/src/samba/source4/libcli/finddcs_cldap.c

Source
/*
   Unix SMB/CIFS implementation.

   a composite API for finding a DC and its name via CLDAP

   Copyright (C) Andrew Tridgell 2010
   Copyright (C) Andrew Bartlett 2010

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

   This program 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 General Public License for more details.

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

#include "include/includes.h"
#include <tevent.h>
#include "libcli/resolve/resolve.h"
#include "libcli/cldap/cldap.h"
#include "libcli/finddc.h"
#include "libcli/security/security.h"
#include "lib/util/tevent_ntstatus.h"
#include "lib/tsocket/tsocket.h"
#include "libcli/composite/composite.h"
#include "lib/util/util_net.h"
#include "source3/libads/netlogon_ping.h"

struct finddcs_cldap_state {
  struct tevent_context *ev;
  struct tevent_req *req;
  const char *domain_name;
  struct dom_sid *domain_sid;
  const char *srv_name;
  const char **srv_addresses;
  uint32_t minimum_dc_flags;
  enum client_netlogon_ping_protocol proto;
  uint32_t srv_address_index;
  struct netlogon_samlogon_response *response;
  NTSTATUS status;
};

static void finddcs_cldap_srv_resolved(struct composite_context *ctx);
static void finddcs_cldap_netlogon_replied(struct tevent_req *req);
static bool finddcs_cldap_srv_lookup(struct finddcs_cldap_state *state,
             struct finddcs *io,
             struct resolve_context *resolve_ctx,
             struct tevent_context *event_ctx);
static bool finddcs_cldap_nbt_lookup(struct finddcs_cldap_state *state,
             struct finddcs *io,
             struct resolve_context *resolve_ctx,
             struct tevent_context *event_ctx);
static void finddcs_cldap_nbt_resolved(struct composite_context *ctx);
static bool finddcs_cldap_name_lookup(struct finddcs_cldap_state *state,
              struct finddcs *io,
              struct resolve_context *resolve_ctx,
              struct tevent_context *event_ctx);
static void finddcs_cldap_name_resolved(struct composite_context *ctx);
static void finddcs_cldap_next_server(struct finddcs_cldap_state *state);
static bool finddcs_cldap_ipaddress(struct finddcs_cldap_state *state, struct finddcs *io);


/*
 * find a list of DCs via DNS/CLDAP
 */
struct tevent_req *finddcs_cldap_send(TALLOC_CTX *mem_ctx,
              struct finddcs *io,
              struct resolve_context *resolve_ctx,
              struct tevent_context *event_ctx)
{
  struct finddcs_cldap_state *state;
  struct tevent_req *req;

  req = tevent_req_create(mem_ctx, &state, struct finddcs_cldap_state);
  if (req == NULL) {
    return NULL;
  }

  state->req = req;
  state->ev = event_ctx;
  state->minimum_dc_flags = io->in.minimum_dc_flags;
  state->proto = io->in.proto;

  if (io->in.domain_name) {
    state->domain_name = talloc_strdup(state, io->in.domain_name);
    if (tevent_req_nomem(state->domain_name, req)) {
      return tevent_req_post(req, event_ctx);
    }
  } else {
    state->domain_name = NULL;
  }

  if (io->in.domain_sid) {
    state->domain_sid = dom_sid_dup(state, io->in.domain_sid);
    if (tevent_req_nomem(state->domain_sid, req)) {
      return tevent_req_post(req, event_ctx);
    }
  } else {
    state->domain_sid = NULL;
  }

