*** /tmp/,RCSt1a10663	Tue Mar 31 08:03:31 1992
--- if_le.c	Tue Mar 31 08:00:30 1992
***************
*** 40,45 ****
--- 40,50 ----
  
  #include <sundev/mbvar.h>
  
+ #include "bpfilter.h"
+ #if NBPFILTER > 0
+ #include "../net/bpf.h"
+ #endif
+ 
  #include <sunif/if_lereg.h>
  #include <sunif/if_levar.h>
  
***************
*** 264,269 ****
--- 269,278 ----
  	/* Do hardware-independent attach stuff. */
  	ether_attach(&es->es_if, unit, "le",
  		leinit, leioctl, leoutput, lereset);
+ #if NBPFILTER > 0
+ 	bpfattach(&es->es_bpf, &es->es_if, DLT_EN10MB, 
+ 		  sizeof(struct ether_header));
+ #endif
  	/*
  	 * attach interrupts and dma vectors
  	 */
***************
*** 1028,1033 ****
--- 1037,1049 ----
  			}
  		} while (m = m->m_next);
  
+ #if NBPFILTER > 0
+ 		{
+ 			struct le_softc *le = &le_softc[unit];
+ 			if (le->es_bpf)
+ 				bpf_mtap(le->es_bpf, m0);
+ 		}
+ #endif
  		/*
  		 * t points to the next free tmd.
  		 */
***************
*** 1384,1389 ****
--- 1400,1431 ----
  		return;
  	}
  
+ #if NBPFILTER > 0
+         /*
+          * If bpf is listening on this interface, let it see the packet 
+ 	 * before we pass it up to higher evel protocols.  
+ 	 *
+ 	 * Note that BPF doesn't currently (and hopefully never will)
+ 	 * work for trailer-encapsulated packets.  We just ignore them.
+          */
+         if (es->es_bpf && off == 0) {
+                 bpf_tap(es->es_bpf, (u_char *)header, 
+ 			length + sizeof(struct ether_header));
+ 		/*
+ 		 * If we are in promiscuous mode, we return if this
+ 		 * packet isn't for us.  This prevents NIT from seeing
+ 		 * any promiscuous packets when there is a BPF listener.
+ 		 * The IFF_PROMISC test isn't necessary but saves the
+ 		 * bcmp() calls; it's probably worthwhile.
+ 		 */
+ 		if ((es->es_if.if_flags & IFF_PROMISC) &&
+ 		    bcmp(header->ether_dhost.ether_addr_octet,
+ 			 es->es_enaddr.ether_addr_octet, 6) != 0 &&
+ 		    bcmp(header->ether_dhost.ether_addr_octet,
+ 			 etherbroadcastaddr.ether_addr_octet, 6) != 0)
+ 			return;
+ 	}
+ #endif
  	/*
  	 * Pull packet off interface.  Off is nonzero if packet has
  	 * trailing header; copy_to_mbufs will then force this header