456 lines
22 KiB
Python
456 lines
22 KiB
Python
import json
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from bitstring import BitArray
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import asyncio
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import struct
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import time
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import os
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import audioop
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from vocoder_engine import VocoderEngine
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from openbridge_protocol import crea_pacchetto_ping, calcola_hmac
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from dmr_utils3.ambe_utils import convert49BitTo72BitAMBE, convert72BitTo49BitAMBE
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# ====================================================================
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# CARICAMENTO CONFIGURAZIONI (JSON)
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# ====================================================================
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def carica_config():
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try:
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with open("config.json", "r") as f:
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return json.load(f)
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except Exception as e:
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print(f"[ERRORE CRITICO] File config.json non trovato o errato ({e}). Chiusura.")
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exit(1)
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CONFIG = carica_config()
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HBLINK_IP = CONFIG.get("hblink_ip", "127.0.0.1")
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HBLINK_PORT = CONFIG.get("hblink_port", 62047)
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HBLINK_PASSWORD = CONFIG.get("hblink_password", "TestVOIP")
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PEER_ID = CONFIG.get("peer_id", 22241)
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SIP_PORT = CONFIG.get("sip_port", 55060)
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RTP_PORT = CONFIG.get("rtp_port", 10000)
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FREEPBX_IP = CONFIG.get("freepbx_ip", "127.0.0.1")
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def carica_rubrica():
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try:
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with open("utenti.json", "r") as f:
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return json.load(f)
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except Exception as e:
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return {}
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UTENTI_SIP_DMR = carica_rubrica()
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class SessioneSIP:
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def __init__(self, call_id, chiamante, destinatario_tg, rtp_addr, sip_addr, full_from, full_to, ip_vps):
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self.call_id = call_id
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self.chiamante = chiamante
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self.tg_destinazione = str(destinatario_tg)
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self.dmr_id = int(UTENTI_SIP_DMR.get(str(chiamante), 2223619))
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self.rtp_client_addr = rtp_addr
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self.sip_client_addr = sip_addr
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self.ip_vps = ip_vps
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self.rtp_seq = 0
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self.rtp_timestamp = 0
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self.rtp_confermato = False
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self.dialog_to = full_from
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self.dialog_from = full_to.split(';')[0] + ";tag=987654"
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self.local_cseq = 10
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self.ptt_attivo = False
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self.buffer_ambe = []
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self.seq_dmr = 0
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self.stream_id = os.urandom(4)
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self.ultimo_src_id = None
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self.dtmf_buffer = ""
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self.dtmf_task = None
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self.ultimo_rtp_timestamp_dtmf = None
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self.ultimo_tempo_rtp_dtmf = 0
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self.ultimo_evento_dtmf = None
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class OpenBridgeClient(asyncio.DatagramProtocol):
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def __init__(self, manager):
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self.transport = None
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self.manager = manager
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def connection_made(self, transport):
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self.transport = transport
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print(f"[OpenBridge] Socket connesso a {HBLINK_IP}:{HBLINK_PORT}")
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asyncio.create_task(self.keepalive_loop())
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def datagram_received(self, data, addr):
