[Opensim-dev] external host name

[Paul Fishwick]

Yes, this sounds good - I recently put my home computer's IP into
a hostname via the free service by dyndns.com. Then, I use the
hostname throughout for opensim. This is great considering
that periodically (namely, on a router reboot), the router will request
a new IP from Cox Cable. By using my hostname, I avoid changing
any config, ini, or region files.
-p

Melanie wrote:
> A host name can also be an IP address. IP addresses and hostnames 
> are interchangable and we can't assume DNS presence. So, the field 
> should accept a name or IP, and resolve names, like almost 
> everything else on the internet does.
>
> Melanie
>
>
> Cristina Videira Lopes wrote:
>   
>> The thing is that this can potentially create a RegionInfo data 
>> structure with
>>            nRegionInfo.ExternalHostName = regionData.IPADDR;
>>
>> This is inconsistent with certain queries on the Grid server, like "give 
>> me all my neighbors" which may send host names.
>>
>> So, back to the point: someone needs to decide what is it that 
>> RegionInfo.ExternalHostName  is supposed to hold.
>>
>> Teravus Ovares wrote:
>>     
>>> RegionUpData is my fault, and spawned from compatibility issues with
>>> .NET remoting and Mono remoting with complex types.  It is only used
>>> to notify a neighbor region that 'this region is up'
>>>
>>> Best Regards
>>>
>>> Teravus
>>>
>>> On 12/11/08, Cristina Videira Lopes <lopes at ics.uci.edu> wrote:
>>>   
>>>       
>>>> Things are very messy right now. You can search for "sim_ip", for example,
>>>> which is used in chatting with the grid server, and where it is being
>>>> converted to an IP address in about half of the cases.
>>>>
>>>> To compensate, and before I noticed this inconsistency, Homer introduced
>>>> another field called "sim_host", so not to mess with what was already there,
>>>> that is supposed to carry the external host name, but this only works up to
>>>> the point in which RegionInfo data structures are created. At that point, we
>>>> need to decide what to place in m_externalHostName, sim_ip or sim_host.
>>>> Which means changes in OGS1.
>>>>
>>>> I also noticed that there is yet another data structure called RegionUpData
>>>> that uses IP addresses.
>>>>
>>>> So, messy. Someone should decide what this field is supposed to be, and make
>>>> it a rule.
>>>>
>>>> Charles Krinke wrote:
>>>>
>>>> Dear Diva:
>>>>
>>>> You have a very good point and I would support harmonizing to one notion
>>>> even at the expense of breaking some things for a while.
>>>>
>>>> In fact, if someone can identify what some of those things are, or come up
>>>> with a couple of search strings or grep expressions, I would like to look at
>>>> the anomalies myself.
>>>>
>>>> +1 on external_host_name
>>>>
>>>> Charles
>>>>
>>>> ________________________________
>>>>
>>>>
>>>> From: Cristina Videira Lopes <lopes at ics.uci.edu>
>>>> To: opensim-dev at lists.berlios.de
>>>> Sent: Thursday, December 11, 2008 2:42:05 PM
>>>> Subject: [Opensim-dev] external host name
>>>>
>>>> It turns out that a lot of problems with CAPs have to do with
>>>> inconsistencies surrounding the URL of the seed cap. Specifically, in
>>>> some cases we're producing URLs with hostnames, other times we're
>>>> producing URLs with IP addresses, for example:
>>>>
>>>> http://ucigrid03.nacs.uci.edu:9000/CAPS/4cfc94fa-09be-409b-b136-cda2cdde0000/
>>>> vs.
>>>> MailScanner has detected a possible fraud attempt from "128.200.71.43:9000"
>>>> claiming to be MailScanner warning: numerical links are often malicious:
>>>> http://128.200.71.43:9000/CAPS/4cfc94fa-09be-409b-b136-cda2cdde0000/
>>>>
>>>> The client is not smart enough to test if this is the same host, it
>>>> assumes it isn't, so it decides someone's trying to game it.
>>>>
>>>> The inconsistencies are all over the code in OpenSim, and they pertain
>>>> to the use of ExternalHostName in several data s! tructures. In some
>>>> cases, an explicit conversion to IP addresses is made.
>>>>
>>>> We should converge to one single thing. And I believe that thing should
>>>> be whatever it is given in external_host_name config. Is this right?
>>>> However, I am a bit afraid this is going to break 17 different things...
>>>>
>>>> Crista
>>>>
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>>>> ________________________________
>>>>
>>>>     
>>>>         
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>>
>>
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-- 
Paul Fishwick, PhD
Professor and Director, Digital Arts and Sciences Programs
University of Florida
Computer & Information Science and Eng. Dept.
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