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/*
* Copyright 2009 Bert Vermeulen <bert@biot.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by Paolo Abeni.''
* The name of author may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Support for USB packets
*
*/
#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include "interface.h"
#if defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX)
#include <pcap/usb.h>
static const char tstr[] = "[|usb]";
/* returns direction: 1=inbound 2=outbound -1=invalid */
static int
get_direction(int transfer_type, int event_type)
{
int direction;
direction = -1;
switch(transfer_type){
case URB_BULK:
case URB_CONTROL:
case URB_ISOCHRONOUS:
switch(event_type)
{
case URB_SUBMIT:
direction = 2;
break;
case URB_COMPLETE:
case URB_ERROR:
direction = 1;
break;
default:
direction = -1;
}
break;
case URB_INTERRUPT:
switch(event_type)
{
case URB_SUBMIT:
direction = 1;
break;
case URB_COMPLETE:
case URB_ERROR:
direction = 2;
break;
default:
direction = -1;
}
break;
default:
direction = -1;
}
return direction;
}
static void
usb_header_print(netdissect_options *ndo, const pcap_usb_header *uh)
{
int direction;
switch(uh->transfer_type)
{
case URB_ISOCHRONOUS:
ND_PRINT((ndo, "ISOCHRONOUS"));
break;
case URB_INTERRUPT:
ND_PRINT((ndo, "INTERRUPT"));
break;
case URB_CONTROL:
ND_PRINT((ndo, "CONTROL"));
break;
case URB_BULK:
ND_PRINT((ndo, "BULK"));
break;
default:
ND_PRINT((ndo, " ?"));
}
switch(uh->event_type)
{
case URB_SUBMIT:
ND_PRINT((ndo, " SUBMIT"));
break;
case URB_COMPLETE:
ND_PRINT((ndo, " COMPLETE"));
break;
case URB_ERROR:
ND_PRINT((ndo, " ERROR"));
break;
default:
ND_PRINT((ndo, " ?"));
}
direction = get_direction(uh->transfer_type, uh->event_type);
if(direction == 1)
ND_PRINT((ndo, " from"));
else if(direction == 2)
ND_PRINT((ndo, " to"));
ND_PRINT((ndo, " %d:%d:%d", uh->bus_id, uh->device_address, uh->endpoint_number & 0x7f));
}
/*
* This is the top level routine of the printer for captures with a
* 48-byte header.
*
* 'p' points to the header of the packet, 'h->ts' is the timestamp,
* 'h->len' is the length of the packet off the wire, and 'h->caplen'
* is the number of bytes actually captured.
*/
u_int
usb_linux_48_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
register const u_char *p)
{
if (h->caplen < sizeof(pcap_usb_header)) {
ND_PRINT((ndo, "%s", tstr));
return(sizeof(pcap_usb_header));
}
usb_header_print(ndo, (const pcap_usb_header *) p);
return(sizeof(pcap_usb_header));
}
#ifdef DLT_USB_LINUX_MMAPPED
/*
* This is the top level routine of the printer for captures with a
* 64-byte header.
*
* 'p' points to the header of the packet, 'h->ts' is the timestamp,
* 'h->len' is the length of the packet off the wire, and 'h->caplen'
* is the number of bytes actually captured.
*/
u_int
usb_linux_64_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
register const u_char *p)
{
if (h->caplen < sizeof(pcap_usb_header_mmapped)) {
ND_PRINT((ndo, "%s", tstr));
return(sizeof(pcap_usb_header_mmapped));
}
usb_header_print(ndo, (const pcap_usb_header *) p);
return(sizeof(pcap_usb_header_mmapped));
}
#endif /* DLT_USB_LINUX_MMAPPED */
#endif /* defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX) */
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