update ATM driver. (base version: midway.c 1.67 --> 1.68)

several new features are added:
	- support vc/vp shaping
	- support pvc shadow interface

code cleanup:
	- remove WMAYBE related code.  ENI WMAYBE DMA doen't work.
	- remove updating if_lastchange for every packet.
	- BPF related code is moved to midway.c as it should be.
	  (bpfwrite should work if atm_pseudohdr and LLC/SNAP are
	  prepended.)
	- BPF link type is changed to DLT_ATM_RFC1483.
	  BPF now understands only LLC/SNAP!! (because bpf can't
	  handle variable link header length.)
	  It is recommended to use LLC/SNAP instead of NULL
	  encapsulation for various reasons.  (BPF, IPv6,
	  interoperability, etc.)

the code has been used for months in ALTQ and KAME IPv6.

OKed by phk long time ago.

1 files changed, 13 insertions, 1 deletions

diff --git a/sys/net/bpf.c b/sys/net/bpf.c
index 136edf0..c65bbff 100644
--- a/sys/net/bpf.c
+++ b/sys/net/bpf.c
@@ -37,7 +37,7 @@
  *
  *      @(#)bpf.c	8.2 (Berkeley) 3/28/94
  *
- * $Id: bpf.c,v 1.38 1998/02/20 13:46:57 bde Exp $
+ * $Id: bpf.c,v 1.39 1998/06/07 17:12:01 dfr Exp $
  */
 
 #include "bpfilter.h"
@@ -197,6 +197,18 @@ bpf_movein(uio, linktype, mp, sockp, datlen)
 		hlen = 0;
 		break;
 
+#ifdef __FreeBSD__
+	case DLT_ATM_RFC1483:
+		/*
+		 * en atm driver requires 4-byte atm pseudo header.
+		 * though it isn't standard, vpi:vci needs to be
+		 * specified anyway.
+		 */
+		sockp->sa_family = AF_UNSPEC;
+		hlen = 12; 	/* XXX 4(ATM_PH) + 3(LLC) + 5(SNAP) */
+		break;
+#endif
+
 	default:
 		return (EIO);
 	}