ipn/ipnlocal: add owner-only debug handler to get process env

For debugging Synology. Like the existing goroutines handler, in that it's owner-only. Change-Id: I852f0626be8e1c0b6794c1e062111d14adc3e6ac Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago · c7bff35fee
parent 6d82a18916
commit c7bff35fee
1 changed files with 26 additions and 0 deletions
--- a/ipn/ipnlocal/peerapi.go
+++ b/ipn/ipnlocal/peerapi.go
@ -6,6 +6,7 @@ package ipnlocal
 import (
 	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"hash/crc32"
@ -29,6 +30,7 @@ import (
 	"inet.af/netaddr"
 	"tailscale.com/client/tailscale/apitype"
 	"tailscale.com/hostinfo"
 	"tailscale.com/ipn"
 	"tailscale.com/logtail/backoff"
 	"tailscale.com/net/interfaces"
@ -504,6 +506,10 @@ func (h *peerAPIHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		h.handleServeGoroutines(w, r)
 		return
 	}
 	if r.URL.Path == "/v0/env" {
 		h.handleServeEnv(w, r)
 		return
 	}
 	who := h.peerUser.DisplayName
 	fmt.Fprintf(w, `<html>
 <meta name="viewport" content="width=device-width, initial-scale=1">
@ -710,3 +716,23 @@ func (h *peerAPIHandler) handleServeGoroutines(w http.ResponseWriter, r *http.Re
 	}
 	w.Write(buf)
 }
 func (h *peerAPIHandler) handleServeEnv(w http.ResponseWriter, r *http.Request) {
 	if !h.isSelf {
 		http.Error(w, "not owner", http.StatusForbidden)
 		return
 	}
 	var data struct {
 		Hostinfo *tailcfg.Hostinfo
 		Uid      int
 		Args     []string
 		Env      []string
 	}
 	data.Hostinfo = hostinfo.New()
 	data.Uid = os.Getuid()
 	data.Args = os.Args
 	data.Env = os.Environ()
 	w.Header().Set("Content-Type", "application/json")
 	json.NewEncoder(w).Encode(data)
 }