LCOV - code coverage report
Current view: top level - source4/libnet - libnet_lookup.c (source / functions) Hit Total Coverage
Test: coverage report for master 469b22b8 Lines: 147 186 79.0 %
Date: 2024-06-10 12:05:21 Functions: 15 15 100.0 %

          Line data    Source code
       1             : /* 
       2             :    Unix SMB/CIFS implementation.
       3             : 
       4             :    Copyright (C) Rafal Szczesniak 2005
       5             :    
       6             :    This program is free software; you can redistribute it and/or modify
       7             :    it under the terms of the GNU General Public License as published by
       8             :    the Free Software Foundation; either version 3 of the License, or
       9             :    (at your option) any later version.
      10             :    
      11             :    This program is distributed in the hope that it will be useful,
      12             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             :    GNU General Public License for more details.
      15             :    
      16             :    You should have received a copy of the GNU General Public License
      17             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.
      18             : */
      19             : 
      20             : /*
      21             :   a composite function for name resolving
      22             : */
      23             : 
      24             : #include "includes.h"
      25             : #include "libnet/libnet.h"
      26             : #include "libcli/composite/composite.h"
      27             : #include "auth/credentials/credentials.h"
      28             : #include "libcli/resolve/resolve.h"
      29             : #include "libcli/finddc.h"
      30             : #include "libcli/security/security.h"
      31             : #include "librpc/gen_ndr/ndr_lsa_c.h"
      32             : #include "param/param.h"
      33             : 
      34             : struct lookup_state {
      35             :         struct nbt_name hostname;
      36             :         const char *address;
      37             : };
      38             : 
      39             : 
      40             : static void continue_name_resolved(struct composite_context *ctx);
      41             : 
      42             : 
      43             : /**
      44             :  * Sends asynchronous Lookup request
      45             :  *
      46             :  * @param io arguments and result of the call
      47             :  */
      48             : 
      49           2 : struct composite_context *libnet_Lookup_send(struct libnet_context *ctx,
      50             :                                              TALLOC_CTX *mem_ctx,
      51             :                                              struct libnet_Lookup *io)
      52             : {
      53           0 :         struct composite_context *c;
      54           0 :         struct lookup_state *s;
      55           0 :         struct composite_context *cresolve_req;
      56           0 :         struct resolve_context *resolve_ctx;
      57             : 
      58             :         /* allocate context and state structures */
      59           2 :         c = composite_create(mem_ctx, ctx->event_ctx);
      60           2 :         if (c == NULL) return NULL;
      61             : 
      62           2 :         s = talloc_zero(c, struct lookup_state);
      63           2 :         if (composite_nomem(s, c)) return c;
      64             : 
      65           2 :         c->private_data      = s;
      66             : 
      67           2 :         if (io == NULL || io->in.hostname == NULL) {
      68           0 :                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
      69           0 :                 return c;
      70             :         }
      71             : 
      72             :         /* parameters */
      73           2 :         s->hostname.name   = talloc_strdup(s, io->in.hostname);
      74           2 :         if (composite_nomem(s->hostname.name, c)) return c;
      75             : 
      76           2 :         s->hostname.type   = io->in.type;
      77           2 :         s->hostname.scope  = NULL;
      78             : 
      79             :         /* name resolution methods */
      80           2 :         if (io->in.resolve_ctx) {
      81           0 :                 resolve_ctx = io->in.resolve_ctx;
      82             :         } else {
      83           2 :                 resolve_ctx = ctx->resolve_ctx;
      84             :         }
      85             : 
      86             :         /* send resolve request */
      87           2 :         cresolve_req = resolve_name_send(resolve_ctx, s, &s->hostname, c->event_ctx);
      88           2 :         if (composite_nomem(cresolve_req, c)) return c;
      89             : 
