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 2 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, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "lib/events/events.h"
27 #include "lib/socket/socket.h"
28 #include "lib/stream/packet.h"
29 #include "libcli/composite/composite.h"
30 #include "librpc/rpc/dcerpc.h"
31 #include "libcli/resolve/resolve.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 = 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 = 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 = 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 = 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 = 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 = 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 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, c->event_ctx);
336 composite_continue(c, conn_req, continue_socket_connect, c);
341 NTSTATUS dcerpc_pipe_open_socket_recv(struct composite_context *c)
343 NTSTATUS status = composite_wait(c);
350 open a rpc connection using the generic socket library
352 NTSTATUS dcerpc_pipe_open_socket(struct dcerpc_connection *conn,
353 struct socket_address *server,
354 const char *target_hostname,
355 enum dcerpc_transport_t transport)
357 struct composite_context *c;
359 c = dcerpc_pipe_open_socket_send(conn, conn, server, target_hostname, transport);
360 return dcerpc_pipe_open_socket_recv(c);
364 struct pipe_tcp_state {
366 const char *target_hostname;
369 struct socket_address *srvaddr;
370 struct dcerpc_connection *conn;
374 #if 0 /* disabled till we can resolve names to ipv6 addresses */
375 static void continue_ipv6_open_socket(struct composite_context *ctx);
377 static void continue_ipv4_open_socket(struct composite_context *ctx);
378 static void continue_ip_resolve_name(struct composite_context *ctx);
380 static void continue_ip_resolve_name(struct composite_context *ctx)
382 struct composite_context *c = talloc_get_type(ctx->async.private_data,
383 struct composite_context);
384 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
385 struct pipe_tcp_state);
386 struct composite_context *sock_ipv4_req;
388 c->status = resolve_name_recv(ctx, s, &s->address);
389 if (!composite_is_ok(c)) return;
391 /* prepare server address using host ip:port and transport name */
392 s->srvaddr = socket_address_from_strings(s->conn, "ipv4", s->address, s->port);
393 if (composite_nomem(s->srvaddr, c)) return;
395 /* resolve_nbt_name gives only ipv4 ... - send socket open request */
396 sock_ipv4_req = dcerpc_pipe_open_socket_send(c, s->conn,
397 s->srvaddr, s->target_hostname,
399 composite_continue(c, sock_ipv4_req, continue_ipv4_open_socket, c);
403 Stage 2 of dcerpc_pipe_open_tcp_send: receive result of pipe open request
404 on IPv6 and send the request on IPv4 unless IPv6 transport succeeded.
406 #if 0 /* disabled till we can resolve names to ipv6 addresses */
407 static void continue_ipv6_open_socket(struct composite_context *ctx)
409 struct composite_context *c = talloc_get_type(ctx->async.private_data,
410 struct composite_context);
411 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
412 struct pipe_tcp_state);
413 struct composite_context *sock_ipv4_req;
415 /* receive result of socket open request */
416 c->status = dcerpc_pipe_open_socket_recv(ctx);
417 if (NT_STATUS_IS_OK(c->status)) {
422 talloc_free(s->srvaddr);
424 /* prepare server address using host:ip and transport name */
425 s->srvaddr = socket_address_from_strings(s->conn, "ipv4", s->address, s->port);
426 if (composite_nomem(s->srvaddr, c)) return;
428 /* try IPv4 if IPv6 fails */
429 sock_ipv4_req = dcerpc_pipe_open_socket_send(c, s->conn,
430 s->srvaddr, s->target_hostname,
432 composite_continue(c, sock_ipv4_req, continue_ipv4_open_socket, c);
437 Stage 2 of dcerpc_pipe_open_tcp_send: receive result of pipe open request
440 static void continue_ipv4_open_socket(struct composite_context *ctx)
442 struct composite_context *c = talloc_get_type(ctx->async.private_data,
443 struct composite_context);
444 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
445 struct pipe_tcp_state);
447 /* receive result socket open request */
448 c->status = dcerpc_pipe_open_socket_recv(ctx);
449 if (!NT_STATUS_IS_OK(c->status)) {
450 /* something went wrong... */
451 DEBUG(0, ("Failed to connect host %s (%s) on port %d - %s.\n",
452 s->address, s->target_hostname,
453 s->port, nt_errstr(c->status)));
455 composite_error(c, c->status);
464 Send rpc pipe open request to given host:port using
467 struct composite_context* dcerpc_pipe_open_tcp_send(struct dcerpc_connection *conn,
469 const char *target_hostname,
472 struct composite_context *c;
473 struct pipe_tcp_state *s;
474 struct composite_context *resolve_req;
475 struct nbt_name name;
477 /* composite context allocation and setup */
478 c = composite_create(conn, conn->event_ctx);
479 if (c == NULL) return NULL;
481 s = talloc_zero(c, struct pipe_tcp_state);
482 if (composite_nomem(s, c)) return c;
485 /* store input parameters in state structure */
486 s->server = talloc_strdup(c, server);
487 if (composite_nomem(s->server, c)) return c;
488 if (target_hostname) {
489 s->target_hostname = talloc_strdup(c, target_hostname);
490 if (composite_nomem(s->target_hostname, c)) return c;
495 make_nbt_name_server(&name, server);
496 resolve_req = resolve_name_send(&name, c->event_ctx, lp_name_resolve_order());
497 composite_continue(c, resolve_req, continue_ip_resolve_name, c);
502 Receive result of pipe open request on tcp/ip
504 NTSTATUS dcerpc_pipe_open_tcp_recv(struct composite_context *c)
507 status = composite_wait(c);
515 Open rpc pipe on tcp/ip transport - sync version
517 NTSTATUS dcerpc_pipe_open_tcp(struct dcerpc_connection *conn, const char *server,
518 const char *target_hostname,
521 struct composite_context *c;
523 c = dcerpc_pipe_open_tcp_send(conn, server, target_hostname, port);
524 return dcerpc_pipe_open_tcp_recv(c);
528 struct pipe_unix_state {
530 struct socket_address *srvaddr;
531 struct dcerpc_connection *conn;
536 Stage 2 of dcerpc_pipe_open_unix_stream_send: receive result of pipe open
537 request on unix socket.
