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all: implement pcap streaming for datapath debugging

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Updates: tailscale/corp#8470

Signed-off-by: Tom DNetto <tom@tailscale.com>
This commit is contained in:
Tom DNetto
2023-01-19 14:28:49 -08:00
committed by Tom
parent 1acdcff63e
commit 99b9d7a621
12 changed files with 422 additions and 1 deletions
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16
ipn/localapi/localapi.go
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@@ -68,6 +68,7 @@ var handler = map[string]localAPIHandler{
"debug-derp-region": (*Handler).serveDebugDERPRegion,
"debug-packet-filter-matches": (*Handler).serveDebugPacketFilterMatches,
"debug-packet-filter-rules": (*Handler).serveDebugPacketFilterRules,
"debug-capture": (*Handler).serveDebugCapture,
"derpmap": (*Handler).serveDERPMap,
"dev-set-state-store": (*Handler).serveDevSetStateStore,
"set-push-device-token": (*Handler).serveSetPushDeviceToken,
@@ -1556,6 +1557,21 @@ func defBool(a string, def bool) bool {
return v
}
func (h *Handler) serveDebugCapture(w http.ResponseWriter, r *http.Request) {
if !h.PermitWrite {
http.Error(w, "debug access denied", http.StatusForbidden)
return
}
if r.Method != "POST" {
http.Error(w, "POST required", http.StatusMethodNotAllowed)
return
}
w.WriteHeader(200)
w.(http.Flusher).Flush()
h.b.StreamDebugCapture(r.Context(), w)
}
var (
metricInvalidRequests = clientmetric.NewCounter("localapi_invalid_requests")