From fb1ae1eede65c9b7227d8f3da2e27fd720b8b711 Mon Sep 17 00:00:00 2001
From: Joseph Myers <joseph@codesourcery.com>
Date: Fri, 9 Nov 2012 18:21:59 +0000
Subject: Fix sunrpc 64-bit (especially big-endian) issues (bug 14821).

---
 sunrpc/clnt_unix.c | 41 ++++++++++++++++++-----------------------
 1 file changed, 18 insertions(+), 23 deletions(-)

(limited to 'sunrpc/clnt_unix.c')

diff --git a/sunrpc/clnt_unix.c b/sunrpc/clnt_unix.c
index 776ceab484..9b5d7ca822 100644
--- a/sunrpc/clnt_unix.c
+++ b/sunrpc/clnt_unix.c
@@ -338,8 +338,8 @@ static bool_t
 clntunix_control (CLIENT *cl, int request, char *info)
 {
   struct ct_data *ct = (struct ct_data *) cl->cl_private;
-  u_long *mcall_ptr;
   u_long ul;
+  u_int32_t ui32;
 
   switch (request)
     {
@@ -367,24 +367,15 @@ clntunix_control (CLIENT *cl, int request, char *info)
        * first element in the call structure *.
        * This will get the xid of the PREVIOUS call
        */
-#if 0
-      /* This original code has aliasing issues.  */
-      *(u_long *) info = ntohl (*(u_long *)ct->ct_mcall);
-#else
-      mcall_ptr = (u_long *)ct->ct_mcall;
-      ul = ntohl (*mcall_ptr);
+      memcpy (&ui32, ct->ct_mcall, sizeof (ui32));
+      ul = ntohl (ui32);
       memcpy (info, &ul, sizeof (ul));
-#endif
       break;
     case CLSET_XID:
       /* This will set the xid of the NEXT call */
-#if 0
-      /* This original code has aliasing issues.  */
-      *(u_long *) ct->ct_mcall =  htonl (*(u_long *)info - 1);
-#else
-      ul = ntohl (*(u_long *)info - 1);
-      memcpy (ct->ct_mcall, &ul, sizeof (ul));
-#endif
+      memcpy (&ul, info, sizeof (ul));
+      ui32 = htonl (ul - 1);
+      memcpy (ct->ct_mcall, &ui32, sizeof (ui32));
       /* decrement by 1 as clntunix_call() increments once */
       break;
     case CLGET_VERS:
@@ -394,12 +385,14 @@ clntunix_control (CLIENT *cl, int request, char *info)
        * begining of the RPC header. MUST be changed if the
        * call_struct is changed
        */
-      *(u_long *) info = ntohl (*(u_long *) (ct->ct_mcall
-					     + 4 * BYTES_PER_XDR_UNIT));
+      memcpy (&ui32, ct->ct_mcall + 4 * BYTES_PER_XDR_UNIT, sizeof (ui32));
+      ul = ntohl (ui32);
+      memcpy (info, &ul, sizeof (ul));
       break;
     case CLSET_VERS:
-      *(u_long *) (ct->ct_mcall + 4 * BYTES_PER_XDR_UNIT)
-	= htonl (*(u_long *) info);
+      memcpy (&ul, info, sizeof (ul));
+      ui32 = htonl (ul);
+      memcpy (ct->ct_mcall + 4 * BYTES_PER_XDR_UNIT, &ui32, sizeof (ui32));
       break;
     case CLGET_PROG:
       /*
@@ -408,12 +401,14 @@ clntunix_control (CLIENT *cl, int request, char *info)
        * begining of the RPC header. MUST be changed if the
        * call_struct is changed
        */
-      *(u_long *) info = ntohl (*(u_long *) (ct->ct_mcall
-					     + 3 * BYTES_PER_XDR_UNIT));
+      memcpy (&ui32, ct->ct_mcall + 3 * BYTES_PER_XDR_UNIT, sizeof (ui32));
+      ul = ntohl (ui32);
+      memcpy (info, &ul, sizeof (ul));
       break;
     case CLSET_PROG:
-      *(u_long *) (ct->ct_mcall + 3 * BYTES_PER_XDR_UNIT)
-	= htonl(*(u_long *) info);
+      memcpy (&ul, info, sizeof (ul));
+      ui32 = htonl (ul);
+      memcpy (ct->ct_mcall + 3 * BYTES_PER_XDR_UNIT, &ui32, sizeof (ui32));
       break;
     /* The following are only possible with TI-RPC */
     case CLGET_RETRY_TIMEOUT:
-- 
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