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"
31 /* transport private information used by general socket pipe transports */
34 struct socket_context *sock;
37 struct packet_context *packet;
38 uint32_t pending_reads;
45 static void sock_dead(struct dcerpc_connection *p, NTSTATUS status)
47 struct sock_private *sock = p->transport.private;
49 if (sock && sock->sock != NULL) {
50 talloc_free(sock->fde);
51 talloc_free(sock->sock);
55 if (!NT_STATUS_IS_OK(status)) {
56 p->transport.recv_data(p, NULL, status);
62 handle socket recv errors
64 static void sock_error_handler(void *private, NTSTATUS status)
66 struct dcerpc_connection *p = talloc_get_type(private,
67 struct dcerpc_connection);
72 check if a blob is a complete packet
74 static NTSTATUS sock_complete_packet(void *private, DATA_BLOB blob, size_t *size)
76 if (blob.length < DCERPC_FRAG_LEN_OFFSET+2) {
77 return STATUS_MORE_ENTRIES;
79 *size = dcerpc_get_frag_length(&blob);
80 if (*size > blob.length) {
81 return STATUS_MORE_ENTRIES;
89 static NTSTATUS sock_process_recv(void *private, DATA_BLOB blob)
91 struct dcerpc_connection *p = talloc_get_type(private,
92 struct dcerpc_connection);
93 struct sock_private *sock = p->transport.private;
94 sock->pending_reads--;
95 if (sock->pending_reads == 0) {
96 packet_recv_disable(sock->packet);
98 p->transport.recv_data(p, &blob, NT_STATUS_OK);
103 called when a IO is triggered by the events system
105 static void sock_io_handler(struct event_context *ev, struct fd_event *fde,
106 uint16_t flags, void *private)
108 struct dcerpc_connection *p = talloc_get_type(private,
109 struct dcerpc_connection);
110 struct sock_private *sock = p->transport.private;
112 if (flags & EVENT_FD_WRITE) {
113 packet_queue_run(sock->packet);
117 if (sock->sock == NULL) {
121 if (flags & EVENT_FD_READ) {
122 packet_recv(sock->packet);
127 initiate a read request - not needed for dcerpc sockets
129 static NTSTATUS sock_send_read(struct dcerpc_connection *p)
131 struct sock_private *sock = p->transport.private;
132 sock->pending_reads++;
133 if (sock->pending_reads == 1) {
134 packet_recv_enable(sock->packet);
140 send an initial pdu in a multi-pdu sequence
142 static NTSTATUS sock_send_request(struct dcerpc_connection *p, DATA_BLOB *data,
145 struct sock_private *sock = p->transport.private;
149 if (sock->sock == NULL) {
150 return NT_STATUS_CONNECTION_DISCONNECTED;
153 blob = data_blob_talloc(sock->packet, data->data, data->length);
154 if (blob.data == NULL) {
155 return NT_STATUS_NO_MEMORY;
158 status = packet_send(sock->packet, blob);
159 if (!NT_STATUS_IS_OK(status)) {
171 shutdown sock pipe connection
173 static NTSTATUS sock_shutdown_pipe(struct dcerpc_connection *p)
175 struct sock_private *sock = p->transport.private;
177 if (sock && sock->sock) {
178 sock_dead(p, NT_STATUS_OK);
185 return sock server name
187 static const char *sock_peer_name(struct dcerpc_connection *p)
189 struct sock_private *sock = p->transport.private;
190 return sock->server_name;
194 struct pipe_open_socket_state {
195 struct dcerpc_connection *conn;
196 struct socket_context *socket_ctx;
197 struct sock_private *sock;
198 struct socket_address *server;
199 enum dcerpc_transport_t transport;
203 static void continue_socket_connect(struct composite_context *ctx)
205 struct dcerpc_connection *conn;
206 struct sock_private *sock;
207 struct composite_context *c = talloc_get_type(ctx->async.private_data,
208 struct composite_context);
209 struct pipe_open_socket_state *s = talloc_get_type(c->private_data,
210 struct pipe_open_socket_state);
212 /* make it easier to write a function calls */
216 c->status = socket_connect_recv(ctx);
