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* @(#)if_loop.c 7.13 (Berkeley) 4/26/91
* Loopback interface driver for protocol testing and timing.
#include "../net/if_types.h"
#include "../net/netisr.h"
#include "../net/route.h"
#include "machine/mtpr.h"
#include "../netinet/in.h"
#include "../netinet/in_systm.h"
#include "../netinet/in_var.h"
#include "../netinet/ip.h"
#include "../netns/ns_if.h"
#include "../netiso/iso.h"
#include "../netiso/iso_var.h"
int looutput(), loioctl();
register struct ifnet
*ifp
= &loif
;
ifp
->if_flags
= IFF_LOOPBACK
;
ifp
->if_output
= looutput
;
looutput(ifp
, m
, dst
, rt
)
register struct rtentry
*rt
;
register struct ifqueue
*ifq
= 0;
if ((m
->m_flags
& M_PKTHDR
) == 0)
panic("looutput no HDR");
if (rt
&& rt
->rt_flags
& RTF_REJECT
) {
return (rt
->rt_flags
& RTF_HOST
? EHOSTUNREACH
: ENETUNREACH
);
ifp
->if_obytes
+= m
->m_pkthdr
.len
;
switch (dst
->sa_family
) {
printf("lo%d: can't handle af%d\n", ifp
->if_unit
,
ifp
->if_ibytes
+= m
->m_pkthdr
.len
;
rt
->rt_rmx
.rmx_mtu
= LOMTU
;
* Process an ioctl request.
register struct ifnet
*ifp
;
register struct ifaddr
*ifa
;
ifa
= (struct ifaddr
*)data
;
if (ifa
!= 0 && ifa
->ifa_addr
->sa_family
== AF_ISO
)
ifa
->ifa_rtrequest
= lortrequest
;
* Everything else is done at a higher level.