xjdrew

编译

通过ubuntu的apt-get安装的squid没有启用ssl功能，需要手动编译。

编译squid步骤如下。

安装依赖及获取源代码

apt-get install openssl libssl-dev ssl-cert
apt-get source squid

xjdrew

断线重连协议 2.0

约定

1. 定长协议: 每条协议的请求和响应应该是固定长度的。
2. 小头编码：所有数字的字节都使用little-endian

协议

新建连接

xjdrew

#include <syslog.h>

#include <lua.h>
#include <lauxlib.h>

#define LSYSLOG_FCOUNT 8

static int facilitys[LSYSLOG_FCOUNT] = {
    LOG_LOCAL0,
    LOG_LOCAL1,

xjdrew

-- port from golang: https://golang.org/src/time/time.go
--

local secondsPerMinute = 60
local secondsPerHour   = 60 * 60
local secondsPerDay    = 24 * secondsPerHour
local secondsPerWeek   = 7 * secondsPerDay
local daysPer400Years  = 365*400 + 97
local daysPer100Years  = 365*100 + 24
local daysPer4Years    = 365*4 + 1

xjdrew

package main

import (
        "crypto/dsa"
        "crypto/rand"
        "crypto/sha1"
        "crypto/x509"
        "encoding/asn1"
        "encoding/pem"
        "errors"

xjdrew

1. Bitcoins the hard way: Using the raw Bitcoin protocol

xjdrew

#include <sys/time.h>
#include <sys/resource.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define ONE_SECOND      1000000000L
#define ONE_MS 1000000L

xjdrew

#include <stdio.h>

int* a[5];
int& ref() {
    return *a[0];
}

void print(int* p) {
    printf("%p\n", p);
}

xjdrew

桥接网卡

模拟docker的网络，使network namespace中的网卡可以访问外网

步骤

• 创建namespace

# ip netns add netns1
# ip netns show

xjdrew

local count = 10000
local items = 10000

local g = {}
collectgarbage("stop")
function run_gc_test(tag, mt)
  for i=1,count do
    local t = {}
    if mt then
      setmetatable(t, mt)