Now it is enough to add:
"macros": [
"MBED_GREENTEA_TEST_XXXSOCKET_TIMEOUT_S=20"
],
to mbed_app.json, where XXX is on of {DNS, TLS, UDP, TCP}.
Also network-* tests are now configurable: network-interface, network-wifi, network-emac with a similar macro.
Added smarter rounding of times in recv_timeout and increased the delta by one, to allow "off-by-one" errors.
Reverted commit 88eea6a, reducing TESTS_TIMEOUT back to 480.
Introduced a 100ms timeout for waiting on asynchronous DNS resolution.
Improved error handling on disconnects.
Test is giving problems in some networks. Could be that DNS server
is regarding repeated DNS enquiries on the test to be caused by
malfunctioning device.