Mercurial > libervia-backend
annotate libervia/backend/plugins/plugin_xep_0167/mapping.py @ 4289:33ecebb2c02f
plugin XEP-0167: fix session level SDP attributes parsing:
rel 447
author | Goffi <goffi@goffi.org> |
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date | Mon, 29 Jul 2024 03:31:02 +0200 |
parents | 00a9316547ed |
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1 #!/usr/bin/env python3 |
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2 |
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3 # Libervia: an XMPP client |
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4 # Copyright (C) 2009-2023 Jérôme Poisson (goffi@goffi.org) |
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5 |
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6 # This program is free software: you can redistribute it and/or modify |
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7 # it under the terms of the GNU Affero General Public License as published by |
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8 # the Free Software Foundation, either version 3 of the License, or |
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9 # (at your option) any later version. |
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10 |
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11 # This program is distributed in the hope that it will be useful, |
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 # GNU Affero General Public License for more details. |
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15 |
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16 # You should have received a copy of the GNU Affero General Public License |
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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18 |
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19 import base64 |
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20 from typing import Any, Dict, Optional |
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21 |
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22 from twisted.words.xish import domish |
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23 |
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24 from libervia.backend.core.constants import Const as C |
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25 from libervia.backend.core.log import getLogger |
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26 |
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27 from .constants import NS_JINGLE_RTP |
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28 |
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29 log = getLogger(__name__) |
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30 |
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31 host = None |
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32 |
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33 |
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34 def senders_to_sdp(senders: str, session: dict) -> str: |
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35 """Returns appropriate SDP attribute corresponding to Jingle senders attribute""" |
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36 if senders == "both": |
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37 return "a=sendrecv" |
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38 elif senders == "none": |
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39 return "a=inactive" |
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40 elif session["role"] != senders: |
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41 return "a=sendonly" |
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42 else: |
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43 return "a=recvonly" |
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44 |
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45 |
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46 def generate_sdp_from_session(session: dict, local: bool = False, port: int = 9) -> str: |
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47 """Generate an SDP string from session data. |
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48 |
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49 @param session: A dictionary containing the session data. It should have the |
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50 following structure: |
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51 |
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52 { |
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53 "contents": { |
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54 "<content_id>": { |
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55 "application_data": { |
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56 "media": <str: "audio" or "video">, |
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57 "local_data": <media_data dict>, |
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58 "peer_data": <media_data dict>, |
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59 ... |
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60 }, |
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61 "transport_data": { |
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62 "local_ice_data": <ice_data dict>, |
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63 "peer_ice_data": <ice_data dict>, |
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64 ... |
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65 }, |
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66 ... |
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67 }, |
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68 ... |
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69 } |
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70 } |
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71 @param local: A boolean value indicating whether to generate SDP for the local or |
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72 peer entity. If True, the method will generate SDP for the local entity, |
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73 otherwise for the peer entity. Generally the local SDP is received from frontends |
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74 and not needed in backend, except for debugging purpose. |
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75 @param port: The preferred port for communications. |
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76 |
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77 @return: The generated SDP string. |
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78 """ |
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79 contents = session["contents"] |
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80 sdp_lines = ["v=0"] |
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81 |
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82 # Add originator (o=) line after the version (v=) line |
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83 username = base64.b64encode(session["local_jid"].full().encode()).decode() |
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84 session_id = "1" # Increment this for each session |
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85 session_version = "1" # Increment this when the session is updated |
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86 network_type = "IN" |
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87 address_type = "IP4" |
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88 connection_address = "0.0.0.0" |
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89 o_line = ( |
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90 f"o={username} {session_id} {session_version} {network_type} {address_type} " |
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91 f"{connection_address}" |
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92 ) |
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93 sdp_lines.append(o_line) |
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94 |
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95 # Add the mandatory "s=" and t=" lines |
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96 sdp_lines.append("s=-") |
