1/*- 2 * Copyright (c) 2010 Weongyo Jeong <weongyo@freebsd.org> 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 * 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. 15 * 16 * NO WARRANTY 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. 28 * 29 * $FreeBSD$ 30 */ 31 32#include <sys/param.h> 33#include <sys/endian.h> 34#include <sys/ioctl.h> 35#include <sys/socket.h> 36#include <sys/stat.h> 37#include <sys/utsname.h> 38#include <sys/queue.h> 39#include <net/if.h> 40#include <net/bpf.h> 41#include <dev/usb/usb.h> 42#include <dev/usb/usb_pf.h> 43#include <dev/usb/usbdi.h> 44#include <errno.h> 45#include <fcntl.h> 46#include <limits.h> 47#include <stdio.h> 48#include <stdlib.h> 49#include <stdint.h> 50#include <string.h> 51#include <time.h> 52#include <unistd.h> 53#include <sysexits.h> 54#include <err.h> 55 56#define BPF_STORE_JUMP(x,_c,_k,_jt,_jf) do { \ 57 (x).code = (_c); \ 58 (x).k = (_k); \ 59 (x).jt = (_jt); \ 60 (x).jf = (_jf); \ 61} while (0) 62 63#define BPF_STORE_STMT(x,_c,_k) do { \ 64 (x).code = (_c); \ 65 (x).k = (_k); \ 66 (x).jt = 0; \ 67 (x).jf = 0; \ 68} while (0) 69 70struct usb_filt { 71 STAILQ_ENTRY(usb_filt) entry; 72 int unit; 73 int endpoint; 74}; 75 76struct usbcap { 77 int fd; /* fd for /dev/usbpf */ 78 uint32_t bufsize; 79 uint8_t *buffer; 80 81 /* for -w option */ 82 int wfd; 83 /* for -r option */ 84 int rfd; 85 /* for -b option */ 86 int bfd; 87}; 88 89struct usbcap_filehdr { 90 uint32_t magic; 91#define USBCAP_FILEHDR_MAGIC 0x9a90000e 92 uint8_t major; 93 uint8_t minor; 94 uint8_t reserved[26]; 95} __packed; 96 97#define HEADER_ALIGN(x,a) (((x) + (a) - 1) & ~((a) - 1)) 98 99struct header_32 { 100 /* capture timestamp */ 101 uint32_t ts_sec; 102 uint32_t ts_usec; 103 /* data length and alignment information */ 104 uint32_t caplen; 105 uint32_t datalen; 106 uint8_t hdrlen; 107 uint8_t align; 108} __packed; 109 110static int doexit = 0; 111static int pkt_captured = 0; 112static int verbose = 0; 113static int uf_minor; 114static const char *i_arg = "usbus0"; 115static const char *r_arg = NULL; 116static const char *w_arg = NULL; 117static const char *b_arg = NULL; 118static struct usbcap uc; 119static const char *errstr_table[USB_ERR_MAX] = { 120 [USB_ERR_NORMAL_COMPLETION] = "0", 121 [USB_ERR_PENDING_REQUESTS] = "PENDING_REQUESTS", 122 [USB_ERR_NOT_STARTED] = "NOT_STARTED", 123 [USB_ERR_INVAL] = "INVAL", 124 [USB_ERR_NOMEM] = "NOMEM", 125 [USB_ERR_CANCELLED] = "CANCELLED", 126 [USB_ERR_BAD_ADDRESS] = "BAD_ADDRESS", 127 [USB_ERR_BAD_BUFSIZE] = "BAD_BUFSIZE", 128 [USB_ERR_BAD_FLAG] = "BAD_FLAG", 129 [USB_ERR_NO_CALLBACK] = "NO_CALLBACK", 130 [USB_ERR_IN_USE] = "IN_USE", 131 [USB_ERR_NO_ADDR] = "NO_ADDR", 132 [USB_ERR_NO_PIPE] = "NO_PIPE", 133 [USB_ERR_ZERO_NFRAMES] = "ZERO_NFRAMES", 134 [USB_ERR_ZERO_MAXP] = "ZERO_MAXP", 135 [USB_ERR_SET_ADDR_FAILED] = "SET_ADDR_FAILED", 136 [USB_ERR_NO_POWER] = "NO_POWER", 137 [USB_ERR_TOO_DEEP] = "TOO_DEEP", 138 [USB_ERR_IOERROR] = "IOERROR", 139 [USB_ERR_NOT_CONFIGURED] = "NOT_CONFIGURED", 140 [USB_ERR_TIMEOUT] = "TIMEOUT", 141 [USB_ERR_SHORT_XFER] = "SHORT_XFER", 142 [USB_ERR_STALLED] = "STALLED", 143 [USB_ERR_INTERRUPTED] = "INTERRUPTED", 144 [USB_ERR_DMA_LOAD_FAILED] = "DMA_LOAD_FAILED", 145 [USB_ERR_BAD_CONTEXT] = "BAD_CONTEXT", 146 [USB_ERR_NO_ROOT_HUB] = "NO_ROOT_HUB", 147 [USB_ERR_NO_INTR_THREAD] = "NO_INTR_THREAD", 148 [USB_ERR_NOT_LOCKED] = "NOT_LOCKED", 149}; 150 151static const char *xfertype_table[4] = { 152 [UE_CONTROL] = "CTRL", 153 [UE_ISOCHRONOUS] = "ISOC", 154 [UE_BULK] = "BULK", 155 [UE_INTERRUPT] = "INTR" 156}; 157 158static const char *speed_table[USB_SPEED_MAX] = { 159 [USB_SPEED_FULL] = "FULL", 160 [USB_SPEED_HIGH] = "HIGH", 161 [USB_SPEED_LOW] = "LOW", 162 [USB_SPEED_VARIABLE] = "VARI", 163 [USB_SPEED_SUPER] = "SUPER", 164}; 165 166static STAILQ_HEAD(,usb_filt) usb_filt_head = 167 STAILQ_HEAD_INITIALIZER(usb_filt_head); 168 169static void 170add_filter(int usb_filt_unit, int usb_filt_ep) 171{ 172 struct usb_filt *puf; 173 174 puf = malloc(sizeof(struct usb_filt)); 175 if (puf == NULL) 176 errx(EX_SOFTWARE, "Out of memory."); 177 178 puf->unit = usb_filt_unit; 179 puf->endpoint = usb_filt_ep; 180 181 STAILQ_INSERT_TAIL(&usb_filt_head, puf, entry); 182} 183 184static void 185make_filter(struct bpf_program *pprog, int snapshot) 186{ 187 struct usb_filt *puf; 188 struct bpf_insn *dynamic_insn; 189 int len; 190 191 len = 0; 192 193 STAILQ_FOREACH(puf, &usb_filt_head, entry) 194 len++; 195 196 dynamic_insn = malloc(((len * 5) + 1) * sizeof(struct bpf_insn)); 197 198 if (dynamic_insn == NULL) 199 errx(EX_SOFTWARE, "Out of memory."); 200 201 len++; 202 203 if (len == 1) { 204 /* accept all packets */ 205 206 BPF_STORE_STMT(dynamic_insn[0], BPF_RET | BPF_K, snapshot); 207 208 goto done; 209 } 210 211 len = 0; 212 213 STAILQ_FOREACH(puf, &usb_filt_head, entry) { 214 const int addr_off = (uintptr_t)&((struct usbpf_pkthdr *)0)->up_address; 215 const int addr_ep = (uintptr_t)&((struct usbpf_pkthdr *)0)->up_endpoint; 216 217 if (puf->unit != -1) { 218 if (puf->endpoint != -1) { 219 BPF_STORE_STMT(dynamic_insn[len], 220 BPF_LD | BPF_B | BPF_ABS, addr_off); 221 len++; 222 BPF_STORE_JUMP(dynamic_insn[len], 223 BPF_JMP | BPF_JEQ | BPF_K, (uint8_t)puf->unit, 0, 3); 224 len++; 225 BPF_STORE_STMT(dynamic_insn[len], 226 BPF_LD | BPF_W | BPF_ABS, addr_ep); 227 len++; 228 BPF_STORE_JUMP(dynamic_insn[len], 229 BPF_JMP | BPF_JEQ | BPF_K, htobe32(puf->endpoint), 0, 1); 230 len++; 231 } else { 232 BPF_STORE_STMT(dynamic_insn[len], 233 BPF_LD | BPF_B | BPF_ABS, addr_off); 234 len++; 235 BPF_STORE_JUMP(dynamic_insn[len], 236 BPF_JMP | BPF_JEQ | BPF_K, (uint8_t)puf->unit, 0, 1); 237 len++; 238 } 239 } else { 240 if (puf->endpoint != -1) { 241 BPF_STORE_STMT(dynamic_insn[len], 242 BPF_LD | BPF_W | BPF_ABS, addr_ep); 243 len++; 244 BPF_STORE_JUMP(dynamic_insn[len], 245 BPF_JMP | BPF_JEQ | BPF_K, htobe32(puf->endpoint), 0, 1); 