1 /* 2 * QEMU System Emulator 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "qemu/osdep.h" 26 #include "net/slirp.h" 27 28 29 #ifndef _WIN32 30 #include <pwd.h> 31 #include <sys/wait.h> 32 #endif 33 #include "net/net.h" 34 #include "clients.h" 35 #include "hub.h" 36 #include "monitor/monitor.h" 37 #include "qemu/error-report.h" 38 #include "qemu/sockets.h" 39 #include "slirp/libslirp.h" 40 #include "slirp/ip6.h" 41 #include "chardev/char-fe.h" 42 #include "sysemu/sysemu.h" 43 #include "qemu/cutils.h" 44 #include "qapi/error.h" 45 #include "qapi/qmp/qdict.h" 46 47 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) 48 { 49 const char *p, *p1; 50 int len; 51 p = *pp; 52 p1 = strchr(p, sep); 53 if (!p1) 54 return -1; 55 len = p1 - p; 56 p1++; 57 if (buf_size > 0) { 58 if (len > buf_size - 1) 59 len = buf_size - 1; 60 memcpy(buf, p, len); 61 buf[len] = '\0'; 62 } 63 *pp = p1; 64 return 0; 65 } 66 67 /* slirp network adapter */ 68 69 #define SLIRP_CFG_HOSTFWD 1 70 71 struct slirp_config_str { 72 struct slirp_config_str *next; 73 int flags; 74 char str[1024]; 75 }; 76 77 typedef struct SlirpState { 78 NetClientState nc; 79 QTAILQ_ENTRY(SlirpState) entry; 80 Slirp *slirp; 81 Notifier exit_notifier; 82 #ifndef _WIN32 83 gchar *smb_dir; 84 #endif 85 } SlirpState; 86 87 static struct slirp_config_str *slirp_configs; 88 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks = 89 QTAILQ_HEAD_INITIALIZER(slirp_stacks); 90 91 static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp); 92 static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp); 93 94 #ifndef _WIN32 95 static int slirp_smb(SlirpState *s, const char *exported_dir, 96 struct in_addr vserver_addr, Error **errp); 97 static void slirp_smb_cleanup(SlirpState *s); 98 #else 99 static inline void slirp_smb_cleanup(SlirpState *s) { } 100 #endif 101 102 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len) 103 { 104 SlirpState *s = opaque; 105 106 qemu_send_packet(&s->nc, pkt, pkt_len); 107 } 108 109 static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size) 110 { 111 SlirpState *s = DO_UPCAST(SlirpState, nc, nc); 112 113 slirp_input(s->slirp, buf, size); 114 115 return size; 116 } 117 118 static void slirp_smb_exit(Notifier *n, void *data) 119 { 120 SlirpState *s = container_of(n, SlirpState, exit_notifier); 121 slirp_smb_cleanup(s); 122 } 123 124 static void net_slirp_cleanup(NetClientState *nc) 125 { 126 SlirpState *s = DO_UPCAST(SlirpState, nc, nc); 127 128 slirp_cleanup(s->slirp); 129 if (s->exit_notifier.notify) { 130 qemu_remove_exit_notifier(&s->exit_notifier); 131 } 132 slirp_smb_cleanup(s); 133 QTAILQ_REMOVE(&slirp_stacks, s, entry); 134 } 135 136 static NetClientInfo net_slirp_info = { 137 .type = NET_CLIENT_DRIVER_USER, 138 .size = sizeof(SlirpState), 139 .receive = net_slirp_receive, 140 .cleanup = net_slirp_cleanup, 141 }; 142 143 static int net_slirp_init(NetClientState *peer, const char *model, 144 const char *name, int restricted, 145 bool ipv4, const char *vnetwork, const char *vhost, 146 bool ipv6, const char *vprefix6, int vprefix6_len, 147 const char *vhost6, 148 const char *vhostname, const char *tftp_export, 149 const char *bootfile, const char *vdhcp_start, 150 const char *vnameserver, const char *vnameserver6, 151 const char *smb_export, const char *vsmbserver, 152 const char **dnssearch, const char *vdomainname, 153 Error **errp) 154 { 155 /* default settings according to historic slirp */ 156 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */ 157 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */ 158 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */ 159 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */ 160 