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。 sh-3ll

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# -*- mode: perl -*-
# ============================================================================

package Net::SNMP::Transport::IPv6::TCP;

# $Id: TCP.pm,v 3.0 2009/09/09 15:05:33 dtown Rel $

# Object that handles the TCP/IPv6 Transport Domain for the SNMP Engine.

# Copyright (c) 2004-2009 David M. Town <dtown@cpan.org>
# All rights reserved.

# This program is free software; you may redistribute it and/or modify it
# under the same terms as the Perl 5 programming language system itself.

# ============================================================================

use strict;

use Net::SNMP::Transport::IPv4::TCP qw( DOMAIN_TCPIPV6 DOMAIN_TCPIPV6Z );

## Version of the Net::SNMP::Transport::IPv6::TCP module

our $VERSION = v3.0.0;

## Handle importing/exporting of symbols

use base qw( Net::SNMP::Transport::IPv6 Net::SNMP::Transport::IPv4::TCP );

## RFC 3411 - snmpEngineMaxMessageSize::=INTEGER (484..2147483647)

sub MSG_SIZE_DEFAULT_TCP6  { 1440 }  # Ethernet(1500) - IPv6(40) - TCP(20)

# [public methods] -----------------------------------------------------------

sub domain
{
   return DOMAIN_TCPIPV6; # transportDomainTcpIpv6
}

sub type
{
   return 'TCP/IPv6'; # tcpIpv6(6)
}

# [private methods] ----------------------------------------------------------

sub _msg_size_default
{
   return MSG_SIZE_DEFAULT_TCP6;
}

sub _tdomain
{
   return $_[0]->_scope_id($_[1]) ? DOMAIN_TCPIPV6Z : DOMAIN_TCPIPV6;
}

# ============================================================================
1; # [end Net::SNMP::Transport::TCP6]