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| """Utility functions for aiohappyeyeballs.""" | |
| import ipaddress | |
| import socket | |
| from typing import Dict, List, Optional, Tuple, Union | |
| from .types import AddrInfoType | |
| def addr_to_addr_infos( | |
| addr: Optional[ | |
| Union[Tuple[str, int, int, int], Tuple[str, int, int], Tuple[str, int]] | |
| ], | |
| ) -> Optional[List[AddrInfoType]]: | |
| """Convert an address tuple to a list of addr_info tuples.""" | |
| if addr is None: | |
| return None | |
| host = addr[0] | |
| port = addr[1] | |
| is_ipv6 = ":" in host | |
| if is_ipv6: | |
| flowinfo = 0 | |
| scopeid = 0 | |
| addr_len = len(addr) | |
| if addr_len >= 4: | |
| scopeid = addr[3] # type: ignore[misc] | |
| if addr_len >= 3: | |
| flowinfo = addr[2] # type: ignore[misc] | |
| addr = (host, port, flowinfo, scopeid) | |
| family = socket.AF_INET6 | |
| else: | |
| addr = (host, port) | |
| family = socket.AF_INET | |
| return [(family, socket.SOCK_STREAM, socket.IPPROTO_TCP, "", addr)] | |
| def pop_addr_infos_interleave( | |
| addr_infos: List[AddrInfoType], interleave: Optional[int] = None | |
| ) -> None: | |
| """ | |
| Pop addr_info from the list of addr_infos by family up to interleave times. | |
| The interleave parameter is used to know how many addr_infos for | |
| each family should be popped of the top of the list. | |
| """ | |
| seen: Dict[int, int] = {} | |
| if interleave is None: | |
| interleave = 1 | |
| to_remove: List[AddrInfoType] = [] | |
| for addr_info in addr_infos: | |
| family = addr_info[0] | |
| if family not in seen: | |
| seen[family] = 0 | |
| if seen[family] < interleave: | |
| to_remove.append(addr_info) | |
| seen[family] += 1 | |
| for addr_info in to_remove: | |
| addr_infos.remove(addr_info) | |
| def _addr_tuple_to_ip_address( | |
| addr: Union[Tuple[str, int], Tuple[str, int, int, int]], | |
| ) -> Union[ | |
| Tuple[ipaddress.IPv4Address, int], Tuple[ipaddress.IPv6Address, int, int, int] | |
| ]: | |
| """Convert an address tuple to an IPv4Address.""" | |
| return (ipaddress.ip_address(addr[0]), *addr[1:]) | |
| def remove_addr_infos( | |
| addr_infos: List[AddrInfoType], | |
| addr: Union[Tuple[str, int], Tuple[str, int, int, int]], | |
| ) -> None: | |
| """ | |
| Remove an address from the list of addr_infos. | |
| The addr value is typically the return value of | |
| sock.getpeername(). | |
| """ | |
| bad_addrs_infos: List[AddrInfoType] = [] | |
| for addr_info in addr_infos: | |
| if addr_info[-1] == addr: | |
| bad_addrs_infos.append(addr_info) | |
| if bad_addrs_infos: | |
| for bad_addr_info in bad_addrs_infos: | |
| addr_infos.remove(bad_addr_info) | |
| return | |
| # Slow path in case addr is formatted differently | |
| match_addr = _addr_tuple_to_ip_address(addr) | |
| for addr_info in addr_infos: | |
| if match_addr == _addr_tuple_to_ip_address(addr_info[-1]): | |
| bad_addrs_infos.append(addr_info) | |
| if bad_addrs_infos: | |
| for bad_addr_info in bad_addrs_infos: | |
| addr_infos.remove(bad_addr_info) | |
| return | |
| raise ValueError(f"Address {addr} not found in addr_infos") | |