amery
dd22c8f72a
Ring zero corresponds to the backbone that connects all zones. Signed-off-by: Alejandro Mery <amery@jpi.io>
41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
package rings
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import "net/netip"
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// RingZeroPrefix represents the backbone that connects gateways
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// of the different Ring 1 networks.
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//
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// The ring 0 network corresponds to what would be ring 2 for region_id 0.
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// 10.0.0.0-10.0.255.255
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func RingZeroPrefix(region RegionID, zone ZoneID) (cidr netip.Prefix, err error) {
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switch {
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case !region.Valid():
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err = ErrOutOfRange(region, "region")
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case !zone.Valid():
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err = ErrOutOfRange(zone, "zone")
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default:
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addr := AddrFrom4(10, 0, uint(region)<<4+uint(zone), 0)
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cidr = netip.PrefixFrom(addr, RingZeroBits)
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}
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return cidr, err
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}
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// RingZeroAddress returns a Ring 0 address for a particular node.
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//
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// A ring 0 address looks like 10.0.(region_id << 4 + zone_id).(node_id)/20
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func RingZeroAddress(region RegionID, zone ZoneID, node NodeID) (addr netip.Addr, err error) {
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switch {
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case !region.Valid():
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err = ErrOutOfRange(region, "region")
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case !zone.Valid():
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err = ErrOutOfRange(zone, "zone")
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case !node.ValidZero():
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err = ErrOutOfRange(node, "node")
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default:
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addr = AddrFrom4(10, 0, uint(region)<<4+uint(zone), uint(node))
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}
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return addr, err
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}
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