Class: UDPSocket

Inherits:

IPSocket

• Object
• IO
• BasicSocket
• IPSocket
• UDPSocket

Defined in:

socket.c

Instance Method Summary

• #bind ⇒ Object
• #connect ⇒ Object
• #initialize ⇒ Object constructor
• #recvfrom_nonblock(*args) ⇒ Object

  Receives up to maxlen bytes from udpsocket using recvfrom(2) after O_NONBLOCK is set for the underlying file descriptor.

• #send ⇒ Object

Methods inherited from IPSocket

#addr, getaddress, #peeraddr, #recvfrom

Methods inherited from BasicSocket

#close_read, #close_write, do_not_reverse_lookup, do_not_reverse_lookup=, for_fd, #getpeername, #getsockname, #getsockopt, #recv, #recv_nonblock, #setsockopt, #shutdown

Constructor Details

#initialize ⇒ Object

# File 'socket.c', line 1715

static VALUE
udp_init(argc, argv, sock)
int argc;

Instance Method Details

#bind ⇒ Object

# File 'socket.c', line 1776

static VALUE
udp_bind(sock, host, port)
VALUE sock, host, port;

#connect ⇒ Object

# File 'socket.c', line 1758

static VALUE
udp_connect(sock, host, port)
VALUE sock, host, port;

#recvfrom_nonblock(maxlen) ⇒ Array #recvfrom_nonblock(maxlen, flags) ⇒ Array

Receives up to maxlen bytes from udpsocket using recvfrom(2) after O_NONBLOCK is set for the underlying file descriptor. flags is zero or more of the MSG_ options. The first element of the results, mesg, is the data received. The second element, sender_inet_addr, is an array to represent the sender address.

When recvfrom(2) returns 0, Socket#recvfrom_nonblock returns an empty string as data. It means an empty packet.

Parameters

• maxlen - the number of bytes to receive from the socket

• flags - zero or more of the MSG_ options

Example

require ‘socket’ s1 = UDPSocket.new s1.bind(“127.0.0.1”, 0) s2 = UDPSocket.new s2.bind(“127.0.0.1”, 0) s2.connect(*s1.addr.values_at(3,1)) s1.connect(*s2.addr.values_at(3,1)) s1.send “aaa”, 0 IO.select() p s2.recvfrom_nonblock(10) #=> [“aaa”, [“AF_INET”, 33302, “localhost.localdomain”, “127.0.0.1”]]

Refer to Socket#recvfrom for the exceptions that may be thrown if the call to recvfrom_nonblock fails.

UDPSocket#recvfrom_nonblock may raise any error corresponding to recvfrom(2) failure, including Errno::EAGAIN.

See

• Socket#recvfrom

Overloads:

• #recvfrom_nonblock(maxlen) ⇒ Array

  Returns:

  • (Array)
• #recvfrom_nonblock(maxlen, flags) ⇒ Array

  Returns:

  • (Array)

# File 'socket.c', line 1877

static VALUE
udp_recvfrom_nonblock(int argc, VALUE *argv, VALUE sock)
{
    return s_recvfrom_nonblock(sock, argc, argv, RECV_IP);
}

#send ⇒ Object

# File 'socket.c', line 1798

static VALUE
udp_send(argc, argv, sock)
int argc;