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 "dlinklist.h"
29 #include "smb_server/smb_server.h"
30 #include "system/filesys.h"
33 called when the process model is selected
35 static void standard_model_init(struct event_context *ev)
37 signal(SIGCHLD, SIG_IGN);
41 called when a listening socket becomes readable.
43 static void standard_accept_connection(struct event_context *ev,
44 struct socket_context *sock,
45 void (*new_conn)(struct event_context *, struct socket_context *,
50 struct socket_context *sock2;
52 struct event_context *ev2;
54 /* accept an incoming connection. */
55 status = socket_accept(sock, &sock2);
56 if (!NT_STATUS_IS_OK(status)) {
57 DEBUG(0,("standard_accept_connection: accept: %s\n",
65 /* parent or error code ... */
67 /* go back to the event loop */
71 /* This is now the child code. We need a completely new event_context to work with */
72 ev2 = event_context_init(NULL);
74 /* the service has given us a private pointer that
75 encapsulates the context it needs for this new connection -
76 everything else will be freed */
77 talloc_steal(ev2, private);
78 talloc_steal(private, sock2);
80 /* this will free all the listening sockets and all state that
81 is not associated with this new connection */
85 /* we don't care if the dup fails, as its only a select()
89 /* tdb needs special fork handling */
90 if (tdb_reopen_all() == -1) {
91 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
94 /* Ensure that the forked children do not expose identical random streams */
95 set_need_random_reseed();
97 /* setup this new connection */
98 new_conn(ev2, sock2, getpid(), private);
100 /* we can't return to the top level here, as that event context is gone,
101 so we now process events in the new event context until there are no
103 event_loop_wait(ev2);
110 called to create a new server task
112 static void standard_new_task(struct event_context *ev,
113 void (*new_task)(struct event_context *, uint32_t , void *),
117 struct event_context *ev2;
122 /* parent or error code ... go back to the event loop */
126 /* This is now the child code. We need a completely new event_context to work with */
127 ev2 = event_context_init(NULL);
129 /* the service has given us a private pointer that
130 encapsulates the context it needs for this new connection -
131 everything else will be freed */
132 talloc_steal(ev2, private);
134 /* this will free all the listening sockets and all state that
135 is not associated with this new connection */
138 /* tdb needs special fork handling */
139 if (tdb_reopen_all() == -1) {
140 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
143 /* Ensure that the forked children do not expose identical random streams */
144 set_need_random_reseed();
146 /* setup this new connection */
147 new_task(ev2, getpid(), private);
149 /* we can't return to the top level here, as that event context is gone,
150 so we now process events in the new event context until there are no
152 event_loop_wait(ev2);
159 /* called when a task goes down */
160 static void standard_terminate(struct event_context *ev, const char *reason)
162 DEBUG(2,("standard_terminate: reason[%s]\n",reason));
164 /* this init_iconv() has the effect of freeing the iconv context memory,
165 which makes leak checking easier */
168 /* the secrets db should really hang off the connection structure */
173 /* terminate this process */
178 static const struct model_ops standard_ops = {
180 .model_init = standard_model_init,
181 .accept_connection = standard_accept_connection,
182 .new_task = standard_new_task,
183 .terminate = standard_terminate,
187 initialise the standard process model, registering ourselves with the process model subsystem
189 NTSTATUS process_model_standard_init(void)
191 return register_process_model(&standard_ops);