123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257 |
- /****************************************************************************
- * net/socket/connect.c
- *
- * Copyright (C) 2007-2012, 2015-2017 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 <stdint.h>
- #include <errno.h>
- #include <assert.h>
- #include <debug.h>
- #include <nuttx/cancelpt.h>
- #include <nuttx/net/net.h>
- #include "socket/socket.h"
- #ifdef CONFIG_NET
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: psock_connect
- *
- * Description:
- * connect() connects the socket referred to by the structure 'psock'
- * 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 'psock'.
- *
- * If the socket 'psock' 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.
- *
- * Input Parameters:
- * psock Pointer to a socket structure initialized by psock_socket()
- * addr Server address (form depends on type of socket)
- * addrlen Length of actual 'addr'
- *
- * Returned Value:
- * Returns zero (OK) on success. On failure, it returns a negated errno
- * value to indicate the nature of the error.
- *
- * 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 psock_connect(FAR struct socket *psock, FAR const struct sockaddr *addr,
- socklen_t addrlen)
- {
- int ret;
- /* Verify that the psock corresponds to valid, allocated socket */
- if (psock == NULL || psock->s_crefs <= 0)
- {
- return -EBADF;
- }
- /* Make sure that an address was provided */
- if (addr == NULL)
- {
- return -EFAULT;
- }
- /* Let the address family's connect() method handle the operation */
- DEBUGASSERT(psock->s_sockif != NULL && psock->s_sockif->si_connect != NULL);
- ret = psock->s_sockif->si_connect(psock, addr, addrlen);
- if (ret < 0)
- {
- return ret;
- }
- return OK;
- }
- /****************************************************************************
- * Name: 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.
- *
- * Input 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, FAR const struct sockaddr *addr, socklen_t addrlen)
- {
- FAR struct socket *psock;
- int ret;
- /* accept() is a cancellation point */
- (void)enter_cancellation_point();
- /* Get the underlying socket structure */
- psock = sockfd_socket(sockfd);
- /* Then let psock_connect() do all of the work */
- ret = psock_connect(psock, addr, addrlen);
- if (ret < 0)
- {
- set_errno(-ret);
- ret = ERROR;
- }
- leave_cancellation_point();
- return ret;
- }
- #endif /* CONFIG_NET */
|