*/
#include "includes.h"
-#include "dcesrv_core.h"
+#include "librpc/rpc/dcesrv_core.h"
+#include "librpc/rpc/dcesrv_core_proto.h"
+#include "librpc/gen_ndr/auth.h"
+#include "auth/gensec/gensec.h"
+#include "lib/util/dlinklist.h"
+#include "libcli/security/security.h"
+#include "param/param.h"
+#include "lib/tsocket/tsocket.h"
+#include "librpc/gen_ndr/ndr_dcerpc.h"
+#include "lib/util/tevent_ntstatus.h"
+
+static NTSTATUS dcesrv_negotiate_contexts(struct dcesrv_call_state *call,
+ const struct dcerpc_bind *b,
+ struct dcerpc_ack_ctx *ack_ctx_list);
+
+/*
+ see if two endpoints match
+*/
+static bool endpoints_match(const struct dcerpc_binding *ep1,
+ const struct dcerpc_binding *ep2)
+{
+ enum dcerpc_transport_t t1;
+ enum dcerpc_transport_t t2;
+ const char *e1;
+ const char *e2;
+
+ t1 = dcerpc_binding_get_transport(ep1);
+ t2 = dcerpc_binding_get_transport(ep2);
+
+ e1 = dcerpc_binding_get_string_option(ep1, "endpoint");
+ e2 = dcerpc_binding_get_string_option(ep2, "endpoint");
+
+ if (t1 != t2) {
+ return false;
+ }
+
+ if (!e1 || !e2) {
+ return e1 == e2;
+ }
+
+ if (strcasecmp(e1, e2) != 0) {
+ return false;
+ }
+
+ return true;
+}
+
+/*
+ find an endpoint in the dcesrv_context
+*/
+static struct dcesrv_endpoint *find_endpoint(struct dcesrv_context *dce_ctx,
+ const struct dcerpc_binding *ep_description)
+{
+ struct dcesrv_endpoint *ep;
+ for (ep=dce_ctx->endpoint_list; ep; ep=ep->next) {
+ if (endpoints_match(ep->ep_description, ep_description)) {
+ return ep;
+ }
+ }
+ return NULL;
+}
+
+/*
+ find a registered context_id from a bind or alter_context
+*/
+static struct dcesrv_connection_context *dcesrv_find_context(struct dcesrv_connection *conn,
+ uint16_t context_id)
+{
+ struct dcesrv_connection_context *c;
+ for (c=conn->contexts;c;c=c->next) {
+ if (c->context_id == context_id) return c;
+ }
+ return NULL;
+}
+
+/*
+ see if a uuid and if_version match to an interface
+*/
+static bool interface_match(const struct dcesrv_interface *if1,
+ const struct dcesrv_interface *if2)
+{
+ return (if1->syntax_id.if_version == if2->syntax_id.if_version &&
+ GUID_equal(&if1->syntax_id.uuid, &if2->syntax_id.uuid));
+}
+
+/*
+ find the interface operations on any endpoint with this binding
+*/
+static const struct dcesrv_interface *find_interface_by_binding(struct dcesrv_context *dce_ctx,
+ struct dcerpc_binding *binding,
+ const struct dcesrv_interface *iface)
+{
+ struct dcesrv_endpoint *ep;
+ for (ep=dce_ctx->endpoint_list; ep; ep=ep->next) {
+ if (endpoints_match(ep->ep_description, binding)) {
+ struct dcesrv_if_list *ifl;
+ for (ifl=ep->interface_list; ifl; ifl=ifl->next) {
+ if (interface_match(&(ifl->iface), iface)) {
+ return &(ifl->iface);
+ }
+ }
+ }
+ }
+ return NULL;
+}
+
+/*
+ see if a uuid and if_version match to an interface
+*/
+static bool interface_match_by_uuid(const struct dcesrv_interface *iface,
+ const struct GUID *uuid, uint32_t if_version)
+{
+ return (iface->syntax_id.if_version == if_version &&
+ GUID_equal(&iface->syntax_id.uuid, uuid));
+}
+
+/*
+ find the interface operations on an endpoint by uuid
+*/
+const struct dcesrv_interface *find_interface_by_uuid(const struct dcesrv_endpoint *endpoint,
+ const struct GUID *uuid, uint32_t if_version)
+{
+ struct dcesrv_if_list *ifl;
+ for (ifl=endpoint->interface_list; ifl; ifl=ifl->next) {
+ if (interface_match_by_uuid(&(ifl->iface), uuid, if_version)) {
+ return &(ifl->iface);
+ }
+ }
+ return NULL;
+}
+
+/*
+ find the earlier parts of a fragmented call awaiting reassembily
+*/
+static struct dcesrv_call_state *dcesrv_find_fragmented_call(struct dcesrv_connection *dce_conn, uint32_t call_id)
+{
+ struct dcesrv_call_state *c;
+ for (c=dce_conn->incoming_fragmented_call_list;c;c=c->next) {
+ if (c->pkt.call_id == call_id) {
+ return c;
+ }
+ }
+ return NULL;
+}
+
+/*
+ register an interface on an endpoint
+
+ An endpoint is one unix domain socket (for ncalrpc), one TCP port
+ (for ncacn_ip_tcp) or one (forwarded) named pipe (for ncacn_np).
+
+ Each endpoint can have many interfaces such as netlogon, lsa or
+ samr. Some have essentially the full set.
+
+ This is driven from the set of interfaces listed in each IDL file
+ via the PIDL generated *__op_init_server() functions.
+*/
+_PUBLIC_ NTSTATUS dcesrv_interface_register(struct dcesrv_context *dce_ctx,
+ const char *ep_name,
+ const char *ncacn_np_secondary_endpoint,
+ const struct dcesrv_interface *iface,
+ const struct security_descriptor *sd)
+{
+ struct dcesrv_endpoint *ep;
+ struct dcesrv_if_list *ifl;
+ struct dcerpc_binding *binding;
+ struct dcerpc_binding *binding2 = NULL;
+ bool add_ep = false;
+ NTSTATUS status;
+ enum dcerpc_transport_t transport;
+ char *ep_string = NULL;
+ bool use_single_process = true;
+ const char *ep_process_string;
+
+ /*
+ * If we are not using handles, there is no need for force
+ * this service into using a single process.
+ *
+ * However, due to the way we listen for RPC packets, we can
+ * only do this if we have a single service per pipe or TCP
+ * port, so we still force a single combined process for
+ * ncalrpc.
+ */
+ if (iface->flags & DCESRV_INTERFACE_FLAGS_HANDLES_NOT_USED) {
+ use_single_process = false;
+ }
+
+ status = dcerpc_parse_binding(dce_ctx, ep_name, &binding);
+
+ if (NT_STATUS_IS_ERR(status)) {
+ DEBUG(0, ("Trouble parsing binding string '%s'\n", ep_name));
+ return status;
+ }
+
+ transport = dcerpc_binding_get_transport(binding);
+ if (transport == NCACN_IP_TCP) {
+ int port;
+ char port_str[6];
+
+ /*
+ * First check if there is already a port specified, eg
+ * for epmapper on ncacn_ip_tcp:[135]
+ */
+ const char *endpoint
+ = dcerpc_binding_get_string_option(binding,
+ "endpoint");
+ if (endpoint == NULL) {
+ port = lpcfg_parm_int(dce_ctx->lp_ctx, NULL,
+ "rpc server port", iface->name, 0);
+
+ /*
+ * For RPC services that are not set to use a single
+ * process, we do not default to using the 'rpc server
+ * port' because that would cause a double-bind on
+ * that port.
+ */
+ if (port == 0 && !use_single_process) {
+ port = lpcfg_rpc_server_port(dce_ctx->lp_ctx);
+ }
+ if (port != 0) {
+ snprintf(port_str, sizeof(port_str), "%u", port);
+ status = dcerpc_binding_set_string_option(binding,
+ "endpoint",
+ port_str);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ }
+ }
+ }
+
+ if (transport == NCACN_NP && ncacn_np_secondary_endpoint != NULL) {
+ enum dcerpc_transport_t transport2;
+
+ status = dcerpc_parse_binding(dce_ctx,
+ ncacn_np_secondary_endpoint,
+ &binding2);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Trouble parsing 2nd binding string '%s'\n",
+ ncacn_np_secondary_endpoint));
+ return status;
+ }
+
+ transport2 = dcerpc_binding_get_transport(binding2);
+ SMB_ASSERT(transport2 == transport);
+ }
+
+ /* see if the interface is already registered on the endpoint */
+ if (find_interface_by_binding(dce_ctx, binding, iface)!=NULL) {
+ DEBUG(0,("dcesrv_interface_register: interface '%s' already registered on endpoint '%s'\n",
+ iface->name, ep_name));
+ return NT_STATUS_OBJECT_NAME_COLLISION;
+ }
+
+ /* check if this endpoint exists
+ */
+ ep = find_endpoint(dce_ctx, binding);
+
+ if (ep != NULL) {
+ /*
+ * We want a new port on ncacn_ip_tcp for NETLOGON, so
+ * it can be multi-process. Other processes can also
+ * listen on distinct ports, if they have one forced
+ * in the code above with eg 'rpc server port:drsuapi = 1027'
+ *
+ * If we have mulitiple endpoints on port 0, they each
+ * get an epemeral port (currently by walking up from
+ * 1024).
+ *
+ * Because one endpoint can only have one process
+ * model, we add a new IP_TCP endpoint for each model.
+ *
+ * This works in conjunction with the forced overwrite
+ * of ep->use_single_process below.
+ */
+ if (ep->use_single_process != use_single_process
+ && transport == NCACN_IP_TCP) {
+ add_ep = true;
+ }
+ }
+
+ if (ep == NULL || add_ep) {
+ ep = talloc_zero(dce_ctx, struct dcesrv_endpoint);
+ if (!ep) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ ZERO_STRUCTP(ep);
+ ep->ep_description = talloc_move(ep, &binding);
+ ep->ep_2nd_description = talloc_move(ep, &binding2);
+ add_ep = true;
+
+ /* add mgmt interface */
+ ifl = talloc_zero(ep, struct dcesrv_if_list);
+ if (!ifl) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ ifl->iface = dcesrv_get_mgmt_interface();
+
+ DLIST_ADD(ep->interface_list, ifl);
+ }
+
+ /*
+ * By default don't force into a single process, but if any
+ * interface on this endpoint on this service uses handles
+ * (most do), then we must force into single process mode
+ *
+ * By overwriting this each time a new interface is added to
+ * this endpoint, we end up with the most restrictive setting.
+ */
+ if (use_single_process) {
+ ep->use_single_process = true;
+ }
+
+ /* talloc a new interface list element */
+ ifl = talloc_zero(ep, struct dcesrv_if_list);
+ if (!ifl) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* copy the given interface struct to the one on the endpoints interface list */
+ memcpy(&(ifl->iface),iface, sizeof(struct dcesrv_interface));
+
+ /* if we have a security descriptor given,
+ * we should see if we can set it up on the endpoint
+ */
+ if (sd != NULL) {
+ /* if there's currently no security descriptor given on the endpoint
+ * we try to set it
+ */
+ if (ep->sd == NULL) {
+ ep->sd = security_descriptor_copy(ep, sd);
+ }
+
+ /* if now there's no security descriptor given on the endpoint
+ * something goes wrong, either we failed to copy the security descriptor
+ * or there was already one on the endpoint
+ */
+ if (ep->sd != NULL) {
+ DEBUG(0,("dcesrv_interface_register: interface '%s' failed to setup a security descriptor\n"
+ " on endpoint '%s'\n",
+ iface->name, ep_name));
+ if (add_ep) free(ep);
+ free(ifl);
+ return NT_STATUS_OBJECT_NAME_COLLISION;
+ }
+ }
+
+ /* finally add the interface on the endpoint */
+ DLIST_ADD(ep->interface_list, ifl);
+
+ /* if it's a new endpoint add it to the dcesrv_context */
+ if (add_ep) {
+ DLIST_ADD(dce_ctx->endpoint_list, ep);
+ }
+
+ /* Re-get the string as we may have set a port */
+ ep_string = dcerpc_binding_string(dce_ctx, ep->ep_description);
+
+ if (use_single_process) {
+ ep_process_string = "single process required";
+ } else {
+ ep_process_string = "multi process compatible";
+ }
+
+ DBG_INFO("Interface '%s' registered on endpoint '%s' (%s)\n",
+ iface->name, ep_string, ep_process_string);
+ TALLOC_FREE(ep_string);
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS dcesrv_session_info_session_key(struct dcesrv_auth *auth,
+ DATA_BLOB *session_key)
+{
+ if (auth->session_info == NULL) {
+ return NT_STATUS_NO_USER_SESSION_KEY;
+ }
+
+ if (auth->session_info->session_key.length == 0) {
+ return NT_STATUS_NO_USER_SESSION_KEY;
+ }
+
+ *session_key = auth->session_info->session_key;
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS dcesrv_remote_session_key(struct dcesrv_auth *auth,
+ DATA_BLOB *session_key)
+{
+ if (auth->auth_type != DCERPC_AUTH_TYPE_NONE) {
+ return NT_STATUS_NO_USER_SESSION_KEY;
+ }
+
+ return dcesrv_session_info_session_key(auth, session_key);
+}
+
+static NTSTATUS dcesrv_local_fixed_session_key(struct dcesrv_auth *auth,
+ DATA_BLOB *session_key)
+{
+ return dcerpc_generic_session_key(session_key);
+}
+
+/*
+ * Fetch the authentication session key if available.
+ *
+ * This is the key generated by a gensec authentication.
+ *
+ */
+_PUBLIC_ NTSTATUS dcesrv_auth_session_key(struct dcesrv_call_state *call,
+ DATA_BLOB *session_key)
+{
+ struct dcesrv_auth *auth = call->auth_state;
+ SMB_ASSERT(auth->auth_finished);
+ return dcesrv_session_info_session_key(auth, session_key);
+}
+
+/*
+ * Fetch the transport session key if available.
+ * Typically this is the SMB session key
+ * or a fixed key for local transports.
+ *
+ * The key is always truncated to 16 bytes.
+*/
+_PUBLIC_ NTSTATUS dcesrv_transport_session_key(struct dcesrv_call_state *call,
+ DATA_BLOB *session_key)
+{
+ struct dcesrv_auth *auth = call->auth_state;
+ NTSTATUS status;
+
+ SMB_ASSERT(auth->auth_finished);
+
+ if (auth->session_key_fn == NULL) {
+ return NT_STATUS_NO_USER_SESSION_KEY;
+ }
+
+ status = auth->session_key_fn(auth, session_key);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ session_key->length = MIN(session_key->length, 16);
+
+ return NT_STATUS_OK;
+}
+
+static struct dcesrv_auth *dcesrv_auth_create(struct dcesrv_connection *conn)
+{
+ const struct dcesrv_endpoint *ep = conn->endpoint;
+ enum dcerpc_transport_t transport =
+ dcerpc_binding_get_transport(ep->ep_description);
+ struct dcesrv_auth *auth = NULL;
+
+ auth = talloc_zero(conn, struct dcesrv_auth);
+ if (auth == NULL) {
+ return NULL;
+ }
+
+ switch (transport) {
+ case NCACN_NP:
+ auth->session_key_fn = dcesrv_remote_session_key;
+ break;
+ case NCALRPC:
+ case NCACN_UNIX_STREAM:
+ auth->session_key_fn = dcesrv_local_fixed_session_key;
+ break;
+ default:
+ /*
+ * All other's get a NULL pointer, which
+ * results in NT_STATUS_NO_USER_SESSION_KEY
+ */
+ break;
+ }
+
+ return auth;
+}
+
+/*
+ connect to a dcerpc endpoint
+*/
+_PUBLIC_ NTSTATUS dcesrv_endpoint_connect(struct dcesrv_context *dce_ctx,
+ TALLOC_CTX *mem_ctx,
+ const struct dcesrv_endpoint *ep,
+ struct auth_session_info *session_info,
+ struct tevent_context *event_ctx,
+ uint32_t state_flags,
+ struct dcesrv_connection **_p)
+{
+ struct dcesrv_auth *auth = NULL;
+ struct dcesrv_connection *p;
+
+ if (!session_info) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ p = talloc_zero(mem_ctx, struct dcesrv_connection);
+ NT_STATUS_HAVE_NO_MEMORY(p);
+
+ p->dce_ctx = dce_ctx;
+ p->endpoint = ep;
+ p->packet_log_dir = lpcfg_lock_directory(dce_ctx->lp_ctx);
+ p->event_ctx = event_ctx;
+ p->state_flags = state_flags;
+ p->allow_bind = true;
+ p->max_recv_frag = 5840;
+ p->max_xmit_frag = 5840;
+ p->max_total_request_size = DCERPC_NCACN_REQUEST_DEFAULT_MAX_SIZE;
+
+ p->support_hdr_signing = lpcfg_parm_bool(dce_ctx->lp_ctx,
+ NULL,
+ "dcesrv",
+ "header signing",
+ true);
+ p->max_auth_states = lpcfg_parm_ulong(dce_ctx->lp_ctx,
+ NULL,
+ "dcesrv",
+ "max auth states",
+ 2049);
+
+ auth = dcesrv_auth_create(p);
+ if (auth == NULL) {
+ talloc_free(p);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ auth->session_info = talloc_reference(auth, session_info);
+ if (auth->session_info == NULL) {
+ talloc_free(p);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ p->default_auth_state = auth;
+
+ /*
+ * For now we only support NDR32.
+ */
+ p->preferred_transfer = &ndr_transfer_syntax_ndr;
+
+ *_p = p;
+ return NT_STATUS_OK;
+}
+
+/*
+ move a call from an existing linked list to the specified list. This
+ prevents bugs where we forget to remove the call from a previous
+ list when moving it.
+ */
+static void dcesrv_call_set_list(struct dcesrv_call_state *call,
+ enum dcesrv_call_list list)
+{
+ switch (call->list) {
+ case DCESRV_LIST_NONE:
+ break;
+ case DCESRV_LIST_CALL_LIST:
+ DLIST_REMOVE(call->conn->call_list, call);
+ break;
+ case DCESRV_LIST_FRAGMENTED_CALL_LIST:
+ DLIST_REMOVE(call->conn->incoming_fragmented_call_list, call);
+ break;
+ case DCESRV_LIST_PENDING_CALL_LIST:
+ DLIST_REMOVE(call->conn->pending_call_list, call);
+ break;
+ }
+ call->list = list;
+ switch (list) {
+ case DCESRV_LIST_NONE:
+ break;
+ case DCESRV_LIST_CALL_LIST:
+ DLIST_ADD_END(call->conn->call_list, call);
+ break;
+ case DCESRV_LIST_FRAGMENTED_CALL_LIST:
+ DLIST_ADD_END(call->conn->incoming_fragmented_call_list, call);
+ break;
+ case DCESRV_LIST_PENDING_CALL_LIST:
+ DLIST_ADD_END(call->conn->pending_call_list, call);
+ break;
+ }
+}
+
+static void dcesrv_call_disconnect_after(struct dcesrv_call_state *call,
+ const char *reason)
+{
+ struct dcesrv_auth *a = NULL;
+
+ if (call->conn->terminate != NULL) {
+ return;
+ }
+
+ call->conn->allow_bind = false;
+ call->conn->allow_alter = false;
+
+ call->conn->default_auth_state->auth_invalid = true;
+
+ for (a = call->conn->auth_states; a != NULL; a = a->next) {
+ a->auth_invalid = true;
+ }
+
+ call->terminate_reason = talloc_strdup(call, reason);
+ if (call->terminate_reason == NULL) {
+ call->terminate_reason = __location__;
+ }
+}
+
+/*
+ return a dcerpc bind_nak
+*/
+static NTSTATUS dcesrv_bind_nak(struct dcesrv_call_state *call, uint32_t reason)
+{
+ struct ncacn_packet pkt;
+ struct dcerpc_bind_nak_version version;
+ struct data_blob_list_item *rep;
+ NTSTATUS status;
+ static const uint8_t _pad[3] = { 0, };
+
+ /*
+ * We add the call to the pending_call_list
+ * in order to defer the termination.
+ */
+ dcesrv_call_disconnect_after(call, "dcesrv_bind_nak");
+
+ /* setup a bind_nak */
+ dcesrv_init_hdr(&pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx));
+ pkt.auth_length = 0;
+ pkt.call_id = call->pkt.call_id;
+ pkt.ptype = DCERPC_PKT_BIND_NAK;
+ pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
+ pkt.u.bind_nak.reject_reason = reason;
+ version.rpc_vers = 5;
+ version.rpc_vers_minor = 0;
+ pkt.u.bind_nak.num_versions = 1;
+ pkt.u.bind_nak.versions = &version;
+ pkt.u.bind_nak._pad = data_blob_const(_pad, sizeof(_pad));
+
+ rep = talloc_zero(call, struct data_blob_list_item);
+ if (!rep) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = dcerpc_ncacn_push_auth(&rep->blob, call, &pkt, NULL);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ dcerpc_set_frag_length(&rep->blob, rep->blob.length);
+
+ DLIST_ADD_END(call->replies, rep);
+ dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST);
+
+ if (call->conn->call_list && call->conn->call_list->replies) {
+ if (call->conn->transport.report_output_data) {
+ call->conn->transport.report_output_data(call->conn);
+ }
+ }
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS dcesrv_fault_disconnect(struct dcesrv_call_state *call,
+ uint32_t fault_code)
+{
+ /*
+ * We add the call to the pending_call_list
+ * in order to defer the termination.
+ */
+ dcesrv_call_disconnect_after(call, "dcesrv_fault_disconnect");
+
+ return dcesrv_fault_with_flags(call, fault_code,
+ DCERPC_PFC_FLAG_DID_NOT_EXECUTE);
+}
+
+static int dcesrv_connection_context_destructor(struct dcesrv_connection_context *c)
+{
+ DLIST_REMOVE(c->conn->contexts, c);
+
+ if (c->iface && c->iface->unbind) {
+ c->iface->unbind(c, c->iface);
+ c->iface = NULL;
+ }
+
+ return 0;
+}
+
+static void dcesrv_prepare_context_auth(struct dcesrv_call_state *dce_call)
+{
+ struct loadparm_context *lp_ctx = dce_call->conn->dce_ctx->lp_ctx;
+ const struct dcesrv_endpoint *endpoint = dce_call->conn->endpoint;
+ enum dcerpc_transport_t transport =
+ dcerpc_binding_get_transport(endpoint->ep_description);
+ struct dcesrv_connection_context *context = dce_call->context;
+ const struct dcesrv_interface *iface = context->iface;
+
+ context->min_auth_level = DCERPC_AUTH_LEVEL_NONE;
+
+ if (transport == NCALRPC) {
+ context->allow_connect = true;
+ return;
+ }
+
+ /*
+ * allow overwrite per interface
+ * allow dcerpc auth level connect:<interface>
+ */
+ context->allow_connect = lpcfg_allow_dcerpc_auth_level_connect(lp_ctx);
+ context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL,
+ "allow dcerpc auth level connect",
+ iface->name,
+ context->allow_connect);
+}
+
+NTSTATUS dcesrv_interface_bind_require_integrity(struct dcesrv_connection_context *context,
+ const struct dcesrv_interface *iface)
+{
+ /*
+ * For connection oriented DCERPC DCERPC_AUTH_LEVEL_PACKET (4)
+ * has the same behavior as DCERPC_AUTH_LEVEL_INTEGRITY (5).
