"함수 is port open()"의 두 판 사이의 차이

2022년 2월 11일 (금) 20:36 기준 최신판

1 개요[ | ]

is_port_open
is_port_listen

test set

8.8.8.8, 21 → false

8.8.8.8, 53 → true

2 Bash[ | ]

IP=8.8.8.8
PORT=53
TIMEOUT=2
IS_PORT_OPEN=`nc -z -w$TIMEOUT $IP $PORT`
if [ "$IS_PORT_OPEN" = "" ]
then
	IS_PORT_OPEN=false
else
	IS_PORT_OPEN=true
fi
echo $IS_PORT_OPEN
# true

3 C#[ | ]

private bool isPortOpen(string host, int port) {
   try {
       TcpClient tc = new TcpClient();
       tc.Connect(host, port);
   }
   catch {
       return false;
   }
   return true;
}

4 PHP[ | ]

function is_port_open($host, $port, $timeout=2) {
  $result = @fsockopen($host, $port, $errno, $errstr, $timeout);
  if($result)	return true;
  return false;
}

5 같이 보기[ | ]

@@ 1번째 줄: / 1번째 줄: @@
+==개요==
+[[category: network]]
 ;is_port_open
 ;is_port_listen
@@ 6번째 줄: / 8번째 줄: @@
 ==Bash==
-<source lang='bash'>
+[[category: Bash]]
+<syntaxhighlight lang='bash'>
 IP=8.8.8.8
 PORT=53
-TIMEOUT=3
+TIMEOUT=2
-IS_OPEN_PORT=`nc -z -w$TIMEOUT $IP $PORT`
+IS_PORT_OPEN=`nc -z -w$TIMEOUT $IP $PORT`
-if [ "$IS_OPEN_PORT" = "" ]
+if [ "$IS_PORT_OPEN" = "" ]
 then
-	IS_OPEN_PORT=false
+	IS_PORT_OPEN=false
 else
-	IS_OPEN_PORT=true
+	IS_PORT_OPEN=true
 fi
-echo $IS_OPEN_PORT
+echo $IS_PORT_OPEN
 # true
-</source>
+</syntaxhighlight>
 ==C#==
-<source lang='csharp'>
+[[category: csharp]]
+<syntaxhighlight lang='csharp'>
 private bool isPortOpen(string host, int port) {
     try {
@@ 33번째 줄: / 37번째 줄: @@
     return true;
 }
-</source>
+</syntaxhighlight>
 ==PHP==
-<source lang='php'>
+[[category: PHP]]
-function is_port_open($host, $port) {
+<syntaxhighlight lang='php'>
-  $timeout = 3;
+function is_port_open($host, $port, $timeout=2) {
-   $resource = @fsockopen($host, $port, $errno, $errstr, $timeout);
+   $result = @fsockopen($host, $port, $errno, $errstr, $timeout);
-   if($resource)	return true;
+   if($result)	return true;
    return false;
 }
-</source>
+</syntaxhighlight>
-==See also==
+==같이 보기==
-*[[ping]]
+*[[is_ping()]]
 *[[리눅스 로컬서버 열린 포트 확인]]
-[[category: network]]
-[[category: Bash]]
-[[category: csharp]]
-[[category: PHP]]