| ## This file is part of Scapy |
| ## See http://www.secdev.org/projects/scapy for more informations |
| ## Copyright (C) Philippe Biondi <phil@secdev.org> |
| ## This program is published under a GPLv2 license |
| |
| """ |
| Logging subsystem and basic exception class. |
| """ |
| |
| ############################# |
| ##### Logging subsystem ##### |
| ############################# |
| |
| class Scapy_Exception(Exception): |
| pass |
| |
| import logging, traceback, time |
| |
| class ScapyFreqFilter(logging.Filter): |
| def __init__(self): |
| logging.Filter.__init__(self) |
| self.warning_table = {} |
| def filter(self, record): |
| from scapy.config import conf |
| wt = conf.warning_threshold |
| if wt > 0: |
| stk = traceback.extract_stack() |
| caller=None |
| for f,l,n,c in stk: |
| if n == 'warning': |
| break |
| caller = l |
| tm,nb = self.warning_table.get(caller, (0,0)) |
| ltm = time.time() |
| if ltm-tm > wt: |
| tm = ltm |
| nb = 0 |
| else: |
| if conf.warning_next_only_once: |
| conf.warning_next_only_once = False |
| return 0 |
| if nb < 2: |
| nb += 1 |
| if nb == 2: |
| record.msg = "more "+record.msg |
| else: |
| return 0 |
| self.warning_table[caller] = (tm,nb) |
| return 1 |
| |
| try: |
| from logging import NullHandler |
| except ImportError: |
| # compat for python 2.6 |
| from logging import Handler |
| class NullHandler(Handler): |
| def emit(self, record): |
| pass |
| log_scapy = logging.getLogger("scapy") |
| log_scapy.addHandler(NullHandler()) |
| log_runtime = logging.getLogger("scapy.runtime") # logs at runtime |
| log_runtime.addFilter(ScapyFreqFilter()) |
| log_interactive = logging.getLogger("scapy.interactive") # logs in interactive functions |
| log_loading = logging.getLogger("scapy.loading") # logs when loading Scapy |
| |
| |
| def warning(x, *args, **kargs): |
| """ |
| Prints a warning during runtime. |
| |
| onlyOnce - if True, the warning will never be printed again. |
| """ |
| if kargs.pop("onlyOnce", False): |
| from scapy.config import conf |
| conf.warning_next_only_once = True |
| log_runtime.warning(x, *args, **kargs) |
