130 lines
4.3 KiB
C++
130 lines
4.3 KiB
C++
/*
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* Copyright (C) 2018 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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#include <string>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <linux/inet_diag.h>
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#include <linux/sock_diag.h>
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#include <net/if.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <gtest/gtest.h>
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#include <cutils/qtaguid.h>
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#include <processgroup/processgroup.h>
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#include <android-base/stringprintf.h>
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#include <android-base/strings.h>
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#include "bpf/BpfMap.h"
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#include "bpf/BpfUtils.h"
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#include "bpf_shared.h"
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using android::base::Result;
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namespace android {
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namespace bpf {
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// Use the upper limit of uid to avoid conflict with real app uids. We can't use UID_MAX because
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// it's -1, which is INVALID_UID.
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constexpr uid_t TEST_UID = UID_MAX - 1;
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constexpr uint32_t TEST_TAG = 42;
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class BpfBasicTest : public testing::Test {
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protected:
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BpfBasicTest() {}
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};
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TEST_F(BpfBasicTest, TestCgroupMounted) {
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std::string cg2_path;
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ASSERT_EQ(true, CgroupGetControllerPath(CGROUPV2_CONTROLLER_NAME, &cg2_path));
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ASSERT_EQ(0, access(cg2_path.c_str(), R_OK));
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ASSERT_EQ(0, access((cg2_path + "/cgroup.controllers").c_str(), R_OK));
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}
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TEST_F(BpfBasicTest, TestTrafficControllerSetUp) {
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ASSERT_EQ(0, access(BPF_EGRESS_PROG_PATH, R_OK));
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ASSERT_EQ(0, access(BPF_INGRESS_PROG_PATH, R_OK));
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ASSERT_EQ(0, access(XT_BPF_INGRESS_PROG_PATH, R_OK));
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ASSERT_EQ(0, access(XT_BPF_EGRESS_PROG_PATH, R_OK));
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ASSERT_EQ(0, access(COOKIE_TAG_MAP_PATH, R_OK));
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ASSERT_EQ(0, access(UID_COUNTERSET_MAP_PATH, R_OK));
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ASSERT_EQ(0, access(STATS_MAP_A_PATH, R_OK));
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ASSERT_EQ(0, access(STATS_MAP_B_PATH, R_OK));
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ASSERT_EQ(0, access(IFACE_INDEX_NAME_MAP_PATH, R_OK));
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ASSERT_EQ(0, access(IFACE_STATS_MAP_PATH, R_OK));
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ASSERT_EQ(0, access(CONFIGURATION_MAP_PATH, R_OK));
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ASSERT_EQ(0, access(UID_OWNER_MAP_PATH, R_OK));
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}
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TEST_F(BpfBasicTest, TestSocketFilterSetUp) {
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SKIP_IF_EXTENDED_BPF_NOT_SUPPORTED;
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ASSERT_EQ(0, access(CGROUP_SOCKET_PROG_PATH, R_OK));
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ASSERT_EQ(0, access(UID_PERMISSION_MAP_PATH, R_OK));
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}
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TEST_F(BpfBasicTest, TestTagSocket) {
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BpfMap<uint64_t, UidTagValue> cookieTagMap(COOKIE_TAG_MAP_PATH);
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ASSERT_LE(0, cookieTagMap.getMap());
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int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0);
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ASSERT_LE(0, sock);
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uint64_t cookie = getSocketCookie(sock);
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ASSERT_NE(NONEXISTENT_COOKIE, cookie);
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ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID));
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Result<UidTagValue> tagResult = cookieTagMap.readValue(cookie);
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ASSERT_RESULT_OK(tagResult);
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ASSERT_EQ(TEST_UID, tagResult.value().uid);
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ASSERT_EQ(TEST_TAG, tagResult.value().tag);
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ASSERT_EQ(0, qtaguid_untagSocket(sock));
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tagResult = cookieTagMap.readValue(cookie);
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ASSERT_FALSE(tagResult.ok());
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ASSERT_EQ(ENOENT, tagResult.error().code());
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}
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TEST_F(BpfBasicTest, TestCloseSocketWithoutUntag) {
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BpfMap<uint64_t, UidTagValue> cookieTagMap(COOKIE_TAG_MAP_PATH);
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ASSERT_LE(0, cookieTagMap.getMap());
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int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0);
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ASSERT_LE(0, sock);
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uint64_t cookie = getSocketCookie(sock);
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ASSERT_NE(NONEXISTENT_COOKIE, cookie);
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ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID));
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Result<UidTagValue> tagResult = cookieTagMap.readValue(cookie);
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ASSERT_RESULT_OK(tagResult);
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ASSERT_EQ(TEST_UID, tagResult.value().uid);
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ASSERT_EQ(TEST_TAG, tagResult.value().tag);
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ASSERT_EQ(0, close(sock));
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// Check map periodically until sk destroy handler have done its job.
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for (int i = 0; i < 10; i++) {
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usleep(5000); // 5ms
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tagResult = cookieTagMap.readValue(cookie);
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if (!tagResult.ok()) {
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ASSERT_EQ(ENOENT, tagResult.error().code());
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return;
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}
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}
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FAIL() << "socket tag still exist after 50ms";
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}
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}
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}
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