1 /* 2 * Copyright (C) 2003 3 * Hidetoshi Shimokawa. 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 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * 16 * This product includes software developed by Hidetoshi Shimokawa. 17 * 18 * 4. Neither the name of the author nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $Id: dconschat.c,v 1.76 2003/10/23 06:21:13 simokawa Exp $ 35 * $FreeBSD: src/usr.sbin/dconschat/dconschat.c,v 1.6 2004/05/26 22:59:54 brooks Exp $ 36 * $DragonFly: src/usr.sbin/dconschat/dconschat.c,v 1.1 2004/09/23 06:38:29 simokawa Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/types.h> 41 #include <sys/uio.h> 42 #include <unistd.h> 43 #include <fcntl.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <termios.h> 47 48 #include <sys/socket.h> 49 #include <netinet/in.h> 50 #include <netdb.h> 51 #include <err.h> 52 #include <string.h> 53 #include <sys/eui64.h> 54 #include <sys/event.h> 55 #include <sys/time.h> 56 #include <arpa/telnet.h> 57 58 #ifdef __DragonFly__ 59 #include <dev/misc/dcons/dcons.h> 60 #include <bus/firewire/firewire.h> 61 #include <bus/firewire/iec13213.h> 62 #else 63 #include <dev/dcons/dcons.h> 64 #include <dev/firewire/firewire.h> 65 #include <dev/firewire/iec13213.h> 66 #endif 67 68 #include <kvm.h> 69 #include <nlist.h> 70 71 #include <sys/errno.h> 72 73 #define DCONS_POLL_HZ 100 74 #define DCONS_POLL_OFFLINE 2 /* sec */ 75 76 #define RETRY 3 77 78 #ifdef CSRVAL_VENDOR_PRIVATE 79 #define USE_CROM 1 80 #else 81 #define USE_CROM 0 82 #endif 83 84 int verbose = 0; 85 int tc_set = 0; 86 int poll_hz = DCONS_POLL_HZ; 87 88 #define IS_CONSOLE(p) ((p)->port == 0) 89 #define IS_GDB(p) ((p)->port == 1) 90 91 static struct dcons_state { 92 int fd; 93 kvm_t *kd; 94 int kq; 95 off_t paddr; 96 #define F_READY (1 << 1) 97 #define F_RD_ONLY (1 << 2) 98 #define F_ALT_BREAK (1 << 3) 99 #define F_TELNET (1 << 4) 100 #define F_USE_CROM (1 << 5) 101 #define F_ONE_SHOT (1 << 6) 102 #define F_REPLAY (1 << 7) 103 int flags; 104 enum { 105 TYPE_KVM, 106 TYPE_FW 107 } type; 108 int escape_state; 109 struct dcons_port { 110 int port; 111 struct dcons_ch o; 112 struct dcons_ch i; 113 u_int32_t optr; 114 u_int32_t iptr; 115 int s; 116 int infd; 117 int outfd; 118 struct addrinfo *res; 119 int skip_read; 120 } port[DCONS_NPORT]; 121 struct timespec to; 122 struct timespec zero; 123 struct termios tsave; 124 } sc; 125 126 static int 127 dread(struct dcons_state *dc, void *buf, size_t n, off_t offset) 128 { 129 switch (dc->type) { 130 case TYPE_FW: 131 return (pread(dc->fd, buf, n, offset)); 132 case TYPE_KVM: 133 return (kvm_read(dc->kd, offset, buf, n)); 134 } 135 return (-1); 136 } 137 138 static int 139 dwrite(struct dcons_state *dc, void *buf, size_t n, off_t offset) 140 { 141 if ((dc->flags & F_RD_ONLY) != 0) 142 return (n); 143 144 switch (dc->type) { 145 case TYPE_FW: 146 return (pwrite(dc->fd, buf, n, offset)); 147 case TYPE_KVM: 148 return (kvm_write(dc->kd, offset, buf, n)); 149 } 150 return (-1); 151 } 152 153 static void 154 dconschat_cleanup(int sig) 155 { 156 struct dcons_state *dc; 157 158 dc = ≻ 159 if (tc_set != 0) 160 tcsetattr(STDIN_FILENO, TCSADRAIN, &dc->tsave); 161 162 if (sig > 0) 163 printf("\n[dconschat exiting with signal %d ...]