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Network Socket test plan

This is a test plan for the Mbed OS Socket API. This describes all test cases and their intended behaviors. When an API document is not clear, use this as a reference for implementing correct behavior.

NOTE: Because testing is a moving target, this test plan might define more test cases than Mbed OS implements. Refer to test case priorities for a list of test cases that the target must pass to be compliant with the Mbed OS socket API.

Target API

The target for this plan is to test:

See Network Socket Documentation for reference.

Tools to use

These test cases themselves do not require any special tooling, other than the test server described in "Test environment" chapter.

Test environment

As a general guideline, network connectivity with public Internet access is required. This satisfies Socket tests, but specific connectivity methods might require some extra configuration or devices within the network.

The test environment consist of DUTs, network connection and the test server. Arm provides a public test server, but it can be installed locally as well, if an isolated test environment is required.

Public test server

Address: echo.mbedcloudtesting.com

Both IPv4 and IPv6 addresses are available from a public DNS service:

$ host echo.mbedcloudtesting.com
echo.mbedcloudtesting.com has address 52.215.34.155
echo.mbedcloudtesting.com has IPv6 address 2a05:d018:21f:3800:8584:60f8:bc9f:e614

Open services in the test server

  • Echo protocol, RFC 862 is enabled in both TCP and UDP. Port 7. Port 2007 for TLS.
  • Discard protocol, RFC 863 is enabled in both TCP and UDP. Port 9. Port 2009 for TLS.
  • Character generator protocol, RFC 864 is enabled in both TCP and UDP. Port 19. Output pattern should follow the proposed example pattern in RFC.
  • Daytime protocol, RFC 867 in both TCP and UDP. Port 13. Port 2013 for TLS.
  • Time protocol, RFC 868 in both TCP and UDP. Port 37.

Configure the firewall to allow this traffic to access the test server.

Example configuration for Debian/Ubuntu Linux

These services are available on many operating systems, and installing them is out of scope of this document. Below is an example of how to install these services into a Debian/Ubuntu based Linux distribution using standard Inet Daemon:

$ sudo apt install inetutils-inetd
$ nano /etc/inetd.conf

Enable following services from /etc/inetd.conf:

#:INTERNAL: Internal services
discard     stream  tcp6    nowait  root    internal
discard     dgram   udp6    wait    root    internal
echo        stream  tcp6    nowait  root    internal
echo        dgram   udp6    wait    root    internal
chargen     stream  tcp6    nowait  root    internal
chargen     dgram   udp6    wait    root    internal
daytime     stream  tcp6    nowait  root    internal
time        stream  tcp6    nowait  root    internal

Testing the connectivity

You can connect to the test server with an NMAP tool like this:

$ nmap -sT -p7,9,13,37,2007,2009,2013 echo.mbedcloudtesting.com

Starting Nmap 7.01 ( https://nmap.org ) at 2019-01-07 16:45 CET
Nmap scan report for echo.mbedcloudtesting.com (52.215.34.155)
Host is up (0.027s latency).
Other addresses for echo.mbedcloudtesting.com (not scanned): 2a05:d018:21f:3800:3164:2a5c:75b3:970b
rDNS record for 52.215.34.155: ec2-52-215-34-155.eu-west-1.compute.amazonaws.com
PORT     STATE SERVICE
7/tcp    open  echo
9/tcp    open  discard
13/tcp   open  daytime
37/tcp   open  time
2007/tcp open  dectalk
2009/tcp open  news
2013/tcp open  raid-am

Nmap done: 1 IP address (1 host up) scanned in 0.10 seconds

$ sudo nmap -sU -p7,9,13,37,2007,2009,2013 echo.mbedcloudtesting.com 

Starting Nmap 7.01 ( https://nmap.org ) at 2019-01-08 15:05 CET
Nmap scan report for echo.mbedcloudtesting.com (52.215.34.155)
Host is up (0.044s latency).
Other addresses for echo.mbedcloudtesting.com (not scanned): 2a05:d018:21f:3800:3164:2a5c:75b3:970b
rDNS record for 52.215.34.155: ec2-52-215-34-155.eu-west-1.compute.amazonaws.com
PORT     STATE         SERVICE
7/udp    open          echo
9/udp    open|filtered discard
13/udp   closed        daytime
37/udp   closed        time
2007/udp closed        raid-am
2009/udp closed        whosockami
2013/udp closed        raid-cd

Nmap done: 1 IP address (1 host up) scanned in 1.78 seconds

Ethernet test environment

Ethernet

The Ethernet test environment consists of devices, an ethernet switch and an optional firewall that allows connecting to the Echo server.

Wi-Fi test environment

Wi-Fi

The Wi-Fi test environment is equivalent to the Ethernet test environment, except that the Wi-Fi test environment has two separate access points or one with dual SSID. Connectivity to echo server is required, but it can be hosted locally, as specified in the Ethernet environment.

Test case priorities

Please refer to the following table for priorities of test cases. Priorities are labeled as MUST and SHOULD. MUST means this is a requirement and therefore mandatory to pass the test. SHOULD means it is recommended to pass the test if the driver implements the feature in question.

