1 /*- 2 * Copyright (c) 2005-2014 Sandvine Incorporated. All rights reserved. 3 * Copyright (c) 2000 Darrell Anderson 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * netdump_client.c 30 * FreeBSD subsystem supporting netdump network dumps. 31 * A dedicated server must be running to accept client dumps. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include "opt_ddb.h" 38 39 #include <sys/param.h> 40 #include <sys/conf.h> 41 #include <sys/disk.h> 42 #include <sys/endian.h> 43 #include <sys/eventhandler.h> 44 #include <sys/jail.h> 45 #include <sys/kernel.h> 46 #include <sys/kerneldump.h> 47 #include <sys/mbuf.h> 48 #include <sys/module.h> 49 #include <sys/priv.h> 50 #include <sys/proc.h> 51 #include <sys/protosw.h> 52 #include <sys/socket.h> 53 #include <sys/sysctl.h> 54 #include <sys/syslog.h> 55 #include <sys/systm.h> 56 57 #ifdef DDB 58 #include <ddb/ddb.h> 59 #include <ddb/db_lex.h> 60 #endif 61 62 #include <net/ethernet.h> 63 #include <net/if.h> 64 #include <net/if_arp.h> 65 #include <net/if_dl.h> 66 #include <net/if_types.h> 67 #include <net/if_var.h> 68 #include <net/debugnet.h> 69 70 #include <netinet/in.h> 71 #include <netinet/in_systm.h> 72 #include <netinet/in_var.h> 73 #include <netinet/ip.h> 74 #include <netinet/ip_var.h> 75 #include <netinet/ip_options.h> 76 #include <netinet/udp.h> 77 #include <netinet/udp_var.h> 78 #include <netinet/netdump/netdump.h> 79 80 #include <machine/in_cksum.h> 81 #include <machine/pcb.h> 82 83 #define NETDDEBUGV(f, ...) do { \ 84 if (nd_debug > 1) \ 85 printf(("%s: " f), __func__, ## __VA_ARGS__); \ 86 } while (0) 87 88 static void netdump_cleanup(void); 89 static int netdump_configure(struct diocskerneldump_arg *, 90 struct thread *); 91 static int netdump_dumper(void *priv __unused, void *virtual, 92 off_t offset, size_t length); 93 static bool netdump_enabled(void); 94 static int netdump_enabled_sysctl(SYSCTL_HANDLER_ARGS); 95 static int netdump_ioctl(struct cdev *dev __unused, u_long cmd, 96 caddr_t addr, int flags __unused, struct thread *td); 97 static int netdump_modevent(module_t mod, int type, void *priv); 98 static int netdump_start(struct dumperinfo *di, void *key, 99 uint32_t keysize); 100 static void netdump_unconfigure(void); 101 102 /* Must be at least as big as the chunks dumpsys() gives us. */ 103 static unsigned char nd_buf[MAXDUMPPGS * PAGE_SIZE]; 104 static int dump_failed; 105 106 /* Configuration parameters. */ 107 static struct { 108 char ndc_iface[IFNAMSIZ]; 109 union kd_ip ndc_server; 110 union kd_ip ndc_client; 111 union kd_ip ndc_gateway; 112 uint8_t ndc_af; 113 /* Runtime State */ 114 struct debugnet_pcb *nd_pcb; 115 off_t nd_tx_off; 116 size_t nd_buf_len; 117 } nd_conf; 118 #define nd_server nd_conf.ndc_server.in4 119 #define nd_client nd_conf.ndc_client.in4 120 #define nd_gateway nd_conf.ndc_gateway.in4 121 122 /* General dynamic settings. */ 123 static struct sx nd_conf_lk; 124 SX_SYSINIT(nd_conf, &nd_conf_lk, "netdump configuration lock"); 125 #define NETDUMP_WLOCK() sx_xlock(&nd_conf_lk) 126 #define NETDUMP_WUNLOCK() sx_xunlock(&nd_conf_lk) 127 #define NETDUMP_RLOCK() sx_slock(&nd_conf_lk) 128 #define NETDUMP_RUNLOCK() sx_sunlock(&nd_conf_lk) 129 #define NETDUMP_ASSERT_WLOCKED() sx_assert(&nd_conf_lk, SA_XLOCKED) 130 #define