2 Unix SMB/CIFS implementation.
4 dcerpc over standard sockets transport
6 Copyright (C) Andrew Tridgell 2003
7 Copyright (C) Jelmer Vernooij 2004
8 Copyright (C) Rafal Szczesniak 2006
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "lib/events/events.h"
26 #include "lib/socket/socket.h"
27 #include "lib/stream/packet.h"
28 #include "libcli/composite/composite.h"
29 #include "librpc/rpc/dcerpc.h"
30 #include "libcli/resolve/resolve.h"
31 #include "param/param.h"
33 /* transport private information used by general socket pipe transports */
36 struct socket_context *sock;
39 struct packet_context *packet;
40 uint32_t pending_reads;
47 static void sock_dead(struct dcerpc_connection *p, NTSTATUS status)
49 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
54 packet_recv_disable(sock->packet);
55 packet_set_fde(sock->packet, NULL);
56 packet_set_socket(sock->packet, NULL);
60 talloc_free(sock->fde);
65 talloc_free(sock->sock);
69 if (NT_STATUS_EQUAL(NT_STATUS_UNSUCCESSFUL, status)) {
70 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
73 if (NT_STATUS_EQUAL(NT_STATUS_OK, status)) {
74 status = NT_STATUS_END_OF_FILE;
77 if (p->transport.recv_data) {
78 p->transport.recv_data(p, NULL, status);
84 handle socket recv errors
86 static void sock_error_handler(void *private, NTSTATUS status)
88 struct dcerpc_connection *p = talloc_get_type(private,
89 struct dcerpc_connection);
94 check if a blob is a complete packet
96 static NTSTATUS sock_complete_packet(void *private, DATA_BLOB blob, size_t *size)
98 if (blob.length < DCERPC_FRAG_LEN_OFFSET+2) {
99 return STATUS_MORE_ENTRIES;
101 *size = dcerpc_get_frag_length(&blob);
102 if (*size > blob.length) {
103 return STATUS_MORE_ENTRIES;
109 process recv requests
111 static NTSTATUS sock_process_recv(void *private, DATA_BLOB blob)
113 struct dcerpc_connection *p = talloc_get_type(private,
114 struct dcerpc_connection);
115 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
116 sock->pending_reads--;
117 if (sock->pending_reads == 0) {
118 packet_recv_disable(sock->packet);
120 p->transport.recv_data(p, &blob, NT_STATUS_OK);
125 called when a IO is triggered by the events system
127 static void sock_io_handler(struct event_context *ev, struct fd_event *fde,
128 uint16_t flags, void *private)
130 struct dcerpc_connection *p = talloc_get_type(private,
131 struct dcerpc_connection);
132 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
134 if (flags & EVENT_FD_WRITE) {
135 packet_queue_run(sock->packet);
139 if (sock->sock == NULL) {
143 if (flags & EVENT_FD_READ) {
144 packet_recv(sock->packet);
149 initiate a read request - not needed for dcerpc sockets
151 static NTSTATUS sock_send_read(struct dcerpc_connection *p)
153 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
154 sock->pending_reads++;
155 if (sock->pending_reads == 1) {
156 packet_recv_enable(sock->packet);
162 send an initial pdu in a multi-pdu sequence
164 static NTSTATUS sock_send_request(struct dcerpc_connection *p, DATA_BLOB *data,
167 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
171 if (sock->sock == NULL) {
172 return NT_STATUS_CONNECTION_DISCONNECTED;
175 blob = data_blob_talloc(sock->packet, data->data, data->length);
176 if (blob.data == NULL) {
177 return NT_STATUS_NO_MEMORY;
180 status = packet_send(sock->packet, blob);
181 if (!NT_STATUS_IS_OK(status)) {
193 shutdown sock pipe connection
195 static NTSTATUS sock_shutdown_pipe(struct dcerpc_connection *p, NTSTATUS status)
197 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
199 if (sock && sock->sock) {
200 sock_dead(p, status);
207 return sock server name
209 static const char *sock_peer_name(struct dcerpc_connection *p)
211 struct sock_private *sock = talloc_get_type(p->transport.private_data, struct sock_private);
212 return sock->server_name;
216 return remote name we make the actual connection (good for kerberos)
218 static const char *sock_target_hostname(struct dcerpc_connection *p)
220 struct sock_private *sock = talloc_get_type(p->transport.private_data, struct sock_private);
