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path: root/src/gns/w32nsp-resolve.c
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/*
     This file is part of GNUnet.
     Copyright (C) 2012 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     or (at your option) any later version.

     GNUnet 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
     Affero General Public License for more details.

     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
 */
/**
 * @file gns/w32nsp-resolve.c
 * @brief W32 integration for GNS
 * @author LRN
 */
/* Instead of including gnunet_common.h */
#define GNUNET_memcpy(dst, src, n) do { if (0 != n) { (void)memcpy(dst, src, n); } } while (0)

#include <ws2tcpip.h>
#include <windows.h>
#include <nspapi.h>
#include <ws2spi.h>
#include <nspapi.h>
#include <initguid.h>
#include "gnunet_w32nsp_lib.h"
#include <stdio.h>

typedef int (WSPAPI *LPNSPSTARTUP)(LPGUID lpProviderId, LPNSP_ROUTINE lpnspRoutines);

GUID host = { 0x0002a800, 0, 0, { 0xC0, 0, 0, 0, 0, 0, 0, 0x46 } };
GUID ip4 = { 0x00090035, 0, 1, { 0xc0, 0, 0, 0, 0, 0, 0, 0x046 } };
GUID ip6 = { 0x00090035, 0, 0x001c, { 0xc0, 0, 0, 0, 0, 0, 0, 0x046 } };

DEFINE_GUID(W32_DNS, 0x22059D40, 0x7E9E, 0x11CF, 0xAE, 0x5A, 0x00, 0xAA, 0x00, 0xA7, 0x11, 0x2B);

#define DEFINE_DNS_GUID(a, x) DEFINE_GUID(a, 0x00090035, 0x0000, x, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46)
DEFINE_DNS_GUID(SVCID_DNS_TYPE_A, 0x0001);
DEFINE_DNS_GUID(SVCID_DNS_TYPE_NS, 0x0002);
DEFINE_DNS_GUID(SVCID_DNS_TYPE_CNAME, 0x0005);
DEFINE_DNS_GUID(SVCID_DNS_TYPE_SOA, 0x0006);
DEFINE_DNS_GUID(SVCID_DNS_TYPE_PTR, 0x000c);
DEFINE_DNS_GUID(SVCID_DNS_TYPE_MX, 0x000f);
DEFINE_DNS_GUID(SVCID_DNS_TYPE_TEXT, 0x0010);
DEFINE_DNS_GUID(SVCID_DNS_TYPE_AAAA, 0x001c);
DEFINE_DNS_GUID(SVCID_DNS_TYPE_SRV, 0x0021);
DEFINE_GUID(SVCID_HOSTNAME, 0x0002a800, 0x0000, 0x0000, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46);
DEFINE_GUID(SVCID_INET_HOSTADDRBYNAME, 0x0002a803, 0x0000, 0x0000, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46);

//
// Utility to turn a list of offsets into a list of addresses. Used
// to convert structures returned as BLOBs.
//

VOID
FixList(PCHAR ** List, PCHAR Base)
{
  if (*List)
    {
      PCHAR * Addr;

      Addr = *List = (PCHAR *)(((DWORD)*List + Base));
      while (*Addr)
        {
          *Addr = (PCHAR)(((DWORD)*Addr + Base));
          Addr++;
        }
    }
}


//
// Routine to convert a hostent returned in a BLOB to one with
// usable pointers. The structure is converted in-place.
//
VOID
UnpackHostEnt(struct hostent * hostent)
{
  PCHAR pch;

  pch = (PCHAR)hostent;

  if (hostent->h_name)
    {
      hostent->h_name = (PCHAR)((DWORD)hostent->h_name + pch);
    }
  FixList(&hostent->h_aliases, pch);
  FixList(&hostent->h_addr_list, pch);
}


static void
print_hostent(struct hostent *he)
{
  int i;
  char **pAlias;

  printf("\tOfficial name: %s\n", he->h_name);
  for (i = 0, pAlias = he->h_aliases; *pAlias != 0; pAlias++)
    {
      printf("\tAlternate name #%d: %s\n", ++i, *pAlias);
    }
  printf("\tAddress type: ");
  switch (he->h_addrtype)
    {
    case AF_INET:
      printf("AF_INET\n");
      break;

    case AF_INET6:
      printf("AF_INET6\n");
      break;

    case AF_NETBIOS:
      printf("AF_NETBIOS\n");
      break;

    default:
      printf(" %d\n", he->h_addrtype);
      break;
    }
  printf("\tAddress length: %d\n", he->h_length);

