414 lines
12 KiB
C
414 lines
12 KiB
C
/****************************************************************************
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* net/socket/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 <string.h>
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#include <errno.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/udp.h>
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#include "utils/utils.h"
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#include "netdev/netdev.h"
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#include "tcp/tcp.h"
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#include "udp/udp.h"
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#include "socket/socket.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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* Function: get_ipv4_sockname
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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 PF_NET socket.
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*
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* Parameters:
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* psock Point to the socket structure instance [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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#ifdef CONFIG_NET_IPv4
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int ipv4_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr,
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FAR socklen_t *addrlen)
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{
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FAR struct net_driver_s *dev;
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#if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP)
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FAR struct sockaddr_in *outaddr = (FAR struct sockaddr_in *)addr;
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#endif
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#ifdef CONFIG_NETDEV_MULTINIC
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in_addr_t lipaddr;
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in_addr_t ripaddr;
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#endif
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net_lock_t save;
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/* Check if enough space has been provided for the full address */
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if (*addrlen < sizeof(struct sockaddr_in))
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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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return -ENOSYS;
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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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FAR struct tcp_conn_s *tcp_conn = (FAR struct tcp_conn_s *)psock->s_conn;
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outaddr->sin_port = tcp_conn->lport; /* Already in network byte order */
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#ifdef CONFIG_NETDEV_MULTINIC
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lipaddr = tcp_conn->u.ipv4.laddr;
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ripaddr = tcp_conn->u.ipv4.raddr;
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#endif
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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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FAR struct udp_conn_s *udp_conn = (FAR struct udp_conn_s *)psock->s_conn;
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outaddr->sin_port = udp_conn->lport; /* Already in network byte order */
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#ifdef CONFIG_NETDEV_MULTINIC
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lipaddr = udp_conn->u.ipv4.laddr;
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ripaddr = udp_conn->u.ipv4.raddr;
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#endif
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}
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break;
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#endif
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default:
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return -EOPNOTSUPP;
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}
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/* The socket/connection does not know its IP address unless
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* CONFIG_NETDEV_MULTINIC is selected. Otherwise the design supports only
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* a single network device and only the network device knows the IP address.
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*/
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save = net_lock();
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#ifdef CONFIG_NETDEV_MULTINIC
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/* Find the device matching the IPv4 address in the connection structure */
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dev = netdev_findby_ipv4addr(lipaddr, ripaddr);
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#else
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/* There is only one, the first network device in the list. */
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dev = g_netdevices;
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#endif
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if (!dev)
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{
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net_unlock(save);
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return -EINVAL;
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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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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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net_unlock(save);
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/* Return success */
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return OK;
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}
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#endif
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/****************************************************************************
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* Function: ipv6_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 PF_NET6 socket.
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*
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* Parameters:
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* psock Point to the socket structure instance [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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#ifdef CONFIG_NET_IPv6
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int ipv6_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr,
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FAR socklen_t *addrlen)
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{
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FAR struct net_driver_s *dev;
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#if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP)
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FAR struct sockaddr_in6 *outaddr = (FAR struct sockaddr_in6 *)addr;
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#endif
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#ifdef CONFIG_NETDEV_MULTINIC
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net_ipv6addr_t *lipaddr;
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net_ipv6addr_t *ripaddr;
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#endif
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net_lock_t save;
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/* Check if enough space has been provided for the full address */
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if (*addrlen < sizeof(struct sockaddr_in6))
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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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return -ENOSYS;
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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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FAR struct tcp_conn_s *tcp_conn = (FAR struct tcp_conn_s *)psock->s_conn;
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outaddr->sin6_port = tcp_conn->lport; /* Already in network byte order */
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#ifdef CONFIG_NETDEV_MULTINIC
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lipaddr = &tcp_conn->u.ipv6.laddr;
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ripaddr = &tcp_conn->u.ipv6.raddr;
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#endif
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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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FAR struct udp_conn_s *udp_conn = (FAR struct udp_conn_s *)psock->s_conn;
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outaddr->sin6_port = udp_conn->lport; /* Already in network byte order */
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#ifdef CONFIG_NETDEV_MULTINIC
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lipaddr = &udp_conn->u.ipv6.laddr;
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ripaddr = &udp_conn->u.ipv6.raddr;
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#endif
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}
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break;
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#endif
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default:
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return -EOPNOTSUPP;
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}
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/* The socket/connection does not know its IP address unless
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* CONFIG_NETDEV_MULTINIC is selected. Otherwise the design supports only
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* a single network device and only the network device knows the IP address.
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*/
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save = net_lock();
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#ifdef CONFIG_NETDEV_MULTINIC
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/* Find the device matching the IPv6 address in the connection structure */
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dev = netdev_findby_ipv6addr(*lipaddr, *ripaddr);
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#else
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/* There is only one, the first network device in the list. */
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dev = g_netdevices;
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#endif
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if (!dev)
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{
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net_unlock(save);
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return -EINVAL;
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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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outaddr->sin6_family = AF_INET6;
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memcpy(outaddr->sin6_addr.in6_u.u6_addr8, dev->d_ipv6addr, 16);
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*addrlen = sizeof(struct sockaddr_in6);
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#endif
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net_unlock(save);
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/* Return success */
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return OK;
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}
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#endif
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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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int ret;
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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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/* Handle by address domain */
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switch (psock->s_domain)
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{
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#ifdef CONFIG_NET_IPv4
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case PF_INET:
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ret = ipv4_getsockname(psock, addr, addrlen);
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break;
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#endif
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#ifdef CONFIG_NET_IPv6
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case PF_INET6:
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ret = ipv6_getsockname(psock, addr, addrlen);
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break;
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#endif
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case PF_PACKET:
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default:
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err = EAFNOSUPPORT;
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goto errout;
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}
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/* Check for failure */
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if (ret < 0)
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{
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err = -ret;
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goto errout;
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}
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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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