+ */
+ context->min_auth_level = DCERPC_AUTH_LEVEL_PACKET;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS dcesrv_interface_bind_require_privacy(struct dcesrv_connection_context *context,
+ const struct dcesrv_interface *iface)
+{
+ context->min_auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
+ return NT_STATUS_OK;
+}
+
+_PUBLIC_ NTSTATUS dcesrv_interface_bind_reject_connect(struct dcesrv_connection_context *context,
+ const struct dcesrv_interface *iface)
+{
+ struct loadparm_context *lp_ctx = context->conn->dce_ctx->lp_ctx;
+ const struct dcesrv_endpoint *endpoint = context->conn->endpoint;
+ enum dcerpc_transport_t transport =
+ dcerpc_binding_get_transport(endpoint->ep_description);
+
+ if (transport == NCALRPC) {
+ context->allow_connect = true;
+ return NT_STATUS_OK;
+ }
+
+ /*
+ * allow overwrite per interface
+ * allow dcerpc auth level connect:<interface>
+ */
+ context->allow_connect = false;
+ context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL,
+ "allow dcerpc auth level connect",
+ iface->name,
+ context->allow_connect);
+ return NT_STATUS_OK;
+}
+
+_PUBLIC_ NTSTATUS dcesrv_interface_bind_allow_connect(struct dcesrv_connection_context *context,
+ const struct dcesrv_interface *iface)
+{
+ struct loadparm_context *lp_ctx = context->conn->dce_ctx->lp_ctx;
+ const struct dcesrv_endpoint *endpoint = context->conn->endpoint;
+ enum dcerpc_transport_t transport =
+ dcerpc_binding_get_transport(endpoint->ep_description);
+
+ if (transport == NCALRPC) {
+ context->allow_connect = true;
+ return NT_STATUS_OK;
+ }
+
+ /*
+ * allow overwrite per interface
+ * allow dcerpc auth level connect:<interface>
+ */
+ context->allow_connect = true;
+ context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL,
+ "allow dcerpc auth level connect",
+ iface->name,
+ context->allow_connect);
+ return NT_STATUS_OK;
+}
+
+struct dcesrv_conn_auth_wait_context {
+ struct tevent_req *req;
+ bool done;
+ NTSTATUS status;
+};
+
+struct dcesrv_conn_auth_wait_state {
+ uint8_t dummy;
+};
+
+static struct tevent_req *dcesrv_conn_auth_wait_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ void *private_data)
+{
+ struct dcesrv_conn_auth_wait_context *auth_wait =
+ talloc_get_type_abort(private_data,
+ struct dcesrv_conn_auth_wait_context);
+ struct tevent_req *req = NULL;
+ struct dcesrv_conn_auth_wait_state *state = NULL;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct dcesrv_conn_auth_wait_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ auth_wait->req = req;
+
+ tevent_req_defer_callback(req, ev);
+
+ if (!auth_wait->done) {
+ return req;
+ }
+
+ if (tevent_req_nterror(req, auth_wait->status)) {
+ return tevent_req_post(req, ev);
+ }
+
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+}
+
+static NTSTATUS dcesrv_conn_auth_wait_recv(struct tevent_req *req)
+{
+ return tevent_req_simple_recv_ntstatus(req);
+}
+
+static NTSTATUS dcesrv_conn_auth_wait_setup(struct dcesrv_connection *conn)
+{
+ struct dcesrv_conn_auth_wait_context *auth_wait = NULL;
+
+ if (conn->wait_send != NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ auth_wait = talloc_zero(conn, struct dcesrv_conn_auth_wait_context);
+ if (auth_wait == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ conn->wait_private = auth_wait;
+ conn->wait_send = dcesrv_conn_auth_wait_send;
+ conn->wait_recv = dcesrv_conn_auth_wait_recv;
+ return NT_STATUS_OK;
+}
+
+static void dcesrv_conn_auth_wait_finished(struct dcesrv_connection *conn,
+ NTSTATUS status)
+{
+ struct dcesrv_conn_auth_wait_context *auth_wait =
+ talloc_get_type_abort(conn->wait_private,
+ struct dcesrv_conn_auth_wait_context);
+
+ auth_wait->done = true;
+ auth_wait->status = status;
+
+ if (auth_wait->req == NULL) {
+ return;
+ }
+
+ if (tevent_req_nterror(auth_wait->req, status)) {
+ return;
+ }
+
+ tevent_req_done(auth_wait->req);
+}
+
+static NTSTATUS dcesrv_auth_reply(struct dcesrv_call_state *call);
+
+static void dcesrv_bind_done(struct tevent_req *subreq);
+
+/*
+ handle a bind request
+*/
+static NTSTATUS dcesrv_bind(struct dcesrv_call_state *call)
+{
+ struct dcesrv_connection *conn = call->conn;
+ struct ncacn_packet *pkt = &call->ack_pkt;
+ NTSTATUS status;
+ uint32_t extra_flags = 0;
+ uint16_t max_req = 0;
+ uint16_t max_rep = 0;
+ struct dcerpc_binding *ep_2nd_description = NULL;
+ const char *endpoint = NULL;
+ struct dcesrv_auth *auth = call->auth_state;
+ struct dcerpc_ack_ctx *ack_ctx_list = NULL;
+ struct dcerpc_ack_ctx *ack_features = NULL;
+ struct tevent_req *subreq = NULL;
+ size_t i;
+
+ status = dcerpc_verify_ncacn_packet_header(&call->pkt,
+ DCERPC_PKT_BIND,
+ call->pkt.u.bind.auth_info.length,
+ 0, /* required flags */
+ DCERPC_PFC_FLAG_FIRST |
+ DCERPC_PFC_FLAG_LAST |
+ DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN |
+ 0x08 | /* this is not defined, but should be ignored */
+ DCERPC_PFC_FLAG_CONC_MPX |
+ DCERPC_PFC_FLAG_DID_NOT_EXECUTE |
+ DCERPC_PFC_FLAG_MAYBE |
+ DCERPC_PFC_FLAG_OBJECT_UUID);
+ if (!NT_STATUS_IS_OK(status)) {
+ return dcesrv_bind_nak(call,
+ DCERPC_BIND_NAK_REASON_PROTOCOL_VERSION_NOT_SUPPORTED);
+ }
+
+ /* max_recv_frag and max_xmit_frag result always in the same value! */
+ max_req = MIN(call->pkt.u.bind.max_xmit_frag,
+ call->pkt.u.bind.max_recv_frag);
+ /*
+ * The values are between 2048 and 5840 tested against Windows 2012R2
+ * via ncacn_ip_tcp on port 135.
+ */
+ max_req = MAX(2048, max_req);
+ max_rep = MIN(max_req, call->conn->max_recv_frag);
+ /* They are truncated to an 8 byte boundary. */
+ max_rep &= 0xFFF8;
+
+ /* max_recv_frag and max_xmit_frag result always in the same value! */
+ call->conn->max_recv_frag = max_rep;
+ call->conn->max_xmit_frag = max_rep;
+
+ status = call->conn->dce_ctx->callbacks.assoc_group.find(call);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_NOTICE("Failed to find assoc_group 0x%08x: %s\n",
+ call->pkt.u.bind.assoc_group_id, nt_errstr(status));
+ return dcesrv_bind_nak(call, 0);
+ }
+
+ if (call->pkt.u.bind.num_contexts < 1) {
+ return dcesrv_bind_nak(call, 0);
+ }
+
+ ack_ctx_list = talloc_zero_array(call, struct dcerpc_ack_ctx,
+ call->pkt.u.bind.num_contexts);
+ if (ack_ctx_list == NULL) {
+ return dcesrv_bind_nak(call, 0);
+ }
+
+ /*
+ * Set some sane defaults (required by dcesrv_negotiate_contexts()/
+ * dcesrv_check_or_create_context()) and do some protocol validation
+ * and set sane defaults.
+ */
+ for (i = 0; i < call->pkt.u.bind.num_contexts; i++) {
+ const struct dcerpc_ctx_list *c = &call->pkt.u.bind.ctx_list[i];
+ struct dcerpc_ack_ctx *a = &ack_ctx_list[i];
+ bool is_feature = false;
+ uint64_t features = 0;
+
+ if (c->num_transfer_syntaxes == 0) {
+ return dcesrv_bind_nak(call, 0);
+ }
+
+ a->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION;
+ a->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED;
+
+ /*
+ * It's only treated as bind time feature request, if the first
+ * transfer_syntax matches, all others are ignored.
+ */
+ is_feature = dcerpc_extract_bind_time_features(c->transfer_syntaxes[0],
+ &features);
+ if (!is_feature) {
+ continue;
+ }
+
+ if (ack_features != NULL) {
+ /*
+ * Only one bind time feature context is allowed.
+ */
+ return dcesrv_bind_nak(call, 0);
+ }
+ ack_features = a;
+
+ a->result = DCERPC_BIND_ACK_RESULT_NEGOTIATE_ACK;
+ a->reason.negotiate = 0;
+ if (features & DCERPC_BIND_TIME_SECURITY_CONTEXT_MULTIPLEXING) {
+ if (call->conn->max_auth_states != 0) {
+ a->reason.negotiate |=
+ DCERPC_BIND_TIME_SECURITY_CONTEXT_MULTIPLEXING;
+ }
+ }
+ if (features & DCERPC_BIND_TIME_KEEP_CONNECTION_ON_ORPHAN) {
+ a->reason.negotiate |=
+ DCERPC_BIND_TIME_KEEP_CONNECTION_ON_ORPHAN;
+ }
+
+ call->conn->assoc_group->bind_time_features = a->reason.negotiate;
+ }
+
+ /*
+ * Try to negotiate one new presentation context.
+ *
+ * Deep in here we locate the iface (by uuid) that the client
+ * requested, from the list of interfaces on the
+ * call->conn->endpoint, and call iface->bind() on that iface.
+ *
+ * call->conn was set up at the accept() of the socket, and
+ * call->conn->endpoint has a list of interfaces restricted to
+ * this port or pipe.
+ */
+ status = dcesrv_negotiate_contexts(call, &call->pkt.u.bind, ack_ctx_list);
+ if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) {
+ return dcesrv_bind_nak(call, 0);
+ }
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /*
+ * At this point we still don't know which interface (eg
+ * netlogon, lsa, drsuapi) the caller requested in this bind!
+ * The most recently added context is available as the first
+ * element in the linked list at call->conn->contexts, that is
+ * call->conn->contexts->iface, but they may not have
+ * requested one at all!
+ */
+
+ if ((call->pkt.pfc_flags & DCERPC_PFC_FLAG_CONC_MPX) &&
+ (call->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) {
+ call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED;
+ extra_flags |= DCERPC_PFC_FLAG_CONC_MPX;
+ }
+
+ if (call->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) {
+ call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL;
+ }
+
+ /*
+ * After finding the interface and setting up the NDR
+ * transport negotiation etc, handle any authentication that
+ * is being requested.
+ */
+ if (!dcesrv_auth_bind(call)) {
+
+ if (auth->auth_level == DCERPC_AUTH_LEVEL_NONE) {
+ /*
+ * With DCERPC_AUTH_LEVEL_NONE, we get the
+ * reject_reason in auth->auth_context_id.
+ */
+ return dcesrv_bind_nak(call, auth->auth_context_id);
+ }
+
+ /*
+ * This must a be a temporary failure e.g. talloc or invalid
+ * configuration, e.g. no machine account.
+ */
+ return dcesrv_bind_nak(call,
+ DCERPC_BIND_NAK_REASON_TEMPORARY_CONGESTION);
+ }
+
+ /* setup a bind_ack */
+ dcesrv_init_hdr(pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx));
+ pkt->auth_length = 0;
+ pkt->call_id = call->pkt.call_id;
+ pkt->ptype = DCERPC_PKT_BIND_ACK;
+ pkt->pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | extra_flags;
+ pkt->u.bind_ack.max_xmit_frag = call->conn->max_xmit_frag;
+ pkt->u.bind_ack.max_recv_frag = call->conn->max_recv_frag;
+ pkt->u.bind_ack.assoc_group_id = call->conn->assoc_group->id;
+
+ ep_2nd_description = call->conn->endpoint->ep_2nd_description;
+ if (ep_2nd_description == NULL) {
+ ep_2nd_description = call->conn->endpoint->ep_description;
+ }
+
+ endpoint = dcerpc_binding_get_string_option(
+ ep_2nd_description,
+ "endpoint");
+ if (endpoint == NULL) {
+ endpoint = "";
+ }
+
+ pkt->u.bind_ack.secondary_address = endpoint;
+ pkt->u.bind_ack.num_results = call->pkt.u.bind.num_contexts;
+ pkt->u.bind_ack.ctx_list = ack_ctx_list;
+ pkt->u.bind_ack.auth_info = data_blob_null;
+
+ status = dcesrv_auth_prepare_bind_ack(call, pkt);
+ if (!NT_STATUS_IS_OK(status)) {
+ return dcesrv_bind_nak(call, 0);
+ }
+
+ if (auth->auth_finished) {
+ return dcesrv_auth_reply(call);
+ }
+
+ subreq = gensec_update_send(call, call->event_ctx,
+ auth->gensec_security,
+ call->in_auth_info.credentials);
+ if (subreq == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ tevent_req_set_callback(subreq, dcesrv_bind_done, call);
+
+ return dcesrv_conn_auth_wait_setup(conn);
+}
+
+static void dcesrv_bind_done(struct tevent_req *subreq)
+{
+ struct dcesrv_call_state *call =
+ tevent_req_callback_data(subreq,
+ struct dcesrv_call_state);
+ struct dcesrv_connection *conn = call->conn;
+ NTSTATUS status;
+
+ status = gensec_update_recv(subreq, call,
+ &call->out_auth_info->credentials);
+ TALLOC_FREE(subreq);
+
+ status = dcesrv_auth_complete(call, status);
+ if (!NT_STATUS_IS_OK(status)) {
+ status = dcesrv_bind_nak(call, 0);
+ dcesrv_conn_auth_wait_finished(conn, status);
+ return;
+ }
+
+ status = dcesrv_auth_reply(call);
+ dcesrv_conn_auth_wait_finished(conn, status);
+ return;
+}
+
+static NTSTATUS dcesrv_auth_reply(struct dcesrv_call_state *call)
+{
+ struct ncacn_packet *pkt = &call->ack_pkt;
+ struct data_blob_list_item *rep = NULL;
+ NTSTATUS status;
+
+ rep = talloc_zero(call, struct data_blob_list_item);
+ if (!rep) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = dcerpc_ncacn_push_auth(&rep->blob,
+ call,
+ pkt,
+ call->out_auth_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ dcerpc_set_frag_length(&rep->blob, rep->blob.length);
+
+ DLIST_ADD_END(call->replies, rep);
+ dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST);
+
+ if (call->conn->call_list && call->conn->call_list->replies) {
+ if (call->conn->transport.report_output_data) {
+ call->conn->transport.report_output_data(call->conn);
+ }
+ }
+
+ return NT_STATUS_OK;
+}
+
+
+static void dcesrv_auth3_done(struct tevent_req *subreq);
+
+/*
+ handle a auth3 request
+*/
+static NTSTATUS dcesrv_auth3(struct dcesrv_call_state *call)
+{
+ struct dcesrv_connection *conn = call->conn;
+ struct dcesrv_auth *auth = call->auth_state;
+ struct tevent_req *subreq = NULL;
+ NTSTATUS status;
+
+ if (!auth->auth_started) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ if (auth->auth_finished) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ status = dcerpc_verify_ncacn_packet_header(&call->pkt,
+ DCERPC_PKT_AUTH3,
+ call->pkt.u.auth3.auth_info.length,
+ 0, /* required flags */
+ DCERPC_PFC_FLAG_FIRST |
+ DCERPC_PFC_FLAG_LAST |
+ DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN |
+ 0x08 | /* this is not defined, but should be ignored */
+ DCERPC_PFC_FLAG_CONC_MPX |
+ DCERPC_PFC_FLAG_DID_NOT_EXECUTE |
+ DCERPC_PFC_FLAG_MAYBE |
+ DCERPC_PFC_FLAG_OBJECT_UUID);
+ if (!NT_STATUS_IS_OK(status)) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ /* handle the auth3 in the auth code */
+ if (!dcesrv_auth_prepare_auth3(call)) {
+ /*
+ * we don't send a reply to a auth3 request,
+ * except by a fault.
+ *
+ * In anycase we mark the connection as
+ * invalid.
+ */
+ auth->auth_invalid = true;
+ if (call->fault_code != 0) {
+ return dcesrv_fault_disconnect(call, call->fault_code);
+ }
+ TALLOC_FREE(call);
+ return NT_STATUS_OK;
+ }
+
+ subreq = gensec_update_send(call, call->event_ctx,
+ auth->gensec_security,
+ call->in_auth_info.credentials);
+ if (subreq == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ tevent_req_set_callback(subreq, dcesrv_auth3_done, call);
+
+ return dcesrv_conn_auth_wait_setup(conn);
+}
+
+static void dcesrv_auth3_done(struct tevent_req *subreq)
+{
+ struct dcesrv_call_state *call =
+ tevent_req_callback_data(subreq,
+ struct dcesrv_call_state);
+ struct dcesrv_connection *conn = call->conn;
+ struct dcesrv_auth *auth = call->auth_state;
+ NTSTATUS status;
+
+ status = gensec_update_recv(subreq, call,
+ &call->out_auth_info->credentials);
+ TALLOC_FREE(subreq);
+
+ status = dcesrv_auth_complete(call, status);
+ if (!NT_STATUS_IS_OK(status)) {
+ /*
+ * we don't send a reply to a auth3 request,
+ * except by a fault.
+ *
+ * In anycase we mark the connection as
+ * invalid.
+ */
+ auth->auth_invalid = true;
+ if (call->fault_code != 0) {
+ status = dcesrv_fault_disconnect(call, call->fault_code);
+ dcesrv_conn_auth_wait_finished(conn, status);
+ return;
+ }
+ TALLOC_FREE(call);
+ dcesrv_conn_auth_wait_finished(conn, NT_STATUS_OK);
+ return;
+ }
+
+ /*
+ * we don't send a reply to a auth3 request.
+ */
+ TALLOC_FREE(call);
+ dcesrv_conn_auth_wait_finished(conn, NT_STATUS_OK);
+ return;
+}
+
+
+static NTSTATUS dcesrv_check_or_create_context(struct dcesrv_call_state *call,
+ const struct dcerpc_bind *b,
+ const struct dcerpc_ctx_list *ctx,
+ struct dcerpc_ack_ctx *ack,
+ bool validate_only,
+ const struct ndr_syntax_id *supported_transfer)
+{
+ uint32_t if_version;
+ struct dcesrv_connection_context *context;
+ const struct dcesrv_interface *iface;
+ struct GUID uuid;
+ NTSTATUS status;
+ const struct ndr_syntax_id *selected_transfer = NULL;
+ size_t i;
+ bool ok;
+
+ if (b == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ if (ctx == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ if (ctx->num_transfer_syntaxes < 1) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ if (ack == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ if (supported_transfer == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ switch (ack->result) {
+ case DCERPC_BIND_ACK_RESULT_ACCEPTANCE:
+ case DCERPC_BIND_ACK_RESULT_NEGOTIATE_ACK:
+ /*
+ * We is already completed.
+ */
+ return NT_STATUS_OK;
+ default:
+ break;
+ }
+
+ ack->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION;
+ ack->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED;
+
+ if_version = ctx->abstract_syntax.if_version;
+ uuid = ctx->abstract_syntax.uuid;
+
+ iface = find_interface_by_uuid(call->conn->endpoint, &uuid, if_version);
+ if (iface == NULL) {
+ char *uuid_str = GUID_string(call, &uuid);
+ DEBUG(2,("Request for unknown dcerpc interface %s/%d\n", uuid_str, if_version));
+ talloc_free(uuid_str);
+ /*
+ * We report this only via ack->result
+ */
+ return NT_STATUS_OK;
+ }
+
+ ack->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION;
+ ack->reason.value = DCERPC_BIND_ACK_REASON_TRANSFER_SYNTAXES_NOT_SUPPORTED;
+
+ if (validate_only) {
+ /*
+ * We report this only via ack->result
+ */
+ return NT_STATUS_OK;
+ }
+
+ for (i = 0; i < ctx->num_transfer_syntaxes; i++) {
+ /*
+ * we only do NDR encoded dcerpc for now.
+ */
+ ok = ndr_syntax_id_equal(&ctx->transfer_syntaxes[i],
+ supported_transfer);
+ if (ok) {
+ selected_transfer = supported_transfer;
+ break;
+ }
+ }
+
+ context = dcesrv_find_context(call->conn, ctx->context_id);
+ if (context != NULL) {
+ ok = ndr_syntax_id_equal(&context->iface->syntax_id,
+ &ctx->abstract_syntax);
+ if (!ok) {
+ return NT_STATUS_RPC_PROTOCOL_ERROR;
+ }
+
+ if (selected_transfer != NULL) {
+ ok = ndr_syntax_id_equal(&context->transfer_syntax,
+ selected_transfer);
+ if (!ok) {
+ return NT_STATUS_RPC_PROTOCOL_ERROR;
+ }
+
+ ack->result = DCERPC_BIND_ACK_RESULT_ACCEPTANCE;
+ ack->reason.value = DCERPC_BIND_ACK_REASON_NOT_SPECIFIED;
+ ack->syntax = context->transfer_syntax;
+ }
+
+ /*
+ * We report this only via ack->result
+ */
+ return NT_STATUS_OK;
+ }
+
+ if (selected_transfer == NULL) {
+ /*
+ * We report this only via ack->result
+ */
+ return NT_STATUS_OK;
+ }
+
+ ack->result = DCERPC_BIND_ACK_RESULT_USER_REJECTION;
+ ack->reason.value = DCERPC_BIND_ACK_REASON_LOCAL_LIMIT_EXCEEDED;
+
+ /* add this context to the list of available context_ids */
+ context = talloc_zero(call->conn, struct dcesrv_connection_context);
+ if (context == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ context->conn = call->conn;
+ context->context_id = ctx->context_id;
+ context->iface = iface;
+ context->transfer_syntax = *selected_transfer;
+ DLIST_ADD(call->conn->contexts, context);
+ call->context = context;
+ talloc_set_destructor(context, dcesrv_connection_context_destructor);
+
+ dcesrv_prepare_context_auth(call);
+
+ /*
+ * Multiplex is supported by default
+ */
+ call->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED;
+
+ status = iface->bind(context, iface);
+ call->context = NULL;
+ if (!NT_STATUS_IS_OK(status)) {
+ /* we don't want to trigger the iface->unbind() hook */
+ context->iface = NULL;
+ talloc_free(context);
+ /*
+ * We report this only via ack->result
+ */
+ return NT_STATUS_OK;
+ }
+
+ ack->result = DCERPC_BIND_ACK_RESULT_ACCEPTANCE;
+ ack->reason.value = DCERPC_BIND_ACK_REASON_NOT_SPECIFIED;
+ ack->syntax = context->transfer_syntax;
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS dcesrv_negotiate_contexts(struct dcesrv_call_state *call,
+ const struct dcerpc_bind *b,
+ struct dcerpc_ack_ctx *ack_ctx_list)
+{
+ NTSTATUS status;
+ size_t i;
+ bool validate_only = false;
+ bool preferred_ndr32;
+
+ /*
+ * Try to negotiate one new presentation context,
+ * using our preferred transfer syntax.
+ */
+ for (i = 0; i < b->num_contexts; i++) {
+ const struct dcerpc_ctx_list *c = &b->ctx_list[i];
+ struct dcerpc_ack_ctx *a = &ack_ctx_list[i];
+
+ status = dcesrv_check_or_create_context(call, b, c, a,
+ validate_only,
+ call->conn->preferred_transfer);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ if (a->result == DCERPC_BIND_ACK_RESULT_ACCEPTANCE) {
+ /*
+ * We managed to negotiate one context.
+ *
+ * => we're done.
+ */
+ validate_only = true;
+ }
+ }
+
+ preferred_ndr32 = ndr_syntax_id_equal(&ndr_transfer_syntax_ndr,
+ call->conn->preferred_transfer);
+ if (preferred_ndr32) {
+ /*
+ * We're done.
+ */
+ return NT_STATUS_OK;
+ }
+
+ /*
+ * Try to negotiate one new presentation context,
+ * using NDR 32 as fallback.
