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|
const is_debug = builtin.mode == .Debug;
const help =
\\-h, --help Display this help and exit.
\\-r, --relay <str> A relay message to send.
\\-d, --dest <str> An IPv4 or <= 4 ASCII byte string.
\\-c, --connect <str> A connection message to send.
\\
;
const Option = enum { help, relay, dest, connect };
const to_option: StaticStringMap(Option) = .initComptime(.{
.{ "-h", .help },
.{ "--help", .help },
.{ "-r", .relay },
.{ "--relay", .relay },
.{ "-d", .dest },
.{ "--dest", .dest },
.{ "-c", .connect },
.{ "--connect", .connect },
});
pub fn main(init: std.process.Init) !void {
// CLI parsing adapted from the example here
// https://codeberg.org/ziglang/zig/pulls/30644
const args = try init.minimal.args.toSlice(init.arena.allocator());
if (args.len == 1) {
std.debug.print("{s}", .{help});
return;
}
var flags: struct {
relay: ?[]const u8 = null,
dest: ?[]const u8 = null,
connect: ?[]const u8 = null,
} = .{};
{
var i: usize = 1;
while (i < args.len) : (i += 1) {
if (to_option.get(args[i])) |opt| {
switch (opt) {
.help => {
std.debug.print("{s}\n", .{help});
return;
},
.relay => {
i += 1;
if (i < args.len) {
flags.relay = args[i];
} else {
std.debug.print("-r/--relay requires a string\n", .{});
return error.InvalidArguments;
}
},
.dest => {
i += 1;
if (i < args.len) {
flags.dest = args[i];
} else {
std.debug.print("-d/--dest requires a string\n", .{});
return error.InvalidArguments;
}
},
.connect => {
i += 1;
if (i < args.len) {
flags.connect = args[i];
} else {
std.debug.print("-c/--connect requires a string\n", .{});
return error.InvalidArguments;
}
},
}
} else {
std.debug.print("Unknown argument: {s}\n", .{args[i]});
return error.InvalidArguments;
}
}
}
if (flags.connect != null and (flags.relay != null or flags.dest != null)) {
std.debug.print("Incompatible arguments.\nCannot use --connect/-c with dest or relay.\n", .{});
return error.InvalidArguments;
}
std.debug.print("relay: {s}\n", .{flags.relay orelse "<null>"});
std.debug.print("dest: {s}\n", .{flags.dest orelse "<null>"});
std.debug.print("connect: {s}\n", .{flags.connect orelse "<null>"});
// const net_interface: std.Io.net.Interface = .{ .index = 1 };
// std.debug.print("Interface: {s}\n", .{(try net_interface.name(init.io)).toSlice()});
const linux_socket = blk: {
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.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(@intCast(linux_socket), @bitCast(std.os.linux.sockaddr.ll{
// 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 = 0,
.pkttype = 0,
.halen = 0,
.addr = @splat(0),
}), @sizeOf(std.os.linux.sockaddr.ll));
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
// var net_buffer: [1500]u8 = undefined;
// var net_writer: NetWriter = try .init(&raw_socket_writer.interface, &net_buffer);
// var client = try SaprusClient.init(&net_writer.interface);
// defer client.deinit();
// if (res.args.relay) |r| {
// const dest = parseDest(res.args.dest);
// try client.sendRelay(
// if (r.len > 0) r else "Hello darkness my old friend",
// dest,
// );
// return;
// } else if (res.args.connect) |c| {
// if (false) {
// _ = client.connect(if (c.len > 0) c else "Hello darkness my old friend") catch |err| switch (err) {
// error.WouldBlock => null,
// else => return err,
// };
// return;
// }
// @panic("Not implemented");
// }
// return clap.helpToFile(.stderr(), clap.Help, ¶ms, .{});
}
fn parseDest(in: ?[]const u8) [4]u8 {
if (in) |dest| {
if (dest.len <= 4) {
var res: [4]u8 = @splat(0);
@memcpy(res[0..dest.len], dest);
return res;
}
const addr = std.Io.net.Ip4Address.parse(dest, 0) catch return "FAIL".*;
return addr.bytes;
}
return "zap\x00".*;
}
const builtin = @import("builtin");
const std = @import("std");
const ArrayList = std.ArrayList;
const StaticStringMap = std.StaticStringMap;
const zaprus = @import("zaprus");
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;
|
