source4/winbind/wb_samba3_protocol.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main winbindd samba3 server routines
   4
   5    Copyright (C) Stefan Metzmacher      2005
   6    Copyright (C) Volker Lendecke        2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "winbind/wb_server.h"
  24 #include "smbd/service_stream.h"
  25 #include "lib/stream/packet.h"
  26 #include "lib/tsocket/tsocket.h"
  27
  28 /*
  29   work out if a packet is complete for protocols that use a 32 bit host byte
  30   order length
  31 */
  32 NTSTATUS wbsrv_samba3_packet_full_request(void *private_data, DATA_BLOB blob, size_t *size)
  33 {
  34         uint32_t *len;
  35         if (blob.length < 4) {
  36                 return STATUS_MORE_ENTRIES;
  37         }
  38         len = (uint32_t *)blob.data;
  39         *size = (*len);
  40         if (*size > blob.length) {
  41                 return STATUS_MORE_ENTRIES;
  42         }
  43         return NT_STATUS_OK;
  44 }
  45
  46
  47 NTSTATUS wbsrv_samba3_pull_request(struct wbsrv_samba3_call *call)
  48 {
  49         if (call->in.length != sizeof(*call->request)) {
  50                 DEBUG(0,("wbsrv_samba3_pull_request: invalid blob length %lu should be %lu\n"
  51                          " make sure you use the correct winbind client tools!\n",
  52                          (long)call->in.length, (long)sizeof(*call->request)));
  53                 return NT_STATUS_INVALID_PARAMETER;
  54         }
  55
  56         call->request = talloc_zero(call, struct winbindd_request);
  57         NT_STATUS_HAVE_NO_MEMORY(call->request);
  58
  59         /* the packet layout is the same as the in memory layout of the request, so just copy it */
  60         memcpy(call->request, call->in.data, sizeof(*call->request));
  61
  62         return NT_STATUS_OK;
  63 }
  64
  65 NTSTATUS wbsrv_samba3_handle_call(struct wbsrv_samba3_call *s3call)
  66 {
  67         DEBUG(10, ("Got winbind samba3 request %d\n", s3call->request->cmd));
  68
  69         s3call->response = talloc_zero(s3call, struct winbindd_response);
  70         NT_STATUS_HAVE_NO_MEMORY(s3call->request);
  71
  72         s3call->response->length = sizeof(*s3call->response);
  73
  74         switch(s3call->request->cmd) {
  75         case WINBINDD_INTERFACE_VERSION:
  76                 return wbsrv_samba3_interface_version(s3call);
  77
  78         case WINBINDD_CHECK_MACHACC:
  79                 return wbsrv_samba3_check_machacc(s3call);
  80
  81         case WINBINDD_PING:
  82                 return wbsrv_samba3_ping(s3call);
  83
  84         case WINBINDD_INFO:
  85                 return wbsrv_samba3_info(s3call);
  86
  87         case WINBINDD_DOMAIN_NAME:
  88                 return wbsrv_samba3_domain_name(s3call);
  89
  90         case WINBINDD_NETBIOS_NAME:
  91                 return wbsrv_samba3_netbios_name(s3call);
  92
  93         case WINBINDD_PRIV_PIPE_DIR:
  94                 return wbsrv_samba3_priv_pipe_dir(s3call);
  95
  96         case WINBINDD_LOOKUPNAME:
  97                 return wbsrv_samba3_lookupname(s3call);
  98
  99         case WINBINDD_LOOKUPSID:
 100                 return wbsrv_samba3_lookupsid(s3call);
 101
 102         case WINBINDD_PAM_AUTH:
 103                 return wbsrv_samba3_pam_auth(s3call);
 104
 105         case WINBINDD_PAM_AUTH_CRAP:
 106                 return wbsrv_samba3_pam_auth_crap(s3call);
 107
 108         case WINBINDD_GETDCNAME:
 109                 return wbsrv_samba3_getdcname(s3call);
 110
 111         case WINBINDD_GETUSERDOMGROUPS:
 112                 return wbsrv_samba3_userdomgroups(s3call);
 113
 114         case WINBINDD_GETUSERSIDS:
 115                 return wbsrv_samba3_usersids(s3call);
 116
 117         case WINBINDD_LIST_GROUPS:
 118                 return wbsrv_samba3_list_groups(s3call);
 119
 120         case WINBINDD_LIST_TRUSTDOM:
 121                 return wbsrv_samba3_list_trustdom(s3call);
 122
 123         case WINBINDD_LIST_USERS:
 124                 return wbsrv_samba3_list_users(s3call);
 125
 126         case WINBINDD_GETPWNAM:
 127                 return wbsrv_samba3_getpwnam(s3call);
 128
 129         case WINBINDD_GETPWUID:
 130                 return wbsrv_samba3_getpwuid(s3call);
 131
 132         case WINBINDD_SETPWENT:
 133                 return wbsrv_samba3_setpwent(s3call);
 134
 135         case WINBINDD_GETPWENT:
 136                 return wbsrv_samba3_getpwent(s3call);
 137
 138         case WINBINDD_ENDPWENT:
 139                 return wbsrv_samba3_endpwent(s3call);
 140
 141         case WINBINDD_GETGRNAM:
 142                 return wbsrv_samba3_getgrnam(s3call);
 143
 144         case WINBINDD_GETGRGID:
 145                 return wbsrv_samba3_getgrgid(s3call);
 146
 147         case WINBINDD_GETGROUPS:
 148                 return wbsrv_samba3_getgroups(s3call);
 149
 150         case WINBINDD_SETGRENT:
 151                 return wbsrv_samba3_setgrent(s3call);
 152
 153         case WINBINDD_GETGRENT:
 154                 return wbsrv_samba3_getgrent(s3call);
 155
 156         case WINBINDD_ENDGRENT:
 157                 return wbsrv_samba3_endgrent(s3call);
 158
 159         case WINBINDD_SID_TO_UID:
 160         case WINBINDD_DUAL_SID2UID:
 161                 return wbsrv_samba3_sid2uid(s3call);
 162
 163         case WINBINDD_SID_TO_GID:
 164         case WINBINDD_DUAL_SID2GID:
 165                 return wbsrv_samba3_sid2gid(s3call);
 166
 167         case WINBINDD_UID_TO_SID:
 168         case WINBINDD_DUAL_UID2SID:
 169                 return wbsrv_samba3_uid2sid(s3call);
 170
 171         case WINBINDD_GID_TO_SID:
 172         case WINBINDD_DUAL_GID2SID:
 173                 return wbsrv_samba3_gid2sid(s3call);
 174
 175         case WINBINDD_DOMAIN_INFO:
 176                 return wbsrv_samba3_domain_info(s3call);
 177
 178         case WINBINDD_PAM_LOGOFF:
 179                 return wbsrv_samba3_pam_logoff(s3call);
 180
 181         /* Unimplemented commands */
 182         case WINBINDD_GETPWSID:
 183         case WINBINDD_PAM_CHAUTHTOK:
 184         case WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP:
 185         case WINBINDD_LOOKUPRIDS:
 186         case WINBINDD_SIDS_TO_XIDS:
 187         case WINBINDD_ALLOCATE_UID:
 188         case WINBINDD_ALLOCATE_GID:
 189         case WINBINDD_REMOVE_MAPPING:
 190         case WINBINDD_SHOW_SEQUENCE:
 191         case WINBINDD_WINS_BYIP:
 192         case WINBINDD_WINS_BYNAME:
 193         case WINBINDD_GETGRLST:
 194         case WINBINDD_GETSIDALIASES:
 195         case WINBINDD_DSGETDCNAME:
 196         case WINBINDD_INIT_CONNECTION:
 197         case WINBINDD_DUAL_SIDS2XIDS:
 198         case WINBINDD_DUAL_REMOVE_MAPPING:
 199         case WINBINDD_DUAL_USERINFO:
 200         case WINBINDD_DUAL_GETSIDALIASES:
 201         case WINBINDD_DUAL_NDRCMD:
 202         case WINBINDD_CCACHE_NTLMAUTH:
 203         case WINBINDD_NUM_CMDS:
 204                 DEBUG(10, ("Unimplemented winbind samba3 request %d\n",
 205                            s3call->request->cmd));
 206                 break;
 207         }
 208
 209         s3call->response->result = WINBINDD_ERROR;
 210         return NT_STATUS_OK;
 211 }
 212
 213 static NTSTATUS wbsrv_samba3_push_reply(struct wbsrv_samba3_call *call)
 214 {
 215         uint8_t *extra_data;
 216         size_t extra_data_len = 0;
 217
 218         extra_data = (uint8_t *)call->response->extra_data.data;
 219         if (extra_data != NULL) {
 220                 extra_data_len = call->response->length -
 221                         sizeof(*call->response);
 222         }
 223
 224         call->out = data_blob_talloc(call, NULL, call->response->length);
 225         NT_STATUS_HAVE_NO_MEMORY(call->out.data);