\n", sig); 164 else 165 printf("\n[dconschat exiting...]\n"); 166 exit(0); 167 } 168 169 #if USE_CROM 170 static int 171 dconschat_get_crom(struct dcons_state *dc) 172 { 173 off_t addr; 174 int i, state = 0; 175 u_int32_t buf, hi = 0, lo = 0; 176 struct csrreg *reg; 177 178 reg = (struct csrreg *)&buf; 179 addr = 0xffff; 180 addr = (addr << 32) | 0xf0000400; 181 for (i = 20; i < 0x400; i += 4) { 182 if (dread(dc, &buf, 4, addr + i) < 0) { 183 if (verbose) 184 warn("crom read faild"); 185 return (-1); 186 } 187 buf = ntohl(buf); 188 if (verbose) 189 printf("%d %02x %06x\n", state, reg->key, reg->val); 190 switch (state) { 191 case 0: 192 if (reg->key == CSRKEY_SPEC && 193 reg->val == CSRVAL_VENDOR_PRIVATE) 194 state = 1; 195 break; 196 case 1: 197 if (reg->key == CSRKEY_VER && 198 reg->val == DCONS_CSR_VAL_VER) 199 state = 2; 200 break; 201 case 2: 202 if (reg->key == DCONS_CSR_KEY_HI) 203 hi = reg->val; 204 else if (reg->key == DCONS_CSR_KEY_LO) { 205 lo = reg->val; 206 goto out; 207 } 208 break; 209 } 210 } 211 /* not found */ 212 return (-1); 213 out: 214 if (verbose) 215 printf("addr: %06x %06x\n", hi, lo); 216 dc->paddr = ((off_t)hi << 24) | lo; 217 return (0); 218 } 219 #endif 220 221 static void 222 dconschat_ready(struct dcons_state *dc, int ready, const char *reason) 223 { 224 static char oldreason[64] = ""; 225 int old; 226 227 old = (dc->flags & F_READY) ? 1 : 0; 228 229 if (ready) { 230 dc->flags |= F_READY; 231 if (ready != old) 232 printf("[dcons connected]\r\n"); 233 oldreason[0] = 0; 234 } else { 235 dc->flags &= ~F_READY; 236 if (strncmp(oldreason, reason, sizeof(oldreason)) != 0) { 237 printf("[dcons disconnected (%s)]\r\n", reason); 238 strlcpy(oldreason, reason, sizeof(oldreason)); 239 } 240 } 241 } 242 243 static int 244 dconschat_fetch_header(struct dcons_state *dc) 245 { 246 char ebuf[64]; 247 struct dcons_buf dbuf; 248 int j; 249 250 #if USE_CROM 251 if (dc->paddr == 0 && (dc->flags & F_USE_CROM) != 0) { 252 if (dconschat_get_crom(dc)) { 253 dconschat_ready(dc, 0, "get crom failed"); 254 return (-1); 255 } 256 } 257 #endif 258 259 if (dread(dc, &dbuf, DCONS_HEADER_SIZE, dc->paddr) < 0) { 260 dconschat_ready(dc, 0, "read header failed"); 261 return (-1); 262 } 263 if (dbuf.magic != htonl(DCONS_MAGIC)) { 264 if ((dc->flags & F_USE_CROM) !