Test case Priority
1 UDPSOCKET_OPEN_DESTRUCT MUST
2 UDPSOCKET_OPEN_LIMIT MUST
3 UDPSOCKET_OPEN_TWICE MUST
4 UDPSOCKET_OPEN_CLOSE_REPEAT MUST
5 UDPSOCKET_BIND_PORT SHOULD
6 UDPSOCKET_BIND_PORT_FAIL SHOULD
7 UDPSOCKET_BIND_ADDRESS_PORT SHOULD
8 UDPSOCKET_BIND_ADDRESS_NULL SHOULD
9 UDPSOCKET_BIND_ADDRESS_INVALID SHOULD
10 UDPSOCKET_BIND_WRONG_TYPE SHOULD
11 UDPSOCKET_BIND_ADDRESS SHOULD
12 UDPSOCKET_BIND_UNOPENED SHOULD
13 UDPSOCKET_SENDTO_INVALID MUST
14 UDPSOCKET_SENDTO_REPEAT MUST
15 UDPSOCKET_ECHOTEST MUST
16 UDPSOCKET_ECHOTEST_NONBLOCK MUST
17 UDPSOCKET_RECV_TIMEOUT SHOULD
18 UDPSOCKET_SENDTO_TIMEOUT SHOULD
19 TCPSOCKET_OPEN_DESTRUCT MUST
20 TCPSOCKET_OPEN_LIMIT MUST
21 TCPSOCKET_OPEN_TWICE MUST
22 TCPSOCKET_OPEN_CLOSE_REPEAT MUST
23 TCPSOCKET_BIND_PORT SHOULD
24 TCPSOCKET_BIND_PORT_FAIL SHOULD
25 TCPSOCKET_BIND_ADDRESS_PORT SHOULD
26 TCPSOCKET_BIND_ADDRESS_NULL SHOULD
27 TCPSOCKET_BIND_ADDRESS_INVALID SHOULD
28 TCPSOCKET_BIND_WRONG_TYPE SHOULD
29 TCPSOCKET_BIND_ADDRESS SHOULD
30 TCPSOCKET_BIND_UNOPENED SHOULD
31 TCPSOCKET_CONNECT_INVALID MUST
32 TCPSOCKET_SEND_REPEAT MUST
33 TCPSOCKET_ECHOTEST MUST
34 TCPSOCKET_ECHOTEST_NONBLOCK MUST
35 TCPSOCKET_RECV_TIMEOUT SHOULD
36 TCPSOCKET_SEND_TIMEOUT SHOULD
37 TCPSOCKET_ENDPOINT_CLOSE MUST
38 UDPSOCKET_ECHOTEST_BURST MUST
39 UDPSOCKET_ECHOTEST_BURST_NONBLOCK MUST
40 TCPSOCKET_ECHOTEST_BURST MUST
41 TCPSOCKET_ECHOTEST_BURST_NONBLOCK MUST
42 TCPSOCKET_RECV_100K MUST
43 TCPSOCKET_RECV_100K_NONBLOCK MUST
44 TCPSOCKET_THREAD_PER_SOCKET_SAFETY MUST
45 TCPSOCKET_SETSOCKOPT_KEEPALIVE_VALID SHOULD
46 TLSSOCKET_OPEN_DESTRUCT SHOULD
47 TLSSOCKET_OPEN_LIMIT SHOULD
48 TLSSOCKET_OPEN_TWICE SHOULD
49 TLSSOCKET_CONNECT_INVALID SHOULD
50 TLSSOCKET_HANDSHAKE_INVALID SHOULD
51 TLSSOCKET_SEND_CLOSED SHOULD
52 TLSSOCKET_SEND_UNCONNECTED SHOULD
53 TLSSOCKET_SEND_REPEAT SHOULD
54 TLSSOCKET_SEND_TIMEOUT SHOULD
55 TLSSOCKET_ECHOTEST SHOULD
56 TLSSOCKET_ECHOTEST_NONBLOCK SHOULD
57 TLSSOCKET_ENDPOINT_CLOSE SHOULD
58 TLSSOCKET_NO_CERT SHOULD
59 TLSSOCKET_RECV_TIMEOUT SHOULD
60 TLSSOCKET_SIMULTANEOUS_TEST SHOULD
61 TLSSOCKET_ECHOTEST_BURST SHOULD
62 TLSSOCKET_ECHOTEST_BURST_NONBLOCK SHOULD
63 ASYNCHRONOUS_DNS MUST
64 ASYNCHRONOUS_DNS_CACHE MUST
65 ASYNCHRONOUS_DNS_CANCEL MUST
66 ASYNCHRONOUS_DNS_EXTERNAL_EVENT_QUEUE MUST
67 ASYNCHRONOUS_DNS_INVALID_HOST MUST
68 ASYNCHRONOUS_DNS_NON_ASYNC_AND_ASYNC MUST
69 ASYNCHRONOUS_DNS_SIMULTANEOUS_CACHE MUST
70 ASYNCHRONOUS_DNS_SIMULTANEOUS_REPEAT MUST
71 ASYNCHRONOUS_DNS_SIMULTANEOUS MUST
72 ASYNCHRONOUS_DNS_TIMEOUTS MUST
73 SYNCHRONOUS_DNS MUST
74 SYNCHRONOUS_DNS_CACHE MUST
75 SYNCHRONOUS_DNS_INVALID_HOST MUST
76 SYNCHRONOUS_DNS_MULTIPLE MUST

Building test binaries

For testing the board and driver, test against the Mbed OS master branch to get the most recent, up-to-date test cases and drivers.

To create a build environment:

mbed new network_test
cd network_test
cd mbed-os
git checkout master
cd ..

Also, building socket test cases requires a special macro to enable all tests, so create an mbed_app.json file with the following content at minimum:

{
    "config": {
        "echo-server-addr" : {
            "help" : "IP address of echo server",
            "value" : "\"echo.mbedcloudtesting.com\""
        },
        "echo-server-port" : {
            "help" : "Port of echo server",
            "value" : "7"
        },
        "echo-server-discard-port" : {
            "help" : "Discard port of echo server",
            "value" : "9"
        },
        "echo-server-port-tls" : {
            "help" : "Echo port of echo server",
            "value" : "2007"
        },
        "echo-server-discard-port-tls" : {
            "help" : "Discard port of echo server",
            "value" : "2009"
        }
    }
}

Wi-Fi tests require some more configuration, so for Wi-Fi purposes, the mbed_app.json might look like this:

{
    "config": {
        "wifi-secure-ssid": {
            "help": "WiFi SSID for WPA2 secured network",
            "value": "\"test-network\""
        },
        "wifi-unsecure-ssid": {
            "help": "WiFi SSID for unsecure netwrok",
            "value": "\"unsecure-test-net\""
        },
        "wifi-password": {
            "help": "WiFi Password",
            "value": "\"password\""
        },
        "wifi-secure-protocol": {
            "help": "WiFi security protocol, valid values are WEP, WPA, WPA2, WPA_WPA2",
            "value": "\"WPA2\""
        },
        "wifi-ch-secure": {
            "help": "Channel number of secure SSID",
            "value": 6
        },
        "wifi-ch-unsecure": {
            "help": "Channel number of unsecure SSID",
            "value": 6
        },
        "ap-mac-secure": {
            "help": "BSSID of secure AP in form of AA:BB:CC:DD:EE:FF",
            "value": "\"58:8b:f3:99:f2:9c\""
        },
        "ap-mac-unsecure": {
            "help": "BSSID of unsecure AP in form of \"AA:BB:CC:DD:EE:FF\"",
            "value": "\"58:8b:f3:99:c2:08\""
        },
        "max-scan-size": {
            "help": "How many networks may appear in Wifi scan result",
            "value": 30
        },
        "echo-server-addr" : {
            "help" : "IP address of echo server",
            "value" : "\"echo.mbedcloudtesting.com\""
        },
        "echo-server-port" : {
            "help" : "Port of echo server",
            "value" : "7"
        }
        "echo-server-port-tls" : {
            "help" : "Port of echo server TLS",
            "value" : "2007"
        }
    },
    "target_overrides": {
        "*": {
            "target.network-default-interface-type": "WIFI",
            "nsapi.default-wifi-ssid": "\"WIFI_SSID\"",
            "nsapi.default-wifi-password": "\"WIFI_PASSWORD\"",
            "nsapi.default-wifi-security": "WPA_WPA2"
        }
    }
}

See mbed-os/tools/test_configs folder for examples.

