-/* if.c 4.4 81/11/29 */
+/*
+ * Copyright (c) 1980, 1986 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of California at Berkeley. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission. This software
+ * is provided ``as is'' without express or implied warranty.
+ *
+ * @(#)if.c 7.2 (Berkeley) %G%
+ */
-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../net/in.h"
-#include "../net/in_systm.h"
-#include "../net/if.h"
+#include "param.h"
+#include "systm.h"
+#include "socket.h"
+#include "socketvar.h"
+#include "protosw.h"
+#include "dir.h"
+#include "user.h"
+#include "kernel.h"
+#include "ioctl.h"
+#include "errno.h"
-/*ARGSUSED*/
-struct ifnet *
-if_ifwithaddr(in)
- struct in_addr in;
+#include "if.h"
+#include "af.h"
+
+#include "ether.h"
+
+int ifqmaxlen = IFQ_MAXLEN;
+
+/*
+ * Network interface utility routines.
+ *
+ * Routines with ifa_ifwith* names take sockaddr *'s as
+ * parameters.
+ */
+
+ifinit()
{
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);
+ if (ifp->if_snd.ifq_maxlen == 0)
+ ifp->if_snd.ifq_maxlen = ifqmaxlen;
+ if_slowtimo();
+}
+
+#ifdef vax
+/*
+ * Call each interface on a Unibus reset.
+ */
+ifubareset(uban)
+ int uban;
+{
+ register struct ifnet *ifp;
+
+ for (ifp = ifnet; ifp; ifp = ifp->if_next)
+ if (ifp->if_reset)
+ (*ifp->if_reset)(ifp->if_unit, uban);
+}
+#endif
+
+/*
+ * 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;
}
+/*
+ * Locate an interface based on a complete address.
+ */
/*ARGSUSED*/
-struct ifnet *
-if_ifonnetof(in)
- struct in_addr in;
+struct ifaddr *
+ifa_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 (ifa);
+ if ((ifp->if_flags & IFF_BROADCAST) &&
+ equal(&ifa->ifa_broadaddr, addr))
+ return (ifa);
+ }
+ return ((struct ifaddr *)0);
+}
+/*
+ * Locate the point to point interface with a given destination address.
+ */
+/*ARGSUSED*/
+struct ifaddr *
+ifa_ifwithdstaddr(addr)
+ struct sockaddr *addr;
+{
+ register struct ifnet *ifp;
+ register struct ifaddr *ifa;
+
+ for (ifp = ifnet; ifp; ifp = ifp->if_next)
+ if (ifp->if_flags & IFF_POINTOPOINT)
+ for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
+ if (ifa->ifa_addr.sa_family != addr->sa_family)
+ continue;
+ if (equal(&ifa->ifa_dstaddr, addr))
+ return (ifa);
+ }
+ return ((struct ifaddr *)0);
+}
+
+/*
+ * Find an interface on a specific network. If many, choice
+ * is first found.
+ */
+struct ifaddr *
+ifa_ifwithnet(addr)
+ register struct sockaddr *addr;
+{
+ register struct ifnet *ifp;
+ register struct ifaddr *ifa;
+ register u_int af = addr->sa_family;
+ register int (*netmatch)();
+
+ 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 (ifa->ifa_addr.sa_family != addr->sa_family)
+ continue;
+ if ((*netmatch)(&ifa->ifa_addr, addr))
+ return (ifa);
+ }
+ return ((struct ifaddr *)0);
+}
+
+#ifdef notdef
+/*
+ * Find an interface using a specific address family
+ */
+struct ifaddr *
+ifa_ifwithaf(af)
+ register int af;
{
register struct ifnet *ifp;
- int net;
+ register struct ifaddr *ifa;
-COUNT(IF_IFONNETOF);
- net = in.s_net; /* XXX */
for (ifp = ifnet; ifp; ifp = ifp->if_next)
- if (ifp->if_net == net)
+ for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
+ if (ifa->ifa_addr.sa_family == af)
+ return (ifa);
+ return ((struct ifaddr *)0);
+}
+#endif
+
+/*
+ * Mark an interface down and notify protocols of
+ * the transition.
+ * NOTE: must be called at splnet or eqivalent.
+ */
+if_down(ifp)
+ register struct ifnet *ifp;
+{
+ register struct ifaddr *ifa;
+
+ ifp->if_flags &= ~IFF_UP;
+ for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
+ pfctlinput(PRC_IFDOWN, &ifa->ifa_addr);
+}
+
+/*
+ * Handle interface watchdog timer routines. Called
+ * from softclock, we decrement timers (if set) and
+ * call the appropriate interface routine on expiration.
+ */
+if_slowtimo()
+{
+ register struct ifnet *ifp;
+
+ for (ifp = ifnet; ifp; ifp = ifp->if_next) {
+ if (ifp->if_timer == 0 || --ifp->if_timer)
+ continue;
+ if (ifp->if_watchdog)
+ (*ifp->if_watchdog)(ifp->if_unit);
+ }
+ timeout(if_slowtimo, (caddr_t)0, hz / IFNET_SLOWHZ);
+}
+
+/*
+ * Map interface name to
+ * interface structure pointer.
