UDP not connecting on Mac OSX Leopard

[Jim Ault]

Would calling shell commands on Leopard be a good test of Rev using  
UDP ?
Rev 2.7.2 does TCP on Leopard, not UDP
Rev 2.9.0 does not do UDP on Leopard for 127.0.0.1 (localhost)

If the shell commands using Terminal don't work properly, then it  
would not be a Rev problem.
Just a thought

Jim Ault
Las Vegas


On Jul 7, 2009, at 5:05 PM, Alex Tweedly wrote:

> Jim Ault wrote:
>
> Jim - I could preface each part of my reply with .... "Sorry I don't  
> have a Mac w/ Leopard to check,"
>> I don't seem to be able to make the easy connections between Macs  
>> running OSX 10.5 using Alex Tweedly's companion stacks
>> UDP Echo Client
>> UDP Echo Server
>>
>> I have set the fire wall in OSX to 'allow all incoming connections',
> ...check, but I wouldn't be surprised if that meant "allow incoming  
> TCP connections", and there might be a separate setting for UDP.
>> both computers have a static IP address,
>> are connected to the internet using a switch (not a router)
>>
> No, I don't believe that. (Almost) no-one is connected to the  
> Internet without a router - it's just a question of where the router  
> is. Do you mean that the computers are both connected to a switch -  
> and behind that is the router and Internet connection ? And  
> therefore the two should be communicating locally ?
>> but UDP traffic between them does not test positive.
>> This has not been a problem in the past using OSX 10.4 (Tiger)
>>
>> [1]
>> compiled - UDP Echo Client running as an app on computer B
>> UDP Echo Server in Rev 2.7.2 on computer A
>>
>> [2]
>> compiled - UDP Echo Client running as an app on computer B
>> UDP Echo Server in Rev 2.9.0 on computer A
>>
> Do you still have 10.4 systems around so you can try client on 10.4  
> and server on 10.5, etc. ?
>> Can anyone shed some light on how to make this work?
> Stupid question - does it work with client and server on the same  
> computer ?
> Are they on the same subnet ?
> Can you do a ping from one to the other ?
> How about a traceroute - just to check there is a direct connection ?
> If you clear the arp cache, then run the client, does the sever then  
> show up in the arp cache ?
>  (in a terminal window - "arp -a" to see the cache, "arp -d -a" to  
> clear it)
>
>
> I'll try to find a Leopard system tomorrow to play with it ....
>
> -- Alex.