OwlCyberSecurity - MANAGER

Edit File: 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>socket</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_sockaddr</em>, contains protocol-specific information on the sender. - !ruby/struct:SM::Flow::P body: "When recvfrom(2) returns 0, Socket#recvfrom_nonblock returns an empty string as data. The meaning depends on the socket: EOF on TCP, empty packet on UDP, etc." - !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: " # In one file, start this first\n require 'socket'\n include Socket::Constants\n socket = Socket.new(AF_INET, SOCK_STREAM, 0)\n sockaddr = Socket.sockaddr_in(2200, 'localhost')\n socket.bind(sockaddr)\n socket.listen(5)\n client, client_sockaddr = socket.accept\n begin\n pair = client.recvfrom_nonblock(20)\n rescue Errno::EAGAIN, Errno::EWOULDBLOCK\n IO.select([client])\n retry\n end\n data = pair[0].chomp\n puts &quot;I only received 20 bytes '#{data}'&quot;\n sleep 1\n socket.close\n\n # In another file, start this second\n require 'socket'\n include Socket::Constants\n socket = Socket.new(AF_INET, SOCK_STREAM, 0)\n sockaddr = Socket.sockaddr_in(2200, 'localhost')\n socket.connect(sockaddr)\n socket.puts &quot;Watch this get cut short!&quot;\n socket.close\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: Socket#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: Socket#recvfrom_nonblock is_singleton: false name: recvfrom_nonblock params: | socket.recvfrom_nonblock(maxlen) => [mesg, sender_sockaddr] socket.recvfrom_nonblock(maxlen, flags) => [mesg, sender_sockaddr] visibility: public