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 "smb_server/smb_server.h"
30 /* For sepecifiying event context to GSSAPI below */
31 #include "system/kerberos.h"
32 #include "heimdal/lib/gssapi/gssapi_locl.h"
35 called when the process model is selected
37 static void standard_model_init(struct event_context *ev)
39 signal(SIGCHLD, SIG_IGN);
43 called when a listening socket becomes readable.
45 static void standard_accept_connection(struct event_context *ev,
46 struct socket_context *sock,
47 void (*new_conn)(struct event_context *, struct socket_context *,
52 struct socket_context *sock2;
54 struct event_context *ev2;
56 /* accept an incoming connection. */
57 status = socket_accept(sock, &sock2);
58 if (!NT_STATUS_IS_OK(status)) {
59 DEBUG(0,("standard_accept_connection: accept: %s\n",
61 /* this looks strange, but is correct. We need to throttle things until
62 the system clears enough resources to handle this new socket */
70 /* parent or error code ... */
72 /* go back to the event loop */
76 /* This is now the child code. We need a completely new event_context to work with */
77 ev2 = event_context_init(NULL);
79 /* the service has given us a private pointer that
80 encapsulates the context it needs for this new connection -
81 everything else will be freed */
82 talloc_steal(ev2, private);
83 talloc_steal(private, sock2);
85 /* this will free all the listening sockets and all state that
86 is not associated with this new connection */
90 /* we don't care if the dup fails, as its only a select()
94 /* tdb needs special fork handling */
95 if (tdb_reopen_all() == -1) {
96 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
99 /* Hack to ensure that GSSAPI uses the right event context */
100 gssapi_krb5_init_ev(ev2);
102 /* Ensure that the forked children do not expose identical random streams */
103 set_need_random_reseed();
105 /* setup this new connection */
106 new_conn(ev2, sock2, getpid(), private);
108 /* we can't return to the top level here, as that event context is gone,
109 so we now process events in the new event context until there are no
111 event_loop_wait(ev2);
118 called to create a new server task
120 static void standard_new_task(struct event_context *ev,
121 void (*new_task)(struct event_context *, uint32_t , void *),
125 struct event_context *ev2;
130 /* parent or error code ... go back to the event loop */
134 /* This is now the child code. We need a completely new event_context to work with */
135 ev2 = event_context_init(NULL);
137 /* the service has given us a private pointer that
138 encapsulates the context it needs for this new connection -
139 everything else will be freed */
140 talloc_steal(ev2, private);
142 /* this will free all the listening sockets and all state that
143 is not associated with this new connection */
146 /* tdb needs special fork handling */
147 if (tdb_reopen_all() == -1) {
148 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
151 /* Ensure that the forked children do not expose identical random streams */
152 set_need_random_reseed();
154 /* setup this new connection */
155 new_task(ev2, getpid(), private);
157 /* we can't return to the top level here, as that event context is gone,
158 so we now process events in the new event context until there are no
160 event_loop_wait(ev2);
167 /* called when a task goes down */
168 static void standard_terminate(struct event_context *ev, const char *reason)
170 DEBUG(2,("standard_terminate: reason[%s]\n",reason));
172 /* this init_iconv() has the effect of freeing the iconv context memory,
173 which makes leak checking easier */
176 /* the secrets db should really hang off the connection structure */
181 /* terminate this process */
186 static const struct model_ops standard_ops = {
188 .model_init = standard_model_init,
189 .accept_connection = standard_accept_connection,
190 .new_task = standard_new_task,
191 .terminate = standard_terminate,
195 initialise the standard process model, registering ourselves with the process model subsystem
197 NTSTATUS process_model_standard_init(void)
199 return register_process_model(&standard_ops);