Mercurial > libervia-backend

annotate libervia/backend/plugins/plugin_xep_0339.py @ 4118:07370d2a9bde

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plugin XEP-0167: keep media order when starting a call: media content order is relevant when building Jingle contents/SDP notably for bundling. This patch fixes the previous behaviour of always using the same order by keeping the order of the data (i.e. order of original SDP offer). Previous behaviour could lead to call failure. rel 424
author Goffi <goffi@goffi.org>
date Tue, 03 Oct 2023 15:15:24 +0200
parents 4b842c1fb686
children 0d7bb4df2343
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4067
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
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1 #!/usr/bin/env python3
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2
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3 # Libervia plugin
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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
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
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19 from typing import List
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20
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21 from twisted.words.protocols.jabber.xmlstream import XMPPHandler
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22 from twisted.words.xish import domish
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23 from wokkel import disco, iwokkel
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24 from zope.interface import implementer
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25
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26 from libervia.backend.core import exceptions
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27 from libervia.backend.core.constants import Const as C
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28 from libervia.backend.core.core_types import SatXMPPEntity
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29 from libervia.backend.core.i18n import _
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30 from libervia.backend.core.log import getLogger
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31 from libervia.backend.tools import xml_tools
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32
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33 log = getLogger(__name__)
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34
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35 NS_JINGLE_RTP_SSMA = "urn:xmpp:jingle:apps:rtp:ssma:0"
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36
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
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37 PLUGIN_INFO = {
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38 C.PI_NAME: "Source-Specific Media Attributes in Jingle",
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39 C.PI_IMPORT_NAME: "XEP-0339",
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40 C.PI_TYPE: "XEP",
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41 C.PI_MODES: C.PLUG_MODE_BOTH,
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42 C.PI_PROTOCOLS: ["XEP-0339"],
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43 C.PI_DEPENDENCIES: ["XEP-0092", "XEP-0167"],
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44 C.PI_RECOMMENDATIONS: [],
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45 C.PI_MAIN: "XEP_0339",
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46 C.PI_HANDLER: "yes",
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47 C.PI_DESCRIPTION: _("""Source-Specific Media Attributes in Jingle"""),
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48 }
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49
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
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50
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
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51 class XEP_0339:
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52 def __init__(self, host):
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53 log.info(f"plugin {PLUGIN_INFO[C.PI_NAME]!r} initialization")
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54 self.host = host
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55 host.trigger.add("XEP-0167_parse_sdp_a", self._parse_sdp_a_trigger)
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56 host.trigger.add(
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57 "XEP-0167_generate_sdp_content", self._generate_sdp_content_trigger
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58 )
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59 host.trigger.add("XEP-0167_parse_description", self._parse_description_trigger)
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60 host.trigger.add("XEP-0167_build_description", self._build_description_trigger)
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61
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62 def get_handler(self, client):
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63 return XEP_0339_handler()
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64
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65 def _parse_sdp_a_trigger(
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66 self,
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67 attribute: str,
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68 parts: List[str],
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69 call_data: dict,
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70 metadata: dict,
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71 media_type: str,
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72 application_data: dict,
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73 transport_data: dict,
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74 ) -> None:
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75 """Parse "ssrc" attributes"""
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76 if attribute == "ssrc":
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77 assert application_data is not None
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78 ssrc_id = int(parts[0])
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79
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80 if len(parts) > 1:
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81 name, *values = " ".join(parts[1:]).split(":", 1)
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82 if values:
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83 value = values[0] or None
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84 else:
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85 value = None
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86 application_data.setdefault("ssrc", {}).setdefault(ssrc_id, {})[
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87 name
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88 ] = value
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89 else:
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90 log.warning(f"no attribute in ssrc: {' '.join(parts)}")
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91 application_data.setdefault("ssrc", {}).setdefault(ssrc_id, {})
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92 elif attribute == "ssrc-group":
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93 assert application_data is not None
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94 semantics, *ssrc_ids = parts
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95 ssrc_ids = [int(ssrc_id) for ssrc_id in ssrc_ids]
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96 application_data.setdefault("ssrc-group", {})[semantics] = ssrc_ids
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97 elif attribute == "msid":
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98 assert application_data is not None
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99 application_data["msid"] = " ".join(parts)
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100
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101
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102 def _generate_sdp_content_trigger(
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103 self,
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104 session: dict,
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105 local: bool,
