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9b34cee610
Found by Coverity. Signed-off-by: Andreas Schneider <asn@samba.org> Reviewed-by: Isaac Boukris <iboukris@samba.org>
1245 lines
32 KiB
C
1245 lines
32 KiB
C
/*
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Unix SMB/Netbios implementation.
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Generic infrstructure for RPC Daemons
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Copyright (C) Simo Sorce 2010
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Copyright (C) Andrew Bartlett 2011
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Copyright (C) Andreas Schneider 2011
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "librpc/rpc/dcesrv_core.h"
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#include "rpc_server/rpc_pipes.h"
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#include "rpc_server/rpc_server.h"
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#include "rpc_server/rpc_config.h"
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#include "rpc_dce.h"
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#include "librpc/gen_ndr/netlogon.h"
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#include "librpc/gen_ndr/auth.h"
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#include "lib/tsocket/tsocket.h"
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#include "libcli/named_pipe_auth/npa_tstream.h"
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#include "../auth/auth_sam_reply.h"
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#include "auth.h"
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#include "rpc_server/rpc_ncacn_np.h"
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#include "rpc_server/srv_pipe_hnd.h"
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#include "rpc_server/srv_pipe.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_RPC_SRV
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/* Creates a pipes_struct and initializes it with the information
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* sent from the client */
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int make_server_pipes_struct(TALLOC_CTX *mem_ctx,
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struct messaging_context *msg_ctx,
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const char *pipe_name,
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enum dcerpc_transport_t transport,
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const struct tsocket_address *remote_address,
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const struct tsocket_address *local_address,
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struct pipes_struct **_p,
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int *perrno)
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{
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struct pipes_struct *p;
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int ret;
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ret = make_base_pipes_struct(mem_ctx, msg_ctx, pipe_name,
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transport,
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remote_address, local_address, &p);
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if (ret) {
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*perrno = ret;
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return -1;
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}
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*_p = p;
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return 0;
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}
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/* Start listening on the appropriate unix socket and setup all is needed to
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* dispatch requests to the pipes rpc implementation */
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struct dcerpc_ncacn_listen_state {
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int fd;
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struct tevent_context *ev_ctx;
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struct messaging_context *msg_ctx;
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struct dcesrv_context *dce_ctx;
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struct dcesrv_endpoint *endpoint;
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dcerpc_ncacn_termination_fn termination_fn;
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void *termination_data;
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};
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static void dcesrv_ncacn_np_listener(struct tevent_context *ev,
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struct tevent_fd *fde,
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uint16_t flags,
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void *private_data);
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NTSTATUS dcesrv_create_ncacn_np_socket(struct dcesrv_endpoint *e, int *out_fd)
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{
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char *np_dir = NULL;
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int fd = -1;
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NTSTATUS status;
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const char *endpoint;
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char *endpoint_normalized = NULL;
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char *p = NULL;
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endpoint = dcerpc_binding_get_string_option(e->ep_description,
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"endpoint");
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if (endpoint == NULL) {
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DBG_ERR("Endpoint mandatory for named pipes\n");
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return NT_STATUS_INVALID_PARAMETER;
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}
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/* The endpoint string from IDL can be mixed uppercase and case is
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* normalized by smbd on connection */
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endpoint_normalized = strlower_talloc(talloc_tos(), endpoint);
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if (endpoint_normalized == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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/* The endpoint string from IDL can be prefixed by \pipe\ */
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p = endpoint_normalized;
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if (strncmp(p, "\\pipe\\", 6) == 0) {
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p += 6;
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}
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/*
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* As lp_ncalrpc_dir() should have 0755, but
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* lp_ncalrpc_dir()/np should have 0700, we need to
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* create lp_ncalrpc_dir() first.
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*/
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if (!directory_create_or_exist(lp_ncalrpc_dir(), 0755)) {
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status = map_nt_error_from_unix_common(errno);
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DBG_ERR("Failed to create pipe directory %s - %s\n",
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lp_ncalrpc_dir(), strerror(errno));
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goto out;
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}
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np_dir = talloc_asprintf(talloc_tos(), "%s/np", lp_ncalrpc_dir());
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if (!np_dir) {
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status = NT_STATUS_NO_MEMORY;
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DBG_ERR("Out of memory\n");
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goto out;
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}
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if (!directory_create_or_exist_strict(np_dir, geteuid(), 0700)) {
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status = map_nt_error_from_unix_common(errno);
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DBG_ERR("Failed to create pipe directory %s - %s\n",
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np_dir, strerror(errno));
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goto out;
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}
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fd = create_pipe_sock(np_dir, p, 0700);
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if (fd == -1) {
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status = map_nt_error_from_unix_common(errno);
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DBG_ERR("Failed to create ncacn_np socket! '%s/%s': %s\n",
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np_dir, p, strerror(errno));
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goto out;
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}
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DBG_DEBUG("Opened pipe socket fd %d for %s\n", fd, p);
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*out_fd = fd;
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status = NT_STATUS_OK;
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out:
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TALLOC_FREE(endpoint_normalized);
