58 lines
2.0 KiB
Python
58 lines
2.0 KiB
Python
# mautrix-instagram - A Matrix-Instagram puppeting bridge.
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# Copyright (C) 2020 Tulir Asokan
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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import struct
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import paho.mqtt.client
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class MQTToTClient(paho.mqtt.client.Client):
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# This is equivalent to the original _send_connect, except:
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# * the protocol ID is MQTToT.
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# * the client ID is sent without a length.
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# * all extra stuff like wills, usernames, passwords and MQTTv5 is removed.
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def _send_connect(self, keepalive):
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proto_ver = self._protocol
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protocol = b"MQTToT"
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remaining_length = 2 + len(protocol) + 1 + 1 + 2 + len(self._client_id)
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# Username, password, clean session
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connect_flags = 0x80 + 0x40 + 0x02
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command = paho.mqtt.client.CONNECT
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packet = bytearray()
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packet.append(command)
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self._pack_remaining_length(packet, remaining_length)
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packet.extend(
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struct.pack(
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f"!H{len(protocol)}sBBH",
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len(protocol),
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protocol,
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proto_ver,
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connect_flags,
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keepalive,
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)
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)
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packet.extend(self._client_id)
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self._keepalive = keepalive
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self._easy_log(
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paho.mqtt.client.MQTT_LOG_DEBUG,
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"Sending CONNECT",
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)
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return self._packet_queue(command, packet, 0, 0)
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