/*
 * Copyright (c) 2009, Sun Microsystems, Inc.
 * Copyright (c) 2017 Red Hat, Inc. and/or its affiliates.
 * 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.
 */

/*
#include <sys/cdefs.h>
*/
/*
 * clnt_perror.c
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 *
 */
#include "config.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 "strl.h"

static char *auth_errmsg(enum auth_stat);

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

	if (e == NULL || s == NULL)
		return (0);

	str = (char *)mem_alloc(RPC_SPERROR_BUFLEN);
	len = RPC_SPERROR_BUFLEN;
	strstart = str;

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

	(void)strlcpy(str, clnt_sperrno(e->re_status), len);
	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_UNKNOWNHOST:
	case RPC_UNKNOWNPROTO:
	case RPC_PMAPFAILURE:
	case RPC_PROGNOTREGISTERED:
	case RPC_FAILED:
	case RPC_INTR:
	case RPC_UNKNOWNADDR:
	case RPC_TLIERROR:
	case RPC_NOBROADCAST:
	case RPC_N2AXLATEFAILURE:
	case RPC_UDERROR:
	case RPC_INPROGRESS:
	case RPC_STALERACHANDLE:
	case RPC_CANTCONNECT:
	case RPC_XPRTFAILED:
	case RPC_CANTCREATESTREAM:
		break;

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

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

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

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

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

void
rpc_perror(const struct rpc_err *e, const char *s)
{
	char *t;

	if (e == NULL || s == NULL)
		return;

	t = rpc_sperror(e, s);
	(void)fprintf(stderr, "%s\n", t);
	mem_free(t, RPC_SPERROR_BUFLEN);
}

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 */
	"RPC: Interrupted",	/* 18 - RPC_INTR */
	"RPC: Unknown remote address",	/* 19 - RPC_UNKNOWNADDR */
	"RPC_TLIERROR",	/* 20 - RPC_TLIERROR */
	"RPC: Broadcasting not supported",	/* 21 - RPC_NOBROADCAST */
	"RPC: Name to address translation failed",/* 22 - RPC_N2AXLATEFAILURE */
	"RPC_UDERROR",	/* 23 - RPC_UDERROR */
	"RPC_INPROGRESS",	/* 24 - RPC_INPROGRESS */
	"RPC_STALERACHANDLE",	/* 25 - RPC_STALERACHANDLE */
	"RPC_CANTCONNECT",	/* 26 - RPC_CANTCONNECT */
	"RPC_XPRTFAILED",	/* 27 - RPC_XPRTFAILED */
	"RPC_CANTCREATESTREAM",	/* 28 - RPC_CANTCREATESTREAM */
};

/*
 * 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));
}

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 */
};

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);
}