Rewrite DiscordIpDiscoveryPacket

src/DSharpPlus.VoiceLink/DiscordIpDiscoveryPacket.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Buffers.Binary;
+using System.Text;
+
+namespace DSharpPlus.VoiceLink
+{
+    public readonly struct DiscordIpDiscoveryPacket
+    {
+        public ushort Type { get; init; }
+        public ushort Length { get; init; }
+        public uint Ssrc { get; init; }
+        public string Address { get; init; }
+        public ushort Port { get; init; }
+
+        public DiscordIpDiscoveryPacket(byte[] data)
+        {
+            Span<byte> dataSpan = data.AsSpan();
+            Type = BinaryPrimitives.ReadUInt16BigEndian(dataSpan[0..2]);
+            Length = BinaryPrimitives.ReadUInt16BigEndian(dataSpan[2..4]);
+            Ssrc = BinaryPrimitives.ReadUInt32BigEndian(dataSpan[4..8]);
+            Address = Encoding.UTF8.GetString(dataSpan[8..72].TrimEnd((byte)'\0'));
+            Port = BinaryPrimitives.ReadUInt16BigEndian(dataSpan[72..74]);
+        }
+
+        public DiscordIpDiscoveryPacket(ushort type, ushort length, uint ssrc, string address, ushort port)
+        {
+            Type = type;
+            Length = length;
+            Ssrc = ssrc;
+            Address = address;
+            Port = port;
+        }
+
+        public static implicit operator DiscordIpDiscoveryPacket(byte[] ipDiscoveryData) => new(ipDiscoveryData);
+        public static implicit operator byte[](DiscordIpDiscoveryPacket ipDiscovery)
+        {
+            byte[] data = new byte[74];
+
+            Span<byte> dataSpan = data.AsSpan();
+            BinaryPrimitives.WriteUInt16BigEndian(dataSpan[0..2], ipDiscovery.Type);
+            BinaryPrimitives.WriteUInt16BigEndian(dataSpan[2..4], ipDiscovery.Length);
+            BinaryPrimitives.WriteUInt32BigEndian(dataSpan[4..8], ipDiscovery.Ssrc);
+            Encoding.UTF8.TryGetBytes(ipDiscovery.Address, dataSpan[8..72], out _);
+            BinaryPrimitives.WriteUInt16BigEndian(dataSpan[72..74], ipDiscovery.Port);
+
+            return data;
+        }
+
+        public override string ToString() => $"Type: {Type}, Length: {Length}, Ssrc: {Ssrc}, Address: {Address}, Port: {Port}";
+    }
+}