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71 lines
2.3 KiB
Markdown
71 lines
2.3 KiB
Markdown
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# Minitel for OpenOS
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This package includes the Minitel daemon, in etc/rc.d/minitel.lua, and the net library for using minitel, in usr/lib/net.lua.
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## Minitel daemon
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### Installation
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1. Place minitel.lua into /etc/rc.d
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2. Place your hostname into /etc/hostname
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3. Run rc minitel enable; rc minitel start
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### Configuration
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The minitel daemon does not keep a configuration file, so settings have to be set every boot.
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To change a setting, one invokes:
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`rc minitel set_<option> value`
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#### Available settings
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- port: the physical port the protocol runs over
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- pctime: the amount of time packets are kept in the packet cache
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- retry: how many seconds between resend attempts of reliable packets
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- rctime: How long items are kept in the routing cache
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In addition, one can invoke *rc minitel debug* to get large amounts of debug output, *rc minitel set_route <hostname> <local_modem> <remote_modem>* to add a static route, and *rc minitel del_route <hostname>* to delete a static route.
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## Net library
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The net library provides an easy way of interacting with the minitel daemon, and implements higher-level features of the stack.
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### API
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#### Layer 3
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*net.genPacketID()* - returns a string of random data
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*net.usend(host, port, data, pid)* - Sends an unreliable packet to *host* on *port* containing *data*, optionally with the packet ID *pid*.
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*net.rsend(host, port, data)* - Sends a reliable packet to *host* on *port* containing *data*.
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#### Layer 4
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*net.send(host, port, data)* - Sends *data* reliably and in order to *host* on *port*.
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#### Layer 5
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*net.open(to,port)* - Establishes a stream to *host* on *port* and returns a stream object
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*net.listen(port)* - Waits for another node to establish a stream, and returns the stream object.
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#### Stream objects
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*stream:write(data)* - Sends *data* to the node at the other end of the stream
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*stream:read(length)* - Reads data from the stream, up to *length* bytes.
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*stream:close()* - Ends the stream and prevents further writing.
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#### Variables
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*net.mtu = 4096* - The maximum length of the data portion of a packet for *net.send*
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*net.streamdelay = 60* - The time, in seconds, *net.open* will wait for a response while trying to establish a connection.
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*net.minport = 32768* - The lowest port *net.listen* will allocate to a new connection.
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*net.maxport = 65535* - The highest port *net.listen* will allocate to a new connection.
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