write a minidump if ziti-edge-tunnel crashes on windows

[dovholuknf]

writes a mini crash dump with thread info file on unhandled exceptions

[dovholuknf]

tested by adding this to static void WINAPI if_change_cb(PVOID CallerContext, PMIB_IPINTERFACE_ROW Row, MIB_NOTIFICATION_TYPE NotificationType) {:

        int* p = NULL;
        *p = 42;

After execution you see this is stdout:

minidump created at: D:\git\github\openziti\ziti-tunnel-sdk-c\build\cwdming\programs\ziti-edge-tunnel\logs\service\ziti-edge-tunnel.crash.dmp

Open the dmp with WinDbg and run !analyze -v and useful output pops out:

STACK_TEXT:  
000000c5`7c5ff0c0 00007fff`03b62b39     : 00000283`61333620 00000000`00000000 00000283`00000003 00000283`5f327710 : ziti_edge_tunnel!if_change_cb+0x108
000000c5`7c5ff2d0 00007fff`03b61390     : 00007fff`053ea5f0 00000000`00000002 00000283`5f33da10 00000000`00000002 : winnsi!NsiRpcRegisterChangeNotificationEx+0x1619
000000c5`7c5ff470 00007fff`053e2cfe     : 00000283`5f33dda0 00000000`00000000 00000283`5f33da10 00000283`5f33db01 : winnsi!NsiRpcRegisterChangeNotification+0x60
000000c5`7c5ff4f0 00007fff`053e2e84     : 00000283`5f33da10 00000283`61333620 00000000`00000002 00007ff7`b898bcca : IPHLPAPI!InternalRegisterChangeNotification+0x9a
000000c5`7c5ff550 00007ff7`b898b099     : 00000000`0000000a 000000c5`7c5ff610 00000000`00000000 00000000`00000000 : IPHLPAPI!NotifyIpInterfaceChange+0xc4
000000c5`7c5ff590 00007ff7`b8984dcf     : 00007ff7`b91a5200 00000000`01004064 000000c5`7c5ff960 000000c5`7c5ff9a0 : ziti_edge_tunnel!tun_open+0x442
000000c5`7c5ff7b0 00007ff7`b8986f27     : 00007ff7`b91a5200 00000000`01004064 00007ff7`02004064 00000283`61333dd0 : ziti_edge_tunnel!run_tunnel+0x105
000000c5`7c5ffa30 00007ff7`b89856a3     : 000000c5`00000000 00000283`5f732560 000000c5`7c5ffb90 00007ff7`b8985c6e : ziti_edge_tunnel!run+0x793
000000c5`7c5ffb40 00007ff7`b8985753     : 00007ff7`b8fdf320 00007ff7`00000000 00000283`5f732560 00000000`00000427 : ziti_edge_tunnel!commandline_run+0x121
000000c5`7c5ffba0 00007ff7`b8989fbc     : 00007ff7`b8fdf0e0 00000000`00000003 00000283`5f732548 00000004`00000000 : ziti_edge_tunnel!commandline_run+0x1d1
000000c5`7c5ffc00 00007ff7`b8981340     : 00007ff7`00000004 00000283`5f732540 00000000`00000000 00000000`00000000 : ziti_edge_tunnel!main+0xe3
000000c5`7c5ffc40 00007ff7`b8981146     : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ziti_edge_tunnel+0x1340
000000c5`7c5ffcc0 00007fff`0782259d     : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ziti_edge_tunnel+0x1146
000000c5`7c5ffd00 00007fff`0970af38     : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0x1d
000000c5`7c5ffd30 00000000`00000000     : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x28


STACK_COMMAND:  ~0s; .ecxr ; kb

FAULTING_SOURCE_LINE:  D:/git/github/openziti/ziti-tunnel-sdk-c/programs/ziti-edge-tunnel/netif_driver/windows/tun.c

FAULTING_SOURCE_FILE:  D:/git/github/openziti/ziti-tunnel-sdk-c/programs/ziti-edge-tunnel/netif_driver/windows/tun.c

FAULTING_SOURCE_LINE_NUMBER:  450

FAULTING_SOURCE_CODE:  
   446:     int rc = GetIpForwardEntry2(&rt);
   447:     if (rc == NO_ERROR) {
   448: 
   449:     int* p = NULL;
>  450:     *p = 42;
   451: 
   452:         if (default_rt.InterfaceIndex != rt.InterfaceIndex) {
   453:             ZITI_LOG(INFO, "default route is now via if_idx[%d]", rt.InterfaceIndex);
   454:             default_rt.InterfaceIndex = rt.InterfaceIndex;
   455:             default_rt.InterfaceLuid = rt.InterfaceLuid;