/* * $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 */ }