| Current Path : /compat/linux/proc/68247/root/compat/linux/proc/68247/root/sys/dev/usb/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //compat/linux/proc/68247/root/compat/linux/proc/68247/root/sys/dev/usb/usb_pf.c |
/*-
* Copyright (c) 1990, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from the Stanford/CMU enet packet filter,
* (net/enet.c) distributed as part of 4.3BSD, and code contributed
* to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
* Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/usb/usb_pf.c 220301 2011-04-03 20:03:45Z hselasky $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/bpf.h>
#include <sys/sysctl.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_device.h>
#include <dev/usb/usb_bus.h>
#include <dev/usb/usb_pf.h>
#include <dev/usb/usb_transfer.h>
static int usb_no_pf;
SYSCTL_INT(_hw_usb, OID_AUTO, no_pf, CTLFLAG_RW,
&usb_no_pf, 0, "Set to disable USB packet filtering");
TUNABLE_INT("hw.usb.no_pf", &usb_no_pf);
void
usbpf_attach(struct usb_bus *ubus)
{
struct ifnet *ifp;
if (usb_no_pf != 0) {
ubus->ifp = NULL;
return;
}
ifp = ubus->ifp = if_alloc(IFT_USB);
if (ifp == NULL) {
device_printf(ubus->parent, "usbpf: Could not allocate "
"instance\n");
return;
}
if_initname(ifp, "usbus", device_get_unit(ubus->bdev));
ifp->if_flags = IFF_CANTCONFIG;
if_attach(ifp);
if_up(ifp);
/*
* XXX According to the specification of DLT_USB, it indicates
* packets beginning with USB setup header. But not sure all
* packets would be.
*/
bpfattach(ifp, DLT_USB, USBPF_HDR_LEN);
if (bootverbose)
device_printf(ubus->parent, "usbpf: Attached\n");
}
void
usbpf_detach(struct usb_bus *ubus)
{
struct ifnet *ifp = ubus->ifp;
if (ifp != NULL) {
bpfdetach(ifp);
if_down(ifp);
if_detach(ifp);
if_free(ifp);
}
ubus->ifp = NULL;
}
static uint32_t
usbpf_aggregate_xferflags(struct usb_xfer_flags *flags)
{
uint32_t val = 0;
if (flags->force_short_xfer == 1)
val |= USBPF_FLAG_FORCE_SHORT_XFER;
if (flags->short_xfer_ok == 1)
val |= USBPF_FLAG_SHORT_XFER_OK;
if (flags->short_frames_ok == 1)
val |= USBPF_FLAG_SHORT_FRAMES_OK;
if (flags->pipe_bof == 1)
val |= USBPF_FLAG_PIPE_BOF;
if (flags->proxy_buffer == 1)
val |= USBPF_FLAG_PROXY_BUFFER;
if (flags->ext_buffer == 1)
val |= USBPF_FLAG_EXT_BUFFER;
if (flags->manual_status == 1)
val |= USBPF_FLAG_MANUAL_STATUS;
if (flags->no_pipe_ok == 1)
val |= USBPF_FLAG_NO_PIPE_OK;
if (flags->stall_pipe == 1)
val |= USBPF_FLAG_STALL_PIPE;
return (val);
}
static uint32_t
usbpf_aggregate_status(struct usb_xfer_flags_int *flags)
{
uint32_t val = 0;
if (flags->open == 1)
val |= USBPF_STATUS_OPEN;
if (flags->transferring == 1)
val |= USBPF_STATUS_TRANSFERRING;
if (flags->did_dma_delay == 1)
val |= USBPF_STATUS_DID_DMA_DELAY;
if (flags->did_close == 1)
val |= USBPF_STATUS_DID_CLOSE;
if (flags->draining == 1)
val |= USBPF_STATUS_DRAINING;
if (flags->started == 1)
val |= USBPF_STATUS_STARTED;
if (flags->bandwidth_reclaimed == 1)
val |= USBPF_STATUS_BW_RECLAIMED;
if (flags->control_xfr == 1)
val |= USBPF_STATUS_CONTROL_XFR;
if (flags->control_hdr == 1)
val |= USBPF_STATUS_CONTROL_HDR;
if (flags->control_act == 1)
val |= USBPF_STATUS_CONTROL_ACT;
if (flags->control_stall == 1)
val |= USBPF_STATUS_CONTROL_STALL;
if (flags->short_frames_ok == 1)
val |= USBPF_STATUS_SHORT_FRAMES_OK;
if (flags->short_xfer_ok == 1)
val |= USBPF_STATUS_SHORT_XFER_OK;
#if USB_HAVE_BUSDMA
if (flags->bdma_enable == 1)
val |= USBPF_STATUS_BDMA_ENABLE;
if (flags->bdma_no_post_sync == 1)
val |= USBPF_STATUS_BDMA_NO_POST_SYNC;
if (flags->bdma_setup == 1)
val |= USBPF_STATUS_BDMA_SETUP;
#endif
if (flags->isochronous_xfr == 1)
val |= USBPF_STATUS_ISOCHRONOUS_XFR;
if (flags->curr_dma_set == 1)
val |= USBPF_STATUS_CURR_DMA_SET;
if (flags->can_cancel_immed == 1)
val |= USBPF_STATUS_CAN_CANCEL_IMMED;
if (flags->doing_callback == 1)
val |= USBPF_STATUS_DOING_CALLBACK;
return (val);
}
static int
usbpf_xfer_frame_is_read(struct usb_xfer *xfer, uint32_t frame)
{
int isread;
if ((frame == 0) && (xfer->flags_int.control_xfr != 0) &&
(xfer->flags_int.control_hdr != 0)) {
/* special case */
if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) {
/* The device controller writes to memory */
isread = 1;
} else {
/* The host controller reads from memory */
isread = 0;
}
} else {
isread = USB_GET_DATA_ISREAD(xfer);
}
return (isread);
}
static uint32_t
usbpf_xfer_precompute_size(struct usb_xfer *xfer, int type)
{
uint32_t totlen;
uint32_t x;
uint32_t nframes;
if (type == USBPF_XFERTAP_SUBMIT)
nframes = xfer->nframes;
else
nframes = xfer->aframes;
totlen = USBPF_HDR_LEN + (USBPF_FRAME_HDR_LEN * nframes);
/* precompute all trace lengths */
for (x = 0; x != nframes; x++) {
if (usbpf_xfer_frame_is_read(xfer, x)) {
if (type != USBPF_XFERTAP_SUBMIT) {
totlen += USBPF_FRAME_ALIGN(
xfer->frlengths[x]);
}
} else {
if (type == USBPF_XFERTAP_SUBMIT) {
totlen += USBPF_FRAME_ALIGN(
xfer->frlengths[x]);
}
}
}
return (totlen);
}
void
usbpf_xfertap(struct usb_xfer *xfer, int type)
{
struct usb_bus *bus;
struct usbpf_pkthdr *up;
struct usbpf_framehdr *uf;
usb_frlength_t offset;
uint32_t totlen;
uint32_t frame;
uint32_t temp;
uint32_t nframes;
uint32_t x;
uint8_t *buf;
uint8_t *ptr;
bus = xfer->xroot->bus;
/* sanity checks */
if (usb_no_pf != 0)
return;
if (bus->ifp == NULL)
return;
if (!bpf_peers_present(bus->ifp->if_bpf))
return;
totlen = usbpf_xfer_precompute_size(xfer, type);
if (type == USBPF_XFERTAP_SUBMIT)
nframes = xfer->nframes;
else
nframes = xfer->aframes;
/*
* XXX TODO XXX
*
* When BPF supports it we could pass a fragmented array of
* buffers avoiding the data copy operation here.
*/
buf = ptr = malloc(totlen, M_TEMP, M_NOWAIT);
if (buf == NULL) {
device_printf(bus->parent, "usbpf: Out of memory\n");
return;
}
up = (struct usbpf_pkthdr *)ptr;
ptr += USBPF_HDR_LEN;
/* fill out header */
temp = device_get_unit(bus->bdev);
up->up_totlen = htole32(totlen);
up->up_busunit = htole32(temp);
up->up_address = xfer->xroot->udev->device_index;
if (xfer->flags_int.usb_mode == USB_MODE_DEVICE)
up->up_mode = USBPF_MODE_DEVICE;
else
up->up_mode = USBPF_MODE_HOST;
up->up_type = type;
up->up_xfertype = xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE;
temp = usbpf_aggregate_xferflags(&xfer->flags);
up->up_flags = htole32(temp);
temp = usbpf_aggregate_status(&xfer->flags_int);
up->up_status = htole32(temp);
temp = xfer->error;
up->up_error = htole32(temp);
temp = xfer->interval;
up->up_interval = htole32(temp);
up->up_frames = htole32(nframes);
temp = xfer->max_packet_size;
up->up_packet_size = htole32(temp);
temp = xfer->max_packet_count;
up->up_packet_count = htole32(temp);
temp = xfer->endpointno;
up->up_endpoint = htole32(temp);
up->up_speed = xfer->xroot->udev->speed;
/* clear reserved area */
memset(up->up_reserved, 0, sizeof(up->up_reserved));
/* init offset and frame */
offset = 0;
frame = 0;
/* iterate all the USB frames and copy data, if any */
for (x = 0; x != nframes; x++) {
uint32_t length;
int isread;
/* get length */
length = xfer->frlengths[x];
/* get frame header pointer */
uf = (struct usbpf_framehdr *)ptr;
ptr += USBPF_FRAME_HDR_LEN;
/* fill out packet header */
uf->length = htole32(length);
uf->flags = 0;
/* get information about data read/write */
isread = usbpf_xfer_frame_is_read(xfer, x);
/* check if we need to copy any data */
if (isread) {
if (type == USBPF_XFERTAP_SUBMIT)
length = 0;
else {
uf->flags |= htole32(
USBPF_FRAMEFLAG_DATA_FOLLOWS);
}
} else {
if (type != USBPF_XFERTAP_SUBMIT)
length = 0;
else {
uf->flags |= htole32(
USBPF_FRAMEFLAG_DATA_FOLLOWS);
}
}
/* check if data is read direction */
if (isread)
uf->flags |= htole32(USBPF_FRAMEFLAG_READ);
/* copy USB data, if any */
if (length != 0) {
/* copy data */
usbd_copy_out(&xfer->frbuffers[frame],
offset, ptr, length);
/* align length */
temp = USBPF_FRAME_ALIGN(length);
/* zero pad */
if (temp != length)
memset(ptr + length, 0, temp - length);
ptr += temp;
}
if (xfer->flags_int.isochronous_xfr) {
offset += usbd_xfer_old_frame_length(xfer, x);
} else {
frame ++;
}
}
bpf_tap(bus->ifp->if_bpf, buf, totlen);
free(buf, M_TEMP);
}