socket_getpeername
(PHP 4 >= 4.0.7, PHP 5)
socket_getpeername — Queries the remote side of the given socket which may either result in host/port or in a Unix filesystem path, dependent on its type
Описание
Queries the remote side of the given socket which may either result in host/port or in a Unix filesystem path, dependent on its type.
Список параметров
- socket
-
A valid socket resource created with socket_create() or socket_accept().
- address
-
If the given socket is of type AF_INET or AF_INET6, socket_getpeername() will return the peers (remote) IP address in appropriate notation (e.g. 127.0.0.1 or fe80::1) in the address parameter and, if the optional port parameter is present, also the associated port.
If the given socket is of type AF_UNIX, socket_getpeername() will return the Unix filesystem path (e.g. /var/run/daemon.sock) in the address parameter.
- port
-
If given, this will hold the port associated to address .
Возвращаемые значения
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки. socket_getpeername() may also return FALSE if the socket type is not any of AF_INET, AF_INET6, or AF_UNIX, in which case the last socket error code is not updated.
Примечания
Замечание: socket_getpeername() should not be used with AF_UNIX sockets created with socket_accept(). Only sockets created with socket_connect() or a primary server socket following a call to socket_bind() will return meaningful values.
- socket_accept
- socket_bind
- socket_clear_error
- socket_close
- socket_cmsg_space
- socket_connect
- socket_create_listen
- socket_create_pair
- socket_create
- socket_get_option
- socket_getopt
- socket_getpeername
- socket_getsockname
- socket_import_stream
- socket_last_error
- socket_listen
- socket_read
- socket_recv
- socket_recvfrom
- socket_recvmsg
- socket_select
- socket_send
- socket_sendmsg
- socket_sendto
- socket_set_block
- socket_set_nonblock
- socket_set_option
- socket_setopt
- socket_shutdown
- socket_strerror
- socket_write
Коментарии
socket_getpeername will not work for UDP sockets. Instead, use socket_recvfrom - it provides the IP address and port of the source server - eg:
$size=socket_recvfrom($socket,$input,65535,0,$ipaddress,$port);
echo "Received [$input] ($size bytes) from IP $ipaddress Port $port\n";
The reason it won't work for UDP is that UDP is stateless; logically there are no peers other than at the time a packet is sent or received. Or more strictly, a UDP socket can interact with 0..N peers.