/* check if this endpoint exists
*/
if ((ep=find_endpoint(dce_ctx, binding))==NULL) {
- ep = talloc(dce_ctx, struct dcesrv_endpoint);
+ ep = talloc_zero(dce_ctx, struct dcesrv_endpoint);
if (!ep) {
return NT_STATUS_NO_MEMORY;
}
add_ep = true;
/* add mgmt interface */
- ifl = talloc(ep, struct dcesrv_if_list);
+ ifl = talloc_zero(ep, struct dcesrv_if_list);
if (!ifl) {
return NT_STATUS_NO_MEMORY;
}
}
/* talloc a new interface list element */
- ifl = talloc(ep, struct dcesrv_if_list);
+ ifl = talloc_zero(ep, struct dcesrv_if_list);
if (!ifl) {
return NT_STATUS_NO_MEMORY;
}
p->msg_ctx = msg_ctx;
p->server_id = server_id;
p->state_flags = state_flags;
+ p->allow_bind = true;
+ p->max_recv_frag = 5840;
+ p->max_xmit_frag = 5840;
*_p = p;
return NT_STATUS_OK;
}
}
+static void dcesrv_call_disconnect_after(struct dcesrv_call_state *call,
+ const char *reason)
+{
+ if (call->conn->terminate != NULL) {
+ return;
+ }
+
+ call->conn->allow_bind = false;
+ call->conn->allow_alter = false;
+ call->conn->allow_auth3 = false;
+ call->conn->allow_request = false;
+
+ call->terminate_reason = talloc_strdup(call, reason);
+ if (call->terminate_reason == NULL) {
+ call->terminate_reason = __location__;
+ }
+}
/*
return a dcerpc bind_nak
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));
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_null;
+ pkt.u.bind_nak._pad = data_blob_const(_pad, sizeof(_pad));
- rep = talloc(call, struct data_blob_list_item);
+ rep = talloc_zero(call, struct data_blob_list_item);
if (!rep) {
return NT_STATUS_NO_MEMORY;
}
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);
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_call_state *dce_call,
+ const struct dcesrv_interface *iface)
+{
+ if (dce_call->context == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ dce_call->context->min_auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS dcesrv_interface_bind_require_privacy(struct dcesrv_call_state *dce_call,
+ const struct dcesrv_interface *iface)
+{
+ if (dce_call->context == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ dce_call->context->min_auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
+ return NT_STATUS_OK;
+}
+
+_PUBLIC_ NTSTATUS dcesrv_interface_bind_reject_connect(struct dcesrv_call_state *dce_call,
+ const struct dcesrv_interface *iface)
+{
+ 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;
+
+ if (context == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ 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_call_state *dce_call,
+ const struct dcesrv_interface *iface)
+{
+ 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;
+
+ if (context == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ 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;
+}
+
/*
handle a bind request
*/
uint32_t context_id;
const struct dcesrv_interface *iface;
uint32_t extra_flags = 0;
+ uint16_t max_req = 0;
+ uint16_t max_rep = 0;
+ const char *ep_prefix = "";
+ const char *endpoint = NULL;
+
+ 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;
/*
if provided, check the assoc_group is valid
}
context_id = call->pkt.u.bind.ctx_list[0].context_id;
-
- /* you can't bind twice on one context */
- if (dcesrv_find_context(call->conn, context_id) != NULL) {
- return dcesrv_bind_nak(call, 0);
- }
-
if_version = call->pkt.u.bind.ctx_list[0].abstract_syntax.if_version;
uuid = call->pkt.u.bind.ctx_list[0].abstract_syntax.uuid;
