Reviewed by: zlei Sponsored by: Juniper Networks, Inc. Differential Revision: https://reviews.freebsd.org/D37812
541 lines
13 KiB
C
541 lines
13 KiB
C
/* $FreeBSD$ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1990, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from the Stanford/CMU enet packet filter,
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* (net/enet.c) distributed as part of 4.3BSD, and code contributed
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* to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
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* Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef USB_GLOBAL_INCLUDE_FILE
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#include USB_GLOBAL_INCLUDE_FILE
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#else
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/fcntl.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_types.h>
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#include <net/if_clone.h>
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#include <net/bpf.h>
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#include <sys/sysctl.h>
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#include <net/route.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usb_busdma.h>
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#include <dev/usb/usb_controller.h>
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#include <dev/usb/usb_core.h>
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#include <dev/usb/usb_process.h>
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#include <dev/usb/usb_device.h>
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#include <dev/usb/usb_bus.h>
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#include <dev/usb/usb_pf.h>
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#include <dev/usb/usb_transfer.h>
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#endif /* USB_GLOBAL_INCLUDE_FILE */
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static void usbpf_init(void *);
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static void usbpf_uninit(void *);
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static int usbpf_ioctl(if_t, u_long, caddr_t);
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static int usbpf_clone_match(struct if_clone *, const char *);
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static int usbpf_clone_create(struct if_clone *, char *, size_t,
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struct ifc_data *, if_t *);
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static int usbpf_clone_destroy(struct if_clone *, if_t, uint32_t);
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static struct usb_bus *usbpf_ifname2ubus(const char *);
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static uint32_t usbpf_aggregate_xferflags(struct usb_xfer_flags *);
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static uint32_t usbpf_aggregate_status(struct usb_xfer_flags_int *);
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static int usbpf_xfer_frame_is_read(struct usb_xfer *, uint32_t);
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static uint32_t usbpf_xfer_precompute_size(struct usb_xfer *, int);
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static struct if_clone *usbpf_cloner;
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static const char usbusname[] = "usbus";
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SYSINIT(usbpf_init, SI_SUB_PSEUDO, SI_ORDER_MIDDLE, usbpf_init, NULL);
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SYSUNINIT(usbpf_uninit, SI_SUB_PSEUDO, SI_ORDER_MIDDLE, usbpf_uninit, NULL);
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static void
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usbpf_init(void *arg)
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{
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struct if_clone_addreq req = {
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.match_f = usbpf_clone_match,
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.create_f = usbpf_clone_create,
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.destroy_f = usbpf_clone_destroy,
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};
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usbpf_cloner = ifc_attach_cloner(usbusname, &req);
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}
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static void
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usbpf_uninit(void *arg)
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{
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int devlcnt;
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device_t *devlp;
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devclass_t dc;
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struct usb_bus *ubus;
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int error;
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int i;
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if_clone_detach(usbpf_cloner);
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dc = devclass_find(usbusname);
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if (dc == NULL)
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return;
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error = devclass_get_devices(dc, &devlp, &devlcnt);
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if (error)
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return;
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for (i = 0; i < devlcnt; i++) {
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ubus = device_get_softc(devlp[i]);
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if (ubus != NULL && ubus->ifp != NULL)
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usbpf_clone_destroy(usbpf_cloner, ubus->ifp, 0);
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}
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free(devlp, M_TEMP);
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}
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static int
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usbpf_ioctl(if_t ifp, u_long cmd, caddr_t data)
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{
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/* No configuration allowed. */
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return (EINVAL);
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}
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static struct usb_bus *
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usbpf_ifname2ubus(const char *ifname)
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{
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device_t dev;
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devclass_t dc;
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int unit;
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int error;
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if (strncmp(ifname, usbusname, sizeof(usbusname) - 1) != 0)
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return (NULL);
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error = ifc_name2unit(ifname, &unit);
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if (error || unit < 0)
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return (NULL);
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dc = devclass_find(usbusname);
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if (dc == NULL)
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return (NULL);
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dev = devclass_get_device(dc, unit);
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if (dev == NULL)
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return (NULL);
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return (device_get_softc(dev));
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}
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static int
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usbpf_clone_match(struct if_clone *ifc, const char *name)
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{
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struct usb_bus *ubus;
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ubus = usbpf_ifname2ubus(name);
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if (ubus == NULL)
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return (0);
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if (ubus->ifp != NULL)
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return (0);
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return (1);
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}
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static int
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usbpf_clone_create(struct if_clone *ifc, char *name, size_t len,
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struct ifc_data *ifd, if_t *ifpp)
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{
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int error;
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int unit;
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if_t ifp;
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struct usb_bus *ubus;
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error = ifc_name2unit(name, &unit);
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if (error)
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return (error);
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if (unit < 0)
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return (EINVAL);
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ubus = usbpf_ifname2ubus(name);
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if (ubus == NULL)
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return (1);
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if (ubus->ifp != NULL)
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return (1);
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error = ifc_alloc_unit(ifc, &unit);
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if (error) {
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device_printf(ubus->parent, "usbpf: Could not allocate "
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"instance\n");
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return (error);
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}
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ifp = ubus->ifp = if_alloc(IFT_USB);
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if (ifp == NULL) {
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ifc_free_unit(ifc, unit);
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device_printf(ubus->parent, "usbpf: Could not allocate "
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"instance\n");
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return (ENOSPC);
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}
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if_setsoftc(ifp, ubus);
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if_initname(ifp, usbusname, unit);
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if_setname(ifp, name);
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if_setioctlfn(ifp, usbpf_ioctl);
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if_attach(ifp);
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if_setflagbits(ifp, IFF_UP, 0);
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rt_ifmsg(ifp, IFF_UP);
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/*
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* XXX According to the specification of DLT_USB, it indicates
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* packets beginning with USB setup header. But not sure all
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* packets would be.
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*/
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bpfattach(ifp, DLT_USB, USBPF_HDR_LEN);
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*ifpp = ifp;
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return (0);
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}
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static int
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usbpf_clone_destroy(struct if_clone *ifc, if_t ifp, uint32_t flags)
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{
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struct usb_bus *ubus;
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int unit;
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ubus = if_getsoftc(ifp);
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unit = if_getdunit(ifp);
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/*
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* Lock USB before clearing the "ifp" pointer, to avoid
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* clearing the pointer in the middle of a TAP operation:
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*/
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USB_BUS_LOCK(ubus);
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ubus->ifp = NULL;
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USB_BUS_UNLOCK(ubus);
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bpfdetach(ifp);
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if_detach(ifp);
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if_free(ifp);
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ifc_free_unit(ifc, unit);
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return (0);
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}
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void
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usbpf_attach(struct usb_bus *ubus)
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{
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if (bootverbose)
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device_printf(ubus->parent, "usbpf: Attached\n");
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}
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void
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usbpf_detach(struct usb_bus *ubus)
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{
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if (ubus->ifp != NULL)
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usbpf_clone_destroy(usbpf_cloner, ubus->ifp, 0);
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if (bootverbose)
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device_printf(ubus->parent, "usbpf: Detached\n");
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}
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static uint32_t
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usbpf_aggregate_xferflags(struct usb_xfer_flags *flags)
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{
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uint32_t val = 0;
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if (flags->force_short_xfer == 1)
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val |= USBPF_FLAG_FORCE_SHORT_XFER;
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if (flags->short_xfer_ok == 1)
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val |= USBPF_FLAG_SHORT_XFER_OK;
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if (flags->short_frames_ok == 1)
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val |= USBPF_FLAG_SHORT_FRAMES_OK;
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if (flags->pipe_bof == 1)
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val |= USBPF_FLAG_PIPE_BOF;
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if (flags->proxy_buffer == 1)
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val |= USBPF_FLAG_PROXY_BUFFER;
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if (flags->ext_buffer == 1)
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val |= USBPF_FLAG_EXT_BUFFER;
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if (flags->manual_status == 1)
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val |= USBPF_FLAG_MANUAL_STATUS;
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if (flags->no_pipe_ok == 1)
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val |= USBPF_FLAG_NO_PIPE_OK;
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if (flags->stall_pipe == 1)
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val |= USBPF_FLAG_STALL_PIPE;
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return (val);
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}
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static uint32_t
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usbpf_aggregate_status(struct usb_xfer_flags_int *flags)
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{
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uint32_t val = 0;
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if (flags->open == 1)
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val |= USBPF_STATUS_OPEN;
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if (flags->transferring == 1)
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val |= USBPF_STATUS_TRANSFERRING;
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if (flags->did_dma_delay == 1)
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val |= USBPF_STATUS_DID_DMA_DELAY;
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if (flags->did_close == 1)
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val |= USBPF_STATUS_DID_CLOSE;
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if (flags->draining == 1)
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val |= USBPF_STATUS_DRAINING;
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if (flags->started == 1)
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val |= USBPF_STATUS_STARTED;
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if (flags->bandwidth_reclaimed == 1)
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val |= USBPF_STATUS_BW_RECLAIMED;
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if (flags->control_xfr == 1)
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val |= USBPF_STATUS_CONTROL_XFR;
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if (flags->control_hdr == 1)
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val |= USBPF_STATUS_CONTROL_HDR;
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if (flags->control_act == 1)
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val |= USBPF_STATUS_CONTROL_ACT;
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if (flags->control_stall == 1)
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val |= USBPF_STATUS_CONTROL_STALL;
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if (flags->short_frames_ok == 1)
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val |= USBPF_STATUS_SHORT_FRAMES_OK;
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if (flags->short_xfer_ok == 1)
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val |= USBPF_STATUS_SHORT_XFER_OK;
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#if USB_HAVE_BUSDMA
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if (flags->bdma_enable == 1)
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val |= USBPF_STATUS_BDMA_ENABLE;
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if (flags->bdma_no_post_sync == 1)
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val |= USBPF_STATUS_BDMA_NO_POST_SYNC;
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if (flags->bdma_setup == 1)
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val |= USBPF_STATUS_BDMA_SETUP;
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#endif
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if (flags->isochronous_xfr == 1)
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val |= USBPF_STATUS_ISOCHRONOUS_XFR;
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if (flags->curr_dma_set == 1)
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val |= USBPF_STATUS_CURR_DMA_SET;
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if (flags->can_cancel_immed == 1)
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val |= USBPF_STATUS_CAN_CANCEL_IMMED;
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if (flags->doing_callback == 1)
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val |= USBPF_STATUS_DOING_CALLBACK;
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return (val);
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}
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static int
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usbpf_xfer_frame_is_read(struct usb_xfer *xfer, uint32_t frame)
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{
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int isread;
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if ((frame == 0) && (xfer->flags_int.control_xfr != 0) &&
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(xfer->flags_int.control_hdr != 0)) {
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/* special case */
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if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) {
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/* The device controller writes to memory */
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isread = 1;
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} else {
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/* The host controller reads from memory */
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isread = 0;
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}
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} else {
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isread = USB_GET_DATA_ISREAD(xfer);
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}
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return (isread);
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}
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static uint32_t
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usbpf_xfer_precompute_size(struct usb_xfer *xfer, int type)
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{
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uint32_t totlen;
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uint32_t x;
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uint32_t nframes;
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if (type == USBPF_XFERTAP_SUBMIT)
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nframes = xfer->nframes;
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else
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nframes = xfer->aframes;
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totlen = USBPF_HDR_LEN + (USBPF_FRAME_HDR_LEN * nframes);
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/* precompute all trace lengths */
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for (x = 0; x != nframes; x++) {
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if (usbpf_xfer_frame_is_read(xfer, x)) {
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if (type != USBPF_XFERTAP_SUBMIT) {
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totlen += USBPF_FRAME_ALIGN(
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xfer->frlengths[x]);
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}
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} else {
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if (type == USBPF_XFERTAP_SUBMIT) {
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totlen += USBPF_FRAME_ALIGN(
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xfer->frlengths[x]);
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}
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}
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}
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return (totlen);
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}
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void
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usbpf_xfertap(struct usb_xfer *xfer, int type)
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{
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struct usb_bus *bus;
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struct usbpf_pkthdr *up;
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struct usbpf_framehdr *uf;
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usb_frlength_t offset;
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uint32_t totlen;
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uint32_t frame;
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uint32_t temp;
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uint32_t nframes;
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uint32_t x;
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uint8_t *buf;
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uint8_t *ptr;
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bus = xfer->xroot->bus;
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/* sanity checks */
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if (bus->ifp == NULL || if_getbpf(bus->ifp) == NULL)
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return;
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if (!bpf_peers_present(if_getbpf(bus->ifp)))
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return;
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totlen = usbpf_xfer_precompute_size(xfer, type);
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if (type == USBPF_XFERTAP_SUBMIT)
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nframes = xfer->nframes;
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else
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nframes = xfer->aframes;
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/*
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* XXX TODO XXX
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*
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* When BPF supports it we could pass a fragmented array of
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* buffers avoiding the data copy operation here.
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*/
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buf = ptr = malloc(totlen, M_TEMP, M_NOWAIT);
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if (buf == NULL) {
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device_printf(bus->parent, "usbpf: Out of memory\n");
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return;
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}
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up = (struct usbpf_pkthdr *)ptr;
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ptr += USBPF_HDR_LEN;
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/* fill out header */
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temp = device_get_unit(bus->bdev);
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up->up_totlen = htole32(totlen);
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up->up_busunit = htole32(temp);
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up->up_address = xfer->xroot->udev->device_index;
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if (xfer->flags_int.usb_mode == USB_MODE_DEVICE)
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up->up_mode = USBPF_MODE_DEVICE;
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else
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up->up_mode = USBPF_MODE_HOST;
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up->up_type = type;
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up->up_xfertype = xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE;
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temp = usbpf_aggregate_xferflags(&xfer->flags);
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up->up_flags = htole32(temp);
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temp = usbpf_aggregate_status(&xfer->flags_int);
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up->up_status = htole32(temp);
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temp = xfer->error;
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up->up_error = htole32(temp);
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temp = xfer->interval;
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up->up_interval = htole32(temp);
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up->up_frames = htole32(nframes);
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temp = xfer->max_packet_size;
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up->up_packet_size = htole32(temp);
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temp = xfer->max_packet_count;
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up->up_packet_count = htole32(temp);
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temp = xfer->endpointno;
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up->up_endpoint = htole32(temp);
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up->up_speed = xfer->xroot->udev->speed;
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/* clear reserved area */
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memset(up->up_reserved, 0, sizeof(up->up_reserved));
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/* init offset and frame */
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offset = 0;
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frame = 0;
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/* iterate all the USB frames and copy data, if any */
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for (x = 0; x != nframes; x++) {
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uint32_t length;
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int isread;
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/* get length */
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length = xfer->frlengths[x];
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/* get frame header pointer */
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uf = (struct usbpf_framehdr *)ptr;
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ptr += USBPF_FRAME_HDR_LEN;
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/* fill out packet header */
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uf->length = htole32(length);
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uf->flags = 0;
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/* get information about data read/write */
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isread = usbpf_xfer_frame_is_read(xfer, x);
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/* 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_if(bus->ifp, buf, totlen);
|
|
|
|
free(buf, M_TEMP);
|
|
}
|