2 Unix SMB/CIFS implementation.
4 WINS Replication server
6 Copyright (C) Stefan Metzmacher 2005
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 2 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "lib/socket/socket.h"
25 #include "lib/stream/packet.h"
26 #include "smbd/service_task.h"
27 #include "smbd/service_stream.h"
28 #include "lib/messaging/irpc.h"
29 #include "librpc/gen_ndr/ndr_winsrepl.h"
30 #include "wrepl_server/wrepl_server.h"
32 void wreplsrv_terminate_in_connection(struct wreplsrv_in_connection *wreplconn, const char *reason)
34 stream_terminate_connection(wreplconn->conn, reason);
37 static int terminate_after_send_destructor(void *ptr)
39 struct wreplsrv_in_connection **tas = talloc_get_type(ptr, struct wreplsrv_in_connection *);
40 wreplsrv_terminate_in_connection(*tas, "wreplsrv_in_connection: terminate_after_send");
45 receive some data on a WREPL connection
47 static NTSTATUS wreplsrv_recv_request(void *private, DATA_BLOB blob)
49 struct wreplsrv_in_connection *wreplconn = talloc_get_type(private, struct wreplsrv_in_connection);
50 struct wreplsrv_in_call *call;
51 DATA_BLOB packet_in_blob;
52 DATA_BLOB packet_out_blob;
53 struct wrepl_wrap packet_out_wrap;
56 call = talloc_zero(wreplconn, struct wreplsrv_in_call);
57 NT_STATUS_HAVE_NO_MEMORY(call);
58 call->wreplconn = wreplconn;
59 talloc_steal(call, blob.data);
61 packet_in_blob.data = blob.data + 4;
62 packet_in_blob.length = blob.length - 4;
64 status = ndr_pull_struct_blob(&packet_in_blob, call, &call->req_packet,
65 (ndr_pull_flags_fn_t)ndr_pull_wrepl_packet);
66 NT_STATUS_NOT_OK_RETURN(status);
69 DEBUG(10,("Received WINS-Replication packet of length %u\n", packet_in_blob.length + 4));
70 NDR_PRINT_DEBUG(wrepl_packet, &call->req_packet);
73 status = wreplsrv_in_call(call);
74 NT_STATUS_IS_ERR_RETURN(status);
75 if (!NT_STATUS_IS_OK(status)) {
76 /* w2k just ignores invalid packets, so we do */
77 DEBUG(10,("Received WINS-Replication packet was invalid, we just ignore it\n"));
82 /* and now encode the reply */
83 packet_out_wrap.packet = call->rep_packet;
84 status = ndr_push_struct_blob(&packet_out_blob, call, &packet_out_wrap,
85 (ndr_push_flags_fn_t)ndr_push_wrepl_wrap);
86 NT_STATUS_NOT_OK_RETURN(status);
89 DEBUG(10,("Sending WINS-Replication packet of length %d\n", (int)packet_out_blob.length));
90 NDR_PRINT_DEBUG(wrepl_packet, &call->rep_packet);
93 if (call->terminate_after_send) {
94 struct wreplsrv_in_connection **tas;
95 tas = talloc(packet_out_blob.data, struct wreplsrv_in_connection *);
96 NT_STATUS_HAVE_NO_MEMORY(tas);
98 talloc_set_destructor(tas, terminate_after_send_destructor);
101 status = packet_send(wreplconn->packet, packet_out_blob);
102 NT_STATUS_NOT_OK_RETURN(status);
109 called when the socket becomes readable
111 static void wreplsrv_recv(struct stream_connection *conn, uint16_t flags)
113 struct wreplsrv_in_connection *wreplconn = talloc_get_type(conn->private,
114 struct wreplsrv_in_connection);
116 packet_recv(wreplconn->packet);
120 called when the socket becomes writable
122 static void wreplsrv_send(struct stream_connection *conn, uint16_t flags)
124 struct wreplsrv_in_connection *wreplconn = talloc_get_type(conn->private,
125 struct wreplsrv_in_connection);
126 packet_queue_run(wreplconn->packet);
130 handle socket recv errors
132 static void wreplsrv_recv_error(void *private, NTSTATUS status)
134 struct wreplsrv_in_connection *wreplconn = talloc_get_type(private,
135 struct wreplsrv_in_connection);
136 wreplsrv_terminate_in_connection(wreplconn, nt_errstr(status));
140 called when we get a new connection
142 static void wreplsrv_accept(struct stream_connection *conn)
144 struct wreplsrv_service *service = talloc_get_type(conn->private, struct wreplsrv_service);
145 struct wreplsrv_in_connection *wreplconn;
148 wreplconn = talloc_zero(conn, struct wreplsrv_in_connection);
150 stream_terminate_connection(conn, "wreplsrv_accept: out of memory");
154 wreplconn->packet = packet_init(wreplconn);
155 if (!wreplconn->packet) {
156 wreplsrv_terminate_in_connection(wreplconn, "wreplsrv_accept: out of memory");
159 packet_set_private(wreplconn->packet, wreplconn);
160 packet_set_socket(wreplconn->packet, conn->socket);
