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mtr 0.94

    1: /*
    2:     mtr  --  a network diagnostic tool
    3:     Copyright (C) 2016  Matt Kimball
    4: 
    5:     This program is free software; you can redistribute it and/or modify
    6:     it under the terms of the GNU General Public License version 2 as
    7:     published by the Free Software Foundation.
    8: 
    9:     This program is distributed in the hope that it will be useful,
   10:     but WITHOUT ANY WARRANTY; without even the implied warranty of
   11:     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   12:     GNU General Public License for more details.
   13: 
   14:     You should have received a copy of the GNU General Public License along
   15:     with this program; if not, write to the Free Software Foundation, Inc.,
   16:     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   17: */
   18: 
   19: #ifndef PROBE_CYGWIN_H
   20: #define PROBE_CYGWIN_H
   21: 
   22: #include <arpa/inet.h>
   23: #include <windows.h>
   24: #include <iphlpapi.h>
   25: #include <icmpapi.h>
   26: 
   27: /*
   28:     This should be in the Windows headers, but is missing from
   29:     Cygwin's Windows headers.
   30: */
   31: typedef struct icmpv6_echo_reply_lh {
   32:     /*
   33:        Although Windows uses an IPV6_ADDRESS_EX here, we are using uint8_t
   34:        fields to avoid structure padding differences between gcc and
   35:        Visual C++.  (gcc wants to align the flow info to a 4 byte boundary,
   36:        and Windows uses it unaligned.)
   37:      */
   38:     uint8_t PortBits[2];
   39:     uint8_t FlowInfoBits[4];
   40:     uint8_t AddressBits[16];
   41:     uint8_t ScopeIdBits[4];
   42: 
   43:     ULONG Status;
   44:     unsigned int RoundTripTime;
   45: } ICMPV6_ECHO_REPLY,
   46: *PICMPV6_ECHO_REPLY;
   47: 
   48: /*
   49: 	Windows requires an echo reply structure for each in-flight
   50: 	ICMP probe.
   51: */
   52: struct probe_platform_t {
   53:     /*
   54:        We need a backpointer to the net_state because of the way
   55:        IcmpSendEcho2 passes our context.
   56:      */
   57:     struct net_state_t *net_state;
   58: 
   59:     /*  IP version (4 or 6) used for the probe  */
   60:     int ip_version;
   61: };
   62: 
   63: /*  A Windows HANDLE for the ICMP session  */
   64: struct net_state_platform_t {
   65:     HANDLE icmp4;
   66:     HANDLE icmp6;
   67:     bool ip4_socket_raw;
   68:     bool ip6_socket_raw;
   69: 
   70:     HANDLE thread_in_pipe_read_handle;
   71:     int thread_in_pipe_read, thread_in_pipe_write;
   72:     int thread_out_pipe_read, thread_out_pipe_write;
   73: };
   74: 
   75: /*
   76:     A request object passed between the main thread and the ICMP
   77:     service thread representing an outstanding probe.
   78: */
   79: struct icmp_thread_request_t {
   80:     /*
   81:         net_state and probe are const to avoid race conditions between
   82:         the main thread and the ICMP service thread.  They are to be
   83:         considered read-only on the ICMP service thread.
   84:     */
   85:     const struct net_state_t *net_state;
   86:     const struct probe_t *probe;
   87: 
   88:     /*  Parameters for the probe request  */
   89:     int ip_version;
   90:     int ttl;
   91:     int timeout;
   92:     int packet_size;
   93:     int bit_pattern;
   94: 
   95:     /*  Source and destination for the probe  */
   96:     struct sockaddr_storage dest_sockaddr;
   97:     struct sockaddr_storage src_sockaddr;
   98: 
   99:     /*  Scratch space used by the ICMP.DLL API  */
  100:     union {
  101:         ICMP_ECHO_REPLY *reply4;
  102:         ICMPV6_ECHO_REPLY *reply6;
  103:     };
  104: 
  105:     /*  Probe results  */
  106:     int icmp_type;
  107:     int reply_status;
  108:     int round_trip_us;
  109: 
  110:     /*  The remote address responding to the probe  */
  111:     struct sockaddr_storage remote_addr;
  112: };
  113: 
  114: #endif