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Land , Support dual IPv4 / IPv6 TCP servers in Python

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This commit is contained in:
Grant Willcox 2023-01-13 14:01:41 -06:00
commit 9c70f169b2
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GPG Key ID: D35E05C0F2B81E83
1 changed files with 16 additions and 7 deletions

23
python/meterpreter/ext_server_stdapi.py

@ -1133,15 +1133,24 @@ def channel_open_stdapi_net_tcp_client(request, response):
@register_function
def channel_open_stdapi_net_tcp_server(request, response):
local_host = packet_get_tlv(request, TLV_TYPE_LOCAL_HOST).get('value', '0.0.0.0')
use_dual_stack = False
local_host = packet_get_tlv(request, TLV_TYPE_LOCAL_HOST).get('value', '')
local_port = packet_get_tlv(request, TLV_TYPE_LOCAL_PORT)['value']
local_address_info = getaddrinfo(local_host, local_port, socktype=socket.SOCK_STREAM, proto=socket.IPPROTO_TCP)
if not local_address_info:
return ERROR_FAILURE, response
local_address_info = local_address_info[0]
server_sock = socket.socket(local_address_info['family'], local_address_info['socktype'], local_address_info['proto'])
if local_host:
local_address_info = getaddrinfo(local_host, local_port, socktype=socket.SOCK_STREAM, proto=socket.IPPROTO_TCP, flags=socket.AI_NUMERICHOST)
if not local_address_info:
return ERROR_FAILURE, response
local_address_info = local_address_info[0]
else:
local_address_info = {
'family': socket.AF_INET6,
'sockaddr': ('::', local_port, 0, 0)
}
use_dual_stack = hasattr(socket, 'IPV6_V6ONLY')
debug_print('[*] no local host information, binding to all available interfaces...')
server_sock = socket.socket(local_address_info['family'], socket.SOCK_STREAM, socket.IPPROTO_TCP)
server_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
if local_address_info['family'] == socket.AF_INET6 and hasattr(socket, 'IPV6_V6ONLY'):
if local_address_info['family'] == socket.AF_INET6 and use_dual_stack:
server_sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
server_sock.bind(local_address_info['sockaddr'])
server_sock.listen(socket.SOMAXCONN)