2 Unix SMB/CIFS implementation.
4 dcerpc over standard sockets transport
6 Copyright (C) Andrew Tridgell 2003
7 Copyright (C) Jelmer Vernooij 2004
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include "lib/events/events.h"
26 #include "lib/socket/socket.h"
27 #include "lib/stream/packet.h"
28 #include "libcli/composite/composite.h"
30 /* transport private information used by general socket pipe transports */
33 struct socket_context *sock;
36 struct packet_context *packet;
37 uint32_t pending_reads;
44 static void sock_dead(struct dcerpc_connection *p, NTSTATUS status)
46 struct sock_private *sock = p->transport.private;
48 if (sock && sock->sock != NULL) {
49 talloc_free(sock->fde);
50 talloc_free(sock->sock);
54 if (!NT_STATUS_IS_OK(status)) {
55 p->transport.recv_data(p, NULL, status);
61 handle socket recv errors
63 static void sock_error_handler(void *private, NTSTATUS status)
65 struct dcerpc_connection *p = talloc_get_type(private,
66 struct dcerpc_connection);
71 check if a blob is a complete packet
73 static NTSTATUS sock_complete_packet(void *private, DATA_BLOB blob, size_t *size)
75 if (blob.length < DCERPC_FRAG_LEN_OFFSET+2) {
76 return STATUS_MORE_ENTRIES;
78 *size = dcerpc_get_frag_length(&blob);
79 if (*size > blob.length) {
80 return STATUS_MORE_ENTRIES;
88 static NTSTATUS sock_process_recv(void *private, DATA_BLOB blob)
90 struct dcerpc_connection *p = talloc_get_type(private,
91 struct dcerpc_connection);
92 struct sock_private *sock = p->transport.private;
93 sock->pending_reads--;
94 if (sock->pending_reads == 0) {
95 packet_recv_disable(sock->packet);
97 p->transport.recv_data(p, &blob, NT_STATUS_OK);
102 called when a IO is triggered by the events system
104 static void sock_io_handler(struct event_context *ev, struct fd_event *fde,
105 uint16_t flags, void *private)
107 struct dcerpc_connection *p = talloc_get_type(private,
108 struct dcerpc_connection);
109 struct sock_private *sock = p->transport.private;
111 if (flags & EVENT_FD_WRITE) {
112 packet_queue_run(sock->packet);
116 if (sock->sock == NULL) {
120 if (flags & EVENT_FD_READ) {
121 packet_recv(sock->packet);
126 initiate a read request - not needed for dcerpc sockets
128 static NTSTATUS sock_send_read(struct dcerpc_connection *p)
130 struct sock_private *sock = p->transport.private;
131 sock->pending_reads++;
132 if (sock->pending_reads == 1) {
133 packet_recv_enable(sock->packet);
139 send an initial pdu in a multi-pdu sequence
141 static NTSTATUS sock_send_request(struct dcerpc_connection *p, DATA_BLOB *data,
144 struct sock_private *sock = p->transport.private;
148 if (sock->sock == NULL) {
149 return NT_STATUS_CONNECTION_DISCONNECTED;
152 blob = data_blob_talloc(sock->packet, data->data, data->length);
153 if (blob.data == NULL) {
154 return NT_STATUS_NO_MEMORY;
157 status = packet_send(sock->packet, blob);
158 if (!NT_STATUS_IS_OK(status)) {
170 shutdown sock pipe connection
172 static NTSTATUS sock_shutdown_pipe(struct dcerpc_connection *p)
174 struct sock_private *sock = p->transport.private;
176 if (sock && sock->sock) {
177 sock_dead(p, NT_STATUS_OK);
184 return sock server name
186 static const char *sock_peer_name(struct dcerpc_connection *p)
188 struct sock_private *sock = p->transport.private;
189 return sock->server_name;
193 struct pipe_open_socket_state {
194 struct dcerpc_connection *conn;
195 struct socket_context *socket_ctx;
196 struct sock_private *sock;
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", s->server, s->port,
219 nt_errstr(c->status)));
220 composite_error(c, c->status);
225 fill in the transport methods
227 conn->transport.transport = s->transport;
228 conn->transport.private = NULL;
230 conn->transport.send_request = sock_send_request;
