bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
{
vIP.clear();
{
CNetAddr addr;
if (addr.SetSpecial(std::string(pszName))) {
vIP.push_back(addr);
return true;
}
}
struct addrinfo aiHint;
memset(&aiHint, 0, sizeof(struct addrinfo));
aiHint.ai_socktype = SOCK_STREAM;
aiHint.ai_protocol = IPPROTO_TCP;
#ifdef USE_IPV6
aiHint.ai_family = AF_UNSPEC;
#else
aiHint.ai_family = AF_INET;
#endif
#ifdef WIN32
aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
#else
aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
#endif
struct addrinfo *aiRes = NULL;
int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes);
if (nErr)
return false;
struct addrinfo *aiTrav = aiRes;
while (aiTrav != NULL && (nMaxSolutions == 0 || vIP.size() < nMaxSolutions))
{
if (aiTrav->ai_family == AF_INET)
{
assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
}
#ifdef USE_IPV6
if (aiTrav->ai_family == AF_INET6)
{
assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr));
}
#endif
aiTrav = aiTrav->ai_next;
}
freeaddrinfo(aiRes);
return (vIP.size() > 0);
}
int CAddrInfo::GetNewBucket(const uint256& nKey, const CNetAddr& src) const
{
std::vector<unsigned char> vchSourceGroupKey = src.GetGroup();
uint64_t hash1 = (CHashWriter(SER_GETHASH, 0) << nKey << GetGroup() << vchSourceGroupKey).GetHash().GetLow64();
uint64_t hash2 = (CHashWriter(SER_GETHASH, 0) << nKey << vchSourceGroupKey << (hash1 % ADDRMAN_NEW_BUCKETS_PER_SOURCE_GROUP)).GetHash().GetLow64();
return hash2 % ADDRMAN_NEW_BUCKET_COUNT;
}
/** Check if a network address is allowed to access the HTTP server */
static bool ClientAllowed(const CNetAddr& netaddr)
{
if (!netaddr.IsValid())
return false;
BOOST_FOREACH (const CSubNet& subnet, rpc_allow_subnets)
if (subnet.Match(netaddr))
return true;
return false;
}
int CAddrInfo::GetNewBucket(const std::vector<unsigned char>& nKey, const CNetAddr& src) const
{
CDataStream ss1(SER_GETHASH, 0);
std::vector<unsigned char> vchGroupKey = GetGroup();
std::vector<unsigned char> vchSourceGroupKey = src.GetGroup();
ss1 << nKey << vchGroupKey << vchSourceGroupKey;
uint64_t hash1 = Hash(ss1.begin(), ss1.end()).GetLow64();
CDataStream ss2(SER_GETHASH, 0);
ss2 << nKey << vchSourceGroupKey << (hash1 % ADDRMAN_NEW_BUCKETS_PER_SOURCE_GROUP);
uint64_t hash2 = Hash(ss2.begin(), ss2.end()).GetLow64();
return hash2 % ADDRMAN_NEW_BUCKET_COUNT;
}
int64 NtpGetTime(const std::string &strHostName) {
int64 nTime;
SOCKET sockfd;
socklen_t servlen;
struct sockaddr cliaddr;
if(!InitWithHost(strHostName, sockfd, servlen, &cliaddr))
return(-1);
CNetAddr ip = ((sockaddr_in *) &cliaddr)->sin_addr;
printf("NtpGetTime() : querying an NTP server %s\n", ip.ToStringIP().c_str());
nTime = DoReq(sockfd, servlen, cliaddr);
closesocket(sockfd);
if((nTime > 0) && (nTime != 2085978496)) {
printf("NtpGetTime() : time sample %" PRI64d " offset %+" PRI64d " received from %s\n",
nTime, nTime - GetTime(), ip.ToStringIP().c_str());
}
return(nTime);
}
// int CAddrInfo::GetNewBucket(const std::vector<unsigned char> &nKey, const CNetAddr& src) const
int CAddrInfo::GetNewBucket(const uint256& nKey, const CNetAddr& src) const
{
// CDataStream ss1(SER_GETHASH, 0);
// std::vector<unsigned char> vchGroupKey = GetGroup();
std::vector<unsigned char> vchSourceGroupKey = src.GetGroup();
