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/*
* Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
* of Technology.
* For copying and distribution information, please see the file
* <Copyright.MIT>.
*
* from: cr_err_reply.c,v 4.10 89/01/10 11:34:42 steiner Exp $
* $Id$
*/
#if 0
#ifndef lint
static char rcsid[] =
"$Id$";
#endif /* lint */
#endif
#include <sys/types.h>
#include <krb.h>
#include <prot.h>
#include <strings.h>
extern int req_act_vno; /* this is defined in the kerberos
* server code */
/*
* This routine is used by the Kerberos authentication server to
* create an error reply packet to send back to its client.
*
* It takes a pointer to the packet to be built, the name, instance,
* and realm of the principal, the client's timestamp, an error code
* and an error string as arguments. Its return value is undefined.
*
* The packet is built in the following format:
*
* type variable data
* or constant
* ---- ----------- ----
*
* unsigned char req_ack_vno protocol version number
*
* unsigned char AUTH_MSG_ERR_REPLY protocol message type
*
* [least significant HOST_BYTE_ORDER sender's (server's) byte
* bit of above field] order
*
* string pname principal's name
*
* string pinst principal's instance
*
* string prealm principal's realm
*
* unsigned long time_ws client's timestamp
*
* unsigned long e error code
*
* string e_string error text
*/
void
cr_err_reply(pkt,pname,pinst,prealm,time_ws,e,e_string)
KTEXT pkt;
char *pname; /* Principal's name */
char *pinst; /* Principal's instance */
char *prealm; /* Principal's authentication domain */
u_long time_ws; /* Workstation time */
u_long e; /* Error code */
char *e_string; /* Text of error */
{
u_char *v = (u_char *) pkt->dat; /* Prot vers number */
u_char *t = (u_char *)(pkt->dat+1); /* Prot message type */
/* Create fixed part of packet */
*v = (unsigned char) req_act_vno; /* KRB_PROT_VERSION; */
*t = (unsigned char) AUTH_MSG_ERR_REPLY;
*t |= HOST_BYTE_ORDER;
/* Add the basic info */
(void) strcpy((char *) (pkt->dat+2),pname);
pkt->length = 3 + strlen(pname);
(void) strcpy((char *)(pkt->dat+pkt->length),pinst);
pkt->length += 1 + strlen(pinst);
(void) strcpy((char *)(pkt->dat+pkt->length),prealm);
pkt->length += 1 + strlen(prealm);
/* ws timestamp */
bcopy((char *) &time_ws,(char *)(pkt->dat+pkt->length),4);
pkt->length += 4;
/* err code */
bcopy((char *) &e,(char *)(pkt->dat+pkt->length),4);
pkt->length += 4;
/* err text */
(void) strcpy((char *)(pkt->dat+pkt->length),e_string);
pkt->length += 1 + strlen(e_string);
/* And return */
return;
}
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