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97 sdp_lines.append("t=0 0") |
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98 |
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99 # stream direction |
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100 all_senders = {c["senders"] for c in session["contents"].values()} |
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101 # if we don't have a common senders for all contents, we set them at media level |
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102 senders = all_senders.pop() if len(all_senders) == 1 else None |
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103 |
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104 sdp_lines.append("a=msid-semantic:WMS *") |
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105 sdp_lines.append("a=ice-options:trickle") |
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106 |
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107 host.trigger.point( |
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108 "XEP-0167_generate_sdp_session", |
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109 session, |
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110 local, |
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111 sdp_lines, |
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112 triggers_no_cancel=True, |
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113 ) |
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114 content_names = sorted(contents) |
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115 |
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116 for content_name, content_data in [ |
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117 (n, contents[n]) for n in content_names |
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118 ]: # contents.items(): |
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119 app_data_key = "local_data" if local else "peer_data" |
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120 application_data = content_data["application_data"] |
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121 media_data = application_data[app_data_key] |
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122 media = application_data["media"] |
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123 payload_types = media_data.get("payload_types", {}) |
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124 |
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125 # Generate m= line |
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126 if media == "application": |
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127 transport = "UDP/DTLS/SCTP" |
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128 m_line = f"m={media} {port} {transport} webrtc-datachannel" |
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129 else: |
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130 transport = "UDP/TLS/RTP/SAVPF" |
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131 payload_type_ids = [str(pt_id) for pt_id in payload_types] |
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132 m_line = f"m={media} {port} {transport} {' '.join(payload_type_ids)}" |
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133 sdp_lines.append(m_line) |
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134 |
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135 sdp_lines.append(f"c={network_type} {address_type} {connection_address}") |
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136 |
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137 sdp_lines.append(f"a=mid:{content_name}") |
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138 if senders is not None: |
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139 sdp_lines.append(senders_to_sdp(senders, session)) |
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140 |
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141 # stream direction |
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142 if senders is None: |
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143 sdp_lines.append(senders_to_sdp(content_data["senders"], session)) |
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144 |
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145 # Generate a= lines for rtpmap and fmtp |
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146 for pt_id, pt in payload_types.items(): |
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147 name = pt["name"] |
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148 clockrate = pt.get("clockrate", "") |
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149 |
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150 # Check if "channels" is in pt and append it to the line |
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151 channels = pt.get("channels") |
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152 if channels: |
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153 sdp_lines.append(f"a=rtpmap:{pt_id} {name}/{clockrate}/{channels}") |
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154 else: |
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155 sdp_lines.append(f"a=rtpmap:{pt_id} {name}/{clockrate}") |
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156 |
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157 if "ptime" in pt: |
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158 sdp_lines.append(f"a=ptime:{pt['ptime']}") |
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159 |
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160 if "parameters" in pt: |
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161 fmtp_params = ";".join([f"{k}={v}" for k, v in pt["parameters"].items()]) |
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162 sdp_lines.append(f"a=fmtp:{pt_id} {fmtp_params}") |
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163 |
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164 if "bandwidth" in media_data: |
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165 sdp_lines.append(f"a=b:{media_data['bandwidth']}") |
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166 |
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167 if media_data.get("rtcp-mux"): |
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168 sdp_lines.append("a=rtcp-mux") |
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169 |
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170 # Generate a= lines for fingerprint, ICE ufrag, pwd and candidates |
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171 ice_data_key = "local_ice_data" if local else "peer_ice_data" |
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172 ice_data = content_data["transport_data"][ice_data_key] |
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173 |
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174 if "fingerprint" in ice_data: |
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175 fingerprint_data = ice_data["fingerprint"] |
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176 sdp_lines.append( |
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177 f"a=fingerprint:{fingerprint_data['hash']} " |
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178 f"{fingerprint_data['fingerprint']}" |
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179 ) |
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180 sdp_lines.append(f"a=setup:{fingerprint_data['setup']}") |
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181 |
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182 sdp_lines.append(f"a=ice-ufrag:{ice_data['ufrag']}") |
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183 sdp_lines.append(f"a=ice-pwd:{ice_data['pwd']}") |
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184 |
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185 for candidate in ice_data["candidates"]: |
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186 candidate_line = generate_candidate_line(candidate) |
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187 sdp_lines.append(f"a={candidate_line}") |
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188 |
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189 # Generate a= lines for encryption |
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190 if "encryption" in media_data: |