// ss1 << nKey << vchGroupKey << vchSourceGroupKey;
/* ss1 << nKey << vchGroupKey << vchSourceGroupKey;
uint64_t hash1 = Hash(ss1.begin(), ss1.end()).GetCheapHash();
CDataStream ss2(SER_GETHASH, 0);
// ss2 << nKey << vchSourceGroupKey << (hash1 % ADDRMAN_NEW_BUCKETS_PER_SOURCE_GROUP);
ss2 << nKey << vchSourceGroupKey << (hash1 % ADDRMAN_NEW_BUCKETS_PER_SOURCE_GROUP);
uint64_t hash2 = Hash(ss2.begin(), ss2.end()).GetCheapHash();
*/
uint64_t hash1 = (CHashWriter(SER_GETHASH, 0) << nKey << GetGroup() << vchSourceGroupKey).GetHash().GetCheapHash();
uint64_t hash2 = (CHashWriter(SER_GETHASH, 0) << nKey << vchSourceGroupKey << (hash1 % ADDRMAN_NEW_BUCKETS_PER_SOURCE_GROUP)).GetHash().GetCheapHash();
return hash2 % ADDRMAN_NEW_BUCKET_COUNT;
}
bool GetMyExternalIP2(const CService& addrConnect, const char* pszGet, const char* pszKeyword, CNetAddr& ipRet)
{
SOCKET hSocket;
if(!ConnectSocket(addrConnect, hSocket))
return error("GetMyExternalIP() : connection to %s failed", addrConnect.ToString().c_str());
send(hSocket, pszGet, strlen(pszGet), MSG_NOSIGNAL);
string strLine;
while(RecvLine(hSocket, strLine))
{
if(strLine.empty()) // HTTP response is separated from headers by blank line
{
loop
{
if(!RecvLine(hSocket, strLine))
{
closesocket(hSocket);
return false;
}
if(pszKeyword == NULL)
break;
if(strLine.find(pszKeyword) != string::npos)
{
strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword));
break;
}
}
closesocket(hSocket);
if(strLine.find("<") != string::npos)
strLine = strLine.substr(0, strLine.find("<"));
strLine = strLine.substr(strspn(strLine.c_str(), " \t\n\r"));
while(strLine.size() > 0 && isspace(strLine[strLine.size()-1]))
strLine.resize(strLine.size()-1);
CService addr(strLine,0,true);
printf("GetMyExternalIP() received [%s] %s\n", strLine.c_str(), addr.ToString().c_str());
if(!addr.IsValid() || !addr.IsRoutable())
return false;
ipRet.SetIP(addr);
return true;
}
}
void ThreadIRCSeed2(void* parg)
{
// Don't connect to IRC if we won't use IPv4 connections.
if (IsLimited(NET_IPV4))
return;
// ... or if we won't make outbound connections and won't accept inbound ones.
if (mapArgs.count("-connect") && fNoListen)
return;
// ... or if IRC is not enabled.
if (!GetBoolArg("-irc", false))
return;
printf("ThreadIRCSeed started\n");
int nErrorWait = 10;
int nRetryWait = 10;
int nNameRetry = 0;
while (!fShutdown)
{
CService addrConnect("92.243.23.21", 6667); // irc.lfnet.org
CService addrIRC("irc.lfnet.org", 6667, true);
if (addrIRC.IsValid())
addrConnect = addrIRC;
SOCKET hSocket;
if (!ConnectSocket(addrConnect, hSocket))
{
printf("IRC connect failed\n");
nErrorWait = nErrorWait * 11 / 10;
if (Wait(nErrorWait += 60))
continue;
else
return;
}
if (!RecvUntil(hSocket, "Found your hostname", "using your IP address instead", "Couldn't look up your hostname", "ignoring hostname"))
{
closesocket(hSocket);
hSocket = INVALID_SOCKET;
nErrorWait = nErrorWait * 11 / 10;
if (Wait(nErrorWait += 60))
continue;
else
return;
}
CNetAddr addrIPv4("1.2.3.4"); // arbitrary IPv4 address to make GetLocal prefer IPv4 addresses
CService addrLocal;
string strMyName;
// Don't use our IP as our nick if we're not listening
// or if it keeps failing because the nick is already in use.
