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@ -17,7 +17,7 @@ import (
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"github.com/coreos/go-iptables/iptables"
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"github.com/tailscale/wireguard-go/device"
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"github.com/tailscale/wireguard-go/tun"
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"github.com/tailscale/wireguard-go/wgcfg"
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"inet.af/netaddr"
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"tailscale.com/atomicfile"
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"tailscale.com/types/logger"
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)
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@ -51,9 +51,9 @@ const (
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type linuxRouter struct {
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logf func(fmt string, args ...interface{})
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tunname string
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addrs map[wgcfg.CIDR]bool
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routes map[wgcfg.CIDR]bool
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subnetRoutes map[wgcfg.CIDR]bool
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addrs map[netaddr.IPPrefix]bool
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routes map[netaddr.IPPrefix]bool
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subnetRoutes map[netaddr.IPPrefix]bool
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ipt4 *iptables.IPTables
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}
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@ -143,9 +143,9 @@ func (r *linuxRouter) Set(rs Settings) error {
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// cidrDiff calls add and del as needed to make the set of prefixes in
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// old and new match. Returns a map version of new, and the first
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// error encountered while reconfiguring, if any.
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cidrDiff := func(kind string, old map[wgcfg.CIDR]bool, new []wgcfg.CIDR, add, del func(wgcfg.CIDR) error) (map[wgcfg.CIDR]bool, error) {
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cidrDiff := func(kind string, old map[netaddr.IPPrefix]bool, new []netaddr.IPPrefix, add, del func(netaddr.IPPrefix) error) (map[netaddr.IPPrefix]bool, error) {
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var (
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ret = make(map[wgcfg.CIDR]bool, len(new))
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ret = make(map[netaddr.IPPrefix]bool, len(new))
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errq error
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)
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@ -212,7 +212,7 @@ const (
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resolvConf = "/etc/resolv.conf"
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)
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func (r *linuxRouter) replaceResolvConf(servers []wgcfg.IP, domains []string) error {
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func (r *linuxRouter) replaceResolvConf(servers []netaddr.IP, domains []string) error {
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if len(servers) == 0 {
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return r.restoreResolvConf()
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}
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@ -305,43 +305,43 @@ func (r *linuxRouter) restoreResolvConf() error {
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// addAddress adds an IP/mask to the tunnel interface. Fails if the
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// address is already assigned to the interface, or if the addition
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// fails.
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func (r *linuxRouter) addAddress(addr wgcfg.CIDR) error {
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func (r *linuxRouter) addAddress(addr netaddr.IPPrefix) error {
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return cmd("ip", "addr", "add", addr.String(), "dev", r.tunname)
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}
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// delAddress removes an IP/mask from the tunnel interface. Fails if
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// the address is not assigned to the interface, or if the removal
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// fails.
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func (r *linuxRouter) delAddress(addr wgcfg.CIDR) error {
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func (r *linuxRouter) delAddress(addr netaddr.IPPrefix) error {
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return cmd("ip", "addr", "del", addr.String(), "dev", r.tunname)
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}
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// normalizeCIDR returns cidr as an ip/mask string, with the host bits
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// of the IP address zeroed out.
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func normalizeCIDR(cidr wgcfg.CIDR) string {
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func normalizeCIDR(cidr netaddr.IPPrefix) string {
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ncidr := cidr.IPNet()
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nip := ncidr.IP.Mask(ncidr.Mask)
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return fmt.Sprintf("%s/%d", nip, cidr.Mask)
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return fmt.Sprintf("%s/%d", nip, cidr.Bits)
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}
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// addRoute adds a route for cidr, pointing to the tunnel
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// interface. Fails if the route already exists, or if adding the
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// route fails.
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func (r *linuxRouter) addRoute(cidr wgcfg.CIDR) error {
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func (r *linuxRouter) addRoute(cidr netaddr.IPPrefix) error {
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return cmd("ip", "route", "add", normalizeCIDR(cidr), "dev", r.tunname, "scope", "global")
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}
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// delRoute removes the route for cidr pointing to the tunnel
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// interface. Fails if the route doesn't exist, or if removing the
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// route fails.
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func (r *linuxRouter) delRoute(cidr wgcfg.CIDR) error {
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func (r *linuxRouter) delRoute(cidr netaddr.IPPrefix) error {
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return cmd("ip", "route", "del", normalizeCIDR(cidr), "dev", r.tunname, "scope", "global")
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}
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// addSubnetRule adds a netfilter rule that allows traffic to flow
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// from Tailscale to cidr. Fails if the rule already exists, or if
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// adding the route fails.
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func (r *linuxRouter) addSubnetRule(cidr wgcfg.CIDR) error {
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func (r *linuxRouter) addSubnetRule(cidr netaddr.IPPrefix) error {
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if err := r.ipt4.Insert("filter", "ts-forward", 1, "-i", r.tunname, "-d", normalizeCIDR(cidr), "-j", "MARK", "--set-mark", tailscaleSubnetRouteMark); err != nil {
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return err
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}
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@ -354,7 +354,7 @@ func (r *linuxRouter) addSubnetRule(cidr wgcfg.CIDR) error {
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// delSubnetRule deletes the netfilter subnet forwarding rule for
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// cidr. Fails if the rule doesn't exist, or if removing the rule
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// fails.
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func (r *linuxRouter) delSubnetRule(cidr wgcfg.CIDR) error {
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func (r *linuxRouter) delSubnetRule(cidr netaddr.IPPrefix) error {
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if err := r.ipt4.Delete("filter", "ts-forward", "-i", r.tunname, "-d", normalizeCIDR(cidr), "-j", "MARK", "--set-mark", tailscaleSubnetRouteMark); err != nil {
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return err
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}
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David Anderson
4 years ago
committed by