mirror of
https://github.com/cwinfo/yggdrasil-go.git
synced 2024-11-22 16:30:27 +00:00
Allow updating AdminListen during runtime
This commit is contained in:
Neil Alexander
parent
7fae1c993a
commit
f96747181d
@ -76,6 +76,119 @@ func generateConfig(isAutoconf bool) *nodeConfig {
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return &cfg
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}
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func readConfig(useconf *bool, useconffile *string, normaliseconf *bool) *nodeConfig {
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// Use a configuration file. If -useconf, the configuration will be read
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// from stdin. If -useconffile, the configuration will be read from the
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// filesystem.
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var config []byte
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var err error
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if *useconffile != "" {
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// Read the file from the filesystem
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config, err = ioutil.ReadFile(*useconffile)
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} else {
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// Read the file from stdin.
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config, err = ioutil.ReadAll(os.Stdin)
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}
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if err != nil {
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panic(err)
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}
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// If there's a byte order mark - which Windows 10 is now incredibly fond of
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// throwing everywhere when it's converting things into UTF-16 for the hell
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// of it - remove it and decode back down into UTF-8. This is necessary
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// because hjson doesn't know what to do with UTF-16 and will panic
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if bytes.Compare(config[0:2], []byte{0xFF, 0xFE}) == 0 ||
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bytes.Compare(config[0:2], []byte{0xFE, 0xFF}) == 0 {
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utf := unicode.UTF16(unicode.BigEndian, unicode.UseBOM)
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decoder := utf.NewDecoder()
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config, err = decoder.Bytes(config)
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if err != nil {
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panic(err)
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}
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}
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// Generate a new configuration - this gives us a set of sane defaults -
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// then parse the configuration we loaded above on top of it. The effect
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// of this is that any configuration item that is missing from the provided
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// configuration will use a sane default.
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cfg := generateConfig(false)
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var dat map[string]interface{}
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if err := hjson.Unmarshal(config, &dat); err != nil {
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panic(err)
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}
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confJson, err := json.Marshal(dat)
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if err != nil {
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panic(err)
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}
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json.Unmarshal(confJson, &cfg)
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// For now we will do a little bit to help the user adjust their
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// configuration to match the new configuration format, as some of the key
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// names have changed recently.
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changes := map[string]string{
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"Multicast": "",
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"LinkLocal": "MulticastInterfaces",
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"BoxPub": "EncryptionPublicKey",
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"BoxPriv": "EncryptionPrivateKey",
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"SigPub": "SigningPublicKey",
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"SigPriv": "SigningPrivateKey",
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"AllowedBoxPubs": "AllowedEncryptionPublicKeys",
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}
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// Loop over the mappings aove and see if we have anything to fix.
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for from, to := range changes {
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if _, ok := dat[from]; ok {
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if to == "" {
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if !*normaliseconf {
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log.Println("Warning: Deprecated config option", from, "- please remove")
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}
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} else {
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if !*normaliseconf {
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log.Println("Warning: Deprecated config option", from, "- please rename to", to)
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}
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// If the configuration file doesn't already contain a line with the
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// new name then set it to the old value. This makes sure that we
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// don't overwrite something that was put there intentionally.
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if _, ok := dat[to]; !ok {
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dat[to] = dat[from]
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}
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}
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}
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}
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// Check to see if the peers are in a parsable format, if not then default
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// them to the TCP scheme
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if peers, ok := dat["Peers"].([]interface{}); ok {
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for index, peer := range peers {
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uri := peer.(string)
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if strings.HasPrefix(uri, "tcp://") || strings.HasPrefix(uri, "socks://") {
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continue
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}
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if strings.HasPrefix(uri, "tcp:") {
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uri = uri[4:]
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}
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(dat["Peers"].([]interface{}))[index] = "tcp://" + uri
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}
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}
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// Now do the same with the interface peers
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if interfacepeers, ok := dat["InterfacePeers"].(map[string]interface{}); ok {
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for intf, peers := range interfacepeers {
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for index, peer := range peers.([]interface{}) {
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uri := peer.(string)
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if strings.HasPrefix(uri, "tcp://") || strings.HasPrefix(uri, "socks://") {
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continue
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}
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if strings.HasPrefix(uri, "tcp:") {
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uri = uri[4:]
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}
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((dat["InterfacePeers"].(map[string]interface{}))[intf]).([]interface{})[index] = "tcp://" + uri
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}
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}
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}
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// Overlay our newly mapped configuration onto the autoconf node config that
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// we generated above.
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if err = mapstructure.Decode(dat, &cfg); err != nil {
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panic(err)
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}
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return cfg
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}
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// Generates a new configuration and returns it in HJSON format. This is used
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// with -genconf.
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func doGenconf(isjson bool) string {
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@ -106,6 +219,7 @@ func main() {
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flag.Parse()
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var cfg *nodeConfig
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var err error
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switch {
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case *version:
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fmt.Println("Build name:", yggdrasil.GetBuildName())
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@ -116,114 +230,8 @@ func main() {
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// port numbers, and will use an automatically selected TUN/TAP interface.
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cfg = generateConfig(true)
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case *useconffile != "" || *useconf:
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// Use a configuration file. If -useconf, the configuration will be read
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// from stdin. If -useconffile, the configuration will be read from the
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// filesystem.
