-
#ifdef WIN32
#include <winsock2.h>
#else
#endif
#include "netbase.h"
-#include "util.h"
#include "net.h"
+//#include "util.h"
+#include "ui_interface.h"
extern int GetRandInt(int nMax);
} l_fp;
-inline void Ntp2Unix(uint32_t &n, time_t &u) {
+inline void Ntp2Unix(const uint32_t &n, time_t &u) {
// Ntp's time scale starts in 1900, Unix in 1970.
u = n - 0x83aa7e80; // 2208988800 1970 - 1900 in seconds
uint8_t mac[5 * sizeof(uint32_t)]; /* mac */
};
-int nServersCount = 107;
+const int nServersCount = 154;
+
+std::string NtpServers[nServersCount] = {
+ // Apple
+ "time.apple.com",
-std::string NtpServers[107] = {
// Microsoft
"time.windows.com",
"time3.google.com",
"time4.google.com",
+ // Hurricane Electric
+ "clock.sjc.he.net",
+ "clock.nyc.he.net",
+
// Russian Federation
+ "ntp.karelia.pro",
+ "ntp.alpet.me",
+ "aviel.alpet.me",
+ "ntp.sampo.ru",
+ "ntp.szt.ru",
"ntp.ix.ru",
"ntp1.stratum2.ru",
"ntp2.stratum2.ru",
"ntp3.stratum2.ru",
"ntp4.stratum2.ru",
"ntp5.stratum2.ru",
- "ntp6.stratum2.ru",
- "ntp7.stratum2.ru",
"ntp1.stratum1.ru",
"ntp2.stratum1.ru",
"ntp3.stratum1.ru",
"ntp4.stratum1.ru",
+ "ntp5.stratum1.ru",
"ntp1.vniiftri.ru",
"ntp2.vniiftri.ru",
"ntp3.vniiftri.ru",
"3.ru.pool.ntp.org",
// United States
+ "tock.cs.unlv.edu",
+ "timex.cs.columbia.edu",
+ "tick.cs.unlv.edu",
+ "sundial.columbia.edu",
+ "ntp-1.ece.cmu.edu",
+ "ntp-2.ece.cmu.edu",
+ "ntp-3.ece.cmu.edu",
+ "ntp1.cs.wisc.edu",
+ "ntp2.cs.wisc.edu",
+ "ntp3.cs.wisc.edu",
+ "ntp4.cs.wisc.edu",
"ntp-01.caltech.edu",
"ntp-02.caltech.edu",
"ntp-03.caltech.edu",
"ntp-04.caltech.edu",
+ "nist0-pa.ustiming.org",
"nist1-pa.ustiming.org",
- "time-a.nist.gov ",
- "time-b.nist.gov ",
- "time-c.nist.gov ",
- "time-d.nist.gov ",
+ "nist2-pa.ustiming.org",
+ "time.nist.gov",
+ "time-a.nist.gov",
+ "time-b.nist.gov",
+ "time-c.nist.gov",
+ "time-d.nist.gov",
+ "time-nw.nist.gov",
"nist1-macon.macon.ga.us",
"nist.netservicesgroup.com",
- "nisttime.carsoncity.k12.mi.us",
- "nist1-lnk.binary.net",
"wwv.nist.gov",
"time-a.timefreq.bldrdoc.gov",
"time-b.timefreq.bldrdoc.gov",
"time-c.timefreq.bldrdoc.gov",
- "time.nist.gov",
"utcnist.colorado.edu",
"utcnist2.colorado.edu",
- "ntp-nist.ldsbc.net",
"nist1-lv.ustiming.org",
"time-nw.nist.gov",
- "nist-time-server.eoni.com",
- "nist-time-server.eoni.com",
"ntp1.bu.edu",
"ntp2.bu.edu",
"ntp3.bu.edu",
"1.us.pool.ntp.org",
"2.us.pool.ntp.org",
"3.us.pool.ntp.org",
+ "otc1.psu.edu",
+ "otc2.psu.edu",
+ "now.okstate.edu",
+ "ntp.colby.edu",
+ "bonehed.lcs.mit.edu",
+ "ntp-s1.cise.ufl.edu",
// South Africa
"ntp1.meraka.csir.co.za",
"3.za.pool.ntp.org",
// Italy
+ "ntp0.ien.it",
+ "ntp1.ien.it",
+ "ntp2.ien.it",
"ntp1.inrim.it",
"ntp2.inrim.it",
"0.it.pool.ntp.org",
// United Kingdom
