함수 is_ip()

함수 is_ip()

1 Bash[ | ]

순수 bash

Bash

Copy

function is_ip() {
	IFS='.' read -ra nums <<< "$1"
	if [ ${#nums[@]} -ne 4 ]; then echo 0; return; fi
	for num in "${nums[@]}"; do
		if [ "$num" != "$((10#$num))" ]||[ $num -lt 0 ]||[ $num -gt 255 ]; then echo 0; return; fi
	done	
	echo 1
}

# 1
is_ip 0.0.0.0
is_ip 0.0.0.1
is_ip 0.0.1.0
is_ip 255.255.255.255
is_ip 135.79.246.80

# 0
is_ip 0.0.0.256
is_ip 0.0.0.0.0
is_ip 0.0.0.00
is_ip 135.79.246.080

신버전 ipcalc 활용(v0.41)

Bash

Copy

echo $((`ipcalc 135.79.246.80 | grep INVALID | wc -l`^1))
# 1
echo $((`ipcalc 135.79.246.280 | grep INVALID | wc -l`^1))
# 0

구버전 ipcalc 활용(2008)

Bash

Copy

ipcalc -s -c 135.79.246.80; echo $(($?^1))
# 1
ipcalc -s -c 135.79.246.280; echo $(($?^1))
# 0

2 Go[ | ]

Go isIP() 문서를 참고하십시오.

Go

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package main

import (
	"fmt"
	"net"
)

func isIP(ip string) bool {
	return net.ParseIP(ip) != nil
}

func main() {
	// true
	fmt.Println(isIP("10.40.210.253"))
	fmt.Println(isIP("2001:0db8:85a3:0000:0000:8a2e:0370:7334"))

	// false
	fmt.Println(isIP("1000.40.210.253"))
	fmt.Println(isIP("2001:0db8:85a3:0000:0000:8a2e:0370:7334:3445"))
}

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3 PHP[ | ]

PHP is_ip() 문서를 참고하십시오.

PHP

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function is_ip($ip) { return ip2long($ip)?true:false; }

# true
var_dump( is_ip('1.1.1.1') );
var_dump( is_ip('135.79.246.80') );

# false
var_dump( is_ip('1.1.1.1.') );
var_dump( is_ip('1.1.1.256') );
var_dump( is_ip('135.79.256.080') );

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4 Python[ | ]

파이썬 is_ip() 문서를 참고하십시오.

Python

Copy

import ipaddress
def is_ip(ip):
    try:
        ipaddress.ip_address(ip)
    except ValueError:
        return False
    return True
    
# True
print( is_ip('1.1.1.1') )
print( is_ip('192.168.0.1') )
print( is_ip('135.79.246.80') )

# False
print( is_ip('1.1.1.1.') )
print( is_ip('1.1.1.256') )
print( is_ip('192.168.0.256') )
print( is_ip('135.79.256.080') )

5 같이 보기[ | ]