 226
 227         /* don't push real pointer values into sockets */
 228         if (extra_data) {
 229                 call->response->extra_data.data = (void *)0xFFFFFFFF;
 230         }
 231
 232         memcpy(call->out.data, call->response, sizeof(*call->response));
 233         /* set back the pointer */
 234         call->response->extra_data.data = extra_data;
 235
 236         if (extra_data) {
 237                 memcpy(call->out.data + sizeof(*call->response),
 238                        extra_data,
 239                        extra_data_len);
 240         }
 241
 242         return NT_STATUS_OK;
 243 }
 244
 245 static void wbsrv_samba3_send_reply_done(struct tevent_req *subreq);
 246
 247 /*
 248  * queue a wbsrv_call reply on a wbsrv_connection
 249  * NOTE: that this implies talloc_free(call),
 250  *       use talloc_reference(call) if you need it after
 251  *       calling wbsrv_queue_reply
 252  */
 253 NTSTATUS wbsrv_samba3_send_reply(struct wbsrv_samba3_call *call)
 254 {
 255         struct wbsrv_connection *wbsrv_conn = call->wbconn;
 256         struct tevent_req *subreq;
 257         NTSTATUS status;
 258
 259         status = wbsrv_samba3_push_reply(call);
 260         NT_STATUS_NOT_OK_RETURN(status);
 261
 262         call->out_iov[0].iov_base = (char *) call->out.data;
 263         call->out_iov[0].iov_len = call->out.length;
 264
 265         subreq = tstream_writev_queue_send(call,
 266                                            wbsrv_conn->conn->event.ctx,
 267                                            wbsrv_conn->tstream,
 268                                            wbsrv_conn->send_queue,
 269                                            call->out_iov, 1);
 270         if (subreq == NULL) {
 271                 wbsrv_terminate_connection(wbsrv_conn, "wbsrv_call_loop: "
 272                                 "no memory for tstream_writev_queue_send");
 273                 return NT_STATUS_NO_MEMORY;
 274         }
 275         tevent_req_set_callback(subreq, wbsrv_samba3_send_reply_done, call);
 276
 277         return status;
 278 }
 279
 280 static void wbsrv_samba3_send_reply_done(struct tevent_req *subreq)
 281 {
 282         struct wbsrv_samba3_call *call = tevent_req_callback_data(subreq,
 283                         struct wbsrv_samba3_call);
 284         int sys_errno;
 285         int rc;
 286
 287         rc = tstream_writev_queue_recv(subreq, &sys_errno);
 288         TALLOC_FREE(subreq);
 289         if (rc == -1) {
 290                 const char *reason;
 291
 292                 reason = talloc_asprintf(call, "wbsrv_samba3_send_reply_done: "
 293                                          "tstream_writev_queue_recv() - %d:%s",
 294                                          sys_errno, strerror(sys_errno));
 295                 if (reason == NULL) {
 296                         reason = "wbsrv_samba3_send_reply_done: "
 297                                  "tstream_writev_queue_recv() failed";
 298                 }
 299
 300                 wbsrv_terminate_connection(call->wbconn, reason);
 301                 return;
 302         }
 303
 304         talloc_free(call);
 305 }
 306
 307 NTSTATUS wbsrv_samba3_process(struct wbsrv_samba3_call *call)
 308 {
 309         NTSTATUS status;
 310
 311         status = wbsrv_samba3_pull_request(call);
 312
 313         if (!NT_STATUS_IS_OK(status)) {
 314                 return status;
 315         }
 316
 317         status = wbsrv_samba3_handle_call(call);
 318
 319         if (!NT_STATUS_IS_OK(status)) {
 320                 talloc_free(call);
 321                 return status;
 322         }
 323
 324         if (call->flags & WBSRV_CALL_FLAGS_REPLY_ASYNC) {
 325                 return NT_STATUS_OK;
 326         }
 327
 328         status = wbsrv_samba3_send_reply(call);
 329         return status;
 330 }
 331