NETDUMP_ASSERT_LOCKED() sx_assert(&nd_conf_lk, SA_LOCKED) 131 static struct ifnet *nd_ifp; 132 static eventhandler_tag nd_detach_cookie; 133 134 FEATURE(netdump, "Netdump client support"); 135 136 static SYSCTL_NODE(_net, OID_AUTO, netdump, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 137 "netdump parameters"); 138 139 static int nd_debug; 140 SYSCTL_INT(_net_netdump, OID_AUTO, debug, CTLFLAG_RWTUN, 141 &nd_debug, 0, 142 "Debug message verbosity"); 143 SYSCTL_PROC(_net_netdump, OID_AUTO, enabled, 144 CTLFLAG_RD | CTLTYPE_INT | CTLFLAG_MPSAFE, NULL, 0, 145 netdump_enabled_sysctl, "I", 146 "netdump configuration status"); 147 static char nd_path[MAXPATHLEN]; 148 SYSCTL_STRING(_net_netdump, OID_AUTO, path, CTLFLAG_RW, 149 nd_path, sizeof(nd_path), 150 "Server path for output files"); 151 /* 152 * The following three variables were moved to debugnet(4), but these knobs 153 * were retained as aliases. 154 */ 155 SYSCTL_INT(_net_netdump, OID_AUTO, polls, CTLFLAG_RWTUN, 156 &debugnet_npolls, 0, 157 "Number of times to poll before assuming packet loss (0.5ms per poll)"); 158 SYSCTL_INT(_net_netdump, OID_AUTO, retries, CTLFLAG_RWTUN, 159 &debugnet_nretries, 0, 160 "Number of retransmit attempts before giving up"); 161 SYSCTL_INT(_net_netdump, OID_AUTO, arp_retries, CTLFLAG_RWTUN, 162 &debugnet_arp_nretries, 0, 163 "Number of ARP attempts before giving up"); 164 165 static bool nd_is_enabled; 166 static bool 167 netdump_enabled(void) 168 { 169 170 NETDUMP_ASSERT_LOCKED(); 171 return (nd_is_enabled); 172 } 173 174 static void 175 netdump_set_enabled(bool status) 176 { 177 178 NETDUMP_ASSERT_LOCKED(); 179 nd_is_enabled = status; 180 } 181 182 static int 183 netdump_enabled_sysctl(SYSCTL_HANDLER_ARGS) 184 { 185 int en, error; 186 187 NETDUMP_RLOCK(); 188 en = netdump_enabled(); 189 NETDUMP_RUNLOCK(); 190 191 error = SYSCTL_OUT(req, &en, sizeof(en)); 192 if (error != 0 || req->newptr == NULL) 193 return (error); 194 return (EPERM); 195 } 196 197 /*- 198 * Dumping specific primitives. 199 */ 200 201 /* 202 * Flush any buffered vmcore data. 203 */ 204 static int 205 netdump_flush_buf(void) 206 { 207 int error; 208 209 error = 0; 210 if (nd_conf.nd_buf_len != 0) { 211 struct debugnet_proto_aux auxdata = { 212 .dp_offset_start = nd_conf.nd_tx_off, 213 }; 214 error = debugnet_send(nd_conf.nd_pcb, DEBUGNET_DATA, nd_buf, 215 nd_conf.nd_buf_len, &auxdata); 216 if (error == 0) 217 nd_conf.nd_buf_len = 0; 218 } 219 return (error); 220 } 221 222 /* 223 * Callback from dumpsys() to dump a chunk of memory. 224 * Copies it out to our static buffer then sends it across the network. 225 * Detects the initial KDH and makes sure it is given a special packet type. 226 * 227 * Parameters: 228 * priv Unused. Optional private pointer. 229 * virtual Virtual address (where to read the data from) 230 * offset Offset from start of core file 231 * length Data length 232 * 233 * Return value: 234 * 0 on success 235 * errno on error 236 */ 237 static int 238 netdump_dumper(void *priv __unused, void *virtual, off_t offset, size_t length) 239 { 240 int error; 241 242 NETDDEBUGV("netdump_dumper(NULL, %p, NULL, %ju, %zu)\n", 243 virtual, (uintmax_t)offset, length); 244 245 if (virtual == NULL) { 246 error = netdump_flush_buf(); 247 if (error != 0) 248 dump_failed = 1; 249 250 if (dump_failed != 0) 251 printf("failed to dump the kernel core\n"); 252 else if ( 253 debugnet_sendempty(nd_conf.nd_pcb, DEBUGNET_FINISHED) != 0) 254 printf("failed to close the transaction\n"); 255 else 256 printf("\nnetdump finished.