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// SPDX-License-Identifier: GPL-2.0+
/*
* Host Side support for RNDIS Networking Links
* Copyright (C) 2005 by David Brownell
*/
#ifndef __LINUX_USB_RNDIS_HOST_H
#define __LINUX_USB_RNDIS_HOST_H
#include <linux/rndis.h>
/*
* CONTROL uses CDC "encapsulated commands" with funky notifications.
* - control-out: SEND_ENCAPSULATED
* - interrupt-in: RESPONSE_AVAILABLE
* - control-in: GET_ENCAPSULATED
*
* We'll try to ignore the RESPONSE_AVAILABLE notifications.
*
* REVISIT some RNDIS implementations seem to have curious issues still
* to be resolved.
*/
struct rndis_msg_hdr {
__le32 msg_type; /* RNDIS_MSG_* */
__le32 msg_len;
/* followed by data that varies between messages */
__le32 request_id;
__le32 status;
/* ... and more */
} __attribute__ ((packed));
/* MS-Windows uses this strange size, but RNDIS spec says 1024 minimum */
#define CONTROL_BUFFER_SIZE 1025
/* RNDIS defines an (absurdly huge) 10 second control timeout,
* but ActiveSync seems to use a more usual 5 second timeout
* (which matches the USB 2.0 spec).
*/
#define RNDIS_CONTROL_TIMEOUT_MS (5 * 1000)
struct rndis_data_hdr {
__le32 msg_type; /* RNDIS_MSG_PACKET */
__le32 msg_len; /* rndis_data_hdr + data_len + pad */
__le32 data_offset; /* 36 -- right after header */
__le32 data_len; /* ... real packet size */
__le32 oob_data_offset; /* zero */
__le32 oob_data_len; /* zero */
__le32 num_oob; /* zero */
__le32 packet_data_offset; /* zero */
__le32 packet_data_len; /* zero */
__le32 vc_handle; /* zero */
__le32 reserved; /* zero */
} __attribute__ ((packed));
struct rndis_init { /* OUT */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_INIT */
__le32 msg_len; /* 24 */
__le32 request_id;
__le32 major_version; /* of rndis (1.0) */
__le32 minor_version;
__le32 max_transfer_size;
} __attribute__ ((packed));
struct rndis_init_c { /* IN */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_INIT_C */
__le32 msg_len;
__le32 request_id;
__le32 status;
__le32 major_version; /* of rndis (1.0) */
__le32 minor_version;
__le32 device_flags;
__le32 medium; /* zero == 802.3 */
__le32 max_packets_per_message;
__le32 max_transfer_size;
__le32 packet_alignment; /* max 7; (1<<n) bytes */
__le32 af_list_offset; /* zero */
__le32 af_list_size; /* zero */
} __attribute__ ((packed));
struct rndis_halt { /* OUT (no reply) */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_HALT */
__le32 msg_len;
__le32 request_id;
} __attribute__ ((packed));
struct rndis_query { /* OUT */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_QUERY */
__le32 msg_len;
__le32 request_id;
__le32 oid;
__le32 len;
__le32 offset;
/*?*/ __le32 handle; /* zero */
} __attribute__ ((packed));
struct rndis_query_c { /* IN */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_QUERY_C */
__le32 msg_len;
__le32 request_id;
__le32 status;
__le32 len;
__le32 offset;
} __attribute__ ((packed));
struct rndis_set { /* OUT */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_SET */
__le32 msg_len;
__le32 request_id;
__le32 oid;
__le32 len;
__le32 offset;
/*?*/ __le32 handle; /* zero */
} __attribute__ ((packed));
struct rndis_set_c { /* IN */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_SET_C */
__le32 msg_len;
__le32 request_id;
__le32 status;
} __attribute__ ((packed));
struct rndis_reset { /* IN */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_RESET */
__le32 msg_len;
__le32 reserved;
} __attribute__ ((packed));
struct rndis_reset_c { /* OUT */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_RESET_C */
__le32 msg_len;
__le32 status;
__le32 addressing_lost;
} __attribute__ ((packed));
struct rndis_indicate { /* IN (unrequested) */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_INDICATE */
__le32 msg_len;
__le32 status;
__le32 length;
__le32 offset;
/**/ __le32 diag_status;
__le32 error_offset;
/**/ __le32 message;
} __attribute__ ((packed));
struct rndis_keepalive { /* OUT (optionally IN) */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_KEEPALIVE */
__le32 msg_len;
__le32 request_id;
} __attribute__ ((packed));
struct rndis_keepalive_c { /* IN (optionally OUT) */
/* header and: */
__le32 msg_type; /* RNDIS_MSG_KEEPALIVE_C */
__le32 msg_len;
__le32 request_id;
__le32 status;
} __attribute__ ((packed));
/* default filter used with RNDIS devices */
#define RNDIS_DEFAULT_FILTER ( \
RNDIS_PACKET_TYPE_DIRECTED | \
RNDIS_PACKET_TYPE_BROADCAST | \
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
/* Flags for driver_info::data */
#define RNDIS_DRIVER_DATA_POLL_STATUS 1 /* poll status before control */
#define RNDIS_DRIVER_DATA_DST_MAC_FIXUP 2 /* device ignores configured MAC address */
extern void rndis_status(struct usbnet *dev, struct urb *urb);
extern int
rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen);
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 *
rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags);
#endif /* __LINUX_USB_RNDIS_HOST_H */
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