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1 /*
2  * Copyright (c) 2006 Paolo Abeni (Italy)
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  * notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  * notice, this list of conditions and the following disclaimer in the
13  * documentation and/or other materials provided with the distribution.
14  * 3. The name of the author may not be used to endorse or promote
15  * products derived from this software without specific prior written
16  * permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  *
30  * Basic USB data struct
31  * By Paolo Abeni <paolo.abeni@email.it>
32  */
33 
34 #ifndef lib_pcap_usb_h
35 #define lib_pcap_usb_h
36 
37 /*
38  * possible transfer mode
39  */
40 #define URB_TRANSFER_IN   0x80
41 #define URB_ISOCHRONOUS   0x0
42 #define URB_INTERRUPT     0x1
43 #define URB_CONTROL       0x2
44 #define URB_BULK          0x3
45 
46 /*
47  * possible event type
48  */
49 #define URB_SUBMIT        'S'
50 #define URB_COMPLETE      'C'
51 #define URB_ERROR         'E'
52 
53 /*
54  * USB setup header as defined in USB specification.
55  * Appears at the front of each Control S-type packet in DLT_USB captures.
56  */
57 typedef struct _usb_setup {
58 	u_int8_t bmRequestType;
59 	u_int8_t bRequest;
60 	u_int16_t wValue;
61 	u_int16_t wIndex;
62 	u_int16_t wLength;
63 } pcap_usb_setup;
64 
65 /*
66  * Information from the URB for Isochronous transfers.
67  */
68 typedef struct _iso_rec {
69 	int32_t	error_count;
70 	int32_t	numdesc;
71 } iso_rec;
72 
73 /*
74  * Header prepended by linux kernel to each event.
75  * Appears at the front of each packet in DLT_USB_LINUX captures.
76  */
77 typedef struct _usb_header {
78 	u_int64_t id;
79 	u_int8_t event_type;
80 	u_int8_t transfer_type;
81 	u_int8_t endpoint_number;
82 	u_int8_t device_address;
83 	u_int16_t bus_id;
84 	char setup_flag;/*if !=0 the urb setup header is not present*/
85 	char data_flag; /*if !=0 no urb data is present*/
86 	int64_t ts_sec;
87 	int32_t ts_usec;
88 	int32_t status;
89 	u_int32_t urb_len;
90 	u_int32_t data_len; /* amount of urb data really present in this event*/
91 	pcap_usb_setup setup;
92 } pcap_usb_header;
93 
94 /*
95  * Header prepended by linux kernel to each event for the 2.6.31
96  * and later kernels; for the 2.6.21 through 2.6.30 kernels, the
97  * "iso_rec" information, and the fields starting with "interval"
98  * are zeroed-out padding fields.
99  *
100  * Appears at the front of each packet in DLT_USB_LINUX_MMAPPED captures.
101  */
102 typedef struct _usb_header_mmapped {
103 	u_int64_t id;
104 	u_int8_t event_type;
105 	u_int8_t transfer_type;
106 	u_int8_t endpoint_number;
107 	u_int8_t device_address;
108 	u_int16_t bus_id;
109 	char setup_flag;/*if !=0 the urb setup header is not present*/
110 	char data_flag; /*if !=0 no urb data is present*/
111 	int64_t ts_sec;
112 	int32_t ts_usec;
113 	int32_t status;
114 	u_int32_t urb_len;
115 	u_int32_t data_len; /* amount of urb data really present in this event*/
116 	union {
117 		pcap_usb_setup setup;
118 		iso_rec iso;
119 	} s;
120 	int32_t	interval;	/* for Interrupt and Isochronous events */
121 	int32_t start_frame;	/* for Isochronous events */
122 	u_int32_t xfer_flags;	/* copy of URB's transfer flags */
123 	u_int32_t ndesc;	/* number of isochronous descriptors */
124 } pcap_usb_header_mmapped;
125 
126 /*
127  * Isochronous descriptors; for isochronous transfers there might be
128  * one or more of these at the beginning of the packet data.  The
129  * number of descriptors is given by the "ndesc" field in the header;
130  * as indicated, in older kernels that don't put the descriptors at
131  * the beginning of the packet, that field is zeroed out, so that field
132  * can be trusted even in captures from older kernels.
133  */
134 typedef struct _usb_isodesc {
135 	int32_t		status;
136 	u_int32_t	offset;
137 	u_int32_t	len;
138 	u_int8_t	pad[4];
139 } usb_isodesc;
140 
141 #endif
142