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