if (!fNoListen && GetLocal(addrLocal, &addrIPv4) && nNameRetry<3)
strMyName = EncodeAddress(GetLocalAddress(&addrConnect));
if (strMyName == "")
strMyName = strprintf("x%"PRIu64"", GetRand(1000000000));
Send(hSocket, strprintf("NICK %s\r", strMyName.c_str()).c_str());
Send(hSocket, strprintf("USER %s 8 * : %s\r", strMyName.c_str(), strMyName.c_str()).c_str());
int nRet = RecvUntil(hSocket, " 004 ", " 433 ");
if (nRet != 1)
{
closesocket(hSocket);
hSocket = INVALID_SOCKET;
if (nRet == 2)
{
printf("IRC name already in use\n");
nNameRetry++;
Wait(10);
continue;
}
nErrorWait = nErrorWait * 11 / 10;
if (Wait(nErrorWait += 60))
continue;
else
return;
}
nNameRetry = 0;
MilliSleep(500);
// Get our external IP from the IRC server and re-nick before joining the channel
CNetAddr addrFromIRC;
if (GetIPFromIRC(hSocket, strMyName, addrFromIRC))
{
printf("GetIPFromIRC() returned %s\n", addrFromIRC.ToString().c_str());
// Don't use our IP as our nick if we're not listening
if (!fNoListen && addrFromIRC.IsRoutable())
{
// IRC lets you to re-nick
AddLocal(addrFromIRC, LOCAL_IRC);
strMyName = EncodeAddress(GetLocalAddress(&addrConnect));
Send(hSocket, strprintf("NICK %s\r", strMyName.c_str()).c_str());
}
}
if (fTestNet) {
Send(hSocket, "JOIN #WebcoinTEST\r");
Send(hSocket, "WHO #WebcoinTEST\r");
} else {
// randomly join #Webcoin00-#Webcoin05
//int channel_number = GetRandInt(5);
int channel_number = 0;
// Channel number is always 0 for initial release
//int channel_number = 0;
Send(hSocket, strprintf("JOIN #Webcoin%02d\r", channel_number).c_str());
Send(hSocket, strprintf("WHO #Webcoin%02d\r", channel_number).c_str());
}
int64_t nStart = GetTime();
string strLine;
strLine.reserve(10000);
while (!fShutdown && RecvLineIRC(hSocket, strLine))
{
if (strLine.empty() || strLine.size() > 900 || strLine[0] != ':')
continue;
vector<string> vWords;
ParseString(strLine, ' ', vWords);
if (vWords.size() < 2)
continue;
char pszName[10000];
pszName[0] = '\0';
if (vWords[1] == "352" && vWords.size() >= 8)
{
// index 7 is limited to 16 characters
// could get full length name at index 10, but would be different from join messages
strlcpy(pszName, vWords[7].c_str(), sizeof(pszName));
printf("IRC got who\n");
}
if (vWords[1] == "JOIN" && vWords[0].size() > 1)
{
// :[email protected] JOIN :#channelname
strlcpy(pszName, vWords[0].c_str() + 1, sizeof(pszName));
if (strchr(pszName, '!'))