  if (io->in.server_address) {
    if (is_ipaddress(io->in.server_address)) {
      DEBUG(4,("finddcs: searching for a DC by IP %s\n",
         io->in.server_address));
      if (!finddcs_cldap_ipaddress(state, io)) {
        return tevent_req_post(req, event_ctx);
      }
    } else {
      if (!finddcs_cldap_name_lookup(state, io, resolve_ctx,
                   event_ctx)) {
        return tevent_req_post(req, event_ctx);
      }
    }
  } else if (io->in.domain_name) {
    if (strchr(state->domain_name, '.')) {
      /* looks like a DNS name */
      DEBUG(4,("finddcs: searching for a DC by DNS domain %s\n", state->domain_name));
      if (!finddcs_cldap_srv_lookup(state, io, resolve_ctx,
                  event_ctx)) {
        return tevent_req_post(req, event_ctx);
      }
    } else {
      DEBUG(4,("finddcs: searching for a DC by NBT lookup %s\n", state->domain_name));
      if (!finddcs_cldap_nbt_lookup(state, io, resolve_ctx,
                  event_ctx)) {
        return tevent_req_post(req, event_ctx);
      }
    }
  } else {
    /* either we have the domain name or the IP address */
    tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
    DEBUG(2,("finddcs: Please specify at least the domain name or the IP address! \n"));
    return tevent_req_post(req, event_ctx);
  }

  return req;
}


/*
  we've been told the IP of the server, bypass name
  resolution and go straight to CLDAP
*/
static bool finddcs_cldap_ipaddress(struct finddcs_cldap_state *state, struct finddcs *io)
{
  NTSTATUS status;

  state->srv_addresses = talloc_array(state, const char *, 2);
  if (tevent_req_nomem(state->srv_addresses, state->req)) {
    return false;
  }
  state->srv_addresses[0] = talloc_strdup(state->srv_addresses, io->in.server_address);
  if (tevent_req_nomem(state->srv_addresses[0], state->req)) {
    return false;
  }
  state->srv_addresses[1] = NULL;
  state->srv_address_index = 0;

  finddcs_cldap_next_server(state);
  return tevent_req_is_nterror(state->req, &status);
}

/*
  start a SRV DNS lookup
 */
static bool finddcs_cldap_srv_lookup(struct finddcs_cldap_state *state,
             struct finddcs *io,
             struct resolve_context *resolve_ctx,
             struct tevent_context *event_ctx)
{
  struct composite_context *creq;
  struct nbt_name name;

  if (io->in.site_name) {
    state->srv_name = talloc_asprintf(state, "_ldap._tcp.%s._sites.%s",
             io->in.site_name, io->in.domain_name);
  } else {
    state->srv_name = talloc_asprintf(state, "_ldap._tcp.%s", io->in.domain_name);
  }

  DEBUG(4,("finddcs: looking for SRV records for %s\n", state->srv_name));

  make_nbt_name(&name, state->srv_name, 0);

  creq = resolve_name_ex_send(resolve_ctx, state,
            RESOLVE_NAME_FLAG_FORCE_DNS | RESOLVE_NAME_FLAG_DNS_SRV,
            0, &name, event_ctx);
  if (tevent_req_nomem(creq, state->req)) {
    return false;
  }
  creq->async.fn = finddcs_cldap_srv_resolved;
  creq->async.private_data = state;

  return true;
}

/*
  start a NBT name lookup for domain<1C>
 */
static bool finddcs_cldap_nbt_lookup(struct finddcs_cldap_state *state,
             struct finddcs *io,
             struct resolve_context *resolve_ctx,
             struct tevent_context *event_ctx)
{
  struct composite_context *creq;
  struct nbt_name name;

  make_nbt_name(&name, state->domain_name, NBT_NAME_LOGON);
  creq = resolve_name_send(resolve_ctx, state, &name, event_ctx);
  if (tevent_req_nomem(creq, state->req)) {
    return false;
  }
  creq->async.fn = finddcs_cldap_nbt_resolved;
  creq->async.private_data = state;
  return true;
}

static bool finddcs_cldap_name_lookup(struct finddcs_cldap_state *state,
              struct finddcs *io,
              struct resolve_context *resolve_ctx,
              struct tevent_context *event_ctx)
{
  struct composite_context *creq;
  struct nbt_name name;

  make_nbt_name(&name, io->in.server_address, NBT_NAME_SERVER);
  creq = resolve_name_send(resolve_ctx, state, &name, event_ctx);
  if (tevent_req_nomem(creq, state->req)) {
    return false;
  }
  creq->async.fn = finddcs_cldap_name_resolved;
  creq->async.private_data = state;
  return true;
}