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TALLOC_FREE(np_dir);
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return status;
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}
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NTSTATUS dcesrv_setup_ncacn_np_socket(struct tevent_context *ev_ctx,
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struct messaging_context *msg_ctx,
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struct dcesrv_context *dce_ctx,
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struct dcesrv_endpoint *e,
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dcerpc_ncacn_termination_fn term_fn,
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void *term_data)
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{
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struct dcerpc_ncacn_listen_state *state;
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struct tevent_fd *fde;
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int rc;
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NTSTATUS status;
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const char *endpoint = NULL;
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endpoint = dcerpc_binding_get_string_option(e->ep_description,
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"endpoint");
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if (endpoint == NULL) {
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DBG_ERR("Endpoint mandatory for named pipes\n");
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return NT_STATUS_INVALID_PARAMETER;
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}
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/* Alloc in endpoint context. If the endpoint is freed (for example
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* when forked daemons reinit the dcesrv_context, the tevent_fd
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* listener will be stopped and the socket closed */
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state = talloc_zero(e, struct dcerpc_ncacn_listen_state);
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if (state == NULL) {
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DBG_ERR("Out of memory\n");
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return NT_STATUS_NO_MEMORY;
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}
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state->fd = -1;
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state->ev_ctx = ev_ctx;
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state->msg_ctx = msg_ctx;
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state->endpoint = e;
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state->dce_ctx = dce_ctx;
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state->termination_fn = term_fn;
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state->termination_data = term_data;
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status = dcesrv_create_ncacn_np_socket(e, &state->fd);
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if (!NT_STATUS_IS_OK(status)) {
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goto out;
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}
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rc = listen(state->fd, 5);
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if (rc < 0) {
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status = map_nt_error_from_unix_common(errno);
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DBG_ERR("Failed to listen on ncacn_np socket %s: %s\n",
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endpoint, strerror(errno));
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goto out;
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}
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DBG_DEBUG("Opened pipe socket fd %d for %s\n",
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state->fd, endpoint);
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errno = 0;
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fde = tevent_add_fd(ev_ctx,
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state, state->fd, TEVENT_FD_READ,
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dcesrv_ncacn_np_listener, state);
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if (fde == NULL) {
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if (errno == 0) {
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errno = ENOMEM;
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}
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status = map_nt_error_from_unix_common(errno);
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DBG_ERR("Failed to add event handler for ncacn_np: %s\n",
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strerror(errno));
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goto out;
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}
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tevent_fd_set_auto_close(fde);
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return NT_STATUS_OK;
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out:
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if (state->fd != -1) {
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close(state->fd);
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}
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TALLOC_FREE(state);
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return status;
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}
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static void dcesrv_ncacn_np_listener(struct tevent_context *ev,
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struct tevent_fd *fde,
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uint16_t flags,
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void *private_data)
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{
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struct dcerpc_ncacn_listen_state *state =
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talloc_get_type_abort(private_data,
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struct dcerpc_ncacn_listen_state);
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struct samba_sockaddr addr = {
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.sa_socklen = sizeof(struct sockaddr_un),
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};
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int sd = -1;
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const char *endpoint = NULL;
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/* TODO: should we have a limit to the number of clients ? */
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sd = accept(state->fd, &addr.u.sa, &addr.sa_socklen);
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if (sd == -1) {
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if (errno != EINTR) {
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DEBUG(6, ("Failed to get a valid socket [%s]\n",
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strerror(errno)));
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}
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return;
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}
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smb_set_close_on_exec(sd);
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endpoint = dcerpc_binding_get_string_option(
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state->endpoint->ep_description, "endpoint");
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if (endpoint == NULL) {
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DBG_ERR("Failed to get endpoint from binding description\n");
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close(sd);
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return;
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}
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DBG_DEBUG("Accepted ncacn_np socket %s (fd: %d)\n",
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addr.u.un.sun_path, sd);
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dcerpc_ncacn_accept(state->ev_ctx,
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state->msg_ctx,
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state->dce_ctx,
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state->endpoint,
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NULL, /* remote client address */
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NULL, /* local server address */
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sd,
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state->termination_fn,
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state->termination_data);
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}
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/********************************************************************
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* Start listening on the tcp/ip socket
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********************************************************************/
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static void dcesrv_ncacn_ip_tcp_listener(struct tevent_context *ev,
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struct tevent_fd *fde,
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uint16_t flags,
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void *private_data);
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NTSTATUS dcesrv_create_ncacn_ip_tcp_socket(const struct sockaddr_storage *ifss,
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uint16_t *port,
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int *out_fd)
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{