*strchr(pszName, '!') = '\0';
printf("IRC got join\n");
}
if (pszName[0] == 'u')
{
CAddress addr;
if (DecodeAddress(pszName, addr))
{
addr.nTime = GetAdjustedTime();
if (addrman.Add(addr, addrConnect, 51 * 60))
printf("IRC got new address: %s\n", addr.ToString().c_str());
nGotIRCAddresses++;
}
else
{
printf("IRC decode failed\n");
}
}
}
closesocket(hSocket);
hSocket = INVALID_SOCKET;
if (GetTime() - nStart > 20 * 60)
{
nErrorWait /= 3;
nRetryWait /= 3;
}
nRetryWait = nRetryWait * 11 / 10;
if (!Wait(nRetryWait += 60))
return;
}
}
static UniValue setban(const JSONRPCRequest& request)
{
std::string strCommand;
if (!request.params[1].isNull())
strCommand = request.params[1].get_str();
if (request.fHelp || request.params.size() < 2 ||
(strCommand != "add" && strCommand != "remove"))
throw std::runtime_error(
"setban \"subnet\" \"add|remove\" (bantime) (absolute)\n"
"\nAttempts to add or remove an IP/Subnet from the banned list.\n"
"\nArguments:\n"
"1. \"subnet\" (string, required) The IP/Subnet (see getpeerinfo for nodes IP) with an optional netmask (default is /32 = single IP)\n"
"2. \"command\" (string, required) 'add' to add an IP/Subnet to the list, 'remove' to remove an IP/Subnet from the list\n"
"3. \"bantime\" (numeric, optional) time in seconds how long (or until when if [absolute] is set) the IP is banned (0 or empty means using the default time of 24h which can also be overwritten by the -bantime startup argument)\n"
"4. \"absolute\" (boolean, optional) If set, the bantime must be an absolute timestamp in seconds since epoch (Jan 1 1970 GMT)\n"
"\nExamples:\n"
+ HelpExampleCli("setban", "\"192.168.0.6\" \"add\" 86400")
+ HelpExampleCli("setban", "\"192.168.0.0/24\" \"add\"")
+ HelpExampleRpc("setban", "\"192.168.0.6\", \"add\", 86400")
);
if(!g_connman)
throw JSONRPCError(RPC_CLIENT_P2P_DISABLED, "Error: Peer-to-peer functionality missing or disabled");
CSubNet subNet;
CNetAddr netAddr;
bool isSubnet = false;
if (request.params[0].get_str().find('/') != std::string::npos)
isSubnet = true;
if (!isSubnet) {
CNetAddr resolved;
LookupHost(request.params[0].get_str().c_str(), resolved, false);
netAddr = resolved;
}
else
LookupSubNet(request.params[0].get_str().c_str(), subNet);
if (! (isSubnet ? subNet.IsValid() : netAddr.IsValid()) )
throw JSONRPCError(RPC_CLIENT_INVALID_IP_OR_SUBNET, "Error: Invalid IP/Subnet");
if (strCommand == "add")
{
if (isSubnet ? g_connman->IsBanned(subNet) : g_connman->IsBanned(netAddr))
throw JSONRPCError(RPC_CLIENT_NODE_ALREADY_ADDED, "Error: IP/Subnet already banned");
int64_t banTime = 0; //use standard bantime if not specified
if (!request.params[2].isNull())
banTime = request.params[2].get_int64();
bool absolute = false;
if (request.params[3].isTrue())
absolute = true;
isSubnet ? g_connman->Ban(subNet, BanReasonManuallyAdded, banTime, absolute) : g_connman->Ban(netAddr, BanReasonManuallyAdded, banTime, absolute);
}
else if(strCommand == "remove")
{
