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-rw-r--r--source3/rpc_server/rpc_server.c305
1 files changed, 305 insertions, 0 deletions
diff --git a/source3/rpc_server/rpc_server.c b/source3/rpc_server/rpc_server.c
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--- /dev/null
+++ b/source3/rpc_server/rpc_server.c
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+/*
+ Unix SMB/Netbios implementation.
+ Generic infrstructure for RPC Daemons
+ Copyright (C) Simo Sorce 2010
+ Copyright (C) Andrew Bartlett 2011
+ Copyright (C) Andreas Schneider 2011
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "librpc/rpc/dcesrv_core.h"
+#include "rpc_server/rpc_pipes.h"
+#include "rpc_server/rpc_server.h"
+#include "rpc_server/rpc_config.h"
+#include "rpc_dce.h"
+#include "librpc/gen_ndr/netlogon.h"
+#include "librpc/gen_ndr/auth.h"
+#include "lib/tsocket/tsocket.h"
+#include "libcli/named_pipe_auth/npa_tstream.h"
+#include "../auth/auth_sam_reply.h"
+#include "auth.h"
+#include "rpc_server/rpc_ncacn_np.h"
+#include "rpc_server/srv_pipe_hnd.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_RPC_SRV
+
+/* Start listening on the appropriate unix socket and setup all is needed to
+ * dispatch requests to the pipes rpc implementation */
+
+struct dcerpc_ncacn_listen_state {
+ int fd;
+
+ struct tevent_context *ev_ctx;
+ struct messaging_context *msg_ctx;
+ struct dcesrv_context *dce_ctx;
+ struct dcesrv_endpoint *endpoint;
+ dcerpc_ncacn_termination_fn termination_fn;
+ void *termination_data;
+};
+
+static void ncacn_terminate_connection(struct dcerpc_ncacn_conn *conn,
+ const char *reason);
+
+NTSTATUS dcesrv_auth_gensec_prepare(
+ TALLOC_CTX *mem_ctx,
+ struct dcesrv_call_state *call,
+ struct gensec_security **out,
+ void *private_data)
+{
+ 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,
+ void *private_data)
+{
+ 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 int dcesrv_assoc_group_destructor(struct dcesrv_assoc_group *assoc_group)
+{
+ int ret;
+ ret = idr_remove(assoc_group->dce_ctx->assoc_groups_idr,
+ assoc_group->id);
+ if (ret != 0) {
+ DBG_ERR("Failed to remove assoc_group 0x%08x\n",
+ assoc_group->id);
+ }
+ return 0;
+}
+
+static NTSTATUS dcesrv_assoc_group_new(struct dcesrv_call_state *call)
+{
+ 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;
+ int id;
+
+ assoc_group = talloc_zero(conn, struct dcesrv_assoc_group);
+ if (assoc_group == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ id = idr_get_new_random(dce_ctx->assoc_groups_idr,
+ assoc_group,
+ UINT16_MAX);
+ if (id == -1) {
+ TALLOC_FREE(assoc_group);
+ DBG_ERR("Out of association groups!\n");
+ return NT_STATUS_RPC_OUT_OF_RESOURCES;
+ }
+
+ assoc_group->transport = transport;
+ assoc_group->id = id;
+ assoc_group->dce_ctx = dce_ctx;
+
+ call->conn->assoc_group = assoc_group;
+
+ talloc_set_destructor(assoc_group, dcesrv_assoc_group_destructor);
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS dcesrv_assoc_group_reference(struct dcesrv_call_state *call,
+ uint32_t assoc_group_id)
+{
+ struct dcesrv_connection *conn = call->conn;
+ 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;
+ void *id_ptr = NULL;
+
+ /* find an association group given a assoc_group_id */
+ id_ptr = idr_find(conn->dce_ctx->assoc_groups_idr, assoc_group_id);
+ if (id_ptr == NULL) {
+ /*
+ * FIXME If the association group is not found it has
+ * been created in other process (preforking daemons).
+ * Until this is properly fixed we just create a new
+ * association group in this process
+ */
+ DBG_NOTICE("Failed to find assoc_group 0x%08x in this "
+ "server process, creating a new one\n",
+ assoc_group_id);
+ return dcesrv_assoc_group_new(call);
+ }
+ assoc_group = talloc_get_type_abort(id_ptr, struct dcesrv_assoc_group);
+
+ if (assoc_group->transport != transport) {
+ const char *at =
+ derpc_transport_string_by_transport(
+ assoc_group->transport);
+ const char *ct =
+ derpc_transport_string_by_transport(
+ transport);
+
+ DBG_NOTICE("assoc_group 0x%08x (transport %s) "
+ "is not available on transport %s",
+ assoc_group_id, at, ct);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ conn->assoc_group = talloc_reference(conn, assoc_group);
+ return NT_STATUS_OK;
+}
+
+NTSTATUS dcesrv_assoc_group_find(
+ struct dcesrv_call_state *call,
+ void *private_data)
+{
+ uint32_t assoc_group_id = call->pkt.u.bind.assoc_group_id;
+
+ if (assoc_group_id != 0) {
+ return dcesrv_assoc_group_reference(call, assoc_group_id);
+ }
+
+ /* If not requested by client create a new association group */
+ return dcesrv_assoc_group_new(call);
+}
+
+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: */
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