devnp-shim.so

"Shim" driver for backward compatibility with io-net

Syntax:

io-pkt-variant -d shim options "io-net_drvr [drvr_opt,...]"

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

Runs on:

QNX Neutrino

Options:

shimrxcopy=0|1

Specify how packets are copied:

1 — copy each received packet in the shim layer as it's passed from the driver to io-pkt. You can safely remove the driver and shim via the ifconfig enX destroy command or by physically removing the device (if supported by the driver). This is the default.
0 — pass each received packet from the driver through the shim directly to io-pkt. This may improve performance, but driver and shim removal is blocked.

Description:

The devnp-shim.so shared object is a "shim" driver that lets io-pkt support devn-* drivers that were written for io-net.

Explicitly loading the shim driver is usually unnecessary; io-pkt loads the shim automatically. For example, if you type:

io-pkt -d some_driver

then io-pkt searches for devnp-some_driver.so and loads it as a native driver if found. If not found, io-pkt tries to load devn-some_driver.so via the shim.

If you type:

io-pkt -d /lib/dll/devn-some_driver.so

then io-pkt notices that the driver is an io-net one and loads it via the shim.

Note:

Shim drivers name their interface entries enX, but native drivers use a naming scheme that depends on the chipset.
You can tell if the shim has been loaded by using pidin me.

Examples:

io-pkt -d shim devn-epic.so
io-pkt -d shim "/lib/dll/devn-epic.so transmit=1024,receive=1024"