def _delete_rules(self, ipfw_list=None):
if ipfw_list is None:
ipfw_list = platformsettings.ipfw('list')
existing_rules = set(
r.split()[0].lstrip('0') for r in ipfw_list.splitlines())
delete_rules = [r for r in (self._DOWNLOAD_RULE, self._UPLOAD_RULE)
if r in existing_rules]
if delete_rules:
platformsettings.ipfw('delete', *delete_rules)
def _delete_rules(self, ipfw_list=None):
if ipfw_list is None:
ipfw_list = platformsettings.ipfw('list')
existing_rules = set(r.split()[0].lstrip('0')
for r in ipfw_list.splitlines())
delete_rules = [
r for r in (self._DOWNLOAD_RULE, self._UPLOAD_RULE)
if r in existing_rules
]
if delete_rules:
platformsettings.ipfw('delete', *delete_rules)
def __enter__(self):
if self.use_loopback:
platformsettings.setup_temporary_loopback_config()
if self.init_cwnd != '0':
platformsettings.set_temporary_tcp_init_cwnd(self.init_cwnd)
try:
ipfw_list = platformsettings.ipfw('list')
if not ipfw_list.startswith('65535 '):
logging.warn('ipfw has existing rules:\n%s', ipfw_list)
self._delete_rules(ipfw_list)
except:
pass
if (self.up_bandwidth == '0' and self.down_bandwidth == '0'
and self.delay_ms == '0' and self.packet_loss_rate == '0'):
logging.info('Skipped shaping traffic.')
return
if not self.dns_port and not self.port:
raise TrafficShaperException('No ports on which to shape traffic.')
ports = ','.join(
str(p) for p in (self.port, self.ssl_port, self.dns_port) if p)
half_delay_ms = int(self.delay_ms) / 2 # split over up/down links
try:
# Configure upload shaping.
platformsettings.ipfw(
'pipe',
self._UPLOAD_PIPE,
'config',
'bw',
self.up_bandwidth,
'delay',
half_delay_ms,
)
platformsettings.ipfw(
'queue',
self._UPLOAD_QUEUE,
'config',
'pipe',
self._UPLOAD_PIPE,
'plr',
self.packet_loss_rate,
'queue',
self._QUEUE_SLOTS,
'mask',
'src-port',
'0xffff',
)
platformsettings.ipfw(
'add',
self._UPLOAD_RULE,
'queue',
self._UPLOAD_QUEUE,
'ip',
'from',
'any',
'to',
self.host,
self.use_loopback and 'out' or 'in',
'dst-port',
ports,
)
self.is_shaping = True
# Configure download shaping.
platformsettings.ipfw(
'pipe',
self._DOWNLOAD_PIPE,
'config',
'bw',
self.down_bandwidth,
'delay',
half_delay_ms,
)
platformsettings.ipfw(
'queue',
self._DOWNLOAD_QUEUE,
'config',
'pipe',
self._DOWNLOAD_PIPE,
'plr',
self.packet_loss_rate,
'queue',
self._QUEUE_SLOTS,
'mask',
'dst-port',
'0xffff',
)
platformsettings.ipfw(
'add',
self._DOWNLOAD_RULE,
'queue',
self._DOWNLOAD_QUEUE,
'ip',
'from',
self.host,
'to',
'any',
'out',
'src-port',
ports,
)
logging.info('Started shaping traffic')
except Exception:
logging.error('Unable to shape traffic.')
raise
def __enter__(self):
if self.use_loopback:
platformsettings.setup_temporary_loopback_config()
if self.init_cwnd != '0':
platformsettings.set_temporary_tcp_init_cwnd(self.init_cwnd)
try:
ipfw_list = platformsettings.ipfw('list')
if not ipfw_list.startswith('65535 '):
logging.warn('ipfw has existing rules:\n%s', ipfw_list)
self._delete_rules(ipfw_list)
except:
pass
if (self.up_bandwidth == '0' and self.down_bandwidth == '0' and
self.delay_ms == '0' and self.packet_loss_rate == '0'):
logging.info('Skipped shaping traffic.')
return
if not self.ports:
raise TrafficShaperException('No ports on which to shape traffic.')