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var config []byte
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var err error
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if *useconffile != "" {
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// Read the file from the filesystem
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config, err = ioutil.ReadFile(*useconffile)
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} else {
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// Read the file from stdin.
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config, err = ioutil.ReadAll(os.Stdin)
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}
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if err != nil {
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panic(err)
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}
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// If there's a byte order mark - which Windows 10 is now incredibly fond of
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// throwing everywhere when it's converting things into UTF-16 for the hell
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// of it - remove it and decode back down into UTF-8. This is necessary
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// because hjson doesn't know what to do with UTF-16 and will panic
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if bytes.Compare(config[0:2], []byte{0xFF, 0xFE}) == 0 ||
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bytes.Compare(config[0:2], []byte{0xFE, 0xFF}) == 0 {
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utf := unicode.UTF16(unicode.BigEndian, unicode.UseBOM)
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decoder := utf.NewDecoder()
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config, err = decoder.Bytes(config)
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if err != nil {
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panic(err)
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}
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}
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// Generate a new configuration - this gives us a set of sane defaults -
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// then parse the configuration we loaded above on top of it. The effect
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// of this is that any configuration item that is missing from the provided
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// configuration will use a sane default.
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cfg = generateConfig(false)
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var dat map[string]interface{}
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if err := hjson.Unmarshal(config, &dat); err != nil {
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panic(err)
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}
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confJson, err := json.Marshal(dat)
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if err != nil {
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panic(err)
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}
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json.Unmarshal(confJson, &cfg)
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// For now we will do a little bit to help the user adjust their
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// configuration to match the new configuration format, as some of the key
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// names have changed recently.
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changes := map[string]string{
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"Multicast": "",
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"LinkLocal": "MulticastInterfaces",
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"BoxPub": "EncryptionPublicKey",
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"BoxPriv": "EncryptionPrivateKey",
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"SigPub": "SigningPublicKey",
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"SigPriv": "SigningPrivateKey",
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"AllowedBoxPubs": "AllowedEncryptionPublicKeys",
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}
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// Loop over the mappings aove and see if we have anything to fix.
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for from, to := range changes {
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if _, ok := dat[from]; ok {
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if to == "" {
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if !*normaliseconf {
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log.Println("Warning: Deprecated config option", from, "- please remove")
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}
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} else {
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if !*normaliseconf {
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log.Println("Warning: Deprecated config option", from, "- please rename to", to)
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}
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// If the configuration file doesn't already contain a line with the
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// new name then set it to the old value. This makes sure that we
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// don't overwrite something that was put there intentionally.
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if _, ok := dat[to]; !ok {
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dat[to] = dat[from]
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}
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}
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}
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}
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// Check to see if the peers are in a parsable format, if not then default
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// them to the TCP scheme
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if peers, ok := dat["Peers"].([]interface{}); ok {
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for index, peer := range peers {
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uri := peer.(string)
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if strings.HasPrefix(uri, "tcp://") || strings.HasPrefix(uri, "socks://") {
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continue
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}
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if strings.HasPrefix(uri, "tcp:") {
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uri = uri[4:]
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}
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(dat["Peers"].([]interface{}))[index] = "tcp://" + uri
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}
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}
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// Now do the same with the interface peers
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if interfacepeers, ok := dat["InterfacePeers"].(map[string]interface{}); ok {
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for intf, peers := range interfacepeers {
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for index, peer := range peers.([]interface{}) {
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uri := peer.(string)
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if strings.HasPrefix(uri, "tcp://") || strings.HasPrefix(uri, "socks://") {
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continue
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}
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if strings.HasPrefix(uri, "tcp:") {
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uri = uri[4:]
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}
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((dat["InterfacePeers"].(map[string]interface{}))[intf]).([]interface{})[index] = "tcp://" + uri
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}
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}
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}
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// Overlay our newly mapped configuration onto the autoconf node config that
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// we generated above.
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if err = mapstructure.Decode(dat, &cfg); err != nil {
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panic(err)
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}
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// Read the configuration from either stdin or from the filesystem
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cfg = readConfig(useconf, useconffile, normaliseconf)
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// If the -normaliseconf option was specified then remarshal the above
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// configuration and print it back to stdout. This lets the user update
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// their configuration file with newly mapped names (like above) or to
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@ -327,7 +335,12 @@ func main() {
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for {
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select {
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case _ = <-r:
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n.core.UpdateConfig(cfg)
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if *useconffile != "" {
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cfg = readConfig(useconf, useconffile, normaliseconf)
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n.core.UpdateConfig(cfg)
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} else {
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logger.Println("Reloading config at runtime is only possible with -useconffile")
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}
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case _ = <-c:
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goto exit
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}
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@ -61,7 +61,9 @@ func (a *admin) init(c *Core) {
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case e := <-a.reconfigure:
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a.core.configMutex.RLock()
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if a.core.config.AdminListen != a.core.configOld.AdminListen {
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a.core.log.Println("AdminListen has changed!")
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a.listenaddr = a.core.config.AdminListen
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a.close()
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a.start()
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}
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a.core.configMutex.RUnlock()
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e <- nil
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