539 void continue_unix_open_socket(struct composite_context *ctx)
541 struct composite_context *c = talloc_get_type(ctx->async.private_data,
542 struct composite_context);
544 c->status = dcerpc_pipe_open_socket_recv(ctx);
545 if (NT_STATUS_IS_OK(c->status)) {
550 composite_error(c, c->status);
555 Send pipe open request on unix socket
557 struct composite_context *dcerpc_pipe_open_unix_stream_send(struct dcerpc_connection *conn,
560 struct composite_context *c;
561 struct composite_context *sock_unix_req;
562 struct pipe_unix_state *s;
564 /* composite context allocation and setup */
565 c = composite_create(conn, conn->event_ctx);
566 if (c == NULL) return NULL;
568 s = talloc_zero(c, struct pipe_unix_state);
569 if (composite_nomem(s, c)) return c;
572 /* store parameters in state structure */
573 s->path = talloc_strdup(c, path);
574 if (composite_nomem(s->path, c)) return c;
577 /* prepare server address using socket path and transport name */
578 s->srvaddr = socket_address_from_strings(conn, "unix", s->path, 0);
579 if (composite_nomem(s->srvaddr, c)) return c;
581 /* send socket open request */
582 sock_unix_req = dcerpc_pipe_open_socket_send(c, s->conn,
585 composite_continue(c, sock_unix_req, continue_unix_open_socket, c);
591 Receive result of pipe open request on unix socket
593 NTSTATUS dcerpc_pipe_open_unix_stream_recv(struct composite_context *c)
595 NTSTATUS status = composite_wait(c);
603 Open a rpc pipe on a unix socket - sync version
605 NTSTATUS dcerpc_pipe_open_unix_stream(struct dcerpc_connection *conn, const char *path)
607 struct composite_context *c = dcerpc_pipe_open_unix_stream_send(conn, path);
608 return dcerpc_pipe_open_unix_stream_recv(c);
612 struct pipe_np_state {
614 struct socket_address *srvaddr;
615 struct dcerpc_connection *conn;
620 Stage 2 of dcerpc_pipe_open_pipe_send: receive socket open request
622 void continue_np_open_socket(struct composite_context *ctx)
624 struct composite_context *c = talloc_get_type(ctx->async.private_data,
625 struct composite_context);
627 c->status = dcerpc_pipe_open_socket_recv(ctx);
628 if (!composite_is_ok(c)) return;
635 Send pipe open request on ncalrpc
637 struct composite_context* dcerpc_pipe_open_pipe_send(struct dcerpc_connection *conn,
638 const char *identifier)
642 struct composite_context *c;
643 struct composite_context *sock_np_req;
644 struct pipe_np_state *s;
646 /* composite context allocation and setup */
647 c = composite_create(conn, conn->event_ctx);
648 if (c == NULL) return NULL;
650 s = talloc_zero(c, struct pipe_np_state);
651 if (composite_nomem(s, c)) return c;
654 /* store parameters in state structure */
655 canon = talloc_strdup(s, identifier);
656 if (composite_nomem(canon, c)) return c;
659 string_replace(canon, '/', '\\');
660 s->full_path = talloc_asprintf(canon, "%s/%s", lp_ncalrpc_dir(), canon);
661 if (composite_nomem(s->full_path, c)) return c;
663 /* prepare server address using path and transport name */
664 s->srvaddr = socket_address_from_strings(conn, "unix", s->full_path, 0);
665 if (composite_nomem(s->srvaddr, c)) return c;
667 /* send socket open request */
668 sock_np_req = dcerpc_pipe_open_socket_send(c, s->conn, s->srvaddr, NULL, NCALRPC);
669 composite_continue(c, sock_np_req, continue_np_open_socket, c);
675 Receive result of pipe open request on ncalrpc
677 NTSTATUS dcerpc_pipe_open_pipe_recv(struct composite_context *c)
679 NTSTATUS status = composite_wait(c);
687 Open a rpc pipe on a named pipe - sync version
689 NTSTATUS dcerpc_pipe_open_pipe(struct dcerpc_connection *conn, const char *identifier)
691 struct composite_context *c = dcerpc_pipe_open_pipe_send(conn, identifier);
692 return dcerpc_pipe_open_pipe_recv(c);