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this is awful, but also it's about 20% better

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This commit is contained in:
JackDoan
2025-11-08 14:57:33 -06:00
parent 1f043f84f3
commit 42591c2042
11 changed files with 427 additions and 19 deletions
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27
overlay/vhostnet/device.go
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@@ -311,6 +311,33 @@ func (dev *Device) TransmitPacket(vnethdr virtio.NetHdr, packet []byte) error {
return nil
}
func (dev *Device) TransmitPackets(vnethdr virtio.NetHdr, packets [][]byte) error {
// Prepend the packet with its virtio-net header.
vnethdrBuf := make([]byte, virtio.NetHdrSize+14) //todo WHY
if err := vnethdr.Encode(vnethdrBuf); err != nil {
return fmt.Errorf("encode vnethdr: %w", err)
}
vnethdrBuf[virtio.NetHdrSize+14-2] = 0x86
vnethdrBuf[virtio.NetHdrSize+14-1] = 0xdd //todo ipv6 ethertype
chainIndexes, err := dev.transmitQueue.OfferOutDescriptorChains(vnethdrBuf, packets, true)
if err != nil {
return fmt.Errorf("offer descriptor chain: %w", err)
}
//todo blocking here suxxxx
// Wait for the packet to have been transmitted.
for i := range chainIndexes {
<-dev.transmitted[chainIndexes[i]]
if err = dev.transmitQueue.FreeDescriptorChain(chainIndexes[i]); err != nil {
return fmt.Errorf("free descriptor chain: %w", err)
}
}
return nil
}
// ReceivePacket reads the next available packet from the receive queue of this
// device and returns its [virtio.NetHdr] and packet data separately.
//