258 lines
8.6 KiB
C
258 lines
8.6 KiB
C
/****************************************************************************
|
|
* net/socket/connect.c
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* 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/fs/fs.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_conn == NULL)
|
|
{
|
|
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);
|
|
if (psock->s_sockif->si_connect == NULL)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
ret = psock->s_sockif->si_connect(psock, addr, addrlen);
|
|
if (ret >= 0 && addr->sa_family != AF_UNSPEC)
|
|
{
|
|
FAR struct socket_conn_s *conn = psock->s_conn;
|
|
conn->s_flags |= _SF_CONNECTED;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* 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;
|
|
FAR struct file *filep;
|
|
int ret;
|
|
|
|
/* accept() is a cancellation point */
|
|
|
|
enter_cancellation_point();
|
|
|
|
/* Get the underlying socket structure */
|
|
|
|
ret = sockfd_socket(sockfd, &filep, &psock);
|
|
|
|
/* Then let psock_connect() do all of the work */
|
|
|
|
if (ret == OK)
|
|
{
|
|
ret = psock_connect(psock, addr, addrlen);
|
|
fs_putfilep(filep);
|
|
}
|
|
|
|
if (ret < 0)
|
|
{
|
|
set_errno(-ret);
|
|
ret = ERROR;
|
|
}
|
|
|
|
leave_cancellation_point();
|
|
return ret;
|
|
}
|
|
|
|
#endif /* CONFIG_NET */
|