ipn/ipnlocal: add PROXY protocol support to Funnel/Serve

This adds the --proxy-protocol flag to 'tailscale serve' and
'tailscale funnel', which tells the Tailscale client to prepend a PROXY
protocol[1] header when making connections to the proxied-to backend.

I've verified that this works with our existing funnel servers without
additional work, since they pass along source address information via
PeerAPI already.

Updates #7747

[1]: https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt

Change-Id: I647c24d319375c1b33e995555a541b7615d2d203
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
This commit is contained in:
Andrew Dunham
2025-10-20 11:40:30 -04:00
parent 653d0738f9
commit 3a41c0c585
16 changed files with 217 additions and 37 deletions

View File

@@ -85,6 +85,7 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
💣 github.com/modern-go/reflect2 from github.com/json-iterator/go
github.com/munnerz/goautoneg from k8s.io/kube-openapi/pkg/handler3+
github.com/opencontainers/go-digest from github.com/distribution/reference
github.com/pires/go-proxyproto from tailscale.com/ipn/ipnlocal
github.com/pkg/errors from github.com/evanphx/json-patch/v5+
D github.com/prometheus-community/pro-bing from tailscale.com/wgengine/netstack
github.com/prometheus/client_golang/internal/github.com/golang/gddo/httputil from github.com/prometheus/client_golang/prometheus/promhttp