Move sendRelay logic to Saprus struct

src/saprus.zig

@@ -0,0 +1,43 @@
+pub fn init() !void {
+    try network.init();
+}
+
+pub fn deinit() void {
+    network.deinit();
+}
+
+pub fn sendRelay(payload: []const u8, allocator: std.mem.Allocator) !void {
+    const msg = SaprusMessage{
+        .relay = .{
+            .header = .{ .dest = .{ 255, 255, 255, 255 } },
+            .payload = payload,
+        },
+    };
+
+    const msg_bytes = try msg.toBytes(allocator);
+    defer allocator.free(msg_bytes);
+
+    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 SaprusMessage = @import("./saprus_message.zig").SaprusMessage;
+const std = @import("std");
+const network = @import("network");

src/saprus_message.zig

@@ -39,8 +39,8 @@ pub const SaprusMessage = union(SaprusPacketType) {
     };
     pub const Connection = struct {
         pub const Header = packed struct {
-            src_port: u16,
+            src_port: u16, // random number > 1024
-            dest_port: u16,
+            dest_port: u16, // random number > 1024
             seq_num: u32 = 0,
             msg_id: u32 = 0,
             reserved: u8 = 0,

src/saprus_relay.zig

@@ -13,7 +13,7 @@ pub fn main() !void {
         _ = dba.deinit();
     };
 
-    var gpa = if (is_debug) dba.allocator() else std.heap.smp_allocator;
+    const gpa = if (is_debug) dba.allocator() else std.heap.smp_allocator;
 
     const args = try std.process.argsAlloc(gpa);
     defer std.process.argsFree(gpa, args);
@@ -27,38 +27,10 @@ pub fn main() !void {
             try message.append(' ');
     }
 
-    const msg = SaprusMessage{
+    try Saprus.init();
-        .relay = .{
+    defer Saprus.deinit();
-            .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);
+    try Saprus.sendRelay(if (message.items.len > 0) message.items else "Hello darkness my old friend", 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");
@@ -66,6 +38,4 @@ const std = @import("std");
 const DebugAllocator = std.heap.DebugAllocator(.{});
 const ArrayList = std.ArrayList;
 
-const network = @import("network");
+const Saprus = @import("./saprus.zig");
-
-const SaprusMessage = @import("./saprus_message.zig").SaprusMessage;