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */ 161 struct in6_addr ip6_prefix; 162 struct in6_addr ip6_host; 163 struct in6_addr ip6_dns; 164 #ifndef _WIN32 165 struct in_addr smbsrv = { .s_addr = 0 }; 166 #endif 167 NetClientState *nc; 168 SlirpState *s; 169 char buf[20]; 170 uint32_t addr; 171 int shift; 172 char *end; 173 struct slirp_config_str *config; 174 175 if (!ipv4 && (vnetwork || vhost || vnameserver)) { 176 error_setg(errp, "IPv4 disabled but netmask/host/dns provided"); 177 return -1; 178 } 179 180 if (!ipv6 && (vprefix6 || vhost6 || vnameserver6)) { 181 error_setg(errp, "IPv6 disabled but prefix/host6/dns6 provided"); 182 return -1; 183 } 184 185 if (!ipv4 && !ipv6) { 186 /* It doesn't make sense to disable both */ 187 error_setg(errp, "IPv4 and IPv6 disabled"); 188 return -1; 189 } 190 191 if (vnetwork) { 192 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) { 193 if (!inet_aton(vnetwork, &net)) { 194 error_setg(errp, "Failed to parse netmask"); 195 return -1; 196 } 197 addr = ntohl(net.s_addr); 198 if (!(addr & 0x80000000)) { 199 mask.s_addr = htonl(0xff000000); /* class A */ 200 } else if ((addr & 0xfff00000) == 0xac100000) { 201 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */ 202 } else if ((addr & 0xc0000000) == 0x80000000) { 203 mask.s_addr = htonl(0xffff0000); /* class B */ 204 } else if ((addr & 0xffff0000) == 0xc0a80000) { 205 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */ 206 } else if ((addr & 0xffff0000) == 0xc6120000) { 207 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */ 208 } else if ((addr & 0xe0000000) == 0xe0000000) { 209 mask.s_addr = htonl(0xffffff00); /* class C */ 210 } else { 211 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */ 212 } 213 } else { 214 if (!inet_aton(buf, &net)) { 215 error_setg(errp, "Failed to parse netmask"); 216 return -1; 217 } 218 shift = strtol(vnetwork, &end, 10); 219 if (*end != '\0') { 220 if (!inet_aton(vnetwork, &mask)) { 221 error_setg(errp, 222 "Failed to parse netmask (trailing chars)"); 223 return -1; 224 } 225 } else if (shift < 4 || shift > 32) { 226 error_setg(errp, 227 "Invalid netmask provided (must be in range 4-32)"); 228 return -1; 229 } else { 230 mask.s_addr = htonl(0xffffffff << (32 - shift)); 231 } 232 } 233 net.s_addr &= mask.s_addr; 234 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr); 235 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr); 236 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr); 237 } 238 239 if (vhost && !inet_aton(vhost, &host)) { 240 error_setg(errp, "Failed to parse host"); 241 return -1; 242 } 243 if ((host.s_addr & mask.s_addr) != net.s_addr) { 244 error_setg(errp, "Host doesn't belong to network"); 245 return -1; 246 } 247 248 if (vnameserver && !inet_aton(vnameserver, &dns)) { 249 error_setg(errp, "Failed to parse DNS"); 250 return -1; 251 } 252 if ((dns.s_addr & mask.s_addr) != net.s_addr) { 253 error_setg(errp, "DNS doesn't belong to network"); 254 return -1; 255 } 256 if (dns.s_addr == host.s_addr) { 257 error_setg(errp, "DNS must be different from host"); 258 return -1; 259 } 260 261 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) { 262 error_setg(errp, "Failed to parse DHCP start address"); 263 return -1; 264 } 265 if ((dhcp.s_addr & mask.s_addr) != net.s_addr) { 266 error_setg(errp, "DHCP doesn't belong to network"); 267 return -1; 268 } 269 if (dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) { 270 error_setg(errp, "DNS must be different from host and DNS"); 271 return -1; 272 } 273 274 #ifndef _WIN32 275 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) { 276 error_setg(errp, "Failed to parse SMB address"); 277 return -1; 278 } 279 #endif 280 281 #if defined(_WIN32) && (_WIN32_WINNT < 0x0600) 282 /* No inet_pton helper before Vista... */ 283 if (vprefix6) { 284 /* Unsupported */ 285 error_setg(errp, "IPv6 prefix not supported"); 286 return -1; 287 } 288 memset(&ip6_prefix, 0, sizeof(ip6_prefix)); 289 ip6_prefix.s6_addr[0] = 0xfe; 290 ip6_prefix.s6_addr[1] = 0xc0; 291 #else 292 if (!vprefix6) { 293 vprefix6 = "fec0::"; 294 } 295 if (!inet_pton(AF_INET6, vprefix6, &ip6_prefix)) { 296 error_setg(errp, "Failed to parse IPv6 prefix"); 297 return -1; 298 } 299 #endif 300 301 if (!vprefix6_len) { 302 vprefix6_len = 64; 303 } 304 if (vprefix6_len < 0 || vprefix6_len > 126) { 305 error_setg(errp, 306 "Invalid prefix provided (prefix len must be in range 0-126"); 307 return -1; 308 } 309 310 if (vhost6) { 311 #if defined(_WIN32) && (_WIN32_WINNT < 0x0600) 312 error_setg(errp, "IPv6 host not supported"); 313 return -1; 314 #else 315 if (!inet_pton(AF_INET6, vhost6, &ip6_host)) { 316 error_setg(errp, "Failed to parse IPv6 host"); 317 return -1; 318 } 319 if (!in6_equal_net(&ip6_prefix, &ip6_host, vprefix6_len)) { 320 error_setg(errp, "IPv6 Host doesn't belong to network"); 321 return -1; 322 } 323 #endif 324 } else { 325 ip6_host = ip6_prefix; 326 ip6_host.s6_addr[15] |= 2; 327 } 328 329 if (vnameserver6) { 330 #if defined(_WIN32) && (_WIN32_WINNT < 0x0600) 331 error_setg(errp, "IPv6 DNS not supported"); 332 return -1; 333 #else 334 if (!inet_pton(AF_INET6, vnameserver6, &ip6_dns)) { 335 error_setg(errp, "Failed to parse IPv6 DNS"); 336 return -1; 337 } 338 if (!in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) { 339 error_setg(errp, "IPv6 DNS doesn't belong to network"); 340 return -1; 341 } 342 #endif 343 } else { 344 ip6_dns = ip6_prefix; 345 ip6_dns.s6_addr[15] |= 3; 346 } 347 348 if (vdomainname && !*vdomainname) { 349 error_setg(errp, "'domainname' parameter cannot be empty"); 350 return -1; 351 } 352 353 354 nc = qemu_new_net_client(&net_slirp_info, peer, model, name); 355 356 snprintf(nc->info_str, sizeof(nc->info_str), 357 "net=%s,restrict=%s", inet_ntoa(net), 358 restricted ? "on" : "off"); 359 360 s = DO_UPCAST(SlirpState, nc, nc); 361 362 s->slirp = slirp_init(restricted, ipv4, net, mask, host, 363 ipv6, ip6_prefix, vprefix6_len, ip6_host, 364 vhostname, tftp_export, bootfile, dhcp, 365 dns, ip6_dns, dnssearch, vdomainname, s); 366 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry); 367 368 for (config = slirp_configs; config; config = config->next) { 369 if (config->flags & SLIRP_CFG_HOSTFWD) { 370 if (slirp_hostfwd(s, config->str, errp) < 0) { 371 goto error; 372 } 373 } else { 374 if (slirp_guestfwd(s, config->str, errp) < 0) { 375 goto error; 376 } 377 } 378 } 379 #ifndef _WIN32 380 if (smb_export) { 381 if (slirp_smb(s, smb_export, smbsrv, errp) < 0) { 382 goto error; 383 } 384 } 385 #endif 386 387 s->exit_notifier.notify = slirp_smb_exit; 388 qemu_add_exit_notifier(&s->exit_notifier); 389 return 0; 390 391 error: 392 qemu_del_net_client(nc); 393 return -1; 394 } 395 396 static SlirpState *slirp_lookup(Monitor *mon, const char *hub_id, 397 const char *name) 398 { 399 if (name) { 400 NetClientState *nc; 401 if (hub_id) { 402 nc = net_hub_find_client_by_name(strtol(hub_id, NULL, 0), name); 403 if (!nc) { 404 monitor_printf(mon, "unrecognized (hub-id, stackname) pair\n"); 405 return NULL; 406 } 407 } else { 408 nc = qemu_find_netdev(name); 409 if (!nc) { 410 monitor_printf(mon, "unrecognized netdev id '%s'\n", name); 411 return NULL; 412 } 413 } 414 if (strcmp(nc->model, "user")) { 415 monitor_printf(mon, "invalid device specified\n"); 416 return NULL; 417 } 418 return DO_UPCAST(SlirpState, nc, nc); 419 } else { 420 if (QTAILQ_EMPTY(&slirp_stacks)) { 421 monitor_printf(mon, "user mode network stack not in