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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_BASE_WINPING_H__
#define WEBRTC_BASE_WINPING_H__
#if defined(WEBRTC_WIN)
#include "webrtc/base/win32.h"
#include "webrtc/base/basictypes.h"
#include "webrtc/base/ipaddress.h"
namespace rtc {
// This class wraps a Win32 API for doing ICMP pinging. This API, unlike the
// the normal socket APIs (as implemented on Win9x), will return an error if
// an ICMP packet with the dont-fragment bit set is too large. This means this
// class can be used to detect the MTU to a given address.
typedef struct ip_option_information {
UCHAR Ttl; // Time To Live
UCHAR Tos; // Type Of Service
UCHAR Flags; // IP header flags
UCHAR OptionsSize; // Size in bytes of options data
PUCHAR OptionsData; // Pointer to options data
} IP_OPTION_INFORMATION, * PIP_OPTION_INFORMATION;
typedef HANDLE (WINAPI *PIcmpCreateFile)();
typedef BOOL (WINAPI *PIcmpCloseHandle)(HANDLE icmp_handle);
typedef HANDLE (WINAPI *PIcmp6CreateFile)();
typedef BOOL (WINAPI *PIcmp6CloseHandle)(HANDLE icmp_handle);
typedef DWORD (WINAPI *PIcmpSendEcho)(
HANDLE IcmpHandle,
ULONG DestinationAddress,
LPVOID RequestData,
WORD RequestSize,
PIP_OPTION_INFORMATION RequestOptions,
LPVOID ReplyBuffer,
DWORD ReplySize,
DWORD Timeout);
typedef DWORD (WINAPI *PIcmp6SendEcho2)(
HANDLE IcmpHandle,
HANDLE Event,
FARPROC ApcRoutine,
PVOID ApcContext,
struct sockaddr_in6 *SourceAddress,
struct sockaddr_in6 *DestinationAddress,
LPVOID RequestData,
WORD RequestSize,
PIP_OPTION_INFORMATION RequestOptions,
LPVOID ReplyBuffer,
DWORD ReplySize,
DWORD Timeout
);
class WinPing {
public:
WinPing();
~WinPing();
// Determines whether the class was initialized correctly.
bool IsValid() { return valid_; }
// Attempts to send a ping with the given parameters.
enum PingResult { PING_FAIL, PING_INVALID_PARAMS,
PING_TOO_LARGE, PING_TIMEOUT, PING_SUCCESS };
PingResult Ping(IPAddress ip,
uint32_t data_size,
uint32_t timeout_millis,
uint8_t ttl,
bool allow_fragments);
private:
HMODULE dll_;
HANDLE hping_;
HANDLE hping6_;
PIcmpCreateFile create_;
PIcmpCloseHandle close_;
PIcmpSendEcho send_;
PIcmp6CreateFile create6_;
PIcmp6SendEcho2 send6_;
char* data_;
uint32_t dlen_;
char* reply_;
uint32_t rlen_;
bool valid_;
};
} // namespace rtc
#endif // WEBRTC_WIN
#endif // WEBRTC_BASE_WINPING_H__
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