ports = ','.join(str(p) for p in self.ports)
half_delay_ms = int(self.delay_ms) / 2 # split over up/down links
try:
# Configure upload shaping.
platformsettings.ipfw(
'pipe', self._UPLOAD_PIPE,
'config',
'bw', self.up_bandwidth,
'delay', half_delay_ms,
)
platformsettings.ipfw(
'queue', self._UPLOAD_QUEUE,
'config',
'pipe', self._UPLOAD_PIPE,
'plr', self.packet_loss_rate,
'queue', self._QUEUE_SLOTS,
'mask', 'src-port', '0xffff',
)
platformsettings.ipfw(
'add', self._UPLOAD_RULE,
'queue', self._UPLOAD_QUEUE,
'ip',
'from', 'any',
'to', self.host,
self.use_loopback and 'out' or 'in',
'dst-port', ports,
)
self.is_shaping = True
# Configure download shaping.
platformsettings.ipfw(
'pipe', self._DOWNLOAD_PIPE,
'config',
'bw', self.down_bandwidth,
'delay', half_delay_ms,
)
platformsettings.ipfw(
'queue', self._DOWNLOAD_QUEUE,
'config',
'pipe', self._DOWNLOAD_PIPE,
'plr', self.packet_loss_rate,
'queue', self._QUEUE_SLOTS,
'mask', 'dst-port', '0xffff',
)
platformsettings.ipfw(
'add', self._DOWNLOAD_RULE,
'queue', self._DOWNLOAD_QUEUE,
'ip',
'from', self.host,
'to', 'any',
'out',
'src-port', ports,
)
logging.info('Started shaping traffic')
except Exception:
logging.error('Unable to shape traffic.')
raise
def __enter__(self):
if self.init_cwnd != '0':
platformsettings.set_temporary_tcp_init_cwnd(self.init_cwnd)
try:
ipfw_list = platformsettings.ipfw('list')
if not ipfw_list.startswith('65535 '):
logging.warn('ipfw has existing rules:\n%s', ipfw_list)
self._delete_rules(ipfw_list)
except Exception:
pass
if (self.up_bandwidth == '0' and self.down_bandwidth == '0'
and self.delay_ms == '0' and self.packet_loss_rate == '0'):
logging.info('Skipped shaping traffic.')
return
half_delay_ms = int(self.delay_ms) / 2 # split over up/down links
try:
# Don't shape on 127.0.0.1. Any external traffic goes through the
# external interface.
# Configure upload shaping.
platformsettings.ipfw(
'pipe',
self._UPLOAD_PIPE,
'config',
'bw',
self.up_bandwidth,
'delay',
half_delay_ms,
)
platformsettings.ipfw(
'queue',
self._UPLOAD_QUEUE,
'config',
'pipe',
self._UPLOAD_PIPE,
'plr',
self.packet_loss_rate,
'queue',
self._QUEUE_SLOTS,
'mask',
'src-port',
'0xffff',
)
platformsettings.ipfw('add', self._UPLOAD_RULE, 'queue',
self._UPLOAD_QUEUE, 'ip', 'from', 'not',
'127.0.0.1', 'not', '22', 'to', 'not',
'127.0.0.1', 'out')
self.is_shaping = True
# Configure download shaping.
platformsettings.ipfw(
'pipe',
self._DOWNLOAD_PIPE,
'config',
'bw',
self.down_bandwidth,
'delay',
half_delay_ms,
)
platformsettings.ipfw(
'queue',
self._DOWNLOAD_QUEUE,
'config',
'pipe',
self._DOWNLOAD_PIPE,
'plr',
self.packet_loss_rate,
'queue',
self._QUEUE_SLOTS,
'mask',
'dst-port',
'0xffff',
)
platformsettings.ipfw(
'add',
self._DOWNLOAD_RULE,
'queue',
self._DOWNLOAD_QUEUE,
'ip',
'from',
'not',
'127.0.0.1',
'to',
'not',
'127.0.0.1',
'not',
'22',
'in',
)
logging.info('Started shaping traffic')
except Exception:
logging.error('Unable to shape traffic.')
raise