/*
  fire off a CLDAP query to the next server
 */
static void finddcs_cldap_next_server(struct finddcs_cldap_state *state)
{
  struct tevent_req *subreq;
  struct tsocket_address **servers = NULL;
  const char *realm = NULL;
  size_t i, num_servers;
  int ret;

  num_servers = str_list_length(state->srv_addresses);

  servers = talloc_array(state, struct tsocket_address *, num_servers);
  if (tevent_req_nomem(servers, state->req)) {
    return;
  }

  for (i = 0; i < num_servers; i++) {
    ret = tsocket_address_inet_from_strings(
      servers,
      "ip",
      state->srv_addresses[i],
      389,
      &servers[i]);
    if (ret == -1) {
      NTSTATUS status = map_nt_error_from_unix_common(errno);
      tevent_req_nterror(state->req, status);
      return;
    }
  }

  if ((state->domain_name != NULL) && (strchr(state->domain_name, '.'))) {
    realm = state->domain_name;
  }

  subreq = netlogon_pings_send(
    state,
    state->ev,
    state->proto,
    servers,
    num_servers,
    (struct netlogon_ping_filter){
      .ntversion = NETLOGON_NT_VERSION_5 |
             NETLOGON_NT_VERSION_5EX |
             NETLOGON_NT_VERSION_IP,

      .acct_ctrl = -1,
      .domain = realm,
      .domain_sid = state->domain_sid,
      .required_flags = state->minimum_dc_flags,
    },
    1, /* min_servers */
    tevent_timeval_current_ofs(2, 0));
  if (tevent_req_nomem(subreq, state->req)) {
    return;
  }
  tevent_req_set_callback(subreq, finddcs_cldap_netlogon_replied, state);
}


/*
  we have a response from a CLDAP server for a netlogon request
 */
static void finddcs_cldap_netlogon_replied(struct tevent_req *subreq)
{
  struct finddcs_cldap_state *state;
  struct netlogon_samlogon_response **responses = NULL;
  size_t i, num_responses;
  NTSTATUS status;

  state = tevent_req_callback_data(subreq, struct finddcs_cldap_state);

  status = netlogon_pings_recv(subreq, state, &responses);
  TALLOC_FREE(subreq);
  if (tevent_req_nterror(state->req, status)) {
    return;
  }

  num_responses = talloc_array_length(responses);

  for (i = 0; i < num_responses; i++) {
    if (responses[i] != NULL) {
      state->srv_address_index = i;
      state->response = responses[i];
    }
  }

  if (state->response == NULL) {
    tevent_req_nterror(state->req,
           NT_STATUS_OBJECT_NAME_NOT_FOUND);
    return;
  }

  map_netlogon_samlogon_response(state->response);

  DEBUG(4,("finddcs: Found matching DC %s with server_type=0x%08x\n",
     state->srv_addresses[state->srv_address_index],
     state->response->data.nt5_ex.server_type));

  tevent_req_done(state->req);
}

static void finddcs_cldap_name_resolved(struct composite_context *ctx)
{
  struct finddcs_cldap_state *state =
    talloc_get_type(ctx->async.private_data, struct finddcs_cldap_state);
  NTSTATUS status;
  unsigned i;

  status = resolve_name_multiple_recv(ctx, state, &state->srv_addresses);
  if (tevent_req_nterror(state->req, status)) {
    DEBUG(2,("finddcs: No matching server found\n"));
    return;
  }

  for (i=0; state->srv_addresses[i]; i++) {
    DEBUG(4,("finddcs: response %u at '%s'\n",
             i, state->srv_addresses[i]));
  }

  state->srv_address_index = 0;

  state->status = NT_STATUS_OK;
  finddcs_cldap_next_server(state);
}

/*
   handle NBT name lookup reply
 */
static void finddcs_cldap_nbt_resolved(struct composite_context *ctx)
{
  struct finddcs_cldap_state *state =
    talloc_get_type(ctx->async.private_data, struct finddcs_cldap_state);
  NTSTATUS status;
  unsigned i;

  status = resolve_name_multiple_recv(ctx, state, &state->srv_addresses);
  if (tevent_req_nterror(state->req, status)) {
    DEBUG(2,("finddcs: No matching NBT <1c> server found\n"));
    return;
  }

