Current File : //opt/alt/ruby18/share/ri/1.8/system/UDPSocket/recvfrom_nonblock-i.yaml
--- !ruby/object:RI::MethodDescription
aliases: []
block_params:
comment:
- !ruby/struct:SM::Flow::P
body: Receives up to <em>maxlen</em> bytes from <tt>udpsocket</tt> using recvfrom(2) after O_NONBLOCK is set for the underlying file descriptor. <em>flags</em> is zero or more of the <tt>MSG_</tt> options. The first element of the results, <em>mesg</em>, is the data received. The second element, <em>sender_inet_addr</em>, is an array to represent the sender address.
- !ruby/struct:SM::Flow::P
body: When recvfrom(2) returns 0, Socket#recvfrom_nonblock returns an empty string as data. It means an empty packet.
- !ruby/struct:SM::Flow::H
level: 3
text: Parameters
- !ruby/object:SM::Flow::LIST
contents:
- !ruby/struct:SM::Flow::LI
label: "*"
body: <tt>maxlen</tt> - the number of bytes to receive from the socket
- !ruby/struct:SM::Flow::LI
label: "*"
body: <tt>flags</tt> - zero or more of the <tt>MSG_</tt> options
type: :BULLET
- !ruby/struct:SM::Flow::H
level: 3
text: Example
- !ruby/struct:SM::Flow::VERB
body: " require 'socket'\n s1 = UDPSocket.new\n s1.bind("127.0.0.1", 0)\n s2 = UDPSocket.new\n s2.bind("127.0.0.1", 0)\n s2.connect(*s1.addr.values_at(3,1))\n s1.connect(*s2.addr.values_at(3,1))\n s1.send "aaa", 0\n IO.select([s2])\n p s2.recvfrom_nonblock(10) #=> ["aaa", ["AF_INET", 33302, "localhost.localdomain", "127.0.0.1"]]\n"
- !ruby/struct:SM::Flow::P
body: Refer to Socket#recvfrom for the exceptions that may be thrown if the call to <em>recvfrom_nonblock</em> fails.
- !ruby/struct:SM::Flow::P
body: UDPSocket#recvfrom_nonblock may raise any error corresponding to recvfrom(2) failure, including Errno::EAGAIN.
- !ruby/struct:SM::Flow::H
level: 3
text: See
- !ruby/object:SM::Flow::LIST
contents:
- !ruby/struct:SM::Flow::LI
label: "*"
body: Socket#recvfrom
type: :BULLET
full_name: UDPSocket#recvfrom_nonblock
is_singleton: false
name: recvfrom_nonblock
params: |
udpsocket.recvfrom_nonblock(maxlen) => [mesg, sender_inet_addr]
udpsocket.recvfrom_nonblock(maxlen, flags) => [mesg, sender_inet_addr]
visibility: public
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