flexnbd-c/tests/acceptance/fakes/source/write_out_of_range.rb

#!/usr/bin/env ruby
# Connect, read the hello then make a write request with an impossible
# (from,len) pair.  We expect an error response, and not to be
# disconnected.
#
# We then expect to be able to issue a successful write: the destination
# has to flush the data in the socket.

require 'flexnbd/fake_source'
include FlexNBD

addr, port = *ARGV

client = FakeSource.new(addr, port, 'Timed out connecting')
hello = client.read_hello
client.write_write_request(hello[:size] + 1, 32, 'myhandle')
client.write_data('1' * 32)
response = client.read_response

raise 'Not an error' if response[:error] == 0
raise 'Wrong handle' unless response[:handle] == 'myhandle'

client.write_write_request(0, 32)
client.write_data('2' * 32)
success_response = client.read_response

raise 'Second write failed' unless success_response[:error] == 0

client.close
exit(0)