resolved: add comments referencing various RFCs to various places

[thirdparty/systemd.git] / src / resolve / resolved-dns-cache.c

diff --git a/src/resolve/resolved-dns-cache.c b/src/resolve/resolved-dns-cache.c
index 3193985542d2d78b40e91309ef14d6a7b5e853fe..1c7dd56b3be8195d2547a9ef6931953540319dcb 100644 (file)
--- a/src/resolve/resolved-dns-cache.c
+++ b/src/resolve/resolved-dns-cache.c
@@ -26,7 +26,8 @@
 #include "resolved-dns-packet.h"
 #include "string-util.h"
 
-/* Never cache more than 4K entries */
+/* Never cache more than 4K entries. RFC 1536, Section 5 suggests to
+ * leave DNS caches unbounded, but that's crazy. */
 #define CACHE_MAX 4096
 
 /* We never keep any item longer than 2h in our cache */