1 files changed, 134 insertions, 15 deletions

diff --git a/sys/net/if.c b/sys/net/if.c
index 2670eba4e5d..22ad590d968 100644
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -1,7 +1,36 @@
-/*	$OpenBSD: if.c,v 1.24 1999/11/20 18:51:58 espie Exp $	*/
+/*	$OpenBSD: if.c,v 1.25 1999/12/08 06:50:17 itojun Exp $	*/
 /*	$NetBSD: if.c,v 1.35 1996/05/07 05:26:04 thorpej Exp $	*/
 
 /*
+ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
  * Copyright (c) 1980, 1986, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
@@ -53,6 +82,7 @@
 #include <net/if_dl.h>
 #include <net/if_types.h>
 #include <net/radix.h>
+
 #include <net/route.h>
 
 #ifdef INET
@@ -65,6 +95,12 @@
 #endif
 #endif
 
+#ifdef INET6
+#ifndef INET
+#include <netinet/in.h>
+#endif
+#endif
+
 #ifdef IPFILTER
 #include <netinet/ip_fil_compat.h>
 #include <netinet/ip_fil.h>
@@ -85,6 +121,14 @@ int	if_detach_rtdelete __P((struct radix_node *, void *));
 int	ifqmaxlen = IFQ_MAXLEN;
 void	if_slowtimo __P((void *arg));
 
+#ifdef INET6
+/*
+ * XXX: declare here to avoid to include many inet6 related files..
+ * should be more generalized?
+ */
+extern void nd6_setmtu __P((struct ifnet *));
+#endif 
+
 /*
  * Network interface utility routines.
  *
@@ -103,7 +147,8 @@ ifinit()
 }
 
 int if_index = 0;
-struct ifaddr **ifnet_addrs;
+struct ifaddr **ifnet_addrs = NULL;
+struct ifnet **ifindex2ifnet = NULL;
 
 /*
  * Attach an interface to the
@@ -120,16 +165,43 @@ if_attachsetup(ifp)
 	static int if_indexlim = 8;
 
 	ifp->if_index = ++if_index;
-	if (ifnet_addrs == 0 || if_index >= if_indexlim) {
-		unsigned int n = (if_indexlim <<= 1) * sizeof(ifa);
-		struct ifaddr **q = (struct ifaddr **)
-					malloc(n, M_IFADDR, M_WAITOK);
+
+	/*
+	 * We have some arrays that should be indexed by if_index.
+	 * since if_index will grow dynamically, they should grow too.
+	 *	struct ifadd **ifnet_addrs
+	 *	struct ifnet **ifindex2ifnet
+	 */
+	if (ifnet_addrs == 0 || ifindex2ifnet == 0 || if_index >= if_indexlim) {
+		size_t n;
+		caddr_t q;
+		
+		while (if_index >= if_indexlim)
+			if_indexlim <<= 1;
+
+		/* grow ifnet_addrs */
+		n = if_indexlim * sizeof(ifa);
+		q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK);
+		bzero(q, n);
 		if (ifnet_addrs) {
-			bcopy((caddr_t)ifnet_addrs, (caddr_t)q, n/2);
+			bcopy((caddr_t)ifnet_addrs, q, n/2);
 			free((caddr_t)ifnet_addrs, M_IFADDR);
 		}
-		ifnet_addrs = q;
+		ifnet_addrs = (struct ifaddr **)q;
+
+		/* grow ifindex2ifnet */
+		n = if_indexlim * sizeof(struct ifnet *);
+		q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK);
+		bzero(q, n);
+		if (ifindex2ifnet) {
+			bcopy((caddr_t)ifindex2ifnet, q, n/2);
+			free((caddr_t)ifindex2ifnet, M_IFADDR);
+		}
+		ifindex2ifnet = (struct ifnet **)q;
 	}
+
+	ifindex2ifnet[if_index] = ifp;
+
 	/*
 	 * create a Link Level name for this device
 	 */
@@ -151,7 +223,7 @@ if_attachsetup(ifp)
 	sdl->sdl_nlen = namelen;
 	sdl->sdl_index = ifp->if_index;
 	sdl->sdl_type = ifp->if_type;
-	ifnet_addrs[if_index - 1] = ifa;
+	ifnet_addrs[if_index] = ifa;
 	ifa->ifa_ifp = ifp;
 	ifa->ifa_rtrequest = link_rtrequest;
 	TAILQ_INSERT_HEAD(&ifp->if_addrlist, ifa, ifa_list);
@@ -301,6 +373,8 @@ ifa_ifwithaddr(addr)
 		if (equal(addr, ifa->ifa_addr))
 			return (ifa);
 		if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
+		    /* IP6 doesn't have broadcast */
+		    ifa->ifa_broadaddr->sa_len != 0 &&
 		    equal(ifa->ifa_broadaddr, addr))
 			return (ifa);
 	}
@@ -346,7 +420,7 @@ ifa_ifwithnet(addr)
 	if (af == AF_LINK) {
 	    register struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
 	    if (sdl->sdl_index && sdl->sdl_index <= if_index)
-		return (ifnet_addrs[sdl->sdl_index - 1]);
+		return (ifnet_addrs[sdl->sdl_index]);
 	}
 	for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
 		for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
@@ -495,6 +569,9 @@ if_up(ifp)
 		pfctlinput(PRC_IFUP, ifa->ifa_addr);
 #endif
 	rt_ifmsg(ifp);
+#ifdef INET6
+	in6_if_up(ifp);
+#endif
 }
 
