| /* |
| * Copyright 2015, The Android Open Source Project |
| * |
| * 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 APF_INTERPRETER_H_ |
| #define APF_INTERPRETER_H_ |
| |
| #include <stdint.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * Version of APF instruction set processed by accept_packet(). |
| * Should be returned by wifi_get_packet_filter_info. |
| */ |
| #define APF_VERSION 4 |
| |
| /** |
| * Runs a packet filtering program over a packet. |
| * |
| * The text section containing the program instructions starts at address |
| * program and stops at + program_len - 1, and the writable data section |
| * begins at program + program_len and ends at program + ram_len - 1, |
| * as described in the following diagram: |
| * |
| * program program + program_len program + ram_len |
| * | text section | data section | |
| * +--------------------+------------------------+ |
| * |
| * @param program the program bytecode, followed by the writable data region. |
| * @param program_len the length in bytes of the read-only portion of the APF |
| * buffer pointed to by {@code program}. |
| * @param ram_len total length of the APF buffer pointed to by {@code program}, |
| * including the read-only bytecode portion and the read-write |
| * data portion. |
| * @param packet the packet bytes, starting from the 802.3 header and not |
| * including any CRC bytes at the end. |
| * @param packet_len the length of {@code packet} in bytes. |
| * @param filter_age the number of seconds since the filter was programmed. |
| * |
| * @return non-zero if packet should be passed to AP, zero if |
| * packet should be dropped. |
| */ |
| int accept_packet(uint8_t* program, uint32_t program_len, uint32_t ram_len, |
| const uint8_t* packet, uint32_t packet_len, |
| uint32_t filter_age); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif // APF_INTERPRETER_H_ |