\n"); 257 netdump_cleanup(); 258 return (0); 259 } 260 if (length > sizeof(nd_buf)) { 261 netdump_cleanup(); 262 return (ENOSPC); 263 } 264 265 if (nd_conf.nd_buf_len + length > sizeof(nd_buf) || 266 (nd_conf.nd_buf_len != 0 && nd_conf.nd_tx_off + 267 nd_conf.nd_buf_len != offset)) { 268 error = netdump_flush_buf(); 269 if (error != 0) { 270 dump_failed = 1; 271 netdump_cleanup(); 272 return (error); 273 } 274 nd_conf.nd_tx_off = offset; 275 } 276 277 memmove(nd_buf + nd_conf.nd_buf_len, virtual, length); 278 nd_conf.nd_buf_len += length; 279 280 return (0); 281 } 282 283 /* 284 * Perform any initialization needed prior to transmitting the kernel core. 285 */ 286 static int 287 netdump_start(struct dumperinfo *di, void *key, uint32_t keysize) 288 { 289 struct debugnet_conn_params dcp; 290 struct debugnet_pcb *pcb; 291 char buf[INET_ADDRSTRLEN]; 292 int error; 293 294 error = 0; 295 296 /* Check if the dumping is allowed to continue. */ 297 if (!netdump_enabled()) 298 return (EINVAL); 299 300 if (!KERNEL_PANICKED()) { 301 printf( 302 "netdump_start: netdump may only be used after a panic\n"); 303 return (EINVAL); 304 } 305 306 memset(&dcp, 0, sizeof(dcp)); 307 308 if (nd_server.s_addr == INADDR_ANY) { 309 printf("netdump_start: can't netdump; no server IP given\n"); 310 return (EINVAL); 311 } 312 313 /* We start dumping at offset 0. */ 314 di->dumpoff = 0; 315 316 dcp.dc_ifp = nd_ifp; 317 318 dcp.dc_client = nd_client.s_addr; 319 dcp.dc_server = nd_server.s_addr; 320 dcp.dc_gateway = nd_gateway.s_addr; 321 322 dcp.dc_herald_port = NETDUMP_PORT; 323 dcp.dc_client_port = NETDUMP_ACKPORT; 324 325 dcp.dc_herald_data = nd_path; 326 dcp.dc_herald_datalen = (nd_path[0] == 0) ? 0 : strlen(nd_path) + 1; 327 328 error = debugnet_connect(&dcp, &pcb); 329 if (error != 0) { 330 printf("failed to contact netdump server\n"); 331 /* Squash debugnet to something the dumper code understands. */ 332 return (EINVAL); 333 } 334 335 printf("netdumping to %s (%6D)\n", inet_ntoa_r(nd_server, buf), 336 debugnet_get_gw_mac(pcb), ":"); 337 nd_conf.nd_pcb = pcb; 338 339 /* Send the key before the dump so a partial dump is still usable. */ 340 if (keysize > 0) { 341 if (keysize > sizeof(nd_buf)) { 342 printf("crypto key is too large (%u)\n", keysize); 343 error = EINVAL; 344 goto out; 345 } 346 memcpy(nd_buf, key, keysize); 347 error = debugnet_send(pcb, NETDUMP_EKCD_KEY, nd_buf, keysize, 348 NULL); 349 if (error != 0) { 350 printf("error %d sending crypto key\n", error); 351 goto out; 352 } 353 } 354 355 out: 356 if (error != 0) { 357 /* As above, squash errors. */ 358 error = EINVAL; 359 netdump_cleanup(); 360 } 361 return (error); 362 } 363 364 static int 365 netdump_write_headers(struct dumperinfo *di, struct kerneldumpheader *kdh) 366 { 367 int error; 368 369 error = netdump_flush_buf(); 370 if (error != 0) 371 goto out; 372 memcpy(nd_buf, kdh, sizeof(*kdh)); 373 error = debugnet_send(nd_conf.nd_pcb, NETDUMP_KDH, nd_buf, 374 sizeof(*kdh), NULL); 375 out: 376 if (error != 0) 377 netdump_cleanup(); 378 return (error); 379 } 380 381 /* 382 * Cleanup routine for a possibly failed netdump. 