426 lines
11 KiB
C
426 lines
11 KiB
C
/*
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* Unix interface for libresolv
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*
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* Copyright 2021 Hans Leidekker for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#if 0
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#pragma makedep unix
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#endif
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#include "config.h"
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#ifdef HAVE_RESOLV
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#include <stdarg.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#ifdef HAVE_ARPA_NAMESER_H
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# include <arpa/nameser.h>
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#endif
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#ifdef HAVE_RESOLV_H
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# include <resolv.h>
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#endif
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#ifdef HAVE_NETDB_H
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# include <netdb.h>
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#endif
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "winbase.h"
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#include "windns.h"
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#define USE_WS_PREFIX
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#include "ws2def.h"
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#include "ws2ipdef.h"
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#include "wine/debug.h"
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#include "dnsapi.h"
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WINE_DEFAULT_DEBUG_CHANNEL(dnsapi);
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/* call res_init() just once because of a bug in Mac OS X 10.4 */
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/* call once per thread on systems that have per-thread _res */
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static void init_resolver( void )
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{
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if (!(_res.options & RES_INIT)) res_init();
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}
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static unsigned long map_options( DWORD options )
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{
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unsigned long ret = 0;
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if (options == DNS_QUERY_STANDARD)
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return RES_DEFAULT;
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if (options & DNS_QUERY_ACCEPT_TRUNCATED_RESPONSE)
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ret |= RES_IGNTC;
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if (options & DNS_QUERY_USE_TCP_ONLY)
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ret |= RES_USEVC;
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if (options & DNS_QUERY_NO_RECURSION)
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ret &= ~RES_RECURSE;
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if (options & DNS_QUERY_NO_LOCAL_NAME)
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ret &= ~RES_DNSRCH;
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if (options & DNS_QUERY_NO_HOSTS_FILE)
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ret |= RES_NOALIASES;
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if (options & DNS_QUERY_TREAT_AS_FQDN)
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ret &= ~RES_DEFNAMES;
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if (options & DNS_QUERY_DONT_RESET_TTL_VALUES)
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FIXME( "option DNS_QUERY_DONT_RESET_TTL_VALUES not implemented\n" );
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if (options & DNS_QUERY_RESERVED)
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FIXME( "option DNS_QUERY_RESERVED not implemented\n" );
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if (options & DNS_QUERY_WIRE_ONLY)
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FIXME( "option DNS_QUERY_WIRE_ONLY not implemented\n" );
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if (options & DNS_QUERY_NO_WIRE_QUERY)
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FIXME( "option DNS_QUERY_NO_WIRE_QUERY not implemented\n" );
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if (options & DNS_QUERY_BYPASS_CACHE)
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FIXME( "option DNS_QUERY_BYPASS_CACHE not implemented\n" );
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if (options & DNS_QUERY_RETURN_MESSAGE)
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FIXME( "option DNS_QUERY_RETURN_MESSAGE not implemented\n" );
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if (options & DNS_QUERY_NO_NETBT)
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TRACE( "netbios query disabled\n" );
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return ret;
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}
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static DNS_STATUS map_h_errno( int error )
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{
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switch (error)
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{
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case NO_DATA:
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case HOST_NOT_FOUND: return DNS_ERROR_RCODE_NAME_ERROR;
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case TRY_AGAIN: return DNS_ERROR_RCODE_SERVER_FAILURE;
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case NO_RECOVERY: return DNS_ERROR_RCODE_REFUSED;
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#ifdef NETDB_INTERNAL
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case NETDB_INTERNAL: return DNS_ERROR_RCODE;
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#endif
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default:
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FIXME( "unmapped error code: %d\n", error );
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return DNS_ERROR_RCODE_NOT_IMPLEMENTED;
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}
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}
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static NTSTATUS resolv_get_searchlist( void *args )
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{
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const struct get_searchlist_params *params = args;
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DNS_TXT_DATAW *list = params->list;
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DWORD i, needed, str_needed = 0;
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char *ptr, *end;
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init_resolver();
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for (i = 0; i < MAXDNSRCH + 1 && _res.dnsrch[i]; i++)
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str_needed += (strlen(_res.dnsrch[i]) + 1) * sizeof(WCHAR);
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needed = FIELD_OFFSET(DNS_TXT_DATAW, pStringArray[i]) + str_needed;
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if (!list || *params->len < needed)
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{
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*params->len = needed;
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return !list ? ERROR_SUCCESS : ERROR_MORE_DATA;
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}
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*params->len = needed;
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list->dwStringCount = i;
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ptr = (char *)(list->pStringArray + i);
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end = ptr + str_needed;
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for (i = 0; i < MAXDNSRCH + 1 && _res.dnsrch[i]; i++)
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{
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list->pStringArray[i] = (WCHAR *)ptr;
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ptr += ntdll_umbstowcs( _res.dnsrch[i], strlen(_res.dnsrch[i]) + 1,
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list->pStringArray[i], end - ptr );
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}
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return ERROR_SUCCESS;
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}