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191 for enc_data in media_data["encryption"]: |
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192 crypto_suite = enc_data["crypto-suite"] |
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193 key_params = enc_data["key-params"] |
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194 session_params = enc_data.get("session-params", "") |
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195 tag = enc_data["tag"] |
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196 |
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197 crypto_line = f"a=crypto:{tag} {crypto_suite} {key_params}" |
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198 if session_params: |
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199 crypto_line += f" {session_params}" |
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200 sdp_lines.append(crypto_line) |
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201 |
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202 host.trigger.point( |
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203 "XEP-0167_generate_sdp_content", |
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204 session, |
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205 local, |
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206 content_name, |
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207 content_data, |
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208 sdp_lines, |
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209 application_data, |
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210 app_data_key, |
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211 media_data, |
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212 media, |
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213 triggers_no_cancel=True, |
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214 ) |
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215 |
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216 # Combine SDP lines and return the result |
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217 return "\r\n".join(sdp_lines) + "\r\n" |
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218 |
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219 |
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220 def generate_candidate_line(candidate: dict) -> str: |
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221 """Generate a ``candidate:`` attribute line from candidate data. |
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222 |
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223 @param candidate: ICE candidate data. |
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224 @return ICE candidate attribute line. |
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225 """ |
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226 foundation = candidate["foundation"] |
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227 component_id = candidate["component_id"] |
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228 transport = candidate["transport"] |
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229 priority = candidate["priority"] |
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230 address = candidate["address"] |
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231 candidate_port = candidate["port"] |
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232 candidate_type = candidate["type"] |
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233 |
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234 candidate_line = ( |
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235 f"candidate:{foundation} {component_id} {transport} {priority} " |
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236 f"{address} {candidate_port} typ {candidate_type}" |
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237 ) |
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238 |
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239 if "rel_addr" in candidate and "rel_port" in candidate: |
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240 candidate_line += f" raddr {candidate['rel_addr']} rport {candidate['rel_port']}" |
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241 |
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242 if "generation" in candidate: |
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243 candidate_line += f" generation {candidate['generation']}" |
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244 |
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245 if "network" in candidate: |
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246 candidate_line += f" network {candidate['network']}" |
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247 |
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248 return candidate_line |
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249 |
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250 |
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251 def parse_candidate(parts: list[str]) -> dict: |
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252 """Parse parts of a ICE candidate |
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253 |
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254 @param parts: Parts of the candidate line. |
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255 @return: candidate data |
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256 """ |
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257 candidate = { |
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258 "foundation": parts[0], |
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259 "component_id": int(parts[1]), |
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260 "transport": parts[2], |
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261 "priority": int(parts[3]), |
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262 "address": parts[4], |
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263 "port": int(parts[5]), |
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264 "type": parts[7], |
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265 } |
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266 |
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267 for part in parts[8:]: |
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268 if part == "raddr": |
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269 candidate["rel_addr"] = parts[parts.index(part) + 1] |
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270 elif part == "rport": |
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271 candidate["rel_port"] = int(parts[parts.index(part) + 1]) |
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272 elif part == "generation": |
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273 candidate["generation"] = parts[parts.index(part) + 1] |
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274 elif part == "network": |
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275 candidate["network"] = parts[parts.index(part) + 1] |
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276 |
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277 return candidate |
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278 |
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279 |
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280 def parse_sdp(sdp: str, role: str) -> dict: |
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281 """Parse SDP string. |
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282 |
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283 @param sdp: The SDP string to parse. |
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284 @param role: Role of the entities which produces the SDP. |
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285 @return: A dictionary containing parsed session data. |
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286 """ |
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287 assert host is not None |
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288 lines = sdp.strip().split("\r\n") |
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289 metadata: Dict[str, Any] = {} |
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290 call_data = {"metadata": metadata} |
