6d002902d3046f30cec951db49b31858af1fa259
[jelmer/samba4-debian.git] / 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 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 "lib/socket/socket.h"
24 #include "lib/util/dlinklist.h"
25 #include "lib/events/events.h"
26 #include "smbd/service_task.h"
27 #include "smbd/process_model.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 #include "smbd/service.h"
33 #include "param/secrets.h"
34 #include "param/param.h"
35
36 void wbsrv_terminate_connection(struct wbsrv_connection *wbconn, const char *reason)
37 {
38         stream_terminate_connection(wbconn->conn, reason);
39 }
40
41 /*
42   called on a tcp recv error
43 */
44 static void wbsrv_recv_error(void *private, NTSTATUS status)
45 {
46         struct wbsrv_connection *wbconn = talloc_get_type(private, struct wbsrv_connection);
47         wbsrv_terminate_connection(wbconn, nt_errstr(status));
48 }
49
50 static void wbsrv_accept(struct stream_connection *conn)
51 {
52         struct wbsrv_listen_socket *listen_socket = talloc_get_type(conn->private, 
53                                                                     struct wbsrv_listen_socket);
54         struct wbsrv_connection *wbconn;
55
56         wbconn = talloc_zero(conn, struct wbsrv_connection);
57         if (!wbconn) {
58                 stream_terminate_connection(conn, "wbsrv_accept: out of memory");
59                 return;
60         }
61         wbconn->conn          = conn;
62         wbconn->listen_socket = listen_socket;
63         conn->private         = wbconn;
64
65         wbconn->packet = packet_init(wbconn);
66         if (wbconn->packet == NULL) {
67                 wbsrv_terminate_connection(wbconn, "wbsrv_accept: out of memory");
68                 return;
69         }
70         packet_set_private(wbconn->packet, wbconn);
71         packet_set_socket(wbconn->packet, conn->socket);
72         packet_set_callback(wbconn->packet, wbsrv_samba3_process);
73         packet_set_full_request(wbconn->packet, wbsrv_samba3_packet_full_request);
74         packet_set_error_handler(wbconn->packet, wbsrv_recv_error);
75         packet_set_event_context(wbconn->packet, conn->event.ctx);
76         packet_set_fde(wbconn->packet, conn->event.fde);
77         packet_set_serialise(wbconn->packet);
78 }
79
80 /*
81   receive some data on a winbind connection
82 */
83 static void wbsrv_recv(struct stream_connection *conn, uint16_t flags)
84 {
85         struct wbsrv_connection *wbconn = talloc_get_type(conn->private, 
86                                                           struct wbsrv_connection);
87         packet_recv(wbconn->packet);
88
89 }
90
91 /*
92   called when we can write to a connection
93 */
94 static void wbsrv_send(struct stream_connection *conn, uint16_t flags)
95 {
96         struct wbsrv_connection *wbconn = talloc_get_type(conn->private, 
97                                                           struct wbsrv_connection);
98         packet_queue_run(wbconn->packet);
99 }
100
101 static const struct stream_server_ops wbsrv_ops = {
102         .name                   = "winbind samba3 protocol",
103         .accept_connection      = wbsrv_accept,
104         .recv_handler           = wbsrv_recv,
105         .send_handler           = wbsrv_send
106 };
107
108 /*
109   startup the winbind task
110 */
111 static void winbind_task_init(struct task_server *task)
112 {
113         uint16_t port = 1;
114         const struct model_ops *model_ops;
115         NTSTATUS status;
116         struct wbsrv_service *service;
117         struct wbsrv_listen_socket *listen_socket;
118
119         task_server_set_title(task, "task[winbind]");
120
121         /* within the winbind task we want to be a single process, so
122            ask for the single process model ops and pass these to the
123            stream_setup_socket() call. */
124         model_ops = process_model_byname("single");
125         if (!model_ops) {
126                 task_server_terminate(task,
127                                       "Can't find 'single' process model_ops");
128                 return;
129         }
130
131         /* Make sure the directory for the Samba3 socket exists, and is of the correct permissions */
132         if (!directory_create_or_exist(lp_winbindd_socket_directory(global_loadparm), geteuid(), 0755)) {
133                 task_server_terminate(task,
134                                       "Cannot create winbindd pipe directory");
135                 return;
136         }
137
138         service = talloc_zero(task, struct wbsrv_service);
139         if (!service) goto nomem;
140         service->task   = task;
141
142         service->primary_sid = secrets_get_domain_sid(service,
143                                                       lp_workgroup(global_loadparm));
144         if (service->primary_sid == NULL) {
145                 task_server_terminate(
146                         task, nt_errstr(NT_STATUS_CANT_ACCESS_DOMAIN_INFO));
147                 return;
148         }
149
150         /* setup the unprivileged samba3 socket */
151         listen_socket = talloc(service, struct wbsrv_listen_socket);
152         if (!listen_socket) goto nomem;
153         listen_socket->socket_path      = talloc_asprintf(listen_socket, "%s/%s", 
154                                                           lp_winbindd_socket_directory(global_loadparm), 
155                                                           WINBINDD_SAMBA3_SOCKET);
156         if (!listen_socket->socket_path) goto nomem;
157         listen_socket->service          = service;
158         listen_socket->privileged       = false;
159         status = stream_setup_socket(task->event_ctx, model_ops,
160                                      &wbsrv_ops, "unix",
161                                      listen_socket->socket_path, &port,
162                                      listen_socket);
163         if (!NT_STATUS_IS_OK(status)) goto listen_failed;
164
165         /* setup the privileged samba3 socket */
166         listen_socket = talloc(service, struct wbsrv_listen_socket);
167         if (!listen_socket) goto nomem;
168         listen_socket->socket_path      =
169                 smbd_tmp_path(listen_socket, global_loadparm, 
170                               WINBINDD_SAMBA3_PRIVILEGED_SOCKET);
171         if (!listen_socket->socket_path) goto nomem;
172         listen_socket->service          = service;
173         listen_socket->privileged       = true;
174         status = stream_setup_socket(task->event_ctx, model_ops,
175                                      &wbsrv_ops, "unix",
176                                      listen_socket->socket_path, &port,
177                                      listen_socket);
178         if (!NT_STATUS_IS_OK(status)) goto listen_failed;
179
180         status = wbsrv_init_irpc(service);
181         if (!NT_STATUS_IS_OK(status)) goto irpc_failed;
182
183         return;
184
185 listen_failed:
186         DEBUG(0,("stream_setup_socket(path=%s) failed - %s\n",
187                  listen_socket->socket_path, nt_errstr(status)));
188         task_server_terminate(task, nt_errstr(status));
189         return;
190 irpc_failed:
191         DEBUG(0,("wbsrv_init_irpc() failed - %s\n",
192                  nt_errstr(status)));
193         task_server_terminate(task, nt_errstr(status));
194         return;
195 nomem:
196         task_server_terminate(task, nt_errstr(NT_STATUS_NO_MEMORY));
197         return;
198 }
199
200 /*
201   initialise the winbind server
202  */
203 static NTSTATUS winbind_init(struct event_context *event_ctx,
204                              const struct model_ops *model_ops)
205 {
206         return task_server_startup(event_ctx, model_ops, winbind_task_init);
207 }
208
209 /*
210   register ourselves as a available server
211 */
212 NTSTATUS server_service_winbind_init(void)
213 {
214         return register_server_service("winbind", winbind_init);
215 }