source/winbind/wb_server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main winbindd server routines
   4
   5    Copyright (C) Stefan Metzmacher      2005
   6    Copyright (C) Andrew Tridgell        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 2 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, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "lib/socket/socket.h"
  25 #include "dlinklist.h"
  26 #include "lib/events/events.h"
  27 #include "smbd/service_task.h"
  28 #include "smbd/process_model.h"
  29 #include "smbd/service_stream.h"
  30 #include "nsswitch/winbind_nss_config.h"
  31 #include "winbind/wb_server.h"
  32 #include "lib/stream/packet.h"
  33
  34 void wbsrv_terminate_connection(struct wbsrv_connection *wbconn, const char *reason)
  35 {
  36         stream_terminate_connection(wbconn->conn, reason);
  37 }
  38
  39 /*
  40   called on a tcp recv error
  41 */
  42 static void wbsrv_recv_error(void *private, NTSTATUS status)
  43 {
  44         struct wbsrv_connection *wbconn = talloc_get_type(private, struct wbsrv_connection);
  45         wbsrv_terminate_connection(wbconn, nt_errstr(status));
  46 }
  47
  48 static void wbsrv_accept(struct stream_connection *conn)
  49 {
  50         struct wbsrv_listen_socket *listen_socket = talloc_get_type(conn->private,
  51                                                                     struct wbsrv_listen_socket);
  52         struct wbsrv_connection *wbconn;
  53
  54         wbconn = talloc_zero(conn, struct wbsrv_connection);
  55         if (!wbconn) {
  56                 stream_terminate_connection(conn, "wbsrv_accept: out of memory");
  57                 return;
  58         }
  59         wbconn->conn          = conn;
  60         wbconn->listen_socket = listen_socket;
  61         conn->private         = wbconn;
  62
  63         wbconn->packet = packet_init(wbconn);
  64         if (wbconn->packet == NULL) {
  65                 wbsrv_terminate_connection(wbconn, "wbsrv_accept: out of memory");
  66                 return;
  67         }
  68         packet_set_private(wbconn->packet, wbconn);
  69         packet_set_socket(wbconn->packet, conn->socket);
  70         packet_set_callback(wbconn->packet, wbsrv_samba3_process);
  71         packet_set_full_request(wbconn->packet, wbsrv_samba3_packet_full_request);
  72         packet_set_error_handler(wbconn->packet, wbsrv_recv_error);
  73         packet_set_event_context(wbconn->packet, conn->event.ctx);
  74         packet_set_fde(wbconn->packet, conn->event.fde);
  75         packet_set_serialise(wbconn->packet);
  76 }
  77
  78 /*
  79   receive some data on a winbind connection
  80 */
  81 static void wbsrv_recv(struct stream_connection *conn, uint16_t flags)
  82 {
  83         struct wbsrv_connection *wbconn = talloc_get_type(conn->private,
  84                                                           struct wbsrv_connection);
  85         packet_recv(wbconn->packet);
  86
  87 }
  88
  89 /*
  90   called when we can write to a connection
  91 */
  92 static void wbsrv_send(struct stream_connection *conn, uint16_t flags)
  93 {
  94         struct wbsrv_connection *wbconn = talloc_get_type(conn->private,
  95                                                           struct wbsrv_connection);
  96         packet_queue_run(wbconn->packet);
  97 }
  98
  99 static const struct stream_server_ops wbsrv_ops = {
 100         .name                   = "winbind samba3 protocol",
 101         .accept_connection      = wbsrv_accept,
 102         .recv_handler           = wbsrv_recv,
 103         .send_handler           = wbsrv_send
 104 };
 105
 106 /*
 107   startup the winbind task
 108 */
 109 static void winbind_task_init(struct task_server *task)
 110 {
 111         uint16_t port = 1;
 112         const struct model_ops *model_ops;
 113         NTSTATUS status;
 114         struct wbsrv_service *service;
 115         struct wbsrv_listen_socket *listen_socket;
 116
 117         /* within the winbind task we want to be a single process, so
 118            ask for the single process model ops and pass these to the
 119            stream_setup_socket() call. */
 120         model_ops = process_model_byname("single");
 121         if (!model_ops) {
 122                 task_server_terminate(task,
 123                                       "Can't find 'single' process model_ops");
 124                 return;
 125         }
 126
 127         /* Make sure the directory for the Samba3 socket exists, and is of the correct permissions */
 128         if (!directory_create_or_exist(lp_winbindd_socket_directory(), geteuid(), 0755)) {
 129                 task_server_terminate(task,
 130                                       "Cannot create winbindd pipe directory");
 131                 return;
 132         }
 133
 134         service = talloc_zero(task, struct wbsrv_service);
 135         if (!service) goto nomem;
 136         service->task   = task;
 137
 138         service->primary_sid = secrets_get_domain_sid(service,
 139                                                       lp_workgroup());
 140         if (service->primary_sid == NULL) {
 141                 task_server_terminate(
 142                         task, nt_errstr(NT_STATUS_CANT_ACCESS_DOMAIN_INFO));
 143                 return;
 144         }
 145
 146         /* setup the unprivileged samba3 socket */
 147         listen_socket = talloc(service, struct wbsrv_listen_socket);
 148         if (!listen_socket) goto nomem;
 149         listen_socket->socket_path      = talloc_asprintf(listen_socket, "%s/%s",
 150                                                           lp_winbindd_socket_directory(),
 151                                                           WINBINDD_SAMBA3_SOCKET);
 152         if (!listen_socket->socket_path) goto nomem;
 153         listen_socket->service          = service;
 154         listen_socket->privileged       = False;
 155         status = stream_setup_socket(task->event_ctx, model_ops,
 156                                      &wbsrv_ops, "unix",
 157                                      listen_socket->socket_path, &port,
 158                                      listen_socket);
 159         if (!NT_STATUS_IS_OK(status)) goto listen_failed;
 160
 161         /* setup the privileged samba3 socket */
 162         listen_socket = talloc(service, struct wbsrv_listen_socket);
 163         if (!listen_socket) goto nomem;
 164         listen_socket->socket_path      =
 165                 smbd_tmp_path(listen_socket,
 166                               WINBINDD_SAMBA3_PRIVILEGED_SOCKET);
 167         if (!listen_socket->socket_path) goto nomem;
 168         listen_socket->service          = service;
 169         listen_socket->privileged       = True;
 170         status = stream_setup_socket(task->event_ctx, model_ops,
 171                                      &wbsrv_ops, "unix",
 172                                      listen_socket->socket_path, &port,
 173                                      listen_socket);
 174         if (!NT_STATUS_IS_OK(status)) goto listen_failed;
 175
 176         return;
 177
 178 listen_failed:
 179         DEBUG(0,("stream_setup_socket(path=%s) failed - %s\n",
 180                  listen_socket->socket_path, nt_errstr(status)));
 181         task_server_terminate(task, nt_errstr(status));
 182         return;
 183 nomem:
 184         task_server_terminate(task, nt_errstr(NT_STATUS_NO_MEMORY));
 185         return;
 186 }
 187
 188 /*
 189   initialise the winbind server
 190  */
 191 static NTSTATUS winbind_init(struct event_context *event_ctx,
 192                              const struct model_ops *model_ops)
 193 {
 194         return task_server_startup(event_ctx, model_ops, winbind_task_init);
 195 }
 196
 197 /*
 198   register ourselves as a available server
 199 */
 200 NTSTATUS server_service_winbind_init(void)
 201 {
 202         return register_server_service("winbind", winbind_init);
 203 }