1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (C) 2003 5 * Hidetoshi Shimokawa. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * 18 * This product includes software developed by Hidetoshi Shimokawa. 19 * 20 * 4. Neither the name of the author nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $Id: dconschat.c,v 1.76 2003/10/23 06:21:13 simokawa Exp $ 37 * $FreeBSD$ 38 */ 39 40 #include <sys/param.h> 41 #include <sys/types.h> 42 #include <sys/uio.h> 43 #include <sys/wait.h> 44 #include <unistd.h> 45 #include <fcntl.h> 46 #include <signal.h> 47 #include <stdint.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <termios.h> 51 #include <dev/dcons/dcons.h> 52 53 #include <sys/socket.h> 54 #include <netinet/in.h> 55 #include <netdb.h> 56 #include <err.h> 57 #include <string.h> 58 #include <sys/eui64.h> 59 #include <sys/event.h> 60 #include <sys/time.h> 61 #include <arpa/telnet.h> 62 63 #include <sys/ioccom.h> 64 #include <dev/firewire/firewire.h> 65 #include <dev/firewire/iec13213.h> 66 67 #include <kvm.h> 68 #include <nlist.h> 69 70 #include <sys/errno.h> 71 72 #define DCONS_POLL_HZ 100 73 #define DCONS_POLL_OFFLINE 2 /* sec */ 74 75 #define RETRY 3 76 77 #ifdef CSRVAL_VENDOR_PRIVATE 78 #define USE_CROM 1 79 #else 80 #define USE_CROM 0 81 #endif 82 83 int verbose = 0; 84 int tc_set = 0; 85 int poll_hz = DCONS_POLL_HZ; 86 static u_char abreak[3] = {13 /* CR */, 126 /* ~ */, 2 /* ^B */}; 87 88 #define IS_CONSOLE(p) ((p)->port == DCONS_CON) 89 #define IS_GDB(p) ((p)->port == DCONS_GDB) 90 91 static struct dcons_state { 92 int fd; 93 kvm_t *kd; 94 int kq; 95 off_t paddr; 96 off_t reset; 97 #define F_READY (1 << 1) 98 #define F_RD_ONLY (1 << 2) 99 #define F_ALT_BREAK (1 << 3) 100 #define F_TELNET (1 << 4) 101 #define F_USE_CROM (1 << 5) 102 #define F_ONE_SHOT (1 << 6) 103 #define F_REPLAY (1 << 7) 104 int flags; 105 enum { 106 TYPE_KVM, 107 TYPE_FW 108 } type; 109 int escape_state; 110 struct dcons_port { 111 int port; 112 int sport; 113 struct dcons_ch o; 114 struct dcons_ch i; 115 u_int32_t optr; 116 u_int32_t iptr; 117 int s; 118 int infd; 119 int outfd; 120 struct addrinfo *res; 121 int skip_read; 122 } port[DCONS_NPORT]; 123 struct timespec to; 124 struct timespec zero; 125 struct termios tsave; 126 struct termios traw; 127 char escape; 128 } sc; 129 130 static int dconschat_write_dcons(struct dcons_state *, int, char *, int); 131 132 static int 133 dread(struct dcons_state *dc, void *buf, size_t n, off_t offset) 134 { 135 switch (dc->type) { 136 case TYPE_FW: 137 return (pread(dc->fd, buf, n, offset)); 138 case TYPE_KVM: 139 return (kvm_read(dc->kd, offset, buf, n)); 140 } 141 return (-1); 142 } 143 144 static int 145 dwrite(struct dcons_state *dc, void *buf, size_t n, off_t offset) 146 { 147 if ((dc->flags & F_RD_ONLY) != 0) 148 return (n); 149 150 switch (dc->type) { 151 case TYPE_FW: 152 return (pwrite(dc->fd, buf, n, offset)); 153 case TYPE_KVM: 154 return (kvm_write(dc->kd, offset, buf, n)); 155 } 156 return (-1); 157 } 158 159 static void 160 dconschat_reset_target(struct dcons_state *dc, struct dcons_port *p) 161 { 162 char buf[PAGE_SIZE]; 163 if (dc->reset == 0) 164 return; 165 166 snprintf(buf, PAGE_SIZE, 167 "\r\n[dconschat reset target(addr=0x%jx)...]