mirror of
https://github.com/yarrick/iodine.git
synced 2024-11-22 13:06:06 +03:00
69 lines
1.9 KiB
Plaintext
69 lines
1.9 KiB
Plaintext
Detailed specification of protocol in version 00000403
|
|
======================================================
|
|
|
|
CMC = 2 byte Cache Miss Counter, increased every time it is used
|
|
|
|
Version:
|
|
Client sends:
|
|
First byte v or V
|
|
Rest encoded with base32:
|
|
4 bytes big endian protocol version
|
|
CMC
|
|
Server replies:
|
|
4 chars:
|
|
VACK (version ok), followed by login challenge
|
|
VNAK (version differs), followed by server protocol version
|
|
VFUL (server has no free slots), followed by max users
|
|
4 byte value: means login challenge/server protocol version/max users
|
|
1 byte userid of the new user, or any byte if not VACK
|
|
|
|
Login:
|
|
Client sends:
|
|
First byte l or L
|
|
Rest encoded with base32:
|
|
1 byte userid
|
|
16 bytes MD5 hash of: (first 32 bytes of password) xor (8 repetitions of login challenge)
|
|
CMC
|
|
Server replies:
|
|
LNAK means not accepted
|
|
x.x.x.x-y.y.y.y-mtu means accepted (server ip, client ip, mtu)
|
|
|
|
Case check:
|
|
Client sends:
|
|
First byte z or Z
|
|
Lots of data that should not be decoded
|
|
Server replies:
|
|
The requested domain copied raw
|
|
|
|
Switch codec:
|
|
Client sends:
|
|
First byte s or S
|
|
One byte ASCII digit, meaning userid
|
|
One byte ASCII digit, with value 5 or 6, representing number of bits per byte in encoding
|
|
Server sends:
|
|
Name of codec if accepted. After this all upstream data packets must be encoded with the new codec.
|
|
BADCODEC if not accepted. Client must then revert to Base32
|
|
|
|
Data:
|
|
Data header:
|
|
321 0
|
|
+---+-+
|
|
|UUU|L|
|
|
+---+-+
|
|
|
|
UUU = Userid
|
|
L = Last fragment in packet flag
|
|
|
|
First 4 bits coded as hex in ASCII.
|
|
Followed by data encoded with the chosen codec.
|
|
|
|
Ping:
|
|
Command = 0x04, User = userid
|
|
Client sends:
|
|
Only a CMC
|
|
|
|
The server responses to Ping and Data packets is a DNS NULL type response:
|
|
If server has nothing to send, data length is 0 bytes.
|
|
If server has a packet to send, data length is set and the data is a full raw
|
|
unencoded ip packet, prefixed with 32 bits tun data.
|