/*
The original version of this code was lrndis/usbd_rndis_core.c from https://github.com/fetisov/lrndis
It has since been overhauled to suit this application
*/
/*
* The MIT License (MIT)
*
* Copyright (c) 2015 by Sergey Fetisov <fsenok@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdalign.h>
#include <string.h>
#include "class/net/net_device.h"
#include "rndis_protocol.h"
#include "netif/ethernet.h"
#define RNDIS_LINK_SPEED 12000000 /* Link baudrate (12Mbit/s for USB-FS) */
#define RNDIS_VENDOR "TinyUSB" /* NIC vendor name */
static const uint8_t *const station_hwaddr = tud_network_mac_address;
static const uint8_t *const permanent_hwaddr = tud_network_mac_address;
static usb_eth_stat_t usb_eth_stat = { 0, 0, 0, 0 };
static uint32_t oid_packet_filter = 0x0000000;
static rndis_state_t rndis_state;
CFG_TUSB_MEM_SECTION CFG_TUSB_MEM_ALIGN static uint8_t ndis_report[8] = { 0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
static const uint32_t OIDSupportedList[] =
{
OID_GEN_SUPPORTED_LIST,
OID_GEN_HARDWARE_STATUS,
OID_GEN_MEDIA_SUPPORTED,
OID_GEN_MEDIA_IN_USE,
OID_GEN_MAXIMUM_FRAME_SIZE,
OID_GEN_LINK_SPEED,
OID_GEN_TRANSMIT_BLOCK_SIZE,
OID_GEN_RECEIVE_BLOCK_SIZE,
OID_GEN_VENDOR_ID,
OID_GEN_VENDOR_DESCRIPTION,
OID_GEN_VENDOR_DRIVER_VERSION,
OID_GEN_CURRENT_PACKET_FILTER,
OID_GEN_MAXIMUM_TOTAL_SIZE,
OID_GEN_PROTOCOL_OPTIONS,
OID_GEN_MAC_OPTIONS,
OID_GEN_MEDIA_CONNECT_STATUS,
OID_GEN_MAXIMUM_SEND_PACKETS,
OID_802_3_PERMANENT_ADDRESS,
OID_802_3_CURRENT_ADDRESS,
OID_802_3_MULTICAST_LIST,
OID_802_3_MAXIMUM_LIST_SIZE,
OID_802_3_MAC_OPTIONS
};
#define OID_LIST_LENGTH TU_ARRAY_SIZE(OIDSupportedList)
#define ENC_BUF_SIZE (OID_LIST_LENGTH * 4 + 32)
static void *encapsulated_buffer;
static void rndis_report(void)
{
netd_report(ndis_report, sizeof(ndis_report));
}
static void rndis_query_cmplt32(int status, uint32_t data)
{
rndis_query_cmplt_t *c;
c = (rndis_query_cmplt_t *)encapsulated_buffer;
c->MessageType = REMOTE_NDIS_QUERY_CMPLT;
c->MessageLength = sizeof(rndis_query_cmplt_t) + 4;
c->InformationBufferLength = 4;
c->InformationBufferOffset = 16;
c->Status = status;
memcpy(c + 1, &data, sizeof(data));
rndis_report();
}
static void rndis_query_cmplt(int status, const void *data, int size)
{
rndis_query_cmplt_t *c;
c = (rndis_query_cmplt_t *)encapsulated_buffer;
c->MessageType = REMOTE_NDIS_QUERY_CMPLT;
c->MessageLength = sizeof(rndis_query_cmplt_t) + size;
c->InformationBufferLength = size;
c->InformationBufferOffset = 16;
c->Status = status;
memcpy(c + 1, data, size);
rndis_report();
}
#define MAC_OPT NDIS_MAC_OPTION_COPY_LOOKAHEAD_DATA | \
NDIS_MAC_OPTION_RECEIVE_SERIALIZED | \
NDIS_MAC_OPTION_TRANSFERS_NOT_PEND | \
NDIS_MAC_OPTION_NO_LOOPBACK
static const char *rndis_vendor = RNDIS_VENDOR;
static void rndis_query(void)
{
switch (((rndis_query_msg_t *)encapsulated_buffer)->Oid)
{
case OID_GEN_SUPPORTED_LIST: rndis_query_cmplt(RNDIS_STATUS_SUCCESS, OIDSupportedList, 4 * OID_LIST_LENGTH); return;
case OID_GEN_VENDOR_DRIVER_VERSION: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, 0x00001000); return;
case OID_802_3_CURRENT_ADDRESS: rndis_query_cmplt(RNDIS_STATUS_SUCCESS, station_hwaddr, 6); return;
case OID_802_3_PERMANENT_ADDRESS: rndis_query_cmplt(RNDIS_STATUS_SUCCESS, permanent_hwaddr, 6); return;
case OID_GEN_MEDIA_SUPPORTED: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, NDIS_MEDIUM_802_3); return;
case OID_GEN_MEDIA_IN_USE: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, NDIS_MEDIUM_802_3); return;
case OID_GEN_PHYSICAL_MEDIUM: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, NDIS_MEDIUM_802_3); return;
case OID_GEN_HARDWARE_STATUS: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, 0); return;
case OID_GEN_LINK_SPEED: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, RNDIS_LINK_SPEED / 100); return;
case OID_GEN_VENDOR_ID: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, 0x00FFFFFF); return;
case OID_GEN_VENDOR_DESCRIPTION: rndis_query_cmplt(RNDIS_STATUS_SUCCESS, rndis_vendor, strlen(rndis_vendor) + 1); return;
case OID_GEN_CURRENT_PACKET_FILTER: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, oid_packet_filter); return;
case OID_GEN_MAXIMUM_FRAME_SIZE: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, CFG_TUD_NET_MTU - SIZEOF_ETH_HDR); return;
case OID_GEN_MAXIMUM_TOTAL_SIZE: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, CFG_TUD_NET_MTU); return;
case OID_GEN_TRANSMIT_BLOCK_SIZE: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, CFG_TUD_NET_MTU); return;
case OID_GEN_RECEIVE_BLOCK_SIZE: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, CFG_TUD_NET_MTU); return;
case OID_GEN_MEDIA_CONNECT_STATUS: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, NDIS_MEDIA_STATE_CONNECTED); return;
case OID_GEN_RNDIS_CONFIG_PARAMETER: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, 0); return;
case OID_802_3_MAXIMUM_LIST_SIZE: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, 1); return;
case OID_802_3_MULTICAST_LIST: rndis_query_cmplt32(RNDIS_STATUS_NOT_SUPPORTED, 0); return;
case OID_802_3_MAC_OPTIONS: rndis_query_cmplt32(RNDIS_STATUS_NOT_SUPPORTED, 0); return;
case OID_GEN_MAC_OPTIONS: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, /*MAC_OPT*/ 0); return;
case OID_802_3_RCV_ERROR_ALIGNMENT: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, 0); return;
case OID_802_3_XMIT_ONE_COLLISION: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, 0); return;
case OID_802_3_XMIT_MORE_COLLISIONS: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, 0); return;
case OID_GEN_XMIT_OK: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, usb_eth_stat.txok); return;
case OID_GEN_RCV_OK: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, usb_eth_stat.rxok); return;
case OID_GEN_RCV_ERROR: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, usb_eth_stat.rxbad); return;
case OID_GEN_XMIT_ERROR: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, usb_eth_stat.txbad); return;
case OID_GEN_RCV_NO_BUFFER: rndis_query_cmplt32(RNDIS_STATUS_SUCCESS, 0); return;
default: rndis_query_cmplt(RNDIS_STATUS_FAILURE, NULL, 0); return;
}
}
#define INFBUF ((uint8_t *)&(m->RequestId) + m->InformationBufferOffset)
static void rndis_handle_config_parm(const char *data, int keyoffset, int valoffset, int keylen, int vallen)
{
(void)data;
(void)keyoffset;
(void)valoffset;
(void)keylen;
(void)vallen;
}
static void rndis_packetFilter(uint32_t newfilter)
{
(void)newfilter;
}
static void rndis_handle_set_msg(void)
{
rndis_set_cmplt_t *c;
rndis_set_msg_t *m;
rndis_Oid_t oid;
c = (rndis_set_cmplt_t *)encapsulated_buffer;
m = (rndis_set_msg_t *)encapsulated_buffer;
oid = m->Oid;
c->MessageType = REMOTE_NDIS_SET_CMPLT;
c->MessageLength = sizeof(rndis_set_cmplt_t);
c->Status = RNDIS_STATUS_SUCCESS;
switch (oid)
{
/* Parameters set up in 'Advanced' tab */
case OID_GEN_RNDIS_CONFIG_PARAMETER:
{
rndis_config_parameter_t *p;
char *ptr = (char *)m;
ptr += sizeof(rndis_generic_msg_t);
ptr += m->InformationBufferOffset;
p = (rndis_config_parameter_t *) ((void*) ptr);
rndis_handle_config_parm(ptr, p->ParameterNameOffset, p->ParameterValueOffset, p->ParameterNameLength, p->ParameterValueLength);
}
break;
/* Mandatory general OIDs */
case OID_GEN_CURRENT_PACKET_FILTER:
memcpy(&oid_packet_filter, INFBUF, 4);
if (oid_packet_filter)
{
rndis_packetFilter(oid_packet_filter);
rndis_state = rndis_data_initialized;
}
else
{
rndis_state = rndis_initialized;
}
break;
case OID_GEN_CURRENT_LOOKAHEAD:
break;
case OID_GEN_PROTOCOL_OPTIONS:
break;
/* Mandatory 802_3 OIDs */
case OID_802_3_MULTICAST_LIST:
break;
/* Power Managment: fails for now */
case OID_PNP_ADD_WAKE_UP_PATTERN:
case OID_PNP_REMOVE_WAKE_UP_PATTERN:
case OID_PNP_ENABLE_WAKE_UP:
default:
c->Status = RNDIS_STATUS_FAILURE;
break;
}
/* c->MessageID is same as before */
rndis_report();
return;
}
void rndis_class_set_handler(uint8_t *data, int size)
{
encapsulated_buffer = data;
(void)size;
switch (((rndis_generic_msg_t *)encapsulated_buffer)->MessageType)
{
case REMOTE_NDIS_INITIALIZE_MSG:
{
rndis_initialize_cmplt_t *m;
m = ((rndis_initialize_cmplt_t *)encapsulated_buffer);
/* m->MessageID is same as before */
m->MessageType = REMOTE_NDIS_INITIALIZE_CMPLT;
m->MessageLength = sizeof(rndis_initialize_cmplt_t);
m->MajorVersion = RNDIS_MAJOR_VERSION;
m->MinorVersion = RNDIS_MINOR_VERSION;
m->Status = RNDIS_STATUS_SUCCESS;
m->DeviceFlags = RNDIS_DF_CONNECTIONLESS;
m->Medium = RNDIS_MEDIUM_802_3;
m->MaxPacketsPerTransfer = 1;
m->MaxTransferSize = CFG_TUD_NET_MTU + sizeof(rndis_data_packet_t);
m->PacketAlignmentFactor = 0;
m->AfListOffset = 0;
m->AfListSize = 0;
rndis_state = rndis_initialized;
rndis_report();
}
break;
case REMOTE_NDIS_QUERY_MSG:
rndis_query();
break;
case REMOTE_NDIS_SET_MSG:
rndis_handle_set_msg();
break;
case REMOTE_NDIS_RESET_MSG:
{
rndis_reset_cmplt_t * m;
m = ((rndis_reset_cmplt_t *)encapsulated_buffer);
rndis_state = rndis_uninitialized;
m->MessageType = REMOTE_NDIS_RESET_CMPLT;
m->MessageLength = sizeof(rndis_reset_cmplt_t);
m->Status = RNDIS_STATUS_SUCCESS;
m->AddressingReset = 1; /* Make it look like we did something */
/* m->AddressingReset = 0; - Windows halts if set to 1 for some reason */
rndis_report();
}
break;
case REMOTE_NDIS_KEEPALIVE_MSG:
{
rndis_keepalive_cmplt_t * m;
m = (rndis_keepalive_cmplt_t *)encapsulated_buffer;
m->MessageType = REMOTE_NDIS_KEEPALIVE_CMPLT;
m->MessageLength = sizeof(rndis_keepalive_cmplt_t);
m->Status = RNDIS_STATUS_SUCCESS;
}
/* We have data to send back */
rndis_report();
break;
default:
break;
}
}