mirror of
https://github.com/juanfont/headscale.git
synced 2024-12-20 19:09:07 +01:00
move matcher to separate file
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby
Juan Font
parent
56b63c6e10
commit
644be822d5
133
acls.go
133
acls.go
@ -15,7 +15,6 @@ import (
|
||||
"github.com/rs/zerolog/log"
|
||||
"github.com/samber/lo"
|
||||
"github.com/tailscale/hujson"
|
||||
"go4.org/netipx"
|
||||
"gopkg.in/yaml.v3"
|
||||
"tailscale.com/envknob"
|
||||
"tailscale.com/tailcfg"
|
||||
@ -808,135 +807,3 @@ func (pol *ACLPolicy) getIPsFromIPPrefix(
|
||||
|
||||
return lo.Uniq(val), nil
|
||||
}
|
||||
|
||||
// This is borrowed from, and updated to use IPSet
|
||||
// https://github.com/tailscale/tailscale/blob/71029cea2ddf82007b80f465b256d027eab0f02d/wgengine/filter/tailcfg.go#L97-L162
|
||||
// TODO(kradalby): contribute upstream and make public
|
||||
var (
|
||||
zeroIP4 = netip.AddrFrom4([4]byte{})
|
||||
zeroIP6 = netip.AddrFrom16([16]byte{})
|
||||
)
|
||||
|
||||
// parseIPSet parses arg as one:
|
||||
//
|
||||
// - an IP address (IPv4 or IPv6)
|
||||
// - the string "*" to match everything (both IPv4 & IPv6)
|
||||
// - a CIDR (e.g. "192.168.0.0/16")
|
||||
// - a range of two IPs, inclusive, separated by hyphen ("2eff::1-2eff::0800")
|
||||
//
|
||||
// bits, if non-nil, is the legacy SrcBits CIDR length to make a IP
|
||||
// address (without a slash) treated as a CIDR of *bits length.
|
||||
// nolint
|
||||
func parseIPSet(arg string, bits *int) (*netipx.IPSet, error) {
|
||||
var ipSet netipx.IPSetBuilder
|
||||
if arg == "*" {
|
||||
ipSet.AddPrefix(netip.PrefixFrom(zeroIP4, 0))
|
||||
ipSet.AddPrefix(netip.PrefixFrom(zeroIP6, 0))
|
||||
|
||||
return ipSet.IPSet()
|
||||
}
|
||||
if strings.Contains(arg, "/") {
|
||||
pfx, err := netip.ParsePrefix(arg)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if pfx != pfx.Masked() {
|
||||
return nil, fmt.Errorf("%v contains non-network bits set", pfx)
|
||||
}
|
||||
|
||||
ipSet.AddPrefix(pfx)
|
||||
|
||||
return ipSet.IPSet()
|
||||
}
|
||||
if strings.Count(arg, "-") == 1 {
|
||||
ip1s, ip2s, _ := strings.Cut(arg, "-")
|
||||
|
||||
ip1, err := netip.ParseAddr(ip1s)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
ip2, err := netip.ParseAddr(ip2s)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
r := netipx.IPRangeFrom(ip1, ip2)
|
||||
if !r.IsValid() {
|
||||
return nil, fmt.Errorf("invalid IP range %q", arg)
|
||||
}
|
||||
|
||||
for _, prefix := range r.Prefixes() {
|
||||
ipSet.AddPrefix(prefix)
|
||||
}
|
||||
|
||||
return ipSet.IPSet()
|
||||
}
|
||||
ip, err := netip.ParseAddr(arg)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("invalid IP address %q", arg)
|
||||
}
|
||||
bits8 := uint8(ip.BitLen())
|
||||
if bits != nil {
|
||||
if *bits < 0 || *bits > int(bits8) {
|
||||
return nil, fmt.Errorf("invalid CIDR size %d for IP %q", *bits, arg)
|
||||
}
|
||||
bits8 = uint8(*bits)
|
||||
}
|
||||
|
||||
ipSet.AddPrefix(netip.PrefixFrom(ip, int(bits8)))
|
||||
|
||||
return ipSet.IPSet()
|
||||
}
|
||||
|
||||
type Match struct {
|
||||
Srcs *netipx.IPSet
|
||||
Dests *netipx.IPSet
|
||||
}
|
||||
|
||||
func MatchFromFilterRule(rule tailcfg.FilterRule) Match {
|
||||
srcs := new(netipx.IPSetBuilder)
|
||||
dests := new(netipx.IPSetBuilder)
|
||||
|
||||
for _, srcIP := range rule.SrcIPs {
|
||||
set, _ := parseIPSet(srcIP, nil)
|
||||
|
||||
srcs.AddSet(set)
|
||||
}
|
||||
|
||||
for _, dest := range rule.DstPorts {
|
||||
set, _ := parseIPSet(dest.IP, nil)
|
||||
|
||||
dests.AddSet(set)
|
||||
}
|
||||
|
||||
srcsSet, _ := srcs.IPSet()
|
||||
destsSet, _ := dests.IPSet()
|
||||
|
||||
match := Match{
|
||||
Srcs: srcsSet,
|
||||
Dests: destsSet,
|
||||
}
|
||||
|
||||
return match
|
||||
}
|
||||
|
||||
func (m *Match) SrcsContainsIPs(ips []netip.Addr) bool {
|
||||
for _, ip := range ips {
|
||||
if m.Srcs.Contains(ip) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
func (m *Match) DestsContainsIP(ips []netip.Addr) bool {
|
||||
for _, ip := range ips {
|
||||
if m.Dests.Contains(ip) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
142
matcher.go
Normal file
142
matcher.go
Normal file
@ -0,0 +1,142 @@
|
||||
package headscale
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"net/netip"
|
||||
"strings"
|
||||
|
||||
"go4.org/netipx"
|
||||
"tailscale.com/tailcfg"
|
||||
)
|
||||
|
||||
// This is borrowed from, and updated to use IPSet
|
||||
// https://github.com/tailscale/tailscale/blob/71029cea2ddf82007b80f465b256d027eab0f02d/wgengine/filter/tailcfg.go#L97-L162
|
||||
// TODO(kradalby): contribute upstream and make public.
