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To: hackers@freefall.cdrom.com
Subject: Jordan Hayes: Re: Virtual top-level home pages on the same machine
Date: Tue, 10 Jan 1995 19:06:42 -0800
Message-ID: <14444.789793602@freefall.cdrom.com>
From: "Jordan K. Hubbard" <jkh@freefall.cdrom.com>
Sender: hackers-owner@FreeBSD.org
Precedence: bulk

Anyone interested in this?
------- Forwarded Message
From: jordan@heuristicrat.com (Jordan Hayes)
Subject: Re: Virtual top-level home pages on the same machine

[ by popular demand; I did this a few months ago (a Sparc I have here
  has 10 addresses!  Thanks, Tim!).  I have since seen a patch from
  some luser on the net that's hundreds of lines long.  I couldn't even
  tell if it did what I thought it did.  Anyway, here's what I did.  I
  did something similar to inetd so that you can have multiple inetd's
  running in the same way.  Fun city. ]

There is a configuration item in the CERN httpd called "hostname" but
it appears not to be used for anything.  So I use that.  If you have
the CERN 1.3 source, the server lives in Daemon/Implementation.

- - In HTConfig.h (around line 45), I added a struct in_addr to the
  struct _HTServerConfig

- - In HTConfig.c (around line 1100) I initialize sc.addr.s_addr to
  INADDR_ANY

- - there's a big pile of code that parses the config file.  When you get
  to the "hostname" directive (around line 1755), I added:

	struct hostent	*hp;

	if ((hp = gethostbyname(vec[1])) != (struct hostent *)NULL)
		bcopy((char *)hp->h_addr, (char *)&sc.addr.s_addr,
		    sizeof(sc.addr.s_addr));

- - In HTDaemon.c (around line 1324) I changed the line

	sin->sin_addr.s_addr = INADDR_ANY; /* Default: any address */

  to

	sin->sin_addr.s_addr = sc.addr.s_addr;

- -----

If the "hostname" directive doesn't exist, this is a no-op; the bind()
call just listens on all interfaces.  If it does exist, and we can
resolve it (make sure there's an A record for the particular interface
that you want to listen on), it gets used instead.  Use the -r argument
to httpd to have separate config files.

Actual diffs (I lied: I added 7 lines and changed one):

===================================================================
RCS file: RCS/HTConfig.c,v
retrieving revision 1.1
diff -r1.1 HTConfig.c
1081a1082
>     struct hostent *hp;
1103a1105,1106
>     sc.addr.s_addr = INADDR_ANY;
> 
1755a1759,1761
> 	    if ((hp = gethostbyname(vec[1])) != (struct hostent *)NULL)
> 		bcopy((char *)hp->h_addr, (char *)&sc.addr.s_addr,
> 		    sizeof(sc.addr.s_addr));
===================================================================
RCS file: RCS/HTConfig.h,v
retrieving revision 1.1
diff -r1.1 HTConfig.h
45a46
>     struct in_addr	addr;		/* virtual hosts		*/
===================================================================
RCS file: RCS/HTDaemon.c,v
retrieving revision 1.1
diff -r1.1 HTDaemon.c
1324c1324
<             sin->sin_addr.s_addr = INADDR_ANY; /* Default: any address */
- ---
>             sin->sin_addr.s_addr = sc.addr.s_addr;


------- End of Forwarded Message