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int fd = -1;
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if (*port == 0) {
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uint16_t i;
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for (i = lp_rpc_low_port(); i <= lp_rpc_high_port(); i++) {
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fd = open_socket_in(SOCK_STREAM,
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i,
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0,
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ifss,
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false);
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if (fd >= 0) {
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*port = i;
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break;
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}
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}
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} else {
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fd = open_socket_in(SOCK_STREAM,
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*port,
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0,
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ifss,
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true);
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}
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if (fd == -1) {
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DBG_ERR("Failed to create socket on port %u!\n", *port);
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return NT_STATUS_UNSUCCESSFUL;
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}
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DBG_DEBUG("Opened ncacn_ip_tcp socket fd %d for port %u\n", fd, *port);
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*out_fd = fd;
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return NT_STATUS_OK;
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}
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NTSTATUS dcesrv_setup_ncacn_ip_tcp_socket(struct tevent_context *ev_ctx,
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struct messaging_context *msg_ctx,
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struct dcesrv_context *dce_ctx,
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struct dcesrv_endpoint *e,
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const struct sockaddr_storage *ifss,
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dcerpc_ncacn_termination_fn term_fn,
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void *term_data)
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{
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struct dcerpc_ncacn_listen_state *state = NULL;
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struct tevent_fd *fde = NULL;
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const char *endpoint = NULL;
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uint16_t port = 0;
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char port_str[6];
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int rc;
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NTSTATUS status;
|
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|
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endpoint = dcerpc_binding_get_string_option(e->ep_description,
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"endpoint");
|
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if (endpoint != NULL) {
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port = atoi(endpoint);
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}
|
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|
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/* Alloc in endpoint context. If the endpoint is freed (for example
|
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* when forked daemons reinit the dcesrv_context, the tevent_fd
|
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* listener will be stopped and the socket closed */
|
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state = talloc_zero(e, struct dcerpc_ncacn_listen_state);
|
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if (state == NULL) {
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DBG_ERR("Out of memory\n");
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return NT_STATUS_NO_MEMORY;
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}
|
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|
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state->fd = -1;
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state->ev_ctx = ev_ctx;
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state->msg_ctx = msg_ctx;
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state->endpoint = e;
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state->dce_ctx = dce_ctx;
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state->termination_fn = term_fn;
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state->termination_data = term_data;
|
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|
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status = dcesrv_create_ncacn_ip_tcp_socket(ifss, &port, &state->fd);
|
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if (!NT_STATUS_IS_OK(status)) {
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goto out;
|
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}
|
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|
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/* ready to listen */
|
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set_socket_options(state->fd, "SO_KEEPALIVE");
|
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set_socket_options(state->fd, lp_socket_options());
|
|
|
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/* Set server socket to non-blocking for the accept. */
|
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rc = set_blocking(state->fd, false);
|
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if (rc < 0) {
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status = map_nt_error_from_unix_common(errno);
|
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goto out;
|
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}
|
|
|
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rc = listen(state->fd, SMBD_LISTEN_BACKLOG);
|
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if (rc == -1) {
|
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status = map_nt_error_from_unix_common(errno);
|
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DBG_ERR("Failed to listen on ncacn_ip_tcp socket: %s\n",
|
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strerror(errno));
|
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goto out;
|
|
}
|
|
|
|
DBG_DEBUG("Opened socket fd %d for port %u\n",
|
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state->fd, port);
|
|
|
|
errno = 0;
|
|
fde = tevent_add_fd(state->ev_ctx,
|
|
state,
|
|
state->fd,
|
|
TEVENT_FD_READ,
|
|
dcesrv_ncacn_ip_tcp_listener,
|
|
state);
|
|
if (fde == NULL) {
|
|
if (errno == 0) {
|
|
errno = ENOMEM;
|
|
}
|
|
status = map_nt_error_from_unix_common(errno);
|
|
DBG_ERR("Failed to add event handler for ncacn_ip_tcp: %s\n",
|
|
strerror(errno));
|
|
goto out;
|
|
}
|
|
|
|
tevent_fd_set_auto_close(fde);
|
|
|
|
/* Set the port in the endpoint */
|
|
snprintf(port_str, sizeof(port_str), "%u", port);
|
|
|
|
status = dcerpc_binding_set_string_option(e->ep_description,
|
|
"endpoint", port_str);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DBG_ERR("Failed to set binding endpoint '%s': %s\n",
|
|
port_str, nt_errstr(status));
|
|
goto out;
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
|
|
out:
|
|
if (state->fd != -1) {
|
|
close(state->fd);
|
|
}
|
|
TALLOC_FREE(state);
|
|
|
|
return status;
|
|
}
|
|
|
|
static void dcesrv_ncacn_ip_tcp_listener(struct tevent_context *ev,
|
|
struct tevent_fd *fde,
|
|
uint16_t flags,
|
|
void *private_data)
|
|
{
|
|
struct dcerpc_ncacn_listen_state *state =
|
|
talloc_get_type_abort(private_data,
|
|
struct dcerpc_ncacn_listen_state);
|
|
struct tsocket_address *cli_addr = NULL;
|
|
struct tsocket_address *srv_addr = NULL;
|
|
struct samba_sockaddr addr = {
|
|
.sa_socklen = sizeof(struct sockaddr_storage),
|
|
};
|
|
int s = -1;
|
|
int rc;
|
|
|
|
s = accept(state->fd, &addr.u.sa, &addr.sa_socklen);
|
|
if (s == -1) {
|
|
if (errno != EINTR) {
|
|
DBG_ERR("Failed to accept: %s\n", strerror(errno));
|
|
}
|
|
return;
|
|
}
|
|
smb_set_close_on_exec(s);
|
|
|
|
rc = tsocket_address_bsd_from_samba_sockaddr(state, &addr, &cli_addr);
|
|
if (rc < 0) {
|
|
close(s);
|
|
return;
|
|
}
|
|
|
|
rc = getsockname(s, &addr.u.sa, &addr.sa_socklen);
|
|
if (rc < 0) {
|
|
close(s);
|
|
return;
|
|
}
|
|
|
|
rc = tsocket_address_bsd_from_samba_sockaddr(state, &addr, &srv_addr);
|
|
if (rc < 0) {
|
|
close(s);
|
|
return;
|
|
}
|
|
|
|
DBG_DEBUG("Accepted ncacn_ip_tcp socket %d\n", s);
|
|
|
|
dcerpc_ncacn_accept(state->ev_ctx,
|
|
state->msg_ctx,
|
|
state->dce_ctx,
|
|
state->endpoint,
|
|
cli_addr,
|
|
srv_addr,
|
|
s,
|
|
state->termination_fn,
|
|
state->termination_data);
|
|
}
|
|
|
|
/********************************************************************
|
|
* Start listening on the ncalrpc socket
|
|
********************************************************************/
|
|
|
|
static void dcesrv_ncalrpc_listener(struct tevent_context *ev,
|
|
struct tevent_fd *fde,
|
|
uint16_t flags,
|
|
void *private_data);
|
|
|
|
NTSTATUS dcesrv_create_ncalrpc_socket(struct dcesrv_endpoint *e, int *out_fd)
|
|
{
|
|
int fd = -1;
|
|
const char *endpoint = NULL;
|
|
NTSTATUS status;
|
|
|
|
endpoint = dcerpc_binding_get_string_option(e->ep_description,
|
|
"endpoint");
|
|
if (endpoint == NULL) {
|
|
/*
|
|
* No identifier specified: use DEFAULT or SMBD.
