| /* |
| * Copyright (C) 2017 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 "common/libs/net/netlink_client.h" |
| |
| #include <linux/rtnetlink.h> |
| |
| #include <gmock/gmock.h> |
| #include <gtest/gtest.h> |
| |
| #include <iostream> |
| #include <memory> |
| |
| using ::testing::ElementsAreArray; |
| using ::testing::MatchResultListener; |
| using ::testing::Return; |
| |
| namespace avd { |
| namespace { |
| extern "C" void klog_write(int /* level */, const char* /* format */, ...) {} |
| |
| // Dump hex buffer to test log. |
| void Dump(MatchResultListener* result_listener, const char* title, |
| const uint8_t* data, size_t length) { |
| for (size_t item = 0; item < length;) { |
| *result_listener << title; |
| do { |
| result_listener->stream()->width(2); |
| result_listener->stream()->fill('0'); |
| *result_listener << std::hex << +data[item] << " "; |
| ++item; |
| } while (item & 0xf); |
| *result_listener << "\n"; |
| } |
| } |
| |
| // Compare two memory areas byte by byte, print information about first |
| // difference. Dumps both bufferst to user log. |
| bool Compare(MatchResultListener* result_listener, |
| const uint8_t* exp, const uint8_t* act, size_t length) { |
| for (size_t index = 0; index < length; ++index) { |
| if (exp[index] != act[index]) { |
| *result_listener << "\nUnexpected data at offset " << index << "\n"; |
| Dump(result_listener, "Data Expected: ", exp, length); |
| Dump(result_listener, " Data Actual: ", act, length); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| // Matcher validating Netlink Request data. |
| MATCHER_P2(RequestDataIs, data, length, "Matches expected request data") { |
| size_t offset = sizeof(nlmsghdr); |
| if (offset + length != arg->RequestLength()) { |
| *result_listener << "Unexpected request length: " |
| << arg->RequestLength() - offset << " vs " << length; |
| return false; |
| } |
| |
| // Note: Request begins with header (nlmsghdr). Header is not covered by this |
| // call. |
| const uint8_t* exp_data = static_cast<const uint8_t*>( |
| static_cast<const void*>(data)); |
| const uint8_t* act_data = static_cast<const uint8_t*>(arg->RequestData()); |
| return Compare( |
| result_listener, exp_data, &act_data[offset], length); |
| } |
| |
| MATCHER_P4(RequestHeaderIs, length, type, flags, seq, |
| "Matches request header") { |
| nlmsghdr* header = static_cast<nlmsghdr*>(arg->RequestData()); |
| if (arg->RequestLength() < sizeof(header)) { |
| *result_listener << "Malformed header: too short."; |
| return false; |
| } |
| |
| if (header->nlmsg_len != length) { |
| *result_listener << "Invalid message length: " |
| << header->nlmsg_len << " vs " << length; |
| return false; |
| } |
| |
| if (header->nlmsg_type != type) { |
| *result_listener << "Invalid header type: " |
| << header->nlmsg_type << " vs " << type; |
| return false; |
| } |
| |
| if (header->nlmsg_flags != flags) { |
| *result_listener << "Invalid header flags: " |
| << header->nlmsg_flags << " vs " << flags; |
| return false; |
| } |
| |
| if (header->nlmsg_seq != seq) { |
| *result_listener << "Invalid header sequence number: " |
| << header->nlmsg_seq << " vs " << seq; |
| return false; |
| } |
| |
| return true; |
| } |
| } // namespace |
| |
| class NetlinkClientTest : public ::testing::Test { |
| protected: |
| std::unique_ptr<NetlinkClient> nl_client_; |
| }; |
| |
| TEST_F(NetlinkClientTest, BasicStringNode) { |
| constexpr uint16_t kDummyTag = 0xfce2; |
