[hurd] Add MTU_DISCOVER values

diff --git a/bits/in.h b/bits/in.h
index 7ce455f..10aa2a7 100644 (file)
--- a/bits/in.h
+++ b/bits/in.h
@@ -44,6 +44,18 @@
 #define IP_ADD_MEMBERSHIP 12   /* ip_mreq; add an IP group membership */
 #define IP_DROP_MEMBERSHIP 13  /* ip_mreq; drop an IP group membership */
 
+/* IP_MTU_DISCOVER arguments.  */
+#define IP_PMTUDISC_DONT   0   /* Never send DF frames.  */
+#define IP_PMTUDISC_WANT   1   /* Use per route hints.  */
+#define IP_PMTUDISC_DO     2   /* Always DF.  */
+#define IP_PMTUDISC_PROBE  3   /* Ignore dst pmtu.  */
+/* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
+   Also incoming ICMP frag_needed notifications will be ignored on
+   this socket to prevent accepting spoofed ones.  */
+#define IP_PMTUDISC_INTERFACE           4
+/* Like IP_PMTUDISC_INTERFACE but allow packets to be fragmented.  */
+#define IP_PMTUDISC_OMIT               5
+
 #ifdef __USE_MISC
 /* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
    The `ip_dst' field is used for the first-hop gateway when using a
@@ -88,6 +100,14 @@ struct ip_opts
 #define IPV6_JOIN_ANYCAST      27
 #define IPV6_LEAVE_ANYCAST     28
 
+/* IPV6_MTU_DISCOVER values.  */
+#define IPV6_PMTUDISC_DONT     0       /* Never send DF frames.  */
+#define IPV6_PMTUDISC_WANT     1       /* Use per route hints.  */
+#define IPV6_PMTUDISC_DO       2       /* Always DF.  */
+#define IPV6_PMTUDISC_PROBE    3       /* Ignore dst pmtu.  */
+#define IPV6_PMTUDISC_INTERFACE        4       /* See IP_PMTUDISC_INTERFACE.  */
+#define IPV6_PMTUDISC_OMIT     5       /* See IP_PMTUDISC_OMIT.  */
+
 /* Advanced API (RFC3542) (1).  */
 #define IPV6_RECVPKTINFO       49
 #define IPV6_PKTINFO           50