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 2 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, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include "smbd/service_task.h"
24 #include "smbd/service_stream.h"
25 #include "smbd/service.h"
26 #include "smb_server/smb_server.h"
27 #include "smb_server/service_smb_proto.h"
28 #include "lib/messaging/irpc.h"
29 #include "lib/stream/packet.h"
30 #include "libcli/smb2/smb2.h"
31 #include "smb_server/smb2/smb2_server.h"
32 #include "system/network.h"
33 #include "netif/netif.h"
35 static NTSTATUS smbsrv_recv_generic_request(void *private, DATA_BLOB blob)
38 struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection);
39 uint32_t protocol_version;
41 /* see if its a special NBT packet */
42 if (CVAL(blob.data,0) != 0) {
43 status = smbsrv_init_smb_connection(smb_conn);
44 NT_STATUS_NOT_OK_RETURN(status);
45 packet_set_callback(smb_conn->packet, smbsrv_recv_smb_request);
46 return smbsrv_recv_smb_request(smb_conn, blob);
49 if (blob.length < (NBT_HDR_SIZE + MIN_SMB_SIZE)) {
50 DEBUG(2,("Invalid SMB packet length count %ld\n", (long)blob.length));
51 smbsrv_terminate_connection(smb_conn, "Invalid SMB packet");
55 protocol_version = IVAL(blob.data, NBT_HDR_SIZE);
57 switch (protocol_version) {
59 status = smbsrv_init_smb_connection(smb_conn);
60 NT_STATUS_NOT_OK_RETURN(status);
61 packet_set_callback(smb_conn->packet, smbsrv_recv_smb_request);
62 return smbsrv_recv_smb_request(smb_conn, blob);
64 if (lp_maxprotocol() < PROTOCOL_SMB2) break;
65 status = smbsrv_init_smb2_connection(smb_conn);
66 NT_STATUS_NOT_OK_RETURN(status);
67 packet_set_callback(smb_conn->packet, smbsrv_recv_smb2_request);
68 return smbsrv_recv_smb2_request(smb_conn, blob);
71 DEBUG(2,("Invalid SMB packet: protocol prefix: 0x%08X\n", protocol_version));
72 smbsrv_terminate_connection(smb_conn, "NON-SMB packet");
77 close the socket and shutdown a server_context
79 void smbsrv_terminate_connection(struct smbsrv_connection *smb_conn, const char *reason)
81 stream_terminate_connection(smb_conn->connection, reason);
85 called when a SMB socket becomes readable
87 static void smbsrv_recv(struct stream_connection *conn, uint16_t flags)
89 struct smbsrv_connection *smb_conn = talloc_get_type(conn->private,
90 struct smbsrv_connection);
92 DEBUG(10,("smbsrv_recv\n"));
94 packet_recv(smb_conn->packet);
96 /* free up temporary memory */
101 called when a SMB socket becomes writable
103 static void smbsrv_send(struct stream_connection *conn, uint16_t flags)
105 struct smbsrv_connection *smb_conn = talloc_get_type(conn->private,
106 struct smbsrv_connection);
107 packet_queue_run(smb_conn->packet);
111 handle socket recv errors
113 static void smbsrv_recv_error(void *private, NTSTATUS status)
115 struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection);
117 smbsrv_terminate_connection(smb_conn, nt_errstr(status));
121 initialise a server_context from a open socket and register a event handler
122 for reading from that socket
124 static void smbsrv_accept(struct stream_connection *conn)
126 struct smbsrv_connection *smb_conn;
128 DEBUG(5,("smbsrv_accept\n"));
130 smb_conn = talloc_zero(conn, struct smbsrv_connection);
132 stream_terminate_connection(conn, "out of memory");
136 smb_conn->packet = packet_init(smb_conn);
137 if (!smb_conn->packet) {
138 smbsrv_terminate_connection(smb_conn, "out of memory");
141 packet_set_private(smb_conn->packet, smb_conn);
142 packet_set_socket(smb_conn->packet, conn->socket);
143 packet_set_callback(smb_conn->packet, smbsrv_recv_generic_request);
144 packet_set_full_request(smb_conn->packet, packet_full_request_nbt);
145 packet_set_error_handler(smb_conn->packet, smbsrv_recv_error);
146 packet_set_event_context(smb_conn->packet, conn->event.ctx);
147 packet_set_fde(smb_conn->packet, conn->event.fde);
148 packet_set_serialise(smb_conn->packet);
150 smb_conn->connection = conn;
151 conn->private = smb_conn;
153 irpc_add_name(conn->msg_ctx, "smb_server");
155 smb_conn->statistics.connect_time = timeval_current();
157 smbsrv_management_init(smb_conn);
160 static const struct stream_server_ops smb_stream_ops = {
162 .accept_connection = smbsrv_accept,
163 .recv_handler = smbsrv_recv,
164 .send_handler = smbsrv_send,
168 setup a listening socket on all the SMB ports for a particular address
170 static NTSTATUS smb_add_socket(struct event_context *event_context,
171 const struct model_ops *model_ops,
174 const char **ports = lp_smb_ports();
178 for (i=0;ports[i];i++) {
179 uint16_t port = atoi(ports[i]);
180 if (port == 0) continue;
181 status = stream_setup_socket(event_context, model_ops, &smb_stream_ops,
182 "ipv4", address, &port, NULL);
183 NT_STATUS_NOT_OK_RETURN(status);
190 open the smb server sockets
192 static void smbsrv_task_init(struct task_server *task)
196 task_server_set_title(task, "task[smbsrv]");
198 if (lp_interfaces() && lp_bind_interfaces_only()) {
199 int num_interfaces = iface_count();
202 /* We have been given an interfaces line, and been
203 told to only bind to those interfaces. Create a
204 socket per interface and bind to only these.
206 for(i = 0; i < num_interfaces; i++) {
207 const char *address = iface_n_ip(i);
208 status = smb_add_socket(task->event_ctx, task->model_ops, address);
209 if (!NT_STATUS_IS_OK(status)) goto failed;
212 /* Just bind to lp_socket_address() (usually 0.0.0.0) */
213 status = smb_add_socket(task->event_ctx, task->model_ops, lp_socket_address());
214 if (!NT_STATUS_IS_OK(status)) goto failed;
219 task_server_terminate(task, "Failed to startup smb server task");
223 called on startup of the smb server service It's job is to start
224 listening on all configured sockets
226 static NTSTATUS smbsrv_init(struct event_context *event_context,
227 const struct model_ops *model_ops)
229 return task_server_startup(event_context, model_ops, smbsrv_task_init);
232 /* called at smbd startup - register ourselves as a server service */
233 NTSTATUS server_service_smb_init(void)
235 return register_server_service("smb", smbsrv_init);