Now build test binaries:

mbed test --compile -t <toolchain> -m <target> -n mbed-os-tests-network-*,mbed-os-tests-netsocket*

Running tests

When device is connected to network, or in case of wireless device near the access point.

mbed test -n mbed-os-tests-network-*,mbed-os-tests-netsocket*

Test cases for Socket class

These test are equal for UDPSocket and TCPSocket but are described here because of identical API and behaviour. Socket class is abstract so it cannot be instantiated, therefore these test cases are implemented using both TCPSocket and UDPSocket. Some of these tests are also implemented for TLSSocket class. In such case certificate has to be set for the Socket before calling open(), unless specified otherwise in the test's description.

SOCKET_OPEN_DESTRUCT

Description:

Call Socket::open() and then destruct the socket

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()
  2. Call Socket::open(stack)
  3. Call "delete" for the object
  4. Repeat 1000 times.

Expected result:

Socket::open() should always return NSAPI_ERROR_OK

SOCKET_OPEN_LIMIT

Description:

Call Socket::open() until it runs out of memory or other internal limit in the stack is reached.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()
  2. Call Socket::open(stack)
  3. repeat until NSAPI_ERROR_NO_MEMORY or NSAPI_ERROR_NO_SOCKET error is returned.
  4. Call "delete" for all previously allocated sockets.
  5. repeat

Expected result:

Should be able to reserve at least 4 sockets. After freeing all sockets, should be able to reserve same number of sockets.

SOCKET_OPEN_TWICE

Description:

Call Socket::open() twice

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()
  2. Call Socket::open(stack)
  3. Call Socket::open(stack)
  4. delete the socket

Expected result:

Socket::open() should first return NSAPI_ERROR_OK and second call NSAPI_ERROR_PARAMETER.

SOCKET_OPEN_CLOSE_REPEAT

Description:

Call Socket::open() followed by Socket::close() and then again Socket::open(). Should allow you to reuse the same object.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()
  2. Call Socket::open(stack)
  3. Call Socket::close(stack)
  4. Call Socket::open(stack)
  5. Call Socket::close(stack)
  6. delete the socket

Expected result:

All Socket::open() and Socket::close() calls should return NSAPI_ERROR_OK.

SOCKET_BIND_PORT

Description:

Call Socket::bind(port)

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()
  2. Call Socket::open(stack)
  3. Call Socket::bind(<any non-used port number>);
  4. destroy socket

Expected result:

All calls return NSAPI_ERROR_OK

SOCKET_BIND_PORT_FAIL

Description:

Call Socket::bind(port) on port number that is already used

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()
  2. Call Socket::open(stack)
  3. Call Socket::bind(<any non-used port number>);
  4. Repeat 1-3 for a new socket.
  5. destroy both sockets

Expected result:

Second Socket::bind() should return NSAPI_ERROR_PARAMETER

SOCKET_BIND_ADDRESS_PORT

Description:

Call Socket::bind(addr, port)

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()
  2. Call Socket::open(stack)
  3. Get address by calling NetworkInterface::get_ip_address();
  4. Call Socket::bind(address, <any non-used port number>);
  5. destroy socket

Expected result:

All calls return NSAPI_ERROR_OK

SOCKET_BIND_ADDRESS_NULL

Description:

Call Socket::bind(NULL, port)

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()
  2. Call Socket::open(stack)
  3. Call Socket::bind(NULL, <any non-used port number>);
  4. destroy socket

Expected result:

Socket::bind() should return NSAPI_ERROR_OK

SOCKET_BIND_ADDRESS_INVALID

Description:

Call Socket::bind(address, port) with and address that is not assigned to us.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()

  2. Call Socket::open(stack)

  3. Check whether device is IPv4 or IPv6 connected.

    1. For IPv4: Call Socket::bind("190.2.3.4", <any non-used port number>);
    2. For IPv6: Call Socket::bind("fe80::ff01", <any non-used port number>);

  4. destroy socket

Expected result:

Socket::bind() should return NSAPI_ERROR_PARAMETER

SOCKET_BIND_ADDRESS_WRONG_TYPE

Description:

Call Socket::bind(SocketAddress) with and address that is not wrong type for the connection.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()

  2. Call Socket::open(stack)

  3. Check whether device is IPv4 or IPv6 connected.

    1. For IPv4: Create SocketAddress("fe80::ff01", <any non-used port number>);
    2. For IPv6: Create SocketAddress("190.2.3.4", <any non-used port number>);

  4. Call Socket::bind(address);

  5. destroy socket

Expected result:

Socket::bind() should return NSAPI_ERROR_PARAMETER

SOCKET_BIND_ADDRESS

Description:

Call Socket::bind(SocketAddress)

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()
  2. Call Socket::open(stack)
  3. Get address by calling NetworkInterface::get_ip_address();
  4. Create a SocketAddress object using this address and any non-used port number.
  5. Call Socket::bind(address);
  6. destroy socket

Expected result:

All calls return NSAPI_ERROR_OK

SOCKET_BIND_UNOPENED

Description:

Call Socket::bind() on socket that has not been opened

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create a object by calling new Socket()
  2. Call Socket::bind(<any non-used port number>);
  3. destroy socket

Expected result:

NSAPI_ERROR_NO_SOCKET

Test cases for UDPSocket class

UDPSOCKET_OPEN_DESTRUCT

Description: Run SOCKET_OPEN_DESTRUCT for UDPSocket

UDPSOCKET_OPEN_LIMIT

Description: Run SOCKET_OPEN_LIMIT for UDPSocket

UDPSOCKET_OPEN_TWICE

Description: Run SOCKET_OPEN_TWICE for UDPSocket

UDPSOCKET_OPEN_CLOSE_REPEAT

Description: Run SOCKET_OPEN_CLOSE_REPEAT for UDPSocket

UDPSOCKET_BIND_PORT

Description: Run SOCKET_BIND_PORT for UDPSocket

UDPSOCKET_BIND_PORT_FAIL

Description: Run SOCKET_BIND_PORT_FAIL for UDPSocket

UDPSOCKET_BIND_ADDRESS_PORT

Description: Run SOCKET_BIND_ADDRESS_PORT for UDPSocket

UDPSOCKET_BIND_ADDRESS_NULL

Description: Run SOCKET_BIND_ADDRESS_NULL for UDPSocket

UDPSOCKET_BIND_ADDRESS_INVALID

Description: Run SOCKET_BIND_ADDRESS_INVALID for UDPSocket

UDPSOCKET_BIND_WRONG_TYPE

Description: Run SOCKET_BIND_WRONG_TYPE for UDPSocket

UDPSOCKET_BIND_ADDRESS

Description: Run SOCKET_BIND_ADDRESS for UDPSocket

UDPSOCKET_BIND_UNOPENED

Description: Run SOCKET_BIND_UNOPENED for UDPSocket

UDPSOCKET_SENDTO_INVALID

Description:

