Re: Ping host and port
Re: Ping host and port
- Subject: Re: Ping host and port
- From: Dave Carrigan <email@hidden>
- Date: Sun, 7 Nov 2010 13:52:11 -0800
On Nov 7, 2010, at 1:35 PM, Tom Jones wrote:
> I'm looking for a simple way to ping a host and a specific port on that host. I have SCNetworkCheckReachabilityByName working just fine but I really need to test to see if the port is active.
ICMP (ping) doesn't use ports. I assume you actually want to determine if a host is listening on a TCP or UDP port. Actually, there is no real way to know if a host is listening on a UDP port unless you also know what particular kind of service is associated with that port and know what to look for when a host receives UDP packets on the port in question. So most likely you mean a TCP port. For that, a combination of socket(2) and connect(2) should tell you what you need to know.
--
Dave Carrigan
email@hidden
Seattle, WA, USA
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