+ */
+struct ifnet *
+ifunit(name)
+ register char *name;
+{
+ register char *cp;
+ register struct ifnet *ifp;
+ int unit;
+
+ for (cp = name; cp < name + IFNAMSIZ && *cp; cp++)
+ if (*cp >= '0' && *cp <= '9')
break;
+ if (*cp == '\0' || cp == name + IFNAMSIZ)
+ return ((struct ifnet *)0);
+ unit = *cp - '0';
+ for (ifp = ifnet; ifp; ifp = ifp->if_next) {
+ if (bcmp(ifp->if_name, name, (unsigned)(cp - name)))
+ continue;
+ if (unit == ifp->if_unit)
+ break;
+ }
return (ifp);
}
-/*ARGSUSED*/
-struct ifnet *
-if_gatewayfor(addr)
- struct in_addr addr;
+/*
+ * Interface ioctls.
+ */
+ifioctl(so, cmd, data)
+ struct socket *so;
+ int cmd;
+ caddr_t data;
{
+ register struct ifnet *ifp;
+ register struct ifreq *ifr;
-COUNT(IF_GATEWAYFOR);
+ switch (cmd) {
+
+ case SIOCGIFCONF:
+ return (ifconf(cmd, data));
+
+#if defined(INET) && NETHER > 0
+ case SIOCSARP:
+ case SIOCDARP:
+ if (!suser())
+ return (u.u_error);
+ /* FALL THROUGH */
+ case SIOCGARP:
+ return (arpioctl(cmd, data));
+#endif
+ }
+ ifr = (struct ifreq *)data;
+ ifp = ifunit(ifr->ifr_name);
+ if (ifp == 0)
+ return (ENXIO);
+ switch (cmd) {
+
+ case SIOCGIFFLAGS:
+ ifr->ifr_flags = ifp->if_flags;
+ break;
+
+ case SIOCGIFMETRIC:
+ ifr->ifr_metric = ifp->if_metric;
+ break;
+
+ case SIOCSIFFLAGS:
+ if (!suser())
+ return (u.u_error);
+ if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) {
+ int s = splimp();
+ if_down(ifp);
+ splx(s);
+ }
+ ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
+ (ifr->ifr_flags &~ IFF_CANTCHANGE);
+ if (ifp->if_ioctl)
+ (void) (*ifp->if_ioctl)(ifp, cmd, data);
+ break;
+
+ case SIOCSIFMETRIC:
+ if (!suser())
+ return (u.u_error);
+ ifp->if_metric = ifr->ifr_metric;
+ break;
+
+ default:
+ if (so->so_proto == 0)
+ return (EOPNOTSUPP);
+ return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
+ cmd, data, ifp));
+ }
return (0);
}
-struct in_addr
-if_makeaddr(net, host)
- int net, host;
+/*
+ * Return interface configuration
+ * of system. List may be used
+ * in later ioctl's (above) to get
+ * other information.
+ */
+/*ARGSUSED*/
+ifconf(cmd, data)
+ int cmd;
+ caddr_t data;
{
- u_long addr;
+ register struct ifconf *ifc = (struct ifconf *)data;
+ register struct ifnet *ifp = ifnet;
+ register struct ifaddr *ifa;
+ register char *cp, *ep;
+ struct ifreq ifr, *ifrp;
+ int space = ifc->ifc_len, error = 0;
- if (net < 128)
- addr = (host << 8) | net;
- else if (net < 65536)
- addr = (host << 16) | net;
- else
- addr = (host << 24) | net;
- addr = htonl(addr);
- return (*(struct in_addr *)&addr);
+ ifrp = ifc->ifc_req;
+ ep = ifr.ifr_name + sizeof (ifr.ifr_name) - 2;
+ for (; space > sizeof (ifr) && ifp; ifp = ifp->if_next) {
+ bcopy(ifp->if_name, ifr.ifr_name, sizeof (ifr.ifr_name) - 2);
+ for (cp = ifr.ifr_name; cp < ep && *cp; cp++)
+ ;
+ *cp++ = '0' + ifp->if_unit; *cp = '\0';
+ if ((ifa = ifp->if_addrlist) == 0) {
+ bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
+ error = copyout((caddr_t)&ifr, (caddr_t)ifrp, sizeof (ifr));
+ if (error)
+ break;
+ space -= sizeof (ifr), ifrp++;
+ } else
+ for ( ; space > sizeof (ifr) && ifa; ifa = ifa->ifa_next) {
+ ifr.ifr_addr = ifa->ifa_addr;
+ error = copyout((caddr_t)&ifr, (caddr_t)ifrp, sizeof (ifr));
+ if (error)
+ break;
+ space -= sizeof (ifr), ifrp++;
+ }
+ }
+ ifc->ifc_len -= space;
+ return (error);
}