{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/ydah/redhound/blob/main/docs/json-schema.json",
  "title": "Redhound packet",
  "description": "One packet object emitted by Packet#to_h, NDJSON, or an element of the JSON output array. Nanosecond timestamps and lengths are integers; byte fields use hexadecimal strings; repeated fields use arrays.",
  "type": "object",
  "required": ["frame", "layers", "diagnostics"],
  "additionalProperties": false,
  "properties": {
    "frame": {
      "type": "object",
      "required": ["number", "time_epoch_ns", "time", "caplen", "len", "interface", "direction", "linktype"],
      "additionalProperties": false,
      "properties": {
        "number": { "type": "integer", "minimum": 1 },
        "time_epoch_ns": { "type": "integer" },
        "time": { "type": "string", "description": "UTC calendar time with nine fractional digits; years outside 0000..9999 use expanded signed/long year notation. time_epoch_ns preserves the exact instant.", "pattern": "^-?[0-9]{4,}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}\\.[0-9]{9}Z$" },
        "caplen": { "type": "integer", "minimum": 0 },
        "len": { "type": "integer", "minimum": 0 },
        "interface": { "type": ["string", "null"] },
        "direction": { "enum": ["in", "out", null] },
        "linktype": { "type": "integer", "minimum": 0, "maximum": 65535 }
      }
    },
    "layers": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["protocol", "offset", "length", "embedded", "fields"],
        "additionalProperties": false,
        "properties": {
          "protocol": { "type": "string" },
          "offset": { "type": "integer", "minimum": 0 },
          "length": { "type": "integer", "minimum": 0 },
          "embedded": { "type": "boolean" },
          "fields": { "type": "object", "additionalProperties": { "$ref": "#/$defs/fieldValue" } }
        }
      }
    },
    "diagnostics": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["layer", "severity", "code", "message", "field"],
        "additionalProperties": false,
        "properties": {
          "layer": { "type": "string" },
          "severity": { "enum": ["note", "warn", "warning", "error"] },
          "code": { "type": "string" },
          "message": { "type": "string" },
          "field": { "type": ["string", "null"] }
        }
      }
    }
  },
  "$defs": {
    "fieldValue": {
      "anyOf": [
        { "type": ["string", "number", "boolean", "null"] },
        { "type": "array", "items": { "$ref": "#/$defs/fieldValue" } }
      ]
    }
  }
}