=0) 265 dc->paddr = 0; 266 snprintf(ebuf, sizeof(ebuf), "wrong magic 0x%08x", dbuf.magic); 267 dconschat_ready(dc, 0, ebuf); 268 return (-1); 269 } 270 if (ntohl(dbuf.version) != DCONS_VERSION) { 271 snprintf(ebuf, sizeof(ebuf), 272 "wrong version %d,%d", 273 ntohl(dbuf.version), DCONS_VERSION); 274 /* XXX exit? */ 275 dconschat_ready(dc, 0, ebuf); 276 return (-1); 277 } 278 279 for (j = 0; j < DCONS_NPORT; j++) { 280 struct dcons_ch *o, *i; 281 off_t newbuf; 282 int new = 0; 283 284 o = &dc->port[j].o; 285 newbuf = dc->paddr + ntohl(dbuf.ooffset[j]); 286 o->size = ntohl(dbuf.osize[j]); 287 288 if (newbuf != o->buf) { 289 /* buffer address has changes */ 290 new = 1; 291 o->gen = ntohl(dbuf.optr[j]) >> DCONS_GEN_SHIFT; 292 o->pos = ntohl(dbuf.optr[j]) & DCONS_POS_MASK; 293 o->buf = newbuf; 294 } 295 296 i = &dc->port[j].i; 297 i->size = ntohl(dbuf.isize[j]); 298 i->gen = ntohl(dbuf.iptr[j]) >> DCONS_GEN_SHIFT; 299 i->pos = ntohl(dbuf.iptr[j]) & DCONS_POS_MASK; 300 i->buf = dc->paddr + ntohl(dbuf.ioffset[j]); 301 302 if (verbose) { 303 printf("port %d size offset gen pos\n", j); 304 printf("output: %5d %6d %5d %5d\n" 305 "input : %5d %6d %5d %5d\n", 306 o->size, ntohl(dbuf.ooffset[j]), o->gen, o->pos, 307 i->size, ntohl(dbuf.ioffset[j]), i->gen, i->pos); 308 } 309 310 if (IS_CONSOLE(&dc->port[j]) && new && 311 (dc->flags & F_REPLAY) !=0) { 312 if (o->gen > 0) 313 o->gen --; 314 else 315 o->pos = 0; 316 } 317 } 318 dconschat_ready(dc, 1, NULL); 319 return(0); 320 } 321 322 static int 323 dconschat_get_ptr (struct dcons_state *dc) { 324 int dlen, i; 325 u_int32_t ptr[DCONS_NPORT*2+1]; 326 static int retry = RETRY; 327 328 again: 329 dlen = dread(dc, &ptr, sizeof(ptr), 330 dc->paddr + __offsetof(struct dcons_buf, magic)); 331 332 if (dlen < 0) { 333 if (errno == ETIMEDOUT) 334 if (retry -- > 0) 335 goto again; 336 dconschat_ready(dc, 0, "get ptr failed"); 337 return(-1); 338 } 339 if (ptr[0] != htonl(DCONS_MAGIC)) { 340 dconschat_ready(dc, 0, "wrong magic"); 341 return(-1); 342 } 343 retry = RETRY; 344 for (i = 0; i < DCONS_NPORT; i ++) { 345 dc->port[i].optr = ntohl(ptr[i + 1]); 346 dc->port[i].iptr = ntohl(ptr[DCONS_NPORT + i + 1]); 347 } 348 return(0); 349 } 350 351 #define MAX_XFER 2048 352 static int 353 dconschat_read_dcons(struct dcons_state *dc, int port, char *buf, int len) 354 { 355 struct dcons_ch *ch; 356 u_int32_t ptr, pos, gen, next_gen; 357 int rlen, dlen, lost; 358 int retry = RETRY; 359 360 ch = &dc->port[port].o; 361 ptr = dc->port[port].optr; 362 gen = ptr >> DCONS_GEN_SHIFT; 363 pos = ptr & DCONS_POS_MASK; 364 if (gen == ch->gen && pos == ch->pos) 365 return (-1); 366 367 next_gen = DCONS_NEXT_GEN(ch->gen); 368 /* XXX sanity check */ 369 if (gen == ch->gen) { 370 if (pos > ch->pos) 371 goto ok; 372 lost = ch->size * DCONS_GEN_MASK - ch->pos; 373 ch->pos = 0; 374 } else if (gen == next_gen) { 375 if (pos <= ch->pos) 376 goto ok; 377 lost = pos - ch->pos; 378 ch->pos = pos; 379 } else { 