221 return sock->server_name;
225 struct pipe_open_socket_state {
226 struct dcerpc_connection *conn;
227 struct socket_context *socket_ctx;
228 struct sock_private *sock;
229 struct socket_address *server;
230 const char *target_hostname;
231 enum dcerpc_transport_t transport;
235 static void continue_socket_connect(struct composite_context *ctx)
237 struct dcerpc_connection *conn;
238 struct sock_private *sock;
239 struct composite_context *c = talloc_get_type(ctx->async.private_data,
240 struct composite_context);
241 struct pipe_open_socket_state *s = talloc_get_type(c->private_data,
242 struct pipe_open_socket_state);
244 /* make it easier to write a function calls */
248 c->status = socket_connect_recv(ctx);
249 if (!NT_STATUS_IS_OK(c->status)) {
250 DEBUG(0, ("Failed to connect host %s on port %d - %s\n",
251 s->server->addr, s->server->port,
252 nt_errstr(c->status)));
253 composite_error(c, c->status);
258 fill in the transport methods
260 conn->transport.transport = s->transport;
261 conn->transport.private_data = NULL;
263 conn->transport.send_request = sock_send_request;
264 conn->transport.send_read = sock_send_read;
265 conn->transport.recv_data = NULL;
267 conn->transport.shutdown_pipe = sock_shutdown_pipe;
268 conn->transport.peer_name = sock_peer_name;
269 conn->transport.target_hostname = sock_target_hostname;
271 sock->sock = s->socket_ctx;
272 sock->pending_reads = 0;
273 sock->server_name = strupper_talloc(sock, s->target_hostname);
275 sock->fde = event_add_fd(conn->event_ctx, sock->sock, socket_get_fd(sock->sock),
276 EVENT_FD_READ, sock_io_handler, conn);
278 conn->transport.private_data = sock;
280 sock->packet = packet_init(sock);
281 if (sock->packet == NULL) {
282 composite_error(c, NT_STATUS_NO_MEMORY);
287 packet_set_private(sock->packet, conn);
288 packet_set_socket(sock->packet, sock->sock);
289 packet_set_callback(sock->packet, sock_process_recv);
290 packet_set_full_request(sock->packet, sock_complete_packet);
291 packet_set_error_handler(sock->packet, sock_error_handler);
292 packet_set_event_context(sock->packet, conn->event_ctx);
293 packet_set_fde(sock->packet, sock->fde);
294 packet_set_serialise(sock->packet);
295 packet_set_initial_read(sock->packet, 16);
297 /* ensure we don't get SIGPIPE */
298 BlockSignals(true, SIGPIPE);
304 static struct composite_context *dcerpc_pipe_open_socket_send(TALLOC_CTX *mem_ctx,
305 struct dcerpc_connection *cn,
306 struct socket_address *server,
307 const char *target_hostname,
308 enum dcerpc_transport_t transport)
310 struct composite_context *c;
311 struct pipe_open_socket_state *s;
312 struct composite_context *conn_req;
314 c = composite_create(mem_ctx, cn->event_ctx);
315 if (c == NULL) return NULL;
317 s = talloc_zero(c, struct pipe_open_socket_state);
318 if (composite_nomem(s, c)) return c;
322 s->transport = transport;
323 s->server = talloc_reference(c, server);
324 if (composite_nomem(s->server, c)) return c;
325 s->target_hostname = talloc_reference(s, target_hostname);
327 s->sock = talloc(cn, struct sock_private);
328 if (composite_nomem(s->sock, c)) return c;
330 c->status = socket_create(server->family, SOCKET_TYPE_STREAM, &s->socket_ctx, 0);
331 if (!composite_is_ok(c)) return c;
333 talloc_steal(s->sock, s->socket_ctx);
335 conn_req = socket_connect_send(s->socket_ctx, NULL, s->server, 0,
336 lp_resolve_context(global_loadparm),
338 composite_continue(c, conn_req, continue_socket_connect, c);
343 static NTSTATUS dcerpc_pipe_open_socket_recv(struct composite_context *c)
345 NTSTATUS status = composite_wait(c);
351 struct pipe_tcp_state {
353 const char *target_hostname;
356 struct socket_address *srvaddr;
357 struct dcerpc_connection *conn;
361 #if 0 /* disabled till we can resolve names to ipv6 addresses */
362 static void continue_ipv6_open_socket(struct composite_context *ctx);
364 static void continue_ipv4_open_socket(struct composite_context *ctx);
365 static void continue_ip_resolve_name(struct composite_context *ctx);
