1 // Copyright 2022 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 15 package dev.pigweed.pw_hdlc; 16 17 /** Constants shared between Encoder and Decoder */ 18 public final class Protocol { 19 static final byte UNNUMBERED_INFORMATION = 0x03; 20 static final byte FLAG = 0x7E; 21 static final byte ESCAPE = 0x7D; 22 static final byte[] ESCAPED_FLAG = {ESCAPE, 0x5E}; 23 static final byte[] ESCAPED_ESCAPE = {ESCAPE, 0x5D}; 24 static final byte ESCAPE_CONSTANT = 0x20; 25 Protocol()26 private Protocol() {} 27 }