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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Current File : //usr/include/linux/mrp_bridge.h
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */

#ifndef _LINUX_MRP_BRIDGE_H_
#define _LINUX_MRP_BRIDGE_H_

#include <linux/types.h>
#include <linux/if_ether.h>

#define MRP_MAX_FRAME_LENGTH		200
#define MRP_DEFAULT_PRIO		0x8000
#define MRP_DOMAIN_UUID_LENGTH		16
#define MRP_VERSION			1
#define MRP_FRAME_PRIO			7
#define MRP_OUI_LENGTH			3
#define MRP_MANUFACTURE_DATA_LENGTH	2

enum br_mrp_ring_role_type {
	BR_MRP_RING_ROLE_DISABLED,
	BR_MRP_RING_ROLE_MRC,
	BR_MRP_RING_ROLE_MRM,
	BR_MRP_RING_ROLE_MRA,
};

enum br_mrp_in_role_type {
	BR_MRP_IN_ROLE_DISABLED,
	BR_MRP_IN_ROLE_MIC,
	BR_MRP_IN_ROLE_MIM,
};

enum br_mrp_ring_state_type {
	BR_MRP_RING_STATE_OPEN,
	BR_MRP_RING_STATE_CLOSED,
};

enum br_mrp_in_state_type {
	BR_MRP_IN_STATE_OPEN,
	BR_MRP_IN_STATE_CLOSED,
};

enum br_mrp_port_state_type {
	BR_MRP_PORT_STATE_DISABLED,
	BR_MRP_PORT_STATE_BLOCKED,
	BR_MRP_PORT_STATE_FORWARDING,
	BR_MRP_PORT_STATE_NOT_CONNECTED,
};

enum br_mrp_port_role_type {
	BR_MRP_PORT_ROLE_PRIMARY,
	BR_MRP_PORT_ROLE_SECONDARY,
	BR_MRP_PORT_ROLE_INTER,
};

enum br_mrp_tlv_header_type {
	BR_MRP_TLV_HEADER_END = 0x0,
	BR_MRP_TLV_HEADER_COMMON = 0x1,
	BR_MRP_TLV_HEADER_RING_TEST = 0x2,
	BR_MRP_TLV_HEADER_RING_TOPO = 0x3,
	BR_MRP_TLV_HEADER_RING_LINK_DOWN = 0x4,
	BR_MRP_TLV_HEADER_RING_LINK_UP = 0x5,
	BR_MRP_TLV_HEADER_IN_TEST = 0x6,
	BR_MRP_TLV_HEADER_IN_TOPO = 0x7,
	BR_MRP_TLV_HEADER_IN_LINK_DOWN = 0x8,
	BR_MRP_TLV_HEADER_IN_LINK_UP = 0x9,
	BR_MRP_TLV_HEADER_IN_LINK_STATUS = 0xa,
	BR_MRP_TLV_HEADER_OPTION = 0x7f,
};

enum br_mrp_sub_tlv_header_type {
	BR_MRP_SUB_TLV_HEADER_TEST_MGR_NACK = 0x1,
	BR_MRP_SUB_TLV_HEADER_TEST_PROPAGATE = 0x2,
	BR_MRP_SUB_TLV_HEADER_TEST_AUTO_MGR = 0x3,
};

#endif

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