Line data    Source code

       1             : /*
       2             :    Unix SMB/CIFS implementation.
       3             :    async implementation of WINBINDD_WINS_BYIP
       4             :    Copyright (C) Volker Lendecke 2011
       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             : #include "includes.h"
      21             : #include "winbindd.h"
      22             : #include "libsmb/namequery.h"
      23             : #include "librpc/gen_ndr/ndr_winbind_c.h"
      24             : #include "libsmb/nmblib.h"
      25             : #include "lib/util/string_wrappers.h"
      26             : 
      27             : struct winbindd_wins_byip_state {
      28             :         struct nmb_name star;
      29             :         struct sockaddr_storage addr;
      30             :         fstring response;
      31             : };
      32             : 
      33             : static void winbindd_wins_byip_done(struct tevent_req *subreq);
      34             : 
      35           4 : struct tevent_req *winbindd_wins_byip_send(TALLOC_CTX *mem_ctx,
      36             :                                            struct tevent_context *ev,
      37             :                                            struct winbindd_cli_state *cli,
      38             :                                            struct winbindd_request *request)
      39             : {
      40           0 :         struct tevent_req *req, *subreq;
      41           0 :         struct winbindd_wins_byip_state *state;
      42             : 
      43           4 :         req = tevent_req_create(mem_ctx, &state,
      44             :                                 struct winbindd_wins_byip_state);
      45           4 :         if (req == NULL) {
      46           0 :                 return NULL;
      47             :         }
      48             :         /* Ensure null termination */
      49           4 :         request->data.winsreq[sizeof(request->data.winsreq)-1]='\0';
      50             : 
      51           4 :         fstr_sprintf(state->response, "%s\t", request->data.winsreq);
      52             : 
      53           4 :         D_NOTICE("[%s (%u)] Winbind external command WINS_BYIP start.\n"
      54             :                  "Resolving wins byip for %s.\n",
      55             :                  cli->client_name,
      56             :                  (unsigned int)cli->pid,
      57             :                  request->data.winsreq);
      58             : 
      59           4 :         make_nmb_name(&state->star, "*", 0);
      60             : 
      61           4 :         if (!interpret_string_addr(&state->addr, request->data.winsreq,
      62             :                                    AI_NUMERICHOST)) {
      63           0 :                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
      64           0 :                 return tevent_req_post(req, ev);
      65             :         }
      66             : 
      67           4 :         subreq = node_status_query_send(state, ev, &state->star,
      68           4 :                                         &state->addr);
      69           4 :         if (tevent_req_nomem(subreq, req)) {
      70           0 :                 return tevent_req_post(req, ev);
      71             :         }
      72           4 :         tevent_req_set_callback(subreq, winbindd_wins_byip_done, req);
      73           4 :         return req;
      74             : }
      75             : 
      76           4 : static void winbindd_wins_byip_done(struct tevent_req *subreq)
      77             : {
      78           4 :         struct tevent_req *req = tevent_req_callback_data(
      79             :                 subreq, struct tevent_req);
      80           4 :         struct winbindd_wins_byip_state *state = tevent_req_data(
      81             :                 req, struct winbindd_wins_byip_state);
      82           0 :         struct node_status *names;
      83           0 :         size_t i;
      84           4 :         size_t num_names = 0;
      85           0 :         NTSTATUS status;
      86             : 
      87           4 :         status = node_status_query_recv(subreq, talloc_tos(), &names,
      88             :                                         &num_names, NULL);
      89           4 :         TALLOC_FREE(subreq);
      90           4 :         if (tevent_req_nterror(req, status)) {
      91           0 :                 return;
      92             :         }
      93             : 
      94          48 :         for (i=0; i<num_names; i++) {
      95           0 :                 size_t size;
      96             :                 /*
      97             :                  * ignore group names
      98             :                  */
      99          44 :                 if (names[i].flags & 0x80) {
     100          12 :                         continue;
     101             :                 }
     102             :                 /*
     103             :                  * Only report 0x20
     104             :                  */
     105          32 :                 if (names[i].type != 0x20) {
     106          24 :                         continue;
     107             :                 }
     108             : 
     109           8 :                 D_DEBUG("Got name '%s'.\n", names[i].name);
     110             : 
     111           8 :                 size = strlen(names[i].name + strlen(state->response));
     112           8 :                 if (size > sizeof(state->response) - 1) {
     113           0 :                         D_WARNING("Too much data!\n");
     114           0 :                         tevent_req_nterror(req, STATUS_BUFFER_OVERFLOW);
     115           0 :                         return;
     116             :                 }
     117           8 :                 fstrcat(state->response, names[i].name);
     118           8 :                 fstrcat(state->response, " ");
     119             :         }
     120           4 :         state->response[strlen(state->response)-1] = '\n';
     121             : 
     122             : 
     123           4 :         TALLOC_FREE(names);
     124           4 :         tevent_req_done(req);
     125             : }
     126             : 
     127           4 : NTSTATUS winbindd_wins_byip_recv(struct tevent_req *req,
     128             :                                  struct winbindd_response *presp)
     129             : {
     130           4 :         struct winbindd_wins_byip_state *state = tevent_req_data(
     131             :                 req, struct winbindd_wins_byip_state);
     132           0 :         NTSTATUS status;
     133             : 
     134           4 :         if (tevent_req_is_nterror(req, &status)) {
     135           0 :                 return status;
     136             :         }
     137           4 :         D_NOTICE("Winbind external command WINS_BYIP end.\n"
     138             :                  "Response: %s",
     139             :                  state->response);
     140           4 :         fstrcpy(presp->data.winsresp, state->response);
     141           4 :         return NT_STATUS_OK;
     142             : }