devnp-vdevpeer-net.so

io-pkt-* driver that provides the hypervisor host with a network interface to connect to a guest's virtio-net vdev

Note: The devnp-vdevpeer-net.so driver is not a QNX hypervisor component. It is a QNX SDP system component. It is described here for the convenience of hypervisor users.

Syntax:

io-pkt-v4-hc -d vdevpeer-net [peer=path,option[,option...]
		[,peer=path,option,[,option...]...]]

io-pkt-v6-hc ...

Runs on:

QNX Neutrino

Options:

peer=path: Path of the peer to communicate with
mac=XXXXXXXXXXXX: MAC address of this peer
name=peername: Prefix to the name of this peer; default is “vp”
bind=path: Path of the network interface for this driver instance
legacy: Specify to indicate that the virtio_net_header on received packets doesn't have the num_buffers field and so, is 2 bytes smaller. This field is present if the peer negotiates VIRTIO_NET_F_MRG_RXBUF or if the peer is compliant with VIRTIO 1.0 or later.
The default behavior is to assume that the peer is compliant with VIRTIO 1.0 or later, or is VIRTIO 0.9.5-compliant and has negotiated VIRTIO_NET_F_MRG_RXBUF.
priority=level: Priority level to set for the TX thread

Description:

The devnp-vdevpeer-net.so driver enables an io-pkt-* networking manager running in the host to communicate with virtual network devices configured for guests. The driver works with both the io-pkt-v4-hc and io-pkt-v6-hc stack variants. It is used for peer-to-peer communication between the hypervisor host and guests, and can be used to facilitate communication between guests and the outside world, by enabling a bridge running in the host's networking manager to connect guests to the outside world.

To use the devnp-vdevpeer-net.so driver to set up peer-to-peer communication in a hypervisor system and with the outside world:

In the hypervisor host, start io-pkt-*, specifying the devnp-vdevpeer-net.so driver, and using the driver options to configure the node in the hypervisor host: the connection path, the MAC address, the path to the node in the guest, and, optionally, a name for the node. For example:
```
io-pkt-v6-hc -d vdevpeer-net \
	peer=/dev/qvm/vt1,bind=/pkt/vp0,mac=a0b0c0d0e0f0
```
where /dev/qvm/vt1 is the path of the peer to communicate with, /pkt/vp0 is the path to the peer node (the guest), and a0b0c0d0e0f0 is this peer node's MAC address.
Configure the IP address of the peer node; for example:
```
ifconfig vp0 192.0.2.1
```
where vp0 is the peer node, and 192.0.2.1 is its IP address.
In the qvm configuration file for the VM that will host the guest, configure the virtio-net vdev (see “vdev virtio-net” in the “Virtual Device Reference” chapter).

For more information about setting up peer-to-peer communications, see “Networking” in the “Using a QNX Hypervisor System” chapter.