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mbed-os/UNITTESTS/moduletests/features/netsocket/IfaceDnsSocket/moduletest.cpp

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/*
* Copyright (c) 2019, Arm Limited and affiliates
* SPDX-License-Identifier: Apache-2.0
*
* 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 "gtest/gtest.h"
#include "gmock/gmock.h"
#include "nsapi_dns.h"
#include "features/netsocket/EthernetInterface.h"
#include "SocketAddress.h"
#include "EMAC_mock.h"
#include "OnboardNetworkStack_mock.h"
#include "EventQueue.h"
#include <future>
#include <thread>
#include <chrono>
#include <list>
// Control the rtos EventFlags stub. See EventFlags_stub.cpp
extern std::list<uint32_t> eventFlagsStubNextRetval;
using ::testing::_;
using ::testing::Return;
using ::testing::ReturnArg;
using ::testing::SaveArg;
using ::testing::SaveArgPointee;
using ::testing::SetArrayArgument;
using ::testing::SetArgPointee;
using ::testing::SetArgReferee;
using ::testing::DoAll;
// This is the bottom layer, that goes outside of module's scope.
// This would be implemented by LWIPInterface, NanostackInterface, or board-specific stack.
OnboardNetworkStack &OnboardNetworkStack::get_default_instance()
{
return OnboardNetworkStackMock::get_instance();
}
// Wrapper to avoid calling OnboardNetworkStack::get_default_instance() everywhere
static OnboardNetworkStackMock &stackMock() {
return OnboardNetworkStackMock::get_instance();
}
class Test_IfaceDnsSocket : public testing::Test {
public:
static nsapi_error_t call_in(int delay, mbed::Callback<void()> func)
{
(void) delay; // Ignore the delay, just call the callbacks in the order they came.
eventQueue.push_back(std::async(std::launch::deferred, func));
return NSAPI_ERROR_OK;
}
protected:
EthernetInterface *iface;
virtual void SetUp()
{
iface = new EthernetInterface(MockEMAC::get_instance(), OnboardNetworkStackMock::get_instance());;
nsapi_dns_reset();
eventQueue.clear();
hostname_cb_result = NSAPI_ERROR_DEVICE_ERROR;
hostname_cb_address = NULL;
}
virtual void TearDown()
{
delete iface;
}
void executeEventQueueCallbacks(void)
{
size_t events_num = eventQueue.size(); // Events will re-register themselves.
for (int i = 0; i < events_num; i++) {
eventQueue.front().get();
eventQueue.pop_front();
}
}
static std::list<std::future<void>> eventQueue;
static nsapi_error_t hostname_cb_result;
static SocketAddress *hostname_cb_address;
static void hostbyname_cb(nsapi_error_t result, SocketAddress *address)
{
hostname_cb_result = result;
if (result == 0) {
result = 1;
}
hostname_cb_address = new SocketAddress[result];
for (int i = 0; i < result; i++) {
hostname_cb_address[i].set_addr(address[i].get_addr());
}
}
static int query_id;
static constexpr unsigned int packet_ip4_size = 44;
static const unsigned char packet_ip4[packet_ip4_size];
static constexpr unsigned int packet_ip6_size = 56;
static const unsigned char packet_ip6[packet_ip6_size];
static constexpr unsigned int packet_ip4_3addresses_size = 76;
static const unsigned char packet_ip4_3addresses[packet_ip4_3addresses_size];
};
std::list<std::future<void>> Test_IfaceDnsSocket::eventQueue;
nsapi_error_t Test_IfaceDnsSocket::hostname_cb_result = NSAPI_ERROR_DEVICE_ERROR;
SocketAddress *Test_IfaceDnsSocket::hostname_cb_address = NULL;
int Test_IfaceDnsSocket::query_id = 1; // Default after nsapi_dns_reset()
// An actual google.com DNS resolution packet captured using a greentea test.
