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 "dlinklist.h"
25 #include "lib/events/events.h"
26 #include "lib/socket/socket.h"
27 #include "smbd/service_task.h"
28 #include "smbd/service_stream.h"
29 #include "lib/messaging/irpc.h"
30 #include "librpc/gen_ndr/ndr_winsrepl.h"
31 #include "wrepl_server/wrepl_server.h"
32 #include "nbt_server/wins/winsdb.h"
33 #include "ldb/include/ldb.h"
35 void wreplsrv_terminate_in_connection(struct wreplsrv_in_connection *wreplconn, const char *reason)
37 stream_terminate_connection(wreplconn->conn, reason);
41 called when we get a new connection
43 static void wreplsrv_accept(struct stream_connection *conn)
45 struct wreplsrv_service *service = talloc_get_type(conn->private, struct wreplsrv_service);
46 struct wreplsrv_in_connection *wreplconn;
49 wreplconn = talloc_zero(conn, struct wreplsrv_in_connection);
51 stream_terminate_connection(conn, "wreplsrv_accept: out of memory");
55 wreplconn->conn = conn;
56 wreplconn->service = service;
57 wreplconn->our_ip = socket_get_my_addr(conn->socket, wreplconn);
58 if (!wreplconn->our_ip) {
59 wreplsrv_terminate_in_connection(wreplconn, "wreplsrv_accept: out of memory");
63 peer_ip = socket_get_peer_addr(conn->socket, wreplconn);
65 wreplsrv_terminate_in_connection(wreplconn, "wreplsrv_accept: out of memory");
69 wreplconn->partner = wreplsrv_find_partner(service, peer_ip);
71 conn->private = wreplconn;
73 irpc_add_name(conn->msg_ctx, "wreplsrv_connection");
77 receive some data on a WREPL connection
79 static void wreplsrv_recv(struct stream_connection *conn, uint16_t flags)
81 struct wreplsrv_in_connection *wreplconn = talloc_get_type(conn->private, struct wreplsrv_in_connection);
82 struct wreplsrv_in_call *call;
83 DATA_BLOB packet_in_blob;
84 DATA_BLOB packet_out_blob;
85 struct wrepl_wrap packet_out_wrap;
86 struct data_blob_list_item *rep;
87 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
90 /* avoid recursion, because of half async code */
91 if (wreplconn->processing) {
92 EVENT_FD_NOT_READABLE(conn->event.fde);
96 if (wreplconn->partial.length == 0) {
97 wreplconn->partial = data_blob_talloc(wreplconn, NULL, 4);
98 if (wreplconn->partial.data == NULL) {
99 status = NT_STATUS_NO_MEMORY;
102 wreplconn->partial_read = 0;
105 /* read in the packet length */
106 if (wreplconn->partial_read < 4) {
107 uint32_t packet_length;
109 status = socket_recv(conn->socket,
110 wreplconn->partial.data + wreplconn->partial_read,
111 4 - wreplconn->partial_read,
113 if (NT_STATUS_IS_ERR(status)) goto failed;
114 if (!NT_STATUS_IS_OK(status)) return;
116 wreplconn->partial_read += nread;
117 if (wreplconn->partial_read != 4) return;
119 packet_length = RIVAL(wreplconn->partial.data, 0) + 4;
121 wreplconn->partial.data = talloc_realloc(wreplconn, wreplconn->partial.data,
122 uint8_t, packet_length);
123 if (wreplconn->partial.data == NULL) {
124 status = NT_STATUS_NO_MEMORY;
127 wreplconn->partial.length = packet_length;
130 /* read in the body */
131 status = socket_recv(conn->socket,
132 wreplconn->partial.data + wreplconn->partial_read,
133 wreplconn->partial.length - wreplconn->partial_read,
135 if (NT_STATUS_IS_ERR(status)) goto failed;
136 if (!NT_STATUS_IS_OK(status)) return;
138 wreplconn->partial_read += nread;
139 if (wreplconn->partial_read != wreplconn->partial.length) return;
141 packet_in_blob.data = wreplconn->partial.data + 4;
142 packet_in_blob.length = wreplconn->partial.length - 4;
144 call = talloc_zero(wreplconn, struct wreplsrv_in_call);
146 status = NT_STATUS_NO_MEMORY;
149 call->wreplconn = wreplconn;
151 /* we have a full request - parse it */
152 status = ndr_pull_struct_blob(&packet_in_blob,
153 call, &call->req_packet,
154 (ndr_pull_flags_fn_t)ndr_pull_wrepl_packet);
155 if (!NT_STATUS_IS_OK(status)) {
156 DEBUG(2,("Failed to parse incoming WINS-Replication packet - %s\n",
158 DEBUG(10,("packet length %u\n", wreplconn->partial.length));
159 NDR_PRINT_DEBUG(wrepl_packet, &call->req_packet);
164 * we have parsed the request, so we can reset the wreplconn->partial_read,
165 * maybe we could also free wreplconn->partial, but for now we keep it,
166 * and overwrite it the next time
168 wreplconn->partial_read = 0;
171 DEBUG(10,("Received WINS-Replication packet of length %u\n", wreplconn->partial.length));
172 NDR_PRINT_DEBUG(wrepl_packet, &call->req_packet);
175 /* actually process the request */
176 wreplconn->processing = True;
177 status = wreplsrv_in_call(call);
178 wreplconn->processing = False;
179 if (NT_STATUS_IS_ERR(status)) goto failed;
180 if (!NT_STATUS_IS_OK(status)) {
181 /* w2k just ignores invalid packets, so we do */
182 DEBUG(10,("Received WINS-Replication packet was invalid, we just ignore it\n"));