246 len++; 247 } 248 } 249 BPF_STORE_STMT(dynamic_insn[len], 250 BPF_RET | BPF_K, snapshot); 251 len++; 252 } 253 254 BPF_STORE_STMT(dynamic_insn[len], BPF_RET | BPF_K, 0); 255 len++; 256 257done: 258 pprog->bf_len = len; 259 pprog->bf_insns = dynamic_insn; 260} 261 262static int 263match_filter(int unit, int endpoint) 264{ 265 struct usb_filt *puf; 266 267 if (STAILQ_FIRST(&usb_filt_head) == NULL) 268 return (1); 269 270 STAILQ_FOREACH(puf, &usb_filt_head, entry) { 271 if ((puf->unit == -1 || puf->unit == unit) && 272 (puf->endpoint == -1 || puf->endpoint == endpoint)) 273 return (1); 274 } 275 return (0); 276} 277 278static void 279free_filter(struct bpf_program *pprog) 280{ 281 struct usb_filt *puf; 282 283 while ((puf = STAILQ_FIRST(&usb_filt_head)) != NULL) { 284 STAILQ_REMOVE_HEAD(&usb_filt_head, entry); 285 free(puf); 286 } 287 free(pprog->bf_insns); 288} 289 290static void 291handle_sigint(int sig) 292{ 293 294 (void)sig; 295 doexit = 1; 296} 297 298#define FLAGS(x, name) \ 299 (((x) & USBPF_FLAG_##name) ? #name "|" : "") 300 301#define STATUS(x, name) \ 302 (((x) & USBPF_STATUS_##name) ? #name "|" : "") 303 304static const char * 305usb_errstr(uint32_t error) 306{ 307 if (error >= USB_ERR_MAX || errstr_table[error] == NULL) 308 return ("UNKNOWN"); 309 else 310 return (errstr_table[error]); 311} 312 313static const char * 314usb_speedstr(uint8_t speed) 315{ 316 if (speed >= USB_SPEED_MAX || speed_table[speed] == NULL) 317 return ("UNKNOWN"); 318 else 319 return (speed_table[speed]); 320} 321 322static void 323print_flags(uint32_t flags) 324{ 325 printf(" flags %#x <%s%s%s%s%s%s%s%s%s0>\n", 326 flags, 327 FLAGS(flags, FORCE_SHORT_XFER), 328 FLAGS(flags, SHORT_XFER_OK), 329 FLAGS(flags, SHORT_FRAMES_OK), 330 FLAGS(flags, PIPE_BOF), 331 FLAGS(flags, PROXY_BUFFER), 332 FLAGS(flags, EXT_BUFFER), 333 FLAGS(flags, MANUAL_STATUS), 334 FLAGS(flags, NO_PIPE_OK), 335 FLAGS(flags, STALL_PIPE)); 336} 337 338static void 339print_status(uint32_t status) 340{ 341 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, 343 STATUS(status, OPEN), 344 STATUS(status, TRANSFERRING), 345 STATUS(status, DID_DMA_DELAY), 346 STATUS(status, DID_CLOSE), 347 STATUS(status, DRAINING), 348 STATUS(status, STARTED), 349 STATUS(status, BW_RECLAIMED), 350 STATUS(status, CONTROL_XFR), 351 STATUS(status, CONTROL_HDR), 352 STATUS(status, CONTROL_ACT), 353 STATUS(status, CONTROL_STALL), 354 STATUS(status, SHORT_FRAMES_OK), 355 STATUS(status, SHORT_XFER_OK), 356 STATUS(status, BDMA_ENABLE), 357 STATUS(status, BDMA_NO_POST_SYNC), 358 STATUS(status, BDMA_SETUP), 359 STATUS(status, ISOCHRONOUS_XFR), 360 STATUS(status, CURR_DMA_SET), 361 STATUS(status, CAN_CANCEL_IMMED), 362 STATUS(status, DOING_CALLBACK)); 363} 364 365/* 366 * Dump a byte into hex format. 