source3/winbindd/winbindd_wins.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon - WINS related functions
   5
   6    Copyright (C) Andrew Tridgell 1999
   7    Copyright (C) Herb Lewis 2002
   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 "includes.h"
  24 #include "winbindd.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_WINBIND
  28
  29 static struct node_status *lookup_byaddr_backend(TALLOC_CTX *mem_ctx,
  30                                                  const char *addr, int *count)
  31 {
  32         struct sockaddr_storage ss;
  33         struct nmb_name nname;
  34         struct node_status *result;
  35         NTSTATUS status;
  36
  37         make_nmb_name(&nname, "*", 0);
  38         if (!interpret_string_addr(&ss, addr, AI_NUMERICHOST)) {
  39                 return NULL;
  40         }
  41         status = node_status_query(mem_ctx, &nname, &ss,
  42                                    &result, count, NULL);
  43         if (!NT_STATUS_IS_OK(status)) {
  44                 return NULL;
  45         }
  46         return result;
  47 }
  48
  49 static struct sockaddr_storage *lookup_byname_backend(TALLOC_CTX *mem_ctx,
  50                                                       const char *name,
  51                                                       int *count)
  52 {
  53         struct ip_service *ret = NULL;
  54         struct sockaddr_storage *return_ss = NULL;
  55         int j, i;
  56         NTSTATUS status;
  57
  58         *count = 0;
  59
  60         /* always try with wins first */
  61         if (NT_STATUS_IS_OK(resolve_wins(name,0x20,&ret,count))) {
  62                 if ( *count == 0 )
  63                         return NULL;
  64                 return_ss = TALLOC_ARRAY(mem_ctx, struct sockaddr_storage,
  65                                          *count);
  66                 if (return_ss == NULL ) {
  67                         free( ret );
  68                         return NULL;
  69                 }
  70
  71                 /* copy the IP addresses */
  72                 for ( i=0; i<(*count); i++ )
  73                         return_ss[i] = ret[i].ss;
  74
  75                 free( ret );
  76                 return return_ss;
  77         }
  78
  79         /* uggh, we have to broadcast to each interface in turn */
  80         for (j=iface_count() - 1;
  81              j >= 0;
  82              j--) {
  83                 const struct sockaddr_storage *bcast_ss = iface_n_bcast(j);
  84                 if (!bcast_ss) {
  85                         continue;
  86                 }
  87                 status = name_query(name, 0x20, True, True,bcast_ss,
  88                                     mem_ctx, &return_ss, count, NULL);
  89                 if (NT_STATUS_IS_OK(status)) {
  90                         break;
  91                 }
  92         }
  93
  94         return return_ss;
  95 }
  96
  97 /* Get hostname from IP  */
  98
  99 void winbindd_wins_byip(struct winbindd_cli_state *state)
 100 {
 101         fstring response;
 102         int i, count, maxlen, size;
 103         struct node_status *status;
 104
 105         /* Ensure null termination */
 106         state->request->data.winsreq[sizeof(state->request->data.winsreq)-1]='\0';
 107
 108         DEBUG(3, ("[%5lu]: wins_byip %s\n", (unsigned long)state->pid,
 109                 state->request->data.winsreq));
 110
 111         *response = '\0';
 112         maxlen = sizeof(response) - 1;
 113
 114         if ((status = lookup_byaddr_backend(
 115                      state->mem_ctx, state->request->data.winsreq, &count))) {
 116             size = strlen(state->request->data.winsreq);
 117             if (size > maxlen) {
 118                 TALLOC_FREE(status);
 119                 request_error(state);
 120                 return;
 121             }
 122             fstrcat(response,state->request->data.winsreq);
 123             fstrcat(response,"\t");
 124             for (i = 0; i < count; i++) {
 125                 /* ignore group names */
 126                 if (status[i].flags & 0x80) continue;
 127                 if (status[i].type == 0x20) {
 128                         size = sizeof(status[i].name) + strlen(response);
 129                         if (size > maxlen) {
 130                             TALLOC_FREE(status);
 131                             request_error(state);
 132                             return;
 133                         }
 134                         fstrcat(response, status[i].name);
 135                         fstrcat(response, " ");
 136                 }
 137             }
 138             /* make last character a newline */
 139             response[strlen(response)-1] = '\n';
 140             TALLOC_FREE(status);
 141         }
 142         fstrcpy(state->response->data.winsresp,response);
 143         request_ok(state);
 144 }
 145
 146 /* Get IP from hostname */
 147
 148 void winbindd_wins_byname(struct winbindd_cli_state *state)
 149 {
 150         struct sockaddr_storage *ip_list = NULL;
 151         int i, count, maxlen, size;
 152         fstring response;
 153         char addr[INET6_ADDRSTRLEN];
 154
 155         /* Ensure null termination */
 156         state->request->data.winsreq[sizeof(state->request->data.winsreq)-1]='\0';
 157
 158         DEBUG(3, ("[%5lu]: wins_byname %s\n", (unsigned long)state->pid,
 159                 state->request->data.winsreq));
 160
 161         *response = '\0';
 162         maxlen = sizeof(response) - 1;
 163
 164         ip_list = lookup_byname_backend(
 165                 state->mem_ctx, state->request->data.winsreq, &count);
 166         if (ip_list != NULL){
 167                 for (i = count; i ; i--) {
 168                         print_sockaddr(addr, sizeof(addr), &ip_list[i-1]);
 169                         size = strlen(addr);
 170                         if (size > maxlen) {
 171                                 TALLOC_FREE(ip_list);
 172                                 request_error(state);
 173                                 return;
 174                         }
 175                         if (i != 0) {
 176                                 /* Clear out the newline character */
 177                                 /* But only if there is something in there,
 178                                 otherwise we clobber something in the stack */
 179                                 if (strlen(response)) {
 180                                         response[strlen(response)-1] = ' ';
 181                                 }
 182                         }
 183                         fstrcat(response,addr);
 184                         fstrcat(response,"\t");
 185                 }
 186                 size = strlen(state->request->data.winsreq) + strlen(response);
 187                 if (size > maxlen) {
 188                     TALLOC_FREE(ip_list);
 189                     request_error(state);
 190                     return;
 191                 }
 192                 fstrcat(response,state->request->data.winsreq);
 193                 fstrcat(response,"\n");
 194                 TALLOC_FREE(ip_list);
 195         } else {
 196                 request_error(state);
 197                 return;
 198         }
 199
 200         fstrcpy(state->response->data.winsresp,response);
 201
 202         request_ok(state);
 203 }