add IPPROTO_HOPOPTS to in.h

diff --git a/include/netinet/in.h b/include/netinet/in.h
index 62cbfa8d322d4766b51019094dee63de2ff7641a..f2f89aba0ca1c4695f82be2c8786ee1520450f8a 100644 (file)
--- a/include/netinet/in.h
+++ b/include/netinet/in.h
@@ -71,6 +71,7 @@ uint32_t ntohl(uint32_t);
 uint16_t ntohs(uint16_t);
 
 #define IPPROTO_IP       0
+#define IPPROTO_HOPOPTS  0
 #define IPPROTO_ICMP     1
 #define IPPROTO_IGMP     2
 #define IPPROTO_IPIP     4