mISDN: Fix deactivation, if peer IP is removed from l1oip instance.

 Added GETPEER operation.
 Socket now checks if device is already busy at a differen mode.
Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <kkeil@suse.de>

drivers/isdn/mISDN/l1oip_core.c

@@ -777,6 +777,8 @@ l1oip_socket_thread(void *data)
 static void
 l1oip_socket_close(struct l1oip *hc)
 {
+	struct dchannel *dch = hc->chan[hc->d_idx].dch;
+
 	/* kill thread */
 	if (hc->socket_thread) {
 		if (debug & DEBUG_L1OIP_SOCKET)
@@ -785,6 +787,16 @@ l1oip_socket_close(struct l1oip *hc)
 		send_sig(SIGTERM, hc->socket_thread, 0);
 		wait_for_completion(&hc->socket_complete);
 	}
+
+	/* if active, we send up a PH_DEACTIVATE and deactivate */
+	if (test_bit(FLG_ACTIVE, &dch->Flags)) {
+		if (debug & (DEBUG_L1OIP_MSG|DEBUG_L1OIP_SOCKET))
+			printk(KERN_DEBUG "%s: interface become deactivated "
+				"due to timeout\n", __func__);
+		test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
+		_queue_data(&dch->dev.D, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0,
+			NULL, GFP_ATOMIC);
+	}
 }
 
 static int
@@ -944,7 +956,8 @@ channel_dctrl(struct dchannel *dch, struct mISDN_ctrl_req *cq)
 
 	switch (cq->op) {
 	case MISDN_CTRL_GETOP:
-		cq->op = MISDN_CTRL_SETPEER | MISDN_CTRL_UNSETPEER;
+		cq->op = MISDN_CTRL_SETPEER | MISDN_CTRL_UNSETPEER
+			| MISDN_CTRL_GETPEER;
 		break;
 	case MISDN_CTRL_SETPEER:
 		hc->remoteip = (u32)cq->p1;
@@ -964,6 +977,13 @@ channel_dctrl(struct dchannel *dch, struct mISDN_ctrl_req *cq)
 		hc->remoteip = 0;
 		l1oip_socket_open(hc);
 		break;
+	case MISDN_CTRL_GETPEER:
+		if (debug & DEBUG_L1OIP_SOCKET)
+			printk(KERN_DEBUG "%s: getting ip address.\n",
+				__func__);
+		(u32)cq->p1 = hc->remoteip;
+		cq->p2 = hc->remoteport | (hc->localport << 16);
+		break;
 	default:
 		printk(KERN_WARNING "%s: unknown Op %x\n",
 		    __func__, cq->op);

drivers/isdn/mISDN/socket.c

@@ -460,6 +460,8 @@ data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 {
 	struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
 	struct sock *sk = sock->sk;
+	struct hlist_node *node;
+	struct sock *csk;
 	int err = 0;
 
 	if (*debug & DEBUG_SOCKET)
@@ -480,6 +482,24 @@ data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 		err = -ENODEV;
 		goto done;
 	}
+
+	read_lock_bh(&data_sockets.lock);
+	sk_for_each(csk, node, &data_sockets.head) {
+		if (sk == csk)
+			continue;
+		if (_pms(csk)->dev != _pms(sk)->dev)
+			continue;
+		if (csk->sk_protocol >= ISDN_P_B_START)
+			continue;
+		if (IS_ISDN_P_TE(csk->sk_protocol)
+				== IS_ISDN_P_TE(sk->sk_protocol))
+			continue;
+		read_unlock_bh(&data_sockets.lock);
+		err = -EBUSY;
+		goto done;
+	}
+	read_unlock_bh(&data_sockets.lock);
+
 	_pms(sk)->ch.send = mISDN_send;
 	_pms(sk)->ch.ctrl = mISDN_ctrl;
 

drivers/isdn/mISDN/stack.c

@@ -440,15 +440,6 @@ connect_layer1(struct mISDNdevice *dev, struct mISDNchannel *ch,
 	case ISDN_P_NT_E1:
 	case ISDN_P_TE_S0:
 	case ISDN_P_TE_E1:
-#ifdef PROTOCOL_CHECK
-		/* this should be enhanced */
-		if (!list_empty(&dev->D.st->layer2)
-			&& dev->D.protocol != protocol)
-			return -EBUSY;
-		if (!hlist_empty(&dev->D.st->l1sock.head)
-			&& dev->D.protocol != protocol)
-			return -EBUSY;
-#endif
 		ch->recv = mISDN_queue_message;
 		ch->peer = &dev->D.st->own;
 		ch->st = dev->D.st;
@@ -546,15 +537,6 @@ create_l2entity(struct mISDNdevice *dev, struct mISDNchannel *ch,
 		if (dev->Dprotocols & (1 << ISDN_P_NT_E1))
 			rq.protocol = ISDN_P_NT_E1;
 	case ISDN_P_LAPD_TE:
-#ifdef PROTOCOL_CHECK
-		/* this should be enhanced */
-		if (!list_empty(&dev->D.st->layer2)
-			&& dev->D.protocol != protocol)
-			return -EBUSY;
-		if (!hlist_empty(&dev->D.st->l1sock.head)
-			&& dev->D.protocol != protocol)
-			return -EBUSY;
-#endif
 		ch->recv = mISDN_queue_message;
 		ch->peer = &dev->D.st->own;
 		ch->st = dev->D.st;

include/linux/mISDNif.h

@@ -204,9 +204,9 @@
 #define ISDN_P_NT_UP0		0x06
 
 #define IS_ISDN_P_TE(p) ((p == ISDN_P_TE_S0) || (p == ISDN_P_TE_E1) || \
-				(p == ISDN_P_TE_UP0))
+				(p == ISDN_P_TE_UP0) || (p == ISDN_P_LAPD_TE))
 #define IS_ISDN_P_NT(p) ((p == ISDN_P_NT_S0) || (p == ISDN_P_NT_E1) || \
-				(p == ISDN_P_NT_UP0))
+				(p == ISDN_P_NT_UP0) || (p == ISDN_P_LAPD_NT))
 #define IS_ISDN_P_S0(p) ((p == ISDN_P_TE_S0) || (p == ISDN_P_NT_S0))
 #define IS_ISDN_P_E1(p) ((p == ISDN_P_TE_E1) || (p == ISDN_P_NT_E1))
 #define IS_ISDN_P_UP0(p) ((p == ISDN_P_TE_UP0) || (p == ISDN_P_NT_UP0))
@@ -333,6 +333,7 @@ clear_channelmap(u_int nr, u_char *map)
 #define MISDN_CTRL_UNSETPEER		0x0080
 #define MISDN_CTRL_RX_OFF		0x0100
 #define MISDN_CTRL_FILL_EMPTY		0x0200
+#define MISDN_CTRL_GETPEER		0x0400
 #define MISDN_CTRL_HW_FEATURES_OP	0x2000
 #define MISDN_CTRL_HW_FEATURES		0x2001
 #define MISDN_CTRL_HFC_OP		0x4000