mirror of
https://github.com/yggdrasil-network/yggdrasil-go.git
synced 2025-04-29 06:35:07 +03:00
Simplify reconfiguration
This commit is contained in:
Neil Alexander
parent
764f9c8e11
commit
fc9a1c6c31
13 changed files with 64 additions and 141 deletions
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@ -20,7 +20,6 @@ import (
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type cryptokey struct {
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tun *TunAdapter
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enabled atomic.Value // bool
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reconfigure chan chan error
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ipv4remotes []cryptokey_route
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ipv6remotes []cryptokey_route
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ipv4cache map[address.Address]cryptokey_route
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@ -40,24 +39,11 @@ type cryptokey_route struct {
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// Initialise crypto-key routing. This must be done before any other CKR calls.
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func (c *cryptokey) init(tun *TunAdapter) {
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c.tun = tun
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c.reconfigure = make(chan chan error, 1)
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go func() {
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for {
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e := <-c.reconfigure
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e <- nil
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}
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}()
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c.tun.log.Debugln("Configuring CKR...")
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if err := c.configure(); err != nil {
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c.tun.log.Errorln("CKR configuration failed:", err)
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} else {
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c.tun.log.Debugln("CKR configured")
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}
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c.configure()
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}
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// Configure the CKR routes.
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func (c *cryptokey) configure() error {
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// Configure the CKR routes. This should only ever be ran by the TUN/TAP actor.
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func (c *cryptokey) configure() {
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current := c.tun.config.GetCurrent()
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// Set enabled/disabled state
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@ -72,14 +58,14 @@ func (c *cryptokey) configure() error {
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// Add IPv6 routes
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for ipv6, pubkey := range current.TunnelRouting.IPv6RemoteSubnets {
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if err := c.addRemoteSubnet(ipv6, pubkey); err != nil {
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return err
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c.tun.log.Errorln("Error adding CKR IPv6 remote subnet:", err)
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}
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}
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// Add IPv4 routes
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for ipv4, pubkey := range current.TunnelRouting.IPv4RemoteSubnets {
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if err := c.addRemoteSubnet(ipv4, pubkey); err != nil {
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return err
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c.tun.log.Errorln("Error adding CKR IPv4 remote subnet:", err)
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}
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}
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@ -93,7 +79,7 @@ func (c *cryptokey) configure() error {
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c.ipv6locals = make([]net.IPNet, 0)
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for _, source := range current.TunnelRouting.IPv6LocalSubnets {
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if err := c.addLocalSubnet(source); err != nil {
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return err
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c.tun.log.Errorln("Error adding CKR IPv6 local subnet:", err)
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}
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}
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@ -101,7 +87,7 @@ func (c *cryptokey) configure() error {
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c.ipv4locals = make([]net.IPNet, 0)
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for _, source := range current.TunnelRouting.IPv4LocalSubnets {
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if err := c.addLocalSubnet(source); err != nil {
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return err
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c.tun.log.Errorln("Error adding CKR IPv4 local subnet:", err)
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}
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}
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@ -110,8 +96,6 @@ func (c *cryptokey) configure() error {
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c.ipv4cache = make(map[address.Address]cryptokey_route, 0)
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c.ipv6cache = make(map[address.Address]cryptokey_route, 0)
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c.mutexcaches.Unlock()
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return nil
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}
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// Enable or disable crypto-key routing.
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@ -181,19 +165,19 @@ func (c *cryptokey) addLocalSubnet(cidr string) error {
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} else if prefixsize == net.IPv4len*8 {
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routingsources = &c.ipv4locals
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} else {
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return errors.New("Unexpected prefix size")
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return errors.New("unexpected prefix size")
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}
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// Check if we already have this CIDR
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for _, subnet := range *routingsources {
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if subnet.String() == ipnet.String() {
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return errors.New("Source subnet already configured")
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return errors.New("local subnet already configured")
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}
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}
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// Add the source subnet
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*routingsources = append(*routingsources, *ipnet)
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c.tun.log.Infoln("Added CKR source subnet", cidr)
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c.tun.log.Infoln("Added CKR local subnet", cidr)
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return nil
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}
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@ -226,7 +210,7 @@ func (c *cryptokey) addRemoteSubnet(cidr string, dest string) error {
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routingtable = &c.ipv4remotes
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routingcache = &c.ipv4cache
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} else {
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return errors.New("Unexpected prefix size")
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return errors.New("unexpected prefix size")
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}
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// Is the route an Yggdrasil destination?
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@ -235,19 +219,19 @@ func (c *cryptokey) addRemoteSubnet(cidr string, dest string) error {
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copy(addr[:], ipaddr)
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copy(snet[:], ipnet.IP)
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if addr.IsValid() || snet.IsValid() {
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return errors.New("Can't specify Yggdrasil destination as crypto-key route")
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return errors.New("can't specify Yggdrasil destination as crypto-key route")
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}
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// Do we already have a route for this subnet?
