SEG6_HMAC_FIELD_LEN
__u8 hmac[SEG6_HMAC_FIELD_LEN];
static_assert(SEG6_HMAC_FIELD_LEN > SHA1_DIGEST_SIZE);
SEG6_HMAC_FIELD_LEN - SHA1_DIGEST_SIZE);
static_assert(SEG6_HMAC_FIELD_LEN == SHA256_DIGEST_SIZE);
u8 hmac_output[SEG6_HMAC_FIELD_LEN];
if (crypto_memneq(hmac_output, tlv->hmac, SEG6_HMAC_FIELD_LEN))
memset(tlv->hmac, 0, SEG6_HMAC_FIELD_LEN);