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43 lines
822 B
43 lines
822 B
package rings |
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import "net/netip" |
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// AddrFromU32 converts a 32bit value into an IPv4 |
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// address. |
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func AddrFromU32(v uint32) netip.Addr { |
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return AddrFrom4( |
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uint(v>>24), |
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uint(v>>16), |
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uint(v>>8), |
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uint(v), |
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) |
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} |
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// AddrFrom4 assembles an IPv4 address for 4 numbers. |
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// each number is truncated to 8-bits. |
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func AddrFrom4(a, b, c, d uint) netip.Addr { |
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return netip.AddrFrom4([4]byte{ |
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byte(a & 0xff), |
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byte(b & 0xff), |
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byte(c & 0xff), |
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byte(d & 0xff), |
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}) |
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} |
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// AddrToU32 converts a valid IPv4 address into it's |
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// 32bit numeric representation. |
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func AddrToU32(addr netip.Addr) (v uint32, ok bool) { |
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if addr.IsValid() { |
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if addr.Is4() || addr.Is4In6() { |
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a4 := addr.As4() |
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v = uint32(a4[0])<<24 + |
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uint32(a4[1])<<16 + |
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uint32(a4[2])<<8 + |
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uint32(a4[3]) |
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return v, true |
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} |
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} |
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return 0, false |
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}
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