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"
35 #include "param/param.h"
37 static NTSTATUS smbsrv_recv_generic_request(void *private, DATA_BLOB blob)
40 struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection);
41 uint32_t protocol_version;
43 /* see if its a special NBT packet */
44 if (CVAL(blob.data,0) != 0) {
45 status = smbsrv_init_smb_connection(smb_conn, smb_conn->lp_ctx);
46 NT_STATUS_NOT_OK_RETURN(status);
47 packet_set_callback(smb_conn->packet, smbsrv_recv_smb_request);
48 return smbsrv_recv_smb_request(smb_conn, blob);
51 if (blob.length < (NBT_HDR_SIZE + MIN_SMB_SIZE)) {
52 DEBUG(2,("Invalid SMB packet length count %ld\n", (long)blob.length));
53 smbsrv_terminate_connection(smb_conn, "Invalid SMB packet");
57 protocol_version = IVAL(blob.data, NBT_HDR_SIZE);
59 switch (protocol_version) {
61 status = smbsrv_init_smb_connection(smb_conn, smb_conn->lp_ctx);
62 NT_STATUS_NOT_OK_RETURN(status);
63 packet_set_callback(smb_conn->packet, smbsrv_recv_smb_request);
64 return smbsrv_recv_smb_request(smb_conn, blob);
66 if (lp_srv_maxprotocol(smb_conn->lp_ctx) < PROTOCOL_SMB2) break;
67 status = smbsrv_init_smb2_connection(smb_conn);
68 NT_STATUS_NOT_OK_RETURN(status);
69 packet_set_callback(smb_conn->packet, smbsrv_recv_smb2_request);
70 return smbsrv_recv_smb2_request(smb_conn, blob);
73 DEBUG(2,("Invalid SMB packet: protocol prefix: 0x%08X\n", protocol_version));
74 smbsrv_terminate_connection(smb_conn, "NON-SMB packet");
79 close the socket and shutdown a server_context
81 void smbsrv_terminate_connection(struct smbsrv_connection *smb_conn, const char *reason)
83 stream_terminate_connection(smb_conn->connection, reason);
87 called when a SMB socket becomes readable
89 static void smbsrv_recv(struct stream_connection *conn, uint16_t flags)
91 struct smbsrv_connection *smb_conn = talloc_get_type(conn->private,
92 struct smbsrv_connection);
94 DEBUG(10,("smbsrv_recv\n"));
96 packet_recv(smb_conn->packet);
100 called when a SMB socket becomes writable
102 static void smbsrv_send(struct stream_connection *conn, uint16_t flags)
104 struct smbsrv_connection *smb_conn = talloc_get_type(conn->private,
105 struct smbsrv_connection);
106 packet_queue_run(smb_conn->packet);
110 handle socket recv errors
112 static void smbsrv_recv_error(void *private, NTSTATUS status)
114 struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection);
116 smbsrv_terminate_connection(smb_conn, nt_errstr(status));
120 initialise a server_context from a open socket and register a event handler
121 for reading from that socket
123 static void smbsrv_accept(struct stream_connection *conn)
125 struct smbsrv_connection *smb_conn;
127 DEBUG(5,("smbsrv_accept\n"));
129 smb_conn = talloc_zero(conn, struct smbsrv_connection);
131 stream_terminate_connection(conn, "out of memory");
135 smb_conn->packet = packet_init(smb_conn);
136 if (!smb_conn->packet) {
137 smbsrv_terminate_connection(smb_conn, "out of memory");
140 packet_set_private(smb_conn->packet, smb_conn);
141 packet_set_socket(smb_conn->packet, conn->socket);
142 packet_set_callback(smb_conn->packet, smbsrv_recv_generic_request);
143 packet_set_full_request(smb_conn->packet, packet_full_request_nbt);
144 packet_set_error_handler(smb_conn->packet, smbsrv_recv_error);
145 packet_set_event_context(smb_conn->packet, conn->event.ctx);
146 packet_set_fde(smb_conn->packet, conn->event.fde);
147 packet_set_serialise(smb_conn->packet);
149 smb_conn->lp_ctx = conn->lp_ctx;
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);
159 if (!NT_STATUS_IS_OK(share_get_context_by_name(smb_conn, lp_share_backend(smb_conn->lp_ctx),
160 smb_conn->lp_ctx, &(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 _PUBLIC_ NTSTATUS smbsrv_add_socket(struct event_context *event_context,
177 struct loadparm_context *lp_ctx,
178 const struct model_ops *model_ops,
181 const char **ports = lp_smb_ports(lp_ctx);
185 for (i=0;ports[i];i++) {
186 uint16_t port = atoi(ports[i]);
187 if (port == 0) continue;
188 status = stream_setup_socket(event_context, lp_ctx,
189 model_ops, &smb_stream_ops,
190 "ipv4", address, &port,
191 lp_socket_options(lp_ctx),
193 NT_STATUS_NOT_OK_RETURN(status);
201 pre-open some of our ldb databases, to prevent an explosion of memory usage
204 static void smbsrv_preopen_ldb(struct task_server *task)
206 /* yes, this looks strange. It is a hack to preload the
207 schema. I'd like to share most of the ldb context with the
208 child too. That will come later */
209 talloc_free(samdb_connect(task, task->lp_ctx, NULL));
213 open the smb server sockets
215 static void smbsrv_task_init(struct task_server *task)
219 task_server_set_title(task, "task[smbsrv]");
221 if (lp_interfaces(task->lp_ctx) && lp_bind_interfaces_only(task->lp_ctx)) {
224 struct interface *ifaces;
226 load_interfaces(task, lp_interfaces(task->lp_ctx), &ifaces);
228 num_interfaces = iface_count(ifaces);
230 /* We have been given an interfaces line, and been
231 told to only bind to those interfaces. Create a
232 socket per interface and bind to only these.
234 for(i = 0; i < num_interfaces; i++) {
235 const char *address = iface_n_ip(ifaces, i);
236 status = smbsrv_add_socket(task->event_ctx, task->lp_ctx, task->model_ops, address);
237 if (!NT_STATUS_IS_OK(status)) goto failed;
240 /* Just bind to lp_socket_address() (usually 0.0.0.0) */
241 status = smbsrv_add_socket(task->event_ctx, task->lp_ctx, task->model_ops,
242 lp_socket_address(task->lp_ctx));
243 if (!NT_STATUS_IS_OK(status)) goto failed;
246 smbsrv_preopen_ldb(task);
250 task_server_terminate(task, "Failed to startup smb server task");
253 /* called at smbd startup - register ourselves as a server service */
254 NTSTATUS server_service_smb_init(void)
257 return register_server_service("smb", smbsrv_task_init);