Commit Graph

5 Commits (46db69833399f558285dfb564c48bdafd9fa0b07)

Author SHA1 Message Date
Brad Fitzpatrick c6af5bbfe8 all: add test for package comments, fix, add comments as needed
Updates #cleanup

Change-Id: Ic4304e909d2131a95a38b26911f49e7b1729aaef
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 months ago
James Tucker 114d1caf55 derp/xdp: retain the link so that the fd is not closed
BPF links require that the owning FD remains open, this FD is embedded
into the RawLink returned by the attach function and must live for the
duration of the server.

Updates ENG-4274

Signed-off-by: James Tucker <james@tailscale.com>
5 months ago
Jordan Whited a93173b56a
cmd/xdpderper,derp/xdp: implement mode that drops STUN packets (#12527)
This is useful during maintenance as a method for shedding home client
load.

Updates tailscale/corp#20689

Signed-off-by: Jordan Whited <jordan@tailscale.com>
5 months ago
Jordan Whited 315f3d5df1
derp/xdp: fix handling of zero value UDP checksums (#12510)
validate_udp_checksum was previously indeterminate (not zero) at
declaration, and IPv4 zero value UDP checksum packets were being passed
to the kernel.

Updates tailscale/corp#20689

Signed-off-by: Jordan Whited <jordan@tailscale.com>
5 months ago
Jordan Whited 65888d95c9
derp/xdp,cmd/xdpderper: initial skeleton (#12390)
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>
5 months ago