2 * Copyright (c) 2010 Weongyo Jeong <weongyo@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 * redistribution must be conditioned upon including a substantially
14 * similar Disclaimer requirement for further binary redistribution.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGES.
32 #include <sys/param.h>
33 #include <sys/endian.h>
34 #include <sys/ioctl.h>
35 #include <sys/socket.h>
37 #include <sys/sysctl.h>
38 #include <sys/utsname.h>
39 #include <sys/queue.h>
42 #include <dev/usb/usb.h>
43 #include <dev/usb/usb_pf.h>
44 #include <dev/usb/usbdi.h>
57 #define BPF_STORE_JUMP(x,_c,_k,_jt,_jf) do { \
64 #define BPF_STORE_STMT(x,_c,_k) do { \
72 STAILQ_ENTRY(usb_filt) entry;
78 int fd; /* fd for /dev/usbpf */
90 struct usbcap_filehdr {
92 #define USBCAP_FILEHDR_MAGIC 0x9a90000e
99 /* capture timestamp */
102 /* data length and alignment information */
109 static int doexit = 0;
110 static int pkt_captured = 0;
111 static int verbose = 0;
113 static const char *i_arg = "usbus0";
114 static const char *r_arg = NULL;
115 static const char *w_arg = NULL;
116 static const char *b_arg = NULL;
117 static struct usbcap uc;
118 static const char *errstr_table[USB_ERR_MAX] = {
119 [USB_ERR_NORMAL_COMPLETION] = "0",
120 [USB_ERR_PENDING_REQUESTS] = "PENDING_REQUESTS",
121 [USB_ERR_NOT_STARTED] = "NOT_STARTED",
122 [USB_ERR_INVAL] = "INVAL",
123 [USB_ERR_NOMEM] = "NOMEM",
124 [USB_ERR_CANCELLED] = "CANCELLED",
125 [USB_ERR_BAD_ADDRESS] = "BAD_ADDRESS",
126 [USB_ERR_BAD_BUFSIZE] = "BAD_BUFSIZE",
127 [USB_ERR_BAD_FLAG] = "BAD_FLAG",
128 [USB_ERR_NO_CALLBACK] = "NO_CALLBACK",
129 [USB_ERR_IN_USE] = "IN_USE",
130 [USB_ERR_NO_ADDR] = "NO_ADDR",
131 [USB_ERR_NO_PIPE] = "NO_PIPE",
132 [USB_ERR_ZERO_NFRAMES] = "ZERO_NFRAMES",
133 [USB_ERR_ZERO_MAXP] = "ZERO_MAXP",
134 [USB_ERR_SET_ADDR_FAILED] = "SET_ADDR_FAILED",
135 [USB_ERR_NO_POWER] = "NO_POWER",
136 [USB_ERR_TOO_DEEP] = "TOO_DEEP",
137 [USB_ERR_IOERROR] = "IOERROR",
138 [USB_ERR_NOT_CONFIGURED] = "NOT_CONFIGURED",
139 [USB_ERR_TIMEOUT] = "TIMEOUT",
140 [USB_ERR_SHORT_XFER] = "SHORT_XFER",
141 [USB_ERR_STALLED] = "STALLED",
142 [USB_ERR_INTERRUPTED] = "INTERRUPTED",
143 [USB_ERR_DMA_LOAD_FAILED] = "DMA_LOAD_FAILED",
144 [USB_ERR_BAD_CONTEXT] = "BAD_CONTEXT",
145 [USB_ERR_NO_ROOT_HUB] = "NO_ROOT_HUB",
146 [USB_ERR_NO_INTR_THREAD] = "NO_INTR_THREAD",
147 [USB_ERR_NOT_LOCKED] = "NOT_LOCKED",
150 static const char *xfertype_table[4] = {
151 [UE_CONTROL] = "CTRL",
152 [UE_ISOCHRONOUS] = "ISOC",
154 [UE_INTERRUPT] = "INTR"
157 static const char *speed_table[USB_SPEED_MAX] = {
158 [USB_SPEED_FULL] = "FULL",
159 [USB_SPEED_HIGH] = "HIGH",
160 [USB_SPEED_LOW] = "LOW",
161 [USB_SPEED_VARIABLE] = "VARI",
162 [USB_SPEED_SUPER] = "SUPER",
165 static STAILQ_HEAD(,usb_filt) usb_filt_head =
166 STAILQ_HEAD_INITIALIZER(usb_filt_head);
169 add_filter(int usb_filt_unit, int usb_filt_ep)
171 struct usb_filt *puf;
173 puf = malloc(sizeof(struct usb_filt));
175 errx(EX_SOFTWARE, "Out of memory.");
177 puf->unit = usb_filt_unit;
178 puf->endpoint = usb_filt_ep;
