15 IPPORT_RESERVED
= 1024
16 IPPORT_USERRESERVED
= 5000
17 IN_CLASSA_NET
= 0xff000000
19 IN_CLASSA_HOST
= 0x00ffffff
21 IN_CLASSB_NET
= 0xffff0000
23 IN_CLASSB_HOST
= 0x0000ffff
25 IN_CLASSC_NET
= 0xffffff00
27 IN_CLASSC_HOST
= 0x000000ff
28 IN_CLASSD_NET
= 0xf0000000
30 IN_CLASSD_HOST
= 0x0fffffff
31 INADDR_ANY
= 0x00000000
32 INADDR_BROADCAST
= 0xffffffff
33 INADDR_LOOPBACK
= 0x7F000001
34 INADDR_UNSPEC_GROUP
= 0xe0000000
35 INADDR_ALLHOSTS_GROUP
= 0xe0000001
36 INADDR_MAX_LOCAL_GROUP
= 0xe00000ff
37 INADDR_NONE
= 0xffffffff
51 IP_DROP_MEMBERSHIP
= 6
52 IP_DEFAULT_MULTICAST_TTL
= 1
53 IP_DEFAULT_MULTICAST_LOOP
= 1
54 IP_MAX_MEMBERSHIPS
= 20