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      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 #include "talk/base/IPAddress.h"
     36 
     37 namespace talk_base {
     38 
     39 // This class wraps a Win32 API for doing ICMP pinging.  This API, unlike the
     40 // the normal socket APIs (as implemented on Win9x), will return an error if
     41 // an ICMP packet with the dont-fragment bit set is too large.  This means this
     42 // class can be used to detect the MTU to a given address.
     43 
     44 typedef struct ip_option_information {
     45     UCHAR   Ttl;                // Time To Live
     46     UCHAR   Tos;                // Type Of Service
     47     UCHAR   Flags;              // IP header flags
     48     UCHAR   OptionsSize;        // Size in bytes of options data
     49     PUCHAR  OptionsData;        // Pointer to options data
     50 } IP_OPTION_INFORMATION, * PIP_OPTION_INFORMATION;
     51 
     52 typedef HANDLE (WINAPI *PIcmpCreateFile)();
     53 
     54 typedef BOOL (WINAPI *PIcmpCloseHandle)(HANDLE icmp_handle);
     55 
     56 typedef HANDLE (WINAPI *PIcmp6CreateFile)();
     57 
     58 typedef BOOL (WINAPI *PIcmp6CloseHandle)(HANDLE icmp_handle);
     59 
     60 typedef DWORD (WINAPI *PIcmpSendEcho)(
     61     HANDLE                   IcmpHandle,
     62     ULONG                    DestinationAddress,
     63     LPVOID                   RequestData,
     64     WORD                     RequestSize,
     65     PIP_OPTION_INFORMATION   RequestOptions,
     66     LPVOID                   ReplyBuffer,
     67     DWORD                    ReplySize,
     68     DWORD                    Timeout);
     69 
     70 typedef DWORD (WINAPI *PIcmp6SendEcho2)(
     71     HANDLE IcmpHandle,
     72     HANDLE Event,
     73     FARPROC ApcRoutine,
     74     PVOID ApcContext,
     75     struct sockaddr_in6 *SourceAddress,
     76     struct sockaddr_in6 *DestinationAddress,
     77     LPVOID RequestData,
     78     WORD RequestSize,
     79     PIP_OPTION_INFORMATION RequestOptions,
     80     LPVOID ReplyBuffer,
     81     DWORD ReplySize,
     82     DWORD Timeout
     83 );
     84 
     85 class WinPing {
     86 public:
     87     WinPing();
     88     ~WinPing();
     89 
     90     // Determines whether the class was initialized correctly.
     91     bool IsValid() { return valid_; }
     92 
     93     // Attempts to send a ping with the given parameters.
     94     enum PingResult { PING_FAIL, PING_INVALID_PARAMS,
     95                       PING_TOO_LARGE, PING_TIMEOUT, PING_SUCCESS };
     96     PingResult Ping(
     97         IPAddress ip, uint32 data_size, uint32 timeout_millis, uint8 ttl,
     98         bool allow_fragments);
     99 
    100 private:
    101     HMODULE dll_;
    102     HANDLE hping_;
    103     HANDLE hping6_;
    104     PIcmpCreateFile create_;
    105     PIcmpCloseHandle close_;
    106     PIcmpSendEcho send_;
    107     PIcmp6CreateFile create6_;
    108     PIcmp6SendEcho2 send6_;
    109     char* data_;
    110     uint32 dlen_;
    111     char* reply_;
    112     uint32 rlen_;
    113     bool valid_;
    114 };
    115 
    116 } // namespace talk_base
    117 
    118 #endif // WIN32
    119 
    120 #endif // TALK_BASE_WINPING_H__
    121