TCP 状态统计脚本

---

2016-02-26 by dongnan

举个栗子

通过 netstat & awk 命令 分析 tcp 连接状态，为 zabbix 采集数据提供数据支持。

使用

# 执行命令
bash -x /root/sh/tcp_stats.sh TIME_WAIT

脚本

# 执行命令
cat /root/sh/tcp_stats.sh

#!/bin/bash
#crontab
#* * * * * /bin/netstat -n | /bin/awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}' > /tmp/tcp_stat.txt

#variables
item="$1"
tmp_file='/tmp/tcp_stat.txt'

#functions
check_var() {
    if grep $1 $tmp_file > /dev/null 2>&1 ;then
        return 0
    else
        echo 0 
        return 1
    fi
}

#main
case "$1" in
    TIME_WAIT)
        check_var $1 && awk '/TIME_WAIT/ {print $2}' $tmp_file
        ;;
    FIN_WAIT1)
        check_var $1 && awk '/FIN_WAIT1/ {print $2}' $tmp_file
        ;;
    FIN_WAIT2)
        check_var $1 && awk '/FIN_WAIT2/ {print $2}' $tmp_file
        ;;
    ESTABLISHED)
        check_var $1 && awk '/ESTABLISHED/ {print $2}' $tmp_file
        ;;
    SYN_RECV)
        check_var $1 && awk '/SYN_RECV/ {print $2}' $tmp_file
        ;;
    CLOSING)
        check_var $1 && awk '/CLOSING/ {print $2}' $tmp_file
        ;;
    *)
        echo "Usage: $0 {TIME_WAIT|FIN_WAIT1|FIN_WAIT2|ESTABLISHED|SYN_RECV|CLOSING}"
        echo "Example: $0 CLOSING"
        exit 1
        ;;
esac