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tailscale/derp/xdp/xdp.go

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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package xdp
// XDPAttachFlags represents how XDP program will be attached to interface. This
// is a mirror of cilium/ebpf/link.AttachFlags, without pulling it in for
// non-Linux.
type XDPAttachFlags uint32
const (
// XDPDriverFallbackGenericMode attempts XDPDriverMode, and falls back to
// XDPGenericMode if the driver does not support XDP.
XDPDriverFallbackGenericMode = 0
)
const (
// XDPGenericMode (SKB) links XDP BPF program for drivers which do
// not yet support native XDP.
XDPGenericMode XDPAttachFlags = 1 << (iota + 1)
// XDPDriverMode links XDP BPF program into the drivers receive path.
XDPDriverMode
// XDPOffloadMode offloads the entire XDP BPF program into hardware.
XDPOffloadMode
)
// STUNServerConfig represents the configuration of a STUNServer.
type STUNServerConfig struct {
DeviceName string
DstPort int
AttachFlags XDPAttachFlags
// Return XDP verifier errors in their entirety. This is a multiline error
// that can be very long. Full verifier errors are primarily useful during
// development, but should be mostly unexpected in a production environment.
FullVerifierErr bool
}
type STUNServerOption interface {
apply(*stunServerOptions)
}
type stunServerOptions struct {
//lint:ignore U1000 used in xdp_linux_test.go
noAttach bool
}