/*
|
* Copyright (C) 2018 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.
|
*/
|
|
#include <string>
|
|
#include <fcntl.h>
|
#include <inttypes.h>
|
#include <limits.h>
|
#include <linux/inet_diag.h>
|
#include <linux/sock_diag.h>
|
#include <net/if.h>
|
#include <sys/socket.h>
|
#include <sys/types.h>
|
#include <unistd.h>
|
|
#include <gtest/gtest.h>
|
|
#include <cutils/qtaguid.h>
|
#include <processgroup/processgroup.h>
|
|
#include <android-base/stringprintf.h>
|
#include <android-base/strings.h>
|
|
#include "bpf/BpfMap.h"
|
#include "bpf/BpfUtils.h"
|
#include "netdbpf/bpf_shared.h"
|
|
using android::netdutils::StatusOr;
|
|
namespace android {
|
namespace bpf {
|
|
// Use the upper limit of uid to avoid conflict with real app uids. We can't use UID_MAX because
|
// it's -1, which is INVALID_UID.
|
constexpr uid_t TEST_UID = UID_MAX - 1;
|
constexpr uint32_t TEST_TAG = 42;
|
constexpr int TEST_COUNTERSET = 1;
|
constexpr int DEFAULT_COUNTERSET = 0;
|
|
#define SKIP_IF_EXTENDED_BPF_NOT_SUPPORTED \
|
do { \
|
if (android::bpf::getBpfSupportLevel() != android::bpf::BpfLevel::EXTENDED) { \
|
GTEST_LOG_(INFO) << "This test is skipped since extended bpf feature" \
|
<< "not supported\n"; \
|
return; \
|
} \
|
} while (0)
|
|
class BpfBasicTest : public testing::Test {
|
protected:
|
BpfBasicTest() {}
|
};
|
|
TEST_F(BpfBasicTest, TestCgroupMounted) {
|
SKIP_IF_BPF_NOT_SUPPORTED;
|
|
std::string cg2_path;
|
ASSERT_EQ(true, CgroupGetControllerPath(CGROUPV2_CONTROLLER_NAME, &cg2_path));
|
ASSERT_EQ(0, access(cg2_path.c_str(), R_OK));
|
ASSERT_EQ(0, access((cg2_path + "/cgroup.controllers").c_str(), R_OK));
|
}
|
|
TEST_F(BpfBasicTest, TestTrafficControllerSetUp) {
|
SKIP_IF_BPF_NOT_SUPPORTED;
|
|
ASSERT_EQ(0, access(BPF_EGRESS_PROG_PATH, R_OK));
|
ASSERT_EQ(0, access(BPF_INGRESS_PROG_PATH, R_OK));
|
ASSERT_EQ(0, access(XT_BPF_INGRESS_PROG_PATH, R_OK));
|
ASSERT_EQ(0, access(XT_BPF_EGRESS_PROG_PATH, R_OK));
|
ASSERT_EQ(0, access(COOKIE_TAG_MAP_PATH, R_OK));
|
ASSERT_EQ(0, access(UID_COUNTERSET_MAP_PATH, R_OK));
|
ASSERT_EQ(0, access(STATS_MAP_A_PATH, R_OK));
|
ASSERT_EQ(0, access(STATS_MAP_B_PATH, R_OK));
|
ASSERT_EQ(0, access(IFACE_INDEX_NAME_MAP_PATH, R_OK));
|
ASSERT_EQ(0, access(IFACE_STATS_MAP_PATH, R_OK));
|
ASSERT_EQ(0, access(CONFIGURATION_MAP_PATH, R_OK));
|
ASSERT_EQ(0, access(UID_OWNER_MAP_PATH, R_OK));
|
}
|
|
TEST_F(BpfBasicTest, TestSocketFilterSetUp) {
|
SKIP_IF_EXTENDED_BPF_NOT_SUPPORTED;
|
|
ASSERT_EQ(0, access(CGROUP_SOCKET_PROG_PATH, R_OK));
|
ASSERT_EQ(0, access(UID_PERMISSION_MAP_PATH, R_OK));
|
}
|
|
TEST_F(BpfBasicTest, TestTagSocket) {
|
SKIP_IF_BPF_NOT_SUPPORTED;
|
|
BpfMap<uint64_t, UidTag> cookieTagMap(mapRetrieve(COOKIE_TAG_MAP_PATH, 0));
|
ASSERT_LE(0, cookieTagMap.getMap());
|
int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0);
|
ASSERT_LE(0, sock);
|
uint64_t cookie = getSocketCookie(sock);
|
ASSERT_NE(NONEXISTENT_COOKIE, cookie);
|
ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID));
|
StatusOr<UidTag> tagResult = cookieTagMap.readValue(cookie);
|
ASSERT_TRUE(isOk(tagResult));
|
ASSERT_EQ(TEST_UID, tagResult.value().uid);
|
ASSERT_EQ(TEST_TAG, tagResult.value().tag);
|
ASSERT_EQ(0, qtaguid_untagSocket(sock));
|
tagResult = cookieTagMap.readValue(cookie);
|
ASSERT_FALSE(isOk(tagResult));
|
ASSERT_EQ(ENOENT, tagResult.status().code());
|
}
|
|
TEST_F(BpfBasicTest, TestCloseSocketWithoutUntag) {
|
SKIP_IF_BPF_NOT_SUPPORTED;
|
|
BpfMap<uint64_t, UidTag> cookieTagMap(mapRetrieve(COOKIE_TAG_MAP_PATH, 0));
|
ASSERT_LE(0, cookieTagMap.getMap());
|
int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0);
|
ASSERT_LE(0, sock);
|
uint64_t cookie = getSocketCookie(sock);
|
ASSERT_NE(NONEXISTENT_COOKIE, cookie);
|
ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID));
|
StatusOr<UidTag> tagResult = cookieTagMap.readValue(cookie);
|
ASSERT_TRUE(isOk(tagResult));
|
ASSERT_EQ(TEST_UID, tagResult.value().uid);
|
ASSERT_EQ(TEST_TAG, tagResult.value().tag);
|
ASSERT_EQ(0, close(sock));
|
// Check map periodically until sk destroy handler have done its job.