Call UDPSocket::sendto() with invalid parameters.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. UDPSocket is open

Test steps:

  1. Call UDPSocket:sendto( NULL, 9, NULL, 0);
  2. Call UDPSocket:sendto( "", 9, NULL, 0);
  3. Call UDPSocket:sendto( "", 0, NULL, 0);
  4. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 9,NULL, 0);
  5. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 9, "hello", 5);
  6. destroy the socket

Expected result:

All sendto() calls should return some error code except:

  • step 4 should return 0
  • step 5 should return 5

UDPSOCKET_SENDTO_REPEAT

Description:

Repeatedly send small packets.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. UDPSocket is open

Test steps:

  1. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 9, "hello", 5);
  2. repeat 100 times
  3. Fail if NSAPI_ERROR_NO_MEMORY is returned two times in a row, wait 1 second before retry
  4. destroy the socket

Expected result:

All sendto() calls should return 5.

UDPSOCKET_ECHOTEST

Description:

Repeatedly send packets to echo server and read incoming packets back. Verify working of different packet sizes.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. UDPSocket is open

Test steps:

  1. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = loop index>, <loop index>);
  2. Wait for incomming packet. If timeout happens, retry sending&receiving, max 3 times.
  3. Verify incomming content was the same that was sent
  4. Repeat 1200 times
  5. destroy the socket

Expected result:

All sendto() calls should return the packet size. All recvfrom() calls should return the same sized packet that was send with same content. Calculate packet loss rate, maximum tolerated packet loss rate is 30%

UDPSOCKET_ECHOTEST_NONBLOCK

Description:

Repeatedly send packets to echo server and read incoming packets back. Verify working of different packet sizes. Use socket in non-blocking mode

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. UDPSocket is open

Test steps:

  1. Call UDPSocket::set_blocking(false)
  2. Register event handler with UDPSocket::sigio()
  3. Create another thread that constantly waits signal from sigio() handler, when received try UDPSocket::recvfrom()
  4. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = loop index>, <loop index>);
  5. Wait for incomming packet for one second. If nothing received retry, max 3 times.
  6. Verify incomming content was the same that was sent
  7. Repeat 1200 times
  8. destroy the socket

Expected result:

All sendto() calls should return the packet size. All recvfrom() calls should return the same sized packet that was send with same content or NSAPI_ERROR_WOULD_BLOCK.

Calculate packet loss rate, maximum tolerated packet loss rate is 30%

UDPSOCKET_RECV_TIMEOUT

Description:

Test whether timeouts are obeyed in UDPSockets.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Call UDPSocket::set_timeout(100)

  2. Call UDPSocket::sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 100>, 100);

  3. Repeat 5 times

    1. record a time in millisecond precission
    2. Call UDPSocket::recvfrom()
    3. record a time in millisecond precission

  4. repeat testcase 10 times.

Expected result:

Each sendto() calls should return 100.

Within each loop, one recvfrom() may return the received packet size (100). Other calls should return NSAPI_ERROR_WOULD_BLOCK.

When NSAPI_ERROR_WOULD_BLOCK is received, check that time consumed is more that 100 milliseconds but less than 200 milliseconds.

After repeating for 10 times, at least 5 packets must have been received.

UDPSOCKET_SENDTO_TIMEOUT

Description:

Test whether timeouts are obeyed in UDPSockets.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Record time
  2. Call UDPSocket::sendto("echo.mbedcloudtesting.com", 9, <random packet, size = 100>, 100);
  3. Record time
  4. Call UDPSocket::set_timeout(1000)
  5. Call UDPSocket::sendto("echo.mbedcloudtesting.com", 9, <random packet, size = 100>, 100);
  6. Record time

Expected result:

Each sendto() call should return 100.

All sendto() calls should return faster than 100 milliseconds because UDP sending should not block that long.

Test cases for TCPSocket class

TCPSOCKET_OPEN_DESTRUCT

Description: Run SOCKET_OPEN_DESTRUCT for TCPSocket

TCPSOCKET_OPEN_LIMIT

Description: Run SOCKET_OPEN_LIMIT for TCPSocket

TCPSOCKET_OPEN_TWICE

Description: Run SOCKET_OPEN_TWICE for TCPSocket

TCPSOCKET_OPEN_CLOSE_REPEAT

Description: Run SOCKET_OPEN_CLOSE_REPEAT for TCPSocket

TCPSOCKET_BIND_PORT

Description: Run SOCKET_BIND_PORT for TCPSocket

TCPSOCKET_BIND_PORT_FAIL

Description: Run SOCKET_BIND_PORT_FAIL for TCPSocket

TCPSOCKET_BIND_ADDRESS_PORT

Description: Run SOCKET_BIND_ADDRESS_PORT for TCPSocket

TCPSOCKET_BIND_ADDRESS_NULL

Description: Run SOCKET_BIND_ADDRESS_NULL for TCPSocket

TCPSOCKET_BIND_ADDRESS_INVALID

Description: Run SOCKET_BIND_ADDRESS_INVALID for TCPSocket

TCPSOCKET_BIND_WRONG_TYPE

Description: Run SOCKET_BIND_WRONG_TYPE for TCPSocket

TCPSOCKET_BIND_ADDRESS

Description: Run SOCKET_BIND_ADDRESS for TCPSocket

TCPSOCKET_BIND_UNOPENED

Description: Run SOCKET_BIND_UNOPENED for TCPSocket

TCPSOCKET_CONNECT_INVALID

Description:

Call TCPSocket::connect() with invalid parameters.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. TCPSocket is open

Test steps:

  1. Call TCPSocket:connect( NULL, 9);
  2. Call TCPSocket:connect( "", 9);
  3. Call TCPSocket:connect( "", 0);
  4. Call TCPSocket:connect( "echo.mbedcloudtesting.com", 9);
  5. destroy the socket

Expected result:

All connect() calls should return some error code except the number 4 should return NSAPI_ERROR_OK.

TCPSOCKET_SEND_REPEAT

Description:

Repeatedly send small packets.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. TCPSocket is open

Test steps:

  1. Call TCPSocket::connect("echo.mbedcloudtesting.com", 9);
  2. Call TCPSocket::send("hello", 5);
  3. repeat 1000 times
  4. destroy the socket

Expected result:

TCPSocket::connect() should return NSAPI_ERROR_OK

All send() calls should return 5.

