Requests a connection to be made on the given remote_sockaddr
.
Returns 0 if successful, otherwise an exception is raised.
Parameter
-
remote_sockaddr
- thestruct
sockaddr contained in a string or Addrinfo object
Example:
# Pull down Google's web page require 'socket' include Socket::Constants socket = Socket.new( AF_INET, SOCK_STREAM, 0 ) sockaddr = Socket.pack_sockaddr_in( 80, 'www.google.com' ) socket.connect( sockaddr ) socket.write( "GET / HTTP/1.0\r\n\r\n" ) results = socket.read
Unix-based Exceptions
On unix-based systems the following system exceptions may be raised if the call to connect fails:
-
Errno::EACCES - search permission is denied for a component of the prefix path or write access to the
socket
is denied -
Errno::EADDRINUSE - the sockaddr is already in use
-
Errno::EADDRNOTAVAIL - the specified sockaddr is not available from the local machine
-
Errno::EAFNOSUPPORT - the specified sockaddr is not a valid address for the address family of the specified
socket
-
Errno::EALREADY - a connection is already in progress for the specified socket
-
Errno::EBADF - the
socket
is not a valid file descriptor -
Errno::ECONNREFUSED - the target sockaddr was not listening for connections refused the connection request
-
Errno::ECONNRESET - the remote host reset the connection request
-
Errno::EFAULT - the sockaddr cannot be accessed
-
Errno::EHOSTUNREACH - the destination host cannot be reached (probably because the host is down or a remote router cannot reach it)
-
Errno::EINPROGRESS - the O_NONBLOCK is set for the
socket
and the connection cannot be immediately established; the connection will be established asynchronously -
Errno::EINTR - the attempt to establish the connection was interrupted by delivery of a signal that was caught; the connection will be established asynchronously
-
Errno::EISCONN - the specified
socket
is already connected -
Errno::EINVAL - the address length used for the sockaddr is not a valid length for the address family or there is an invalid family in sockaddr
-
Errno::ENAMETOOLONG - the pathname resolved had a length which exceeded PATH_MAX
-
Errno::ENETDOWN - the local interface used to reach the destination is down
-
Errno::ENETUNREACH - no route to the network is present
-
Errno::ENOBUFS - no buffer space is available
-
Errno::ENOSR - there were insufficient STREAMS resources available to complete the operation
-
Errno::ENOTSOCK - the
socket
argument does not refer to a socket -
Errno::EOPNOTSUPP - the calling
socket
is listening and cannot be connected -
Errno::EPROTOTYPE - the sockaddr has a different type than the socket bound to the specified peer address
-
Errno::ETIMEDOUT - the attempt to connect time out before a connection was made.
On unix-based systems if the address family of the calling
socket
is AF_UNIX the follow exceptions may be raised if the
call to connect fails:
-
Errno::EIO - an i/o error occurred while reading from or writing to the file system
-
Errno::ELOOP - too many symbolic links were encountered in translating the pathname in sockaddr
-
Errno::ENAMETOOLLONG - a component of a pathname exceeded NAME_MAX characters, or an entire pathname exceeded PATH_MAX characters
-
Errno::ENOENT - a component of the pathname does not name an existing file or the pathname is an empty string
-
Errno::ENOTDIR - a component of the path prefix of the pathname in sockaddr is not a directory
Windows Exceptions
On Windows systems the following system exceptions may be raised if the call to connect fails:
-
Errno::ENETDOWN - the network is down
-
Errno::EADDRINUSE - the socket's local address is already in use
-
Errno::EINTR - the socket was cancelled
-
Errno::EINPROGRESS - a blocking socket is in progress or the service provider is still processing a callback function. Or a nonblocking connect call is in progress on the
socket
. -
Errno::EALREADY - see Errno::EINVAL
-
Errno::EADDRNOTAVAIL - the remote address is not a valid address, such as ADDR_ANY TODO check ADDRANY TO INADDR_ANY
-
Errno::EAFNOSUPPORT - addresses in the specified family cannot be used with with this
socket
-
Errno::ECONNREFUSED - the target sockaddr was not listening for connections refused the connection request
-
Errno::EFAULT - the socket's internal address or address length parameter is too small or is not a valid part of the user space address
-
Errno::EINVAL - the
socket
is a listening socket -
Errno::EISCONN - the
socket
is already connected -
Errno::ENETUNREACH - the network cannot be reached from this host at this time
-
Errno::EHOSTUNREACH - no route to the network is present
-
Errno::ENOBUFS - no buffer space is available
-
Errno::ENOTSOCK - the
socket
argument does not refer to a socket -
Errno::ETIMEDOUT - the attempt to connect time out before a connection was made.
-
Errno::EWOULDBLOCK - the socket is marked as nonblocking and the connection cannot be completed immediately
-
Errno::EACCES - the attempt to connect the datagram socket to the broadcast address failed
See
-
connect manual pages on unix-based systems
-
connect function in Microsoft's Winsock functions reference
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