if_attach now puts interfaces on the end of the q

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

/*      if.c    4.8     82/02/03        */

#include "../h/param.h"
#include "../h/systm.h"
#include "../net/in.h"
#include "../net/in_systm.h"
#include "../net/if.h"

ifinit()
{
       register struct ifnet *ifp;

       for (ifp = ifnet; ifp; ifp = ifp->if_next)
               if (ifp->if_init)
                       (*ifp->if_init)();
}

ifubareset(uban)
       int uban;
{
       register struct ifnet *ifp;

       for (ifp = ifnet; ifp; ifp = ifp->if_next)
               if (ifp->if_ubareset)
                       (*ifp->if_ubareset)(uban);
}

if_attach(ifp)
       struct ifnet *ifp;
{
       register struct ifnet **p = &ifnet;

COUNT(IF_ATTACH);
       while (*p)
               p = &((*p)->if_next);
       *p = ifp;
}

/*ARGSUSED*/
struct ifnet *
if_ifwithaddr(in)
       struct in_addr in;
{
       register struct ifnet *ifp;

COUNT(IF_IFWITHADDR);
       for (ifp = ifnet; ifp; ifp = ifp->if_next)
               if (ifp->if_addr.s_addr == in.s_addr)
                       break;
       return (ifp);
}

/*ARGSUSED*/
struct ifnet *
if_ifonnetof(in)
       struct in_addr in;
{
       register struct ifnet *ifp;
       int net;

COUNT(IF_IFONNETOF);
       net = in.s_net;                 /* XXX */
       for (ifp = ifnet; ifp; ifp = ifp->if_next)
               if (ifp->if_net == net)
                       break;
       return (ifp);
}

/*ARGSUSED*/
struct ifnet *
if_gatewayfor(addr)
       struct in_addr addr;
{

COUNT(IF_GATEWAYFOR);
       return (0);
}

struct in_addr
if_makeaddr(net, host)
       int net, host;
{
       u_long addr;

       if (net < 128)
               addr = (net << 24) | host;
       else if (net < 65536)
               addr = (net << 16) | host;
       else
               addr = (net << 8) | host;
#ifdef vax
       addr = htonl(addr);
#endif
       return (*(struct in_addr *)&addr);
}