From 0b1a3dc967ea6ed7b2756a5cbed95b4e082c7313 Mon Sep 17 00:00:00 2001
From: benno <benno@openbsd.org>
Date: Mon, 6 Aug 2018 11:42:18 +0000
Subject: [PATCH] make ifconfig <if> join display the list of networks
 configured for auto-join with feedback from florian and stsp ok florian@
 phessler@ (on previous versions of the diff) stsp@

---
 sbin/ifconfig/ifconfig.c       | 58 ++++++++++++++++++++++++++++++++--
 sys/net80211/ieee80211_ioctl.c | 23 +++++++++++++-
 sys/net80211/ieee80211_ioctl.h | 11 ++++++-
 3 files changed, 87 insertions(+), 5 deletions(-)

diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c
index 9bfb1751aab..19b2d1a3b84 100644
--- a/sbin/ifconfig/ifconfig.c
+++ b/sbin/ifconfig/ifconfig.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ifconfig.c,v 1.369 2018/07/13 08:41:32 krw Exp $	*/
+/*	$OpenBSD: ifconfig.c,v 1.370 2018/08/06 11:42:18 benno Exp $	*/
 /*	$NetBSD: ifconfig.c,v 1.40 1997/10/01 02:19:43 enami Exp $	*/
 
 /*
@@ -163,6 +163,7 @@ int	newaddr = 0;
 int	af = AF_INET;
 int	explicit_prefix = 0;
 int	Lflag = 1;
+int	show_join = 0;
 
 int	showmediaflag;
 int	showcapsflag;
@@ -633,6 +634,7 @@ void	in6_status(int);
 void	in6_getaddr(const char *, int);
 void	in6_getprefix(const char *, int);
 void	ieee80211_status(void);
+void	join_status(void);
 void	ieee80211_listchans(void);
 void	ieee80211_listnodes(void);
 void	ieee80211_printnode(struct ieee80211_nodereq *);
@@ -1656,7 +1658,7 @@ setifjoin(const char *val, int d)
 	int len;
 
 	if (val == NULL) {
-		/* TODO: display the list of join'd networks */
+		show_join = 1;
 		return;
 	}
 
@@ -2292,14 +2294,64 @@ ieee80211_status(void)
 		putchar(' ');
 		printb_status(ifr.ifr_flags, IEEE80211_F_USERBITS);
 	}
-
 	putchar('\n');
+	if (show_join)
+		join_status();
 	if (shownet80211chans)
 		ieee80211_listchans();
 	else if (shownet80211nodes)
 		ieee80211_listnodes();
 }
 
+void
+join_status(void)
+{
+	struct ieee80211_joinreq_all ja;
+	struct ieee80211_join *jn = NULL;
+	int jsz = 100;
+	int ojsz;
+	int i;
+	int r;
+
+	bzero(&ja, sizeof(ja));
+	jn = recallocarray(NULL, 0, jsz, sizeof(*jn));
+	if (jn == NULL)
+		err(1, "recallocarray");
+	ojsz = jsz;
+	while (1) {
+		ja.ja_node = jn;
+		ja.ja_size = jsz * sizeof(*jn);
+		strlcpy(ja.ja_ifname, name, sizeof(ja.ja_ifname));
+		
+		if ((r = ioctl(s, SIOCG80211JOINALL, &ja)) != 0) {
+			if (errno == E2BIG) {
+				jsz += 100;
+				jn = recallocarray(jn, ojsz, jsz, sizeof(*jn));
+				if (jn == NULL)
+					err(1, "recallocarray");
+				ojsz = jsz;
+				continue;
+			} else if (errno != ENOENT)
+				warn("SIOCG80211JOINALL");
+			return;
+		}
+		break;
+	}
+
+	if (!ja.ja_nodes)
+		return;
+
+	fputs("\tjoin:\t", stdout);
+	for (i = 0; i < ja.ja_nodes; i++) {
+		if (i > 0)
+			printf("\t\t");
+		if (jn[i].i_len > IEEE80211_NWID_LEN)
+			jn[i].i_len = IEEE80211_NWID_LEN;
+		print_string(jn[i].i_nwid, jn[i].i_len);
+		putchar('\n');
+	}
+}
+
 void
 ieee80211_listchans(void)
 {
diff --git a/sys/net80211/ieee80211_ioctl.c b/sys/net80211/ieee80211_ioctl.c
index 40791460678..2ff4c10d267 100644
--- a/sys/net80211/ieee80211_ioctl.c
+++ b/sys/net80211/ieee80211_ioctl.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ieee80211_ioctl.c,v 1.62 2018/08/06 11:28:01 stsp Exp $	*/
+/*	$OpenBSD: ieee80211_ioctl.c,v 1.63 2018/08/06 11:42:18 benno Exp $	*/
 /*	$NetBSD: ieee80211_ioctl.c,v 1.15 2004/05/06 02:58:16 dyoung Exp $	*/
 