if (!( isSubnet ? g_connman->Unban(subNet) : g_connman->Unban(netAddr) ))
throw JSONRPCError(RPC_CLIENT_INVALID_IP_OR_SUBNET, "Error: Unban failed. Requested address/subnet was not previously banned.");
}
return NullUniValue;
}
bool static LookupIntern(const char* pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
{
vIP.clear();
{
CNetAddr addr;
if (addr.SetSpecial(std::string(pszName))) {
vIP.push_back(addr);
return true;
}
}
#ifdef HAVE_GETADDRINFO_A
struct in_addr ipv4_addr;
#ifdef HAVE_INET_PTON
if (inet_pton(AF_INET, pszName, &ipv4_addr) > 0) {
vIP.push_back(CNetAddr(ipv4_addr));
return true;
}
struct in6_addr ipv6_addr;
if (inet_pton(AF_INET6, pszName, &ipv6_addr) > 0) {
vIP.push_back(CNetAddr(ipv6_addr));
return true;
}
#else
ipv4_addr.s_addr = inet_addr(pszName);
if (ipv4_addr.s_addr != INADDR_NONE) {
vIP.push_back(CNetAddr(ipv4_addr));
return true;
}
#endif
#endif
struct addrinfo aiHint;
memset(&aiHint, 0, sizeof(struct addrinfo));
aiHint.ai_socktype = SOCK_STREAM;
aiHint.ai_protocol = IPPROTO_TCP;
aiHint.ai_family = AF_UNSPEC;
#ifdef WIN32
aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
#else
aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
#endif
struct addrinfo* aiRes = NULL;
#ifdef HAVE_GETADDRINFO_A
struct gaicb gcb, *query = &gcb;
memset(query, 0, sizeof(struct gaicb));
gcb.ar_name = pszName;
gcb.ar_request = &aiHint;
int nErr = getaddrinfo_a(GAI_NOWAIT, &query, 1, NULL);
if (nErr)
return false;
do {
// Should set the timeout limit to a resonable value to avoid
// generating unnecessary checking call during the polling loop,
// while it can still response to stop request quick enough.
// 2 seconds looks fine in our situation.
struct timespec ts = {2, 0};
gai_suspend(&query, 1, &ts);
boost::this_thread::interruption_point();
nErr = gai_error(query);
if (0 == nErr)
aiRes = query->ar_result;
} while (nErr == EAI_INPROGRESS);
#else
int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes);
#endif
if (nErr)
return false;
struct addrinfo* aiTrav = aiRes;
while (aiTrav != NULL && (nMaxSolutions == 0 || vIP.size() < nMaxSolutions)) {
if (aiTrav->ai_family == AF_INET) {
assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
}
if (aiTrav->ai_family == AF_INET6) {
assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr));
}
aiTrav = aiTrav->ai_next;
}
freeaddrinfo(aiRes);
return (vIP.size() > 0);
}
static CNetAddr CreateInternal(const char* host)
{
CNetAddr addr;
addr.SetInternal(host);
return addr;
}
/** check whether a given address is in a network we can probably connect to */
bool IsReachable(const CNetAddr &addr)
{
LOCK(cs_mapLocalHost);
enum Network net = addr.GetNetwork();
return vfReachable[net] && !vfLimited[net];
}
bool IsLimited(const CNetAddr &addr)
{
return IsLimited(addr.GetNetwork());
}
void ThreadIRCSeed2(void* parg)
{
/* Dont advertise on IRC if we don't allow incoming connections */
if(mapArgs.count("-connect") || fNoListen)
return;
