diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index b288ff6..9a13e51 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -58,6 +58,10 @@
 #include <linux/serial.h>
 #include <linux/kfifo.h>
 #include <linux/skbuff.h>
+#include <net/arp.h>
+#include <linux/ip.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
 #include <linux/gsmmux.h>
 
 static int debug;
@@ -77,8 +81,24 @@
  * Semi-arbitrary buffer size limits. 0710 is normally run with 32-64 byte
  * limits so this is plenty
  */
-#define MAX_MRU 512
-#define MAX_MTU 512
+#define MAX_MRU 1500
+#define MAX_MTU 1500
+#define	GSM_NET_TX_TIMEOUT (HZ*10)
+
+/**
+ *	struct gsm_mux_net	-	network interface
+ *	@struct gsm_dlci* dlci
+ *	@struct net_device_stats stats;
+ *
+ *	Created when net interface is initialized.
+ **/
+struct gsm_mux_net {
+	struct kref ref;
+	struct gsm_dlci *dlci;
+	struct net_device_stats stats;
+};
+
+#define STATS(net) (((struct gsm_mux_net *)netdev_priv(net))->stats)
 
 /*
  *	Each block of data we have queued to go out is in the form of
@@ -113,6 +133,7 @@
 #define DLCI_OPENING		1	/* Sending SABM not seen UA */
 #define DLCI_OPEN		2	/* SABM/UA complete */
 #define DLCI_CLOSING		3	/* Sending DISC not seen UA/DM */
+	struct mutex mutex;
 
 	/* Link layer */
 	spinlock_t lock;	/* Protects the internal state */
@@ -123,6 +144,7 @@
 	struct kfifo *fifo;	/* Queue fifo for the DLCI */
 	struct kfifo _fifo;	/* For new fifo API porting only */
 	int adaption;		/* Adaption layer in use */
+	int prev_adaption;
 	u32 modem_rx;		/* Our incoming virtual modem lines */
 	u32 modem_tx;		/* Our outgoing modem lines */
 	int dead;		/* Refuse re-open */
@@ -134,6 +156,8 @@
 	struct sk_buff_head skb_list;	/* Queued frames */
 	/* Data handling callback */
 	void (*data)(struct gsm_dlci *dlci, u8 *data, int len);
+	void (*prev_data)(struct gsm_dlci *dlci, u8 *data, int len);
+	struct net_device *net; /* network interface, if created */
 };
 
 /* DLCI 0, 62/63 are special or reseved see gsmtty_open */
@@ -880,8 +904,10 @@
 	}
 	memcpy(dp, skb_pull(dlci->skb, len), len);
 	__gsm_data_queue(dlci, msg);
-	if (last)
+	if (last) {
+		kfree_skb(dlci->skb);
 		dlci->skb = NULL;
+	}
 	return size;
 }
 
@@ -914,7 +940,7 @@
 			i++;
 			continue;
 		}
-		if (dlci->adaption < 3)
+		if (dlci->adaption < 3 && !dlci->net)
 			len = gsm_dlci_data_output(gsm, dlci);
 		else
 			len = gsm_dlci_data_output_framed(gsm, dlci);
@@ -941,9 +967,12 @@
 
 	spin_lock_irqsave(&dlci->gsm->tx_lock, flags);
 	/* If we have nothing running then we need to fire up */
-	if (dlci->gsm->tx_bytes == 0)
-		gsm_dlci_data_output(dlci->gsm, dlci);
-	else if (dlci->gsm->tx_bytes < TX_THRESH_LO)
+	if (dlci->gsm->tx_bytes == 0) {
+		if (dlci->net)
+			gsm_dlci_data_output_framed(dlci->gsm, dlci);
+		else
+			gsm_dlci_data_output(dlci->gsm, dlci);
+	} else if (dlci->gsm->tx_bytes < TX_THRESH_LO)
 		gsm_dlci_data_sweep(dlci->gsm);
 	spin_unlock_irqrestore(&dlci->gsm->tx_lock, flags);
 }
@@ -1577,6 +1606,7 @@
 	if (dlci == NULL)
 		return NULL;
 	spin_lock_init(&dlci->lock);
+	mutex_init(&dlci->mutex);
 	dlci->fifo = &dlci->_fifo;
 	if (kfifo_alloc(&dlci->_fifo, 4096, GFP_KERNEL) < 0) {
 		kfree(dlci);
@@ -2059,7 +2089,6 @@
 	gsm->t2 = T2;
 	gsm->n2 = N2;
 	gsm->ftype = UIH;
-	gsm->initiator = 0;
 	gsm->adaption = 1;
 	gsm->encoding = 1;
 	gsm->mru = 64;	/* Default to encoding 1 so these should be 64 */
@@ -2478,6 +2507,210 @@
 	}
 }
 