161 packet_set_callback(wreplconn->packet, wreplsrv_recv_request);
162 packet_set_full_request(wreplconn->packet, packet_full_request_u32);
163 packet_set_error_handler(wreplconn->packet, wreplsrv_recv_error);
164 packet_set_event_context(wreplconn->packet, conn->event.ctx);
165 packet_set_fde(wreplconn->packet, conn->event.fde);
166 packet_set_serialise(wreplconn->packet);
168 wreplconn->conn = conn;
169 wreplconn->service = service;
171 peer_ip = socket_get_peer_addr(conn->socket, wreplconn);
173 wreplsrv_terminate_in_connection(wreplconn, "wreplsrv_accept: out of memory");
177 wreplconn->partner = wreplsrv_find_partner(service, peer_ip);
179 conn->private = wreplconn;
181 irpc_add_name(conn->msg_ctx, "wreplsrv_connection");
184 static const struct stream_server_ops wreplsrv_stream_ops = {
186 .accept_connection = wreplsrv_accept,
187 .recv_handler = wreplsrv_recv,
188 .send_handler = wreplsrv_send,
192 called when we get a new connection
194 NTSTATUS wreplsrv_in_connection_merge(struct wreplsrv_partner *partner,
195 struct socket_context *sock,
196 struct packet_context *packet,
197 struct wreplsrv_in_connection **_wrepl_in)
199 struct wreplsrv_service *service = partner->service;
200 struct wreplsrv_in_connection *wrepl_in;
201 const struct model_ops *model_ops;
202 struct stream_connection *conn;
205 /* within the wrepl task we want to be a single process, so
206 ask for the single process model ops and pass these to the
207 stream_setup_socket() call. */
208 model_ops = process_model_byname("single");
210 DEBUG(0,("Can't find 'single' process model_ops"));
211 return NT_STATUS_INTERNAL_ERROR;
214 wrepl_in = talloc_zero(partner, struct wreplsrv_in_connection);
215 NT_STATUS_HAVE_NO_MEMORY(wrepl_in);
217 wrepl_in->service = service;
218 wrepl_in->partner = partner;
220 status = stream_new_connection_merge(service->task->event_ctx, model_ops,
221 sock, &wreplsrv_stream_ops, service->task->msg_ctx,
223 NT_STATUS_NOT_OK_RETURN(status);
226 * make the wreplsrv_in_connection structure a child of the
227 * stream_connection, to match the hierachie of wreplsrv_accept
229 wrepl_in->conn = conn;
230 talloc_steal(conn, wrepl_in);
233 * now update the packet handling callback,...
235 wrepl_in->packet = talloc_steal(wrepl_in, packet);
236 packet_set_private(wrepl_in->packet, wrepl_in);
237 packet_set_socket(wrepl_in->packet, conn->socket);
238 packet_set_callback(wrepl_in->packet, wreplsrv_recv_request);
239 packet_set_full_request(wrepl_in->packet, packet_full_request_u32);
240 packet_set_error_handler(wrepl_in->packet, wreplsrv_recv_error);
241 packet_set_event_context(wrepl_in->packet, conn->event.ctx);
242 packet_set_fde(wrepl_in->packet, conn->event.fde);
243 packet_set_serialise(wrepl_in->packet);
245 *_wrepl_in = wrepl_in;
250 startup the wrepl port 42 server sockets
252 NTSTATUS wreplsrv_setup_sockets(struct wreplsrv_service *service)
255 struct task_server *task = service->task;
256 const struct model_ops *model_ops;
258 uint16_t port = WINS_REPLICATION_PORT;
260 /* within the wrepl task we want to be a single process, so
261 ask for the single process model ops and pass these to the
262 stream_setup_socket() call. */
263 model_ops = process_model_byname("single");
265 DEBUG(0,("Can't find 'single' process model_ops"));
266 return NT_STATUS_INTERNAL_ERROR;
269 if (lp_interfaces() && lp_bind_interfaces_only()) {
270 int num_interfaces = iface_count();
273 /* We have been given an interfaces line, and been
274 told to only bind to those interfaces. Create a
275 socket per interface and bind to only these.
277 for(i = 0; i < num_interfaces; i++) {
278 address = iface_n_ip(i);
279 status = stream_setup_socket(task->event_ctx, model_ops, &wreplsrv_stream_ops,
280 "ipv4", address, &port, service);
281 if (!NT_STATUS_IS_OK(status)) {
282 DEBUG(0,("stream_setup_socket(address=%s,port=%u) failed - %s\n",
283 address, port, nt_errstr(status)));
288 address = lp_socket_address();
289 status = stream_setup_socket(task->event_ctx, model_ops, &wreplsrv_stream_ops,
290 "ipv4", address, &port, service);
291 if (!NT_STATUS_IS_OK(status)) {
292 DEBUG(0,("stream_setup_socket(address=%s,port=%u) failed - %s\n",
293 address, port, nt_errstr(status)));