connect failure scenarios

tests/fakes/dest/close_after_hello.rb

@@ -0,0 +1,47 @@
+#!/usr/bin/env ruby
+
+# Wait for a sender connection, send a correct hello, then disconnect.
+# Simulate a server which crashes after sending the hello.  We then
+# reopen the server socket to check that the sender retries: since the
+# command-line has gone away, and can't feed an error back to the
+# user, we have to keep trying.
+
+addr, port = *ARGV
+
+require 'socket'
+require 'timeout'
+
+sock = TCPServer.new( addr, port )
+client_sock = nil
+
+begin
+  Timeout.timeout(2) do
+    client_sock = sock.accept
+  end
+rescue Timeout::Error
+  $stderr.puts "Timed out waiting for a connection"
+  exit 1
+end
+
+
+client_sock.write( "NBDMAGIC" )
+client_sock.write( "\x00\x00\x42\x02\x81\x86\x12\x53" )
+client_sock.write( "\x00\x00\x00\x00\x00\x00\x10\x00" )
+client_sock.write( "\x00" * 128 )
+
+client_sock.close
+
+new_sock = nil
+begin
+  Timeout.timeout(60) do
+    new_sock = sock.accept
+  end
+rescue Timeout::Error
+  $stderr.puts "Timed out waiting for a reconnection"
+  exit 1
+end
+
+new_sock.close
+sock.close
+
+exit 0

tests/fakes/dest/hang_after_connect.rb

@@ -0,0 +1,34 @@
+#!/usr/bin/env ruby
+
+# Will open a server, accept a single connection, then sleep for 5
+# seconds.  After that time, the client should have disconnected,
+# which we can can't effectively check.
+#
+# This allows the test runner to check that the command-line sees the
+# right error message after the timeout time.
+
+require 'socket'
+require 'timeout'
+require 'flexnbd/constants'
+
+addr, port = *ARGV
+
+serve_sock = TCPServer.new( addr, port )
+client_sock = nil
+
+begin
+  # A failure here means a more serious issue with flexnbd
+  Timeout.timeout( 2 ) do
+    client_sock = serve_sock.accept
+  end
+rescue Timeout::Error
+  $stderr.puts "Client didn't make connection"
+  exit 1
+end
+
+# Sleep for one second past the timeout (a bit of slop in case ruby
+# doesn't launch things quickly)
+sleep(FlexNBD::MS_HELLO_TIME_SECS + 1)
+
+client_sock.close  if client_sock
+serve_sock.close

tests/fakes/dest/hello_wrong_magic.rb

@@ -0,0 +1,46 @@
+#!/usr/bin/env ruby
+
+# Simulate a destination which sends the wrong magic.
+# We expect the sender to disconnect and reconnect.
+
+addr, port = *ARGV
+
+require 'socket'
+require 'timeout'
+require 'flexnbd/constants'
+
+sock = TCPServer.new( addr, port )
+client_sock = nil
+
+begin
+  Timeout.timeout(2) do
+    client_sock = sock.accept
+  end
+rescue Timeout::Error
+  $stderr.puts "Timed out waiting for a connection"
+  exit 1
+end
+
+
+t = Thread.new do
+  begin
+    Timeout.timeout(FlexNBD::MS_RETRY_DELAY_SECS + 1) do
+      client_sock2 = sock.accept
+    end
+  rescue Timeout::Error
+    $stderr.puts "Timed out waiting for a reconnection"
+    exit 1
+  end
+end
+
+client_sock.write( "NBDMAGIC" )
+# We're off in the last byte, should be \x53
+client_sock.write( "\x00\x00\x42\x02\x81\x86\x12\x52" )
+# 4096 is the right size; this is defined in nbd_scenarios
+client_sock.write( "\x00\x00\x00\x00\x00\x00\x10\x00" )
+client_sock.write( "\x00" * 128 )
+
+
+t.join
+
+exit 0

tests/fakes/dest/hello_wrong_size.rb

@@ -0,0 +1,44 @@
+#!/usr/bin/env ruby
+
+# Simulate a server which has a disc of the wrong size attached: send
+# a valid NBD hello with a random size, then check that we have see an
+# EOF on read.
+
+addr, port = *ARGV
+
+require 'socket'
+require 'timeout'
+require 'flexnbd/constants'
+
+sock = TCPServer.new( addr, port )
+client_sock = nil
+
+begin
+  Timeout.timeout(2) do
+    client_sock = sock.accept
+  end
+rescue Timeout::Error
+  $stderr.puts "Timed out waiting for a connection"
+  exit 1
+end
+
+t = Thread.new do
+  begin
+    Timeout.timeout(FlexNBD::MS_RETRY_DELAY_SECS + 1) do
+      client_sock2 = sock.accept
+    end
+  rescue Timeout::Error
+    $stderr.puts "Timed out waiting for a reconnection"
+    exit 1
+  end
+end
+
+client_sock.write( "NBDMAGIC" )
+client_sock.write( "\x00\x00\x42\x02\x81\x86\x12\x53" )
+8.times do client_sock.write rand(256).chr end
+client_sock.write( "\x00" * 128 )
+
+
+t.join
+
+exit 0

tests/fakes/dest/reject_acl.rb

@@ -0,0 +1,22 @@
+#!/usr/bin/env ruby
+
+# Accept a connection, then immediately close it.  This simulates an ACL rejection.
+
+addr, port = *ARGV
+require 'socket'
+require 'timeout'
+
+serve_sock = TCPServer.open( addr, port )
+
+begin
+  Timeout.timeout( 2 ) do
+    serve_sock.accept.close
+  end
+rescue Timeout::Error
+  $stderr.puts "Timed out waiting for a connection"
+  exit 1
+end
+
+serve_sock.close
+
+exit(0)