[PATCH 12/14] [rndis_host] Add RNDIS physical medium checking into generic_rndis_bind()

[Jussi Kivilinna <jussi.kivilinna-E01nCVcF24I@public.gmane.org>]

Add RNDIS physical medium checking into generic_rndis_bind() and also make
rndis_host to be only bind on every medium except wireless.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna-E01nCVcF24I@public.gmane.org>
---

 drivers/net/usb/rndis_host.c |   34 +++++++++++++++++++++++++++++++---
 drivers/net/usb/rndis_host.h |   19 ++++++++++++++++++-
 2 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c
index 800c9d0..825ff51 100644
--- a/drivers/net/usb/rndis_host.c
+++ b/drivers/net/usb/rndis_host.c
@@ -271,7 +271,8 @@ response_error:
 	return -EDOM;
 }
 
-int generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf)
+int
+generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
 {
 	int			retval;
 	struct net_device	*net = dev->net;
@@ -287,7 +288,7 @@ int generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf)
 		struct rndis_set_c	*set_c;
 		struct rndis_halt	*halt;
 	} u;
-	u32			tmp;
+	u32			tmp, *phym;
 	int			reply_len;
 	unsigned char		*bp;
 
@@ -358,6 +359,28 @@ int generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf)
 			dev->driver_info->early_init(dev) != 0)
 		goto halt_fail_and_release;
 
+	/* Check physical medium */
+	reply_len = sizeof *phym;
+	retval = rndis_query(dev, intf, u.buf, OID_GEN_PHYSICAL_MEDIUM,
+			0, (void **) &phym, &reply_len);
+	if(retval != 0)
+		/* OID is optional so don't fail here. */
+		*phym = RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED;	
+	if(flags & FLAG_RNDIS_PHYM_WIRELESS &&
+			*phym != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
+		dev_err(&intf->dev, "driver requires wireless physical "
+					"medium, but device is not.\n");
+		retval = -ENODEV;
+		goto halt_fail_and_release;
+	}
+	if(flags & FLAG_RNDIS_PHYM_NOT_WIRELESS &&
+			*phym == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
+		dev_err(&intf->dev, "driver requires non-wireless physical "
+					"medium, but device is wireless.\n");
+		retval = -ENODEV;
+		goto halt_fail_and_release;
+	}
+
 	/* Get designated host ethernet address */
 	reply_len = ETH_ALEN;
 	retval = rndis_query(dev, intf, u.buf, OID_802_3_PERMANENT_ADDRESS,
@@ -403,6 +426,11 @@ fail:
 }
 EXPORT_SYMBOL_GPL(generic_rndis_bind);
 
+static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
+{
+	return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS);
+}
+
 void rndis_unbind(struct usbnet *dev, struct usb_interface *intf)
 {
 	struct rndis_halt	*halt;
@@ -518,7 +546,7 @@ EXPORT_SYMBOL_GPL(rndis_tx_fixup);
 static const struct driver_info	rndis_info = {
 	.description =	"RNDIS device",
 	.flags =	FLAG_ETHER | FLAG_FRAMING_RN | FLAG_NO_SETINT,
-	.bind =		generic_rndis_bind,
+	.bind =		rndis_bind,
 	.unbind =	rndis_unbind,
 	.status =	rndis_status,
 	.rx_fixup =	rndis_rx_fixup,
diff --git a/drivers/net/usb/rndis_host.h b/drivers/net/usb/rndis_host.h
index 61f1fd8..edc1d4a 100644
--- a/drivers/net/usb/rndis_host.h
+++ b/drivers/net/usb/rndis_host.h
@@ -82,6 +82,17 @@ struct rndis_msg_hdr {
 #define	RNDIS_STATUS_MEDIA_CONNECT	ccpu2(0x4001000b)
 #define	RNDIS_STATUS_MEDIA_DISCONNECT	ccpu2(0x4001000c)
 
+/* codes for OID_GEN_PHYSICAL_MEDIUM */
+#define	RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED	ccpu2(0x00000000)
+#define	RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN	ccpu2(0x00000001)
+#define	RNDIS_PHYSICAL_MEDIUM_CABLE_MODEM	ccpu2(0x00000002)
+#define	RNDIS_PHYSICAL_MEDIUM_PHONE_LINE	ccpu2(0x00000003)
+#define	RNDIS_PHYSICAL_MEDIUM_POWER_LINE	ccpu2(0x00000004)
+#define	RNDIS_PHYSICAL_MEDIUM_DSL		ccpu2(0x00000005)
+#define	RNDIS_PHYSICAL_MEDIUM_FIBRE_CHANNEL	ccpu2(0x00000006)
+#define	RNDIS_PHYSICAL_MEDIUM_1394		ccpu2(0x00000007)
+#define	RNDIS_PHYSICAL_MEDIUM_WIRELESS_WAN	ccpu2(0x00000008)
+#define	RNDIS_PHYSICAL_MEDIUM_MAX		ccpu2(0x00000009)
 
 struct rndis_data_hdr {
 	__le32	msg_type;		/* RNDIS_MSG_PACKET */
@@ -222,6 +233,7 @@ struct rndis_keepalive_c {	/* IN (optionally OUT) */
 #define OID_802_3_PERMANENT_ADDRESS	ccpu2(0x01010101)
 #define OID_GEN_MAXIMUM_FRAME_SIZE	ccpu2(0x00010106)
 #define OID_GEN_CURRENT_PACKET_FILTER	ccpu2(0x0001010e)
+#define OID_GEN_PHYSICAL_MEDIUM		ccpu2(0x00010202)
 
 /* packet filter bits used by OID_GEN_CURRENT_PACKET_FILTER */
 #define RNDIS_PACKET_TYPE_DIRECTED		ccpu2(0x00000001)
@@ -244,10 +256,15 @@ struct rndis_keepalive_c {	/* IN (optionally OUT) */
 	RNDIS_PACKET_TYPE_ALL_MULTICAST | \
 	RNDIS_PACKET_TYPE_PROMISCUOUS)
 
+/* Flags to require specific physical medium type for generic_rndis_bind() */
+#define FLAG_RNDIS_PHYM_NOT_WIRELESS	0x0001
+#define FLAG_RNDIS_PHYM_WIRELESS	0x0002
+
 
 extern void rndis_status(struct usbnet *dev, struct urb *urb);
 extern int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf);
-extern int generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf);
+extern int
+generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags);
 extern void rndis_unbind(struct usbnet *dev, struct usb_interface *intf);
 extern int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb);
 extern struct sk_buff *