mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
170051d61e
Signed-off-by: Jeremy Allison <jra@samba.org> Reviewed-by: Noel Power <npower@samba.org>
1376 lines
33 KiB
C
1376 lines
33 KiB
C
/*
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Unix SMB/CIFS implementation.
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dsgetdcname
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Copyright (C) Gerald Carter 2006
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Copyright (C) Guenther Deschner 2007-2008
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "libsmb/dsgetdcname.h"
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#include "libsmb/namequery.h"
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#include "libads/sitename_cache.h"
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#include "../librpc/gen_ndr/ndr_netlogon.h"
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#include "libads/cldap.h"
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#include "../lib/addns/dnsquery.h"
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#include "libsmb/clidgram.h"
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#include "lib/gencache.h"
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#include "lib/util/util_net.h"
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/* 15 minutes */
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#define DSGETDCNAME_CACHE_TTL 60*15
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struct ip_service_name {
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struct samba_sockaddr sa;
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const char *hostname;
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};
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static NTSTATUS make_dc_info_from_cldap_reply(
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TALLOC_CTX *mem_ctx,
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uint32_t flags,
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const struct samba_sockaddr *sa,
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struct NETLOGON_SAM_LOGON_RESPONSE_EX *r,
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struct netr_DsRGetDCNameInfo **info);
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/****************************************************************
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****************************************************************/
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static void debug_dsdcinfo_flags(int lvl, uint32_t flags)
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{
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DEBUG(lvl,("debug_dsdcinfo_flags: 0x%08x\n\t", flags));
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if (flags & DS_FORCE_REDISCOVERY)
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DEBUGADD(lvl,("DS_FORCE_REDISCOVERY "));
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if (flags & 0x000000002)
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DEBUGADD(lvl,("0x00000002 "));
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if (flags & 0x000000004)
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DEBUGADD(lvl,("0x00000004 "));
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if (flags & 0x000000008)
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DEBUGADD(lvl,("0x00000008 "));
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if (flags & DS_DIRECTORY_SERVICE_REQUIRED)
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DEBUGADD(lvl,("DS_DIRECTORY_SERVICE_REQUIRED "));
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if (flags & DS_DIRECTORY_SERVICE_PREFERRED)
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DEBUGADD(lvl,("DS_DIRECTORY_SERVICE_PREFERRED "));
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if (flags & DS_GC_SERVER_REQUIRED)
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DEBUGADD(lvl,("DS_GC_SERVER_REQUIRED "));
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if (flags & DS_PDC_REQUIRED)
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DEBUGADD(lvl,("DS_PDC_REQUIRED "));
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if (flags & DS_BACKGROUND_ONLY)
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DEBUGADD(lvl,("DS_BACKGROUND_ONLY "));
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if (flags & DS_IP_REQUIRED)
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DEBUGADD(lvl,("DS_IP_REQUIRED "));
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if (flags & DS_KDC_REQUIRED)
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DEBUGADD(lvl,("DS_KDC_REQUIRED "));
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if (flags & DS_TIMESERV_REQUIRED)
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DEBUGADD(lvl,("DS_TIMESERV_REQUIRED "));
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if (flags & DS_WRITABLE_REQUIRED)
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DEBUGADD(lvl,("DS_WRITABLE_REQUIRED "));
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if (flags & DS_GOOD_TIMESERV_PREFERRED)
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DEBUGADD(lvl,("DS_GOOD_TIMESERV_PREFERRED "));
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if (flags & DS_AVOID_SELF)
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DEBUGADD(lvl,("DS_AVOID_SELF "));
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if (flags & DS_ONLY_LDAP_NEEDED)
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DEBUGADD(lvl,("DS_ONLY_LDAP_NEEDED "));
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if (flags & DS_IS_FLAT_NAME)
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DEBUGADD(lvl,("DS_IS_FLAT_NAME "));
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if (flags & DS_IS_DNS_NAME)
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DEBUGADD(lvl,("DS_IS_DNS_NAME "));
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if (flags & 0x00040000)
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DEBUGADD(lvl,("0x00040000 "));
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if (flags & 0x00080000)
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DEBUGADD(lvl,("0x00080000 "));
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if (flags & 0x00100000)
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DEBUGADD(lvl,("0x00100000 "));
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if (flags & 0x00200000)
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DEBUGADD(lvl,("0x00200000 "));
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if (flags & 0x00400000)
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DEBUGADD(lvl,("0x00400000 "));
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if (flags & 0x00800000)
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DEBUGADD(lvl,("0x00800000 "));
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if (flags & 0x01000000)
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DEBUGADD(lvl,("0x01000000 "));
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if (flags & 0x02000000)
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DEBUGADD(lvl,("0x02000000 "));
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if (flags & 0x04000000)
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DEBUGADD(lvl,("0x04000000 "));
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if (flags & 0x08000000)
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DEBUGADD(lvl,("0x08000000 "));
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if (flags & 0x10000000)
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DEBUGADD(lvl,("0x10000000 "));
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if (flags & 0x20000000)
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DEBUGADD(lvl,("0x20000000 "));
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if (flags & DS_RETURN_DNS_NAME)
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DEBUGADD(lvl,("DS_RETURN_DNS_NAME "));
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if (flags & DS_RETURN_FLAT_NAME)
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DEBUGADD(lvl,("DS_RETURN_FLAT_NAME "));
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if (flags)
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DEBUGADD(lvl,("\n"));
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}
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/****************************************************************
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****************************************************************/
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static char *dsgetdcname_cache_key(TALLOC_CTX *mem_ctx, const char *domain)
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{
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if (!domain) {
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return NULL;
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}
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return talloc_asprintf_strupper_m(mem_ctx, "DSGETDCNAME/DOMAIN/%s",