217 if (!NT_STATUS_IS_OK(c->status)) {
218 DEBUG(0, ("Failed to connect host %s on port %d - %s\n",
219 s->server->addr, s->server->port,
220 nt_errstr(c->status)));
221 composite_error(c, c->status);
226 fill in the transport methods
228 conn->transport.transport = s->transport;
229 conn->transport.private = NULL;
231 conn->transport.send_request = sock_send_request;
232 conn->transport.send_read = sock_send_read;
233 conn->transport.recv_data = NULL;
235 conn->transport.shutdown_pipe = sock_shutdown_pipe;
236 conn->transport.peer_name = sock_peer_name;
238 sock->sock = s->socket_ctx;
239 sock->pending_reads = 0;
240 sock->server_name = strupper_talloc(sock, s->server->addr);
242 sock->fde = event_add_fd(conn->event_ctx, sock->sock, socket_get_fd(sock->sock),
243 0, sock_io_handler, conn);
245 conn->transport.private = sock;
247 sock->packet = packet_init(sock);
248 if (sock->packet == NULL) {
249 composite_error(c, NT_STATUS_NO_MEMORY);
254 packet_set_private(sock->packet, conn);
255 packet_set_socket(sock->packet, sock->sock);
256 packet_set_callback(sock->packet, sock_process_recv);
257 packet_set_full_request(sock->packet, sock_complete_packet);
258 packet_set_error_handler(sock->packet, sock_error_handler);
259 packet_set_event_context(sock->packet, conn->event_ctx);
260 packet_set_fde(sock->packet, sock->fde);
261 packet_set_serialise(sock->packet);
262 packet_recv_disable(sock->packet);
263 packet_set_initial_read(sock->packet, 16);
265 /* ensure we don't get SIGPIPE */
266 BlockSignals(True,SIGPIPE);
272 struct composite_context *dcerpc_pipe_open_socket_send(TALLOC_CTX *mem_ctx,
273 struct dcerpc_connection *cn,
274 struct socket_address *server,
275 enum dcerpc_transport_t transport)
278 struct composite_context *c;
279 struct pipe_open_socket_state *s;
280 struct composite_context *conn_req;
282 c = talloc_zero(mem_ctx, struct composite_context);
283 if (c == NULL) return NULL;
285 s = talloc_zero(c, struct pipe_open_socket_state);
287 composite_error(c, NT_STATUS_NO_MEMORY);
291 c->state = COMPOSITE_STATE_IN_PROGRESS;
293 c->event_ctx = cn->event_ctx;
296 s->transport = transport;
297 s->server = talloc_reference(c, server);
298 if (s->server == NULL) {
299 composite_error(c, NT_STATUS_NO_MEMORY);
303 s->sock = talloc(cn, struct sock_private);
304 if (s->sock == NULL) {
305 composite_error(c, NT_STATUS_NO_MEMORY);
309 status = socket_create(server->family, SOCKET_TYPE_STREAM, &s->socket_ctx, 0);
310 if (!NT_STATUS_IS_OK(status)) {
311 composite_error(c, status);
312 talloc_free(s->sock);
315 talloc_steal(s->sock, s->socket_ctx);
317 conn_req = socket_connect_send(s->socket_ctx, NULL, s->server, 0, c->event_ctx);
318 if (conn_req == NULL) {
319 composite_error(c, NT_STATUS_NO_MEMORY);
323 composite_continue(c, conn_req, continue_socket_connect, c);
330 NTSTATUS dcerpc_pipe_open_socket_recv(struct composite_context *c)
332 NTSTATUS status = composite_wait(c);
339 open a rpc connection using the generic socket library
341 NTSTATUS dcerpc_pipe_open_socket(struct dcerpc_connection *conn,
342 struct socket_address *server,
343 enum dcerpc_transport_t transport)
345 struct composite_context *c;
347 c = dcerpc_pipe_open_socket_send(conn, conn, server, transport);
348 return dcerpc_pipe_open_socket_recv(c);
352 struct pipe_tcp_state {
355 struct socket_address *srvaddr;
356 struct dcerpc_connection *conn;
360 void continue_ipv6_open_socket(struct composite_context *ctx);
361 void continue_ipv4_open_socket(struct composite_context *ctx);
365 Stage 2 of dcerpc_pipe_open_tcp_send: receive result of pipe open request
366 on IPv6 and send the request on IPv4 unless IPv6 transport succeeded.
