stglibs/pinger.lib/pinger.cpp

   1 #include <stdlib.h>
   2 #include <pthread.h>
   3 #include <signal.h>
   4 #include <netdb.h>
   5 #include <sys/types.h>
   6 #include <sys/socket.h>
   7 #include <netinet/in.h>
   8 #include <arpa/inet.h>
   9 #include <sys/time.h>
  10 #include <string.h>
  11 #include <unistd.h>
  12 #include <fcntl.h>
  13 #include <errno.h>
  14 #include <math.h>
  15 #include <stdio.h>
  16
  17 #include "pinger.h"
  18 #include "stg/common.h"
  19 #include "stg/locker.h"
  20
  21 #ifdef STG_TIME
  22 extern volatile time_t stgTime;
  23 #endif
  24
  25 //-----------------------------------------------------------------------------
  26 STG_PINGER::STG_PINGER(time_t d)
  27     : delay(d),
  28       nonstop(false),
  29       isRunningRecver(false),
  30       isRunningSender(false),
  31       sendSocket(-1),
  32       recvSocket(-1),
  33       sendThread(),
  34       recvThread(),
  35       pmSend(),
  36       pid(0),
  37       errorStr(),
  38       pingIP(),
  39       ipToAdd(),
  40       ipToDel(),
  41       mutex()
  42 {
  43     pthread_mutex_init(&mutex, NULL);
  44     memset(&pmSend, 0, sizeof(pmSend));
  45 }
  46 //-----------------------------------------------------------------------------
  47 STG_PINGER::~STG_PINGER()
  48 {
  49     pthread_mutex_destroy(&mutex);
  50 }
  51 //-----------------------------------------------------------------------------
  52 int STG_PINGER::Start()
  53 {
  54     struct protoent *proto = NULL;
  55     proto = getprotobyname("ICMP");
  56     sendSocket = socket(PF_INET, SOCK_RAW, proto->p_proto);
  57     recvSocket = socket(PF_INET, SOCK_RAW, proto->p_proto);
  58     nonstop = true;
  59     pid = (int) getpid() % 65535;
  60     if (sendSocket < 0 || recvSocket < 0)
  61         {
  62         errorStr = "Cannot create socket.";
  63         return -1;
  64         }
  65
  66     if (pthread_create(&sendThread, NULL, RunSendPing, this))
  67         {
  68         errorStr = "Cannot create send thread.";
  69         return -1;
  70         }
  71
  72     if (pthread_create(&recvThread, NULL, RunRecvPing, this))
  73         {
  74         errorStr = "Cannot create recv thread.";
  75         return -1;
  76         }
  77
  78     return 0;
  79 }
  80 //-----------------------------------------------------------------------------
  81 int STG_PINGER::Stop()
  82 {
  83     close(recvSocket);
  84     nonstop = false;
  85     if (isRunningRecver)
  86         {
  87         //5 seconds to thread stops itself
  88         for (size_t i = 0; i < 25; i++)
  89             {
  90             if (i % 5 == 0)
  91                 SendPing(0x0100007f);//127.0.0.1
  92
  93             if (!isRunningRecver)
  94                 break;
  95
  96             usleep(200000);
  97             }
  98
  99         //after 5 seconds waiting thread still running. now killing it
 100         if (isRunningRecver)
 101             {
 102             if (pthread_kill(recvThread, SIGINT))
 103                 {
 104                 errorStr = "Cannot kill thread.";
 105                 return -1;
 106                 }
 107             }
 108         }
 109
 110     if (isRunningSender)
 111         {
 112         //5 seconds to thread stops itself
 113         for (size_t i = 0; i < 25; i++)
 114             {
 115             if (!isRunningSender)
 116                 break;
 117
 118             usleep(200000);
 119             }
 120
 121         //after 5 seconds waiting thread still running. now killing it
 122         if (isRunningSender)
 123             {
 124             if (pthread_kill(sendThread, SIGINT))
 125                 {
 126                 errorStr = "Cannot kill thread.";