const unsigned char Test_IfaceDnsSocket::packet_ip4[Test_IfaceDnsSocket::packet_ip4_size] = {
0x00, 0x01, // ID
0x81, 0x80, // Flags
0x00, 0x01, // qdcount
0x00, 0x01, // ancount
0x00, 0x00, // nscount
0x00, 0x00, // arcount
0x06, // question, qdcount = 1, first byte is len = 6
0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, // body of the question
0x03, // len = 3
0x63, 0x6f, 0x6d, // body of the question qtype and qclass of the question
0x00, // len = 0
0x00, 0x01, // qtype
0x00, 0x01, // qclass
0xc0, // answer len = 192 (means this is a link)
0x0c, // this gets scanned away, because of previous byte being link
0x00, 0x01, // rtype: RR_A = 1, RR_AAAA = 28
0x00, 0x01, // rclass
0x00, 0x00, 0x00, 0x22, // ttl
0x00, 0x04, // rdlength (4 for IPv4 and 16 for IPv6)
0xd8, 0x3a, 0xcf, 0xee // Address bytes
};
// Same as previous packet, but with a fake IPv6 address instead of the IPv4 one
const unsigned char Test_IfaceDnsSocket::packet_ip6[Test_IfaceDnsSocket::packet_ip6_size] = {
0x00, 0x01, // ID
0x81, 0x80, // Flags
0x00, 0x01, // qdcount
0x00, 0x01, // ancount
0x00, 0x00, // nscount
0x00, 0x00, // arcount
0x06, // question, qdcount = 1, first byte is len = 6
0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, // body of the question
0x03, // len = 3
0x63, 0x6f, 0x6d, // body of the question qtype and qclass of the question
0x00, // len = 0
0x00, 0x01, // qtype
0x00, 0x01, // qclass
0xc0, // answer len = 192 (means this is a link)
0x0c, // this gets scanned away, because of previous byte being link
0x00, 0x1c, // rtype: RR_A = 1, RR_AAAA = 28
0x00, 0x01, // rclass
0x00, 0x00, 0x00, 0x22, // ttl
0x00, 0x10, // rdlength (4 for IPv4 and 16 for IPv6)
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10 // Address bytes
};
// Same as packet_ipv4, but with two fake ipv4 appended at the end.
const unsigned char Test_IfaceDnsSocket::packet_ip4_3addresses[Test_IfaceDnsSocket::packet_ip4_3addresses_size] = {
0x00, 0x01, // ID
0x81, 0x80, // Flags
0x00, 0x01, // qdcount
0x00, 0x03, // ancount
0x00, 0x00, // nscount
0x00, 0x00, // arcount
0x06, // question, qdcount = 1, first byte is len = 6
0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, // body of the question
0x03, // len = 3
0x63, 0x6f, 0x6d, // body of the question qtype and qclass of the question
0x00, // len = 0
0x00, 0x01, // qtype
0x00, 0x01, // qclass
0xc0, // answer len = 192 (means this is a link)
0x0c, // this gets scanned away, because of previous byte being link
0x00, 0x01, // rtype: RR_A = 1, RR_AAAA = 28
0x00, 0x01, // rclass
0x00, 0x00, 0x00, 0x22, // ttl
0x00, 0x04, // rdlength (4 for IPv4 and 16 for IPv6)
0xd8, 0x3a, 0xcf, 0xee, // Address bytes
0xc0, // answer len = 192 (means this is a link)
0x0c, // this gets scanned away, because of previous byte being link
0x00, 0x01, // rtype: RR_A = 1, RR_AAAA = 28
0x00, 0x01, // rclass
0x00, 0x00, 0x00, 0x22, // ttl
0x00, 0x04, // rdlength (4 for IPv4 and 16 for IPv6)
0xde, 0xad, 0xbe, 0xef, // Address bytes
0xc0, // answer len = 192 (means this is a link)
0x0c, // this gets scanned away, because of previous byte being link
0x00, 0x01, // rtype: RR_A = 1, RR_AAAA = 28
0x00, 0x01, // rclass
0x00, 0x00, 0x00, 0x22, // ttl
0x00, 0x04, // rdlength (4 for IPv4 and 16 for IPv6)
0x01, 0x02, 0x03, 0x04 // Address bytes
};
// We cannot use SetArgArray, because this is void* type.
// Use a manual for loop, to avoid depending on local implementation of strncpy (had some issues with it).