367 static void continue_ip_resolve_name(struct composite_context *ctx)
369 struct composite_context *c = talloc_get_type(ctx->async.private_data,
370 struct composite_context);
371 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
372 struct pipe_tcp_state);
373 struct composite_context *sock_ipv4_req;
375 c->status = resolve_name_recv(ctx, s, &s->address);
376 if (!composite_is_ok(c)) return;
378 /* prepare server address using host ip:port and transport name */
379 s->srvaddr = socket_address_from_strings(s->conn, "ipv4", s->address, s->port);
380 if (composite_nomem(s->srvaddr, c)) return;
382 /* resolve_nbt_name gives only ipv4 ... - send socket open request */
383 sock_ipv4_req = dcerpc_pipe_open_socket_send(c, s->conn,
384 s->srvaddr, s->target_hostname,
386 composite_continue(c, sock_ipv4_req, continue_ipv4_open_socket, c);
390 Stage 2 of dcerpc_pipe_open_tcp_send: receive result of pipe open request
391 on IPv6 and send the request on IPv4 unless IPv6 transport succeeded.
393 #if 0 /* disabled till we can resolve names to ipv6 addresses */
394 static void continue_ipv6_open_socket(struct composite_context *ctx)
396 struct composite_context *c = talloc_get_type(ctx->async.private_data,
397 struct composite_context);
398 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
399 struct pipe_tcp_state);
400 struct composite_context *sock_ipv4_req;
402 /* receive result of socket open request */
403 c->status = dcerpc_pipe_open_socket_recv(ctx);
404 if (NT_STATUS_IS_OK(c->status)) {
409 talloc_free(s->srvaddr);
411 /* prepare server address using host:ip and transport name */
412 s->srvaddr = socket_address_from_strings(s->conn, "ipv4", s->address, s->port);
413 if (composite_nomem(s->srvaddr, c)) return;
415 /* try IPv4 if IPv6 fails */
416 sock_ipv4_req = dcerpc_pipe_open_socket_send(c, s->conn,
417 s->srvaddr, s->target_hostname,
419 composite_continue(c, sock_ipv4_req, continue_ipv4_open_socket, c);
424 Stage 2 of dcerpc_pipe_open_tcp_send: receive result of pipe open request
427 static void continue_ipv4_open_socket(struct composite_context *ctx)
429 struct composite_context *c = talloc_get_type(ctx->async.private_data,
430 struct composite_context);
431 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
432 struct pipe_tcp_state);
434 /* receive result socket open request */
435 c->status = dcerpc_pipe_open_socket_recv(ctx);
436 if (!NT_STATUS_IS_OK(c->status)) {
437 /* something went wrong... */
438 DEBUG(0, ("Failed to connect host %s (%s) on port %d - %s.\n",
439 s->address, s->target_hostname,
440 s->port, nt_errstr(c->status)));
442 composite_error(c, c->status);
451 Send rpc pipe open request to given host:port using
454 struct composite_context* dcerpc_pipe_open_tcp_send(struct dcerpc_connection *conn,
456 const char *target_hostname,
458 struct resolve_context *resolve_ctx)
460 struct composite_context *c;
461 struct pipe_tcp_state *s;
462 struct composite_context *resolve_req;
463 struct nbt_name name;
465 /* composite context allocation and setup */
466 c = composite_create(conn, conn->event_ctx);
467 if (c == NULL) return NULL;
469 s = talloc_zero(c, struct pipe_tcp_state);
470 if (composite_nomem(s, c)) return c;
473 /* store input parameters in state structure */
474 s->server = talloc_strdup(c, server);
475 if (composite_nomem(s->server, c)) return c;
476 if (target_hostname) {
477 s->target_hostname = talloc_strdup(c, target_hostname);
478 if (composite_nomem(s->target_hostname, c)) return c;
483 make_nbt_name_server(&name, server);
484 resolve_req = resolve_name_send(resolve_ctx, &name, c->event_ctx);
485 composite_continue(c, resolve_req, continue_ip_resolve_name, c);
490 Receive result of pipe open request on tcp/ip
492 NTSTATUS dcerpc_pipe_open_tcp_recv(struct composite_context *c)
495 status = composite_wait(c);
502 struct pipe_unix_state {
504 struct socket_address *srvaddr;
505 struct dcerpc_connection *conn;
510 Stage 2 of dcerpc_pipe_open_unix_stream_send: receive result of pipe open
511 request on unix socket.