 /*-
@@ -391,8 +391,10 @@ ieee80211_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 	struct ieee80211com *ic = (void *)ifp;
 	struct ifreq *ifr = (struct ifreq *)data;
 	int i, error = 0;
+	size_t len;
 	struct ieee80211_nwid nwid;
 	struct ieee80211_join join;
+	struct ieee80211_joinreq_all *ja;
 	struct ieee80211_ess *ess;
 	struct ieee80211_wpapsk *psk;
 	struct ieee80211_keyavail *ka;
@@ -488,6 +490,25 @@ ieee80211_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 			}
 		}
 		break;
+	case SIOCG80211JOINALL:
+		ja = (struct ieee80211_joinreq_all *)data;
+		ja->ja_nodes = len = 0;
+		TAILQ_FOREACH(ess, &ic->ic_ess, ess_next) {
+			if (len + sizeof(ja->ja_node[0]) >= ja->ja_size) {
+				error = E2BIG;
+				break;
+			}
+			memset(&join, 0, sizeof(join));
+			join.i_len = ess->esslen;
+			memcpy(&join.i_nwid, ess->essid, join.i_len);
+			error = copyout(&join, &ja->ja_node[ja->ja_nodes],
+			    sizeof(ja->ja_node[0]));
+			if (error)
+				break;
+			len += sizeof(join);
+			ja->ja_nodes++;
+		}
+		break;
 	case SIOCS80211NWKEY:
 		if ((error = suser(curproc)) != 0)
 			break;
diff --git a/sys/net80211/ieee80211_ioctl.h b/sys/net80211/ieee80211_ioctl.h
index 9ea74127b22..561ac0f038b 100644
--- a/sys/net80211/ieee80211_ioctl.h
+++ b/sys/net80211/ieee80211_ioctl.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ieee80211_ioctl.h,v 1.32 2018/07/11 20:18:09 phessler Exp $	*/
+/*	$OpenBSD: ieee80211_ioctl.h,v 1.33 2018/08/06 11:42:18 benno Exp $	*/
 /*	$NetBSD: ieee80211_ioctl.h,v 1.7 2004/04/30 22:51:04 dyoung Exp $	*/
 
 /*-
@@ -275,6 +275,7 @@ struct ieee80211_keyrun {
 
 #define SIOCS80211SCAN		 _IOW('i', 210, struct ifreq)
 
+#define	SIOCG80211JOINALL	_IOWR('i', 218, struct ieee80211_joinreq_all)
 #define	SIOCS80211JOIN		_IOWR('i', 255, struct ifreq)
 #define	SIOCG80211JOIN		_IOWR('i', 256, struct ifreq)
 
@@ -288,6 +289,14 @@ struct ieee80211_join {
 	struct ieee80211_nwkey	i_nwkey;
 };
 
+struct ieee80211_joinreq_all {
+	char			 ja_ifname[IFNAMSIZ];
+	int			 ja_nodes; /* returned count */
+	size_t			 ja_size;  /* size of node buffer */
+	struct ieee80211_join	*ja_node;  /* allocated node buffer */
+};
+
+
 #define IEEE80211_JOIN_SHOW	0x01
 #define IEEE80211_JOIN_FOUND	0x02
 #define IEEE80211_JOIN_DEL	0x04
-- 
2.20.1