/* @(#)clnt_perror.c    2.1 88/07/29 4.0 RPCSRC */
/*
 * Copyright (c) 2010, Oracle America, 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 the "Oracle America, 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.
 */
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)clnt_perror.c 1.15 87/10/07 Copyr 1984 Sun Micro";
#endif

/*
 * clnt_perror.c
 */
#include "autoconf.h"
#include <stdio.h>
#include <string.h>
#include <errno.h>

#include <gssrpc/types.h>
#include <gssrpc/auth.h>
#include <gssrpc/clnt.h>

#ifndef HAVE_STRERROR
#ifdef NEED_SYS_ERRLIST
extern char *sys_errlist[];
#endif
extern int sys_nerr;
#undef strerror
#define strerror(N) (((N) > 0 && (N) < sys_nerr) ? sys_errlist[N] : (char *)0)
#endif /* HAVE_STRERROR */
static char *auth_errmsg(enum auth_stat);



static char *buf;

static char *
get_buf(void)
{
        if (buf == NULL)
                buf = (char *)malloc(BUFSIZ);
        return (buf);
}

/*
 * Print reply error info
 */
char *
clnt_sperror(CLIENT *rpch, char *s)
{
        struct rpc_err e;
        char *err;
        char *bufstart = get_buf();
        char *str = bufstart;
        char *strstart = str;
        char *strend;

        if (str == 0)
                return (0);
        strend = str + BUFSIZ;
        CLNT_GETERR(rpch, &e);

        strncpy (str, s, BUFSIZ - 1);
        str[BUFSIZ - 1] = 0;
        strncat (str, ": ", BUFSIZ - 1 - strlen (bufstart));
        str += strlen(str);
        strncat (str, clnt_sperrno(e.re_status), BUFSIZ - 1 - strlen (bufstart));
        strstart[BUFSIZ - 1] = '\0';
        str += strlen(str);

        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:
                /* 10 for the string */
                if (str - bufstart + 10 + strlen(strerror(e.re_errno)) < BUFSIZ)
                    (void) snprintf(str, strend-str, "; errno = %s",
                                    strerror(e.re_errno));
                str += strlen(str);
                break;

        case RPC_VERSMISMATCH:
                /* 33 for the string, 22 for the numbers */
                if(str - bufstart + 33 + 22 < BUFSIZ)
                    (void) snprintf(str, strend-str,
                                    "; low version = %lu, high version = %lu",
                                    (u_long) e.re_vers.low,
                                    (u_long) e.re_vers.high);
                str += strlen(str);
                break;

        case RPC_AUTHERROR:
                err = auth_errmsg(e.re_why);
                /* 8 for the string */
                if(str - bufstart + 8 < BUFSIZ)
                    (void) snprintf(str, strend-str, "; why = ");
                str += strlen(str);
                if (err != NULL) {
                        if(str - bufstart + strlen(err) < BUFSIZ)
                            (void) snprintf(str, strend-str, "%s",err);
                } else {
                    /* 33 for the string, 11 for the number */
                    if(str - bufstart + 33 + 11 < BUFSIZ)
                        (void) snprintf(str, strend-str,
                                        "(unknown authentication error - %d)",
                                        (int) e.re_why);
                }
                str += strlen(str);
                break;

        case RPC_PROGVERSMISMATCH:
                /* 33 for the string, 22 for the numbers */
                if(str - bufstart + 33 + 22 < BUFSIZ)
                    (void) snprintf(str, strend-str,
                                    "; low version = %lu, high version = %lu",
                                    (u_long) e.re_vers.low,
                                    (u_long) e.re_vers.high);
                str += strlen(str);
                break;

        default:        /* unknown */
                /* 14 for the string, 22 for the numbers */
                if(str - bufstart + 14 + 22 < BUFSIZ)
                    (void) snprintf(str, strend-str,
                                    "; s1 = %lu, s2 = %lu",
                                    (u_long) e.re_lb.s1,
                                    (u_long) e.re_lb.s2);
                str += strlen(str);
                break;
        }
        if (str - bufstart + 1 < BUFSIZ)
            (void) snprintf(str, strend-str, "\n");
        return(strstart) ;
}

void
clnt_perror(CLIENT *rpch, char *s)
{
        (void) fprintf(stderr,"%s",clnt_sperror(rpch,s));
}


