/****************************************************************************
* net/connect.c
*
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 "net-internal.h"
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Function: connection_event
*
* Description:
* Some connection related event has occurred
*
* Parameters:
* dev The sructure of the network driver that caused the interrupt
* private An instance of struct recvfrom_s cast to void*
*
* Returned Value:
* None
*
* Assumptions:
* Running at the interrupt level
*
****************************************************************************/
static void connection_event(void *private)
{
FAR struct socket *psock = (FAR struct socket *)private;
if (psock)
{
/* UIP_CLOSE: The remote host has closed the connection
* UIP_ABORT: The remote host has aborted the connection
* UIP_TIMEDOUT: Connection aborted due to too many retransmissions.
*/
if ((uip_flags & (UIP_CLOSE|UIP_ABORT|UIP_TIMEDOUT)) != 0)
{
/* Indicate that the socet is no longer connected */
psock->s_flags &= ~_SF_CONNECTED;
}
/* UIP_CONNECTED: The socket is successfully connected */
else if ((uip_flags & UIP_CONNECTED) != 0)
{
/* Indicate that the socet is no longer connected */
psock->s_flags |= _SF_CONNECTED;
}
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: connect
*
* Description:
* connect() connects the socket referred to by the file descriptor sockfd
* to the address specified by 'addr'. The addrlen argument specifies
* the size of 'addr'. The format of the address in 'addr' is
* determined by the address space of the socket sockfd.
*
* If the socket sockfd is of type SOCK_DGRAM then 'addr' is the address
* to which datagrams are sent by default, and the only address from which
* datagrams are received. If the socket is of type SOCK_STREAM or
* SOCK_SEQPACKET, this call attempts to make a connection to the socket
* that is bound to the address specified by 'addr'.
*
* Generally, connection-based protocol sockets may successfully connect()
* only once; connectionless protocol sockets may use connect() multiple
* times to change their association. Connectionless sockets may dissolve
* the association by connecting to an address with the sa_family member of
* sockaddr set to AF_UNSPEC.
*
* Parameters:
* sockfd Socket descriptor returned by socket()
* addr Server address (form depends on type of socket)
* addrlen Length of actual 'addr'
*
* Returned Value:
* 0 on success; -1 on error with errno set appropriately
*
* EACCES, EPERM
* The user tried to connect to a broadcast address without having the
* socket broadcast flag enabled or the connection request failed
* because of a local firewall rule.
* EADDRINUSE
* Local address is already in use.
* EAFNOSUPPORT
* The passed address didn't have the correct address family in its
* sa_family field.
* EAGAIN
* No more free local ports or insufficient entries in the routing
* cache.
* EALREADY
* The socket is non-blocking and a previous connection attempt has
* not yet been completed.
* EBADF
* The file descriptor is not a valid index in the descriptor table.
* ECONNREFUSED
* No one listening on the remote address.
* EFAULT
* The socket structure address is outside the user's address space.
* EINPROGRESS
* The socket is non-blocking and the connection cannot be completed
* immediately.
* EINTR
* The system call was interrupted by a signal that was caught.
* EISCONN
* The socket is already connected.
* ENETUNREACH
* Network is unreachable.
* ENOTSOCK
* The file descriptor is not associated with a socket.
* ETIMEDOUT
* Timeout while attempting connection. The server may be too busy
* to accept new connections.
*
* Assumptions:
*
****************************************************************************/
int connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
{
FAR struct socket *psock = sockfd_socket(sockfd);
#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
int err;
int ret;
/* Verify that the sockfd corresponds to valid, allocated socket */
if (!psock || psock->s_crefs <= 0)
{
err = EBADF;
goto errout;
}
/* Verify that a valid address has been provided */
#ifdef CONFIG_NET_IPv6
if (addr->sa_family != AF_INET6 || addrlen < sizeof(struct sockaddr_in6))
#else
if (addr->sa_family != AF_INET || addrlen < sizeof(struct sockaddr_in))
#endif
{
err = EBADF;
goto errout;
}
/* Perform the connection depending on the protocol type */
switch (psock->s_type)
{
case SOCK_STREAM:
{
struct uip_conn *conn;
/* Verify that the socket is not already connected */
if (_SS_ISCONNECTED(psock->s_flags))
{
err = -EISCONN;
goto errout;
}
/* Get the connection reference from the socket */
conn = psock->s_conn;
if (conn) /* Should alwasy be non-NULL */
{
/* Perform the uIP connection operation */
ret = uip_tcpconnect(psock->s_conn, inaddr);
if (ret < 0)
{
err = -ret;
goto errout;
}
/* Mark the connection bound and connected */
psock->s_flags |= (_SF_BOUND|_SF_CONNECTED);
/* Set up to receive callbacks on connection-related events */
conn->connection_private = (void*)psock;
conn->connection_event = connection_event;
}
}
break;
#ifdef CONFIG_NET_UDP
case SOCK_DGRAM:
{
ret = uip_udpconnect(psock->s_conn, inaddr);
if (ret < 0)
{
err = -ret;
goto errout;
}
}
break;
#endif
default:
err = EBADF;
goto errout;
}
err = ENOSYS;
/*return OK;*/
errout:
*get_errno_ptr() = err;
return ERROR;
}
#endif /* CONFIG_NET */