TCPSOCKET_ECHOTEST

Description:

Repeatedly send packets to echo server and read incoming packets back. Verify working of different packet sizes.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. TCPSocket is open

Test steps:

  1. Call TCPSocket::connect("echo.mbedcloudtesting.com", 7);

  2. Call TCPSocket::send(<random packet, size = loop index>, <size>);

    1. If less than was returned, size = sent bytes

  3. Call TCPSocket::recv(buffer, <size>);

  4. Verify incomming content was the same that was sent

  5. Repeat 1200 times

  6. destroy the socket

Expected result:

All send() calls should return the packet size or less. All recv() calls should return the same sized packet that was send with same content.

NOTE: This is stream so recv() might return less data than what was requested. In this case you need to keep calling recv() until all data that you have sent is returned.

TCPSOCKET_ECHOTEST_NONBLOCK

Description:

Repeatedly send packets to echo server and read incoming packets back. Verify working of different packet sizes. Use socket in non-blocking mode

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. TCPSocket is open

Test steps:

  1. Call TCPSocket::connect("echo.mbedcloudtesting.com", 7);

  2. Call TCPSocket::set_blocking(false)

  3. Register event handler with TCPSocket::sigio()

  4. Create another thread that constantly waits signal from sigio() handler, when received try TCPSocket::recv(buf+index, <loop index> - index), where index is the amount of data already received.

  5. Call TCPSocket:send(<random packet, size = loop index>, <loop index>);

    1. If less than was returned, try immeadiately sending remaining bytes.
    2. If NSAPI_ERROR_WOULD_BLOCK is returned, wait for sigio() call to happen.

  6. Wait for incomming packet for one second.

  7. Verify incomming content was the same that was sent, set index for receiving thread to zero.

  8. Repeat 1200 times

  9. destroy the socket

Expected result:

All send() calls should return the packet size or less. All recv() calls should return NSAPI_ERROR_WOULD_BLOCK or packet size that is equal or less than what has been sent.

TCPSOCKET_RECV_TIMEOUT

Description:

Test whether timeouts are obeyed in TCPSockets.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. TCPSocket is open

Test steps:

  1. Call TCPSocket::connect("echo.mbedcloudtesting.com", 7);

  2. Call TCPSocket::set_timeout(100);

  3. Call TCPSocket::send(<random packet, size = 100>;, 100);

  4. Repeat 5 times

    1. record a time in millisecond precission
    2. Call TCPSocket::recv()
    3. record a time in millisecond precission

  5. repeat testcase 10 times.

Expected result:

Each send() call should return 100.

Within each loop, one recv() may return the received packet size (100). Other calls should return NSAPI_ERROR_WOULD_BLOCK.

When NSAPI_ERROR_WOULD_BLOCK is received, check that time consumed is more that 100 milliseconds but less than 200 milliseconds.

TCPSOCKET_SEND_TIMEOUT

Description:

Repeatedly send small packets in a given time limit

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. TCPSocket is open

Test steps:

  1. Call TCPSocket:connect("echo.mbedcloudtesting.com", 9);
  2. Call TCPSocket:set_blocking(false);
  3. Call TCPSocket:send("hello", 5);
  4. repeat 10 times
  5. destroy the socket

Expected result:

TCPSocket::connect() should return NSAPI_ERROR_OK

All send() calls should return in less than 800 milliseconds

TCPSOCKET_ENDPOINT_CLOSE

Description:

Test whether we tolerate endpoint closing the connection.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up
  3. TCPSocket is open

Test steps:

  1. Call TCPSocket::connect("echo.mbedcloudtesting.com", 13);
  2. Call TCPSocket::recv(<buffer>, 30);
  3. Repeat until recv() returns 0
  4. Call TCPSocket::close();
  5. delete socket

Expected result: Connect should return NSAPI_ERROR_OK.

First recv() should return more that zero. Something between 10 and 30 bytes (datetime string)

Second recv() should return zero because endpoint closed the connection. (EOF). close() should return NSAPI_ERROR_OK

TCPSOCKET_SETSOCKOPT_KEEPALIVE_VALID

Description:

Test we are able to request setting valid TCP keepalive values

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Call TCPSocket::setsockopt(keepalive, [0,1 or 7200]);
  2. Call TCPSocket::connect("echo.mbedcloudtesting.com", 9);
  3. Call TCPSocket::getsockopt(keepalive);

Postconditions:

  1. Call TCPSocket::close();
  2. delete socket

Expected result:

TCPSocket::getsockopt(keepalive) returns same value as was set with TCPSocket::setsockopt() or NSAPI_ERROR_UNSUPPORTED

Test cases for TLSSocket class

TLSSOCKET_OPEN_DESTRUCT

Description: Run SOCKET_OPEN_DESTRUCT for TLSSocket

TLSSOCKET_OPEN_LIMIT

Description: Run SOCKET_OPEN_LIMIT for TLSSocket

TLSSOCKET_OPEN_TWICE

Description: Run SOCKET_OPEN_TWICE for TLSSocket

TLSSOCKET_CONNECT_INVALID

Description: Run SOCKET_CONNECT_INVALID for TLSSocket

TLSSOCKET_HANDSHAKE_INVALID

Description:

Execute TLS handshake by calling TLSSocket::connect() - server must not match to the certificate used by to os.mbed.com

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create TLSSocket
  2. Call TLSSocket::open()
  3. Call TLSSocket::connect("os.mbed.com", 2009)
  4. Call TLSSocket::close()

Expected result:

TLSSocket::connect must return an error

TLSSOCKET_SEND_CLOSED

Description:

Make a HTTP request to a closed socket

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create TLSSocket
  2. Call TLSSocket::open()
  3. Call TLSSocket::connect("echo.mbedcloudtesting.com", 2007)
  4. Call TLSSocket::close()
  5. Call TLSSocket::send("12345", 5)

Expected result:

TLSSocket::send must return an error

TLSSOCKET_SEND_REPEAT

Description: Run SOCKET_SEND_REPEAT for TLSSOCKET by using port number 2009.

TLSSOCKET_SEND_TIMEOUT

Description: Run SOCKET_SEND_TIMEOUT for TLSSOCKET by using port number 2009.

TLSSOCKET_SEND_UNCONNECTED

Description:

Make a HTTP request to an unconnected socket

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create TLSSocket
  2. Call TLSSocket::open()
  3. Call TLSSocket::send("12345", 5)
  4. Call TLSSocket::connect("echo.mbedcloudtesting.com", 2007)

Expected result:

TLSSocket::send must return an error

TLSSOCKET_ECHOTEST

Description: Run SOCKET_ECHOTEST for TLSSOCKET by using port number 2007.