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106 idx: int,
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107 content_data: dict,
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108 sdp_lines: List[str],
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109 application_data: dict,
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110 app_data_key: str,
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111 media_data: dict,
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112 media: str
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113 ) -> None:
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114 """Generate "msid" and "ssrc" attributes"""
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115 if "msid" in media_data:
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116 sdp_lines.append(f"a=msid:{media_data['msid']}")
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117
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diff changeset
118 ssrc_data = media_data.get("ssrc", {})
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
119 ssrc_group_data = media_data.get("ssrc-group", {})
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
120
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
121 for ssrc_id, attributes in ssrc_data.items():
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
122 if not attributes:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
123 # there are no attributes for this SSRC ID, we add a simple line with only
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
124 # the SSRC ID
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
125 sdp_lines.append(f"a=ssrc:{ssrc_id}")
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
126 else:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
127 for attr_name, attr_value in attributes.items():
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
128 if attr_value is not None:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
129 sdp_lines.append(f"a=ssrc:{ssrc_id} {attr_name}:{attr_value}")
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
130 else:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
131 sdp_lines.append(f"a=ssrc:{ssrc_id} {attr_name}")
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
132 for semantics, ssrc_ids in ssrc_group_data.items():
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
133 ssrc_lines = " ".join(str(ssrc_id) for ssrc_id in ssrc_ids)
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
134 sdp_lines.append(f"a=ssrc-group:{semantics} {ssrc_lines}")
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
135
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
136 def _parse_description_trigger(
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
137 self, desc_elt: domish.Element, media_data: dict
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
138 ) -> bool:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
139 """Parse the <source> and <ssrc-group> elements"""
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
140 for source_elt in desc_elt.elements(NS_JINGLE_RTP_SSMA, "source"):
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
141 try:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
142 ssrc_id = int(source_elt["ssrc"])
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
143 media_data.setdefault("ssrc", {})[ssrc_id] = {}
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
144 for param_elt in source_elt.elements(NS_JINGLE_RTP_SSMA, "parameter"):
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
145 name = param_elt["name"]
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
146 value = param_elt.getAttribute("value")
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
147 media_data["ssrc"][ssrc_id][name] = value
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
148 if name == "msid" and "msid" not in media_data:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
149 media_data["msid"] = value
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
150 except (KeyError, ValueError) as e:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
151 log.warning(f"Error while parsing <source>: {e}\n{source_elt.toXml()}")
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
152
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
153 for ssrc_group_elt in desc_elt.elements(NS_JINGLE_RTP_SSMA, "ssrc-group"):
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
154 try:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
155 semantics = ssrc_group_elt["semantics"]
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
156 semantic_ids = media_data.setdefault("ssrc-group", {})[semantics] = []
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
157 for source_elt in ssrc_group_elt.elements(NS_JINGLE_RTP_SSMA, "source"):
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
158 semantic_ids.append(
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
159 int(source_elt["ssrc"])
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
160 )
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
161 except (KeyError, ValueError) as e:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
162 log.warning(
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
163 f"Error while parsing <ssrc-group>: {e}\n{ssrc_group_elt.toXml()}"
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
164 )
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
165
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
166 return True
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
167
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
168 def _build_description_trigger(
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
169 self, desc_elt: domish.Element, media_data: dict, session: dict
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
170 ) -> bool:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
171 """Build the <source> and <ssrc-group> elements if possible"""
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
172 for ssrc_id, parameters in media_data.get("ssrc", {}).items():
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
173 if "msid" not in parameters and "msid" in media_data:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
174 parameters["msid"] = media_data["msid"]
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
175 source_elt = desc_elt.addElement((NS_JINGLE_RTP_SSMA, "source"))
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
176 source_elt["ssrc"] = str(ssrc_id)
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
177 for name, value in parameters.items():
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
178 param_elt = source_elt.addElement((NS_JINGLE_RTP_SSMA, "parameter"))
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
179 param_elt["name"] = name
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
180 if value is not None:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
181 param_elt["value"] = value
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
182
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
183 for semantics, ssrc_ids in media_data.get("ssrc-group", {}).items():
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
184 ssrc_group_elt = desc_elt.addElement((NS_JINGLE_RTP_SSMA, "ssrc-group"))
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
185 ssrc_group_elt["semantics"] = semantics
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
186 for ssrc_id in ssrc_ids:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
187 source_elt = ssrc_group_elt.addElement((NS_JINGLE_RTP_SSMA, "source"))
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
188 source_elt["ssrc"] = str(ssrc_id)
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
189
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
190 return True
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
191
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
192
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
193 @implementer(iwokkel.IDisco)
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
194 class XEP_0339_handler(XMPPHandler):
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
195 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
196 return [disco.DiscoFeature(NS_JINGLE_RTP_SSMA)]
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
197
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
198 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
199 return []