| constexpr char kLongString[] = "long string"; |
| |
| struct { |
| const uint16_t attr_length = 0xf; // 11 bytes of text + 4 bytes of header. |
| const uint16_t attr_type = kDummyTag; |
| char text[sizeof(kLongString)]; // sizeof includes padding 0. |
| } expected; |
| |
| memcpy(&expected.text, kLongString, sizeof(kLongString)); |
| |
| auto request = |
| avd::NetlinkRequest::New(RTM_SETLINK, 0); |
| request->AddString(kDummyTag, kLongString); |
| EXPECT_THAT(request, RequestDataIs(&expected, sizeof(expected))); |
| } |
| |
| TEST_F(NetlinkClientTest, NoForcedStringPadding) { |
| // Strings with length being a multiple of four should not get additional zero |
| // padding. |
| constexpr uint16_t kDummyTag = 0xfce2; |
| constexpr char kShortString[] = "four"; // Keep 4 bytes |
| |
| struct { |
| const uint16_t attr_length = 0x8; // 4 bytes of text + 4 bytes of header. |
| const uint16_t attr_type = kDummyTag; |
| char text[4]; |
| } expected; |
| |
| memcpy(&expected.text, kShortString, sizeof(expected.text)); |
| |
| auto request = |
| avd::NetlinkRequest::New(RTM_SETLINK, 0); |
| request->AddString(kDummyTag, kShortString); |
| EXPECT_THAT(request, RequestDataIs(&expected, sizeof(expected))); |
| } |
| |
| TEST_F(NetlinkClientTest, BasicIntNode) { |
| // Basic { Dummy: Value } test. |
| constexpr uint16_t kDummyTag = 0xfce2; |
| constexpr int32_t kValue = 0x1badd00d; |
| |
| struct { |
| const uint16_t attr_length = 0x8; // 4 bytes of value + 4 bytes of header. |
| const uint16_t attr_type = kDummyTag; |
| const uint32_t attr_value = kValue; |
| } expected; |
| |
| auto request = |
| avd::NetlinkRequest::New(RTM_SETLINK, 0); |
| request->AddInt32(kDummyTag, kValue); |
| EXPECT_THAT(request, RequestDataIs(&expected, sizeof(expected))); |
| } |
| |
| TEST_F(NetlinkClientTest, SingleList) { |
| // List: { Dummy: Value} |
| constexpr uint16_t kDummyTag = 0xfce2; |
| constexpr uint16_t kListTag = 0xcafe; |
| constexpr int32_t kValue = 0x1badd00d; |
| |
| struct { |
| const uint16_t list_length = 0xc; |
| const uint16_t list_type = kListTag; |
| const uint16_t attr_length = 0x8; // 4 bytes of value + 4 bytes of header. |
| const uint16_t attr_type = kDummyTag; |
| const uint32_t attr_value = kValue; |
| } expected; |
| |
| auto request = |
| avd::NetlinkRequest::New(RTM_SETLINK, 0); |
| request->PushList(kListTag); |
| request->AddInt32(kDummyTag, kValue); |
| request->PopList(); |
| |
| EXPECT_THAT(request, RequestDataIs(&expected, sizeof(expected))); |
| } |
| |
| TEST_F(NetlinkClientTest, NestedList) { |
| // List1: { List2: { Dummy: Value}} |
| constexpr uint16_t kDummyTag = 0xfce2; |
| constexpr uint16_t kList1Tag = 0xcafe; |
| constexpr uint16_t kList2Tag = 0xfeed; |
| constexpr int32_t kValue = 0x1badd00d; |
| |
| struct { |
| const uint16_t list1_length = 0x10; |
| const uint16_t list1_type = kList1Tag; |
| const uint16_t list2_length = 0xc; |
| const uint16_t list2_type = kList2Tag; |
| const uint16_t attr_length = 0x8; |
| const uint16_t attr_type = kDummyTag; |
| const uint32_t attr_value = kValue; |
| } expected; |
| |
| auto request = |
| avd::NetlinkRequest::New(RTM_SETLINK, 0); |
| request->PushList(kList1Tag); |
| request->PushList(kList2Tag); |
| request->AddInt32(kDummyTag, kValue); |
| request->PopList(); |
| request->PopList(); |
| |
| EXPECT_THAT(request, RequestDataIs(&expected, sizeof(expected))); |
| } |
| |
| TEST_F(NetlinkClientTest, ListSequence) { |
| // List1: { Dummy1: Value1}, List2: { Dummy2: Value2 } |