+ */
+ for (i = 0; i < b->num_contexts; i++) {
+ const struct dcerpc_ctx_list *c = &b->ctx_list[i];
+ struct dcerpc_ack_ctx *a = &ack_ctx_list[i];
+
+ status = dcesrv_check_or_create_context(call, b, c, a,
+ validate_only,
+ &ndr_transfer_syntax_ndr);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ if (a->result == DCERPC_BIND_ACK_RESULT_ACCEPTANCE) {
+ /*
+ * We managed to negotiate one context.
+ *
+ * => we're done.
+ */
+ validate_only = true;
+ }
+ }
+
+ return NT_STATUS_OK;
+}
+
+static void dcesrv_alter_done(struct tevent_req *subreq);
+
+/*
+ handle a alter context request
+*/
+static NTSTATUS dcesrv_alter(struct dcesrv_call_state *call)
+{
+ struct dcesrv_connection *conn = call->conn;
+ NTSTATUS status;
+ bool auth_ok = false;
+ struct ncacn_packet *pkt = &call->ack_pkt;
+ uint32_t extra_flags = 0;
+ struct dcesrv_auth *auth = call->auth_state;
+ struct dcerpc_ack_ctx *ack_ctx_list = NULL;
+ struct tevent_req *subreq = NULL;
+ size_t i;
+
+ if (!call->conn->allow_alter) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ status = dcerpc_verify_ncacn_packet_header(&call->pkt,
+ DCERPC_PKT_ALTER,
+ call->pkt.u.alter.auth_info.length,
+ 0, /* required flags */
+ DCERPC_PFC_FLAG_FIRST |
+ DCERPC_PFC_FLAG_LAST |
+ DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN |
+ 0x08 | /* this is not defined, but should be ignored */
+ DCERPC_PFC_FLAG_CONC_MPX |
+ DCERPC_PFC_FLAG_DID_NOT_EXECUTE |
+ DCERPC_PFC_FLAG_MAYBE |
+ DCERPC_PFC_FLAG_OBJECT_UUID);
+ if (!NT_STATUS_IS_OK(status)) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ auth_ok = dcesrv_auth_alter(call);
+ if (!auth_ok) {
+ if (call->fault_code != 0) {
+ return dcesrv_fault_disconnect(call, call->fault_code);
+ }
+ }
+
+ if (call->pkt.u.alter.num_contexts < 1) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ ack_ctx_list = talloc_zero_array(call, struct dcerpc_ack_ctx,
+ call->pkt.u.alter.num_contexts);
+ if (ack_ctx_list == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /*
+ * Set some sane defaults (required by dcesrv_negotiate_contexts()/
+ * dcesrv_check_or_create_context()) and do some protocol validation
+ * and set sane defaults.
+ */
+ for (i = 0; i < call->pkt.u.alter.num_contexts; i++) {
+ const struct dcerpc_ctx_list *c = &call->pkt.u.alter.ctx_list[i];
+ struct dcerpc_ack_ctx *a = &ack_ctx_list[i];
+
+ if (c->num_transfer_syntaxes == 0) {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ a->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION;
+ a->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED;
+ }
+
+ /*
+ * Try to negotiate one new presentation context.
+ */
+ status = dcesrv_negotiate_contexts(call, &call->pkt.u.alter, ack_ctx_list);
+ if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ if ((call->pkt.pfc_flags & DCERPC_PFC_FLAG_CONC_MPX) &&
+ (call->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) {
+ call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED;
+ extra_flags |= DCERPC_PFC_FLAG_CONC_MPX;
+ }
+
+ if (call->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) {
+ call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL;
+ }
+
+ /* handle any authentication that is being requested */
+ if (!auth_ok) {
+ if (call->in_auth_info.auth_type != auth->auth_type) {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_FAULT_SEC_PKG_ERROR);
+ }
+ return dcesrv_fault_disconnect(call, DCERPC_FAULT_ACCESS_DENIED);
+ }
+
+ dcesrv_init_hdr(pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx));
+ pkt->auth_length = 0;
+ pkt->call_id = call->pkt.call_id;
+ pkt->ptype = DCERPC_PKT_ALTER_RESP;
+ pkt->pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | extra_flags;
+ pkt->u.alter_resp.max_xmit_frag = call->conn->max_xmit_frag;
+ pkt->u.alter_resp.max_recv_frag = call->conn->max_recv_frag;
+ pkt->u.alter_resp.assoc_group_id = call->conn->assoc_group->id;
+ pkt->u.alter_resp.secondary_address = "";
+ pkt->u.alter_resp.num_results = call->pkt.u.alter.num_contexts;
+ pkt->u.alter_resp.ctx_list = ack_ctx_list;
+ pkt->u.alter_resp.auth_info = data_blob_null;
+
+ status = dcesrv_auth_prepare_alter_ack(call, pkt);
+ if (!NT_STATUS_IS_OK(status)) {
+ return dcesrv_fault_disconnect(call, DCERPC_FAULT_SEC_PKG_ERROR);
+ }
+
+ if (auth->auth_finished) {
+ return dcesrv_auth_reply(call);
+ }
+
+ subreq = gensec_update_send(call, call->event_ctx,
+ auth->gensec_security,
+ call->in_auth_info.credentials);
+ if (subreq == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ tevent_req_set_callback(subreq, dcesrv_alter_done, call);
+
+ return dcesrv_conn_auth_wait_setup(conn);
+}
+
+static void dcesrv_alter_done(struct tevent_req *subreq)
+{
+ struct dcesrv_call_state *call =
+ tevent_req_callback_data(subreq,
+ struct dcesrv_call_state);
+ struct dcesrv_connection *conn = call->conn;
+ NTSTATUS status;
+
+ status = gensec_update_recv(subreq, call,
+ &call->out_auth_info->credentials);
+ TALLOC_FREE(subreq);
+
+ status = dcesrv_auth_complete(call, status);
+ if (!NT_STATUS_IS_OK(status)) {
+ status = dcesrv_fault_disconnect(call, DCERPC_FAULT_SEC_PKG_ERROR);
+ dcesrv_conn_auth_wait_finished(conn, status);
+ return;
+ }
+
+ status = dcesrv_auth_reply(call);
+ dcesrv_conn_auth_wait_finished(conn, status);
+ return;
+}
+
+/*
+ possibly save the call for inspection with ndrdump
+ */
+static void dcesrv_save_call(struct dcesrv_call_state *call, const char *why)
+{
+#ifdef DEVELOPER
+ char *fname;
+ const char *dump_dir;
+ dump_dir = lpcfg_parm_string(call->conn->dce_ctx->lp_ctx, NULL, "dcesrv", "stubs directory");
+ if (!dump_dir) {
+ return;
+ }
+ fname = talloc_asprintf(call, "%s/RPC-%s-%u-%s.dat",
+ dump_dir,
+ call->context->iface->name,
+ call->pkt.u.request.opnum,
+ why);
+ if (file_save(fname, call->pkt.u.request.stub_and_verifier.data, call->pkt.u.request.stub_and_verifier.length)) {
+ DEBUG(0,("RPC SAVED %s\n", fname));
+ }
+ talloc_free(fname);
+#endif
+}
+
+static NTSTATUS dcesrv_check_verification_trailer(struct dcesrv_call_state *call)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ const uint32_t bitmask1 = call->conn->client_hdr_signing ?
+ DCERPC_SEC_VT_CLIENT_SUPPORTS_HEADER_SIGNING : 0;
+ const struct dcerpc_sec_vt_pcontext pcontext = {
+ .abstract_syntax = call->context->iface->syntax_id,
+ .transfer_syntax = call->context->transfer_syntax,
+ };
+ const struct dcerpc_sec_vt_header2 header2 =
+ dcerpc_sec_vt_header2_from_ncacn_packet(&call->pkt);
+ enum ndr_err_code ndr_err;
+ struct dcerpc_sec_verification_trailer *vt = NULL;
+ NTSTATUS status = NT_STATUS_OK;
+ bool ok;
+
+ SMB_ASSERT(call->pkt.ptype == DCERPC_PKT_REQUEST);
+
+ ndr_err = ndr_pop_dcerpc_sec_verification_trailer(call->ndr_pull,
+ frame, &vt);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ status = ndr_map_error2ntstatus(ndr_err);
+ goto done;
+ }
+
+ ok = dcerpc_sec_verification_trailer_check(vt, &bitmask1,
+ &pcontext, &header2);
+ if (!ok) {
+ status = NT_STATUS_ACCESS_DENIED;
+ goto done;
+ }
+done:
+ TALLOC_FREE(frame);
+ return status;
+}
+
+/*
+ handle a dcerpc request packet
+*/
+static NTSTATUS dcesrv_request(struct dcesrv_call_state *call)
+{
+ const struct dcesrv_endpoint *endpoint = call->conn->endpoint;
+ struct dcesrv_auth *auth = call->auth_state;
+ enum dcerpc_transport_t transport =
+ dcerpc_binding_get_transport(endpoint->ep_description);
+ struct ndr_pull *pull;
+ NTSTATUS status;
+
+ if (!auth->auth_finished) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ /* if authenticated, and the mech we use can't do async replies, don't use them... */
+ if (auth->gensec_security != NULL &&
+ !gensec_have_feature(auth->gensec_security, GENSEC_FEATURE_ASYNC_REPLIES)) {
+ call->state_flags &= ~DCESRV_CALL_STATE_FLAG_MAY_ASYNC;
+ }
+
+ if (call->context == NULL) {
+ return dcesrv_fault_with_flags(call, DCERPC_NCA_S_UNKNOWN_IF,
+ DCERPC_PFC_FLAG_DID_NOT_EXECUTE);
+ }
+
+ switch (auth->auth_level) {
+ case DCERPC_AUTH_LEVEL_NONE:
+ case DCERPC_AUTH_LEVEL_PACKET:
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ break;
+ default:
+ if (!call->context->allow_connect) {
+ char *addr;
+
+ addr = tsocket_address_string(call->conn->remote_address,
+ call);
+
+ DEBUG(2, ("%s: restrict auth_level_connect access "
+ "to [%s] with auth[type=0x%x,level=0x%x] "
+ "on [%s] from [%s]\n",
+ __func__, call->context->iface->name,
+ auth->auth_type,
+ auth->auth_level,
+ derpc_transport_string_by_transport(transport),
+ addr));
+ return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
+ }
+ break;
+ }
+
+ if (auth->auth_level < call->context->min_auth_level) {
+ char *addr;
+
+ addr = tsocket_address_string(call->conn->remote_address, call);
+
+ DEBUG(2, ("%s: restrict access by min_auth_level[0x%x] "
+ "to [%s] with auth[type=0x%x,level=0x%x] "
+ "on [%s] from [%s]\n",
+ __func__,
+ call->context->min_auth_level,
+ call->context->iface->name,
+ auth->auth_type,
+ auth->auth_level,
+ derpc_transport_string_by_transport(transport),
+ addr));
+ return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
+ }
+
+ pull = ndr_pull_init_blob(&call->pkt.u.request.stub_and_verifier, call);
+ NT_STATUS_HAVE_NO_MEMORY(pull);
+
+ pull->flags |= LIBNDR_FLAG_REF_ALLOC;
+
+ call->ndr_pull = pull;
+
+ if (!(call->pkt.drep[0] & DCERPC_DREP_LE)) {
+ pull->flags |= LIBNDR_FLAG_BIGENDIAN;
+ }
+
+ status = dcesrv_check_verification_trailer(call);
+ if (!NT_STATUS_IS_OK(status)) {
+ uint32_t faultcode = DCERPC_FAULT_OTHER;
+ if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
+ faultcode = DCERPC_FAULT_ACCESS_DENIED;
+ }
+ DEBUG(10, ("dcesrv_check_verification_trailer failed: %s\n",
+ nt_errstr(status)));
+ return dcesrv_fault(call, faultcode);
+ }
+
+ /* unravel the NDR for the packet */
+ status = call->context->iface->ndr_pull(call, call, pull, &call->r);
+ if (!NT_STATUS_IS_OK(status)) {
+ uint8_t extra_flags = 0;
+ if (call->fault_code == DCERPC_FAULT_OP_RNG_ERROR) {
+ /* we got an unknown call */
+ DEBUG(3,(__location__ ": Unknown RPC call %u on %s\n",
+ call->pkt.u.request.opnum,
+ call->context->iface->name));
+ dcesrv_save_call(call, "unknown");
+ extra_flags |= DCERPC_PFC_FLAG_DID_NOT_EXECUTE;
+ } else {
+ dcesrv_save_call(call, "pullfail");
+ }
+ return dcesrv_fault_with_flags(call, call->fault_code, extra_flags);
+ }
+
+ if (pull->offset != pull->data_size) {
+ dcesrv_save_call(call, "extrabytes");
+ DEBUG(3,("Warning: %d extra bytes in incoming RPC request\n",
+ pull->data_size - pull->offset));
+ }
+
+ /* call the dispatch function */
+ status = call->context->iface->dispatch(call, call, call->r);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5,("dcerpc fault in call %s:%02x - %s\n",
+ call->context->iface->name,
+ call->pkt.u.request.opnum,
+ dcerpc_errstr(pull, call->fault_code)));
+ return dcesrv_fault(call, call->fault_code);
+ }
+
+ /* add the call to the pending list */
+ dcesrv_call_set_list(call, DCESRV_LIST_PENDING_CALL_LIST);
+
+ if (call->state_flags & DCESRV_CALL_STATE_FLAG_ASYNC) {
+ return NT_STATUS_OK;
+ }
+
+ return dcesrv_reply(call);
+}
+
+
+/*
+ remove the call from the right list when freed
+ */
+static int dcesrv_call_dequeue(struct dcesrv_call_state *call)
+{
+ dcesrv_call_set_list(call, DCESRV_LIST_NONE);
+ return 0;
+}
+
+_PUBLIC_ const struct tsocket_address *dcesrv_connection_get_local_address(struct dcesrv_connection *conn)
+{
+ return conn->local_address;
+}
+
+_PUBLIC_ const struct tsocket_address *dcesrv_connection_get_remote_address(struct dcesrv_connection *conn)
+{
+ return conn->remote_address;
+}
+
+/*
+ process some input to a dcerpc endpoint server.
+*/
+static NTSTATUS dcesrv_process_ncacn_packet(struct dcesrv_connection *dce_conn,
+ struct ncacn_packet *pkt,
+ DATA_BLOB blob)
+{
+ NTSTATUS status;
+ struct dcesrv_call_state *call;
+ struct dcesrv_call_state *existing = NULL;
+ size_t num_auth_ctx = 0;
+ enum dcerpc_AuthType auth_type = 0;
+ enum dcerpc_AuthLevel auth_level = 0;
+ uint32_t auth_context_id = 0;
+
+ call = talloc_zero(dce_conn, struct dcesrv_call_state);
+ if (!call) {
+ data_blob_free(&blob);
+ talloc_free(pkt);
+ return NT_STATUS_NO_MEMORY;
+ }
+ call->conn = dce_conn;
+ call->event_ctx = dce_conn->event_ctx;
+ call->state_flags = call->conn->state_flags;
+ call->time = timeval_current();
+ call->list = DCESRV_LIST_NONE;
+
+ talloc_steal(call, pkt);
+ talloc_steal(call, blob.data);
+ call->pkt = *pkt;
+
+ if (dce_conn->max_auth_states == 0) {
+ call->auth_state = dce_conn->default_auth_state;
+ } else if (call->pkt.auth_length == 0) {
+ if (call->pkt.ptype == DCERPC_PKT_REQUEST &&
+ dce_conn->default_auth_level_connect != NULL)
+ {
+ call->auth_state = dce_conn->default_auth_level_connect;
+ } else {
+ call->auth_state = dce_conn->default_auth_state;
+ }
+ }
+
+ if (call->auth_state == NULL) {
+ struct dcesrv_auth *a = NULL;
+
+ auth_type = dcerpc_get_auth_type(&blob);
+ auth_level = dcerpc_get_auth_level(&blob);
+ auth_context_id = dcerpc_get_auth_context_id(&blob);
+
+ if (call->pkt.ptype == DCERPC_PKT_REQUEST) {
+ dce_conn->default_auth_level_connect = NULL;
+ if (auth_level == DCERPC_AUTH_LEVEL_CONNECT) {
+ dce_conn->got_explicit_auth_level_connect = true;
+ }
+ }
+
+ for (a = dce_conn->auth_states; a != NULL; a = a->next) {
+ num_auth_ctx++;
+
+ if (a->auth_type != auth_type) {
+ continue;
+ }
+ if (a->auth_finished && a->auth_level != auth_level) {
+ continue;
+ }
+ if (a->auth_context_id != auth_context_id) {
+ continue;
+ }
+
+ DLIST_PROMOTE(dce_conn->auth_states, a);
+ call->auth_state = a;
+ break;
+ }
+ }
+
+ if (call->auth_state == NULL) {
+ struct dcesrv_auth *a = NULL;
+
+ if (num_auth_ctx >= dce_conn->max_auth_states) {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ a = dcesrv_auth_create(dce_conn);
+ if (a == NULL) {
+ talloc_free(call);
+ return NT_STATUS_NO_MEMORY;
+ }
+ DLIST_ADD(dce_conn->auth_states, a);
+ if (call->pkt.ptype == DCERPC_PKT_REQUEST) {
+ /*
+ * This can never be valid.
+ */
+ a->auth_invalid = true;
+ }
+ call->auth_state = a;
+ }
+
+ talloc_set_destructor(call, dcesrv_call_dequeue);
+
+ if (call->conn->allow_bind) {
+ /*
+ * Only one bind is possible per connection
+ */
+ call->conn->allow_bind = false;
+ return dcesrv_bind(call);
+ }
+
+ /* we have to check the signing here, before combining the
+ pdus */
+ if (call->pkt.ptype == DCERPC_PKT_REQUEST) {
+ dcesrv_default_auth_state_prepare_request(call);
+
+ if (call->auth_state->auth_started &&
+ !call->auth_state->auth_finished) {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ status = dcerpc_verify_ncacn_packet_header(&call->pkt,
+ DCERPC_PKT_REQUEST,
+ call->pkt.u.request.stub_and_verifier.length,
+ 0, /* required_flags */
+ DCERPC_PFC_FLAG_FIRST |
+ DCERPC_PFC_FLAG_LAST |
+ DCERPC_PFC_FLAG_PENDING_CANCEL |
+ 0x08 | /* this is not defined, but should be ignored */
+ DCERPC_PFC_FLAG_CONC_MPX |
+ DCERPC_PFC_FLAG_DID_NOT_EXECUTE |
+ DCERPC_PFC_FLAG_MAYBE |
+ DCERPC_PFC_FLAG_OBJECT_UUID);
+ if (!NT_STATUS_IS_OK(status)) {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ if (call->pkt.frag_length > DCERPC_FRAG_MAX_SIZE) {
+ /*
+ * We don't use dcesrv_fault_disconnect()
+ * here, because we don't want to set
+ * DCERPC_PFC_FLAG_DID_NOT_EXECUTE
+ *
+ * Note that we don't check against the negotiated
+ * max_recv_frag, but a hard coded value.
+ */
+ dcesrv_call_disconnect_after(call,
+ "dcesrv_auth_request - frag_length too large");
+ return dcesrv_fault(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_FIRST) {
+ if (dce_conn->pending_call_list != NULL) {
+ /*
+ * concurrent requests are only allowed
+ * if DCERPC_PFC_FLAG_CONC_MPX was negotiated.
+ */
+ if (!(dce_conn->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) {
+ dcesrv_call_disconnect_after(call,
+ "dcesrv_auth_request - "
+ "existing pending call without CONN_MPX");
+ return dcesrv_fault(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+ }
+ /* only one request is possible in the fragmented list */
+ if (dce_conn->incoming_fragmented_call_list != NULL) {
+ if (!(dce_conn->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) {
+ /*
+ * Without DCERPC_PFC_FLAG_CONC_MPX
+ * we need to return the FAULT on the
+ * already existing call.
+ *
+ * This is important to get the
+ * call_id and context_id right.
+ */
+ TALLOC_FREE(call);
+ call = dce_conn->incoming_fragmented_call_list;
+ }
+ dcesrv_call_disconnect_after(call,
+ "dcesrv_auth_request - "
+ "existing fragmented call");
+ return dcesrv_fault(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+ if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_PENDING_CANCEL) {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_FAULT_NO_CALL_ACTIVE);
+ }
+ call->context = dcesrv_find_context(call->conn,
+ call->pkt.u.request.context_id);
+ if (call->context == NULL) {
+ return dcesrv_fault_with_flags(call, DCERPC_NCA_S_UNKNOWN_IF,
+ DCERPC_PFC_FLAG_DID_NOT_EXECUTE);
+ }
+ } else {
+ const struct dcerpc_request *nr = &call->pkt.u.request;
+ const struct dcerpc_request *er = NULL;
+ int cmp;
+
+ existing = dcesrv_find_fragmented_call(dce_conn,
+ call->pkt.call_id);
+ if (existing == NULL) {
+ dcesrv_call_disconnect_after(call,
+ "dcesrv_auth_request - "
+ "no existing fragmented call");
+ return dcesrv_fault(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+ er = &existing->pkt.u.request;
+
+ if (call->pkt.ptype != existing->pkt.ptype) {
+ /* trying to play silly buggers are we? */
+ return dcesrv_fault_disconnect(existing,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+ cmp = memcmp(call->pkt.drep, existing->pkt.drep,
+ sizeof(pkt->drep));
+ if (cmp != 0) {
+ return dcesrv_fault_disconnect(existing,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+ if (nr->context_id != er->context_id) {
+ return dcesrv_fault_disconnect(existing,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+ if (nr->opnum != er->opnum) {
+ return dcesrv_fault_disconnect(existing,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+ }
+ }
+
+ if (call->pkt.ptype == DCERPC_PKT_REQUEST) {
+ bool ok;
+ uint8_t payload_offset = DCERPC_REQUEST_LENGTH;
+
+ if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) {
+ payload_offset += 16;
+ }
+
+ ok = dcesrv_auth_pkt_pull(call, &blob,
+ 0, /* required_flags */
+ DCERPC_PFC_FLAG_FIRST |
+ DCERPC_PFC_FLAG_LAST |
+ DCERPC_PFC_FLAG_PENDING_CANCEL |
+ 0x08 | /* this is not defined, but should be ignored */
+ DCERPC_PFC_FLAG_CONC_MPX |
+ DCERPC_PFC_FLAG_DID_NOT_EXECUTE |
+ DCERPC_PFC_FLAG_MAYBE |
+ DCERPC_PFC_FLAG_OBJECT_UUID,
+ payload_offset,
+ &call->pkt.u.request.stub_and_verifier);
+ if (!ok) {
+ /*
+ * We don't use dcesrv_fault_disconnect()
+ * here, because we don't want to set
+ * DCERPC_PFC_FLAG_DID_NOT_EXECUTE
+ */
+ dcesrv_call_disconnect_after(call,
+ "dcesrv_auth_request - failed");
+ if (call->fault_code == 0) {
+ call->fault_code = DCERPC_FAULT_ACCESS_DENIED;
+ }
+ return dcesrv_fault(call, call->fault_code);
+ }
+ }
+
+ /* see if this is a continued packet */
+ if (existing != NULL) {
+ struct dcerpc_request *er = &existing->pkt.u.request;
+ const struct dcerpc_request *nr = &call->pkt.u.request;
+ size_t available;
+ size_t alloc_size;
+ size_t alloc_hint;
+
+ /*
+ * Up to 4 MByte are allowed by all fragments
+ */
+ available = dce_conn->max_total_request_size;
+ if (er->stub_and_verifier.length > available) {
+ dcesrv_call_disconnect_after(existing,
+ "dcesrv_auth_request - existing payload too large");
+ return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED);
+ }
+ available -= er->stub_and_verifier.length;
+ if (nr->alloc_hint > available) {
+ dcesrv_call_disconnect_after(existing,
+ "dcesrv_auth_request - alloc hint too large");
+ return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED);
+ }
+ if (nr->stub_and_verifier.length > available) {
+ dcesrv_call_disconnect_after(existing,
+ "dcesrv_auth_request - new payload too large");
+ return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED);
+ }
+ alloc_hint = er->stub_and_verifier.length + nr->alloc_hint;
+ /* allocate at least 1 byte */
+ alloc_hint = MAX(alloc_hint, 1);
+ alloc_size = er->stub_and_verifier.length +
+ nr->stub_and_verifier.length;
+ alloc_size = MAX(alloc_size, alloc_hint);
+
+ er->stub_and_verifier.data =
+ talloc_realloc(existing,
+ er->stub_and_verifier.data,
+ uint8_t, alloc_size);
+ if (er->stub_and_verifier.data == NULL) {
+ TALLOC_FREE(call);
+ return dcesrv_fault_with_flags(existing,
+ DCERPC_FAULT_OUT_OF_RESOURCES,
+ DCERPC_PFC_FLAG_DID_NOT_EXECUTE);
+ }
+ memcpy(er->stub_and_verifier.data +
+ er->stub_and_verifier.length,
+ nr->stub_and_verifier.data,
+ nr->stub_and_verifier.length);
+ er->stub_and_verifier.length += nr->stub_and_verifier.length;
+
+ existing->pkt.pfc_flags |= (call->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST);
+
+ TALLOC_FREE(call);
+ call = existing;
+ }
+
+ /* this may not be the last pdu in the chain - if its isn't then
+ just put it on the incoming_fragmented_call_list and wait for the rest */
+ if (call->pkt.ptype == DCERPC_PKT_REQUEST &&
+ !(call->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST)) {
+ /*
+ * Up to 4 MByte are allowed by all fragments
+ */
+ if (call->pkt.u.request.alloc_hint > dce_conn->max_total_request_size) {
+ dcesrv_call_disconnect_after(call,
+ "dcesrv_auth_request - initial alloc hint too large");
+ return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
+ }
+ dcesrv_call_set_list(call, DCESRV_LIST_FRAGMENTED_CALL_LIST);
+ return NT_STATUS_OK;
+ }
+
+ /* This removes any fragments we may have had stashed away */
+ dcesrv_call_set_list(call, DCESRV_LIST_NONE);
+
+ switch (call->pkt.ptype) {
+ case DCERPC_PKT_BIND:
+ status = dcesrv_bind_nak(call,
+ DCERPC_BIND_NAK_REASON_NOT_SPECIFIED);
+ break;
+ case DCERPC_PKT_AUTH3:
+ status = dcesrv_auth3(call);
+ break;
+ case DCERPC_PKT_ALTER:
+ status = dcesrv_alter(call);
+ break;
+ case DCERPC_PKT_REQUEST:
+ status = dcesrv_request(call);
+ break;
+ case DCERPC_PKT_CO_CANCEL:
+ case DCERPC_PKT_ORPHANED:
+ /*
+ * Window just ignores CO_CANCEL and ORPHANED,
+ * so we do...