TLSSOCKET_ECHOTEST_NONBLOCK

Description: Run SOCKET_ECHOTEST_NONBLOCK for TLSSOCKET by using port number 2007.

TLSSOCKET_ENDPOINT_CLOSE

Description: Run SOCKET_ENDPOINT_CLOSE for TLSSOCKET by using port number 2013.

TLSSOCKET_NO_CERT

Description:

Verify that TLS Socket fails to connect without certificate.

Preconditions:

  1. Network interface and stack are initialised
  2. Network connection is up

Test steps:

  1. Create TLSSocket, without adding a default certificate.
  2. Call TLSSocket::open()
  3. Call TLSSocket::connect("echo.mbedcloudtesting.com", 2009)

Expected result:

TLSSocket::connect must return an error if the certificate is not present.

TLSSOCKET_RECV_TIMEOUT

Description:

Run TCPSOCKET_RECV_TIMEOUT for TLSSOCKET by using port number 2007. 

TLSSOCKET_SIMULTANEOUS_TEST

Description:

Simultaneously send packets to echo server on two opened sockets and read incoming packets back. Verify working of two TLS sockets open and operate simultaneously.

Preconditions:

  1. Network interface and stack are initialised

  2. Network connection is up

  3. TLSSockets are open and one additional thread has been created

  4. Both threads get their own socket instance

Test steps:

  1. On main thread:

    1. Call TLSSocket::connect("echo.mbedcloudtesting.com", 2007);

    2. Call TLSSocket::send(<random packet, size = loop index>, <loop index>);

      1. If less than was returned, size = sent bytes

    3. Call TLSSocket::recv(buffer, <size>);

    4. Verify incomming content was the same that was sent

    5. Repeat 100 times

  2. Simultaneously with the earlier step do on the additional thread:

    1. Call TLSSocket::connect("echo.mbedcloudtesting.com", 2007);

    2. Call TLSSocket::send(<random packet, size = loop index>, <loop index>);

      1. If less than was returned, size = sent bytes

    3. Call TLSSocket::recv(buffer, <size>);

    4. Verify incomming content was the same that was sent

    5. Repeat 100 times

  3. Wait for end additional thread

  4. Close and destroy the sockets

Expected result:

All send() calls should return the packet size or less. All recv() calls on main thread should return the same sized packet that was send with same content. All recv() calls on additional thread should return the valid daytime string . 

Performance tests

UDPSOCKET_ECHOTEST_BURST

Description:

Send burst of packets to echo server and read incoming packets back.

Preconditions:

  1. Network interface and stack are initialised.
  2. Network connection is up.
  3. UDPSocket is open.

Test steps:

  1. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 100>, 100);
  2. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 200>, 200);
  3. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 300>, 300);
  4. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 120>, 120);
  5. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 500>, 500);
  6. Wait for incomming packets for five second.
  7. Verify incomming content was the same that was sent. Allow packet reordering.
  8. Repeat 100 times.
  9. Destroy the socket.

Expected result:

All sendto() calls should return the packet size.

All recvfrom() calls should return the same sized packet that was send with same content. Allow packet reordering.

Calculate packet loss rate, maximum tolerated packet loss rate is 30%.

Calculate number of succesfull rounds, it should be higher than 70.

UDPSOCKET_ECHOTEST_BURST_NONBLOCK

Description:

Send burst of packets to echo server and read incoming packets back. Use socket in non-blocking mode.

Preconditions:

  1. Network interface and stack are initialised.
  2. Network connection is up.
  3. UDPSocket is open.

Test steps:

  1. Call UDPSocket::set_blocking(false)
  2. Register event handler with UDPSocket::sigio()
  3. Create another thread that constantly waits signal from sigio() handler, when received try UDPSocket::recvfrom()
  4. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 100>, 100);
  5. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 200>, 200);
  6. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 300>, 300);
  7. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 120>, 120);
  8. Call UDPSocket:sendto("echo.mbedcloudtesting.com", 7, <random packet, size = 500>, 500);
  9. Wait for incomming packets for five second.
  10. Verify incomming content was the same that was sent. Allow packet reordering.
  11. Repeat 100 times.
  12. Destroy the socket.

Expected result:

All sendto() calls should return the packet size.

All recvfrom() calls should return the same sized packet that was send with same content. Allow packet reordering.

Calculate packet loss rate, maximum tolerated packet loss rate is 30%.

Calculate number of succesfull rounds, it should be higher than 70.

TCPSOCKET_ECHOTEST_BURST

Description:

Send burst of packets to echo server and read incoming packets back.

Preconditions:

  1. Network interface and stack are initialised.
  2. Network connection is up.
  3. TCPSocket is open.

Test steps:

  1. Call TCPSocket::connect("echo.mbedcloudtesting.com", 7);
  2. Call TCPSocket::send(<random packet, size = 100>, 100);
  3. Call TCPSocket::send(<random packet, size = 200>, 200);
  4. Call TCPSocket::send(<random packet, size = 300>, 300);
  5. Call TCPSocket::send(<random packet, size = 120>, 120);
  6. Call TCPSocket::send(<random packet, size = 500>, 500);
  7. Call TCPSocket::recv(buf, 1220)
  8. Verify incomming content was the same that was sent.
  9. Repeat 100 times.
  10. Destroy the socket.

Expected result:

All send() calls should return the packet size.

NOTE: This is stream so recv() might return less data than what was requested. In this case you need to keep calling recv() with remaining size until all data that you have sent is returned.

Consecutive calls to recv() should return all the data that has been send. Total amount of returned must match 1220.

TCPSOCKET_ECHOTEST_BURST_NONBLOCK

Description:

Send burst of packets to echo server and read incoming packets back. Use socket in non-blocking mode.

Preconditions:

  1. Network interface and stack are initialised.
  2. Network connection is up.
  3. TCPSocket is open.

Test steps:

  1. Register event handler with TCPSocket::sigio()

  2. Call TCPSocket::connect("echo.mbedcloudtesting.com", 7);

  3. Call TCPSocket::set_blocking(false)

  4. Create another thread that constantly waits signal from sigio() handler, when received try TCPSocket::recv()

  5. For randomly generated packets, sized 100, 200, 300, 120 and 500 do

    1. Call TCPSocket::send(packet, size);
    2. If less than size is sent, repeat with remaining.
    3. If NSAPI_ERROR_WOULD_BLOCK returned, wait for next sigio().

  6. Wait for incomming packets for five second.

  7. Verify incomming content was the same that was sent. Allow recv() to return smaller piezes.

  8. Repeat 100 times.

  9. Destroy the socket.

Expected result:

All send() calls should return NSAPI_ERROR_WOULD_BLOCK or size which is equal or less than requested.

