diff --git a/Demo/sgi/video/IN.py b/Demo/sgi/video/IN.py
new file mode 100755
index 0000000..ffc2852
--- /dev/null
+++ b/Demo/sgi/video/IN.py
@@ -0,0 +1,54 @@
+IPPROTO_IP = 0
+IPPROTO_ICMP = 1
+IPPROTO_IGMP = 2
+IPPROTO_GGP = 3
+IPPROTO_TCP = 6
+IPPROTO_EGP = 8
+IPPROTO_PUP = 12
+IPPROTO_UDP = 17
+IPPROTO_IDP = 22
+IPPROTO_TP = 29
+IPPROTO_XTP = 36
+IPPROTO_EON = 80
+IPPROTO_RAW = 255
+IPPROTO_MAX = 256
+IPPORT_RESERVED = 1024
+IPPORT_USERRESERVED = 5000
+IN_CLASSA_NET = 0xff000000
+IN_CLASSA_NSHIFT = 24
+IN_CLASSA_HOST = 0x00ffffff
+IN_CLASSA_MAX = 128
+IN_CLASSB_NET = 0xffff0000
+IN_CLASSB_NSHIFT = 16
+IN_CLASSB_HOST = 0x0000ffff
+IN_CLASSB_MAX = 65536
+IN_CLASSC_NET = 0xffffff00
+IN_CLASSC_NSHIFT = 8
+IN_CLASSC_HOST = 0x000000ff
+IN_CLASSD_NET = 0xf0000000
+IN_CLASSD_NSHIFT = 28
+IN_CLASSD_HOST = 0x0fffffff
+INADDR_ANY = 0x00000000
+INADDR_BROADCAST = 0xffffffff
+INADDR_LOOPBACK = 0x7F000001
+INADDR_UNSPEC_GROUP = 0xe0000000
+INADDR_ALLHOSTS_GROUP = 0xe0000001
+INADDR_MAX_LOCAL_GROUP = 0xe00000ff
+INADDR_NONE = 0xffffffff
+IN_LOOPBACKNET = 127
+IP_OPTIONS = 1
+IP_HDRINCL = 7
+IP_TOS = 8
+IP_TTL = 9
+IP_RECVOPTS = 10
+IP_RECVRETOPTS = 11
+IP_RECVDSTADDR = 12
+IP_RETOPTS = 13
+IP_MULTICAST_IF = 2
+IP_MULTICAST_TTL = 3
+IP_MULTICAST_LOOP = 4
+IP_ADD_MEMBERSHIP = 5
+IP_DROP_MEMBERSHIP = 6
+IP_DEFAULT_MULTICAST_TTL = 1
+IP_DEFAULT_MULTICAST_LOOP = 1
+IP_MAX_MEMBERSHIPS = 20