|
|
*
|
|
* When role is AD DC we run two rpc server instances, the one
|
|
* started by 'samba' and the one embedded in 'smbd'.
|
|
* Avoid listening in DEFAULT socket for NCALRPC as both
|
|
* servers will race to accept connections. In this case smbd
|
|
* will listen in SMBD socket and rpcint binding handle
|
|
* implementation will pick the right socket to use.
|
|
*
|
|
* TODO: DO NOT hardcode this value anywhere else. Rather,
|
|
* specify no endpoint and let the epmapper worry about it.
|
|
*/
|
|
if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC) {
|
|
endpoint = "SMBD";
|
|
} else {
|
|
endpoint = "DEFAULT";
|
|
}
|
|
status = dcerpc_binding_set_string_option(e->ep_description,
|
|
"endpoint",
|
|
endpoint);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DBG_ERR("Failed to set ncalrpc 'endpoint' binding "
|
|
"string option to '%s': %s\n",
|
|
endpoint, nt_errstr(status));
|
|
return status;
|
|
}
|
|
}
|
|
|
|
if (!directory_create_or_exist(lp_ncalrpc_dir(), 0755)) {
|
|
status = map_nt_error_from_unix_common(errno);
|
|
DBG_ERR("Failed to create ncalrpc directory '%s': %s\n",
|
|
lp_ncalrpc_dir(), strerror(errno));
|
|
goto out;
|
|
}
|
|
|
|
fd = create_pipe_sock(lp_ncalrpc_dir(), endpoint, 0755);
|
|
if (fd == -1) {
|
|
status = map_nt_error_from_unix_common(errno);
|
|
DBG_ERR("Failed to create ncalrpc socket '%s/%s': %s\n",
|
|
lp_ncalrpc_dir(), endpoint, strerror(errno));
|
|
goto out;
|
|
}
|
|
|
|
DBG_DEBUG("Opened ncalrpc socket fd '%d' for '%s/%s'\n",
|
|
fd, lp_ncalrpc_dir(), endpoint);
|
|
|
|
*out_fd = fd;
|
|
|
|
return NT_STATUS_OK;
|
|
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
NTSTATUS dcesrv_setup_ncalrpc_socket(struct tevent_context *ev_ctx,
|
|
struct messaging_context *msg_ctx,
|
|
struct dcesrv_context *dce_ctx,
|
|
struct dcesrv_endpoint *e,
|
|
dcerpc_ncacn_termination_fn term_fn,
|
|
void *termination_data)
|
|
{
|
|
struct dcerpc_ncacn_listen_state *state;
|
|
struct tevent_fd *fde;
|
|
int rc;
|
|
NTSTATUS status;
|
|
|
|
/* Alloc in endpoint context. If the endpoint is freed (for example
|
|
* when forked daemons reinit the dcesrv_context, the tevent_fd
|
|
* listener will be stopped and the socket closed */
|
|
state = talloc_zero(e, struct dcerpc_ncacn_listen_state);
|
|
if (state == NULL) {
|
|
DBG_ERR("Out of memory\n");
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
state->fd = -1;
|
|
state->ev_ctx = ev_ctx;
|
|
state->msg_ctx = msg_ctx;
|
|
state->dce_ctx = dce_ctx;
|
|
state->endpoint = e;
|
|
state->termination_fn = term_fn;
|
|
state->termination_data = termination_data;
|
|
|
|
status = dcesrv_create_ncalrpc_socket(e, &state->fd);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DBG_ERR("Failed to create ncalrpc socket: %s\n",
|
|
nt_errstr(status));
|
|
goto out;
|
|
}
|
|
|
|
rc = listen(state->fd, 5);
|
|
if (rc < 0) {
|
|
const char *endpoint = dcerpc_binding_get_string_option(
|
|
e->ep_description, "endpoint");
|
|
status = map_nt_error_from_unix_common(errno);
|
|
DBG_ERR("Failed to listen on ncalrpc socket %s: %s\n",
|
|
endpoint, strerror(errno));
|
|
goto out;
|
|
}
|
|
|
|
/* Set server socket to non-blocking for the accept. */
|
|
rc = set_blocking(state->fd, false);
|
|
if (rc < 0) {
|
|
status = map_nt_error_from_unix_common(errno);
|
|
goto out;
|
|
}
|
|
|
|
errno = 0;
|
|
fde = tevent_add_fd(state->ev_ctx,
|
|
state,
|
|
state->fd,
|
|
TEVENT_FD_READ,
|
|
dcesrv_ncalrpc_listener,
|
|
state);
|
|
if (fde == NULL) {
|
|
if (errno == 0) {
|
|
errno = ENOMEM;
|
|
}
|
|
status = map_nt_error_from_unix_common(errno);
|
|
DBG_ERR("Failed to add event handler for ncalrpc: %s\n",
|
|
strerror(errno));
|
|
goto out;
|
|
}
|
|
|
|
tevent_fd_set_auto_close(fde);
|
|
|
|
return NT_STATUS_OK;
|
|
out:
|
|
if (state->fd != -1) {
|
|
close(state->fd);
|
|
}
|
|
TALLOC_FREE(state);
|
|
|
|
return status;
|
|
}
|
|
|
|
static void dcesrv_ncalrpc_listener(struct tevent_context *ev,
|
|
struct tevent_fd *fde,
|
|
uint16_t flags,
|
|
void *private_data)
|
|
{
|
|
struct dcerpc_ncacn_listen_state *state =
|
|
talloc_get_type_abort(private_data,
|
|
struct dcerpc_ncacn_listen_state);
|
|
struct tsocket_address *cli_addr = NULL, *srv_addr = NULL;