\r\n", 168 (intmax_t)dc->reset); 169 write(p->outfd, buf, strlen(buf)); 170 bzero(&buf[0], PAGE_SIZE); 171 dwrite(dc, (void *)buf, PAGE_SIZE, dc->reset); 172 } 173 174 175 static void 176 dconschat_suspend(struct dcons_state *dc, struct dcons_port *p) 177 { 178 if (p->sport != 0) 179 return; 180 181 if (tc_set) 182 tcsetattr(STDIN_FILENO, TCSADRAIN, &dc->tsave); 183 184 printf("\n[dconschat suspend]\n"); 185 kill(getpid(), SIGTSTP); 186 187 if (tc_set) 188 tcsetattr(STDIN_FILENO, TCSADRAIN, &dc->traw); 189 } 190 191 static void 192 dconschat_sigchld(int s) 193 { 194 struct kevent kev; 195 struct dcons_port *p; 196 char buf[256]; 197 198 p = &sc.port[DCONS_CON]; 199 200 snprintf(buf, 256, "\r\n[child exit]\r\n"); 201 write(p->outfd, buf, strlen(buf)); 202 203 if (tc_set) 204 tcsetattr(STDIN_FILENO, TCSADRAIN, &sc.traw); 205 206 EV_SET(&kev, p->infd, EVFILT_READ, EV_ADD, NOTE_LOWAT, 1, (void *)p); 207 kevent(sc.kq, &kev, 1, NULL, 0, &sc.zero); 208 } 209 210 static void 211 dconschat_fork_gdb(struct dcons_state *dc, struct dcons_port *p) 212 { 213 pid_t pid; 214 char buf[256], com[256]; 215 struct kevent kev; 216 217 pid = fork(); 218 if (pid < 0) { 219 snprintf(buf, 256, "\r\n[%s: fork failed]\r\n", __FUNCTION__); 220 write(p->outfd, buf, strlen(buf)); 221 } 222 223 224 if (pid == 0) { 225 /* child */ 226 if (tc_set) 227 tcsetattr(STDIN_FILENO, TCSADRAIN, &dc->tsave); 228 229 snprintf(com, sizeof(buf), "kgdb -r :%d kernel", 230 dc->port[DCONS_GDB].sport); 231 snprintf(buf, 256, "\n[fork %s]\n", com); 232 write(p->outfd, buf, strlen(buf)); 233 234 execl("/bin/sh", "/bin/sh", "-c", com, NULL); 235 236 snprintf(buf, 256, "\n[fork failed]\n"); 237 write(p->outfd, buf, strlen(buf)); 238 239 if (tc_set) 240 tcsetattr(STDIN_FILENO, TCSADRAIN, &dc->traw); 241 242 exit(0); 243 } else { 244 signal(SIGCHLD, dconschat_sigchld); 245 EV_SET(&kev, p->infd, EVFILT_READ, EV_DELETE, 0, 0, NULL); 246 kevent(sc.kq, &kev, 1, NULL, 0, &sc.zero); 247 } 248 } 249 250 251 static void 252 dconschat_cleanup(int sig) 253 { 254 struct dcons_state *dc; 255 int status; 256 257 dc = ≻ 258 if (tc_set != 0) 259 tcsetattr(STDIN_FILENO, TCSADRAIN, &dc->tsave); 260 261 if (sig > 0) 262 printf("\n[dconschat exiting with signal %d ...]\n", sig); 263 else 264 printf("\n[dconschat exiting...]\n"); 265 wait(&status); 266 exit(0); 267 } 268 269 #if USE_CROM 270 static int 271 dconschat_get_crom(struct dcons_state *dc) 272 { 273 off_t addr; 274 int i, state = 0; 275 u_int32_t buf, hi = 0, lo = 0, reset_hi = 0, reset_lo = 0; 276 struct csrreg *reg; 277 278 reg = (struct csrreg *)&buf; 279 addr = 0xffff; 280 addr = (addr << 32) | 0xf0000400; 281 for (i = 20; i < 0x400; i += 4) { 282 if (dread(dc, &buf, 4, addr + i) < 0) { 283 if (verbose) 284 warn("crom read failed"); 285 goto out; 286 } 287 buf = ntohl(buf); 288 if (verbose) 289 printf("%d %02x %06x\n", state, reg->key, reg->val); 290 switch (state) { 291 case 0: 292 if (reg->key == CSRKEY_SPEC && 293 reg->val == CSRVAL_VENDOR_PRIVATE) 294 state = 1; 295 break; 296 case 1: 297 if (reg->key == CSRKEY_VER && 298 reg->val == DCONS_CSR_VAL_VER) 299 state = 2; 300 break; 301 case 2: 302 switch (reg->key) { 303 case DCONS_CSR_KEY_HI: 304 hi = reg->val; 305 break; 306 case DCONS_CSR_KEY_LO: 307 lo = reg->val; 308 break; 309 case DCONS_CSR_KEY_RESET_HI: 310 reset_hi = reg->val; 311 break; 312 case DCONS_CSR_KEY_RESET_LO: 313 reset_lo = reg->val; 314 goto out; 315 break; 316 case 0x81: 317 break; 318 default: 319 state = 0; 320 } 321 break; 322 } 323 } 324 out: 325 if (verbose) 326 printf("addr: %06x %06x\n", hi, lo); 327 dc->paddr = ((off_t)hi << 24) | lo; 328 dc->reset = ((off_t)reset_hi << 24) | reset_lo; 329 if (dc->paddr == 0) 330 return (-1); 331 return (0); 332 } 333 #endif 334 335 static void 336 dconschat_ready(struct dcons_state *dc, int ready, char *reason) 337 { 338 static char oldreason[64] = ""; 339 int old; 340 341 old = (dc->flags & F_READY) ? 