src/main.zig

@@ -97,26 +97,45 @@ pub fn main(init: std.process.Init) !void {
         const linux_socket = std.os.linux.socket(AF.PACKET, SOCK.RAW, 0);
         const errno = std.os.linux.errno(linux_socket);
         if (errno != .SUCCESS) {
-            std.debug.log("Failed to open socket: {t}\n", .{errno});
+            std.debug.print("Failed to open socket: {t}\n", .{errno});
             return error.Error; // TODO: better error
         }
         break :blk linux_socket;
     };
     const socket_fd = blk: {
-        const socket_fd = std.os.linux.bind(linux_socket, @bitCast(std.os.linux.sockaddr.ll{
+        const socket_fd = std.os.linux.bind(@intCast(linux_socket), @bitCast(std.os.linux.sockaddr.ll{
-            .protocol = ,
+            // https://codeberg.org/jeffective/gatorcat/src/commit/1da40c85c2d063368e2e5c130e654cb32b6bff0e/src/module/nic.zig#L137
+            .protocol = std.mem.nativeToBig(u16, @as(u16, std.os.linux.ETH.P.ALL)),
             .ifindex = 1,
-            .hatype = ,
+            .hatype = 0,
-            .pkttype = ,
+            .pkttype = 0,
-            .halen = ,
+            .halen = 0,
             .addr = @splat(0),
-            }), @sizeOf(std.os.linux.sockaddr.ll));
+        }), @sizeOf(std.os.linux.sockaddr.ll));
-    };
-    const ip: std.Io.net.IpAddress = .{ .ip4 = .unspecified(0) };
-    const socket = try ip.bind(init.io, .{ .mode = .raw, .protocol = .raw });
-    defer socket.close(init.io);
 
-    try socket.send(init.io, &.{ .ip4 = try .parse("255.255.255.255", 8888) }, "foo");
+        const errno = std.os.linux.errno(socket_fd);
+
+        if (errno != .SUCCESS) {
+            std.debug.print("Failed to create link layer socket: {t}\n", .{errno});
+            return error.Error; // TODO: better error
+        }
+        break :blk socket_fd;
+    };
+
+    const EthIpUdp = struct {
+        // eth
+        dst_mac: [6]u8 = @splat(0xff),
+        src_mac: [6]u8,
+        eth_type: u16 = std.os.linux.ETH.P.IP,
+        // ip
+        ip_version: u4 = 4,
+    };
+
+    // const ip: std.Io.net.IpAddress = .{ .ip4 = .unspecified(0) };
+    // const socket = try ip.bind(init.io, .{ .mode = .rdm, .protocol = .raw });
+    // defer socket.close(init.io);
+
+    // try socket.send(init.io, &.{ .ip4 = .{ .bytes = @splat(255), .port = 8888 } }, "foo");
 
     // var sock_buffer: [1500]u8 = undefined;
     // var raw_socket_writer: RawSocketWriter = try .init("enp7s0", &sock_buffer); // /proc/net/dev
@@ -170,6 +189,16 @@ const SaprusClient = zaprus.Client;
 const SaprusMessage = zaprus.Message;
 const RawSocketWriter = zaprus.RawSocketWriter;
 
+// Import C headers for network constants and structs
+const c = @cImport({
+    @cInclude("sys/socket.h");
+    @cInclude("linux/if_packet.h");
+    @cInclude("net/ethernet.h");
+    @cInclude("sys/ioctl.h");
+    @cInclude("net/if.h");
+    @cInclude("arpa/inet.h");
+});
+
 const AF = std.os.linux.AF;
 const SOCK = std.os.linux.SOCK;
 // const NetWriter = zaprus.NetWriter;