Paul Wouters

placeholder to suppress warning

IPSEC_SAMEADDR 3 28 Nov 2000 libreswan Executable programs
ipsec sameaddr ipsec addrcmp ipsec samesubnet ipsec addrinsubnet ipsec subnetinsubnet ipsec subnetishost ipsec samesaid ipsec sameaddrtype ipsec samesubnettype do comparisons for addresses, subnets, SA IDs and address families

    #include <libreswan.h>

int `sameaddr` const ip_address * a const ip_address * b int `addrcmp` const ip_address * a const ip_address * b int `samesubnet` const ip_subnet * a const ip_subnet * b int `addrinsubnet` const ip_address * a const ip_subnet * s int `subnetinsubnet` const ip_subnet * a const ip_subnet * b int `subnetishost` const ip_subnet * s int `samesaid` const ip_said * a const ip_said * b int `sameaddrtype` const ip_address * a const ip_address * b int `samesubnettype` const ip_subnet * a const ip_subnet * b

## DESCRIPTION

These functions do various comparisons and tests on the ip_address type and ip_subnet types.

Sameaddr returns non-zero if addresses `a` and `b` are identical, and `0` otherwise. Addresses of different families are never identical.

Addrcmp returns `-1`, `0`, or `1` respectively if address `a` is less than, equal to, or greater than `b`. If they are not of the same address family, they are never equal; the ordering reported in this case is arbitrary (and probably not useful) but consistent.

Samesubnet returns non-zero if subnets `a` and `b` are identical, and `0` otherwise. Subnets of different address families are never identical.

Addrinsubnet returns non-zero if address `a` is within subnet `s` and `0` otherwise. An address is never within a subnet of a different address family.

Subnetinsubnet returns non-zero if subnet `a` is a subset of subnet `b` and `0` otherwise. A subnet is deemed to be a subset of itself. A subnet is never a subset of another subnet if their address families differ.

Subnetishost returns non-zero if subnet `s` is in fact only a single host, and `0` otherwise.

Samesaid returns non-zero if SA IDs `a` and `b` are identical, and `0` otherwise.

Sameaddrtype returns non-zero if addresses `a` and `b` are of the same address family, and `0` otherwise.

Samesubnettype returns non-zero if subnets `a` and `b` are of the same address family, and `0` otherwise.

## SEE ALSO

inet 3, ipsec_initaddr 3

## HISTORY

Written for the FreeS/WAN project by Henry Spencer.