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 /* \summary: USB printer */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include "config.h"
  26 #endif
  27
  28 #include <netdissect-stdinc.h>
  29
  30 #include "netdissect.h"
  31
  32
  33 #if defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX)
  34 #include <pcap/usb.h>
  35
  36 static const char tstr[] = "[|usb]";
  37
  38 /* returns direction: 1=inbound 2=outbound -1=invalid */
  39 static int
  40 get_direction(int transfer_type, int event_type)
  41 {
  42         int direction;
  43
  44         direction = -1;
  45         switch(transfer_type){
  46         case URB_BULK:
  47         case URB_CONTROL:
  48         case URB_ISOCHRONOUS:
  49                 switch(event_type)
  50                 {
  51                 case URB_SUBMIT:
  52                         direction = 2;
  53                         break;
  54                 case URB_COMPLETE:
  55                 case URB_ERROR:
  56                         direction = 1;
  57                         break;
  58                 default:
  59                         direction = -1;
  60                 }
  61                 break;
  62         case URB_INTERRUPT:
  63                 switch(event_type)
  64                 {
  65                 case URB_SUBMIT:
  66                         direction = 1;
  67                         break;
  68                 case URB_COMPLETE:
  69                 case URB_ERROR:
  70                         direction = 2;
  71                         break;
  72                 default:
  73                         direction = -1;
  74                 }
  75                 break;
  76          default:
  77                 direction = -1;
  78         }
  79
  80         return direction;
  81 }
  82
  83 static void
  84 usb_header_print(netdissect_options *ndo, const pcap_usb_header *uh)
  85 {
  86         int direction;
  87
  88         switch(uh->transfer_type)
  89         {
  90                 case URB_ISOCHRONOUS:
  91                         ND_PRINT((ndo, "ISOCHRONOUS"));
  92                         break;
  93                 case URB_INTERRUPT:
  94                         ND_PRINT((ndo, "INTERRUPT"));
  95                         break;
  96                 case URB_CONTROL:
  97                         ND_PRINT((ndo, "CONTROL"));
  98                         break;
  99                 case URB_BULK:
 100                         ND_PRINT((ndo, "BULK"));
 101                         break;
 102                 default:
 103                         ND_PRINT((ndo, " ?"));
 104         }
 105
 106         switch(uh->event_type)
 107         {
 108                 case URB_SUBMIT:
 109                         ND_PRINT((ndo, " SUBMIT"));
 110                         break;
 111                 case URB_COMPLETE:
 112                         ND_PRINT((ndo, " COMPLETE"));
 113                         break;
 114                 case URB_ERROR:
 115                         ND_PRINT((ndo, " ERROR"));
 116                         break;
 117                 default:
 118                         ND_PRINT((ndo, " ?"));
 119         }
 120
 121         direction = get_direction(uh->transfer_type, uh->event_type);
 122         if(direction == 1)
 123                 ND_PRINT((ndo, " from"));
 124         else if(direction == 2)
 125                 ND_PRINT((ndo, " to"));
 126         ND_PRINT((ndo, " %d:%d:%d", uh->bus_id, uh->device_address, uh->endpoint_number & 0x7f));
 127 }
 128
 129 /*
 130  * This is the top level routine of the printer for captures with a
 131  * 48-byte header.
 132  *
 133  * 'p' points to the header of the packet, 'h->ts' is the timestamp,
 134  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 135  * is the number of bytes actually captured.
 136  */
 137 u_int
 138 usb_linux_48_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
 139                         register const u_char *p)
 140 {
 141         if (h->caplen < sizeof(pcap_usb_header)) {
 142                 ND_PRINT((ndo, "%s", tstr));
 143                 return(sizeof(pcap_usb_header));
 144         }
 145
 146         usb_header_print(ndo, (const pcap_usb_header *) p);
 147
 148         return(sizeof(pcap_usb_header));
 149 }
 150
 151 #ifdef DLT_USB_LINUX_MMAPPED
 152 /*
 153  * This is the top level routine of the printer for captures with a
 154  * 64-byte header.
 155  *
 156  * 'p' points to the header of the packet, 'h->ts' is the timestamp,
 157  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 158  * is the number of bytes actually captured.
 159  */
 160 u_int
 161 usb_linux_64_byte_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
 162                         register const u_char *p)
 163 {
 164         if (h->caplen < sizeof(pcap_usb_header_mmapped)) {
 165                 ND_PRINT((ndo, "%s", tstr));
 166                 return(sizeof(pcap_usb_header_mmapped));
 167         }
 168
 169         usb_header_print(ndo, (const pcap_usb_header *) p);
 170
 171         return(sizeof(pcap_usb_header_mmapped));
 172 }
 173 #endif /* DLT_USB_LINUX_MMAPPED */
 174
 175 #endif /* defined(HAVE_PCAP_USB_H) && defined(DLT_USB_LINUX) */
 176