/*      $NetBSD: clnt_perror.c,v 1.24 2000/06/02 23:11:07 fvdl Exp $    */


/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2009, Sun Microsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice, 
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice, 
 *   this list of conditions and the following disclaimer in the documentation 
 *   and/or other materials provided with the distribution.
 * - Neither the name of Sun Microsystems, Inc. nor the names of its 
 *   contributors may be used to endorse or promote products derived 
 *   from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * clnt_perror.c
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 *
 */
#include "namespace.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <rpc/rpc.h>
#include <rpc/types.h>
#include <rpc/auth.h>
#include <rpc/clnt.h>
#include "un-namespace.h"

static char *buf;

static char *_buf(void);
static char *auth_errmsg(enum auth_stat);
#define CLNT_PERROR_BUFLEN 256

static char *
_buf(void)
{

        if (buf == NULL)
                buf = malloc(CLNT_PERROR_BUFLEN);
        return (buf);
}

/*
 * Print reply error info
 */
char *
clnt_sperror(CLIENT *rpch, const char *s)
{
        struct rpc_err e;
        char *err;
        char *str;
        char *strstart;
        size_t len, i;

        assert(rpch != NULL);
        assert(s != NULL);

        str = _buf(); /* side effect: sets CLNT_PERROR_BUFLEN */
        if (str == NULL)
                return (0);
        len = CLNT_PERROR_BUFLEN;
        strstart = str;
        CLNT_GETERR(rpch, &e);

        if ((i = snprintf(str, len, "%s: ", s)) > 0) {
                str += i;
                len -= i;
        }

        (void)strncpy(str, clnt_sperrno(e.re_status), len - 1);
        i = strlen(str);
        str += i;
        len -= i;

        switch (e.re_status) {
        case RPC_SUCCESS:
        case RPC_CANTENCODEARGS:
        case RPC_CANTDECODERES:
        case RPC_TIMEDOUT:
        case RPC_PROGUNAVAIL:
        case RPC_PROCUNAVAIL:
        case RPC_CANTDECODEARGS:
        case RPC_SYSTEMERROR:
        case RPC_UNKNOWNHOST:
        case RPC_UNKNOWNPROTO:
        case RPC_PMAPFAILURE:
        case RPC_PROGNOTREGISTERED:
        case RPC_FAILED:
                break;

        case RPC_CANTSEND:
        case RPC_CANTRECV:
                i = snprintf(str, len, "; errno = %s", strerror(e.re_errno)); 
                if (i > 0) {
                        str += i;
                        len -= i;
                }
                break;

        case RPC_VERSMISMATCH:
                i = snprintf(str, len, "; low version = %u, high version = %u", 
                        e.re_vers.low, e.re_vers.high);
                if (i > 0) {
                        str += i;
                        len -= i;
                }
                break;

        case RPC_AUTHERROR:
                err = auth_errmsg(e.re_why);
                i = snprintf(str, len, "; why = ");
                if (i > 0) {
                        str += i;
                        len -= i;
                }
                if (err != NULL) {
                        i = snprintf(str, len, "%s",err);
                } else {
                        i = snprintf(str, len,
                                "(unknown authentication error - %d)",
                                (int) e.re_why);
                }
                if (i > 0) {
                        str += i;
                        len -= i;
                }
                break;

        case RPC_PROGVERSMISMATCH:
                i = snprintf(str, len, "; low version = %u, high version = %u", 
                        e.re_vers.low, e.re_vers.high);
                if (i > 0) {
                        str += i;
                        len -= i;
                }
                break;

        default:        /* unknown */
                i = snprintf(str, len, "; s1 = %u, s2 = %u", 
                        e.re_lb.s1, e.re_lb.s2);
                if (i > 0) {
                        str += i;
                        len -= i;
                }
                break;
        }
        strstart[CLNT_PERROR_BUFLEN-1] = '\0';
        return(strstart) ;
}

void
clnt_perror(CLIENT *rpch, const char *s)
{

        assert(rpch != NULL);
        assert(s != NULL);

