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       1  /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
       2  #ifndef _LINUX_SEG6_HMAC_H
       3  #define _LINUX_SEG6_HMAC_H
       4  
       5  #include <linux/types.h>
       6  #include <linux/seg6.h>
       7  
       8  #define SEG6_HMAC_SECRET_LEN	64
       9  #define SEG6_HMAC_FIELD_LEN	32
      10  
      11  struct sr6_tlv_hmac {
      12  	struct sr6_tlv tlvhdr;
      13  	__u16 reserved;
      14  	__be32 hmackeyid;
      15  	__u8 hmac[SEG6_HMAC_FIELD_LEN];
      16  };
      17  
      18  enum {
      19  	SEG6_HMAC_ALGO_SHA1 = 1,
      20  	SEG6_HMAC_ALGO_SHA256 = 2,
      21  };
      22  
      23  #endif