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static inline int filter( unsigned short sin_family, USHORT family )
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{
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if (sin_family != AF_INET && sin_family != AF_INET6) return TRUE;
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if (sin_family == AF_INET6 && family == WS_AF_INET) return TRUE;
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if (sin_family == AF_INET && family == WS_AF_INET6) return TRUE;
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return FALSE;
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}
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#ifdef HAVE_RES_GETSERVERS
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static NTSTATUS resolv_get_serverlist( void *args )
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{
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const struct get_serverlist_params *params = args;
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DNS_ADDR_ARRAY *addrs = params->addrs;
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struct __res_state *state = &_res;
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DWORD i, found, total, needed;
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union res_sockaddr_union *buf;
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init_resolver();
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total = res_getservers( state, NULL, 0 );
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if (!total) return DNS_ERROR_NO_DNS_SERVERS;
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if (!addrs && params->family != WS_AF_INET && params->family != WS_AF_INET6)
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{
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*params->len = FIELD_OFFSET(DNS_ADDR_ARRAY, AddrArray[total]);
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return ERROR_SUCCESS;
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}
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buf = malloc( total * sizeof(union res_sockaddr_union) );
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if (!buf) return ERROR_NOT_ENOUGH_MEMORY;
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total = res_getservers( state, buf, total );
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for (i = 0, found = 0; i < total; i++)
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{
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if (filter( buf[i].sin.sin_family, params->family )) continue;
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found++;
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}
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if (!found) return DNS_ERROR_NO_DNS_SERVERS;
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needed = FIELD_OFFSET(DNS_ADDR_ARRAY, AddrArray[found]);
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if (!addrs || *params->len < needed)
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{
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*params->len = needed;
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return !addrs ? ERROR_SUCCESS : ERROR_MORE_DATA;
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}
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*params->len = needed;
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memset( addrs, 0, needed );
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addrs->AddrCount = addrs->MaxCount = found;
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for (i = 0, found = 0; i < total; i++)
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{
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if (filter( buf[i].sin.sin_family, params->family )) continue;
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if (buf[i].sin6.sin6_family == AF_INET6)
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{
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SOCKADDR_IN6 *sa = (SOCKADDR_IN6 *)addrs->AddrArray[found].MaxSa;
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sa->sin6_family = WS_AF_INET6;
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memcpy( &sa->sin6_addr, &buf[i].sin6.sin6_addr, sizeof(sa->sin6_addr) );
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addrs->AddrArray[found].Data.DnsAddrUserDword[0] = sizeof(*sa);
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}
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else
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{
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SOCKADDR_IN *sa = (SOCKADDR_IN *)addrs->AddrArray[found].MaxSa;
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sa->sin_family = WS_AF_INET;
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sa->sin_addr.WS_s_addr = buf[i].sin.sin_addr.s_addr;
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addrs->AddrArray[found].Data.DnsAddrUserDword[0] = sizeof(*sa);
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}
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found++;
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}
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free( buf );
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return ERROR_SUCCESS;
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}
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#else
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static NTSTATUS resolv_get_serverlist( void *args )
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{
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const struct get_serverlist_params *params = args;
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DNS_ADDR_ARRAY *addrs = params->addrs;
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DWORD needed, found, i;
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init_resolver();
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if (!_res.nscount) return DNS_ERROR_NO_DNS_SERVERS;
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if (!addrs && params->family != WS_AF_INET && params->family != WS_AF_INET6)
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{
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*params->len = FIELD_OFFSET(DNS_ADDR_ARRAY, AddrArray[_res.nscount]);
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return ERROR_SUCCESS;
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}
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for (i = 0, found = 0; i < _res.nscount; i++)
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{
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unsigned short sin_family = AF_INET;
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#ifdef HAVE_STRUCT___RES_STATE__U__EXT_NSCOUNT6
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if (_res._u._ext.nsaddrs[i]) sin_family = _res._u._ext.nsaddrs[i]->sin6_family;
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#endif
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if (filter( sin_family, params->family )) continue;
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found++;
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}
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if (!found) return DNS_ERROR_NO_DNS_SERVERS;
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needed = FIELD_OFFSET(DNS_ADDR_ARRAY, AddrArray[found]);
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if (!addrs || *params->len < needed)
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{
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*params->len = needed;
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return !addrs ? ERROR_SUCCESS : ERROR_MORE_DATA;
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}
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*params->len = needed;
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memset( addrs, 0, needed );
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addrs->AddrCount = addrs->MaxCount = found;
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for (i = 0, found = 0; i < _res.nscount; i++)
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{
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unsigned short sin_family = AF_INET;
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#ifdef HAVE_STRUCT___RES_STATE__U__EXT_NSCOUNT6
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if (_res._u._ext.nsaddrs[i]) sin_family = _res._u._ext.nsaddrs[i]->sin6_family;
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#endif
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if (filter( sin_family, params->family )) continue;
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#ifdef HAVE_STRUCT___RES_STATE__U__EXT_NSCOUNT6
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if (sin_family == AF_INET6)
