15a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline/* 25a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * Copyright (C) 2017 The Android Open Source Project 35a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * 45a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * Licensed under the Apache License, Version 2.0 (the "License"); 55a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * you may not use this file except in compliance with the License. 65a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * You may obtain a copy of the License at 75a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * 85a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * http://www.apache.org/licenses/LICENSE-2.0 95a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * 105a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * Unless required by applicable law or agreed to in writing, software 115a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * distributed under the License is distributed on an "AS IS" BASIS, 125a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 135a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * See the License for the specific language governing permissions and 145a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * limitations under the License. 155a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline */ 165a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 175a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#include <errno.h> 185a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#include <error.h> 195a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#include <hidl/HidlSupport.h> 205a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#include <jni.h> 212279b2534272282a5b5152723235da397e49195cSteven Moreland#include <nativehelper/JNIHelp.h> 225a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#include <linux/netfilter/nfnetlink.h> 235a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#include <linux/netlink.h> 245a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#include <sys/socket.h> 255a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#include <android-base/unique_fd.h> 265a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#include <android/hardware/tetheroffload/config/1.0/IOffloadConfig.h> 275a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 285a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#define LOG_TAG "OffloadHardwareInterface" 295a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline#include <utils/Log.h> 305a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 315a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Klinenamespace android { 325a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 335a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Klineusing hardware::hidl_handle; 345a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Klineusing hardware::hidl_string; 355a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Klineusing hardware::tetheroffload::config::V1_0::IOffloadConfig; 365a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 375a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Klinenamespace { 385a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 395a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Klineinline const sockaddr * asSockaddr(const sockaddr_nl *nladdr) { 405a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline return reinterpret_cast<const sockaddr *>(nladdr); 415a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline} 425a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 435a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Klineint conntrackSocket(unsigned groups) { 445a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline base::unique_fd s(socket(AF_NETLINK, SOCK_DGRAM, NETLINK_NETFILTER)); 455a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline if (s.get() < 0) return -errno; 465a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 475a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline const struct sockaddr_nl bind_addr = { 485a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline .nl_family = AF_NETLINK, 495a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline .nl_pad = 0, 505a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline .nl_pid = 0, 515a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline .nl_groups = groups, 525a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline }; 535a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline if (bind(s.get(), asSockaddr(&bind_addr), sizeof(bind_addr)) != 0) { 545a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline return -errno; 555a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline } 565a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 575a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline const struct sockaddr_nl kernel_addr = { 585a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline .nl_family = AF_NETLINK, 595a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline .nl_pad = 0, 605a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline .nl_pid = 0, 615a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline .nl_groups = groups, 625a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline }; 635a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline if (connect(s.get(), asSockaddr(&kernel_addr), sizeof(kernel_addr)) != 0) { 645a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline return -errno; 655a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline } 665a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 675a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline return s.release(); 685a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline} 695a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 705a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline// Return a hidl_handle that owns the file descriptor owned by fd, and will 715a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline// auto-close it (otherwise there would be double-close problems). 725a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline// 735a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline// Rely upon the compiler to eliminate the constexprs used for clarity. 