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 "librpc/rpc/dcerpc_proto.h"
31 #include "libcli/resolve/resolve.h"
32 #include "param/param.h"
34 /* transport private information used by general socket pipe transports */
37 struct socket_context *sock;
40 struct packet_context *packet;
41 uint32_t pending_reads;
48 static void sock_dead(struct dcerpc_connection *p, NTSTATUS status)
50 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
55 packet_recv_disable(sock->packet);
56 packet_set_fde(sock->packet, NULL);
57 packet_set_socket(sock->packet, NULL);
61 talloc_free(sock->fde);
66 talloc_free(sock->sock);
70 if (NT_STATUS_EQUAL(NT_STATUS_UNSUCCESSFUL, status)) {
71 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
74 if (NT_STATUS_EQUAL(NT_STATUS_OK, status)) {
75 status = NT_STATUS_END_OF_FILE;
78 if (p->transport.recv_data) {
79 p->transport.recv_data(p, NULL, status);
85 handle socket recv errors
87 static void sock_error_handler(void *private, NTSTATUS status)
89 struct dcerpc_connection *p = talloc_get_type(private,
90 struct dcerpc_connection);
95 check if a blob is a complete packet
97 static NTSTATUS sock_complete_packet(void *private, DATA_BLOB blob, size_t *size)
99 if (blob.length < DCERPC_FRAG_LEN_OFFSET+2) {
100 return STATUS_MORE_ENTRIES;
102 *size = dcerpc_get_frag_length(&blob);
103 if (*size > blob.length) {
104 return STATUS_MORE_ENTRIES;
110 process recv requests
112 static NTSTATUS sock_process_recv(void *private, DATA_BLOB blob)
114 struct dcerpc_connection *p = talloc_get_type(private,
115 struct dcerpc_connection);
116 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
117 sock->pending_reads--;
118 if (sock->pending_reads == 0) {
119 packet_recv_disable(sock->packet);
121 p->transport.recv_data(p, &blob, NT_STATUS_OK);
126 called when a IO is triggered by the events system
128 static void sock_io_handler(struct event_context *ev, struct fd_event *fde,
129 uint16_t flags, void *private)
131 struct dcerpc_connection *p = talloc_get_type(private,
132 struct dcerpc_connection);
133 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
135 if (flags & EVENT_FD_WRITE) {
136 packet_queue_run(sock->packet);
140 if (sock->sock == NULL) {
144 if (flags & EVENT_FD_READ) {
145 packet_recv(sock->packet);
150 initiate a read request - not needed for dcerpc sockets
152 static NTSTATUS sock_send_read(struct dcerpc_connection *p)
154 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
155 sock->pending_reads++;
156 if (sock->pending_reads == 1) {
157 packet_recv_enable(sock->packet);
163 send an initial pdu in a multi-pdu sequence
165 static NTSTATUS sock_send_request(struct dcerpc_connection *p, DATA_BLOB *data,
168 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
172 if (sock->sock == NULL) {
173 return NT_STATUS_CONNECTION_DISCONNECTED;
176 blob = data_blob_talloc(sock->packet, data->data, data->length);
177 if (blob.data == NULL) {
178 return NT_STATUS_NO_MEMORY;
181 status = packet_send(sock->packet, blob);
182 if (!NT_STATUS_IS_OK(status)) {
194 shutdown sock pipe connection
196 static NTSTATUS sock_shutdown_pipe(struct dcerpc_connection *p, NTSTATUS status)
198 struct sock_private *sock = (struct sock_private *)p->transport.private_data;
200 if (sock && sock->sock) {
201 sock_dead(p, status);
208 return sock server name
210 static const char *sock_peer_name(struct dcerpc_connection *p)
212 struct sock_private *sock = talloc_get_type(p->transport.private_data, struct sock_private);
213 return sock->server_name;
217 return remote name we make the actual connection (good for kerberos)
219 static const char *sock_target_hostname(struct dcerpc_connection *p)
221 struct sock_private *sock = talloc_get_type(p->transport.private_data, struct sock_private);
222 return sock->server_name;
226 struct pipe_open_socket_state {
227 struct dcerpc_connection *conn;
228 struct socket_context *socket_ctx;
229 struct sock_private *sock;
230 struct socket_address *server;
231 const char *target_hostname;
232 enum dcerpc_transport_t transport;
236 static void continue_socket_connect(struct composite_context *ctx)
238 struct dcerpc_connection *conn;
239 struct sock_private *sock;
240 struct composite_context *c = talloc_get_type(ctx->async.private_data,
241 struct composite_context);
242 struct pipe_open_socket_state *s = talloc_get_type(c->private_data,
243 struct pipe_open_socket_state);