if (iface) {
/* add this context to the list of available context_ids */
- struct dcesrv_connection_context *context = talloc(call->conn,
+ struct dcesrv_connection_context *context = talloc_zero(call->conn,
struct dcesrv_connection_context);
if (context == NULL) {
return dcesrv_bind_nak(call, 0);
call->context = context;
talloc_set_destructor(context, dcesrv_connection_context_destructor);
+ dcesrv_prepare_context_auth(call);
+
status = iface->bind(call, iface, if_version);
if (!NT_STATUS_IS_OK(status)) {
char *uuid_str = GUID_string(call, &uuid);
}
}
- if (call->conn->cli_max_recv_frag == 0) {
- call->conn->cli_max_recv_frag = MIN(0x2000, call->pkt.u.bind.max_recv_frag);
- }
-
if ((call->pkt.pfc_flags & DCERPC_PFC_FLAG_CONC_MPX) &&
(call->state_flags & DCESRV_CALL_STATE_FLAG_MULTIPLEXED)) {
call->context->conn->state_flags |= DCESRV_CALL_STATE_FLAG_MULTIPLEXED;
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->cli_max_recv_frag;
- pkt.u.bind_ack.max_recv_frag = 0x2000;
+ pkt.u.bind_ack.max_xmit_frag = call->conn->max_xmit_frag;
+ pkt.u.bind_ack.max_recv_frag = call->conn->max_recv_frag;
/*
make it possible for iface->bind() to specify the assoc_group_id
}
if (iface) {
- /* FIXME: Use pipe name as specified by endpoint instead of interface name */
- pkt.u.bind_ack.secondary_address = talloc_asprintf(call, "\\PIPE\\%s", iface->name);
- } else {
- pkt.u.bind_ack.secondary_address = "";
+ endpoint = dcerpc_binding_get_string_option(
+ call->conn->endpoint->ep_description,
+ "endpoint");
+ }
+
+ if (endpoint == NULL) {
+ endpoint = "";
+ }
+
+ if (strncasecmp(endpoint, "\\pipe\\", 6) == 0) {
+ /*
+ * TODO: check if this is really needed
+ *
+ * Or if we should fix this in our idl files.
+ */
+ ep_prefix = "\\PIPE\\";
+ endpoint += 6;
+ }
+
+ pkt.u.bind_ack.secondary_address = talloc_asprintf(call, "%s%s",
+ ep_prefix,
+ endpoint);
+ if (pkt.u.bind_ack.secondary_address == NULL) {
+ TALLOC_FREE(call->context);
+ return NT_STATUS_NO_MEMORY;
}
pkt.u.bind_ack.num_results = 1;
- pkt.u.bind_ack.ctx_list = talloc(call, struct dcerpc_ack_ctx);
+ pkt.u.bind_ack.ctx_list = talloc_zero(call, struct dcerpc_ack_ctx);
if (!pkt.u.bind_ack.ctx_list) {
talloc_free(call->context);
call->context = NULL;
return dcesrv_bind_nak(call, 0);
}
- rep = talloc(call, struct data_blob_list_item);
+ rep = talloc_zero(call, struct data_blob_list_item);
if (!rep) {
talloc_free(call->context);
call->context = NULL;
}
status = ncacn_push_auth(&rep->blob, call, &pkt,
- call->conn->auth_state.auth_info);
+ call->out_auth_info);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(call->context);
call->context = NULL;
*/
static NTSTATUS dcesrv_auth3(struct dcesrv_call_state *call)
{
+ NTSTATUS status;
+
+ if (!call->conn->allow_auth3) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ if (call->conn->auth_state.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_auth3(call)) {
- return dcesrv_fault(call, DCERPC_FAULT_OTHER);
+ call->conn->auth_state.auth_invalid = true;
}
talloc_free(call);
}
/* add this context to the list of available context_ids */
- context = talloc(call->conn, struct dcesrv_connection_context);
+ context = talloc_zero(call->conn, struct dcesrv_connection_context);
if (context == NULL) {
return NT_STATUS_NO_MEMORY;
}
call->context = context;
talloc_set_destructor(context, dcesrv_connection_context_destructor);
+ dcesrv_prepare_context_auth(call);
+
