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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/krb5/os/read_msg.c */
/*
* Copyright 1991 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#include "k5-int.h"
#include <errno.h>
krb5_error_code
krb5_read_message(krb5_context context, krb5_pointer fdp, krb5_data *inbuf)
{
krb5_int32 len;
int len2, ilen;
char *buf = NULL;
int fd = *( (int *) fdp);
*inbuf = empty_data();
if ((len2 = krb5_net_read(context, fd, (char *)&len, 4)) != 4)
return((len2 < 0) ? errno : ECONNABORTED);
len = ntohl(len);
if ((len & VALID_UINT_BITS) != (krb5_ui_4) len) /* Overflow size_t??? */
return ENOMEM;
ilen = (int)len;
if (ilen) {
/*
* We may want to include a sanity check here someday....
*/
if (!(buf = malloc(ilen))) {
return(ENOMEM);
}
if ((len2 = krb5_net_read(context, fd, buf, ilen)) != ilen) {
free(buf);
return((len2 < 0) ? errno : ECONNABORTED);
}
}
*inbuf = make_data(buf, ilen);
return(0);
}
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