use\n"); 422 return NULL; 423 } 424 return QTAILQ_FIRST(&slirp_stacks); 425 } 426 } 427 428 void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict) 429 { 430 struct in_addr host_addr = { .s_addr = INADDR_ANY }; 431 int host_port; 432 char buf[256]; 433 const char *src_str, *p; 434 SlirpState *s; 435 int is_udp = 0; 436 int err; 437 const char *arg1 = qdict_get_str(qdict, "arg1"); 438 const char *arg2 = qdict_get_try_str(qdict, "arg2"); 439 const char *arg3 = qdict_get_try_str(qdict, "arg3"); 440 441 if (arg3) { 442 s = slirp_lookup(mon, arg1, arg2); 443 src_str = arg3; 444 } else if (arg2) { 445 s = slirp_lookup(mon, NULL, arg1); 446 src_str = arg2; 447 } else { 448 s = slirp_lookup(mon, NULL, NULL); 449 src_str = arg1; 450 } 451 if (!s) { 452 return; 453 } 454 455 p = src_str; 456 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 457 goto fail_syntax; 458 } 459 460 if (!strcmp(buf, "tcp") || buf[0] == '\0') { 461 is_udp = 0; 462 } else if (!strcmp(buf, "udp")) { 463 is_udp = 1; 464 } else { 465 goto fail_syntax; 466 } 467 468 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 469 goto fail_syntax; 470 } 471 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { 472 goto fail_syntax; 473 } 474 475 if (qemu_strtoi(p, NULL, 10, &host_port)) { 476 goto fail_syntax; 477 } 478 479 err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port); 480 481 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str, 482 err ? "not found" : "removed"); 483 return; 484 485 fail_syntax: 486 monitor_printf(mon, "invalid format\n"); 487 } 488 489 static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp) 490 { 491 struct in_addr host_addr = { .s_addr = INADDR_ANY }; 492 struct in_addr guest_addr = { .s_addr = 0 }; 493 int host_port, guest_port; 494 const char *p; 495 char buf[256]; 496 int is_udp; 497 char *end; 498 const char *fail_reason = "Unknown reason"; 499 500 p = redir_str; 501 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 502 fail_reason = "No : separators"; 503 goto fail_syntax; 504 } 505 if (!strcmp(buf, "tcp") || buf[0] == '\0') { 506 is_udp = 0; 507 } else if (!strcmp(buf, "udp")) { 508 is_udp = 1; 509 } else { 510 fail_reason = "Bad protocol name"; 511 goto fail_syntax; 512 } 513 514 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 515 fail_reason = "Missing : separator"; 516 goto fail_syntax; 517 } 518 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { 519 fail_reason = "Bad host address"; 520 goto fail_syntax; 521 } 522 523 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { 524 fail_reason = "Bad host port separator"; 525 goto fail_syntax; 526 } 527 host_port = strtol(buf, &end, 0); 528 if (*end != '\0' || host_port < 0 || host_port > 65535) { 529 fail_reason = "Bad host port"; 530 goto fail_syntax; 531 } 532 533 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 534 fail_reason = "Missing guest address"; 535 goto fail_syntax; 536 } 537 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) { 538 fail_reason = "Bad guest address"; 539 goto fail_syntax; 540 } 541 542 guest_port = strtol(p, &end, 0); 543 if (*end != '\0' || guest_port < 1 || guest_port > 65535) { 544 fail_reason = "Bad guest port"; 545 goto fail_syntax; 546 } 547 548 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr, 549 guest_port) < 0) { 550 error_setg(errp, "Could not set up host forwarding rule '%s'", 551 redir_str); 552 return -1; 553 } 554 return 0; 555 556 fail_syntax: 557 error_setg(errp, "Invalid host forwarding rule '%s' (%s)", redir_str, 558 fail_reason); 559 return -1; 560 } 561 562 void hmp_hostfwd_add(Monitor *mon, const QDict *qdict) 563 { 564 const char *redir_str; 565 SlirpState *s; 566 const char *arg1 = qdict_get_str(qdict, "arg1"); 