|
|
struct samba_sockaddr addr = {
|
|
.sa_socklen = sizeof(struct sockaddr_un),
|
|
};
|
|
struct samba_sockaddr addr_server = {
|
|
.sa_socklen = sizeof(struct sockaddr_un),
|
|
};
|
|
int sd = -1;
|
|
int rc;
|
|
const char *endpoint = NULL;
|
|
|
|
sd = accept(state->fd, &addr.u.sa, &addr.sa_socklen);
|
|
if (sd == -1) {
|
|
if (errno != EINTR) {
|
|
DBG_ERR("Failed to accept: %s\n", strerror(errno));
|
|
}
|
|
return;
|
|
}
|
|
smb_set_close_on_exec(sd);
|
|
|
|
rc = tsocket_address_bsd_from_samba_sockaddr(state, &addr, &cli_addr);
|
|
if (rc < 0) {
|
|
close(sd);
|
|
return;
|
|
}
|
|
|
|
rc = getsockname(sd, &addr_server.u.sa, &addr_server.sa_socklen);
|
|
if (rc < 0) {
|
|
close(sd);
|
|
return;
|
|
}
|
|
|
|
rc = tsocket_address_bsd_from_samba_sockaddr(state,
|
|
&addr_server,
|
|
&srv_addr);
|
|
if (rc < 0) {
|
|
close(sd);
|
|
return;
|
|
}
|
|
|
|
endpoint = dcerpc_binding_get_string_option(
|
|
state->endpoint->ep_description, "endpoint");
|
|
if (endpoint == NULL) {
|
|
DBG_ERR("Failed to get endpoint from binding description\n");
|
|
close(sd);
|
|
return;
|
|
}
|
|
|
|
DBG_DEBUG("Accepted ncalrpc socket %s (fd: %d)\n",
|
|
addr.u.un.sun_path, sd);
|
|
|
|
dcerpc_ncacn_accept(state->ev_ctx,
|
|
state->msg_ctx,
|
|
state->dce_ctx,
|
|
state->endpoint,
|
|
cli_addr, srv_addr, sd,
|
|
state->termination_fn,
|
|
state->termination_data);
|
|
}
|
|
|
|
static int dcesrv_connection_destructor(struct dcesrv_connection *conn)
|
|
{
|
|
struct dcerpc_ncacn_conn *ncacn_conn = talloc_get_type_abort(
|
|
conn->transport.private_data,
|
|
struct dcerpc_ncacn_conn);
|
|
|
|
if (ncacn_conn->termination_fn != NULL) {
|
|
ncacn_conn->termination_fn(conn, ncacn_conn->termination_data);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
NTSTATUS dcerpc_ncacn_conn_init(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev_ctx,
|
|
struct messaging_context *msg_ctx,
|
|
struct dcesrv_context *dce_ctx,
|
|
struct dcesrv_endpoint *endpoint,
|
|
dcerpc_ncacn_termination_fn term_fn,
|
|
void *termination_data,
|
|
struct dcerpc_ncacn_conn **out)
|
|
{
|
|
struct dcerpc_ncacn_conn *ncacn_conn = NULL;
|
|
|
|
ncacn_conn = talloc_zero(mem_ctx, struct dcerpc_ncacn_conn);
|
|
if (ncacn_conn == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
ncacn_conn->ev_ctx = ev_ctx;
|
|
ncacn_conn->msg_ctx = msg_ctx;
|
|
ncacn_conn->dce_ctx = dce_ctx;
|
|
ncacn_conn->endpoint = endpoint;
|
|
ncacn_conn->sock = -1;
|
|
ncacn_conn->termination_fn = term_fn;
|
|
ncacn_conn->termination_data = termination_data;
|
|
|
|
*out = ncacn_conn;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
static void dcesrv_ncacn_np_accept_done(struct tevent_req *subreq);
|
|
static void dcesrv_ncacn_accept_step2(struct dcerpc_ncacn_conn *ncacn_conn);
|
|
|
|
static void ncacn_terminate_connection(struct dcerpc_ncacn_conn *conn,
|
|
const char *reason);
|
|
|
|
void dcerpc_ncacn_accept(struct tevent_context *ev_ctx,
|
|
struct messaging_context *msg_ctx,
|
|
struct dcesrv_context *dce_ctx,
|
|
struct dcesrv_endpoint *e,
|
|
struct tsocket_address *cli_addr,
|
|
struct tsocket_address *srv_addr,
|
|
int s,
|
|
dcerpc_ncacn_termination_fn termination_fn,
|
|
void *termination_data)
|
|
{
|
|
enum dcerpc_transport_t transport =
|
|
dcerpc_binding_get_transport(e->ep_description);
|
|
struct dcerpc_ncacn_conn *ncacn_conn;
|
|
NTSTATUS status;
|
|
int rc;
|
|
|
|
DBG_DEBUG("dcerpc_ncacn_accept\n");
|
|
|
|
status = dcerpc_ncacn_conn_init(ev_ctx,
|
|
ev_ctx,
|
|
msg_ctx,
|
|
dce_ctx,
|
|
e,
|
|
termination_fn,
|
|
termination_data,
|
|
&ncacn_conn);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DBG_ERR("Failed to initialize dcerpc_ncacn_connection: %s\n",
|
|
nt_errstr(status));
|
|
close(s);
|
|
return;
|
|
}
|
|
|
|
ncacn_conn->sock = s;
|
|
|
|
if (cli_addr != NULL) {
|
|
ncacn_conn->remote_client_addr = talloc_move(ncacn_conn, &cli_addr);
|
|
|
|
if (tsocket_address_is_inet(ncacn_conn->remote_client_addr, "ip")) {
|
|
ncacn_conn->remote_client_name =
|
|
tsocket_address_inet_addr_string(ncacn_conn->remote_client_addr,
|
|
ncacn_conn);
|
|
} else {
|
|
ncacn_conn->remote_client_name =
|
|
tsocket_address_unix_path(ncacn_conn->remote_client_addr,