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domain);
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}
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/****************************************************************
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****************************************************************/
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static NTSTATUS dsgetdcname_cache_delete(TALLOC_CTX *mem_ctx,
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const char *domain_name)
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{
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char *key;
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key = dsgetdcname_cache_key(mem_ctx, domain_name);
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if (!key) {
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return NT_STATUS_NO_MEMORY;
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}
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if (!gencache_del(key)) {
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return NT_STATUS_UNSUCCESSFUL;
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}
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return NT_STATUS_OK;
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}
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/****************************************************************
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****************************************************************/
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static NTSTATUS dsgetdcname_cache_store(TALLOC_CTX *mem_ctx,
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const char *domain_name,
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DATA_BLOB blob)
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{
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time_t expire_time;
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char *key;
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bool ret = false;
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key = dsgetdcname_cache_key(mem_ctx, domain_name);
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if (!key) {
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return NT_STATUS_NO_MEMORY;
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}
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expire_time = time(NULL) + DSGETDCNAME_CACHE_TTL;
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ret = gencache_set_data_blob(key, blob, expire_time);
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return ret ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
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}
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/****************************************************************
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****************************************************************/
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static NTSTATUS store_cldap_reply(TALLOC_CTX *mem_ctx,
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uint32_t flags,
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struct samba_sockaddr *sa,
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uint32_t nt_version,
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struct NETLOGON_SAM_LOGON_RESPONSE_EX *r)
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{
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DATA_BLOB blob;
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enum ndr_err_code ndr_err;
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NTSTATUS status;
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char addr[INET6_ADDRSTRLEN];
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print_sockaddr(addr, sizeof(addr), &sa->u.ss);
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/* FIXME */
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r->sockaddr_size = 0x10; /* the w32 winsock addr size */
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r->sockaddr.sockaddr_family = 2; /* AF_INET */
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r->sockaddr.pdc_ip = talloc_strdup(mem_ctx, addr);
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ndr_err = ndr_push_struct_blob(&blob, mem_ctx, r,
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(ndr_push_flags_fn_t)ndr_push_NETLOGON_SAM_LOGON_RESPONSE_EX);
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if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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return ndr_map_error2ntstatus(ndr_err);
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}
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if (r->domain_name) {
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status = dsgetdcname_cache_store(mem_ctx, r->domain_name,
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blob);
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if (!NT_STATUS_IS_OK(status)) {
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goto done;
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}
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if (r->client_site) {
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sitename_store(r->domain_name, r->client_site);
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}
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}
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if (r->dns_domain) {
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status = dsgetdcname_cache_store(mem_ctx, r->dns_domain, blob);
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if (!NT_STATUS_IS_OK(status)) {
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goto done;
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}
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if (r->client_site) {
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sitename_store(r->dns_domain, r->client_site);
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}
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}
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status = NT_STATUS_OK;
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done:
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data_blob_free(&blob);
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return status;
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}
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/****************************************************************
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****************************************************************/
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static uint32_t get_cldap_reply_server_flags(struct netlogon_samlogon_response *r,
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uint32_t nt_version)
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{
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switch (nt_version & 0x0000001f) {
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case 0:
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case 1:
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case 16:
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case 17:
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return 0;
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case 2:
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case 3:
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case 18:
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case 19:
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return r->data.nt5.server_type;
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case 4:
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case 5:
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case 6:
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case 7:
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return r->data.nt5_ex.server_type;
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case 8:
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case 9:
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case 10:
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case 11:
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case 12:
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case 13:
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case 14:
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case 15:
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return r->data.nt5_ex.server_type;
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case 20:
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case 21:
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case 22:
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case 23:
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case 24:
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case 25:
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case 26:
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case 27:
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case 28:
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return r->data.nt5_ex.server_type;
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case 29:
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case 30:
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case 31:
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return r->data.nt5_ex.server_type;
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default:
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return 0;
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}
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}
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/****************************************************************
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****************************************************************/
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static NTSTATUS dsgetdcname_cache_fetch(TALLOC_CTX *mem_ctx,
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const char *domain_name,
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const struct GUID *domain_guid,
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uint32_t flags,
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struct netr_DsRGetDCNameInfo **info_p)
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{
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char *key;
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DATA_BLOB blob;
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enum ndr_err_code ndr_err;
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struct netr_DsRGetDCNameInfo *info;
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struct NETLOGON_SAM_LOGON_RESPONSE_EX r;
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NTSTATUS status;
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key = dsgetdcname_cache_key(mem_ctx, domain_name);
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if (!key) {
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return NT_STATUS_NO_MEMORY;
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}
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if (!gencache_get_data_blob(key, NULL, &blob, NULL, NULL)) {
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return NT_STATUS_NOT_FOUND;
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}
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info = talloc_zero(mem_ctx, struct netr_DsRGetDCNameInfo);
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if (!info) {
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data_blob_free(&blob);
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return NT_STATUS_NO_MEMORY;
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}
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ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, &r,
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(ndr_pull_flags_fn_t)ndr_pull_NETLOGON_SAM_LOGON_RESPONSE_EX);
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data_blob_free(&blob);
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if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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dsgetdcname_cache_delete(mem_ctx, domain_name);
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return ndr_map_error2ntstatus(ndr_err);
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}
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status = make_dc_info_from_cldap_reply(mem_ctx, flags, NULL,
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&r, &info);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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if (DEBUGLEVEL >= 10) {
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NDR_PRINT_DEBUG(netr_DsRGetDCNameInfo, info);
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}
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/* check flags */
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if (!check_cldap_reply_required_flags(info->dc_flags, flags)) {
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DEBUG(10,("invalid flags\n"));
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return NT_STATUS_INVALID_PARAMETER;
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}
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if ((flags & DS_IP_REQUIRED) &&
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(info->dc_address_type != DS_ADDRESS_TYPE_INET)) {
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return NT_STATUS_INVALID_PARAMETER_MIX;
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}
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*info_p = info;
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return NT_STATUS_OK;
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}
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/****************************************************************
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****************************************************************/
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static NTSTATUS dsgetdcname_cached(TALLOC_CTX *mem_ctx,
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struct messaging_context *msg_ctx,
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const char *domain_name,
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const struct GUID *domain_guid,
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uint32_t flags,
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const char *site_name,
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struct netr_DsRGetDCNameInfo **info)
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{
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NTSTATUS status;
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status = dsgetdcname_cache_fetch(mem_ctx, domain_name, domain_guid,
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flags, info);
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if (!NT_STATUS_IS_OK(status)
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&& !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
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DEBUG(10,("dsgetdcname_cached: cache fetch failed with: %s\n",
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nt_errstr(status)));
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return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
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}
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if (flags & DS_BACKGROUND_ONLY) {
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return status;
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}
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if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
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struct netr_DsRGetDCNameInfo *dc_info;
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status = dsgetdcname(mem_ctx, msg_ctx, domain_name,
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domain_guid, site_name,
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flags | DS_FORCE_REDISCOVERY,
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&dc_info);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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*info = dc_info;
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}
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return status;
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}
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/****************************************************************
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****************************************************************/
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static bool check_allowed_required_flags(uint32_t flags,
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const char *site_name)
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{
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uint32_t return_type = flags & (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME);
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uint32_t offered_type = flags & (DS_IS_FLAT_NAME|DS_IS_DNS_NAME);
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uint32_t query_type = flags & (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY);
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|
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/* FIXME: check for DSGETDC_VALID_FLAGS and check for excluse bits
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* (DS_PDC_REQUIRED, DS_KDC_REQUIRED, DS_GC_SERVER_REQUIRED) */
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debug_dsdcinfo_flags(10, flags);
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if ((flags & DS_TRY_NEXTCLOSEST_SITE) && site_name) {
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return false;
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}
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if (return_type == (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME)) {