1 : 0; 342 343 if (ready) { 344 dc->flags |= F_READY; 345 if (ready != old) 346 printf("[dcons connected]\r\n"); 347 oldreason[0] = 0; 348 } else { 349 dc->flags &= ~F_READY; 350 if (strncmp(oldreason, reason, sizeof(oldreason)) != 0) { 351 printf("[dcons disconnected (%s)]\r\n", reason); 352 strlcpy(oldreason, reason, sizeof(oldreason)); 353 } 354 } 355 } 356 357 static int 358 dconschat_fetch_header(struct dcons_state *dc) 359 { 360 char ebuf[64]; 361 struct dcons_buf dbuf; 362 int j; 363 364 #if USE_CROM 365 if (dc->paddr == 0 && (dc->flags & F_USE_CROM) != 0) { 366 if (dconschat_get_crom(dc)) { 367 dconschat_ready(dc, 0, "get crom failed"); 368 return (-1); 369 } 370 } 371 #endif 372 373 if (dread(dc, &dbuf, DCONS_HEADER_SIZE, dc->paddr) < 0) { 374 dconschat_ready(dc, 0, "read header failed"); 375 return (-1); 376 } 377 if (dbuf.magic != htonl(DCONS_MAGIC)) { 378 if ((dc->flags & F_USE_CROM) !=0) 379 dc->paddr = 0; 380 snprintf(ebuf, sizeof(ebuf), "wrong magic 0x%08x", dbuf.magic); 381 dconschat_ready(dc, 0, ebuf); 382 return (-1); 383 } 384 if (ntohl(dbuf.version) != DCONS_VERSION) { 385 snprintf(ebuf, sizeof(ebuf), 386 "wrong version %d,%d", 387 ntohl(dbuf.version), DCONS_VERSION); 388 /* XXX exit? */ 389 dconschat_ready(dc, 0, ebuf); 390 return (-1); 391 } 392 393 for (j = 0; j < DCONS_NPORT; j++) { 394 struct dcons_ch *o, *i; 395 off_t newbuf; 396 int new = 0; 397 398 o = &dc->port[j].o; 399 newbuf = dc->paddr + ntohl(dbuf.ooffset[j]); 400 o->size = ntohl(dbuf.osize[j]); 401 402 if (newbuf != o->buf) { 403 /* buffer address has changes */ 404 new = 1; 405 o->gen = ntohl(dbuf.optr[j]) >> DCONS_GEN_SHIFT; 406 o->pos = ntohl(dbuf.optr[j]) & DCONS_POS_MASK; 407 o->buf = newbuf; 408 } 409 410 i = &dc->port[j].i; 411 i->size = ntohl(dbuf.isize[j]); 412 i->gen = ntohl(dbuf.iptr[j]) >> DCONS_GEN_SHIFT; 413 i->pos = ntohl(dbuf.iptr[j]) & DCONS_POS_MASK; 414 i->buf = dc->paddr + ntohl(dbuf.ioffset[j]); 415 416 if (verbose) { 417 printf("port %d size offset gen pos\n", j); 418 printf("output: %5d %6d %5d %5d\n" 419 "input : %5d %6d %5d %5d\n", 420 o->size, ntohl(dbuf.ooffset[j]), o->gen, o->pos, 421 i->size, ntohl(dbuf.ioffset[j]), i->gen, i->pos); 422 } 423 424 if (IS_CONSOLE(&dc->port[j]) && new && 425 (dc->flags & F_REPLAY) !=0) { 426 if (o->gen > 0) 427 o->gen --; 428 else 429 o->pos = 0; 430 } 431 } 432 dconschat_ready(dc, 1, NULL); 433 return(0); 434 } 435 436 static int 437 dconschat_get_ptr (struct dcons_state *dc) { 438 int dlen, i; 439 u_int32_t ptr[DCONS_NPORT*2+1]; 440 static int retry = RETRY; 441 char ebuf[64]; 442 443 again: 444 dlen = dread(dc, &ptr, sizeof(ptr), 445 dc->paddr + __offsetof(struct dcons_buf, magic)); 446 447 if (dlen < 0) { 448 if (errno == ETIMEDOUT) 449 if (retry -- > 0) 450 goto again; 451 dconschat_ready(dc, 0, "get ptr failed"); 452 return(-1); 453 } 454 if (ptr[0] != htonl(DCONS_MAGIC)) { 455 if ((dc->flags & F_USE_CROM) !