ACTION_P2(SetArg2ToCharPtr, value, size)
{
for (int i = 0; i < size; i++) {
static_cast<char *>(arg2)[i] = reinterpret_cast<const char *>(value)[i];
}
}
TEST_F(Test_IfaceDnsSocket, single_query)
{
SocketAddress addr;
// Make sure socket opens successfully
EXPECT_CALL(stackMock(), socket_open(_, NSAPI_UDP))
.Times(1)
.WillOnce(DoAll(SetArgPointee<0>((void **)&stackMock()), Return(NSAPI_ERROR_OK)));
// Returning UNSUPPORTED will cause the nsapi_dns addresses to be used.
EXPECT_CALL(stackMock(), get_dns_server(_, _, _))
.Times(1)
.WillOnce(DoAll(SetArgPointee<1>(SocketAddress("1.2.3.4", 53)), Return(NSAPI_ERROR_OK)));
EXPECT_CALL(stackMock(), socket_sendto(_, _, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
// Return a predefined google.com resolution packet.
EXPECT_CALL(stackMock(), socket_recvfrom(_, _, _, _))
.Times(1)
.WillOnce(DoAll(SetArg2ToCharPtr(Test_IfaceDnsSocket::packet_ip4, Test_IfaceDnsSocket::packet_ip4_size), Return(Test_IfaceDnsSocket::packet_ip4_size)));
EXPECT_CALL(stackMock(), socket_close(_)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_query(iface, "www.google.com", &addr));
EXPECT_EQ(addr.get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(addr.get_ip_address(), "216.58.207.238", sizeof("216.58.207.238")));
// Do not set any return values. Second call should use cache.
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_query(iface, "www.google.com", &addr));
EXPECT_EQ(addr.get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(addr.get_ip_address(), "216.58.207.238", sizeof("216.58.207.238")));
}
TEST_F(Test_IfaceDnsSocket, single_query_ip6)
{
SocketAddress addr;
// Make sure socket opens successfully
EXPECT_CALL(stackMock(), socket_open(_, NSAPI_UDP))
.Times(1)
.WillOnce(DoAll(SetArgPointee<0>((void **)&stackMock()), Return(NSAPI_ERROR_OK)));
// Returning UNSUPPORTED will cause the nsapi_dns addresses to be used.
EXPECT_CALL(stackMock(), get_dns_server(_, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_UNSUPPORTED));
// We want to send one query to the DNS server.
EXPECT_CALL(stackMock(), socket_sendto(_, _, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
// Return a predefined google.com resolution packet.
EXPECT_CALL(stackMock(), socket_recvfrom(_, _, _, _))
.Times(1)
.WillOnce(DoAll(SetArg2ToCharPtr(Test_IfaceDnsSocket::packet_ip6, Test_IfaceDnsSocket::packet_ip6_size), Return(Test_IfaceDnsSocket::packet_ip6_size)));
EXPECT_CALL(stackMock(), socket_close(_)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_query(iface, "www.google.com", &addr, NSAPI_IPv6));
EXPECT_EQ(addr.get_ip_version(), NSAPI_IPv6);
EXPECT_FALSE(strncmp(addr.get_ip_address(), "102:304:506:708:90a:b0c:d0e:f10", sizeof("102:304:506:708:90a:b0c:d0e:f10")));
// Do not set any return values. Second call should use cache.
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_query(iface, "www.google.com", &addr, NSAPI_IPv6));
EXPECT_EQ(addr.get_ip_version(), NSAPI_IPv6);
EXPECT_FALSE(strncmp(addr.get_ip_address(), "102:304:506:708:90a:b0c:d0e:f10", sizeof("102:304:506:708:90a:b0c:d0e:f10")));
}
TEST_F(Test_IfaceDnsSocket, multiple_queries)
{
// Make sure socket opens successfully
EXPECT_CALL(stackMock(), socket_open(_, NSAPI_UDP))
.Times(1)
.WillOnce(DoAll(SetArgPointee<0>((void **)&stackMock()), Return(NSAPI_ERROR_OK)));
EXPECT_CALL(stackMock(), get_dns_server(_, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_UNSUPPORTED));
EXPECT_CALL(stackMock(), socket_sendto(_, _, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
// Return a predefined google.com resolution packet.
