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Resync new repository with old repo r5166
git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5153 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
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/****************************************************************************
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* net/socket.c
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*
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* Copyright (C) 2007-2009, 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#ifdef CONFIG_NET
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#include <sys/socket.h>
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#include <errno.h>
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#include <assert.h>
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#include <debug.h>
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#include "net_internal.h"
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/****************************************************************************
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* Global Functions
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****************************************************************************/
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/****************************************************************************
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* Function: psock_socket
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*
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* Description:
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* socket() creates an endpoint for communication and returns a socket
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* structure.
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*
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* Parameters:
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* domain (see sys/socket.h)
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* type (see sys/socket.h)
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* protocol (see sys/socket.h)
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* psock A pointer to a user allocated socket structure to be initialized.
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*
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* Returned Value:
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* 0 on success; -1 on error with errno set appropriately
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*
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* EACCES
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* Permission to create a socket of the specified type and/or protocol
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* is denied.
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* EAFNOSUPPORT
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* The implementation does not support the specified address family.
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* EINVAL
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* Unknown protocol, or protocol family not available.
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* EMFILE
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* Process file table overflow.
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* ENFILE
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* The system limit on the total number of open files has been reached.
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* ENOBUFS or ENOMEM
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* Insufficient memory is available. The socket cannot be created until
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* sufficient resources are freed.
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* EPROTONOSUPPORT
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* The protocol type or the specified protocol is not supported within
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* this domain.
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*
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* Assumptions:
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*
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****************************************************************************/
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int psock_socket(int domain, int type, int protocol, FAR struct socket *psock)
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{
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int err = ENFILE;
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/* Only PF_INET or PF_INET6 domains supported */
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#ifdef CONFIG_NET_IPv6
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if ( domain != PF_INET6)
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#else
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if ( domain != PF_INET)
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#endif
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{
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err = EAFNOSUPPORT;
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goto errout;
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}
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/* Only SOCK_STREAM and possible SOCK_DRAM are supported */
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#if defined(CONFIG_NET_TCP) && defined(CONFIG_NET_UDP)
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if ((type == SOCK_STREAM && protocol != 0 && protocol != IPPROTO_TCP) ||
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(type == SOCK_DGRAM && protocol != 0 && protocol != IPPROTO_UDP) ||
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(type != SOCK_STREAM && type != SOCK_DGRAM))
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#elif defined(CONFIG_NET_TCP)
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if ((type == SOCK_STREAM && protocol != 0 && protocol != IPPROTO_TCP) ||
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(type != SOCK_STREAM))
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#elif defined(CONFIG_NET_UDP)
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if ((type == SOCK_DGRAM && protocol != 0 && protocol != IPPROTO_UDP) ||
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(type != SOCK_DGRAM))
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#endif
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{
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err = EPROTONOSUPPORT;
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goto errout;
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}
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/* Everything looks good. Initialize the socket structure */
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/* Save the protocol type */
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psock->s_type = type;
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psock->s_conn = NULL;
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/* Allocate the appropriate connection structure. This reserves the
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* the connection structure is is unallocated at this point. It will
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* not actually be initialized until the socket is connected.
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*/
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err = ENOMEM; /* Assume failure to allocate connection instance */
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switch (type)
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{
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#ifdef CONFIG_NET_TCP
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case SOCK_STREAM:
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{
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/* Allocate the TCP connection structure and save in the new
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* socket instance.
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*/
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struct uip_conn *conn = uip_tcpalloc();
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if (conn)
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{
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/* Set the reference count on the connection structure. This
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* reference count will be increment only if the socket is
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* dup'ed
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*/
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DEBUGASSERT(conn->crefs == 0);
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psock->s_conn = conn;
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conn->crefs = 1;
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}
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}
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break;
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#endif
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#ifdef CONFIG_NET_UDP
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case SOCK_DGRAM:
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{
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/* Allocate the UDP connection structure and save in the new
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* socket instance.
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*/
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struct uip_udp_conn *conn = uip_udpalloc();
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if (conn)
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{
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/* Set the reference count on the connection structure. This
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* reference count will be increment only if the socket is
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* dup'ed
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*/
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DEBUGASSERT(conn->crefs == 0);
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psock->s_conn = conn;
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conn->crefs = 1;
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}
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}
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break;
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#endif
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default:
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break;
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}
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/* Did we succesfully allocate some kind of connection structure? */
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if (!psock->s_conn)
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{
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/* Failed to reserve a connection structure */
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goto errout; /* With err == ENFILE or ENOMEM */
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}
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return OK;
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errout:
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errno = err;
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return ERROR;
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}
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/****************************************************************************
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* Function: socket
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*
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* Description:
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* socket() creates an endpoint for communication and returns a descriptor.
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*
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* Parameters:
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* domain (see sys/socket.h)
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* type (see sys/socket.h)
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* protocol (see sys/socket.h)
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*
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* Returned Value:
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* A non-negative socket descriptor on success; -1 on error with errno set
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* appropriately.
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*
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* EACCES
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* Permission to create a socket of the specified type and/or protocol
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* is denied.
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* EAFNOSUPPORT
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* The implementation does not support the specified address family.
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* EINVAL
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* Unknown protocol, or protocol family not available.
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* EMFILE
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* Process file table overflow.
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* ENFILE
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* The system limit on the total number of open files has been reached.
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* ENOBUFS or ENOMEM
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* Insufficient memory is available. The socket cannot be created until
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* sufficient resources are freed.
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* EPROTONOSUPPORT
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* The protocol type or the specified protocol is not supported within
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* this domain.
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*
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* Assumptions:
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*
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****************************************************************************/
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int socket(int domain, int type, int protocol)
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{
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FAR struct socket *psock;
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int sockfd;
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int ret;
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/* Allocate a socket descriptor */
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sockfd = sockfd_allocate(0);
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if (sockfd < 0)
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{
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set_errno(ENFILE);
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return ERROR;
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}
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/* Get the underlying socket structure */
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psock = sockfd_socket(sockfd);
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if (!psock)
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{
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set_errno(ENOSYS); /* should not happen */
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goto errout;
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}
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/* Initialize the socket structure */
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ret = psock_socket(domain, type, protocol, psock);
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if (ret < 0)
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{
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/* Error already set by psock_socket() */
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goto errout;
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}
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return sockfd;
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errout:
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sockfd_release(sockfd);
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return ERROR;
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}
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#endif /* CONFIG_NET */
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