protos

General form:
[proto header, byte version, ...]
v1 proto	[char mType, uint pktid, ...]
	mTypes:
		DH requests
		DH encapsulated
		AES encapsulated

DH requests:
	[all DH handshake messages]

DH encapsulated:
	[PKI handshakes]
	PKI encapsulated:
		[AES handshake]
	[DHT messages]

AES encapsulated:
	[data messages]

protocol:
	get packet & tear off header
	from pktid, enum to message type
		decode the inner protocol
		throw event for keys if needed?
			(enum type)


Max pkt: 65,507 bytes (chunked)
Min maximum pkt size: 576 bytes -> 512 useable
Common MTU: 1500 -> 1408

# Sent to initiate a file transfer
Init get -> [char mType, ushort id, 160bit hash]
# Reply to initiation with file metadata
Init get resp -> [char mType, ushort id, 160bit hash, ulong chunkCount, ulong chunkSize]

I/O request -> [char mType, ushort id, 160bit hash, chunkNo]
I/O resend -> [char mType, ushort id, 160bit hash, chunkNo, slices(ushort? arr)]
Awk -> [char mType, ushort awkID]
I/O send -> [char mType, ushort id, 160bit hash, chunkNo, sliceNo, DATA]
File request -> [char mType, ushort id, 160bit hash]
File response -> [char mType, ushort id, ulonglong size (8 byte), [160bit hashes]]
	#NOTE -> Only supports 3274 hashes. This will need pkt continuation for files > 63.94gb @ 20MB/chunk


Encryption:
	[enc. flag, payload[type, id, payload]]

Walkthrough:

Client								Peer
	# ANY PACKET
Packet(type, id, payload)
									Awk(id)
On failure to receive awk:
Resends packet after 3*ave ping

	# HANDSHAKE
Sends nonce enc. w/ pub key
									If (client is known) return enc. nonce
									else return /dev/urand
	# SEARCH


	# FILE TRANSFER
GetFile(hash)
									FileResponse(hash, name, size, [chunk hashes])
FileStatus(hash)
									CompletedChunks(chunk flags)
I/O request(hash, chunkNo)
									I/O send(hash, chunkNo, sliceNo, DATA)
									I/O send(hash, chunkNo, sliceNo, DATA)
									# Max of 323 slices per chunk (20MB / 65,000B)
I/O resend(hash, chunkNo, slices(bitarr))