  if (he->h_addrtype == AF_INET)
    {
      struct sockaddr_in addr;
      memset(&addr, 0, sizeof(addr));
      addr.sin_family = AF_INET;
      addr.sin_port = 0;
      i = 0;
      while (he->h_addr_list[i] != 0)
        {
          char buf[1024];
          DWORD buflen = 1024;
          addr.sin_addr = *(struct in_addr *)he->h_addr_list[i++];
          if (NO_ERROR == WSAAddressToStringA((LPSOCKADDR)&addr, sizeof(addr), NULL, buf, &buflen))
            printf("\tIPv4 Address #%d: %s\n", i, buf);
          else
            printf("\tIPv4 Address #%d: Can't convert: %lu\n", i, GetLastError());
        }
    }
  else if (he->h_addrtype == AF_INET6)
    {
      struct sockaddr_in6 addr;
      memset(&addr, 0, sizeof(addr));
      addr.sin6_family = AF_INET6;
      addr.sin6_port = 0;
      i = 0;
      while (he->h_addr_list[i] != 0)
        {
          char buf[1024];
          DWORD buflen = 1024;
          addr.sin6_addr = *(struct in6_addr *)he->h_addr_list[i++];
          if (NO_ERROR == WSAAddressToStringA((LPSOCKADDR)&addr, sizeof(addr), NULL, buf, &buflen))
            printf("\tIPv6 Address #%d: %s\n", i, buf);
          else
            printf("\tIPv6 Address #%d: Can't convert: %lu\n", i, GetLastError());
        }
    }
}


int
main(int argc, char **argv)
{
  int ret;
  int r = 1;
  WSADATA wsd;
  GUID prov;
  GUID sc;
  wchar_t *cmdl;
  int wargc;
  wchar_t **wargv;

  if (WSAStartup(MAKEWORD(2, 2), &wsd) != 0)
    {
      fprintf(stderr, "WSAStartup() failed: %lu\n", GetLastError());
      return 5;
    }

  cmdl = GetCommandLineW();
  if (cmdl == NULL)
    {
      WSACleanup();
      return 2;
    }
  wargv = CommandLineToArgvW(cmdl, &wargc);
  if (wargv == NULL)
    {
      WSACleanup();
      return 3;
    }
  r = 4;

  if (wargc == 5)
    {
      if (wcscmp(wargv[1], L"A") == 0)
        sc = SVCID_DNS_TYPE_A;
      else if (wcscmp(wargv[1], L"AAAA") == 0)
        sc = SVCID_DNS_TYPE_AAAA;
      else if (wcscmp(wargv[1], L"name") == 0)
        sc = SVCID_HOSTNAME;
      else if (wcscmp(wargv[1], L"addr") == 0)
        sc = SVCID_INET_HOSTADDRBYNAME;
      else
        wargc -= 1;
      if (wcscmp(wargv[4], L"mswdns") == 0)
        prov = W32_DNS;
      else if (wcscmp(wargv[4], L"gnunetdns") == 0)
        prov = GNUNET_NAMESPACE_PROVIDER_DNS;
      else
        wargc -= 1;
    }
  else if (wargc == 3)
    {
    }
  else
    {
      fprintf(stderr, "Usage: %S <record type> <service name> <NSP library path> <NSP id>\n"
              "record type      - one of the following: A | AAAA | name | addr\n"
              "service name     - a string to resolve; \" \" (a space) means 'blank'\n"
              "NSP library path - path to libw32nsp\n"
              "NSP id           - one of the following: mswdns | gnunetdns\n",
              wargv[0]);
    }

  if (wargc == 5)
    {
      HMODULE nsp;