513 static void continue_unix_open_socket(struct composite_context *ctx)
515 struct composite_context *c = talloc_get_type(ctx->async.private_data,
516 struct composite_context);
518 c->status = dcerpc_pipe_open_socket_recv(ctx);
519 if (NT_STATUS_IS_OK(c->status)) {
524 composite_error(c, c->status);
529 Send pipe open request on unix socket
531 struct composite_context *dcerpc_pipe_open_unix_stream_send(struct dcerpc_connection *conn,
534 struct composite_context *c;
535 struct composite_context *sock_unix_req;
536 struct pipe_unix_state *s;
538 /* composite context allocation and setup */
539 c = composite_create(conn, conn->event_ctx);
540 if (c == NULL) return NULL;
542 s = talloc_zero(c, struct pipe_unix_state);
543 if (composite_nomem(s, c)) return c;
546 /* store parameters in state structure */
547 s->path = talloc_strdup(c, path);
548 if (composite_nomem(s->path, c)) return c;
551 /* prepare server address using socket path and transport name */
552 s->srvaddr = socket_address_from_strings(conn, "unix", s->path, 0);
553 if (composite_nomem(s->srvaddr, c)) return c;
555 /* send socket open request */
556 sock_unix_req = dcerpc_pipe_open_socket_send(c, s->conn,
559 composite_continue(c, sock_unix_req, continue_unix_open_socket, c);
565 Receive result of pipe open request on unix socket
567 NTSTATUS dcerpc_pipe_open_unix_stream_recv(struct composite_context *c)
569 NTSTATUS status = composite_wait(c);
576 struct pipe_np_state {
578 struct socket_address *srvaddr;
579 struct dcerpc_connection *conn;
584 Stage 2 of dcerpc_pipe_open_pipe_send: receive socket open request
586 static void continue_np_open_socket(struct composite_context *ctx)
588 struct composite_context *c = talloc_get_type(ctx->async.private_data,
589 struct composite_context);
591 c->status = dcerpc_pipe_open_socket_recv(ctx);
592 if (!composite_is_ok(c)) return;
599 Send pipe open request on ncalrpc
601 struct composite_context* dcerpc_pipe_open_pipe_send(struct dcerpc_connection *conn,
602 const char *ncalrpc_dir,
603 const char *identifier)
607 struct composite_context *c;
608 struct composite_context *sock_np_req;
609 struct pipe_np_state *s;
611 /* composite context allocation and setup */
612 c = composite_create(conn, conn->event_ctx);
613 if (c == NULL) return NULL;
615 s = talloc_zero(c, struct pipe_np_state);
616 if (composite_nomem(s, c)) return c;
619 /* store parameters in state structure */
620 canon = talloc_strdup(s, identifier);
621 if (composite_nomem(canon, c)) return c;
624 string_replace(canon, '/', '\\');
625 s->full_path = talloc_asprintf(canon, "%s/%s", ncalrpc_dir, canon);
626 if (composite_nomem(s->full_path, c)) return c;
628 /* prepare server address using path and transport name */
629 s->srvaddr = socket_address_from_strings(conn, "unix", s->full_path, 0);
630 if (composite_nomem(s->srvaddr, c)) return c;
632 /* send socket open request */
633 sock_np_req = dcerpc_pipe_open_socket_send(c, s->conn, s->srvaddr, NULL, NCALRPC);
634 composite_continue(c, sock_np_req, continue_np_open_socket, c);
640 Receive result of pipe open request on ncalrpc
642 NTSTATUS dcerpc_pipe_open_pipe_recv(struct composite_context *c)
644 NTSTATUS status = composite_wait(c);
652 Open a rpc pipe on a named pipe - sync version
654 NTSTATUS dcerpc_pipe_open_pipe(struct dcerpc_connection *conn, const char *ncalrpc_dir, const char *identifier)
656 struct composite_context *c = dcerpc_pipe_open_pipe_send(conn, ncalrpc_dir, identifier);
657 return dcerpc_pipe_open_pipe_recv(c);