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if len(data) < 53: return
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if data.startswith(b"DMRD") and len(data) >= 73:
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src_id = int.from_bytes(data[5:8], 'big')
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tg_arrivo = str(int.from_bytes(data[8:11], 'big'))
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sessioni_interessate = [s for s in self.manager.sessioni.values() if s.tg_destinazione == tg_arrivo]
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if not sessioni_interessate: return
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print("D", end="", flush=True)
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payload_33 = data[20:53]
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ambe1 = payload_33[0:9]
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ambe2 = bytearray(9)
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ambe2[0:4] = payload_33[9:13]
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ambe2[4] = (payload_33[13] & 0xF0) | (payload_33[19] & 0x0F)
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ambe2[5:9] = payload_33[20:24]
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ambe3 = payload_33[24:33]
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frame_uniti = ambe1 + bytes(ambe2) + ambe3
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self.manager.ricevi_frame_dmr_multi(frame_uniti, sessioni_interessate, src_id)
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async def keepalive_loop(self):
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while True:
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if self.transport:
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pacchetto_ping = crea_pacchetto_ping(PEER_ID, HBLINK_PASSWORD)
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self.transport.sendto(pacchetto_ping)
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await asyncio.sleep(10)
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def apri_flusso_chiamata(self, sess):
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if not self.transport: return
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flags = 0
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payload_base = struct.pack("!3sB I 4s B I I", b"OPB", 0x80, PEER_ID, sess.stream_id, flags, sess.dmr_id, int(sess.tg_destinazione))
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firma_hmac = calcola_hmac(HBLINK_PASSWORD, payload_base)
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self.transport.sendto(payload_base + firma_hmac)
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def invia_dmrd_voce(self, sess, payload_ambe):
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if not self.transport: return
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try:
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magic = b"DMRD"
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seq_byte = struct.pack("B", sess.seq_dmr)
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src_bytes = sess.dmr_id.to_bytes(3, 'big')
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dst_bytes = int(sess.tg_destinazione).to_bytes(3, 'big')
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peer_bytes = PEER_ID.to_bytes(4, 'big')
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flags_byte = struct.pack("B", 0x00)
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header = magic + seq_byte + src_bytes + dst_bytes + peer_bytes + flags_byte + sess.stream_id
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payload_ambe = payload_ambe.ljust(27, b'\x00')
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ambe1 = payload_ambe[0:9]
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ambe2 = payload_ambe[9:18]
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ambe3 = payload_ambe[18:27]
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payload_33 = bytearray(33)
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payload_33[0:9] = ambe1
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payload_33[9:13] = ambe2[0:4]
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payload_33[13] = ambe2[4] & 0xF0
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payload_33[19] = ambe2[4] & 0x0F
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payload_33[20:24] = ambe2[5:9]
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payload_33[24:33] = ambe3
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pacchetto_base = header + bytes(payload_33)
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firma_hmac = calcola_hmac(HBLINK_PASSWORD, pacchetto_base)
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self.transport.sendto(pacchetto_base + firma_hmac)
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except Exception:
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pass
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def chiudi_flusso_chiamata(self, sess):
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if not self.transport: return
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magic = b"DMRD"
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flags_byte = struct.pack("B", 0x02)
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src_bytes = sess.dmr_id.to_bytes(3, 'big')
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dst_bytes = int(sess.tg_destinazione).to_bytes(3, 'big')
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peer_bytes = PEER_ID.to_bytes(4, 'big')
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for i in range(3):
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seq_byte = struct.pack("B", (sess.seq_dmr + i) % 256)
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header = magic + seq_byte + src_bytes + dst_bytes + peer_bytes + flags_byte + sess.stream_id
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pacchetto_base = header + (b'\x00' * 33)
