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Diffstat (limited to 'sysdeps/unix/sysv/linux/netinet/in.h')
-rw-r--r--sysdeps/unix/sysv/linux/netinet/in.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/netinet/in.h b/sysdeps/unix/sysv/linux/netinet/in.h
index 3dea878a21..c1df8250c0 100644
--- a/sysdeps/unix/sysv/linux/netinet/in.h
+++ b/sysdeps/unix/sysv/linux/netinet/in.h
@@ -164,6 +164,9 @@ struct sockaddr_in
#define IP_ADD_MEMBERSHIP 35 /* ip_mreq; add an IP group membership */
#define IP_DROP_MEMBERSHIP 36 /* ip_mreq; drop an IP group membership */
+/* To select the IP level. */
+#define SOL_IP 0
+
/* Structure used to describe IP options for IP_OPTIONS. The `ip_dst'
field is used for the first-hop gateway when using a source route
(this gets put into the header proper). */