IPv6 broken?

[ThatMishakov]

Nemisys API does not seem to be able to authenticate when connecting through IPv6. IP address of Nemisis server is fdff:ff02:: and IP of Nukkit is fdff:ff90::.
I have also tried runing Nukkit locally and while localhost in SynapseAPI config.yaml worked fine, ::1 didn't work either. 172.0.0.1 did not connect at all.

Warning from Nukkit:
21:51:19 [WARN ] Synapse Client has connected to fdff:ff02:0:0:0:0:0:0:10305 21:51:19 [WARN ] [SynapseAPI] Connecting fdff:ff02::0:10305 21:51:19 [WARN ] SynapseEntry<fdff:ff02::0:10305> Async Thread is overloading! TPS: 14.099999999999998 tickUseTime: 71
(and no Login successfull from SynapseAPI)

Errors from Nemisys:
21:51:19 [ALERT] java.lang.NumberFormatException: For input string: "ff90" at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) at java.base/java.lang.Integer.parseInt(Integer.java:652) at java.base/java.lang.Integer.parseInt(Integer.java:770) at org.itxtech.nemisys.network.SynapseInterface.openClients(SynapseInterface.java:74) at org.itxtech.nemisys.network.SynapseInterface.process(SynapseInterface.java:102) at org.itxtech.nemisys.Server.tick(Server.java:462) at org.itxtech.nemisys.Server.tickProcessor(Server.java:429) at org.itxtech.nemisys.Server.start(Server.java:409) at org.itxtech.nemisys.Server.<init>(Server.java:205) at org.itxtech.nemisys.Nemisys.main(Nemisys.java:53)
(and no client connected successfully)

(When I had ::1 insted of localhost, there were no errors in Nemisys.)

Nemisys server.properties:
#Properties Config file #2020-01-18 09:51:17 motd=Nemisys Proxy server-ip=:: server-port=19132 synapse-ip=:: synapse-port=10305 password=G3z6nWq8cRkFak1o lang=eng async-workers=auto enable-profiling=off profile-report-trigger=20 max-players=20 plus-one-max-count=off dynamic-player-count=off players-per-thread=50 enable-query=on enable-rcon=off rcon.password=zYjUxMzAwM debug=1 enable-synapse-client=off display-stats-in-title=on

SynapseAPI config.yml:
`#Synapse API for Nukkit: config
disable-rak: false
enable: true

entries:

• server-ip: fdff:ff02::0
  server-port: 10305
  isMainServer: true
  isLobbyServer: true
  transferOnShutdown: true
  password: G3z6nWq8cRkFak1o
  description: Synapse Nukkit Server
  autoConnect: true`

Also, when I didn't have 0 at the end of fdff:ff02::, SynapseAPI would not work at all:
`22:17:07 [INFO ] Enabling SynapseAPI v2.0.0
22:17:07 [ERROR] Throwing
java.lang.RuntimeException: mapping values are not allowed here
in 'string', line 6, column 26:
- server-ip: fdff:ff02::
^

    at cn.nukkit.plugin.PluginManager.enablePlugin(PluginManager.java:443) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.Server.enablePlugin(Server.java:735) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.Server.enablePlugins(Server.java:724) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.Server.<init>(Server.java:485) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.Nukkit.main(Nukkit.java:112) ~[nukkit-1.0-SNAPSHOT.jar:?]

Caused by: org.yaml.snakeyaml.scanner.ScannerException: mapping values are not allowed here
in 'string', line 6, column 26:
- server-ip: fdff:ff02::
^

    at org.yaml.snakeyaml.scanner.ScannerImpl.fetchValue(ScannerImpl.java:871) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:360) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:226) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingKey.produce(ParserImpl.java:558) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:143) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:224) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:155) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.composer.Composer.composeSequenceNode(Composer.java:199) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:153) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:229) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:155) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.composer.Composer.composeDocument(Composer.java:122) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:105) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:120) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:450) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.yaml.snakeyaml.Yaml.loadAs(Yaml.java:427) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.utils.Config.parseContent(Config.java:554) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.utils.Config.load(Config.java:160) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.utils.Config.<init>(Config.java:98) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.utils.Config.<init>(Config.java:85) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.utils.Config.<init>(Config.java:81) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.plugin.PluginBase.reloadConfig(PluginBase.java:239) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.plugin.PluginBase.getConfig(PluginBase.java:218) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at org.itxtech.synapseapi.SynapseAPI.loadEntries(SynapseAPI.java:94) ~[?:?]
    at org.itxtech.synapseapi.SynapseAPI.onEnable(SynapseAPI.java:49) ~[?:?]
    at cn.nukkit.plugin.PluginBase.setEnabled(PluginBase.java:89) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.plugin.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:117) ~[nukkit-1.0-SNAPSHOT.jar:?]
    at cn.nukkit.plugin.PluginManager.enablePlugin(PluginManager.java:439) ~[nukkit-1.0-SNAPSHOT.jar:?]
    ... 4 more

22:17:07 [INFO ] Disabling SynapseAPI v2.0.0`