231 conn->transport.send_read = sock_send_read;
232 conn->transport.recv_data = NULL;
234 conn->transport.shutdown_pipe = sock_shutdown_pipe;
235 conn->transport.peer_name = sock_peer_name;
237 sock->sock = s->socket_ctx;
238 sock->pending_reads = 0;
239 sock->server_name = strupper_talloc(sock, s->server);
241 sock->fde = event_add_fd(conn->event_ctx, sock->sock, socket_get_fd(sock->sock),
242 0, sock_io_handler, conn);
244 conn->transport.private = sock;
246 sock->packet = packet_init(sock);
247 if (sock->packet == NULL) {
248 composite_error(c, NT_STATUS_NO_MEMORY);
253 packet_set_private(sock->packet, conn);
254 packet_set_socket(sock->packet, sock->sock);
255 packet_set_callback(sock->packet, sock_process_recv);
256 packet_set_full_request(sock->packet, sock_complete_packet);
257 packet_set_error_handler(sock->packet, sock_error_handler);
258 packet_set_event_context(sock->packet, conn->event_ctx);
259 packet_set_fde(sock->packet, sock->fde);
260 packet_set_serialise(sock->packet);
261 packet_recv_disable(sock->packet);
262 packet_set_initial_read(sock->packet, 16);
264 /* ensure we don't get SIGPIPE */
265 BlockSignals(True,SIGPIPE);
271 struct composite_context *dcerpc_pipe_open_socket_send(TALLOC_CTX *mem_ctx,
272 struct dcerpc_connection *cn,
276 enum dcerpc_transport_t transport)
279 struct composite_context *c;
280 struct pipe_open_socket_state *s;
281 struct composite_context *conn_req;
283 c = talloc_zero(mem_ctx, struct composite_context);
284 if (c == NULL) return NULL;
286 s = talloc_zero(c, struct pipe_open_socket_state);
288 composite_error(c, NT_STATUS_NO_MEMORY);
292 c->state = COMPOSITE_STATE_IN_PROGRESS;
294 c->event_ctx = cn->event_ctx;
297 s->transport = transport;
299 s->server = talloc_strdup(c, server);
300 if (s->server == NULL) {
301 composite_error(c, NT_STATUS_NO_MEMORY);
305 s->sock = talloc(cn, struct sock_private);
306 if (s->sock == NULL) {
307 composite_error(c, NT_STATUS_NO_MEMORY);
311 status = socket_create(type, SOCKET_TYPE_STREAM, &s->socket_ctx, 0);
312 if (!NT_STATUS_IS_OK(status)) {
313 composite_error(c, status);
314 talloc_free(s->sock);
317 talloc_steal(s->sock, s->socket_ctx);
319 conn_req = socket_connect_send(s->socket_ctx, NULL, 0, s->server, s->port, 0, c->event_ctx);
320 if (conn_req == NULL) {
321 composite_error(c, NT_STATUS_NO_MEMORY);
325 composite_continue(c, conn_req, continue_socket_connect, c);
332 NTSTATUS dcerpc_pipe_open_socket_recv(struct composite_context *c)
334 NTSTATUS status = composite_wait(c);
341 open a rpc connection using the generic socket library
343 NTSTATUS dcerpc_pipe_open_socket(struct dcerpc_connection *conn,
347 enum dcerpc_transport_t transport)
349 struct composite_context *c;
351 c = dcerpc_pipe_open_socket_send(conn, conn, server, port,
353 return dcerpc_pipe_open_socket_recv(c);
358 open a rpc connection using tcp
360 NTSTATUS dcerpc_pipe_open_tcp(struct dcerpc_connection *c, const char *server, uint32_t port)
365 status = dcerpc_pipe_open_socket(c, server, port, "ipv6", NCACN_IP_TCP);
366 if (NT_STATUS_IS_OK(status)) {
370 return dcerpc_pipe_open_socket(c, server, port, "ipv4", NCACN_IP_TCP);
374 open a rpc connection to a unix socket
376 NTSTATUS dcerpc_pipe_open_unix_stream(struct dcerpc_connection *c, const char *path)
378 return dcerpc_pipe_open_socket(c, path, 0, "unix", NCACN_UNIX_STREAM);
382 open a rpc connection to a named pipe
384 NTSTATUS dcerpc_pipe_open_pipe(struct dcerpc_connection *c, const char *identifier)
387 char *canon, *full_path;
389 canon = talloc_strdup(NULL, identifier);
391 string_replace(canon, '/', '\\');
392 full_path = talloc_asprintf(canon, "%s/%s", lp_ncalrpc_dir(), canon);
394 status = dcerpc_pipe_open_socket(c, full_path, 0, "unix", NCALRPC);