License for the specific language governing permissions and limitations
under the License.
"""
import os
import socket
import struct
import re
import logging
import common, lru_cache, eventloop
CACHE_SWEEP_INTERVAL = 30
VALID_HOSTNAME = re.compile(br"(?!-)[A-Z\d_-]{1,63}(?<!-)$", re.IGNORECASE)
common.patch_socket()
# rfc1035
# format
# +---------------------+
# | Header |
# +---------------------+
# | Question | the question for the name server
# +---------------------+
# | Answer | RRs answering the question
# +---------------------+
# | Authority | RRs pointing toward an authority
# +---------------------+
# | Additional | RRs holding additional information
# +---------------------+
#
import time
import os
import socket
import struct
import re
import logging
import common
import lru_cache
import eventloop
CACHE_SWEEP_INTERVAL = 30
VALID_HOSTNAME = re.compile("(?!-)[A-Z\d-]{1,63}(?<!-)$", re.IGNORECASE)
common.patch_socket()
# rfc1035
# format
# +---------------------+
# | Header |
# +---------------------+
# | Question | the question for the name server
# +---------------------+
# | Answer | RRs answering the question
# +---------------------+
# | Authority | RRs pointing toward an authority
# +---------------------+
# | Additional | RRs holding additional information
# +---------------------+
#