245 /* make it easier to write a function calls */
249 c->status = socket_connect_recv(ctx);
250 if (!NT_STATUS_IS_OK(c->status)) {
251 DEBUG(0, ("Failed to connect host %s on port %d - %s\n",
252 s->server->addr, s->server->port,
253 nt_errstr(c->status)));
254 composite_error(c, c->status);
259 fill in the transport methods
261 conn->transport.transport = s->transport;
262 conn->transport.private_data = NULL;
264 conn->transport.send_request = sock_send_request;
265 conn->transport.send_read = sock_send_read;
266 conn->transport.recv_data = NULL;
268 conn->transport.shutdown_pipe = sock_shutdown_pipe;
269 conn->transport.peer_name = sock_peer_name;
270 conn->transport.target_hostname = sock_target_hostname;
272 sock->sock = s->socket_ctx;
273 sock->pending_reads = 0;
274 sock->server_name = strupper_talloc(sock, s->target_hostname);
276 sock->fde = event_add_fd(conn->event_ctx, sock->sock, socket_get_fd(sock->sock),
277 EVENT_FD_READ, sock_io_handler, conn);
279 conn->transport.private_data = sock;
281 sock->packet = packet_init(sock);
282 if (sock->packet == NULL) {
283 composite_error(c, NT_STATUS_NO_MEMORY);
288 packet_set_private(sock->packet, conn);
289 packet_set_socket(sock->packet, sock->sock);
290 packet_set_callback(sock->packet, sock_process_recv);
291 packet_set_full_request(sock->packet, sock_complete_packet);
292 packet_set_error_handler(sock->packet, sock_error_handler);
293 packet_set_event_context(sock->packet, conn->event_ctx);
294 packet_set_fde(sock->packet, sock->fde);
295 packet_set_serialise(sock->packet);
296 packet_set_initial_read(sock->packet, 16);
298 /* ensure we don't get SIGPIPE */
299 BlockSignals(true, SIGPIPE);
305 static struct composite_context *dcerpc_pipe_open_socket_send(TALLOC_CTX *mem_ctx,
306 struct dcerpc_connection *cn,
307 struct resolve_context *resolve_context,
308 struct socket_address *server,
309 const char *target_hostname,
310 enum dcerpc_transport_t transport)
312 struct composite_context *c;
313 struct pipe_open_socket_state *s;
314 struct composite_context *conn_req;
316 c = composite_create(mem_ctx, cn->event_ctx);
317 if (c == NULL) return NULL;
319 s = talloc_zero(c, struct pipe_open_socket_state);
320 if (composite_nomem(s, c)) return c;
324 s->transport = transport;
325 s->server = talloc_reference(c, server);
326 if (composite_nomem(s->server, c)) return c;
327 s->target_hostname = talloc_reference(s, target_hostname);
329 s->sock = talloc(cn, struct sock_private);
330 if (composite_nomem(s->sock, c)) return c;
332 c->status = socket_create(server->family, SOCKET_TYPE_STREAM, &s->socket_ctx, 0);
333 if (!composite_is_ok(c)) return c;
335 talloc_steal(s->sock, s->socket_ctx);
337 conn_req = socket_connect_send(s->socket_ctx, NULL, s->server, 0,
340 composite_continue(c, conn_req, continue_socket_connect, c);
345 static NTSTATUS dcerpc_pipe_open_socket_recv(struct composite_context *c)
347 NTSTATUS status = composite_wait(c);
353 struct pipe_tcp_state {
355 const char *target_hostname;
358 struct socket_address *srvaddr;
359 struct resolve_context *resolve_ctx;
360 struct dcerpc_connection *conn;
364 #if 0 /* disabled till we can resolve names to ipv6 addresses */
365 static void continue_ipv6_open_socket(struct composite_context *ctx);
367 static void continue_ipv4_open_socket(struct composite_context *ctx);
368 static void continue_ip_resolve_name(struct composite_context *ctx);
370 static void continue_ip_resolve_name(struct composite_context *ctx)
372 struct composite_context *c = talloc_get_type(ctx->async.private_data,
373 struct composite_context);
374 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
375 struct pipe_tcp_state);
376 struct composite_context *sock_ipv4_req;
378 c->status = resolve_name_recv(ctx, s, &s->address);
379 if (!composite_is_ok(c)) return;
381 /* prepare server address using host ip:port and transport name */
382 s->srvaddr = socket_address_from_strings(s->conn, "ipv4", s->address, s->port);
383 if (composite_nomem(s->srvaddr, c)) return;
385 /* resolve_nbt_name gives only ipv4 ... - send socket open request */
386 sock_ipv4_req = dcerpc_pipe_open_socket_send(c, s->conn,
388 s->srvaddr, s->target_hostname,
390 composite_continue(c, sock_ipv4_req, continue_ipv4_open_socket, c);
394 Stage 2 of dcerpc_pipe_open_tcp_send: receive result of pipe open request
395 on IPv6 and send the request on IPv4 unless IPv6 transport succeeded.
