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// FIXME(thaJeztah): remove once we are a module; the go:build directive prevents go from downgrading language version to go1.16:
//go:build go1.22
// Package ipamutils provides utility functions for ipam management
package ipamutils
import (
"net/netip"
"slices"
)
var (
localScopeDefaultNetworks = []*NetworkToSplit{
{netip.MustParsePrefix("172.17.0.0/16"), 16},
{netip.MustParsePrefix("172.18.0.0/16"), 16},
{netip.MustParsePrefix("172.19.0.0/16"), 16},
{netip.MustParsePrefix("172.20.0.0/14"), 16},
{netip.MustParsePrefix("172.24.0.0/14"), 16},
{netip.MustParsePrefix("172.28.0.0/14"), 16},
{netip.MustParsePrefix("192.168.0.0/16"), 20},
}
globalScopeDefaultNetworks = []*NetworkToSplit{
{netip.MustParsePrefix("10.0.0.0/8"), 24},
}
)
// NetworkToSplit represent a network that has to be split in chunks with mask length Size.
// Each subnet in the set is derived from the Base pool. Base is to be passed
// in CIDR format.
// Example: a Base "10.10.0.0/16 with Size 24 will define the set of 256
// 10.10.[0-255].0/24 address pools
type NetworkToSplit struct {
Base netip.Prefix `json:"base"`
Size int `json:"size"`
}
// FirstPrefix returns the first prefix available in NetworkToSplit.
func (n NetworkToSplit) FirstPrefix() netip.Prefix {
return netip.PrefixFrom(n.Base.Addr(), n.Size)
}
// Overlaps is a util function checking whether 'p' overlaps with 'n'.
func (n NetworkToSplit) Overlaps(p netip.Prefix) bool {
return n.Base.Overlaps(p)
}
// GetGlobalScopeDefaultNetworks returns a copy of the global-scope network list.
func GetGlobalScopeDefaultNetworks() []*NetworkToSplit {
return slices.Clone(globalScopeDefaultNetworks)
}
// GetLocalScopeDefaultNetworks returns a copy of the default local-scope network list.
func GetLocalScopeDefaultNetworks() []*NetworkToSplit {
return slices.Clone(localScopeDefaultNetworks)
}
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