380 lost = gen - ch->gen; 381 if (lost < 0) 382 lost += DCONS_GEN_MASK; 383 if (verbose) 384 printf("[genskip %d]", lost); 385 lost = lost * ch->size - ch->pos; 386 ch->pos = 0; 387 ch->gen = gen; 388 } 389 /* generation skipped !! */ 390 /* XXX discard */ 391 if (verbose) 392 printf("[lost %d]", lost); 393 ok: 394 if (gen == ch->gen) 395 rlen = pos - ch->pos; 396 else 397 rlen = ch->size - ch->pos; 398 399 if (rlen > MAX_XFER) 400 rlen = MAX_XFER; 401 if (rlen > len) 402 rlen = len; 403 404 #if 1 405 if (verbose) { 406 printf("[%d]", rlen); 407 fflush(stdout); 408 } 409 #endif 410 411 again: 412 dlen = dread(dc, buf, rlen, ch->buf + ch->pos); 413 if (dlen < 0) { 414 if (errno == ETIMEDOUT) 415 if (retry -- > 0) 416 goto again; 417 dconschat_ready(dc, 0, "read buffer failed"); 418 return(-1); 419 } 420 if (dlen != rlen) 421 warnx("dlen(%d) != rlen(%d)\n", dlen, rlen); 422 ch->pos += dlen; 423 if (ch->pos >= ch->size) { 424 ch->gen = next_gen; 425 ch->pos = 0; 426 if (verbose) 427 printf("read_dcons: gen=%d", ch->gen); 428 } 429 return (dlen); 430 } 431 432 static int 433 dconschat_write_dcons(struct dcons_state *dc, int port, char *buf, int blen) 434 { 435 struct dcons_ch *ch; 436 u_int32_t ptr; 437 int len, wlen; 438 int retry = RETRY; 439 440 ch = &dc->port[port].i; 441 ptr = dc->port[port].iptr; 442 443 /* the others may advance the pointer sync with it */ 444 ch->gen = ptr >> DCONS_GEN_SHIFT; 445 ch->pos = ptr & DCONS_POS_MASK; 446 447 while(blen > 0) { 448 wlen = MIN(blen, (int)(ch->size - ch->pos)); 449 wlen = MIN(wlen, MAX_XFER); 450 len = dwrite(dc, buf, wlen, ch->buf + ch->pos); 451 if (len < 0) { 452 if (errno == ETIMEDOUT) 453 if (retry -- > 0) 454 continue; /* try again */ 455 dconschat_ready(dc, 0, "write buffer failed"); 456 return(-1); 457 } 458 ch->pos += len; 459 buf += len; 460 blen -= len; 461 if (ch->pos >= ch->size) { 462 ch->gen = DCONS_NEXT_GEN(ch->gen); 463 ch->pos = 0; 464 if (verbose) 465 printf("write_dcons: gen=%d", ch->gen); 466 467 } 468 } 469 470 ptr = DCONS_MAKE_PTR(ch); 471 dc->port[port].iptr = ptr; 472 473 if (verbose > 2) 474 printf("(iptr: 0x%x)", ptr); 475 again: 476 len = dwrite(dc, &ptr, sizeof(u_int32_t), 477 dc->paddr + __offsetof(struct dcons_buf, iptr[port])); 478 if (len < 0) { 479 if (errno == ETIMEDOUT) 480 if (retry -- > 0) 481 goto again; 482 dconschat_ready(dc, 0, "write ptr failed"); 483 return(-1); 484 } 485 return(0); 486 } 487 488 static int 489 dconschat_write_socket(int fd, char *buf, int len) 490 { 491 write(fd, buf, len); 492 if (verbose > 1) { 493 buf[len] = 0; 494 printf("[%s]", buf); 495 } 496 return (0); 497 } 498 499 static void 500 dconschat_init_socket(struct dcons_state *dc, int port, char *host, int sport) 501 { 502 struct addrinfo hints, *res; 503 int on = 1, error; 504 char service[10]; 505 struct kevent kev; 