180 STAILQ_INSERT_TAIL(&usb_filt_head, puf, entry);
184 make_filter(struct bpf_program *pprog, int snapshot)
186 struct usb_filt *puf;
187 struct bpf_insn *dynamic_insn;
192 STAILQ_FOREACH(puf, &usb_filt_head, entry)
195 dynamic_insn = malloc(((len * 5) + 1) * sizeof(struct bpf_insn));
197 if (dynamic_insn == NULL)
198 errx(EX_SOFTWARE, "Out of memory.");
203 /* accept all packets */
205 BPF_STORE_STMT(dynamic_insn[0], BPF_RET | BPF_K, snapshot);
212 STAILQ_FOREACH(puf, &usb_filt_head, entry) {
213 const int addr_off = (uintptr_t)&((struct usbpf_pkthdr *)0)->up_address;
214 const int addr_ep = (uintptr_t)&((struct usbpf_pkthdr *)0)->up_endpoint;
216 if (puf->unit != -1) {
217 if (puf->endpoint != -1) {
218 BPF_STORE_STMT(dynamic_insn[len],
219 BPF_LD | BPF_B | BPF_ABS, addr_off);
221 BPF_STORE_JUMP(dynamic_insn[len],
222 BPF_JMP | BPF_JEQ | BPF_K, (uint8_t)puf->unit, 0, 3);
224 BPF_STORE_STMT(dynamic_insn[len],
225 BPF_LD | BPF_W | BPF_ABS, addr_ep);
227 BPF_STORE_JUMP(dynamic_insn[len],
228 BPF_JMP | BPF_JEQ | BPF_K, htobe32(puf->endpoint), 0, 1);
231 BPF_STORE_STMT(dynamic_insn[len],
232 BPF_LD | BPF_B | BPF_ABS, addr_off);
234 BPF_STORE_JUMP(dynamic_insn[len],
235 BPF_JMP | BPF_JEQ | BPF_K, (uint8_t)puf->unit, 0, 1);
239 if (puf->endpoint != -1) {
240 BPF_STORE_STMT(dynamic_insn[len],
241 BPF_LD | BPF_W | BPF_ABS, addr_ep);
243 BPF_STORE_JUMP(dynamic_insn[len],
244 BPF_JMP | BPF_JEQ | BPF_K, htobe32(puf->endpoint), 0, 1);
248 BPF_STORE_STMT(dynamic_insn[len],
249 BPF_RET | BPF_K, snapshot);
253 BPF_STORE_STMT(dynamic_insn[len], BPF_RET | BPF_K, 0);
258 pprog->bf_insns = dynamic_insn;
262 match_filter(int unit, int endpoint)
264 struct usb_filt *puf;
266 if (STAILQ_FIRST(&usb_filt_head) == NULL)
269 STAILQ_FOREACH(puf, &usb_filt_head, entry) {
270 if ((puf->unit == -1 || puf->unit == unit) &&
271 (puf->endpoint == -1 || puf->endpoint == endpoint))
278 free_filter(struct bpf_program *pprog)
280 struct usb_filt *puf;
282 while ((puf = STAILQ_FIRST(&usb_filt_head)) != NULL) {
283 STAILQ_REMOVE_HEAD(&usb_filt_head, entry);
286 free(pprog->bf_insns);
290 handle_sigint(int sig)
297 #define FLAGS(x, name) \
298 (((x) & USBPF_FLAG_##name) ? #name "|" : "")
300 #define STATUS(x, name) \
301 (((x) & USBPF_STATUS_##name) ? #name "|" : "")
304 usb_errstr(uint32_t error)
306 if (error >= USB_ERR_MAX || errstr_table[error] == NULL)
309 return (errstr_table[error]);
313 usb_speedstr(uint8_t speed)
315 if (speed >= USB_SPEED_MAX || speed_table[speed] == NULL)
318 return (speed_table[speed]);
322 print_flags(uint32_t flags)
324 printf(" flags %#x <%s%s%s%s%s%s%s%s%s0>\n",
326 FLAGS(flags, FORCE_SHORT_XFER),
327 FLAGS(flags, SHORT_XFER_OK),
328 FLAGS(flags, SHORT_FRAMES_OK),
329 FLAGS(flags, PIPE_BOF),
330 FLAGS(flags, PROXY_BUFFER),
331 FLAGS(flags, EXT_BUFFER),
332 FLAGS(flags, MANUAL_STATUS),
333 FLAGS(flags, NO_PIPE_OK),
334 FLAGS(flags, STALL_PIPE));
338 print_status(uint32_t status)
340 printf(" status %#x <%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s0>\n",
342 STATUS(status, OPEN),
