From 424c347dcc972c68eabb182bda67376354129ddb Mon Sep 17 00:00:00 2001
From: Ted Unangst <tedu@cvs.openbsd.org>
Date: Wed, 30 Mar 2005 02:55:38 +0000
Subject: add lladdr command to ifconfig to set MAC address.  diffs from
 freebsd via Kyunghwan KIM (prs 2117 and 2118) and Fredrik Widlund.  ok
 deraadt

---
 sys/net/if.c | 46 +++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)

(limited to 'sys/net')

diff --git a/sys/net/if.c b/sys/net/if.c
index 16308d8b767..1f1420a29e4 100644
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if.c,v 1.104 2005/02/07 15:00:16 mcbride Exp $	*/
+/*	$OpenBSD: if.c,v 1.105 2005/03/30 02:55:36 tedu Exp $	*/
 /*	$NetBSD: if.c,v 1.35 1996/05/07 05:26:04 thorpej Exp $	*/
 
 /*
@@ -1190,6 +1190,8 @@ ifioctl(so, cmd, data, p)
 {
 	struct ifnet *ifp;
 	struct ifreq *ifr;
+	struct ifaddr *ifa;
+	struct sockaddr_dl *sdl;
 	struct ifgroupreq *ifgr;
 	char ifdescrbuf[IFDESCRSIZE];
 	int error = 0;
@@ -1345,6 +1347,48 @@ ifioctl(so, cmd, data, p)
 			return (error);
 		break;
 
+	case SIOCSIFLLADDR:
+	        if ((error = suser(p, 0)))
+	                return (error);
+	        ifa = ifnet_addrs[ifp->if_index];
+	        if (ifa == NULL)
+	                return(EINVAL);
+	        sdl = (struct sockaddr_dl *)ifa->ifa_addr;
+	        if (sdl == NULL)
+	                return(EINVAL);
+	        if (ifr->ifr_addr.sa_len != ETHER_ADDR_LEN)
+	                return(EINVAL);
+	        switch (ifp->if_type) {
+		case IFT_ETHER:
+		case IFT_FDDI:
+		case IFT_XETHER:
+		case IFT_ISO88025:
+		case IFT_L2VLAN:
+	                bcopy((caddr_t)ifr->ifr_addr.sa_data,
+			      (caddr_t)((struct arpcom *)ifp)->ac_enaddr, ETHER_ADDR_LEN);
+			/* fall through */
+		case IFT_ARCNET:
+                        bcopy((caddr_t)ifr->ifr_addr.sa_data,
+			      LLADDR(sdl), ETHER_ADDR_LEN);
+			break;
+		default:
+	                return (ENODEV);
+		}
+		if (ifp->if_flags & IFF_UP) {
+		        int s = splimp();
+			ifp->if_flags &= ~IFF_UP;
+			(*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
+			ifp->if_flags |= IFF_UP;
+			(*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
+			splx(s);
+			TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) {
+			        if (ifa->ifa_addr != NULL &&
+				    ifa->ifa_addr->sa_family == AF_INET)
+				        arp_ifinit((struct arpcom *)ifp, ifa);
+			}
+		}
+		break;
+
 	default:
 		if (so->so_proto == 0)
 			return (EOPNOTSUPP);
-- 
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