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/****************************************************************************
* net/getsockname.c
*
* Copyright (C) 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>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <errno.h>
#include <nuttx/net/net.h>
#include <nuttx/net/netdev.h>
#include "net.h"
#ifdef CONFIG_NET
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: getsockname
*
* Description:
* The getsockname() function retrieves the locally-bound name of the
* specified socket, stores this address in the sockaddr structure pointed
* to by the 'addr' argument, and stores the length of this address in the
* object pointed to by the 'addrlen' argument.
*
* If the actual length of the address is greater than the length of the
* supplied sockaddr structure, the stored address will be truncated.
*
* If the socket has not been bound to a local name, the value stored in
* the object pointed to by address is unspecified.
*
* Parameters:
* sockfd Socket descriptor of socket [in]
* addr sockaddr structure to receive data [out]
* addrlen Length of sockaddr structure [in/out]
*
* Returned Value:
* On success, 0 is returned, the 'addr' argument points to the address
* of the socket, and the 'addrlen' argument points to the length of the
* address. Otherwise, -1 is returned and errno is set to indicate the error.
* Possible errno values that may be returned include:
*
* EBADF - The socket argument is not a valid file descriptor.
* EOPNOTSUPP - The operation is not supported for this socket's protocol.
* EINVAL - The socket has been shut down.
*
* Assumptions:
*
****************************************************************************/
int getsockname(int sockfd, FAR struct sockaddr *addr, FAR socklen_t *addrlen)
{
FAR struct socket *psock = sockfd_socket(sockfd);
FAR struct uip_driver_s *dev;
#if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP)
#ifdef CONFIG_NET_IPv6
FAR struct sockaddr_in6 *outaddr = (FAR struct sockaddr_in6 *)addr;
#else
FAR struct sockaddr_in *outaddr = (FAR struct sockaddr_in *)addr;
#endif
#endif
int err;
/* Verify that the sockfd corresponds to valid, allocated socket */
if (!psock || psock->s_crefs <= 0)
{
err = EBADF;
goto errout;
}
/* Some sanity checking... Shouldn't need this on a buckled up embedded
* system (?)
*/
#ifdef CONFIG_DEBUG
if (!addr || !addrlen)
{
err = EINVAL;
goto errout;
}
#endif
/* Check if enough space has been provided for the full address */
#ifdef CONFIG_NET_IPv6
if (*addrlen < sizeof(struct sockaddr_in6))
#else
if (*addrlen < sizeof(struct sockaddr_in))
#endif
{
/* This function is supposed to return the partial address if
* a smaller buffer has been provided. This support has not
* been implemented.
*/
err = ENOSYS;
goto errout;
}
/* Set the port number */
switch (psock->s_type)
{
#ifdef CONFIG_NET_TCP
case SOCK_STREAM:
{
struct uip_conn *tcp_conn = (struct uip_conn *)psock->s_conn;
outaddr->sin_port = tcp_conn->lport; /* Already in network byte order */
}
break;
#endif
#ifdef CONFIG_NET_UDP
case SOCK_DGRAM:
{
struct uip_udp_conn *udp_conn = (struct uip_udp_conn *)psock->s_conn;
outaddr->sin_port = udp_conn->lport; /* Already in network byte order */
}
break;
#endif
default:
err = EOPNOTSUPP;
goto errout;
}
/* ISSUE: As of this writing, the socket/connection does not know its IP
* address. This is because the uIP design is only intended to support
* a single network device and, therefore, only the network device knows
* the IP address.
*
* Right now, we can just pick the first network device. But that may
* not work in the future.
*/
netdev_semtake();
dev = g_netdevices;
if (!dev)
{
netdev_semgive();
err = EINVAL;
goto errout;
}
/* Set the address family and the IP address */
#if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP)
#ifdef CONFIG_NET_IPv6
outaddr->sin_family = AF_INET6;
memcpy(outaddr->sin6_addr.in6_u.u6_addr8, dev->d_ipaddr, 16);
*addrlen = sizeof(struct sockaddr_in6);
#else
outaddr->sin_family = AF_INET;
outaddr->sin_addr.s_addr = dev->d_ipaddr;
*addrlen = sizeof(struct sockaddr_in);
#endif
#endif
netdev_semgive();
/* Return success */
return OK;
errout:
set_errno(err);
return ERROR;
}
#endif /* CONFIG_NET */
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