1 /* 2 * libjingle 3 * Copyright 2004--2005, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_BASE_WINPING_H__ 29 #define TALK_BASE_WINPING_H__ 30 31 #ifdef WIN32 32 33 #include "talk/base/win32.h" 34 #include "talk/base/basictypes.h" 35 36 namespace talk_base { 37 38 // This class wraps a Win32 API for doing ICMP pinging. This API, unlike the 39 // the normal socket APIs (as implemented on Win9x), will return an error if 40 // an ICMP packet with the dont-fragment bit set is too large. This means this 41 // class can be used to detect the MTU to a given address. 42 43 typedef struct ip_option_information { 44 UCHAR Ttl; // Time To Live 45 UCHAR Tos; // Type Of Service 46 UCHAR Flags; // IP header flags 47 UCHAR OptionsSize; // Size in bytes of options data 48 PUCHAR OptionsData; // Pointer to options data 49 } IP_OPTION_INFORMATION, * PIP_OPTION_INFORMATION; 50 51 typedef HANDLE (WINAPI *PIcmpCreateFile)(); 52 53 typedef BOOL (WINAPI *PIcmpCloseHandle)(HANDLE icmp_handle); 54 55 typedef DWORD (WINAPI *PIcmpSendEcho)( 56 HANDLE IcmpHandle, 57 ULONG DestinationAddress, 58 LPVOID RequestData, 59 WORD RequestSize, 60 PIP_OPTION_INFORMATION RequestOptions, 61 LPVOID ReplyBuffer, 62 DWORD ReplySize, 63 DWORD Timeout); 64 65 class WinPing { 66 public: 67 WinPing(); 68 ~WinPing(); 69 70 // Determines whether the class was initialized correctly. IsValid()71 bool IsValid() { return valid_; } 72 73 // Attempts to send a ping with the given parameters. 74 enum PingResult { PING_FAIL, PING_TOO_LARGE, PING_TIMEOUT, PING_SUCCESS }; 75 PingResult Ping( 76 uint32 ip, uint32 data_size, uint32 timeout_millis, uint8 ttl, 77 bool allow_fragments); 78 79 private: 80 HMODULE dll_; 81 HANDLE hping_; 82 PIcmpCreateFile create_; 83 PIcmpCloseHandle close_; 84 PIcmpSendEcho send_; 85 char* data_; 86 uint32 dlen_; 87 char* reply_; 88 uint32 rlen_; 89 bool valid_; 90 }; 91 92 } // namespace talk_base 93 94 #endif // WIN32 95 96 #endif // TALK_BASE_WINPING_H__ 97 98