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firma_hmac = calcola_hmac(HBLINK_PASSWORD, pacchetto_base)
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self.transport.sendto(pacchetto_base + firma_hmac)
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class SessionManager:
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def __init__(self):
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self.vocoder = VocoderEngine()
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self.openbridge = None
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self.rtp_transport = None
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self.sip_transport = None
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self.sessioni = {}
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async def avvia(self):
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await self.vocoder.avvia()
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loop = asyncio.get_running_loop()
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_, self.openbridge = await loop.create_datagram_endpoint(
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lambda: OpenBridgeClient(self),
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local_addr=('0.0.0.0', HBLINK_PORT),
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remote_addr=(HBLINK_IP, HBLINK_PORT)
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)
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print(f"[Core] PBX Multi-Utente avviato. SIP su porta {SIP_PORT}...\n")
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def trova_sessione_per_rtp(self, addr):
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for sess in self.sessioni.values():
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if sess.rtp_confermato and sess.rtp_client_addr == addr: return sess
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for sess in self.sessioni.values():
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if not sess.rtp_confermato and sess.rtp_client_addr == addr:
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sess.rtp_confermato = True; return sess
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non_confermate = [s for s in self.sessioni.values() if s.rtp_client_addr and s.rtp_client_addr[0] == addr[0] and not s.rtp_confermato]
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if non_confermate:
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sess = non_confermate[0]
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sess.rtp_client_addr = addr
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sess.rtp_confermato = True
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return sess
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return None
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def gestisci_nuova_chiamata(self, call_id, chiamante, destinatario, rtp_addr, sip_addr, full_from, full_to, ip_vps):
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sess = SessioneSIP(call_id, chiamante, destinatario, rtp_addr, sip_addr, full_from, full_to, ip_vps)
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self.sessioni[call_id] = sess
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print(f"\n[Core] >>> SIP {chiamante} -> TG {destinatario}")
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def termina_chiamata(self, call_id):
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if call_id in self.sessioni:
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sess = self.sessioni[call_id]
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if sess.ptt_attivo and self.openbridge:
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self.openbridge.chiudi_flusso_chiamata(sess)
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self.vocoder.rilascia_porta(f"SIP_{call_id}")
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del self.sessioni[call_id]
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def gestisci_ptt(self, sess, stato):
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if stato is True and not sess.ptt_attivo:
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sess.ptt_attivo = True
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sess.buffer_ambe = []
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sess.seq_dmr = 0
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sess.stream_id = os.urandom(4)
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if self.openbridge: self.openbridge.apri_flusso_chiamata(sess)
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elif stato is False and sess.ptt_attivo:
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sess.ptt_attivo = False
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if self.openbridge: self.openbridge.chiudi_flusso_chiamata(sess)
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def gestisci_dtmf_digit(self, sess, digit):
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if sess.ptt_attivo: return
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sess.dtmf_buffer += str(digit)
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if sess.dtmf_task: sess.dtmf_task.cancel()
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sess.dtmf_task = asyncio.create_task(self.attendi_cambio_tg(sess))
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async def attendi_cambio_tg(self, sess):
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try:
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await asyncio.sleep(2.5)
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if sess.dtmf_buffer:
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nuovo_tg = sess.dtmf_buffer
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sess.dtmf_buffer = ""
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print(f"\n[Core] *** CAMBIO TG: {sess.chiamante} è passato al Talkgroup {nuovo_tg} ***")
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sess.tg_destinazione = nuovo_tg
