Add documentation for DnsRawEvent

Close: #964

CHANGELOG.md

@@ -56,6 +56,7 @@ Versioning](https://semver.org/spec/v2.0.0.html).
 - Documentation of the following GraphQL APIs is updated:
   - `connRawEvents`
   - `networkRawEvents`
+  - `dnsRawEvents`
   - `ftpRawEvents`
   - `httpRawEvents`
   - `tlsRawEvents`

src/graphql/client/schema/schema.graphql

@@ -389,25 +389,67 @@ type DnsEventEventEdge {
   cursor: String!
 }
 
+# Represents an event extracted from the DNS protocol.
 type DnsRawEvent {
+  # Start Time
   time: DateTime!
+
+  # Source IP address
   origAddr: String!
+
+  # Source Port Number
   origPort: Int!
+
+  # Destination IP Address
   respAddr: String!
+
+  # Destination Port Number
   respPort: Int!
+
+  # Protocol Number
+  #
+  # TCP is 6, and UDP is 17.
   proto: Int!
+
+  # End Time
+  #
+  # It is measured in nanoseconds.
   lastTime: StringNumberI64!
+
+  # Query
   query: String!
+
+  # Answer
   answer: [String!]!
+
+  # Transaction ID
   transId: Int!
+
+  # Round-Trip Time
   rtt: StringNumberI64!
+
+  # Query Class
   qclass: Int!
+
+  # Query Type
   qtype: Int!
+
+  # Response Code
   rcode: Int!
+
+  # Authoritative Answer Flag
   aaFlag: Boolean!
+
+  # Truncated Flag
   tcFlag: Boolean!
+
+  # Recursion Desired Flag
   rdFlag: Boolean!
+
+  # Recursion Available Flag
   raFlag: Boolean!
+
+  # Time to Live
   ttl: [Int!]!
 }
 

src/graphql/network.rs

@@ -186,28 +186,52 @@ struct ConnRawEvent {
     resp_l2_bytes: StringNumberU64,
 }
 
+/// Represents an event extracted from the DNS protocol.
 #[allow(clippy::struct_excessive_bools)]
 #[derive(SimpleObject, Debug, ConvertGraphQLEdgesNode)]
 #[graphql_client_type(names = [dns_raw_events::DnsRawEventsDnsRawEventsEdgesNode, network_raw_events::NetworkRawEventsNetworkRawEventsEdgesNodeOnDnsRawEvent])]
 struct DnsRawEvent {
+    /// Start Time
     time: DateTime<Utc>,
+    /// Source IP address
     orig_addr: String,
+    /// Source Port Number
     orig_port: u16,
+    /// Destination IP Address
     resp_addr: String,
+    /// Destination Port Number
     resp_port: u16,
+    /// Protocol Number
+    ///
+    /// TCP is 6, and UDP is 17.
     proto: u8,
+    /// End Time
+    ///
+    /// It is measured in nanoseconds.
     last_time: StringNumberI64,
+    /// Query
     query: String,
+    /// Answer
     answer: Vec<String>,
+    /// Transaction ID
     trans_id: u16,
+    /// Round-Trip Time
     rtt: StringNumberI64,
+    /// Query Class
     qclass: u16,
+    /// Query Type
     qtype: u16,
+    /// Response Code
     rcode: u16,
+    /// Authoritative Answer Flag
     aa_flag: bool,
+    /// Truncated Flag
     tc_flag: bool,
+    /// Recursion Desired Flag
     rd_flag: bool,
+    /// Recursion Available Flag
     ra_flag: bool,
+    /// Time to Live
     ttl: Vec<i32>,
 }