|
|
ncacn_conn);
|
|
}
|
|
|
|
if (ncacn_conn->remote_client_name == NULL) {
|
|
DBG_ERR("Out of memory obtaining remote socket address as a string!\n");
|
|
ncacn_terminate_connection(ncacn_conn, "No memory");
|
|
close(s);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (srv_addr != NULL) {
|
|
ncacn_conn->local_server_addr = talloc_move(ncacn_conn, &srv_addr);
|
|
|
|
if (tsocket_address_is_inet(ncacn_conn->local_server_addr, "ip")) {
|
|
ncacn_conn->local_server_name =
|
|
tsocket_address_inet_addr_string(ncacn_conn->local_server_addr,
|
|
ncacn_conn);
|
|
} else {
|
|
ncacn_conn->local_server_name =
|
|
tsocket_address_unix_path(ncacn_conn->local_server_addr,
|
|
ncacn_conn);
|
|
}
|
|
if (ncacn_conn->local_server_name == NULL) {
|
|
DBG_ERR("No memory\n");
|
|
ncacn_terminate_connection(ncacn_conn, "No memory");
|
|
close(s);
|
|
return;
|
|
}
|
|
}
|
|
|
|
rc = set_blocking(s, false);
|
|
if (rc < 0) {
|
|
DBG_WARNING("Failed to set dcerpc socket to non-blocking\n");
|
|
ncacn_terminate_connection(ncacn_conn, strerror(errno));
|
|
close(s);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* As soon as we have tstream_bsd_existing_socket set up it will
|
|
* take care of closing the socket.
|
|
*/
|
|
rc = tstream_bsd_existing_socket(ncacn_conn, s, &ncacn_conn->tstream);
|
|
if (rc < 0) {
|
|
DBG_WARNING("Failed to create tstream socket for dcerpc\n");
|
|
ncacn_terminate_connection(ncacn_conn, "No memory");
|
|
close(s);
|
|
return;
|
|
}
|
|
|
|
if (transport == NCACN_NP) {
|
|
struct tevent_req *subreq = NULL;
|
|
uint64_t allocation_size = 4096;
|
|
uint16_t device_state = 0xff | 0x0400 | 0x0100;
|
|
uint16_t file_type = FILE_TYPE_MESSAGE_MODE_PIPE;
|
|
|
|
subreq = tstream_npa_accept_existing_send(ncacn_conn,
|
|
ncacn_conn->ev_ctx,
|
|
ncacn_conn->tstream,
|
|
file_type,
|
|
device_state,
|
|
allocation_size);
|
|
if (subreq == NULL) {
|
|
ncacn_terminate_connection(ncacn_conn, "No memory");
|
|
return;
|
|
}
|
|
tevent_req_set_callback(subreq, dcesrv_ncacn_np_accept_done,
|
|
ncacn_conn);
|
|
return;
|
|
}
|
|
|
|
dcesrv_ncacn_accept_step2(ncacn_conn);
|
|
}
|
|
|
|
static void dcesrv_ncacn_np_accept_done(struct tevent_req *subreq)
|
|
{
|
|
struct auth_session_info_transport *session_info_transport = NULL;
|
|
struct dcerpc_ncacn_conn *ncacn_conn = NULL;
|
|
int error;
|
|
int ret;
|
|
|
|
ncacn_conn = tevent_req_callback_data(subreq,
|
|
struct dcerpc_ncacn_conn);
|
|
|
|
ret = tstream_npa_accept_existing_recv(subreq, &error, ncacn_conn,
|
|
&ncacn_conn->tstream,
|
|
&ncacn_conn->remote_client_addr,
|
|
&ncacn_conn->remote_client_name,
|
|
&ncacn_conn->local_server_addr,
|
|
&ncacn_conn->local_server_name,
|
|
&session_info_transport);
|
|
ncacn_conn->session_info = talloc_move(ncacn_conn,
|
|
&session_info_transport->session_info);
|
|
|
|
TALLOC_FREE(subreq);
|
|
if (ret != 0) {
|
|
DBG_ERR("Failed to accept named pipe connection: %s\n",
|
|
strerror(error));
|
|
ncacn_terminate_connection(ncacn_conn, strerror(errno));
|
|
return;
|
|
}
|
|
|
|
dcesrv_ncacn_accept_step2(ncacn_conn);
|
|
}
|
|
|
|
static void dcesrv_ncacn_accept_step2(struct dcerpc_ncacn_conn *ncacn_conn)
|
|
{
|
|
char *pipe_name = NULL;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
int rc;
|
|
int sys_errno;
|
|
enum dcerpc_transport_t transport = dcerpc_binding_get_transport(
|
|
ncacn_conn->endpoint->ep_description);
|
|
const char *endpoint = dcerpc_binding_get_string_option(
|
|
ncacn_conn->endpoint->ep_description, "endpoint");
|
|
struct dcesrv_connection *dcesrv_conn = NULL;
|
|
NTSTATUS status;
|
|
|
|
switch (transport) {
|
|
case NCACN_IP_TCP:
|
|
pipe_name = tsocket_address_string(ncacn_conn->remote_client_addr,
|
|
ncacn_conn);
|
|
if (pipe_name == NULL) {
|
|
DBG_ERR("No memory\n");
|
|
ncacn_terminate_connection(ncacn_conn, "No memory");
|
|
return;
|
|
}
|
|
|
|
break;
|
|
case NCALRPC:
|
|
rc = getpeereid(ncacn_conn->sock, &uid, &gid);
|
|
if (rc < 0) {
|
|
DEBUG(2, ("Failed to get ncalrpc connecting "
|
|
"uid - %s!\n", strerror(errno)));
|
|
} else {
|
|
if (uid == sec_initial_uid()) {
|
|
TALLOC_FREE(ncacn_conn->remote_client_addr);
|
|
|
|
rc = tsocket_address_unix_from_path(ncacn_conn,
|
|