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for _, route := range *routingtable {
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if route.subnet.String() == ipnet.String() {
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return errors.New(fmt.Sprintf("Route already exists for %s", cidr))
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return fmt.Errorf("remote subnet already exists for %s", cidr)
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}
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}
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// Decode the public key
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if bpk, err := hex.DecodeString(dest); err != nil {
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return err
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} else if len(bpk) != crypto.BoxPubKeyLen {
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return errors.New(fmt.Sprintf("Incorrect key length for %s", dest))
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return fmt.Errorf("incorrect key length for %s", dest)
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} else {
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// Add the new crypto-key route
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var key crypto.BoxPubKey
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@ -270,7 +254,7 @@ func (c *cryptokey) addRemoteSubnet(cidr string, dest string) error {
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delete(*routingcache, k)
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}
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c.tun.log.Infoln("Added CKR destination subnet", cidr)
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c.tun.log.Infoln("Added CKR remote subnet", cidr)
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return nil
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}
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}
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@ -284,7 +268,7 @@ func (c *cryptokey) getPublicKeyForAddress(addr address.Address, addrlen int) (c
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// Check if the address is a valid Yggdrasil address - if so it
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// is exempt from all CKR checking
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if addr.IsValid() {
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return crypto.BoxPubKey{}, errors.New("Cannot look up CKR for Yggdrasil addresses")
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return crypto.BoxPubKey{}, errors.New("cannot look up CKR for Yggdrasil addresses")
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}
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// Build our references to the routing table and cache
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@ -297,7 +281,7 @@ func (c *cryptokey) getPublicKeyForAddress(addr address.Address, addrlen int) (c
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} else if addrlen == net.IPv4len {
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routingcache = &c.ipv4cache
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} else {
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return crypto.BoxPubKey{}, errors.New("Unexpected prefix size")
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return crypto.BoxPubKey{}, errors.New("unexpected prefix size")
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}
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// Check if there's a cache entry for this addr
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@ -317,7 +301,7 @@ func (c *cryptokey) getPublicKeyForAddress(addr address.Address, addrlen int) (c
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} else if addrlen == net.IPv4len {
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routingtable = &c.ipv4remotes
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} else {
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return crypto.BoxPubKey{}, errors.New("Unexpected prefix size")
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return crypto.BoxPubKey{}, errors.New("unexpected prefix size")
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}
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// No cache was found - start by converting the address into a net.IP
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@ -378,18 +362,18 @@ func (c *cryptokey) removeLocalSubnet(cidr string) error {
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} else if prefixsize == net.IPv4len*8 {
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routingsources = &c.ipv4locals
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} else {
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return errors.New("Unexpected prefix size")
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return errors.New("unexpected prefix size")
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}
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// Check if we already have this CIDR
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for idx, subnet := range *routingsources {
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if subnet.String() == ipnet.String() {
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*routingsources = append((*routingsources)[:idx], (*routingsources)[idx+1:]...)
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c.tun.log.Infoln("Removed CKR source subnet", cidr)
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c.tun.log.Infoln("Removed CKR local subnet", cidr)
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return nil
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}
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}
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return errors.New("Source subnet not found")
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return errors.New("local subnet not found")
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}
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// Removes a destination route for the given CIDR to be tunnelled to the node
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@ -421,7 +405,7 @@ func (c *cryptokey) removeRemoteSubnet(cidr string, dest string) error {
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routingtable = &c.ipv4remotes
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routingcache = &c.ipv4cache
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} else {
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return errors.New("Unexpected prefix size")
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return errors.New("unexpected prefix size")
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}
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// Decode the public key
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@ -429,7 +413,7 @@ func (c *cryptokey) removeRemoteSubnet(cidr string, dest string) error {
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if err != nil {
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return err
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} else if len(bpk) != crypto.BoxPubKeyLen {
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return errors.New(fmt.Sprintf("Incorrect key length for %s", dest))
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return fmt.Errorf("incorrect key length for %s", dest)
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}
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netStr := ipnet.String()
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@ -439,9 +423,9 @@ func (c *cryptokey) removeRemoteSubnet(cidr string, dest string) error {
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for k := range *routingcache {
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delete(*routingcache, k)
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}
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c.tun.log.Infof("Removed CKR destination subnet %s via %s\n", cidr, dest)
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c.tun.log.Infof("Removed CKR remote subnet %s via %s\n", cidr, dest)
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return nil
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}
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}
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return errors.New(fmt.Sprintf("Route does not exists for %s", cidr))
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return fmt.Errorf("route does not exists for %s", cidr)
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}
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@ -13,6 +13,7 @@ import (
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"errors"
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"fmt"
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"net"
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//"sync"
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"github.com/Arceliar/phony"
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@ -200,29 +201,11 @@ func (tun *TunAdapter) _stop() error {
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func (tun *TunAdapter) UpdateConfig(config *config.NodeConfig) {
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tun.log.Debugln("Reloading TUN/TAP configuration...")
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// Replace the active configuration with the supplied one
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tun.config.Replace(*config)
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errors := 0
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components := []chan chan error{
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tun.reconfigure,
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tun.ckr.reconfigure,
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}
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for _, component := range components {
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response := make(chan error)
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component <- response
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if err := <-response; err != nil {
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tun.log.Errorln(err)
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errors++
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}
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}
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if errors > 0 {
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tun.log.Warnln(errors, "TUN/TAP module(s) reported errors during configuration reload")
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} else {
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tun.log.Infoln("TUN/TAP configuration reloaded successfully")
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}
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// Notify children about the configuration change
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tun.Act(nil, tun.ckr.configure)
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}
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func (tun *TunAdapter) handler() error {
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