rpc protocol

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Raghavendra G <raghavendra@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 875 (Implement a new protocol to provide proper backward/forward compatibility)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=875

1 files changed, 74 insertions, 0 deletions

diff --git a/xlators/protocol/rpc/rpc-lib/src/xdr-rpc.h b/xlators/protocol/rpc/rpc-lib/src/xdr-rpc.h
new file mode 100644
index 000000000..4c0ee69b1
--- /dev/null
+++ b/xlators/protocol/rpc/rpc-lib/src/xdr-rpc.h
@@ -0,0 +1,74 @@
+/*
+  Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _XDR_RPC_H
+#define _XDR_RPC_H_
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include <rpc/rpc.h>
+#include <rpc/pmap_clnt.h>
+#include <arpa/inet.h>
+#include <rpc/xdr.h>
+#include <sys/uio.h>
+
+/* Converts a given network buffer from its XDR format to a structure
+ * that contains everything an RPC call needs to work.
+ */
+extern int
+xdr_to_rpc_call (char *msgbuf, size_t len, struct rpc_msg *call,
+                 struct iovec *payload, char *credbytes, char *verfbytes);
+
+extern int
+rpc_fill_empty_reply (struct rpc_msg *reply, uint32_t xid);
+
+extern int
+rpc_fill_denied_reply (struct rpc_msg *reply, int rjstat, int auth_err);
+
+extern int
+rpc_fill_accepted_reply (struct rpc_msg *reply, int arstat, int proglow,
+                         int proghigh, int verf, int len, char *vdata);
+extern int
+rpc_reply_to_xdr (struct rpc_msg *reply, char *dest, size_t len,
+                  struct iovec *dst);
+
+extern int
+xdr_to_auth_unix_cred (char *msgbuf, int msglen, struct authunix_parms *au,
+                       char *machname, gid_t *gids);
+/* Macros that simplify accesing the members of an RPC call structure. */
+#define rpc_call_xid(call)              ((call)->rm_xid)
+#define rpc_call_direction(call)        ((call)->rm_direction)
+#define rpc_call_rpcvers(call)          ((call)->ru.RM_cmb.cb_rpcvers)
+#define rpc_call_program(call)          ((call)->ru.RM_cmb.cb_prog)
+#define rpc_call_progver(call)          ((call)->ru.RM_cmb.cb_vers)
+#define rpc_call_progproc(call)         ((call)->ru.RM_cmb.cb_proc)
+#define rpc_opaque_auth_flavour(oa)     ((oa)->oa_flavor)
+#define rpc_opaque_auth_len(oa)         ((oa)->oa_length)
+
+#define rpc_call_cred_flavour(call)     (rpc_opaque_auth_flavour ((&(call)->ru.RM_cmb.cb_cred)))
+#define rpc_call_cred_len(call)         (rpc_opaque_auth_len ((&(call)->ru.RM_cmb.cb_cred)))
+
+
+#define rpc_call_verf_flavour(call)     (rpc_opaque_auth_flavour ((&(call)->ru.RM_cmb.cb_verf)))
+#define rpc_call_verf_len(call)         (rpc_opaque_auth_len ((&(call)->ru.RM_cmb.cb_verf)))
+
+#endif