AS_SYSTEM_MAGIC_PATH_TOKEN,
|
|
&ncacn_conn->remote_client_addr);
|
|
if (rc < 0) {
|
|
DBG_ERR("No memory\n");
|
|
ncacn_terminate_connection(ncacn_conn, "No memory");
|
|
return;
|
|
}
|
|
|
|
TALLOC_FREE(ncacn_conn->remote_client_name);
|
|
ncacn_conn->remote_client_name
|
|
= tsocket_address_unix_path(ncacn_conn->remote_client_addr,
|
|
ncacn_conn);
|
|
if (ncacn_conn->remote_client_name == NULL) {
|
|
DBG_ERR("No memory\n");
|
|
ncacn_terminate_connection(ncacn_conn, "No memory");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
FALL_THROUGH;
|
|
case NCACN_NP:
|
|
pipe_name = talloc_strdup(ncacn_conn, endpoint);
|
|
if (pipe_name == NULL) {
|
|
DBG_ERR("No memory\n");
|
|
ncacn_terminate_connection(ncacn_conn, "No memory");
|
|
return;
|
|
}
|
|
break;
|
|
default:
|
|
DBG_ERR("unknown dcerpc transport: %u!\n", transport);
|
|
ncacn_terminate_connection(ncacn_conn,
|
|
"Unknown DCE/RPC transport");
|
|
return;
|
|
}
|
|
|
|
if (ncacn_conn->session_info == NULL) {
|
|
status = make_session_info_anonymous(ncacn_conn,
|
|
&ncacn_conn->session_info);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DBG_ERR("Failed to create anonymous session info: "
|
|
"%s\n", nt_errstr(status));
|
|
ncacn_terminate_connection(ncacn_conn,
|
|
nt_errstr(status));
|
|
return;
|
|
}
|
|
}
|
|
|
|
rc = make_server_pipes_struct(ncacn_conn,
|
|
ncacn_conn->msg_ctx,
|
|
pipe_name,
|
|
transport,
|
|
ncacn_conn->remote_client_addr,
|
|
ncacn_conn->local_server_addr,
|
|
&ncacn_conn->p,
|
|
&sys_errno);
|
|
if (rc < 0) {
|
|
DBG_ERR("Failed to create pipe struct: %s",
|
|
strerror(sys_errno));
|
|
ncacn_terminate_connection(ncacn_conn, strerror(sys_errno));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* This fills in dcesrv_conn->endpoint with the endpoint
|
|
* associated with the socket. From this point on we know
|
|
* which (group of) services we are handling, but not the
|
|
* specific interface.
|
|
*/
|
|
status = dcesrv_endpoint_connect(ncacn_conn->dce_ctx,
|
|
ncacn_conn,
|
|
ncacn_conn->endpoint,
|
|
ncacn_conn->session_info,
|
|
ncacn_conn->ev_ctx,
|
|
DCESRV_CALL_STATE_FLAG_MAY_ASYNC,
|
|
&dcesrv_conn);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DBG_ERR("Failed to connect to endpoint: %s\n",
|
|
nt_errstr(status));
|
|
ncacn_terminate_connection(ncacn_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
talloc_set_destructor(dcesrv_conn, dcesrv_connection_destructor);
|
|
|
|
dcesrv_conn->transport.private_data = ncacn_conn;
|
|
dcesrv_conn->transport.report_output_data =
|
|
dcesrv_sock_report_output_data;
|
|
dcesrv_conn->transport.terminate_connection =
|
|
dcesrv_transport_terminate_connection;
|
|
dcesrv_conn->send_queue = tevent_queue_create(dcesrv_conn,
|
|
"dcesrv send queue");
|
|
if (dcesrv_conn->send_queue == NULL) {
|
|
status = NT_STATUS_NO_MEMORY;
|
|
DBG_ERR("Failed to create send queue: %s\n",
|
|
nt_errstr(status));
|
|
ncacn_terminate_connection(ncacn_conn, nt_errstr(status));
|
|
return;
|
|
}
|
|
|
|
dcesrv_conn->stream = talloc_move(dcesrv_conn, &ncacn_conn->tstream);
|
|
dcesrv_conn->local_address = ncacn_conn->local_server_addr;
|
|
dcesrv_conn->remote_address = ncacn_conn->remote_client_addr;
|
|
status = dcesrv_connection_loop_start(dcesrv_conn);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DBG_ERR("Failed to start dcesrv_connection loop: %s\n",
|
|
nt_errstr(status));
|
|
ncacn_terminate_connection(ncacn_conn, nt_errstr(status));
|
|
}
|
|
DBG_DEBUG("dcerpc_ncacn_accept done\n");
|
|
|
|
return;
|
|
}
|
|
|
|
NTSTATUS dcesrv_auth_gensec_prepare(TALLOC_CTX *mem_ctx,
|
|
struct dcesrv_call_state *call,
|
|
struct gensec_security **out)
|
|
{
|
|
struct gensec_security *gensec = NULL;
|
|
NTSTATUS status;
|
|
|
|
if (out == NULL) {
|
|
return NT_STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
status = auth_generic_prepare(mem_ctx,
|
|
call->conn->remote_address,
|
|
call->conn->local_address,
|
|
"DCE/RPC",
|
|
&gensec);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DBG_ERR("Failed to prepare gensec: %s\n", nt_errstr(status));
|
|
return status;
|
|
}
|
|
|
|
*out = gensec;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
void dcesrv_log_successful_authz(struct dcesrv_call_state *call)
