1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
import dbus
import uuid
import re
import twisted.protocols.sip
from servicetest import (
make_channel_proxy,
assertContains,
)
import constants as cs
class VoipTestContext(object):
# Default audio codecs for the remote end
audio_codecs = [ ('GSM', 3, 8000, {}),
('PCMA', 8, 8000, {}),
('PCMU', 0, 8000, {}) ]
# Default video codecs for the remote end. I have no idea what's
# a suitable value here...
video_codecs = [ ('H264', 96, 90000, {}) ]
# Default candidates for the remote end
remote_candidates = [
(1, # Component
"192.168.0.1", # ip
2222, # port
{'protocol': cs.MEDIA_STREAM_BASE_PROTO_UDP,
'priority': 0}),
(2, # Component
"192.168.0.1", # ip
2223, # port
{'protocol': cs.MEDIA_STREAM_BASE_PROTO_UDP,
'priority': 0})
]
_mline_template = 'm=%(mediatype)s %(port)s RTP/AVP %(codec_ids)s'
_aline_template = 'a=rtpmap:%(codec_id)s %(name)s/%(rate)s'
def __init__(self, q, conn, bus, sip_proxy, our_uri, peer):
self.bus = bus
self.conn = conn
self.q = q
self.our_uri = our_uri
self.peer = peer
self.peer_id = "sip:" + peer
self.sip_proxy = sip_proxy
self._cseq_id = 1
self.to = None
def dbusify_codecs(self, codecs):
dbussed_codecs = [ (id, name, rate, 1, False, params )
for (name, id, rate, params) in codecs ]
return dbus.Array(dbussed_codecs, signature='(usuuba{ss})')
def dbusify_codecs_with_params (self, codecs):
return self.dbusify_codecs(codecs)
def get_md_dbus(self, codecs, remote_contact):
return dbus.Dictionary(
{cs.CALL_CONTENT_MEDIA_DESCRIPTION + ".Codecs": self.dbusify_codecs(codecs),
cs.CALL_CONTENT_MEDIA_DESCRIPTION + ".RemoteContact":
dbus.UInt32(remote_contact)},
signature='sv')
def get_audio_md_dbus(self, remote_contact):
return self.get_md_dbus(self.audio_codecs, remote_contact)
def get_video_md_dbus(self, remote_contact):
return self.get_md_dbus(self.video_codecs, remote_contact)
def get_remote_candidates_dbus(self):
return dbus.Array(self.remote_candidates, signature='(usua{sv})')
def get_call_sdp(self, medias):
(component, ip, port, info) = self.remote_candidates[0]
codec_id_list = []
codec_list = []
for name, codec_id, rate, _misc in self.audio_codecs:
codec_list.append('a=rtpmap:%(codec_id)s %(name)s/%(rate)s' % locals())
codec_id_list.append(str(codec_id))
codec_ids = ' '.join(codec_id_list)
codecs = '\r\n'.join(codec_list)
sdp_string = 'v=0\r\n' + \
'o=- 7047265765596858314 2813734028456100815 IN IP4 %(ip)s\r\n' + \
's=-\r\n' + \
't=0 0\r\n'
for m in medias:
if m[0]:
sdp_string += 'm=' + m[0] + ' %(port)s RTP/AVP 3 8 0\r\n' \
'c=IN IP4 %(ip)s\r\n' \
'%(codecs)s\r\n'
if m[1]:
sdp_string += 'a=' + m[1] + '\r\n'
else:
sdp_string += 'm=audio 0 RTP/AVP\r\n'
return sdp_string % locals()
def check_call_sdp(self, sdp_string, medias=[('audio', None)]):
codec_id_list = []
for name, codec_id, rate, _misc in self.audio_codecs:
assertContains (self._aline_template % locals(), sdp_string)
codec_id_list.append(str(codec_id))
codec_ids = ' '.join(codec_id_list)
(component, ip, port, info) = self.remote_candidates[0]
pattern = '.*'
for m in medias:
if m[0]:
mediatype = m[0]
pattern += self._mline_template % locals()
pattern += '.*'
if m[1]:
pattern += 'a=' + m[1] + '.*'
else:
pattern += 'm=audio 0 RTP/AVP .*'
assert re.search(pattern, sdp_string, re.MULTILINE | re.DOTALL)
def send_message(self, message_type, body='', to_=None, from_=None,
**additional_headers):
url = twisted.protocols.sip.parseURL('sip:testacc@127.0.0.1')
msg = twisted.protocols.sip.Request(message_type, url)
if body:
msg.body = body
msg.addHeader('content-length', '%d' % len(msg.body))
msg.addHeader('from', from_ or '<%s>;tag=XYZ' % self.peer_id)
msg.addHeader('to', to_ or self.to or '<sip:testacc@127.0.0.1>')
self._cseq_id += 1
additional_headers.setdefault('cseq', '%d %s' % (self._cseq_id, message_type))
for key, vals in additional_headers.items():
if not isinstance(vals, list):
vals = [vals]
k = key.replace('_', '-')
for v in vals:
msg.addHeader(k, v)
via = self.sip_proxy.getVia()
via.branch = 'z9hG4bKXYZ'
msg.addHeader('via', via.toString())
_expire, destination = self.sip_proxy.registry.users['testacc']
self.sip_proxy.sendMessage(destination, msg)
return msg
def accept(self, invite_message, body=None):
self.call_id = invite_message.headers['call-id'][0]
if invite_message.headers['from'][0].find('tag='):
self.to = invite_message.headers['from'][0]
response = self.sip_proxy.responseFromRequest(200, invite_message)
# Echo rakia's SDP back to it. It doesn't care.
response.addHeader('content-type', 'application/sdp')
response.body = body or invite_message.body
response.addHeader('content-length', '%d' % len(response.body))
self.sip_proxy.deliverResponse(response)
return response
def pr_respond(self, invite_message, number):
self.call_id = invite_message.headers['call-id'][0]
response = self.sip_proxy.responseFromRequest(number, invite_message)
self.sip_proxy.deliverResponse(response)
return response
def ack(self, ok_message):
cseq = '%s ACK' % ok_message.headers['cseq'][0].split()[0]
self.send_message('ACK', call_id=self.call_id, cseq=cseq)
def reinvite(self, medias=[('audio', None)]):
body = self.get_call_sdp(medias)
return self.send_message('INVITE', body, content_type='application/sdp',
supported='timer, 100rel', call_id=self.call_id)
def incoming_call(self, medias=[('audio', None)]):
self.call_id = uuid.uuid4().hex
body = self.get_call_sdp(medias)
return self.send_message('INVITE', body, content_type='application/sdp',
supported='timer, 100rel', call_id=self.call_id)
def incoming_call_from_self(self):
self.call_id = uuid.uuid4().hex
body = self.get_call_sdp([('audio', None)])
return self.send_message('INVITE', body, content_type='application/sdp',
supported='timer, 100rel', call_id=self.call_id,
from_='<sip:testacc@127.0.0.1>')
def terminate(self):
return self.send_message('BYE', call_id=self.call_id)
def options_ping(self, q):
self.send_message('OPTIONS',
supported='timer, 100rel', call_id=self.call_id)
acc = q.expect('sip-response', call_id=self.call_id, code=200,
cseq='%s OPTIONS' % (self._cseq_id))
self.ack(acc.sip_message)
|
