3 import nepi.util.environ
8 # Unittest from Python 2.6 doesn't have these decorators
9 def _bannerwrap(f, text):
11 def banner(*args, **kwargs):
12 sys.stderr.write("*** WARNING: Skipping test %s: `%s'\n" %
17 return lambda f: _bannerwrap(f, text)
18 def skipUnless(cond, text):
19 return (lambda f: _bannerwrap(f, text)) if not cond else lambda f: f
20 def skipIf(cond, text):
21 return (lambda f: _bannerwrap(f, text)) if cond else lambda f: f
23 def ns3_bindings_path():
24 if "NEPI_NS3BINDINGS" in os.environ:
25 return os.environ["NEPI_NS3BINDINGS"]
28 def ns3_library_path():
29 if "NEPI_NS3LIBRARY" in os.environ:
30 return os.environ["NEPI_NS3LIBRARY"]
34 if ns3_library_path():
36 ctypes.CDLL(ns3_library_path(), ctypes.RTLD_GLOBAL)
40 if ns3_bindings_path():
41 sys.path.insert(0, ns3_bindings_path())
44 found = imp.find_module('ns3')
45 module = imp.load_module('ns3', *found)
48 found = imp.find_module('_ns3')
49 module = imp.load_module('_ns3', *found)
53 if ns3_bindings_path():
59 user = os.environ.get('PL_USER')
60 pwd = os.environ.get('PL_PASS')
67 def find_bin(name, extra_path = None):
69 if "PATH" in os.environ:
70 search += os.environ["PATH"].split(":")
71 for pref in ("/", "/usr/", "/usr/local/"):
72 for d in ("bin", "sbin"):
73 search.append(pref + d)
79 os.stat(d + "/" + name)
82 if e.errno != os.errno.ENOENT:
86 def find_bin_or_die(name, extra_path = None):
89 raise RuntimeError(("Cannot find `%s' command, impossible to " +
95 import os, os.path, re, signal, shutil, socket, subprocess, tempfile
96 def gen_ssh_keypair(filename):
97 ssh_keygen = nepi.util.environ.find_bin_or_die("ssh-keygen")
98 args = [ssh_keygen, '-q', '-N', '', '-f', filename]
99 assert subprocess.Popen(args).wait() == 0
100 return filename, "%s.pub" % filename
102 def add_key_to_agent(filename):
103 ssh_add = nepi.util.environ.find_bin_or_die("ssh-add")
104 args = [ssh_add, filename]
105 null = file("/dev/null", "w")
106 assert subprocess.Popen(args, stderr = null).wait() == 0
111 s.bind(("127.0.0.1", 0))
112 port = s.getsockname()[1]
115 _SSH_CONF = """ListenAddress 127.0.0.1:%d
118 UsePrivilegeSeparation no
119 PubkeyAuthentication yes
120 PasswordAuthentication no
121 AuthorizedKeysFile %s
123 AllowAgentForwarding yes
126 PermitUserEnvironment yes
129 def gen_sshd_config(filename, port, server_key, auth_keys):
130 conf = open(filename, "w")
131 text = _SSH_CONF % (port, server_key, auth_keys)
136 def gen_auth_keys(pubkey, output, environ):
137 #opts = ['from="127.0.0.1/32"'] # fails in stupid yans setup
139 for k, v in environ.items():
140 opts.append('environment="%s=%s"' % (k, v))
142 lines = file(pubkey).readlines()
143 pubkey = lines[0].split()[0:2]
144 out = file(output, "w")
145 out.write("%s %s %s\n" % (",".join(opts), pubkey[0], pubkey[1]))
149 def start_ssh_agent():
150 ssh_agent = nepi.util.environ.find_bin_or_die("ssh-agent")
151 proc = subprocess.Popen([ssh_agent], stdout = subprocess.PIPE)
152 (out, foo) = proc.communicate()
153 assert proc.returncode == 0
155 for l in out.split("\n"):
156 match = re.search("^(\w+)=([^ ;]+);.*", l)
159 k, v = match.groups()
164 def stop_ssh_agent(data):
165 # No need to gather the pid, ssh-agent knows how to kill itself; after we
166 # had set up the environment
167 ssh_agent = nepi.util.environ.find_bin_or_die("ssh-agent")
168 null = file("/dev/null", "w")
169 proc = subprocess.Popen([ssh_agent, "-k"], stdout = null)
171 assert proc.wait() == 0
175 class test_environment(object):
177 sshd = find_bin_or_die("sshd")
179 if 'PYTHONPATH' in os.environ:
180 environ['PYTHONPATH'] = ":".join(map(os.path.realpath,
181 os.environ['PYTHONPATH'].split(":")))
182 if 'NEPI_NS3BINDINGS' in os.environ:
183 environ['NEPI_NS3BINDINGS'] = \
184 os.path.realpath(os.environ['NEPI_NS3BINDINGS'])
185 if 'NEPI_NS3LIBRARY' in os.environ:
186 environ['NEPI_NS3LIBRARY'] = \
187 os.path.realpath(os.environ['NEPI_NS3LIBRARY'])
189 self.dir = tempfile.mkdtemp()
190 self.server_keypair = gen_ssh_keypair(
191 os.path.join(self.dir, "server_key"))
192 self.client_keypair = gen_ssh_keypair(
193 os.path.join(self.dir, "client_key"))
194 self.authorized_keys = gen_auth_keys(self.client_keypair[1],
195 os.path.join(self.dir, "authorized_keys"), environ)
196 self.port = get_free_port()
197 self.sshd_conf = gen_sshd_config(
198 os.path.join(self.dir, "sshd_config"),
199 self.port, self.server_keypair[0], self.authorized_keys)
201 self.sshd = subprocess.Popen([sshd, '-q', '-D', '-f', self.sshd_conf])
202 self.ssh_agent_vars = start_ssh_agent()
203 add_key_to_agent(self.client_keypair[0])
207 os.kill(self.sshd.pid, signal.SIGTERM)
209 if self.ssh_agent_vars:
210 stop_ssh_agent(self.ssh_agent_vars)
211 shutil.rmtree(self.dir)