47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
package network
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import ipa "inet.af/netaddr"
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// IterateNetRange will ingest either a netaddr range or a netaddr prefix from the inet.af/netaddr package;
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// returning a channel that will stream all the individual netaddr IPs within the given range or prefix.
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// Alternatively, feed it a string in prefix or range format. (192.168.69.0/24) (192.168.69.0-192.168.69.254)
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// Will return nil value if input is invalid.
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func IterateNetRange(ips interface{}) chan *ipa.IP {
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var addrs ipa.IPRange
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switch ips.(type) {
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case string:
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strefix, prefixErr := ipa.ParseIPPrefix(ips.(string))
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strange, rangeErr := ipa.ParseIPRange(ips.(string))
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switch {
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case rangeErr == nil:
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addrs = strange
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case prefixErr == nil:
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addrs = strefix.Range()
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default:
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return nil
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}
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case ipa.IPRange:
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addrs = ips.(ipa.IPRange)
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case ipa.IPPrefix:
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addrs = ips.(ipa.IPPrefix).Range()
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default:
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return nil
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}
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ch := make(chan *ipa.IP)
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go func(ret chan *ipa.IP) {
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var head ipa.IP
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head = addrs.From()
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end := addrs.To()
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for head != end {
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if !head.IsUnspecified() {
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ret <- &head
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}
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head = head.Next()
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}
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close(ret)
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}(ch)
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return ch
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}
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