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) */ 176 177