how to change the subnet mask of interface Post: 302313697

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ipsec_hostof

IPSEC_SUBNETOF(3)					     Library Functions Manual						 IPSEC_SUBNETOF(3)

NAME

       ipsec_subnetof, ipsec_hostof, ipsec_broadcastof - given Internet address and subnet mask return subnet number, host part, broadcast address

SYNOPSIS

       #include <libreswan.h>

       struct in_addr subnetof(struct in_addr addr,
	   struct in_addr mask);
       struct in_addr hostof(struct in_addr addr,
	   struct in_addr mask);
       struct in_addr broadcastof(struct in_addr addr,
	   struct in_addr mask);

DESCRIPTION

       These functions are obsolete; see ipsec_networkof(3) for their replacements.

       Subnetof takes an Internet address and a subnet mask and returns the network part of the address (all in network byte order).  Hostof simi-
       larly returns the host part, and broadcastof returns the broadcast address (all-1s convention) for the network.

       These functions are provided to hide the Internet bit-munging inside an API, in hopes of easing the eventual transition to IPv6.

SEE ALSO

       inet(3), ipsec_atosubnet(3)

HISTORY

       Written for the FreeS/WAN project by Henry Spencer.

BUGS

       Calling functions for this is more costly than doing it yourself.

								   11 June 2001 						 IPSEC_SUBNETOF(3)