506 struct dcons_port *p; 507 508 p = &dc->port[port]; 509 p->port = port; 510 p->infd = p->outfd = -1; 511 512 if (sport < 0) 513 return; 514 515 if (sport == 0) { 516 517 /* Use stdin and stdout */ 518 p->infd = STDIN_FILENO; 519 p->outfd = STDOUT_FILENO; 520 p->s = -1; 521 if (tc_set == 0 && 522 tcgetattr(STDIN_FILENO, &dc->tsave) == 0) { 523 struct termios traw; 524 525 traw = dc->tsave; 526 cfmakeraw(&traw); 527 tcsetattr(STDIN_FILENO, TCSADRAIN, &traw); 528 tc_set = 1; 529 } 530 EV_SET(&kev, p->infd, EVFILT_READ, EV_ADD, NOTE_LOWAT, 1, 531 (void *)p); 532 kevent(dc->kq, &kev, 1, NULL, 0, &dc->zero); 533 return; 534 } 535 536 memset(&hints, 0, sizeof(hints)); 537 hints.ai_flags = AI_PASSIVE; 538 #if 1 /* gdb can talk v4 only */ 539 hints.ai_family = PF_INET; 540 #else 541 hints.ai_family = PF_UNSPEC; 542 #endif 543 hints.ai_socktype = SOCK_STREAM; 544 hints.ai_protocol = 0; 545 546 if (verbose) 547 printf("%s:%d for port %d\n", 548 host == NULL ? "*" : host, sport, port); 549 snprintf(service, sizeof(service), "%d", sport); 550 error = getaddrinfo(host, service, &hints, &res); 551 if (error) 552 errx(1, "tcp/%s: %s\n", service, gai_strerror(error)); 553 p->res = res; 554 p->s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 555 if (p->s < 0) 556 err(1, "socket"); 557 setsockopt(p->s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); 558 559 if (bind(p->s, p->res->ai_addr, p->res->ai_addrlen) < 0) { 560 err(1, "bind"); 561 } 562 if (listen(p->s, 1) < 0) 563 err(1, "listen"); 564 EV_SET(&kev, p->s, EVFILT_READ, EV_ADD | EV_ONESHOT, 0, 0, (void *)p); 565 error = kevent(dc->kq, &kev, 1, NULL, 0, &dc->to); 566 if (error < 0) 567 err(1, "kevent"); 568 return; 569 } 570 571 static int 572 dconschat_accept_socket(struct dcons_state *dc, struct dcons_port *p) 573 { 574 int foo, ns, flags; 575 struct kevent kev; 576 577 /* accept connection */ 578 foo = p->res->ai_addrlen; 579 ns = accept(p->s, p->res->ai_addr, &foo); 580 if (ns < 0) 581 err(1, "accept"); 582 if (verbose) 583 printf("port%d accepted\n", p->port); 584 585 flags = fcntl(ns, F_GETFL, 0); 586 flags |= O_NDELAY; 587 fcntl(ns, F_SETFL, flags); 588 #if 1 589 if (IS_CONSOLE(p) && (dc->flags & F_TELNET) != 0) { 590 char sga[] = {IAC, WILL, TELOPT_SGA}; 591 char linemode[] = {IAC, DONT, TELOPT_LINEMODE}; 592 char echo[] = {IAC, WILL, TELOPT_ECHO}; 593 char bin[] = {IAC, DO, TELOPT_BINARY}; 594 595 write(ns, sga, sizeof(sga)); 596 write(ns, linemode, sizeof(linemode)); 597 write(ns, echo, sizeof(echo)); 598 write(ns, bin, sizeof(bin)); 599 p->skip_read = 0; 600 } 601 #endif 602 603 p->infd = p->outfd = ns; 604 EV_SET(&kev, ns, EVFILT_READ, EV_ADD, NOTE_LOWAT, 1, (void *)p); 605 kevent(dc->kq, &kev, 1, NULL, 0, &dc->zero); 606 return(0); 607 } 608 609 static int 610 dconschat_read_filter(struct dcons_state *dc, struct