#ifndef lint
static char sccsid[] = "@(#)if.c 1.1 92/07/30 Copyr 1986 Sun Micro";
#endif
#include <sys/param.h>
#include "boot/systm.h"
#include <sys/socket.h>
#include <sys/socketvar.h>
#include "boot/protosw.h"
#include <sys/dir.h>
#include <sys/user.h>
#include <sys/kernel.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/af.h>
#include <net/route.h>
#include <net/raw_cb.h>
#include <net/nit.h>
#include "../netinet/in.h"
int ifqmaxlen = IFQ_MAXLEN;
/*
* Network interface utility routines.
*
* Routines with if_ifwith* names take sockaddr *'s as
* parameters. Other routines take value parameters,
* e.g. if_ifonnetof takes the network number.
*/
ifinit()
{
register struct ifnet *ifp;
for (ifp = ifnet; ifp; ifp = ifp->if_next)
if (ifp->if_init) {
(*ifp->if_init)(ifp->if_unit);
if (ifp->if_snd.ifq_maxlen == 0)
ifp->if_snd.ifq_maxlen = ifqmaxlen;
}
}
/*
* Attach an interface to the
* list of "active" interfaces.
*/
if_attach(ifp)
struct ifnet *ifp;
{
register struct ifnet **p = &ifnet;
while (*p)
p = &((*p)->if_next);
*p = ifp;
ifp->if_next = (struct ifnet *)0;
}
/*
* Find an interface using a specific address family
*/
struct ifnet *
if_ifwithaf(af)
register int af;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
for (ifp = ifnet; ifp; ifp = ifp->if_next) {
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr.sa_family == af)
return (ifp);
}
}
return ((struct ifnet *)0);
}
/*
* Find an UP interface using a specific address family
*/
struct ifnet *
if_ifwithafup(af)
register int af;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
for (ifp = ifnet; ifp; ifp = ifp->if_next)
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
if ((ifp->if_flags & IFF_UP) && ifa->ifa_addr.sa_family == af)
return (ifp);
}
return ((struct ifnet *)0);
}
/*
* Locate an interface based on a complete address.
*/
/*ARGSUSED*/
struct ifnet *
if_ifwithaddr(addr)
struct sockaddr *addr;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
#define equal(a1, a2) \
(bcmp((caddr_t)((a1)->sa_data), (caddr_t)((a2)->sa_data), 14) == 0)
for (ifp = ifnet; ifp; ifp = ifp->if_next) {
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr.sa_family != addr->sa_family)
continue;
if (equal(&ifa->ifa_addr, addr))
return (ifp);
if ((ifp->if_flags & IFF_BROADCAST) &&
equal(&ifa->ifa_broadaddr, addr))
return (ifp);
}
}
return ((struct ifnet *)0);
}
/*
* Locate an interface based on a complete destination.
*/
/*ARGSUSED*/
struct ifnet *
if_ifwithdstaddr(addr)
struct sockaddr *addr;
{
register struct ifnet *ifp;
register struct ifnet *bifp = (struct ifnet *)0;
register struct ifaddr *ifa;
for (ifp = ifnet; ifp; ifp = ifp->if_next) {
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr.sa_family != addr->sa_family)
continue;
if ((ifp->if_flags & IFF_POINTOPOINT) &&
equal(&ifa->ifa_dstaddr, addr))
return (ifp);
if (equal(&ifa->ifa_addr, addr))
return (ifp);
if ((ifp->if_flags & IFF_BROADCAST) &&
equal(&ifa->ifa_broadaddr, addr))
bifp = ifp;
}
}
return (ifp==0 ? bifp : ifp);
}
/*
* Find an interface which reaches a specific destination. If many, choice
* is first found.
*/
struct ifnet *
if_ifwithnet(addr)
register struct sockaddr *addr;
{
register struct ifnet *ifp;
register u_int af = addr->sa_family;
register int (*netmatch)();
register struct ifaddr *ifa;
if (af >= AF_MAX)
return (0);
netmatch = afswitch[af].af_netmatch;
for (ifp = ifnet; ifp; ifp = ifp->if_next) {
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
if (af != ifa->ifa_addr.sa_family)
continue;
if (ifp->if_flags&IFF_POINTOPOINT) {
if (equal(&ifa->ifa_dstaddr, addr))
return (ifp);
} else if ((*netmatch)(addr, &ifa->ifa_addr))
return (ifp);
}
}
return ((struct ifnet *)0);
}
/*
* Set a new interface address.
* Called by ND address assignment as well as above
* XXX Most of what the drivers do is device independent!
*/
if_setaddr(ifp, sa)
register struct ifnet *ifp;
struct sockaddr *sa;
{
if (ifp->if_ioctl == 0)
return (EOPNOTSUPP);
return ((*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)sa));
}
