00093c0a08
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@356 42af7a65-404d-4744-a932-0658087f49c3
269 lines
8.7 KiB
C
269 lines
8.7 KiB
C
/****************************************************************************
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* net/connect.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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#ifdef CONFIG_NET
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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 "net-internal.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Function: connection_event
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*
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* Description:
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* Some connection related event has occurred
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*
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* Parameters:
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* dev The sructure of the network driver that caused the interrupt
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* private An instance of struct recvfrom_s cast to void*
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* Running at the interrupt level
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*
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****************************************************************************/
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static void connection_event(void *private)
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{
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FAR struct socket *psock = (FAR struct socket *)private;
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if (psock)
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{
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/* UIP_CLOSE: The remote host has closed the connection
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* UIP_ABORT: The remote host has aborted the connection
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* UIP_TIMEDOUT: Connection aborted due to too many retransmissions.
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*/
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if ((uip_flags & (UIP_CLOSE|UIP_ABORT|UIP_TIMEDOUT)) != 0)
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{
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/* Indicate that the socet is no longer connected */
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psock->s_flags &= ~_SF_CONNECTED;
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}
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/* UIP_CONNECTED: The socket is successfully connected */
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else if ((uip_flags & UIP_CONNECTED) != 0)
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{
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/* Indicate that the socet is no longer connected */
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psock->s_flags |= _SF_CONNECTED;
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}
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}
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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: connect
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*
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* Description:
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* connect() connects the socket referred to by the file descriptor sockfd
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* to the address specified by 'addr'. The addrlen argument specifies
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* the size of 'addr'. The format of the address in 'addr' is
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* determined by the address space of the socket sockfd.
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*
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* If the socket sockfd is of type SOCK_DGRAM then 'addr' is the address
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* to which datagrams are sent by default, and the only address from which
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* datagrams are received. If the socket is of type SOCK_STREAM or
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* SOCK_SEQPACKET, this call attempts to make a connection to the socket
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* that is bound to the address specified by 'addr'.
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*
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* Generally, connection-based protocol sockets may successfully connect()
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* only once; connectionless protocol sockets may use connect() multiple
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* times to change their association. Connectionless sockets may dissolve
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* the association by connecting to an address with the sa_family member of
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* sockaddr set to AF_UNSPEC.
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*
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* Parameters:
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* sockfd Socket descriptor returned by socket()
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* addr Server address (form depends on type of socket)
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* addrlen Length of actual 'addr'
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*
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* Returned Value:
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* 0 on success; -1 on error with errno set appropriately
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*
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* EACCES, EPERM
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* The user tried to connect to a broadcast address without having the
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* socket broadcast flag enabled or the connection request failed
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* because of a local firewall rule.
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* EADDRINUSE
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* Local address is already in use.
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* EAFNOSUPPORT
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* The passed address didn't have the correct address family in its
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* sa_family field.
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* EAGAIN
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* No more free local ports or insufficient entries in the routing
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* cache.
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* EALREADY
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* The socket is non-blocking and a previous connection attempt has
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* not yet been completed.
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* EBADF
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* The file descriptor is not a valid index in the descriptor table.
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* ECONNREFUSED
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* No one listening on the remote address.
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* EFAULT
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* The socket structure address is outside the user's address space.
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* EINPROGRESS
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* The socket is non-blocking and the connection cannot be completed
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* immediately.
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* EINTR
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* The system call was interrupted by a signal that was caught.
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* EISCONN
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* The socket is already connected.
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* ENETUNREACH
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* Network is unreachable.
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* ENOTSOCK
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* The file descriptor is not associated with a socket.
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* ETIMEDOUT
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* Timeout while attempting connection. The server may be too busy
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* to accept new connections.
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*
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* Assumptions:
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*
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****************************************************************************/
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int connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
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{
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FAR struct socket *psock = sockfd_socket(sockfd);
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#ifdef CONFIG_NET_IPv6
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FAR const struct sockaddr_in6 *inaddr = (const struct sockaddr_in6 *)addr;
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#else
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FAR const struct sockaddr_in *inaddr = (const struct sockaddr_in *)addr;
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#endif
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int err;
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int ret;
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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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/* Verify that a valid address has been provided */
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#ifdef CONFIG_NET_IPv6
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if (addr->sa_family != AF_INET6 || addrlen < sizeof(struct sockaddr_in6))
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#else
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if (addr->sa_family != AF_INET || addrlen < sizeof(struct sockaddr_in))
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#endif
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{
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err = EBADF;
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goto errout;
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}
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/* Perform the connection depending on the protocol type */
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switch (psock->s_type)
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{
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case SOCK_STREAM:
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{
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struct uip_conn *conn;
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/* Verify that the socket is not already connected */
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if (_SS_ISCONNECTED(psock->s_flags))
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{
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err = -EISCONN;
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goto errout;
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}
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/* Get the connection reference from the socket */
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conn = psock->s_conn;
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if (conn) /* Should alwasy be non-NULL */
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{
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/* Perform the uIP connection operation */
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ret = uip_tcpconnect(psock->s_conn, inaddr);
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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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/* Mark the connection bound and connected */
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psock->s_flags |= (_SF_BOUND|_SF_CONNECTED);
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/* Set up to receive callbacks on connection-related events */
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conn->connection_private = (void*)psock;
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conn->connection_event = connection_event;
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}
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}
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break;
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#ifdef CONFIG_NET_UDP
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case SOCK_DGRAM:
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{
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ret = uip_udpconnect(psock->s_conn, inaddr);
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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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}
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break;
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#endif
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default:
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err = EBADF;
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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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*get_errno_ptr() = err;
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return ERROR;
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}
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#endif /* CONFIG_NET */
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