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return false;
|
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}
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if (offered_type == (DS_IS_DNS_NAME|DS_IS_FLAT_NAME)) {
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return false;
|
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}
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|
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if (query_type == (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY)) {
|
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return false;
|
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}
|
|
|
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#if 0
|
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if ((flags & DS_RETURN_DNS_NAME) && (!(flags & DS_IP_REQUIRED))) {
|
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printf("gd: here5 \n");
|
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return false;
|
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}
|
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#endif
|
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return true;
|
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}
|
|
|
|
/****************************************************************
|
|
****************************************************************/
|
|
|
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static NTSTATUS discover_dc_netbios(TALLOC_CTX *mem_ctx,
|
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const char *domain_name,
|
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uint32_t flags,
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struct ip_service_name **returned_dclist,
|
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int *returned_count)
|
|
{
|
|
NTSTATUS status;
|
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enum nbt_name_type name_type = NBT_NAME_LOGON;
|
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struct ip_service *iplist = NULL;
|
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size_t i;
|
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struct ip_service_name *dclist = NULL;
|
|
size_t count;
|
|
static const char *resolve_order[] = { "lmhosts", "wins", "bcast", NULL };
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|
|
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if (flags & DS_PDC_REQUIRED) {
|
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name_type = NBT_NAME_PDC;
|
|
}
|
|
|
|
status = internal_resolve_name(mem_ctx,
|
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domain_name,
|
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name_type,
|
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NULL,
|
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&iplist,
|
|
&count,
|
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resolve_order);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
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DEBUG(10,("discover_dc_netbios: failed to find DC\n"));
|
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return status;
|
|
}
|
|
|
|
dclist = talloc_zero_array(mem_ctx, struct ip_service_name, count);
|
|
if (!dclist) {
|
|
TALLOC_FREE(iplist);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
for (i=0; i<count; i++) {
|
|
bool ok;
|
|
char addr[INET6_ADDRSTRLEN];
|
|
struct ip_service_name *r = &dclist[i];
|
|
|
|
print_sockaddr(addr, sizeof(addr),
|
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&iplist[i].ss);
|
|
|
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ok = sockaddr_storage_to_samba_sockaddr(&r->sa, &iplist[i].ss);
|
|
if (!ok) {
|
|
TALLOC_FREE(iplist);
|
|
TALLOC_FREE(dclist);
|
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return NT_STATUS_INVALID_PARAMETER;
|
|
}
|
|
r->hostname = talloc_strdup(mem_ctx, addr);
|
|
if (!r->hostname) {
|
|
TALLOC_FREE(iplist);
|
|
TALLOC_FREE(dclist);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
}
|
|
|
|
TALLOC_FREE(iplist);
|
|
|
|
/* Paranoia in casting size_t -> int. */
|
|
if ((int)count < 0) {
|
|
TALLOC_FREE(dclist);
|
|
return NT_STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
*returned_dclist = dclist;
|
|
*returned_count = count;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/****************************************************************
|
|
****************************************************************/
|
|
|
|
static NTSTATUS discover_dc_dns(TALLOC_CTX *mem_ctx,
|
|
const char *domain_name,
|
|
const struct GUID *domain_guid,
|
|
uint32_t flags,
|
|
const char *site_name,
|
|
struct ip_service_name **returned_dclist,
|
|
int *return_count)
|
|
{
|
|
size_t i;
|
|
NTSTATUS status;
|
|
struct dns_rr_srv *dcs = NULL;
|
|
int numdcs = 0;
|
|
struct ip_service_name *dclist = NULL;
|
|
size_t ret_count = 0;
|
|
size_t num_dns_lookups = 0;
|
|
const char **dns_lookups = NULL;
|
|
size_t num_lookups_ret = 0;
|
|
struct samba_sockaddr *dns_addrs_ret = NULL;
|
|
char **dns_lookups_ret = NULL;
|
|
|
|
if (flags & DS_PDC_REQUIRED) {
|
|
status = ads_dns_query_pdc(mem_ctx,
|
|
domain_name,
|
|
&dcs,
|
|
&numdcs);
|
|
} else if (flags & DS_GC_SERVER_REQUIRED) {
|
|
status = ads_dns_query_gcs(mem_ctx,
|
|
domain_name,
|
|
site_name,
|
|
&dcs,
|
|
&numdcs);
|
|
} else if (flags & DS_KDC_REQUIRED) {
|
|
status = ads_dns_query_kdcs(mem_ctx,
|
|
domain_name,
|
|
site_name,
|
|
&dcs,
|
|
&numdcs);
|
|
} else if (flags & DS_DIRECTORY_SERVICE_REQUIRED) {
|
|
status = ads_dns_query_dcs(mem_ctx,
|
|
domain_name,
|
|
site_name,
|
|
&dcs,
|
|
&numdcs);
|
|
} else if (domain_guid) {
|
|
struct GUID_txt_buf buf;
|
|
GUID_buf_string(domain_guid, &buf);
|
|
|
|
status = ads_dns_query_dcs_guid(mem_ctx,
|
|
domain_name,
|
|
buf.buf,
|
|
&dcs,
|
|
&numdcs);
|
|
} else {
|
|
status = ads_dns_query_dcs(mem_ctx,
|
|
domain_name,
|
|
site_name,
|
|
&dcs,
|
|
&numdcs);
|
|
}
|
|
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
TALLOC_FREE(dcs);
|
|
return status;
|
|
}
|
|
|
|
/* Wrap protect. */
|
|
if (numdcs < 0) {
|
|
TALLOC_FREE(dcs);
|
|
return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
|
|
}
|
|
|
|
if (numdcs == 0) {
|
|
TALLOC_FREE(dcs);
|
|
return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
|
|
}
|
|
|
|
/*
|
|
* We're only returning one address per
|
|
* DC name, so just allocate size numdcs.
|
|
*/
|
|
|
|
dclist = talloc_zero_array(mem_ctx,
|
|
struct ip_service_name,
|
|
numdcs);
|
|
if (!dclist) {
|
|
TALLOC_FREE(dcs);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
/*
|
|
* First, copy the SRV record replies that
|
|
* have IP addresses returned with them.
|
|
*/
|
|
ret_count = 0;
|
|
for (i = 0; i < numdcs; i++) {
|
|
size_t j;
|
|
|
|
if (dcs[i].num_ips == 0) {
|
|
/*
|
|
* No addresses returned in the SRV
|
|
* reply, we must look this up via
|
|
* DNS.
|
|
*/
|
|
num_dns_lookups++;
|
|
continue;
|
|
}
|
|
|
|
dclist[ret_count].hostname =
|
|
talloc_move(mem_ctx, &dcs[i].hostname);
|
|
|
|
/*
|
|
* Pick the first IPv4 address,
|
|
* if none pick the first address.
|
|
*
|
|
* This is different from the previous
|
|
* code which picked a 'next ip' address
|
|
* each time, incrementing an index.
|
|
* Too complex to maintain :-(.
|
|
*/
|
|
for (j = 0; j < dcs[i].num_ips; j++) {
|
|
if (dcs[i].ss_s[j].ss_family == AF_INET) {
|
|
bool ok;
|
|
ok = sockaddr_storage_to_samba_sockaddr(
|
|
&dclist[ret_count].sa,
|
|
&dcs[i].ss_s[j]);
|
|
if (!ok) {
|
|
TALLOC_FREE(dcs);
|
|
TALLOC_FREE(dclist);
|
|
return NT_STATUS_INVALID_PARAMETER;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (j == dcs[i].num_ips) {
|
|
/* No IPv4- use the first IPv6 addr. */
|
|
bool ok;
|
|
ok = sockaddr_storage_to_samba_sockaddr(
|
|
&dclist[ret_count].sa,
|
|
&dcs[i].ss_s[0]);
|
|
if (!ok) {
|
|
TALLOC_FREE(dcs);
|
|
TALLOC_FREE(dclist);
|
|
return NT_STATUS_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
ret_count++;
|
|
}
|
|
|
|
/*
|
|
* Now, create an array of hostnames we
|
|
* will asynchronously look up in DNS.
|
|
*/
|
|
dns_lookups = talloc_zero_array(mem_ctx,
|
|
const char *,
|
|
num_dns_lookups);
|
|
if (dns_lookups == NULL) {
|
|
TALLOC_FREE(dcs);
|
|
TALLOC_FREE(dclist);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
num_dns_lookups = 0;
|
|
for (i = 0; i < numdcs; i++) {
|
|
if (dcs[i].num_ips != 0) {
|
|
/*
|
|
* We already got an address
|
|
* for this via SRV return.
|
|
*/
|
|
continue;
|
|
}
|
|
dns_lookups[num_dns_lookups] =
|
|
talloc_strdup(mem_ctx, dcs[i].hostname);
|
|
if (dns_lookups[num_dns_lookups] == NULL) {
|
|
TALLOC_FREE(dcs);
|
|
TALLOC_FREE(dclist);
|
|
TALLOC_FREE(dns_lookups);
|
|
}
|
|
num_dns_lookups++;
|
|
}
|
|
|
|
status = dns_lookup_list_async(mem_ctx,
|
|
num_dns_lookups,
|
|
dns_lookups,
|
|
&num_lookups_ret,
|
|
&dns_addrs_ret,
|
|
&dns_lookups_ret);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
TALLOC_FREE(dcs);
|
|
TALLOC_FREE(dclist);
|
|
TALLOC_FREE(dns_lookups);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Remember, if we timed out or some
|
|
* addresses didn't look up then
|
|
* num_dns_lookups > num_lookups_ret,
|
|
* so there isn't a one to one correspondence.