|
|
{
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
struct auth4_context *auth4_context = NULL;
|
|
struct dcesrv_auth *auth = call->auth_state;
|
|
enum dcerpc_transport_t transport = dcerpc_binding_get_transport(
|
|
call->conn->endpoint->ep_description);
|
|
const char *auth_type = derpc_transport_string_by_transport(transport);
|
|
const char *transport_protection = AUTHZ_TRANSPORT_PROTECTION_NONE;
|
|
NTSTATUS status;
|
|
|
|
if (frame == NULL) {
|
|
DBG_ERR("No memory");
|
|
return;
|
|
}
|
|
|
|
if (transport == NCACN_NP) {
|
|
transport_protection = AUTHZ_TRANSPORT_PROTECTION_SMB;
|
|
}
|
|
|
|
become_root();
|
|
status = make_auth4_context(frame, &auth4_context);
|
|
unbecome_root();
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DBG_ERR("Unable to make auth context for authz log.\n");
|
|
TALLOC_FREE(frame);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Log the authorization to this RPC interface. This
|
|
* covered ncacn_np pass-through auth, and anonymous
|
|
* DCE/RPC (eg epmapper, netlogon etc)
|
|
*/
|
|
log_successful_authz_event(auth4_context->msg_ctx,
|
|
auth4_context->lp_ctx,
|
|
call->conn->remote_address,
|
|
call->conn->local_address,
|
|
"DCE/RPC",
|
|
auth_type,
|
|
transport_protection,
|
|
auth->session_info);
|
|
|
|
auth->auth_audited = true;
|
|
|
|
TALLOC_FREE(frame);
|
|
}
|
|
|
|
static NTSTATUS dcesrv_assoc_group_new(struct dcesrv_call_state *call,
|
|
uint32_t assoc_group_id)
|
|
{
|
|
struct dcesrv_connection *conn = call->conn;
|
|
struct dcesrv_context *dce_ctx = conn->dce_ctx;
|
|
const struct dcesrv_endpoint *endpoint = conn->endpoint;
|
|
enum dcerpc_transport_t transport =
|
|
dcerpc_binding_get_transport(endpoint->ep_description);
|
|
struct dcesrv_assoc_group *assoc_group = NULL;
|
|
|
|
assoc_group = talloc_zero(conn, struct dcesrv_assoc_group);
|
|
if (assoc_group == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
assoc_group->transport = transport;
|
|
assoc_group->id = assoc_group_id;
|
|
assoc_group->dce_ctx = dce_ctx;
|
|
|
|
call->conn->assoc_group = assoc_group;
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS dcesrv_assoc_group_find(struct dcesrv_call_state *call)
|
|
{
|
|
uint32_t assoc_group_id = call->pkt.u.bind.assoc_group_id;
|
|
|
|
/* If not requested by client create a new association group */
|
|
if (assoc_group_id == 0) {
|
|
assoc_group_id = 0x53F0;
|
|
}
|
|
|
|
return dcesrv_assoc_group_new(call, assoc_group_id);
|
|
}
|
|
|
|
void dcesrv_transport_terminate_connection(struct dcesrv_connection *dce_conn,
|
|
const char *reason)
|
|
{
|
|
struct dcerpc_ncacn_conn *ncacn_conn = talloc_get_type_abort(
|
|
dce_conn->transport.private_data,
|
|
struct dcerpc_ncacn_conn);
|
|
|
|
ncacn_terminate_connection(ncacn_conn, reason);
|
|
}
|
|
|
|
static void ncacn_terminate_connection(struct dcerpc_ncacn_conn *conn,
|
|
const char *reason)
|
|
{
|
|
if (reason == NULL) {
|
|
reason = "Unknown reason";
|
|
}
|
|
|
|
DBG_NOTICE("Terminating connection - '%s'\n", reason);
|
|
|
|
talloc_free(conn);
|
|
}
|
|
|
|
NTSTATUS dcesrv_endpoint_by_ncacn_np_name(struct dcesrv_context *dce_ctx,
|
|
const char *pipe_name,
|
|
struct dcesrv_endpoint **out)
|
|
{
|
|
struct dcesrv_endpoint *e = NULL;
|
|
|
|
for (e = dce_ctx->endpoint_list; e; e = e->next) {
|
|
enum dcerpc_transport_t transport =
|
|
dcerpc_binding_get_transport(e->ep_description);
|
|
const char *endpoint = NULL;
|
|
|
|
if (transport != NCACN_NP) {
|
|
continue;
|
|
}
|
|
|
|
endpoint = dcerpc_binding_get_string_option(e->ep_description,
|
|
"endpoint");
|
|
if (endpoint == NULL) {
|
|
continue;
|
|
}
|
|
|
|
if (strncmp(endpoint, "\\pipe\\", 6) == 0) {
|
|
endpoint += 6;
|
|
}
|
|
|
|
if (strequal(endpoint, pipe_name)) {
|
|
*out = e;
|
|
return NT_STATUS_OK;
|
|
}
|
|
}
|
|
|
|
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
|
|
}
|
|
|
|
struct pipes_struct *dcesrv_get_pipes_struct(struct dcesrv_connection *conn)
|
|
{
|
|
struct dcerpc_ncacn_conn *ncacn_conn = talloc_get_type_abort(
|
|
conn->transport.private_data,
|
|
struct dcerpc_ncacn_conn);
|
|
|
|
return ncacn_conn->p;
|
|
}
|
|
|
|
/* vim: set ts=8 sw=8 noet cindent syntax=c.doxygen: */
|