Solaris winsock support

Dan Kegel dank at kegel.com
Sat Sep 8 11:13:23 CDT 2001


Robert Lunnon wrote:
> Looking about in the code WsControl grubs about in the /proc filesystem to
> get the names of, and count the number of network interfaces. Since /Proc
> only hosts processes on Solaris this constitutes a linux dependancy we don't
> need. Studying the ifconfig source gives another possibility instead which
> look like it may be more portable using ioctl SIOCGIFCONF on an arbitrary IP
> socket
> 
> The return from this call is a structure containing the length of the reply
> buffer, which seems to contains an array of ifreq structures (one for each
> interface) which contains among other things the name of the interface. By
> dividing the size of the buffer by the size of the returned objects we know
> how many interfaces there are...
> 
> Questions
> Anyone know if this is Is this workable ?
> Is this workable on linux, (I ask because I don't have linux and don't know
> linux ioctl implementation details)?

SIOCGIFCONF isn't in the Single Unix Spec, V2, but it does appear to be in Linux.
It also appears to be in Irix.  Looks like a widely used ioctl.

But note:

http://mail-index.netbsd.org/tech-net/2001/05/09/0001.html
http://www.geocrawler.com/archives/3/154/2000/2/0/3362774/
http://www.geocrawler.com/archives/3/495/2000/10/0/4586144/
  SIOCGIFCONF is supported by netbsd, but is hard to use
  gotchas because size of reply larger than expected

http://mail.gnu.org/pipermail/bug-inetutils/2001-January/000055.html
  glibc supports SIOCGIFCONF, but not for down or virtual interfaces

http://www.cygwin.com/ml/cygwin/2001-03/msg00518.html
  cygwin supports it (so we can run wine on cygwin on windows :-)

- Dan

-- 
"I have seen the future, and it licks itself clean." -- Bucky Katt




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