|
||||
var (
|
||||
zeroIP4 = netip.AddrFrom4([4]byte{})
|
||||
zeroIP6 = netip.AddrFrom16([16]byte{})
|
||||
)
|
||||
|
||||
// parseIPSet parses arg as one:
|
||||
//
|
||||
// - an IP address (IPv4 or IPv6)
|
||||
// - the string "*" to match everything (both IPv4 & IPv6)
|
||||
// - a CIDR (e.g. "192.168.0.0/16")
|
||||
// - a range of two IPs, inclusive, separated by hyphen ("2eff::1-2eff::0800")
|
||||
//
|
||||
// bits, if non-nil, is the legacy SrcBits CIDR length to make a IP
|
||||
// address (without a slash) treated as a CIDR of *bits length.
|
||||
// nolint
|
||||
func parseIPSet(arg string, bits *int) (*netipx.IPSet, error) {
|
||||
var ipSet netipx.IPSetBuilder
|
||||
if arg == "*" {
|
||||
ipSet.AddPrefix(netip.PrefixFrom(zeroIP4, 0))
|
||||
ipSet.AddPrefix(netip.PrefixFrom(zeroIP6, 0))
|
||||
|
||||
return ipSet.IPSet()
|
||||
}
|
||||
if strings.Contains(arg, "/") {
|
||||
pfx, err := netip.ParsePrefix(arg)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if pfx != pfx.Masked() {
|
||||
return nil, fmt.Errorf("%v contains non-network bits set", pfx)
|
||||
}
|
||||
|
||||
ipSet.AddPrefix(pfx)
|
||||
|
||||
return ipSet.IPSet()
|
||||
}
|
||||
if strings.Count(arg, "-") == 1 {
|
||||
ip1s, ip2s, _ := strings.Cut(arg, "-")
|
||||
|
||||
ip1, err := netip.ParseAddr(ip1s)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
ip2, err := netip.ParseAddr(ip2s)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
r := netipx.IPRangeFrom(ip1, ip2)
|
||||
if !r.IsValid() {
|
||||
return nil, fmt.Errorf("invalid IP range %q", arg)
|
||||
}
|
||||
|
||||
for _, prefix := range r.Prefixes() {
|
||||
ipSet.AddPrefix(prefix)
|
||||
}
|
||||
|
||||
return ipSet.IPSet()
|
||||
}
|
||||
ip, err := netip.ParseAddr(arg)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("invalid IP address %q", arg)
|
||||
}
|
||||
bits8 := uint8(ip.BitLen())
|
||||
if bits != nil {
|
||||
if *bits < 0 || *bits > int(bits8) {
|
||||
return nil, fmt.Errorf("invalid CIDR size %d for IP %q", *bits, arg)
|
||||
}
|
||||
bits8 = uint8(*bits)
|
||||
}
|
||||
|
||||
ipSet.AddPrefix(netip.PrefixFrom(ip, int(bits8)))
|
||||
|
||||
return ipSet.IPSet()
|
||||
}
|
||||
|
||||
type Match struct {
|
||||
Srcs *netipx.IPSet
|
||||
Dests *netipx.IPSet
|
||||
}
|
||||
|
||||
func MatchFromFilterRule(rule tailcfg.FilterRule) Match {
|
||||
srcs := new(netipx.IPSetBuilder)
|
||||
dests := new(netipx.IPSetBuilder)
|
||||
|
||||
for _, srcIP := range rule.SrcIPs {
|
||||
set, _ := parseIPSet(srcIP, nil)
|
||||
|
||||
srcs.AddSet(set)
|
||||
}
|
||||
|
||||
for _, dest := range rule.DstPorts {
|
||||
set, _ := parseIPSet(dest.IP, nil)
|
||||
|
||||
dests.AddSet(set)
|
||||
}
|
||||
|
||||
srcsSet, _ := srcs.IPSet()
|
||||
destsSet, _ := dests.IPSet()
|
||||
|
||||
match := Match{
|
||||
Srcs: srcsSet,
|
||||
Dests: destsSet,
|
||||
}
|
||||
|
||||
return match
|
||||
}
|
||||
|
||||
