Add a new "rtlabel" option to ifconfig. It allows to specify a route label

which will be used for new interface routes. For example,
	ifconfig em0 10.1.1.0 255.255.255.0 rtlabel RING_1
will set the new interface address and attach the route label RING_1 to
the corresponding route.

manpage bits from jmc@
ok claudio@ henning@

4 files changed, 39 insertions, 4 deletions

diff --git a/sys/net/if.c b/sys/net/if.c
index 0852b5c425b..322437c670e 100644
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if.c,v 1.161 2007/06/08 09:31:38 henning Exp $	*/
+/*	$OpenBSD: if.c,v 1.162 2007/06/14 18:31:49 reyk Exp $	*/
 /*	$NetBSD: if.c,v 1.35 1996/05/07 05:26:04 thorpej Exp $	*/
 
 /*
@@ -1151,9 +1151,11 @@ ifioctl(struct socket *so, u_long cmd, caddr_t data, struct proc *p)
 	struct sockaddr_dl *sdl;
 	struct ifgroupreq *ifgr;
 	char ifdescrbuf[IFDESCRSIZE];
+	char ifrtlabelbuf[RTLABEL_LEN];
 	int error = 0;
 	size_t bytesdone;
 	short oif_flags;
+	const char *label;
 
 	switch (cmd) {
 
@@ -1291,6 +1293,24 @@ ifioctl(struct socket *so, u_long cmd, caddr_t data, struct proc *p)
 		}
 		break;
 
+	case SIOCGIFRTLABEL:
+		label = rtlabel_id2name(ifp->if_rtlabelid);
+		strlcpy(ifrtlabelbuf, label, RTLABEL_LEN);
+		error = copyoutstr(ifrtlabelbuf, ifr->ifr_data, RTLABEL_LEN,
+		    &bytesdone);
+		break;
+
+	case SIOCSIFRTLABEL:
+		if ((error = suser(p, 0)) != 0)
+			return (error);
+		error = copyinstr(ifr->ifr_data, ifrtlabelbuf,
+		    RTLABEL_LEN, &bytesdone);
+		if (error == 0) {
+			rtlabel_unref(ifp->if_rtlabelid);
+			ifp->if_rtlabelid = rtlabel_name2id(ifrtlabelbuf);
+		}
+		break;
+
 	case SIOCAIFGROUP:
 		if ((error = suser(p, 0)))
 			return (error);
diff --git a/sys/net/if.h b/sys/net/if.h
index 4b3c56542b0..13b976aed93 100644
--- a/sys/net/if.h
+++ b/sys/net/if.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if.h,v 1.89 2007/05/29 18:18:57 uwe Exp $	*/
+/*	$OpenBSD: if.h,v 1.90 2007/06/14 18:31:49 reyk Exp $	*/
 /*	$NetBSD: if.h,v 1.23 1996/05/07 02:40:27 thorpej Exp $	*/
 
 /*
@@ -200,6 +200,7 @@ struct ifnet {				/* and the entries */
 	u_int32_t if_hardmtu;		/* maximum MTU device supports */
 	int	if_capabilities;	/* interface capabilities */
 	char	if_description[IFDESCRSIZE]; /* interface description */
+	u_short	if_rtlabelid;		/* next route label */
 
 	/* procedure handles */
 					/* output routine (enqueue) */
diff --git a/sys/net/route.c b/sys/net/route.c
index b469c4468b6..0005e2c0b74 100644
--- a/sys/net/route.c
+++ b/sys/net/route.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: route.c,v 1.83 2007/05/08 20:57:19 claudio Exp $	*/
+/*	$OpenBSD: route.c,v 1.84 2007/06/14 18:31:49 reyk Exp $	*/
 /*	$NetBSD: route.c,v 1.14 1996/02/13 22:00:46 christos Exp $	*/
 
 /*
@@ -1003,6 +1003,8 @@ rtinit(struct ifaddr *ifa, int cmd, int flags)
 	struct rtentry		*nrt = NULL;
 	int			 error;
 	struct rt_addrinfo	 info;
+	struct sockaddr_rtlabel	 sa_rl;
+	const char		*label;
 
 	dst = flags & RTF_HOST ? ifa->ifa_dstaddr : ifa->ifa_addr;
 	if (cmd == RTM_DELETE) {
@@ -1029,6 +1031,15 @@ rtinit(struct ifaddr *ifa, int cmd, int flags)
 	info.rti_flags = flags | ifa->ifa_flags;
 	info.rti_info[RTAX_DST] = dst;
 	info.rti_info[RTAX_GATEWAY] = ifa->ifa_addr;
+	if (ifa->ifa_ifp->if_rtlabelid) {
+		label = rtlabel_id2name(ifa->ifa_ifp->if_rtlabelid);
+		bzero(&sa_rl, sizeof(sa_rl));
+		sa_rl.sr_len = sizeof(sa_rl);
+		sa_rl.sr_family = AF_UNSPEC;
+		strlcpy(sa_rl.sr_label, label, sizeof(sa_rl.sr_label));
+		info.rti_info[RTAX_LABEL] = (struct sockaddr *)&sa_rl;
+	}
+
 	/*
 	 * XXX here, it seems that we are assuming that ifa_netmask is NULL
 	 * for RTF_HOST.  bsdi4 passes NULL explicitly (via intermediate
diff --git a/sys/sys/sockio.h b/sys/sys/sockio.h
index 80f8f58b09a..64d6d587bc4 100644
--- a/sys/sys/sockio.h
+++ b/sys/sys/sockio.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sockio.h,v 1.38 2006/12/03 13:41:19 reyk Exp $	*/
+/*	$OpenBSD: sockio.h,v 1.39 2007/06/14 18:31:50 reyk Exp $	*/
 /*	$NetBSD: sockio.h,v 1.5 1995/08/23 00:40:47 thorpej Exp $	*/
 
 /*-
@@ -155,6 +155,9 @@
 #define	SIOCSIFDESCR	 _IOW('i', 128, struct ifreq)	/* set ifnet descr */
 #define	SIOCGIFDESCR	_IOWR('i', 129, struct ifreq)	/* get ifnet descr */
 
+#define	SIOCSIFRTLABEL	 _IOW('i', 130, struct ifreq)	/* set ifnet rtlabel */
+#define	SIOCGIFRTLABEL	_IOWR('i', 131, struct ifreq)	/* set ifnet rtlabel */
+
 #define	SIOCSIFTIMESLOT	 _IOW('i', 133, struct ifreq)	/* set ifnet timeslot */
 #define	SIOCGIFTIMESLOT	_IOWR('i', 134, struct ifreq)	/* get ifnet timeslot */