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) */ 175 176