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115 lines
3.9 KiB
115 lines
3.9 KiB
/*
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* Copyright (C) 2019 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 <android-base/result.h>
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#include <errno.h>
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#include <linux/if_ether.h>
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#include <linux/if_link.h>
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#include <linux/rtnetlink.h>
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#include <string>
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#include "bpf/BpfUtils.h"
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#include "netdbpf/bpf_shared.h"
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namespace android {
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namespace net {
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// For better code clarity - do not change values - used for booleans like
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// with_ethernet_header or isEthernet.
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constexpr bool RAWIP = false;
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constexpr bool ETHER = true;
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// For better code clarity when used for 'bool ingress' parameter.
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constexpr bool EGRESS = false;
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constexpr bool INGRESS = true;
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// this returns an ARPHRD_* constant or a -errno
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int hardwareAddressType(const std::string& interface);
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// return MTU or -errno
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int deviceMTU(const std::string& interface);
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base::Result<bool> isEthernet(const std::string& interface);
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inline int getClatEgress4MapFd(void) {
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const int fd = bpf::mapRetrieveRW(CLAT_EGRESS4_MAP_PATH);
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return (fd == -1) ? -errno : fd;
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}
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inline int getClatEgress4ProgFd(bool with_ethernet_header) {
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const int fd = bpf::retrieveProgram(with_ethernet_header ? CLAT_EGRESS4_PROG_ETHER_PATH
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: CLAT_EGRESS4_PROG_RAWIP_PATH);
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return (fd == -1) ? -errno : fd;
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}
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inline int getClatIngress6MapFd(void) {
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const int fd = bpf::mapRetrieveRW(CLAT_INGRESS6_MAP_PATH);
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return (fd == -1) ? -errno : fd;
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}
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inline int getClatIngress6ProgFd(bool with_ethernet_header) {
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const int fd = bpf::retrieveProgram(with_ethernet_header ? CLAT_INGRESS6_PROG_ETHER_PATH
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: CLAT_INGRESS6_PROG_RAWIP_PATH);
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return (fd == -1) ? -errno : fd;
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}
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int doTcQdiscClsact(int ifIndex, uint16_t nlMsgType, uint16_t nlMsgFlags);
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inline int tcQdiscAddDevClsact(int ifIndex) {
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return doTcQdiscClsact(ifIndex, RTM_NEWQDISC, NLM_F_EXCL | NLM_F_CREATE);
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}
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inline int tcQdiscReplaceDevClsact(int ifIndex) {
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return doTcQdiscClsact(ifIndex, RTM_NEWQDISC, NLM_F_CREATE | NLM_F_REPLACE);
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}
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inline int tcQdiscDelDevClsact(int ifIndex) {
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return doTcQdiscClsact(ifIndex, RTM_DELQDISC, 0);
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}
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// tc filter add dev .. in/egress prio 4 protocol ipv6/ip bpf object-pinned /sys/fs/bpf/...
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// direct-action
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int tcFilterAddDevBpf(int ifIndex, bool ingress, uint16_t proto, int bpfFd, bool ethernet);
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// tc filter add dev .. ingress prio 4 protocol ipv6 bpf object-pinned /sys/fs/bpf/... direct-action
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inline int tcFilterAddDevIngressClatIpv6(int ifIndex, int bpfFd, bool ethernet) {
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return tcFilterAddDevBpf(ifIndex, INGRESS, ETH_P_IPV6, bpfFd, ethernet);
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}
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// tc filter add dev .. egress prio 4 protocol ip bpf object-pinned /sys/fs/bpf/... direct-action
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inline int tcFilterAddDevEgressClatIpv4(int ifIndex, int bpfFd, bool ethernet) {
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return tcFilterAddDevBpf(ifIndex, EGRESS, ETH_P_IP, bpfFd, ethernet);
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}
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// tc filter del dev .. in/egress prio .. protocol ..
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int tcFilterDelDev(int ifIndex, bool ingress, uint16_t proto);
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// tc filter del dev .. ingress prio 4 protocol ipv6
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inline int tcFilterDelDevIngressClatIpv6(int ifIndex) {
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return tcFilterDelDev(ifIndex, INGRESS, ETH_P_IPV6);
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}
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// tc filter del dev .. egress prio 4 protocol ip
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inline int tcFilterDelDevEgressClatIpv4(int ifIndex) {
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return tcFilterDelDev(ifIndex, EGRESS, ETH_P_IP);
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}
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} // namespace net
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} // namespace android
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