+/*
+ *	Network interface
+ *
+ */
+
+static int gsm_mux_net_open(struct net_device *net)
+{
+	pr_debug("%s called\n", __func__);
+	netif_start_queue(net);
+	return 0;
+}
+
+static int gsm_mux_net_close(struct net_device *net)
+{
+	netif_stop_queue(net);
+	return 0;
+}
+
+static struct net_device_stats *gsm_mux_net_get_stats(struct net_device *net)
+{
+	return &((struct gsm_mux_net *)netdev_priv(net))->stats;
+}
+static void dlci_net_free(struct gsm_dlci *dlci)
+{
+	if (!dlci->net) {
+		WARN_ON(1);
+		return;
+	}
+	dlci->adaption = dlci->prev_adaption;
+	dlci->data = dlci->prev_data;
+	free_netdev(dlci->net);
+	dlci->net = NULL;
+}
+static void net_free(struct kref *ref)
+{
+	struct gsm_mux_net *mux_net;
+	struct gsm_dlci *dlci;
+
+	mux_net = container_of(ref, struct gsm_mux_net, ref);
+	dlci = mux_net->dlci;
+
+	if (dlci->net) {
+		unregister_netdev(dlci->net);
+		dlci_net_free(dlci);
+	}
+}
+
+static int gsm_mux_net_start_xmit(struct sk_buff *skb,
+				      struct net_device *net)
+{
+	struct gsm_mux_net *mux_net = (struct gsm_mux_net *)netdev_priv(net);
+	struct gsm_dlci *dlci = mux_net->dlci;
+	kref_get(&mux_net->ref);
+
+	skb_queue_head(&dlci->skb_list, skb);
+	STATS(net).tx_packets++;
+	STATS(net).tx_bytes += skb->len;
+	gsm_dlci_data_kick(dlci);
+	/* And tell the kernel when the last transmit started. */
+	net->trans_start = jiffies;
+	kref_put(&mux_net->ref, net_free);
+	return NETDEV_TX_OK;
+}
+
+/* called when a packet did not ack after watchdogtimeout */
+static void gsm_mux_net_tx_timeout(struct net_device *net)
+{
+	/* Tell syslog we are hosed. */
+	dev_dbg(&net->dev, "Tx timed out.\n");
+
+	/* Update statistics */
+	STATS(net).tx_errors++;
+}
+
+static void gsm_mux_rx_netchar(struct gsm_dlci *dlci,
+				   unsigned char *in_buf, int size)
+{
+	struct net_device *net = dlci->net;
+	struct sk_buff *skb;
+	struct gsm_mux_net *mux_net = (struct gsm_mux_net *)netdev_priv(net);
+	kref_get(&mux_net->ref);
+
+	/* Allocate an sk_buff */
+	skb = dev_alloc_skb(size + NET_IP_ALIGN);
+	if (!skb) {
+		/* We got no receive buffer. */
+		STATS(net).rx_dropped++;
+		kref_put(&mux_net->ref, net_free);
+		return;
+	}
+	skb_reserve(skb, NET_IP_ALIGN);
+	memcpy(skb_put(skb, size), in_buf, size);
+
+	skb->dev = net;
+	skb->protocol = __constant_htons(ETH_P_IP);
+
+	/* Ship it off to the kernel */
+	netif_rx(skb);
+
+	/* update out statistics */
+	STATS(net).rx_packets++;
+	STATS(net).rx_bytes += size;
+	kref_put(&mux_net->ref, net_free);
+	return;
+}
+
+int gsm_change_mtu(struct net_device *net, int new_mtu)
+{
+	struct gsm_mux_net *mux_net = (struct gsm_mux_net *)netdev_priv(net);
+	if ((new_mtu < 8) || (new_mtu > mux_net->dlci->gsm->mtu))
+		return -EINVAL;
+	net->mtu = new_mtu;
+	return 0;
+}
+
+static void gsm_mux_net_init(struct net_device *net)
+{
+	static const struct net_device_ops gsm_netdev_ops = {
+		.ndo_open		= gsm_mux_net_open,
+		.ndo_stop		= gsm_mux_net_close,
+		.ndo_start_xmit		= gsm_mux_net_start_xmit,
+		.ndo_tx_timeout		= gsm_mux_net_tx_timeout,
+		.ndo_get_stats		= gsm_mux_net_get_stats,
+		.ndo_change_mtu		= gsm_change_mtu,
+	};
+
+	net->netdev_ops = &gsm_netdev_ops;
+
+	/* fill in the other fields */
+	net->watchdog_timeo = GSM_NET_TX_TIMEOUT;
+	net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
+	net->type = ARPHRD_NONE;
+	net->tx_queue_len = 10;
+}
+
+
+/* caller holds the dlci mutex */
+static void gsm_destroy_network(struct gsm_dlci *dlci)
+{
+	struct gsm_mux_net *mux_net;
+
+	pr_debug("destroy network interface");
+	if (!dlci->net)
+		return;
+	mux_net = (struct gsm_mux_net *)netdev_priv(dlci->net);
+	kref_put(&mux_net->ref, net_free);
+}
+
+
+/* caller holds the dlci mutex */
+static int gsm_create_network(struct gsm_dlci *dlci, struct gsm_netconfig *nc)
+{
+	char *netname;
+	int retval = 0;
+	struct net_device *net;
+	struct gsm_mux_net *mux_net;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	/* Already in a non tty mode */
+	if (dlci->adaption > 2)
+		return -EBUSY;
+
+	if (nc->protocol != htons(ETH_P_IP))
+		return -EPROTONOSUPPORT;
+
+	if (nc->adaption != 3 && nc->adaption != 4)
+		return -EPROTONOSUPPORT;
+
+	pr_debug("create network interface");
+
+	netname = "gsm%d";
+	if (nc->if_name[0] != '\0')
+		netname = nc->if_name;
+	net = alloc_netdev(sizeof(struct gsm_mux_net),
+			netname,
+			gsm_mux_net_init);
+	if (!net) {
+		pr_err("alloc_netdev failed");
+		return -ENOMEM;
+	}
+	net->mtu = dlci->gsm->mtu;
+	mux_net = (struct gsm_mux_net *)netdev_priv(net);
+	mux_net->dlci = dlci;
+	kref_init(&mux_net->ref);
+	strncpy(nc->if_name, net->name, IFNAMSIZ); /* return net name */
+
+	/* reconfigure dlci for network */
+	dlci->prev_adaption = dlci->adaption;
+	dlci->prev_data = dlci->data;
+	dlci->adaption = nc->adaption;
+	dlci->data = gsm_mux_rx_netchar;
+	dlci->net = net;
+
+	pr_debug("register netdev");
+	retval = register_netdev(net);
+	if (retval) {
+		pr_err("network register fail %d\n", retval);
+		dlci_net_free(dlci);
+		return retval;
+	}
+	return net->ifindex;	/* return network index */
+}
 
