2 Unix SMB/CIFS implementation.
3 process incoming packets - main loop
4 Copyright (C) Andrew Tridgell 2004-2005
5 Copyright (C) Stefan Metzmacher 2004-2005
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "smbd/service_task.h"
23 #include "smbd/service_stream.h"
24 #include "smbd/service.h"
25 #include "smb_server/smb_server.h"
26 #include "smb_server/service_smb_proto.h"
27 #include "lib/messaging/irpc.h"
28 #include "lib/stream/packet.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 "dsdb/samdb/samdb.h"
36 static NTSTATUS smbsrv_recv_generic_request(void *private, DATA_BLOB blob)
39 struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection);
40 uint32_t protocol_version;
42 /* see if its a special NBT packet */
43 if (CVAL(blob.data,0) != 0) {
44 status = smbsrv_init_smb_connection(smb_conn);
45 NT_STATUS_NOT_OK_RETURN(status);
46 packet_set_callback(smb_conn->packet, smbsrv_recv_smb_request);
47 return smbsrv_recv_smb_request(smb_conn, blob);
50 if (blob.length < (NBT_HDR_SIZE + MIN_SMB_SIZE)) {
51 DEBUG(2,("Invalid SMB packet length count %ld\n", (long)blob.length));
52 smbsrv_terminate_connection(smb_conn, "Invalid SMB packet");
56 protocol_version = IVAL(blob.data, NBT_HDR_SIZE);
58 switch (protocol_version) {
60 status = smbsrv_init_smb_connection(smb_conn);
61 NT_STATUS_NOT_OK_RETURN(status);
62 packet_set_callback(smb_conn->packet, smbsrv_recv_smb_request);
63 return smbsrv_recv_smb_request(smb_conn, blob);
65 if (lp_srv_maxprotocol() < PROTOCOL_SMB2) break;
66 status = smbsrv_init_smb2_connection(smb_conn);
67 NT_STATUS_NOT_OK_RETURN(status);
68 packet_set_callback(smb_conn->packet, smbsrv_recv_smb2_request);
69 return smbsrv_recv_smb2_request(smb_conn, blob);
72 DEBUG(2,("Invalid SMB packet: protocol prefix: 0x%08X\n", protocol_version));
73 smbsrv_terminate_connection(smb_conn, "NON-SMB packet");
78 close the socket and shutdown a server_context
80 void smbsrv_terminate_connection(struct smbsrv_connection *smb_conn, const char *reason)
82 stream_terminate_connection(smb_conn->connection, reason);
86 called when a SMB socket becomes readable
88 static void smbsrv_recv(struct stream_connection *conn, uint16_t flags)
90 struct smbsrv_connection *smb_conn = talloc_get_type(conn->private,
91 struct smbsrv_connection);
93 DEBUG(10,("smbsrv_recv\n"));
95 packet_recv(smb_conn->packet);
97 /* free up temporary memory */
102 called when a SMB socket becomes writable
104 static void smbsrv_send(struct stream_connection *conn, uint16_t flags)
106 struct smbsrv_connection *smb_conn = talloc_get_type(conn->private,
107 struct smbsrv_connection);
108 packet_queue_run(smb_conn->packet);
112 handle socket recv errors
114 static void smbsrv_recv_error(void *private, NTSTATUS status)
116 struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection);
118 smbsrv_terminate_connection(smb_conn, nt_errstr(status));
122 initialise a server_context from a open socket and register a event handler
123 for reading from that socket
125 static void smbsrv_accept(struct stream_connection *conn)
127 struct smbsrv_connection *smb_conn;
129 DEBUG(5,("smbsrv_accept\n"));
131 smb_conn = talloc_zero(conn, struct smbsrv_connection);
133 stream_terminate_connection(conn, "out of memory");
137 smb_conn->packet = packet_init(smb_conn);
138 if (!smb_conn->packet) {
139 smbsrv_terminate_connection(smb_conn, "out of memory");
142 packet_set_private(smb_conn->packet, smb_conn);
143 packet_set_socket(smb_conn->packet, conn->socket);
144 packet_set_callback(smb_conn->packet, smbsrv_recv_generic_request);
145 packet_set_full_request(smb_conn->packet, packet_full_request_nbt);
146 packet_set_error_handler(smb_conn->packet, smbsrv_recv_error);
147 packet_set_event_context(smb_conn->packet, conn->event.ctx);
148 packet_set_fde(smb_conn->packet, conn->event.fde);
149 packet_set_serialise(smb_conn->packet);
151 smb_conn->connection = conn;
152 conn->private = smb_conn;
154 irpc_add_name(conn->msg_ctx, "smb_server");
156 smb_conn->statistics.connect_time = timeval_current();
158 smbsrv_management_init(smb_conn);
160 if (!NT_STATUS_IS_OK(share_get_context(smb_conn, &(smb_conn->share_context)))) {
161 smbsrv_terminate_connection(smb_conn, "share_init failed!");
166 static const struct stream_server_ops smb_stream_ops = {
168 .accept_connection = smbsrv_accept,
169 .recv_handler = smbsrv_recv,
170 .send_handler = smbsrv_send,
174 setup a listening socket on all the SMB ports for a particular address
176 static NTSTATUS smb_add_socket(struct event_context *event_context,
177 const struct model_ops *model_ops,
180 const char **ports = lp_smb_ports();
184 for (i=0;ports[i];i++) {
185 uint16_t port = atoi(ports[i]);
186 if (port == 0) continue;
187 status = stream_setup_socket(event_context, model_ops, &smb_stream_ops,
188 "ipv4", address, &port, NULL);
189 NT_STATUS_NOT_OK_RETURN(status);
197 pre-open some of our ldb databases, to prevent an explosion of memory usage
200 static void smbsrv_preopen_ldb(struct task_server *task)
202 /* yes, this looks strange. It is a hack to preload the
203 schema. I'd like to share most of the ldb context with the
204 child too. That will come later */
205 talloc_free(samdb_connect(task, NULL));
209 open the smb server sockets
211 static void smbsrv_task_init(struct task_server *task)
215 task_server_set_title(task, "task[smbsrv]");
217 if (lp_interfaces() && lp_bind_interfaces_only()) {
218 int num_interfaces = iface_count();
221 /* We have been given an interfaces line, and been
222 told to only bind to those interfaces. Create a
223 socket per interface and bind to only these.
225 for(i = 0; i < num_interfaces; i++) {
226 const char *address = iface_n_ip(i);
227 status = smb_add_socket(task->event_ctx, task->model_ops, address);
228 if (!NT_STATUS_IS_OK(status)) goto failed;
231 /* Just bind to lp_socket_address() (usually 0.0.0.0) */
232 status = smb_add_socket(task->event_ctx, task->model_ops, lp_socket_address());
233 if (!NT_STATUS_IS_OK(status)) goto failed;
236 smbsrv_preopen_ldb(task);
240 task_server_terminate(task, "Failed to startup smb server task");
244 called on startup of the smb server service It's job is to start
245 listening on all configured sockets
247 static NTSTATUS smbsrv_init(struct event_context *event_context,
248 const struct model_ops *model_ops)
250 return task_server_startup(event_context, model_ops, smbsrv_task_init);
253 /* called at smbd startup - register ourselves as a server service */
254 NTSTATUS server_service_smb_init(void)
256 return register_server_service("smb", smbsrv_init);