42 lines
655 B
Go
42 lines
655 B
Go
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package iplist
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import (
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"bufio"
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"io"
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"net"
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)
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func ParseCIDRListReader(r io.Reader) (ret []Range, err error) {
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s := bufio.NewScanner(r)
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for s.Scan() {
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err = func() (err error) {
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_, in, err := net.ParseCIDR(s.Text())
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if err != nil {
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return
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}
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ret = append(ret, Range{
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First: in.IP,
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Last: IPNetLast(in),
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})
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return
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}()
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if err != nil {
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return
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}
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}
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return
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}
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// Returns the last, inclusive IP in a net.IPNet.
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func IPNetLast(in *net.IPNet) (last net.IP) {
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n := len(in.IP)
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if n != len(in.Mask) {
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panic("wat")
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}
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last = make(net.IP, n)
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for i := 0; i < n; i++ {
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last[i] = in.IP[i] | ^in.Mask[i]
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}
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return
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}
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