EXPECT_CALL(stackMock(), socket_recvfrom(_, _, _, _))
.Times(1)
.WillOnce(DoAll(SetArg2ToCharPtr(Test_IfaceDnsSocket::packet_ip4_3addresses, Test_IfaceDnsSocket::packet_ip4_3addresses_size), Return(Test_IfaceDnsSocket::packet_ip4_3addresses_size)));
EXPECT_CALL(stackMock(), socket_close(_)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
SocketAddress *addr;
SocketAddress hints{{NSAPI_UNSPEC}, 443};
EXPECT_EQ(3, iface->getaddrinfo("www.google.com", &hints, &addr));
EXPECT_EQ(addr[0].get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(addr[0].get_ip_address(), "216.58.207.238", sizeof("216.58.207.238")));
EXPECT_EQ(addr[1].get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(addr[1].get_ip_address(), "222.173.190.239", sizeof("222.173.190.239")));
EXPECT_EQ(addr[2].get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(addr[2].get_ip_address(), "1.2.3.4", sizeof("1.2.3.4")));
delete[] addr;
SocketAddress *addr_cache;
// Cache will only raturn one address.
EXPECT_EQ(3, iface->getaddrinfo("www.google.com", &hints, &addr_cache));
EXPECT_EQ(addr_cache[0].get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(addr_cache[0].get_ip_address(), "216.58.207.238", sizeof("216.58.207.238")));
EXPECT_EQ(addr_cache[1].get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(addr_cache[1].get_ip_address(), "222.173.190.239", sizeof("222.173.190.239")));
EXPECT_EQ(addr_cache[2].get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(addr_cache[2].get_ip_address(), "1.2.3.4", sizeof("1.2.3.4")));
delete[] addr_cache;
}
TEST_F(Test_IfaceDnsSocket, single_query_errors)
{
testing::InSequence s;
SocketAddress addr {};
// Error - empty host name
EXPECT_EQ(NSAPI_ERROR_PARAMETER, nsapi_dns_query(iface, "", &addr));
EXPECT_EQ(NSAPI_ERROR_PARAMETER, nsapi_dns_query_multiple_async(&stackMock(), "", &Test_IfaceDnsSocket::hostbyname_cb, 5, &Test_IfaceDnsSocket::call_in, NULL));
// Error - socket_open failing
// Make sure socket opens successfully
EXPECT_CALL(stackMock(), socket_open(_, NSAPI_UDP))
.Times(1)
.WillOnce(DoAll(SetArgPointee<0>((void **)NULL), Return(NSAPI_ERROR_DEVICE_ERROR)));
EXPECT_EQ(NSAPI_ERROR_DEVICE_ERROR, nsapi_dns_query(iface, "www.google.com", &addr));
}
TEST_F(Test_IfaceDnsSocket, simultaneous_query_async)
{
// Make sure socket opens successfully
EXPECT_CALL(stackMock(), socket_open(_, NSAPI_UDP))
.Times(1)
.WillOnce(DoAll(SetArgPointee<0>((void **)&stackMock()), Return(NSAPI_ERROR_OK)));
EXPECT_CALL(stackMock(), get_dns_server(_, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_UNSUPPORTED));
EXPECT_CALL(stackMock(), socket_sendto(_, _, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
{
testing::InSequence s;
// Return a predefined google.com resolution packet.
EXPECT_CALL(stackMock(), socket_recvfrom(_, _, _, _))
.Times(1)
.WillOnce(DoAll(SetArg2ToCharPtr(Test_IfaceDnsSocket::packet_ip4, Test_IfaceDnsSocket::packet_ip4_size), Return(Test_IfaceDnsSocket::packet_ip4_size)));
// There will be another try to recv from the socket, return 0, to show that no data is pending.
EXPECT_CALL(stackMock(), socket_recvfrom(_, _, _, _))
.Times(1)
.WillOnce(Return(0));
}
EXPECT_CALL(stackMock(), socket_close(_)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
EXPECT_EQ(Test_IfaceDnsSocket::query_id, nsapi_dns_query_async(&stackMock(), "www.google.com", &Test_IfaceDnsSocket::hostbyname_cb, Test_IfaceDnsSocket::call_in, NSAPI_IPv4));
// Let another query to be stored in the queue.