+ */
+ status = NT_STATUS_OK;
+ TALLOC_FREE(call);
+ break;
+ case DCERPC_PKT_BIND_ACK:
+ case DCERPC_PKT_BIND_NAK:
+ case DCERPC_PKT_ALTER_RESP:
+ case DCERPC_PKT_RESPONSE:
+ case DCERPC_PKT_FAULT:
+ case DCERPC_PKT_SHUTDOWN:
+ default:
+ status = dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ break;
+ }
+
+ /* if we are going to be sending a reply then add
+ it to the list of pending calls. We add it to the end to keep the call
+ list in the order we will answer */
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(call);
+ }
+
+ return status;
+}
+
+_PUBLIC_ NTSTATUS dcesrv_init_context(TALLOC_CTX *mem_ctx,
+ struct loadparm_context *lp_ctx,
+ const char **endpoint_servers,
+ struct dcesrv_context_callbacks *cb,
+ struct dcesrv_context **_dce_ctx)
+{
+ NTSTATUS status;
+ struct dcesrv_context *dce_ctx;
+ int i;
+
+ if (!endpoint_servers) {
+ DEBUG(0,("dcesrv_init_context: no endpoint servers configured\n"));
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ dce_ctx = talloc_zero(mem_ctx, struct dcesrv_context);
+ NT_STATUS_HAVE_NO_MEMORY(dce_ctx);
+
+ if (uid_wrapper_enabled()) {
+ setenv("UID_WRAPPER_MYUID", "1", 1);
+ }
+ dce_ctx->initial_euid = geteuid();
+ if (uid_wrapper_enabled()) {
+ unsetenv("UID_WRAPPER_MYUID");
+ }
+
+ dce_ctx->endpoint_list = NULL;
+ dce_ctx->lp_ctx = lp_ctx;
+ dce_ctx->assoc_groups_idr = idr_init(dce_ctx);
+ NT_STATUS_HAVE_NO_MEMORY(dce_ctx->assoc_groups_idr);
+ dce_ctx->broken_connections = NULL;
+ if (cb != NULL) {
+ dce_ctx->callbacks = *cb;
+ }
+
+ for (i=0;endpoint_servers[i];i++) {
+ const struct dcesrv_endpoint_server *ep_server;
+
+ ep_server = dcesrv_ep_server_byname(endpoint_servers[i]);
+ if (!ep_server) {
+ DEBUG(0,("dcesrv_init_context: failed to find endpoint server = '%s'\n", endpoint_servers[i]));
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ status = ep_server->init_server(dce_ctx, ep_server);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("dcesrv_init_context: failed to init endpoint server = '%s': %s\n", endpoint_servers[i],
+ nt_errstr(status)));
+ return status;
+ }
+ }
+
+ *_dce_ctx = dce_ctx;
+ return NT_STATUS_OK;
+}
+
+/* the list of currently registered DCERPC endpoint servers.
+ */
+static struct ep_server {
+ struct dcesrv_endpoint_server *ep_server;
+} *ep_servers = NULL;
+static int num_ep_servers;
+
+/*
+ register a DCERPC endpoint server.
+
+ The 'name' can be later used by other backends to find the operations
+ structure for this backend.
+
+*/
+_PUBLIC_ NTSTATUS dcerpc_register_ep_server(const struct dcesrv_endpoint_server *ep_server)
+{
+
+ if (dcesrv_ep_server_byname(ep_server->name) != NULL) {
+ /* its already registered! */
+ DEBUG(0,("DCERPC endpoint server '%s' already registered\n",
+ ep_server->name));
+ return NT_STATUS_OBJECT_NAME_COLLISION;
+ }
+
+ ep_servers = realloc_p(ep_servers, struct ep_server, num_ep_servers+1);
+ if (!ep_servers) {
+ smb_panic("out of memory in dcerpc_register");
+ }
+
+ ep_servers[num_ep_servers].ep_server = smb_xmemdup(ep_server, sizeof(*ep_server));
+ ep_servers[num_ep_servers].ep_server->name = smb_xstrdup(ep_server->name);
+
+ num_ep_servers++;
+
+ DEBUG(3,("DCERPC endpoint server '%s' registered\n",
+ ep_server->name));
+
+ return NT_STATUS_OK;
+}
+
+/*
+ return the operations structure for a named backend of the specified type
+*/
+_PUBLIC_ const struct dcesrv_endpoint_server *dcesrv_ep_server_byname(const char *name)
+{
+ int i;
+
+ for (i=0;i<num_ep_servers;i++) {
+ if (strcmp(ep_servers[i].ep_server->name, name) == 0) {
+ return ep_servers[i].ep_server;
+ }
+ }
+
+ return NULL;
+}
+
+/*
+ return the DCERPC module version, and the size of some critical types
+ This can be used by endpoint server modules to either detect compilation errors, or provide
+ multiple implementations for different smbd compilation options in one module
+*/
+const struct dcesrv_critical_sizes *dcerpc_module_version(void)
+{
+ static const struct dcesrv_critical_sizes critical_sizes = {
+ DCERPC_MODULE_VERSION,
+ sizeof(struct dcesrv_context),
+ sizeof(struct dcesrv_endpoint),
+ sizeof(struct dcesrv_endpoint_server),
+ sizeof(struct dcesrv_interface),
+ sizeof(struct dcesrv_if_list),
+ sizeof(struct dcesrv_connection),
+ sizeof(struct dcesrv_call_state),
+ sizeof(struct dcesrv_auth),
+ sizeof(struct dcesrv_handle)
+ };
+
+ return &critical_sizes;
+}
+
+_PUBLIC_ void dcesrv_terminate_connection(struct dcesrv_connection *dce_conn, const char *reason)
+{
+ struct dcesrv_context *dce_ctx = dce_conn->dce_ctx;
+ struct dcesrv_auth *a = NULL;
+
+ dce_conn->wait_send = NULL;
+ dce_conn->wait_recv = NULL;
+ dce_conn->wait_private = NULL;
+
+ dce_conn->allow_bind = false;
+ dce_conn->allow_alter = false;
+
+ dce_conn->default_auth_state->auth_invalid = true;
+
+ for (a = dce_conn->auth_states; a != NULL; a = a->next) {
+ a->auth_invalid = true;
+ }
+
+ if (dce_conn->pending_call_list == NULL) {
+ char *full_reason = talloc_asprintf(dce_conn, "dcesrv: %s", reason);
+
+ DLIST_REMOVE(dce_ctx->broken_connections, dce_conn);
+ dce_conn->transport.terminate_connection(dce_conn,
+ full_reason ? full_reason : reason);
+ return;
+ }
+
+ if (dce_conn->terminate != NULL) {
+ return;
+ }
+
+ DEBUG(3,("dcesrv: terminating connection due to '%s' deferred due to pending calls\n",
+ reason));
+ dce_conn->terminate = talloc_strdup(dce_conn, reason);
+ if (dce_conn->terminate == NULL) {
+ dce_conn->terminate = "dcesrv: deferred terminating connection - no memory";
+ }
+ DLIST_ADD_END(dce_ctx->broken_connections, dce_conn);
+}
+
+_PUBLIC_ void dcesrv_cleanup_broken_connections(struct dcesrv_context *dce_ctx)
+{
+ struct dcesrv_connection *cur, *next;
+
+ next = dce_ctx->broken_connections;
+ while (next != NULL) {
+ cur = next;
+ next = cur->next;
+
+ if (cur->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) {
+ struct dcesrv_connection_context *context_cur, *context_next;
+
+ context_next = cur->contexts;
+ while (context_next != NULL) {
+ context_cur = context_next;
+ context_next = context_cur->next;
+
+ dcesrv_connection_context_destructor(context_cur);
+ }
+ }
+
+ dcesrv_terminate_connection(cur, cur->terminate);
+ }
+}
+
+/* We need this include to be able to compile on some plateforms
+ * (ie. freebsd 7.2) as it seems that <sys/uio.h> is not included
+ * correctly.
+ * It has to be that deep because otherwise we have a conflict on
+ * const struct dcesrv_interface declaration.
+ * This is mostly due to socket_wrapper defining #define bind swrap_bind
+ * which conflict with the bind used before.
+ */
+#include "system/network.h"
+
+struct dcesrv_sock_reply_state {
+ struct dcesrv_connection *dce_conn;
+ struct dcesrv_call_state *call;
+ struct iovec iov;
+};
+
+static void dcesrv_sock_reply_done(struct tevent_req *subreq);
+static void dcesrv_call_terminate_step1(struct tevent_req *subreq);
+
+_PUBLIC_ void dcesrv_sock_report_output_data(struct dcesrv_connection *dce_conn)
+{
+ struct dcesrv_call_state *call;
+
+ call = dce_conn->call_list;
+ if (!call || !call->replies) {
+ return;
+ }
+
+ while (call->replies) {
+ struct data_blob_list_item *rep = call->replies;
+ struct dcesrv_sock_reply_state *substate;
+ struct tevent_req *subreq;
+
+ substate = talloc_zero(call, struct dcesrv_sock_reply_state);
+ if (!substate) {
+ dcesrv_terminate_connection(dce_conn, "no memory");
+ return;
+ }
+
+ substate->dce_conn = dce_conn;
+ substate->call = NULL;
+
+ DLIST_REMOVE(call->replies, rep);
+
+ if (call->replies == NULL && call->terminate_reason == NULL) {
+ substate->call = call;
+ }
+
+ substate->iov.iov_base = (void *) rep->blob.data;
+ substate->iov.iov_len = rep->blob.length;
+
+ subreq = tstream_writev_queue_send(substate,
+ dce_conn->event_ctx,
+ dce_conn->stream,
+ dce_conn->send_queue,
+ &substate->iov, 1);
+ if (!subreq) {
+ dcesrv_terminate_connection(dce_conn, "no memory");
+ return;
+ }
+ tevent_req_set_callback(subreq, dcesrv_sock_reply_done,
+ substate);
+ }
+
+ if (call->terminate_reason != NULL) {
+ struct tevent_req *subreq;
+
+ subreq = tevent_queue_wait_send(call,
+ dce_conn->event_ctx,
+ dce_conn->send_queue);
+ if (!subreq) {
+ dcesrv_terminate_connection(dce_conn, __location__);
+ return;
+ }
+ tevent_req_set_callback(subreq, dcesrv_call_terminate_step1,
+ call);
+ }
+
+ DLIST_REMOVE(call->conn->call_list, call);
+ call->list = DCESRV_LIST_NONE;
+}
+
+static void dcesrv_sock_reply_done(struct tevent_req *subreq)
+{
+ struct dcesrv_sock_reply_state *substate = tevent_req_callback_data(subreq,
+ struct dcesrv_sock_reply_state);
+ int ret;
+ int sys_errno;
+ NTSTATUS status;
+ struct dcesrv_call_state *call = substate->call;
+
+ ret = tstream_writev_queue_recv(subreq, &sys_errno);
+ TALLOC_FREE(subreq);
+ if (ret == -1) {
+ status = map_nt_error_from_unix_common(sys_errno);
+ dcesrv_terminate_connection(substate->dce_conn, nt_errstr(status));
+ return;
+ }
+
+ talloc_free(substate);
+ if (call) {
+ talloc_free(call);
+ }
+}
+
+static void dcesrv_call_terminate_step2(struct tevent_req *subreq);
+
+static void dcesrv_call_terminate_step1(struct tevent_req *subreq)
+{
+ struct dcesrv_call_state *call = tevent_req_callback_data(subreq,
+ struct dcesrv_call_state);
+ bool ok;
+ struct timeval tv;
+
+ /* make sure we stop send queue before removing subreq */
+ tevent_queue_stop(call->conn->send_queue);
+
+ ok = tevent_queue_wait_recv(subreq);
+ TALLOC_FREE(subreq);
+ if (!ok) {
+ dcesrv_terminate_connection(call->conn, __location__);
+ return;
+ }
+
+ /* disconnect after 200 usecs */
+ tv = timeval_current_ofs_usec(200);
+ subreq = tevent_wakeup_send(call, call->conn->event_ctx, tv);
+ if (subreq == NULL) {
+ dcesrv_terminate_connection(call->conn, __location__);
+ return;
+ }
+ tevent_req_set_callback(subreq, dcesrv_call_terminate_step2,
+ call);
+}
+
+static void dcesrv_call_terminate_step2(struct tevent_req *subreq)
+{
+ struct dcesrv_call_state *call = tevent_req_callback_data(subreq,
+ struct dcesrv_call_state);
+ bool ok;
+
+ ok = tevent_wakeup_recv(subreq);
+ TALLOC_FREE(subreq);
+ if (!ok) {
+ dcesrv_terminate_connection(call->conn, __location__);
+ return;
+ }
+
+ dcesrv_terminate_connection(call->conn, call->terminate_reason);
+}
+
+static void dcesrv_conn_wait_done(struct tevent_req *subreq);
+
+static void dcesrv_read_fragment_done(struct tevent_req *subreq)
+{
+ struct dcesrv_connection *dce_conn = tevent_req_callback_data(subreq,
+ struct dcesrv_connection);
+ struct dcesrv_context *dce_ctx = dce_conn->dce_ctx;
+ struct ncacn_packet *pkt;
+ DATA_BLOB buffer;
+ NTSTATUS status;
+
+ if (dce_conn->terminate) {
+ /*
+ * if the current connection is broken
+ * we need to clean it up before any other connection
+ */
+ dcesrv_terminate_connection(dce_conn, dce_conn->terminate);
+ dcesrv_cleanup_broken_connections(dce_ctx);
+ return;
+ }
+
+ dcesrv_cleanup_broken_connections(dce_ctx);
+
+ status = dcerpc_read_ncacn_packet_recv(subreq, dce_conn,
+ &pkt, &buffer);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ dcesrv_terminate_connection(dce_conn, nt_errstr(status));
+ return;
+ }
+
+ status = dcesrv_process_ncacn_packet(dce_conn, pkt, buffer);
+ if (!NT_STATUS_IS_OK(status)) {
+ dcesrv_terminate_connection(dce_conn, nt_errstr(status));
+ return;
+ }
+
+ /*
+ * This is used to block the connection during
+ * pending authentication.
+ */
+ if (dce_conn->wait_send != NULL) {
+ subreq = dce_conn->wait_send(dce_conn,
+ dce_conn->event_ctx,
+ dce_conn->wait_private);
+ if (!subreq) {
+ status = NT_STATUS_NO_MEMORY;
+ dcesrv_terminate_connection(dce_conn, nt_errstr(status));
+ return;
+ }
+ tevent_req_set_callback(subreq, dcesrv_conn_wait_done, dce_conn);
+ return;
+ }
+
+ subreq = dcerpc_read_ncacn_packet_send(dce_conn,
+ dce_conn->event_ctx,
+ dce_conn->stream);
+ if (!subreq) {
+ status = NT_STATUS_NO_MEMORY;
+ dcesrv_terminate_connection(dce_conn, nt_errstr(status));
+ return;
+ }
+ tevent_req_set_callback(subreq, dcesrv_read_fragment_done, dce_conn);
+}
+
+static void dcesrv_conn_wait_done(struct tevent_req *subreq)
+{
+ struct dcesrv_connection *dce_conn = tevent_req_callback_data(subreq,
+ struct dcesrv_connection);
+ struct dcesrv_context *dce_ctx = dce_conn->dce_ctx;
+ NTSTATUS status;
+
+ if (dce_conn->terminate) {
+ /*
+ * if the current connection is broken
+ * we need to clean it up before any other connection
+ */
+ dcesrv_terminate_connection(dce_conn, dce_conn->terminate);
+ dcesrv_cleanup_broken_connections(dce_ctx);
+ return;
+ }
+
+ dcesrv_cleanup_broken_connections(dce_ctx);
+
+ status = dce_conn->wait_recv(subreq);
+ dce_conn->wait_send = NULL;
+ dce_conn->wait_recv = NULL;
+ dce_conn->wait_private = NULL;
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ dcesrv_terminate_connection(dce_conn, nt_errstr(status));
+ return;
+ }
+
+ status = dcesrv_connection_loop_start(dce_conn);
+ if (!NT_STATUS_IS_OK(status)) {
+ dcesrv_terminate_connection(dce_conn, nt_errstr(status));
+ return;
+ }
+}
+
+/**
+ * retrieve credentials from a dce_call
+ */
+_PUBLIC_ struct cli_credentials *dcesrv_call_credentials(struct dcesrv_call_state *dce_call)
+{
+ struct dcesrv_auth *auth = dce_call->auth_state;
+ SMB_ASSERT(auth->auth_finished);
+ return auth->session_info->credentials;
+}
+
+/**
+ * returns true if this is an authenticated call
+ */
+_PUBLIC_ bool dcesrv_call_authenticated(struct dcesrv_call_state *dce_call)
+{
+ struct dcesrv_auth *auth = dce_call->auth_state;
+ enum security_user_level level;
+ SMB_ASSERT(auth->auth_finished);
+ level = security_session_user_level(auth->session_info, NULL);
+ return level >= SECURITY_USER;
+}
+
+/**
+ * retrieve account_name for a dce_call
+ */
+_PUBLIC_ const char *dcesrv_call_account_name(struct dcesrv_call_state *dce_call)
+{
+ struct dcesrv_auth *auth = dce_call->auth_state;
+ SMB_ASSERT(auth->auth_finished);
+ return auth->session_info->info->account_name;
+}
+
+/**
+ * retrieve session_info from a dce_call
+ */
+_PUBLIC_ struct auth_session_info *dcesrv_call_session_info(struct dcesrv_call_state *dce_call)
+{
+ struct dcesrv_auth *auth = dce_call->auth_state;
+ SMB_ASSERT(auth->auth_finished);
+ return auth->session_info;
+}
+
+/**
+ * retrieve auth type/level from a dce_call
+ */
+_PUBLIC_ void dcesrv_call_auth_info(struct dcesrv_call_state *dce_call,
+ enum dcerpc_AuthType *auth_type,
+ enum dcerpc_AuthLevel *auth_level)
+{
+ struct dcesrv_auth *auth = dce_call->auth_state;
+
+ SMB_ASSERT(auth->auth_finished);
+
+ if (auth_type != NULL) {
+ *auth_type = auth->auth_type;
+ }
+ if (auth_level != NULL) {
+ *auth_level = auth->auth_level;
+ }
+}
+
+_PUBLIC_ NTSTATUS dcesrv_connection_loop_start(struct dcesrv_connection *conn)
+{
+ struct tevent_req *subreq;
+
+ subreq = dcerpc_read_ncacn_packet_send(conn,
+ conn->event_ctx,
+ conn->stream);
+ if (subreq == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ tevent_req_set_callback(subreq, dcesrv_read_fragment_done, conn);
+
+ return NT_STATUS_OK;
+}
#include "auth/auth.h"
#include "auth/gensec/gensec.h"
#include "auth/credentials/credentials.h"
-#include "lib/util/dlinklist.h"
#include "rpc_server/dcerpc_server.h"
#include "rpc_server/dcerpc_server_proto.h"
-#include "system/filesys.h"
-#include "libcli/security/security.h"
#include "param/param.h"
-#include "lib/tsocket/tsocket.h"
-#include "libcli/named_pipe_auth/npa_tstream.h"
#include "smbd/service_stream.h"
#include "lib/tsocket/tsocket.h"
#include "lib/socket/socket.h"
#include "smbd/process_model.h"
-#include "lib/messaging/irpc.h"
-#include "librpc/rpc/rpc_common.h"
#include "lib/util/samba_modules.h"
-#include "librpc/gen_ndr/ndr_dcerpc.h"
#include "lib/util/tevent_ntstatus.h"
-static NTSTATUS dcesrv_negotiate_contexts(struct dcesrv_call_state *call,
- const struct dcerpc_bind *b,
- struct dcerpc_ack_ctx *ack_ctx_list);
-
/*
take a reference to an existing association group
*/
return NULL;
}
- return talloc_reference(conn, assoc_group);
-}
-
-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) {
- DEBUG(0,(__location__ ": Failed to remove assoc_group 0x%08x\n",
- assoc_group->id));
- }
- return 0;
-}
-
-/*
- allocate a new association group
- */
-static struct dcesrv_assoc_group *dcesrv_assoc_group_new(struct dcesrv_connection *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;
- int id;
-
- assoc_group = talloc_zero(conn, struct dcesrv_assoc_group);
- if (assoc_group == NULL) {
- return NULL;
- }
-
- id = idr_get_new_random(dce_ctx->assoc_groups_idr, assoc_group, UINT16_MAX);
- if (id == -1) {
- talloc_free(assoc_group);
- DEBUG(0,(__location__ ": Out of association groups!\n"));
- return NULL;
- }
-
- assoc_group->transport = transport;
- assoc_group->id = id;
- assoc_group->dce_ctx = dce_ctx;
-
- talloc_set_destructor(assoc_group, dcesrv_assoc_group_destructor);
-
- return assoc_group;
-}
-
-NTSTATUS dcesrv_assoc_group_find(struct dcesrv_call_state *call)
-{
- /*
- if provided, check the assoc_group is valid
- */
- if (call->pkt.u.bind.assoc_group_id != 0) {
- call->conn->assoc_group =
- dcesrv_assoc_group_reference(call->conn,
- call->pkt.u.bind.assoc_group_id);
- } else {
- call->conn->assoc_group = dcesrv_assoc_group_new(call->conn);
- }
-
- /*
- * The NETLOGON server does not use handles and so
- * there is no need to support association groups, but
- * we need to give back a number regardless.
