Re: [hylafax-users] about HylaFAX API - what is going on in port command?

["HALLOWELL,KARL (HP-Cupertino,ex1)" <karl_hallowell@hp.com>]

I found an April 1997 article on the mailing list about this (at
http://www.hylafax.org/archive/1997-04/msg00059.html). It was the last entry
(of a hundred!), honest.


Karl Hallowell          karl_hallowell@hp.com

> -----Original Message-----
> From: HALLOWELL,KARL (HP-Cupertino,ex1) [mailto:karl_hallowell@hp.com]
> Sent: Tuesday, July 25, 2000 11:07 AM
> To: Hylafax Users
> Subject: [hylafax-users] about HylaFAX API - what is going on in port
> command?
> 
> 
> I have a question about the FTP-based protocol used by HylaFAX and its
> clients. For most client commands (viewed using -vv option), 
> the output
> indicates that a "port" command is being called. Reading the 
> man page on
> hfaxd, I see that port is "specify data connection port". My 
> server is on
> localhost (127.0.0.1) and listening to port 4559. If I were 
> defining port I
> would think that "port 127,0,0,1,17,207" would be correct 
> where "17,207" is
> a base-256 number (ie, 17*256+207 = 4559). However, what I'm 
> seeing is that
> the last two numbers are acting as a counter. Each port 
> command increments
> these two numbers (I assume that a "port 127,0,0,1,5,255" 
> would be followed
> by "port 127,0,0,1,6,0"). What is going on here? What do these numbers
> specify?
> 
> 
> Karl Hallowell          karl_hallowell@hp.com
> 
> 
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