|
|
*
|
|
* The order of the requests is preserved
|
|
* in the replies, but there may be requests
|
|
* for which there are no replies if we
|
|
* timed out.
|
|
*
|
|
* For example this means for looking up
|
|
* names:
|
|
* NAME1
|
|
* NAME2
|
|
* NAME3
|
|
*
|
|
* The replies might look like:
|
|
* NAME1 -> IPv4
|
|
* NAME1 -> IPv4
|
|
* NAME1 -> IPv6
|
|
* NAME1 -> IPv6
|
|
* NAME3 -> IPv6
|
|
*
|
|
* But they will never be in the order:
|
|
*
|
|
* NAME2
|
|
* NAME3
|
|
* NAME1
|
|
*
|
|
* Also in dns_lookup_list_async()
|
|
* we arrange the requests/replies in
|
|
* the order IPv4 followed by IPv6, so in
|
|
* the replies, we can always pick the first
|
|
* reply - we know it will be IPv4 if there
|
|
* is an IPv4 for that name.
|
|
*
|
|
* Here ret_count is the index into the
|
|
* next entry in dclist we must fill (may
|
|
* be zero).
|
|
*/
|
|
|
|
for (i = 0; i < num_lookups_ret; i++) {
|
|
dclist[ret_count].hostname =
|
|
talloc_move(mem_ctx, &dns_lookups_ret[i]);
|
|
dclist[ret_count].sa = dns_addrs_ret[i];
|
|
/*
|
|
* Is this a duplicate name return.
|
|
* Remember we can look up both A and
|
|
* AAAA records which can return multiple
|
|
* addresses and the order of names
|
|
* is preserved.
|
|
*/
|
|
if (ret_count > 0) {
|
|
if (strcmp(dclist[ret_count-1].hostname,
|
|
dclist[ret_count].hostname) == 0) {
|
|
/*
|
|
* Same name. Keep the first address
|
|
* which is IPv4 by preference.
|
|
*/
|
|
continue;
|
|
}
|
|
}
|
|
ret_count++;
|
|
|
|
if (ret_count == numdcs) {
|
|
/* We've filled the return array. */
|
|
break;
|
|
}
|
|
}
|
|
|
|
*returned_dclist = dclist;
|
|
*return_count = (int)ret_count;
|
|
|
|
if (*return_count < 0) {
|
|
TALLOC_FREE(dcs);
|
|
TALLOC_FREE(dclist);
|
|
TALLOC_FREE(dns_lookups);
|
|
return NT_STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
if (ret_count > 0) {
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
|
|
}
|
|
|
|
/****************************************************************
|
|
****************************************************************/
|
|
|
|
static NTSTATUS make_domain_controller_info(TALLOC_CTX *mem_ctx,
|
|
const char *dc_unc,
|
|
const char *dc_address,
|
|
uint32_t dc_address_type,
|
|
const struct GUID *domain_guid,
|
|
const char *domain_name,
|
|
const char *forest_name,
|
|
uint32_t flags,
|
|
const char *dc_site_name,
|
|
const char *client_site_name,
|
|
struct netr_DsRGetDCNameInfo **info_out)
|
|
{
|
|
struct netr_DsRGetDCNameInfo *info;
|
|
|
|
info = talloc_zero(mem_ctx, struct netr_DsRGetDCNameInfo);
|
|
NT_STATUS_HAVE_NO_MEMORY(info);
|
|
|
|
if (dc_unc) {
|
|
info->dc_unc = talloc_strdup(mem_ctx, dc_unc);
|
|
NT_STATUS_HAVE_NO_MEMORY(info->dc_unc);
|
|
}
|
|
|
|
if (dc_address) {
|
|
if (!(dc_address[0] == '\\' && dc_address[1] == '\\')) {
|
|
info->dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
|
|
dc_address);
|
|
} else {
|
|
info->dc_address = talloc_strdup(mem_ctx, dc_address);
|
|
}
|
|
NT_STATUS_HAVE_NO_MEMORY(info->dc_address);
|
|
}
|
|
|
|
info->dc_address_type = dc_address_type;
|
|
|
|
if (domain_guid) {
|
|
info->domain_guid = *domain_guid;
|
|
}
|
|
|
|
if (domain_name) {
|
|
info->domain_name = talloc_strdup(mem_ctx, domain_name);
|
|
NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
|
|
}
|
|
|
|
if (forest_name && *forest_name) {
|
|
info->forest_name = talloc_strdup(mem_ctx, forest_name);
|
|
NT_STATUS_HAVE_NO_MEMORY(info->forest_name);
|
|
flags |= DS_DNS_FOREST_ROOT;
|
|
}
|
|
|
|
info->dc_flags = flags;
|
|
|
|
if (dc_site_name) {
|
|
info->dc_site_name = talloc_strdup(mem_ctx, dc_site_name);
|
|
NT_STATUS_HAVE_NO_MEMORY(info->dc_site_name);
|
|
}
|
|
|
|
if (client_site_name) {
|
|
info->client_site_name = talloc_strdup(mem_ctx,
|
|
client_site_name);
|
|
NT_STATUS_HAVE_NO_MEMORY(info->client_site_name);
|
|
}
|
|
|
|
*info_out = info;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/****************************************************************
|
|
****************************************************************/
|
|
|
|
static void map_dc_and_domain_names(uint32_t flags,
|
|
const char *dc_name,
|
|
const char *domain_name,
|
|
const char *dns_dc_name,
|
|
const char *dns_domain_name,
|
|
uint32_t *dc_flags,
|
|
const char **hostname_p,
|
|
const char **domain_p)
|
|
{
|
|
switch (flags & 0xf0000000) {
|
|
case DS_RETURN_FLAT_NAME:
|
|
if (dc_name && domain_name &&
|
|
*dc_name && *domain_name) {
|
|
*hostname_p = dc_name;
|
|
*domain_p = domain_name;
|
|
break;
|
|
}
|
|
|
|
FALL_THROUGH;
|
|
case DS_RETURN_DNS_NAME:
|
|
default:
|
|
if (dns_dc_name && dns_domain_name &&
|
|
*dns_dc_name && *dns_domain_name) {
|
|
*hostname_p = dns_dc_name;
|
|
