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# -*- encoding: binary -*-
require 'test/unit'
require 'tempfile'
require 'raindrops'
require 'socket'
require 'pp'
require "./test/ipv6_enabled"
$stderr.sync = $stdout.sync = true

class TestLinuxIPv6 < Test::Unit::TestCase
  include Raindrops::Linux

  TEST_ADDR = ENV["TEST_HOST6"] || "::1"

  def test_tcp
    s = TCPServer.new(TEST_ADDR, 0)
    port = s.addr[1]
    addr = "[#{TEST_ADDR}]:#{port}"
    addrs = [ addr ]
    stats = tcp_listener_stats(addrs)
    assert_equal 1, stats.size
    assert_equal 0, stats[addr].queued
    assert_equal 0, stats[addr].active

    @to_close << TCPSocket.new(TEST_ADDR, port)
    stats = tcp_listener_stats(addrs)
    assert_equal 1, stats.size
    assert_equal 1, stats[addr].queued
    assert_equal 0, stats[addr].active

    @to_close << s.accept
    stats = tcp_listener_stats(addrs)
    assert_equal 1, stats.size
    assert_equal 0, stats[addr].queued
    assert_equal 1, stats[addr].active
  end

  def test_tcp_multi
    s1 = TCPServer.new(TEST_ADDR, 0)
    s2 = TCPServer.new(TEST_ADDR, 0)
    port1, port2 = s1.addr[1], s2.addr[1]
    addr1, addr2 = "[#{TEST_ADDR}]:#{port1}", "[#{TEST_ADDR}]:#{port2}"
    addrs = [ addr1, addr2 ]
    stats = tcp_listener_stats(addrs)
    assert_equal 2, stats.size
    assert_equal 0, stats[addr1].queued
    assert_equal 0, stats[addr1].active
    assert_equal 0, stats[addr2].queued
    assert_equal 0, stats[addr2].active

    @to_close << TCPSocket.new(TEST_ADDR, port1)
    stats = tcp_listener_stats(addrs)
    assert_equal 2, stats.size
    assert_equal 1, stats[addr1].queued
    assert_equal 0, stats[addr1].active
    assert_equal 0, stats[addr2].queued
    assert_equal 0, stats[addr2].active

    sc1 = s1.accept
    stats = tcp_listener_stats(addrs)
    assert_equal 2, stats.size
    assert_equal 0, stats[addr1].queued
    assert_equal 1, stats[addr1].active
    assert_equal 0, stats[addr2].queued
    assert_equal 0, stats[addr2].active

    @to_close << TCPSocket.new(TEST_ADDR, port2)
    stats = tcp_listener_stats(addrs)
    assert_equal 2, stats.size
    assert_equal 0, stats[addr1].queued
    assert_equal 1, stats[addr1].active
    assert_equal 1, stats[addr2].queued
    assert_equal 0, stats[addr2].active

    @to_close << TCPSocket.new(TEST_ADDR, port2)
    stats = tcp_listener_stats(addrs)
    assert_equal 2, stats.size
    assert_equal 0, stats[addr1].queued
    assert_equal 1, stats[addr1].active
    assert_equal 2, stats[addr2].queued
    assert_equal 0, stats[addr2].active

    @to_close << s2.accept
    stats = tcp_listener_stats(addrs)
    assert_equal 2, stats.size
    assert_equal 0, stats[addr1].queued
    assert_equal 1, stats[addr1].active
    assert_equal 1, stats[addr2].queued
    assert_equal 1, stats[addr2].active

    sc1.close
    stats = tcp_listener_stats(addrs)
    assert_equal 0, stats[addr1].queued
    assert_equal 0, stats[addr1].active
    assert_equal 1, stats[addr2].queued
    assert_equal 1, stats[addr2].active
  end

  def test_invalid_addresses
    assert_raises(ArgumentError) { tcp_listener_stats(%w([1:::5)) }
    assert_raises(ArgumentError) { tcp_listener_stats(%w([1:::]5)) }
  end

  # tries to overflow buffers
  def test_tcp_stress_test
    nr_proc = 32
    nr_sock = 500
    s = TCPServer.new(TEST_ADDR, 0)
    port = s.addr[1]
    addr = "[#{TEST_ADDR}]:#{port}"
    addrs = [ addr ]
    rda, wra = IO.pipe
    rdb, wrb = IO.pipe

    nr_proc.times do
      fork do
        rda.close
        wrb.close
        @to_close.concat((1..nr_sock).map { s.accept })
        wra.syswrite('.')
        wra.close
        rdb.sysread(1) # wait for parent to nuke us
      end
    end

    nr_proc.times do
      fork do
        rda.close
        wrb.close
        @to_close.concat((1..nr_sock).map { TCPSocket.new(TEST_ADDR, port) })
        wra.syswrite('.')
        wra.close
        rdb.sysread(1) # wait for parent to nuke us
      end
    end

    assert_equal('.' * (nr_proc * 2), rda.read(nr_proc * 2))

    rda.close
    stats = tcp_listener_stats(addrs)
    expect = { addr => Raindrops::ListenStats[nr_sock * nr_proc, 0] }
    assert_equal expect, stats

    @to_close << TCPSocket.new(TEST_ADDR, port)
    stats = tcp_listener_stats(addrs)
    expect = { addr => Raindrops::ListenStats[nr_sock * nr_proc, 1] }
    assert_equal expect, stats

    if ENV["BENCHMARK"].to_i != 0
      require 'benchmark'
      puts(Benchmark.measure{1000.times { tcp_listener_stats(addrs) }})
    end

    wrb.syswrite('.' * (nr_proc * 2)) # broadcast a wakeup
    statuses = Process.waitall
    statuses.each { |(_,status)| assert status.success?, status.inspect }
  end if ENV["STRESS"].to_i != 0
end if RUBY_PLATFORM =~ /linux/ && ipv6_enabled?
debug log:

solving ec08f28 ...
found ec08f28 in https://yhbt.net/raindrops.git

raindrops RubyGem user+dev discussion/patches/pulls/bugs/help

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