      nsp = LoadLibraryW(wargv[3]);
      if (nsp == NULL)
        {
          fprintf(stderr, "Failed to load library `%S'\n", wargv[3]);
        }
      else
        {
          LPNSPSTARTUP startup = (LPNSPSTARTUP)GetProcAddress(nsp, "NSPStartup");
          if (startup == NULL)
            startup = (LPNSPSTARTUP)GetProcAddress(nsp, "NSPStartup@8");
          if (startup != NULL)
            {
              NSP_ROUTINE api;
              api.cbSize = sizeof(api);
              ret = startup(&prov, &api);
              if (NO_ERROR != ret)
                fprintf(stderr, "startup failed: %lu\n", GetLastError());
              else
                {
                  HANDLE lookup;
                  WSAQUERYSETW search;
                  char buf[4096];
                  WSAQUERYSETW *result = (WSAQUERYSETW *)buf;
                  DWORD resultsize;
                  DWORD err;
                  memset(&search, 0, sizeof(search));
                  search.dwSize = sizeof(search);
                  search.lpszServiceInstanceName = (wcscmp(wargv[2], L" ") == 0) ? NULL : wargv[2];
                  search.lpServiceClassId = &sc;
                  search.lpNSProviderId = &prov;
                  search.dwNameSpace = NS_ALL;
                  ret = api.NSPLookupServiceBegin(&prov, &search, NULL, LUP_RETURN_ALL, &lookup);
                  if (ret != NO_ERROR)
                    {
                      fprintf(stderr, "lookup start failed\n");
                    }
                  else
                    {
                      resultsize = 4096;
                      ret = api.NSPLookupServiceNext(lookup, LUP_RETURN_ALL, &resultsize, result);
                      err = GetLastError();
                      if (ret != NO_ERROR)
                        {
                          fprintf(stderr, "lookup next failed: %lu\n", err);
                        }
                      else
                        {
                          int i;
                          printf("Got result:\n");
                          printf("  lpszServiceInstanceName: %S\n", result->lpszServiceInstanceName ? result->lpszServiceInstanceName : L"NULL");
                          if (result->lpServiceClassId)
                            printf("  lpServiceClassId:        { 0x%08lX,0x%04X,0x%04X, { 0x%02X, 0x%02X, 0x%02X, 0x%02X, 0x%02X, 0x%02X, 0x%02X, 0x%02X } }\n",
                                   result->lpServiceClassId->Data1, result->lpServiceClassId->Data2, result->lpServiceClassId->Data3, result->lpServiceClassId->Data4[0],
                                   result->lpServiceClassId->Data4[1], result->lpServiceClassId->Data4[2], result->lpServiceClassId->Data4[3], result->lpServiceClassId->Data4[4],
                                   result->lpServiceClassId->Data4[5], result->lpServiceClassId->Data4[6], result->lpServiceClassId->Data4[7]);
                          else
                            printf("  lpServiceClassId:        NULL\n");
                          if (result->lpVersion)
                            printf("  lpVersion:               0x%08lX, %d\n", result->lpVersion->dwVersion, result->lpVersion->ecHow);
                          else
                            printf("  lpVersion:               NULL\n");
                          printf("  lpszComment:             %S\n", result->lpszComment ? result->lpszComment : L"NULL");
                          printf("  dwNameSpace:             %lu\n", result->dwNameSpace);
                          if (result->lpNSProviderId)
                            printf("  lpNSProviderId:          { 0x%08lX,0x%04X,0x%04X, { 0x%02X, 0x%02X, 0x%02X, 0x%02X, 0x%02X, 0x%02X, 0x%02X, 0x%02X } }\n",
                                   result->lpNSProviderId->Data1, result->lpNSProviderId->Data2, result->lpNSProviderId->Data3, result->lpNSProviderId->Data4[0],
                                   result->lpNSProviderId->Data4[1], result->lpNSProviderId->Data4[2], result->lpNSProviderId->Data4[3], result->lpNSProviderId->Data4[4],
                                   result->lpNSProviderId->Data4[5], result->lpNSProviderId->Data4[6], result->lpNSProviderId->Data4[7]);
                          else
                            printf("  lpNSProviderId:          NULL\n");
                          printf("  lpszContext:             %S\n", result->lpszContext ? result->lpszContext : L"NULL");
                          printf("  dwNumberOfProtocols:     %lu\n", result->dwNumberOfProtocols);
                          printf("  lpszQueryString:         %S\n", result->lpszQueryString ? result->lpszQueryString : L"NULL");
                          printf("  dwNumberOfCsAddrs:       %lu\n", result->dwNumberOfCsAddrs);
                          for (i = 0; i < result->dwNumberOfCsAddrs; i++)
                            {
                              switch (result->lpcsaBuffer[i].iSocketType)
                                {
                                case SOCK_STREAM:
                                  printf("    %d: iSocketType = SOCK_STREAM\n", i);
                                  break;

                                case SOCK_DGRAM:
                                  printf("    %d: iSocketType = SOCK_DGRAM\n", i);
                                  break;

                                default:
                                  printf("    %d: iSocketType = %d\n", i, result->lpcsaBuffer[i].iSocketType);
                                }
                              switch (result->lpcsaBuffer[i].iProtocol)
                                {
                                case IPPROTO_TCP:
                                  printf("    %d: iProtocol   = IPPROTO_TCP\n", i);
                                  break;

                                case IPPROTO_UDP:
                                  printf("    %d: iProtocol   = IPPROTO_UDP\n", i);
                                  break;

                                default:
                                  printf("    %d: iProtocol   = %d\n", i, result->lpcsaBuffer[i].iProtocol);
                                }
                              switch (result->lpcsaBuffer[i].LocalAddr.lpSockaddr->sa_family)
                                {
                                case AF_INET:
                                  printf("    %d: loc family  = AF_INET\n", i);
                                  break;

