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DEFINITIONS
This source file includes following definitions.
- samba3_smb_accept
- samba3_add_socket
- samba3_smb_task_init
- server_service_samba3_smb_init
1 /*
2 Unix SMB/CIFS implementation.
3
4 process incoming connections and fork a samba3 in inetd mode
5
6 Copyright (C) Stefan Metzmacher 2008
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "smbd/service_task.h"
24 #include "smbd/service_stream.h"
25 #include "smbd/service.h"
26 #include "lib/messaging/irpc.h"
27 #include "lib/stream/packet.h"
28 #include "lib/socket/socket.h"
29 #include "libcli/smb2/smb2.h"
30 #include "smb_server/smb2/smb2_server.h"
31 #include "system/network.h"
32 #include "lib/socket/netif.h"
33 #include "param/share.h"
34 #include "param/param.h"
35 #include "dynconfig/dynconfig.h"
36 #include "smbd/process_model.h"
37
38 /*
39 initialise a server_context from a open socket and register a event handler
40 for reading from that socket
41 */
42 static void samba3_smb_accept(struct stream_connection *conn)
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43 {
44 int i;
45 int fd = socket_get_fd(conn->socket);
46 const char *prog;
47 char *argv[2];
48 char *reason;
49 extern char **environ;
50
51 close(0);
52 close(1);
53 dup2(fd, 0);
54 dup2(fd, 1);
55 dup2(fd, 2);
56 for (i=3;i<256;i++) {
57 close(i);
58 }
59
60 prog = lp_parm_string(conn->lp_ctx, NULL, "samba3", "smbd");
61
62 if (prog == NULL) {
63 argv[0] = talloc_asprintf(conn, "%s/%s", dyn_BINDIR, "smbd3");
64 }
65 else {
66 argv[0] = talloc_strdup(conn, prog);
67 }
68
69 if (argv[0] == NULL) {
70 stream_terminate_connection(conn, "out of memory");
71 return;
72 }
73 argv[1] = NULL;
74
75 execve(argv[0], argv, environ);
76
77 /*
78 * Should never get here
79 */
80 reason = talloc_asprintf(conn, "Could not execute %s", argv[0]);
81 if (reason == NULL) {
82 stream_terminate_connection(conn, "out of memory");
83 return;
84 }
85 stream_terminate_connection(conn, reason);
86 talloc_free(reason);
87 }
88
89 static const struct stream_server_ops samba3_smb_stream_ops = {
90 .name = "samba3",
91 .accept_connection = samba3_smb_accept,
92 };
93
94 /*
95 setup a listening socket on all the SMB ports for a particular address
96 */
97 static NTSTATUS samba3_add_socket(struct tevent_context *event_context,
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98 struct loadparm_context *lp_ctx,
99 const struct model_ops *model_ops,
100 const char *address)
101 {
102 const char **ports = lp_smb_ports(lp_ctx);
103 int i;
104 NTSTATUS status;
105
106 for (i=0;ports[i];i++) {
107 uint16_t port = atoi(ports[i]);
108 if (port == 0) continue;
109 status = stream_setup_socket(event_context, lp_ctx,
110 model_ops, &samba3_smb_stream_ops,
111 "ip", address, &port,
112 lp_socket_options(lp_ctx),
113 NULL);
114 NT_STATUS_NOT_OK_RETURN(status);
115 }
116
117 return NT_STATUS_OK;
118 }
119
120
121 /*
122 open the smb server sockets
123 */
124 static void samba3_smb_task_init(struct task_server *task)
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125 {
126 NTSTATUS status;
127 const struct model_ops *model_ops;
128
129 model_ops = process_model_startup(task->event_ctx, "standard");
130
131 if (model_ops == NULL) {
132 goto failed;
133 }
134
135 task_server_set_title(task, "task[samba3_smb]");
136
137 if (lp_interfaces(task->lp_ctx)
138 && lp_bind_interfaces_only(task->lp_ctx)) {
139 int num_interfaces;
140 int i;
141 struct interface *ifaces;
142
143 load_interfaces(task, lp_interfaces(task->lp_ctx), &ifaces);
144
145 num_interfaces = iface_count(ifaces);
146
147 /* We have been given an interfaces line, and been
148 told to only bind to those interfaces. Create a
149 socket per interface and bind to only these.
150 */
151 for(i = 0; i < num_interfaces; i++) {
152 const char *address = iface_n_ip(ifaces, i);
153 status = samba3_add_socket(task->event_ctx,
154 task->lp_ctx,
155 model_ops, address);
156 if (!NT_STATUS_IS_OK(status)) goto failed;
157 }
158 } else {
159 /* Just bind to lp_socket_address() (usually 0.0.0.0) */
160 status = samba3_add_socket(task->event_ctx, task->lp_ctx,
161 model_ops,
162 lp_socket_address(task->lp_ctx));
163 if (!NT_STATUS_IS_OK(status)) goto failed;
164 }
165
166 return;
167 failed:
168 task_server_terminate(task, "Failed to startup samba3 smb task");
169 }
170
171 /* called at smbd startup - register ourselves as a server service */
172 NTSTATUS server_service_samba3_smb_init(void)
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173 {
174 return register_server_service("samba3_smb", samba3_smb_task_init);
175 }