+#include <pthread.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <cstdlib>
+#include <csignal>
+#include <cstring>
+#include <cerrno>
+#include <cmath>
+#include <cstdio>
+
+#include "stg/common.h"
+#include "stg/locker.h"
+
+#include "stg/pinger.h"
+
+#ifdef STG_TIME
+extern volatile time_t stgTime;
+#endif
+
+//-----------------------------------------------------------------------------
+STG_PINGER::STG_PINGER(time_t d)
+ : delay(d),
+ nonstop(false),
+ isRunningRecver(false),
+ isRunningSender(false),
+ sendSocket(-1),
+ recvSocket(-1),
+ sendThread(),
+ recvThread(),
+ pmSend(),
+ pid(0),
+ errorStr(),
+ pingIP(),
+ ipToAdd(),
+ ipToDel(),
+ mutex()
+{
+pthread_mutex_init(&mutex, NULL);
+memset(&pmSend, 0, sizeof(pmSend));
+}
+//-----------------------------------------------------------------------------
+STG_PINGER::~STG_PINGER()
+{
+pthread_mutex_destroy(&mutex);
+}
+//-----------------------------------------------------------------------------
+int STG_PINGER::Start()
+{
+struct protoent *proto = NULL;
+proto = getprotobyname("ICMP");
+sendSocket = socket(PF_INET, SOCK_RAW, proto->p_proto);
+recvSocket = socket(PF_INET, SOCK_RAW, proto->p_proto);
+nonstop = true;
+pid = (int) getpid() % 65535;
+if (sendSocket < 0 || recvSocket < 0)
+ {
+ errorStr = "Cannot create socket.";
+ return -1;
+ }
+
+if (pthread_create(&sendThread, NULL, RunSendPing, this))
+ {
+ errorStr = "Cannot create send thread.";
+ return -1;
+ }
+
+if (pthread_create(&recvThread, NULL, RunRecvPing, this))
+ {
+ errorStr = "Cannot create recv thread.";
+ return -1;
+ }
+
+return 0;
+}
+//-----------------------------------------------------------------------------
+int STG_PINGER::Stop()
+{
+close(recvSocket);
+nonstop = false;
+if (isRunningRecver)
+ {
+ //5 seconds to thread stops itself
+ for (size_t i = 0; i < 25; i++)
+ {
+ if (i % 5 == 0)
+ SendPing(0x0100007f);//127.0.0.1
+
+ if (!isRunningRecver)
+ break;
+
+ struct timespec ts = {0, 200000000};
+ nanosleep(&ts, NULL);
+ }
+ }
+
+if (isRunningSender)
+ {
+ //5 seconds to thread stops itself
+ for (size_t i = 0; i < 25; i++)
+ {
+ if (!isRunningSender)
+ break;
+
+ struct timespec ts = {0, 200000000};
+ nanosleep(&ts, NULL);
+ }
+ }
+
+close(sendSocket);
+
+if (isRunningSender || isRunningRecver)
+ return -1;
+
+return 0;
+}
+//-----------------------------------------------------------------------------
+void STG_PINGER::AddIP(uint32_t ip)
+{
+STG_LOCKER lock(&mutex);
+ipToAdd.push_back(ip);
+}
+//-----------------------------------------------------------------------------
+void STG_PINGER::DelIP(uint32_t ip)
+{
+STG_LOCKER lock(&mutex);
+ipToDel.push_back(ip);
+}
+//-----------------------------------------------------------------------------
+void STG_PINGER::RealAddIP()
+{
+STG_LOCKER lock(&mutex);
+
+std::list<uint32_t>::iterator iter;
+iter = ipToAdd.begin();
+while (iter != ipToAdd.end())
+ {
+ pingIP.insert(std::make_pair(*iter, 0));
+ ++iter;
+ }
+ipToAdd.erase(ipToAdd.begin(), ipToAdd.end());
+}
+//-----------------------------------------------------------------------------
+void STG_PINGER::RealDelIP()
+{
+STG_LOCKER lock(&mutex);
+
+std::list<uint32_t>::iterator iter;
+std::multimap<uint32_t, time_t>::iterator treeIter;
+iter = ipToDel.begin();
+while (iter != ipToDel.end())
+ {
+ treeIter = pingIP.find(*iter);
+ if (treeIter != pingIP.end())
+ pingIP.erase(treeIter);
+
+ ++iter;
+ }
+ipToDel.erase(ipToDel.begin(), ipToDel.end());
+}
+//-----------------------------------------------------------------------------
+void STG_PINGER::PrintAllIP()
+{
+STG_LOCKER lock(&mutex);
+std::multimap<uint32_t, time_t>::iterator iter;
+iter = pingIP.begin();
+while (iter != pingIP.end())
+ {
+ uint32_t ip = iter->first;
+ time_t t = iter->second;
+ std::string s;
+ x2str(t, s);
+ printf("ip = %s, time = %9s\n", inet_ntostring(ip).c_str(), s.c_str());
+ ++iter;
+ }
+
+}
+//-----------------------------------------------------------------------------
+int STG_PINGER::GetIPTime(uint32_t ip, time_t * t) const