  for (i=0; state->srv_addresses[i]; i++) {
    DEBUG(4,("finddcs: NBT <1c> response %u at '%s'\n",
             i, state->srv_addresses[i]));
  }

  state->srv_address_index = 0;

  finddcs_cldap_next_server(state);
}


/*
 * Having got a DNS SRV answer, fire off the first CLDAP request
 */
static void finddcs_cldap_srv_resolved(struct composite_context *ctx)
{
  struct finddcs_cldap_state *state =
    talloc_get_type(ctx->async.private_data, struct finddcs_cldap_state);
  NTSTATUS status;
  unsigned i;

  status = resolve_name_multiple_recv(ctx, state, &state->srv_addresses);
  if (tevent_req_nterror(state->req, status)) {
    DEBUG(2,("finddcs: Failed to find SRV record for %s\n", state->srv_name));
    return;
  }

  for (i=0; state->srv_addresses[i]; i++) {
    DEBUG(4,("finddcs: DNS SRV response %u at '%s'\n", i, state->srv_addresses[i]));
  }

  state->srv_address_index = 0;

  state->status = NT_STATUS_OK;
  finddcs_cldap_next_server(state);
}


NTSTATUS finddcs_cldap_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, struct finddcs *io)
{
  struct finddcs_cldap_state *state = tevent_req_data(req, struct finddcs_cldap_state);
  bool ok;
  NTSTATUS status;

  ok = tevent_req_poll(req, state->ev);
  if (!ok) {
    talloc_free(req);
    return NT_STATUS_INTERNAL_ERROR;
  }
  if (tevent_req_is_nterror(req, &status)) {
    tevent_req_received(req);
    return status;
  }

  io->out.netlogon = talloc_move(mem_ctx, &state->response);
  io->out.address = talloc_steal(
    mem_ctx, state->srv_addresses[state->srv_address_index]);

  tevent_req_received(req);
  return NT_STATUS_OK;
}

NTSTATUS finddcs_cldap(TALLOC_CTX *mem_ctx,
           struct finddcs *io,
           struct resolve_context *resolve_ctx,
           struct tevent_context *event_ctx)
{
  NTSTATUS status;
  struct tevent_req *req = finddcs_cldap_send(mem_ctx,
                io,
                resolve_ctx,
                event_ctx);
  status = finddcs_cldap_recv(req, mem_ctx, io);
  talloc_free(req);
  return status;
}

