Книга: Distributed operating systems

7.6.6. The TCP/IP Server

7.6.6. The TCP/IP Server

Although Amoeba uses the FLIP protocol internally to achieve high performance, sometimes it is necessary to speak TCP/IP, for example, to communicate vim X terminals, to send and receive mail to non-Amoeba machines and to interact with other Amoeba systems via the Internet. To permit Amoeba to do these things, a TCP/IP server has been provided.

To establish a connection, an Amoeba process does an RPC with the TCP/IP server giving it a TCP/IP address. The caller is then blocked until the connection has been established or refused. In the reply, the TCP/IP server provides a capability for using the connection. Subsequent RPCs can send and receive packets from the remote machine without the Amoeba process having to know that TCP/IP is being used. This mechanism is less efficient than FLIP, so it is used only when it is not possible to use FLIP.

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