decode_mountd.c

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/*
 * decode_mountd.c
 *
 * RPC mountd.
 *
 * Outputs filehandle in nfsshell format. :-)
 *
 * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
 *
 * $Id: decode_mountd.c,v 1.7 2001/03/15 08:33:01 dugsong Exp $
 */
 
#include "config.h"
 
#include <sys/param.h>
#include <sys/types.h>
#include <rpc/rpc.h>
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#include "buf.h"
#include "mount.h"
#include "rpc.h"
#include "decode.h"
 
int
decode_mountd(u_char *buf, int len, u_char *obuf, int olen)
{
    XDR xdrs;
    struct buf outbuf;
    struct rpc_msg msg;
    struct xid_map *xm;
    struct fhstatus fhstat;
    char *p, *dir;
    int i, hdrlen;
 
    buf_init(&outbuf, obuf, olen);
    
    if ((hdrlen = rpc_decode(buf, len, &msg)) == 0)
        return (0);
 
    if (msg.rm_direction == CALL &&
        msg.rm_call.cb_prog == MOUNTPROG &&
        msg.rm_call.cb_proc == MOUNTPROC_MNT) {
        xdrmem_create(&xdrs, buf + hdrlen, len - hdrlen, XDR_DECODE);
        dir = NULL;
        if (xdr_string(&xdrs, &dir, MAXPATHLEN)) {
            xid_map_enter(msg.rm_xid, MOUNTPROG, MOUNTVERS,
                      MOUNTPROC_MNT, (void *) dir);
        }
        xdr_destroy(&xdrs);
    }
    else if (msg.rm_direction == REPLY &&
         (xm = xid_map_find(msg.rm_xid)) != NULL) {
        if (msg.rm_reply.rp_stat == MSG_ACCEPTED &&
            msg.acpted_rply.ar_stat == SUCCESS) {
            xdrmem_create(&xdrs, buf + hdrlen, len - hdrlen,
                      XDR_DECODE);
            if (xdr_fhstatus(&xdrs, &fhstat)) {
                if (fhstat.fhs_status == 0) {
                    buf_putf(&outbuf, "%s [",
                         (char *)xm->data);
                    
                    p = fhstat.fhstatus_u.fhs_fhandle;
                    
                    for (i = 0; i < FHSIZE; i++) {
                        buf_putf(&outbuf, "%.2x ",
                             p[i] & 0xff);
                    }
                    buf_put(&outbuf, "]\n", 2);
                }
            }
            xdr_destroy(&xdrs);
        }
        free(xm->data);
        memset(xm, 0, sizeof(*xm));
    }
    buf_end(&outbuf);
    
    return (buf_len(&outbuf));
}