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nusb/ether: dont forward loopback packets on bridges, remove read nonblocking hack

--- a/sys/src/cmd/nusb/ether/ether.c

+++ b/sys/src/cmd/nusb/ether/ether.c

@@ -58,8 +58,6 @@

 	Block		**qt;

 	int		size;

-

-	int		nb;

 };

 struct Conn

@@ -262,12 +260,6 @@

 	d = r->fid->aux;

 	qlock(d);

-	if(d->q==nil && d->nb){

-		qunlock(d);

-		r->ofcall.count = 0;

-		respond(r, nil);

-		return;

-	}

 	r->aux = nil;

 	*d->rt = r;

 	d->rt = (Req**)&r->aux;

@@ -278,18 +270,12 @@

 static void

 writeconndata(Req *r)

 {

-	Dq *d;

 	void *p;

 	int n;

 	Block *b;

-	d = r->fid->aux;

 	p = r->ifcall.data;

 	n = r->ifcall.count;

-	if((n == 11) && memcmp(p, "nonblocking", n)==0){

-		d->nb = 1;

-		goto out;

-	}

 	/* minimum frame length for rtl8150 */

 	if(n < 60)

@@ -315,7 +301,6 @@

 	etheriq(b, 0);

-out:

 	r->ofcall.count = r->ifcall.count;

 	respond(r, nil);

 }

@@ -725,7 +710,7 @@

 		qlock(c);

 		if(!c->used)

 			goto next;

-		if(c->bridge && !wire && !fromme)

+		if(c->bridge && (tome || !wire && !fromme))

 			goto next;

 		if(c->type > 0 && c->type != t)

 			goto next;