Coverage Report

Created: 2025-12-31 06:20

Line	Count	Source
1		/*
2		Unix SMB/CIFS implementation.
3
4		a composite API for finding a DC and its name via CLDAP
5
6		Copyright (C) Andrew Tridgell 2010
7		Copyright (C) Andrew Bartlett 2010
8
9		This program is free software; you can redistribute it and/or modify
10		it under the terms of the GNU General Public License as published by
11		the Free Software Foundation; either version 3 of the License, or
12		(at your option) any later version.
13
14		This program is distributed in the hope that it will be useful,
15		but WITHOUT ANY WARRANTY; without even the implied warranty of
16		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17		GNU General Public License for more details.
18
19		You should have received a copy of the GNU General Public License
20		along with this program. If not, see <http://www.gnu.org/licenses/>.
21		*/
22
23		#include "include/includes.h"
24		#include <tevent.h>
25		#include "libcli/resolve/resolve.h"
26		#include "libcli/cldap/cldap.h"
27		#include "libcli/finddc.h"
28		#include "libcli/security/security.h"
29		#include "lib/util/tevent_ntstatus.h"
30		#include "lib/tsocket/tsocket.h"
31		#include "libcli/composite/composite.h"
32		#include "lib/util/util_net.h"
33		#include "source3/libads/netlogon_ping.h"
34
35		struct finddcs_cldap_state {
36		struct tevent_context *ev;
37		struct tevent_req *req;
38		const char *domain_name;
39		struct dom_sid *domain_sid;
40		const char *srv_name;
41		const char **srv_addresses;
42		uint32_t minimum_dc_flags;
43		enum client_netlogon_ping_protocol proto;
44		uint32_t srv_address_index;
45		struct netlogon_samlogon_response *response;
46		NTSTATUS status;
47		};
48
49		static void finddcs_cldap_srv_resolved(struct composite_context *ctx);
50		static void finddcs_cldap_netlogon_replied(struct tevent_req *req);
51		static bool finddcs_cldap_srv_lookup(struct finddcs_cldap_state *state,
52		struct finddcs *io,
53		struct resolve_context *resolve_ctx,
54		struct tevent_context *event_ctx);
55		static bool finddcs_cldap_nbt_lookup(struct finddcs_cldap_state *state,
56		struct finddcs *io,
57		struct resolve_context *resolve_ctx,
58		struct tevent_context *event_ctx);
59		static void finddcs_cldap_nbt_resolved(struct composite_context *ctx);
60		static bool finddcs_cldap_name_lookup(struct finddcs_cldap_state *state,
61		struct finddcs *io,
62		struct resolve_context *resolve_ctx,
63		struct tevent_context *event_ctx);
64		static void finddcs_cldap_name_resolved(struct composite_context *ctx);
65		static void finddcs_cldap_next_server(struct finddcs_cldap_state *state);
66		static bool finddcs_cldap_ipaddress(struct finddcs_cldap_state state, struct finddcs io);
67
68
69		/*
70		* find a list of DCs via DNS/CLDAP
71		*/
72		struct tevent_req finddcs_cldap_send(TALLOC_CTX mem_ctx,
73		struct finddcs *io,
74		struct resolve_context *resolve_ctx,
75		struct tevent_context *event_ctx)
76	0	{
77	0	struct finddcs_cldap_state *state;
78	0	struct tevent_req *req;
79
80	0	req = tevent_req_create(mem_ctx, &state, struct finddcs_cldap_state);
81	0	if (req == NULL) {
82	0	return NULL;
83	0	}
84
85	0	state->req = req;
86	0	state->ev = event_ctx;
87	0	state->minimum_dc_flags = io->in.minimum_dc_flags;
88	0	state->proto = io->in.proto;
89
90	0	if (io->in.domain_name) {
91	0	state->domain_name = talloc_strdup(state, io->in.domain_name);
92	0	if (tevent_req_nomem(state->domain_name, req)) {
93	0	return tevent_req_post(req, event_ctx);
94	0	}
95	0	} else {
96	0	state->domain_name = NULL;
97	0	}
98
99	0	if (io->in.domain_sid) {
100	0	state->domain_sid = dom_sid_dup(state, io->in.domain_sid);
