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, 131 insertions, 0 deletions

diff --git a/xlators/protocol/rpc/rpc-lib/src/xdr-rpcclnt.c b/xlators/protocol/rpc/rpc-lib/src/xdr-rpcclnt.c
new file mode 100644
index 00000000000..98676ae61ab
--- /dev/null
+++ b/xlators/protocol/rpc/rpc-lib/src/xdr-rpcclnt.c
@@ -0,0 +1,131 @@
+/*
+  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 _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>
+#include <rpc/auth_unix.h>
+#include <errno.h>
+
+#include "mem-pool.h"
+#include "xdr-rpc.h"
+#include "xdr-common.h"
+#include "logging.h"
+
+/* Decodes the XDR format in msgbuf into rpc_msg.
+ * The remaining payload is returned into payload.
+ */
+int
+xdr_to_rpc_reply (char *msgbuf, size_t len, struct rpc_msg *reply,
+                  struct iovec *payload, char *verfbytes)
+{
+        XDR                     xdr;
+        int                     ret = -1;
+
+        if ((!msgbuf) || (!reply)) {
+                ret = -EINVAL;
+                goto out;
+        }
+
+        memset (reply, 0, sizeof (struct rpc_msg));
+
+        reply->acpted_rply.ar_verf = _null_auth;
+        reply->acpted_rply.ar_results.where = NULL;
+        reply->acpted_rply.ar_results.proc = (xdrproc_t)(xdr_void);
+
+        xdrmem_create (&xdr, msgbuf, len, XDR_DECODE);
+        if (!xdr_replymsg (&xdr, reply)) {
+                ret = -errno;
+                goto out;
+        }
+        if (payload) {
+                payload->iov_base = xdr_decoded_remaining_addr (xdr);
+                payload->iov_len = xdr_decoded_remaining_len (xdr);
+        }
+
+        ret = 0;
+out:
+        return ret;
+}
+
+#if 0
+bool_t
+true_func (XDR *s, caddr_t *a)
+{
+        return TRUE;
+}
+#endif
+
+int
+rpc_request_to_xdr (struct rpc_msg *request, char *dest, size_t len,
+                    struct iovec *dst)
+{
+        XDR xdr;
+        int ret = -1;
+
+        if ((!dest) || (!request) || (!dst)) {
+                goto out;
+        }
+
+        xdrmem_create (&xdr, dest, len, XDR_ENCODE);
+        if (!xdr_callmsg (&xdr, request)) {
+                goto out;
+        }
+
+        dst->iov_base = dest;
+        dst->iov_len = xdr_encoded_length (xdr);
+
+        ret = 0;
+
+out:
+        return ret;
+}
+
+
+int
+auth_unix_cred_to_xdr (struct authunix_parms *au, char *dest, size_t len,
+                       struct iovec *iov)
+{
+        XDR xdr;
+        int ret = -1;
+
+        if (!au || !dest || !iov) {
+                goto out;
+        }
+
+        xdrmem_create (&xdr, dest, len, XDR_DECODE);
+
+        if (!xdr_authunix_parms (&xdr, au)) {
+                goto out;
+        }
+
+        iov->iov_base = dest;
+        iov->iov_len = xdr_encoded_length (xdr);
+
+        ret = 0;
+out:
+        return ret;
+}