status = iface->bind(call, iface, if_version);
if (!NT_STATUS_IS_OK(status)) {
/* we don't want to trigger the iface->unbind() hook */
}
}
pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST | extra_flags;
- pkt.u.alter_resp.max_xmit_frag = 0x2000;
- pkt.u.alter_resp.max_recv_frag = 0x2000;
+ pkt.u.alter_resp.max_xmit_frag = call->conn->max_xmit_frag;
+ pkt.u.alter_resp.max_recv_frag = call->conn->max_recv_frag;
if (result == 0) {
pkt.u.alter_resp.assoc_group_id = call->context->assoc_group->id;
} else {
pkt.u.alter_resp.assoc_group_id = 0;
}
pkt.u.alter_resp.num_results = 1;
- pkt.u.alter_resp.ctx_list = talloc_array(call, struct dcerpc_ack_ctx, 1);
+ pkt.u.alter_resp.ctx_list = talloc_zero(call, struct dcerpc_ack_ctx);
if (!pkt.u.alter_resp.ctx_list) {
return NT_STATUS_NO_MEMORY;
}
status = dcesrv_auth_alter_ack(call, &pkt);
if (!NT_STATUS_IS_OK(status)) {
- if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)
- || NT_STATUS_EQUAL(status, NT_STATUS_LOGON_FAILURE)
- || NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)
- || NT_STATUS_EQUAL(status, NT_STATUS_WRONG_PASSWORD)) {
- return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
- }
- return dcesrv_fault(call, 0);
+ return dcesrv_fault_disconnect(call, DCERPC_FAULT_SEC_PKG_ERROR);
}
- rep = talloc(call, struct data_blob_list_item);
+ rep = talloc_zero(call, struct data_blob_list_item);
if (!rep) {
return NT_STATUS_NO_MEMORY;
}
- status = ncacn_push_auth(&rep->blob, call, &pkt, call->conn->auth_state.auth_info);
+ status = ncacn_push_auth(&rep->blob, call, &pkt, call->out_auth_info);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
static NTSTATUS dcesrv_alter(struct dcesrv_call_state *call)
{
NTSTATUS status;
- uint32_t context_id;
+ const struct dcerpc_ctx_list *ctx = NULL;
+ bool auth_ok = false;
+
+ 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);
+ }
- /* handle any authentication that is being requested */
- if (!dcesrv_auth_alter(call)) {
- /* TODO: work out the right reject code */
- return dcesrv_alter_resp(call,
- DCERPC_BIND_PROVIDER_REJECT,
- DCERPC_BIND_REASON_ASYNTAX);
+ auth_ok = dcesrv_auth_alter(call);
+ if (!auth_ok) {
+ if (call->in_auth_info.auth_type == DCERPC_AUTH_TYPE_NONE) {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_FAULT_ACCESS_DENIED);
+ }
}
- context_id = call->pkt.u.alter.ctx_list[0].context_id;
+ if (call->pkt.u.alter.num_contexts < 1) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
+ ctx = &call->pkt.u.alter.ctx_list[0];
+ if (ctx->num_transfer_syntaxes < 1) {
+ return dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
+ }
/* see if they are asking for a new interface */
- call->context = dcesrv_find_context(call->conn, context_id);
+ call->context = dcesrv_find_context(call->conn, ctx->context_id);
if (!call->context) {
- status = dcesrv_alter_new_context(call, context_id);
+ status = dcesrv_alter_new_context(call, ctx->context_id);
if (!NT_STATUS_IS_OK(status)) {
return dcesrv_alter_resp(call,
DCERPC_BIND_PROVIDER_REJECT,
DCERPC_BIND_REASON_ASYNTAX);
}
+ } else {
+ bool ok;
+
+ ok = ndr_syntax_id_equal(&ctx->abstract_syntax,
+ &call->context->iface->syntax_id);
+ if (!ok) {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ if (ctx->num_transfer_syntaxes != 1) {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
+
+ ok = ndr_syntax_id_equal(&ctx->transfer_syntaxes[0],
+ &ndr_transfer_syntax_ndr);