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291 session_attributes: Dict[str, Any] = {} |
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292 |
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293 media_type = None |
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294 media_data: Optional[Dict[str, Any]] = None |
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295 application_data: Optional[Dict[str, Any]] = None |
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296 transport_data: Optional[Dict[str, Any]] = None |
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297 fingerprint_data: Optional[Dict[str, str]] = None |
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298 ice_pwd: Optional[str] = None |
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299 ice_ufrag: Optional[str] = None |
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300 payload_types: Optional[Dict[int, dict]] = None |
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301 senders: str = "both" |
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302 |
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303 for line in lines: |
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304 try: |
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305 parts = line.split() |
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306 prefix = parts[0][:2] |
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307 parts[0] = parts[0][2:] |
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308 |
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309 if prefix == "m=": |
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310 media_type = parts[0] |
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311 port = int(parts[1]) |
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312 application_data = {"media": media_type} |
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313 if media_type in ("video", "audio"): |
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314 payload_types = application_data["payload_types"] = {} |
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315 for payload_type_id in [int(pt_id) for pt_id in parts[3:]]: |
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316 payload_type = {"id": payload_type_id} |
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317 payload_types[payload_type_id] = payload_type |
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318 elif media_type == "application": |
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319 if parts[3] != "webrtc-datachannel": |
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320 raise NotImplementedError( |
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321 f"{media_type!r} application is not supported" |
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322 ) |
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323 |
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324 transport_data = {"port": port} |
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325 if fingerprint_data is not None: |
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326 transport_data["fingerprint"] = fingerprint_data |
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327 if ice_pwd is not None: |
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328 transport_data["pwd"] = ice_pwd |
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329 if ice_ufrag is not None: |
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330 transport_data["ufrag"] = ice_ufrag |
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331 media_data = call_data[media_type] = { |
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332 "application_data": application_data, |
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333 "transport_data": transport_data, |
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334 "senders": senders, |
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335 } |
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336 |
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337 # Apply session attributes to the new media |
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338 for attr, value in session_attributes.items(): |
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339 if attr in ("fingerprint", "ice-pwd", "ice-ufrag"): |
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340 transport_data[attr] = value |
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341 elif attr in ("sendrecv", "sendonly", "recvonly", "inactive"): |
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342 application_data["senders"] = value |
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343 else: |
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344 application_data[attr] = value |
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345 |
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346 elif prefix == "a=": |
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347 if ":" in parts[0]: |
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348 attribute, parts[0] = parts[0].split(":", 1) |
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349 else: |
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350 attribute = parts[0] |
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351 |
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352 if media_type is None: |
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353 # This is a session-level attribute |
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354 if attribute == "fingerprint": |
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355 algorithm, fingerprint = parts[0], parts[1] |
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356 session_attributes["fingerprint"] = { |
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357 "hash": algorithm, |
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358 "fingerprint": fingerprint, |
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359 } |
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360 elif attribute == "ice-pwd": |
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361 session_attributes["ice-pwd"] = parts[0] |
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362 elif attribute == "ice-ufrag": |
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363 session_attributes["ice-ufrag"] = parts[0] |
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364 elif attribute in ("sendrecv", "sendonly", "recvonly", "inactive"): |
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365 if attribute == "sendrecv": |
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366 value = "both" |
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367 elif attribute == "sendonly": |
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368 value = role |
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369 elif attribute == "recvonly": |
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370 value = "responder" if role == "initiator" else "initiator" |
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371 else: |
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372 value = "none" |
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373 session_attributes[attribute] = value |
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374 else: |
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375 session_attributes[attribute] = parts[0] if parts else True |
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376 else: |
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377 # This is a media-level attribute |
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378 if attribute == "mid": |
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379 assert media_data is not None |
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380 try: |
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381 media_data["id"] = parts[0] |
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382 except IndexError: |
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383 log.warning(f"invalid media ID: {line}") |
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384 |
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385 elif attribute == "rtpmap": |
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386 assert application_data is not None |