func (m *Match) SrcsContainsIPs(ips []netip.Addr) bool {
|
||||
for _, ip := range ips {
|
||||
if m.Srcs.Contains(ip) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
func (m *Match) DestsContainsIP(ips []netip.Addr) bool {
|
||||
for _, ip := range ips {
|
||||
if m.Dests.Contains(ip) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
119
matcher_test.go
Normal file
119
matcher_test.go
Normal file
@ -0,0 +1,119 @@
|
||||
package headscale
|
||||
|
||||
import (
|
||||
"net/netip"
|
||||
"reflect"
|
||||
"testing"
|
||||
|
||||
"go4.org/netipx"
|
||||
)
|
||||
|
||||
func Test_parseIPSet(t *testing.T) {
|
||||
set := func(ips []string, prefixes []string) *netipx.IPSet {
|
||||
var builder netipx.IPSetBuilder
|
||||
|
||||
for _, ip := range ips {
|
||||
builder.Add(netip.MustParseAddr(ip))
|
||||
}
|
||||
|
||||
for _, pre := range prefixes {
|
||||
builder.AddPrefix(netip.MustParsePrefix(pre))
|
||||
}
|
||||
|
||||
s, _ := builder.IPSet()
|
||||
|
||||
return s
|
||||
}
|
||||
|
||||
type args struct {
|
||||
arg string
|
||||
bits *int
|
||||
}
|
||||
tests := []struct {
|
||||
name string
|
||||
args args
|
||||
want *netipx.IPSet
|
||||
wantErr bool
|
||||
}{
|
||||
{
|
||||
name: "simple ip4",
|
||||
args: args{
|
||||
arg: "10.0.0.1",
|
||||
bits: nil,
|
||||
},
|
||||
want: set([]string{
|
||||
"10.0.0.1",
|
||||
}, []string{}),
|
||||
wantErr: false,
|
||||
},
|
||||
{
|
||||
name: "simple ip6",
|
||||
args: args{
|
||||
arg: "2001:db8:abcd:1234::2",
|
||||
bits: nil,
|
||||
},
|
||||
want: set([]string{
|
||||
"2001:db8:abcd:1234::2",
|
||||
}, []string{}),
|
||||
wantErr: false,
|
||||
},
|
||||
{
|
||||
name: "wildcard",
|
||||
args: args{
|
||||
arg: "*",
|
||||
bits: nil,
|
||||
},
|
||||
want: set([]string{}, []string{
|
||||
"0.0.0.0/0",
|
||||
"::/0",
|
||||
}),
|
||||
wantErr: false,
|
||||
},
|
||||
{
|
||||
name: "prefix4",
|
||||
args: args{
|
||||
arg: "192.168.0.0/16",
|
||||
bits: nil,
|
||||
},
|
||||
want: set([]string{}, []string{
|
||||
"192.168.0.0/16",
|
||||
}),
|
||||
wantErr: false,
|
||||
},
|
||||
{
|
||||
name: "prefix6",
|
||||
args: args{
|
||||
arg: "2001:db8:abcd:1234::/64",
|
||||
bits: nil,
|
||||
},
|
||||
want: set([]string{}, []string{
|
||||
"2001:db8:abcd:1234::/64",
|
||||
}),
|
||||
wantErr: false,
|
||||
},
|
||||
{
|
||||
name: "range4",
|
||||
args: args{
|
||||
arg: "192.168.0.0-192.168.255.255",
|
||||
bits: nil,
|
||||
},
|
||||
want: set([]string{}, []string{
|
||||
"192.168.0.0/16",
|
||||
}),
|
||||
wantErr: false,
|
||||
},
|
||||
}
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
got, err := parseIPSet(tt.args.arg, tt.args.bits)
|
||||
if (err != nil) != tt.wantErr {
|
||||
t.Errorf("parseIPSet() error = %v, wantErr %v", err, tt.wantErr)
|
||||
|
||||
return
|
||||
}
|
||||
if !reflect.DeepEqual(got, tt.want) {
|
||||
t.Errorf("parseIPSet() = %v, want %v", got, tt.want)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user