=0) 456 dc->paddr = 0; 457 snprintf(ebuf, sizeof(ebuf), "wrong magic 0x%08x", ptr[0]); 458 dconschat_ready(dc, 0, ebuf); 459 return(-1); 460 } 461 retry = RETRY; 462 for (i = 0; i < DCONS_NPORT; i ++) { 463 dc->port[i].optr = ntohl(ptr[i + 1]); 464 dc->port[i].iptr = ntohl(ptr[DCONS_NPORT + i + 1]); 465 } 466 return(0); 467 } 468 469 #define MAX_XFER 2048 470 static int 471 dconschat_read_dcons(struct dcons_state *dc, int port, char *buf, int len) 472 { 473 struct dcons_ch *ch; 474 u_int32_t ptr, pos, gen, next_gen; 475 int rlen, dlen, lost; 476 int retry = RETRY; 477 478 ch = &dc->port[port].o; 479 ptr = dc->port[port].optr; 480 gen = ptr >> DCONS_GEN_SHIFT; 481 pos = ptr & DCONS_POS_MASK; 482 if (gen == ch->gen && pos == ch->pos) 483 return (-1); 484 485 next_gen = DCONS_NEXT_GEN(ch->gen); 486 /* XXX sanity check */ 487 if (gen == ch->gen) { 488 if (pos > ch->pos) 489 goto ok; 490 lost = ch->size * DCONS_GEN_MASK - ch->pos; 491 ch->pos = 0; 492 } else if (gen == next_gen) { 493 if (pos <= ch->pos) 494 goto ok; 495 lost = pos - ch->pos; 496 ch->pos = pos; 497 } else { 498 lost = gen - ch->gen; 499 if (lost < 0) 500 lost += DCONS_GEN_MASK; 501 if (verbose) 502 printf("[genskip %d]", lost); 503 lost = lost * ch->size - ch->pos; 504 ch->pos = 0; 505 ch->gen = gen; 506 } 507 /* generation skipped !! */ 508 /* XXX discard */ 509 if (verbose) 510 printf("[lost %d]", lost); 511 ok: 512 if (gen == ch->gen) 513 rlen = pos - ch->pos; 514 else 515 rlen = ch->size - ch->pos; 516 517 if (rlen > MAX_XFER) 518 rlen = MAX_XFER; 519 if (rlen > len) 520 rlen = len; 521 522 #if 1 523 if (verbose == 1) 524 printf("[%d]", rlen); fflush(stdout); 525 #endif 526 527 again: 528 dlen = dread(dc, buf, rlen, ch->buf + ch->pos); 529 if (dlen < 0) { 530 if (errno == ETIMEDOUT) 531 if (retry -- > 0) 532 goto again; 533 dconschat_ready(dc, 0, "read buffer failed"); 534 return(-1); 535 } 536 if (dlen != rlen) 537 warnx("dlen(%d) != rlen(%d)\n", dlen, rlen); 538 ch->pos += dlen; 539 if (ch->pos >= ch->size) { 540 ch->gen = next_gen; 541 ch->pos = 0; 542 if (verbose) 543 printf("read_dcons: gen=%d", ch->gen); 544 } 545 return (dlen); 546 } 547 548 static int 549 dconschat_write_dcons(struct dcons_state *dc, int port, char *buf, int blen) 550 { 551 struct dcons_ch *ch; 552 u_int32_t ptr; 553 int len, wlen; 554 int retry = RETRY; 555 556 ch = &dc->port[port].i; 557 ptr = dc->port[port].iptr; 558 559 /* the others may advance the pointer sync with it */ 560 ch->gen = ptr >> DCONS_GEN_SHIFT; 561 ch->pos = ptr & DCONS_POS_MASK; 562 563 while(blen > 0) { 564 wlen = MIN(blen, ch->size - ch->pos); 565 wlen = MIN(wlen, MAX_XFER); 566 len = dwrite(dc, buf, wlen, ch->buf + ch->pos); 567 if (len < 0) { 568 if (errno == ETIMEDOUT) 569 if (retry -- > 0) 570 continue; /* try again */ 571 dconschat_ready(dc, 0, "write buffer failed"); 572 return(-1); 573 } 574 ch->pos += len; 575 buf += len; 576 blen -= len; 577 if (ch->pos >= ch->size) { 578 ch->gen = DCONS_NEXT_GEN(ch->gen); 579 ch->pos = 0; 580 if (verbose) 581 printf("write_dcons: gen=%d", ch->gen); 582 583 } 584 } 585 586 ptr = DCONS_MAKE_PTR(ch); 587 dc->port[port].iptr = ptr; 588 589 if (verbose > 2) 590 printf("(iptr: 0x%x)", ptr); 591 again: 592 len = dwrite(dc, &ptr, sizeof(u_int32_t), 593 dc->paddr + __offsetof(struct dcons_buf, iptr[port])); 594 if (len < 0) { 595 if (errno == ETIMEDOUT) 596 if (retry -- > 0) 597 goto again; 598 dconschat_ready(dc, 