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387 assert payload_types is not None |
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diff
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388 pt_id = int(parts[0]) |
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diff
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389 codec_info = parts[1].split("/") |
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diff
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390 codec = codec_info[0] |
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diff
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391 clockrate = int(codec_info[1]) |
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392 payload_type = { |
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393 "id": pt_id, |
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diff
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394 "name": codec, |
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395 "clockrate": clockrate, |
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396 } |
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397 if len(codec_info) > 2: |
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diff
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398 channels = int(codec_info[2]) |
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diff
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399 payload_type["channels"] = channels |
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400 |
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401 payload_types.setdefault(pt_id, {}).update(payload_type) |
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402 |
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403 elif attribute == "fmtp": |
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diff
changeset
|
404 assert payload_types is not None |
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diff
changeset
|
405 pt_id = int(parts[0]) |
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diff
changeset
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406 params = parts[1].split(";") |
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diff
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407 try: |
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diff
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408 payload_type = payload_types[pt_id] |
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diff
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409 except KeyError: |
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diff
changeset
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410 raise ValueError( |
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diff
changeset
|
411 f"Can find content type {pt_id}, ignoring: {line}" |
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diff
changeset
|
412 ) |
4056
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|
413 |
4289
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diff
changeset
|
414 try: |
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diff
changeset
|
415 payload_type["parameters"] = { |
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diff
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416 name: value |
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diff
changeset
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417 for name, value in (param.split("=") for param in params) |
33ecebb2c02f
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diff
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|
418 } |
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diff
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419 except ValueError: |
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diff
changeset
|
420 payload_type.setdefault("exra-parameters", []).extend(params) |
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diff
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|
421 |
4289
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diff
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422 elif attribute == "candidate": |
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diff
changeset
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423 assert transport_data is not None |
33ecebb2c02f
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diff
changeset
|
424 candidate = parse_candidate(parts) |
4056
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changeset
|
425 |
4289
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diff
changeset
|
426 transport_data.setdefault("candidates", []).append(candidate) |
4056
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diff
changeset
|
427 |
4289
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diff
changeset
|
428 elif attribute == "fingerprint": |
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diff
changeset
|
429 algorithm, fingerprint = parts[0], parts[1] |
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diff
changeset
|
430 fingerprint_data = {"hash": algorithm, "fingerprint": fingerprint} |
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diff
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|
431 if transport_data is not None: |
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diff
changeset
|
432 transport_data.setdefault("fingerprint", {}).update( |
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diff
changeset
|
433 fingerprint_data |
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diff
changeset
|
434 ) |
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diff
changeset
|
435 elif attribute == "setup": |
33ecebb2c02f
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diff
changeset
|
436 assert transport_data is not None |
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diff
changeset
|
437 setup = parts[0] |
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diff
changeset
|
438 transport_data.setdefault("fingerprint", {})["setup"] = setup |
4056
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changeset
|
439 |
4289
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440 elif attribute == "b": |
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changeset
|
441 assert application_data is not None |
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diff
changeset
|
442 bandwidth = int(parts[0]) |
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diff
changeset
|
443 application_data["bandwidth"] = bandwidth |
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|
444 |
4289
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445 elif attribute == "rtcp-mux": |
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diff
changeset
|
446 assert application_data is not None |
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diff
changeset
|
447 application_data["rtcp-mux"] = True |
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|
448 |
4289
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diff
changeset
|
449 elif attribute == "ice-ufrag": |
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parents:
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diff
changeset
|
450 if transport_data is not None: |
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diff
changeset
|
451 transport_data["ufrag"] = parts[0] |
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diff
changeset
|
452 |
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453 elif attribute == "ice-pwd": |
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454 if transport_data is not None: |
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455 transport_data["pwd"] = parts[0] |
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456 |
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457 elif attribute in ("sendrecv", "sendonly", "recvonly", "inactive"): |
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458 if attribute == "sendrecv": |
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459 value = "both" |
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460 elif attribute == "sendonly": |
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461 value = role |
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462 elif attribute == "recvonly": |
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463 value = "responder" if role == "initiator" else "initiator" |
