VIPC PCI
VINES InterProcess Communications Protocol
Move the mouse pointer to any protocol field and press the left mouse button.
IPC is a connectionless transport protocol (different to connection-oriented SPP).
4 - VSPP - VINES Sequenced Packet Protocol
There are two different types of IPC operation:
1. IPC Unreliable Datagram (only fields 1 to 4 = 6 bytes).
2. IPC Reliable Message (all fields = 16 bytes).
Transmission by unreliable datagram" is unacknowledged; transmission by reliable datagram" is acknowledged but without data flow control (different to SPP).
IPC Unreliable Datagram Service
> Process uses to send up to 1450 bytes in single packet.
> Unacknowledged, delivery not guaranteed, may be replicated.
> Series of packets can arrive in different order than sent.
> May be sent to single process, or broadcast to multiple processes.
IPC Reliable Message Service
> Process uses to send up to 5800 bytes in single message.
> Acknowledged, guaranteed to be delivered once.
> Series of reliable messages arrive in order sent.
> Cannot be broadcast to multiple processes.
IPC Reliable Message
> Transferred in network as 1 to 4 packets of 1450 bytes each.
> Process is not aware reliable message is broken up.
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