Randomize RPC xid.

diff --git a/sys/nfs/krpc_subr.c b/sys/nfs/krpc_subr.c
index 4336e8a..13fd92f 100644 (file)
--- a/sys/nfs/krpc_subr.c
+++ b/sys/nfs/krpc_subr.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: krpc_subr.c,v 1.6 1997/04/25 09:22:34 deraadt Exp $   */
+/*     $OpenBSD: krpc_subr.c,v 1.7 1997/04/27 23:06:01 angelos Exp $   */
 /*     $NetBSD: krpc_subr.c,v 1.12.4.1 1996/06/07 00:52:26 cgd Exp $   */
 
 /*
@@ -60,6 +60,7 @@
 #include <nfs/rpcv2.h>
 #include <nfs/krpc.h>
 #include <nfs/xdr_subs.h>
+#include <dev/rndvar.h>
 
 /*
  * Kernel support for Sun RPC
@@ -200,7 +201,8 @@ krpc_call(sa, prog, vers, func, data, from_p)
        struct rpc_reply *reply;
        struct uio auio;
        int error, rcvflg, timo, secs, len;
-       static u_int32_t xid = ~0xFF;
+       static u_int32_t xid = 0;
+       u_int32_t newxid;
        u_int16_t tport;
 
        /*
@@ -296,7 +298,8 @@ krpc_call(sa, prog, vers, func, data, from_p)
        mhead->m_len = sizeof(*call);
        bzero((caddr_t)call, sizeof(*call));
        /* rpc_call part */
-       xid++;
+       while ((newxid = arc4random()) == xid);
+       xid = newxid;
        call->rp_xid = txdr_unsigned(xid);
        /* call->rp_direction = 0; */
        call->rp_rpcvers = txdr_unsigned(2);