if(!GetBoolArg("-irc", false))
return;
printf("ThreadIRCSeed started\n");
int nErrorWait = 10;
int nRetryWait = 10;
bool fNameInUse = false;
while(!fShutdown)
{
CService addrConnect("92.243.23.21", 6667); // irc.lfnet.org
CService addrIRC("irc.lfnet.org", 6667, true);
if(addrIRC.IsValid())
addrConnect = addrIRC;
SOCKET hSocket;
if(!ConnectSocket(addrConnect, hSocket))
{
printf("IRC connect failed\n");
nErrorWait = nErrorWait * 11 / 10;
if(Wait(nErrorWait += 60))
continue;
else
return;
}
if(!RecvUntil(hSocket, "Found your hostname", "using your IP address instead", "Couldn't look up your hostname", "ignoring hostname"))
{
closesocket(hSocket);
hSocket = INVALID_SOCKET;
nErrorWait = nErrorWait * 11 / 10;
if(Wait(nErrorWait += 60))
continue;
else
return;
}
string strMyName;
if(addrLocalHost.IsRoutable() && !fUseProxy && !fNameInUse)
strMyName = EncodeAddress(addrLocalHost);
else
strMyName = strprintf("x%u", GetRand(1000000000));
Send(hSocket, strprintf("NICK %s\r", strMyName.c_str()).c_str());
Send(hSocket, strprintf("USER %s 8 * : %s\r", strMyName.c_str(), strMyName.c_str()).c_str());
int nRet = RecvUntil(hSocket, " 004 ", " 433 ");
if(nRet != 1)
{
closesocket(hSocket);
hSocket = INVALID_SOCKET;
if(nRet == 2)
{
printf("IRC name already in use\n");
fNameInUse = true;
Wait(10);
continue;
}
nErrorWait = nErrorWait * 11 / 10;
if(Wait(nErrorWait += 60))
continue;
else
return;
}
Sleep(500);
// Get our external IP from the IRC server and re-nick before joining the channel
CNetAddr addrFromIRC;
if(GetIPFromIRC(hSocket, strMyName, addrFromIRC))
{
printf("GetIPFromIRC() returned %s\n", addrFromIRC.ToString().c_str());
if(!fUseProxy && addrFromIRC.IsRoutable())
{
// IRC lets you to re-nick
fGotExternalIP = true;
addrLocalHost.SetIP(addrFromIRC);
strMyName = EncodeAddress(addrLocalHost);
Send(hSocket, strprintf("NICK %s\r", strMyName.c_str()).c_str());
}
}
if(fTestNet) {
Send(hSocket, "JOIN #bitcoinTEST\r");
Send(hSocket, "WHO #bitcoinTEST\r");
} else {
// randomly join #bitcoin00-#bitcoin99
int channel_number = GetRandInt(100);
Send(hSocket, strprintf("JOIN #bitcoin%02d\r", channel_number).c_str());
Send(hSocket, strprintf("WHO #bitcoin%02d\r", channel_number).c_str());
}
int64 nStart = GetTime();
string strLine;
strLine.reserve(10000);
while(!fShutdown && RecvLineIRC(hSocket, strLine))
{
if(strLine.empty() || strLine.size() > 900 || strLine[0] != ':')
continue;
vector<string> vWords;
ParseString(strLine, ' ', vWords);
if(vWords.size() < 2)
continue;
char pszName[10000];
pszName[0] = '\0';
if(vWords[1] == "352" && vWords.size() >= 8)
{
// index 7 is limited to 16 characters
// could get full length name at index 10, but would be different from join messages
strlcpy(pszName, vWords[7].c_str(), sizeof(pszName));
printf("IRC got who\n");
}
if(vWords[1] == "JOIN" && vWords[0].size() > 1)
{
// :[email protected] JOIN :#channelname
strlcpy(pszName, vWords[0].c_str() + 1, sizeof(pszName));
if(strchr(pszName, '!'))