dcons_port *p, 611 u_char *sp, int slen, u_char *dp, int *dlen) 612 { 613 static u_char abreak[3] = {13 /* CR */, 126 /* ~ */, 2 /* ^B */}; 614 615 while (slen > 0) { 616 if (IS_CONSOLE(p)) { 617 if ((dc->flags & F_TELNET) != 0) { 618 /* XXX Telent workarounds */ 619 if (p->skip_read -- > 0) { 620 sp ++; 621 slen --; 622 continue; 623 } 624 if (*sp == IAC) { 625 if (verbose) 626 printf("(IAC)"); 627 p->skip_read = 2; 628 sp ++; 629 slen --; 630 continue; 631 } 632 if (*sp == 0) { 633 if (verbose) 634 printf("(0 stripped)"); 635 sp ++; 636 slen --; 637 continue; 638 } 639 } 640 switch (dc->escape_state) { 641 case STATE1: 642 if (*sp == KEY_TILDE) 643 dc->escape_state = STATE2; 644 else 645 dc->escape_state = STATE0; 646 break; 647 case STATE2: 648 dc->escape_state = STATE0; 649 if (*sp == '.') 650 dconschat_cleanup(0); 651 } 652 if (*sp == KEY_CR) 653 dc->escape_state = STATE1; 654 } else if (IS_GDB(p)) { 655 /* GDB: ^C -> CR+~+^B */ 656 if (*sp == 0x3 && (dc->flags & F_ALT_BREAK) != 0) { 657 bcopy(abreak, dp, 3); 658 dp += 3; 659 sp ++; 660 *dlen += 3; 661 /* discard rest of the packet */ 662 slen = 0; 663 break; 664 } 665 } 666 *dp++ = *sp++; 667 (*dlen) ++; 668 slen --; 669 } 670 return (*dlen); 671 672 } 673 674 static int 675 dconschat_read_socket(struct dcons_state *dc, struct dcons_port *p) 676 { 677 struct kevent kev; 678 int len, wlen; 679 char rbuf[MAX_XFER], wbuf[MAX_XFER+2]; 680 681 if ((len = read(p->infd, rbuf, sizeof(rbuf))) > 0) { 682 wlen = 0; 683 dconschat_read_filter(dc, p, rbuf, len, wbuf, &wlen); 684 /* XXX discard if not ready*/ 685 if (wlen > 0 && (dc->flags & F_READY) != 0) { 686 dconschat_write_dcons(dc, p->port, wbuf, wlen); 687 if (verbose > 1) { 688 wbuf[wlen] = 0; 689 printf("(%s)\n", wbuf); 690 } 691 if (verbose) { 692 printf("(%d)", wlen); 693 fflush(stdout); 694 } 695 } 696 } else { 697 if (verbose) { 698 if (len == 0) 699 warnx("port%d: closed", p->port); 700 else 701 warn("port%d: read", p->port); 702 } 703 EV_SET(&kev, p->infd, EVFILT_READ, 704 EV_DELETE, 0, 0, NULL); 705 kevent(dc->kq, &kev, 1, NULL, 0, &dc->zero); 706 close(p->infd); 707 close(p->outfd); 708 /* XXX exit for pipe case XXX */ 709 EV_SET(&kev, p->s, EVFILT_READ, 710 EV_ADD | EV_ONESHOT, 0, 0, (void *) p); 711 kevent(dc->kq, &kev, 1, NULL, 0, &dc->zero); 712 p->infd = p->outfd = -1; 713 } 714 return(0); 715 } 716 #define NEVENT 5 717 static int 718 dconschat_proc_socket(struct dcons_state *dc) 719 { 720 struct kevent elist[NEVENT], *e; 721 int i, n; 722 struct dcons_port *p; 723 724 n = kevent(dc->kq, NULL, 0, elist, NEVENT, &dc->to); 725 for (i = 0; i < n; i ++) { 726 e = &elist[i]; 727 p = (struct dcons_port *)e->udata; 728 if (e->ident == (uintptr_t)p->s) { 729 dconschat_accept_socket(dc, p); 730 } else { 731 dconschat_read_socket(dc, p); 732 } 733 } 734 return(0); 735 } 736 737 static