0, "write ptr failed"); 599 return(-1); 600 } 601 return(0); 602 } 603 604 605 static int 606 dconschat_write_socket(int fd, char *buf, int len) 607 { 608 write(fd, buf, len); 609 if (verbose > 1) { 610 buf[len] = 0; 611 printf("<- %s\n", buf); 612 } 613 return (0); 614 } 615 616 static void 617 dconschat_init_socket(struct dcons_state *dc, int port, char *host, int sport) 618 { 619 struct addrinfo hints, *res; 620 int on = 1, error; 621 char service[10]; 622 struct kevent kev; 623 struct dcons_port *p; 624 625 p = &dc->port[port]; 626 p->port = port; 627 p->sport = sport; 628 p->infd = p->outfd = -1; 629 630 if (sport < 0) 631 return; 632 633 if (sport == 0) { 634 635 /* Use stdin and stdout */ 636 p->infd = STDIN_FILENO; 637 p->outfd = STDOUT_FILENO; 638 p->s = -1; 639 if (tc_set == 0 && 640 tcgetattr(STDIN_FILENO, &dc->tsave) == 0) { 641 dc->traw = dc->tsave; 642 cfmakeraw(&dc->traw); 643 tcsetattr(STDIN_FILENO, TCSADRAIN, &dc->traw); 644 tc_set = 1; 645 } 646 EV_SET(&kev, p->infd, EVFILT_READ, EV_ADD, NOTE_LOWAT, 1, 647 (void *)p); 648 kevent(dc->kq, &kev, 1, NULL, 0, &dc->zero); 649 return; 650 } 651 652 memset(&hints, 0, sizeof(hints)); 653 hints.ai_flags = AI_PASSIVE; 654 #if 1 /* gdb can talk v4 only */ 655 hints.ai_family = PF_INET; 656 #else 657 hints.ai_family = PF_UNSPEC; 658 #endif 659 hints.ai_socktype = SOCK_STREAM; 660 hints.ai_protocol = 0; 661 662 if (verbose) 663 printf("%s:%d for port %d\n", 664 host == NULL ? "*" : host, sport, port); 665 snprintf(service, sizeof(service), "%d", sport); 666 error = getaddrinfo(host, service, &hints, &res); 667 if (error) 668 errx(1, "tcp/%s: %s\n", service, gai_strerror(error)); 669 p->res = res; 670 p->s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 671 if (p->s < 0) 672 err(1, "socket"); 673 setsockopt(p->s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); 674 675 if (bind(p->s, p->res->ai_addr, p->res->ai_addrlen) < 0) { 676 err(1, "bind"); 677 } 678 if (listen(p->s, 1) < 0) 679 err(1, "listen"); 680 EV_SET(&kev, p->s, EVFILT_READ, EV_ADD | EV_ONESHOT, 0, 0, (void *)p); 681 error = kevent(dc->kq, &kev, 1, NULL, 0, &dc->to); 682 if (error < 0) 683 err(1, "kevent"); 684 } 685 686 static int 687 dconschat_accept_socket(struct dcons_state *dc, struct dcons_port *p) 688 { 689 socklen_t addrlen; 690 int ns, flags; 691 struct kevent kev; 692 693 /* accept connection */ 694 addrlen = p->res->ai_addrlen; 695 ns = accept(p->s, p->res->ai_addr, &addrlen); 696 if (ns < 0) 697 err(1, "accept"); 698 if (verbose) 699 printf("port%d accepted\n", p->port); 700 701 flags = fcntl(ns, F_GETFL, 0); 702 flags |= O_NDELAY; 703 fcntl(ns, F_SETFL, flags); 704 #if 1 705 if (IS_CONSOLE(p) && (dc->flags & F_TELNET) != 0) { 706 char sga[] = {IAC, WILL, TELOPT_SGA}; 707 char linemode[] = {IAC, DONT, TELOPT_LINEMODE}; 708 char echo[] = {IAC, WILL, TELOPT_ECHO}; 709 char bin[] = {IAC, DO, TELOPT_BINARY}; 710 711 write(ns, sga, sizeof(sga)); 712 write(ns, linemode, sizeof(linemode)); 713 write(ns, echo, sizeof(echo)); 714 write(ns, bin, sizeof(bin)); 715 p->skip_read = 0; 716 } 717 #endif 718 /* discard backlog on GDB port */ 719 if (IS_GDB(p)) { 720 char buf[2048]; 721 int len; 722 723 while ((len = dconschat_read_dcons(dc, DCONS_GDB, &buf[0], 724 2048)) > 0) 725 if (verbose) 726 printf("discard %d chars on GDB port\n", len); 727 } 728 729 p->infd = p->outfd = ns; 730 