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31 .Nd "dump traffic on USB host controller"
36 .Op Fl d Ar [ugen]B.D.E
48 utility provides a way to dump USB packets on host controllers.
50 The following options are accepted:
51 .Bl -tag -width ".Fl f Ar file"
56 The argument may be prefixed by "ugen".
57 The option may be specified multiple times, but the bus specified must
59 .It Fl d Ar [ugen]bus.device
65 The argument may be prefixed by "ugen".
66 The option may be specified multiple times, but the bus specified must
68 .It Fl d Ar [ugen]bus.device.endpoint
74 The argument may be prefixed by "ugen".
75 The option may be specified multiple times, but the bus specified must
78 Store data part of the USB trace in binary format to the given
80 This option also works with the -r and -f options.
82 Listen on USB bus interface
85 Read the raw packets from
87 This option also works with the -f option.
91 bytes from each packet.
93 Enable debugging messages.
94 When defined multiple times the verbosity level increases.
96 Write the raw packets to
98 This option also works with the -s and -v options.
100 The filter argument consists of either one or two numbers separated by a dot.
101 The first indicates the device unit number which should be traced.
102 The second number which is optional indicates the endpoint which should be traced.
103 To get all traffic for the control endpoint, two filters should be
104 created, one for endpoint 0 and one for endpoint 128.
105 If 128 is added to the endpoint number that means IN direction, else OUT direction is implied.
106 A device unit or endpoint value of -1 means ignore this field.
107 If no filters are specified, all packets are passed through using the default -1,-1 filter.
108 This option can be specified multiple times.
110 This option displays a summary of the command line options.
113 Capture the USB raw packets on usbus2:
115 .Dl "usbdump -i usbus2 -s 256 -v"
117 Dump the USB raw packets of usbus2 into the file without packet
120 .Dl "usbdump -i usbus2 -s 0 -w /tmp/dump_pkts"
122 Dump the USB raw packets of usbus2, but only the control endpoint traffic
123 of device unit number 3:
125 .Dl "usbdump -i usbus2 -s 0 -f 3.0 -f 3.128 -w /tmp/dump_pkts"
127 Read and display the USB raw packets from previous file:
129 .Dl "usbdump -r /tmp/dump_pkts -v"
135 .Dl "<time> <bus>.<addr> <ep> <xfertype> <S/D> (<frames>/<length>) <...>"
137 The meaning of the output format elements is as follows:
138 .Bl -tag -width "<xfertype>"
140 A timestamp preceding all output lines.
141 The timestamp has the format "hh:mm:ss.frac" and is as accurate as
144 The USB host controller's bus unit number.
146 The unique number of the USB device as allocated by the host controller driver.
148 The USB endpoint address that indicates whether the address is
153 The USB transfer type.
161 `S' indicates a USB submit.
162 `D' indicates a USB transfer done.
164 Numbers of frames in this packets.
165 If this is a USB submit, its value is
167 which means how many frames are acceptable or registered to transfer.
168 If this is a USB done,
170 is the actual number of frames.
173 If this is a USB submit, its value is
175 If this is a USB done, its value is
178 Optional field used for printing an error string if the packet is from USB done.
183 .An Weongyo Jeong Aq Mt weongyo@FreeBSD.org