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// Copyright 2026 Robby Zambito
//
// This file is part of zaprus.
//
// Zaprus is free software: you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
//
// Zaprus is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
// A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with
// Zaprus. If not, see <https://www.gnu.org/licenses/>.
socket: RawSocket,
headers: EthIpUdp,
connection: SaprusMessage,
const Connection = @This();
pub fn init(socket: RawSocket, headers: EthIpUdp, connection: SaprusMessage) Connection {
return .{
.socket = socket,
.headers = headers,
.connection = connection,
};
}
pub fn next(self: Connection, io: Io, buf: []u8) ![]const u8 {
_ = io;
log.debug("Awaiting connection message", .{});
const res = try self.socket.receive(buf);
log.debug("Received {} byte connection message", .{res.len});
const msg: SaprusMessage = try .parse(res[42..]);
const connection_res = msg.connection;
log.debug("Payload was {s}", .{connection_res.payload});
return connection_res.payload;
}
pub fn send(self: *Connection, io: Io, buf: []const u8) !void {
const io_source: std.Random.IoSource = .{ .io = io };
const rand = io_source.interface();
log.debug("Sending connection message", .{});
self.connection.connection.payload = buf;
var connection_bytes_buf: [2048]u8 = undefined;
const connection_bytes = self.connection.toBytes(&connection_bytes_buf);
self.headers.ip.id = rand.int(u16);
self.headers.setPayloadLen(connection_bytes.len);
var msg_buf: [2048]u8 = undefined;
var msg_w: Writer = .fixed(&msg_buf);
try msg_w.writeAll(&self.headers.toBytes());
try msg_w.writeAll(connection_bytes);
const full_msg = msg_w.buffered();
try self.socket.send(full_msg);
log.debug("Sent {} byte connection message", .{full_msg.len});
}
const std = @import("std");
const Io = std.Io;
const Writer = std.Io.Writer;
const log = std.log;
const SaprusMessage = @import("./message.zig").Message;
const EthIpUdp = @import("./EthIpUdp.zig").EthIpUdp;
const RawSocket = @import("./RawSocket.zig");
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