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nuttx/net/socket/inet_getsockname.c

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/****************************************************************************
* net/socket/getsockname.c
*
* Copyright (C) 2011-2012, 2017 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 <assert.h>
#include <nuttx/net/net.h>
#include <nuttx/net/netdev.h>
#include <nuttx/net/udp.h>
#include "utils/utils.h"
#include "netdev/netdev.h"
#include "tcp/tcp.h"
#include "udp/udp.h"
#include "socket/socket.h"
#include "usrsock/usrsock.h"
#ifdef CONFIG_NET
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: get_ipv4_sockname
*
* Description:
* The getsockname() function retrieves the locally-bound name of the
* specified PF_NET socket.
*
* Parameters:
* psock Point to the socket structure instance [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:
*
****************************************************************************/
#ifdef CONFIG_NET_IPv4
int ipv4_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen)
{
FAR struct net_driver_s *dev;
#if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK)
FAR struct sockaddr_in *outaddr = (FAR struct sockaddr_in *)addr;
#endif
#ifdef CONFIG_NETDEV_MULTINIC
in_addr_t lipaddr;
in_addr_t ripaddr;
#endif
/* Check if enough space has been provided for the full address */
if (*addrlen < sizeof(struct sockaddr_in))
{
/* This function is supposed to return the partial address if
* a smaller buffer has been provided. This support has not
* been implemented.
*/
return -ENOSYS;
}
/* Set the port number */
switch (psock->s_type)
{
#ifdef NET_TCP_HAVE_STACK
case SOCK_STREAM:
{
FAR struct tcp_conn_s *tcp_conn = (FAR struct tcp_conn_s *)psock->s_conn;
outaddr->sin_port = tcp_conn->lport; /* Already in network byte order */
#ifdef CONFIG_NETDEV_MULTINIC
lipaddr = tcp_conn->u.ipv4.laddr;
ripaddr = tcp_conn->u.ipv4.raddr;
#endif
}
break;
#endif
#ifdef NET_UDP_HAVE_STACK
case SOCK_DGRAM:
{
FAR struct udp_conn_s *udp_conn = (FAR struct udp_conn_s *)psock->s_conn;
outaddr->sin_port = udp_conn->lport; /* Already in network byte order */
#ifdef CONFIG_NETDEV_MULTINIC
lipaddr = udp_conn->u.ipv4.laddr;
ripaddr = udp_conn->u.ipv4.raddr;
#endif
}
break;
#endif
default:
return -EOPNOTSUPP;
}
#ifdef CONFIG_NETDEV_MULTINIC
/* The socket/connection does not know its IP address unless
* CONFIG_NETDEV_MULTINIC is selected. Otherwise the design supports only
* a single network device and only the network device knows the IP address.
*/
if (lipaddr == 0)
{
#if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP)
outaddr->sin_family = AF_INET;
outaddr->sin_addr.s_addr = 0;
*addrlen = sizeof(struct sockaddr_in);
#endif
return OK;
}
#endif
net_lock();
#ifdef CONFIG_NETDEV_MULTINIC
/* Find the device matching the IPv4 address in the connection structure.
* NOTE: listening sockets have no ripaddr. Work around is to use the
* lipaddr when ripaddr is not available.
*/
if (ripaddr == 0)
{
ripaddr = lipaddr;
}
dev = netdev_findby_ipv4addr(lipaddr, ripaddr);
#else
/* There is only one, the first network device in the list. */
dev = g_netdevices;
#endif
if (!dev)
{
net_unlock();
return -EINVAL;
}
/* Set the address family and the IP address */
#if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK)
outaddr->sin_family = AF_INET;
outaddr->sin_addr.s_addr = dev->d_ipaddr;
*addrlen = sizeof(struct sockaddr_in);
#endif
net_unlock();
/* Return success */
return OK;
}
#endif
/****************************************************************************
* Name: ipv6_getsockname
*
* Description:
* The getsockname() function retrieves the locally-bound name of the
* specified PF_NET6 socket.
