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