IP地址转换器 [英] IP Address Converter
问题描述
有是IP地址:66.102.13.19,并从该地址作为接收到该地址
的http:// 1113984275
但如何?以及我如何使用bash的帮助使这个。
例如,这项服务可以做到这一点,但我不明白的算法。
IP = 66.102.13.19
IFS =。阅读-r A B C D<<< $ IP
printf的'%s的%d个\\ N'的http://$((A * 256 ** 3 + B * 256 ** 2 + C * 256 + D))
顺便说一句,在你的问题的数量不匹配的IP地址。
要一个十进制转换为IP:
#!/斌/庆典
dec2ip(){
本地IP DEC = $ @
为电子商务在{} 3..0
做
((八位字节= DEC /(256 ** E)))
((十二月 - =八位* 256 ** e)条)
IP + = $ $ DELIM八位
DELIM =。
DONE
printf的'%s的\\ n'$ IP
}dec2ip$ @
要一个IP转换为十进制:
#!/斌/庆典
ip2dec(){
本地A B C D IP = $ @
IFS =。阅读-r A B C D<<< $ IP
printf的%d个\\ N'$((A * 256 ** 3 + B * 256 ** 2 + C * 256 + D))
}ip2dec$ @
演示:
$ ./dec2ip 1113984275
66.102.13.19$ ./ip2dec 66.102.13.19
1113984275
这两个脚本依赖于不在一些伯恩衍生弹present猛砸功能。以下是AWK版本改用:
#!的/ usr /斌/的awk -f
#dec2ip
开始 {
DEC = ARGV [1]
对于(E = 3; e基= 0; E--){
八位字节= INT(DEC /(256 ^ E))
十二月 - =八位* 256 ^ E
IP = IP DELIM八位
DELIM =。
}
的printf(%S \\ n,IP)
}
和
#!的/ usr /斌/的awk -f
#ip2dec
开始 {
IP = ARGV [1]
拆分(IP,八位,。)
对于(i = 1; I< = 4;我++){
十二月+ =八位[I] * 256 **(4 - I)
}
的printf(%I \\ N,DEC)
}
它们可以以相同的方式被称为如上述的击脚本。
There is IP address: 66.102.13.19, and from this address as that received this address
http://1113984275
But how? And how I can make this with the help of bash. For example, this service can do it, but I do not understand the algorithm.
ip=66.102.13.19
IFS=. read -r a b c d <<< "$ip"
printf '%s%d\n' "http://" "$((a * 256 ** 3 + b * 256 ** 2 + c * 256 + d))"
By the way, the number in your question doesn't match the IP address.
To convert a decimal to an IP:
#!/bin/bash
dec2ip () {
local ip dec=$@
for e in {3..0}
do
((octet = dec / (256 ** e) ))
((dec -= octet * 256 ** e))
ip+=$delim$octet
delim=.
done
printf '%s\n' "$ip"
}
dec2ip "$@"
To convert an IP to a decimal:
#!/bin/bash
ip2dec () {
local a b c d ip=$@
IFS=. read -r a b c d <<< "$ip"
printf '%d\n' "$((a * 256 ** 3 + b * 256 ** 2 + c * 256 + d))"
}
ip2dec "$@"
Demo:
$ ./dec2ip 1113984275
66.102.13.19
$ ./ip2dec 66.102.13.19
1113984275
These two scripts rely on features of Bash that aren't present in some Bourne-derived shells. Here are AWK versions to use instead:
#!/usr/bin/awk -f
# dec2ip
BEGIN {
dec = ARGV[1]
for (e = 3; e >= 0; e--) {
octet = int(dec / (256 ^ e))
dec -= octet * 256 ^ e
ip = ip delim octet
delim = "."
}
printf("%s\n", ip)
}
and
#!/usr/bin/awk -f
# ip2dec
BEGIN {
ip = ARGV[1]
split(ip, octets, ".")
for (i = 1; i <= 4; i++) {
dec += octets[i] * 256 ** (4 - i)
}
printf("%i\n", dec)
}
They can be called in the same manner as the Bash scripts above.
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