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-rw-r--r--bits/in.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/bits/in.h b/bits/in.h
index bb14b02..db93057 100644
--- a/bits/in.h
+++ b/bits/in.h
@@ -21,6 +21,9 @@
# error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
#endif
+/* To select the IP level. */
+#define SOL_IP 0
+
/* Options for use with `getsockopt' and `setsockopt' at the IP level.
The first word in the comment at the right is the data type used;
"bool" means a boolean value stored in an `int'. */
@@ -47,6 +50,10 @@ struct ip_opts
char ip_opts[40]; /* Actually variable in size. */
};
+/* Socket-level values for IPv6. */
+#define SOL_IPV6 41
+#define SOL_ICMPV6 58
+
/* IPV6 socket options. */
#define IPV6_ADDRFORM 1
#define IPV6_PKTINFO 2