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 specifiying event context to GSSAPI below */
31 #include "system/kerberos.h"
32 #include "heimdal/lib/gssapi/gssapi_locl.h"
34 #include "passdb/secrets.h"
37 called when the process model is selected
39 static void standard_model_init(struct event_context *ev)
41 signal(SIGCHLD, SIG_IGN);
45 called when a listening socket becomes readable.
47 static void standard_accept_connection(struct event_context *ev,
48 struct socket_context *sock,
49 void (*new_conn)(struct event_context *, struct socket_context *,
54 struct socket_context *sock2;
56 struct event_context *ev2;
58 /* accept an incoming connection. */
59 status = socket_accept(sock, &sock2);
60 if (!NT_STATUS_IS_OK(status)) {
61 DEBUG(0,("standard_accept_connection: accept: %s\n",
63 /* this looks strange, but is correct. We need to throttle things until
64 the system clears enough resources to handle this new socket */
72 /* parent or error code ... */
74 /* go back to the event loop */
78 /* This is now the child code. We need a completely new event_context to work with */
79 ev2 = event_context_init(NULL);
81 /* the service has given us a private pointer that
82 encapsulates the context it needs for this new connection -
83 everything else will be freed */
84 talloc_steal(ev2, private);
85 talloc_steal(private, sock2);
87 /* this will free all the listening sockets and all state that
88 is not associated with this new connection */
92 /* we don't care if the dup fails, as its only a select()
96 /* tdb needs special fork handling */
97 if (tdb_reopen_all() == -1) {
98 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
101 /* Hack to ensure that GSSAPI uses the right event context */
102 gssapi_krb5_init_ev(ev2);
104 /* Ensure that the forked children do not expose identical random streams */
105 set_need_random_reseed();
107 /* setup this new connection */
108 new_conn(ev2, sock2, getpid(), private);
110 /* we can't return to the top level here, as that event context is gone,
111 so we now process events in the new event context until there are no
113 event_loop_wait(ev2);
120 called to create a new server task
122 static void standard_new_task(struct event_context *ev,
123 void (*new_task)(struct event_context *, uint32_t , void *),
127 struct event_context *ev2;
132 /* parent or error code ... go back to the event loop */
136 /* This is now the child code. We need a completely new event_context to work with */
137 ev2 = event_context_init(NULL);
139 /* the service has given us a private pointer that
140 encapsulates the context it needs for this new connection -
141 everything else will be freed */
142 talloc_steal(ev2, private);
144 /* this will free all the listening sockets and all state that
145 is not associated with this new connection */
148 /* tdb needs special fork handling */
149 if (tdb_reopen_all() == -1) {
150 DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
153 /* Ensure that the forked children do not expose identical random streams */
154 set_need_random_reseed();
156 /* setup this new connection */
157 new_task(ev2, getpid(), private);
159 /* we can't return to the top level here, as that event context is gone,
160 so we now process events in the new event context until there are no
162 event_loop_wait(ev2);
169 /* called when a task goes down */
170 static void standard_terminate(struct event_context *ev, const char *reason)
172 DEBUG(2,("standard_terminate: reason[%s]\n",reason));
174 /* this init_iconv() has the effect of freeing the iconv context memory,
175 which makes leak checking easier */
178 /* the secrets db should really hang off the connection structure */
183 /* terminate this process */
188 static const struct model_ops standard_ops = {
190 .model_init = standard_model_init,
191 .accept_connection = standard_accept_connection,
192 .new_task = standard_new_task,
193 .terminate = standard_terminate,
197 initialise the standard process model, registering ourselves with the process model subsystem
199 NTSTATUS process_model_standard_init(void)
201 return register_process_model(&standard_ops);