recvfrom fd=4 buflen=512
recvfrom=EAGAIN
+0.000116
+ select max=6 rfds=null wfds=[5] efds=null to=0.000000
+ select=1 rfds=null wfds=[5] efds=null
++0.000001
read fd=5 buflen=1
read=EAGAIN
- +0.000123
+ +0.000122
write fd=5
002b3123 01000001 00000000 00000134 03323034 02353003 31353807 696e2d61
64647204 61727061 00000c00 01.