343 STATUS(status, TRANSFERRING),
344 STATUS(status, DID_DMA_DELAY),
345 STATUS(status, DID_CLOSE),
346 STATUS(status, DRAINING),
347 STATUS(status, STARTED),
348 STATUS(status, BW_RECLAIMED),
349 STATUS(status, CONTROL_XFR),
350 STATUS(status, CONTROL_HDR),
351 STATUS(status, CONTROL_ACT),
352 STATUS(status, CONTROL_STALL),
353 STATUS(status, SHORT_FRAMES_OK),
354 STATUS(status, SHORT_XFER_OK),
355 STATUS(status, BDMA_ENABLE),
356 STATUS(status, BDMA_NO_POST_SYNC),
357 STATUS(status, BDMA_SETUP),
358 STATUS(status, ISOCHRONOUS_XFR),
359 STATUS(status, CURR_DMA_SET),
360 STATUS(status, CAN_CANCEL_IMMED),
361 STATUS(status, DOING_CALLBACK));
365 * Dump a byte into hex format.
368 hexbyte(char *buf, uint8_t temp)
379 buf[0] = 'A' + hi - 10;
384 buf[1] = 'A' + lo - 10;
388 * Display a region in traditional hexdump format.
391 hexdump(const uint8_t *region, uint32_t len)
399 for (line = region; line < (region + len); line += 16) {
404 hexbyte(linebuf + i + 1, ((line - region) >> 8) & 0xFF);
405 hexbyte(linebuf + i + 3, (line - region) & 0xFF);
406 linebuf[i + 5] = ' ';
407 linebuf[i + 6] = ' ';
410 for (x = 0; x < 16; x++) {
411 if ((line + x) < (region + len)) {
413 *(const u_int8_t *)(line + x));
416 linebuf[i + 1] = '-';
418 linebuf[i + 2] = ' ';
420 linebuf[i + 3] = ' ';
427 linebuf[i + 1] = '|';
429 for (x = 0; x < 16; x++) {
430 if ((line + x) < (region + len)) {
431 c = *(const u_int8_t *)(line + x);
433 if ((c < ' ') || (c > '~'))
449 print_apacket(const struct header_32 *hdr, const uint8_t *ptr, int ptr_len)
452 struct usbpf_pkthdr up_temp;
453 struct usbpf_pkthdr *up;
459 ptr += USBPF_HDR_LEN;
460 ptr_len -= USBPF_HDR_LEN;
464 /* make sure we don't change the source buffer */
465 memcpy(&up_temp, ptr - USBPF_HDR_LEN, sizeof(up_temp));
469 * A packet from the kernel is based on little endian byte
472 up->up_totlen = le32toh(up->up_totlen);
473 up->up_busunit = le32toh(up->up_busunit);
474 up->up_flags = le32toh(up->up_flags);
475 up->up_status = le32toh(up->up_status);
476 up->up_error = le32toh(up->up_error);
477 up->up_interval = le32toh(up->up_interval);
478 up->up_frames = le32toh(up->up_frames);
479 up->up_packet_size = le32toh(up->up_packet_size);
480 up->up_packet_count = le32toh(up->up_packet_count);
481 up->up_endpoint = le32toh(up->up_endpoint);
483 if (!match_filter(up->up_address, up->up_endpoint))
486 tv.tv_sec = hdr->ts_sec;
487 tv.tv_usec = hdr->ts_usec;
488 tm = localtime(&tv.tv_sec);
490 len = strftime(buf, sizeof(buf), "%H:%M:%S", tm);
493 printf("%.*s.%06ld usbus%d.%d %s-%s-EP=%08x,SPD=%s,NFR=%d,SLEN=%d,IVAL=%d%s%s\n",
494 (int)len, buf, tv.tv_usec,
495 (int)up->up_busunit, (int)up->up_address,
496 (up->up_type == USBPF_XFERTAP_SUBMIT) ? "SUBM" : "DONE",
497 xfertype_table[up->up_xfertype],
498 (unsigned int)up->up_endpoint,
499 usb_speedstr(up->up_speed),
501 (int)(up->up_totlen - USBPF_HDR_LEN -
502 (USBPF_FRAME_HDR_LEN * up->up_frames)),
503 (int)up->up_interval,
504 (up->up_type == USBPF_XFERTAP_DONE) ? ",ERR=" : "",
505 (up->up_type == USBPF_XFERTAP_DONE) ?