      90           2 :         composite_continue(c, cresolve_req, continue_name_resolved, c);
      91           2 :         return c;
      92             : }
      93             : 
      94             : 
      95           2 : static void continue_name_resolved(struct composite_context *ctx)
      96             : {
      97           0 :         struct composite_context *c;
      98           0 :         struct lookup_state *s;
      99             : 
     100           2 :         c = talloc_get_type(ctx->async.private_data, struct composite_context);
     101           2 :         s = talloc_get_type(c->private_data, struct lookup_state);
     102             : 
     103           2 :         c->status = resolve_name_recv(ctx, s, &s->address);
     104             :         
     105           2 :         composite_done(c);
     106           2 : }
     107             : 
     108             : 
     109             : /**
     110             :  * Waits for and receives results of asynchronous Lookup call
     111             :  *
     112             :  * @param c composite context returned by asynchronous Lookup call
     113             :  * @param mem_ctx memory context of the call
     114             :  * @param io pointer to results (and arguments) of the call
     115             :  * @return nt status code of execution
     116             :  */
     117             : 
     118           2 : NTSTATUS libnet_Lookup_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
     119             :                             struct libnet_Lookup *io)
     120             : {
     121           0 :         NTSTATUS status;
     122           0 :         struct lookup_state *s;
     123             : 
     124           2 :         status = composite_wait(c);
     125           2 :         if (NT_STATUS_IS_OK(status)) {
     126           0 :                 char **address;
     127             : 
     128           2 :                 s = talloc_get_type(c->private_data, struct lookup_state);
     129             : 
     130           2 :                 address = str_list_make_single(mem_ctx, s->address);
     131           2 :                 NT_STATUS_HAVE_NO_MEMORY(address);
     132           2 :                 io->out.address = discard_const_p(const char *, address);
     133             :         }
     134             : 
     135           2 :         talloc_free(c);
     136           2 :         return status;
     137             : }
     138             : 
     139             : 
     140             : /**
     141             :  * Synchronous version of Lookup call
     142             :  *
     143             :  * @param mem_ctx memory context for the call
     144             :  * @param io arguments and results of the call
     145             :  * @return nt status code of execution
     146             :  */
     147             : 
     148           1 : NTSTATUS libnet_Lookup(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
     149             :                        struct libnet_Lookup *io)
     150             : {
     151           1 :         struct composite_context *c = libnet_Lookup_send(ctx, mem_ctx, io);
     152           1 :         return libnet_Lookup_recv(c, mem_ctx, io);
     153             : }
     154             : 
     155             : 
     156             : /*
     157             :  * Shortcut functions to find common types of name
     158             :  * (and skip nbt name type argument)
     159             :  */
     160             : 
     161             : 
     162             : /**
     163             :  * Sends asynchronous LookupHost request
     164             :  */
     165           1 : struct composite_context* libnet_LookupHost_send(struct libnet_context *ctx,
     166             :                                                  TALLOC_CTX *mem_ctx,
     167             :                                                  struct libnet_Lookup *io)
     168             : {
     169           1 :         io->in.type = NBT_NAME_SERVER;
     170           1 :         return libnet_Lookup_send(ctx, mem_ctx, io);
     171             : }
     172             : 
     173             : 
     174             : 
     175             : /**
     176             :  * Synchronous version of LookupHost call
     177             :  */
     178           1 : NTSTATUS libnet_LookupHost(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
     179             :                            struct libnet_Lookup *io)
     180             : {
     181           1 :         struct composite_context *c = libnet_LookupHost_send(ctx, mem_ctx, io);
     182           1 :         return libnet_Lookup_recv(c, mem_ctx, io);
     183             : }
     184             : 
     185             : 
     186             : /**
     187             :  * Sends asynchronous LookupDCs request
     188             :  */
     189         210 : struct tevent_req *libnet_LookupDCs_send(struct libnet_context *ctx,