383 */ 384 static void 385 netdump_cleanup(void) 386 { 387 if (nd_conf.nd_pcb != NULL) { 388 debugnet_free(nd_conf.nd_pcb); 389 nd_conf.nd_pcb = NULL; 390 } 391 } 392 393 /*- 394 * KLD specific code. 395 */ 396 397 static struct cdevsw netdump_cdevsw = { 398 .d_version = D_VERSION, 399 .d_ioctl = netdump_ioctl, 400 .d_name = "netdump", 401 }; 402 403 static struct cdev *netdump_cdev; 404 405 static void 406 netdump_unconfigure(void) 407 { 408 struct diocskerneldump_arg kda; 409 410 NETDUMP_ASSERT_WLOCKED(); 411 KASSERT(netdump_enabled(), ("%s: not enabled", __func__)); 412 413 bzero(&kda, sizeof(kda)); 414 kda.kda_index = KDA_REMOVE_DEV; 415 (void)dumper_remove(nd_conf.ndc_iface, &kda); 416 417 if (nd_ifp != NULL) 418 if_rele(nd_ifp); 419 nd_ifp = NULL; 420 netdump_set_enabled(false); 421 422 log(LOG_WARNING, "netdump: Lost configured interface %s\n", 423 nd_conf.ndc_iface); 424 425 bzero(&nd_conf, sizeof(nd_conf)); 426 } 427 428 static void 429 netdump_ifdetach(void *arg __unused, struct ifnet *ifp) 430 { 431 432 NETDUMP_WLOCK(); 433 if (ifp == nd_ifp) 434 netdump_unconfigure(); 435 NETDUMP_WUNLOCK(); 436 } 437 438 /* 439 * td of NULL is a sentinel value that indicates a kernel caller (ddb(4) or 440 * modload-based tunable parameters). 441 */ 442 static int 443 netdump_configure(struct diocskerneldump_arg *conf, struct thread *td) 444 { 445 struct ifnet *ifp; 446 447 NETDUMP_ASSERT_WLOCKED(); 448 449 if (conf->kda_iface[0] != 0) { 450 if (td != NULL && !IS_DEFAULT_VNET(TD_TO_VNET(td))) 451 return (EINVAL); 452 CURVNET_SET(vnet0); 453 ifp = ifunit_ref(conf->kda_iface); 454 CURVNET_RESTORE(); 455 } else 456 ifp = NULL; 457 458 if (nd_ifp != NULL) 459 if_rele(nd_ifp); 460 nd_ifp = ifp; 461 netdump_set_enabled(true); 462 463 #define COPY_SIZED(elm) do { \ 464 _Static_assert(sizeof(nd_conf.ndc_ ## elm) == \ 465 sizeof(conf->kda_ ## elm), "elm " __XSTRING(elm) " mismatch"); \ 466 memcpy(&nd_conf.ndc_ ## elm, &conf->kda_ ## elm, \ 467 sizeof(nd_conf.ndc_ ## elm)); \ 468 } while (0) 469 COPY_SIZED(iface); 470 COPY_SIZED(server); 471 COPY_SIZED(client); 472 COPY_SIZED(gateway); 473 COPY_SIZED(af); 474 #undef COPY_SIZED 475 476 return (0); 477 } 478 479 /* 480 * ioctl(2) handler for the netdump device. This is currently only used to 481 * register netdump as a dump device. 482 * 483 * Parameters: 484 * dev, Unused. 485 * cmd, The ioctl to be handled. 486 * addr, The parameter for the ioctl. 487 * flags, Unused. 488 * td, The thread invoking this ioctl. 489 * 490 * Returns: 491 * 0 on success, and an errno value on failure. 492 */ 493 static int 494 netdump_ioctl(struct cdev *dev __unused, u_long cmd, caddr_t addr, 495 int flags __unused, struct thread *td) 496 { 497 struct diocskerneldump_arg *conf; 498 struct dumperinfo dumper; 499 uint8_t *encryptedkey; 500 int error; 501 502 conf = NULL; 503 error = 0; 504 NETDUMP_WLOCK(); 505 506 switch (cmd) { 507 case DIOCGKERNELDUMP: 508 conf = (void *)addr; 509 /* 510 * For now, index is ignored; netdump doesn't support multiple 511 * configurations (yet). 