506 usb_errstr(up->up_error) : "");
509 if (verbose >= 1 || b_arg != NULL) {
510 for (x = 0; x != up->up_frames; x++) {
511 const struct usbpf_framehdr *uf;
515 uf = (const struct usbpf_framehdr *)ptr;
516 ptr += USBPF_FRAME_HDR_LEN;
517 ptr_len -= USBPF_FRAME_HDR_LEN;
521 framelen = le32toh(uf->length);
522 flags = le32toh(uf->flags);
525 printf(" frame[%u] %s %d bytes\n",
527 (flags & USBPF_FRAMEFLAG_READ) ? "READ" : "WRITE",
531 if (flags & USBPF_FRAMEFLAG_DATA_FOLLOWS) {
535 tot_frame_len = USBPF_FRAME_ALIGN(framelen);
537 ptr_len -= tot_frame_len;
539 if (tot_frame_len < 0 ||
540 (int)framelen < 0 || (int)ptr_len < 0)
544 struct usbcap *p = &uc;
546 ret = write(p->bfd, ptr, framelen);
547 if (ret != (int)framelen)
548 err(EXIT_FAILURE, "Could not write binary data");
551 hexdump(ptr, framelen);
553 ptr += tot_frame_len;
558 print_flags(up->up_flags);
560 print_status(up->up_status);
564 fix_packets(uint8_t *data, const int datalen)
566 struct header_32 temp;
572 for (ptr = data; ptr < (data + datalen); ptr = next) {
574 const struct bpf_hdr *hdr;
576 hdr = (const struct bpf_hdr *)ptr;
578 temp.ts_sec = htole32(hdr->bh_tstamp.tv_sec);
579 temp.ts_usec = htole32(hdr->bh_tstamp.tv_usec);
580 temp.caplen = htole32(hdr->bh_caplen);
581 temp.datalen = htole32(hdr->bh_datalen);
582 temp.hdrlen = hdr->bh_hdrlen;
583 temp.align = BPF_WORDALIGN(1);
585 hdrlen = hdr->bh_hdrlen;
586 caplen = hdr->bh_caplen;
588 if ((hdrlen >= sizeof(temp)) && (hdrlen <= 255) &&
589 ((ptr + hdrlen) <= (data + datalen))) {
590 memcpy(ptr, &temp, sizeof(temp));
591 memset(ptr + sizeof(temp), 0, hdrlen - sizeof(temp));
593 err(EXIT_FAILURE, "Invalid header length %d", hdrlen);
596 next = ptr + BPF_WORDALIGN(hdrlen + caplen);
599 err(EXIT_FAILURE, "Invalid length");
604 print_packets(uint8_t *data, const int datalen)
606 struct header_32 temp;
610 for (ptr = data; ptr < (data + datalen); ptr = next) {
612 const struct header_32 *hdr32;
614 hdr32 = (const struct header_32 *)ptr;
616 temp.ts_sec = le32toh(hdr32->ts_sec);
617 temp.ts_usec = le32toh(hdr32->ts_usec);
618 temp.caplen = le32toh(hdr32->caplen);
619 temp.datalen = le32toh(hdr32->datalen);
620 temp.hdrlen = hdr32->hdrlen;
621 temp.align = hdr32->align;
623 next = ptr + roundup2(temp.hdrlen + temp.caplen, temp.align);
626 err(EXIT_FAILURE, "Invalid length");
628 if (verbose >= 0 || r_arg != NULL || b_arg != NULL) {
629 print_apacket(&temp, ptr +
630 temp.hdrlen, temp.caplen);
637 write_packets(struct usbcap *p, const uint8_t *data, const int datalen)
639 int len = htole32(datalen);
642 ret = write(p->wfd, &len, sizeof(int));
643 if (ret != sizeof(int)) {
644 err(EXIT_FAILURE, "Could not write length "
645 "field of USB data payload");
647 ret = write(p->wfd, data, datalen);
648 if (ret != datalen) {
649 err(EXIT_FAILURE, "Could not write "
650 "complete USB data payload");
655 read_file(struct usbcap *p)
661 while ((ret = read(p->rfd, &datalen, sizeof(int))) == sizeof(int)) {
662 datalen = le32toh(datalen);