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464 else: |
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465 value = "none" |
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466 |
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467 if application_data is None: |
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468 senders = value |
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469 else: |
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470 application_data["senders"] = value |
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471 |
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472 host.trigger.point( |
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473 "XEP-0167_parse_sdp_a", |
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474 attribute, |
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475 parts, |
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476 call_data, |
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477 metadata, |
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478 media_type, |
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479 application_data, |
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480 transport_data, |
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481 triggers_no_cancel=True, |
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482 ) |
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483 |
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484 except ValueError as e: |
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485 raise ValueError(f"Could not parse line. Invalid format ({e}): {line}") from e |
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486 except IndexError as e: |
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487 raise IndexError(f"Incomplete line. Missing data: {line}") from e |
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488 |
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489 # we remove private data (data starting with _, used by some plugins (e.g. XEP-0294) |
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490 # to handle session data at media level)) |
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491 for key in [k for k in call_data if k.startswith("_")]: |
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492 log.debug(f"cleaning remaining private data {key!r}") |
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493 del call_data[key] |
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494 |
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495 all_media = {k: v for k, v in call_data.items() if k in ("audio", "video")} |
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496 if len(all_media) > 1: |
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497 media_with_candidates = [ |
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498 m for m in all_media.values() if "candidates" in m["transport_data"] |
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499 ] |
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500 if len(media_with_candidates) == 1: |
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501 log.warning( |
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502 "SDP contains ICE candidates only for one media stream. This is non-standard behavior." |
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503 ) |
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504 |
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505 return call_data |
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506 |
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507 |
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508 def build_description(media: str, media_data: dict, session: dict) -> domish.Element: |
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509 """Generate <description> element from media data |
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510 |
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511 @param media: media type ("audio" or "video") |
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512 |
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513 @param media_data: A dictionary containing the media description data. |
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514 The keys and values are described below: |
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515 |
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516 - ssrc (str, optional): The synchronization source identifier. |
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517 - payload_types (list): A list of dictionaries, each representing a payload |
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518 type. |
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519 Each dictionary may contain the following keys: |
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520 - channels (str, optional): Number of audio channels. |
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521 - clockrate (str, optional): Clock rate of the media. |
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522 - id (str): The unique identifier of the payload type. |
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523 - maxptime (str, optional): Maximum packet time. |
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524 - name (str, optional): Name of the codec. |
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525 - ptime (str, optional): Preferred packet time. |
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526 - parameters (dict, optional): A dictionary of codec-specific parameters. |
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527 Key-value pairs represent the parameter name and value, respectively. |
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528 - bandwidth (str, optional): The bandwidth type. |
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529 - rtcp-mux (bool, optional): Indicates whether RTCP multiplexing is enabled or |
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530 not. |
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531 - encryption (list, optional): A list of dictionaries, each representing an |
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|
532 encryption method. |
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533 Each dictionary may contain the following keys: |
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534 - tag (str): The unique identifier of the encryption method. |
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535 - crypto-suite (str): The encryption suite in use. |
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536 - key-params (str): Key parameters for the encryption suite. |
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537 - session-params (str, optional): Session parameters for the encryption |
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|
538 suite. |
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|
539 |
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540 @return: A <description> element. |
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541 """ |
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542 # FIXME: to be removed once host is accessible from global var |
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|
543 assert host is not None |
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|
544 |
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|
545 desc_elt = domish.Element((NS_JINGLE_RTP, "description"), attribs={"media": media}) |
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|
546 |
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547 for pt_id, pt_data in media_data.get("payload_types", {}).items(): |
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|
548 payload_type_elt = desc_elt.addElement("payload-type") |
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|
549 payload_type_elt["id"] = str(pt_id) |
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|
550 for attr in ["channels", "clockrate", "maxptime", "name", "ptime"]: |
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|
551 if attr in pt_data: |
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|
552 payload_type_elt[attr] = str(pt_data[attr]) |
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|
553 |
