105 lines
3.4 KiB
Zig
105 lines
3.4 KiB
Zig
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const std = @import("std");
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const hexdump = @import("./hexdump.zig");
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const testing = std.testing;
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const net = std.net;
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const os = std.os;
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const fmt = std.fmt;
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const print = std.debug.print;
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// const config = .{.safety = true};
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// var gpa = std.heap.GeneralPurposeAllocator(config){};
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// defer _ = gpa.deinit();
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// const allocator = gpa.allocator();
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fn disconnect(stream: *net.StreamServer) void { stream.close(); }
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fn server_init() net.StreamServer {
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// no reuse_address and default kernel_backlog
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return net.StreamServer.init(.{});
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}
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fn remove_unix_socket(path: []const u8) void {
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std.fs.deleteFileAbsolute(path) catch |err| switch(err) {
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else => { print("error: {}\n", .{err}); }
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};
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}
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fn waiting_for_connection(stream: *net.StreamServer
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, path: []const u8) !net.StreamServer.Connection {
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var address = try net.Address.initUnix(path);
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try stream.listen(address);
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// const linux = os.linux;
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// var tfd = try os.timerfd_create(linux.CLOCK.MONOTONIC, linux.TFD.CLOEXEC);
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// defer os.close(tfd);
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// // Fire event 10_000_000ns = 10s after the os.timerfd_settime call.
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// var sit: linux.itimerspec = .{ .it_interval = .{ .tv_sec = 0, .tv_nsec = 0 }
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// , .it_value = .{ .tv_sec = 0, .tv_nsec = 10 * (1000 * 1000 * 1000) } };
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// print("before os.timerfd_settime\n", .{});
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// try os.timerfd_settime(tfd, 0, &sit, null);
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// var fds: [2]os.pollfd =
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// .{ .{ .fd = tfd, .events = os.linux.POLL.IN, .revents = 0 }
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// , .{ .fd = lfd, .events = os.linux.POLL.IN, .revents = 0 }};
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// var count = try os.poll(&fds, -1); // -1 => infinite waiting
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var waiting_duration: i32 = 10 * 1000; // in ms
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print("waiting for 10 seconds, tops\n", .{});
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var ssockfd = stream.sockfd; // actual listener (server)
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var lfd: os.socket_t = undefined;
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if (ssockfd) |sfd| { lfd = sfd; }
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else { return error.Undefined; }
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print("Let's wait for an event (either stdin or unix socket)\n", .{});
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var count: usize = undefined;
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while(true) {
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var fds: [2]os.pollfd =
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.{.{ .fd = 0, .events = os.linux.POLL.IN, .revents = 0 }
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, .{ .fd = lfd, .events = os.linux.POLL.IN, .revents = 0 }};
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print("fds: {any}\n", .{fds});
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count = try os.poll(&fds, waiting_duration);
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if (count == 0) { print("no client, still waiting\n", .{}); continue; }
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print("fds NOW: {any}\n", .{fds});
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break;
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}
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return stream.accept();
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}
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fn receive_msg(stream: net.Stream) !void {
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var buffer: [1000]u8 = undefined;
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var fbs = std.io.fixedBufferStream(&buffer);
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var reader = fbs.reader();
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_ = try stream.read(buffer[0..]);
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const msg_type = try reader.readByte();
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const msg_len = try reader.readIntBig(u32);
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const msg_payload = buffer[5..5+msg_len];
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print ("type: {}, len {}, content: {s}\n"
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, .{msg_type, msg_len, msg_payload});
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}
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pub fn main() !u8 {
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var path = "/tmp/.TEST_USOCK";
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print("Init UNIX server to {s}...\n", .{path});
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var stream = server_init();
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defer stream.deinit();
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defer remove_unix_socket(path);
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// TODO
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print("Waiting for a connection...\n", .{});
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var connection = try waiting_for_connection(&stream, path);
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print("Someone is connected! Receiving a message...\n", .{});
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try receive_msg(connection.stream);
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print("Disconnection...\n", .{});
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disconnect(&stream);
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print("Disconnected!\n", .{});
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return 0;
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}
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