*
* Parameters:
* psock Point to the socket structure instance [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:
*
****************************************************************************/
#ifdef CONFIG_NET_IPv6
int ipv6_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen)
{
FAR struct net_driver_s *dev;
#if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK)
FAR struct sockaddr_in6 *outaddr = (FAR struct sockaddr_in6 *)addr;
#endif
#ifdef CONFIG_NETDEV_MULTINIC
net_ipv6addr_t *lipaddr;
net_ipv6addr_t *ripaddr;
#endif
/* Check if enough space has been provided for the full address */
if (*addrlen < sizeof(struct sockaddr_in6))
{
/* This function is supposed to return the partial address if
* a smaller buffer has been provided. This support has not
* been implemented.
*/
return -ENOSYS;
}
/* Set the port number */
switch (psock->s_type)
{
#ifdef NET_TCP_HAVE_STACK
case SOCK_STREAM:
{
FAR struct tcp_conn_s *tcp_conn = (FAR struct tcp_conn_s *)psock->s_conn;
outaddr->sin6_port = tcp_conn->lport; /* Already in network byte order */
#ifdef CONFIG_NETDEV_MULTINIC
lipaddr = &tcp_conn->u.ipv6.laddr;
ripaddr = &tcp_conn->u.ipv6.raddr;
#endif
}
break;
#endif
#ifdef NET_UDP_HAVE_STACK
case SOCK_DGRAM:
{
FAR struct udp_conn_s *udp_conn = (FAR struct udp_conn_s *)psock->s_conn;
outaddr->sin6_port = udp_conn->lport; /* Already in network byte order */
#ifdef CONFIG_NETDEV_MULTINIC
lipaddr = &udp_conn->u.ipv6.laddr;
ripaddr = &udp_conn->u.ipv6.raddr;
#endif
}
break;
#endif
default:
return -EOPNOTSUPP;
}
#ifdef CONFIG_NETDEV_MULTINIC
/* The socket/connection does not know its IP address unless
* CONFIG_NETDEV_MULTINIC is selected. Otherwise the design supports only
* a single network device and only the network device knows the IP address.
*/
if (net_ipv6addr_cmp(lipaddr, g_ipv6_allzeroaddr))
{
#if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK)
outaddr->sin6_family = AF_INET6;
memcpy(outaddr->sin6_addr.in6_u.u6_addr8, g_ipv6_allzeroaddr, 16);
*addrlen = sizeof(struct sockaddr_in6);
#endif
return OK;
}
#endif
net_lock();
#ifdef CONFIG_NETDEV_MULTINIC
/* Find the device matching the IPv6 address in the connection structure.
* NOTE: listening sockets have no ripaddr. Work around is to use the
* lipaddr when ripaddr is not available.
*/
if (net_ipv6addr_cmp(ripaddr, g_ipv6_allzeroaddr))
{
ripaddr = lipaddr;
}
dev = netdev_findby_ipv6addr(*lipaddr, *ripaddr);
#else
/* There is only one, the first network device in the list. */
dev = g_netdevices;
#endif
if (!dev)
{
net_unlock();
return -EINVAL;
}
/* Set the address family and the IP address */
#if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK)
outaddr->sin6_family = AF_INET6;
memcpy(outaddr->sin6_addr.in6_u.u6_addr8, dev->d_ipv6addr, 16);
*addrlen = sizeof(struct sockaddr_in6);
#endif
net_unlock();
/* Return success */
return OK;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: inet_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 inet_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen)
{
int ret;
#ifdef CONFIG_NET_USRSOCK
if (psock->s_type == SOCK_USRSOCK_TYPE)
{
FAR struct usrsock_conn_s *conn = psock->s_conn;
DEBUGASSERT(conn);
/* Handle usrsock getsockname */
ret = usrsock_getsockname(conn, addr, addrlen);
if (ret < 0)
{
errcode = -ret;
goto errout;
}
return OK;
}
#endif
/* Handle by address domain */
switch (psock->s_domain)
{
#ifdef CONFIG_NET_IPv4
case PF_INET:
ret = ipv4_getsockname(psock, addr, addrlen);
break;
#endif
#ifdef CONFIG_NET_IPv6
case PF_INET6:
ret = ipv6_getsockname(psock, addr, addrlen);
break;
#endif
case PF_PACKET:
default:
errcode = EAFNOSUPPORT;
goto errout;
}
errout:
set_errno(errcode);
return ERROR;
}
#endif /* CONFIG_NET */
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