Defined by RFC 2236
| + | Bits 0–7 | 8–15 | 16–31 | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | Type | Max Resp Time | Checksum | |||||||||||||||||||||||||||||
| 32 | Group Address | |||||||||||||||||||||||||||||||
Where:
- Type is Membership Query (0x11), Membership Report (IGMPv1: 0x12, IGMPv2: 0x16), Leave Group (0x17) IGMPv3 adds type Membership Report (0x22)
- Max Resp Time specifies the time limit for the corresponding report. The field has a resolution of 100 miliseconds, the value is taken directly. This field is meaningful only in Membership Query (0x11); in other messages it is set to 0 and ignored by the receiver.
Read more about this topic: Internet Group Management Protocol
Famous quotes containing the words packet and/or structure:
“The captain was a duck
With a packet on his back,
And when the ship began to move
The captain said, Quack! Quack!”
—Mother Goose (fl. 17th–18th century. I saw a ship a-sailing (l. 13–16)
“... the structure of a page of good prose is, analyzed logically, not something frozen but the vibrating of a bridge, which changes with every step one takes on it.”
—Robert Musil (1880–1942)