All recv() calls should return value that is less or equal to what have been sent. With consecutive calls, size should match.

When recv() returns NSAPI_ERROR_WOULD_BLOCK wait for next sigio() event. No other error codes allowed.

TCPSOCKET_RECV_100K

Description:

Download 100kB of data

Preconditions:

  1. Network interface and stack are initialised.
  2. Network connection is up.
  3. TCPSocket is open.

Test steps:

  1. Call TCPSocket::connect("echo.mbedcloudtesting.com", 19);
  2. Call TCPSocket::recv(buffer, 100);
  3. Verify input according to known pattern.
  4. Loop until 100kB of data received.
  5. Close socket.

Expected result:

Each recv() call should return equal or less than 100 bytes of data. No errors should be returned.

Measure time taken for receiving, report speed

TCPSOCKET_RECV_100K_NONBLOCK

Description:

Download 100kB of data

Preconditions:

  1. Network interface and stack are initialised.
  2. Network connection is up.
  3. TCPSocket is open.

Test steps:

  1. Call TCPSocket::connect("echo.mbedcloudtesting.com", 19);

  2. Call TCPSocket::set_blocking(false)

  3. Create another thread that constantly waits signal from sigio() handler, when received try TCPSocket::recv()

    1. Call TCPSocket::recv(buffer, 100);
    2. Verify input according to known pattern.

  4. Wait until 100kB of data received.

  5. Close socket.

Expected result:

Each recv() call should return equal or less than 100 bytes of data or NSAPI_ERROR_WOULD_BLOCK in which case thread should wait for another sigio(). No errors should be returned.

Measure time taken for receiving, report speed.

TCPSOCKET_THREAD_PER_SOCKET_SAFETY

Description:

Run two threads which both exercise the underlying stack and driver through a dedicated socket

Preconditions:

  1. Network interface and stack are initialised.
  2. Network connection is up.
  3. 2 TCPSockets are open and one additional thread has been created.
  4. Both threads get their own socket instance.

Test steps:

  1. Call TCPSocket::connect("echo.mbedcloudtesting.com", 7) in both threads - in the main thread executing the test case and on the additional one.

  2. On main thread

    1. For randomly generated packets, sized 1001, 901, 801,...,101,1 do
      1. Call TCPSocket::send(packet, size);
      2. Verify incoming content was the same that was sent. Allow recv() to return smaller piezes.

  3. Simultaneously with the earlier step do on the additional thread

    1. For randomly generated packets, sized 10 do
      1. Call TCPSocket::send(packet, size);
      2. Verify incomming content was the same that was sent. Allow recv() to return smaller piezes.
      3. stop the thread if inconsistensies were found and report it to main thread

  4. Kill the additional thread.

  5. Close and destroy the sockets.

Expected result:

Echo server returns data to both threads and received data matches to send data. The additional thread isn't stopped prematurely.

Test cases for DNS class

ASYNCHRONOUS_DNS

Description:

Verify basic functionality of asynchronous DNS. Call NetworkInterface::gethostbyname_async() with a valid host name and verify result.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname_async() with a valid host name and a callback.
  2. Verify that callback is called with correct parameters.

Expected result:

Callback is called with NSAPI_ERROR_OK and IP address.

ASYNCHRONOUS_DNS_SIMULTANEOUS

Description:

Verify that simultaneous asynchronous DNS queries work correctly. Call NetworkInterface::gethostbyname_async() in a row 6 times with a different host names. Wait for all requests to complete and verify result. Cache shall not contain host names used in asynchronous request.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname_async() in a row 6 times with a different host names. Host names shall not be found from cache.
  2. Verify that last gethostbyname_async() operation is rejected since there is room only for 5 simultaneous operations.
  3. Verify that callback is called with correct parameters 5 times.

Expected result:

Sixth gethostbyname_async() is rejected. Callback is called with NSAPI_ERROR_OK and IP address 5 times.

ASYNCHRONOUS_DNS_SIMULTANEOUS_CACHE

Description:

Verify that the caching of DNS results works correctly with simultaneous asynchronous DNS queries. Call NetworkInterface::gethostbyname_async() in a row 6 times with a different host names. Wait for all requests to complete and verify result. Cache shall contain at least one host name used in asynchronous request. This can be achieved e.g. by running test "Asynchronous DNS simultaneous" before this test and using same host names in this run.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname_async() in a row 6 times with a different host names. At least one host name shall be found from cache.
  2. Verify that callback is called with correct parameters 6 times.

Expected result:

Callback is called with NSAPI_ERROR_OK and IP address 6 times.

ASYNCHRONOUS_DNS_CACHE

Description:

Verify that the caching of DNS results works correctly. Call NetworkInterface::gethostbyname_async() 5 times with the same host name and verify result after each request. For first request, cache shall not contain the host name. Verify that first request completes slower than the requests made after it (where the response is found from cache).

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname_async() with a host name. For first request, host name shall not be found from cache.
  2. Verify that callback is called with correct parameters.
  3. Repeat the sequence 4 times using the same host name.
  4. For each request, calculate how long time it takes for DNS query to complete.

Expected result:

Callback is called with NSAPI_ERROR_OK and IP address 5 times. First request shall complete slower than the requests made after it (where the response is found from cache).

ASYNCHRONOUS_DNS_NON_ASYNC_AND_ASYNC

Description:

Verify that non-asynchronous i.e. blocking DNS queries and asynchronous i.e. non-blocking queries work at the same time. Call NetworkInterface::gethostbyname_async(). Right after that make 6 non-asynchronous NetworkInterface::gethostbyname() calls with different host names.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname_async() with a host name. Host name shall not be found from cache.
  2. Call gethostbyname() 6 times with a different host names (none of the names shall be same as in step 1).
  3. Verify that each gethostbyname() returns success.
  4. Verify that the asynchronous callback is called with correct parameters.

Expected result:

All operations shall return NSAPI_ERROR_OK and IP address.

ASYNCHRONOUS_DNS_CANCEL

Description:

Verify that asynchronous DNS query cancel works correctly. Call NetworkInterface::gethostbyname_async() in a row 6 times with a different host names. Cache shall contain 3 host names used in requests. This can be achieved e.g. by running test "Asynchronous DNS non-asynchronous and asynchronous" before this test and using same host names in this run. For each request that was given an unique id, call cancel. Verify that callback is not called for cancelled requests.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname_async() in a row 6 times with a different host names. Cache shall contain in maximum 3 host names used in requests.
  2. Call gethostbyname_async_cancel() for each request that was given an unique id.
  3. Verify that for cancelled requests, callback is not called.
  4. Verify that for other request, callback is called.

