From 74b3a519f7c73314c1514d9fbf22c8dd6cebad8d Mon Sep 17 00:00:00 2001
From: Henning Brauer <henning@cvs.openbsd.org>
Date: Sun, 12 Jun 2005 00:41:34 +0000
Subject: add SIOCGIFGMEMB ioctl, returns a list of all interfaces who are
 member of the given group, markus ok

---
 sys/net/if.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 47 insertions(+), 1 deletion(-)

(limited to 'sys/net/if.c')

diff --git a/sys/net/if.c b/sys/net/if.c
index 8cc996aa18f..36ccbee3ecd 100644
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if.c,v 1.132 2005/06/08 07:36:50 henning Exp $	*/
+/*	$OpenBSD: if.c,v 1.133 2005/06/12 00:41:33 henning Exp $	*/
 /*	$NetBSD: if.c,v 1.35 1996/05/07 05:26:04 thorpej Exp $	*/
 
 /*
@@ -136,6 +136,9 @@ int	if_detached_ioctl(struct ifnet *, u_long, caddr_t);
 int	if_detached_init(struct ifnet *);
 void	if_detached_watchdog(struct ifnet *);
 
+int	if_getgroup(caddr_t, struct ifnet *);
+int	if_getgroupmembers(caddr_t);
+
 int	if_clone_list(struct if_clonereq *);
 struct if_clone	*if_clone_lookup(const char *, int *);
 
@@ -1194,6 +1197,8 @@ ifioctl(struct socket *so, u_long cmd, caddr_t data, struct proc *p)
 		    if_clone_destroy(ifr->ifr_name));
 	case SIOCIFGCLONERS:
 		return (if_clone_list((struct if_clonereq *)data));
+	case SIOCGIFGMEMB:
+		return (if_getgroupmembers(data));
 	}
 
 	ifp = ifunit(ifr->ifr_name);
@@ -1715,6 +1720,47 @@ if_getgroup(caddr_t data, struct ifnet *ifp)
 	return (0);
 }
 
+/*
+ * Stores all members of a group in memory pointed to by data
+ */
+int
+if_getgroupmembers(caddr_t data)
+{
+	struct ifgroupreq	*ifgr = (struct ifgroupreq *)data;
+	struct ifg_group	*ifg;
+	struct ifg_member	*ifgm;
+	struct ifg_req		 ifgrq, *ifgp;
+	int			 len, error;
+
+	TAILQ_FOREACH(ifg, &ifg_head, ifg_next)
+		if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
+			break;
+	if (ifg == NULL)
+		return (ENOENT);
+
+	if (ifgr->ifgr_len == 0) {
+		TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
+			ifgr->ifgr_len += sizeof(ifgrq);
+		return (0);
+	}
+
+	len = ifgr->ifgr_len;
+	ifgp = ifgr->ifgr_groups;
+	TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
+		if (len < sizeof(ifgrq))
+			return (EINVAL);
+		strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
+		    sizeof(ifgrq.ifgrq_member));
+		if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp,
+		    sizeof(struct ifg_req))))
+			return (error);
+		len -= sizeof(ifgrq);
+		ifgp++;
+	}
+
+	return (0);
+}
+
 void
 if_group_routechange(struct sockaddr *dst, struct sockaddr *mask)
 {
-- 
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