SNDBUF)
+#define _SO_RCVBUF       (1 << SO_RCVBUF)
+#define _SO_ERROR        (1 << SO_ERROR)
+#define _SO_TYPE         (1 << SO_TYPE)
+#define _SO_DONTROUTE    (1 << SO_DONTROUTE)
+#define _SO_RCVLOWAT     (1 << SO_RCVLOWAT)
+#define _SO_RCVTIMEO     (1 << SO_RCVTIMEO)
+#define _SO_SNDLOWAT     (1 << SO_SNDLOWAT)
+#define _SO_SNDTIMEO     (1 << SO_SNDTIMEO)
+
+/* This idenfies the options that have been implemented.  Someday this
+ * should be 0xffff
+ */
+
+#define _SO_IMPLEMENTED  0x0000
+
+/* The set of all valid options is a subset of those that are implemented
+ * and those that can be supported within the kernel OS configuration.
+ */
+
+#ifdef CONFIG_DISABLE_CLOCK
+# define _SO_ALLOPTIONS  (_SO_IMPLEMENTED & ~(_SO_RCVTIMEO|_SO_SNDTIMEO)
+#else
+# define _SO_ALLOPTIONS  (_SO_IMPLEMENTED)
+#endif
+
+/* This is the set of options valid for getsockopt and setsockopt */
+
+#define _SO_GETONLY      (_SO_ACCEPTCONN|_SO_ERROR|_SO_TYPE)
+#define _SO_SETOPTS      (_SO_ALLOPTIONS & ~_SO_GETONLY)
+#define _SO_GETOTPS      _SO_ALLOPTIONS
+
 /****************************************************************************
  * Public Types
  ****************************************************************************/

net/setsockopt.c

+/****************************************************************************
+ * net/setsockopt.c
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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>
+#ifdef CONFIG_NET
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <errno.h>
+
+#include "net_internal.h"
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * 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)
+{
+  *get_errno_ptr() = ENOPROTOOPT;
+  return ERROR;
+}
+
+#endif /* CONFIG_NET */