From: Mikael Brockman <mikael@...>
Date: 2004-10-09T11:58:03+09:00
Subject: Re: [ANN] DNS Service Discovery (aka Rendezvous) bindings for Ruby

Charles Mills <cmills@freeshell.org> writes:

> On Oct 8, 2004, at 4:01 PM, Mikael Brockman wrote:
> > I don't understand how to install it on Linux.  setup.rb is looking for
> > -lmdns, but I can't find any shared libraries in the mDNSResponder
> > tree.
> >
> 
> Building on a mac is easy :)
> Figuring out how to build on linux was a pain :(
> 
> But it isn't that bad.  It looks like they renamed libmdns to libdns_sd.
> So, make this change in extconf.rb:
> ## replace ##
>    have_library( "mdns", "DNSServiceRefSockFD" ) or
>      abort( "can't find rendezvous library" )
> ## with ##
>    have_library( "mdns", "DNSServiceRefSockFD" ) or
>    have_library( "dns_sd", "DNSServiceRefSockFD" ) or
>      abort( "can't find rendezvous library" )
> ########
> then:
> $ ruby extconf.rb
> checking for DNSServiceRefSockFD() in -lmdns... no
> checking for DNSServiceRefSockFD() in -ldns_sd... yes
> checking for dns_sd.h... yes
> checking for htons()... yes
> checking for ntohs()... yes
> checking for if_indextoname()... yes
> checking for if_nametoindex()... yes
> creating Makefile
> $ make
> <snip>
> $ /etc/init.d/mdns start  # if you don't have it started already
> Starting Apple Darwin Multicast DNS / DNS Service Discovery daemon:
> mdnsd.
> $ cd ../test
> $ ruby test_resolve_ichat.rb
> Press <return> to start (and <return to end):
> ############ HIT ENTER ###########
> ######## OPEN ICHAT on my MAC ####
> Browsing: #<DNSSD::BrowseReply
> boson@rodin._presence._tcp.local. interface:eth0>
> Adding: #<DNSSD::ResolveReply
> boson@rodin._presence._tcp.local. interface:eth0
> target:rodin.local.:5298 {"status"=>"avail", "vc"=>"A!",
> "last"=>"Mills", "txtvers"=>"1", "AIM"=>"charlesmmills",
> "version"=>"1", "phsh"=>"41e70d70b1b37798ff87f753a05ba8025355b4a4",
> "1st"=>"Charles", "port.p2pj"=>"5298", "email"=>"hidden from spam"}>
> ####### QUIT ICHAT ###############
> Browsing: #<DNSSD::BrowseReply
> boson@rodin._presence._tcp.local. interface:eth0>
> Removing: #<DNSSD::ResolveReply
> boson@rodin._presence._tcp.local. interface:eth0
> target:rodin.local.:5298 {"status"=>"avail", "vc"=>"A!",
> "last"=>"Mills", "txtvers"=>"1", "AIM"=>"charlesmmills",
> "version"=>"1", "phsh"=>"41e70d70b1b37798ff87f753a05ba8025355b4a4",
> "1st"=>"Charles", "port.p2pj"=>"5298", "email"=>"hidden from spam"}>
> 
> ############ HIT ENTER ###########
> <#DNSSD::Service (stopped)>
> $ echo "beautiful, it worked"
> $
> 
> I am running gentoo linux on a PC if it matters.
> 
> If you still have problems try getting the latest version of
> mDNSResponder from CVS.  Instructions here:
> http://developer.apple.com/darwin/tools/cvs/howto.html
> There needs to be a better way to do this, it is really a pain to get,
> registration required, etc. :(
> 
> Other stuff I found out trying to get this to work:
> 
> Apples DNS DS libs:
> http://developer.apple.com/darwin/projects/rendezvous/
> 
> Other DNS SD libs (that won't work with the Ruby bindings and may be
> packed for your linux distro):
> http://jmdns.sourceforge.net/
> http://www.porchdogsoft.com/products/howl/GettingStarted.html

Thanks, Charlie!  I think the release doesn't build anything but a
couple of toy clients on Linux.  The code in CVS built libraries,
though.