101	0	if (tevent_req_nomem(state->domain_sid, req)) {
102	0	return tevent_req_post(req, event_ctx);
103	0	}
104	0	} else {
105	0	state->domain_sid = NULL;
106	0	}
107
108	0	if (io->in.server_address) {
109	0	if (is_ipaddress(io->in.server_address)) {
110	0	DEBUG(4,("finddcs: searching for a DC by IP %s\n",
111	0	io->in.server_address));
112	0	if (!finddcs_cldap_ipaddress(state, io)) {
113	0	return tevent_req_post(req, event_ctx);
114	0	}
115	0	} else {
116	0	if (!finddcs_cldap_name_lookup(state, io, resolve_ctx,
117	0	event_ctx)) {
118	0	return tevent_req_post(req, event_ctx);
119	0	}
120	0	}
121	0	} else if (io->in.domain_name) {
122	0	if (strchr(state->domain_name, '.')) {
123		/* looks like a DNS name */
124	0	DEBUG(4,("finddcs: searching for a DC by DNS domain %s\n", state->domain_name));
125	0	if (!finddcs_cldap_srv_lookup(state, io, resolve_ctx,
126	0	event_ctx)) {
127	0	return tevent_req_post(req, event_ctx);
128	0	}
129	0	} else {
130	0	DEBUG(4,("finddcs: searching for a DC by NBT lookup %s\n", state->domain_name));
131	0	if (!finddcs_cldap_nbt_lookup(state, io, resolve_ctx,
132	0	event_ctx)) {
133	0	return tevent_req_post(req, event_ctx);
134	0	}
135	0	}
136	0	} else {
137		/* either we have the domain name or the IP address */
138	0	tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
139	0	DEBUG(2,("finddcs: Please specify at least the domain name or the IP address! \n"));
140	0	return tevent_req_post(req, event_ctx);
141	0	}
142
143	0	return req;
144	0	}
145
146
147		/*
148		we've been told the IP of the server, bypass name
149		resolution and go straight to CLDAP
150		*/
151		static bool finddcs_cldap_ipaddress(struct finddcs_cldap_state state, struct finddcs io)
152	0	{
153	0	NTSTATUS status;
154
155	0	state->srv_addresses = talloc_array(state, const char *, 2);
156	0	if (tevent_req_nomem(state->srv_addresses, state->req)) {
157	0	return false;
158	0	}
159	0	state->srv_addresses[0] = talloc_strdup(state->srv_addresses, io->in.server_address);
160	0	if (tevent_req_nomem(state->srv_addresses[0], state->req)) {
161	0	return false;
162	0	}
163	0	state->srv_addresses[1] = NULL;
164	0	state->srv_address_index = 0;
165
166	0	finddcs_cldap_next_server(state);
167	0	return tevent_req_is_nterror(state->req, &status);
168	0	}
169
170		/*
171		start a SRV DNS lookup
172		*/
173		static bool finddcs_cldap_srv_lookup(struct finddcs_cldap_state *state,
174		struct finddcs *io,
175		struct resolve_context *resolve_ctx,
176		struct tevent_context *event_ctx)
177	0	{
178	0	struct composite_context *creq;
179	0	struct nbt_name name;
180
181	0	if (io->in.site_name) {
182	0	state->srv_name = talloc_asprintf(state, "_ldap._tcp.%s._sites.%s",
183	0	io->in.site_name, io->in.domain_name);
184	0	} else {
185	0	state->srv_name = talloc_asprintf(state, "_ldap._tcp.%s", io->in.domain_name);
186	0	}
187
188	0	DEBUG(4,("finddcs: looking for SRV records for %s\n", state->srv_name));
189
190	0	make_nbt_name(&name, state->srv_name, 0);
191
192	0	creq = resolve_name_ex_send(resolve_ctx, state,
193	0	RESOLVE_NAME_FLAG_FORCE_DNS \| RESOLVE_NAME_FLAG_DNS_SRV,
194	0	0, &name, event_ctx);
195	0	if (tevent_req_nomem(creq, state->req)) {
196	0	return false;
197	0	}
198	0	creq->async.fn = finddcs_cldap_srv_resolved;
199	0	creq->async.private_data = state;
200
201	0	return true;
202	0	}
203
204		/*
205		start a NBT name lookup for domain<1C>
206		*/
207		static bool finddcs_cldap_nbt_lookup(struct finddcs_cldap_state *state,
208		struct finddcs *io,
209		struct resolve_context *resolve_ctx,
210		struct tevent_context *event_ctx)
211	0	{
212	0	struct composite_context *creq;
213	0	struct nbt_name name;
