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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
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <pcap.h>
#include <stdio.h>
#include <string.h>
#include "interface.h"
#if defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX)
#include <pcap/usb.h>
/* 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;
}
/*
* This is the top level routine of the printer. 'p' points
* to the ether 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_print(const struct pcap_pkthdr *h, register const u_char *p)
{
const pcap_usb_header *uh;
int direction;
if (h->caplen < sizeof(pcap_usb_header)) {
printf("[|usb]");
return(sizeof(pcap_usb_header));
}
uh = (const pcap_usb_header *) p;
switch(uh->transfer_type)
{
case URB_ISOCHRONOUS:
printf("ISOCHRONOUS");
break;
case URB_INTERRUPT:
printf("INTERRUPT");
break;
case URB_CONTROL:
printf("CONTROL");
break;
case URB_BULK:
printf("BULK");
break;
default:
printf(" ?");
}
switch(uh->event_type)
{
case URB_SUBMIT:
printf(" SUBMIT");
break;
case URB_COMPLETE:
printf(" COMPLETE");
break;
case URB_ERROR:
printf(" ERROR");
break;
default:
printf(" ?");
}
direction = get_direction(uh->transfer_type, uh->event_type);
if(direction == 1)
printf(" from");
else if(direction == 2)
printf(" to");
printf(" %d:%d:%d", uh->bus_id, uh->device_address, uh->endpoint_number & 0x7f);
return(sizeof(pcap_usb_header));
}
#endif
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