zika 3.2.0

IP Tunneling over MQTT
Documentation 
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{
  "mqtt": {
    "options": {
      "// Optional MQTT Auth": "",
      "username": "",
      "password": "",

      "// Optional TLS": "",
      "ca_file": "ca.pem",
      "key_file": "key.pem",
      "cert_file": "cert.pem",

      "// Unit: seconds (int), Optonal: defaults shown": "",
      "keepalive_interval": 60,

      "// Setting to 0 disable topic alias": "",
      "topic_alias_max": 5
    },

    "// Config can be overwritten on broker level": "",
    "brokers": [
      { "host": "localhost", "port": 1883 },
      { "host": "localhost", "port": 1883, "options": { "keepalive_interval": 30 } }
    ]
  },

  "// NOTE: Tunnel ID and MQTT topic are prepended to all IP packets": "",
  "// Long IDs / topics will add significant overhead to traffic with many small packets": "",

  "server": {
    "// In bytes (Optional, default shown, must match client)": "",
    "id_length": 4,
    "topic": "zika/OjFcZWEAGy2E3Vkh",
    "bind_cidr": "172.20.0.0/24"
  },

  "client": {
    "bind_cidr": "172.20.0.0/24",
    "tunnels": [
      {
        "topic": "zika/OjFcZWEAGy2E3Vkh",
        "bind_addr": "172.20.0.2",
        "// In bytes (Optional, default shown, must match server)": "",
        "id_length": 4
      }
    ]
  }
}