     190             :                                          TALLOC_CTX *mem_ctx,
     191             :                                          struct libnet_LookupDCs *io)
     192             : {
     193           0 :         struct tevent_req *req;
     194           0 :         struct finddcs finddcs_io;
     195             : 
     196         210 :         ZERO_STRUCT(finddcs_io);
     197             : 
     198         210 :         if (strcasecmp_m(io->in.domain_name, lpcfg_workgroup(ctx->lp_ctx)) == 0) {
     199         203 :                 finddcs_io.in.domain_name = lpcfg_dnsdomain(ctx->lp_ctx);
     200             :         } else {
     201           7 :                 finddcs_io.in.domain_name = io->in.domain_name;
     202             :         }
     203         210 :         finddcs_io.in.minimum_dc_flags = NBT_SERVER_LDAP | NBT_SERVER_DS | NBT_SERVER_WRITABLE;
     204         210 :         finddcs_io.in.server_address = ctx->server_address;
     205             : 
     206         210 :         req = finddcs_cldap_send(mem_ctx, &finddcs_io, ctx->resolve_ctx, ctx->event_ctx);
     207         210 :         return req;
     208             : }
     209             : 
     210             : /**
     211             :  * Waits for and receives results of asynchronous Lookup call
     212             :  *
     213             :  * @param c composite context returned by asynchronous Lookup call
     214             :  * @param mem_ctx memory context of the call
     215             :  * @param io pointer to results (and arguments) of the call
     216             :  * @return nt status code of execution
     217             :  */
     218             : 
     219         210 : NTSTATUS libnet_LookupDCs_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
     220             :                                struct libnet_LookupDCs *io)
     221             : {
     222           0 :         NTSTATUS status;
     223           0 :         struct finddcs finddcs_io;
     224         210 :         status = finddcs_cldap_recv(req, mem_ctx, &finddcs_io);
     225         210 :         talloc_free(req);
     226         210 :         io->out.num_dcs = 1;
     227         210 :         io->out.dcs = talloc(mem_ctx, struct nbt_dc_name);
     228         210 :         NT_STATUS_HAVE_NO_MEMORY(io->out.dcs);
     229         210 :         io->out.dcs[0].address = finddcs_io.out.address;
     230         210 :         io->out.dcs[0].name = finddcs_io.out.netlogon.data.nt5_ex.pdc_dns_name;
     231         210 :         return status;
     232             : }
     233             : 
     234             : 
     235             : /**
     236             :  * Synchronous version of LookupDCs
     237             :  */
     238           1 : NTSTATUS libnet_LookupDCs(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
     239             :                           struct libnet_LookupDCs *io)
     240             : {
     241           1 :         struct tevent_req *req = libnet_LookupDCs_send(ctx, mem_ctx, io);
     242           1 :         return libnet_LookupDCs_recv(req, mem_ctx, io);
     243             : }
     244             : 
     245             : 
     246             : struct lookup_name_state {
     247             :         struct libnet_context *ctx;
     248             :         const char *name;
     249             :         uint32_t count;
     250             :         struct libnet_DomainOpen domopen;
     251             :         struct lsa_LookupNames lookup;
     252             :         struct lsa_TransSidArray sids;
     253             :         struct lsa_String *names;
     254             : 
     255             :         /* information about the progress */
     256             :         void (*monitor_fn)(struct monitor_msg *);
     257             : };
     258             : 
     259             : 
     260             : static bool prepare_lookup_params(struct libnet_context *ctx,
     261             :                                   struct composite_context *c,
     262             :                                   struct lookup_name_state *s);
     263             : static void continue_lookup_name(struct composite_context *ctx);
     264             : static void continue_name_found(struct tevent_req *subreq);
     265             : 
     266             : 
     267          13 : struct composite_context* libnet_LookupName_send(struct libnet_context *ctx,
     268             :                                                  TALLOC_CTX *mem_ctx,
     269             :                                                  struct libnet_LookupName *io,
     270             :                                                  void (*monitor)(struct monitor_msg*))
     271             : {
     272           0 :         struct composite_context *c;
     273           0 :         struct lookup_name_state *s;