        (void) fprintf(stderr, "%s\n", clnt_sperror(rpch,s));
}

static const char *const rpc_errlist[] = {
        "RPC: Success",                         /*  0 - RPC_SUCCESS */
        "RPC: Can't encode arguments",          /*  1 - RPC_CANTENCODEARGS */
        "RPC: Can't decode result",             /*  2 - RPC_CANTDECODERES */
        "RPC: Unable to send",                  /*  3 - RPC_CANTSEND */
        "RPC: Unable to receive",               /*  4 - RPC_CANTRECV */
        "RPC: Timed out",                       /*  5 - RPC_TIMEDOUT */
        "RPC: Incompatible versions of RPC",    /*  6 - RPC_VERSMISMATCH */
        "RPC: Authentication error",            /*  7 - RPC_AUTHERROR */
        "RPC: Program unavailable",             /*  8 - RPC_PROGUNAVAIL */
        "RPC: Program/version mismatch",        /*  9 - RPC_PROGVERSMISMATCH */
        "RPC: Procedure unavailable",           /* 10 - RPC_PROCUNAVAIL */
        "RPC: Server can't decode arguments",   /* 11 - RPC_CANTDECODEARGS */
        "RPC: Remote system error",             /* 12 - RPC_SYSTEMERROR */
        "RPC: Unknown host",                    /* 13 - RPC_UNKNOWNHOST */
        "RPC: Port mapper failure",             /* 14 - RPC_PMAPFAILURE */
        "RPC: Program not registered",          /* 15 - RPC_PROGNOTREGISTERED */
        "RPC: Failed (unspecified error)",      /* 16 - RPC_FAILED */
        "RPC: Unknown protocol"                 /* 17 - RPC_UNKNOWNPROTO */
};


/*
 * This interface for use by clntrpc
 */
char *
clnt_sperrno(enum clnt_stat stat)
{
        unsigned int errnum = stat;

        if (errnum < (sizeof(rpc_errlist)/sizeof(rpc_errlist[0])))
                /* LINTED interface problem */
                return (char *)rpc_errlist[errnum];

        return ("RPC: (unknown error code)");
}

void
clnt_perrno(enum clnt_stat num)
{
        (void) fprintf(stderr, "%s\n", clnt_sperrno(num));
}


char *
clnt_spcreateerror(const char *s)
{
        char *str;
        size_t len, i;

        assert(s != NULL);

        str = _buf(); /* side effect: sets CLNT_PERROR_BUFLEN */
        if (str == NULL)
                return(0);
        len = CLNT_PERROR_BUFLEN;
        i = snprintf(str, len, "%s: ", s);
        if (i > 0)
                len -= i;
        (void)strncat(str, clnt_sperrno(rpc_createerr.cf_stat), len - 1);
        switch (rpc_createerr.cf_stat) {
        case RPC_PMAPFAILURE:
                (void) strncat(str, " - ", len - 1);
                (void) strncat(str,
                    clnt_sperrno(rpc_createerr.cf_error.re_status), len - 4);
                break;

        case RPC_SYSTEMERROR:
                (void)strncat(str, " - ", len - 1);
                (void)strncat(str, strerror(rpc_createerr.cf_error.re_errno),
                    len - 4);
                break;

        case RPC_CANTSEND:
        case RPC_CANTDECODERES:
        case RPC_CANTENCODEARGS:
        case RPC_SUCCESS:
        case RPC_UNKNOWNPROTO:
        case RPC_PROGNOTREGISTERED:
        case RPC_FAILED:
        case RPC_UNKNOWNHOST:
        case RPC_CANTDECODEARGS:
        case RPC_PROCUNAVAIL:
        case RPC_PROGVERSMISMATCH:
        case RPC_PROGUNAVAIL:
        case RPC_AUTHERROR:
        case RPC_VERSMISMATCH:
        case RPC_TIMEDOUT:
        case RPC_CANTRECV:
        default:
                break;
        }
        str[CLNT_PERROR_BUFLEN-1] = '\0';
        return (str);
}

void
clnt_pcreateerror(const char *s)
{

        assert(s != NULL);

        (void) fprintf(stderr, "%s\n", clnt_spcreateerror(s));
}

static const char *const auth_errlist[] = {
        "Authentication OK",                    /* 0 - AUTH_OK */
        "Invalid client credential",            /* 1 - AUTH_BADCRED */
        "Server rejected credential",           /* 2 - AUTH_REJECTEDCRED */
        "Invalid client verifier",              /* 3 - AUTH_BADVERF */
        "Server rejected verifier",             /* 4 - AUTH_REJECTEDVERF */
        "Client credential too weak",           /* 5 - AUTH_TOOWEAK */
        "Invalid server verifier",              /* 6 - AUTH_INVALIDRESP */
        "Failed (unspecified error)",           /* 7 - AUTH_FAILED */
        "Kerberos generic error",               /* 8 - AUTH_KERB_GENERIC*/
        "Kerberos credential expired",          /* 9 - AUTH_TIMEEXPIRE */
        "Bad kerberos ticket file",             /* 10 - AUTH_TKT_FILE */
        "Can't decode kerberos authenticator",  /* 11 - AUTH_DECODE */
        "Address wrong in kerberos ticket",     /* 12 - AUTH_NET_ADDR */
        "GSS-API crediential problem",          /* 13 - RPCSEC_GSS_CREDPROBLEM */
        "GSS-API context problem"               /* 14 - RPCSEC_GSS_CTXPROBLEM */
};

static char *
auth_errmsg(enum auth_stat stat)
{
        unsigned int errnum = stat;

        if (errnum < (sizeof(auth_errlist)/sizeof(auth_errlist[0])))
                /* LINTED interface problem */
                return (char *)auth_errlist[errnum];

        return(NULL);
}