12-25-2007
I willing to do so as lon as you all can provide me a solution.
Multiples interface cannot have same subnet mask. IS it true ? I have internal and wilress.
Thanks.
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LEARN ABOUT DEBIAN
ipsec_maskof
IPSEC_INITSUBNET(3) Library Functions Manual IPSEC_INITSUBNET(3)
NAME
ipsec_initsubnet, ipsec_addrtosubnet, ipsec_subnettypeof, ipsec_masktocount, ipsec_networkof, ipsec_maskof - initialize an ip_subnet, ini-
tialize a singleton ip_subnet, get address type of an ip_subnet, convert subnet mask to bit count, get base address of an ip_subnet, get
subnet mask of an ip_subnet
SYNOPSIS
#include <freeswan.h>
const char *initsubnet(const ip_address *addr,
int maskbits, int clash, ip_subnet *dst);
const char *addrtosubnet(const ip_address *addr,
ip_subnet *dst);
int subnettypeof(const ip_subnet *src);
int masktocount(const ip_address *src);
void networkof(const ip_subnet *src, ip_address *dst);
void maskof(const ip_subnet *src, ip_address *dst);
DESCRIPTION
The <freeswan.h> library uses an internal type ip_subnet to contain a description of an IP subnet (base address plus mask). These func-
tions provide basic tools for creating and examining this type.
Initsubnet initializes a variable *dst of type ip_subnet from a base address and a count of mask bits. The clash parameter specifies what
to do if the base address includes 1 bits outside the prefix specified by the mask (that is, in the ``host number'' part of the address):
'0' zero out host-number bits
'x' non-zero host-number bits are an error
Initsubnet returns NULL for success and a pointer to a string-literal error message for failure; see DIAGNOSTICS.
Addrtosubnet initializes an ip_subnet variable *dst to a ``singleton subnet'' containing the single address *addr. It returns NULL for
success and a pointer to a string-literal error message for failure.
Subnettypeof returns the address type of a subnet, normally AF_INET or AF_INET6. (The <freeswan.h> header file arranges to include the
necessary headers for these names to be known.)
Masktocount converts a subnet mask, expressed as an address, to a bit count suitable for use with initsubnet. It returns -1 for error; see
DIAGNOSTICS.
Networkof fills in *dst with the base address of subnet src.
Maskof fills in *dst with the subnet mask of subnet src, expressed as an address.
SEE ALSO
inet(3), ipsec_ttosubnet(3), ipsec_rangetosubnet(3)
DIAGNOSTICS
Fatal errors in initsubnet are: unknown address family; unknown clash value; impossible mask bit count; non-zero host-number bits and clash
is 'x'. Fatal errors in addrtosubnet are: unknown address family. Fatal errors in masktocount are: unknown address family; mask bits not
contiguous.
HISTORY
Written for the FreeS/WAN project by Henry Spencer.
12 March 2002 IPSEC_INITSUBNET(3)