✏️ Editing: auth_protocol.py Read Only

import asyncio
import socket
import logging
import struct

logger = logging.getLogger(__name__)

class UnixSocketAuthProtocol(asyncio.Protocol):
    """
    This protocol uses SO_PEERCRED attribute of unix socket
    to get authentication data (pid, uid, gid)
    After connect, this values are stored in object's
    _pid, _uid, _gid attributes
    """

# ucred struct format (3 integers)
    # struct ucred
    # {
    #   pid_t pid;            /* PID of sending process.  */
    #   uid_t uid;            /* UID of sending process.  */
    #   gid_t gid;            /* GID of sending process.  */
    # };
    #
    STRUCT_FORMAT = "3i"

def connection_made(self, transport):
        self._transport = transport
        conn = self._transport.get_extra_info("socket")
        creds = conn.getsockopt(
            socket.SOL_SOCKET,
            socket.SO_PEERCRED,
            struct.calcsize(self.STRUCT_FORMAT),
        )
        self._pid, self._uid, self._gid = struct.unpack(
            self.STRUCT_FORMAT, creds
        )
        logger.debug(
            "New socket connection from pid=%s, uid=%s, gid=%s",
            self._pid,
            self._uid,
            self._gid,
        )

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