*domain_p = dns_domain_name;
|
|
*dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
|
|
break;
|
|
}
|
|
if (dc_name && domain_name &&
|
|
*dc_name && *domain_name) {
|
|
*hostname_p = dc_name;
|
|
*domain_p = domain_name;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/****************************************************************
|
|
****************************************************************/
|
|
|
|
static NTSTATUS make_dc_info_from_cldap_reply(
|
|
TALLOC_CTX *mem_ctx,
|
|
uint32_t flags,
|
|
const struct samba_sockaddr *sa,
|
|
struct NETLOGON_SAM_LOGON_RESPONSE_EX *r,
|
|
struct netr_DsRGetDCNameInfo **info)
|
|
{
|
|
const char *dc_hostname = NULL;
|
|
const char *dc_domain_name = NULL;
|
|
const char *dc_address = NULL;
|
|
const char *dc_forest = NULL;
|
|
uint32_t dc_address_type = 0;
|
|
uint32_t dc_flags = 0;
|
|
struct GUID *dc_domain_guid = NULL;
|
|
const char *dc_server_site = NULL;
|
|
const char *dc_client_site = NULL;
|
|
|
|
char addr[INET6_ADDRSTRLEN];
|
|
|
|
if (sa != NULL) {
|
|
print_sockaddr(addr, sizeof(addr), &sa->u.ss);
|
|
dc_address = addr;
|
|
dc_address_type = DS_ADDRESS_TYPE_INET;
|
|
} else {
|
|
if (r->sockaddr.pdc_ip) {
|
|
dc_address = r->sockaddr.pdc_ip;
|
|
dc_address_type = DS_ADDRESS_TYPE_INET;
|
|
} else {
|
|
dc_address = r->pdc_name;
|
|
dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
|
|
}
|
|
}
|
|
|
|
map_dc_and_domain_names(flags,
|
|
r->pdc_name,
|
|
r->domain_name,
|
|
r->pdc_dns_name,
|
|
r->dns_domain,
|
|
&dc_flags,
|
|
&dc_hostname,
|
|
&dc_domain_name);
|
|
|
|
dc_flags |= r->server_type;
|
|
dc_forest = r->forest;
|
|
dc_domain_guid = &r->domain_uuid;
|
|
dc_server_site = r->server_site;
|
|
dc_client_site = r->client_site;
|
|
|
|
return make_domain_controller_info(mem_ctx,
|
|
dc_hostname,
|
|
dc_address,
|
|
dc_address_type,
|
|
dc_domain_guid,
|
|
dc_domain_name,
|
|
dc_forest,
|
|
dc_flags,
|
|
dc_server_site,
|
|
dc_client_site,
|
|
info);
|
|
}
|
|
|
|
/****************************************************************
|
|
****************************************************************/
|
|
|
|
static uint32_t map_ds_flags_to_nt_version(uint32_t flags)
|
|
{
|
|
uint32_t nt_version = 0;
|
|
|
|
if (flags & DS_PDC_REQUIRED) {
|
|
nt_version |= NETLOGON_NT_VERSION_PDC;
|
|
}
|
|
|
|
if (flags & DS_GC_SERVER_REQUIRED) {
|
|
nt_version |= NETLOGON_NT_VERSION_GC;
|
|
}
|
|
|
|
if (flags & DS_TRY_NEXTCLOSEST_SITE) {
|
|
nt_version |= NETLOGON_NT_VERSION_WITH_CLOSEST_SITE;
|
|
}
|
|
|
|
if (flags & DS_IP_REQUIRED) {
|
|
nt_version |= NETLOGON_NT_VERSION_IP;
|
|
}
|
|
|
|
return nt_version;
|
|
}
|
|
|
|
/****************************************************************
|
|
****************************************************************/
|
|
|
|
static NTSTATUS process_dc_dns(TALLOC_CTX *mem_ctx,
|
|
const char *domain_name,
|
|
uint32_t flags,
|
|
struct ip_service_name *dclist,
|
|
int num_dcs,
|
|
struct netr_DsRGetDCNameInfo **info)
|
|
{
|
|
int i = 0;
|
|
bool valid_dc = false;
|
|
struct netlogon_samlogon_response *r = NULL;
|
|
uint32_t nt_version = NETLOGON_NT_VERSION_5 |
|
|
NETLOGON_NT_VERSION_5EX;
|
|
uint32_t ret_flags = 0;
|
|
NTSTATUS status;
|
|
|
|
nt_version |= map_ds_flags_to_nt_version(flags);
|
|
|
|
for (i=0; i<num_dcs; i++) {
|
|
char addr[INET6_ADDRSTRLEN];
|
|
|
|
print_sockaddr(addr, sizeof(addr), &dclist[i].sa.u.ss);
|
|
|
|
DEBUG(10,("LDAP ping to %s (%s)\n", dclist[i].hostname, addr));
|
|
|
|
if (ads_cldap_netlogon(mem_ctx, &dclist[i].sa.u.ss,
|
|
domain_name,
|
|
nt_version,
|
|
&r))
|
|
{
|
|
nt_version = r->ntver;
|
|
ret_flags = get_cldap_reply_server_flags(r, nt_version);
|
|
|
|
if (check_cldap_reply_required_flags(ret_flags, flags)) {
|
|
valid_dc = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if (!valid_dc) {
|
|
return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
|
|
}
|
|
|
|
status = make_dc_info_from_cldap_reply(mem_ctx, flags, &dclist[i].sa,
|
|
&r->data.nt5_ex, info);
|
|
if (NT_STATUS_IS_OK(status)) {
|
|
return store_cldap_reply(mem_ctx, flags, &dclist[i].sa,
|
|
nt_version, &r->data.nt5_ex);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/****************************************************************
|
|
****************************************************************/
|
|
|
|
/****************************************************************
|
|
****************************************************************/
|
|
|
|
static NTSTATUS process_dc_netbios(TALLOC_CTX *mem_ctx,
|
|
struct messaging_context *msg_ctx,
|
|
const char *domain_name,
|
|
uint32_t flags,
|
|
struct ip_service_name *dclist,
|
|
int num_dcs,
|
|
struct netr_DsRGetDCNameInfo **info)
