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annotate libervia/backend/plugins/plugin_xep_0339.py @ 4306:94e0968987cd

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plugin XEP-0033: code modernisation, improve delivery, data validation: - Code has been rewritten using Pydantic models and `async` coroutines for data validation and cleaner element parsing/generation. - Delivery has been completely rewritten. It now works even if server doesn't support multicast, and send to local multicast service first. Delivering to local multicast service first is due to bad support of XEP-0033 in server (notably Prosody which has an incomplete implementation), and the current impossibility to detect if a sub-domain service handles fully multicast or only for local domains. This is a workaround to have a good balance between backward compatilibity and use of bandwith, and to make it work with the incoming email gateway implementation (the gateway will only deliver to entities of its own domain). - disco feature checking now uses `async` corountines. `host` implementation still use Deferred return values for compatibility with legacy code. rel 450
author Goffi <goffi@goffi.org>
date Thu, 26 Sep 2024 16:12:01 +0200
parents 0d7bb4df2343
children
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3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
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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
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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 def _generate_sdp_content_trigger(
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102 self,
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103 session: dict,
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104 local: bool,
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105 idx: int,
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106 content_data: dict,
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107 sdp_lines: List[str],
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108 application_data: dict,
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109 app_data_key: str,
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110 media_data: dict,
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111 media: str,
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112 ) -> None:
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113 """Generate "msid" and "ssrc" attributes"""
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114 if "msid" in media_data:
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115 sdp_lines.append(f"a=msid:{media_data['msid']}")
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diff changeset
116
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
117 ssrc_data = media_data.get("ssrc", {})
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
118 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
119
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
120 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
121 if not attributes:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
122 # 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
123 # the SSRC ID
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
124 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
125 else:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
126 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
127 if attr_value is not None:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
128 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
129 else:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
130 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
131 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
132 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
133 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
134
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
135 def _parse_description_trigger(
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
136 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
137 ) -> bool:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
138 """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
139 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
140 try:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
141 ssrc_id = int(source_elt["ssrc"])
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
142 media_data.setdefault("ssrc", {})[ssrc_id] = {}
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
143 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
144 name = param_elt["name"]
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
145 value = param_elt.getAttribute("value")
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
146 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
147 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
148 media_data["msid"] = value
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
149 except (KeyError, ValueError) as e:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
150 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
151
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
152 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
153 try:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
154 semantics = ssrc_group_elt["semantics"]
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
155 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
156 for source_elt in ssrc_group_elt.elements(NS_JINGLE_RTP_SSMA, "source"):
4270
0d7bb4df2343 Reformatted code base using black.
Goffi <goffi@goffi.org>
parents: 4071
diff changeset
157 semantic_ids.append(int(source_elt["ssrc"]))
4067
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
158 except (KeyError, ValueError) as e:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
159 log.warning(
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
160 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
161 )
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
162
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
163 return True
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 def _build_description_trigger(
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
166 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
167 ) -> bool:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
168 """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
169 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
170 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
171 parameters["msid"] = media_data["msid"]
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
172 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
173 source_elt["ssrc"] = str(ssrc_id)
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
174 for name, value in parameters.items():
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
175 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
176 param_elt["name"] = name
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
177 if value is not None:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
178 param_elt["value"] = value
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
179
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
180 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
181 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
182 ssrc_group_elt["semantics"] = semantics
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
183 for ssrc_id in ssrc_ids:
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
184 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
185 source_elt["ssrc"] = str(ssrc_id)
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
186
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
187 return True
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
188
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 @implementer(iwokkel.IDisco)
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
191 class XEP_0339_handler(XMPPHandler):
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
192 def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
193 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
194
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
195 def getDiscoItems(self, requestor, target, nodeIdentifier=""):
3f62c2445df1 plugin XEP-0339: "Source-Specific Media Attributes in Jingle" implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
196 return []