*strchr(pszName, '!') = '\0';
printf("IRC got join\n");
}
if(pszName[0] == 'u')
{
CAddress addr;
if(DecodeAddress(pszName, addr))
{
addr.nTime = GetAdjustedTime();
if(addrman.Add(addr, addrConnect, 51 * 60))
printf("IRC got new address: %s\n", addr.ToString().c_str());
nGotIRCAddresses++;
}
else
{
printf("IRC decode failed\n");
}
}
}
closesocket(hSocket);
hSocket = INVALID_SOCKET;
if(GetTime() - nStart > 20 * 60)
{
nErrorWait /= 3;
nRetryWait /= 3;
}
nRetryWait = nRetryWait * 11 / 10;
if(!Wait(nRetryWait += 60))
return;
}
}
int64_t DoReq(SOCKET sockfd, socklen_t servlen, struct sockaddr cliaddr) {
#ifdef WIN32
u_long nOne = 1;
if (ioctlsocket(sockfd, FIONBIO, &nOne) == SOCKET_ERROR) {
printf("ConnectSocket() : ioctlsocket non-blocking setting failed, error %d\n", WSAGetLastError());
#else
if (fcntl(sockfd, F_SETFL, O_NONBLOCK) == SOCKET_ERROR) {
printf("ConnectSocket() : fcntl non-blocking setting failed, error %d\n", errno);
#endif
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->ppoll=4;
msg->precision=0;
msg->rootdelay=0;
msg->rootdispersion=0;
msg->ref.Ul_i.Xl_i=0;
msg->ref.Ul_f.Xl_f=0;
msg->org.Ul_i.Xl_i=0;
msg->org.Ul_f.Xl_f=0;
msg->rec.Ul_i.Xl_i=0;
msg->rec.Ul_f.Xl_f=0;
msg->xmt.Ul_i.Xl_i=0;
msg->xmt.Ul_f.Xl_f=0;
int retcode = sendto(sockfd, (char *) msg, len, 0, &cliaddr, servlen);
if (retcode < 0) {
printf("sendto() failed: %d\n", retcode);
seconds_transmit = -3;
goto _end;
}
fd_set fdset;
FD_ZERO(&fdset);
FD_SET(sockfd, &fdset);
retcode = select(sockfd + 1, &fdset, NULL, NULL, &timeout);
if (retcode <= 0) {
printf("recvfrom() error\n");
seconds_transmit = -4;
goto _end;
}
recvfrom(sockfd, (char *) msg, len, 0, NULL, NULL);
ntohl_fp(&msg->xmt, &prt->xmt);
Ntp2Unix(prt->xmt.Ul_i.Xl_ui, seconds_transmit);
_end:
delete msg;
delete prt;
return seconds_transmit;
}
int64_t NtpGetTime(CNetAddr& ip) {
struct sockaddr cliaddr;
SOCKET sockfd;
socklen_t servlen;
if (!InitWithRandom(sockfd, servlen, &cliaddr))
return -1;
ip = CNetAddr(((sockaddr_in *)&cliaddr)->sin_addr);
int64_t nTime = DoReq(sockfd, servlen, cliaddr);
closesocket(sockfd);
return nTime;
}
int64_t NtpGetTime(const std::string &strHostName)
{
struct sockaddr cliaddr;
SOCKET sockfd;
socklen_t servlen;
if (!InitWithHost(strHostName, sockfd, servlen, &cliaddr))
return -1;
int64_t nTime = DoReq(sockfd, servlen, cliaddr);
closesocket(sockfd);
return nTime;
}
// 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";
// Current offset
int64_t nNtpOffset = INT64_MAX;
int64_t GetNtpOffset() {
return nNtpOffset;
}
void ThreadNtpSamples(void* parg) {
const int64_t nMaxOffset = 86400; // Not a real limit, just sanity threshold.
printf("Trying to find NTP server at localhost...\n");
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;
}
printf("ThreadNtpSamples started\n");
vnThreadsRunning[THREAD_NTP]++;
// Make this thread recognisable as time synchronization thread
RenameThread("Chipcoin-ntp-samples");
CMedianFilter<int64_t> vTimeOffsets(200,0);
while (!fShutdown) {
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";
int nSleepMinutes = 1 + GetRandInt(9); // Sleep for 1-10 minutes.
for (int i = 0; i < nSleepMinutes * 60 && !fShutdown; i++)
MilliSleep(1000);
continue;
}
}
else {
// 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++)
MilliSleep(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 Chipcoin will not work properly.");
strMiscWarning = strMessage;
printf("*** %s\n", strMessage.c_str());
uiInterface.ThreadSafeMessageBox(strMessage+" ", std::string("Chipcoin"), CClientUIInterface::OK | CClientUIInterface::ICON_EXCLAMATION);
}
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++)
MilliSleep(1000);
}
vnThreadsRunning[THREAD_NTP]--;
printf("ThreadNtpSamples exited\n");
}