367 */ 368static void 369hexbyte(char *buf, uint8_t temp) 370{ 371 uint8_t lo; 372 uint8_t hi; 373 374 lo = temp & 0xF; 375 hi = temp >> 4; 376 377 if (hi < 10) 378 buf[0] = '0' + hi; 379 else 380 buf[0] = 'A' + hi - 10; 381 382 if (lo < 10) 383 buf[1] = '0' + lo; 384 else 385 buf[1] = 'A' + lo - 10; 386} 387 388/* 389 * Display a region in traditional hexdump format. 390 */ 391static void 392hexdump(const uint8_t *region, uint32_t len) 393{ 394 const uint8_t *line; 395 char linebuf[128]; 396 int i; 397 int x; 398 int c; 399 400 for (line = region; line < (region + len); line += 16) { 401 402 i = 0; 403 404 linebuf[i] = ' '; 405 hexbyte(linebuf + i + 1, ((line - region) >> 8) & 0xFF); 406 hexbyte(linebuf + i + 3, (line - region) & 0xFF); 407 linebuf[i + 5] = ' '; 408 linebuf[i + 6] = ' '; 409 i += 7; 410 411 for (x = 0; x < 16; x++) { 412 if ((line + x) < (region + len)) { 413 hexbyte(linebuf + i, 414 *(const u_int8_t *)(line + x)); 415 } else { 416 linebuf[i] = '-'; 417 linebuf[i + 1] = '-'; 418 } 419 linebuf[i + 2] = ' '; 420 if (x == 7) { 421 linebuf[i + 3] = ' '; 422 i += 4; 423 } else { 424 i += 3; 425 } 426 } 427 linebuf[i] = ' '; 428 linebuf[i + 1] = '|'; 429 i += 2; 430 for (x = 0; x < 16; x++) { 431 if ((line + x) < (region + len)) { 432 c = *(const u_int8_t *)(line + x); 433 /* !isprint(c) */ 434 if ((c < ' ') || (c > '~')) 435 c = '.'; 436 linebuf[i] = c; 437 } else { 438 linebuf[i] = ' '; 439 } 440 i++; 441 } 442 linebuf[i] = '|'; 443 linebuf[i + 1] = 0; 444 i += 2; 445 puts(linebuf); 446 } 447} 448 449static void 450print_apacket(const struct header_32 *hdr, const uint8_t *ptr, int ptr_len) 451{ 452 struct tm *tm; 453 struct usbpf_pkthdr up_temp; 454 struct usbpf_pkthdr *up; 455 struct timeval tv; 456 size_t len; 457 uint32_t x; 458 char buf[64]; 459 460 ptr += USBPF_HDR_LEN; 461 ptr_len -= USBPF_HDR_LEN; 462 if (ptr_len < 0) 463 return; 464 465 /* make sure we don't change the source buffer */ 466 memcpy(&up_temp, ptr - USBPF_HDR_LEN, sizeof(up_temp)); 467 up = &up_temp; 468 469 /* 470 * A packet from the kernel is based on little endian byte 471 * order. 472 */ 473 up->up_totlen = le32toh(up->up_totlen); 474 up->up_busunit = le32toh(up->up_busunit); 475 up->up_flags = le32toh(up->up_flags); 476 up->up_status = le32toh(up->up_status); 477 up->up_error = le32toh(up->up_error); 478 up->up_interval = le32toh(up->up_interval); 479 up->up_frames = le32toh(up->up_frames); 480 up->up_packet_size = le32toh(up->up_packet_size); 481 up->up_packet_count = le32toh(up->up_packet_count); 482 up->up_endpoint = le32toh(up->up_endpoint); 483 484 if (!match_filter(up->up_address, up->up_endpoint)) 485 return; 486 487 tv.tv_sec = hdr->ts_sec; 488 tv.tv_usec = hdr->ts_usec; 489 tm = localtime(&tv.tv_sec); 490 491 len = strftime(buf, sizeof(buf), "%H:%M:%S", tm); 492 493 if (verbose >= 0) { 494 printf("%.*s.%06ld usbus%d.