663 data = malloc(datalen);
665 errx(EX_SOFTWARE, "Out of memory.");
666 ret = read(p->rfd, data, datalen);
667 if (ret != datalen) {
668 err(EXIT_FAILURE, "Could not read complete "
672 fix_packets(data, datalen);
674 print_packets(data, datalen);
680 do_loop(struct usbcap *p)
684 while (doexit == 0) {
685 cc = read(p->fd, (uint8_t *)p->buffer, p->bufsize);
691 fprintf(stderr, "read: %s\n", strerror(errno));
699 fix_packets(p->buffer, cc);
702 write_packets(p, p->buffer, cc);
703 print_packets(p->buffer, cc);
708 init_rfile(struct usbcap *p)
710 struct usbcap_filehdr uf;
713 p->rfd = open(r_arg, O_RDONLY);
715 err(EXIT_FAILURE, "Could not open "
716 "'%s' for read", r_arg);
718 ret = read(p->rfd, &uf, sizeof(uf));
719 if (ret != sizeof(uf)) {
720 err(EXIT_FAILURE, "Could not read USB capture "
723 if (le32toh(uf.magic) != USBCAP_FILEHDR_MAGIC) {
724 errx(EX_SOFTWARE, "Invalid magic field(0x%08x) "
725 "in USB capture file header.",
726 (unsigned int)le32toh(uf.magic));
729 errx(EX_SOFTWARE, "Invalid major version(%d) "
730 "field in USB capture file header.", (int)uf.major);
735 if (uf.minor != 3 && uf.minor != 2) {
736 errx(EX_SOFTWARE, "Invalid minor version(%d) "
737 "field in USB capture file header.", (int)uf.minor);
742 init_wfile(struct usbcap *p)
744 struct usbcap_filehdr uf;
747 p->wfd = open(w_arg, O_CREAT | O_TRUNC | O_WRONLY, S_IRUSR | S_IWUSR);
749 err(EXIT_FAILURE, "Could not open "
750 "'%s' for write", w_arg);
752 memset(&uf, 0, sizeof(uf));
753 uf.magic = htole32(USBCAP_FILEHDR_MAGIC);
756 ret = write(p->wfd, (const void *)&uf, sizeof(uf));
757 if (ret != sizeof(uf)) {
758 err(EXIT_FAILURE, "Could not write "
759 "USB capture header");
767 #define FMT " %-14s %s\n"
768 fprintf(stderr, "usage: usbdump [options]\n");
769 fprintf(stderr, FMT, "-i <usbusX>", "Listen on USB bus interface");
770 fprintf(stderr, FMT, "-f <unit[.endpoint]>", "Specify a device and endpoint filter");
771 fprintf(stderr, FMT, "-r <file>", "Read the raw packets from file");
772 fprintf(stderr, FMT, "-s <snaplen>", "Snapshot bytes from each packet");
773 fprintf(stderr, FMT, "-v", "Increase the verbose level");
774 fprintf(stderr, FMT, "-b <file>", "Save raw version of all recorded data to file");
775 fprintf(stderr, FMT, "-w <file>", "Write the raw packets to file");
776 fprintf(stderr, FMT, "-h", "Display summary of command line options");
782 check_usb_pf_sysctl(void)
786 size_t no_pf_len = sizeof(int);
788 /* check "hw.usb.no_pf" sysctl for 8- and 9- stable */
790 error = sysctlbyname("hw.usb.no_pf", &no_pf_val,
791 &no_pf_len, NULL, 0);
792 if (error == 0 && no_pf_val != 0) {
793 warnx("The USB packet filter might be disabled.");
794 warnx("See the \"hw.usb.no_pf\" sysctl for more information.");
799 main(int argc, char *argv[])
802 struct bpf_program total_prog;
804 struct bpf_version bv;
805 struct usbcap *p = &uc;
815 const char *optstring;
818 optstring = "b:hi:r:s:vw:f:";
819 while ((o = getopt(argc, argv, optstring)) != -1) {