- *
- * We have to do this when it is not run as a single process,
- * because then it can't see the other valid association
- * groups. We handle this genericly for all endpoints not
- * running in single process mode.
- *
- * We know which endpoint we are on even before checking the
- * iface UUID, so for simplicity we enforce the same policy
- * for all interfaces on the endpoint.
- *
- * This means that where NETLOGON
- * shares an endpoint (such as ncalrpc or of 'lsa over
- * netlogon' is set) we will still check association groups.
- *
- */
-
- if (call->conn->assoc_group == NULL &&
- !call->conn->endpoint->use_single_process) {
- call->conn->assoc_group
- = dcesrv_assoc_group_new(call->conn);
- }
-
- if (call->conn->assoc_group == NULL) {
- /* TODO Return correct status */
- return NT_STATUS_UNSUCCESSFUL;
- }
-
- return NT_STATUS_OK;
-}
-
-/*
- see if two endpoints match
-*/
-static bool endpoints_match(const struct dcerpc_binding *ep1,
- const struct dcerpc_binding *ep2)
-{
- enum dcerpc_transport_t t1;
- enum dcerpc_transport_t t2;
- const char *e1;
- const char *e2;
-
- t1 = dcerpc_binding_get_transport(ep1);
- t2 = dcerpc_binding_get_transport(ep2);
-
- e1 = dcerpc_binding_get_string_option(ep1, "endpoint");
- e2 = dcerpc_binding_get_string_option(ep2, "endpoint");
-
- if (t1 != t2) {
- return false;
- }
-
- if (!e1 || !e2) {
- return e1 == e2;
- }
-
- if (strcasecmp(e1, e2) != 0) {
- return false;
- }
-
- return true;
-}
-
-/*
- find an endpoint in the dcesrv_context
-*/
-static struct dcesrv_endpoint *find_endpoint(struct dcesrv_context *dce_ctx,
- const struct dcerpc_binding *ep_description)
-{
- struct dcesrv_endpoint *ep;
- for (ep=dce_ctx->endpoint_list; ep; ep=ep->next) {
- if (endpoints_match(ep->ep_description, ep_description)) {
- return ep;
- }
- }
- return NULL;
-}
-
-/*
- find a registered context_id from a bind or alter_context
-*/
-static struct dcesrv_connection_context *dcesrv_find_context(struct dcesrv_connection *conn,
- uint16_t context_id)
-{
- struct dcesrv_connection_context *c;
- for (c=conn->contexts;c;c=c->next) {
- if (c->context_id == context_id) return c;
- }
- return NULL;
-}
-
-/*
- see if a uuid and if_version match to an interface
-*/
-static bool interface_match(const struct dcesrv_interface *if1,
- const struct dcesrv_interface *if2)
-{
- return (if1->syntax_id.if_version == if2->syntax_id.if_version &&
- GUID_equal(&if1->syntax_id.uuid, &if2->syntax_id.uuid));
-}
-
-/*
- find the interface operations on any endpoint with this binding
-*/
-static const struct dcesrv_interface *find_interface_by_binding(struct dcesrv_context *dce_ctx,
- struct dcerpc_binding *binding,
- const struct dcesrv_interface *iface)
-{
- struct dcesrv_endpoint *ep;
- for (ep=dce_ctx->endpoint_list; ep; ep=ep->next) {
- if (endpoints_match(ep->ep_description, binding)) {
- struct dcesrv_if_list *ifl;
- for (ifl=ep->interface_list; ifl; ifl=ifl->next) {
- if (interface_match(&(ifl->iface), iface)) {
- return &(ifl->iface);
- }
- }
- }
- }
- return NULL;
-}
-
-/*
- see if a uuid and if_version match to an interface
-*/
-static bool interface_match_by_uuid(const struct dcesrv_interface *iface,
- const struct GUID *uuid, uint32_t if_version)
-{
- return (iface->syntax_id.if_version == if_version &&
- GUID_equal(&iface->syntax_id.uuid, uuid));
-}
-
-/*
- find the interface operations on an endpoint by uuid
-*/
-const struct dcesrv_interface *find_interface_by_uuid(const struct dcesrv_endpoint *endpoint,
- const struct GUID *uuid, uint32_t if_version)
-{
- struct dcesrv_if_list *ifl;
- for (ifl=endpoint->interface_list; ifl; ifl=ifl->next) {
- if (interface_match_by_uuid(&(ifl->iface), uuid, if_version)) {
- return &(ifl->iface);
- }
- }
- return NULL;
-}
-
-/*
- find the earlier parts of a fragmented call awaiting reassembily
-*/
-static struct dcesrv_call_state *dcesrv_find_fragmented_call(struct dcesrv_connection *dce_conn, uint32_t call_id)
-{
- struct dcesrv_call_state *c;
- for (c=dce_conn->incoming_fragmented_call_list;c;c=c->next) {
- if (c->pkt.call_id == call_id) {
- return c;
- }
- }
- return NULL;
-}
-
-/*
- register an interface on an endpoint
-
- An endpoint is one unix domain socket (for ncalrpc), one TCP port
- (for ncacn_ip_tcp) or one (forwarded) named pipe (for ncacn_np).
-
- Each endpoint can have many interfaces such as netlogon, lsa or
- samr. Some have essentially the full set.
-
- This is driven from the set of interfaces listed in each IDL file
- via the PIDL generated *__op_init_server() functions.
-*/
-_PUBLIC_ NTSTATUS dcesrv_interface_register(struct dcesrv_context *dce_ctx,
- const char *ep_name,
- const char *ncacn_np_secondary_endpoint,
- const struct dcesrv_interface *iface,
- const struct security_descriptor *sd)
-{
- struct dcesrv_endpoint *ep;
- struct dcesrv_if_list *ifl;
- struct dcerpc_binding *binding;
- struct dcerpc_binding *binding2 = NULL;
- bool add_ep = false;
- NTSTATUS status;
- enum dcerpc_transport_t transport;
- char *ep_string = NULL;
- bool use_single_process = true;
- const char *ep_process_string;
-
- /*
- * If we are not using handles, there is no need for force
- * this service into using a single process.
- *
- * However, due to the way we listen for RPC packets, we can
- * only do this if we have a single service per pipe or TCP
- * port, so we still force a single combined process for
- * ncalrpc.
- */
- if (iface->flags & DCESRV_INTERFACE_FLAGS_HANDLES_NOT_USED) {
- use_single_process = false;
- }
-
- status = dcerpc_parse_binding(dce_ctx, ep_name, &binding);
-
- if (NT_STATUS_IS_ERR(status)) {
- DEBUG(0, ("Trouble parsing binding string '%s'\n", ep_name));
- return status;
- }
-
- transport = dcerpc_binding_get_transport(binding);
- if (transport == NCACN_IP_TCP) {
- int port;
- char port_str[6];
-
- /*
- * First check if there is already a port specified, eg
- * for epmapper on ncacn_ip_tcp:[135]
- */
- const char *endpoint
- = dcerpc_binding_get_string_option(binding,
- "endpoint");
- if (endpoint == NULL) {
- port = lpcfg_parm_int(dce_ctx->lp_ctx, NULL,
- "rpc server port", iface->name, 0);
-
- /*
- * For RPC services that are not set to use a single
- * process, we do not default to using the 'rpc server
- * port' because that would cause a double-bind on
- * that port.
- */
- if (port == 0 && !use_single_process) {
- port = lpcfg_rpc_server_port(dce_ctx->lp_ctx);
- }
- if (port != 0) {
- snprintf(port_str, sizeof(port_str), "%u", port);
- status = dcerpc_binding_set_string_option(binding,
- "endpoint",
- port_str);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
- }
- }
- }
-
- if (transport == NCACN_NP && ncacn_np_secondary_endpoint != NULL) {
- enum dcerpc_transport_t transport2;
-
- status = dcerpc_parse_binding(dce_ctx,
- ncacn_np_secondary_endpoint,
- &binding2);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Trouble parsing 2nd binding string '%s'\n",
- ncacn_np_secondary_endpoint));
- return status;
- }
-
- transport2 = dcerpc_binding_get_transport(binding2);
- SMB_ASSERT(transport2 == transport);
- }
-
- /* see if the interface is already registered on the endpoint */
- if (find_interface_by_binding(dce_ctx, binding, iface)!=NULL) {
- DEBUG(0,("dcesrv_interface_register: interface '%s' already registered on endpoint '%s'\n",
- iface->name, ep_name));
- return NT_STATUS_OBJECT_NAME_COLLISION;
- }
-
- /* check if this endpoint exists
- */
- ep = find_endpoint(dce_ctx, binding);
-
- if (ep != NULL) {
- /*
- * We want a new port on ncacn_ip_tcp for NETLOGON, so
- * it can be multi-process. Other processes can also
- * listen on distinct ports, if they have one forced
- * in the code above with eg 'rpc server port:drsuapi = 1027'
- *
- * If we have mulitiple endpoints on port 0, they each
- * get an epemeral port (currently by walking up from
- * 1024).
- *
- * Because one endpoint can only have one process
- * model, we add a new IP_TCP endpoint for each model.
- *
- * This works in conjunction with the forced overwrite
- * of ep->use_single_process below.
- */
- if (ep->use_single_process != use_single_process
- && transport == NCACN_IP_TCP) {
- add_ep = true;
- }
- }
-
- if (ep == NULL || add_ep) {
- ep = talloc_zero(dce_ctx, struct dcesrv_endpoint);
- if (!ep) {
- return NT_STATUS_NO_MEMORY;
- }
- ZERO_STRUCTP(ep);
- ep->ep_description = talloc_move(ep, &binding);
- ep->ep_2nd_description = talloc_move(ep, &binding2);
- add_ep = true;
-
- /* add mgmt interface */
- ifl = talloc_zero(ep, struct dcesrv_if_list);
- if (!ifl) {
- return NT_STATUS_NO_MEMORY;
- }
-
- ifl->iface = dcesrv_get_mgmt_interface();
-
- DLIST_ADD(ep->interface_list, ifl);
- }
-
- /*
- * By default don't force into a single process, but if any
- * interface on this endpoint on this service uses handles
- * (most do), then we must force into single process mode
- *
- * By overwriting this each time a new interface is added to
- * this endpoint, we end up with the most restrictive setting.
- */
- if (use_single_process) {
- ep->use_single_process = true;
- }
-
- /* talloc a new interface list element */
- ifl = talloc_zero(ep, struct dcesrv_if_list);
- if (!ifl) {
- return NT_STATUS_NO_MEMORY;
- }
-
- /* copy the given interface struct to the one on the endpoints interface list */
- memcpy(&(ifl->iface),iface, sizeof(struct dcesrv_interface));
-
- /* if we have a security descriptor given,
- * we should see if we can set it up on the endpoint
- */
- if (sd != NULL) {
- /* if there's currently no security descriptor given on the endpoint
- * we try to set it
- */
- if (ep->sd == NULL) {
- ep->sd = security_descriptor_copy(ep, sd);
- }
-
- /* if now there's no security descriptor given on the endpoint
- * something goes wrong, either we failed to copy the security descriptor
- * or there was already one on the endpoint
- */
- if (ep->sd != NULL) {
- DEBUG(0,("dcesrv_interface_register: interface '%s' failed to setup a security descriptor\n"
- " on endpoint '%s'\n",
- iface->name, ep_name));
- if (add_ep) free(ep);
- free(ifl);
- return NT_STATUS_OBJECT_NAME_COLLISION;
- }
- }
-
- /* finally add the interface on the endpoint */
- DLIST_ADD(ep->interface_list, ifl);
-
- /* if it's a new endpoint add it to the dcesrv_context */
- if (add_ep) {
- DLIST_ADD(dce_ctx->endpoint_list, ep);
- }
-
- /* Re-get the string as we may have set a port */
- ep_string = dcerpc_binding_string(dce_ctx, ep->ep_description);
-
- if (use_single_process) {
- ep_process_string = "single process required";
- } else {
- ep_process_string = "multi process compatible";
- }
-
- DBG_INFO("Interface '%s' registered on endpoint '%s' (%s)\n",
- iface->name, ep_string, ep_process_string);
- TALLOC_FREE(ep_string);
-
- return NT_STATUS_OK;
-}
-
-static NTSTATUS dcesrv_session_info_session_key(struct dcesrv_auth *auth,
- DATA_BLOB *session_key)
-{
- if (auth->session_info == NULL) {
- return NT_STATUS_NO_USER_SESSION_KEY;
- }
-
- if (auth->session_info->session_key.length == 0) {
- return NT_STATUS_NO_USER_SESSION_KEY;
- }
-
- *session_key = auth->session_info->session_key;
- return NT_STATUS_OK;
-}
-
-static NTSTATUS dcesrv_remote_session_key(struct dcesrv_auth *auth,
- DATA_BLOB *session_key)
-{
- if (auth->auth_type != DCERPC_AUTH_TYPE_NONE) {
- return NT_STATUS_NO_USER_SESSION_KEY;
- }
-
- return dcesrv_session_info_session_key(auth, session_key);
-}
-
-static NTSTATUS dcesrv_local_fixed_session_key(struct dcesrv_auth *auth,
- DATA_BLOB *session_key)
-{
- return dcerpc_generic_session_key(session_key);
-}
-
-/*
- * Fetch the authentication session key if available.
- *
- * This is the key generated by a gensec authentication.
- *
- */
-_PUBLIC_ NTSTATUS dcesrv_auth_session_key(struct dcesrv_call_state *call,
- DATA_BLOB *session_key)
-{
- struct dcesrv_auth *auth = call->auth_state;
- SMB_ASSERT(auth->auth_finished);
- return dcesrv_session_info_session_key(auth, session_key);
-}
-
-/*
- * Fetch the transport session key if available.
- * Typically this is the SMB session key
- * or a fixed key for local transports.
- *
- * The key is always truncated to 16 bytes.
-*/
-_PUBLIC_ NTSTATUS dcesrv_transport_session_key(struct dcesrv_call_state *call,
- DATA_BLOB *session_key)
-{
- struct dcesrv_auth *auth = call->auth_state;
- NTSTATUS status;
-
- SMB_ASSERT(auth->auth_finished);
-
- if (auth->session_key_fn == NULL) {
- return NT_STATUS_NO_USER_SESSION_KEY;
- }
-
- status = auth->session_key_fn(auth, session_key);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- session_key->length = MIN(session_key->length, 16);
-
- return NT_STATUS_OK;
-}
-
-static struct dcesrv_auth *dcesrv_auth_create(struct dcesrv_connection *conn)
-{
- const struct dcesrv_endpoint *ep = conn->endpoint;
- enum dcerpc_transport_t transport =
- dcerpc_binding_get_transport(ep->ep_description);
- struct dcesrv_auth *auth = NULL;
-
- auth = talloc_zero(conn, struct dcesrv_auth);
- if (auth == NULL) {
- return NULL;
- }
-
- switch (transport) {
- case NCACN_NP:
- auth->session_key_fn = dcesrv_remote_session_key;
- break;
- case NCALRPC:
- case NCACN_UNIX_STREAM:
- auth->session_key_fn = dcesrv_local_fixed_session_key;
- break;
- default:
- /*
- * All other's get a NULL pointer, which
- * results in NT_STATUS_NO_USER_SESSION_KEY
- */
- break;
- }
-
- return auth;
-}
-
-/*
- connect to a dcerpc endpoint
-*/
-_PUBLIC_ NTSTATUS dcesrv_endpoint_connect(struct dcesrv_context *dce_ctx,
- TALLOC_CTX *mem_ctx,
- const struct dcesrv_endpoint *ep,
- struct auth_session_info *session_info,
- struct tevent_context *event_ctx,
- uint32_t state_flags,
- struct dcesrv_connection **_p)
-{
- struct dcesrv_auth *auth = NULL;
- struct dcesrv_connection *p;
-
- if (!session_info) {
- return NT_STATUS_ACCESS_DENIED;
- }
-
- p = talloc_zero(mem_ctx, struct dcesrv_connection);
- NT_STATUS_HAVE_NO_MEMORY(p);
-
- p->dce_ctx = dce_ctx;
- p->endpoint = ep;
- p->packet_log_dir = lpcfg_lock_directory(dce_ctx->lp_ctx);
- p->event_ctx = event_ctx;
- p->state_flags = state_flags;
- p->allow_bind = true;
- p->max_recv_frag = 5840;
- p->max_xmit_frag = 5840;
- p->max_total_request_size = DCERPC_NCACN_REQUEST_DEFAULT_MAX_SIZE;
-
- p->support_hdr_signing = lpcfg_parm_bool(dce_ctx->lp_ctx,
- NULL,
- "dcesrv",
- "header signing",
- true);
- p->max_auth_states = lpcfg_parm_ulong(dce_ctx->lp_ctx,
- NULL,
- "dcesrv",
- "max auth states",
- 2049);
-
- auth = dcesrv_auth_create(p);
- if (auth == NULL) {
- talloc_free(p);
- return NT_STATUS_NO_MEMORY;
- }
-
- auth->session_info = talloc_reference(auth, session_info);
- if (auth->session_info == NULL) {
- talloc_free(p);
- return NT_STATUS_NO_MEMORY;
- }
-
- p->default_auth_state = auth;
-
- /*
- * For now we only support NDR32.
- */
- p->preferred_transfer = &ndr_transfer_syntax_ndr;
-
- *_p = p;
- return NT_STATUS_OK;
-}
-
-/*
- move a call from an existing linked list to the specified list. This
- prevents bugs where we forget to remove the call from a previous
- list when moving it.
- */
-static void dcesrv_call_set_list(struct dcesrv_call_state *call,
- enum dcesrv_call_list list)
-{
- switch (call->list) {
- case DCESRV_LIST_NONE:
- break;
- case DCESRV_LIST_CALL_LIST:
- DLIST_REMOVE(call->conn->call_list, call);
- break;
- case DCESRV_LIST_FRAGMENTED_CALL_LIST:
- DLIST_REMOVE(call->conn->incoming_fragmented_call_list, call);
- break;
- case DCESRV_LIST_PENDING_CALL_LIST:
- DLIST_REMOVE(call->conn->pending_call_list, call);
- break;
- }
- call->list = list;
- switch (list) {
- case DCESRV_LIST_NONE:
- break;
- case DCESRV_LIST_CALL_LIST:
- DLIST_ADD_END(call->conn->call_list, call);
- break;
- case DCESRV_LIST_FRAGMENTED_CALL_LIST:
- DLIST_ADD_END(call->conn->incoming_fragmented_call_list, call);
- break;
- case DCESRV_LIST_PENDING_CALL_LIST:
- DLIST_ADD_END(call->conn->pending_call_list, call);
- break;
- }
-}
-
-static void dcesrv_call_disconnect_after(struct dcesrv_call_state *call,
- const char *reason)
-{
- struct dcesrv_auth *a = NULL;
-
- if (call->conn->terminate != NULL) {
- return;
- }
-
- call->conn->allow_bind = false;
- call->conn->allow_alter = false;
-
- call->conn->default_auth_state->auth_invalid = true;
-
- for (a = call->conn->auth_states; a != NULL; a = a->next) {
- a->auth_invalid = true;
- }
-
- call->terminate_reason = talloc_strdup(call, reason);
- if (call->terminate_reason == NULL) {
- call->terminate_reason = __location__;
- }
-}
-
-/*
- return a dcerpc bind_nak
-*/
-static NTSTATUS dcesrv_bind_nak(struct dcesrv_call_state *call, uint32_t reason)
-{
- struct ncacn_packet pkt;
- struct dcerpc_bind_nak_version version;
- struct data_blob_list_item *rep;
- NTSTATUS status;
- static const uint8_t _pad[3] = { 0, };
-
- /*
- * We add the call to the pending_call_list
- * in order to defer the termination.
- */
- dcesrv_call_disconnect_after(call, "dcesrv_bind_nak");
-
- /* setup a bind_nak */
- dcesrv_init_hdr(&pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx));
- pkt.auth_length = 0;
- pkt.call_id = call->pkt.call_id;
- pkt.ptype = DCERPC_PKT_BIND_NAK;
- pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
- pkt.u.bind_nak.reject_reason = reason;
- version.rpc_vers = 5;
- version.rpc_vers_minor = 0;
- pkt.u.bind_nak.num_versions = 1;
- pkt.u.bind_nak.versions = &version;
- pkt.u.bind_nak._pad = data_blob_const(_pad, sizeof(_pad));
-
- rep = talloc_zero(call, struct data_blob_list_item);
- if (!rep) {
- return NT_STATUS_NO_MEMORY;
- }
-
- status = dcerpc_ncacn_push_auth(&rep->blob, call, &pkt, NULL);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- dcerpc_set_frag_length(&rep->blob, rep->blob.length);
-
- DLIST_ADD_END(call->replies, rep);
- dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST);
-
- if (call->conn->call_list && call->conn->call_list->replies) {
- if (call->conn->transport.report_output_data) {
- call->conn->transport.report_output_data(call->conn);
- }
- }
-
- return NT_STATUS_OK;
-}
-
-static NTSTATUS dcesrv_fault_disconnect(struct dcesrv_call_state *call,
- uint32_t fault_code)
-{
- /*
- * We add the call to the pending_call_list
- * in order to defer the termination.
- */
- dcesrv_call_disconnect_after(call, "dcesrv_fault_disconnect");
-
- return dcesrv_fault_with_flags(call, fault_code,
- DCERPC_PFC_FLAG_DID_NOT_EXECUTE);
-}
-
-static int dcesrv_connection_context_destructor(struct dcesrv_connection_context *c)
-{
- DLIST_REMOVE(c->conn->contexts, c);
-
- if (c->iface && c->iface->unbind) {
- c->iface->unbind(c, c->iface);
- c->iface = NULL;
- }
-
- return 0;
-}
-
-static void dcesrv_prepare_context_auth(struct dcesrv_call_state *dce_call)
-{
- struct loadparm_context *lp_ctx = dce_call->conn->dce_ctx->lp_ctx;
- const struct dcesrv_endpoint *endpoint = dce_call->conn->endpoint;
- enum dcerpc_transport_t transport =
- dcerpc_binding_get_transport(endpoint->ep_description);
- struct dcesrv_connection_context *context = dce_call->context;
- const struct dcesrv_interface *iface = context->iface;
-
- context->min_auth_level = DCERPC_AUTH_LEVEL_NONE;
-
- if (transport == NCALRPC) {
- context->allow_connect = true;
- return;
- }
-
- /*
- * allow overwrite per interface
- * allow dcerpc auth level connect:<interface>
- */
- context->allow_connect = lpcfg_allow_dcerpc_auth_level_connect(lp_ctx);
- context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL,
- "allow dcerpc auth level connect",
- iface->name,
- context->allow_connect);
-}
-
-NTSTATUS dcesrv_interface_bind_require_integrity(struct dcesrv_connection_context *context,
- const struct dcesrv_interface *iface)
-{
- /*
- * For connection oriented DCERPC DCERPC_AUTH_LEVEL_PACKET (4)
- * has the same behavior as DCERPC_AUTH_LEVEL_INTEGRITY (5).
