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Diffstat (limited to 'plugins/check_ping.cpp')
| -rw-r--r-- | plugins/check_ping.cpp | 508 |
1 files changed, 508 insertions, 0 deletions
diff --git a/plugins/check_ping.cpp b/plugins/check_ping.cpp new file mode 100644 index 0000000..c918d92 --- /dev/null +++ b/plugins/check_ping.cpp @@ -0,0 +1,508 @@ +/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */ + +#ifndef WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN //else winsock will be included with windows.h and conflict with winsock2 +#endif + +#include "plugins/thresholds.hpp" +#include <boost/program_options.hpp> +#include <iostream> +#include <winsock2.h> +#include <iphlpapi.h> +#include <icmpapi.h> +#include <shlwapi.h> +#include <ws2ipdef.h> +#include <mstcpip.h> +#include <ws2tcpip.h> + +#define VERSION 1.0 + +namespace po = boost::program_options; + +struct response +{ + double avg; + unsigned int pMin = 0; + unsigned int pMax = 0; + unsigned int dropped = 0; +}; + +struct printInfoStruct +{ + threshold warn; + threshold crit; + threshold wpl; + threshold cpl; + std::wstring host; + std::wstring ip; + bool ipv6 = false; + int timeout = 1000; + int num = 5; +}; + +static bool l_Debug; + +static int parseArguments(int ac, WCHAR **av, po::variables_map& vm, printInfoStruct& printInfo) +{ + WCHAR namePath[MAX_PATH]; + GetModuleFileName(NULL, namePath, MAX_PATH); + WCHAR *progName = PathFindFileName(namePath); + + po::options_description desc; + + desc.add_options() + ("help,h", "Print usage message and exit") + ("version,V", "Print version and exit") + ("debug,d", "Verbose/Debug output") + ("host,H", po::wvalue<std::wstring>()->required(), "Target hostname or IP. If an IPv6 address is given, the '-6' option must be set") + (",4", "--Host is an IPv4 address or if it's a hostname: Resolve it to an IPv4 address (default)") + (",6", "--Host is an IPv6 address or if it's a hostname: Resolve it to an IPv6 address") + ("timeout,t", po::value<int>(), "Specify timeout for requests in ms (default=1000)") + ("packets,p", po::value<int>(), "Declare ping count (default=5)") + ("warning,w", po::wvalue<std::wstring>(), "Warning values: rtt,package loss") + ("critical,c", po::wvalue<std::wstring>(), "Critical values: rtt,package loss") + ; + + po::wcommand_line_parser parser(ac, av); + + try { + po::store( + parser + .options(desc) + .style( + po::command_line_style::unix_style | + po::command_line_style::allow_long_disguise & + ~po::command_line_style::allow_guessing + ) + .run(), + vm); + vm.notify(); + } catch (const std::exception& e) { + std::cout << e.what() << '\n' << desc << '\n'; + return 3; + } + + if (vm.count("help")) { + std::wcout << progName << " Help\n\tVersion: " << VERSION << '\n'; + wprintf( + L"%s is a simple program to ping an ip4 address.\n" + L"You can use the following options to define its behaviour:\n\n", progName); + std::cout << desc; + wprintf( + L"\nIt will take at least timeout times number of pings to run\n" + L"Then it will output a string looking something like this:\n\n" + L"\tPING WARNING RTA: 72ms Packet loss: 20%% | ping=72ms;40;80;71;77 pl=20%%;20;50;0;100\n\n" + L"\"PING\" being the type of the check, \"WARNING\" the returned status\n" + L"and \"RTA: 72ms Packet loss: 20%%\" the relevant information.