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incubator-nuttx/net/bind.c

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/****************************************************************************
* net/bind.c
*
* Copyright (C) 2007-2009, 2012, 2014 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>
#ifdef CONFIG_NET
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <string.h>
#ifdef CONFIG_NET_PKT
# include <netpacket/packet.h>
#endif
#include <nuttx/net/tcp.h>
#include <nuttx/net/udp.h>
#include <nuttx/net/pkt.h>
#include "net.h"
#include "netdev/netdev.h"
#include "tcp/tcp.h"
#include "udp/udp.h"
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Function: pkt_bind
*
* Description:
* Bind a raw socket to an network device.
*
* Parameters:
* conn AF_PACKET connection structure
* addr Peer address information
*
* Returned Value:
* 0 on success; -1 on error with errno set appropriately
*
****************************************************************************/
#ifdef CONFIG_NET_PKT
static int pkt_bind(FAR struct pkt_conn_s *conn,
FAR const struct sockaddr_ll *addr)
{
int ifindex;
#if 0
char hwaddr[6] = {0x00, 0xa1, 0xb1, 0xc1, 0xd1, 0xe1}; /* our MAC for debugging */
#endif
char hwaddr[6] = {0x00, 0xe0, 0xde, 0xad, 0xbe, 0xef}; /* MAC from ifconfig */
/* Look at the addr and identify network interface */
ifindex = addr->sll_ifindex;
#if 0
/* Get the MAC address of that interface */
memcpy(hwaddr, g_netdevices->d_mac, 6);
#endif
/* Put ifindex and mac address into connection */
conn->ifindex = ifindex;
memcpy(conn->lmac, hwaddr, 6);
return OK;
}
#endif /* CONFIG_NET_PKT */
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: psock_bind
*
* Description:
* bind() gives the socket 'psock' the local address 'addr'. 'addr' is
* 'addrlen' bytes long. Traditionally, this is called "assigning a name to
* a socket." When a socket is created with socket, it exists in a name
* space (address family) but has no name assigned.
*
* Parameters:
* psock Socket structure of the socket to bind
* addr Socket local address
* addrlen Length of 'addr'
*
* Returned Value:
* 0 on success; -1 on error with errno set appropriately
*
* EACCES
* The address is protected, and the user is not the superuser.
* EADDRINUSE
* The given address is already in use.
* EINVAL
* The socket is already bound to an address.
* ENOTSOCK
* psock is a descriptor for a file, not a socket.
*
* Assumptions:
*
****************************************************************************/
int psock_bind(FAR struct socket *psock, const struct sockaddr *addr,
socklen_t addrlen)
{
#ifdef CONFIG_NET_PKT
FAR const struct sockaddr_ll *lladdr = (const struct sockaddr_ll *)addr;
#endif
#if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP)
#ifdef CONFIG_NET_IPv6
FAR const struct sockaddr_in6 *inaddr = (const struct sockaddr_in6 *)addr;
#else
FAR const struct sockaddr_in *inaddr = (const struct sockaddr_in *)addr;
#endif
#endif
int err;
int ret = OK;
/* Verify that the psock corresponds to valid, allocated socket */
if (!psock || psock->s_crefs <= 0)
{
err = ENOTSOCK;
goto errout;
}
/* Verify that a valid address has been provided */
if (
(
#if defined(CONFIG_NET_PKT)
addr->sa_family != AF_PACKET &&
#endif
#if defined(CONFIG_NET_IPv6)
addr->sa_family != AF_INET6
#else
addr->sa_family != AF_INET
#endif
) ||
#if defined(CONFIG_NET_PKT)
(addr->sa_family == AF_PACKET && addrlen < sizeof(struct sockaddr_ll)) ||
#endif
#if defined(CONFIG_NET_IPv6)
(addr->sa_family == AF_INET6 && addrlen < sizeof(struct sockaddr_in6))
#else
(addr->sa_family == AF_INET && addrlen < sizeof(struct sockaddr_in))
#endif
)
{
err = EBADF;
goto errout;
}
/* Perform the binding depending on the protocol type */
switch (psock->s_type)
{
#ifdef CONFIG_NET_PKT
case SOCK_RAW:
ret = pkt_bind(psock->s_conn, lladdr);
break;
#endif
#ifdef CONFIG_NET_TCP
case SOCK_STREAM:
ret = tcp_bind(psock->s_conn, inaddr);
psock->s_flags |= _SF_BOUND;
break;
#endif
#ifdef CONFIG_NET_UDP
case SOCK_DGRAM:
ret = udp_bind(psock->s_conn, inaddr);
break;
#endif
default:
err = EBADF;
goto errout;
}
/* Was the bind successful */
if (ret < 0)
{
err = -ret;
goto errout;
}
return OK;
errout:
*get_errno_ptr() = err;
return ERROR;
}
/****************************************************************************
* Function: bind
*
* Description:
* bind() gives the socket 'sockfd' the local address 'addr'. 'addr' is
* 'addrlen' bytes long. Traditionally, this is called "assigning a name to
* a socket." When a socket is created with socket, it exists in a name
* space (address family) but has no name assigned.
*
* Parameters:
* sockfd Socket descriptor of the socket to bind
* addr Socket local address
* addrlen Length of 'addr'
*
* Returned Value:
* 0 on success; -1 on error with errno set appropriately
*
* EACCES
* The address is protected, and the user is not the superuser.
* EADDRINUSE
* The given address is already in use.
* EBADF
* sockfd is not a valid descriptor.
* EINVAL
* The socket is already bound to an address.
* ENOTSOCK
* sockfd is a descriptor for a file, not a socket.
*
* Assumptions:
*
****************************************************************************/
int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
{
/* Make the socket descriptor to the underlying socket structure */
FAR struct socket *psock = sockfd_socket(sockfd);
/* Then let psock_bind do all of the work */
return psock_bind(psock, addr, addrlen);
}
#endif /* CONFIG_NET */
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