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 <netdissect-stdinc.h>
  27
  28 #include "netdissect.h"
  29
  30
  31 #if defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX)
  32 #include <pcap/usb.h>
  33
  34 static const char tstr[] = "[|usb]";
  35
  36 /* returns direction: 1=inbound 2=outbound -1=invalid */
  37 static int
  38 get_direction(int transfer_type, int event_type)
  39 {
  40         int direction;
  41
  42         direction = -1;
  43         switch(transfer_type){
  44         case URB_BULK:
  45         case URB_CONTROL:
  46         case URB_ISOCHRONOUS:
  47                 switch(event_type)
  48                 {
  49                 case URB_SUBMIT:
  50                         direction = 2;
  51                         break;
  52                 case URB_COMPLETE:
  53                 case URB_ERROR:
  54                         direction = 1;
  55                         break;
  56                 default:
  57                         direction = -1;
  58                 }
  59                 break;
  60         case URB_INTERRUPT:
  61                 switch(event_type)
  62                 {
  63                 case URB_SUBMIT:
  64                         direction = 1;
  65                         break;
  66                 case URB_COMPLETE:
  67                 case URB_ERROR:
  68                         direction = 2;
  69                         break;
  70                 default:
  71                         direction = -1;
  72                 }
  73                 break;
  74          default:
  75                 direction = -1;
  76         }
  77
  78         return direction;
  79 }
  80
  81 static void
  82 usb_header_print(netdissect_options *ndo, const pcap_usb_header *uh)
  83 {
  84         int direction;
  85
  86         switch(uh->transfer_type)
  87         {
  88                 case URB_ISOCHRONOUS:
  89                         ND_PRINT((ndo, "ISOCHRONOUS"));
  90                         break;
  91                 case URB_INTERRUPT:
  92                         ND_PRINT((ndo, "INTERRUPT"));
  93                         break;
  94                 case URB_CONTROL:
  95                         ND_PRINT((ndo, "CONTROL"));
  96                         break;
  97                 case URB_BULK:
  98                         ND_PRINT((ndo, "BULK"));
  99                         break;
 100                 default:
 101                         ND_PRINT((ndo, " ?"));
 102         }
 103
 104         switch(uh->event_type)
 105         {
 106                 case URB_SUBMIT:
 107                         ND_PRINT((ndo, " SUBMIT"));
 108                         break;
 109                 case URB_COMPLETE:
 110                         ND_PRINT((ndo, " COMPLETE"));
 111                         break;
 112                 case URB_ERROR:
 113                         ND_PRINT((ndo, " ERROR"));
 114                         break;
 115                 default:
 116                         ND_PRINT((ndo, " ?"));
 117         }
 118
 119         direction = get_direction(uh->transfer_type, uh->event_type);
 120         if(direction == 1)
 121                 ND_PRINT((ndo, " from"));
 122         else if(direction == 2)
 123                 ND_PRINT((ndo, " to"));
 124         ND_PRINT((ndo, " %d:%d:%d", uh->bus_id, uh->device_address, uh->endpoint_number & 0x7f));
 125 }
 126
 127 /*
 128  * This is the top level routine of the printer for captures with a
 129  * 48-byte header.
 130  *
 131  * 'p' points to the header of the packet, 'h->ts' is the timestamp,
 132  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 133  * is the number of bytes actually captured.
 134  */
 135 u_int
 136 usb_linux_48_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
 137                         register const u_char *p)
 138 {
 139         if (h->caplen < sizeof(pcap_usb_header)) {
 140                 ND_PRINT((ndo, "%s", tstr));
 141                 return(sizeof(pcap_usb_header));
 142         }
 143
 144         usb_header_print(ndo, (const pcap_usb_header *) p);
 145
 146         return(sizeof(pcap_usb_header));
 147 }
 148
 149 #ifdef DLT_USB_LINUX_MMAPPED
 150 /*
 151  * This is the top level routine of the printer for captures with a
 152  * 64-byte header.
 153  *
 154  * 'p' points to the header of the packet, 'h->ts' is the timestamp,
 155  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 156  * is the number of bytes actually captured.
 157  */
 158 u_int
 159 usb_linux_64_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
 160                         register const u_char *p)
 161 {
 162         if (h->caplen < sizeof(pcap_usb_header_mmapped)) {
 163                 ND_PRINT((ndo, "%s", tstr));
 164                 return(sizeof(pcap_usb_header_mmapped));
 165         }
 166
 167         usb_header_print(ndo, (const pcap_usb_header *) p);
 168
 169         return(sizeof(pcap_usb_header_mmapped));
 170 }
 171 #endif /* DLT_USB_LINUX_MMAPPED */
 172
 173 #endif /* defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX) */
 174