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socket_spec.cr
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socket_spec.cr
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require "spec"
require "socket"
describe Socket do
# Tests from libc-test:
# http://repo.or.cz/libc-test.git/blob/master:/src/functional/inet_pton.c
it ".ip?" do
# dotted-decimal notation
Socket.ip?("0.0.0.0").should be_true
Socket.ip?("127.0.0.1").should be_true
Socket.ip?("10.0.128.31").should be_true
Socket.ip?("255.255.255.255").should be_true
# numbers-and-dots notation, but not dotted-decimal
# Socket.ip?("1.2.03.4").should be_false # fails on darwin
Socket.ip?("1.2.0x33.4").should be_false
Socket.ip?("1.2.0XAB.4").should be_false
Socket.ip?("1.2.0xabcd").should be_false
Socket.ip?("1.0xabcdef").should be_false
Socket.ip?("00377.0x0ff.65534").should be_false
# invalid
Socket.ip?(".1.2.3").should be_false
Socket.ip?("1..2.3").should be_false
Socket.ip?("1.2.3.").should be_false
Socket.ip?("1.2.3.4.5").should be_false
Socket.ip?("1.2.3.a").should be_false
Socket.ip?("1.256.2.3").should be_false
Socket.ip?("1.2.4294967296.3").should be_false
Socket.ip?("1.2.-4294967295.3").should be_false
Socket.ip?("1.2. 3.4").should be_false
# ipv6
Socket.ip?(":").should be_false
Socket.ip?("::").should be_true
Socket.ip?("::1").should be_true
Socket.ip?(":::").should be_false
Socket.ip?(":192.168.1.1").should be_false
Socket.ip?("::192.168.1.1").should be_true
Socket.ip?("0:0:0:0:0:0:192.168.1.1").should be_true
Socket.ip?("0:0::0:0:0:192.168.1.1").should be_true
# Socket.ip?("::012.34.56.78").should be_false # fails on darwin
Socket.ip?(":ffff:192.168.1.1").should be_false
Socket.ip?("::ffff:192.168.1.1").should be_true
Socket.ip?(".192.168.1.1").should be_false
Socket.ip?(":.192.168.1.1").should be_false
Socket.ip?("a:0b:00c:000d:E:F::").should be_true
# Socket.ip?("a:0b:00c:000d:0000e:f::").should be_false # fails on GNU libc
Socket.ip?("1:2:3:4:5:6::").should be_true
Socket.ip?("1:2:3:4:5:6:7::").should be_true
Socket.ip?("1:2:3:4:5:6:7:8::").should be_false
Socket.ip?("1:2:3:4:5:6:7::9").should be_false
Socket.ip?("::1:2:3:4:5:6").should be_true
Socket.ip?("::1:2:3:4:5:6:7").should be_true
Socket.ip?("::1:2:3:4:5:6:7:8").should be_false
Socket.ip?("a:b::c:d:e:f").should be_true
Socket.ip?("ffff:c0a8:5e4").should be_false
Socket.ip?(":ffff:c0a8:5e4").should be_false
Socket.ip?("0:0:0:0:0:ffff:c0a8:5e4").should be_true
Socket.ip?("0:0:0:0:ffff:c0a8:5e4").should be_false
Socket.ip?("0::ffff:c0a8:5e4").should be_true
Socket.ip?("::0::ffff:c0a8:5e4").should be_false
Socket.ip?("c0a8").should be_false
end
describe ".unix" do
it "creates a unix socket" do
sock = Socket.unix
sock.should be_a(Socket)
sock.family.should eq(Socket::Family::UNIX)
sock.type.should eq(Socket::Type::STREAM)
sock = Socket.unix(Socket::Type::DGRAM)
sock.type.should eq(Socket::Type::DGRAM)
end
end
end
describe Socket::Addrinfo do
describe ".resolve" do
it "returns an array" do
addrinfos = Socket::Addrinfo.resolve("localhost", 80, type: Socket::Type::STREAM)
typeof(addrinfos).should eq(Array(Socket::Addrinfo))
addrinfos.size.should_not eq(0)
end
it "yields each result" do
Socket::Addrinfo.resolve("localhost", 80, type: Socket::Type::DGRAM) do |addrinfo|
typeof(addrinfo).should eq(Socket::Addrinfo)
end
end
it "eventually raises returned error" do
expect_raises(Socket::Error) do |addrinfo|
Socket::Addrinfo.resolve("localhost", 80, type: Socket::Type::DGRAM) do |addrinfo|
Socket::Error.new("please fail")
end
end
end
end
describe ".tcp" do
it "returns an array" do
addrinfos = Socket::Addrinfo.tcp("localhost", 80)
typeof(addrinfos).should eq(Array(Socket::Addrinfo))
addrinfos.size.should_not eq(0)
end
it "yields each result" do
Socket::Addrinfo.tcp("localhost", 80) do |addrinfo|
typeof(addrinfo).should eq(Socket::Addrinfo)
end
end
end
describe ".udp" do
it "returns an array" do
addrinfos = Socket::Addrinfo.udp("localhost", 80)
typeof(addrinfos).should eq(Array(Socket::Addrinfo))
addrinfos.size.should_not eq(0)
end
it "yields each result" do
Socket::Addrinfo.udp("localhost", 80) do |addrinfo|
typeof(addrinfo).should eq(Socket::Addrinfo)
end
end
end
describe "#ip_address" do
it do
addrinfos = Socket::Addrinfo.udp("localhost", 80)
typeof(addrinfos.first.ip_address).should eq(Socket::IPAddress)
end
end
end
describe Socket::IPAddress do
it "transforms an IPv4 address into a C struct and back" do
addr1 = Socket::IPAddress.new("127.0.0.1", 8080)
addr2 = Socket::IPAddress.from(addr1.to_unsafe, addr1.size)
addr2.family.should eq(addr1.family)
addr2.port.should eq(addr1.port)
typeof(addr2.address).should eq(String)
addr2.address.should eq(addr1.address)
end
it "transforms an IPv6 address into a C struct and back" do
addr1 = Socket::IPAddress.new("2001:db8:8714:3a90::12", 8080)
addr2 = Socket::IPAddress.from(addr1.to_unsafe, addr1.size)
addr2.family.should eq(addr1.family)
addr2.port.should eq(addr1.port)
typeof(addr2.address).should eq(String)
addr2.address.should eq(addr1.address)
end
it "won't resolve domains" do
expect_raises(Socket::Error, /Invalid IP address/) do
Socket::IPAddress.new("localhost", 1234)
end
end
it "to_s" do
Socket::IPAddress.new("127.0.0.1", 80).to_s.should eq("127.0.0.1:80")
Socket::IPAddress.new("2001:db8:8714:3a90::12", 443).to_s.should eq("[2001:db8:8714:3a90::12]:443")
end
end
describe Socket::UNIXAddress do
it "transforms into a C struct and back" do
addr1 = Socket::UNIXAddress.new("/tmp/service.sock")
addr2 = Socket::UNIXAddress.from(addr1.to_unsafe, addr1.size)
addr2.family.should eq(addr1.family)
addr2.path.should eq(addr1.path)
addr2.to_s.should eq("/tmp/service.sock")
end
it "raises when path is too long" do
path = "/tmp/crystal-test-too-long-unix-socket-#{("a" * 2048)}.sock"
expect_raises(ArgumentError, "Path size exceeds the maximum size") { Socket::UNIXAddress.new(path) }
end
it "to_s" do
Socket::UNIXAddress.new("some_path").to_s.should eq("some_path")
end
end
describe UNIXServer do
it "raises when path is too long" do
path = "/tmp/crystal-test-too-long-unix-socket-#{("a" * 2048)}.sock"
expect_raises(ArgumentError, "Path size exceeds the maximum size") { UNIXServer.new(path) }
File.exists?(path).should be_false
end
it "creates the socket file" do
path = "/tmp/crystal-test-unix-sock"
UNIXServer.open(path) do
File.exists?(path).should be_true
end
File.exists?(path).should be_false
end
it "deletes socket file on close" do
path = "/tmp/crystal-test-unix-sock"
begin
server = UNIXServer.new(path)
server.close
File.exists?(path).should be_false
rescue
File.delete(path) if File.exists?(path)
end
end
it "raises when socket file already exists" do
path = "/tmp/crystal-test-unix-sock"
server = UNIXServer.new(path)
begin
expect_raises(Errno) { UNIXServer.new(path) }
ensure
server.close
end
end
it "won't delete existing file on bind failure" do
path = "/tmp/crystal-test-unix.sock"
File.write(path, "")
File.exists?(path).should be_true
begin
expect_raises Errno, /(already|Address) in use/ do
UNIXServer.new(path)
end
File.exists?(path).should be_true
ensure
File.delete(path) if File.exists?(path)
end
end
describe "accept" do
it "returns the client UNIXSocket" do
UNIXServer.open("/tmp/crystal-test-unix-sock") do |server|
UNIXSocket.open("/tmp/crystal-test-unix-sock") do |_|
client = server.accept
client.should be_a(UNIXSocket)
client.close
end
end
end
it "raises when server is closed" do
server = UNIXServer.new("/tmp/crystal-test-unix-sock")
exception = nil
spawn do
begin
server.accept
rescue ex
exception = ex
end
end
server.close
until exception
Fiber.yield
end
exception.should be_a(IO::Error)
exception.try(&.message).should eq("Closed stream")
end
end
describe "accept?" do
it "returns the client UNIXSocket" do
UNIXServer.open("/tmp/crystal-test-unix-sock") do |server|
UNIXSocket.open("/tmp/crystal-test-unix-sock") do |_|
client = server.accept?.not_nil!
client.should be_a(UNIXSocket)
client.close
end
end
end
it "returns nil when server is closed" do
server = UNIXServer.new("/tmp/crystal-test-unix-sock")
ret = :initial
spawn { ret = server.accept? }
server.close
while ret == :initial
Fiber.yield
end
ret.should be_nil
end
end
end
describe UNIXSocket do
it "raises when path is too long" do
path = "/tmp/crystal-test-too-long-unix-socket-#{("a" * 2048)}.sock"
expect_raises(ArgumentError, "Path size exceeds the maximum size") { UNIXSocket.new(path) }
File.exists?(path).should be_false
end
it "sends and receives messages" do
path = "/tmp/crystal-test-unix-sock"
UNIXServer.open(path) do |server|
server.local_address.family.should eq(Socket::Family::UNIX)
server.local_address.path.should eq(path)
UNIXSocket.open(path) do |client|
client.local_address.family.should eq(Socket::Family::UNIX)
client.local_address.path.should eq(path)
server.accept do |sock|
sock.local_address.family.should eq(Socket::Family::UNIX)
sock.local_address.path.should eq("")
sock.remote_address.family.should eq(Socket::Family::UNIX)
sock.remote_address.path.should eq("")
client << "ping"
sock.gets(4).should eq("ping")
sock << "pong"
client.gets(4).should eq("pong")
end
end
end
end
it "sync flag after accept" do
path = "/tmp/crystal-test-unix-sock"
UNIXServer.open(path) do |server|
UNIXSocket.open(path) do |client|
server.accept do |sock|
sock.sync?.should eq(server.sync?)
end
end
server.sync = !server.sync?
UNIXSocket.open(path) do |client|
server.accept do |sock|
sock.sync?.should eq(server.sync?)
end
end
end
end
it "creates a pair of sockets" do
UNIXSocket.pair do |left, right|
left.local_address.family.should eq(Socket::Family::UNIX)
left.local_address.path.should eq("")
left << "ping"
right.gets(4).should eq("ping")
right << "pong"
left.gets(4).should eq("pong")
end
end
it "tests read and write timeouts" do
UNIXSocket.pair do |left, right|
# BUG: shrink the socket buffers first
left.write_timeout = 0.0001
right.read_timeout = 0.0001
buf = ("a" * 4096).to_slice
expect_raises(IO::Timeout, "Write timed out") do
loop { left.write buf }
end
expect_raises(IO::Timeout, "Read timed out") do
loop { right.read buf }
end
end
end
it "tests socket options" do
UNIXSocket.pair do |left, right|
size = 12000
# linux returns size * 2
sizes = [size, size * 2]
(left.send_buffer_size = size).should eq(size)
sizes.should contain(left.send_buffer_size)
(left.recv_buffer_size = size).should eq(size)
sizes.should contain(left.recv_buffer_size)
end
end
end
describe TCPServer do
it "creates a raw socket" do
sock = TCPServer.new
sock.family.should eq(Socket::Family::INET)
sock = TCPServer.new(Socket::Family::INET6)
sock.family.should eq(Socket::Family::INET6)
end
it "fails when port is in use" do
port = free_udp_socket_port
expect_raises Errno, /(already|Address) in use/ do
sock = Socket.tcp(Socket::Family::INET6)
sock.bind(Socket::IPAddress.new("::1", port))
TCPServer.open("::1", port) { }
end
end
it "doesn't reuse the TCP port by default (SO_REUSEPORT)" do
TCPServer.open("::", 0) do |server|
expect_raises(Errno) do
TCPServer.open("::", server.local_address.port) { }
end
end
end
it "reuses the TCP port (SO_REUSEPORT)" do
TCPServer.open("::", 0, reuse_port: true) do |server|
TCPServer.open("::", server.local_address.port, reuse_port: true) { }
end
end
end
describe TCPSocket do
it "creates a raw socket" do
sock = TCPSocket.new
sock.family.should eq(Socket::Family::INET)
sock = TCPSocket.new(Socket::Family::INET6)
sock.family.should eq(Socket::Family::INET6)
end
it "sends and receives messages" do
port = TCPServer.open("::", 0) do |server|
server.local_address.port
end
port.should be > 0
TCPServer.open("::", port) do |server|
server.local_address.family.should eq(Socket::Family::INET6)
server.local_address.port.should eq(port)
server.local_address.address.should eq("::")
# test protocol specific socket options
server.reuse_address?.should be_true # defaults to true
(server.reuse_address = false).should be_false
server.reuse_address?.should be_false
(server.reuse_address = true).should be_true
server.reuse_address?.should be_true
{% unless flag?(:openbsd) %}
(server.keepalive = false).should be_false
server.keepalive?.should be_false
(server.keepalive = true).should be_true
server.keepalive?.should be_true
{% end %}
(server.linger = nil).should be_nil
server.linger.should be_nil
(server.linger = 42).should eq 42
server.linger.should eq 42
TCPSocket.open("localhost", server.local_address.port) do |client|
# The commented lines are actually dependent on the system configuration,
# so for now we keep it commented. Once we can force the family
# we can uncomment them.
# client.local_address.family.should eq(Socket::Family::INET)
# client.local_address.address.should eq("127.0.0.1")
sock = server.accept
sock.sync?.should eq(server.sync?)
# sock.local_address.family.should eq(Socket::Family::INET6)
# sock.local_address.port.should eq(12345)
# sock.local_address.address.should eq("::ffff:127.0.0.1")
# sock.remote_address.family.should eq(Socket::Family::INET6)
# sock.remote_address.address.should eq("::ffff:127.0.0.1")
# test protocol specific socket options
(client.tcp_nodelay = true).should be_true
client.tcp_nodelay?.should be_true
(client.tcp_nodelay = false).should be_false
client.tcp_nodelay?.should be_false
{% unless flag?(:openbsd) %}
(client.tcp_keepalive_idle = 42).should eq 42
client.tcp_keepalive_idle.should eq 42
(client.tcp_keepalive_interval = 42).should eq 42
client.tcp_keepalive_interval.should eq 42
(client.tcp_keepalive_count = 42).should eq 42
client.tcp_keepalive_count.should eq 42
{% end %}
client << "ping"
sock.gets(4).should eq("ping")
sock << "pong"
client.gets(4).should eq("pong")
end
# test sync flag propagation after accept
server.sync = !server.sync?
TCPSocket.open("localhost", server.local_address.port) do |client|
sock = server.accept
sock.sync?.should eq(server.sync?)
end
end
end
it "fails when connection is refused" do
port = TCPServer.open("localhost", 0) do |server|
server.local_address.port
end
expect_raises(Errno, "Error connecting to 'localhost:#{port}': Connection refused") do
TCPSocket.new("localhost", port)
end
end
it "fails when host doesn't exist" do
expect_raises(Socket::Error, /No address found for doesnotexist.example.org.:12345/) do
TCPSocket.new("doesnotexist.example.org.", 12345)
end
end
it "fails (rather than segfault on darwin) when host doesn't exist and port is 0" do
expect_raises(Socket::Error, /No address found for doesnotexist.example.org.:0/) do
TCPSocket.new("doesnotexist.example.org.", 0)
end
end
end
describe UDPSocket do
it "creates a raw socket" do
sock = UDPSocket.new
sock.family.should eq(Socket::Family::INET)
sock = UDPSocket.new(Socket::Family::INET6)
sock.family.should eq(Socket::Family::INET6)
end
it "reads and writes data to server" do
port = free_udp_socket_port
server = UDPSocket.new(Socket::Family::INET6)
server.bind("::", port)
server.local_address.should eq(Socket::IPAddress.new("::", port))
client = UDPSocket.new(Socket::Family::INET6)
client.connect("::1", port)
client.local_address.family.should eq(Socket::Family::INET6)
client.local_address.address.should eq("::1")
client.remote_address.should eq(Socket::IPAddress.new("::1", port))
client << "message"
server.gets(7).should eq("message")
client.close
server.close
end
it "sends and receives messages over IPv4" do
buffer = uninitialized UInt8[256]
server = UDPSocket.new(Socket::Family::INET)
server.bind("127.0.0.1", 0)
client = UDPSocket.new(Socket::Family::INET)
client.send("message equal to buffer", server.local_address)
bytes_read, client_addr = server.receive(buffer.to_slice[0, 23])
message = String.new(buffer.to_slice[0, bytes_read])
message.should eq("message equal to buffer")
client_addr.should eq(Socket::IPAddress.new("127.0.0.1", client.local_address.port))
client.send("message less than buffer", server.local_address)
bytes_read, client_addr = server.receive(buffer.to_slice)
message = String.new(buffer.to_slice[0, bytes_read])
message.should eq("message less than buffer")
client.connect server.local_address
client.send "ip4 message"
message, client_addr = server.receive
message.should eq("ip4 message")
client_addr.should eq(Socket::IPAddress.new("127.0.0.1", client.local_address.port))
server.close
client.close
end
it "sends and receives messages over IPv6" do
buffer = uninitialized UInt8[1500]
server = UDPSocket.new(Socket::Family::INET6)
server.bind("::1", 0)
client = UDPSocket.new(Socket::Family::INET6)
client.send("some message", server.local_address)
bytes_read, client_addr = server.receive(buffer.to_slice)
String.new(buffer.to_slice[0, bytes_read]).should eq("some message")
client_addr.should eq(Socket::IPAddress.new("::1", client.local_address.port))
client.connect server.local_address
client.send "ip6 message"
message, client_addr = server.receive(20)
message.should eq("ip6 message")
client_addr.should eq(Socket::IPAddress.new("::1", client.local_address.port))
server.close
client.close
end
it "broadcasts messages" do
port = free_udp_socket_port
client = UDPSocket.new(Socket::Family::INET)
client.broadcast = true
client.broadcast?.should be_true
client.connect("255.255.255.255", port)
client.send("broadcast").should eq(9)
client.close
end
end
private def free_udp_socket_port
server = UDPSocket.new(Socket::Family::INET6)
server.bind("::", 0)
port = server.local_address.port
server.close
port.should be > 0
port
end