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/* $OpenBSD: print-usbpcap.c,v 1.3 2020/02/22 14:05:08 jasper Exp $ */
/*
* Copyright (c) 2018 Martin Pieuchot <mpi@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <dev/usb/usb.h>
#include <dev/usb/usbpcap.h>
#include <pcap.h>
#include "interface.h"
#ifndef nitems
#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
#endif
const char *usbpcap_xfer_type[] = {"isoc", "intr", "ctrl", "bulk"};
void
usbpcap_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
{
u_int length = h->len;
u_int caplen = h->caplen;
const struct usbpcap_pkt_hdr *uph;
u_int16_t hdrlen;
ts_print(&h->ts);
/* check length */
if (caplen < sizeof(uint16_t) || length < sizeof(*uph))
goto trunc;
uph = (struct usbpcap_pkt_hdr *)p;
hdrlen = letoh16(uph->uph_hlen);
if (hdrlen < sizeof(*uph)) {
printf("[usb: invalid header length %u!]", hdrlen);
goto out;
}
if (caplen < hdrlen)
goto trunc;
printf("bus %u %c addr %u: ep%u",
letoh16(uph->uph_bus),
((uph->uph_info & USBPCAP_INFO_DIRECTION_IN) ? '<' : '>'),
letoh16(uph->uph_devaddr), UE_GET_ADDR(uph->uph_epaddr));
if (uph->uph_xfertype < nitems(usbpcap_xfer_type))
printf(" %s", usbpcap_xfer_type[uph->uph_xfertype]);
else
printf(" ??");
printf(" dlen=%u", letoh32(uph->uph_dlen));
if (xflag)
default_print(p + sizeof(*uph), length - sizeof(*uph));
out:
putchar('\n');
return;
trunc:
printf("[|usb]");
}
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