61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <stdbool.h>
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#include <stdint.h>
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// This header file is shared by eBPF kernel programs (C) and netd (C++) and
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// some of the maps are also accessed directly from Java mainline module code.
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//
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// Hence: explicitly pad all relevant structures and assert that their size
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// is the sum of the sizes of their fields.
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#define STRUCT_SIZE(name, size) _Static_assert(sizeof(name) == (size), "Incorrect struct size.")
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typedef struct {
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uint32_t iif; // The input interface index
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struct in6_addr pfx96; // The source /96 nat64 prefix, bottom 32 bits must be 0
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struct in6_addr local6; // The full 128-bits of the destination IPv6 address
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} ClatIngress6Key;
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STRUCT_SIZE(ClatIngress6Key, 4 + 2 * 16); // 36
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typedef struct {
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uint32_t oif; // The output interface to redirect to (0 means don't redirect)
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struct in_addr local4; // The destination IPv4 address
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} ClatIngress6Value;
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STRUCT_SIZE(ClatIngress6Value, 4 + 4); // 8
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typedef struct {
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uint32_t iif; // The input interface index
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struct in_addr local4; // The source IPv4 address
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} ClatEgress4Key;
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STRUCT_SIZE(ClatEgress4Key, 4 + 4); // 8
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typedef struct {
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uint32_t oif; // The output interface to redirect to
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struct in6_addr local6; // The full 128-bits of the source IPv6 address
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struct in6_addr pfx96; // The destination /96 nat64 prefix, bottom 32 bits must be 0
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bool oifIsEthernet; // Whether the output interface requires ethernet header
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uint8_t pad[3];
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} ClatEgress4Value;
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STRUCT_SIZE(ClatEgress4Value, 4 + 2 * 16 + 1 + 3); // 40
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#undef STRUCT_SIZE
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