/* 
 * sunrpc_hdr.c
 *
 * x-kernel v3.3
 *
 * Copyright (c) 1996,1993,1991,1990  Arizona Board of Regents
 *
 * $Revision: 1.2 $
 * $Date: 1996/06/06 22:25:16 $
 */

#include "xrpc.h"
#include "xkernel.h"
#include "sunrpc_i.h"
#include "xrpc_print.h"


static void
sunrpcHdrStore(hdr, dst, len, arg)
VOID *hdr;
char *dst;
long int len;
VOID *arg;
{
    xTrace1 (sunrpcp, TR_EVENTS, "sunrpcHdrStore: %d", len);
    bcopy(hdr, dst, len);
}

int
sunrpcEncodeHdr(m, hdr)
Msg            *m;
struct rpc_msg *hdr;
{
    static int    first = 1;
    static XDR    xdrs;
    static u_long xdrData[XDRHDRSIZE / sizeof (u_long)]; /*=0;*/
    static int    len;
    char          *buf;
    
    xIfTrace(sunrpcp, 7)
	prpchdr(*hdr, "encode_hdr");
    if (first) {
	xdrmem_create(&xdrs, (char *)xdrData, XDRHDRSIZE, XDR_ENCODE);
	first = 0;
    }
    
    XDR_SETPOS(&xdrs, 0);
    
    /* new stream for each message */
    if (hdr->rm_direction == CALL) { 
	if (!xdr_callmsg(&xdrs, hdr))
	    return -1;
    }
    else {
	if (!xdr_replymsg(&xdrs, hdr))
	    return -1;
    }
    len = (int)XDR_GETPOS(&xdrs);
    xTrace1(sunrpcp, TR_EVENTS, "sunrpcEncodeHdr: len = %d", len);
/*
    msgPush(m, sunrpcHdrStore, (char *)xdrData, len, 0);
 * replaced above line with the following 2 lines to eliminate compiler
 * errors; don't know whether the functionality is the same - SLM
 */
    buf = msgPush(m, len);
    sunrpcHdrStore((char *)xdrData, buf, len, NULL);

    return 0;
}

long
sunrpcHdrLoad(hdr, src, len, arg)
VOID *hdr;
char *src;
long int len;
VOID *arg; 
{
    int 	  end;
    static XDR	  xdrs; /* = 0; */
    static u_long alignedSrc[ XDRHDRSIZE / sizeof (u_long) ];

    xTrace1 (sunrpcp, TR_EVENTS, "sunrpcHdrLoad: %d", len);
    
    if (LONG_ALIGNED(src))
	xdrmem_create(&xdrs, src, len, XDR_DECODE);
    else {
	bcopy(src, (char *)alignedSrc, len);
	xdrmem_create(&xdrs, (char *)alignedSrc, len, XDR_DECODE);
    }
    if (!xdr_callmsg(&xdrs, (struct rpc_msg *)hdr)) {
	XDR_SETPOS(&xdrs, 0);
	if (!xdr_replymsg(&xdrs, (struct rpc_msg *)hdr)) {
	    *(int *)arg = -1;
	    return 0;
	}
    }
    end = (int) XDR_GETPOS(&xdrs);
    xTrace1(sunrpcp, TR_EVENTS, "decode hdr: popping=%d bytes \n", end);
    return end;
}