Re: Test for TCP port
Re: Test for TCP port
- Subject: Re: Test for TCP port
- From: "Heizer, Charles" <email@hidden>
- Date: Fri, 08 Apr 2011 20:04:09 -0700
- Acceptlanguage: en-US
- Thread-topic: Test for TCP port
Thanks,
This is what I kind of suspected. Are there any wrappers around bsd socket to make it easier?
Thanks,
Charles
On Apr 8, 2011, at 5:17 PM, Dave Carrigan wrote:
>
> On Apr 8, 2011, at 3:26 PM, Heizer, Charles wrote:
>
>> What is the best way to test to see if a TCP port is reachable and will answer connections? I was trying to use NSSocketPort and NSConnection but I'm not getting a valid connection.
>
> You have to connect to it. Unfortunately, neither NSSocketPort nor NSConnection attempt to connect until you send data, so with those, you have no way of immediately knowing that anything is actually listening. The best way is to get down a level and use socket(2) and friends.
>
> --
> Dave Carrigan
> email@hidden
> Seattle, WA, USA
>
--
Charles Heizer
Systems Management Solutions Group
Lawrence Livermore National Laboratory
P: 925-422-0197
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