linux: add ipv6 support for inet_diag

inet_diag already supports AF_INET6.

1 files changed, 161 insertions, 0 deletions

diff --git a/test/test_linux_ipv6.rb b/test/test_linux_ipv6.rb
new file mode 100644
index 0000000..e2886ac
--- /dev/null
+++ b/test/test_linux_ipv6.rb
@@ -0,0 +1,161 @@
+# -*- encoding: binary -*-
+require 'test/unit'
+require 'tempfile'
+require 'raindrops'
+require 'socket'
+require 'pp'
+$stderr.sync = $stdout.sync = true
+
+begin
+  tmp = TCPServer.new(ENV["TEST_HOST6"] || '::1', 0)
+  ipv6_enabled = true
+rescue => e
+  warn "skipping IPv6 tests, host does not seem to be IPv6 enabled:"
+  warn "  #{e.class}: #{e}"
+  ipv6_enabled = false
+end
+
+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
+
+    c = 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
+
+    sc = 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
+
+    c1 = 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
+
+    c2 = 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
+
+    c3 = 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
+
+    sc2 = 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
+
+  # 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
+        socks = (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
+        socks = (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
+
+    uno_mas = 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 { |(pid,status)| assert status.success?, status.inspect }
+  end if ENV["STRESS"].to_i != 0
+end if RUBY_PLATFORM =~ /linux/ && ipv6_enabled