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self.notifica_display(sess, f"TG: {nuovo_tg}")
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except asyncio.CancelledError: pass
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def notifica_display(self, sess, testo_display):
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if not self.sip_transport or not sess.sip_client_addr: return
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sess.local_cseq += 1
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branch = f"z9hG4bK-{os.urandom(4).hex()}"
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client_sip_ip, client_sip_port = sess.sip_client_addr
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sdp = (f"v=0\r\no=- 12345 12345 IN IP4 {sess.ip_vps}\r\ns=Talk\r\n"
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f"c=IN IP4 {sess.ip_vps}\r\nt=0 0\r\nm=audio {RTP_PORT} RTP/AVP 8 101\r\n"
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f"a=rtpmap:8 PCMA/8000\r\na=rtpmap:101 telephone-event/8000\r\na=sendrecv\r\n")
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sip_reinvite = (
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f"INVITE sip:{sess.chiamante}@{client_sip_ip}:{client_sip_port} SIP/2.0\r\n"
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f"Via: SIP/2.0/UDP 127.0.0.1:{SIP_PORT};branch={branch}\r\n"
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f"Max-Forwards: 70\r\nFrom: {sess.dialog_from}\r\nTo: {sess.dialog_to}\r\n"
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f"Call-ID: {sess.call_id}\r\nCSeq: {sess.local_cseq} INVITE\r\n"
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f"Contact: <sip:gateway@127.0.0.1:{SIP_PORT}>\r\n"
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f"Remote-Party-ID: \"{testo_display}\" <sip:{sess.tg_destinazione}@{sess.ip_vps}>;party=called;screen=yes;privacy=off\r\n"
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f"P-Asserted-Identity: \"{testo_display}\" <sip:{sess.tg_destinazione}@{sess.ip_vps}>\r\n"
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f"Content-Type: application/sdp\r\nContent-Length: {len(sdp)}\r\n\r\n{sdp}")
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self.sip_transport.sendto(sip_reinvite.encode('utf-8'), sess.sip_client_addr)
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def ricevi_frame_dmr_multi(self, ambe_frames, sessioni_interessate, src_id):
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ascoltatori = [s for s in sessioni_interessate if not s.ptt_attivo]
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if not ascoltatori or not self.rtp_transport: return
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for sess in ascoltatori:
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if sess.ultimo_src_id != src_id:
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sess.ultimo_src_id = src_id
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self.notifica_display(sess, f"CID:{src_id}")
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asyncio.create_task(self.processa_audio_dmr(ambe_frames, ascoltatori))
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async def processa_audio_dmr(self, ambe_27_bytes, ascoltatori):
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if not ascoltatori: return
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tg_arrivo = ascoltatori[0].tg_destinazione
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try:
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frames_pcm = []
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for i in range(0, len(ambe_27_bytes), 9):
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frame_9 = ambe_27_bytes[i:i+9]
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if len(frame_9) < 9: continue
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try:
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ambe_49_bits = convert72BitTo49BitAMBE(BitArray(bytes=frame_9))
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ba_49 = ambe_49_bits if isinstance(ambe_49_bits, BitArray) else BitArray(ambe_49_bits)
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if len(ba_49) < 56: ba_49.append(BitArray(uint=0, length=56 - len(ba_49)))
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frame_7 = ba_49.bytes[:7]
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except Exception: continue
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pcm_data = await self.vocoder.converti_ambe_in_pcm(f"TG_{tg_arrivo}", frame_7)
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if pcm_data and len(pcm_data) >= 2:
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if len(pcm_data) % 2 != 0: pcm_data = pcm_data[:-1]
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# --- INIZIO AGC DMR -> SIP ---
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livello_rms = audioop.rms(pcm_data, 2)
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if livello_rms > 18000:
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pcm_data = audioop.mul(pcm_data, 2, 0.4)
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elif livello_rms > 12000:
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pcm_data = audioop.mul(pcm_data, 2, 0.7)
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elif livello_rms < 300:
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pcm_data = audioop.mul(pcm_data, 2, 0.0)
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# --- FINE AGC ---
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pcma_data = audioop.lin2alaw(pcm_data, 2)
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frames_pcm.append(pcma_data)
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for idx, pcma_data in enumerate(frames_pcm):
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for sess in ascoltatori:
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header = bytearray(12)
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header[0] = 0x80; header[1] = 0x08
