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
get_direction(int transfer_type,int event_type)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
usb_header_print(netdissect_options * ndo,const pcap_usb_header * uh)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
usb_linux_48_byte_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)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
usb_linux_64_byte_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)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