- */
- context->min_auth_level = DCERPC_AUTH_LEVEL_PACKET;
- return NT_STATUS_OK;
-}
-
-NTSTATUS dcesrv_interface_bind_require_privacy(struct dcesrv_connection_context *context,
- const struct dcesrv_interface *iface)
-{
- context->min_auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
- return NT_STATUS_OK;
-}
-
-_PUBLIC_ NTSTATUS dcesrv_interface_bind_reject_connect(struct dcesrv_connection_context *context,
- const struct dcesrv_interface *iface)
-{
- struct loadparm_context *lp_ctx = context->conn->dce_ctx->lp_ctx;
- const struct dcesrv_endpoint *endpoint = context->conn->endpoint;
- enum dcerpc_transport_t transport =
- dcerpc_binding_get_transport(endpoint->ep_description);
-
- if (transport == NCALRPC) {
- context->allow_connect = true;
- return NT_STATUS_OK;
- }
-
- /*
- * allow overwrite per interface
- * allow dcerpc auth level connect:<interface>
- */
- context->allow_connect = false;
- context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL,
- "allow dcerpc auth level connect",
- iface->name,
- context->allow_connect);
- return NT_STATUS_OK;
-}
-
-_PUBLIC_ NTSTATUS dcesrv_interface_bind_allow_connect(struct dcesrv_connection_context *context,
- const struct dcesrv_interface *iface)
-{
- struct loadparm_context *lp_ctx = context->conn->dce_ctx->lp_ctx;
- const struct dcesrv_endpoint *endpoint = context->conn->endpoint;
- enum dcerpc_transport_t transport =
- dcerpc_binding_get_transport(endpoint->ep_description);
-
- if (transport == NCALRPC) {
- context->allow_connect = true;
- return NT_STATUS_OK;
- }
-
- /*
- * allow overwrite per interface
- * allow dcerpc auth level connect:<interface>
- */
- context->allow_connect = true;
- context->allow_connect = lpcfg_parm_bool(lp_ctx, NULL,
- "allow dcerpc auth level connect",
- iface->name,
- context->allow_connect);
- return NT_STATUS_OK;
-}
-
-struct dcesrv_conn_auth_wait_context {
- struct tevent_req *req;
- bool done;
- NTSTATUS status;
-};
-
-struct dcesrv_conn_auth_wait_state {
- uint8_t dummy;
-};
-
-static struct tevent_req *dcesrv_conn_auth_wait_send(TALLOC_CTX *mem_ctx,
- struct tevent_context *ev,
- void *private_data)
-{
- struct dcesrv_conn_auth_wait_context *auth_wait =
- talloc_get_type_abort(private_data,
- struct dcesrv_conn_auth_wait_context);
- struct tevent_req *req = NULL;
- struct dcesrv_conn_auth_wait_state *state = NULL;
-
- req = tevent_req_create(mem_ctx, &state,
- struct dcesrv_conn_auth_wait_state);
- if (req == NULL) {
- return NULL;
- }
- auth_wait->req = req;
-
- tevent_req_defer_callback(req, ev);
-
- if (!auth_wait->done) {
- return req;
- }
-
- if (tevent_req_nterror(req, auth_wait->status)) {
- return tevent_req_post(req, ev);
- }
-
- tevent_req_done(req);
- return tevent_req_post(req, ev);
-}
-
-static NTSTATUS dcesrv_conn_auth_wait_recv(struct tevent_req *req)
-{
- return tevent_req_simple_recv_ntstatus(req);
-}
-
-static NTSTATUS dcesrv_conn_auth_wait_setup(struct dcesrv_connection *conn)
-{
- struct dcesrv_conn_auth_wait_context *auth_wait = NULL;
-
- if (conn->wait_send != NULL) {
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- auth_wait = talloc_zero(conn, struct dcesrv_conn_auth_wait_context);
- if (auth_wait == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
-
- conn->wait_private = auth_wait;
- conn->wait_send = dcesrv_conn_auth_wait_send;
- conn->wait_recv = dcesrv_conn_auth_wait_recv;
- return NT_STATUS_OK;
-}
-
-static void dcesrv_conn_auth_wait_finished(struct dcesrv_connection *conn,
- NTSTATUS status)
-{
- struct dcesrv_conn_auth_wait_context *auth_wait =
- talloc_get_type_abort(conn->wait_private,
- struct dcesrv_conn_auth_wait_context);
-
- auth_wait->done = true;
- auth_wait->status = status;
-
- if (auth_wait->req == NULL) {
- return;
- }
-
- if (tevent_req_nterror(auth_wait->req, status)) {
- return;
- }
-
- tevent_req_done(auth_wait->req);
-}
-
-static NTSTATUS dcesrv_auth_reply(struct dcesrv_call_state *call);
-
-static void dcesrv_bind_done(struct tevent_req *subreq);
-
-/*
- handle a bind request
-*/
-static NTSTATUS dcesrv_bind(struct dcesrv_call_state *call)
-{
- struct dcesrv_connection *conn = call->conn;
- struct ncacn_packet *pkt = &call->ack_pkt;
- NTSTATUS status;
- uint32_t extra_flags = 0;
- uint16_t max_req = 0;
- uint16_t max_rep = 0;
- struct dcerpc_binding *ep_2nd_description = NULL;
- const char *endpoint = NULL;
- struct dcesrv_auth *auth = call->auth_state;
- struct dcerpc_ack_ctx *ack_ctx_list = NULL;
- struct dcerpc_ack_ctx *ack_features = NULL;
- struct tevent_req *subreq = NULL;
- size_t i;
-
- status = dcerpc_verify_ncacn_packet_header(&call->pkt,
- DCERPC_PKT_BIND,
- call->pkt.u.bind.auth_info.length,
- 0, /* required flags */
- DCERPC_PFC_FLAG_FIRST |
- DCERPC_PFC_FLAG_LAST |
- DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN |
- 0x08 | /* this is not defined, but should be ignored */
- DCERPC_PFC_FLAG_CONC_MPX |
- DCERPC_PFC_FLAG_DID_NOT_EXECUTE |
- DCERPC_PFC_FLAG_MAYBE |
- DCERPC_PFC_FLAG_OBJECT_UUID);
- if (!NT_STATUS_IS_OK(status)) {
- return dcesrv_bind_nak(call,
- DCERPC_BIND_NAK_REASON_PROTOCOL_VERSION_NOT_SUPPORTED);
- }
-
- /* max_recv_frag and max_xmit_frag result always in the same value! */
- max_req = MIN(call->pkt.u.bind.max_xmit_frag,
- call->pkt.u.bind.max_recv_frag);
- /*
- * The values are between 2048 and 5840 tested against Windows 2012R2
- * via ncacn_ip_tcp on port 135.
- */
- max_req = MAX(2048, max_req);
- max_rep = MIN(max_req, call->conn->max_recv_frag);
- /* They are truncated to an 8 byte boundary. */
- max_rep &= 0xFFF8;
-
- /* max_recv_frag and max_xmit_frag result always in the same value! */
- call->conn->max_recv_frag = max_rep;
- call->conn->max_xmit_frag = max_rep;
-
- status = call->conn->dce_ctx->callbacks.assoc_group.find(call);
- if (!NT_STATUS_IS_OK(status)) {
- DBG_NOTICE("Failed to find assoc_group 0x%08x: %s\n",
- call->pkt.u.bind.assoc_group_id, nt_errstr(status));
- return dcesrv_bind_nak(call, 0);
- }
-
- if (call->pkt.u.bind.num_contexts < 1) {
- return dcesrv_bind_nak(call, 0);
- }
-
- ack_ctx_list = talloc_zero_array(call, struct dcerpc_ack_ctx,
- call->pkt.u.bind.num_contexts);
- if (ack_ctx_list == NULL) {
- return dcesrv_bind_nak(call, 0);
- }
-
- /*
- * Set some sane defaults (required by dcesrv_negotiate_contexts()/
- * dcesrv_check_or_create_context()) and do some protocol validation
- * and set sane defaults.
- */
- for (i = 0; i < call->pkt.u.bind.num_contexts; i++) {
- const struct dcerpc_ctx_list *c = &call->pkt.u.bind.ctx_list[i];
- struct dcerpc_ack_ctx *a = &ack_ctx_list[i];
- bool is_feature = false;
- uint64_t features = 0;
-
- if (c->num_transfer_syntaxes == 0) {
- return dcesrv_bind_nak(call, 0);
- }
-
- a->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION;
- a->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED;
-
- /*
- * It's only treated as bind time feature request, if the first
- * transfer_syntax matches, all others are ignored.
- */
- is_feature = dcerpc_extract_bind_time_features(c->transfer_syntaxes[0],
- &features);
- if (!is_feature) {
- continue;
- }
-
- if (ack_features != NULL) {
- /*
- * Only one bind time feature context is allowed.
- */
- return dcesrv_bind_nak(call, 0);
- }
- ack_features = a;
-
- a->result = DCERPC_BIND_ACK_RESULT_NEGOTIATE_ACK;
- a->reason.negotiate = 0;
- if (features & DCERPC_BIND_TIME_SECURITY_CONTEXT_MULTIPLEXING) {
- if (call->conn->max_auth_states != 0) {
- a->reason.negotiate |=
- DCERPC_BIND_TIME_SECURITY_CONTEXT_MULTIPLEXING;
- }
- }
- if (features & DCERPC_BIND_TIME_KEEP_CONNECTION_ON_ORPHAN) {
- a->reason.negotiate |=
- DCERPC_BIND_TIME_KEEP_CONNECTION_ON_ORPHAN;
- }
-
- call->conn->assoc_group->bind_time_features = a->reason.negotiate;
- }
-
- /*
- * Try to negotiate one new presentation context.
- *
- * Deep in here we locate the iface (by uuid) that the client
- * requested, from the list of interfaces on the
- * call->conn->endpoint, and call iface->bind() on that iface.
- *
- * call->conn was set up at the accept() of the socket, and
- * call->conn->endpoint has a list of interfaces restricted to
- * this port or pipe.
- */
- status = dcesrv_negotiate_contexts(call, &call->pkt.u.bind, ack_ctx_list);
- if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) {
- return dcesrv_bind_nak(call, 0);
- }
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- /*
- * At this point we still don't know which interface (eg
- * netlogon, lsa, drsuapi) the caller requested in this bind!
- * The most recently added context is available as the first
- * element in the linked list at call->conn->contexts, that is
- * call->conn->contexts->iface, but they may not have
- * requested one at all!
- */
-
- if ((call->pkt.pfc_flags & DCERPC_PFC_FLAG_CONC_MPX) &&
- (call->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) {
- call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED;
- extra_flags |= DCERPC_PFC_FLAG_CONC_MPX;
- }
-
- if (call->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) {
- call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL;
- }
-
- /*
- * After finding the interface and setting up the NDR
- * transport negotiation etc, handle any authentication that
- * is being requested.
- */
- if (!dcesrv_auth_bind(call)) {
-
- if (auth->auth_level == DCERPC_AUTH_LEVEL_NONE) {
- /*
- * With DCERPC_AUTH_LEVEL_NONE, we get the
- * reject_reason in auth->auth_context_id.
- */
- return dcesrv_bind_nak(call, auth->auth_context_id);
- }
-
- /*
- * This must a be a temporary failure e.g. talloc or invalid
- * configuration, e.g. no machine account.
- */
- return dcesrv_bind_nak(call,
- DCERPC_BIND_NAK_REASON_TEMPORARY_CONGESTION);
- }
-
- /* setup a bind_ack */
- dcesrv_init_hdr(pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx));
- pkt->auth_length = 0;
- pkt->call_id = call->pkt.call_id;
- pkt->ptype = DCERPC_PKT_BIND_ACK;
- pkt->pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | extra_flags;
- pkt->u.bind_ack.max_xmit_frag = call->conn->max_xmit_frag;
- pkt->u.bind_ack.max_recv_frag = call->conn->max_recv_frag;
- pkt->u.bind_ack.assoc_group_id = call->conn->assoc_group->id;
-
- ep_2nd_description = call->conn->endpoint->ep_2nd_description;
- if (ep_2nd_description == NULL) {
- ep_2nd_description = call->conn->endpoint->ep_description;
- }
-
- endpoint = dcerpc_binding_get_string_option(
- ep_2nd_description,
- "endpoint");
- if (endpoint == NULL) {
- endpoint = "";
- }
-
- pkt->u.bind_ack.secondary_address = endpoint;
- pkt->u.bind_ack.num_results = call->pkt.u.bind.num_contexts;
- pkt->u.bind_ack.ctx_list = ack_ctx_list;
- pkt->u.bind_ack.auth_info = data_blob_null;
-
- status = dcesrv_auth_prepare_bind_ack(call, pkt);
- if (!NT_STATUS_IS_OK(status)) {
- return dcesrv_bind_nak(call, 0);
- }
-
- if (auth->auth_finished) {
- return dcesrv_auth_reply(call);
- }
-
- subreq = gensec_update_send(call, call->event_ctx,
- auth->gensec_security,
- call->in_auth_info.credentials);
- if (subreq == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
- tevent_req_set_callback(subreq, dcesrv_bind_done, call);
-
- return dcesrv_conn_auth_wait_setup(conn);
-}
-
-static void dcesrv_bind_done(struct tevent_req *subreq)
-{
- struct dcesrv_call_state *call =
- tevent_req_callback_data(subreq,
- struct dcesrv_call_state);
- struct dcesrv_connection *conn = call->conn;
- NTSTATUS status;
-
- status = gensec_update_recv(subreq, call,
- &call->out_auth_info->credentials);
- TALLOC_FREE(subreq);
-
- status = dcesrv_auth_complete(call, status);
- if (!NT_STATUS_IS_OK(status)) {
- status = dcesrv_bind_nak(call, 0);
- dcesrv_conn_auth_wait_finished(conn, status);
- return;
- }
-
- status = dcesrv_auth_reply(call);
- dcesrv_conn_auth_wait_finished(conn, status);
- return;
-}
-
-static NTSTATUS dcesrv_auth_reply(struct dcesrv_call_state *call)
-{
- struct ncacn_packet *pkt = &call->ack_pkt;
- struct data_blob_list_item *rep = NULL;
- NTSTATUS status;
-
- rep = talloc_zero(call, struct data_blob_list_item);
- if (!rep) {
- return NT_STATUS_NO_MEMORY;
- }
-
- status = dcerpc_ncacn_push_auth(&rep->blob,
- call,
- pkt,
- call->out_auth_info);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- dcerpc_set_frag_length(&rep->blob, rep->blob.length);
-
- DLIST_ADD_END(call->replies, rep);
- dcesrv_call_set_list(call, DCESRV_LIST_CALL_LIST);
-
- if (call->conn->call_list && call->conn->call_list->replies) {
- if (call->conn->transport.report_output_data) {
- call->conn->transport.report_output_data(call->conn);
- }
- }
-
- return NT_STATUS_OK;
-}
-
-
-static void dcesrv_auth3_done(struct tevent_req *subreq);
-
-/*
- handle a auth3 request
-*/
-static NTSTATUS dcesrv_auth3(struct dcesrv_call_state *call)
-{
- struct dcesrv_connection *conn = call->conn;
- struct dcesrv_auth *auth = call->auth_state;
- struct tevent_req *subreq = NULL;
- NTSTATUS status;
-
- if (!auth->auth_started) {
- return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
- }
-
- if (auth->auth_finished) {
- return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
- }
-
- status = dcerpc_verify_ncacn_packet_header(&call->pkt,
- DCERPC_PKT_AUTH3,
- call->pkt.u.auth3.auth_info.length,
- 0, /* required flags */
- DCERPC_PFC_FLAG_FIRST |
- DCERPC_PFC_FLAG_LAST |
- DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN |
- 0x08 | /* this is not defined, but should be ignored */
- DCERPC_PFC_FLAG_CONC_MPX |
- DCERPC_PFC_FLAG_DID_NOT_EXECUTE |
- DCERPC_PFC_FLAG_MAYBE |
- DCERPC_PFC_FLAG_OBJECT_UUID);
- if (!NT_STATUS_IS_OK(status)) {
- return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
- }
-
- /* handle the auth3 in the auth code */
- if (!dcesrv_auth_prepare_auth3(call)) {
- /*
- * we don't send a reply to a auth3 request,
- * except by a fault.
- *
- * In anycase we mark the connection as
- * invalid.
- */
- auth->auth_invalid = true;
- if (call->fault_code != 0) {
- return dcesrv_fault_disconnect(call, call->fault_code);
- }
- TALLOC_FREE(call);
- return NT_STATUS_OK;
- }
-
- subreq = gensec_update_send(call, call->event_ctx,
- auth->gensec_security,
- call->in_auth_info.credentials);
- if (subreq == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
- tevent_req_set_callback(subreq, dcesrv_auth3_done, call);
-
- return dcesrv_conn_auth_wait_setup(conn);
-}
-
-static void dcesrv_auth3_done(struct tevent_req *subreq)
-{
- struct dcesrv_call_state *call =
- tevent_req_callback_data(subreq,
- struct dcesrv_call_state);
- struct dcesrv_connection *conn = call->conn;
- struct dcesrv_auth *auth = call->auth_state;
- NTSTATUS status;
-
- status = gensec_update_recv(subreq, call,
- &call->out_auth_info->credentials);
- TALLOC_FREE(subreq);
-
- status = dcesrv_auth_complete(call, status);
- if (!NT_STATUS_IS_OK(status)) {
- /*
- * we don't send a reply to a auth3 request,
- * except by a fault.
- *
- * In anycase we mark the connection as
- * invalid.
- */
- auth->auth_invalid = true;
- if (call->fault_code != 0) {
- status = dcesrv_fault_disconnect(call, call->fault_code);
- dcesrv_conn_auth_wait_finished(conn, status);
- return;
- }
- TALLOC_FREE(call);
- dcesrv_conn_auth_wait_finished(conn, NT_STATUS_OK);
- return;
- }
-
- /*
- * we don't send a reply to a auth3 request.
- */
- TALLOC_FREE(call);
- dcesrv_conn_auth_wait_finished(conn, NT_STATUS_OK);
- return;
-}
-
-
-static NTSTATUS dcesrv_check_or_create_context(struct dcesrv_call_state *call,
- const struct dcerpc_bind *b,
- const struct dcerpc_ctx_list *ctx,
- struct dcerpc_ack_ctx *ack,
- bool validate_only,
- const struct ndr_syntax_id *supported_transfer)
-{
- uint32_t if_version;
- struct dcesrv_connection_context *context;
- const struct dcesrv_interface *iface;
- struct GUID uuid;
- NTSTATUS status;
- const struct ndr_syntax_id *selected_transfer = NULL;
- size_t i;
- bool ok;
-
- if (b == NULL) {
- return NT_STATUS_INTERNAL_ERROR;
- }
- if (ctx == NULL) {
- return NT_STATUS_INTERNAL_ERROR;
- }
- if (ctx->num_transfer_syntaxes < 1) {
- return NT_STATUS_INTERNAL_ERROR;
- }
- if (ack == NULL) {
- return NT_STATUS_INTERNAL_ERROR;
- }
- if (supported_transfer == NULL) {
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- switch (ack->result) {
- case DCERPC_BIND_ACK_RESULT_ACCEPTANCE:
- case DCERPC_BIND_ACK_RESULT_NEGOTIATE_ACK:
- /*
- * We is already completed.
- */
- return NT_STATUS_OK;
- default:
- break;
- }
-
- ack->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION;
- ack->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED;
-
- if_version = ctx->abstract_syntax.if_version;
- uuid = ctx->abstract_syntax.uuid;
-
- iface = find_interface_by_uuid(call->conn->endpoint, &uuid, if_version);
- if (iface == NULL) {
- char *uuid_str = GUID_string(call, &uuid);
- DEBUG(2,("Request for unknown dcerpc interface %s/%d\n", uuid_str, if_version));
- talloc_free(uuid_str);
- /*
- * We report this only via ack->result
- */
- return NT_STATUS_OK;
- }
-
- ack->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION;
- ack->reason.value = DCERPC_BIND_ACK_REASON_TRANSFER_SYNTAXES_NOT_SUPPORTED;
-
- if (validate_only) {
- /*
- * We report this only via ack->result
- */
- return NT_STATUS_OK;
- }
-
- for (i = 0; i < ctx->num_transfer_syntaxes; i++) {
- /*
- * we only do NDR encoded dcerpc for now.
- */
- ok = ndr_syntax_id_equal(&ctx->transfer_syntaxes[i],
- supported_transfer);
- if (ok) {
- selected_transfer = supported_transfer;
- break;
- }
- }
-
- context = dcesrv_find_context(call->conn, ctx->context_id);
- if (context != NULL) {
- ok = ndr_syntax_id_equal(&context->iface->syntax_id,
- &ctx->abstract_syntax);
- if (!ok) {
- return NT_STATUS_RPC_PROTOCOL_ERROR;
- }
-
- if (selected_transfer != NULL) {
- ok = ndr_syntax_id_equal(&context->transfer_syntax,
- selected_transfer);
- if (!ok) {
- return NT_STATUS_RPC_PROTOCOL_ERROR;
- }
-
- ack->result = DCERPC_BIND_ACK_RESULT_ACCEPTANCE;
- ack->reason.value = DCERPC_BIND_ACK_REASON_NOT_SPECIFIED;
- ack->syntax = context->transfer_syntax;
- }
-
- /*
- * We report this only via ack->result
- */
- return NT_STATUS_OK;
- }
-
- if (selected_transfer == NULL) {
- /*
- * We report this only via ack->result
- */
- return NT_STATUS_OK;
- }
-
- ack->result = DCERPC_BIND_ACK_RESULT_USER_REJECTION;
- ack->reason.value = DCERPC_BIND_ACK_REASON_LOCAL_LIMIT_EXCEEDED;
-
- /* add this context to the list of available context_ids */
- context = talloc_zero(call->conn, struct dcesrv_connection_context);
- if (context == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
- context->conn = call->conn;
- context->context_id = ctx->context_id;
- context->iface = iface;
- context->transfer_syntax = *selected_transfer;
- DLIST_ADD(call->conn->contexts, context);
- call->context = context;
- talloc_set_destructor(context, dcesrv_connection_context_destructor);
-
- dcesrv_prepare_context_auth(call);
-
- /*
- * Multiplex is supported by default
- */
- call->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED;
-
- status = iface->bind(context, iface);
- call->context = NULL;
- if (!NT_STATUS_IS_OK(status)) {
- /* we don't want to trigger the iface->unbind() hook */
- context->iface = NULL;
- talloc_free(context);
- /*
- * We report this only via ack->result
- */
- return NT_STATUS_OK;
- }
-
- ack->result = DCERPC_BIND_ACK_RESULT_ACCEPTANCE;
- ack->reason.value = DCERPC_BIND_ACK_REASON_NOT_SPECIFIED;
- ack->syntax = context->transfer_syntax;
- return NT_STATUS_OK;
-}
-
-static NTSTATUS dcesrv_negotiate_contexts(struct dcesrv_call_state *call,
- const struct dcerpc_bind *b,
- struct dcerpc_ack_ctx *ack_ctx_list)
-{
- NTSTATUS status;
- size_t i;
- bool validate_only = false;
- bool preferred_ndr32;
-
- /*
- * Try to negotiate one new presentation context,
- * using our preferred transfer syntax.
- */
- for (i = 0; i < b->num_contexts; i++) {
- const struct dcerpc_ctx_list *c = &b->ctx_list[i];
- struct dcerpc_ack_ctx *a = &ack_ctx_list[i];
-
- status = dcesrv_check_or_create_context(call, b, c, a,
- validate_only,
- call->conn->preferred_transfer);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- if (a->result == DCERPC_BIND_ACK_RESULT_ACCEPTANCE) {
- /*
- * We managed to negotiate one context.
- *
- * => we're done.
- */
- validate_only = true;
- }
- }
-
- preferred_ndr32 = ndr_syntax_id_equal(&ndr_transfer_syntax_ndr,
- call->conn->preferred_transfer);
- if (preferred_ndr32) {
- /*
- * We're done.
- */
- return NT_STATUS_OK;
- }
-
- /*
- * Try to negotiate one new presentation context,
- * using NDR 32 as fallback.
- */
- for (i = 0; i < b->num_contexts; i++) {
- const struct dcerpc_ctx_list *c = &b->ctx_list[i];
- struct dcerpc_ack_ctx *a = &ack_ctx_list[i];
-
- status = dcesrv_check_or_create_context(call, b, c, a,
- validate_only,
- &ndr_transfer_syntax_ndr);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- if (a->result == DCERPC_BIND_ACK_RESULT_ACCEPTANCE) {
- /*
- * We managed to negotiate one context.
- *
- * => we're done.