 127                 return -1;
 128                 }
 129             }
 130         }
 131
 132     close(sendSocket);
 133     return 0;
 134 }
 135 //-----------------------------------------------------------------------------
 136 void STG_PINGER::AddIP(uint32_t ip)
 137 {
 138     STG_LOCKER lock(&mutex, __FILE__, __LINE__);
 139     ipToAdd.push_back(ip);
 140 }
 141 //-----------------------------------------------------------------------------
 142 void STG_PINGER::DelIP(uint32_t ip)
 143 {
 144     STG_LOCKER lock(&mutex, __FILE__, __LINE__);
 145     ipToDel.push_back(ip);
 146 }
 147 //-----------------------------------------------------------------------------
 148 void STG_PINGER::RealAddIP()
 149     {
 150     STG_LOCKER lock(&mutex, __FILE__, __LINE__);
 151
 152     std::list<uint32_t>::iterator iter;
 153     iter = ipToAdd.begin();
 154     while (iter != ipToAdd.end())
 155         {
 156         pingIP.insert(std::make_pair(*iter, 0));
 157         ++iter;
 158         }
 159     ipToAdd.erase(ipToAdd.begin(), ipToAdd.end());
 160     }
 161 //-----------------------------------------------------------------------------
 162 void STG_PINGER::RealDelIP()
 163 {
 164     STG_LOCKER lock(&mutex, __FILE__, __LINE__);
 165
 166     std::list<uint32_t>::iterator iter;
 167     std::multimap<uint32_t, time_t>::iterator treeIter;
 168     iter = ipToDel.begin();
 169     while (iter != ipToDel.end())
 170         {
 171         treeIter = pingIP.find(*iter);
 172         if (treeIter != pingIP.end())
 173             pingIP.erase(treeIter);
 174
 175         ++iter;
 176         }
 177     ipToDel.erase(ipToDel.begin(), ipToDel.end());
 178 }
 179 //-----------------------------------------------------------------------------
 180 int STG_PINGER::GetPingIPNum() const
 181 {
 182     return pingIP.size();
 183 }
 184 //-----------------------------------------------------------------------------
 185 void STG_PINGER::PrintAllIP()
 186 {
 187     STG_LOCKER lock(&mutex, __FILE__, __LINE__);
 188     std::multimap<uint32_t, time_t>::iterator iter;
 189     iter = pingIP.begin();
 190     while (iter != pingIP.end())
 191         {
 192         uint32_t ip = iter->first;
 193         time_t t = iter->second;
 194         std::string s;
 195         x2str(t, s);
 196         printf("ip = %s, time = %9s\n", inet_ntostring(ip).c_str(), s.c_str());
 197         ++iter;
 198         }
 199
 200 }
 201 //-----------------------------------------------------------------------------
 202 int STG_PINGER::GetIPTime(uint32_t ip, time_t * t) const
 203 {
 204     STG_LOCKER lock(&mutex, __FILE__, __LINE__);
 205     std::multimap<uint32_t, time_t>::const_iterator treeIter;
 206
 207     treeIter = pingIP.find(ip);
 208     if (treeIter == pingIP.end())
 209         return -1;
 210
 211     *t = treeIter->second;
 212     return 0;
 213 }
 214 //-----------------------------------------------------------------------------
 215 uint16_t STG_PINGER::PingCheckSum(void * data, int len)
 216 {
 217     unsigned short * buf = (unsigned short *)data;
 218     unsigned int sum = 0;
 219     unsigned short result;
 220
 221     for ( sum = 0; len > 1; len -= 2 )
 222         sum += *buf++;
 223
 224     if ( len == 1 )
 225         sum += *(unsigned char*)buf;
 226
 227     sum = (sum >> 16) + (sum & 0xFFFF);
 228     sum += (sum >> 16);
 229     result = ~sum;
 230     return result;
 231 }
 232 //-----------------------------------------------------------------------------
 233 int STG_PINGER::SendPing(uint32_t ip)
 234 {
 235     struct sockaddr_in addr;
 236     memset(&addr, 0, sizeof(addr));
 237     addr.sin_family = AF_INET;
 238     addr.sin_port = 0;
 239     addr.sin_addr.s_addr = ip;