397 #if 0 /* disabled till we can resolve names to ipv6 addresses */
398 static void continue_ipv6_open_socket(struct composite_context *ctx)
400 struct composite_context *c = talloc_get_type(ctx->async.private_data,
401 struct composite_context);
402 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
403 struct pipe_tcp_state);
404 struct composite_context *sock_ipv4_req;
406 /* receive result of socket open request */
407 c->status = dcerpc_pipe_open_socket_recv(ctx);
408 if (NT_STATUS_IS_OK(c->status)) {
413 talloc_free(s->srvaddr);
415 /* prepare server address using host:ip and transport name */
416 s->srvaddr = socket_address_from_strings(s->conn, "ipv4", s->address, s->port);
417 if (composite_nomem(s->srvaddr, c)) return;
419 /* try IPv4 if IPv6 fails */
420 sock_ipv4_req = dcerpc_pipe_open_socket_send(c, s->conn,
421 s->srvaddr, s->target_hostname,
423 composite_continue(c, sock_ipv4_req, continue_ipv4_open_socket, c);
428 Stage 2 of dcerpc_pipe_open_tcp_send: receive result of pipe open request
431 static void continue_ipv4_open_socket(struct composite_context *ctx)
433 struct composite_context *c = talloc_get_type(ctx->async.private_data,
434 struct composite_context);
435 struct pipe_tcp_state *s = talloc_get_type(c->private_data,
436 struct pipe_tcp_state);
438 /* receive result socket open request */
439 c->status = dcerpc_pipe_open_socket_recv(ctx);
440 if (!NT_STATUS_IS_OK(c->status)) {
441 /* something went wrong... */
442 DEBUG(0, ("Failed to connect host %s (%s) on port %d - %s.\n",
443 s->address, s->target_hostname,
444 s->port, nt_errstr(c->status)));
446 composite_error(c, c->status);
455 Send rpc pipe open request to given host:port using
458 struct composite_context* dcerpc_pipe_open_tcp_send(struct dcerpc_connection *conn,
460 const char *target_hostname,
462 struct resolve_context *resolve_ctx)
464 struct composite_context *c;
465 struct pipe_tcp_state *s;
466 struct composite_context *resolve_req;
467 struct nbt_name name;
469 /* composite context allocation and setup */
470 c = composite_create(conn, conn->event_ctx);
471 if (c == NULL) return NULL;
473 s = talloc_zero(c, struct pipe_tcp_state);
474 if (composite_nomem(s, c)) return c;
477 /* store input parameters in state structure */
478 s->server = talloc_strdup(c, server);
479 if (composite_nomem(s->server, c)) return c;
480 if (target_hostname) {
481 s->target_hostname = talloc_strdup(c, target_hostname);
482 if (composite_nomem(s->target_hostname, c)) return c;
486 s->resolve_ctx = resolve_ctx;
488 make_nbt_name_server(&name, server);
489 resolve_req = resolve_name_send(resolve_ctx, &name, c->event_ctx);
490 composite_continue(c, resolve_req, continue_ip_resolve_name, c);
495 Receive result of pipe open request on tcp/ip
497 NTSTATUS dcerpc_pipe_open_tcp_recv(struct composite_context *c)
500 status = composite_wait(c);
507 struct pipe_unix_state {
509 struct socket_address *srvaddr;
510 struct dcerpc_connection *conn;
515 Stage 2 of dcerpc_pipe_open_unix_stream_send: receive result of pipe open
516 request on unix socket.
