#Letter#
#Sender (Seeder) / Receiver (Leecher)#
#??LEDBAT??#
#socket API#
#user space#
#kernel space#
#raw socket implementation#
#transport protocol#
#Linux kernel implementation#
#piece (binmap)
management#
#piece (binmap)
management#
#file
management#
#hash
management#
#peer discovery#