 240
 241     memset(&pmSend, 0, sizeof(pmSend));
 242     pmSend.hdr.type = ICMP_ECHO;
 243     pmSend.hdr.un.echo.id = pid;
 244     memcpy(pmSend.msg, &ip, sizeof(ip));
 245
 246     pmSend.hdr.checksum = PingCheckSum(&pmSend, sizeof(pmSend));
 247
 248     if (sendto(sendSocket, &pmSend, sizeof(pmSend), 0, (sockaddr *)&addr, sizeof(addr)) <= 0 )
 249         {
 250         errorStr = "Send ping error: " + std::string(strerror(errno));
 251         return -1;
 252         }
 253
 254
 255     return 0;
 256 }
 257 //-----------------------------------------------------------------------------
 258 uint32_t STG_PINGER::RecvPing()
 259 {
 260     struct sockaddr_in addr;
 261     uint32_t ipAddr = 0;
 262
 263     char buf[128];
 264     memset(buf, 0, sizeof(buf));
 265     int bytes;
 266     socklen_t len = sizeof(addr);
 267
 268     bytes = recvfrom(recvSocket, &buf, sizeof(buf), 0, (struct sockaddr*)&addr, &len);
 269     if (bytes > 0)
 270         {
 271         struct IP_HDR * ip = (struct IP_HDR *)buf;
 272         struct ICMP_HDR *icmp = (struct ICMP_HDR *)(buf + ip->ihl * 4);
 273
 274         if (icmp->un.echo.id != pid)
 275             return 0;
 276
 277         ipAddr = *(uint32_t*)(buf + sizeof(ICMP_HDR) + ip->ihl * 4);
 278         }
 279
 280     return ipAddr;
 281 }
 282 //-----------------------------------------------------------------------------
 283 void * STG_PINGER::RunSendPing(void * d)
 284 {
 285     STG_PINGER * pinger = static_cast<STG_PINGER *>(d);
 286
 287     pinger->isRunningSender = true;
 288     time_t lastPing = 0;
 289     while (pinger->nonstop)
 290         {
 291         pinger->RealAddIP();
 292         pinger->RealDelIP();
 293
 294         std::multimap<uint32_t, time_t>::iterator iter;
 295         iter = pinger->pingIP.begin();
 296         while (iter != pinger->pingIP.end())
 297             {
 298             pinger->SendPing(iter->first);
 299             ++iter;
 300             }
 301
 302         time_t currTime;
 303
 304         #ifdef STG_TIME
 305         lastPing = stgTime;
 306         currTime = stgTime;
 307         #else
 308         currTime = lastPing = time(NULL);
 309         #endif
 310
 311         while (currTime - lastPing < pinger->delay && pinger->nonstop)
 312             {
 313             #ifdef STG_TIME
 314             currTime = stgTime;
 315             #else
 316             currTime = time(NULL);
 317             #endif
 318             usleep(20000);
 319             }
 320         }
 321
 322     pinger->isRunningSender = false;
 323
 324     return NULL;
 325 }
 326 //-----------------------------------------------------------------------------
 327 void * STG_PINGER::RunRecvPing(void * d)
 328 {
 329     STG_PINGER * pinger = static_cast<STG_PINGER *>(d);
 330
 331     pinger->isRunningRecver = true;
 332
 333     while (pinger->nonstop)
 334         {
 335         uint32_t ip = pinger->RecvPing();
 336
 337         if (ip)
 338             {
 339             std::multimap<uint32_t, time_t>::iterator treeIterUpper = pinger->pingIP.upper_bound(ip);
 340             std::multimap<uint32_t, time_t>::iterator treeIterLower = pinger->pingIP.lower_bound(ip);
 341             while (treeIterUpper != treeIterLower)
 342                 {
 343                 #ifdef STG_TIME
 344                 treeIterLower->second = stgTime;
 345                 #else
 346                 treeIterLower->second = time(NULL);
 347                 #endif
 348                 ++treeIterLower;
 349                 }
 350             }
 351
 352         }
 353     pinger->isRunningRecver = false;
 354     return NULL;
 355 }
 356 //-----------------------------------------------------------------------------