EXPECT_EQ(Test_IfaceDnsSocket::query_id + 1, nsapi_dns_query_async(&stackMock(), "www.amazon.com", &Test_IfaceDnsSocket::hostbyname_cb, Test_IfaceDnsSocket::call_in, NSAPI_IPv4));
executeEventQueueCallbacks();
// This will register the socket_callback.
reinterpret_cast<mbed::Callback<void(void *)> *>((&stackMock())->socket_cb)->call((void *)packet_ip4);
// Run through registered callbacks again, to execute socket_callback_handle
executeEventQueueCallbacks();
// Run again to execute response_handler
executeEventQueueCallbacks();
EXPECT_EQ(1, Test_IfaceDnsSocket::hostname_cb_result);
EXPECT_EQ(Test_IfaceDnsSocket::hostname_cb_address[0].get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(Test_IfaceDnsSocket::hostname_cb_address[0].get_ip_address(), "216.58.207.238", sizeof("216.58.207.238")));
delete[] Test_IfaceDnsSocket::hostname_cb_address;
// Second call should use cache.
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_query_async(&stackMock(), "www.google.com", &Test_IfaceDnsSocket::hostbyname_cb, Test_IfaceDnsSocket::call_in, NSAPI_IPv4));
EXPECT_EQ(Test_IfaceDnsSocket::hostname_cb_address[0].get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(Test_IfaceDnsSocket::hostname_cb_address[0].get_ip_address(), "216.58.207.238", sizeof("216.58.207.238")));
delete[] Test_IfaceDnsSocket::hostname_cb_address;
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_query_async_cancel((intptr_t)Test_IfaceDnsSocket::query_id + 1));
}
// Imitate the getaddrinfo to make the example more real-life.
// No way to replace this with NetworkInterface:getaddrinfo_async, because we can't pass a call_in cb.
int getaddrinfo_async(NetworkStack *stack, const char *hostname, NetworkStack::hostbyname_cb_t cb)
{
return nsapi_dns_query_multiple_async(stack, hostname, cb, 5, &Test_IfaceDnsSocket::call_in, NULL);
}
TEST_F(Test_IfaceDnsSocket, single_query_async_multiple)
{
// Make sure socket opens successfully
EXPECT_CALL(stackMock(), socket_open(_, NSAPI_UDP))
.Times(1)
.WillOnce(DoAll(SetArgPointee<0>((void **)&stackMock()), Return(NSAPI_ERROR_OK)));
EXPECT_CALL(stackMock(), get_dns_server(_, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_UNSUPPORTED));
EXPECT_CALL(stackMock(), socket_sendto(_, _, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
{
testing::InSequence s;
// Return a predefined google.com resolution packet.
EXPECT_CALL(stackMock(), socket_recvfrom(_, _, _, _))
.Times(1)
.WillOnce(DoAll(SetArg2ToCharPtr(Test_IfaceDnsSocket::packet_ip4_3addresses, Test_IfaceDnsSocket::packet_ip4_3addresses_size), Return(Test_IfaceDnsSocket::packet_ip4_3addresses_size)));
// There will be another try to recv from the socket, return 0, to show that no data is pending.
EXPECT_CALL(stackMock(), socket_recvfrom(_, _, _, _))
.Times(1)
.WillOnce(Return(0));
}
EXPECT_CALL(stackMock(), socket_close(_)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
EXPECT_EQ(Test_IfaceDnsSocket::query_id, getaddrinfo_async(&stackMock(), "www.google.com", &Test_IfaceDnsSocket::hostbyname_cb));
executeEventQueueCallbacks();
// This will register the socket_callback.