     274           0 :         struct tevent_req *subreq;
     275          13 :         bool prereq_met = false;
     276             : 
     277          13 :         c = composite_create(mem_ctx, ctx->event_ctx);
     278          13 :         if (c == NULL) return NULL;
     279             : 
     280          13 :         s = talloc_zero(c, struct lookup_name_state);
     281          13 :         if (composite_nomem(s, c)) return c;
     282             : 
     283          13 :         c->private_data = s;
     284             :         
     285          13 :         s->name = talloc_strdup(c, io->in.name);
     286          13 :         s->monitor_fn = monitor;
     287          13 :         s->ctx = ctx;
     288             : 
     289          13 :         prereq_met = lsa_domain_opened(ctx, c, io->in.domain_name, &c, &s->domopen,
     290             :                                        continue_lookup_name, monitor);
     291          13 :         if (!prereq_met) return c;
     292             : 
     293           9 :         if (!prepare_lookup_params(ctx, c, s)) return c;
     294             : 
     295           9 :         subreq = dcerpc_lsa_LookupNames_r_send(s, c->event_ctx,
     296           9 :                                                ctx->lsa.pipe->binding_handle,
     297             :                                                &s->lookup);
     298           9 :         if (composite_nomem(subreq, c)) return c;
     299             : 
     300           9 :         tevent_req_set_callback(subreq, continue_name_found, c);
     301           9 :         return c;
     302             : }
     303             : 
     304             : 
     305          13 : static bool prepare_lookup_params(struct libnet_context *ctx,
     306             :                                   struct composite_context *c,
     307             :                                   struct lookup_name_state *s)
     308             : {
     309          13 :         const int single_name = 1;
     310             : 
     311          13 :         s->sids.count = 0;
     312          13 :         s->sids.sids  = NULL;
     313             :         
     314          13 :         s->names = talloc_array(s, struct lsa_String, single_name);
     315          13 :         if (composite_nomem(s->names, c)) return false;
     316          13 :         s->names[0].string = s->name;
     317             :         
     318          13 :         s->lookup.in.handle    = &ctx->lsa.handle;
     319          13 :         s->lookup.in.num_names = single_name;
     320          13 :         s->lookup.in.names     = s->names;
     321          13 :         s->lookup.in.sids      = &s->sids;
     322          13 :         s->lookup.in.level     = 1;
     323          13 :         s->lookup.in.count     = &s->count;
     324          13 :         s->lookup.out.count    = &s->count;
     325          13 :         s->lookup.out.sids     = &s->sids;
     326          13 :         s->lookup.out.domains  = talloc_zero(s, struct lsa_RefDomainList *);
     327          13 :         if (composite_nomem(s->lookup.out.domains, c)) return false;
     328             :         
     329          13 :         return true;
     330             : }
     331             : 
     332             : 
     333           4 : static void continue_lookup_name(struct composite_context *ctx)
     334             : {
     335           0 :         struct composite_context *c;
     336           0 :         struct lookup_name_state *s;
     337           0 :         struct tevent_req *subreq;
     338             : 
     339           4 :         c = talloc_get_type(ctx->async.private_data, struct composite_context);
     340           4 :         s = talloc_get_type(c->private_data, struct lookup_name_state);
     341             : 
     342           4 :         c->status = libnet_DomainOpen_recv(ctx, s->ctx, c, &s->domopen);
     343           4 :         if (!composite_is_ok(c)) return;
     344             :         
     345           4 :         if (!prepare_lookup_params(s->ctx, c, s)) return;
     346             : 
     347           4 :         subreq = dcerpc_lsa_LookupNames_r_send(s, c->event_ctx,
     348           4 :                                                s->ctx->lsa.pipe->binding_handle,
     349             :                                                &s->lookup);
     350           4 :         if (composite_nomem(subreq, c)) return;
     351             :         
     352           4 :         tevent_req_set_callback(subreq, continue_name_found, c);
     353             : }
     354             : 
     355             : 
     356          13 : static void continue_name_found(struct tevent_req *subreq)
     357             : {
     358           0 :         struct composite_context *c;
     359           0 :         struct lookup_name_state *s;
