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package addrset
import (
"net/netip"
"testing"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func TestIPv4Pool(t *testing.T) {
var (
// It shouldn't matter that host bits are set in the pool Prefix.
subnet = netip.MustParsePrefix("10.20.30.40/16")
as = New(subnet)
addr netip.Addr
err error
)
assert.Check(t, is.Len(as.bitmaps, 0))
// Add the first and last addresses in the range.
// Expect a single bitmap of 65536 bits, with two bits set.
err = as.Add(netip.MustParseAddr("10.20.0.0"))
assert.Assert(t, err)
err = as.Add(netip.MustParseAddr("10.20.255.255"))
assert.Assert(t, err)
assert.Check(t, is.Len(as.bitmaps, 1))
bm := as.bitmaps[subnet.Masked()]
assert.Check(t, is.Equal(bm.Bits(), uint64(65536)))
assert.Check(t, is.Equal(bm.Unselected(), uint64(65534)))
// Add an address that's already present. Expect an error.
err = as.Add(netip.MustParseAddr("10.20.255.255"))
assert.Check(t, is.ErrorIs(err, ErrAllocated))
// Remove an address that isn't in the set. Expect no error.
err = as.Remove(netip.MustParseAddr("10.20.30.40"))
assert.Check(t, err)
// Remove all addresses, expect to end up with no bitmap.
err = as.Remove(netip.MustParseAddr("10.20.0.0"))
assert.Check(t, err)
err = as.Remove(netip.MustParseAddr("10.20.255.255"))
assert.Check(t, err)
assert.Check(t, is.Len(as.bitmaps, 0))
// Remove an address that isn't in the set (now there's no bitmap). Expect no error.
err = as.Remove(netip.MustParseAddr("10.20.30.40"))
assert.Check(t, err)
// Add any two addresses to the set, with serial=true. Expect the first two addresses.
addr, err = as.AddAny(true)
assert.Check(t, err)
assert.Check(t, is.Equal(addr, netip.MustParseAddr("10.20.0.0")))
addr, err = as.AddAny(true)
assert.Check(t, err)
assert.Check(t, is.Equal(addr, netip.MustParseAddr("10.20.0.1")))
// Add any address in a range. It shouldn't matter that host bits are set in the
// range. Expect the first address in that range.
addr, err = as.AddAnyInRange(netip.MustParsePrefix("10.20.30.40/24"), true)
assert.Check(t, err)
assert.Check(t, is.Equal(addr, netip.MustParseAddr("10.20.30.0")))
}
func TestIPv6Pool(t *testing.T) {
var (
subnet = netip.MustParsePrefix("fddd::dddd/56")
as = New(subnet)
addr netip.Addr
err error
)
assert.Check(t, is.Len(as.bitmaps, 0))
// Add the first and last addresses in the range.
// Expect two bitmaps of 1<<maxBitsPerBitmap bits, with one bit set in each.
err = as.Add(netip.MustParseAddr("fddd::"))
assert.Assert(t, err)
err = as.Add(netip.MustParseAddr("fddd::ff:ffff:ffff:ffff:ffff"))
assert.Assert(t, err)
assert.Check(t, is.Len(as.bitmaps, 2))
for _, bm := range as.bitmaps {
assert.Check(t, is.Equal(bm.Bits(), uint64(1)<<maxBitsPerBitmap))
assert.Check(t, is.Equal(bm.Unselected(), (uint64(1)<<maxBitsPerBitmap)-1))
}
// Add an address that's already present in the "upper" bitmap. Expect an error.
err = as.Add(netip.MustParseAddr("fddd::ff:ffff:ffff:ffff:ffff"))
assert.Check(t, is.ErrorIs(err, ErrAllocated))
// Remove an address that isn't in the set. Expect no error.
err = as.Remove(netip.MustParseAddr("fddd::f:0:0:0:0"))
assert.Check(t, err)
// Remove all addresses, expect to end up with no bitmap.
err = as.Remove(netip.MustParseAddr("fddd::"))
assert.Check(t, err)
err = as.Remove(netip.MustParseAddr("fddd::ff:ffff:ffff:ffff:ffff"))
assert.Check(t, err)
assert.Check(t, is.Len(as.bitmaps, 0))
// Remove an address that isn't in the set (now there's no bitmap). Expect no error.
err = as.Remove(netip.MustParseAddr("fddd::f:0:0:0:0"))
assert.Check(t, err)
// Add any two addresses to the set, with serial=true. Expect the first two addresses.