368 void continue_ipv6_open_socket(struct composite_context *ctx)
370 struct composite_context *c = talloc_get_type(ctx->async.private_data,
371 struct composite_context);
372 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
373 struct pipe_tcp_state);
374 struct composite_context *sock_ipv4_req;
376 /* receive result of socket open request */
377 c->status = dcerpc_pipe_open_socket_recv(ctx);
378 if (NT_STATUS_IS_OK(c->status)) return;
380 talloc_free(s->srvaddr);
382 /* prepare server address using host:ip and transport name */
383 s->srvaddr = socket_address_from_strings(s->conn, "ipv4", s->server, s->port);
385 composite_error(c, NT_STATUS_NO_MEMORY);
389 /* try IPv4 if IPv6 fails */
390 sock_ipv4_req = dcerpc_pipe_open_socket_send(c, s->conn, s->srvaddr, NCACN_IP_TCP);
391 if (sock_ipv4_req == NULL) {
392 composite_error(c, NT_STATUS_NO_MEMORY);
396 composite_continue(c, sock_ipv4_req, continue_ipv4_open_socket, c);
401 Stage 2 of dcerpc_pipe_open_tcp_send: receive result of pipe open request
404 void continue_ipv4_open_socket(struct composite_context *ctx)
406 struct composite_context *c = talloc_get_type(ctx->async.private_data,
407 struct composite_context);
408 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
409 struct pipe_tcp_state);
411 /* receive result socket open request */
412 c->status = dcerpc_pipe_open_socket_recv(ctx);
413 if (NT_STATUS_IS_OK(c->status)) {
418 /* something went wrong... */
419 DEBUG(0, ("Failed to connect host %s on port %d - %s.\n",
420 s->server, s->port, nt_errstr(c->status)));
422 composite_error(c, c->status);
427 Send rpc pipe open request to given host:port using
430 struct composite_context* dcerpc_pipe_open_tcp_send(struct dcerpc_connection *conn,
431 const char* server, uint32_t port)
433 struct composite_context *c;
434 struct composite_context *sock_ipv6_req;
435 struct pipe_tcp_state *s;
437 /* composite context allocation and setup */
438 c = talloc_zero(conn, struct composite_context);
439 if (c == NULL) return NULL;
441 s = talloc_zero(c, struct pipe_tcp_state);
443 composite_error(c, NT_STATUS_NO_MEMORY);
447 c->state = COMPOSITE_STATE_IN_PROGRESS;
449 c->event_ctx = conn->event_ctx;
451 /* store input parameters in state structure */
452 s->server = talloc_strdup(c, server);
456 /* prepare server address using host ip:port and transport name */
457 s->srvaddr = socket_address_from_strings(s->conn, "ipv6", s->server, s->port);
459 composite_error(c, NT_STATUS_NO_MEMORY);
463 /* try IPv6 first - send socket open request */
464 sock_ipv6_req = dcerpc_pipe_open_socket_send(c, s->conn, s->srvaddr, NCACN_IP_TCP);
465 if (sock_ipv6_req == NULL) {
466 composite_error(c, NT_STATUS_NO_MEMORY);
470 composite_continue(c, sock_ipv6_req, continue_ipv6_open_socket, c);
477 Receive result of pipe open request on tcp/ip
479 NTSTATUS dcerpc_pipe_open_tcp_recv(struct composite_context *c)
482 status = composite_wait(c);
490 Open rpc pipe on tcp/ip transport - sync version
492 NTSTATUS dcerpc_pipe_open_tcp(struct dcerpc_connection *conn, const char *server,
495 struct composite_context *c;
497 c = dcerpc_pipe_open_tcp_send(conn, server, port);
498 return dcerpc_pipe_open_tcp_recv(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 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 = talloc_zero(conn, struct composite_context);
