Instrument 06 · websocket / bits / frame bytes

Protocol Playground

FRAME CONSTRUCTORRFC 6455

OpcodeMask key · 4 bytes

FINfinal fragmentMASKclient frame

Payload · UTF-8

SERIALIZED FRAME21 bytes

FIN1

RSV1–3000

OPCODE0001

MASK1

LENGTH15

Wire bytes

81 8f 37 fa 21 3d 7f 9f 4d 51 58 d6 01 4d 45 95 55 52 54 95 4d

01Control bits0x81FIN + RSV + text opcode

02Length field0x8f6 header bytes before payload

03Masked payload15 BEach byte XORed with the repeating key