| constexpr uint16_t kDummy1Tag = 0xfce2; |
| constexpr uint16_t kDummy2Tag = 0xfd38; |
| constexpr uint16_t kList1Tag = 0xcafe; |
| constexpr uint16_t kList2Tag = 0xfeed; |
| constexpr int32_t kValue1 = 0x1badd00d; |
| constexpr int32_t kValue2 = 0xfee1; |
| |
| struct { |
| const uint16_t list1_length = 0xc; |
| const uint16_t list1_type = kList1Tag; |
| const uint16_t attr1_length = 0x8; |
| const uint16_t attr1_type = kDummy1Tag; |
| const uint32_t attr1_value = kValue1; |
| const uint16_t list2_length = 0xc; |
| const uint16_t list2_type = kList2Tag; |
| const uint16_t attr2_length = 0x8; |
| const uint16_t attr2_type = kDummy2Tag; |
| const uint32_t attr2_value = kValue2; |
| } expected; |
| |
| auto request = |
| avd::NetlinkRequest::New(RTM_SETLINK, 0); |
| request->PushList(kList1Tag); |
| request->AddInt32(kDummy1Tag, kValue1); |
| request->PopList(); |
| request->PushList(kList2Tag); |
| request->AddInt32(kDummy2Tag, kValue2); |
| request->PopList(); |
| |
| EXPECT_THAT(request, RequestDataIs(&expected, sizeof(expected))); |
| } |
| |
| TEST_F(NetlinkClientTest, ComplexList) { |
| // List1: { List2: { Dummy1: Value1 }, Dummy2: Value2 } |
| constexpr uint16_t kDummy1Tag = 0xfce2; |
| constexpr uint16_t kDummy2Tag = 0xfd38; |
| constexpr uint16_t kList1Tag = 0xcafe; |
| constexpr uint16_t kList2Tag = 0xfeed; |
| constexpr int32_t kValue1 = 0x1badd00d; |
| constexpr int32_t kValue2 = 0xfee1; |
| |
| struct { |
| const uint16_t list1_length = 0x18; |
| const uint16_t list1_type = kList1Tag; |
| const uint16_t list2_length = 0xc; // Note, this only covers until kValue1. |
| const uint16_t list2_type = kList2Tag; |
| const uint16_t attr1_length = 0x8; |
| const uint16_t attr1_type = kDummy1Tag; |
| const uint32_t attr1_value = kValue1; |
| const uint16_t attr2_length = 0x8; |
| const uint16_t attr2_type = kDummy2Tag; |
| const uint32_t attr2_value = kValue2; |
| } expected; |
| |
| auto request = |
| avd::NetlinkRequest::New(RTM_SETLINK, 0); |
| request->PushList(kList1Tag); |
| request->PushList(kList2Tag); |
| request->AddInt32(kDummy1Tag, kValue1); |
| request->PopList(); |
| request->AddInt32(kDummy2Tag, kValue2); |
| request->PopList(); |
| |
| EXPECT_THAT(request, RequestDataIs(&expected, sizeof(expected))); |
| } |
| |
| TEST_F(NetlinkClientTest, SimpleNetlinkCreateHeader) { |
| auto request = |
| avd::NetlinkRequest::New(RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL); |
| constexpr char kValue[] = "random string"; |
| request->AddString(0, kValue); // Have something to work with. |
| |
| constexpr size_t kMsgLength = |
| sizeof(nlmsghdr) + sizeof(nlattr) + RTA_ALIGN(sizeof(kValue)); |
| |
| EXPECT_THAT(request, RequestHeaderIs( |
| kMsgLength, // Expected size of message. |
| RTM_NEWLINK, // Results from creane_new_iface=true in CreateRequest. |
| NLM_F_ACK | NLM_F_CREATE | NLM_F_EXCL | NLM_F_REQUEST, // Ditto. |
| 0u)); |
| } |
| |
| TEST_F(NetlinkClientTest, SimpleNetlinkUpdateHeader) { |
| auto request = |
| avd::NetlinkRequest::New(RTM_SETLINK, 0); |
| constexpr char kValue[] = "random string"; |
| request->AddString(0, kValue); // Have something to work with. |
| |
| constexpr size_t kMsgLength = |
| sizeof(nlmsghdr) + sizeof(nlattr) + RTA_ALIGN(sizeof(kValue)); |
| |
| EXPECT_THAT(request, RequestHeaderIs( |
| kMsgLength, // Expected size of message. |
| RTM_SETLINK, // Results from creane_new_iface=true in CreateRequest. |
| NLM_F_REQUEST | NLM_F_ACK, // Ditto. |
| 0u)); |
| } |
| |
| } // namespace avd |