usr.sbin/dconschat/dconschat.c

   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 = &sc;
 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 = &sc;
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 }