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 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(const pcap_usb_header *uh) 85 { 86 int direction; 87 88 switch(uh->transfer_type) 89 { 90 case URB_ISOCHRONOUS: 91 printf("ISOCHRONOUS"); 92 break; 93 case URB_INTERRUPT: 94 printf("INTERRUPT"); 95 break; 96 case URB_CONTROL: 97 printf("CONTROL"); 98 break; 99 case URB_BULK: 100 printf("BULK"); 101 break; 102 default: 103 printf(" ?"); 104 } 105 106 switch(uh->event_type) 107 { 108 case URB_SUBMIT: 109 printf(" SUBMIT"); 110 break; 111 case URB_COMPLETE: 112 printf(" COMPLETE"); 113 break; 114 case URB_ERROR: 115 printf(" ERROR"); 116 break; 117 default: 118 printf(" ?"); 119 } 120 121 direction = get_direction(uh->transfer_type, uh->event_type); 122 if(direction == 1) 123 printf(" from"); 124 else if(direction == 2) 125 printf(" to"); 126 printf(" %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(const struct pcap_pkthdr *h, register const u_char *p) 139 { 140 if (h->caplen < sizeof(pcap_usb_header)) { 141 printf("[|usb]"); 142 return(sizeof(pcap_usb_header)); 143 } 144 145 usb_header_print((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(const struct pcap_pkthdr *h, register const u_char *p) 161 { 162 if (h->caplen < sizeof(pcap_usb_header_mmapped)) { 163 printf("[|usb]"); 164 return(sizeof(pcap_usb_header_mmapped)); 165 } 166 167 usb_header_print((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) */ 174 175