%d %s-%s-EP=%08x,SPD=%s,NFR=%d,SLEN=%d,IVAL=%d%s%s\n", 495 (int)len, buf, tv.tv_usec, 496 (int)up->up_busunit, (int)up->up_address, 497 (up->up_type == USBPF_XFERTAP_SUBMIT) ? "SUBM" : "DONE", 498 xfertype_table[up->up_xfertype], 499 (unsigned int)up->up_endpoint, 500 usb_speedstr(up->up_speed), 501 (int)up->up_frames, 502 (int)(up->up_totlen - USBPF_HDR_LEN - 503 (USBPF_FRAME_HDR_LEN * up->up_frames)), 504 (int)up->up_interval, 505 (up->up_type == USBPF_XFERTAP_DONE) ? ",ERR=" : "", 506 (up->up_type == USBPF_XFERTAP_DONE) ? 507 usb_errstr(up->up_error) : ""); 508 } 509 510 if (verbose >= 1 || b_arg != NULL) { 511 for (x = 0; x != up->up_frames; x++) { 512 const struct usbpf_framehdr *uf; 513 uint32_t framelen; 514 uint32_t flags; 515 516 uf = (const struct usbpf_framehdr *)ptr; 517 ptr += USBPF_FRAME_HDR_LEN; 518 ptr_len -= USBPF_FRAME_HDR_LEN; 519 if (ptr_len < 0) 520 return; 521 522 framelen = le32toh(uf->length); 523 flags = le32toh(uf->flags); 524 525 if (verbose >= 1) { 526 printf(" frame[%u] %s %d bytes\n", 527 (unsigned int)x, 528 (flags & USBPF_FRAMEFLAG_READ) ? "READ" : "WRITE", 529 (int)framelen); 530 } 531 532 if (flags & USBPF_FRAMEFLAG_DATA_FOLLOWS) { 533 534 int tot_frame_len; 535 536 tot_frame_len = USBPF_FRAME_ALIGN(framelen); 537 538 ptr_len -= tot_frame_len; 539 540 if (tot_frame_len < 0 || 541 (int)framelen < 0 || (int)ptr_len < 0) 542 break; 543 544 if (b_arg != NULL) { 545 struct usbcap *p = &uc; 546 int ret; 547 ret = write(p->bfd, ptr, framelen); 548 if (ret != (int)framelen) 549 err(EXIT_FAILURE, "Could not write binary data"); 550 } 551 if (verbose >= 1) 552 hexdump(ptr, framelen); 553 554 ptr += tot_frame_len; 555 } 556 } 557 } 558 if (verbose >= 2) 559 print_flags(up->up_flags); 560 if (verbose >= 3) 561 print_status(up->up_status); 562} 563 564static void 565fix_packets(uint8_t *data, const int datalen) 566{ 567 struct header_32 temp; 568 uint8_t *ptr; 569 uint8_t *next; 570 uint32_t hdrlen; 571 uint32_t caplen; 572 573 for (ptr = data; ptr < (data + datalen); ptr = next) { 574 575 const struct bpf_hdr *hdr; 576 577 hdr = (const struct bpf_hdr *)ptr; 578 579 temp.ts_sec = htole32(hdr->bh_tstamp.tv_sec); 580 temp.ts_usec = htole32(hdr->bh_tstamp.tv_usec); 581 temp.caplen = htole32(hdr->bh_caplen); 582 temp.datalen = htole32(hdr->bh_datalen); 583 temp.hdrlen = hdr->bh_hdrlen; 584 temp.align = BPF_WORDALIGN(1); 585 586 hdrlen = hdr->bh_hdrlen; 587 caplen = hdr->bh_caplen; 588 589 if ((hdrlen >= sizeof(temp)) && (hdrlen <= 255) && 590 ((ptr + hdrlen) <= (data + datalen))) { 591 memcpy(ptr, &temp, sizeof(temp)); 592 memset(ptr + sizeof(temp), 0, hdrlen - sizeof(temp)); 593 } else { 594 err(EXIT_FAILURE, "Invalid header length %d", hdrlen); 595 } 596 597 next = ptr + BPF_WORDALIGN(hdrlen + caplen); 598 599 if (next <= ptr) 600 err(EXIT_FAILURE, "Invalid length"); 601 } 602} 603 604static void 605print_packets(uint8_t *data, const int datalen) 606{ 607 struct header_32 temp; 608 uint8_t *ptr; 609 uint8_t *next; 610 611 for (ptr = data; ptr < (data + datalen); ptr = next) { 612 613 const struct header_32 *hdr32; 614 615 hdr32 = (const struct header_32 *)ptr; 616 617 temp.ts_sec = le32toh(hdr32->ts_sec); 618 temp.ts_usec = le32toh(hdr32->ts_usec); 