networkd: bump MTU to 1280 for interfaces which have IPv6 enabled (#3077)

[elogind.git] / src / basic / missing.h

diff --git a/src/basic/missing.h b/src/basic/missing.h
index f50ba94706fcf2386b7a46f65fb1535d91823d9f..0175747f8d1d40b8743514caf963b2ee908979c7 100644 (file)
--- a/src/basic/missing.h
+++ b/src/basic/missing.h
@@ -959,6 +959,10 @@ static inline int setns(int fd, int nstype) {
 #define IPV6_UNICAST_IF 76
 #endif
 
+#ifndef IPV6_MIN_MTU
+#define IPV6_MIN_MTU 1280
+#endif
+
 #ifndef IFF_MULTI_QUEUE
 #define IFF_MULTI_QUEUE 0x100
 #endif