windows-nt/Source/XPSP1/NT/net/wlbs/nlbmgr/tmgr/nlbhost_ping.cpp

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2020-09-26 03:20:57 -05:00
/*++
Copyright(c) 2001 Microsoft Corporation
Module Name:
NLB Manager
File Name:
nlbhost_ping.cpp
Abstract:
Implementation of Ping-related functionality of class NLBHost
This code is adapted from the "ping" utility.
History:
03/31/01 JosephJ Created
--*/
#include "stdafx.h"
#include "ipexport.h"
#include "icmpapi.h"
#include "private.h"
#if 0
struct IPErrorTable {
IP_STATUS Error; // The IP Error
DWORD ErrorNlsID; // NLS string ID
} ErrorTable[] =
{
{ IP_BUF_TOO_SMALL, PING_BUF_TOO_SMALL},
{ IP_DEST_NET_UNREACHABLE, PING_DEST_NET_UNREACHABLE},
{ IP_DEST_HOST_UNREACHABLE, PING_DEST_HOST_UNREACHABLE},
{ IP_DEST_PROT_UNREACHABLE, PING_DEST_PROT_UNREACHABLE},
{ IP_DEST_PORT_UNREACHABLE, PING_DEST_PORT_UNREACHABLE},
{ IP_NO_RESOURCES, PING_NO_RESOURCES},
{ IP_BAD_OPTION, PING_BAD_OPTION},
{ IP_HW_ERROR, PING_HW_ERROR},
{ IP_PACKET_TOO_BIG, PING_PACKET_TOO_BIG},
{ IP_REQ_TIMED_OUT, PING_REQ_TIMED_OUT},
{ IP_BAD_REQ, PING_BAD_REQ},
{ IP_BAD_ROUTE, PING_BAD_ROUTE},
{ IP_TTL_EXPIRED_TRANSIT, PING_TTL_EXPIRED_TRANSIT},
{ IP_TTL_EXPIRED_REASSEM, PING_TTL_EXPIRED_REASSEM},
{ IP_PARAM_PROBLEM, PING_PARAM_PROBLEM},
{ IP_SOURCE_QUENCH, PING_SOURCE_QUENCH},
{ IP_OPTION_TOO_BIG, PING_OPTION_TOO_BIG},
{ IP_BAD_DESTINATION, PING_BAD_DESTINATION},
{ IP_NEGOTIATING_IPSEC, PING_NEGOTIATING_IPSEC},
{ IP_GENERAL_FAILURE, PING_GENERAL_FAILURE}
};
#endif // 0
UINT
NLBHost::mfn_ping(
VOID
)
{
UINT Status = ERROR_SUCCESS;
LONG inaddr;
char rgchBindString[1024];
mfn_Log(L"NLBHost -- pinging (%s).", (LPCWSTR) m_BindString);
//
// Convert to ANSI.
//
//
// Resolve to an IP address...
//
inaddr = inet_addr(m_BindString);
if (inaddr == -1L)
{
struct hostent *hostp = NULL;
hostp = gethostbyname(m_BindString);
if (hostp) {
unsigned char *pc = (unsigned char *) & inaddr;
// If we find a host entry, set up the internet address
inaddr = *(long *)hostp->h_addr;
mfn_Log(
L"NLBHost -- resolved to IP address %d.%d.%d.%d.",
pc[0],
pc[1],
pc[2],
pc[3]
);
} else {
// Neither dotted, not name.
Status = WSAGetLastError();
mfn_Log(L"NLBHost -- could not resolve bind address.");
goto end;
}
}
//
// Send Icmp echo.
//
HANDLE IcmpHandle;
IcmpHandle = IcmpCreateFile();
if (IcmpHandle == INVALID_HANDLE_VALUE) {
Status = GetLastError();
mfn_Log(L"Unable to contact IP driver, error code %d.",Status);
goto end;
}
const int Count = 4;
const int Timeout = 1000;
const int MinInterval = 500;
for (int i = 0; i < Count; i++)
{
static BYTE SendBuffer[32];
BYTE RcvBuffer[1024];
int numberOfReplies;
numberOfReplies = IcmpSendEcho2(IcmpHandle,
0,
NULL,
NULL,
inaddr,
SendBuffer,
sizeof(SendBuffer),
NULL,
RcvBuffer,
sizeof(RcvBuffer),
Timeout
);
if (numberOfReplies == 0) {
int errorCode = GetLastError();
mfn_Log(L"ICMP Error %d", errorCode );
// TODO: look at ping sources for proper error reporting
// (host unreachable, etc...)
if (i < (Count - 1)) {
Sleep(MinInterval);
}
}
else
{
mfn_Log(L"Ping succeeded.");
Status = ERROR_SUCCESS;
break;
}
}
end:
return Status;
}