xjdrew

extern "C" {
#include "lua.h"
#include "lauxlib.h"
}

#include <string>
#include <ext/hash_map>

using namespace std;
using namespace __gnu_cxx;

xjdrew

build

go build tcpinfo.go

run

./tcpinfo -h
./tcpinfo

xjdrew

{"lastUpload":"2021-11-29T08:49:08.133Z","extensionVersion":"v3.4.3"}

xjdrew

local function jump_consistent_hash(key, num_buckets)
    local b = -1
    local j = 0
    while j < num_buckets do
        b = j
        key = key * 2862933555777941757 + 1
        j = math.floor((b+1) * (1<<31) / ((key>>33) + 1))
    end
    return b
end

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)

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

#include <stdio.h>

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

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

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

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

xjdrew

package main

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