mirror of
https://git.robbyzambito.me/zaprus/
synced 2026-02-04 03:34:48 +00:00
78 lines
2.4 KiB
Zig
78 lines
2.4 KiB
Zig
// Copyright 2026 Robby Zambito
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//
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// This file is part of zaprus.
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//
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// Zaprus is free software: you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the Free Software
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// Foundation, either version 3 of the License, or (at your option) any later
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// version.
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//
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// Zaprus is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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// A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along with
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// Zaprus. If not, see <https://www.gnu.org/licenses/>.
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socket: RawSocket,
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headers: EthIpUdp,
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connection: SaprusMessage,
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const Connection = @This();
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pub fn init(socket: RawSocket, headers: EthIpUdp, connection: SaprusMessage) Connection {
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return .{
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.socket = socket,
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.headers = headers,
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.connection = connection,
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};
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}
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pub fn next(self: Connection, io: Io, buf: []u8) ![]const u8 {
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_ = io;
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log.debug("Awaiting connection message", .{});
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const res = try self.socket.receive(buf);
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log.debug("Received {} byte connection message", .{res.len});
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const msg: SaprusMessage = try .parse(res[42..]);
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const connection_res = msg.connection;
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log.debug("Payload was {s}", .{connection_res.payload});
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return connection_res.payload;
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}
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pub fn send(self: *Connection, io: Io, buf: []const u8) !void {
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const io_source: std.Random.IoSource = .{ .io = io };
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const rand = io_source.interface();
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log.debug("Sending connection message", .{});
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self.connection.connection.payload = buf;
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var connection_bytes_buf: [2048]u8 = undefined;
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const connection_bytes = self.connection.toBytes(&connection_bytes_buf);
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self.headers.ip.id = rand.int(u16);
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self.headers.setPayloadLen(connection_bytes.len);
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var msg_buf: [2048]u8 = undefined;
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var msg_w: Writer = .fixed(&msg_buf);
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try msg_w.writeAll(&self.headers.toBytes());
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try msg_w.writeAll(connection_bytes);
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const full_msg = msg_w.buffered();
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try self.socket.send(full_msg);
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log.debug("Sent {} byte connection message", .{full_msg.len});
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}
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const std = @import("std");
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const Io = std.Io;
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const Writer = std.Io.Writer;
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const log = std.log;
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const SaprusMessage = @import("./message.zig").Message;
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const EthIpUdp = @import("./EthIpUdp.zig").EthIpUdp;
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const RawSocket = @import("./RawSocket.zig");
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