mirror of
https://github.com/sshuttle/sshuttle.git
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167a57e739
In instances where a cluster pod in a local VM needs to access a server that is sshuttle'd from the host, since the packets arriving at the host already made a hop, their TTL is 63 and so get ignored by sshuttle. Allowing an override of the firewall TTL rule allows the packets to go through.
308 lines
13 KiB
Python
308 lines
13 KiB
Python
import socket
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from socket import AF_INET, AF_INET6
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from unittest.mock import Mock, patch, call
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from sshuttle.methods import get_method
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@patch("sshuttle.methods.tproxy.recvmsg")
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def test_get_supported_features_recvmsg(mock_recvmsg):
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method = get_method('tproxy')
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features = method.get_supported_features()
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assert features.ipv6
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assert features.udp
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assert features.dns
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@patch("sshuttle.methods.tproxy.recvmsg", None)
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def test_get_supported_features_norecvmsg():
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method = get_method('tproxy')
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features = method.get_supported_features()
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assert features.ipv6
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assert not features.udp
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assert not features.dns
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def test_get_tcp_dstip():
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sock = Mock()
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sock.getsockname.return_value = ('127.0.0.1', 1024)
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method = get_method('tproxy')
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assert method.get_tcp_dstip(sock) == ('127.0.0.1', 1024)
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assert sock.mock_calls == [call.getsockname()]
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@patch("sshuttle.methods.tproxy.recv_udp")
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def test_recv_udp(mock_recv_udp):
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mock_recv_udp.return_value = ("127.0.0.1", "127.0.0.2", "11111")
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sock = Mock()
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method = get_method('tproxy')
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result = method.recv_udp(sock, 1024)
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assert sock.mock_calls == []
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assert mock_recv_udp.mock_calls == [call(sock, 1024)]
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assert result == ("127.0.0.1", "127.0.0.2", "11111")
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@patch("sshuttle.methods.socket.socket")
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def test_send_udp(mock_socket):
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sock = Mock()
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method = get_method('tproxy')
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method.send_udp(sock, "127.0.0.2", "127.0.0.1", "2222222")
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assert sock.mock_calls == []
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assert mock_socket.mock_calls == [
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call(sock.family, 2),
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call().setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1),
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call().setsockopt(0, 19, 1),
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call().bind('127.0.0.2'),
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call().sendto("2222222", '127.0.0.1'),
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call().close()
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]
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def test_setup_tcp_listener():
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listener = Mock()
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method = get_method('tproxy')
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method.setup_tcp_listener(listener)
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assert listener.mock_calls == [
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call.setsockopt(0, 19, 1)
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]
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def test_setup_udp_listener():
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listener = Mock()
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method = get_method('tproxy')
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method.setup_udp_listener(listener)
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assert listener.mock_calls == [
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call.setsockopt(0, 19, 1),
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call.v4.setsockopt(0, 20, 1),
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call.v6.setsockopt(41, 74, 1)
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]
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def test_assert_features():
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method = get_method('tproxy')
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features = method.get_supported_features()
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method.assert_features(features)
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def test_firewall_command():
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method = get_method('tproxy')
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assert not method.firewall_command("somthing")
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@patch('sshuttle.methods.tproxy.ipt')
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@patch('sshuttle.methods.tproxy.ipt_ttl')
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@patch('sshuttle.methods.tproxy.ipt_chain_exists')
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def test_setup_firewall(mock_ipt_chain_exists, mock_ipt_ttl, mock_ipt):
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mock_ipt_chain_exists.return_value = True
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method = get_method('tproxy')
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assert method.name == 'tproxy'
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# IPV6
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method.setup_firewall(
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1024, 1026,
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[(AF_INET6, u'2404:6800:4004:80c::33')],
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AF_INET6,
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[(AF_INET6, 64, False, u'2404:6800:4004:80c::', 8000, 9000),
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(AF_INET6, 128, True, u'2404:6800:4004:80c::101f', 8080, 8080)],
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True,
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None,
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63)
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assert mock_ipt_chain_exists.mock_calls == [
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call(AF_INET6, 'mangle', 'sshuttle-m-1024'),
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call(AF_INET6, 'mangle', 'sshuttle-t-1024'),
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call(AF_INET6, 'mangle', 'sshuttle-d-1024')
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]
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assert mock_ipt_ttl.mock_calls == []
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assert mock_ipt.mock_calls == [
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call(AF_INET6, 'mangle', '-D', 'OUTPUT', '-j', 'sshuttle-m-1024'),
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call(AF_INET6, 'mangle', '-F', 'sshuttle-m-1024'),
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call(AF_INET6, 'mangle', '-X', 'sshuttle-m-1024'),
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call(AF_INET6, 'mangle', '-D', 'PREROUTING', '-j', 'sshuttle-t-1024'),
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call(AF_INET6, 'mangle', '-F', 'sshuttle-t-1024'),
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call(AF_INET6, 'mangle', '-X', 'sshuttle-t-1024'),
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call(AF_INET6, 'mangle', '-F', 'sshuttle-d-1024'),
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call(AF_INET6, 'mangle', '-X', 'sshuttle-d-1024'),
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call(AF_INET6, 'mangle', '-N', 'sshuttle-m-1024'),
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call(AF_INET6, 'mangle', '-F', 'sshuttle-m-1024'),
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call(AF_INET6, 'mangle', '-N', 'sshuttle-d-1024'),
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call(AF_INET6, 'mangle', '-F', 'sshuttle-d-1024'),
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call(AF_INET6, 'mangle', '-N', 'sshuttle-t-1024'),
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call(AF_INET6, 'mangle', '-F', 'sshuttle-t-1024'),
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call(AF_INET6, 'mangle', '-I', 'OUTPUT', '1', '-j', 'sshuttle-m-1024'),
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call(AF_INET6, 'mangle', '-I', 'PREROUTING', '1', '-j',
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'sshuttle-t-1024'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-t-1024', '-j', 'RETURN',
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'-m', 'addrtype', '--dst-type', 'LOCAL'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-m-1024', '-j', 'RETURN',
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'-m', 'addrtype', '--dst-type', 'LOCAL'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-d-1024', '-j', 'MARK',
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'--set-mark', '1'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-d-1024', '-j', 'ACCEPT'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-t-1024', '-m', 'socket',
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'-j', 'sshuttle-d-1024', '-m', 'tcp', '-p', 'tcp'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-t-1024', '-m', 'socket',
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'-j', 'sshuttle-d-1024', '-m', 'udp', '-p', 'udp'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-m-1024', '-j', 'MARK',
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'--set-mark', '1', '--dest', u'2404:6800:4004:80c::33/32',
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'-m', 'udp', '-p', 'udp', '--dport', '53'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-t-1024', '-j', 'TPROXY',
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'--tproxy-mark', '0x1/0x1',
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'--dest', u'2404:6800:4004:80c::33/32',
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'-m', 'udp', '-p', 'udp', '--dport', '53', '--on-port', '1026'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-m-1024', '-j', 'RETURN',
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'--dest', u'2404:6800:4004:80c::101f/128',
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'-m', 'tcp', '-p', 'tcp', '--dport', '8080:8080'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-t-1024', '-j', 'RETURN',
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'--dest', u'2404:6800:4004:80c::101f/128',
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'-m', 'tcp', '-p', 'tcp', '--dport', '8080:8080'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-m-1024', '-j', 'RETURN',
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'--dest', u'2404:6800:4004:80c::101f/128',
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'-m', 'udp', '-p', 'udp', '--dport', '8080:8080'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-t-1024', '-j', 'RETURN',
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'--dest', u'2404:6800:4004:80c::101f/128',
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'-m', 'udp', '-p', 'udp', '--dport', '8080:8080'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-m-1024', '-j', 'MARK',
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'--set-mark', '1', '--dest', u'2404:6800:4004:80c::/64',
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'-m', 'tcp', '-p', 'tcp', '--dport', '8000:9000'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-t-1024', '-j', 'TPROXY',
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'--tproxy-mark', '0x1/0x1', '--dest', u'2404:6800:4004:80c::/64',
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'-m', 'tcp', '-p', 'tcp', '--dport', '8000:9000',
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'--on-port', '1024'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-m-1024', '-j', 'MARK',
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'--set-mark', '1', '--dest', u'2404:6800:4004:80c::/64',
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'-m', 'udp', '-p', 'udp', '--dport', '8000:9000'),
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call(AF_INET6, 'mangle', '-A', 'sshuttle-t-1024', '-j', 'TPROXY',
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'--tproxy-mark', '0x1/0x1', '--dest', u'2404:6800:4004:80c::/64',
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'-m', 'udp', '-p', 'udp', '--dport', '8000:9000',
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'--on-port', '1024')
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]
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mock_ipt_chain_exists.reset_mock()
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mock_ipt_ttl.reset_mock()
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mock_ipt.reset_mock()
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method.restore_firewall(1025, AF_INET6, True, None)
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assert mock_ipt_chain_exists.mock_calls == [
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call(AF_INET6, 'mangle', 'sshuttle-m-1025'),
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call(AF_INET6, 'mangle', 'sshuttle-t-1025'),
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call(AF_INET6, 'mangle', 'sshuttle-d-1025')
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]
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assert mock_ipt_ttl.mock_calls == []
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assert mock_ipt.mock_calls == [
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call(AF_INET6, 'mangle', '-D', 'OUTPUT', '-j', 'sshuttle-m-1025'),
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call(AF_INET6, 'mangle', '-F', 'sshuttle-m-1025'),
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call(AF_INET6, 'mangle', '-X', 'sshuttle-m-1025'),
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call(AF_INET6, 'mangle', '-D', 'PREROUTING', '-j', 'sshuttle-t-1025'),
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call(AF_INET6, 'mangle', '-F', 'sshuttle-t-1025'),
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call(AF_INET6, 'mangle', '-X', 'sshuttle-t-1025'),
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call(AF_INET6, 'mangle', '-F', 'sshuttle-d-1025'),
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call(AF_INET6, 'mangle', '-X', 'sshuttle-d-1025')
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]
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mock_ipt_chain_exists.reset_mock()
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mock_ipt_ttl.reset_mock()
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mock_ipt.reset_mock()
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# IPV4
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method.setup_firewall(
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1025, 1027,
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[(AF_INET, u'1.2.3.33')],
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AF_INET,
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[(AF_INET, 24, False, u'1.2.3.0', 0, 0),
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(AF_INET, 32, True, u'1.2.3.66', 80, 80)],
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True,
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None,
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63)
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assert mock_ipt_chain_exists.mock_calls == [
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call(AF_INET, 'mangle', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', 'sshuttle-t-1025'),
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call(AF_INET, 'mangle', 'sshuttle-d-1025')
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]
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assert mock_ipt_ttl.mock_calls == []
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assert mock_ipt.mock_calls == [
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call(AF_INET, 'mangle', '-D', 'OUTPUT', '-j', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', '-F', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', '-X', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', '-D', 'PREROUTING', '-j', 'sshuttle-t-1025'),
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call(AF_INET, 'mangle', '-F', 'sshuttle-t-1025'),
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call(AF_INET, 'mangle', '-X', 'sshuttle-t-1025'),
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call(AF_INET, 'mangle', '-F', 'sshuttle-d-1025'),
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call(AF_INET, 'mangle', '-X', 'sshuttle-d-1025'),
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call(AF_INET, 'mangle', '-N', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', '-F', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', '-N', 'sshuttle-d-1025'),
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call(AF_INET, 'mangle', '-F', 'sshuttle-d-1025'),
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call(AF_INET, 'mangle', '-N', 'sshuttle-t-1025'),
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call(AF_INET, 'mangle', '-F', 'sshuttle-t-1025'),
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call(AF_INET, 'mangle', '-I', 'OUTPUT', '1', '-j', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', '-I', 'PREROUTING', '1', '-j',
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'sshuttle-t-1025'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-t-1025', '-j', 'RETURN',
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'-m', 'addrtype', '--dst-type', 'LOCAL'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-m-1025', '-j', 'RETURN',
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'-m', 'addrtype', '--dst-type', 'LOCAL'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-d-1025',
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'-j', 'MARK', '--set-mark', '1'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-d-1025', '-j', 'ACCEPT'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-t-1025', '-m', 'socket',
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'-j', 'sshuttle-d-1025', '-m', 'tcp', '-p', 'tcp'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-t-1025', '-m', 'socket',
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'-j', 'sshuttle-d-1025', '-m', 'udp', '-p', 'udp'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-m-1025', '-j', 'MARK',
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'--set-mark', '1', '--dest', u'1.2.3.33/32',
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'-m', 'udp', '-p', 'udp', '--dport', '53'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-t-1025', '-j', 'TPROXY',
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'--tproxy-mark', '0x1/0x1', '--dest', u'1.2.3.33/32',
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'-m', 'udp', '-p', 'udp', '--dport', '53', '--on-port', '1027'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-m-1025', '-j', 'RETURN',
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'--dest', u'1.2.3.66/32', '-m', 'tcp', '-p', 'tcp',
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'--dport', '80:80'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-t-1025', '-j', 'RETURN',
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'--dest', u'1.2.3.66/32', '-m', 'tcp', '-p', 'tcp',
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'--dport', '80:80'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-m-1025', '-j', 'RETURN',
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'--dest', u'1.2.3.66/32', '-m', 'udp', '-p', 'udp',
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'--dport', '80:80'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-t-1025', '-j', 'RETURN',
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'--dest', u'1.2.3.66/32', '-m', 'udp', '-p', 'udp',
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'--dport', '80:80'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-m-1025', '-j', 'MARK',
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'--set-mark', '1', '--dest', u'1.2.3.0/24',
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'-m', 'tcp', '-p', 'tcp'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-t-1025', '-j', 'TPROXY',
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'--tproxy-mark', '0x1/0x1', '--dest', u'1.2.3.0/24',
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'-m', 'tcp', '-p', 'tcp', '--on-port', '1025'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-m-1025', '-j', 'MARK',
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'--set-mark', '1', '--dest', u'1.2.3.0/24',
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'-m', 'udp', '-p', 'udp'),
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call(AF_INET, 'mangle', '-A', 'sshuttle-t-1025', '-j', 'TPROXY',
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'--tproxy-mark', '0x1/0x1', '--dest', u'1.2.3.0/24',
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'-m', 'udp', '-p', 'udp', '--on-port', '1025')
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]
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mock_ipt_chain_exists.reset_mock()
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mock_ipt_ttl.reset_mock()
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mock_ipt.reset_mock()
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method.restore_firewall(1025, AF_INET, True, None)
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assert mock_ipt_chain_exists.mock_calls == [
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call(AF_INET, 'mangle', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', 'sshuttle-t-1025'),
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call(AF_INET, 'mangle', 'sshuttle-d-1025')
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]
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assert mock_ipt_ttl.mock_calls == []
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assert mock_ipt.mock_calls == [
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call(AF_INET, 'mangle', '-D', 'OUTPUT', '-j', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', '-F', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', '-X', 'sshuttle-m-1025'),
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call(AF_INET, 'mangle', '-D', 'PREROUTING', '-j', 'sshuttle-t-1025'),
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call(AF_INET, 'mangle', '-F', 'sshuttle-t-1025'),
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call(AF_INET, 'mangle', '-X', 'sshuttle-t-1025'),
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call(AF_INET, 'mangle', '-F', 'sshuttle-d-1025'),
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call(AF_INET, 'mangle', '-X', 'sshuttle-d-1025')
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]
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mock_ipt_chain_exists.reset_mock()
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mock_ipt_ttl.reset_mock()
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mock_ipt.reset_mock()
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