reinterpret_cast<mbed::Callback<void(void *)> *>((&stackMock())->socket_cb)->call((void *)packet_ip4);
// Run through registered callbacks again, to execute socket_callback_handle
executeEventQueueCallbacks();
// Run again to execute response_handler
executeEventQueueCallbacks();
EXPECT_EQ(3, Test_IfaceDnsSocket::hostname_cb_result);
EXPECT_EQ(Test_IfaceDnsSocket::hostname_cb_address[0].get_ip_version(), NSAPI_IPv4);
EXPECT_EQ(Test_IfaceDnsSocket::hostname_cb_address[1].get_ip_version(), NSAPI_IPv4);
EXPECT_EQ(Test_IfaceDnsSocket::hostname_cb_address[2].get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(Test_IfaceDnsSocket::hostname_cb_address[0].get_ip_address(), "216.58.207.238", sizeof("216.58.207.238")));
EXPECT_FALSE(strncmp(Test_IfaceDnsSocket::hostname_cb_address[1].get_ip_address(), "222.173.190.239", sizeof("222.173.190.239")));
EXPECT_FALSE(strncmp(Test_IfaceDnsSocket::hostname_cb_address[2].get_ip_address(), "1.2.3.4", sizeof("1.2.3.4")));
delete[] Test_IfaceDnsSocket::hostname_cb_address;
Test_IfaceDnsSocket::hostname_cb_result = NSAPI_ERROR_DEVICE_ERROR;
// Do not set any return values. Second call should use cache.
EXPECT_EQ(3, getaddrinfo_async(&stackMock(), "www.google.com", &Test_IfaceDnsSocket::hostbyname_cb));
EXPECT_EQ(3, Test_IfaceDnsSocket::hostname_cb_result);
EXPECT_EQ(Test_IfaceDnsSocket::hostname_cb_address[0].get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(Test_IfaceDnsSocket::hostname_cb_address[0].get_ip_address(), "216.58.207.238", sizeof("216.58.207.238")));
EXPECT_FALSE(strncmp(Test_IfaceDnsSocket::hostname_cb_address[1].get_ip_address(), "222.173.190.239", sizeof("222.173.190.239")));
EXPECT_FALSE(strncmp(Test_IfaceDnsSocket::hostname_cb_address[2].get_ip_address(), "1.2.3.4", sizeof("1.2.3.4")));
delete[] Test_IfaceDnsSocket::hostname_cb_address;
}
TEST_F(Test_IfaceDnsSocket, async_cancel)
{
EXPECT_EQ(Test_IfaceDnsSocket::query_id, nsapi_dns_query_async(&stackMock(), "www.google.com", &Test_IfaceDnsSocket::hostbyname_cb, Test_IfaceDnsSocket::call_in, NSAPI_IPv4));
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_query_async_cancel((intptr_t)1));
executeEventQueueCallbacks();
EXPECT_EQ(NSAPI_ERROR_DEVICE_ERROR, Test_IfaceDnsSocket::hostname_cb_result);
EXPECT_EQ(NULL, Test_IfaceDnsSocket::hostname_cb_address);
// Try to cancel twice - should return error
EXPECT_EQ(NSAPI_ERROR_PARAMETER, nsapi_dns_query_async_cancel((intptr_t)1));
}
TEST_F(Test_IfaceDnsSocket, add_server)
{
SocketAddress server_address("1.2.3.4", 53);
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_add_server(server_address, NULL));
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_add_server(server_address, NULL)); // Duplicate add - no error.
SocketAddress addr;
// Make sure socket opens successfully
EXPECT_CALL(stackMock(), socket_open(_, NSAPI_UDP))
.Times(1)
.WillOnce(DoAll(SetArgPointee<0>((void **)&stackMock()), Return(NSAPI_ERROR_OK)));
EXPECT_CALL(stackMock(), get_dns_server(_, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_UNSUPPORTED));
EXPECT_CALL(stackMock(), socket_sendto(_, server_address, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
EXPECT_CALL(stackMock(), socket_close(_)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
// Return a predefined google.com resolution packet.
EXPECT_CALL(stackMock(), socket_recvfrom(_, _, _, _))
.Times(1)
.WillOnce(DoAll(SetArg2ToCharPtr(Test_IfaceDnsSocket::packet_ip4, Test_IfaceDnsSocket::packet_ip4_size), Return(Test_IfaceDnsSocket::packet_ip4_size)));
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_query(iface, "www.google.com", &addr));
EXPECT_EQ(addr.get_ip_version(), NSAPI_IPv4);
EXPECT_FALSE(strncmp(addr.get_ip_address(), "216.58.207.238", sizeof("216.58.207.238")));
}
TEST_F(Test_IfaceDnsSocket, attempts)
{
constexpr int DNS_SERVER_SIZE = 5; // This must be kept equal to DNS_SERVER_SIZE macro define in nsapi_dns.cpp
// Replace existing servers, so we can see that the switch to next server occurs.
