]>
git.proxmox.com Git - mirror_edk2.git/blob - StdLib/LibC/NetUtil/inet_netof.c
2 Return the network number from an internet address.
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40 NetBSD: inet_netof.c,v 1.1 2004/05/20 23:13:02 christos Exp
41 inet_netof.c 8.1 (Berkeley) 6/4/93
43 #include <LibConfig.h>
45 #include "namespace.h"
46 #include <sys/param.h>
47 #include <netinet/in.h>
48 #include <arpa/inet.h>
51 __weak_alias(inet_netof
,_inet_netof
)
55 * Return the network number from an internet
56 * address; handles class a/b/c network #'s.
59 inet_netof(struct in_addr in
)
61 in_addr_t i
= ntohl(in
.s_addr
);
64 return (((i
)&IN_CLASSA_NET
) >> IN_CLASSA_NSHIFT
);
65 else if (IN_CLASSB(i
))
66 return (((i
)&IN_CLASSB_NET
) >> IN_CLASSB_NSHIFT
);
68 return (((i
)&IN_CLASSC_NET
) >> IN_CLASSC_NSHIFT
);