Critics have remarked that those four worthies were truly peerless throughout the ages; yet the present falls short of the pastβthe ancients favored unadorned simplicity, whereas the moderns prefer refined elegance. Styles of substance and ornament rise and fall in succession, shifting with the changing mores of the times; such evolution is simply the natural order of things. The ideal lies in honoring antiquity without clashing with the present, and embracing modernity without succumbing to its flawsβembodying that perfect balance of substance and refinement that defines the true gentleman. There is surely no need to abandon a carved palace in favor of a cave dwelling, or to trade a jade carriage for a primitive cart with solid wooden wheels.
Current path: usr/include/linux/
β Cloned to:
β¬οΈ Go up: /usr/include
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
#ifndef _LINUX_CFM_BRIDGE_H_
#define _LINUX_CFM_BRIDGE_H_
#include <linux/types.h>
#include <linux/if_ether.h>
#define ETHER_HEADER_LENGTH (6+6+4+2)
#define CFM_MAID_LENGTH 48
#define CFM_CCM_PDU_LENGTH 75
#define CFM_PORT_STATUS_TLV_LENGTH 4
#define CFM_IF_STATUS_TLV_LENGTH 4
#define CFM_IF_STATUS_TLV_TYPE 4
#define CFM_PORT_STATUS_TLV_TYPE 2
#define CFM_ENDE_TLV_TYPE 0
#define CFM_CCM_MAX_FRAME_LENGTH (ETHER_HEADER_LENGTH+\
CFM_CCM_PDU_LENGTH+\
CFM_PORT_STATUS_TLV_LENGTH+\
CFM_IF_STATUS_TLV_LENGTH)
#define CFM_FRAME_PRIO 7
#define CFM_CCM_TLV_OFFSET 70
#define CFM_CCM_PDU_MAID_OFFSET 10
#define CFM_CCM_PDU_MEPID_OFFSET 8
#define CFM_CCM_PDU_SEQNR_OFFSET 4
#define CFM_CCM_PDU_TLV_OFFSET 74
#define CFM_CCM_ITU_RESERVED_SIZE 16
struct br_cfm_common_hdr {
__u8 mdlevel_version;
__u8 opcode;
__u8 flags;
__u8 tlv_offset;
};
enum br_cfm_opcodes {
BR_CFM_OPCODE_CCM = 0x1,
};
/* MEP domain */
enum br_cfm_domain {
BR_CFM_PORT,
BR_CFM_VLAN,
};
/* MEP direction */
enum br_cfm_mep_direction {
BR_CFM_MEP_DIRECTION_DOWN,
BR_CFM_MEP_DIRECTION_UP,
};
/* CCM interval supported. */
enum br_cfm_ccm_interval {
BR_CFM_CCM_INTERVAL_NONE,
BR_CFM_CCM_INTERVAL_3_3_MS,
BR_CFM_CCM_INTERVAL_10_MS,
BR_CFM_CCM_INTERVAL_100_MS,
BR_CFM_CCM_INTERVAL_1_SEC,
BR_CFM_CCM_INTERVAL_10_SEC,
BR_CFM_CCM_INTERVAL_1_MIN,
BR_CFM_CCM_INTERVAL_10_MIN,
};
#endif