512 */ 513 if (!netdump_enabled()) { 514 error = ENXIO; 515 conf = NULL; 516 break; 517 } 518 519 if (nd_ifp != NULL) 520 strlcpy(conf->kda_iface, nd_ifp->if_xname, 521 sizeof(conf->kda_iface)); 522 memcpy(&conf->kda_server, &nd_server, sizeof(nd_server)); 523 memcpy(&conf->kda_client, &nd_client, sizeof(nd_client)); 524 memcpy(&conf->kda_gateway, &nd_gateway, sizeof(nd_gateway)); 525 conf->kda_af = nd_conf.ndc_af; 526 conf = NULL; 527 break; 528 case DIOCSKERNELDUMP: 529 encryptedkey = NULL; 530 conf = (void *)addr; 531 532 /* Netdump only supports IP4 at this time. */ 533 if (conf->kda_af != AF_INET) { 534 error = EPROTONOSUPPORT; 535 break; 536 } 537 538 conf->kda_iface[sizeof(conf->kda_iface) - 1] = '\0'; 539 if (conf->kda_index == KDA_REMOVE || 540 conf->kda_index == KDA_REMOVE_DEV || 541 conf->kda_index == KDA_REMOVE_ALL) { 542 if (netdump_enabled()) 543 netdump_unconfigure(); 544 if (conf->kda_index == KDA_REMOVE_ALL) 545 error = dumper_remove(NULL, conf); 546 break; 547 } 548 549 error = netdump_configure(conf, td); 550 if (error != 0) 551 break; 552 553 if (conf->kda_encryption != KERNELDUMP_ENC_NONE) { 554 if (conf->kda_encryptedkeysize <= 0 || 555 conf->kda_encryptedkeysize > 556 KERNELDUMP_ENCKEY_MAX_SIZE) { 557 error = EINVAL; 558 break; 559 } 560 encryptedkey = malloc(conf->kda_encryptedkeysize, 561 M_TEMP, M_WAITOK); 562 error = copyin(conf->kda_encryptedkey, encryptedkey, 563 conf->kda_encryptedkeysize); 564 if (error != 0) { 565 free(encryptedkey, M_TEMP); 566 break; 567 } 568 569 conf->kda_encryptedkey = encryptedkey; 570 } 571 572 memset(&dumper, 0, sizeof(dumper)); 573 dumper.dumper_start = netdump_start; 574 dumper.dumper_hdr = netdump_write_headers; 575 dumper.dumper = netdump_dumper; 576 dumper.priv = NULL; 577 dumper.blocksize = NETDUMP_DATASIZE; 578 dumper.maxiosize = MAXDUMPPGS * PAGE_SIZE; 579 dumper.mediaoffset = 0; 580 dumper.mediasize = 0; 581 582 error = dumper_insert(&dumper, conf->kda_iface, conf); 583 zfree(encryptedkey, M_TEMP); 584 if (error != 0) 585 netdump_unconfigure(); 586 break; 587 default: 588 error = ENOTTY; 589 break; 590 } 591 if (conf != NULL) 592 explicit_bzero(conf, sizeof(*conf)); 593 NETDUMP_WUNLOCK(); 594 return (error); 595 } 596 597 /* 598 * Called upon system init or kld load. Initializes the netdump parameters to 599 * sane defaults (locates the first available NIC and uses the first IPv4 IP on 600 * that card as the client IP). Leaves the server IP unconfigured. 601 * 602 * Parameters: 603 * mod, Unused. 604 * what, The module event type. 605 * priv, Unused. 606 * 607 * Returns: 608 * int, An errno value if an error occured, 0 otherwise. 609 */ 610 static int 611 netdump_modevent(module_t mod __unused, int what, void *priv __unused) 612 { 613 struct diocskerneldump_arg conf; 614 char *arg; 615 int error; 616 617 error = 0; 618 switch (what) { 619 case MOD_LOAD: 620 error = make_dev_p(MAKEDEV_WAITOK, &netdump_cdev, 621 &netdump_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "netdump"); 622 if (error != 0) 623 return (error); 624 625 nd_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event, 626 netdump_ifdetach, NULL, EVENTHANDLER_PRI_ANY); 627 628 if ((arg = kern_getenv("net.dump.iface")) != NULL) { 629 strlcpy(conf.kda_iface, arg, sizeof(conf.kda_iface)); 630 freeenv(arg); 631 632 if ((arg = kern_getenv("net.dump.server")) != NULL) { 633 inet_aton(arg, &conf.kda_server.in4); 634 