"ntp2d.mcc.ac.uk",
"ntp2c.mcc.ac.uk",
+ "ntp2b.mcc.ac.uk",
"ntp.exnet.com",
"ntp.cis.strath.ac.uk",
"ntppub.le.ac.uk",
"2.uk.pool.ntp.org",
"3.uk.pool.ntp.org",
+ // Canada
+ "chime.utoronto.ca",
+ "tick.utoronto.ca",
+ "time.nrc.ca",
+ "timelord.uregina.ca",
+ "tock.utoronto.ca",
+ "0.ca.pool.ntp.org",
+ "1.ca.pool.ntp.org",
+ "2.ca.pool.ntp.org",
+ "3.ca.pool.ntp.org",
+
// Japan
"ntp.nict.jp",
"0.jp.pool.ntp.org",
"2.jp.pool.ntp.org",
"3.jp.pool.ntp.org",
- // ... To be continued
-};
-
-bool InitWithRandom(SOCKET &sockfd, socklen_t &servlen, struct sockaddr *pcliaddr) {
- int nAttempt = 0;
-
- while(nAttempt < 100) {
- sockfd = -1;
- nAttempt++;
-
- int nServerNum = GetRandInt(nServersCount);
-
- std::vector<CNetAddr> vIP;
- bool fRet = LookupHost(NtpServers[nServerNum].c_str(), vIP, 10, true);
- if (!fRet)
- continue;
+ // Australia
+ "ntp.cs.mu.oz.au",
+ "augean.eleceng.adelaide.edu.au",
+ "0.au.pool.ntp.org",
+ "1.au.pool.ntp.org",
+ "2.au.pool.ntp.org",
+ "3.au.pool.ntp.org",
- struct sockaddr_in servaddr;
- servaddr.sin_family = AF_INET;
- servaddr.sin_port = htons(123);
+ // Slovenia
+ "time.ijs.si",
- bool found = false;
- for(unsigned int i = 0; i < vIP.size(); i++) {
- if ((found = vIP[i].GetInAddr(&servaddr.sin_addr))) {
- break;
- }
- }
-
- if (!found)
- continue;
+ // Austria
+ "0.at.pool.ntp.org",
+ "1.at.pool.ntp.org",
+ "2.at.pool.ntp.org",
+ "3.at.pool.ntp.org",
- sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+ // ???
+ "clepsydra.dec.com",
- if (sockfd == INVALID_SOCKET)
- continue; // socket initialization error
-
- if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) == -1 ) {
- continue; // "connection" error
- }
-
- *pcliaddr = *((struct sockaddr *) &servaddr);
- servlen = sizeof(servaddr);
- return true;
- }
-
- return false;
-}
+ // ... To be continued
+};
-bool InitWithHost(std::string &strHostName, SOCKET &sockfd, socklen_t &servlen, struct sockaddr *pcliaddr) {
- sockfd = -1;
+bool InitWithHost(const std::string &strHostName, SOCKET &sockfd, socklen_t &servlen, struct sockaddr *pcliaddr) {
+
+ sockfd = INVALID_SOCKET;
std::vector<CNetAddr> vIP;
bool fRet = LookupHost(strHostName.c_str(), vIP, 10, true);
bool found = false;
for(unsigned int i = 0; i < vIP.size(); i++) {
- if ((found = vIP[i].GetInAddr(&servaddr.sin_addr))) {
+ if ((found = vIP[i].GetInAddr(&servaddr.sin_addr)) != false) {
break;
}
}
return true;
}
+bool InitWithRandom(SOCKET &sockfd, socklen_t &servlen, struct sockaddr *pcliaddr) {
+
+ for (int nAttempt = 0; nAttempt < nServersCount; nAttempt++) {
+ int nServerNum = GetRandInt(nServersCount);
+ if (InitWithHost(NtpServers[nServerNum], sockfd, servlen, pcliaddr)) {
+ return true;
+ }
+ }
+
+ return false;
+}