|
|
{
|
|
enum nbt_name_type name_type = NBT_NAME_LOGON;
|
|
NTSTATUS status;
|
|
int i;
|
|
const char *dc_name = NULL;
|
|
fstring tmp_dc_name;
|
|
struct netlogon_samlogon_response *r = NULL;
|
|
bool store_cache = false;
|
|
uint32_t nt_version = NETLOGON_NT_VERSION_1 |
|
|
NETLOGON_NT_VERSION_5 |
|
|
NETLOGON_NT_VERSION_5EX_WITH_IP;
|
|
size_t len = strlen(lp_netbios_name());
|
|
char my_acct_name[len+2];
|
|
|
|
if (msg_ctx == NULL) {
|
|
return NT_STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (flags & DS_PDC_REQUIRED) {
|
|
name_type = NBT_NAME_PDC;
|
|
}
|
|
|
|
nt_version |= map_ds_flags_to_nt_version(flags);
|
|
|
|
snprintf(my_acct_name,
|
|
sizeof(my_acct_name),
|
|
"%s$",
|
|
lp_netbios_name());
|
|
|
|
DEBUG(10,("process_dc_netbios\n"));
|
|
|
|
for (i=0; i<num_dcs; i++) {
|
|
uint16_t val;
|
|
|
|
generate_random_buffer((uint8_t *)&val, 2);
|
|
|
|
status = nbt_getdc(msg_ctx, 10, &dclist[i].sa.u.ss, domain_name,
|
|
NULL, my_acct_name, ACB_WSTRUST, nt_version,
|
|
mem_ctx, &nt_version, &dc_name, &r);
|
|
if (NT_STATUS_IS_OK(status)) {
|
|
store_cache = true;
|
|
namecache_store(dc_name,
|
|
NBT_NAME_SERVER,
|
|
1,
|
|
&dclist[i].sa);
|
|
goto make_reply;
|
|
}
|
|
|
|
if (name_status_find(domain_name,
|
|
name_type,
|
|
NBT_NAME_SERVER,
|
|
&dclist[i].sa.u.ss,
|
|
tmp_dc_name))
|
|
{
|
|
struct NETLOGON_SAM_LOGON_RESPONSE_NT40 logon1;
|
|
|
|
r = talloc_zero(mem_ctx, struct netlogon_samlogon_response);
|
|
NT_STATUS_HAVE_NO_MEMORY(r);
|
|
|
|
ZERO_STRUCT(logon1);
|
|
|
|
nt_version = NETLOGON_NT_VERSION_1;
|
|
|
|
logon1.nt_version = nt_version;
|
|
logon1.pdc_name = tmp_dc_name;
|
|
logon1.domain_name = talloc_strdup_upper(mem_ctx, domain_name);
|
|
NT_STATUS_HAVE_NO_MEMORY(logon1.domain_name);
|
|
|
|
r->data.nt4 = logon1;
|
|
r->ntver = nt_version;
|
|
|
|
map_netlogon_samlogon_response(r);
|
|
|
|
namecache_store(tmp_dc_name,
|
|
NBT_NAME_SERVER,
|
|
1,
|
|
&dclist[i].sa);
|
|
|
|
goto make_reply;
|
|
}
|
|
}
|
|
|
|
return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
|
|
|
|
make_reply:
|
|
|
|
status = make_dc_info_from_cldap_reply(mem_ctx, flags, &dclist[i].sa,
|
|
&r->data.nt5_ex, info);
|
|
if (NT_STATUS_IS_OK(status) && store_cache) {
|
|
return store_cldap_reply(mem_ctx, flags, &dclist[i].sa,
|
|
nt_version, &r->data.nt5_ex);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/****************************************************************
|
|
****************************************************************/
|
|
|
|
static NTSTATUS dsgetdcname_rediscover(TALLOC_CTX *mem_ctx,
|
|
struct messaging_context *msg_ctx,
|
|
const char *domain_name,
|
|
const struct GUID *domain_guid,
|
|
uint32_t flags,
|
|
const char *site_name,
|
|
struct netr_DsRGetDCNameInfo **info)
|
|
{
|
|
NTSTATUS status;
|
|
struct ip_service_name *dclist = NULL;
|
|
int num_dcs;
|
|
|
|
DEBUG(10,("dsgetdcname_rediscover\n"));
|
|
|
|
if (flags & DS_IS_FLAT_NAME) {
|
|
|
|
if (lp_disable_netbios()) {
|
|
return NT_STATUS_NOT_SUPPORTED;
|
|
}
|
|
|
|
status = discover_dc_netbios(mem_ctx, domain_name, flags,
|
|
&dclist, &num_dcs);
|
|
NT_STATUS_NOT_OK_RETURN(status);
|
|
|
|
return process_dc_netbios(mem_ctx, msg_ctx, domain_name, flags,
|
|
dclist, num_dcs, info);
|
|
}
|
|
|
|
if (flags & DS_IS_DNS_NAME) {
|
|
|
|
status = discover_dc_dns(mem_ctx, domain_name, domain_guid,
|
|
flags, site_name, &dclist, &num_dcs);
|
|
NT_STATUS_NOT_OK_RETURN(status);
|
|
|
|
return process_dc_dns(mem_ctx, domain_name, flags,
|
|
dclist, num_dcs, info);
|
|
}
|
|
|
|
status = discover_dc_dns(mem_ctx, domain_name, domain_guid, flags,
|
|
site_name, &dclist, &num_dcs);
|
|
|
|
if (NT_STATUS_IS_OK(status) && num_dcs != 0) {
|
|
|
|
status = process_dc_dns(mem_ctx, domain_name, flags, dclist,
|
|
num_dcs, info);
|
|
if (NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
}
|
|
|
|
if (lp_disable_netbios()) {
|
|
return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
|
|
}
|
|
|
|
status = discover_dc_netbios(mem_ctx, domain_name, flags, &dclist,
|
|
&num_dcs);
|
|
NT_STATUS_NOT_OK_RETURN(status);
|
|
|
|
return process_dc_netbios(mem_ctx, msg_ctx, domain_name, flags, dclist,
|
|
num_dcs, info);
|
|
}
|
|
|
|
static bool is_closest_site(struct netr_DsRGetDCNameInfo *info)
|
|
{
|
|
if (info->dc_flags & DS_SERVER_CLOSEST) {
|
|
return true;
|
|
}
|
|
|
|
if (!info->client_site_name) {
|
|
return true;
|
|
}
|
|
|
|
if (!info->dc_site_name) {
|
|
return false;
|
|
}
|
|
|
|
if (strcmp(info->client_site_name, info->dc_site_name) == 0) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/********************************************************************
|
|
Internal dsgetdcname.
