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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Current File : //proc/self/root/proc/self/root/usr/include/linux/netfilter/nfnetlink_hook.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _NFNL_HOOK_H_
#define _NFNL_HOOK_H_

enum nfnl_hook_msg_types {
	NFNL_MSG_HOOK_GET,
	NFNL_MSG_HOOK_MAX,
};

/**
 * enum nfnl_hook_attributes - netfilter hook netlink attributes
 *
 * @NFNLA_HOOK_HOOKNUM: netfilter hook number (NLA_U32)
 * @NFNLA_HOOK_PRIORITY: netfilter hook priority (NLA_U32)
 * @NFNLA_HOOK_DEV: netdevice name (NLA_STRING)
 * @NFNLA_HOOK_FUNCTION_NAME: hook function name (NLA_STRING)
 * @NFNLA_HOOK_MODULE_NAME: kernel module that registered this hook (NLA_STRING)
 * @NFNLA_HOOK_CHAIN_INFO: basechain hook metadata (NLA_NESTED)
 */
enum nfnl_hook_attributes {
	NFNLA_HOOK_UNSPEC,
	NFNLA_HOOK_HOOKNUM,
	NFNLA_HOOK_PRIORITY,
	NFNLA_HOOK_DEV,
	NFNLA_HOOK_FUNCTION_NAME,
	NFNLA_HOOK_MODULE_NAME,
	NFNLA_HOOK_CHAIN_INFO,
	__NFNLA_HOOK_MAX
};
#define NFNLA_HOOK_MAX		(__NFNLA_HOOK_MAX - 1)

/**
 * enum nfnl_hook_chain_info_attributes - chain description
 *
 * NFNLA_HOOK_INFO_DESC: nft chain and table name (enum nft_table_attributes) (NLA_NESTED)
 * NFNLA_HOOK_INFO_TYPE: chain type (enum nfnl_hook_chaintype) (NLA_U32)
 */
enum nfnl_hook_chain_info_attributes {
	NFNLA_HOOK_INFO_UNSPEC,
	NFNLA_HOOK_INFO_DESC,
	NFNLA_HOOK_INFO_TYPE,
	__NFNLA_HOOK_INFO_MAX,
};
#define NFNLA_HOOK_INFO_MAX (__NFNLA_HOOK_INFO_MAX - 1)

enum nfnl_hook_chain_desc_attributes {
	NFNLA_CHAIN_UNSPEC,
	NFNLA_CHAIN_TABLE,
	NFNLA_CHAIN_FAMILY,
	NFNLA_CHAIN_NAME,
	__NFNLA_CHAIN_MAX,
};
#define NFNLA_CHAIN_MAX (__NFNLA_CHAIN_MAX - 1)

/**
 * enum nfnl_hook_chaintype - chain type
 *
 * @NFNL_HOOK_TYPE_NFTABLES nf_tables base chain
 */
enum nfnl_hook_chaintype {
	NFNL_HOOK_TYPE_NFTABLES = 0x1,
};

#endif /* _NFNL_HOOK_H */