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header[2:4] = struct.pack("!H", sess.rtp_seq)
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header[4:8] = struct.pack("!I", sess.rtp_timestamp)
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header[8:12] = struct.pack("!I", 0x12345678)
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rtp_packet = header + pcma_data
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if sess.rtp_client_addr:
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self.rtp_transport.sendto(rtp_packet, sess.rtp_client_addr)
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sess.rtp_seq = (sess.rtp_seq + 1) % 65536
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sess.rtp_timestamp = (sess.rtp_timestamp + 160) % 4294967296
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if idx < len(frames_pcm) - 1:
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await asyncio.sleep(0.019)
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except Exception: pass
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async def processa_audio_rtp(self, sess, rtp_payload):
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if not sess.ptt_attivo: return
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try:
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# --- INIZIO AGC SIP -> DMR ---
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# Decodifichiamo G.711a in PCM lineare temporaneamente per calcolare il volume
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pcm_lineare = audioop.alaw2lin(rtp_payload, 2)
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livello_rms = audioop.rms(pcm_lineare, 2)
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if livello_rms > 18000:
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pcm_lineare = audioop.mul(pcm_lineare, 2, 0.4)
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elif livello_rms > 12000:
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pcm_lineare = audioop.mul(pcm_lineare, 2, 0.7)
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elif livello_rms > 500 and livello_rms < 3000:
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# Piccolo booster se il microfono SIP è basso
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pcm_lineare = audioop.mul(pcm_lineare, 2, 1.5)
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elif livello_rms < 150:
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# Noise gate
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pcm_lineare = audioop.mul(pcm_lineare, 2, 0.0)
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# Ricodifichiamo in formato PCMA/A-Law prima di passarlo al vocoder
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rtp_payload = audioop.lin2alaw(pcm_lineare, 2)
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# --- FINE AGC ---
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ambe_bytes = await asyncio.wait_for(
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self.vocoder.converti_rtp_in_ambe(f"SIP_{sess.call_id}", rtp_payload), timeout=0.1
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)
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if not ambe_bytes: return
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dim_frame = 7 if len(ambe_bytes) % 7 == 0 else 9
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for i in range(0, len(ambe_bytes), dim_frame):
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frame = ambe_bytes[i:i+dim_frame]
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if len(frame) == 7:
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stringa_bit = BitArray(bytes=frame).bin
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ambe_49_bits = [int(b) for b in stringa_bit[:49]]
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fec_9_byte = convert49BitTo72BitAMBE(ambe_49_bits)
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sess.buffer_ambe.append(bytes(fec_9_byte))
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elif len(frame) == 9:
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sess.buffer_ambe.append(frame)
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while len(sess.buffer_ambe) >= 3:
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payload_vocale = b''.join(sess.buffer_ambe[:3])
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sess.buffer_ambe = sess.buffer_ambe[3:]
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self.openbridge.invia_dmrd_voce(sess, payload_vocale)
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sess.seq_dmr = (sess.seq_dmr + 1) % 256
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except Exception: pass
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class RtpProtocol(asyncio.DatagramProtocol):
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def __init__(self, manager): self.manager = manager
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def connection_made(self, transport): self.manager.rtp_transport = transport
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def datagram_received(self, data, addr):
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sess = self.manager.trova_sessione_per_rtp(addr)
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if not sess or len(data) < 12: return
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payload_type = data[1] & 0x7F
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if payload_type == 8:
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asyncio.create_task(self.manager.processa_audio_rtp(sess, data[12:]))
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elif payload_type == 101:
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ora = time.time()
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rtp_timestamp = struct.unpack("!I", data[4:8])[0]
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evento_dtmf = data[12]
