/*

    mtr  --  a network diagnostic tool

    Copyright (C) 2016  Matt Kimball

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License version 2 as

    published by the Free Software Foundation.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef PROBE_CYGWIN_H

#define PROBE_CYGWIN_H

#include <arpa/inet.h>

#include <windows.h>

#include <iphlpapi.h>

#include <icmpapi.h>

/*

    This should be in the Windows headers, but is missing from

    Cygwin's Windows headers.

*/

typedef struct icmpv6_echo_reply_lh {

    /*

       Although Windows uses an IPV6_ADDRESS_EX here, we are using uint8_t

       fields to avoid structure padding differences between gcc and

       Visual C++.  (gcc wants to align the flow info to a 4 byte boundary,

       and Windows uses it unaligned.)

     */

    uint8_t PortBits[2];

    uint8_t FlowInfoBits[4];

    uint8_t AddressBits[16];

    uint8_t ScopeIdBits[4];

    ULONG Status;

    unsigned int RoundTripTime;

} ICMPV6_ECHO_REPLY,

*PICMPV6_ECHO_REPLY;

/*

	Windows requires an echo reply structure for each in-flight

	ICMP probe.

*/

struct probe_platform_t {

    /*

       We need a backpointer to the net_state because of the way

       IcmpSendEcho2 passes our context.

     */

    struct net_state_t *net_state;

    /*  IP version (4 or 6) used for the probe  */

    int ip_version;

    union {

        ICMP_ECHO_REPLY32 *reply4;

        ICMPV6_ECHO_REPLY *reply6;

    };

};

/*  A Windows HANDLE for the ICMP session  */

struct net_state_platform_t {

    HANDLE icmp4;

    HANDLE icmp6;

};

#endif