From 448e900004053012e63078682e34b48799050794 Mon Sep 17 00:00:00 2001
From: Robby Zambito <contact@robbyzambito.me>
Date: Fri, 4 Apr 2025 22:09:06 -0400
Subject: Break relay into a specific program

---
 src/saprus_relay.zig | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 src/saprus_relay.zig

(limited to 'src/saprus_relay.zig')

diff --git a/src/saprus_relay.zig b/src/saprus_relay.zig
new file mode 100644
index 0000000..0df66e9
--- /dev/null
+++ b/src/saprus_relay.zig
@@ -0,0 +1,71 @@
+const is_debug = builtin.mode == .Debug;
+
+/// This creates a debug allocator that can only be referenced in debug mode.
+/// You should check for is_debug around every reference to dba.
+var dba: DebugAllocator =
+    if (is_debug)
+        DebugAllocator.init
+    else
+        @compileError("Should not use debug allocator in release mode");
+
+pub fn main() !void {
+    defer if (is_debug) {
+        _ = dba.deinit();
+    };
+
+    var gpa = if (is_debug) dba.allocator() else std.heap.smp_allocator;
+
+    const args = try std.process.argsAlloc(gpa);
+    defer std.process.argsFree(gpa, args);
+
+    var message = ArrayList(u8).init(gpa);
+    defer message.deinit();
+
+    for (args[1..], 0..) |arg, i| {
+        try message.appendSlice(arg);
+        if (i < args.len - 1)
+            try message.append(' ');
+    }
+
+    const msg = SaprusMessage{
+        .relay = .{
+            .header = .{ .dest = .{ 255, 255, 255, 255 } },
+            .payload = if (message.items.len > 0) message.items else "Hello darkness my old friend",
+        },
+    };
+
+    const msg_bytes = try msg.toBytes(gpa);
+    defer gpa.free(msg_bytes);
+
+    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);
+
+    _ = try sock.sendTo(dest_addr, msg_bytes);
+}
+
+const builtin = @import("builtin");
+const std = @import("std");
+const DebugAllocator = std.heap.DebugAllocator(.{});
+const ArrayList = std.ArrayList;
+
+const network = @import("network");
+
+const SaprusMessage = @import("./saprus_message.zig").SaprusMessage;
-- 
cgit