晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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/*
* Portions Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*
* Portions Copyright (C) 2001 Nominum, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NOMINUM DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef ISCCC_CC_H
#define ISCCC_CC_H 1
/*! \file isccc/cc.h */
#include <inttypes.h>
#include <stdbool.h>
#include <isc/lang.h>
#include <isc/buffer.h>
#include <isccc/types.h>
ISC_LANG_BEGINDECLS
/*% from lib/dns/include/dst/dst.h */
#define ISCCC_ALG_UNKNOWN 0
#define ISCCC_ALG_HMACMD5 157
#define ISCCC_ALG_HMACSHA1 161
#define ISCCC_ALG_HMACSHA224 162
#define ISCCC_ALG_HMACSHA256 163
#define ISCCC_ALG_HMACSHA384 164
#define ISCCC_ALG_HMACSHA512 165
/*% Maximum Datagram Package */
#define ISCCC_CC_MAXDGRAMPACKET 4096
/*% Message Type String */
#define ISCCC_CCMSGTYPE_STRING 0x00
/*% Message Type Binary Data */
#define ISCCC_CCMSGTYPE_BINARYDATA 0x01
/*% Message Type Table */
#define ISCCC_CCMSGTYPE_TABLE 0x02
/*% Message Type List */
#define ISCCC_CCMSGTYPE_LIST 0x03
/*% Send to Wire */
isc_result_t
isccc_cc_towire(isccc_sexpr_t *alist, isc_buffer_t **buffer,
uint32_t algorithm, isccc_region_t *secret);
/*% Get From Wire */
isc_result_t
isccc_cc_fromwire(isccc_region_t *source, isccc_sexpr_t **alistp,
uint32_t algorithm, isccc_region_t *secret);
/*% Create Message */
isc_result_t
isccc_cc_createmessage(uint32_t version, const char *from, const char *to,
uint32_t serial, isccc_time_t now,
isccc_time_t expires, isccc_sexpr_t **alistp);
/*% Create Acknowledgment */
isc_result_t
isccc_cc_createack(isccc_sexpr_t *message, bool ok,
isccc_sexpr_t **ackp);
/*% Is Ack? */
bool
isccc_cc_isack(isccc_sexpr_t *message);
/*% Is Reply? */
bool
isccc_cc_isreply(isccc_sexpr_t *message);
/*% Create Response */
isc_result_t
isccc_cc_createresponse(isccc_sexpr_t *message, isccc_time_t now,
isccc_time_t expires, isccc_sexpr_t **alistp);
/*% Define String */
isccc_sexpr_t *
isccc_cc_definestring(isccc_sexpr_t *alist, const char *key, const char *str);
/*% Define uint 32 */
isccc_sexpr_t *
isccc_cc_defineuint32(isccc_sexpr_t *alist, const char *key, uint32_t i);
/*% Lookup String */
isc_result_t
isccc_cc_lookupstring(isccc_sexpr_t *alist, const char *key, char **strp);
/*% Lookup uint 32 */
isc_result_t
isccc_cc_lookupuint32(isccc_sexpr_t *alist, const char *key,
uint32_t *uintp);
/*% Create Symbol Table */
isc_result_t
isccc_cc_createsymtab(isccc_symtab_t **symtabp);
/*% Clean up Symbol Table */
void
isccc_cc_cleansymtab(isccc_symtab_t *symtab, isccc_time_t now);
/*% Check for Duplicates */
isc_result_t
isccc_cc_checkdup(isccc_symtab_t *symtab, isccc_sexpr_t *message,
isccc_time_t now);
ISC_LANG_ENDDECLS
#endif /* ISCCC_CC_H */