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ipn/localapi: make tailscale debug derp STUNOnly-aware (#16927)

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Fixes #16926

Signed-off-by: Jordan Whited <jordan@tailscale.com>
This commit is contained in:
Jordan Whited
2025-08-22 15:11:51 -07:00
committed by GitHub
parent b558f81a82
commit 86a5292c03
1 changed files with 47 additions and 43 deletions
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4
ipn/localapi/debugderp.go
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@@ -228,6 +228,7 @@ func (h *Handler) serveDebugDERPRegion(w http.ResponseWriter, r *http.Request) {
// Start by checking whether we can establish a HTTP connection // Start by checking whether we can establish a HTTP connection
for _, derpNode := range reg.Nodes { for _, derpNode := range reg.Nodes {
if !derpNode.STUNOnly {
connSuccess := checkConn(derpNode) connSuccess := checkConn(derpNode)
// Verify that the /generate_204 endpoint works // Verify that the /generate_204 endpoint works
@@ -278,6 +279,9 @@ func (h *Handler) serveDebugDERPRegion(w http.ResponseWriter, r *http.Request) {
if len(serverPubKeys) > 1 { if len(serverPubKeys) > 1 {
st.Errors = append(st.Errors, fmt.Sprintf("Received multiple server public keys (%d); is the DERP server behind a load balancer?", len(serverPubKeys))) st.Errors = append(st.Errors, fmt.Sprintf("Received multiple server public keys (%d); is the DERP server behind a load balancer?", len(serverPubKeys)))
} }
} else {
st.Info = append(st.Info, fmt.Sprintf("Node %q is marked STUNOnly; skipped non-STUN checks", derpNode.HostName))
}
// Send a STUN query to this node to verify whether or not it // Send a STUN query to this node to verify whether or not it
// correctly returns an IP address. // correctly returns an IP address.