int 738 dconschat_proc_dcons(struct dcons_state *dc) 739 { 740 int port, len, error; 741 char buf[MAX_XFER]; 742 struct dcons_port *p; 743 744 error = dconschat_get_ptr(dc); 745 if (error) { 746 /* XXX we should stop write operation too. */ 747 return error; 748 } 749 for (port = 0; port < DCONS_NPORT; port ++) { 750 p = &dc->port[port]; 751 if (p->infd < 0) 752 continue; 753 while ((len = dconschat_read_dcons(dc, port, buf, 754 sizeof(buf))) > 0) { 755 dconschat_write_socket(p->outfd, buf, len); 756 dconschat_get_ptr(dc); 757 } 758 if ((dc->flags & F_ONE_SHOT) != 0 && len <= 0) 759 dconschat_cleanup(0); 760 } 761 return 0; 762 } 763 764 static int 765 dconschat_start_session(struct dcons_state *dc) 766 { 767 int counter = 0; 768 769 while (1) { 770 if ((dc->flags & F_READY) == 0 && 771 (++counter % (poll_hz * DCONS_POLL_OFFLINE)) == 0) 772 dconschat_fetch_header(dc); 773 if ((dc->flags & F_READY) != 0) 774 dconschat_proc_dcons(dc); 775 dconschat_proc_socket(dc); 776 } 777 return (0); 778 } 779 780 static void 781 usage(void) 782 { 783 fprintf(stderr, 784 "usage: dconschat [-brvwRT1] [-h hz] [-C port] [-G port]\n" 785 "\t\t\t[-M core] [-N system]\n" 786 "\t\t\t[-u unit] [-a address] [-t target_eui64]\n" 787 "\t-b translate ctrl-C to CR+~+ctrl-B on gdb port\n" 788 "\t-v verbose\n" 789 "\t-w listen on wildcard address rather than localhost\n" 790 "\t-r replay old buffer on connection\n" 791 "\t-R read-only\n" 792 "\t-T enable Telnet protocol workaround on console port\n" 793 "\t-1 one shot: read buffer and exit\n" 794 "\t-h polling rate\n" 795 "\t-C port number for console port\n" 796 "\t-G port number for gdb port\n" 797 "\t(for KVM)\n" 798 "\t-M core file\n" 799 "\t-N system file\n" 800 "\t(for FireWire)\n" 801 "\t-u specify unit number of the bus\n" 802 "\t-t EUI64 of target host (must be specified)\n" 803 "\t-a physical address of dcons buffer on target host\n" 804 ); 805 exit(0); 806 } 807 int 808 main(int argc, char **argv) 809 { 810 struct dcons_state *dc; 811 struct fw_eui64 eui; 812 struct eui64 target; 813 char devicename[256], *core = NULL, *sysfile = NULL; 814 int i, ch, error; 815 int unit=0, wildcard=0; 816 int port[DCONS_NPORT]; 817 818 bzero(&sc, sizeof(sc)); 819 dc = ≻ 820 dc->flags |= USE_CROM ? F_USE_CROM : 0; 821 822 /* defualt ports */ 823 port[0] = 0; /* stdin/out for console */ 824 port[1] = -1; /* disable gdb port */ 825 826 while ((ch = getopt(argc, argv, "a:bh:rt:u:vwC:G:M:N:RT1")) != -1) { 827 switch(ch) { 828 case 'a': 829 dc->paddr = strtoull(optarg, NULL, 0); 830 dc->flags &= ~F_USE_CROM; 831 break; 832 case 'b': 833 dc->flags |= F_ALT_BREAK; 834 break; 835 case 'h': 836 poll_hz = strtoul(optarg, NULL, 0); 837 if (poll_hz == 0) 838 poll_hz = DCONS_POLL_HZ; 839 break; 840 case 'r': 841 dc->flags |= F_REPLAY; 842 break; 843 case 't': 844 if (eui64_hostton(optarg, &target) != 0 && 845 eui64_aton(optarg, &target) != 0) 846 errx(1, "invalid target: %s", optarg); 847 eui.hi = ntohl(*(u_int32_t*)&(target.octet[0])); 848 eui.lo = ntohl(*(u_int32_t*)&(target.octet[4])); 849 dc->type = TYPE_FW; 850 break; 851 case 'u': 852 unit = strtol(optarg, NULL, 0); 853 break; 854 case 'v': 855 verbose ++; 856 break; 857 case 'w': 858 wildcard = 1; 859 break; 860 case 'C': 861 port[0] = strtol(optarg, NULL, 0); 862 break; 863 case 'G': 864 port[1] = strtol(optarg, NULL, 0); 865 break; 866 case 'M': 867 core = optarg; 868 break; 869 case 'N': 870 sysfile = optarg; 871 break; 872 case 'R': 873 dc->flags |= F_RD_ONLY; 874 break; 875 case 'T': 876 dc->flags |= F_TELNET; 877 break; 878 case '1': 879 dc->flags |= F_ONE_SHOT | F_REPLAY; 880 break; 881 default: 882 usage(); 883 } 884 } 885 if (dc->paddr == 0 && (dc->flags & F_USE_CROM) == 0) { 886 warnx("no address specified"); 887 usage(); 888 } 889 890 if (port[0] < 0 && port[1] < 0) { 891 warnx("no port specified"); 892 usage(); 893 } 894 895 /* set signal handler */ 896 signal(SIGHUP, dconschat_cleanup); 897 signal(SIGINT, dconschat_cleanup); 898 signal(SIGPIPE, dconschat_cleanup); 899 signal(SIGTERM, dconschat_cleanup); 900 901 /* init firewire */ 902 switch (dc->type) { 903 case TYPE_FW: 904 #define MAXDEV 10 905 for (i = 0; i < MAXDEV; i ++) { 906 snprintf(devicename, sizeof(devicename), 907 "/dev/fwmem%d.%d", unit, i); 908 dc->fd = open(devicename, O_RDWR); 909 if (dc->fd >= 0) 910 goto found; 911 } 912 err(1, "open"); 913 found: 914 error = ioctl(dc->fd, FW_SDEUI64, &eui); 915 if (error) 916 err(1, "ioctl"); 917 break; 918 case TYPE_KVM: 919 { 920 struct nlist nl[] = {{.n_name = "dcons_buf"}, {.n_name = ""}}; 921 void *dcons_buf; 922 923 dc->kd = kvm_open(sysfile, core, NULL, 924 (dc->flags & F_RD_ONLY) ? O_RDONLY : O_RDWR, "dconschat"); 925 if (dc->kd == NULL) 926 errx(1, "kvm_open"); 927 928 if (kvm_nlist(dc->kd, nl) < 0) 929 errx(1, "kvm_nlist: %s", kvm_geterr(dc->kd)); 930 931 if (kvm_read(dc->kd, nl[0].n_value, &dcons_buf, 932 sizeof(void *)) < 0) 933 errx(1, "kvm_read: %s", kvm_geterr(dc->kd)); 934 dc->paddr = (uintptr_t)dcons_buf; 935 if (verbose) 936 printf("dcons_buf: 0x%x\n", (uint)dc->paddr); 937 break; 938 } 939 } 940 dconschat_fetch_header(dc); 941 942 /* iniit sockets */ 943 dc->kq = kqueue(); 944 if (poll_hz == 1) { 945 dc->to.tv_sec = 1; 946 dc->to.tv_nsec = 0; 947 } else { 948 dc->to.tv_sec = 0; 949 dc->to.tv_nsec = 1000 * 1000 * 1000 / poll_hz; 950 } 951 dc->zero.tv_sec = 0; 952 dc->zero.tv_nsec = 0; 953 for (i = 0; i < DCONS_NPORT; i++) 954 dconschat_init_socket(dc, i, 955 wildcard ? NULL : __DECONST(char *, "localhost"), port[i]); 956 957 dconschat_start_session(dc); 958 959 for (i = 0; i < DCONS_NPORT; i++) { 960 freeaddrinfo(dc->port[i].res); 961 } 962 return (0); 963 } 964