/*

 * Copyright 2018 Authors of Cilium

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#ifndef PROXYLIB_TYPES_H

#define PROXYLIB_TYPES_H

#include <stdint.h>

typedef enum {

  FILTEROP_MORE,   // Need more data

  FILTEROP_PASS,   // Pass N bytes

  FILTEROP_DROP,   // Drop N bytes

  FILTEROP_INJECT, // Inject N>0 bytes

  FILTEROP_ERROR,  // Protocol parsing error

} FilterOpType;

typedef enum {

  FILTEROP_ERROR_INVALID_OP_LENGTH = 1,   // Parser returned invalid operation length

  FILTEROP_ERROR_INVALID_FRAME_TYPE,

  FILTEROP_ERROR_INVALID_FRAME_LENGTH,

} FilterOpError;

typedef struct {

  uint64_t op;      // FilterOpType

  int64_t  n_bytes; // >0

} FilterOp;

typedef enum {

  FILTER_OK,                 // Operation was successful

  FILTER_POLICY_DROP,        // Connection needs to be dropped due to (L3/L4) policy

  FILTER_PARSER_ERROR,       // Connection needs to be dropped due to parser error

  FILTER_UNKNOWN_PARSER,     // Connection needs to be dropped due to unknown parser

  FILTER_UNKNOWN_CONNECTION, // Connection needs to be dropped due to it being unknown

  FILTER_INVALID_ADDRESS,    // Destination address in invalid format

  FILTER_INVALID_INSTANCE,   // Destination address in invalid format

  FILTER_UNKNOWN_ERROR,      // Error type could not be cast to an error code

} FilterResult;

#endif