619 temp.caplen = le32toh(hdr32->caplen); 620 temp.datalen = le32toh(hdr32->datalen); 621 temp.hdrlen = hdr32->hdrlen; 622 temp.align = hdr32->align; 623 624 next = ptr + HEADER_ALIGN(temp.hdrlen + temp.caplen, temp.align); 625 626 if (next <= ptr) 627 err(EXIT_FAILURE, "Invalid length"); 628 629 if (verbose >= 0 || r_arg != NULL || b_arg != NULL) { 630 print_apacket(&temp, ptr + 631 temp.hdrlen, temp.caplen); 632 } 633 pkt_captured++; 634 } 635} 636 637static void 638write_packets(struct usbcap *p, const uint8_t *data, const int datalen) 639{ 640 int len = htole32(datalen); 641 int ret; 642 643 ret = write(p->wfd, &len, sizeof(int)); 644 if (ret != sizeof(int)) { 645 err(EXIT_FAILURE, "Could not write length " 646 "field of USB data payload"); 647 } 648 ret = write(p->wfd, data, datalen); 649 if (ret != datalen) { 650 err(EXIT_FAILURE, "Could not write " 651 "complete USB data payload"); 652 } 653} 654 655static void 656read_file(struct usbcap *p) 657{ 658 int datalen; 659 int ret; 660 uint8_t *data; 661 662 while ((ret = read(p->rfd, &datalen, sizeof(int))) == sizeof(int)) { 663 datalen = le32toh(datalen); 664 data = malloc(datalen); 665 if (data == NULL) 666 errx(EX_SOFTWARE, "Out of memory."); 667 ret = read(p->rfd, data, datalen); 668 if (ret != datalen) { 669 err(EXIT_FAILURE, "Could not read complete " 670 "USB data payload"); 671 } 672 if (uf_minor == 2) 673 fix_packets(data, datalen); 674 675 print_packets(data, datalen); 676 free(data); 677 } 678} 679 680static void 681do_loop(struct usbcap *p) 682{ 683 int cc; 684 685 while (doexit == 0) { 686 cc = read(p->fd, (uint8_t *)p->buffer, p->bufsize); 687 if (cc < 0) { 688 switch (errno) { 689 case EINTR: 690 break; 691 default: 692 fprintf(stderr, "read: %s\n", strerror(errno)); 693 return; 694 } 695 continue; 696 } 697 if (cc == 0) 698 continue; 699 700 fix_packets(p->buffer, cc); 701 702 if (w_arg != NULL) 703 write_packets(p, p->buffer, cc); 704 print_packets(p->buffer, cc); 705 } 706} 707 708static void 709init_rfile(struct usbcap *p) 710{ 711 struct usbcap_filehdr uf; 712 int ret; 713 714 p->rfd = open(r_arg, O_RDONLY); 715 if (p->rfd < 0) { 716 err(EXIT_FAILURE, "Could not open " 717 "'%s' for read", r_arg); 718 } 719 ret = read(p->rfd, &uf, sizeof(uf)); 720 if (ret != sizeof(uf)) { 721 err(EXIT_FAILURE, "Could not read USB capture " 722 "file header"); 723 } 724 if (le32toh(uf.magic) != USBCAP_FILEHDR_MAGIC) { 725 errx(EX_SOFTWARE, "Invalid magic field(0x%08x) " 726 "in USB capture file header.", 727 (unsigned int)le32toh(uf.magic)); 728 } 729 if (uf.major != 0) { 730 errx(EX_SOFTWARE, "Invalid major version(%d) " 731 "field in USB capture file header.", (int)uf.major); 732 } 733 734 uf_minor = uf.minor; 735 736 if (uf.minor != 3 && uf.minor != 2) { 737 errx(EX_SOFTWARE, "Invalid minor version(%d) " 738 "field in USB capture file header.", (int)uf.minor); 739 } 740} 741 742static void 743init_wfile(struct usbcap *p) 744{ 745 