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{
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SOCKADDR_IN6 *sa = (SOCKADDR_IN6 *)addrs->AddrArray[found].MaxSa;
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sa->sin6_family = WS_AF_INET6;
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memcpy( &sa->sin6_addr, &_res._u._ext.nsaddrs[i]->sin6_addr, sizeof(sa->sin6_addr) );
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addrs->AddrArray[found].Data.DnsAddrUserDword[0] = sizeof(*sa);
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}
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else
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#endif
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{
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SOCKADDR_IN *sa = (SOCKADDR_IN *)addrs->AddrArray[found].MaxSa;
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sa->sin_family = WS_AF_INET;
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sa->sin_addr.WS_s_addr = _res.nsaddr_list[i].sin_addr.s_addr;
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addrs->AddrArray[found].Data.DnsAddrUserDword[0] = sizeof(*sa);
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}
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found++;
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}
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return ERROR_SUCCESS;
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}
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#endif
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static NTSTATUS resolv_set_serverlist( void *args )
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{
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const IP4_ARRAY *addrs = args;
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int i;
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init_resolver();
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if (!addrs || !addrs->AddrCount) return ERROR_SUCCESS;
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if (addrs->AddrCount > MAXNS)
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{
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WARN( "too many servers: %d only using the first: %d\n",
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addrs->AddrCount, MAXNS );
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_res.nscount = MAXNS;
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}
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else _res.nscount = addrs->AddrCount;
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for (i = 0; i < _res.nscount; i++)
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_res.nsaddr_list[i].sin_addr.s_addr = addrs->AddrArray[i];
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return ERROR_SUCCESS;
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}
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static NTSTATUS resolv_query( void *args )
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{
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const struct query_params *params = args;
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DNS_STATUS ret = ERROR_SUCCESS;
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int len;
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init_resolver();
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_res.options |= map_options( params->options );
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if ((len = res_query( params->name, ns_c_in, params->type, params->buf, *params->len )) < 0)
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ret = map_h_errno( h_errno );
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else
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*params->len = len;
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return ret;
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}
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const unixlib_entry_t __wine_unix_call_funcs[] =
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{
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resolv_get_searchlist,
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resolv_get_serverlist,
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resolv_set_serverlist,
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resolv_query,
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};
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#ifdef _WIN64
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typedef ULONG PTR32;
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static NTSTATUS wow64_resolv_get_searchlist( void *args )
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{
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struct
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{
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PTR32 list;
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PTR32 len;
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} const *params32 = args;
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struct get_searchlist_params params =
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{
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ULongToPtr(params32->list),
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ULongToPtr(params32->len)
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};
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return resolv_get_searchlist( ¶ms );
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}
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static NTSTATUS wow64_resolv_get_serverlist( void *args )
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{
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struct
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{
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USHORT family;
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PTR32 addrs;
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PTR32 len;
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} const *params32 = args;
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struct get_serverlist_params params =
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{
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params32->family,
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ULongToPtr(params32->addrs),
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ULongToPtr(params32->len)
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};
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return resolv_get_serverlist( ¶ms );
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}
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static NTSTATUS wow64_resolv_query( void *args )
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{
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struct
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{
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PTR32 name;
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WORD type;
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DWORD options;
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PTR32 buf;
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PTR32 len;
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} const *params32 = args;
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struct query_params params =
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{
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ULongToPtr(params32->name),
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params32->type,
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params32->options,
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ULongToPtr(params32->buf),
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ULongToPtr(params32->len)
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};
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return resolv_query( ¶ms );
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}
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const unixlib_entry_t __wine_unix_call_wow64_funcs[] =
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{
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wow64_resolv_get_searchlist,
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wow64_resolv_get_serverlist,
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resolv_set_serverlist,
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wow64_resolv_query,
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};
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#endif /* _WIN64 */
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#endif /* HAVE_RESOLV */
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