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|
554 if "parameters" in pt_data: |
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parents:
diff
changeset
|
555 for param_name, param_value in pt_data["parameters"].items(): |
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parents:
diff
changeset
|
556 param_elt = payload_type_elt.addElement("parameter") |
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|
557 param_elt["name"] = param_name |
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|
558 param_elt["value"] = param_value |
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|
559 host.trigger.point( |
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parents:
diff
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|
560 "XEP-0167_build_description_payload_type", |
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561 desc_elt, |
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562 media_data, |
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563 pt_data, |
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564 payload_type_elt, |
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|
565 triggers_no_cancel=True, |
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|
566 ) |
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|
567 |
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parents:
diff
changeset
|
568 if "bandwidth" in media_data: |
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plugin XEP-0167: Jingle RTP Sessions implementation:
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parents:
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569 bandwidth_elt = desc_elt.addElement("bandwidth") |
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parents:
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570 bandwidth_elt["type"] = media_data["bandwidth"] |
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parents:
diff
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|
571 |
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parents:
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572 if media_data.get("rtcp-mux"): |
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parents:
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573 desc_elt.addElement("rtcp-mux") |
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parents:
diff
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|
574 |
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parents:
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575 # Add encryption element |
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Goffi <goffi@goffi.org>
parents:
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576 if "encryption" in media_data: |
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plugin XEP-0167: Jingle RTP Sessions implementation:
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parents:
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|
577 encryption_elt = desc_elt.addElement("encryption") |
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parents:
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|
578 # we always want require encryption if the `encryption` data is present |
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parents:
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579 encryption_elt["required"] = "1" |
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parents:
diff
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580 for enc_data in media_data["encryption"]: |
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parents:
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|
581 crypto_elt = encryption_elt.addElement("crypto") |
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plugin XEP-0167: Jingle RTP Sessions implementation:
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parents:
diff
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582 for attr in ["tag", "crypto-suite", "key-params", "session-params"]: |
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plugin XEP-0167: Jingle RTP Sessions implementation:
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parents:
diff
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583 if attr in enc_data: |
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plugin XEP-0167: Jingle RTP Sessions implementation:
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parents:
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|
584 crypto_elt[attr] = enc_data[attr] |
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parents:
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|
585 |
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parents:
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586 host.trigger.point( |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
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587 "XEP-0167_build_description", |
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parents:
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588 desc_elt, |
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parents:
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|
589 media_data, |
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590 session, |
4270
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591 triggers_no_cancel=True, |
4056
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|
592 ) |
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593 |
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parents:
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594 return desc_elt |
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|
595 |
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parents:
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596 |
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parents:
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597 def parse_description(desc_elt: domish.Element) -> dict: |
1c4f4aa36d98
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598 """Parse <desciption> to a dict |
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599 |
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600 @param desc_elt: <description> element |
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601 @return: media data as in [build_description] |
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Goffi <goffi@goffi.org>
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602 """ |
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603 # FIXME: to be removed once host is accessible from global var |
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parents:
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604 assert host is not None |
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parents:
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|
605 |
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parents:
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|
606 media_data = {} |
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parents:
diff
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|
607 if desc_elt.hasAttribute("ssrc"): |
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Goffi <goffi@goffi.org>
parents:
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608 media_data.setdefault("ssrc", {})[desc_elt["ssrc"]] = {} |
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
609 |
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plugin XEP-0167: Jingle RTP Sessions implementation:
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parents:
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|
610 payload_types = {} |
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plugin XEP-0167: Jingle RTP Sessions implementation:
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parents:
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|
611 for payload_type_elt in desc_elt.elements(NS_JINGLE_RTP, "payload-type"): |
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parents:
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|
612 payload_type_data = { |
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parents:
diff
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|
613 attr: payload_type_elt[attr] |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
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|
