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mirror of https://github.com/cwinfo/yggdrasil-go.git synced 2024-12-23 02:55:39 +00:00

Allow updating AdminListen during runtime

This commit is contained in:
Neil Alexander 2018-12-30 12:26:55 +00:00
parent 7fae1c993a
commit f96747181d
No known key found for this signature in database
GPG Key ID: A02A2019A2BB0944
2 changed files with 125 additions and 110 deletions

View File

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

View File

@ -61,7 +61,9 @@ func (a *admin) init(c *Core) {
case e := <-a.reconfigure:
a.core.configMutex.RLock()
if a.core.config.AdminListen != a.core.configOld.AdminListen {
a.core.log.Println("AdminListen has changed!")
a.listenaddr = a.core.config.AdminListen
a.close()
a.start()
}
a.core.configMutex.RUnlock()
e <- nil