struct usbcap_filehdr uf; 746 int ret; 747 748 p->wfd = open(w_arg, O_CREAT | O_TRUNC | O_WRONLY, S_IRUSR | S_IWUSR); 749 if (p->wfd < 0) { 750 err(EXIT_FAILURE, "Could not open " 751 "'%s' for write", w_arg); 752 } 753 memset(&uf, 0, sizeof(uf)); 754 uf.magic = htole32(USBCAP_FILEHDR_MAGIC); 755 uf.major = 0; 756 uf.minor = 3; 757 ret = write(p->wfd, (const void *)&uf, sizeof(uf)); 758 if (ret != sizeof(uf)) { 759 err(EXIT_FAILURE, "Could not write " 760 "USB capture header"); 761 } 762} 763 764static void 765usage(void) 766{ 767 768#define FMT " %-14s %s\n" 769 fprintf(stderr, "usage: usbdump [options]\n"); 770 fprintf(stderr, FMT, "-i <usbusX>", "Listen on USB bus interface"); 771 fprintf(stderr, FMT, "-f <unit[.endpoint]>", "Specify a device and endpoint filter"); 772 fprintf(stderr, FMT, "-r <file>", "Read the raw packets from file"); 773 fprintf(stderr, FMT, "-s <snaplen>", "Snapshot bytes from each packet"); 774 fprintf(stderr, FMT, "-v", "Increase the verbose level"); 775 fprintf(stderr, FMT, "-b <file>", "Save raw version of all recorded data to file"); 776 fprintf(stderr, FMT, "-w <file>", "Write the raw packets to file"); 777 fprintf(stderr, FMT, "-h", "Display summary of command line options"); 778#undef FMT 779 exit(EX_USAGE); 780} 781 782int 783main(int argc, char *argv[]) 784{ 785 struct timeval tv; 786 struct bpf_program total_prog; 787 struct bpf_stat us; 788 struct bpf_version bv; 789 struct usbcap *p = &uc; 790 struct ifreq ifr; 791 long snapshot = 192; 792 uint32_t v; 793 int fd; 794 int o; 795 int filt_unit; 796 int filt_ep; 797 int s; 798 int ifindex; 799 const char *optstring; 800 char *pp; 801 802 optstring = "b:hi:r:s:vw:f:"; 803 while ((o = getopt(argc, argv, optstring)) != -1) { 804 switch (o) { 805 case 'i': 806 i_arg = optarg; 807 break; 808 case 'r': 809 r_arg = optarg; 810 init_rfile(p); 811 break; 812 case 's': 813 snapshot = strtol(optarg, &pp, 10); 814 errno = 0; 815 if (pp != NULL && *pp != 0) 816 usage(); 817 if (snapshot == 0 && errno == EINVAL) 818 usage(); 819 /* snapeshot == 0 is special */ 820 if (snapshot == 0) 821 snapshot = -1; 822 break; 823 case 'b': 824 b_arg = optarg; 825 break; 826 case 'v': 827 verbose++; 828 break; 829 case 'w': 830 w_arg = optarg; 831 init_wfile(p); 832 break; 833 case 'f': 834 filt_unit = strtol(optarg, &pp, 10); 835 filt_ep = -1; 836 if (pp != NULL) { 837 if (*pp == '.') { 838 filt_ep = strtol(pp + 1, &pp, 10); 839 if (pp != NULL && *pp != 0) 840 usage(); 841 } else if (*pp != 0) { 842 usage(); 843 } 844 } 845 add_filter(filt_unit, filt_ep); 846 break; 847 default: 848 usage(); 849 /* NOTREACHED */ 850 } 851 } 852 853 if (b_arg != NULL) { 854 p->bfd = open(b_arg, O_CREAT | O_TRUNC | 855 O_WRONLY, S_IRUSR | S_IWUSR); 856 if (p->bfd < 0) { 857 err(EXIT_FAILURE, "Could not open " 858 "'%s' for write", b_arg); 859 } 860 } 861 862 /* 863 * Require more verbosity to print anything when -w or -b is 864 * specified on the command line: 