                                case AF_INET6:
                                  printf("    %d: loc family  = AF_INET6\n", i);
                                  break;

                                default:
                                  printf("    %d: loc family  = %hu\n", i, result->lpcsaBuffer[i].LocalAddr.lpSockaddr->sa_family);
                                }
                              switch (result->lpcsaBuffer[i].RemoteAddr.lpSockaddr->sa_family)
                                {
                                case AF_INET:
                                  printf("    %d: rem family  = AF_INET\n", i);
                                  break;

                                case AF_INET6:
                                  printf("    %d: rem family  = AF_INET6\n", i);
                                  break;

                                default:
                                  printf("    %d: rem family = %hu\n", i, result->lpcsaBuffer[i].RemoteAddr.lpSockaddr->sa_family);
                                }
                              char buf[1024];
                              DWORD buflen = 1024;
                              if (NO_ERROR == WSAAddressToStringA(result->lpcsaBuffer[i].LocalAddr.lpSockaddr, result->lpcsaBuffer[i].LocalAddr.iSockaddrLength, NULL, buf, &buflen))
                                printf("\tLocal Address #%d: %s\n", i, buf);
                              else
                                printf("\tLocal Address #%d: Can't convert: %lu\n", i, GetLastError());
                              buflen = 1024;
                              if (NO_ERROR == WSAAddressToStringA(result->lpcsaBuffer[i].RemoteAddr.lpSockaddr, result->lpcsaBuffer[i].RemoteAddr.iSockaddrLength, NULL, buf, &buflen))
                                printf("\tRemote Address #%d: %s\n", i, buf);
                              else
                                printf("\tRemote Address #%d: Can't convert: %lu\n", i, GetLastError());
                            }
                          printf("  dwOutputFlags:           0x%08lX\n", result->dwOutputFlags);
                          printf("  lpBlob:                  0x%p\n", result->lpBlob);
                          if (result->lpBlob)
                            {
                              struct hostent *he = malloc(result->lpBlob->cbSize);
                              if (he != NULL)
                                {
                                  GNUNET_memcpy(he, result->lpBlob->pBlobData, result->lpBlob->cbSize);
                                  UnpackHostEnt(he);
                                  print_hostent(he);
                                  free(he);
                                }
                            }
                        }
                      ret = api.NSPLookupServiceEnd(lookup);
                      if (ret != NO_ERROR)
                        printf("NSPLookupServiceEnd() failed: %lu\n", GetLastError());
                    }
                  api.NSPCleanup(&prov);
                }
            }
          FreeLibrary(nsp);
        }
    }
  else if (wargc == 3)
    {
      int s;
      ADDRINFOW hints;
      ADDRINFOW *result;
      ADDRINFOW *pos;

      memset(&hints, 0, sizeof(struct addrinfo));
      hints.ai_family = AF_UNSPEC;
      hints.ai_socktype = SOCK_STREAM;

      if (0 != (s = GetAddrInfoW(wargv[2], NULL, &hints, &result)))
        {
          fprintf(stderr, "Cound not resolve `%S' using GetAddrInfoW: %lu\n",
                  wargv[2], GetLastError());
        }
      else
        {
          for (pos = result; pos != NULL; pos = pos->ai_next)
            {
              wchar_t tmpbuf[1024];
              DWORD buflen = 1024;
              if (0 == WSAAddressToStringW(pos->ai_addr, pos->ai_addrlen, NULL, tmpbuf, &buflen))
                fprintf(stderr, "Result:\n"
                        "  flags: 0x%X\n"
                        "  family: 0x%X\n"
                        "  socktype: 0x%X\n"
                        "  protocol: 0x%X\n"
                        "  addrlen: %u\n"
                        "  addr: %S\n"
                        "  canonname: %S\n",
                        pos->ai_flags,
                        pos->ai_family,
                        pos->ai_socktype,
                        pos->ai_protocol,
                        pos->ai_addrlen,
                        tmpbuf,
                        pos->ai_canonname);
              else
                fprintf(stderr, "Result:\n"
                        "  flags: 0x%X\n"
                        "  family: 0x%X\n"
                        "  socktype: 0x%X\n"
                        "  protocol: 0x%X\n"
                        "  addrlen: %u\n"
                        "  addr: %S\n"
                        "  canonname: %S\n",
                        pos->ai_flags,
                        pos->ai_family,
                        pos->ai_socktype,
                        pos->ai_protocol,
                        pos->ai_addrlen,
                        L"<can't stringify>",
                        pos->ai_canonname);
            }
          if (NULL != result)
            FreeAddrInfoW(result);
        }
    }
  WSACleanup();
  return r;
}