Getting some data but malformed

This is what the data shows up in the sentinal looking like:

2025/04/02 22:36:32 Error decoding message: Hello darkness my old friend::48656c6c6f206461726b6e657373206d79206f6c6420667269656e64aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
2025/04/02 22:36:32 INFO: Relay message received: Hello darkness my old friend

src/main.zig

@@ -2,6 +2,8 @@
 //! you are building an executable. If you are making a library, the convention
 //! is to delete this file and start with root.zig instead.
 
+const is_debug = builtin.mode == .Debug;
+
 const SaprusPacketType = enum(u16) {
     relay = 0x003C,
     file_transfer = 0x8888,
@@ -14,9 +16,9 @@ const SaprusHeaderFrame = struct {
     const Self = @This();
 
     fn toBytes(s: Self, allocator: Allocator) ![]u8 {
-        const buf = allocator.alloc(u8, 32 + s.payload.len);
-        std.mem.writeInt(u16, buf[0..2], s.msg_type, .big);
-        std.mem.writeInt(u16, buf[2..4], s.payload.len);
+        const buf = try allocator.alloc(u8, 32 + s.payload.len);
+        std.mem.writeInt(u16, buf[0..2], @intFromEnum(s.msg_type), .big);
+        std.mem.writeInt(u16, buf[2..4], @intCast(s.payload.len), .big);
         std.mem.copyForwards(u8, buf[4..], s.payload);
         return buf;
     }
@@ -29,27 +31,72 @@ const SaprusRelayMessage = struct {
     const Self = @This();
 
     fn toBytes(s: Self, allocator: Allocator) ![]u8 {
-        const buf = allocator.alloc(u8, 4 + s.payload.len);
-        std.mem.copyForwards(u8, buf[0..4], s.dest);
+        const buf = try allocator.alloc(u8, 4 + s.payload.len);
+        std.mem.copyForwards(u8, buf[0..4], &s.dest);
         std.mem.copyForwards(u8, buf[4..], s.payload);
         return buf;
     }
 };
 
 pub fn main() !void {
-    // Prints to stderr (it's a shortcut based on `std.io.getStdErr()`)
-    std.debug.print("All your {s} are belong to us.\n", .{"codebase"});
+    const DBA = std.heap.DebugAllocator(.{});
+    var dba: ?DBA = if (comptime is_debug) DBA.init else null;
+    defer if (dba) |*d| {
+        _ = d.deinit();
+    };
 
-    // stdout is for the actual output of your application, for example if you
-    // are implementing gzip, then only the compressed bytes should be sent to
-    // stdout, not any debugging messages.
-    const stdout_file = std.io.getStdOut().writer();
-    var bw = std.io.bufferedWriter(stdout_file);
-    const stdout = bw.writer();
+    var allocator = if (dba) |*d| d.allocator() else std.heap.smp_allocator;
 
-    try stdout.print("Run `zig build test` to run the tests.\n", .{});
+    const relay: SaprusRelayMessage = .{
+        .dest = [_]u8{ 255, 255, 255, 255 },
+        .payload = @ptrCast(@constCast("Hello darkness my old friend")),
+    };
+    const relay_bytes = try relay.toBytes(allocator);
+    defer allocator.free(relay_bytes);
+    const msg: SaprusHeaderFrame = .{
+        .msg_type = .relay,
+        .payload = relay_bytes,
+    };
+    const msg_bytes = try msg.toBytes(allocator);
+    defer allocator.free(msg_bytes);
 
-    try bw.flush(); // Don't forget to flush!
+    try network.init();
+    defer network.deinit();
+
+    var sock = try network.Socket.create(.ipv4, .udp);
+    defer sock.close();
+
+    try sock.setBroadcast(true);
+
+    // Bind to 0.0.0.0:0
+    const bind_addr = network.EndPoint{
+        .address = network.Address{ .ipv4 = network.Address.IPv4.any },
+        .port = 0,
+    };
+
+    const dest_addr = network.EndPoint{
+        .address = network.Address{ .ipv4 = network.Address.IPv4.broadcast },
+        .port = 8888,
+    };
+
+    try sock.bind(bind_addr);
+
+    // @breakpoint();
+    _ = try sock.sendTo(dest_addr, msg_bytes);
+
+    // // Prints to stderr (it's a shortcut based on `std.io.getStdErr()`)
+    // std.debug.print("All your {any} are belong to us.\n", .{msg});
+
+    // // stdout is for the actual output of your application, for example if you
+    // // are implementing gzip, then only the compressed bytes should be sent to
+    // // stdout, not any debugging messages.
+    // const stdout_file = std.io.getStdOut().writer();
+    // var bw = std.io.bufferedWriter(stdout_file);
+    // const stdout = bw.writer();
+
+    // try stdout.print("Run `zig build test` to run the tests.\n", .{});
+
+    // try bw.flush(); // Don't forget to flush!
 }
 
 test "simple test" {
@@ -70,5 +117,8 @@ test "fuzz example" {
     try std.testing.fuzz(Context{}, Context.testOne, .{});
 }
 
+const builtin = @import("builtin");
 const std = @import("std");
 const Allocator = std.mem.Allocator;
+
+const network = @import("network");