missing include

[unix-history] / usr / src / sys / net / if_loop.c

/*      if_loop.c       4.11    82/04/16        */

/*
* Loopback interface driver for protocol testing and timing.
*/

#include "../h/param.h"
#include "../h/systm.h"
#include "../h/mbuf.h"
#include "../h/socket.h"
#include "../net/in.h"
#include "../net/in_systm.h"
#include "../net/if.h"
#include "../net/ip.h"
#include "../net/ip_var.h"
#include "../h/mtpr.h"
#include "../net/route.h"
#include <errno.h>

#define LONET   127
#define LOMTU   (1024+512)

struct  ifnet loif;
int     looutput();

loattach()
{
       register struct ifnet *ifp = &loif;
       register struct sockaddr_in *sin;

COUNT(LOATTACH);
       ifp->if_name = "lo";
       ifp->if_mtu = LOMTU;
       ifp->if_net = LONET;
       sin = (struct sockaddr_in *)&ifp->if_addr;
       sin->sin_family = AF_INET;
       sin->sin_addr = if_makeaddr(ifp->if_net, 0);
       ifp->if_flags = IFF_UP;
       ifp->if_output = looutput;
       if_attach(ifp);
       if_rtinit(ifp, RTF_DIRECT|RTF_UP);
}

looutput(ifp, m0, dst)
       struct ifnet *ifp;
       struct mbuf *m0;
       struct sockaddr *dst;
{
       int s = splimp();
       register struct ifqueue *ifq;

COUNT(LOOUTPUT);
       ifp->if_opackets++;
       switch (dst->sa_family) {

#ifdef INET
       case AF_INET:
               ifq = &ipintrq;
               if (IF_QFULL(ifq)) {
                       IF_DROP(ifq);
                       m_freem(m0);
                       splx(s);
                       return (ENOBUFS);
               }
               IF_ENQUEUE(ifq, m0);
               schednetisr(NETISR_IP);
               break;
#endif
       default:
               splx(s);
               printf("lo%d: can't handle af%d\n", ifp->if_unit,
                       dst->sa_family);
               m_freem(m0);
               return (EAFNOSUPPORT);
       }
       ifp->if_ipackets++;
       splx(s);
       return (0);
}