214
215	0	make_nbt_name(&name, state->domain_name, NBT_NAME_LOGON);
216	0	creq = resolve_name_send(resolve_ctx, state, &name, event_ctx);
217	0	if (tevent_req_nomem(creq, state->req)) {
218	0	return false;
219	0	}
220	0	creq->async.fn = finddcs_cldap_nbt_resolved;
221	0	creq->async.private_data = state;
222	0	return true;
223	0	}
224
225		static bool finddcs_cldap_name_lookup(struct finddcs_cldap_state *state,
226		struct finddcs *io,
227		struct resolve_context *resolve_ctx,
228		struct tevent_context *event_ctx)
229	0	{
230	0	struct composite_context *creq;
231	0	struct nbt_name name;
232
233	0	make_nbt_name(&name, io->in.server_address, NBT_NAME_SERVER);
234	0	creq = resolve_name_send(resolve_ctx, state, &name, event_ctx);
235	0	if (tevent_req_nomem(creq, state->req)) {
236	0	return false;
237	0	}
238	0	creq->async.fn = finddcs_cldap_name_resolved;
239	0	creq->async.private_data = state;
240	0	return true;
241	0	}
242
243		/*
244		fire off a CLDAP query to the next server
245		*/
246		static void finddcs_cldap_next_server(struct finddcs_cldap_state *state)
247	0	{
248	0	struct tevent_req *subreq;
249	0	struct tsocket_address **servers = NULL;
250	0	const char *realm = NULL;
251	0	size_t i, num_servers;
252	0	int ret;
253
254	0	num_servers = str_list_length(state->srv_addresses);
255
256	0	servers = talloc_array(state, struct tsocket_address *, num_servers);
257	0	if (tevent_req_nomem(servers, state->req)) {
258	0	return;
259	0	}
260
261	0	for (i = 0; i < num_servers; i++) {
262	0	ret = tsocket_address_inet_from_strings(
263	0	servers,
264	0	"ip",
265	0	state->srv_addresses[i],
266	0	389,
267	0	&servers[i]);
268	0	if (ret == -1) {
269	0	NTSTATUS status = map_nt_error_from_unix_common(errno);
270	0	tevent_req_nterror(state->req, status);
271	0	return;
272	0	}
273	0	}
274
275	0	if ((state->domain_name != NULL) && (strchr(state->domain_name, '.'))) {
276	0	realm = state->domain_name;
277	0	}
278
279	0	subreq = netlogon_pings_send(
280	0	state,
281	0	state->ev,
282	0	state->proto,
283	0	servers,
284	0	num_servers,
285	0	(struct netlogon_ping_filter){
286	0	.ntversion = NETLOGON_NT_VERSION_5 \|
287	0	NETLOGON_NT_VERSION_5EX \|
288	0	NETLOGON_NT_VERSION_IP,
289
290	0	.acct_ctrl = -1,
291	0	.domain = realm,
292	0	.domain_sid = state->domain_sid,
293	0	.required_flags = state->minimum_dc_flags,
294	0	},
295	0	1, /* min_servers */
296	0	tevent_timeval_current_ofs(2, 0));
297	0	if (tevent_req_nomem(subreq, state->req)) {
298	0	return;
299	0	}
300	0	tevent_req_set_callback(subreq, finddcs_cldap_netlogon_replied, state);
301	0	}
302
303
304		/*
305		we have a response from a CLDAP server for a netlogon request
306		*/
307		static void finddcs_cldap_netlogon_replied(struct tevent_req *subreq)
308	0	{
309	0	struct finddcs_cldap_state *state;
310	0	struct netlogon_samlogon_response **responses = NULL;
311	0	size_t i, num_responses;
312	0	NTSTATUS status;
313
314	0	state = tevent_req_callback_data(subreq, struct finddcs_cldap_state);
315
316	0	status = netlogon_pings_recv(subreq, state, &responses);
317	0	TALLOC_FREE(subreq);
318	0	if (tevent_req_nterror(state->req, status)) {
319	0	return;
320	0	}
321
322	0	num_responses = talloc_array_length(responses);
323
324	0	for (i = 0; i < num_responses; i++) {
325	0	if (responses[i] != NULL) {
326	0	state->srv_address_index = i;
327	0	state->response = responses[i];
328	0	}
329	0	}
330
331	0	if (state->response == NULL) {
332	0	tevent_req_nterror(state->req,
333	0	NT_STATUS_OBJECT_NAME_NOT_FOUND);
334	0	return;
335	0	}
336
337	0	map_netlogon_samlogon_response(state->response);
338
339	0	DEBUG(4,("finddcs: Found matching DC %s with server_type=0x%08x\n",