187 /* and now encode the reply */
188 packet_out_wrap.packet = call->rep_packet;
189 status = ndr_push_struct_blob(&packet_out_blob, call, &packet_out_wrap,
190 (ndr_push_flags_fn_t)ndr_push_wrepl_wrap);
191 if (!NT_STATUS_IS_OK(status)) goto failed;
194 DEBUG(10,("Sending WINS-Replication packet of length %d\n", (int)packet_out_blob.length));
195 NDR_PRINT_DEBUG(wrepl_packet, &call->rep_packet);
198 rep = talloc(wreplconn, struct data_blob_list_item);
200 status = NT_STATUS_NO_MEMORY;
204 rep->blob = packet_out_blob;
205 talloc_steal(rep, packet_out_blob.data);
206 /* we don't need the call anymore */
209 if (!wreplconn->send_queue) {
210 EVENT_FD_WRITEABLE(conn->event.fde);
212 DLIST_ADD_END(wreplconn->send_queue, rep, struct data_blob_list_item *);
214 if (wreplconn->terminate) {
215 EVENT_FD_NOT_READABLE(conn->event.fde);
217 EVENT_FD_READABLE(conn->event.fde);
222 wreplsrv_terminate_in_connection(wreplconn, nt_errstr(status));
226 called when we can write to a connection
228 static void wreplsrv_send(struct stream_connection *conn, uint16_t flags)
230 struct wreplsrv_in_connection *wreplconn = talloc_get_type(conn->private, struct wreplsrv_in_connection);
233 while (wreplconn->send_queue) {
234 struct data_blob_list_item *rep = wreplconn->send_queue;
237 status = socket_send(conn->socket, &rep->blob, &sendlen, 0);
238 if (NT_STATUS_IS_ERR(status)) goto failed;
239 if (!NT_STATUS_IS_OK(status)) return;
241 rep->blob.length -= sendlen;
242 rep->blob.data += sendlen;
244 if (rep->blob.length == 0) {
245 DLIST_REMOVE(wreplconn->send_queue, rep);
250 if (wreplconn->terminate) {
251 wreplsrv_terminate_in_connection(wreplconn, "connection terminated after all pending packets are send");
255 EVENT_FD_NOT_WRITEABLE(conn->event.fde);
259 wreplsrv_terminate_in_connection(wreplconn, nt_errstr(status));
262 static const struct stream_server_ops wreplsrv_stream_ops = {
264 .accept_connection = wreplsrv_accept,
265 .recv_handler = wreplsrv_recv,
266 .send_handler = wreplsrv_send,
270 called when we get a new connection
272 NTSTATUS wreplsrv_in_connection_merge(struct wreplsrv_partner *partner,
273 struct socket_context *sock,
274 struct wreplsrv_in_connection **_wrepl_in)
276 struct wreplsrv_service *service = partner->service;
277 struct wreplsrv_in_connection *wrepl_in;
278 const struct model_ops *model_ops;
279 struct stream_connection *conn;
282 /* within the wrepl task we want to be a single process, so
283 ask for the single process model ops and pass these to the
284 stream_setup_socket() call. */
285 model_ops = process_model_byname("single");
287 DEBUG(0,("Can't find 'single' process model_ops"));
288 return NT_STATUS_INTERNAL_ERROR;
291 wrepl_in = talloc_zero(partner, struct wreplsrv_in_connection);
292 NT_STATUS_HAVE_NO_MEMORY(wrepl_in);
294 wrepl_in->service = service;
295 wrepl_in->partner = partner;
296 wrepl_in->our_ip = socket_get_my_addr(sock, wrepl_in);
297 NT_STATUS_HAVE_NO_MEMORY(wrepl_in->our_ip);
299 status = stream_new_connection_merge(service->task->event_ctx, model_ops,
300 sock, &wreplsrv_stream_ops, service->task->msg_ctx,
302 NT_STATUS_NOT_OK_RETURN(status);
304 wrepl_in->conn = conn;
305 talloc_steal(conn, wrepl_in);
307 *_wrepl_in = wrepl_in;
312 startup the wrepl port 42 server sockets
314 NTSTATUS wreplsrv_setup_sockets(struct wreplsrv_service *service)
317 struct task_server *task = service->task;
318 const struct model_ops *model_ops;
320 uint16_t port = WINS_REPLICATION_PORT;
322 /* within the wrepl task we want to be a single process, so
323 ask for the single process model ops and pass these to the
324 stream_setup_socket() call. */
325 model_ops = process_model_byname("single");
327 DEBUG(0,("Can't find 'single' process model_ops"));
328 return NT_STATUS_INTERNAL_ERROR;
331 if (lp_interfaces() && lp_bind_interfaces_only()) {
332 int num_interfaces = iface_count();
335 /* We have been given an interfaces line, and been
336 told to only bind to those interfaces. Create a
337 socket per interface and bind to only these.
339 for(i = 0; i < num_interfaces; i++) {
340 address = iface_n_ip(i);
341 status = stream_setup_socket(task->event_ctx, model_ops, &wreplsrv_stream_ops,
342 "ipv4", address, &port, service);
343 if (!NT_STATUS_IS_OK(status)) {
344 DEBUG(0,("stream_setup_socket(address=%s,port=%u) failed - %s\n",
345 address, port, nt_errstr(status)));
350 address = lp_socket_address();
351 status = stream_setup_socket(task->event_ctx, model_ops, &wreplsrv_stream_ops,
352 "ipv4", address, &port, service);
353 if (!NT_STATUS_IS_OK(status)) {
354 DEBUG(0,("stream_setup_socket(address=%s,port=%u) failed - %s\n",
355 address, port, nt_errstr(status)));