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multicast-rtp
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multicast-rtp
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#!/usr/bin/python3
#
# Tiny SAT>IP client which activates multicast streaming.
#
# Use command line parameters of
# Create /etc/sysconfig/multicast file with syntax:
#
# <mport>:<satip-params>
#
# You can modify this file when the program is active and
# reload the configuration using the SIGHUP signal.
#
# Configuration Example:
#
# # Channel 1 on multicast port 5554, using first orbital position
# 5554:src=1&freq=11347&pol=v&ro=0.35&msys=dvbs2&\
# mtype=8psk&plts=on&sr=22000&fec=23&\
# pids=0,17,18,6600,6610,6620,6630
#
# The SAT>IP parameters should match the SAT>IP specification:
# http://www.satip.info/resources
#
# Note: The multicast address must be specified through minisatip
# option -r <ipv4_mcast> or --remote-rtp <ipv4_mcast>. By default,
# this address is 239.255.255.250.
#
# Command-line example:
#
# ./multicast-rtp \
# -s 192.168.1.100:554 -d 239.0.0.1 -p 5554 \
# -u "src=1&freq=11347&pol=v&ro=0.35&msys=dvbs2&mtype=8psk&plts=on&sr=22000&fec=23&pids=0,17,18,6600,6610,6620,6630"
#
# Note: The SAT>IP server needs to support "target" spoofing
# and multicast address as "unicast" (minisatip project does it)
#
import os
import signal
import functools
import asyncio
import syslog
import argparse,sys
import signal
VERSION='0.2'
SYSLOG=False
SERVER='127.0.0.1:554'
CONFIG=''
REQUEST=''
TARGET_ADDR=''
TARGET_PORT=0
USE_CONFIG=True
QUIET=False
#
# Command line parameters
#
parser = argparse.ArgumentParser(description='Request multicast streaming from a SAT>IP server.')
parser.add_argument('-q', '--quiet', dest='quiet',
action='store_true',
help='quiet display option')
parser.add_argument('-l', '--syslog', dest='syslog',
action='store_true',
help='enable System LOG')
parser.add_argument('-s', '--server', dest='server',
default='127.0.0.1:554',
help='server to connect')
parser.add_argument('-d', '--destination', dest='addr',
default='',
help='target address (Note: Only if server accept it!)')
parser.add_argument('-p', '--port', dest='port', type=int,
default=10000,
help='target port (default: 10000)')
if len(sys.argv) > 1:
group = parser.add_mutually_exclusive_group(required=True)
else:
group = parser.add_argument_group()
group.add_argument('-u', '--uri', dest='uri',
default='',
help='URI to request')
group.add_argument('-c', '--config', dest='config',
default='/etc/sysconfig/multicast',
help='config file with static multicast streams (default: /etc/sysconfig/multicast)')
args = parser.parse_args()
SYSLOG = args.syslog
if args.port > 0 and args.port < 65536 :
TARGET_PORT = args.port
if SERVER.find(":") < 0 :
SERVER = SERVER + ":554"
else :
parser.print_help()
sys.exit()
if len(args.server) > 0 :
SERVER = args.server
else :
parser.print_help()
sys.exit()
if len(args.uri) > 0 :
REQUEST = args.uri
elif len(args.config) > 0 :
CONFIG = args.config
else :
parser.print_help()
sys.exit()
TARGET_ADDR = args.addr
QUIET = args.quiet
if len(REQUEST) > 0 :
USE_CONFIG = False
#
#
#
def log(msg):
if QUIET :
return
if SYSLOG:
syslog.syslog(msg)
else:
print('LOG:', msg)
#
# Basic RTSP Protocol class
#
class RTSP_Protocol:
def __init__(self, client, params):
self.mport = 0
try:
self.client = client
client.protocol = self
self.mport, self.params = params.split(':')[:2]
self.mport = int(self.mport) & ~1
self.params = self.params.strip().rstrip()
self.action = 'SETUP'
except:
log('Invalid parameters: %s' % params)
client.fatal()
self.timeout = 30
self.session = ''
self.streamID = 0
self.transport = None
self.cseq = 0
def connection_made(self, transport):
self.transport = transport
peer = transport._sock.getpeername()
if self.action == 'SETUP':
s = 'rtsp://%s:%d/?%s' % (peer[0], peer[1], self.params)
log('%d (open): %s' % (self.mport, s))
msg = 'SETUP ' + s + ' RTSP/1.0\r\n'
if len(REQUEST) > 0 :
msg += 'Transport: RTP/AVP;unicast;destination=%s;client_port=%d-%d\r\n' % (TARGET_ADDR, self.mport, self.mport + 1)
else :
msg += 'Transport: RTP/AVP;multicast;port=%d-%d\r\n' % (self.mport, self.mport + 1)
msg += 'CSeq: 1\r\n\r\n'
log(' -----> : %s' % msg)
transport.write(msg.encode())
self.action = 'PLAY'
def data_received(self, data):
if not self.transport:
return
log(' <----- : %s' % data)
lines = data.decode("utf-8").splitlines()
if lines[0] != 'RTSP/1.0 200 OK':
return self.retry()
try:
cseq = 0
streamID = 0
session = ''
timeout = 0
for line in lines[1:]:
if line == '':
break
pos = line.find(':')
if pos >= 0:
header = line[:pos].lower()
data = line[pos+1:].strip().lstrip()
if header == 'cseq':
cseq = int(data)
elif header == 'com.ses.streamid':
streamID = int(data)
elif header == 'session':
a = data.split(';')
session = a[0]
for b in a[1:]:
if b.startswith('timeout='):
timeout = int(b[8:])
if timeout: self.timeout = timeout