EV_SET(&kev, ns, EVFILT_READ, EV_ADD, NOTE_LOWAT, 1, (void *)p); 731 kevent(dc->kq, &kev, 1, NULL, 0, &dc->zero); 732 return(0); 733 } 734 735 static int 736 dconschat_read_filter(struct dcons_state *dc, struct dcons_port *p, 737 u_char *sp, int slen, u_char *dp, int *dlen) 738 { 739 int skip; 740 char *buf; 741 742 while (slen > 0) { 743 skip = 0; 744 if (IS_CONSOLE(p)) { 745 if ((dc->flags & F_TELNET) != 0) { 746 /* XXX Telnet workarounds */ 747 if (p->skip_read -- > 0) { 748 sp ++; 749 slen --; 750 continue; 751 } 752 if (*sp == IAC) { 753 if (verbose) 754 printf("(IAC)"); 755 p->skip_read = 2; 756 sp ++; 757 slen --; 758 continue; 759 } 760 if (*sp == 0) { 761 if (verbose) 762 printf("(0 stripped)"); 763 sp ++; 764 slen --; 765 continue; 766 } 767 } 768 switch (dc->escape_state) { 769 case STATE1: 770 if (*sp == dc->escape) { 771 skip = 1; 772 dc->escape_state = STATE2; 773 } else 774 dc->escape_state = STATE0; 775 break; 776 case STATE2: 777 dc->escape_state = STATE0; 778 skip = 1; 779 if (*sp == '.') 780 dconschat_cleanup(0); 781 else if (*sp == CTRL('B')) { 782 bcopy(abreak, dp, 3); 783 dp += 3; 784 *dlen += 3; 785 } 786 else if (*sp == CTRL('G')) 787 dconschat_fork_gdb(dc, p); 788 else if ((*sp == CTRL('R')) 789 && (dc->reset != 0)) { 790 dc->escape_state = STATE3; 791 buf = "\r\n[Are you sure to reset target? (y/N)]"; 792 write(p->outfd, buf, strlen(buf)); 793 } else if (*sp == CTRL('Z')) 794 dconschat_suspend(dc, p); 795 else { 796 skip = 0; 797 *dp++ = dc->escape; 798 (*dlen) ++; 799 } 800 break; 801 case STATE3: 802 dc->escape_state = STATE0; 803 skip = 1; 804 if (*sp == 'y') 805 dconschat_reset_target(dc, p); 806 else { 807 write(p->outfd, sp, 1); 808 write(p->outfd, "\r\n", 2); 809 } 810 break; 811 } 812 if (*sp == KEY_CR) 813 dc->escape_state = STATE1; 814 } else if (IS_GDB(p)) { 815 /* GDB: ^C -> CR+~+^B */ 816 if (*sp == CTRL('C') && (dc->flags & F_ALT_BREAK) != 0) { 817 bcopy(abreak, dp, 3); 818 dp += 3; 819 sp ++; 820 *dlen += 3; 821 /* discard rest of the packet */ 822 slen = 0; 823 break; 824 } 825 } 826 if (!skip) { 827 *dp++ = *sp; 828 (*dlen) ++; 829 } 830 sp ++; 831 slen --; 832 } 833 return (*dlen); 834 835 } 836 837 static int 838 dconschat_read_socket(struct dcons_state *dc, struct dcons_port *p) 839 { 840 struct kevent kev; 841 int len, wlen; 842 char rbuf[MAX_XFER], wbuf[MAX_XFER+2]; 843 844 if ((len = read(p->infd, rbuf, sizeof(rbuf))) > 0) { 845 wlen = 0; 846 dconschat_read_filter(dc, p, rbuf, len, wbuf, &wlen); 847 /* XXX discard if not ready*/ 848 if (wlen > 0 && (dc->flags & F_READY) != 0) { 849 dconschat_write_dcons(dc, p->port, wbuf, wlen); 850 if (verbose > 1) { 851 wbuf[wlen] = 0; 852 printf("-> %s\n", wbuf); 853 } else if (verbose == 1) { 854 printf("(%d)", wlen); 855 fflush(stdout); 856 } 857 } 858 } else { 859 if (verbose) { 860 if (len == 0) 861 warnx("port%d: closed", p->port); 862 else 863 warn("port%d: read", p->port); 864 } 865 EV_SET(&kev, p->infd, EVFILT_READ, 866 EV_DELETE, 0, 0, NULL); 867 kevent(dc->kq, &kev, 1, NULL, 0, &dc->zero); 868 close(p->infd); 869 close(p->outfd); 870 /* XXX exit for pipe case XXX */ 871 EV_SET(&kev, p->s, EVFILT_READ, 872 EV_ADD | EV_ONESHOT, 0, 0, (void *) p); 873 kevent(dc->kq, &kev, 1, NULL, 0, &dc->zero); 874 p->infd = p->outfd = -1; 875 } 876 return(0); 877 } 878 #define NEVENT 5 879 static int 880 dconschat_proc_socket(struct