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#include "stdafx.h"
#include "icmp.h"
ICMP ICMP::instance;
ICMP::ICMP():
timeout(2000),
functions_loaded(false)
{
hDLL = LoadLibrary("ICMP.DLL");
if(!hDLL) return;
pIcmpCreateFile = (pfnHV)GetProcAddress(hDLL, "IcmpCreateFile");
pIcmpCloseHandle = (pfnBH)GetProcAddress(hDLL, "IcmpCloseHandle");
pIcmpSendEcho = (pfnDHDPWPipPDD)GetProcAddress(hDLL, "IcmpSendEcho");
if ((pIcmpCreateFile == 0) || (pIcmpCloseHandle == 0) || (pIcmpSendEcho == 0)) {
return;
}
WSAData wsaData;
if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0) {
WSACleanup();
FreeLibrary((HMODULE)hDLL);
return;
}
functions_loaded = true;
}
void ICMP::stop() {
if(hIP) {
pIcmpCloseHandle(hIP);
hIP = 0;
}
}
ICMP::~ICMP() {
if(hIP) pIcmpCloseHandle(hIP);
WSACleanup();
if(hDLL)
FreeLibrary(hDLL);
}
bool ICMP::ping(char *host, IP_ECHO_REPLY &reply) {
if(!functions_loaded) return false;
DWORD address;
struct in_addr dest;
HOSTENT *rec;
IP_OPTION_INFORMATION ipoi;
hIP = pIcmpCreateFile();
if (hIP == INVALID_HANDLE_VALUE) {
return false;
}
dest.s_addr = inet_addr(host);
if (dest.s_addr == INADDR_NONE) {
rec = gethostbyname(host);
if(rec) address = *(DWORD *)(*rec->h_addr_list);
else return false;
} else {
address = dest.s_addr;
}
ipoi.Ttl = 255;
ipoi.Tos = 0;
ipoi.Flags = 0;
ipoi.OptionsSize = 0;
ipoi.OptionsData = 0;
reply.Status = 0;
pIcmpSendEcho(hIP, address, (void *)"PINGPONG", 8, &ipoi, &reply, sizeof(reply), timeout);
if(hIP) {
pIcmpCloseHandle(hIP);
hIP = 0;
}
return (reply.Status == 0);
}
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