struct rpc_errtab {
        enum clnt_stat status;
        char *message;
};

static struct rpc_errtab  rpc_errlist[] = {
        { RPC_SUCCESS,
                "RPC: Success" },
        { RPC_CANTENCODEARGS,
                "RPC: Can't encode arguments" },
        { RPC_CANTDECODERES,
                "RPC: Can't decode result" },
        { RPC_CANTSEND,
                "RPC: Unable to send" },
        { RPC_CANTRECV,
                "RPC: Unable to receive" },
        { RPC_TIMEDOUT,
                "RPC: Timed out" },
        { RPC_VERSMISMATCH,
                "RPC: Incompatible versions of RPC" },
        { RPC_AUTHERROR,
                "RPC: Authentication error" },
        { RPC_PROGUNAVAIL,
                "RPC: Program unavailable" },
        { RPC_PROGVERSMISMATCH,
                "RPC: Program/version mismatch" },
        { RPC_PROCUNAVAIL,
                "RPC: Procedure unavailable" },
        { RPC_CANTDECODEARGS,
                "RPC: Server can't decode arguments" },
        { RPC_SYSTEMERROR,
                "RPC: Remote system error" },
        { RPC_UNKNOWNHOST,
                "RPC: Unknown host" },
        { RPC_UNKNOWNPROTO,
                "RPC: Unknown protocol" },
        { RPC_PMAPFAILURE,
                "RPC: Port mapper failure" },
        { RPC_PROGNOTREGISTERED,
                "RPC: Program not registered"},
        { RPC_FAILED,
                "RPC: Failed (unspecified error)"}
};


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

        for (i = 0; i < sizeof(rpc_errlist)/sizeof(struct rpc_errtab); i++) {
                if (rpc_errlist[i].status == stat) {
                        return (rpc_errlist[i].message);
                }
        }
        return ("RPC: (unknown error code)");
}

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


char *
clnt_spcreateerror(char *s)
{
        char *str = get_buf();
        char *strend;

        if (str == 0)
                return(0);
        strend = str+BUFSIZ;
        (void) snprintf(str, strend-str, "%s: ", s);
        str[BUFSIZ - 1] = '\0';
        (void) strncat(str, clnt_sperrno(rpc_createerr.cf_stat), BUFSIZ - 1);
        switch (rpc_createerr.cf_stat) {
        case RPC_PMAPFAILURE:
                (void) strncat(str, " - ", BUFSIZ - 1 - strlen(str));
                (void) strncat(str,
                    clnt_sperrno(rpc_createerr.cf_error.re_status),
                    BUFSIZ - 1 - strlen(str));
                break;

        case RPC_SYSTEMERROR:
                (void) strncat(str, " - ", BUFSIZ - 1 - strlen(str));
                {
                    const char *m = strerror(rpc_createerr.cf_error.re_errno);
                    if (m)
                        (void) strncat(str, m, BUFSIZ - 1 - strlen(str));
                    else
                        (void) snprintf(&str[strlen(str)], BUFSIZ - strlen(str),
                                        "Error %d",
                                        rpc_createerr.cf_error.re_errno);
                }
                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;
        }
        (void) strncat(str, "\n", BUFSIZ - 1 - strlen(str));
        return (str);
}

void
clnt_pcreateerror(char *s)
{
        (void) fprintf(stderr,"%s",clnt_spcreateerror(s));
}

struct auth_errtab {
        enum auth_stat status;
        char *message;
};

static struct auth_errtab auth_errlist[] = {
        { AUTH_OK,
                "Authentication OK" },
        { AUTH_BADCRED,
                "Invalid client credential" },
        { AUTH_REJECTEDCRED,
                "Server rejected credential" },
        { AUTH_BADVERF,
                "Invalid client verifier" },
        { AUTH_REJECTEDVERF,
                "Server rejected verifier" },
        { AUTH_TOOWEAK,
                "Client credential too weak" },
        { AUTH_INVALIDRESP,
                "Invalid server verifier" },
        { AUTH_FAILED,
                "Failed (unspecified error)" },
};

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

        for (i = 0; i < sizeof(auth_errlist)/sizeof(struct auth_errtab); i++) {
                if (auth_errlist[i].status == stat) {
                        return(auth_errlist[i].message);
                }
        }
        return(NULL);
}