freeenv(arg); 635 } 636 if ((arg = kern_getenv("net.dump.client")) != NULL) { 637 inet_aton(arg, &conf.kda_client.in4); 638 freeenv(arg); 639 } 640 if ((arg = kern_getenv("net.dump.gateway")) != NULL) { 641 inet_aton(arg, &conf.kda_gateway.in4); 642 freeenv(arg); 643 } 644 conf.kda_af = AF_INET; 645 646 /* Ignore errors; we print a message to the console. */ 647 NETDUMP_WLOCK(); 648 (void)netdump_configure(&conf, NULL); 649 NETDUMP_WUNLOCK(); 650 } 651 break; 652 case MOD_UNLOAD: 653 NETDUMP_WLOCK(); 654 if (netdump_enabled()) { 655 printf("netdump: disabling dump device for unload\n"); 656 netdump_unconfigure(); 657 } 658 NETDUMP_WUNLOCK(); 659 destroy_dev(netdump_cdev); 660 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 661 nd_detach_cookie); 662 break; 663 default: 664 error = EOPNOTSUPP; 665 break; 666 } 667 return (error); 668 } 669 670 static moduledata_t netdump_mod = { 671 "netdump", 672 netdump_modevent, 673 NULL, 674 }; 675 676 MODULE_VERSION(netdump, 1); 677 DECLARE_MODULE(netdump, netdump_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 678 679 #ifdef DDB 680 /* 681 * Usage: netdump -s <server> [-g <gateway] -c <localip> -i <interface> 682 * 683 * Order is not significant. 684 * 685 * Currently, this command does not support configuring encryption or 686 * compression. 687 */ 688 DB_FUNC(netdump, db_netdump_cmd, db_cmd_table, CS_OWN, NULL) 689 { 690 static struct diocskerneldump_arg conf; 691 static char blockbuf[NETDUMP_DATASIZE]; 692 static union { 693 struct dumperinfo di; 694 /* For valid di_devname. */ 695 char di_buf[sizeof(struct dumperinfo) + 1]; 696 } u; 697 698 struct debugnet_ddb_config params; 699 int error; 700 701 error = debugnet_parse_ddb_cmd("netdump", ¶ms); 702 if (error != 0) { 703 db_printf("Error configuring netdump: %d\n", error); 704 return; 705 } 706 707 /* Translate to a netdump dumper config. */ 708 memset(&conf, 0, sizeof(conf)); 709 710 if (params.dd_ifp != NULL) 711 strlcpy(conf.kda_iface, if_name(params.dd_ifp), 712 sizeof(conf.kda_iface)); 713 714 conf.kda_af = AF_INET; 715 conf.kda_server.in4 = (struct in_addr) { params.dd_server }; 716 if (params.dd_has_client) 717 conf.kda_client.in4 = (struct in_addr) { params.dd_client }; 718 else 719 conf.kda_client.in4 = (struct in_addr) { INADDR_ANY }; 720 if (params.dd_has_gateway) 721 conf.kda_gateway.in4 = (struct in_addr) { params.dd_gateway }; 722 else 723 conf.kda_gateway.in4 = (struct in_addr) { INADDR_ANY }; 724 725 /* Set the global netdump config to these options. */ 726 error = netdump_configure(&conf, NULL); 727 if (error != 0) { 728 db_printf("Error enabling netdump: %d\n", error); 729 return; 730 } 731 732 /* Fake the generic dump configuration list entry to avoid malloc. */ 733 memset(&u.di_buf, 0, sizeof(u.di_buf)); 734 u.di.dumper_start = netdump_start; 735 u.di.dumper_hdr = netdump_write_headers; 736 u.di.dumper = netdump_dumper; 737 u.di.priv = NULL; 738 u.di.blocksize = NETDUMP_DATASIZE; 739 u.di.maxiosize = MAXDUMPPGS * PAGE_SIZE; 740 u.di.mediaoffset = 0; 741 u.di.mediasize = 0; 742 u.di.blockbuf = blockbuf; 743 744 dumper_ddb_insert(&u.di); 745 746 error = doadump(false); 747 748 dumper_ddb_remove(&u.di); 749 if (error != 0) 750 db_printf("Cannot dump: %d\n", error); 751 } 752 #endif /* DDB */ 753