addr, err = as.AddAny(true)
assert.Check(t, err)
assert.Check(t, is.Equal(addr, netip.MustParseAddr("fddd::0")))
addr, err = as.AddAny(true)
assert.Check(t, err)
assert.Check(t, is.Equal(addr, netip.MustParseAddr("fddd::1")))
// Add any address in a range, somewhere in the middle of the pool. Expect the first address in that range.
addr, err = as.AddAnyInRange(netip.MustParsePrefix("fddd:0:0:f0::/60"), true)
assert.Check(t, err)
assert.Check(t, is.Equal(addr, netip.MustParseAddr("fddd:0:0:f0::")))
}
func Test64BitIPv6Range(t *testing.T) {
as := New(netip.MustParsePrefix("fd75:7f12:d221:7b32::/64"))
addr := netip.MustParseAddr("fd75:7f12:d221:7b32:94b0:97ff:fefe:52da")
err := as.Add(addr)
assert.Check(t, err)
err = as.Add(addr)
assert.Check(t, is.ErrorIs(err, ErrAllocated))
assert.Check(t, is.Error(err, "setting bit 1490858602410169050 for fd75:7f12:d221:7b32:94b0:97ff:fefe:52da in pool 'fd75:7f12:d221:7b32::/64': address already allocated"))
err = as.Remove(addr)
assert.Check(t, err)
err = as.Add(addr)
assert.Check(t, err)
}
func Test32BitIPv6Range(t *testing.T) {
as := New(netip.MustParsePrefix("fd75:7f12:d221:7b32::/96"))
addr := netip.MustParseAddr("fd75:7f12:d221:7b32::fefe:52da")
err := as.Add(addr)
assert.Check(t, err)
err = as.Add(addr)
assert.Check(t, is.ErrorIs(err, ErrAllocated))
assert.Check(t, is.Error(err, "setting bit 4278080218 for fd75:7f12:d221:7b32::fefe:52da in pool 'fd75:7f12:d221:7b32::/96': address already allocated"))
err = as.Remove(addr)
assert.Check(t, err)
err = as.Add(addr)
assert.Check(t, err)
}
func TestFullPool(t *testing.T) {
var (
subnet = netip.MustParsePrefix("10.20.30.0/24")
as = New(subnet)
err error
)
for range 256 {
_, err = as.AddAny(true)
assert.Check(t, err)
}
_, err = as.AddAny(true)
assert.Check(t, is.ErrorIs(err, ErrNotAvailable))
assert.Check(t, is.Error(err, "add-any to '10.20.30.0': address not available"))
}
func TestNotInPool(t *testing.T) {
var (
subnet = netip.MustParsePrefix("10.20.30.40/16")
as = New(subnet)
addr netip.Addr
err error
)
// Address not in pool.
err = as.Add(netip.MustParseAddr("10.21.0.0"))
assert.Check(t, is.Error(err, "cannot add 10.21.0.0 to '10.20.0.0/16'"))
// Range bigger than pool.
addr, err = as.AddAnyInRange(netip.MustParsePrefix("10.20.0.0/15"), true)
assert.Check(t, is.Error(err, "add-any, range '10.20.0.0/15' is not in subnet '10.20.0.0/16'"))
assert.Check(t, is.Equal(addr, netip.Addr{}))
// Range outside pool.
addr, err = as.AddAnyInRange(netip.MustParsePrefix("10.21.0.0/24"), true)
assert.Check(t, is.Error(err, "add-any, range '10.21.0.0/24' is not in subnet '10.20.0.0/16'"))
assert.Check(t, is.Equal(addr, netip.Addr{}))
}
func TestInvalidPool(t *testing.T) {
var (
as = New(netip.Prefix{})
addr netip.Addr
err error
)
err = as.Add(netip.IPv6Loopback())
assert.Check(t, is.Error(err, "cannot add ::1 to 'invalid Prefix'"))
addr, err = as.AddAny(false)
assert.Check(t, is.Error(err, "no bitmap to add-any to 'invalid IP': negative Prefix bits"))
assert.Check(t, is.Equal(addr, netip.Addr{}))
addr, err = as.AddAnyInRange(netip.Prefix{}, false)
assert.Check(t, is.Error(err, "add-any, range 'invalid Prefix' is not in subnet 'invalid Prefix'"))
assert.Check(t, is.Equal(addr, netip.Addr{}))
addr, err = as.AddAnyInRange(netip.MustParsePrefix("10.20.30.0/24"), false)
assert.Check(t, is.Error(err, "add-any, range '10.20.30.0/24' is not in subnet 'invalid Prefix'"))
assert.Check(t, is.Equal(addr, netip.Addr{}))
err = as.Remove(netip.MustParseAddr("10.20.30.0"))
assert.Check(t, is.Error(err, "10.20.30.0 cannot be removed from 'invalid Prefix'"))
}
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