1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/*
Unix SMB/CIFS implementation.
process model: standard (1 process per client connection)
Copyright (C) Andrew Tridgell 1992-2003
Copyright (C) James J Myers 2003 <myersjj@samba.org>
Copyright (C) Stefan (metze) Metzmacher 2004
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "events.h"
#include "dlinklist.h"
#include "smb_server/smb_server.h"
#include "process_model.h"
/*
called when the process model is selected
*/
static void standard_model_startup(void)
{
signal(SIGCHLD, SIG_IGN);
smbd_process_init();
}
/*
called when a listening socket becomes readable
*/
static void standard_accept_connection(struct event_context *ev, struct fd_event *srv_fde,
struct timeval t, uint16_t flags)
{
NTSTATUS status;
struct socket_context *sock;
struct server_socket *server_socket = srv_fde->private;
struct server_connection *conn;
pid_t pid;
/* accept an incoming connection. */
status = socket_accept(server_socket->socket, &sock);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("standard_accept_connection: accept: %s\n",
nt_errstr(status)));
return;
}
pid = fork();
if (pid != 0) {
/* parent or error code ... */
socket_destroy(sock);
/* go back to the event loop */
return;
}
/* Child code ... */
/* close all the listening sockets */
service_close_listening_sockets(server_socket->service->srv_ctx);
/* we don't care if the dup fails, as its only a select()
speed optimisation */
socket_dup(sock);
/* tdb needs special fork handling */
if (tdb_reopen_all() == -1) {
DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
}
/* Ensure that the forked children do not expose identical random streams */
set_need_random_reseed();
conn = server_setup_connection(ev, server_socket, sock, t, getpid());
if (!conn) {
DEBUG(0,("server_setup_connection(ev, server_socket, sock, t) failed\n"));
return;
}
talloc_steal(conn, sock);
DLIST_ADD(server_socket->connection_list,conn);
/* return to the event loop */
}
/* called when a SMB connection goes down */
static void standard_terminate_connection(struct server_connection *conn, const char *reason)
{
DEBUG(2,("standard_terminate_connection: reason[%s]\n",reason));
if (conn) {
talloc_free(conn->service->srv_ctx);
}
/* this init_iconv() has the effect of freeing the iconv context memory,
which makes leak checking easier */
init_iconv();
/* the secrets db should really hang off the connection structure */
secrets_shutdown();
/* terminate this process */
exit(0);
}
static int standard_get_id(struct smbsrv_request *req)
{
return (int)req->smb_conn->pid;
}
static void standard_exit_server(struct server_context *srv_ctx, const char *reason)
{
DEBUG(1,("standard_exit_server: reason[%s]\n",reason));
}
/*
initialise the standard process model, registering ourselves with the process model subsystem
*/
NTSTATUS process_model_standard_init(void)
{
NTSTATUS ret;
struct model_ops ops;
ZERO_STRUCT(ops);
/* fill in our name */
ops.name = "standard";
/* fill in all the operations */
ops.model_startup = standard_model_startup;
ops.accept_connection = standard_accept_connection;
ops.terminate_connection = standard_terminate_connection;
ops.exit_server = standard_exit_server;
ops.get_id = standard_get_id;
/* register ourselves with the PROCESS_MODEL subsystem. */
ret = register_process_model(&ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register process_model 'standard'!\n"));
return ret;
}
return ret;
}
|