int64_t DoReq(SOCKET sockfd, socklen_t servlen, struct sockaddr cliaddr) {
+
+
#ifdef WIN32
u_long nOne = 1;
if (ioctlsocket(sockfd, FIONBIO, &nOne) == SOCKET_ERROR) {
return -2;
}
+ struct timeval timeout = {10, 0};
struct pkt *msg = new pkt;
struct pkt *prt = new pkt;
+ time_t seconds_transmit;
+ int len = 48;
msg->li_vn_mode=227;
msg->stratum=0;
msg->xmt.Ul_i.Xl_i=0;
msg->xmt.Ul_f.Xl_f=0;
- int len=48;
int retcode = sendto(sockfd, (char *) msg, len, 0, &cliaddr, servlen);
if (retcode < 0) {
- printf("sendto() failed: %d", retcode);
- return -3;
+ printf("sendto() failed: %d\n", retcode);
+ seconds_transmit = -3;
+ goto _end;
}
fd_set fdset;
- struct timeval timeout = {10, 0};
FD_ZERO(&fdset);
FD_SET(sockfd, &fdset);
retcode = select(sockfd + 1, &fdset, NULL, NULL, &timeout);
if (retcode <= 0) {
- printf("recvfrom() error");
- return -4;
+ printf("recvfrom() error\n");
+ seconds_transmit = -4;
+ goto _end;
}
recvfrom(sockfd, (char *) msg, len, 0, NULL, NULL);
-
- ntohl_fp(&msg->rec, &prt->rec);
ntohl_fp(&msg->xmt, &prt->xmt);
-
- time_t seconds_receive;
- time_t seconds_transmit;
-
- Ntp2Unix(prt->rec.Ul_i.Xl_ui, seconds_receive);
Ntp2Unix(prt->xmt.Ul_i.Xl_ui, seconds_transmit);
+ _end:
+
delete msg;
delete prt;
- return (seconds_receive + seconds_transmit) / 2;
+ return seconds_transmit;
}
-int64_t NtpGetTime() {
+int64_t NtpGetTime(CNetAddr& ip) {
struct sockaddr cliaddr;
SOCKET sockfd;
if (!InitWithRandom(sockfd, servlen, &cliaddr))
return -1;
+ ip = CNetAddr(((sockaddr_in *)&cliaddr)->sin_addr);
int64_t nTime = DoReq(sockfd, servlen, cliaddr);
- closesocket(sockfd);
+ CloseSocket(sockfd);
return nTime;
}
-int64_t NtpGetTime(CNetAddr& ip) {
+int64_t NtpGetTime(const std::string &strHostName)
+{
struct sockaddr cliaddr;
SOCKET sockfd;
socklen_t servlen;
- if (!InitWithRandom(sockfd, servlen, &cliaddr))
+ if (!InitWithHost(strHostName, sockfd, servlen, &cliaddr))
return -1;
- ip = CNetAddr(((sockaddr_in *)&cliaddr)->sin_addr);
int64_t nTime = DoReq(sockfd, servlen, cliaddr);
- closesocket(sockfd);
+ CloseSocket(sockfd);
return nTime;
}
-int64_t NtpGetTime(std::string &strHostName)
-{
- struct sockaddr cliaddr;
+// NTP server, which we unconditionally trust. This may be your own installation of ntpd somewhere, for example.
+// "localhost" means "trust no one"
+std::string strTrustedUpstream = "localhost";
- SOCKET sockfd;
- socklen_t servlen;
+// Current offset
+int64_t nNtpOffset = INT64_MAX;
- if (!InitWithHost(strHostName, sockfd, servlen, &cliaddr))
- return -1;
+int64_t GetNtpOffset() {
+ return nNtpOffset;
+}
- int64_t nTime = DoReq(sockfd, servlen, cliaddr);
+void ThreadNtpSamples(void* parg) {
+ const int64_t nMaxOffset = nOneDay; // Not a real limit, just sanity threshold.