 /* Line discipline for real tty */
 struct tty_ldisc_ops tty_ldisc_packet = {
@@ -2598,6 +2831,9 @@
 	struct gsm_dlci *dlci = tty->driver_data;
 	if (dlci == NULL)
 		return;
+	mutex_lock(&dlci->mutex);
+	gsm_destroy_network(dlci);
+	mutex_unlock(&dlci->mutex);
 	if (tty_port_close_start(&dlci->port, tty, filp) == 0)
 		return;
 	gsm_dlci_begin_close(dlci);
@@ -2679,7 +2915,32 @@
 static int gsmtty_ioctl(struct tty_struct *tty,
 			unsigned int cmd, unsigned long arg)
 {
-	return -ENOIOCTLCMD;
+	struct gsm_dlci *dlci = tty->driver_data;
+	struct gsm_netconfig nc;
+	int index;
+
+	switch (cmd) {
+	case GSMIOC_ENABLE_NET:
+		if (copy_from_user(&nc, (void __user *)arg, sizeof(nc)))
+			return -EFAULT;
+		nc.if_name[IFNAMSIZ-1] = '\0';
+		/* return net interface index or error code */
+		mutex_lock(&dlci->mutex);
+		index = gsm_create_network(dlci, &nc);
+		mutex_unlock(&dlci->mutex);
+		if (copy_to_user((void __user *)arg, &nc, sizeof(nc)))
+			return -EFAULT;
+		return index;
+	case GSMIOC_DISABLE_NET:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		mutex_lock(&dlci->mutex);
+		gsm_destroy_network(dlci);
+		mutex_unlock(&dlci->mutex);
+		return 0;
+	default:
+		return -ENOIOCTLCMD;
+	}
 }
 
 static void gsmtty_set_termios(struct tty_struct *tty, struct ktermios *old)
diff --git a/include/linux/gsmmux.h b/include/linux/gsmmux.h
index 378de41..c25e947 100644
--- a/include/linux/gsmmux.h
+++ b/include/linux/gsmmux.h
@@ -21,5 +21,16 @@
 #define GSMIOC_GETCONF		_IOR('G', 0, struct gsm_config)
 #define GSMIOC_SETCONF		_IOW('G', 1, struct gsm_config)
 
+struct gsm_netconfig {
+	unsigned int adaption;  /* Adaption to use in network mode */
+	unsigned short protocol;/* Protocol to use - only ETH_P_IP supported */
+	unsigned short unused2;
+	char if_name[IFNAMSIZ];	/* interface name format string */
+	__u8 unused[28];        /* For future use */
+};
+
+#define GSMIOC_ENABLE_NET      _IOW('G', 2, struct gsm_netconfig)
+#define GSMIOC_DISABLE_NET     _IO('G', 3)
+
 
 #endif