yunazuno

#include <uapi/linux/if_ether.h>
#include <uapi/linux/in.h>
#include <uapi/linux/ip.h>
#include <uapi/linux/tcp.h>

int drop_ipv4_tcp_80(struct xdp_md *ctx) {
  void *data = (void *)(long)ctx->data;
  void *data_end = (void *)(long)ctx->data_end;

  struct ethhdr *eth;

yunazuno

#!/usr/bin/env python3
import pyroute2
import socket
from pyroute2.netlink import rtnl
import subprocess
import time
from operator import itemgetter


class TCL3Switch(object):

yunazuno

#!/usr/bin/env python
import socket
import fcntl
import struct
import array

SIOCETHTOOL = 0x8946
ETHTOOL_GSTRINGS = 0x0000001b
ETHTOOL_GSSET_INFO = 0x00000037
ETHTOOL_GSTATS = 0x0000001d

yunazuno

Summary

In Consul v0.8.4 or later, consul watch -type event HANDLER gives same events several time to the HANDLER.

Reproduction steps

1. Invoke consul watch -type event HANDLER to wait events
2. Invoke consul event -name "foo" several time to fire events

Expected result

yunazuno

import hashlib


class MaglevHash(object):
    def __init__(self, m=65537):
        self.m = m
        self.permutation = {}
        self.entry = [None] * self.m

    def add(self, node):

yunazuno

#define KBUILD_MODNAME "xdp_drop_80_8080"
#include <uapi/linux/bpf.h>
#include <linux/in.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/ipv6.h>

BPF_HASH(counter, uint32_t, long);

yunazuno

#!/usr/bin/env python2
from twisted.internet import reactor
from twisted.names import client, dns, server
import ipaddr
import socket


class SixFourResolver(client.Resolver):
    def __init__(
            self,

yunazuno

[root@HOSTNAME:~]# netstat -natup
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name
(snip)
tcp        0      0 0.0.0.0:8080                0.0.0.0:*                   LISTEN      38681/java          
tcp        0      0 127.0.0.1:48176             127.0.0.1:8080              ESTABLISHED 38681/java          
tcp       71      0 127.0.0.1:8080              127.0.0.1:48176             ESTABLISHED 38681/java

yunazuno

[testuser@HOSTNAME norikra]$ uname -a
Linux HOSTNAME 2.6.32-431.29.2.el6.x86_64 #1 SMP Tue Sep 9 21:36:05 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
[testuser@HOSTNAME norikra]$ cat /etc/redhat-release 
CentOS release 6.5 (Final)
[testuser@HOSTNAME norikra]$ rbenv version
jruby-1.7.17 (set by RBENV_VERSION environment variable)
[testuser@HOSTNAME norikra]$ jruby --version
jruby 1.7.17 (1.9.3p392) 2014-12-09 fafd1a7 on OpenJDK 64-Bit Server VM 1.7.0_65-mockbuild_2014_07_16_06_06-b00 +jit [linux-amd64]
[testuser@HOSTNAME norikra]$ gem list

yunazuno

#!/usr/bin/env python

from norikraclient.client import Client
import pprint

norikra = Client()


def __read_data():
    # Actually, here we read data from a data source (e.g., csv file)