#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pinger.h" #include "stg/common.h" #include "stg/locker.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; usleep(200000); } //after 5 seconds waiting thread still running. now killing it if (isRunningRecver) { if (pthread_kill(recvThread, SIGINT)) { errorStr = "Cannot kill thread."; return -1; } } } if (isRunningSender) { //5 seconds to thread stops itself for (size_t i = 0; i < 25; i++) { if (!isRunningSender) break; usleep(200000); } //after 5 seconds waiting thread still running. now killing it if (isRunningSender) { if (pthread_kill(sendThread, SIGINT)) { errorStr = "Cannot kill thread."; return -1; } } } close(sendSocket); return 0; } //----------------------------------------------------------------------------- void STG_PINGER::AddIP(uint32_t ip) { STG_LOCKER lock(&mutex, __FILE__, __LINE__); ipToAdd.push_back(ip); } //----------------------------------------------------------------------------- void STG_PINGER::DelIP(uint32_t ip) { STG_LOCKER lock(&mutex, __FILE__, __LINE__); ipToDel.push_back(ip); } //----------------------------------------------------------------------------- void STG_PINGER::RealAddIP() { STG_LOCKER lock(&mutex, __FILE__, __LINE__); std::list::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, __FILE__, __LINE__); std::list::iterator iter; std::multimap::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()); } //----------------------------------------------------------------------------- int STG_PINGER::GetPingIPNum() const { return pingIP.size(); } //----------------------------------------------------------------------------- void STG_PINGER::PrintAllIP() { STG_LOCKER lock(&mutex, __FILE__, __LINE__); std::multimap::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, __FILE__, __LINE__); std::multimap::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) { unsigned short * buf = (unsigned short *)data; unsigned int sum = 0; unsigned short result; for ( sum = 0; len > 1; len -= 2 ) sum += *buf++; if ( len == 1 ) sum += *(unsigned char*)buf; sum = (sum >> 16) + (sum & 0xFFFF); sum += (sum >> 16); result = ~sum; return 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 = 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)); int bytes; socklen_t len = sizeof(addr); bytes = recvfrom(recvSocket, &buf, sizeof(buf), 0, (struct sockaddr*)&addr, &len); if (bytes > 0) { struct IP_HDR * ip = (struct IP_HDR *)buf; struct ICMP_HDR *icmp = (struct ICMP_HDR *)(buf + ip->ihl * 4); if (icmp->un.echo.id != pid) return 0; ipAddr = *(uint32_t*)(buf + sizeof(ICMP_HDR) + ip->ihl * 4); } return ipAddr; } //----------------------------------------------------------------------------- void * STG_PINGER::RunSendPing(void * d) { STG_PINGER * pinger = static_cast(d); pinger->isRunningSender = true; time_t lastPing = 0; while (pinger->nonstop) { pinger->RealAddIP(); pinger->RealDelIP(); std::multimap::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 usleep(20000); } } pinger->isRunningSender = false; return NULL; } //----------------------------------------------------------------------------- void * STG_PINGER::RunRecvPing(void * d) { STG_PINGER * pinger = static_cast(d); pinger->isRunningRecver = true; while (pinger->nonstop) { uint32_t ip = pinger->RecvPing(); if (ip) { std::multimap::iterator treeIterUpper = pinger->pingIP.upper_bound(ip); std::multimap::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; } //-----------------------------------------------------------------------------