IPMaskFromPrefixLen builds IPMask from prefix length.

IPMaskPrefixLen returns the number of prefix `1` for specfic IPMask.

IPNetLess is less comparator for net.IPNet.

IPNetOverlapped checks whether a set of IPNet have any overlapped part.

SortedSetBuild builds sorted set.

SortedSetMerge merges two sorted set.

SortedSetSelectMerge merges two sorted set.

SortedSetSubstract removes elements from left set.

SortedSetEqualer defines Equal() method required by SortedSet helper API.

SortedSetInterface defines methods required by SortedSet helper API.

Errors contains a set of errors.

IPNetSet contains a sorted set of IPNet.