614 for attr in [ |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
615 "channels", |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
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|
616 "clockrate", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
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|
617 "maxptime", |
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
618 "name", |
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parents:
diff
changeset
|
619 "ptime", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
620 ] |
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plugin XEP-0167: Jingle RTP Sessions implementation:
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parents:
diff
changeset
|
621 if payload_type_elt.hasAttribute(attr) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
622 } |
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parents:
diff
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|
623 try: |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
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|
624 pt_id = int(payload_type_elt["id"]) |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
625 except KeyError: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
626 log.warning( |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
627 f"missing ID in payload type, ignoring: {payload_type_elt.toXml()}" |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
628 ) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
629 continue |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
630 |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
631 parameters = {} |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
632 for param_elt in payload_type_elt.elements(NS_JINGLE_RTP, "parameter"): |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
633 param_name = param_elt.getAttribute("name") |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
634 param_value = param_elt.getAttribute("value") |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
635 if not param_name or param_value is None: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
636 log.warning(f"invalid parameter: {param_elt.toXml()}") |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
637 continue |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
638 parameters[param_name] = param_value |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
639 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
640 if parameters: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
641 payload_type_data["parameters"] = parameters |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
642 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
643 host.trigger.point( |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
644 "XEP-0167_parse_description_payload_type", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
645 desc_elt, |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
646 media_data, |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
647 payload_type_elt, |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
648 payload_type_data, |
4270
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|
649 triggers_no_cancel=True, |
4056
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parents:
diff
changeset
|
650 ) |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
651 payload_types[pt_id] = payload_type_data |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
652 |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
653 # bandwidth |
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parents:
diff
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|
654 media_data["payload_types"] = payload_types |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
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parents:
diff
changeset
|
655 try: |
1c4f4aa36d98
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parents:
diff
changeset
|
656 bandwidth_elt = next(desc_elt.elements(NS_JINGLE_RTP, "bandwidth")) |
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parents:
diff
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|
657 except StopIteration: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
658 pass |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
659 else: |
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plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
660 bandwidth = bandwidth_elt.getAttribute("type") |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
661 if not bandwidth: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
662 log.warning(f"invalid bandwidth: {bandwidth_elt.toXml}") |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
663 else: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
664 media_data["bandwidth"] = bandwidth |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
665 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
666 # rtcp-mux |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
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|
667 rtcp_mux_elt = next(desc_elt.elements(NS_JINGLE_RTP, "rtcp-mux"), None) |
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parents:
diff
changeset
|
668 media_data["rtcp-mux"] = rtcp_mux_elt is not None |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
669 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
670 # Encryption |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
671 encryption_data = [] |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
672 encryption_elt = next(desc_elt.elements(NS_JINGLE_RTP, "encryption"), None) |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
673 if encryption_elt: |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
674 media_data["encryption_required"] = C.bool( |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
675 encryption_elt.getAttribute("required", C.BOOL_FALSE) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
676 ) |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
677 |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
678 for crypto_elt in encryption_elt.elements(NS_JINGLE_RTP, "crypto"): |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
679 crypto_data = { |
1c4f4aa36d98
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Goffi <goffi@goffi.org>
parents:
diff
changeset
|
680 attr: crypto_elt[attr] |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
681 for attr in [ |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
682 "crypto-suite", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
683 "key-params", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
684 "session-params", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
diff
changeset
|
685 "tag", |
1c4f4aa36d98
plugin XEP-0167: Jingle RTP Sessions implementation:
Goffi <goffi@goffi.org>
parents:
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686 ] |
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plugin XEP-0167: Jingle RTP Sessions implementation:
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687 if crypto_elt.hasAttribute(attr) |
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688 } |
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689 encryption_data.append(crypto_data) |
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690 |
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691 if encryption_data: |
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plugin XEP-0167: Jingle RTP Sessions implementation:
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692 media_data["encryption"] = encryption_data |
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Goffi <goffi@goffi.org>
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693 |
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694 host.trigger.point( |
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Reformatted code base using black.
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695 "XEP-0167_parse_description", desc_elt, media_data, triggers_no_cancel=True |
4056
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Goffi <goffi@goffi.org>
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696 ) |
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Goffi <goffi@goffi.org>
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697 |
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698 return media_data |