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After the socket
socket has been created using
socket_create() and bound to a name with
socket_bind(), it may be told to listen for incoming
connections on socket.
A maximum of backlog
incoming connections will be queued for processing. If a
connection request arrives with the queue full the client may
receive an error with an indication of
ECONNREFUSED, or, if the underlying protocol supports
retransmission, the request may be ignored so that retries
may succeed.
注: The maximum number passed to the backlog parameter highly depends on the underlying platform. On linux, it is silently truncated to SOMAXCONN. On win32, if passed SOMAXCONN, the underlying service provider responsible for the socket will set the backlog to a maximum reasonable value. There is no standard provision to find out the actual backlog value on this platform.
socket_listen() is applicable
only to sockets of type
SOCK_STREAM or
SOCK_SEQPACKET.
成功回傳TRUE失敗回傳FALSE。 The error code can be retrieved
with socket_last_error(). This code may be
passed to socket_strerror() to get a textual
explanation of the error.
See also socket_accept(),
socket_bind(),
socket_connect(),
socket_create() and
socket_strerror().