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On Wed, Dec 15, 2004 at 10:43:36PM +0100, Hubert Feyrer wrote:
> I guess the Offset would give the major/minor number, but -1 is probably 
> not the right one. Also, unloading paniced the system (dunno how, I was in 
> X).

I took the 1.15 from CVS, messed with it, and now I'm using it to bridge
my ethernet over udp over ipsec over wlan to my laptop:

gatekeeper: {3} modstat
Type    Id   Offset Loadaddr Size Info     Rev Module Name
DEV       0  -1/165 c3840000 0008 c3841ae0   2 ethfoo
gatekeeper: {4} ifconfig ethfoo0
ethfoo0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        address: f0:0b:a4:63:06:c2
        media: Ethernet autoselect
        inet6 fe80::f20b:a4ff:fe63:6c2%ethfoo0 prefixlen 64 scopeid 0x7
gatekeeper: {5}

To make it compile I had to violently rip out parts of the driver and
put some stuff from -current in, but it seems to work except for
destroying the clone and unloading the module. I did not really
understand what I was doing, I just tried to get rid of compiler errors
and warnings.

It would be great to see ethfoo/tap in 2.1, it is a really useful
feature.

-- 
%SYSTEM-F-ANARCHISM, The operating system has been overthrown

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--- ethfoo/ethfoo/ethfoo_lkm.c	2004-12-18 14:06:41.000000000 +0100
+++ ethfoo-messed/ethfoo/ethfoo_lkm.c	2004-12-18 12:29:19.000000000 +0100
@@ -169,6 +169,9 @@
 static int	ethfoo_fops_poll(struct file *, int, struct proc *);
 static int	ethfoo_fops_kqfilter(struct file *, struct knote *);
 
+int	fnullop_fcntl(struct file *, u_int, void *, struct proc *);
+int	fbadop_stat(struct file *, struct stat *, struct proc *);
+
 static const struct fileops ethfoo_fileops = {
 	ethfoo_fops_read,
 	ethfoo_fops_write,
@@ -181,7 +184,7 @@
 };
 
 /* Helper for cloning open() */
-static int	ethfoo_dev_cloner(struct proc *);
+/*static int	ethfoo_dev_cloner(struct proc *);*/
 
 /* Character device routines */
 static int	ethfoo_cdev_open(dev_t, int, int, struct proc *);
@@ -251,7 +254,7 @@
 
 struct if_clone ethfoo_cloners = IF_CLONE_INITIALIZER("ethfoo",
 					ethfoo_clone_create,
-					ethfoo_clone_destroy);
+					(void (*)(struct ifnet *))ethfoo_clone_destroy);
 
 /* Helper functionis shared by the two cloning code paths */
 static struct ethfoo_softc *	ethfoo_clone_creator(int);
@@ -731,7 +734,7 @@
 	cf->cf_unit = unit;
 	cf->cf_fstate = FSTATE_STAR;
 
-	return (struct ethfoo_softc *)config_attach_pseudo(cf);
+	return (struct ethfoo_softc *)config_attach_pseudo(ethfoo_cd.cd_name, unit);
 }
 
 /*
@@ -785,10 +788,10 @@
 ethfoo_cdev_open(dev_t dev, int flags, int fmt, struct proc *p)
 {
 	struct ethfoo_softc *sc;
-
+/*
 	if (minor(dev) == ETHFOO_CLONER)
 		return ethfoo_dev_cloner(p);
-
+*/
 	sc = (struct ethfoo_softc *)device_lookup(&ethfoo_cd, minor(dev));
 	if (sc == NULL)
 		return (ENXIO);
@@ -821,7 +824,7 @@
  * externally accessed through the corresponding device node with the cdevsw
  * interface.
  */
-
+/*
 static int
 ethfoo_dev_cloner(struct proc *p)
 {
@@ -842,7 +845,7 @@
 
 	return fdclone(p, fp, fd, &ethfoo_fileops, (void *)(intptr_t)sc->sc_dev.dv_unit);
 }
-
+*/
 /*
  * While all other operations (read, write, ioctl, poll and kqfilter) are
  * really the same whether we are in cdevsw or fileops mode, the close()
@@ -1494,3 +1497,20 @@
 	*--cp = 0;
 	return (dest);
 }
+
+/* ARGSUSED */
+int
+fnullop_fcntl(struct file *fp, u_int cmd, void *data, struct proc *p)
+{
+	if (cmd == F_SETFL)
+		return 0;
+
+	return EOPNOTSUPP;
+}
+
+/* ARGSUSED */
+int
+fbadop_stat(struct file *fp, struct stat *sb, struct proc *p)
+{
+	return EOPNOTSUPP;
+}

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