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Annotation of 43BSDReno/kerberosIV/krb/mk_err.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * $Source: /usr/src/kerberosIV/krb/RCS/mk_err.c,v $
                      3:  * $Author: kfall $
                      4:  *
                      5:  * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
                      6:  * of Technology.
                      7:  *
                      8:  * For copying and distribution information, please see the file
                      9:  * <mit-copyright.h>.
                     10:  */
                     11: 
                     12: #ifndef lint
                     13: static char *rcsid_mk_err_c =
                     14: "$Header: /usr/src/kerberosIV/krb/RCS/mk_err.c,v 4.5 90/06/25 20:56:53 kfall Exp $";
                     15: #endif /* lint */
                     16: 
                     17: #include <mit-copyright.h>
                     18: #include <sys/types.h>
                     19: #include <des.h>
                     20: #include <krb.h>
                     21: #include <prot.h>
                     22: #include <strings.h>
                     23: 
                     24: /*
                     25:  * This routine creates a general purpose error reply message.  It
                     26:  * doesn't use KTEXT because application protocol may have long
                     27:  * messages, and may want this part of buffer contiguous to other
                     28:  * stuff.
                     29:  *
                     30:  * The error reply is built in "p", using the error code "e" and
                     31:  * error text "e_string" given.  The length of the error reply is
                     32:  * returned.
                     33:  *
                     34:  * The error reply is in the following format:
                     35:  *
                     36:  * unsigned char       KRB_PROT_VERSION        protocol version no.
                     37:  * unsigned char       AUTH_MSG_APPL_ERR       message type
                     38:  * (least significant
                     39:  * bit of above)       HOST_BYTE_ORDER         local byte order
                     40:  * 4 bytes             e                       given error code
                     41:  * string              e_string                given error text
                     42:  */
                     43: 
                     44: long krb_mk_err(p,e,e_string)
                     45:     u_char *p;                 /* Where to build error packet */
                     46:     long e;                    /* Error code */
                     47:     char *e_string;            /* Text of error */
                     48: {
                     49:     u_char      *start;
                     50: 
                     51:     start = p;
                     52: 
                     53:     /* Create fixed part of packet */
                     54:     *p++ = (unsigned char) KRB_PROT_VERSION;
                     55:     *p = (unsigned char) AUTH_MSG_APPL_ERR;
                     56:     *p++ |= HOST_BYTE_ORDER;
                     57: 
                     58:     /* Add the basic info */
                     59:     bcopy((char *)&e,(char *)p,4); /* err code */
                     60:     p += sizeof(e);
                     61:     (void) strcpy((char *)p,e_string); /* err text */
                     62:     p += strlen(e_string);
                     63: 
                     64:     /* And return the length */
                     65:     return p-start;
                     66: }

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