+ if (!ok) {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
+ }
}
if (call->pkt.u.alter.assoc_group_id != 0 &&
DCERPC_BIND_REASON_ASYNTAX);
}
+ /* handle any authentication that is being requested */
+ if (!auth_ok) {
+ if (call->in_auth_info.auth_type !=
+ call->conn->auth_state.auth_type)
+ {
+ return dcesrv_fault_disconnect(call,
+ DCERPC_FAULT_SEC_PKG_ERROR);
+ }
+ return dcesrv_fault_disconnect(call, DCERPC_FAULT_ACCESS_DENIED);
+ }
+
return dcesrv_alter_resp(call,
DCERPC_BIND_ACK_RESULT_ACCEPTANCE,
DCERPC_BIND_ACK_REASON_NOT_SPECIFIED);
*/
static NTSTATUS dcesrv_request(struct dcesrv_call_state *call)
{
+ const struct dcesrv_endpoint *endpoint = call->conn->endpoint;
+ enum dcerpc_transport_t transport =
+ dcerpc_binding_get_transport(endpoint->ep_description);
struct ndr_pull *pull;
NTSTATUS status;
struct dcesrv_connection_context *context;
+ if (!call->conn->allow_request) {
+ 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 (call->conn->auth_state.gensec_security &&
!gensec_have_feature(call->conn->auth_state.gensec_security, GENSEC_FEATURE_ASYNC_REPLIES)) {
return dcesrv_fault(call, DCERPC_FAULT_UNK_IF);
}
+ switch (call->conn->auth_state.auth_level) {
+ case DCERPC_AUTH_LEVEL_NONE:
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ break;
+ default:
+ if (!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__, context->iface->name,
+ call->conn->auth_state.auth_type,
+ call->conn->auth_state.auth_level,
+ derpc_transport_string_by_transport(transport),
+ addr));
+ return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
+ }
+ break;
+ }
+
+ if (call->conn->auth_state.auth_level < 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__,
+ context->min_auth_level,
+ context->iface->name,
+ call->conn->auth_state.auth_type,
+ call->conn->auth_state.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);
/*
process some input to a dcerpc endpoint server.
*/
-NTSTATUS dcesrv_process_ncacn_packet(struct dcesrv_connection *dce_conn,
- struct ncacn_packet *pkt,
- DATA_BLOB blob)
+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;
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_auth_request(call, &blob)) {
- return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
+ if (call->pkt.ptype == DCERPC_PKT_REQUEST) {
+ if (!call->conn->allow_request) {
+ 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 (!dcesrv_auth_request(call, &blob)) {
+ /*
+ * 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");
+ return dcesrv_fault(call, DCERPC_FAULT_ACCESS_DENIED);
+ }
}
/* see if this is a continued packet */
struct dcesrv_call_state *call2 = call;
uint32_t alloc_size;
- /* we only allow fragmented requests, no other packet types */
- if (call->pkt.ptype != DCERPC_PKT_REQUEST) {
- return dcesrv_fault(call2, DCERPC_FAULT_OTHER);
- }
-
/* this is a continuation of an existing call - find the call
then tack it on the end */
call = dcesrv_find_fragmented_call(dce_conn, call2->pkt.call_id);
if (!call) {
- return dcesrv_fault(call2, DCERPC_FAULT_OTHER);
+ return dcesrv_fault_disconnect(call2,
+ DCERPC_NCA_S_PROTO_ERROR);
}
if (call->pkt.ptype != call2->pkt.ptype) {
/* trying to play silly buggers are we? */
- return dcesrv_fault(call2, DCERPC_NCA_S_PROTO_ERROR);
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
}
if (memcmp(call->pkt.drep, call2->pkt.drep, sizeof(pkt->drep)) != 0) {
- return dcesrv_fault(call2, DCERPC_NCA_S_PROTO_ERROR);
