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Add interface scope for link-local IPv6 addresses

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Mark Qvist 2024-11-20 18:02:50 +01:00
parent 49dba483a9
commit 1282061701
1 changed files with 5 additions and 7 deletions
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10
RNS/Interfaces/TCPInterface.py
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@ -419,31 +419,29 @@ class TCPServerInterface(Interface):
def get_address_for_if(name, bind_port, prefer_ipv6=False): def get_address_for_if(name, bind_port, prefer_ipv6=False):
import RNS.vendor.ifaddr.niwrapper as netinfo import RNS.vendor.ifaddr.niwrapper as netinfo
ifaddr = netinfo.ifaddresses(name) ifaddr = netinfo.ifaddresses(name)
if len(ifaddr) < 1: if len(ifaddr) < 1:
raise SystemError(f"No addresses available on specified kernel interface \"{name}\" for TCPServerInterface to bind to") raise SystemError(f"No addresses available on specified kernel interface \"{name}\" for TCPServerInterface to bind to")
if prefer_ipv6 and netinfo.AF_INET6 in ifaddr: if prefer_ipv6 and netinfo.AF_INET6 in ifaddr:
bind_ip = ifaddr[netinfo.AF_INET6][0]["addr"] bind_ip = ifaddr[netinfo.AF_INET6][0]["addr"]
if bind_ip.lower().startswith("fe80::"):
# We'll need to add the interface as scope for link-local addresses
return TCPServerInterface.get_address_for_host(f"{bind_ip}%{name}", bind_port) return TCPServerInterface.get_address_for_host(f"{bind_ip}%{name}", bind_port)
else:
return TCPServerInterface.get_address_for_host(bind_ip, bind_port)
elif netinfo.AF_INET in ifaddr: elif netinfo.AF_INET in ifaddr:
bind_ip = ifaddr[netinfo.AF_INET][0]["addr"] bind_ip = ifaddr[netinfo.AF_INET][0]["addr"]
return (bind_ip, bind_port) return (bind_ip, bind_port)
else: else:
raise SystemError(f"No addresses available on specified kernel interface \"{name}\" for TCPServerInterface to bind to") raise SystemError(f"No addresses available on specified kernel interface \"{name}\" for TCPServerInterface to bind to")
@staticmethod @staticmethod
def get_address_for_host(name, bind_port): def get_address_for_host(name, bind_port):
address_info = socket.getaddrinfo(name, bind_port, proto=socket.IPPROTO_TCP)[0] address_info = socket.getaddrinfo(name, bind_port, proto=socket.IPPROTO_TCP)[0]
if address_info[0] == socket.AF_INET6: if address_info[0] == socket.AF_INET6:
return (name, bind_port, address_info[4][2], address_info[4][3]) return (name, bind_port, address_info[4][2], address_info[4][3])
elif address_info[0] == socket.AF_INET: elif address_info[0] == socket.AF_INET:
return (name, bind_port) return (name, bind_port)
else: else:
raise SystemError(f"No suitable kernel interface available for address \"{name}\" for TCPServerInterface to bind to") raise SystemError(f"No suitable kernel interface available for address \"{name}\" for TCPServerInterface to bind to")