SocketAddress known_server_address[DNS_SERVER_SIZE];
for (uint8_t i = DNS_SERVER_SIZE; i > 0; i--) {
uint8_t bytes[NSAPI_IPv4_SIZE] = {i, i, i, i};
known_server_address[i - 1] = SocketAddress(bytes, NSAPI_IPv4, 53);
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_add_server(known_server_address[i - 1], NULL));
}
SocketAddress addr {};
testing::InSequence s;
// Make sure socket opens successfully
EXPECT_CALL(stackMock(), socket_open(_, NSAPI_UDP))
.Times(1)
.WillOnce(DoAll(SetArgPointee<0>((void **)&stackMock()), Return(NSAPI_ERROR_OK)));
EXPECT_CALL(stackMock(), get_dns_server(_, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_UNSUPPORTED));
int attempt = 0;
while (attempt < DNS_SERVER_SIZE) {
EXPECT_CALL(stackMock(), socket_sendto(_, known_server_address[attempt % DNS_SERVER_SIZE], _, _))
.Times(1)
.WillRepeatedly(Return(NSAPI_ERROR_DEVICE_ERROR));
attempt++;
if (attempt >= DNS_SERVER_SIZE) {
break;
}
}
EXPECT_CALL(stackMock(), socket_close(_)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
EXPECT_EQ(NSAPI_ERROR_DNS_FAILURE, nsapi_dns_query(iface, "www.google.com", &addr));
}
TEST_F(Test_IfaceDnsSocket, retries_attempts)
{
constexpr int DNS_SERVER_SIZE = 5; // This must be kept equal to DNS_SERVER_SIZE macro define in nsapi_dns.cpp
// Replace existing servers, so we can see that the switch to next server occurs.
SocketAddress known_server_address[DNS_SERVER_SIZE];
for (uint8_t i = DNS_SERVER_SIZE; i > 0; i--) {
uint8_t bytes[NSAPI_IPv4_SIZE] = {i, i, i, i};
known_server_address[i - 1] = SocketAddress(bytes, NSAPI_IPv4, 53);
EXPECT_EQ(NSAPI_ERROR_OK, nsapi_dns_add_server(known_server_address[i - 1], NULL));
}
SocketAddress addr {};
testing::InSequence s;
// Make sure socket opens successfully
EXPECT_CALL(stackMock(), socket_open(_, NSAPI_UDP))
.Times(1)
.WillOnce(DoAll(SetArgPointee<0>((void **)&stackMock()), Return(NSAPI_ERROR_OK)));
EXPECT_CALL(stackMock(), get_dns_server(_, _, _)).Times(1).WillOnce(Return(NSAPI_ERROR_UNSUPPORTED));
// Set up all the expectation: sendto and recvfrom should come one after another, untill dns runs out of attempts.
int attempt = 0;
while (attempt < MBED_CONF_NSAPI_DNS_TOTAL_ATTEMPTS) {
// We will retry the first server MBED_CONF_NSAPI_DNS_RETRIES times.
int retry = 0;
while (retry < MBED_CONF_NSAPI_DNS_RETRIES + 1) {
int server_idx = attempt / (MBED_CONF_NSAPI_DNS_RETRIES + 1);
EXPECT_CALL(stackMock(), socket_sendto(_, known_server_address[server_idx % DNS_SERVER_SIZE], _, _))
.Times(1)
.WillRepeatedly(Return(NSAPI_ERROR_OK));
eventFlagsStubNextRetval.push_back(osFlagsError); // Break the wait loop
// Make sure the retries will be necessary.
EXPECT_CALL(stackMock(), socket_recvfrom(_, _, _, _))
.Times(1)
.WillRepeatedly(Return(NSAPI_ERROR_WOULD_BLOCK));
attempt++;
retry++;
if (attempt >= MBED_CONF_NSAPI_DNS_TOTAL_ATTEMPTS) {
break;
}
}
}
EXPECT_CALL(stackMock(), socket_close(_)).Times(1).WillOnce(Return(NSAPI_ERROR_OK));
EXPECT_EQ(NSAPI_ERROR_DNS_FAILURE, nsapi_dns_query(iface, "www.google.com", &addr));
}
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