- */
- validate_only = true;
- }
- }
-
- return NT_STATUS_OK;
-}
-
-static void dcesrv_alter_done(struct tevent_req *subreq);
-
-/*
- handle a alter context request
-*/
-static NTSTATUS dcesrv_alter(struct dcesrv_call_state *call)
-{
- struct dcesrv_connection *conn = call->conn;
- NTSTATUS status;
- bool auth_ok = false;
- struct ncacn_packet *pkt = &call->ack_pkt;
- uint32_t extra_flags = 0;
- struct dcesrv_auth *auth = call->auth_state;
- struct dcerpc_ack_ctx *ack_ctx_list = NULL;
- struct tevent_req *subreq = NULL;
- size_t i;
-
- if (!call->conn->allow_alter) {
- return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
- }
-
- status = dcerpc_verify_ncacn_packet_header(&call->pkt,
- DCERPC_PKT_ALTER,
- call->pkt.u.alter.auth_info.length,
- 0, /* required flags */
- DCERPC_PFC_FLAG_FIRST |
- DCERPC_PFC_FLAG_LAST |
- DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN |
- 0x08 | /* this is not defined, but should be ignored */
- DCERPC_PFC_FLAG_CONC_MPX |
- DCERPC_PFC_FLAG_DID_NOT_EXECUTE |
- DCERPC_PFC_FLAG_MAYBE |
- DCERPC_PFC_FLAG_OBJECT_UUID);
- if (!NT_STATUS_IS_OK(status)) {
- return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
- }
-
- auth_ok = dcesrv_auth_alter(call);
- if (!auth_ok) {
- if (call->fault_code != 0) {
- return dcesrv_fault_disconnect(call, call->fault_code);
- }
- }
-
- if (call->pkt.u.alter.num_contexts < 1) {
- return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
- }
-
- ack_ctx_list = talloc_zero_array(call, struct dcerpc_ack_ctx,
- call->pkt.u.alter.num_contexts);
- if (ack_ctx_list == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
-
- /*
- * Set some sane defaults (required by dcesrv_negotiate_contexts()/
- * dcesrv_check_or_create_context()) and do some protocol validation
- * and set sane defaults.
- */
- for (i = 0; i < call->pkt.u.alter.num_contexts; i++) {
- const struct dcerpc_ctx_list *c = &call->pkt.u.alter.ctx_list[i];
- struct dcerpc_ack_ctx *a = &ack_ctx_list[i];
-
- if (c->num_transfer_syntaxes == 0) {
- return dcesrv_fault_disconnect(call,
- DCERPC_NCA_S_PROTO_ERROR);
- }
-
- a->result = DCERPC_BIND_ACK_RESULT_PROVIDER_REJECTION;
- a->reason.value = DCERPC_BIND_ACK_REASON_ABSTRACT_SYNTAX_NOT_SUPPORTED;
- }
-
- /*
- * Try to negotiate one new presentation context.
- */
- status = dcesrv_negotiate_contexts(call, &call->pkt.u.alter, ack_ctx_list);
- if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) {
- return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
- }
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- if ((call->pkt.pfc_flags & DCERPC_PFC_FLAG_CONC_MPX) &&
- (call->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) {
- call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED;
- extra_flags |= DCERPC_PFC_FLAG_CONC_MPX;
- }
-
- if (call->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) {
- call->conn->state_flags |= DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL;
- }
-
- /* handle any authentication that is being requested */
- if (!auth_ok) {
- if (call->in_auth_info.auth_type != auth->auth_type) {
- return dcesrv_fault_disconnect(call,
- DCERPC_FAULT_SEC_PKG_ERROR);
- }
- return dcesrv_fault_disconnect(call, DCERPC_FAULT_ACCESS_DENIED);
- }
-
- dcesrv_init_hdr(pkt, lpcfg_rpc_big_endian(call->conn->dce_ctx->lp_ctx));
- pkt->auth_length = 0;
- pkt->call_id = call->pkt.call_id;
- pkt->ptype = DCERPC_PKT_ALTER_RESP;
- pkt->pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | extra_flags;
- pkt->u.alter_resp.max_xmit_frag = call->conn->max_xmit_frag;
- pkt->u.alter_resp.max_recv_frag = call->conn->max_recv_frag;
- pkt->u.alter_resp.assoc_group_id = call->conn->assoc_group->id;
- pkt->u.alter_resp.secondary_address = "";
- pkt->u.alter_resp.num_results = call->pkt.u.alter.num_contexts;
- pkt->u.alter_resp.ctx_list = ack_ctx_list;
- pkt->u.alter_resp.auth_info = data_blob_null;
-
- status = dcesrv_auth_prepare_alter_ack(call, pkt);
- if (!NT_STATUS_IS_OK(status)) {
- return dcesrv_fault_disconnect(call, DCERPC_FAULT_SEC_PKG_ERROR);
- }
-
- if (auth->auth_finished) {
- return dcesrv_auth_reply(call);
- }
-
- subreq = gensec_update_send(call, call->event_ctx,
- auth->gensec_security,
- call->in_auth_info.credentials);
- if (subreq == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
- tevent_req_set_callback(subreq, dcesrv_alter_done, call);
-
- return dcesrv_conn_auth_wait_setup(conn);
-}
-
-static void dcesrv_alter_done(struct tevent_req *subreq)
-{
- struct dcesrv_call_state *call =
- tevent_req_callback_data(subreq,
- struct dcesrv_call_state);
- struct dcesrv_connection *conn = call->conn;
- NTSTATUS status;
-
- status = gensec_update_recv(subreq, call,
- &call->out_auth_info->credentials);
- TALLOC_FREE(subreq);
-
- status = dcesrv_auth_complete(call, status);
- if (!NT_STATUS_IS_OK(status)) {
- status = dcesrv_fault_disconnect(call, DCERPC_FAULT_SEC_PKG_ERROR);
- dcesrv_conn_auth_wait_finished(conn, status);
- return;
- }
-
- status = dcesrv_auth_reply(call);
- dcesrv_conn_auth_wait_finished(conn, status);
- return;
-}
-
-/*
- possibly save the call for inspection with ndrdump
- */
-static void dcesrv_save_call(struct dcesrv_call_state *call, const char *why)
-{
-#ifdef DEVELOPER
- char *fname;
- const char *dump_dir;
- dump_dir = lpcfg_parm_string(call->conn->dce_ctx->lp_ctx, NULL, "dcesrv", "stubs directory");
- if (!dump_dir) {
- return;
- }
- fname = talloc_asprintf(call, "%s/RPC-%s-%u-%s.dat",
- dump_dir,
- call->context->iface->name,
- call->pkt.u.request.opnum,
- why);
- if (file_save(fname, call->pkt.u.request.stub_and_verifier.data, call->pkt.u.request.stub_and_verifier.length)) {
- DEBUG(0,("RPC SAVED %s\n", fname));
- }
- talloc_free(fname);
-#endif
-}
-
-static NTSTATUS dcesrv_check_verification_trailer(struct dcesrv_call_state *call)
-{
- TALLOC_CTX *frame = talloc_stackframe();
- const uint32_t bitmask1 = call->conn->client_hdr_signing ?
- DCERPC_SEC_VT_CLIENT_SUPPORTS_HEADER_SIGNING : 0;
- const struct dcerpc_sec_vt_pcontext pcontext = {
- .abstract_syntax = call->context->iface->syntax_id,
- .transfer_syntax = call->context->transfer_syntax,
- };
- const struct dcerpc_sec_vt_header2 header2 =
- dcerpc_sec_vt_header2_from_ncacn_packet(&call->pkt);
- enum ndr_err_code ndr_err;
- struct dcerpc_sec_verification_trailer *vt = NULL;
- NTSTATUS status = NT_STATUS_OK;
- bool ok;
-
- SMB_ASSERT(call->pkt.ptype == DCERPC_PKT_REQUEST);
-
- ndr_err = ndr_pop_dcerpc_sec_verification_trailer(call->ndr_pull,
- frame, &vt);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- status = ndr_map_error2ntstatus(ndr_err);
- goto done;
- }
-
- ok = dcerpc_sec_verification_trailer_check(vt, &bitmask1,
- &pcontext, &header2);
- if (!ok) {
- status = NT_STATUS_ACCESS_DENIED;
- goto done;
- }
-done:
- TALLOC_FREE(frame);
- return status;
-}
-
-/*
- handle a dcerpc request packet
-*/
-static NTSTATUS dcesrv_request(struct dcesrv_call_state *call)
-{
- const struct dcesrv_endpoint *endpoint = call->conn->endpoint;
- struct dcesrv_auth *auth = call->auth_state;
- enum dcerpc_transport_t transport =
- dcerpc_binding_get_transport(endpoint->ep_description);
- struct ndr_pull *pull;
- NTSTATUS status;
-
- if (!auth->auth_finished) {
- return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
- }
-
- /* if authenticated, and the mech we use can't do async replies, don't use them... */
- if (auth->gensec_security != NULL &&
- !gensec_have_feature(auth->gensec_security, GENSEC_FEATURE_ASYNC_REPLIES)) {
- call->state_flags &= ~DCESRV_CALL_STATE_FLAG_MAY_ASYNC;
- }
-
- if (call->context == NULL) {
- return dcesrv_fault_with_flags(call, DCERPC_NCA_S_UNKNOWN_IF,
- DCERPC_PFC_FLAG_DID_NOT_EXECUTE);
- }
-
- switch (auth->auth_level) {
- case DCERPC_AUTH_LEVEL_NONE:
- case DCERPC_AUTH_LEVEL_PACKET:
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- case DCERPC_AUTH_LEVEL_PRIVACY:
- break;
- default:
- if (!call->context->allow_connect) {
- char *addr;
-
- addr = tsocket_address_string(call->conn->remote_address,
- call);
-
- DEBUG(2, ("%s: restrict auth_level_connect access "
- "to [%s] with auth[type=0x%x,level=0x%x] "
- "on [%s] from [%s]\n",
- __func__, call->context->iface->name,
- auth->auth_type,
- auth->auth_level,
- derpc_transport_string_by_transport(transport),
- addr));
- return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
- }
- break;
- }
-
- if (auth->auth_level < call->context->min_auth_level) {
- char *addr;
-
- addr = tsocket_address_string(call->conn->remote_address, call);
-
- DEBUG(2, ("%s: restrict access by min_auth_level[0x%x] "
- "to [%s] with auth[type=0x%x,level=0x%x] "
- "on [%s] from [%s]\n",
- __func__,
- call->context->min_auth_level,
- call->context->iface->name,
- auth->auth_type,
- auth->auth_level,
- derpc_transport_string_by_transport(transport),
- addr));
- return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
- }
-
- pull = ndr_pull_init_blob(&call->pkt.u.request.stub_and_verifier, call);
- NT_STATUS_HAVE_NO_MEMORY(pull);
-
- pull->flags |= LIBNDR_FLAG_REF_ALLOC;
-
- call->ndr_pull = pull;
-
- if (!(call->pkt.drep[0] & DCERPC_DREP_LE)) {
- pull->flags |= LIBNDR_FLAG_BIGENDIAN;
- }
-
- status = dcesrv_check_verification_trailer(call);
- if (!NT_STATUS_IS_OK(status)) {
- uint32_t faultcode = DCERPC_FAULT_OTHER;
- if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
- faultcode = DCERPC_FAULT_ACCESS_DENIED;
- }
- DEBUG(10, ("dcesrv_check_verification_trailer failed: %s\n",
- nt_errstr(status)));
- return dcesrv_fault(call, faultcode);
- }
-
- /* unravel the NDR for the packet */
- status = call->context->iface->ndr_pull(call, call, pull, &call->r);
- if (!NT_STATUS_IS_OK(status)) {
- uint8_t extra_flags = 0;
- if (call->fault_code == DCERPC_FAULT_OP_RNG_ERROR) {
- /* we got an unknown call */
- DEBUG(3,(__location__ ": Unknown RPC call %u on %s\n",
- call->pkt.u.request.opnum,
- call->context->iface->name));
- dcesrv_save_call(call, "unknown");
- extra_flags |= DCERPC_PFC_FLAG_DID_NOT_EXECUTE;
- } else {
- dcesrv_save_call(call, "pullfail");
- }
- return dcesrv_fault_with_flags(call, call->fault_code, extra_flags);
- }
-
- if (pull->offset != pull->data_size) {
- dcesrv_save_call(call, "extrabytes");
- DEBUG(3,("Warning: %d extra bytes in incoming RPC request\n",
- pull->data_size - pull->offset));
- }
-
- /* call the dispatch function */
- status = call->context->iface->dispatch(call, call, call->r);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(5,("dcerpc fault in call %s:%02x - %s\n",
- call->context->iface->name,
- call->pkt.u.request.opnum,
- dcerpc_errstr(pull, call->fault_code)));
- return dcesrv_fault(call, call->fault_code);
- }
-
- /* add the call to the pending list */
- dcesrv_call_set_list(call, DCESRV_LIST_PENDING_CALL_LIST);
-
- if (call->state_flags & DCESRV_CALL_STATE_FLAG_ASYNC) {
- return NT_STATUS_OK;
- }
-
- return dcesrv_reply(call);
-}
-
-
-/*
- remove the call from the right list when freed
- */
-static int dcesrv_call_dequeue(struct dcesrv_call_state *call)
-{
- dcesrv_call_set_list(call, DCESRV_LIST_NONE);
- return 0;
-}
-
-_PUBLIC_ const struct tsocket_address *dcesrv_connection_get_local_address(struct dcesrv_connection *conn)
-{
- return conn->local_address;
-}
-
-_PUBLIC_ const struct tsocket_address *dcesrv_connection_get_remote_address(struct dcesrv_connection *conn)
-{
- return conn->remote_address;
-}
-
-/*
- process some input to a dcerpc endpoint server.
-*/
-static NTSTATUS dcesrv_process_ncacn_packet(struct dcesrv_connection *dce_conn,
- struct ncacn_packet *pkt,
- DATA_BLOB blob)
-{
- NTSTATUS status;
- struct dcesrv_call_state *call;
- struct dcesrv_call_state *existing = NULL;
- size_t num_auth_ctx = 0;
- enum dcerpc_AuthType auth_type = 0;
- enum dcerpc_AuthLevel auth_level = 0;
- uint32_t auth_context_id = 0;
-
- call = talloc_zero(dce_conn, struct dcesrv_call_state);
- if (!call) {
- data_blob_free(&blob);
- talloc_free(pkt);
- return NT_STATUS_NO_MEMORY;
- }
- call->conn = dce_conn;
- call->event_ctx = dce_conn->event_ctx;
- call->state_flags = call->conn->state_flags;
- call->time = timeval_current();
- call->list = DCESRV_LIST_NONE;
-
- talloc_steal(call, pkt);
- talloc_steal(call, blob.data);
- call->pkt = *pkt;
-
- if (dce_conn->max_auth_states == 0) {
- call->auth_state = dce_conn->default_auth_state;
- } else if (call->pkt.auth_length == 0) {
- if (call->pkt.ptype == DCERPC_PKT_REQUEST &&
- dce_conn->default_auth_level_connect != NULL)
- {
- call->auth_state = dce_conn->default_auth_level_connect;
- } else {
- call->auth_state = dce_conn->default_auth_state;
- }
- }
-
- if (call->auth_state == NULL) {
- struct dcesrv_auth *a = NULL;
-
- auth_type = dcerpc_get_auth_type(&blob);
- auth_level = dcerpc_get_auth_level(&blob);
- auth_context_id = dcerpc_get_auth_context_id(&blob);
-
- if (call->pkt.ptype == DCERPC_PKT_REQUEST) {
- dce_conn->default_auth_level_connect = NULL;
- if (auth_level == DCERPC_AUTH_LEVEL_CONNECT) {
- dce_conn->got_explicit_auth_level_connect = true;
- }
- }
-
- for (a = dce_conn->auth_states; a != NULL; a = a->next) {
- num_auth_ctx++;
-
- if (a->auth_type != auth_type) {
- continue;
- }
- if (a->auth_finished && a->auth_level != auth_level) {
- continue;
- }
- if (a->auth_context_id != auth_context_id) {
- continue;
- }
-
- DLIST_PROMOTE(dce_conn->auth_states, a);
- call->auth_state = a;
- break;
- }
- }
-
- if (call->auth_state == NULL) {
- struct dcesrv_auth *a = NULL;
-
- if (num_auth_ctx >= dce_conn->max_auth_states) {
- return dcesrv_fault_disconnect(call,
- DCERPC_NCA_S_PROTO_ERROR);
- }
-
- a = dcesrv_auth_create(dce_conn);
- if (a == NULL) {
- talloc_free(call);
- return NT_STATUS_NO_MEMORY;
- }
- DLIST_ADD(dce_conn->auth_states, a);
- if (call->pkt.ptype == DCERPC_PKT_REQUEST) {
- /*
- * This can never be valid.
- */
- a->auth_invalid = true;
- }
- call->auth_state = a;
- }
-
- talloc_set_destructor(call, dcesrv_call_dequeue);
-
- if (call->conn->allow_bind) {
- /*
- * Only one bind is possible per connection
- */
- call->conn->allow_bind = false;
- return dcesrv_bind(call);
- }
-
- /* we have to check the signing here, before combining the
- pdus */
- if (call->pkt.ptype == DCERPC_PKT_REQUEST) {
- dcesrv_default_auth_state_prepare_request(call);
-
- if (call->auth_state->auth_started &&
- !call->auth_state->auth_finished) {
- return dcesrv_fault_disconnect(call,
- DCERPC_NCA_S_PROTO_ERROR);
- }
-
- status = dcerpc_verify_ncacn_packet_header(&call->pkt,
- DCERPC_PKT_REQUEST,
- call->pkt.u.request.stub_and_verifier.length,
- 0, /* required_flags */
- DCERPC_PFC_FLAG_FIRST |
- DCERPC_PFC_FLAG_LAST |
- DCERPC_PFC_FLAG_PENDING_CANCEL |
- 0x08 | /* this is not defined, but should be ignored */
- DCERPC_PFC_FLAG_CONC_MPX |
- DCERPC_PFC_FLAG_DID_NOT_EXECUTE |
- DCERPC_PFC_FLAG_MAYBE |
- DCERPC_PFC_FLAG_OBJECT_UUID);
- if (!NT_STATUS_IS_OK(status)) {
- return dcesrv_fault_disconnect(call,
- DCERPC_NCA_S_PROTO_ERROR);
- }
-
- if (call->pkt.frag_length > DCERPC_FRAG_MAX_SIZE) {
- /*
- * We don't use dcesrv_fault_disconnect()
- * here, because we don't want to set
- * DCERPC_PFC_FLAG_DID_NOT_EXECUTE
- *
- * Note that we don't check against the negotiated
- * max_recv_frag, but a hard coded value.
- */
- dcesrv_call_disconnect_after(call,
- "dcesrv_auth_request - frag_length too large");
- return dcesrv_fault(call,
- DCERPC_NCA_S_PROTO_ERROR);
- }
-
- if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_FIRST) {
- if (dce_conn->pending_call_list != NULL) {
- /*
- * concurrent requests are only allowed
- * if DCERPC_PFC_FLAG_CONC_MPX was negotiated.
- */
- if (!(dce_conn->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) {
- dcesrv_call_disconnect_after(call,
- "dcesrv_auth_request - "
- "existing pending call without CONN_MPX");
- return dcesrv_fault(call,
- DCERPC_NCA_S_PROTO_ERROR);
- }
- }
- /* only one request is possible in the fragmented list */
- if (dce_conn->incoming_fragmented_call_list != NULL) {
- if (!(dce_conn->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) {
- /*
- * Without DCERPC_PFC_FLAG_CONC_MPX
- * we need to return the FAULT on the
- * already existing call.
- *
- * This is important to get the
- * call_id and context_id right.
- */
- TALLOC_FREE(call);
- call = dce_conn->incoming_fragmented_call_list;
- }
- dcesrv_call_disconnect_after(call,
- "dcesrv_auth_request - "
- "existing fragmented call");
- return dcesrv_fault(call,
- DCERPC_NCA_S_PROTO_ERROR);
- }
- if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_PENDING_CANCEL) {
- return dcesrv_fault_disconnect(call,
- DCERPC_FAULT_NO_CALL_ACTIVE);
- }
- call->context = dcesrv_find_context(call->conn,
- call->pkt.u.request.context_id);
- if (call->context == NULL) {
- return dcesrv_fault_with_flags(call, DCERPC_NCA_S_UNKNOWN_IF,
- DCERPC_PFC_FLAG_DID_NOT_EXECUTE);
- }
- } else {
- const struct dcerpc_request *nr = &call->pkt.u.request;
- const struct dcerpc_request *er = NULL;
- int cmp;
-
- existing = dcesrv_find_fragmented_call(dce_conn,
- call->pkt.call_id);
- if (existing == NULL) {
- dcesrv_call_disconnect_after(call,
- "dcesrv_auth_request - "
- "no existing fragmented call");
- return dcesrv_fault(call,
- DCERPC_NCA_S_PROTO_ERROR);
- }
- er = &existing->pkt.u.request;
-
- if (call->pkt.ptype != existing->pkt.ptype) {
- /* trying to play silly buggers are we? */
- return dcesrv_fault_disconnect(existing,
- DCERPC_NCA_S_PROTO_ERROR);
- }
- cmp = memcmp(call->pkt.drep, existing->pkt.drep,
- sizeof(pkt->drep));
- if (cmp != 0) {
- return dcesrv_fault_disconnect(existing,
- DCERPC_NCA_S_PROTO_ERROR);
- }
- if (nr->context_id != er->context_id) {
- return dcesrv_fault_disconnect(existing,
- DCERPC_NCA_S_PROTO_ERROR);
- }
- if (nr->opnum != er->opnum) {
- return dcesrv_fault_disconnect(existing,
- DCERPC_NCA_S_PROTO_ERROR);
- }
- }
- }
-
- if (call->pkt.ptype == DCERPC_PKT_REQUEST) {
- bool ok;
- uint8_t payload_offset = DCERPC_REQUEST_LENGTH;
-
- if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) {
- payload_offset += 16;
- }
-
- ok = dcesrv_auth_pkt_pull(call, &blob,
- 0, /* required_flags */
- DCERPC_PFC_FLAG_FIRST |
- DCERPC_PFC_FLAG_LAST |
- DCERPC_PFC_FLAG_PENDING_CANCEL |
- 0x08 | /* this is not defined, but should be ignored */
- DCERPC_PFC_FLAG_CONC_MPX |
- DCERPC_PFC_FLAG_DID_NOT_EXECUTE |
- DCERPC_PFC_FLAG_MAYBE |
- DCERPC_PFC_FLAG_OBJECT_UUID,
- payload_offset,
- &call->pkt.u.request.stub_and_verifier);
- if (!ok) {
- /*
- * We don't use dcesrv_fault_disconnect()
- * here, because we don't want to set
- * DCERPC_PFC_FLAG_DID_NOT_EXECUTE
- */
- dcesrv_call_disconnect_after(call,
- "dcesrv_auth_request - failed");
- if (call->fault_code == 0) {
- call->fault_code = DCERPC_FAULT_ACCESS_DENIED;
- }
- return dcesrv_fault(call, call->fault_code);
- }
- }
-
- /* see if this is a continued packet */
- if (existing != NULL) {
- struct dcerpc_request *er = &existing->pkt.u.request;
- const struct dcerpc_request *nr = &call->pkt.u.request;
- size_t available;
- size_t alloc_size;
- size_t alloc_hint;
-
- /*
- * Up to 4 MByte are allowed by all fragments
- */
- available = dce_conn->max_total_request_size;
- if (er->stub_and_verifier.length > available) {
- dcesrv_call_disconnect_after(existing,
- "dcesrv_auth_request - existing payload too large");
- return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED);
- }
- available -= er->stub_and_verifier.length;
- if (nr->alloc_hint > available) {
- dcesrv_call_disconnect_after(existing,
- "dcesrv_auth_request - alloc hint too large");
- return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED);
- }
- if (nr->stub_and_verifier.length > available) {
- dcesrv_call_disconnect_after(existing,
- "dcesrv_auth_request - new payload too large");
- return dcesrv_fault(existing, DCERPC_FAULT_ACCESS_DENIED);
- }
- alloc_hint = er->stub_and_verifier.length + nr->alloc_hint;
- /* allocate at least 1 byte */
- alloc_hint = MAX(alloc_hint, 1);
- alloc_size = er->stub_and_verifier.length +
- nr->stub_and_verifier.length;
- alloc_size = MAX(alloc_size, alloc_hint);
-
- er->stub_and_verifier.data =
- talloc_realloc(existing,
- er->stub_and_verifier.data,
- uint8_t, alloc_size);
- if (er->stub_and_verifier.data == NULL) {
- TALLOC_FREE(call);
- return dcesrv_fault_with_flags(existing,
- DCERPC_FAULT_OUT_OF_RESOURCES,
- DCERPC_PFC_FLAG_DID_NOT_EXECUTE);
- }
- memcpy(er->stub_and_verifier.data +
- er->stub_and_verifier.length,
- nr->stub_and_verifier.data,
- nr->stub_and_verifier.length);
- er->stub_and_verifier.length += nr->stub_and_verifier.length;
-
- existing->pkt.pfc_flags |= (call->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST);
-
- TALLOC_FREE(call);
- call = existing;
- }
-
- /* this may not be the last pdu in the chain - if its isn't then
- just put it on the incoming_fragmented_call_list and wait for the rest */
- if (call->pkt.ptype == DCERPC_PKT_REQUEST &&
- !(call->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST)) {
- /*
- * Up to 4 MByte are allowed by all fragments
- */
- if (call->pkt.u.request.alloc_hint > dce_conn->max_total_request_size) {
- dcesrv_call_disconnect_after(call,
- "dcesrv_auth_request - initial alloc hint too large");
- return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
- }
- dcesrv_call_set_list(call, DCESRV_LIST_FRAGMENTED_CALL_LIST);
- return NT_STATUS_OK;
- }
-
- /* This removes any fragments we may have had stashed away */
- dcesrv_call_set_list(call, DCESRV_LIST_NONE);
-
- switch (call->pkt.ptype) {
- case DCERPC_PKT_BIND:
- status = dcesrv_bind_nak(call,
- DCERPC_BIND_NAK_REASON_NOT_SPECIFIED);
- break;
- case DCERPC_PKT_AUTH3:
- status = dcesrv_auth3(call);
- break;
- case DCERPC_PKT_ALTER:
- status = dcesrv_alter(call);
- break;
- case DCERPC_PKT_REQUEST:
- status = dcesrv_request(call);
- break;
- case DCERPC_PKT_CO_CANCEL:
- case DCERPC_PKT_ORPHANED:
- /*
- * Window just ignores CO_CANCEL and ORPHANED,
- * so we do...