340	0	state->srv_addresses[state->srv_address_index],
341	0	state->response->data.nt5_ex.server_type));
342
343	0	tevent_req_done(state->req);
344	0	}
345
346		static void finddcs_cldap_name_resolved(struct composite_context *ctx)
347	0	{
348	0	struct finddcs_cldap_state *state =
349	0	talloc_get_type(ctx->async.private_data, struct finddcs_cldap_state);
350	0	NTSTATUS status;
351	0	unsigned i;
352
353	0	status = resolve_name_multiple_recv(ctx, state, &state->srv_addresses);
354	0	if (tevent_req_nterror(state->req, status)) {
355	0	DEBUG(2,("finddcs: No matching server found\n"));
356	0	return;
357	0	}
358
359	0	for (i=0; state->srv_addresses[i]; i++) {
360	0	DEBUG(4,("finddcs: response %u at '%s'\n",
361	0	i, state->srv_addresses[i]));
362	0	}
363
364	0	state->srv_address_index = 0;
365
366	0	state->status = NT_STATUS_OK;
367	0	finddcs_cldap_next_server(state);
368	0	}
369
370		/*
371		handle NBT name lookup reply
372		*/
373		static void finddcs_cldap_nbt_resolved(struct composite_context *ctx)
374	0	{
375	0	struct finddcs_cldap_state *state =
376	0	talloc_get_type(ctx->async.private_data, struct finddcs_cldap_state);
377	0	NTSTATUS status;
378	0	unsigned i;
379
380	0	status = resolve_name_multiple_recv(ctx, state, &state->srv_addresses);
381	0	if (tevent_req_nterror(state->req, status)) {
382	0	DEBUG(2,("finddcs: No matching NBT <1c> server found\n"));
383	0	return;
384	0	}
385
386	0	for (i=0; state->srv_addresses[i]; i++) {
387	0	DEBUG(4,("finddcs: NBT <1c> response %u at '%s'\n",
388	0	i, state->srv_addresses[i]));
389	0	}
390
391	0	state->srv_address_index = 0;
392
393	0	finddcs_cldap_next_server(state);
394	0	}
395
396
397		/*
398		* Having got a DNS SRV answer, fire off the first CLDAP request
399		*/
400		static void finddcs_cldap_srv_resolved(struct composite_context *ctx)
401	0	{
402	0	struct finddcs_cldap_state *state =
403	0	talloc_get_type(ctx->async.private_data, struct finddcs_cldap_state);
404	0	NTSTATUS status;
405	0	unsigned i;
406
407	0	status = resolve_name_multiple_recv(ctx, state, &state->srv_addresses);
408	0	if (tevent_req_nterror(state->req, status)) {
409	0	DEBUG(2,("finddcs: Failed to find SRV record for %s\n", state->srv_name));
410	0	return;
411	0	}
412
413	0	for (i=0; state->srv_addresses[i]; i++) {
414	0	DEBUG(4,("finddcs: DNS SRV response %u at '%s'\n", i, state->srv_addresses[i]));
415	0	}
416
417	0	state->srv_address_index = 0;
418
419	0	state->status = NT_STATUS_OK;
420	0	finddcs_cldap_next_server(state);
421	0	}
422
423
424		NTSTATUS finddcs_cldap_recv(struct tevent_req req, TALLOC_CTX mem_ctx, struct finddcs *io)
425	0	{
426	0	struct finddcs_cldap_state *state = tevent_req_data(req, struct finddcs_cldap_state);
427	0	bool ok;
428	0	NTSTATUS status;
429
430	0	ok = tevent_req_poll(req, state->ev);
431	0	if (!ok) {
432	0	talloc_free(req);
433	0	return NT_STATUS_INTERNAL_ERROR;
434	0	}
435	0	if (tevent_req_is_nterror(req, &status)) {
436	0	tevent_req_received(req);
437	0	return status;
438	0	}
439
440	0	io->out.netlogon = talloc_move(mem_ctx, &state->response);
441	0	io->out.address = talloc_steal(
442	0	mem_ctx, state->srv_addresses[state->srv_address_index]);
443
444	0	tevent_req_received(req);
445	0	return NT_STATUS_OK;
446	0	}
447
448		NTSTATUS finddcs_cldap(TALLOC_CTX *mem_ctx,
449		struct finddcs *io,
450		struct resolve_context *resolve_ctx,
451		struct tevent_context *event_ctx)
452	0	{
453	0	NTSTATUS status;
454	0	struct tevent_req *req = finddcs_cldap_send(mem_ctx,
455	0	io,
456	0	resolve_ctx,
457	0	event_ctx);
458	0	status = finddcs_cldap_recv(req, mem_ctx, io);
459		talloc_free(req);
460	0	return status;
461	0	}