219 lines
6.7 KiB
C
219 lines
6.7 KiB
C
/****************************************************************************
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* net/getsockname.c
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*
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* Copyright (C) 2011-2012 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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#include <sys/types.h>
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#include <sys/socket.h>
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#include <errno.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/uip/uip-arch.h>
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#include "net_internal.h"
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#ifdef CONFIG_NET
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Function: getsockname
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*
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* Description:
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* The getsockname() function retrieves the locally-bound name of the
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* specified socket, stores this address in the sockaddr structure pointed
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* to by the 'addr' argument, and stores the length of this address in the
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* object pointed to by the 'addrlen' argument.
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*
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* If the actual length of the address is greater than the length of the
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* supplied sockaddr structure, the stored address will be truncated.
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*
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* If the socket has not been bound to a local name, the value stored in
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* the object pointed to by address is unspecified.
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*
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* Parameters:
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* sockfd Socket descriptor of socket [in]
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* addr sockaddr structure to receive data [out]
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* addrlen Length of sockaddr structure [in/out]
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*
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* Returned Value:
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* On success, 0 is returned, the 'addr' argument points to the address
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* of the socket, and the 'addrlen' argument points to the length of the
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* address. Otherwise, -1 is returned and errno is set to indicate the error.
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* Possible errno values that may be returned include:
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*
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* EBADF - The socket argument is not a valid file descriptor.
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* EOPNOTSUPP - The operation is not supported for this socket's protocol.
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* EINVAL - The socket has been shut down.
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*
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* Assumptions:
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*
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****************************************************************************/
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int getsockname(int sockfd, FAR struct sockaddr *addr, FAR socklen_t *addrlen)
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{
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FAR struct socket *psock = sockfd_socket(sockfd);
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FAR struct uip_driver_s *dev;
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#if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP)
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#ifdef CONFIG_NET_IPv6
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FAR struct sockaddr_in6 *outaddr = (FAR struct sockaddr_in6 *)addr;
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#else
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FAR struct sockaddr_in *outaddr = (FAR struct sockaddr_in *)addr;
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#endif
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#endif
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int err;
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/* Verify that the sockfd corresponds to valid, allocated socket */
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if (!psock || psock->s_crefs <= 0)
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{
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err = EBADF;
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goto errout;
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}
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/* Some sanity checking... Shouldn't need this on a buckled up embedded
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* system (?)
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*/
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#ifdef CONFIG_DEBUG
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if (!addr || !addrlen)
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{
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err = EINVAL;
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goto errout;
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}
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#endif
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/* Check if enough space has been provided for the full address */
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#ifdef CONFIG_NET_IPv6
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if (*addrlen < sizeof(struct sockaddr_in6))
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#else
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if (*addrlen < sizeof(struct sockaddr_in))
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#endif
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{
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/* This function is supposed to return the partial address if
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* a smaller buffer has been provided. This support has not
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* been implemented.
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*/
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err = ENOSYS;
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goto errout;
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}
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/* Set the port number */
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switch (psock->s_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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struct uip_conn *tcp_conn = (struct uip_conn *)psock->s_conn;
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outaddr->sin_port = tcp_conn->lport; /* Already in network byte order */
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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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struct uip_udp_conn *udp_conn = (struct uip_udp_conn *)psock->s_conn;
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outaddr->sin_port = udp_conn->lport; /* Already in network byte order */
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}
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break;
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#endif
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default:
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err = EOPNOTSUPP;
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goto errout;
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}
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/* ISSUE: As of this writing, the socket/connection does not know its IP
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* address. This is because the uIP design is only intended to support
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* a single network device and, therefore, only the network device knows
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* the IP address.
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*
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* Right now, we can just pick the first network device. But that may
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* not work in the future.
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*/
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netdev_semtake();
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dev = g_netdevices;
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if (!dev)
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{
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netdev_semgive();
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err = EINVAL;
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goto errout;
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}
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/* Set the address family and the IP address */
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#if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP)
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#ifdef CONFIG_NET_IPv6
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#error "Not big enough for IPv6 address"
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outaddr->sin_family = AF_INET6;
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memcpy(outaddr->sin6_addr.in6_u.u6_addr8, dev->d_ipaddr, 16);
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*addrlen = sizeof(struct sockaddr_in6);
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#else
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outaddr->sin_family = AF_INET;
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outaddr->sin_addr.s_addr = dev->d_ipaddr;
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*addrlen = sizeof(struct sockaddr_in);
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#endif
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#endif
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netdev_semgive();
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/* Return success */
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return OK;
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errout:
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set_errno(err);
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return ERROR;
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}
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#endif /* CONFIG_NET */
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