- */
- status = NT_STATUS_OK;
- TALLOC_FREE(call);
- break;
- case DCERPC_PKT_BIND_ACK:
- case DCERPC_PKT_BIND_NAK:
- case DCERPC_PKT_ALTER_RESP:
- case DCERPC_PKT_RESPONSE:
- case DCERPC_PKT_FAULT:
- case DCERPC_PKT_SHUTDOWN:
- default:
- status = dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
- break;
- }
-
- /* if we are going to be sending a reply then add
- it to the list of pending calls. We add it to the end to keep the call
- list in the order we will answer */
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(call);
- }
-
- return status;
-}
-
-_PUBLIC_ NTSTATUS dcesrv_init_context(TALLOC_CTX *mem_ctx,
- struct loadparm_context *lp_ctx,
- const char **endpoint_servers,
- struct dcesrv_context_callbacks *cb,
- struct dcesrv_context **_dce_ctx)
-{
- NTSTATUS status;
- struct dcesrv_context *dce_ctx;
- int i;
-
- if (!endpoint_servers) {
- DEBUG(0,("dcesrv_init_context: no endpoint servers configured\n"));
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- dce_ctx = talloc_zero(mem_ctx, struct dcesrv_context);
- NT_STATUS_HAVE_NO_MEMORY(dce_ctx);
-
- if (uid_wrapper_enabled()) {
- setenv("UID_WRAPPER_MYUID", "1", 1);
- }
- dce_ctx->initial_euid = geteuid();
- if (uid_wrapper_enabled()) {
- unsetenv("UID_WRAPPER_MYUID");
- }
-
- dce_ctx->endpoint_list = NULL;
- dce_ctx->lp_ctx = lp_ctx;
- dce_ctx->assoc_groups_idr = idr_init(dce_ctx);
- NT_STATUS_HAVE_NO_MEMORY(dce_ctx->assoc_groups_idr);
- dce_ctx->broken_connections = NULL;
- if (cb != NULL) {
- dce_ctx->callbacks = *cb;
- }
-
- for (i=0;endpoint_servers[i];i++) {
- const struct dcesrv_endpoint_server *ep_server;
-
- ep_server = dcesrv_ep_server_byname(endpoint_servers[i]);
- if (!ep_server) {
- DEBUG(0,("dcesrv_init_context: failed to find endpoint server = '%s'\n", endpoint_servers[i]));
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- status = ep_server->init_server(dce_ctx, ep_server);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("dcesrv_init_context: failed to init endpoint server = '%s': %s\n", endpoint_servers[i],
- nt_errstr(status)));
- return status;
- }
- }
-
- *_dce_ctx = dce_ctx;
- return NT_STATUS_OK;
+ return talloc_reference(conn, assoc_group);
}
-/* the list of currently registered DCERPC endpoint servers.
- */
-static struct ep_server {
- struct dcesrv_endpoint_server *ep_server;
-} *ep_servers = NULL;
-static int num_ep_servers;
+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) {
+ DEBUG(0,(__location__ ": Failed to remove assoc_group 0x%08x\n",
+ assoc_group->id));
+ }
+ return 0;
+}
/*
- register a DCERPC endpoint server.
-
- The 'name' can be later used by other backends to find the operations
- structure for this backend.
-
-*/
-_PUBLIC_ NTSTATUS dcerpc_register_ep_server(const struct dcesrv_endpoint_server *ep_server)
+ allocate a new association group
+ */
+static struct dcesrv_assoc_group *dcesrv_assoc_group_new(struct dcesrv_connection *conn)
{
-
- if (dcesrv_ep_server_byname(ep_server->name) != NULL) {
- /* its already registered! */
- DEBUG(0,("DCERPC endpoint server '%s' already registered\n",
- ep_server->name));
- return NT_STATUS_OBJECT_NAME_COLLISION;
- }
+ 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;
+ int id;
- ep_servers = realloc_p(ep_servers, struct ep_server, num_ep_servers+1);
- if (!ep_servers) {
- smb_panic("out of memory in dcerpc_register");
+ assoc_group = talloc_zero(conn, struct dcesrv_assoc_group);
+ if (assoc_group == NULL) {
+ return NULL;
}
- ep_servers[num_ep_servers].ep_server = smb_xmemdup(ep_server, sizeof(*ep_server));
- ep_servers[num_ep_servers].ep_server->name = smb_xstrdup(ep_server->name);
+ id = idr_get_new_random(dce_ctx->assoc_groups_idr, assoc_group, UINT16_MAX);
+ if (id == -1) {
+ talloc_free(assoc_group);
+ DEBUG(0,(__location__ ": Out of association groups!\n"));
+ return NULL;
+ }
- num_ep_servers++;
+ assoc_group->transport = transport;
+ assoc_group->id = id;
+ assoc_group->dce_ctx = dce_ctx;
- DEBUG(3,("DCERPC endpoint server '%s' registered\n",
- ep_server->name));
+ talloc_set_destructor(assoc_group, dcesrv_assoc_group_destructor);
- return NT_STATUS_OK;
+ return assoc_group;
}
-/*
- return the operations structure for a named backend of the specified type
-*/
-_PUBLIC_ const struct dcesrv_endpoint_server *dcesrv_ep_server_byname(const char *name)
+NTSTATUS dcesrv_assoc_group_find(struct dcesrv_call_state *call)
{
- int i;
+ /*
+ if provided, check the assoc_group is valid
+ */
+ if (call->pkt.u.bind.assoc_group_id != 0) {
+ call->conn->assoc_group =
+ dcesrv_assoc_group_reference(call->conn,
+ call->pkt.u.bind.assoc_group_id);
+ } else {
+ call->conn->assoc_group = dcesrv_assoc_group_new(call->conn);
+ }
- for (i=0;i<num_ep_servers;i++) {
- if (strcmp(ep_servers[i].ep_server->name, name) == 0) {
- return ep_servers[i].ep_server;
- }
+ /*
+ * The NETLOGON server does not use handles and so
+ * there is no need to support association groups, but
+ * we need to give back a number regardless.
+ *
+ * We have to do this when it is not run as a single process,
+ * because then it can't see the other valid association
+ * groups. We handle this genericly for all endpoints not
+ * running in single process mode.
+ *
+ * We know which endpoint we are on even before checking the
+ * iface UUID, so for simplicity we enforce the same policy
+ * for all interfaces on the endpoint.
+ *
+ * This means that where NETLOGON
+ * shares an endpoint (such as ncalrpc or of 'lsa over
+ * netlogon' is set) we will still check association groups.
+ *
+ */
+
+ if (call->conn->assoc_group == NULL &&
+ !call->conn->endpoint->use_single_process) {
+ call->conn->assoc_group
+ = dcesrv_assoc_group_new(call->conn);
+ }
+
+ if (call->conn->assoc_group == NULL) {
+ /* TODO Return correct status */
+ return NT_STATUS_UNSUCCESSFUL;
}
- return NULL;
+ return NT_STATUS_OK;
}
void dcerpc_server_init(struct loadparm_context *lp_ctx)
talloc_free(shared_init);
}
-/*
- return the DCERPC module version, and the size of some critical types
- This can be used by endpoint server modules to either detect compilation errors, or provide
- multiple implementations for different smbd compilation options in one module
-*/
-const struct dcesrv_critical_sizes *dcerpc_module_version(void)
-{
- static const struct dcesrv_critical_sizes critical_sizes = {
- DCERPC_MODULE_VERSION,
- sizeof(struct dcesrv_context),
- sizeof(struct dcesrv_endpoint),
- sizeof(struct dcesrv_endpoint_server),
- sizeof(struct dcesrv_interface),
- sizeof(struct dcesrv_if_list),
- sizeof(struct dcesrv_connection),
- sizeof(struct dcesrv_call_state),
- sizeof(struct dcesrv_auth),
- sizeof(struct dcesrv_handle)
- };
-
- return &critical_sizes;
-}
-
-_PUBLIC_ void dcesrv_terminate_connection(struct dcesrv_connection *dce_conn, const char *reason)
-{
- struct dcesrv_context *dce_ctx = dce_conn->dce_ctx;
- struct dcesrv_auth *a = NULL;
-
- dce_conn->wait_send = NULL;
- dce_conn->wait_recv = NULL;
- dce_conn->wait_private = NULL;
-
- dce_conn->allow_bind = false;
- dce_conn->allow_alter = false;
-
- dce_conn->default_auth_state->auth_invalid = true;
-
- for (a = dce_conn->auth_states; a != NULL; a = a->next) {
- a->auth_invalid = true;
- }
-
- if (dce_conn->pending_call_list == NULL) {
- char *full_reason = talloc_asprintf(dce_conn, "dcesrv: %s", reason);
-
- DLIST_REMOVE(dce_ctx->broken_connections, dce_conn);
- dce_conn->transport.terminate_connection(dce_conn,
- full_reason ? full_reason : reason);
- return;
- }
-
- if (dce_conn->terminate != NULL) {
- return;
- }
-
- DEBUG(3,("dcesrv: terminating connection due to '%s' deferred due to pending calls\n",
- reason));
- dce_conn->terminate = talloc_strdup(dce_conn, reason);
- if (dce_conn->terminate == NULL) {
- dce_conn->terminate = "dcesrv: deferred terminating connection - no memory";
- }
- DLIST_ADD_END(dce_ctx->broken_connections, dce_conn);
-}
-
-_PUBLIC_ void dcesrv_cleanup_broken_connections(struct dcesrv_context *dce_ctx)
-{
- struct dcesrv_connection *cur, *next;
-
- next = dce_ctx->broken_connections;
- while (next != NULL) {
- cur = next;
- next = cur->next;
-
- if (cur->state_flags & DCESRV_CALL_STATE_FLAG_PROCESS_PENDING_CALL) {
- struct dcesrv_connection_context *context_cur, *context_next;
-
- context_next = cur->contexts;
- while (context_next != NULL) {
- context_cur = context_next;
- context_next = context_cur->next;
-
- dcesrv_connection_context_destructor(context_cur);
- }
- }
-
- dcesrv_terminate_connection(cur, cur->terminate);
- }
-}
-
-/* We need this include to be able to compile on some plateforms
- * (ie. freebsd 7.2) as it seems that <sys/uio.h> is not included
- * correctly.
- * It has to be that deep because otherwise we have a conflict on
- * const struct dcesrv_interface declaration.
- * This is mostly due to socket_wrapper defining #define bind swrap_bind
- * which conflict with the bind used before.
- */
-#include "system/network.h"
-
-struct dcesrv_sock_reply_state {
- struct dcesrv_connection *dce_conn;
- struct dcesrv_call_state *call;
- struct iovec iov;
-};
-
-static void dcesrv_sock_reply_done(struct tevent_req *subreq);
-static void dcesrv_call_terminate_step1(struct tevent_req *subreq);
-
-_PUBLIC_ void dcesrv_sock_report_output_data(struct dcesrv_connection *dce_conn)
-{
- struct dcesrv_call_state *call;
-
- call = dce_conn->call_list;
- if (!call || !call->replies) {
- return;
- }
-
- while (call->replies) {
- struct data_blob_list_item *rep = call->replies;
- struct dcesrv_sock_reply_state *substate;
- struct tevent_req *subreq;
-
- substate = talloc_zero(call, struct dcesrv_sock_reply_state);
- if (!substate) {
- dcesrv_terminate_connection(dce_conn, "no memory");
- return;
- }
-
- substate->dce_conn = dce_conn;
- substate->call = NULL;
-
- DLIST_REMOVE(call->replies, rep);
-
- if (call->replies == NULL && call->terminate_reason == NULL) {
- substate->call = call;
- }
-
- substate->iov.iov_base = (void *) rep->blob.data;
- substate->iov.iov_len = rep->blob.length;
-
- subreq = tstream_writev_queue_send(substate,
- dce_conn->event_ctx,
- dce_conn->stream,
- dce_conn->send_queue,
- &substate->iov, 1);
- if (!subreq) {
- dcesrv_terminate_connection(dce_conn, "no memory");
- return;
- }
- tevent_req_set_callback(subreq, dcesrv_sock_reply_done,
- substate);
- }
-
- if (call->terminate_reason != NULL) {
- struct tevent_req *subreq;
-
- subreq = tevent_queue_wait_send(call,
- dce_conn->event_ctx,
- dce_conn->send_queue);
- if (!subreq) {
- dcesrv_terminate_connection(dce_conn, __location__);
- return;
- }
- tevent_req_set_callback(subreq, dcesrv_call_terminate_step1,
- call);
- }
-
- DLIST_REMOVE(call->conn->call_list, call);
- call->list = DCESRV_LIST_NONE;
-}
-
-static void dcesrv_sock_reply_done(struct tevent_req *subreq)
-{
- struct dcesrv_sock_reply_state *substate = tevent_req_callback_data(subreq,
- struct dcesrv_sock_reply_state);
- int ret;
- int sys_errno;
- NTSTATUS status;
- struct dcesrv_call_state *call = substate->call;
-
- ret = tstream_writev_queue_recv(subreq, &sys_errno);
- TALLOC_FREE(subreq);
- if (ret == -1) {
- status = map_nt_error_from_unix_common(sys_errno);
- dcesrv_terminate_connection(substate->dce_conn, nt_errstr(status));
- return;
- }
-
- talloc_free(substate);
- if (call) {
- talloc_free(call);
- }
-}
-
-static void dcesrv_call_terminate_step2(struct tevent_req *subreq);
-
-static void dcesrv_call_terminate_step1(struct tevent_req *subreq)
-{
- struct dcesrv_call_state *call = tevent_req_callback_data(subreq,
- struct dcesrv_call_state);
- bool ok;
- struct timeval tv;
-
- /* make sure we stop send queue before removing subreq */
- tevent_queue_stop(call->conn->send_queue);
-
- ok = tevent_queue_wait_recv(subreq);
- TALLOC_FREE(subreq);
- if (!ok) {
- dcesrv_terminate_connection(call->conn, __location__);
- return;
- }
-
- /* disconnect after 200 usecs */
- tv = timeval_current_ofs_usec(200);
- subreq = tevent_wakeup_send(call, call->conn->event_ctx, tv);
- if (subreq == NULL) {
- dcesrv_terminate_connection(call->conn, __location__);
- return;
- }
- tevent_req_set_callback(subreq, dcesrv_call_terminate_step2,
- call);
-}
-
-static void dcesrv_call_terminate_step2(struct tevent_req *subreq)
-{
- struct dcesrv_call_state *call = tevent_req_callback_data(subreq,
- struct dcesrv_call_state);
- bool ok;
-
- ok = tevent_wakeup_recv(subreq);
- TALLOC_FREE(subreq);
- if (!ok) {
- dcesrv_terminate_connection(call->conn, __location__);
- return;
- }
-
- dcesrv_terminate_connection(call->conn, call->terminate_reason);
-}
-
struct dcesrv_socket_context {
const struct dcesrv_endpoint *endpoint;
struct dcesrv_context *dcesrv_ctx;
return;
}
-static void dcesrv_conn_wait_done(struct tevent_req *subreq);
-
-static void dcesrv_read_fragment_done(struct tevent_req *subreq)
-{
- struct dcesrv_connection *dce_conn = tevent_req_callback_data(subreq,
- struct dcesrv_connection);
- struct dcesrv_context *dce_ctx = dce_conn->dce_ctx;
- struct ncacn_packet *pkt;
- DATA_BLOB buffer;
- NTSTATUS status;
-
- if (dce_conn->terminate) {
- /*
- * if the current connection is broken
- * we need to clean it up before any other connection
- */
- dcesrv_terminate_connection(dce_conn, dce_conn->terminate);
- dcesrv_cleanup_broken_connections(dce_ctx);
- return;
- }
-
- dcesrv_cleanup_broken_connections(dce_ctx);
-
- status = dcerpc_read_ncacn_packet_recv(subreq, dce_conn,
- &pkt, &buffer);
- TALLOC_FREE(subreq);
- if (!NT_STATUS_IS_OK(status)) {
- dcesrv_terminate_connection(dce_conn, nt_errstr(status));
- return;
- }
-
- status = dcesrv_process_ncacn_packet(dce_conn, pkt, buffer);
- if (!NT_STATUS_IS_OK(status)) {
- dcesrv_terminate_connection(dce_conn, nt_errstr(status));
- return;
- }
-
- /*
- * This is used to block the connection during
- * pending authentication.
- */
- if (dce_conn->wait_send != NULL) {
- subreq = dce_conn->wait_send(dce_conn,
- dce_conn->event_ctx,
- dce_conn->wait_private);
- if (!subreq) {
- status = NT_STATUS_NO_MEMORY;
- dcesrv_terminate_connection(dce_conn, nt_errstr(status));
- return;
- }
- tevent_req_set_callback(subreq, dcesrv_conn_wait_done, dce_conn);
- return;
- }
-
- subreq = dcerpc_read_ncacn_packet_send(dce_conn,
- dce_conn->event_ctx,
- dce_conn->stream);
- if (!subreq) {
- status = NT_STATUS_NO_MEMORY;
- dcesrv_terminate_connection(dce_conn, nt_errstr(status));
- return;
- }
- tevent_req_set_callback(subreq, dcesrv_read_fragment_done, dce_conn);
-}
-
-static void dcesrv_conn_wait_done(struct tevent_req *subreq)
-{
- struct dcesrv_connection *dce_conn = tevent_req_callback_data(subreq,
- struct dcesrv_connection);
- struct dcesrv_context *dce_ctx = dce_conn->dce_ctx;
- NTSTATUS status;
-
- if (dce_conn->terminate) {
- /*
- * if the current connection is broken
- * we need to clean it up before any other connection
- */
- dcesrv_terminate_connection(dce_conn, dce_conn->terminate);
- dcesrv_cleanup_broken_connections(dce_ctx);
- return;
- }
-
- dcesrv_cleanup_broken_connections(dce_ctx);
-
- status = dce_conn->wait_recv(subreq);
- dce_conn->wait_send = NULL;
- dce_conn->wait_recv = NULL;
- dce_conn->wait_private = NULL;
- TALLOC_FREE(subreq);
- if (!NT_STATUS_IS_OK(status)) {
- dcesrv_terminate_connection(dce_conn, nt_errstr(status));
- return;
- }
-
- status = dcesrv_connection_loop_start(dce_conn);
- if (!NT_STATUS_IS_OK(status)) {
- dcesrv_terminate_connection(dce_conn, nt_errstr(status));
- return;
- }
-}
-
static void dcesrv_sock_recv(struct stream_connection *conn, uint16_t flags)
{
struct dcesrv_connection *dce_conn = talloc_get_type(conn->private_data,
}
}
-
-/**
- * retrieve credentials from a dce_call
- */
-_PUBLIC_ struct cli_credentials *dcesrv_call_credentials(struct dcesrv_call_state *dce_call)
-{
- struct dcesrv_auth *auth = dce_call->auth_state;
- SMB_ASSERT(auth->auth_finished);
- return auth->session_info->credentials;
-}
-
-/**
- * returns true if this is an authenticated call
- */
-_PUBLIC_ bool dcesrv_call_authenticated(struct dcesrv_call_state *dce_call)
-{
- struct dcesrv_auth *auth = dce_call->auth_state;
- enum security_user_level level;
- SMB_ASSERT(auth->auth_finished);
- level = security_session_user_level(auth->session_info, NULL);
- return level >= SECURITY_USER;
-}
-
-/**
- * retrieve account_name for a dce_call
- */
-_PUBLIC_ const char *dcesrv_call_account_name(struct dcesrv_call_state *dce_call)
-{
- struct dcesrv_auth *auth = dce_call->auth_state;
- SMB_ASSERT(auth->auth_finished);
- return auth->session_info->info->account_name;
-}
-
-/**
- * retrieve session_info from a dce_call
- */
-_PUBLIC_ struct auth_session_info *dcesrv_call_session_info(struct dcesrv_call_state *dce_call)
-{
- struct dcesrv_auth *auth = dce_call->auth_state;
- SMB_ASSERT(auth->auth_finished);
- return auth->session_info;
-}
-
-/**
- * retrieve auth type/level from a dce_call
- */
-_PUBLIC_ void dcesrv_call_auth_info(struct dcesrv_call_state *dce_call,
- enum dcerpc_AuthType *auth_type,
- enum dcerpc_AuthLevel *auth_level)
-{
- struct dcesrv_auth *auth = dce_call->auth_state;
-
- SMB_ASSERT(auth->auth_finished);
-
- if (auth_type != NULL) {
- *auth_type = auth->auth_type;
- }
- if (auth_level != NULL) {
- *auth_level = auth->auth_level;
- }
-}
-
_PUBLIC_ struct imessaging_context *dcesrv_imessaging_context(
struct dcesrv_connection *conn)
{
struct stream_connection);
stream_terminate_connection(srv_conn, reason);
}
-
-_PUBLIC_ NTSTATUS dcesrv_connection_loop_start(struct dcesrv_connection *conn)
-{
- struct tevent_req *subreq;
-
- subreq = dcerpc_read_ncacn_packet_send(conn,
- conn->event_ctx,
- conn->stream);
- if (subreq == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
- tevent_req_set_callback(subreq, dcesrv_read_fragment_done, conn);
-
- return NT_STATUS_OK;
-}
git.samba.org / metze / samba / wip.git / commitdiff