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Niklas Friesen
2026-03-05 20:18:29 +01:00
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/* This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.
In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
For more information, please refer to <http://unlicense.org>
Additionally, the ntp_packet struct uses code licensed under the BSD 3-clause.*/
/* This homebrew uses code from https://github.com/lettier/ntpclient under the following license:
BSD 3-Clause License
Copyright (c) 2014, David Lettier
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of the copyright holder nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This code comes from https://github.com/thedax/NX-ntpc, thank you for your work
#include "ntcp.hpp"
#include <cstring>
#include <sstream>
#include <time.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <errno.h>
#include <stdarg.h>
#include <string>
#include <switch.h>
#define NTP_TIMESTAMP_DELTA 2208988800ull
/* ------------- BEGIN BSD 3-CLAUSE LICENSED CODE-------------------- */
// https://www.cisco.com/c/en/us/about/press/internet-protocol-journal/back-issues/table-contents-58/154-ntp.html
// Struct adapted from https://github.com/lettier/ntpclient , see LICENSE-THIRD-PARTY for more information.
typedef struct
{
uint8_t li_vn_mode; // li: two bits, leap indicator. vn: three bits, protocol version number. mode: three bits, client mode.
uint8_t stratum; // Stratum level of the local clock.
uint8_t poll; // Maximum interval between successive messages.
uint8_t precision; // Precision of the local clock.
uint32_t rootDelay; // Total round trip delay time.
uint32_t rootDispersion; // Max error allowed from primary clock source.
uint32_t refId; // Reference clock identifier.
uint32_t refTm_s; // Reference time-stamp seconds.
uint32_t refTm_f; // Reference time-stamp fraction of a second.
uint32_t origTm_s; // Originate time-stamp seconds.
uint32_t origTm_f; // Originate time-stamp fraction of a second.
uint32_t rxTm_s; // Received time-stamp seconds.
uint32_t rxTm_f; // Received time-stamp fraction of a second.
uint32_t txTm_s; // Transmit time-stamp seconds.
uint32_t txTm_f; // Transmit time-stamp fraction of a second.
} ntp_packet;
/* ------------- END BSD 3-CLAUSE LICENSED CODE-------------------- */
void serviceCleanup(void)
{
nifmExit();
setsysExit();
timeExit();
}
void print(const std::string& msg)
{
puts(msg);
consoleUpdate(NULL);
}
void printWithArgs(const std::string& msg, ...)
{
va_list args;
va_start(args, msg);
vprintf(msg, args);
va_end(args);
consoleUpdate(NULL);
}
// We need system service access, not just user (the default)
std::string syncTime()
{
const std::string& server_name = "0.pool.ntp.org";
const uint16_t port = 123;
int sockfd = -1;
std::stringstream out;
int res = 0;
time_t tim;
Result rs = timeInitialize();
if(R_FAILED(rs))
{
//printWithArgs("Failed to init time services, error code %x\n", rs);
out << "Failed to init time services, error code " << rs << std::endl;
goto done;
}
rs = nifmInitialize(NifmServiceType_User);
if(R_FAILED(rs))
{
//printWithArgs("Failed to init nifm services, with error code %x\n", rs);
out << "Failed to init nifm services, with error code " << rs << std::endl;
goto done;
}
NifmInternetConnectionStatus nifmICS;
rs = nifmGetInternetConnectionStatus(NULL, NULL, &nifmICS);
if(R_FAILED(rs))
{
//printWithArgs("Failed to get internet connection status, with error code %x\nPlease ensure your console is connected to the internet, and try again.\n", rs);
out << "Failed to get internet connection status, with error code " << res << ". Please ensure your console is connected to the internet, and try again." << std::endl;
goto done;
}
if(nifmICS != NifmInternetConnectionStatus_Connected)
{
//print("You're not connected to the internet. Please run this application again after connecting.");
out << "You're not connected to the internet. Please run this application again after connecting." << std::endl;
goto done;
}
ntp_packet packet;
memset(&packet, 0, sizeof(ntp_packet));
packet.li_vn_mode = (0 << 6) | (4 << 3) | 3; // LI 0 | Client version 4 | Mode 3
packet.txTm_s = htonl(NTP_TIMESTAMP_DELTA + time(NULL)); // Current networktime on the console
struct sockaddr_in serv_addr;
struct hostent *server;
sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(sockfd < 0)
{
//printWithArgs("Failed to open socket with error code %x\n", errno);
out << "Failed to open socket with error code " << errno << std::endl;
goto done;
}
//print("Opened socket");
//printWithArgs("Attempting to connect to %s\n", server_name);
errno = 0;
if((server = gethostbyname(server_name)) == NULL)
{
//printWithArgs("Gethostbyname failed: %x\n", errno);
out << "Gethostbyname failed: " << errno << std::endl;
goto done;
}
memset(&serv_addr, 0, sizeof(struct sockaddr_in));
serv_addr.sin_family = AF_INET;
memcpy((char *)&serv_addr.sin_addr.s_addr, (char *)server->h_addr_list[0], 4);
serv_addr.sin_port = htons(port);
errno = 0;
if((res = connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr))) < 0)
{
//printWithArgs("Connect failed: %x %x\n", res, errno);
out << "Connect failed: " << res << " " << errno << std::endl;
goto done;
}
errno = 0;
if((res = send(sockfd, (char *)&packet, sizeof(ntp_packet), 0)) < 0)
{
//printWithArgs("Error writing to socket: %x %x\n", res, errno);
out << "Error writing to socket: " << res << " " << errno << std::endl;
goto done;
}
printWithArgs("Sent time request with result: %x %x, waiting for response...\n", res, errno);
errno = 0;
if((res = recv(sockfd, (char *)&packet, sizeof(ntp_packet), 0)) < sizeof(ntp_packet))
{
//printWithArgs("Error reading from socket: %x %x\n", res, errno);
out << "Error reading from socket: " << res << " " << errno << std::endl;
goto done;
}
packet.txTm_s = ntohl(packet.txTm_s);
tim = (time_t) (packet.txTm_s - NTP_TIMESTAMP_DELTA);
rs = timeSetCurrentTime(TimeType_NetworkSystemClock, (uint64_t)tim);
if(R_FAILED(rs))
{
//printWithArgs("Failed to set NetworkSystemClock, %x\n", rs);
out << "Failed to set NetworkSystemClock " << rs << std::endl;
}
else
out << "Successfully set NetworkSystemClock" << std::endl;
rs = setsysInitialize();
if(R_FAILED(rs))
{
//printWithArgs("setsysInitialize failed, %x\n", rs);
out << "setsysInitialize failed, " << rs << std::endl;
goto done;
}
bool internetTimeSync;
rs = setsysIsUserSystemClockAutomaticCorrectionEnabled(&internetTimeSync);
if(R_FAILED(rs) || internetTimeSync == false)
{
//printWithArgs("Unable to detect if internet time sync is enabled, %x\n", rs);
out << "Note: internet time sync is not enabled (enabling it will correct the time on the home screen)" << std::endl;
goto done;
}
/* if(internetTimeSync == false)
{
print("Internet time sync is not enabled (enabling it will correct the time on the home screen, and this prompt will not appear again).\nPress A to enable internet time sync (and restart the console), or PLUS to quit.");
rs = setsysSetUserSystemClockAutomaticCorrectionEnabled(true);
if(R_SUCCEEDED(rs))
{
serviceCleanup();
bpcInitialize();
bpcRebootSystem();
bpcExit();
}
} */
done:
cleanup:
if(sockfd != -1)
close(sockfd);
serviceCleanup();
return out.str();
}