The Tcpdump Group git mirrors - tcpdump/blob - print-usb.c

   1 /*
   2  * Copyright 2009 Bert Vermeulen <bert@biot.com>
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that: (1) source code distributions
   6  * retain the above copyright notice and this paragraph in its entirety, (2)
   7  * distributions including binary code include the above copyright notice and
   8  * this paragraph in its entirety in the documentation or other materials
   9  * provided with the distribution, and (3) all advertising materials mentioning
  10  * features or use of this software display the following acknowledgement:
  11  * ``This product includes software developed by Paolo Abeni.''
  12  * The name of author may not be used to endorse or promote products derived
  13  * from this software without specific prior written permission.
  14  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  15  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  16  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  17  *
  18  * Support for USB packets
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include <tcpdump-stdinc.h>
  27
  28 #include <pcap.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31
  32 #include "interface.h"
  33
  34
  35 #if defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX)
  36 #include <pcap/usb.h>
  37
  38 /* returns direction: 1=inbound 2=outbound -1=invalid */
  39 static int get_direction(int transfer_type, int event_type)
  40 {
  41         int direction;
  42
  43         direction = -1;
  44         switch(transfer_type){
  45         case URB_BULK:
  46         case URB_CONTROL:
  47         case URB_ISOCHRONOUS:
  48                 switch(event_type)
  49                 {
  50                 case URB_SUBMIT:
  51                         direction = 2;
  52                         break;
  53                 case URB_COMPLETE:
  54                 case URB_ERROR:
  55                         direction = 1;
  56                         break;
  57                 default:
  58                         direction = -1;
  59                 }
  60                 break;
  61         case URB_INTERRUPT:
  62                 switch(event_type)
  63                 {
  64                 case URB_SUBMIT:
  65                         direction = 1;
  66                         break;
  67                 case URB_COMPLETE:
  68                 case URB_ERROR:
  69                         direction = 2;
  70                         break;
  71                 default:
  72                         direction = -1;
  73                 }
  74                 break;
  75          default:
  76                 direction = -1;
  77         }
  78
  79         return direction;
  80 }
  81
  82 /*
  83  * This is the top level routine of the printer.  'p' points
  84  * to the ether header of the packet, 'h->ts' is the timestamp,
  85  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
  86  * is the number of bytes actually captured.
  87  */
  88 u_int usb_linux_print(const struct pcap_pkthdr *h, register const u_char *p)
  89 {
  90         const pcap_usb_header *uh;
  91         int direction;
  92
  93         if (h->caplen < sizeof(pcap_usb_header)) {
  94                 printf("[|usb]");
  95                 return(sizeof(pcap_usb_header));
  96         }
  97
  98         uh = (const pcap_usb_header *) p;
  99         switch(uh->transfer_type)
 100         {
 101                 case URB_ISOCHRONOUS:
 102                         printf("ISOCHRONOUS");
 103                         break;
 104                 case URB_INTERRUPT:
 105                         printf("INTERRUPT");
 106                         break;
 107                 case URB_CONTROL:
 108                         printf("CONTROL");
 109                         break;
 110                 case URB_BULK:
 111                         printf("BULK");
 112                         break;
 113                 default:
 114                         printf(" ?");
 115         }
 116
 117         switch(uh->event_type)
 118         {
 119                 case URB_SUBMIT:
 120                         printf(" SUBMIT");
 121                         break;
 122                 case URB_COMPLETE:
 123                         printf(" COMPLETE");
 124                         break;
 125                 case URB_ERROR:
 126                         printf(" ERROR");
 127                         break;
 128                 default:
 129                         printf(" ?");
 130         }
 131
 132         direction = get_direction(uh->transfer_type, uh->event_type);
 133         if(direction == 1)
 134                 printf(" from");
 135         else if(direction == 2)
 136                 printf(" to");
 137         printf(" %d:%d:%d", uh->bus_id, uh->device_address, uh->endpoint_number & 0x7f);
 138
 139         return(sizeof(pcap_usb_header));
 140 }
 141
 142 #endif
 143