\n" + L"The performance data is found behind the \"|\", in order:\n" + L"returned value, warning threshold, critical threshold, minimal value and,\n" + L"if applicable, the maximal value. \n\n" + L"%s' exit codes denote the following:\n" + L" 0\tOK,\n\tNo Thresholds were broken or the programs check part was not executed\n" + L" 1\tWARNING,\n\tThe warning, but not the critical threshold was broken\n" + L" 2\tCRITICAL,\n\tThe critical threshold was broken\n" + L" 3\tUNKNOWN, \n\tThe program experienced an internal or input error\n\n" + L"Threshold syntax:\n\n" + L"-w THRESHOLD\n" + L"warn if threshold is broken, which means VALUE > THRESHOLD\n" + L"(unless stated differently)\n\n" + L"-w !THRESHOLD\n" + L"inverts threshold check, VALUE < THRESHOLD (analogous to above)\n\n" + L"-w [THR1-THR2]\n" + L"warn is VALUE is inside the range spanned by THR1 and THR2\n\n" + L"-w ![THR1-THR2]\n" + L"warn if VALUE is outside the range spanned by THR1 and THR2\n\n" + L"-w THRESHOLD%%\n" + L"if the plugin accepts percentage based thresholds those will be used.\n" + L"Does nothing if the plugin does not accept percentages, or only uses\n" + L"percentage thresholds. Ranges can be used with \"%%\", but both range values need\n" + L"to end with a percentage sign.\n\n" + L"All of these options work with the critical threshold \"-c\" too.", + progName); + std::cout << '\n'; + return 0; + } + + if (vm.count("version")) { + std::cout << progName << " Version: " << VERSION << '\n'; + return 0; + } + + if (vm.count("-4") && vm.count("-6")) { + std::cout << "Conflicting options \"4\" and \"6\"" << '\n'; + return 3; + } + + printInfo.ipv6 = vm.count("-6") > 0; + + if (vm.count("warning")) { + std::vector<std::wstring> sVec = splitMultiOptions(vm["warning"].as<std::wstring>()); + if (sVec.size() != 2) { + std::cout << "Wrong format for warning thresholds" << '\n'; + return 3; + } + try { + printInfo.warn = threshold(*sVec.begin()); + printInfo.wpl = threshold(sVec.back()); + if (!printInfo.wpl.perc) { + std::cout << "Packet loss must be percentage" << '\n'; + return 3; + } + } catch (const std::invalid_argument& e) { + std::cout << e.what() << '\n'; + return 3; + } + } + + if (vm.count("critical")) { + std::vector<std::wstring> sVec = splitMultiOptions(vm["critical"].as<std::wstring>()); + if (sVec.size() != 2) { + std::cout << "Wrong format for critical thresholds" << '\n'; + return 3; + } + try { + printInfo.crit = threshold(*sVec.begin()); + printInfo.cpl = threshold(sVec.back()); + if (!printInfo.wpl.perc) { + std::cout << "Packet loss must be percentage" << '\n'; + return 3; + } + } catch (const std::invalid_argument& e) { + std::cout << e.what() << '\n'; + return 3; + } + } + + if (vm.count("timeout")) + printInfo.timeout = vm["timeout"].as<int>(); + + if (vm.count("packets")) + printInfo.num = vm["packets"].as<int>(); + + printInfo.host = vm["host"].as<std::wstring>(); + + l_Debug = vm.count("debug") > 0; + + return -1; +} + +static int printOutput(printInfoStruct& printInfo, response& response) +{ + if (l_Debug) + std::wcout << L"Constructing output string" << '\n'; + + state state = OK; + + double plp = ((double)response.dropped / printInfo.num) * 100.0; + + if (printInfo.warn.rend(response.avg) || printInfo.wpl.rend(plp)) + state = WARNING; + + if (printInfo.crit.rend(response.avg) || printInfo.cpl.rend(plp)) + state = CRITICAL; + + std::wstringstream perf; + perf << L"rta=" << response.avg << L"ms;" << printInfo.warn.pString() << L";" + << printInfo.crit.pString() << L";0;" << " pl=" << removeZero(plp) << "%;" + << printInfo.wpl.pString() << ";" << printInfo.cpl.pString() << ";0;100"; + + if (response.dropped == printInfo.num) { + std::wcout << L"PING CRITICAL ALL CONNECTIONS DROPPED | " << perf.str() << '\n'; + return 2; + } + + std::wcout << L"PING "; + + switch (state) { + case OK: + std::wcout << L"OK"; + break; + case WARNING: + std::wcout << L"WARNING"; + break; + case CRITICAL: + std::wcout << L"CRITICAL"; + break; + } + + std::wcout << L" RTA: " << response.avg << L"ms Packet loss: " << removeZero(plp) << "% | " << perf.str() << '\n'; + + return state; +} + +static bool resolveHostname(const std::wstring& hostname, bool ipv6, std::wstring& ipaddr) +{ + ADDRINFOW hints; + ZeroMemory(&hints, sizeof(hints)); + + if (ipv6) + hints.ai_family = AF_INET6; + else + hints.ai_family = AF_INET; + + if (l_Debug) + std::wcout << L"Resolving hostname \"" << hostname << L"\"\n"; + + ADDRINFOW *result = NULL; + DWORD ret = GetAddrInfoW(hostname.c_str(), NULL, &hints, &result); + + if (ret) { + std::wcout << L"Failed to resolve hostname. Error " << ret << L": " << formatErrorInfo(ret) << L"\n"; + return false; + } + + wchar_t ipstringbuffer[46]; + + if (ipv6) { + struct sockaddr_in6 *address6 = (struct sockaddr_in6 *)result->ai_addr; + InetNtop(AF_INET6, &address6->sin6_addr, ipstringbuffer, 46); + } + else { + struct sockaddr_in *address4 = (struct sockaddr_in *)result->ai_addr; + InetNtop(AF_INET, &address4->sin_addr, ipstringbuffer, 46); + } + + if (l_Debug) + std::wcout << L"Resolved to \"" << ipstringbuffer << L"\"\n"; + + ipaddr = ipstringbuffer; + return true; +} + +static int check_ping4(const printInfoStruct& pi, response& response) +{ + if (l_Debug) + std::wcout << L"Parsing ip address" << '\n'; + + in_addr ipDest4; + LPCWSTR term; + if (RtlIpv4StringToAddress(pi.ip.c_str(), TRUE, &term, &ipDest4) == STATUS_INVALID_PARAMETER) { + std::wcout << pi.ip << " is not a valid ip address\n"; + return 3; + } + + if (*term != L'\0') { + std::wcout << pi.ip << " is not a valid ip address\n"; + return 3; + } + + if (l_Debug) + std::wcout << L"Creating Icmp File\n"; + + HANDLE hIcmp; + if ((hIcmp = IcmpCreateFile()) == INVALID_HANDLE_VALUE) + goto die; + + DWORD dwRepSize = sizeof(ICMP_ECHO_REPLY) + 8; + void *repBuf = reinterpret_cast<VOID *>(new BYTE[dwRepSize]); + + if (repBuf == NULL) + goto die; + + unsigned int rtt = 0; + int num = pi.num; + + LARGE_INTEGER frequency; + QueryPerformanceFrequency(&frequency); + + do { + LARGE_INTEGER timer1; + QueryPerformanceCounter(&timer1); + + if (l_Debug) + std::wcout << L"Sending Icmp echo\n"; + + if (!IcmpSendEcho2(hIcmp, NULL, NULL, NULL, ipDest4.S_un.S_addr, + NULL, 0, NULL, repBuf, dwRepSize, pi.timeout)) { + response.dropped++; + if (l_Debug) + std::wcout << L"Dropped: Response was 0" << '\n'; + continue; + } + + if (l_Debug) + std::wcout << "Ping recieved" << '\n'; + + PICMP_ECHO_REPLY pEchoReply = static_cast<PICMP_ECHO_REPLY>(repBuf); + + if (pEchoReply->Status != IP_SUCCESS) { + response.dropped++; + if (l_Debug) + std::wcout << L"Dropped: echo reply status " << pEchoReply->Status << '\n'; + continue; + } + + if (l_Debug) + std::wcout << L"Recorded rtt of " << pEchoReply->RoundTripTime << '\n'; + + rtt += pEchoReply->RoundTripTime; + if (response.pMin == 0 || pEchoReply->RoundTripTime < response.pMin) + response.pMin = pEchoReply->RoundTripTime; + else if (pEchoReply->RoundTripTime > response.pMax) + response.pMax = pEchoReply->RoundTripTime; + + LARGE_INTEGER timer2; + QueryPerformanceCounter(&timer2); + + if (((timer2.QuadPart - timer1.QuadPart) * 1000 / frequency.QuadPart) < pi.timeout) + Sleep((DWORD) (pi.timeout - ((timer2.QuadPart - timer1.QuadPart) * 1000 / frequency.QuadPart))); + } while (--num); + + if (l_Debug) + std::wcout << L"All pings sent. Cleaning up and returning" << '\n'; + + if (hIcmp) + IcmpCloseHandle(hIcmp); + if (repBuf) + delete reinterpret_cast<VOID *>(repBuf); + + response.avg = ((double)rtt / pi.num); + + return -1; + +die: + printErrorInfo(); + if (hIcmp) + IcmpCloseHandle(hIcmp); + if (repBuf) + delete reinterpret_cast<VOID *>(repBuf); + + return 3; +} + +static int check_ping6(const printInfoStruct& pi, response& response) +{ + DWORD dwRepSize = sizeof(ICMPV6_ECHO_REPLY) + 8; + void *repBuf = reinterpret_cast<void *>(new BYTE[dwRepSize]); + + int num = pi.num; + unsigned int rtt = 0; + + if (l_Debug) + std::wcout << L"Parsing ip address" << '\n'; + + sockaddr_in6 ipDest6; + if (RtlIpv6StringToAddressEx(pi.ip.c_str(), &ipDest6.sin6_addr, &ipDest6.sin6_scope_id, &ipDest6.sin6_port)) { + std::wcout << pi.ip << " is not a valid ipv6 address" << '\n'; + return 3; + } + + ipDest6.sin6_family = AF_INET6; + + sockaddr_in6 ipSource6; + ipSource6.sin6_addr = in6addr_any; + ipSource6.sin6_family = AF_INET6; + ipSource6.sin6_flowinfo = 0; + ipSource6.sin6_port = 0; + + if (l_Debug) + std::wcout << L"Creating Icmp File" << '\n'; + + HANDLE hIcmp = Icmp6CreateFile(); + if (hIcmp == INVALID_HANDLE_VALUE) { + printErrorInfo(GetLastError()); + + if (hIcmp) + IcmpCloseHandle(hIcmp); + + if (repBuf) + delete reinterpret_cast<BYTE *>(repBuf); + + return 3; + } else { + IP_OPTION_INFORMATION ipInfo = { 30, 0, 0, 0, NULL }; + + LARGE_INTEGER frequency; + QueryPerformanceFrequency(&frequency); + + do { + LARGE_INTEGER timer1; + QueryPerformanceCounter(&timer1); + + if (l_Debug) + std::wcout << L"Sending Icmp echo" << '\n'; + + if (!Icmp6SendEcho2(hIcmp, NULL, NULL, NULL, &ipSource6, &ipDest6, + NULL, 0, &ipInfo, repBuf, dwRepSize, pi.timeout)) { + response.dropped++; + if (l_Debug) + std::wcout << L"Dropped: Response was 0" << '\n'; + continue; + } + + if (l_Debug) + std::wcout << "Ping recieved" << '\n'; + + Icmp6ParseReplies(repBuf, dwRepSize); + + ICMPV6_ECHO_REPLY *pEchoReply = static_cast<ICMPV6_ECHO_REPLY *>(repBuf); + + if (pEchoReply->Status != IP_SUCCESS) { + response.dropped++; + if (l_Debug) + std::wcout << L"Dropped: echo reply status " << pEchoReply->Status << '\n'; + continue; + } + + rtt += pEchoReply->RoundTripTime; + + if (l_Debug) + std::wcout << L"Recorded rtt of " << pEchoReply->RoundTripTime << '\n'; + + if (response.pMin == 0 || pEchoReply->RoundTripTime < response.pMin) + response.pMin = pEchoReply->RoundTripTime; + else if (pEchoReply->RoundTripTime > response.pMax) + response.pMax = pEchoReply->RoundTripTime; + + LARGE_INTEGER timer2; + QueryPerformanceCounter(&timer2); + + if (((timer2.QuadPart - timer1.QuadPart) * 1000 / frequency.QuadPart) < pi.timeout) + Sleep((DWORD) (pi.timeout - ((timer2.QuadPart - timer1.QuadPart) * 1000 / frequency.QuadPart))); + } while (--num); + + if (l_Debug) + std::wcout << L"All pings sent. Cleaning up and returning" << '\n'; + + if (hIcmp) + IcmpCloseHandle(hIcmp); + + if (repBuf) + delete reinterpret_cast<BYTE *>(repBuf); + + response.avg = ((double)rtt / pi.num); + + return -1; + } +} + +int wmain(int argc, WCHAR **argv) +{ + WSADATA dat; + if (WSAStartup(MAKEWORD(2, 2), &dat)) { + std::cout << "WSAStartup failed\n"; + return 3; + } + + po::variables_map vm; + printInfoStruct printInfo; + if (parseArguments(argc, argv, vm, printInfo) != -1) + return 3; + + if (!resolveHostname(printInfo.host, printInfo.ipv6, printInfo.ip)) + return 3; + + response response; + + if (printInfo.ipv6) { + if (check_ping6(printInfo, response) != -1) + return 3; + } else { + if (check_ping4(printInfo, response) != -1) + return 3; + } + + WSACleanup(); + + return printOutput(printInfo, response); +} |