2 Unix SMB/CIFS implementation.
4 process model: standard (1 process per client connection)
6 Copyright (C) Andrew Tridgell 1992-2005
7 Copyright (C) James J Myers 2003 <myersjj@samba.org>
8 Copyright (C) Stefan (metze) Metzmacher 2004
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "lib/events/events.h"
27 #include "lib/tdb/include/tdb.h"
28 #include "lib/socket/socket.h"
29 #include "smbd/process_model.h"
31 /* For specifiying event context to GSSAPI below */
32 #include "system/kerberos.h"
33 #include "heimdal/lib/gssapi/gssapi_locl.h"
35 #include "passdb/secrets.h"
37 #ifdef HAVE_SETPROCTITLE
38 #ifdef HAVE_SETPROCTITLE_H
39 #include <setproctitle.h>
42 #define setproctitle none_setproctitle
43 static int none_setproctitle(const char *fmt, ...) PRINTF_ATTRIBUTE(1, 2);
44 static int none_setproctitle(const char *fmt, ...)
51 called when the process model is selected
53 static void standard_model_init(struct event_context *ev)
55 signal(SIGCHLD, SIG_IGN);
59 called when a listening socket becomes readable.
61 static void standard_accept_connection(struct event_context *ev,
62 struct socket_context *sock,
63 void (*new_conn)(struct event_context *, struct socket_context *,
68 struct socket_context *sock2;
70 struct event_context *ev2;
71 struct socket_address *c, *s;
73 /* accept an incoming connection. */
74 status = socket_accept(sock, &sock2);
75 if (!NT_STATUS_IS_OK(status)) {
76 DEBUG(0,("standard_accept_connection: accept: %s\n",
78 /* this looks strange, but is correct. We need to throttle things until
79 the system clears enough resources to handle this new socket */
87 /* parent or error code ... */
89 /* go back to the event loop */
95 /* This is now the child code. We need a completely new event_context to work with */
96 ev2 = event_context_init(NULL);
98 /* the service has given us a private pointer that
99 encapsulates the context it needs for this new connection -
100 everything else will be freed */
101 talloc_steal(ev2, private);
102 talloc_steal(private, sock2);
104 /* this will free all the listening sockets and all state that
105 is not associated with this new connection */
109 /* we don't care if the dup fails, as its only a select()
110 speed optimisation */
113 /* tdb needs special fork handling */
114 if (tdb_reopen_all(1) == -1) {
115 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
118 /* Hack to ensure that GSSAPI uses the right event context */
119 gssapi_krb5_init_ev(ev2);
121 /* Ensure that the forked children do not expose identical random streams */
122 set_need_random_reseed();
124 /* setup the process title */
125 c = socket_get_peer_addr(sock2, ev2);
126 s = socket_get_my_addr(sock2, ev2);
128 setproctitle("conn c[%s:%u] s[%s:%u] server_id[%d]",
129 c->addr, c->port, s->addr, s->port, pid);
134 /* setup this new connection */
135 new_conn(ev2, sock2, pid, private);
137 /* we can't return to the top level here, as that event context is gone,
138 so we now process events in the new event context until there are no
140 event_loop_wait(ev2);
147 called to create a new server task
149 static void standard_new_task(struct event_context *ev,
150 void (*new_task)(struct event_context *, uint32_t , void *),
154 struct event_context *ev2;
159 /* parent or error code ... go back to the event loop */
165 /* This is now the child code. We need a completely new event_context to work with */
166 ev2 = event_context_init(NULL);
168 /* the service has given us a private pointer that
169 encapsulates the context it needs for this new connection -
170 everything else will be freed */
171 talloc_steal(ev2, private);
173 /* this will free all the listening sockets and all state that
174 is not associated with this new connection */
177 /* tdb needs special fork handling */
178 if (tdb_reopen_all(1) == -1) {
179 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
182 /* Ensure that the forked children do not expose identical random streams */
183 set_need_random_reseed();
185 setproctitle("task server_id[%d]", pid);
187 /* setup this new connection */
188 new_task(ev2, pid, private);
190 /* we can't return to the top level here, as that event context is gone,
191 so we now process events in the new event context until there are no
193 event_loop_wait(ev2);
200 /* called when a task goes down */
201 static void standard_terminate(struct event_context *ev, const char *reason)
203 DEBUG(2,("standard_terminate: reason[%s]\n",reason));
205 /* this init_iconv() has the effect of freeing the iconv context memory,
206 which makes leak checking easier */
209 /* the secrets db should really hang off the connection structure */
214 /* terminate this process */
218 /* called to set a title of a task or connection */
219 static void standard_set_title(struct event_context *ev, const char *title)
222 setproctitle("%s", title);
228 static const struct model_ops standard_ops = {
230 .model_init = standard_model_init,
231 .accept_connection = standard_accept_connection,
232 .new_task = standard_new_task,
233 .terminate = standard_terminate,
234 .set_title = standard_set_title,
238 initialise the standard process model, registering ourselves with the process model subsystem
240 NTSTATUS process_model_standard_init(void)
242 return register_process_model(&standard_ops);