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- /*
- * $Source: /usr/src/kerberosIV/krb/RCS/rd_err.c,v $
- * $Author: kfall $
- *
- * Copyright 1986, 1987, 1988 by the Massachusetts Institute
- * of Technology.
- *
- * For copying and distribution information, please see the file
- * <mit-copyright.h>.
- *
- * This routine dissects a a Kerberos 'safe msg',
- * checking its integrity, and returning a pointer to the application
- * data contained and its length.
- *
- * Returns 0 (RD_AP_OK) for success or an error code (RD_AP_...)
- *
- * Steve Miller Project Athena MIT/DEC
- */
-
- #ifndef lint
- static char *rcsid_rd_err_c=
- "$Header: /usr/src/kerberosIV/krb/RCS/rd_err.c,v 4.6 90/06/25 20:57:10 kfall Exp $";
- #endif /* lint */
-
- #include <mit-copyright.h>
-
- /* system include files */
- #include <stdio.h>
- #include <errno.h>
- #include <sys/types.h>
- #include <netinet/in.h>
- #include <sys/time.h>
-
- /* application include files */
- #include <des.h>
- #include <krb.h>
- #include <prot.h>
-
- /*
- * Given an AUTH_MSG_APPL_ERR message, "in" and its length "in_length",
- * return the error code from the message in "code" and the text in
- * "m_data" as follows:
- *
- * m_data->app_data points to the error text
- * m_data->app_length points to the length of the error text
- *
- * If all goes well, return RD_AP_OK. If the version number
- * is wrong, return RD_AP_VERSION, and if it's not an AUTH_MSG_APPL_ERR
- * type message, return RD_AP_MSG_TYPE.
- *
- * The AUTH_MSG_APPL_ERR message format can be found in mk_err.c
- */
-
- int
- krb_rd_err(in,in_length,code,m_data)
- u_char *in; /* pointer to the msg received */
- u_long in_length; /* of in msg */
- long *code; /* received error code */
- MSG_DAT *m_data;
- {
- register u_char *p;
- int swap_bytes = 0;
- p = in; /* beginning of message */
-
- if (*p++ != KRB_PROT_VERSION)
- return(RD_AP_VERSION);
- if (((*p) & ~1) != AUTH_MSG_APPL_ERR)
- return(RD_AP_MSG_TYPE);
- if ((*p++ & 1) != HOST_BYTE_ORDER)
- swap_bytes++;
-
- /* safely get code */
- bcopy((char *)p,(char *)code,sizeof(*code));
- if (swap_bytes)
- swap_u_long(*code);
- p += sizeof(*code); /* skip over */
-
- m_data->app_data = p; /* we're now at the error text
- * message */
- m_data->app_length = in_length;
-
- return(RD_AP_OK); /* OK == 0 */
- }
-