518 static void continue_unix_open_socket(struct composite_context *ctx)
520 struct composite_context *c = talloc_get_type(ctx->async.private_data,
521 struct composite_context);
523 c->status = dcerpc_pipe_open_socket_recv(ctx);
524 if (NT_STATUS_IS_OK(c->status)) {
529 composite_error(c, c->status);
534 Send pipe open request on unix socket
536 struct composite_context *dcerpc_pipe_open_unix_stream_send(struct dcerpc_connection *conn,
539 struct composite_context *c;
540 struct composite_context *sock_unix_req;
541 struct pipe_unix_state *s;
543 /* composite context allocation and setup */
544 c = composite_create(conn, conn->event_ctx);
545 if (c == NULL) return NULL;
547 s = talloc_zero(c, struct pipe_unix_state);
548 if (composite_nomem(s, c)) return c;
551 /* store parameters in state structure */
552 s->path = talloc_strdup(c, path);
553 if (composite_nomem(s->path, c)) return c;
556 /* prepare server address using socket path and transport name */
557 s->srvaddr = socket_address_from_strings(conn, "unix", s->path, 0);
558 if (composite_nomem(s->srvaddr, c)) return c;
560 /* send socket open request */
561 sock_unix_req = dcerpc_pipe_open_socket_send(c, s->conn,
565 composite_continue(c, sock_unix_req, continue_unix_open_socket, c);
571 Receive result of pipe open request on unix socket
573 NTSTATUS dcerpc_pipe_open_unix_stream_recv(struct composite_context *c)
575 NTSTATUS status = composite_wait(c);
582 struct pipe_np_state {
584 struct socket_address *srvaddr;
585 struct dcerpc_connection *conn;
590 Stage 2 of dcerpc_pipe_open_pipe_send: receive socket open request
592 static void continue_np_open_socket(struct composite_context *ctx)
594 struct composite_context *c = talloc_get_type(ctx->async.private_data,
595 struct composite_context);
597 c->status = dcerpc_pipe_open_socket_recv(ctx);
598 if (!composite_is_ok(c)) return;
605 Send pipe open request on ncalrpc
607 struct composite_context* dcerpc_pipe_open_pipe_send(struct dcerpc_connection *conn,
608 const char *ncalrpc_dir,
609 const char *identifier)
613 struct composite_context *c;
614 struct composite_context *sock_np_req;
615 struct pipe_np_state *s;
617 /* composite context allocation and setup */
618 c = composite_create(conn, conn->event_ctx);
619 if (c == NULL) return NULL;
621 s = talloc_zero(c, struct pipe_np_state);
622 if (composite_nomem(s, c)) return c;
625 /* store parameters in state structure */
626 canon = talloc_strdup(s, identifier);
627 if (composite_nomem(canon, c)) return c;
630 string_replace(canon, '/', '\\');
631 s->full_path = talloc_asprintf(canon, "%s/%s", ncalrpc_dir, canon);
632 if (composite_nomem(s->full_path, c)) return c;
634 /* prepare server address using path and transport name */
635 s->srvaddr = socket_address_from_strings(conn, "unix", s->full_path, 0);
636 if (composite_nomem(s->srvaddr, c)) return c;
638 /* send socket open request */
639 sock_np_req = dcerpc_pipe_open_socket_send(c, s->conn, NULL, s->srvaddr, NULL, NCALRPC);
640 composite_continue(c, sock_np_req, continue_np_open_socket, c);
646 Receive result of pipe open request on ncalrpc
648 NTSTATUS dcerpc_pipe_open_pipe_recv(struct composite_context *c)
650 NTSTATUS status = composite_wait(c);
658 Open a rpc pipe on a named pipe - sync version
660 NTSTATUS dcerpc_pipe_open_pipe(struct dcerpc_connection *conn, const char *ncalrpc_dir, const char *identifier)
662 struct composite_context *c = dcerpc_pipe_open_pipe_send(conn, ncalrpc_dir, identifier);
663 return dcerpc_pipe_open_pipe_recv(c);