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65888d95c9
This commit introduces a userspace program for managing an experimental eBPF XDP STUN server program. derp/xdp contains the eBPF pseudo-C along with a Go pkg for loading it and exporting its metrics. cmd/xdpderper is a package main user of derp/xdp. Updates tailscale/corp#20689 Signed-off-by: Jordan Whited <jordan@tailscale.com>
46 lines
1.3 KiB
Go
46 lines
1.3 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package xdp
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// XDPAttachFlags represents how XDP program will be attached to interface. This
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// is a mirror of cilium/ebpf/link.AttachFlags, without pulling it in for
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// non-Linux.
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type XDPAttachFlags uint32
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const (
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// XDPDriverFallbackGenericMode attempts XDPDriverMode, and falls back to
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// XDPGenericMode if the driver does not support XDP.
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XDPDriverFallbackGenericMode = 0
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)
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const (
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// XDPGenericMode (SKB) links XDP BPF program for drivers which do
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// not yet support native XDP.
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XDPGenericMode XDPAttachFlags = 1 << (iota + 1)
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// XDPDriverMode links XDP BPF program into the driver’s receive path.
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XDPDriverMode
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// XDPOffloadMode offloads the entire XDP BPF program into hardware.
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XDPOffloadMode
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)
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// STUNServerConfig represents the configuration of a STUNServer.
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type STUNServerConfig struct {
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DeviceName string
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DstPort int
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AttachFlags XDPAttachFlags
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// Return XDP verifier errors in their entirety. This is a multiline error
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// that can be very long. Full verifier errors are primarily useful during
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// development, but should be mostly unexpected in a production environment.
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FullVerifierErr bool
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}
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type STUNServerOption interface {
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apply(*stunServerOptions)
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}
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type stunServerOptions struct {
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//lint:ignore U1000 used in xdp_linux_test.go
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noAttach bool
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}
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