include/linux/usb/rndis_host.h

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Host Side support for RNDIS Networking Links
   4  * Copyright (C) 2005 by David Brownell
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifndef __LINUX_USB_RNDIS_HOST_H
  22 #define __LINUX_USB_RNDIS_HOST_H
  23
  24 #include <linux/rndis.h>
  25
  26 /*
  27  * CONTROL uses CDC "encapsulated commands" with funky notifications.
  28  *  - control-out:  SEND_ENCAPSULATED
  29  *  - interrupt-in:  RESPONSE_AVAILABLE
  30  *  - control-in:  GET_ENCAPSULATED
  31  *
  32  * We'll try to ignore the RESPONSE_AVAILABLE notifications.
  33  *
  34  * REVISIT some RNDIS implementations seem to have curious issues still
  35  * to be resolved.
  36  */
  37 struct rndis_msg_hdr {
  38         __le32  msg_type;                       /* RNDIS_MSG_* */
  39         __le32  msg_len;
  40         /* followed by data that varies between messages */
  41         __le32  request_id;
  42         __le32  status;
  43         /* ... and more */
  44 } __attribute__ ((packed));
  45
  46 /* MS-Windows uses this strange size, but RNDIS spec says 1024 minimum */
  47 #define CONTROL_BUFFER_SIZE             1025
  48
  49 /* RNDIS defines an (absurdly huge) 10 second control timeout,
  50  * but ActiveSync seems to use a more usual 5 second timeout
  51  * (which matches the USB 2.0 spec).
  52  */
  53 #define RNDIS_CONTROL_TIMEOUT_MS        (5 * 1000)
  54
  55 struct rndis_data_hdr {
  56         __le32  msg_type;               /* RNDIS_MSG_PACKET */
  57         __le32  msg_len;                /* rndis_data_hdr + data_len + pad */
  58         __le32  data_offset;            /* 36 -- right after header */
  59         __le32  data_len;               /* ... real packet size */
  60
  61         __le32  oob_data_offset;        /* zero */
  62         __le32  oob_data_len;           /* zero */
  63         __le32  num_oob;                /* zero */
  64         __le32  packet_data_offset;     /* zero */
  65
  66         __le32  packet_data_len;        /* zero */
  67         __le32  vc_handle;              /* zero */
  68         __le32  reserved;               /* zero */
  69 } __attribute__ ((packed));
  70
  71 struct rndis_init {             /* OUT */
  72         /* header and: */
  73         __le32  msg_type;                       /* RNDIS_MSG_INIT */
  74         __le32  msg_len;                        /* 24 */
  75         __le32  request_id;
  76         __le32  major_version;                  /* of rndis (1.0) */
  77         __le32  minor_version;
  78         __le32  max_transfer_size;
  79 } __attribute__ ((packed));
  80
  81 struct rndis_init_c {           /* IN */
  82         /* header and: */
  83         __le32  msg_type;                       /* RNDIS_MSG_INIT_C */
  84         __le32  msg_len;
  85         __le32  request_id;
  86         __le32  status;
  87         __le32  major_version;                  /* of rndis (1.0) */
  88         __le32  minor_version;
  89         __le32  device_flags;
  90         __le32  medium;                         /* zero == 802.3 */
  91         __le32  max_packets_per_message;
  92         __le32  max_transfer_size;
  93         __le32  packet_alignment;               /* max 7; (1<<n) bytes */
  94         __le32  af_list_offset;                 /* zero */
  95         __le32  af_list_size;                   /* zero */
  96 } __attribute__ ((packed));
  97
  98 struct rndis_halt {             /* OUT (no reply) */
  99         /* header and: */
 100         __le32  msg_type;                       /* RNDIS_MSG_HALT */
 101         __le32  msg_len;
 102         __le32  request_id;
 103 } __attribute__ ((packed));
 104
 105 struct rndis_query {            /* OUT */
 106         /* header and: */
 107         __le32  msg_type;                       /* RNDIS_MSG_QUERY */
 108         __le32  msg_len;
 109         __le32  request_id;
 110         __le32  oid;
 111         __le32  len;
 112         __le32  offset;
 113 /*?*/   __le32  handle;                         /* zero */
 114 } __attribute__ ((packed));
 115
 116 struct rndis_query_c {          /* IN */
 117         /* header and: */
 118         __le32  msg_type;                       /* RNDIS_MSG_QUERY_C */
 119         __le32  msg_len;
 120         __le32  request_id;
 121         __le32  status;
 122         __le32  len;
 123         __le32  offset;
 124 } __attribute__ ((packed));
 125
 126 struct rndis_set {              /* OUT */
 127         /* header and: */
 128         __le32  msg_type;                       /* RNDIS_MSG_SET */
 129         __le32  msg_len;
 130         __le32  request_id;
 131         __le32  oid;
 132         __le32  len;
 133         __le32  offset;
 134 /*?*/   __le32  handle;                         /* zero */
 135 } __attribute__ ((packed));
 136
 137 struct rndis_set_c {            /* IN */
 138         /* header and: */
 139         __le32  msg_type;                       /* RNDIS_MSG_SET_C */
 140         __le32  msg_len;
 141         __le32  request_id;
 142         __le32  status;
 143 } __attribute__ ((packed));
 144
 145 struct rndis_reset {            /* IN */
 146         /* header and: */
 147         __le32  msg_type;                       /* RNDIS_MSG_RESET */
 148         __le32  msg_len;
 149         __le32  reserved;
 150 } __attribute__ ((packed));
 151
 152 struct rndis_reset_c {          /* OUT */
 153         /* header and: */
 154         __le32  msg_type;                       /* RNDIS_MSG_RESET_C */
 155         __le32  msg_len;
 156         __le32  status;
 157         __le32  addressing_lost;
 158 } __attribute__ ((packed));
 159
 160 struct rndis_indicate {         /* IN (unrequested) */
 161         /* header and: */
 162         __le32  msg_type;                       /* RNDIS_MSG_INDICATE */
 163         __le32  msg_len;
 164         __le32  status;
 165         __le32  length;
 166         __le32  offset;
 167 /**/    __le32  diag_status;
 168         __le32  error_offset;
 169 /**/    __le32  message;
 170 } __attribute__ ((packed));
 171
 172 struct rndis_keepalive {        /* OUT (optionally IN) */
 173         /* header and: */
 174         __le32  msg_type;                       /* RNDIS_MSG_KEEPALIVE */
 175         __le32  msg_len;
 176         __le32  request_id;
 177 } __attribute__ ((packed));
 178
 179 struct rndis_keepalive_c {      /* IN (optionally OUT) */
 180         /* header and: */
 181         __le32  msg_type;                       /* RNDIS_MSG_KEEPALIVE_C */
 182         __le32  msg_len;
 183         __le32  request_id;
 184         __le32  status;
 185 } __attribute__ ((packed));
 186
 187 /* default filter used with RNDIS devices */
 188 #define RNDIS_DEFAULT_FILTER ( \
 189         RNDIS_PACKET_TYPE_DIRECTED | \
 190         RNDIS_PACKET_TYPE_BROADCAST | \
 191         RNDIS_PACKET_TYPE_ALL_MULTICAST | \
 192         RNDIS_PACKET_TYPE_PROMISCUOUS)
 193
 194 /* Flags to require specific physical medium type for generic_rndis_bind() */
 195 #define FLAG_RNDIS_PHYM_NOT_WIRELESS    0x0001
 196 #define FLAG_RNDIS_PHYM_WIRELESS        0x0002
 197
 198 /* Flags for driver_info::data */
 199 #define RNDIS_DRIVER_DATA_POLL_STATUS   1       /* poll status before control */
 200
 201 extern void rndis_status(struct usbnet *dev, struct urb *urb);
 202 extern int
 203 rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen);
 204 extern int
 205 generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags);
 206 extern void rndis_unbind(struct usbnet *dev, struct usb_interface *intf);
 207 extern int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb);
 208 extern struct sk_buff *
 209 rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags);
 210
 211 #endif  /* __LINUX_USB_RNDIS_HOST_H */