// Test for blocking push.

// Create socket.
 +.0 socket(..., SOCK_DGRAM, IPPROTO_UDP) = 500
+.0 bind(500, ..., ...) = 0

// Send data.
+.1 sendto(500, ..., 1000) = 1000

// Send data packet.
+.0 UDP > len 1000

// Data sent.
+.0 wait(500, ...) = 0