+{
+STG_LOCKER lock(&mutex);
+std::multimap<uint32_t, time_t>::const_iterator treeIter;
+
+treeIter = pingIP.find(ip);
+if (treeIter == pingIP.end())
+ return -1;
+
+*t = treeIter->second;
+return 0;
+}
+//-----------------------------------------------------------------------------
+uint16_t STG_PINGER::PingCheckSum(void * data, int len)
+{
+uint16_t * buf = static_cast<uint16_t *>(data);
+uint32_t sum = 0;
+uint32_t result;
+
+for ( sum = 0; len > 1; len -= 2 )
+ sum += *buf++;
+
+if ( len == 1 )
+ sum += *reinterpret_cast<uint8_t*>(buf);
+
+sum = (sum >> 16) + (sum & 0xFFFF);
+sum += (sum >> 16);
+result = ~sum;
+return static_cast<uint16_t>(result);
+}
+//-----------------------------------------------------------------------------
+int STG_PINGER::SendPing(uint32_t ip)
+{
+struct sockaddr_in addr;
+memset(&addr, 0, sizeof(addr));
+addr.sin_family = AF_INET;
+addr.sin_port = 0;
+addr.sin_addr.s_addr = ip;
+
+memset(&pmSend, 0, sizeof(pmSend));
+pmSend.hdr.type = ICMP_ECHO;
+pmSend.hdr.un.echo.id = static_cast<uint16_t>(pid);
+memcpy(pmSend.msg, &ip, sizeof(ip));
+
+pmSend.hdr.checksum = PingCheckSum(&pmSend, sizeof(pmSend));
+
+if (sendto(sendSocket, &pmSend, sizeof(pmSend), 0, (sockaddr *)&addr, sizeof(addr)) <= 0 )
+ {
+ errorStr = "Send ping error: " + std::string(strerror(errno));
+ return -1;
+ }
+
+
+return 0;
+}
+//-----------------------------------------------------------------------------
+uint32_t STG_PINGER::RecvPing()
+{
+struct sockaddr_in addr;
+uint32_t ipAddr = 0;
+
+char buf[128];
+memset(buf, 0, sizeof(buf));
+socklen_t len = sizeof(addr);
+
+if (recvfrom(recvSocket, &buf, sizeof(buf), 0, reinterpret_cast<struct sockaddr*>(&addr), &len))
+ {
+ struct IP_HDR * ip = static_cast<struct IP_HDR *>(static_cast<void *>(buf));
+ struct ICMP_HDR *icmp = static_cast<struct ICMP_HDR *>(static_cast<void *>(buf + ip->ihl * 4));
+
+ if (icmp->un.echo.id != pid)
+ return 0;
+
+ ipAddr = *static_cast<uint32_t*>(static_cast<void *>(buf + sizeof(ICMP_HDR) + ip->ihl * 4));
+ }
+
+return ipAddr;
+}
+//-----------------------------------------------------------------------------
+void * STG_PINGER::RunSendPing(void * d)
+{
+sigset_t signalSet;
+sigfillset(&signalSet);
+pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
+
+STG_PINGER * pinger = static_cast<STG_PINGER *>(d);
+
+pinger->isRunningSender = true;
+time_t lastPing = 0;
+while (pinger->nonstop)
+ {
+ pinger->RealAddIP();
+ pinger->RealDelIP();
+
+ std::multimap<uint32_t, time_t>::iterator iter;
+ iter = pinger->pingIP.begin();
+ while (iter != pinger->pingIP.end())
+ {
+ pinger->SendPing(iter->first);
+ ++iter;
+ }
+
+ time_t currTime;
+
+ #ifdef STG_TIME
+ lastPing = stgTime;
+ currTime = stgTime;
+ #else
+ currTime = lastPing = time(NULL);
+ #endif
+
+ while (currTime - lastPing < pinger->delay && pinger->nonstop)
+ {
+ #ifdef STG_TIME
+ currTime = stgTime;
+ #else
+ currTime = time(NULL);
+ #endif
+ struct timespec ts = {0, 20000000};
+ nanosleep(&ts, NULL);
+ }
+ }
+
+pinger->isRunningSender = false;
+
+return NULL;
+}
+//-----------------------------------------------------------------------------
+void * STG_PINGER::RunRecvPing(void * d)
+{
+sigset_t signalSet;
+sigfillset(&signalSet);
+pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
+
+STG_PINGER * pinger = static_cast<STG_PINGER *>(d);
+
+pinger->isRunningRecver = true;
+
+while (pinger->nonstop)
+ {
+ uint32_t ip = pinger->RecvPing();
+
+ if (ip)
+ {
+ std::multimap<uint32_t, time_t>::iterator treeIterUpper = pinger->pingIP.upper_bound(ip);
+ std::multimap<uint32_t, time_t>::iterator treeIterLower = pinger->pingIP.lower_bound(ip);
+ while (treeIterUpper != treeIterLower)
+ {
+ #ifdef STG_TIME
+ treeIterLower->second = stgTime;
+ #else
+ treeIterLower->second = time(NULL);
+ #endif
+ ++treeIterLower;
+ }
+ }
+
+ }
+pinger->isRunningRecver = false;
+return NULL;
+}
+//-----------------------------------------------------------------------------
git.stg.codes / stg.git / blobdiff