     360             : 
     361          13 :         c = tevent_req_callback_data(subreq, struct composite_context);
     362          13 :         s = talloc_get_type(c->private_data, struct lookup_name_state);
     363             : 
     364          13 :         c->status = dcerpc_lsa_LookupNames_r_recv(subreq, s);
     365          13 :         TALLOC_FREE(subreq);
     366          13 :         if (!composite_is_ok(c)) return;
     367             : 
     368          13 :         c->status = s->lookup.out.result;
     369          13 :         if (!composite_is_ok(c)) return;
     370             : 
     371          13 :         if (s->lookup.out.sids->count != s->lookup.in.num_names) {
     372           0 :                 composite_error(c, NT_STATUS_INVALID_NETWORK_RESPONSE);
     373           0 :                 return;
     374             :         }
     375             : 
     376          13 :         composite_done(c);
     377             : }
     378             : 
     379             : 
     380          13 : NTSTATUS libnet_LookupName_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
     381             :                                 struct libnet_LookupName *io)
     382             : {
     383           0 :         NTSTATUS status;
     384          13 :         struct lookup_name_state *s = NULL;
     385          13 :         struct lsa_RefDomainList *domains = NULL;
     386          13 :         struct lsa_TransSidArray *sids = NULL;
     387             : 
     388          13 :         status = composite_wait(c);
     389          13 :         ZERO_STRUCT(io->out);
     390             : 
     391          13 :         if (!NT_STATUS_IS_OK(status)) {
     392           0 :                 io->out.error_string = talloc_asprintf(mem_ctx, "Error: %s",
     393             :                                                        nt_errstr(status));
     394           0 :                 goto done;
     395             :         }
     396             : 
     397          13 :         s = talloc_get_type(c->private_data, struct lookup_name_state);
     398             : 
     399          13 :         if (*s->lookup.out.count == 0) {
     400           0 :                 goto success;
     401             :         }
     402             : 
     403          13 :         domains = *s->lookup.out.domains;
     404          13 :         sids = s->lookup.out.sids;
     405             : 
     406          13 :         if (domains == NULL || sids == NULL) {
     407           0 :                 status = NT_STATUS_UNSUCCESSFUL;
     408           0 :                 io->out.error_string = talloc_asprintf(mem_ctx, "Error: %s",
     409             :                                                        nt_errstr(status));
     410           0 :                 goto done;
     411             :         }
     412             : 
     413          13 :         if (sids->count == 0) {
     414           0 :                 goto success;
     415             :         }
     416             : 
     417          13 :         io->out.rid        = sids->sids[0].rid;
     418          13 :         io->out.sid_type   = sids->sids[0].sid_type;
     419          13 :         if (domains->count > 0) {
     420          26 :                 io->out.sid = dom_sid_add_rid(mem_ctx, domains->domains[0].sid,
     421          13 :                                               io->out.rid);
     422          13 :                 if (io->out.sid == NULL) {
     423           0 :                         status = NT_STATUS_NO_MEMORY;
     424           0 :                         goto done;
     425             :                 }
     426          13 :                 io->out.sidstr = dom_sid_string(mem_ctx, io->out.sid);
     427          13 :                 if (io->out.sidstr == NULL) {
     428           0 :                         status = NT_STATUS_NO_MEMORY;
     429           0 :                         goto done;
     430             :                 }
     431             :         }
     432             : 
     433          13 : success:
     434          13 :         io->out.error_string = talloc_strdup(mem_ctx, "Success");
     435          13 : done:
     436          13 :         talloc_free(c);
     437          13 :         return status;
     438             : }
     439             : 
     440             : 
     441           1 : NTSTATUS libnet_LookupName(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
     442             :                            struct libnet_LookupName *io)
     443             : {
     444           0 :         struct composite_context *c;
     445             :         
     446           1 :         c = libnet_LookupName_send(ctx, mem_ctx, io, NULL);
     447           1 :         return libnet_LookupName_recv(c, mem_ctx, io);
     448             : }

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