|
|
********************************************************************/
|
|
|
|
static NTSTATUS dsgetdcname_internal(TALLOC_CTX *mem_ctx,
|
|
struct messaging_context *msg_ctx,
|
|
const char *domain_name,
|
|
const struct GUID *domain_guid,
|
|
const char *site_name,
|
|
uint32_t flags,
|
|
struct netr_DsRGetDCNameInfo **info)
|
|
{
|
|
NTSTATUS status;
|
|
struct netr_DsRGetDCNameInfo *myinfo = NULL;
|
|
bool first = true;
|
|
struct netr_DsRGetDCNameInfo *first_info = NULL;
|
|
|
|
DEBUG(10,("dsgetdcname_internal: domain_name: %s, "
|
|
"domain_guid: %s, site_name: %s, flags: 0x%08x\n",
|
|
domain_name,
|
|
domain_guid ? GUID_string(mem_ctx, domain_guid) : "(null)",
|
|
site_name ? site_name : "(null)", flags));
|
|
|
|
*info = NULL;
|
|
|
|
if (!check_allowed_required_flags(flags, site_name)) {
|
|
DEBUG(0,("invalid flags specified\n"));
|
|
return NT_STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (flags & DS_FORCE_REDISCOVERY) {
|
|
goto rediscover;
|
|
}
|
|
|
|
status = dsgetdcname_cached(mem_ctx, msg_ctx, domain_name, domain_guid,
|
|
flags, site_name, &myinfo);
|
|
if (NT_STATUS_IS_OK(status)) {
|
|
goto done;
|
|
}
|
|
|
|
if (flags & DS_BACKGROUND_ONLY) {
|
|
goto done;
|
|
}
|
|
|
|
rediscover:
|
|
status = dsgetdcname_rediscover(mem_ctx, msg_ctx, domain_name,
|
|
domain_guid, flags, site_name,
|
|
&myinfo);
|
|
|
|
done:
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
if (!first) {
|
|
*info = first_info;
|
|
return NT_STATUS_OK;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
if (!first) {
|
|
TALLOC_FREE(first_info);
|
|
} else if (!is_closest_site(myinfo)) {
|
|
first = false;
|
|
first_info = myinfo;
|
|
/* TODO: may use the next_closest_site here */
|
|
site_name = myinfo->client_site_name;
|
|
goto rediscover;
|
|
}
|
|
|
|
*info = myinfo;
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/********************************************************************
|
|
dsgetdcname.
|
|
|
|
This will be the only public function here.
|
|
********************************************************************/
|
|
|
|
NTSTATUS dsgetdcname(TALLOC_CTX *mem_ctx,
|
|
struct messaging_context *msg_ctx,
|
|
const char *domain_name,
|
|
const struct GUID *domain_guid,
|
|
const char *site_name,
|
|
uint32_t flags,
|
|
struct netr_DsRGetDCNameInfo **info)
|
|
{
|
|
NTSTATUS status;
|
|
const char *query_site = NULL;
|
|
char *ptr_to_free = NULL;
|
|
bool retry_query_with_null = false;
|
|
|
|
if ((site_name == NULL) || (site_name[0] == '\0')) {
|
|
ptr_to_free = sitename_fetch(mem_ctx, domain_name);
|
|
if (ptr_to_free != NULL) {
|
|
retry_query_with_null = true;
|
|
}
|
|
query_site = ptr_to_free;
|
|
} else {
|
|
query_site = site_name;
|
|
}
|
|
|
|
status = dsgetdcname_internal(mem_ctx,
|
|
msg_ctx,
|
|
domain_name,
|
|
domain_guid,
|
|
query_site,
|
|
flags,
|
|
info);
|
|
|
|
TALLOC_FREE(ptr_to_free);
|
|
|
|
if (!NT_STATUS_EQUAL(status, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
|
|
return status;
|
|
}
|
|
|
|
/* Should we try again with site_name == NULL ? */
|
|
if (retry_query_with_null) {
|
|
status = dsgetdcname_internal(mem_ctx,
|
|
msg_ctx,
|
|
domain_name,
|
|
domain_guid,
|
|
NULL,
|
|
flags,
|
|
info);
|
|
}
|
|
|
|
return status;
|
|
}
|