829 snapshot = strtol(optarg, &pp, 10);
831 if (pp != NULL && *pp != 0)
833 if (snapshot == 0 && errno == EINVAL)
835 /* snapeshot == 0 is special */
850 filt_unit = strtol(optarg, &pp, 10);
854 filt_ep = strtol(pp + 1, &pp, 10);
855 if (pp != NULL && *pp != 0)
857 } else if (*pp != 0) {
861 add_filter(filt_unit, filt_ep);
870 p->bfd = open(b_arg, O_CREAT | O_TRUNC |
871 O_WRONLY, S_IRUSR | S_IWUSR);
873 err(EXIT_FAILURE, "Could not open "
874 "'%s' for write", b_arg);
879 * Require more verbosity to print anything when -w or -b is
880 * specified on the command line:
882 if (w_arg != NULL || b_arg != NULL)
890 check_usb_pf_sysctl();
892 p->fd = fd = open("/dev/bpf", O_RDONLY);
894 err(EXIT_FAILURE, "Could not open BPF device");
896 if (ioctl(fd, BIOCVERSION, (caddr_t)&bv) < 0)
897 err(EXIT_FAILURE, "BIOCVERSION ioctl failed");
899 if (bv.bv_major != BPF_MAJOR_VERSION ||
900 bv.bv_minor < BPF_MINOR_VERSION)
901 errx(EXIT_FAILURE, "Kernel BPF filter out of date");
903 /* USB transfers can be greater than 64KByte */
906 /* clear ifr structure */
907 memset(&ifr, 0, sizeof(ifr));
909 /* Try to create usbusN interface if it is not available. */
910 s = socket(AF_LOCAL, SOCK_DGRAM, 0);
912 errx(EXIT_FAILURE, "Could not open a socket");
913 ifindex = if_nametoindex(i_arg);
915 (void)strlcpy(ifr.ifr_name, i_arg, sizeof(ifr.ifr_name));
916 if (ioctl(s, SIOCIFCREATE2, &ifr) < 0)
917 errx(EXIT_FAILURE, "Invalid bus interface: %s", i_arg);
920 for ( ; v >= USBPF_HDR_LEN; v >>= 1) {
921 (void)ioctl(fd, BIOCSBLEN, (caddr_t)&v);
922 (void)strlcpy(ifr.ifr_name, i_arg, sizeof(ifr.ifr_name));
923 if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) >= 0)
927 errx(EXIT_FAILURE, "No buffer size worked.");
929 if (ioctl(fd, BIOCGBLEN, (caddr_t)&v) < 0)
930 err(EXIT_FAILURE, "BIOCGBLEN ioctl failed");
933 p->buffer = (uint8_t *)malloc(p->bufsize);
934 if (p->buffer == NULL)
935 errx(EX_SOFTWARE, "Out of memory.");
937 make_filter(&total_prog, snapshot);
939 if (ioctl(p->fd, BIOCSETF, (caddr_t)&total_prog) < 0)
940 err(EXIT_FAILURE, "BIOCSETF ioctl failed");
942 free_filter(&total_prog);
944 /* 1 second read timeout */
947 if (ioctl(p->fd, BIOCSRTIMEOUT, (caddr_t)&tv) < 0)
948 err(EXIT_FAILURE, "BIOCSRTIMEOUT ioctl failed");
950 (void)signal(SIGINT, handle_sigint);
954 if (ioctl(fd, BIOCGSTATS, (caddr_t)&us) < 0)
955 err(EXIT_FAILURE, "BIOCGSTATS ioctl failed");
957 /* XXX what's difference between pkt_captured and us.us_recv? */
959 printf("%d packets captured\n", pkt_captured);
960 printf("%d packets received by filter\n", us.bs_recv);
961 printf("%d packets dropped by kernel\n", us.bs_drop);
964 * Destroy the usbusN interface only if it was created by
965 * usbdump(8). Ignore when it was already destroyed.
967 if (ifindex == 0 && if_nametoindex(i_arg) > 0) {
968 (void)strlcpy(ifr.ifr_name, i_arg, sizeof(ifr.ifr_name));
969 if (ioctl(s, SIOCIFDESTROY, &ifr) < 0)
970 warn("SIOCIFDESTROY ioctl failed");
983 return (EXIT_SUCCESS);