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[utils] Skip remote IP addresses non matching to source address' IP version (closes #13422)

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Andrew Udvare 2018-03-16 20:11:47 -04:00 committed by Sergey M․
parent eebbce5656
commit 8959018a5f
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1 changed files with 33 additions and 0 deletions
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33
youtube_dl/utils.py
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@ -882,7 +882,40 @@ def _create_http_connection(ydl_handler, http_class, is_https, *args, **kwargs):
kwargs['strict'] = True
hc = http_class(*args, **compat_kwargs(kwargs))
source_address = ydl_handler._params.get('source_address')
if source_address is not None:
filter_for = socket.AF_INET if '.' in source_address else socket.AF_INET6
# This is to workaround _create_connection() from socket where it will try all
# address data from getaddrinfo() including IPv6. This filters the result from
# getaddrinfo() based on the source_address value.
# This is based on the cpython socket.create_connection() function.
# https://github.com/python/cpython/blob/master/Lib/socket.py#L691
def _create_connection(address, timeout=socket._GLOBAL_DEFAULT_TIMEOUT, source_address=None):
host, port = address
err = None
addrs = socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM)
ip_addrs = [addr for addr in addrs if addr[0] == filter_for]
for res in ip_addrs:
af, socktype, proto, canonname, sa = res
sock = None
try:
sock = socket.socket(af, socktype, proto)
if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
sock.settimeout(timeout)
sock.bind(source_address)
sock.connect(sa)
err = None # Explicitly break reference cycle
return sock
except socket.error as _:
err = _
if sock is not None:
sock.close()
if err is not None:
raise err
else:
raise socket.error('Unknown error occurred')
hc._create_connection = _create_connection
sa = (source_address, 0)
if hasattr(hc, 'source_address'): # Python 2.7+
hc.source_address = sa