- closesocket(sockfd);
+ printf("Trying to find NTP server at localhost...\n");
- return nTime;
-}
+ std::string strLocalHost = "127.0.0.1";
+ if (NtpGetTime(strLocalHost) == GetTime()) {
+ printf("There is NTP server active at localhost, we don't need NTP thread.\n");
+
+ nNtpOffset = 0;
+ return;
+ }
-void ThreadNtpSamples(void* parg)
-{
printf("ThreadNtpSamples started\n");
vnThreadsRunning[THREAD_NTP]++;
// Make this thread recognisable as time synchronization thread
RenameThread("novacoin-ntp-samples");
+ CMedianFilter<int64_t> vTimeOffsets(200,0);
+
while (!fShutdown) {
- CNetAddr ip;
- int64_t nTime = NtpGetTime(ip);
+ if (strTrustedUpstream != "localhost") {
+ // Trying to get new offset sample from trusted NTP server.
+ int64_t nClockOffset = NtpGetTime(strTrustedUpstream) - GetTime();
+
+ if (abs64(nClockOffset) < nMaxOffset) {
+ // Everything seems right, remember new trusted offset.
+ printf("ThreadNtpSamples: new offset sample from %s, offset=%" PRId64 ".\n", strTrustedUpstream.c_str(), nClockOffset);
+ nNtpOffset = nClockOffset;
+ }
+ else {
+ // Something went wrong, disable trusted offset sampling.
+ nNtpOffset = INT64_MAX;
+ strTrustedUpstream = "localhost";
- if (nTime > 0 && nTime != 2085978496) { // Skip the deliberately wrong timestamps
- AddTimeData(ip, nTime);
+ int nSleepMinutes = 1 + GetRandInt(9); // Sleep for 1-10 minutes.
+ for (int i = 0; i < nSleepMinutes * 60 && !fShutdown; i++)
+ Sleep(1000);
+
+ continue;
+ }
}
else {
- Sleep(600000); // In case of failure wait 600 seconds and then try again
- continue;
+ // Now, trying to get 2-4 samples from random NTP servers.
+ int nSamplesCount = 2 + GetRandInt(2);
+
+ for (int i = 0; i < nSamplesCount; i++) {
+ CNetAddr ip;
+ int64_t nClockOffset = NtpGetTime(ip) - GetTime();
+
+ if (abs64(nClockOffset) < nMaxOffset) { // Skip the deliberately wrong timestamps
+ printf("ThreadNtpSamples: new offset sample from %s, offset=%" PRId64 ".\n", ip.ToString().c_str(), nClockOffset);
+ vTimeOffsets.input(nClockOffset);
+ }
+ }
+
+ if (vTimeOffsets.size() > 1) {
+ nNtpOffset = vTimeOffsets.median();
+ }
+ else {
+ // Not enough offsets yet, try to collect additional samples later.
+ nNtpOffset = INT64_MAX;
+ int nSleepMinutes = 1 + GetRandInt(4); // Sleep for 1-5 minutes.
+ for (int i = 0; i < nSleepMinutes * 60 && !fShutdown; i++)
+ Sleep(1000);
+ continue;
+ }
+ }
+
+ if (GetNodesOffset() == INT_MAX && abs64(nNtpOffset) > 40 * 60)
+ {
+ // If there is not enough node offsets data and NTP time offset is greater than 40 minutes then give a warning.
+ std::string strMessage = _("Warning: Please check that your computer's date and time are correct! If your clock is wrong NovaCoin will not work properly.");
+ strMiscWarning = strMessage;
+ printf("*** %s\n", strMessage.c_str());
+ uiInterface.ThreadSafeMessageBox(strMessage+" ", std::string("NovaCoin"), CClientUIInterface::OK | CClientUIInterface::ICON_EXCLAMATION);
}
- Sleep(43200000); // Sleep for 12 hours
+ printf("nNtpOffset = %+" PRId64 " (%+" PRId64 " minutes)\n", nNtpOffset, nNtpOffset/60);
+
+ int nSleepHours = 1 + GetRandInt(5); // Sleep for 1-6 hours.
+ for (int i = 0; i < nSleepHours * 3600 && !fShutdown; i++)
+ Sleep(1000);
}
vnThreadsRunning[THREAD_NTP]--;
git://git.novaco.in / novacoin.git / blobdiff