 /*
@@ -555,6 +632,35 @@ ifunit(name)
 	return (NULL);
 }
 
+
+/*
+ * Map interface name in a sockaddr_dl to
+ * interface structure pointer.
+ */
+struct ifnet *
+if_withname(sa)
+	struct sockaddr *sa;
+{
+	char ifname[IFNAMSIZ+1];
+	struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
+
+	if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
+	     (sdl->sdl_nlen > IFNAMSIZ) )
+		return NULL;
+
+	/*
+	 * ifunit wants a null-terminated name.  It may not be null-terminated
+	 * in the sockaddr.  We don't want to change the caller's sockaddr,
+	 * and there might not be room to put the trailing null anyway, so we
+	 * make a local copy that we know we can null terminate safely.
+	 */
+
+	bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
+	ifname[sdl->sdl_nlen] = '\0';
+	return ifunit(ifname);
+}
+
+
 /*
  * Interface ioctls.
  */
@@ -567,7 +673,8 @@ ifioctl(so, cmd, data, p)
 {
 	register struct ifnet *ifp;
 	register struct ifreq *ifr;
-	int error;
+	int error = 0;
+	short oif_flags;
 
 	switch (cmd) {
 
@@ -579,6 +686,7 @@ ifioctl(so, cmd, data, p)
 	ifp = ifunit(ifr->ifr_name);
 	if (ifp == 0)
 		return (ENXIO);
+	oif_flags = ifp->if_flags;
 	switch (cmd) {
 
 	case SIOCGIFFLAGS:
@@ -628,13 +736,14 @@ ifioctl(so, cmd, data, p)
 	case SIOCGIFMEDIA:
 		if (ifp->if_ioctl == 0)
 			return (EOPNOTSUPP);
-		return ((*ifp->if_ioctl)(ifp, cmd, data));
+		error = (*ifp->if_ioctl)(ifp, cmd, data);
+		break;
 
 	default:
 		if (so->so_proto == 0)
 			return (EOPNOTSUPP);
 #if !defined(COMPAT_43) && !defined(COMPAT_LINUX) && !defined(COMPAT_SVR4)
-		return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
+		error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
 			(struct mbuf *) cmd, (struct mbuf *) data,
 			(struct mbuf *) ifp));
 #else
@@ -686,12 +795,22 @@ ifioctl(so, cmd, data, p)
 		case OSIOCGIFNETMASK:
 			*(u_int16_t *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
 		}
-		return (error);
 
 	    }
 #endif
+		break;
 	}
-	return (0);
+
+	if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) {
+#ifdef INET6
+		if ((ifp->if_flags & IFF_UP) != 0) {
+			int s = splimp();
+			in6_if_up(ifp);
+			splx(s);
+		}
+#endif
+  	}
+	return (error);
 }
 
 /*