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
}
if (call->pkt.call_id != call2->pkt.call_id) {
- return dcesrv_fault(call2, DCERPC_NCA_S_PROTO_ERROR);
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
}
if (call->pkt.u.request.context_id != call2->pkt.u.request.context_id) {
- return dcesrv_fault(call2, DCERPC_NCA_S_PROTO_ERROR);
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
}
if (call->pkt.u.request.opnum != call2->pkt.u.request.opnum) {
- return dcesrv_fault(call2, DCERPC_NCA_S_PROTO_ERROR);
+ return dcesrv_fault_disconnect(call,
+ DCERPC_NCA_S_PROTO_ERROR);
}
alloc_size = call->pkt.u.request.stub_and_verifier.length +
switch (call->pkt.ptype) {
case DCERPC_PKT_BIND:
- status = dcesrv_bind(call);
+ status = dcesrv_bind_nak(call,
+ DCERPC_BIND_NAK_REASON_NOT_SPECIFIED);
break;
case DCERPC_PKT_AUTH3:
status = dcesrv_auth3(call);
status = dcesrv_request(call);
break;
default:
- status = NT_STATUS_INVALID_PARAMETER;
+ status = dcesrv_fault_disconnect(call, DCERPC_NCA_S_PROTO_ERROR);
break;
}
return NT_STATUS_INTERNAL_ERROR;
}
- dce_ctx = talloc(mem_ctx, struct dcesrv_context);
+ dce_ctx = talloc_zero(mem_ctx, struct dcesrv_context);
NT_STATUS_HAVE_NO_MEMORY(dce_ctx);
if (uid_wrapper_enabled()) {
srv_conn = talloc_get_type(dce_conn->transport.private_data,
struct stream_connection);
+ dce_conn->allow_bind = false;
+ dce_conn->allow_auth3 = false;
+ dce_conn->allow_alter = false;
+ dce_conn->allow_request = false;
+
if (dce_conn->pending_call_list == NULL) {
char *full_reason = talloc_asprintf(dce_conn, "dcesrv: %s", reason);
};
static void dcesrv_sock_reply_done(struct tevent_req *subreq);
+static void dcesrv_call_terminate_step1(struct tevent_req *subreq);
static void dcesrv_sock_report_output_data(struct dcesrv_connection *dce_conn)
{
struct dcesrv_sock_reply_state *substate;
struct tevent_req *subreq;
- substate = talloc(call, struct dcesrv_sock_reply_state);
+ substate = talloc_zero(call, struct dcesrv_sock_reply_state);
if (!substate) {
dcesrv_terminate_connection(dce_conn, "no memory");
return;
DLIST_REMOVE(call->replies, rep);
- if (call->replies == NULL) {
+ if (call->replies == NULL && call->terminate_reason == NULL) {
substate->call = call;
}
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_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;
NTSTATUS status;
const char *endpoint;
- dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
+ dcesrv_sock = talloc_zero(event_ctx, struct dcesrv_socket_context);
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
/* remember the endpoint of this socket */
full_path = talloc_asprintf(dce_ctx, "%s/%s", lpcfg_ncalrpc_dir(lp_ctx),
endpoint);
- dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
+ dcesrv_sock = talloc_zero(event_ctx, struct dcesrv_socket_context);
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
/* remember the endpoint of this socket */
return NT_STATUS_INVALID_PARAMETER;
}
- dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
+ dcesrv_sock = talloc_zero(event_ctx, struct dcesrv_socket_context);
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
/* remember the endpoint of this socket */
port = atoi(endpoint);
}
- dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
+ dcesrv_sock = talloc_zero(event_ctx, struct dcesrv_socket_context);
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
/* remember the endpoint of this socket */
git.samba.org / samba.git / blobdiff