74664d208a23be1bc6a0b1d6efdf62b711885394bcErik Klinehidl_handle handleFromFileDescriptor(base::unique_fd fd) { 755a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline hidl_handle h; 765a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 775a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline static constexpr int kNumFds = 1; 785a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline static constexpr int kNumInts = 0; 79f57aeea077ffc8be92ff4d82aaaf1d706b0b5fbdErik Kline native_handle_t *nh = native_handle_create(kNumFds, kNumInts); 805a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline nh->data[0] = fd.release(); 815a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 825a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline static constexpr bool kTakeOwnership = true; 835a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline h.setTo(nh, kTakeOwnership); 845a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 85664d208a23be1bc6a0b1d6efdf62b711885394bcErik Kline return h; 865a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline} 875a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 885a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline} // namespace 895a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 905a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Klinestatic jboolean android_server_connectivity_tethering_OffloadHardwareInterface_configOffload( 915a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline JNIEnv* /* env */) { 925a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline sp<IOffloadConfig> configInterface = IOffloadConfig::getService(); 935a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline if (configInterface.get() == nullptr) { 945a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline ALOGD("Could not find IOffloadConfig service."); 955a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline return false; 965a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline } 975a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 985a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline // Per the IConfigOffload definition: 995a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline // 1005a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline // fd1 A file descriptor bound to the following netlink groups 1015a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline // (NF_NETLINK_CONNTRACK_NEW | NF_NETLINK_CONNTRACK_DESTROY). 1025a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline // 1035a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline // fd2 A file descriptor bound to the following netlink groups 1045a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline // (NF_NETLINK_CONNTRACK_UPDATE | NF_NETLINK_CONNTRACK_DESTROY). 1055a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline base::unique_fd 106f10282b830af4c7ea56b2c64e73a7ffd3c006007Niranjan Pendharkar fd1(conntrackSocket(NF_NETLINK_CONNTRACK_NEW | NF_NETLINK_CONNTRACK_DESTROY)), 107f10282b830af4c7ea56b2c64e73a7ffd3c006007Niranjan Pendharkar fd2(conntrackSocket(NF_NETLINK_CONNTRACK_UPDATE | NF_NETLINK_CONNTRACK_DESTROY)); 1085a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline if (fd1.get() < 0 || fd2.get() < 0) { 1095a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline ALOGE("Unable to create conntrack handles: %d/%s", errno, strerror(errno)); 1105a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline return false; 1115a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline } 1125a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 1135a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline hidl_handle h1(handleFromFileDescriptor(std::move(fd1))), 1145a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline h2(handleFromFileDescriptor(std::move(fd2))); 1155a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 116300f9d0bf281ebe36f172d3f9cdd89ef2a89a46eErik Kline bool rval(false); 1175a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline hidl_string msg; 118664d208a23be1bc6a0b1d6efdf62b711885394bcErik Kline const auto status = configInterface->setHandles(h1, h2, 1195a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline [&rval, &msg](bool success, const hidl_string& errMsg) { 1205a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline rval = success; 1215a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline msg = errMsg; 1225a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline }); 123664d208a23be1bc6a0b1d6efdf62b711885394bcErik Kline if (!status.isOk() || !rval) { 124664d208a23be1bc6a0b1d6efdf62b711885394bcErik Kline ALOGE("IOffloadConfig::setHandles() error: '%s' / '%s'", 125664d208a23be1bc6a0b1d6efdf62b711885394bcErik Kline status.description().c_str(), msg.c_str()); 126300f9d0bf281ebe36f172d3f9cdd89ef2a89a46eErik Kline // If status is somehow not ok, make sure rval captures this too. 127300f9d0bf281ebe36f172d3f9cdd89ef2a89a46eErik Kline rval = false; 1285a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline } 1295a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 1305a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline return rval; 1315a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline} 1325a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 1335a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline/* 1345a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline * JNI registration. 1355a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline */ 1365a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Klinestatic const JNINativeMethod gMethods[] = { 1375a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline /* name, signature, funcPtr */ 1385a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline { "configOffload", "()Z", 1395a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline (void*) android_server_connectivity_tethering_OffloadHardwareInterface_configOffload }, 1405a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline}; 1415a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 1425a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Klineint register_android_server_connectivity_tethering_OffloadHardwareInterface(JNIEnv* env) { 1435a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline return jniRegisterNativeMethods(env, 1445a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline "com/android/server/connectivity/tethering/OffloadHardwareInterface", 1455a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline gMethods, NELEM(gMethods)); 1465a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline} 1475a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline 1485a7c8a0b24adc0f5d5ce3b98e995ef78096abf5bErik Kline}; // namespace android 149