865 */ 866 if (w_arg != NULL || b_arg != NULL) 867 verbose--; 868 869 if (r_arg != NULL) { 870 read_file(p); 871 exit(EXIT_SUCCESS); 872 } 873 874 p->fd = fd = open("/dev/bpf", O_RDONLY); 875 if (p->fd < 0) 876 err(EXIT_FAILURE, "Could not open BPF device"); 877 878 if (ioctl(fd, BIOCVERSION, (caddr_t)&bv) < 0) 879 err(EXIT_FAILURE, "BIOCVERSION ioctl failed"); 880 881 if (bv.bv_major != BPF_MAJOR_VERSION || 882 bv.bv_minor < BPF_MINOR_VERSION) 883 errx(EXIT_FAILURE, "Kernel BPF filter out of date"); 884 885 /* USB transfers can be greater than 64KByte */ 886 v = 1U << 16; 887 888 /* clear ifr structure */ 889 memset(&ifr, 0, sizeof(ifr)); 890 891 /* Try to create usbusN interface if it is not available. */ 892 s = socket(AF_LOCAL, SOCK_DGRAM, 0); 893 if (s < 0) 894 errx(EXIT_FAILURE, "Could not open a socket"); 895 ifindex = if_nametoindex(i_arg); 896 if (ifindex == 0) { 897 (void)strlcpy(ifr.ifr_name, i_arg, sizeof(ifr.ifr_name)); 898 if (ioctl(s, SIOCIFCREATE2, &ifr) < 0) 899 errx(EXIT_FAILURE, "Invalid bus interface: %s", i_arg); 900 } 901 902 for ( ; v >= USBPF_HDR_LEN; v >>= 1) { 903 (void)ioctl(fd, BIOCSBLEN, (caddr_t)&v); 904 (void)strlcpy(ifr.ifr_name, i_arg, sizeof(ifr.ifr_name)); 905 if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) >= 0) 906 break; 907 } 908 if (v == 0) 909 errx(EXIT_FAILURE, "No buffer size worked."); 910 911 if (ioctl(fd, BIOCGBLEN, (caddr_t)&v) < 0) 912 err(EXIT_FAILURE, "BIOCGBLEN ioctl failed"); 913 914 p->bufsize = v; 915 p->buffer = (uint8_t *)malloc(p->bufsize); 916 if (p->buffer == NULL) 917 errx(EX_SOFTWARE, "Out of memory."); 918 919 make_filter(&total_prog, snapshot); 920 921 if (ioctl(p->fd, BIOCSETF, (caddr_t)&total_prog) < 0) 922 err(EXIT_FAILURE, "BIOCSETF ioctl failed"); 923 924 free_filter(&total_prog); 925 926 /* 1 second read timeout */ 927 tv.tv_sec = 1; 928 tv.tv_usec = 0; 929 if (ioctl(p->fd, BIOCSRTIMEOUT, (caddr_t)&tv) < 0) 930 err(EXIT_FAILURE, "BIOCSRTIMEOUT ioctl failed"); 931 932 (void)signal(SIGINT, handle_sigint); 933 934 do_loop(p); 935 936 if (ioctl(fd, BIOCGSTATS, (caddr_t)&us) < 0) 937 err(EXIT_FAILURE, "BIOCGSTATS ioctl failed"); 938 939 /* XXX what's difference between pkt_captured and us.us_recv? */ 940 printf("\n"); 941 printf("%d packets captured\n", pkt_captured); 942 printf("%d packets received by filter\n", us.bs_recv); 943 printf("%d packets dropped by kernel\n", us.bs_drop); 944 945 /* 946 * Destroy the usbusN interface only if it was created by 947 * usbdump(8). Ignore when it was already destroyed. 948 */ 949 if (ifindex == 0 && if_nametoindex(i_arg) > 0) { 950 (void)strlcpy(ifr.ifr_name, i_arg, sizeof(ifr.ifr_name)); 951 if (ioctl(s, SIOCIFDESTROY, &ifr) < 0) 952 warn("SIOCIFDESTROY ioctl failed"); 953 } 954 close(s); 955 956 if (p->fd > 0) 957 close(p->fd); 958 if (p->rfd > 0) 959 close(p->rfd); 960 if (p->wfd > 0) 961 close(p->wfd); 962 if (p->bfd > 0) 963 close(p->bfd); 964 965 return (EXIT_SUCCESS); 966} 967