Socket bind failed on local address undef permission denied


Sockets are endpoints of a bidirectional communication channel. Sockets can communicate within a process, between processes on the same machine or between different machines.

There are many types of socket: This may be used to identify a variant of a protocol. Ruby's Socket implementation raises exceptions based on the error generated by the system dependent implementation.

This is why the methods are documented in a way that isolate Unix-based system exceptions from Windows based exceptions. If more information on a particular exception is needed, please refer to the Unix manual pages or the Windows WinSock reference. Although the general way to create socket is:: Much material in this documentation is taken with permission from Programming Ruby from The Pragmatic Bookshelf.

The arguments are a list of sockets. The individual argument should be a socket or an array of sockets. This method yields the block sequentially. It means that the next connection is not accepted until the block returns. So concurrent mechanism, thread for example, should be used to service multiple clients at a time. If Addrinfo object is preferred, use Addrinfo. Note that it is not guaranteed to be able to convert to IP address using gethostbyname, getaddrinfo, etc.

If you need local IP address, use:: Returns an array of interface addresses. An element of the array is an instance of Socket:: If Addrinfo object is preferred, use Addrinfo getnameinfo. If protocol is not given, 0 is used internally. The optional last argument opts is options represented by a hash.

If a block is given, the block is called with the socket. The value of the block is returned. The socket is closed when this method returns. The socket is not closed when the block returns. So application should close it explicitly. This method calls the block sequentially.

If a block is given, the block is called with the sockets. If port is 0, actual port number is chosen dynamically. However all sockets in the result has same port number. The block is called with the message and its source information.

This method allocates sockets internally using port. If host is specified, it is used conjunction with port to determine the server addresses. It is used for reply. The return value of:: For each packet received, the block is called.

UDPSource object which is used for reply. The sockets are closed when this method returns. So application should close it.

This method deletes the socket file pointed by path at first if the file is a socket file and it is owned by the user of the application. This is safe only if the directory of path is not changed by a malicious user. If a block is given, it is called with the socket and the block value is returned. When the block exits, the socket is closed and the socket file is removed.

Accepts a next connection. Returns a new Socket object and Addrinfo object. If the exception is Errno:: WaitReadable exception, but return the symbol: On unix-based based systems the following system exceptions may be raised if the call to bind fails:.

EACCES - the specified sockaddr is protected and the current user does not have permission to bind to it. EINVAL - the socket is already bound to an address, and the protocol does not support binding to the new sockaddr or the socket has been shut down. On unix-based based systems if the address family of the calling socket is Socket:: EACCES - search permission is denied for a component of the prefix path or write access to the socket is denied.

ELOOP - too many symbolic links were encountered in translating the pathname in sockaddr. ENOENT - a component of the pathname does not name an existing file or the pathname is an empty string. On Windows systems the following system exceptions may be raised if the call to bind fails:. EFAULT - the socket's internal address or address length parameter is too small or is not a valid part of the user space addressed. Returns 0 if successful, otherwise an exception is raised.

On unix-based systems the following system exceptions may be raised if the call to connect fails:. EINTR - the attempt to establish the connection was interrupted by delivery of a signal that was caught; the connection will be established asynchronously.

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. On Windows systems the following system exceptions may be raised if the call to connect fails:. Or a nonblocking connect call is in progress on the socket.

The optional last argument opts is options represented by a hash. If a block is given, the block is called with the socket. The value of the block is returned. The socket is closed when this method returns.

The socket is not closed when the block returns. So application should close it explicitly. This method calls the block sequentially. If a block is given, the block is called with the sockets. If port is 0, actual port number is chosen dynamically. However all sockets in the result has same port number. The block is called with the message and its source information. This method allocates sockets internally using port.

If host is specified, it is used conjunction with port to determine the server addresses. For each packet received, the block is called. UDPSource object which is used for reply. The sockets are closed when this method returns. This method deletes the socket file pointed by path at first if the file is a socket file and it is owned by the user of the application.

This is safe only if the directory of path is not changed by a malicious user. If a block is given, it is called with the socket and the block value is returned. When the block exits, the socket is closed and the socket file is removed. If the exception is Errno:: WaitReadable exception, but return the symbol: On unix-based based systems the following system exceptions may be raised if the call to bind fails:.

EACCES - the specified sockaddr is protected and the current user does not have permission to bind to it. EINVAL - the socket is already bound to an address, and the protocol does not support binding to the new sockaddr or the socket has been shut down. On unix-based based systems if the address family of the calling socket is Socket:: EACCES - search permission is denied for a component of the prefix path or write access to the socket is denied.

ELOOP - too many symbolic links were encountered in translating the pathname in sockaddr. ENOENT - a component of the pathname does not name an existing file or the pathname is an empty string. On Windows systems the following system exceptions may be raised if the call to bind fails:. EFAULT - the socket's internal address or address length parameter is too small or is not a valid part of the user space addressed. Returns 0 if successful, otherwise an exception is raised.

On unix-based systems the following system exceptions may be raised if the call to connect fails:. EINTR - the attempt to establish the connection was interrupted by delivery of a signal that was caught; the connection will be established asynchronously.

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. On Windows systems the following system exceptions may be raised if the call to connect fails:. Or a nonblocking connect call is in progress on the socket. EFAULT - the socket's internal address or address length parameter is too small or is not a valid part of the user space address.

WaitWritable exception, but return the symbol: Listens for connections, using the specified int as the backlog. It will not work on Windows, because Windows requires that the socket is bound by calling bind before it can listen. If the backlog amount exceeds the implementation-dependent maximum queue length, the implementation's maximum queue length will be used.

On unix-based based systems the following system exceptions may be raised if the call to listen fails:. On Windows systems the following system exceptions may be raised if the call to listen fails:. Receives up to maxlen bytes from socket. The first element of the results, mesg , is the data received. On unix-based based systems the following system exceptions may be raised if the call to recvfrom fails:.

On Windows systems the following system exceptions may be raised if the call to recvfrom fails:. EFAULT - the internal buffer and from parameters on socket are not part of the user address space, or the internal fromlen parameter is too small to accommodate the peer address.

The call to recvfrom is not permitted with a connected socket on a socket that is connection oriented or connectionless. OOB data is not supported in the communication domain associated with socket , or socket is unidirectional and supports only send operations. It is not possible to call recvfrom on a socket after shutdown has been invoked. The application should close the socket; it is no longer usable.

The meaning depends on the socket: Refer to Socket accept for the exceptions that may be thrown if the call to sysaccept fails. Sockets have their own vocabulary: The family of protocols: The type of communications between the two endpoints, typically Socket:: This may be used to identify a variant of a protocol. The identifier of a network interface: Let's create an internet socket using the IPv4 protocol in a C-like manner: