1 import nepi.util.environ
6 # Unittest from Python 2.6 doesn't have these decorators
7 def _bannerwrap(f, text):
9 def banner(*args, **kwargs):
10 sys.stderr.write("*** WARNING: Skipping test %s: `%s'\n" %
15 return lambda f: _bannerwrap(f, text)
16 def skipUnless(cond, text):
17 return (lambda f: _bannerwrap(f, text)) if not cond else lambda f: f
18 def skipIf(cond, text):
19 return (lambda f: _bannerwrap(f, text)) if cond else lambda f: f
21 def ns3_bindings_path():
22 if "NEPI_NS3BINDINGS" in os.environ:
23 return os.environ["NEPI_NS3BINDINGS"]
26 def ns3_library_path():
27 if "NEPI_NS3LIBRARY" in os.environ:
28 return os.environ["NEPI_NS3LIBRARY"]
33 from nepi.testbeds.ns3 import execute
34 execute.load_ns3_module()
38 traceback.print_exc(file = sys.stderr)
43 user = os.environ.get('PL_USER')
44 pwd = os.environ.get('PL_PASS')
51 def find_bin(name, extra_path = None):
53 if "PATH" in os.environ:
54 search += os.environ["PATH"].split(":")
55 for pref in ("/", "/usr/", "/usr/local/"):
56 for d in ("bin", "sbin"):
57 search.append(pref + d)
63 os.stat(d + "/" + name)
66 if e.errno != os.errno.ENOENT:
70 def find_bin_or_die(name, extra_path = None):
73 raise RuntimeError(("Cannot find `%s' command, impossible to " +
79 import os, os.path, re, signal, shutil, socket, subprocess, tempfile
80 def gen_ssh_keypair(filename):
81 ssh_keygen = nepi.util.environ.find_bin_or_die("ssh-keygen")
82 args = [ssh_keygen, '-q', '-N', '', '-f', filename]
83 assert subprocess.Popen(args).wait() == 0
84 return filename, "%s.pub" % filename
86 def add_key_to_agent(filename):
87 ssh_add = nepi.util.environ.find_bin_or_die("ssh-add")
88 args = [ssh_add, filename]
89 null = file("/dev/null", "w")
90 assert subprocess.Popen(args, stderr = null).wait() == 0
95 s.bind(("127.0.0.1", 0))
96 port = s.getsockname()[1]
99 _SSH_CONF = """ListenAddress 127.0.0.1:%d
102 UsePrivilegeSeparation no
103 PubkeyAuthentication yes
104 PasswordAuthentication no
105 AuthorizedKeysFile %s
107 AllowAgentForwarding yes
110 PermitUserEnvironment yes
113 def gen_sshd_config(filename, port, server_key, auth_keys):
114 conf = open(filename, "w")
115 text = _SSH_CONF % (port, server_key, auth_keys)
120 def gen_auth_keys(pubkey, output, environ):
121 #opts = ['from="127.0.0.1/32"'] # fails in stupid yans setup
123 for k, v in environ.items():
124 opts.append('environment="%s=%s"' % (k, v))
126 lines = file(pubkey).readlines()
127 pubkey = lines[0].split()[0:2]
128 out = file(output, "w")
129 out.write("%s %s %s\n" % (",".join(opts), pubkey[0], pubkey[1]))
133 def start_ssh_agent():
134 ssh_agent = nepi.util.environ.find_bin_or_die("ssh-agent")
135 proc = subprocess.Popen([ssh_agent], stdout = subprocess.PIPE)
136 (out, foo) = proc.communicate()
137 assert proc.returncode == 0
139 for l in out.split("\n"):
140 match = re.search("^(\w+)=([^ ;]+);.*", l)
143 k, v = match.groups()
148 def stop_ssh_agent(data):
149 # No need to gather the pid, ssh-agent knows how to kill itself; after we
150 # had set up the environment
151 ssh_agent = nepi.util.environ.find_bin_or_die("ssh-agent")
152 null = file("/dev/null", "w")
153 proc = subprocess.Popen([ssh_agent, "-k"], stdout = null)
155 assert proc.wait() == 0
159 class test_environment(object):
161 sshd = find_bin_or_die("sshd")
163 if 'PYTHONPATH' in os.environ:
164 environ['PYTHONPATH'] = ":".join(map(os.path.realpath,
165 os.environ['PYTHONPATH'].split(":")))
166 if 'NEPI_NS3BINDINGS' in os.environ:
167 environ['NEPI_NS3BINDINGS'] = \
168 os.path.realpath(os.environ['NEPI_NS3BINDINGS'])
169 if 'NEPI_NS3LIBRARY' in os.environ:
170 environ['NEPI_NS3LIBRARY'] = \
171 os.path.realpath(os.environ['NEPI_NS3LIBRARY'])
173 self.dir = tempfile.mkdtemp()
174 self.server_keypair = gen_ssh_keypair(
175 os.path.join(self.dir, "server_key"))
176 self.client_keypair = gen_ssh_keypair(
177 os.path.join(self.dir, "client_key"))
178 self.authorized_keys = gen_auth_keys(self.client_keypair[1],
179 os.path.join(self.dir, "authorized_keys"), environ)
180 self.port = get_free_port()
181 self.sshd_conf = gen_sshd_config(
182 os.path.join(self.dir, "sshd_config"),
183 self.port, self.server_keypair[0], self.authorized_keys)
185 self.sshd = subprocess.Popen([sshd, '-q', '-D', '-f', self.sshd_conf])
186 self.ssh_agent_vars = start_ssh_agent()
187 add_key_to_agent(self.client_keypair[0])
191 os.kill(self.sshd.pid, signal.SIGTERM)
193 if self.ssh_agent_vars:
194 stop_ssh_agent(self.ssh_agent_vars)
195 shutil.rmtree(self.dir)