|
for (int i = 0; i < 10; i++) {
|
usleep(5000); // 5ms
|
tagResult = cookieTagMap.readValue(cookie);
|
if (!isOk(tagResult)) {
|
ASSERT_EQ(ENOENT, tagResult.status().code());
|
return;
|
}
|
}
|
FAIL() << "socket tag still exist after 50ms";
|
}
|
|
TEST_F(BpfBasicTest, TestChangeCounterSet) {
|
SKIP_IF_BPF_NOT_SUPPORTED;
|
|
BpfMap<uint32_t, uint8_t> uidCounterSetMap(mapRetrieve(UID_COUNTERSET_MAP_PATH, 0));
|
ASSERT_LE(0, uidCounterSetMap.getMap());
|
ASSERT_EQ(0, qtaguid_setCounterSet(TEST_COUNTERSET, TEST_UID));
|
uid_t uid = TEST_UID;
|
StatusOr<uint8_t> counterSetResult = uidCounterSetMap.readValue(uid);
|
ASSERT_TRUE(isOk(counterSetResult));
|
ASSERT_EQ(TEST_COUNTERSET, counterSetResult.value());
|
ASSERT_EQ(0, qtaguid_setCounterSet(DEFAULT_COUNTERSET, TEST_UID));
|
counterSetResult = uidCounterSetMap.readValue(uid);
|
ASSERT_FALSE(isOk(counterSetResult));
|
ASSERT_EQ(ENOENT, counterSetResult.status().code());
|
}
|
|
TEST_F(BpfBasicTest, TestDeleteTagData) {
|
SKIP_IF_BPF_NOT_SUPPORTED;
|
|
BpfMap<StatsKey, StatsValue> statsMapA(mapRetrieve(STATS_MAP_A_PATH, 0));
|
ASSERT_LE(0, statsMapA.getMap());
|
BpfMap<StatsKey, StatsValue> statsMapB(mapRetrieve(STATS_MAP_B_PATH, 0));
|
ASSERT_LE(0, statsMapB.getMap());
|
BpfMap<uint32_t, StatsValue> appUidStatsMap(mapRetrieve(APP_UID_STATS_MAP_PATH, 0));
|
ASSERT_LE(0, appUidStatsMap.getMap());
|
|
StatsKey key = {.uid = TEST_UID, .tag = TEST_TAG, .counterSet = TEST_COUNTERSET,
|
.ifaceIndex = 1};
|
StatsValue statsMapValue = {.rxPackets = 1, .rxBytes = 100};
|
EXPECT_TRUE(isOk(statsMapB.writeValue(key, statsMapValue, BPF_ANY)));
|
key.tag = 0;
|
EXPECT_TRUE(isOk(statsMapA.writeValue(key, statsMapValue, BPF_ANY)));
|
EXPECT_TRUE(isOk(appUidStatsMap.writeValue(TEST_UID, statsMapValue, BPF_ANY)));
|
ASSERT_EQ(0, qtaguid_deleteTagData(0, TEST_UID));
|
StatusOr<StatsValue> statsResult = statsMapA.readValue(key);
|
ASSERT_FALSE(isOk(statsResult));
|
ASSERT_EQ(ENOENT, statsResult.status().code());
|
statsResult = appUidStatsMap.readValue(TEST_UID);
|
ASSERT_FALSE(isOk(statsResult));
|
ASSERT_EQ(ENOENT, statsResult.status().code());
|
key.tag = TEST_TAG;
|
statsResult = statsMapB.readValue(key);
|
ASSERT_FALSE(isOk(statsResult));
|
ASSERT_EQ(ENOENT, statsResult.status().code());
|
}
|
|
}
|
}
|
