Avoid name resolving when we are just trying to ping an ip address

mavris · May 28, 2017 · 2cb0c1c · 2cb0c1c
1 parent 1a4ab4b
commit 2cb0c1c
Showing 1 changed file with 12 additions and 1 deletion.
diff --git a/MMLanScan/Misc/PingOperation.m b/MMLanScan/Misc/PingOperation.m
@@ -38,7 +38,7 @@ -(instancetype)initWithIPToPing:(NSString*)ip andCompletionHandler:(nullable voi
     if (self) {
         self.name = ip;
         self.ipStr= ip;
-        self.simplePing = [SimplePing simplePingWithHostName:ip];
+        self.simplePing = [SimplePing simplePingWithHostAddress:self.addrDataFromIp];
         self.simplePing.delegate = self;
         self.result = result;
         _isExecuting = NO;
@@ -49,6 +49,17 @@ -(instancetype)initWithIPToPing:(NSString*)ip andCompletionHandler:(nullable voi
     return self;
 };
 
+- (NSData *)addrDataFromIp {
+    struct sockaddr_in remoteAddr;
+    remoteAddr.sin_len = sizeof(remoteAddr);
+    remoteAddr.sin_family = AF_INET;
+    remoteAddr.sin_port = htons(161);
+    const char *ipCStr = [self.ipStr UTF8String];
+    inet_pton(AF_INET, ipCStr, &remoteAddr.sin_addr);
+
+    return [NSData dataWithBytes:&remoteAddr length:remoteAddr.sin_len];
+};
+
 -(void)start {