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if rtp_timestamp == sess.ultimo_rtp_timestamp_dtmf or (ora - sess.ultimo_tempo_rtp_dtmf < 0.20 and sess.ultimo_evento_dtmf == evento_dtmf): return
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sess.ultimo_rtp_timestamp_dtmf = rtp_timestamp
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sess.ultimo_tempo_rtp_dtmf = ora
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sess.ultimo_evento_dtmf = evento_dtmf
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if evento_dtmf == 10: self.manager.gestisci_ptt(sess, True)
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elif evento_dtmf == 11: self.manager.gestisci_ptt(sess, False)
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elif 0 <= evento_dtmf <= 9: self.manager.gestisci_dtmf_digit(sess, evento_dtmf)
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class SipProtocol(asyncio.DatagramProtocol):
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def __init__(self, manager): self.manager = manager
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def connection_made(self, transport): self.manager.sip_transport = transport
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|
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def datagram_received(self, data, addr):
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if addr[0] != FREEPBX_IP and FREEPBX_IP != "0.0.0.0": return
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msg = data.decode('utf-8', errors='ignore')
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headers = {line.split(":", 1)[0].strip().upper(): line.split(":", 1)[1].strip() for line in msg.split('\r\n')[1:] if ":" in line}
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call_id = headers.get('CALL-ID', '')
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|
|
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if msg.startswith("OPTIONS"):
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resp = (f"SIP/2.0 200 OK\r\nVia: {headers.get('VIA', '')}\r\nFrom: {headers.get('FROM', '')}\r\nTo: {headers.get('TO', '')}\r\n"
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f"Call-ID: {call_id}\r\nCSeq: {headers.get('CSEQ', '')}\r\nContact: <sip:gateway@127.0.0.1:{SIP_PORT}>\r\nContent-Length: 0\r\n\r\n")
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self.manager.sip_transport.sendto(resp.encode('utf-8'), addr)
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elif msg.startswith("INVITE"):
|
|
client_rtp_port = 4000
|
|
for line in msg.split('\n'):
|
|
line = line.strip()
|
|
if line.startswith("m=audio "): client_rtp_port = int(line.split()[1])
|
|
ip_vps = "127.0.0.1"
|
|
if "@" in headers.get("TO", ""): ip_vps = headers.get("TO", "").split("@")[1].split(">")[0]
|
|
chiamante = headers.get("FROM", "").split("sip:")[1].split("@")[0]
|
|
destinatario = headers.get("TO", "").split("sip:")[1].split("@")[0]
|
|
full_from = headers.get('FROM', '')
|
|
full_to = headers.get('TO', '')
|
|
self.manager.gestisci_nuova_chiamata(call_id, chiamante, destinatario, (addr[0], client_rtp_port), addr, full_from, full_to, ip_vps)
|
|
sdp = (f"v=0\r\no=- 12345 12345 IN IP4 {ip_vps}\r\ns=Talk\r\n"
|
|
f"c=IN IP4 {ip_vps}\r\nt=0 0\r\nm=audio {RTP_PORT} RTP/AVP 8 101\r\n"
|
|
f"a=rtpmap:8 PCMA/8000\r\na=rtpmap:101 telephone-event/8000\r\na=sendrecv\r\n")
|
|
resp = (f"SIP/2.0 200 OK\r\nVia: {headers.get('VIA', '')}\r\nFrom: {full_from}\r\nTo: {full_to};tag=987654\r\n"
|
|
f"Call-ID: {call_id}\r\nCSeq: {headers.get('CSEQ', '')}\r\nContact: <sip:gateway@{ip_vps}:{SIP_PORT}>\r\n"
|
|
f"Content-Type: application/sdp\r\nContent-Length: {len(sdp)}\r\n\r\n{sdp}")
|
|
self.manager.sip_transport.sendto(resp.encode('utf-8'), addr)
|
|
elif msg.startswith("INFO"):
|
|
resp = (f"SIP/2.0 200 OK\r\nVia: {headers.get('VIA', '')}\r\nFrom: {headers.get('FROM', '')}\r\nTo: {headers.get('TO', '')}\r\n"
|
|
f"Call-ID: {call_id}\r\nCSeq: {headers.get('CSEQ', '')}\r\nContent-Length: 0\r\n\r\n")
|
|
self.manager.sip_transport.sendto(resp.encode('utf-8'), addr)
|
|
sess = self.manager.sessioni.get(call_id)
|
|
if sess:
|
|
for line in msg.split('\r\n'):
|
|
if line.upper().startswith("SIGNAL="):
|
|
signal = line.split("=")[1].strip()
|
|
if signal == "*": evento = 10
|
|
elif signal == "#": evento = 11
|
|
elif signal.isdigit(): evento = int(signal)
|
|
else: continue
|
|
if evento == 10: self.manager.gestisci_ptt(sess, True)
|
|
elif evento == 11: self.manager.gestisci_ptt(sess, False)
|
|
elif 0 <= evento <= 9: self.manager.gestisci_dtmf_digit(sess, evento)
|
|
elif msg.startswith("SIP/2.0 200 OK"):
|
|
if "INVITE" in headers.get('CSEQ', ''):
|
|
cseq_num = headers.get('CSEQ', '').split()[0]
|
|
ack_uri = f"sip:{addr[0]}:{addr[1]}"
|
|
if "CONTACT" in headers and "<" in headers["CONTACT"]: ack_uri = headers["CONTACT"].split("<")[1].split(">")[0]
|
|
ack = (f"ACK {ack_uri} SIP/2.0\r\nVia: SIP/2.0/UDP 127.0.0.1:{SIP_PORT};branch=z9hG4bK-{os.urandom(4).hex()}\r\n"
|
|
f"Max-Forwards: 70\r\nFrom: {headers.get('FROM', '')}\r\nTo: {headers.get('TO', '')}\r\n"
|
|
f"Call-ID: {call_id}\r\nCSeq: {cseq_num} ACK\r\nContent-Length: 0\r\n\r\n")
|
|
self.manager.sip_transport.sendto(ack.encode('utf-8'), addr)
|
|
elif msg.startswith("BYE"):
|
|
self.manager.termina_chiamata(call_id)
|
|
resp = (f"SIP/2.0 200 OK\r\nVia: {headers.get('VIA', '')}\r\nFrom: {headers.get('FROM', '')}\r\nTo: {headers.get('TO', '')}\r\n"
|
|
f"Call-ID: {call_id}\r\nCSeq: {headers.get('CSEQ', '')}\r\nContent-Length: 0\r\n\r\n")
|
|
self.manager.sip_transport.sendto(resp.encode('utf-8'), addr)
|
|
|
|
async def main():
|
|
loop = asyncio.get_running_loop()
|
|
manager = SessionManager()
|
|
await manager.avvia()
|
|
_, _ = await loop.create_datagram_endpoint(lambda: SipProtocol(manager), local_addr=('0.0.0.0', SIP_PORT))
|
|
_, _ = await loop.create_datagram_endpoint(lambda: RtpProtocol(manager), local_addr=('0.0.0.0', RTP_PORT))
|
|
try: await asyncio.Event().wait()
|
|
except KeyboardInterrupt: pass
|
|
|
|
if __name__ == "__main__":
|
|
asyncio.run(main())
|