We have three type packet:

• request
• response
• push

The type of packet and some other info can decide the length of packet. Then length of Header is 1 byte.

ℹ️Info

The length of Header is 1 byte.

Structure

 0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|  type |v|g|re.|
+-+-+-+-+-+-+-+-+

Field	Length in bit	description
type	4	packet type: 1 - request 2 - resopnse 3 - push
verify	1	if have signature data 0 - Yes 1 - No
gzip	1	if use gzip to compress data: 1 - Yes 0 - No
reserve	2	reversed

Example

// reserve - 0, gzip - 0, verify - 0,  type - 1
0b 0000 0001

// reserve - 0, gzip - 1, verify - 0, type - 2
0b 0011 0010

// reserve - 0, gzip - 1, verify - 1, type - 3
0b 0001 0011


//  reserve - 3, gzip - 1, verify - 0, type - 3
0b 1110 0011