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feature/featuretags, all: add build features, use existing ones in more places

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Updates #12614

Change-Id: I4c3fe06d32c49edb3a4bb0758a8617d83f291cf5
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2025-09-30 14:47:40 -07:00
committed by Brad Fitzpatrick
parent aa5b2ce83b
commit c45f8813b4
35 changed files with 407 additions and 166 deletions
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ipn/ipnlocal/c2n.go
+30 -17
View File
@@ -10,6 +10,7 @@ import (
"net/http"
"path"
"reflect"
"runtime"
"strconv"
"strings"
"time"
@@ -33,26 +34,34 @@ import (
// exists for that, a map entry with an empty method is used as a fallback.
var c2nHandlers = map[methodAndPath]c2nHandler{
// Debug.
req("/echo"): handleC2NEcho,
req("/debug/goroutines"): handleC2NDebugGoroutines,
req("/debug/prefs"): handleC2NDebugPrefs,
req("/debug/metrics"): handleC2NDebugMetrics,
req("/debug/component-logging"): handleC2NDebugComponentLogging,
req("/debug/logheap"): handleC2NDebugLogHeap,
req("/debug/netmap"): handleC2NDebugNetMap,
req("/echo"): handleC2NEcho,
}
// PPROF - We only expose a subset of typical pprof endpoints for security.
req("/debug/pprof/heap"): handleC2NPprof,
req("/debug/pprof/allocs"): handleC2NPprof,
func init() {
if buildfeatures.HasSSH {
RegisterC2N("/ssh/usernames", handleC2NSSHUsernames)
}
if buildfeatures.HasLogTail {
RegisterC2N("POST /logtail/flush", handleC2NLogtailFlush)
}
if buildfeatures.HasDebug {
RegisterC2N("POST /sockstats", handleC2NSockStats)
req("POST /logtail/flush"): handleC2NLogtailFlush,
req("POST /sockstats"): handleC2NSockStats,
// pprof:
// we only expose a subset of typical pprof endpoints for security.
RegisterC2N("/debug/pprof/heap", handleC2NPprof)
RegisterC2N("/debug/pprof/allocs", handleC2NPprof)
// SSH
req("/ssh/usernames"): handleC2NSSHUsernames,
// Linux netfilter.
req("POST /netfilter-kind"): handleC2NSetNetfilterKind,
RegisterC2N("/debug/goroutines", handleC2NDebugGoroutines)
RegisterC2N("/debug/prefs", handleC2NDebugPrefs)
RegisterC2N("/debug/metrics", handleC2NDebugMetrics)
RegisterC2N("/debug/component-logging", handleC2NDebugComponentLogging)
RegisterC2N("/debug/logheap", handleC2NDebugLogHeap)
RegisterC2N("/debug/netmap", handleC2NDebugNetMap)
}
if runtime.GOOS == "linux" && buildfeatures.HasOSRouter {
RegisterC2N("POST /netfilter-kind", handleC2NSetNetfilterKind)
}
}
// RegisterC2N registers a new c2n handler for the given pattern.
@@ -265,6 +274,10 @@ func handleC2NPprof(b *LocalBackend, w http.ResponseWriter, r *http.Request) {
}
func handleC2NSSHUsernames(b *LocalBackend, w http.ResponseWriter, r *http.Request) {
if !buildfeatures.HasSSH {
http.Error(w, feature.ErrUnavailable.Error(), http.StatusNotImplemented)
return
}
var req tailcfg.C2NSSHUsernamesRequest
if r.Method == "POST" {
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {