contrib/tcpdump/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 #define NETDISSECT_REWORKED
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include <tcpdump-stdinc.h>
  28
  29 #include "interface.h"
  30
  31
  32 #if defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX)
  33 #include <pcap/usb.h>
  34
  35 static const char tstr[] = "[|usb]";
  36
  37 /* returns direction: 1=inbound 2=outbound -1=invalid */
  38 static int
  39 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 static void
  83 usb_header_print(netdissect_options *ndo, const pcap_usb_header *uh)
  84 {
  85         int direction;
  86
  87         switch(uh->transfer_type)
  88         {
  89                 case URB_ISOCHRONOUS:
  90                         ND_PRINT((ndo, "ISOCHRONOUS"));
  91                         break;
  92                 case URB_INTERRUPT:
  93                         ND_PRINT((ndo, "INTERRUPT"));
  94                         break;
  95                 case URB_CONTROL:
  96                         ND_PRINT((ndo, "CONTROL"));
  97                         break;
  98                 case URB_BULK:
  99                         ND_PRINT((ndo, "BULK"));
 100                         break;
 101                 default:
 102                         ND_PRINT((ndo, " ?"));
 103         }
 104
 105         switch(uh->event_type)
 106         {
 107                 case URB_SUBMIT:
 108                         ND_PRINT((ndo, " SUBMIT"));
 109                         break;
 110                 case URB_COMPLETE:
 111                         ND_PRINT((ndo, " COMPLETE"));
 112                         break;
 113                 case URB_ERROR:
 114                         ND_PRINT((ndo, " ERROR"));
 115                         break;
 116                 default:
 117                         ND_PRINT((ndo, " ?"));
 118         }
 119
 120         direction = get_direction(uh->transfer_type, uh->event_type);
 121         if(direction == 1)
 122                 ND_PRINT((ndo, " from"));
 123         else if(direction == 2)
 124                 ND_PRINT((ndo, " to"));
 125         ND_PRINT((ndo, " %d:%d:%d", uh->bus_id, uh->device_address, uh->endpoint_number & 0x7f));
 126 }
 127
 128 /*
 129  * This is the top level routine of the printer for captures with a
 130  * 48-byte header.
 131  *
 132  * 'p' points to the header of the packet, 'h->ts' is the timestamp,
 133  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 134  * is the number of bytes actually captured.
 135  */
 136 u_int
 137 usb_linux_48_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
 138                         register const u_char *p)
 139 {
 140         if (h->caplen < sizeof(pcap_usb_header)) {
 141                 ND_PRINT((ndo, "%s", tstr));
 142                 return(sizeof(pcap_usb_header));
 143         }
 144
 145         usb_header_print(ndo, (const pcap_usb_header *) p);
 146
 147         return(sizeof(pcap_usb_header));
 148 }
 149
 150 #ifdef DLT_USB_LINUX_MMAPPED
 151 /*
 152  * This is the top level routine of the printer for captures with a
 153  * 64-byte header.
 154  *
 155  * 'p' points to the header of the packet, 'h->ts' is the timestamp,
 156  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 157  * is the number of bytes actually captured.
 158  */
 159 u_int
 160 usb_linux_64_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
 161                         register const u_char *p)
 162 {
 163         if (h->caplen < sizeof(pcap_usb_header_mmapped)) {
 164                 ND_PRINT((ndo, "%s", tstr));
 165                 return(sizeof(pcap_usb_header_mmapped));
 166         }
 167
 168         usb_header_print(ndo, (const pcap_usb_header *) p);
 169
 170         return(sizeof(pcap_usb_header_mmapped));
 171 }
 172 #endif /* DLT_USB_LINUX_MMAPPED */
 173
 174 #endif /* defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX) */
 175