RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 06:17:34 +00:00
Code Issues Activity Actions

ntpquery: Make output less verbose by default

Browse source
This commit is contained in:
Nico Weber 2020-10-05 15:17:33 -04:00 • committed by Andreas Kling
parent f31ff86d14
commit f5af127887
1 changed files with 24 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

43
Userland/ntpquery.cpp
View file

@ -109,10 +109,12 @@ int main(int argc, char** argv)
}
bool set_time = false;
bool verbose = false;
// FIXME: Change to serenityos.pool.ntp.org once https://manage.ntppool.org/manage/vendor/zone?a=km5a8h&id=vz-14154g is approved.
const char* host = "time.google.com";
Core::ArgsParser args_parser;
args_parser.add_option(set_time, "Adjust system time (requires root)", "set", 's');
args_parser.add_option(verbose, "Verbose output", "verbose", 'v');
args_parser.add_positional_argument(host, "NTP server", "host", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
@ -218,25 +220,27 @@ int main(int argc, char** argv)
}
}
printf("NTP response from %s:\n", inet_ntoa(peer_address.sin_addr));
printf("Leap Information: %d\n", packet.li_vn_mode >> 6);
printf("Version Number: %d\n", (packet.li_vn_mode >> 3) & 7);
printf("Mode: %d\n", packet.li_vn_mode & 7);
printf("Stratum: %d\n", packet.stratum);
printf("Poll: %d\n", packet.stratum);
printf("Precision: %d\n", packet.precision);
printf("Root delay: %#x\n", ntohl(packet.root_delay));
printf("Root dispersion: %#x\n", ntohl(packet.root_dispersion));
printf("Reference ID: %#x\n", ntohl(packet.reference_id));
printf("Reference timestamp: %#016llx (%s)\n", be64toh(packet.reference_timestamp), format_ntp_timestamp(be64toh(packet.reference_timestamp)).characters());
printf("Origin timestamp: %#016llx (%s)\n", origin_timestamp, format_ntp_timestamp(origin_timestamp).characters());
printf("Receive timestamp: %#016llx (%s)\n", receive_timestamp, format_ntp_timestamp(receive_timestamp).characters());
printf("Transmit timestamp: %#016llx (%s)\n", transmit_timestamp, format_ntp_timestamp(transmit_timestamp).characters());
printf("Destination timestamp: %#016llx (%s)\n", destination_timestamp, format_ntp_timestamp(destination_timestamp).characters());
if (verbose) {
printf("NTP response from %s:\n", inet_ntoa(peer_address.sin_addr));
printf("Leap Information: %d\n", packet.li_vn_mode >> 6);
printf("Version Number: %d\n", (packet.li_vn_mode >> 3) & 7);
printf("Mode: %d\n", packet.li_vn_mode & 7);
printf("Stratum: %d\n", packet.stratum);
printf("Poll: %d\n", packet.stratum);
printf("Precision: %d\n", packet.precision);
printf("Root delay: %#x\n", ntohl(packet.root_delay));
printf("Root dispersion: %#x\n", ntohl(packet.root_dispersion));
printf("Reference ID: %#x\n", ntohl(packet.reference_id));
printf("Reference timestamp: %#016llx (%s)\n", be64toh(packet.reference_timestamp), format_ntp_timestamp(be64toh(packet.reference_timestamp)).characters());
printf("Origin timestamp: %#016llx (%s)\n", origin_timestamp, format_ntp_timestamp(origin_timestamp).characters());
printf("Receive timestamp: %#016llx (%s)\n", receive_timestamp, format_ntp_timestamp(receive_timestamp).characters());
printf("Transmit timestamp: %#016llx (%s)\n", transmit_timestamp, format_ntp_timestamp(transmit_timestamp).characters());
printf("Destination timestamp: %#016llx (%s)\n", destination_timestamp, format_ntp_timestamp(destination_timestamp).characters());
// When the system isn't under load, user-space t and packet_t are identical. If a shell with `yes` is running, it can be as high as 30ms in this program,
// which gets user-space time immediately after the recvmsg() call. In programs that have an event loop reading from multiple sockets, it could be higher.
printf("Receive latency: %lld.%06d s\n", t.tv_sec, t.tv_usec);
// When the system isn't under load, user-space t and packet_t are identical. If a shell with `yes` is running, it can be as high as 30ms in this program,
// which gets user-space time immediately after the recvmsg() call. In programs that have an event loop reading from multiple sockets, it could be higher.
printf("Receive latency: %lld.%06d s\n", t.tv_sec, t.tv_usec);
}
// Parts of the "Clock Filter" computations, https://tools.ietf.org/html/rfc5905#section-10
NtpTimestamp T1 = origin_timestamp;
@ -256,6 +260,7 @@ int main(int argc, char** argv)
// Both T2-T1 and T3-T4 estimate this; this takes the average of both.
// Or, equivalently, (T1+T4)/2 estimates local time, (T2+T3)/2 estimate server time, this is the difference.
double offset_s = 0.5 * (timestamp_difference_in_seconds(T1, T2) + timestamp_difference_in_seconds(T4, T3));
printf("Delay: %f\n", delay_s);
if (verbose)
printf("Delay: %f\n", delay_s);
printf("Offset: %f\n", offset_s);
}