Expected result:

Callback shall be called only for requests that were not cancelled.

ASYNCHRONOUS_DNS_EXTERNAL_EVENT_QUEUE

Description:

Verify that providing an external event queue works correctly. Define a thread and an event queue running on it. Define a DNS call in callback function that uses the event queue (call_in_callback_cb_t). Enable external event queue. Call NetworkInterface::gethostbyname_async() in a row 6 times with a different host names.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Define a thread and an event queue running on it.
  2. Define a DNS call in callback function that uses the event queue (call_in_callback_cb_t).
  3. Start thread and event queue.
  4. Set DNS callback function using the nsapi_dns_call_in_set() call.
  5. Call gethostbyname_async() in a row 6 times with a different host names. Host names shall not be found from cache.
  6. Verify that last gethostbyname_async() operation is rejected since there is room only for 5 simultaneous operations.
  7. Verify that callback is called with correct parameters 5 times.
  8. Restore default DNS callback function using the nsapi_dns_call_in_set() call.

Expected result:

Sixth gethostbyname_async() is rejected. Callback is called with NSAPI_ERROR_OK and IP address 5 times.

ASYNCHRONOUS_DNS_INVALID_HOST

Description:

Verify that DNS failure error is provided for invalid hosts. Call NetworkInterface::gethostbyname_async() in a row 6 times with a different host names. First, third and fifth host name shall be invalid.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname_async() in a row 6 times with a different host names. Host names shall not be found from cache. First, third and fifth host name shall be invalid.
  2. Verify that last gethostbyname_async() operation is rejected since there is room only for 5 simultaneous operations.
  3. Verify that callback is called with correct parameters 5 times.

Expected result:

Sixth gethostbyname_async() is rejected. Callback is called with NSAPI_ERROR_DNS_FAILURE for first, third and fifth host name. Callback is called with NSAPI_ERROR_OK and IP address for second and fourth host name.

ASYNCHRONOUS_DNS_TIMEOUTS

Description:

Test DNS timeouts using an external event queue that is modified to timeout the events faster that standard event queue. In this test event queue shall not delay events, instead it handles those immediately. Call NetworkInterface::gethostbyname_async() in a row 6 times with a different host names. All or some of the request shall timeout and timeout return value is returned.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Define a thread and an event queue running on it.
  2. Define a DNS call in callback function that uses the event queue (call_in_callback_cb_t). Callback function shall not delay callbacks; instead it shall handle those immediately.
  3. Start thread and event queue.
  4. Set DNS callback function using the nsapi_dns_call_in_set() call.
  5. Call gethostbyname_async() in a row 6 times with a different host names. Host names shall not be found from cache.
  6. Verify that last gethostbyname_async() operation is rejected since there is room only for 5 simultaneous operations.
  7. Verify that callback is called with correct parameters 5 times.

Expected result:

Sixth gethostbyname_async() is rejected. At least for one operation, callback is called with NSAPI_ERROR_TIMEOUT value.

ASYNCHRONOUS_DNS_SIMULTANEOUS_REPEAT

Description:

Verify that simultaneous asynchronous DNS queries work correctly when repeated in sequence. Call NetworkInterface::gethostbyname_async() in a row 5 times with a different host names. Wait for all requests to complete and verify result. Repeat the procedure 100 times.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname_async() in a row 5 times with a different host names.
  2. Verify that callback is called with correct parameters 5 times for first operation.
  3. Repeat 100 times steps 1 to 2.

Expected result:

Callback is called with NSAPI_ERROR_OK and IP address 5 times for every repeat.

SYNCHRONOUS_DNS

Description:

Verify basic functionality of synchronous DNS. Call NetworkInterface::gethostbyname() with a valid host name and verify result.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname() with a valid host name.
  2. Verify that address was resolved and return value was valid.

Expected result:

Return value is NSAPI_ERROR_OK and IP address is obtained from the function call.

SYNCHRONOUS_DNS_MULTIPLE

Description:

Verify basic functionality of synchronous DNS. Call NetworkInterface::gethostbyname() with a list of 6 host names and verify result.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname() with a list of 6 host names
  2. Verify that each of the addresses was resolved and return value was valid.

Expected result:

Return value is NSAPI_ERROR_OK and IP addresses are obtained from the function call.

SYNCHRONOUS_DNS_CACHE

Description:

Verify that the caching of DNS results works correctly. Call NetworkInterface::gethostbyname() 5 times with the same host name and verify result after each request. For first request, cache shall not contain the host name. Verify that first request completes slower than the requests made after it (where the response is found from cache).

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname() with a host name. For the first request, host name shall not be found from cache.
  2. Verify that address was resolved and return value was valid.
  3. Repeat the sequence 4 times using the same host name.
  4. For each request, calculate how long time it takes for DNS query to complete.

Expected result:

Return value is NSAPI_ERROR_OK and IP address is obtained from the function call 5 times. First request shall complete slower than the requests made after it (where the response is found from cache).

SYNCHRONOUS_DNS_INVALID_HOST

Description:

Verify that DNS failure error is provided for invalid hosts. Call NetworkInterface::gethostbyname() in a row 6 times with a different host names. First, third and fifth host name shall be invalid.

Preconditions:

  1. Network interface is initialised.
  2. Network connection is up.

Test steps:

  1. Call gethostbyname() in a row 6 times with a different host names. Host names shall not be found from cache. First, third and fifth host name shall be invalid.
  2. Verify that return value was valid and for valid hostnames the address was resolved 6 times.

Expected result:

Return value is NSAPI_ERROR_DNS_FAILURE for first, third and fifth host name. Return value is NSAPI_ERROR_OK and IP address is obtained for second and fourth host name.

Subset for driver test

For physical layer driver (emac, PPP):

  • TCPSOCKET_ECHOTEST
  • TCPSOCKET_ECHOTEST_BURST
  • TCPSOCKET_ECHOTEST_BURST_NONBLOCK
  • TCPSOCKET_ECHOTEST_NONBLOCK
  • TCPSOCKET_RECV_100K
  • TCPSOCKET_RECV_100K_NONBLOCK
  • TCPSOCKET_RECV_TIMEOUT
  • TCPSOCKET_SEND_REPEAT
  • UDPSOCKET_BIND_SENDTO
  • UDPSOCKET_ECHOTEST
  • UDPSOCKET_ECHOTEST_NONBLOCK
  • UDPSOCKET_RECV_TIMEOUT
  • UDPSOCKET_SENDTO_INVALID
  • UDPSOCKET_SENDTO_REPEAT
  • UDPSOCKET_SENDTO_TIMEOUT

For socket layer driver (AT-driven, external IP stack):

All Socket, UDPSocket, TCPSocket and TLSSocket testcases.