[nfs] Add support for NFS protocol

Tested-by: Robin Smidsrød <robin@smidsrod.no>
Signed-off-by: Marin Hannache <git@mareo.fr>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 128 insertions, 0 deletions

diff --git a/src/include/ipxe/oncrpc.h b/src/include/ipxe/oncrpc.h
new file mode 100644
index 000000000..76c1260f2
--- /dev/null
+++ b/src/include/ipxe/oncrpc.h
@@ -0,0 +1,128 @@
+#ifndef _IPXE_ONCRPC_H
+#define _IPXE_ONCRPC_H
+
+#include <stdint.h>
+#include <ipxe/interface.h>
+#include <ipxe/iobuf.h>
+
+/** @file
+ *
+ * SUN ONC RPC protocol.
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/** ONC RCP Version */
+#define ONCRPC_VERS 2
+
+/** ONC RPC Null Authentication */
+#define ONCRPC_AUTH_NONE 0
+
+/** ONC RPC System Authentication (also called UNIX Authentication) */
+#define ONCRPC_AUTH_SYS  1
+
+/** Size of an ONC RPC header */
+#define ONCRPC_HEADER_SIZE ( 11 * sizeof ( uint32_t ) )
+
+#define ONCRPC_FIELD( type, value ) { oncrpc_ ## type, { .type = value } }
+#define ONCRPC_SUBFIELD( type, args... ) \
+	{ oncrpc_ ## type, { .type = { args } } }
+
+#define ONCRPC_FIELD_END { oncrpc_none, { } }
+
+/** Enusure that size is a multiple of four */
+#define oncrpc_align( size ) ( ( (size) + 3 ) & ~3 )
+
+/**
+ * Calculate the length of a string, including padding bytes.
+ *
+ * @v str               String
+ * @ret size            Length of the padded string
+ */
+#define oncrpc_strlen( str ) ( oncrpc_align ( strlen ( str ) ) + \
+                               sizeof ( uint32_t ) )
+
+struct oncrpc_cred {
+	uint32_t               flavor;
+	uint32_t               length;
+};
+
+struct oncrpc_cred_sys {
+	struct oncrpc_cred     credential;
+	uint32_t               stamp;
+	char                   *hostname;
+	uint32_t               uid;
+	uint32_t               gid;
+	uint32_t               aux_gid_len;
+	uint32_t               aux_gid[16];
+};
+
+struct oncrpc_reply
+{
+	struct oncrpc_cred      *verifier;
+	uint32_t                rpc_id;
+	uint32_t                reply_state;
+	uint32_t                accept_state;
+	uint32_t                frame_size;
+	struct io_buffer        *data;
+};
+
+struct oncrpc_session {
+	struct oncrpc_reply     pending_reply;
+	struct oncrpc_cred      *credential;
+	struct oncrpc_cred      *verifier;
+	uint32_t                rpc_id;
+	uint32_t                prog_name;
+	uint32_t                prog_vers;
+};
+
+enum oncrpc_field_type {
+	oncrpc_none = 0,
+	oncrpc_int32,
+	oncrpc_int64,
+	oncrpc_str,
+	oncrpc_array,
+	oncrpc_intarray,
+	oncrpc_cred,
+};
+
+union oncrpc_field_value {
+	struct {
+		size_t           length;
+		const void       *ptr;
+	}                        array;
+
+	struct {
+		size_t           length;
+		const uint32_t   *ptr;
+	}                        intarray;
+
+	int64_t                  int64;
+	int32_t                  int32;
+	const char               *str;
+	const struct oncrpc_cred *cred;
+};
+
+struct oncrpc_field {
+	enum oncrpc_field_type       type;
+	union oncrpc_field_value     value;
+};
+
+extern struct oncrpc_cred oncrpc_auth_none;
+
+int oncrpc_init_cred_sys ( struct oncrpc_cred_sys *auth_sys );
+void oncrpc_init_session ( struct oncrpc_session *session,
+                           struct oncrpc_cred *credential,
+                           struct oncrpc_cred *verifier, uint32_t prog_name,
+                           uint32_t prog_vers );
+
+int oncrpc_call ( struct interface *intf, struct oncrpc_session *session,
+                  uint32_t proc_name, const struct oncrpc_field fields[] );
+
+size_t oncrpc_compute_size ( const struct oncrpc_field fields[] );
+
+int oncrpc_get_reply ( struct oncrpc_session *session,
+                       struct oncrpc_reply *reply, struct io_buffer *io_buf );
+
+#endif /* _IPXE_ONCRPC_H */