dcons_state *dc) 881 { 882 struct kevent elist[NEVENT], *e; 883 int i, n; 884 struct dcons_port *p; 885 886 n = kevent(dc->kq, NULL, 0, elist, NEVENT, &dc->to); 887 for (i = 0; i < n; i ++) { 888 e = &elist[i]; 889 p = (struct dcons_port *)e->udata; 890 if (e->ident == p->s) { 891 dconschat_accept_socket(dc, p); 892 } else { 893 dconschat_read_socket(dc, p); 894 } 895 } 896 return(0); 897 } 898 899 static int 900 dconschat_proc_dcons(struct dcons_state *dc) 901 { 902 int port, len, err; 903 char buf[MAX_XFER]; 904 struct dcons_port *p; 905 906 err = dconschat_get_ptr(dc); 907 if (err) { 908 /* XXX we should stop write operation too. */ 909 return err; 910 } 911 for (port = 0; port < DCONS_NPORT; port ++) { 912 p = &dc->port[port]; 913 if (p->infd < 0) 914 continue; 915 while ((len = dconschat_read_dcons(dc, port, buf, 916 sizeof(buf))) > 0) { 917 dconschat_write_socket(p->outfd, buf, len); 918 if ((err = dconschat_get_ptr(dc))) 919 return (err); 920 } 921 if ((dc->flags & F_ONE_SHOT) != 0 && len <= 0) 922 dconschat_cleanup(0); 923 } 924 return 0; 925 } 926 927 static int 928 dconschat_start_session(struct dcons_state *dc) 929 { 930 int counter = 0; 931 int retry = 0; 932 int retry_unit_init = MAX(1, poll_hz / 10); 933 int retry_unit_offline = poll_hz * DCONS_POLL_OFFLINE; 934 int retry_unit = retry_unit_init; 935 int retry_max = retry_unit_offline / retry_unit; 936 937 while (1) { 938 if (((dc->flags & F_READY) == 0) && ++counter > retry_unit) { 939 counter = 0; 940 retry ++; 941 if (retry > retry_max) 942 retry_unit = retry_unit_offline; 943 if (verbose) { 944 printf("%d/%d ", retry, retry_max); 945 fflush(stdout); 946 } 947 dconschat_fetch_header(dc); 948 } 949 if ((dc->flags & F_READY) != 0) { 950 counter = 0; 951 retry = 0; 952 retry_unit = retry_unit_init; 953 dconschat_proc_dcons(dc); 954 } 955 dconschat_proc_socket(dc); 956 } 957 return (0); 958 } 959 960 static void 961 usage(void) 962 { 963 fprintf(stderr, 964 "usage: dconschat [-brvwRT1] [-h hz] [-C port] [-G port]\n" 965 "\t\t\t[-M core] [-N system]\n" 966 "\t\t\t[-u unit] [-a address] [-t target_eui64]\n" 967 "\t-b translate ctrl-C to CR+~+ctrl-B on gdb port\n" 968 "\t-v verbose\n" 969 "\t-w listen on wildcard address rather than localhost\n" 970 "\t-r replay old buffer on connection\n" 971 "\t-R read-only\n" 972 "\t-T enable Telnet protocol workaround on console port\n" 973 "\t-1 one shot: read buffer and exit\n" 974 "\t-h polling rate\n" 975 "\t-C port number for console port\n" 976 "\t-G port number for gdb port\n" 977 "\t(for KVM)\n" 978 "\t-M core file\n" 979 "\t-N system file\n" 980 "\t(for FireWire)\n" 981 "\t-u specify unit number of the bus\n" 982 "\t-t EUI64 of target host (must be specified)\n" 983 "\t-a physical address of dcons buffer on target host\n" 984 ); 985 exit(0); 986 } 987 int 988 main(int argc, char **argv) 989 { 990 struct dcons_state *dc; 991 struct fw_eui64 eui; 992 struct eui64 target; 993 char devname[256], *core = NULL, *system = NULL; 994 int i, ch, error; 995 int unit=0, wildcard=0; 996 int port[DCONS_NPORT]; 997 998 bzero(&sc, sizeof(sc)); 999 dc = ≻ 1000 dc->flags |= USE_CROM ? F_USE_CROM : 0; 1001 1002 /* default ports */ 1003 port[0] = 0; /* stdin/out for console */ 1004 port[1] = -1; /* disable gdb port */ 1005 1006 /* default escape char */ 1007 dc->escape = KEY_TILDE; 1008 1009 while ((ch = getopt(argc, argv, "a:be:h:rt:u:vwC:G:M:N:RT1")) != -1) { 1010 switch(ch) { 1011 case 'a': 1012 dc->paddr = strtoull(optarg, NULL, 0); 1013 dc->flags &= ~F_USE_CROM; 1014 break; 1015 case 'b': 1016 dc->flags |= F_ALT_BREAK; 1017 break; 1018 case 'e': 1019 dc->escape = optarg[0]; 1020 break; 1021 case 'h': 1022 poll_hz = strtoul(optarg, NULL, 0); 1023 if (poll_hz == 0) 1024 poll_hz = DCONS_POLL_HZ; 1025 break; 1026 case 'r': 1027 dc->flags |= F_REPLAY; 1028 break; 1029 case 't': 1030 if (eui64_hostton(optarg, &target) != 0 && 1031 eui64_aton(optarg, &target) != 0) 1032 errx(1, "invalid target: %s", optarg); 1033 eui.hi = ntohl(*(u_int32_t*)&(target.octet[0])); 1034 eui.lo = ntohl(*(u_int32_t*)&(target.octet[4])); 1035 dc->type = TYPE_FW; 1036 break; 1037 case 'u': 1038 unit = strtol(optarg, NULL, 0); 1039 break; 1040 case 'v': 1041 verbose ++; 1042 break; 1043 case 'w': 1044 wildcard = 1; 1045 break; 1046 case 'C': 1047 port[0] = strtol(optarg, NULL, 0); 1048 break; 1049 case 'G': 1050 port[1] = strtol(optarg, NULL, 0); 1051 break; 1052 case 'M': 1053 core = optarg; 1054 break; 1055 case 'N': 1056 system = optarg; 1057 break; 1058 case 'R': 1059 dc->flags |= F_RD_ONLY; 1060 break; 1061 case 'T': 1062 dc->flags |= F_TELNET; 1063 break; 1064 case '1': 1065 dc->flags |= F_ONE_SHOT | F_REPLAY; 1066 break; 1067 default: 1068 usage(); 1069 } 1070 } 1071 if (dc->paddr == 0 && (dc->flags & F_USE_CROM) == 0) { 1072 warnx("no address specified"); 1073 usage(); 1074 } 1075 1076 if (port[0] < 0 && port[1] < 0) { 1077 warnx("no port specified"); 1078 usage(); 1079 } 1080 1081 /* set signal handler */ 1082 signal(SIGHUP, dconschat_cleanup); 1083 signal(SIGINT, dconschat_cleanup); 1084 signal(SIGPIPE, dconschat_cleanup); 1085 signal(SIGTERM, dconschat_cleanup); 1086 1087 /* init firewire */ 1088 switch (dc->type) { 1089 case TYPE_FW: 1090 #define MAXDEV 10 1091 for (i = 0; i < MAXDEV; i ++) { 1092 snprintf(devname, sizeof(devname), 1093 "/dev/fwmem%d.%d", unit, i); 1094 dc->fd = open(devname, O_RDWR); 1095 if (dc->fd >= 0) 1096 goto found; 1097 } 1098 err(1, "open"); 1099 found: 1100 error = ioctl(dc->fd, FW_SDEUI64, &eui); 1101 if (error) 1102 err(1, "ioctl"); 1103 break; 1104 case TYPE_KVM: 1105 { 1106 struct nlist nl[] = {{"dcons_buf"}, {""}}; 1107 void *dcons_buf; 1108 1109 dc->kd = kvm_open(system, core, NULL, 1110 (dc->flags & F_RD_ONLY) ? O_RDONLY : O_RDWR, "dconschat"); 1111 if (dc->kd == NULL) 1112 errx(1, "kvm_open"); 1113 1114 if (kvm_nlist(dc->kd, nl) < 0) 1115 errx(1, "kvm_nlist: %s", kvm_geterr(dc->kd)); 1116 1117 if (kvm_read(dc->kd, nl[0].n_value, &dcons_buf, 1118 sizeof(void *)) < 0) 1119 errx(1, "kvm_read: %s", kvm_geterr(dc->kd)); 1120 dc->paddr = (uintptr_t)dcons_buf; 1121 if (verbose) 1122 printf("dcons_buf: 0x%x\n", (uint)dc->paddr); 1123 break; 1124 } 1125 } 1126 dconschat_fetch_header(dc); 1127 1128 /* init sockets */ 1129 dc->kq = kqueue(); 1130 if (poll_hz == 1) { 1131 dc->to.tv_sec = 1; 1132 dc->to.tv_nsec = 0; 1133 } else { 1134 dc->to.tv_sec = 0; 1135 dc->to.tv_nsec = 1000 * 1000 * 1000 / poll_hz; 1136 } 1137 dc->zero.tv_sec = 0; 1138 dc->zero.tv_nsec = 0; 1139 for (i = 0; i < DCONS_NPORT; i++) 1140 dconschat_init_socket(dc, i, 1141 wildcard ? NULL : "localhost", port[i]); 1142 1143 dconschat_start_session(dc); 1144 1145 for (i = 0; i < DCONS_NPORT; i++) { 1146 freeaddrinfo(dc->port[i].res); 1147 } 1148 return (0); 1149 } 1150