devn-fd.so

File descriptor interface driver

Syntax:

io-pkt-variant -d fd fd=device[,option[,option ...]] ... &

where variant is one of v4, v4-hc, or v6-hc.

Runs on:

Neutrino

Options:

---

Use commas, not spaces, to separate the options.

---

ahdlc

Read or write packet data in AHDLC frame format.

fd=device

The device on which to open the file descriptor to read or write packet data. You must specify this option.

lan=num

The LAN number. The default is 0.

mac=XXXXXXXXXXXX

The MAC address of the controller. There is no default.

mru=num

Maximum receive unit. The default is 1514.

mtu=num

Maximum transmission unit. The default (1514) is automatically detected on supported hardware.

nomulticast

Disable multicast support.

priority=N

Priority of the driver event-thread. The default is 21.

promiscuous

Enable promiscuous mode. The default is off.

verbose
verbose=num

Be verbose. Specify num for more verbosity (num can be 1-4, the higher the number, the more detailed the output). The default is 0. The output goes to slogger, invoke sloginfo to view.

Description:

The devn-fd.so driver uses file-descriptor based I/O (i.e. open(), read(), write(), and so on) to receive and transmit packets. It provides the Network Manager (io-pkt*) with reliable data transfer over any media supported by a file-descriptor-based server process.

---

The devn-fd.so driver does not support multicast addresses.

---

For example, you could use devn-fd.so to connect two machines with a null-modem RS-232 serial cable. By using file-descriptor I/O to the serial devices, devn-fd.so would implicitly use a serial driver and set up a logical network link.

This is a legacy io-net driver; its interface names are in the form enX, where X is an integer.

Examples:

Start io-pkt-v4-hc using the FD driver:

io-pkt-v4-hc -d fd fd=/dev/ser1,mac=0023456789AB,ahdlc
ifconfig en0 10.0.184

Files:

/dev/io-net

The directory where, by default, drivers and protocol modules add entries. For more information, see the documentation for io-pkt*.

Caveats:

You must specify the fd option when using this driver.

See also:

devn-*, devnp-*, ifconfig, io-pkt*, nicinfo