540 if (c == NULL) return NULL;
542 s = talloc_zero(c, struct pipe_unix_state);
544 composite_error(c, NT_STATUS_NO_MEMORY);
548 c->state = COMPOSITE_STATE_IN_PROGRESS;
550 c->event_ctx = conn->event_ctx;
552 /* store parameters in state structure */
553 s->path = talloc_strdup(c, path);
556 /* prepare server address using socket path and transport name */
557 s->srvaddr = socket_address_from_strings(conn, "unix", s->path, 0);
558 if (s->srvaddr == NULL) {
559 composite_error(c, NT_STATUS_NO_MEMORY);
563 /* send socket open request */
564 sock_unix_req = dcerpc_pipe_open_socket_send(c, s->conn, s->srvaddr, NCALRPC);
565 if (sock_unix_req == NULL) {
566 composite_error(c, NT_STATUS_NO_MEMORY);
570 composite_continue(c, sock_unix_req, continue_unix_open_socket, c);
578 Receive result of pipe open request on unix socket
580 NTSTATUS dcerpc_pipe_open_unix_stream_recv(struct composite_context *c)
582 NTSTATUS status = composite_wait(c);
590 Open a rpc pipe on a unix socket - sync version
592 NTSTATUS dcerpc_pipe_open_unix_stream(struct dcerpc_connection *conn, const char *path)
594 struct composite_context *c = dcerpc_pipe_open_unix_stream_send(conn, path);
595 return dcerpc_pipe_open_unix_stream_recv(c);
599 struct pipe_np_state {
601 struct socket_address *srvaddr;
602 struct dcerpc_connection *conn;
607 Stage 2 of dcerpc_pipe_open_pipe_send: receive socket open request
609 void continue_np_open_socket(struct composite_context *ctx)
611 struct composite_context *c = talloc_get_type(ctx->async.private_data,
612 struct composite_context);
614 c->status = dcerpc_pipe_open_socket_recv(ctx);
615 if (NT_STATUS_IS_OK(c->status)) {
620 composite_error(c, c->status);
625 Send pipe open request on ncalrpc
627 struct composite_context* dcerpc_pipe_open_pipe_send(struct dcerpc_connection *conn,
628 const char *identifier)
632 struct composite_context *c;
633 struct composite_context *sock_np_req;
634 struct pipe_np_state *s;
636 /* composite context allocation and setup */
637 c = talloc_zero(conn, struct composite_context);
638 if (c == NULL) return NULL;
640 s = talloc_zero(c, struct pipe_np_state);
642 composite_error(c, NT_STATUS_NO_MEMORY);
646 c->state = COMPOSITE_STATE_IN_PROGRESS;
648 c->event_ctx = conn->event_ctx;
650 /* store parameters in state structure */
651 canon = talloc_strdup(c, identifier);
654 string_replace(canon, '/', '\\');
655 s->full_path = talloc_asprintf(canon, "%s/%s", lp_ncalrpc_dir(), canon);
657 /* prepare server address using path and transport name */
658 s->srvaddr = socket_address_from_strings(conn, "unix", s->full_path, 0);
659 if (s->srvaddr == NULL) {
660 composite_error(c, NT_STATUS_NO_MEMORY);
664 /* send socket open request */
665 sock_np_req = dcerpc_pipe_open_socket_send(c, s->conn, s->srvaddr, NCALRPC);
666 if (sock_np_req == NULL) {
667 composite_error(c, NT_STATUS_NO_MEMORY);
671 composite_continue(c, sock_np_req, continue_np_open_socket, c);
680 Receive result of pipe open request on ncalrpc
682 NTSTATUS dcerpc_pipe_open_pipe_recv(struct composite_context *c)
684 NTSTATUS status = composite_wait(c);
692 Open a rpc pipe on a named pipe - sync version
694 NTSTATUS dcerpc_pipe_open_pipe(struct dcerpc_connection *conn, const char *identifier)
696 struct composite_context *c = dcerpc_pipe_open_pipe_send(conn, identifier);
697 return dcerpc_pipe_open_pipe_recv(c);