if session: self.session = session
if streamID: self.streamID = streamID
except:
self.retry()
return
peer = self.transport._sock.getpeername()
if self.action == 'PLAY':
log('%d (setup): Session %s, streamID %d' % (self.mport, self.session, self.streamID))
self.action = 'OPTIONS'
msg = 'PLAY rtsp://%s:%d/stream=%d RTSP/1.0\r\n' % (peer[0], peer[1], self.streamID)
msg += 'Session: %s\r\n' % self.session
msg += 'CSeq: 2\r\n\r\n'
self.transport.write(msg.encode())
self.client.loop.call_at(loop.time() + self.timeout/2, self.options)
self.cseq = 2
elif self.action == 'OPTIONS' and self.cseq == 2:
log('%d (play): OK' % self.mport)
elif self.action == 'TEARDOWN':
log('%d (close): OK' % self.mport)
self.retry()
return
def options(self):
if not self.transport:
return
peer = self.transport._sock.getpeername()
if self.action == 'OPTIONS':
self.cseq += 1
msg = 'OPTIONS rtsp://%s:%d/stream=%d RTSP/1.0\r\n' % (peer[0], peer[1], self.streamID)
msg += 'Session: %s\r\n' % self.session
msg += 'CSeq: %d\r\n\r\n' % self.cseq
self.transport.write(msg.encode())
self.client.loop.call_at(loop.time() + self.timeout/2, self.options)
def teardown(self):
self.action = 'TEARDOWN'
if not self.transport:
return
peer = self.transport._sock.getpeername()
log('%d (teardown): Session %s, streamID %d' % (self.mport, self.session, self.streamID))
self.cseq += 1
msg = 'TEARDOWN rtsp://%s:%d/stream=%d RTSP/1.0\r\n' % (peer[0], peer[1], self.streamID)
msg += 'Session: %s\r\n' % self.session
msg += 'CSeq: %d\r\n\r\n' % self.cseq
self.transport.write(msg.encode())
self.client.loop.call_at(loop.time() + 1, self.retry)
def eof_received(self):
self.connection_lost(None)
def connection_lost(self, exc):
if self.transport:
log('%d (connection lost)' % self.mport)
self.client.connection_lost()
self.transport = None
def retry(self):
if self.transport:
self.transport.close()
def fatal(self):
if self.transport:
self.teardown()
self.client.protocol = None
self.client.fatal()
#
# Basic RTSP Client class
#
class RTSP_Client:
def __init__(self, clients, params):
self.clients = clients
self.loop = clients.loop
self.protocol = None
self.params = params
self.dead = False
self.deleteme = False
log('New multicast client: %s' % (params))
self.create_connection()
def create_connection(self):
srv = SERVER.split(':')
coro = self.loop.create_connection(lambda: RTSP_Protocol(self, self.params),
srv[0], srv[1] and int(srv[1]) or 554)
asyncio.async(coro, loop=self.loop)
def connection_lost(self):
self.protocol = None
self.loop.call_at(loop.time() + 30, self.create_connection)
def fatal(self):
if self.dead:
return
log("Remove multicast client: %s" % self.params)
self.dead = True
if self.protocol:
self.protocol.teardown()
self.clients.remove_client(self)
#
# RTSP clients
#
class RTSP_Clients:
def __init__(self, loop):
self.loop = loop
self.clients = []
if USE_CONFIG :
self.parse_config_file()
hupfcn = lambda: self.parse_config_file()
else :
self.parse_request()
hupfcn = lambda: self.parse_request()
loop.add_signal_handler(signal.SIGHUP,
functools.partial(hupfcn))
def remove_client(self, client):
if client in self.clients:
self.clients.remove(client)
client.fatal()
def add_client(self, params):
for c in self.clients:
if c.params == params:
c.deleteme = False
return
self.clients.append(RTSP_Client(self, params))
async def close_all(self):
for c in self.clients:
c.fatal()
def parse_request(self):
# mark clients
for c in self.clients:
c.deleteme = True
# parse command line
l = str(TARGET_PORT) + ':' + REQUEST
#print("parse_request: " + l)
self.add_client(l)
# remove marked clients
for c in self.clients:
if c.deleteme:
self.remove_client(c)
def parse_config_file(self):
# mark clients
for c in self.clients:
c.deleteme = True
# parse config
lines = []
try:
a = open(CONFIG)
lines = a.readlines()
a.close()
except:
pass
prev = ''
for l in lines:
l = prev + l.strip().rstrip()
prev = ''
if not l or (l[0] in ['#', ';']): continue
if l[-1] == '\\':
prev = l[:-1].rstrip()
else:
self.add_client(l)
# remove marked clients
for c in self.clients:
if c.deleteme:
self.remove_client(c)
#
# configuration
#
if SYSLOG:
syslog.openlog('multicast-rtp', 0, syslog.LOG_LOCAL7)
silent = QUIET
if QUIET :
QUIET = False
log('Version %s' % VERSION)
log('SERVER: %s' % SERVER)
log('CONFIG: %s' % CONFIG)
log('TARGET: %s:%d' % (TARGET_ADDR, TARGET_PORT))
log('REQUEST: %s' % REQUEST)
log('------------')
if silent :
log(' Start.')
QUIET = True
loop = asyncio.get_event_loop()
loop.add_signal_handler(signal.SIGTERM, signal.getsignal(signal.SIGINT))
clients = RTSP_Clients(loop)
try:
loop.run_forever()
except (KeyboardInterrupt, SystemExit) as e:
## Send TEARDOWN before exit!
log(' Closing.')
loop.run_until_complete(clients.close_all())
loop.run_until_complete(asyncio.sleep(1.0))
except:
print('*******')
finally:
QUIET = False
log(' Stop.')
loop.close()
if SYSLOG:
syslog.closelog()
sys.exit(0)