567 const char *arg2 = qdict_get_try_str(qdict, "arg2"); 568 const char *arg3 = qdict_get_try_str(qdict, "arg3"); 569 570 if (arg3) { 571 s = slirp_lookup(mon, arg1, arg2); 572 redir_str = arg3; 573 } else if (arg2) { 574 s = slirp_lookup(mon, NULL, arg1); 575 redir_str = arg2; 576 } else { 577 s = slirp_lookup(mon, NULL, NULL); 578 redir_str = arg1; 579 } 580 if (s) { 581 Error *err = NULL; 582 if (slirp_hostfwd(s, redir_str, &err) < 0) { 583 error_report_err(err); 584 } 585 } 586 587 } 588 589 #ifndef _WIN32 590 591 /* automatic user mode samba server configuration */ 592 static void slirp_smb_cleanup(SlirpState *s) 593 { 594 int ret; 595 596 if (s->smb_dir) { 597 gchar *cmd = g_strdup_printf("rm -rf %s", s->smb_dir); 598 ret = system(cmd); 599 if (ret == -1 || !WIFEXITED(ret)) { 600 error_report("'%s' failed.", cmd); 601 } else if (WEXITSTATUS(ret)) { 602 error_report("'%s' failed. Error code: %d", 603 cmd, WEXITSTATUS(ret)); 604 } 605 g_free(cmd); 606 g_free(s->smb_dir); 607 s->smb_dir = NULL; 608 } 609 } 610 611 static int slirp_smb(SlirpState* s, const char *exported_dir, 612 struct in_addr vserver_addr, Error **errp) 613 { 614 char *smb_conf; 615 char *smb_cmdline; 616 struct passwd *passwd; 617 FILE *f; 618 619 passwd = getpwuid(geteuid()); 620 if (!passwd) { 621 error_setg(errp, "Failed to retrieve user name"); 622 return -1; 623 } 624 625 if (access(CONFIG_SMBD_COMMAND, F_OK)) { 626 error_setg(errp, "Could not find '%s', please install it", 627 CONFIG_SMBD_COMMAND); 628 return -1; 629 } 630 631 if (access(exported_dir, R_OK | X_OK)) { 632 error_setg(errp, "Error accessing shared directory '%s': %s", 633 exported_dir, strerror(errno)); 634 return -1; 635 } 636 637 s->smb_dir = g_dir_make_tmp("qemu-smb.XXXXXX", NULL); 638 if (!s->smb_dir) { 639 error_setg(errp, "Could not create samba server dir"); 640 return -1; 641 } 642 smb_conf = g_strdup_printf("%s/%s", s->smb_dir, "smb.conf"); 643 644 f = fopen(smb_conf, "w"); 645 if (!f) { 646 slirp_smb_cleanup(s); 647 error_setg(errp, 648 "Could not create samba server configuration file '%s'", 649 smb_conf); 650 g_free(smb_conf); 651 return -1; 652 } 653 fprintf(f, 654 "[global]\n" 655 "private dir=%s\n" 656 "interfaces=127.0.0.1\n" 657 "bind interfaces only=yes\n" 658 "pid directory=%s\n" 659 "lock directory=%s\n" 660 "state directory=%s\n" 661 "cache directory=%s\n" 662 "ncalrpc dir=%s/ncalrpc\n" 663 "log file=%s/log.smbd\n" 664 "smb passwd file=%s/smbpasswd\n" 665 "security = user\n" 666 "map to guest = Bad User\n" 667 "load printers = no\n" 668 "printing = bsd\n" 669 "disable spoolss = yes\n" 670 "usershare max shares = 0\n" 671 "[qemu]\n" 672 "path=%s\n" 673 "read only=no\n" 674 "guest ok=yes\n" 675 "force user=%s\n", 676 s->smb_dir, 677 s->smb_dir, 678 s->smb_dir, 679 s->smb_dir, 680 s->smb_dir, 681 s->smb_dir, 682 s->smb_dir, 683 s->smb_dir, 684 exported_dir, 685 passwd->pw_name 686 ); 687 fclose(f); 688 689 smb_cmdline = g_strdup_printf("%s -l %s -s %s", 690 CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf); 691 g_free(smb_conf); 692 693 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0 || 694 slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 445) < 0) { 695 slirp_smb_cleanup(s); 696 g_free(smb_cmdline); 697 error_setg(errp, "Conflicting/invalid smbserver address"); 698 return -1; 699 } 700 g_free(smb_cmdline); 701 return 0; 702 } 703 704 #endif /* !defined(_WIN32) */ 705 706 struct GuestFwd { 707 CharBackend hd; 708 struct in_addr server; 709 int port; 710 Slirp *slirp; 711 }; 712 713 static int guestfwd_can_read(void *opaque) 714 { 715 struct GuestFwd *fwd = opaque; 716 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port); 717 } 718 719 static void guestfwd_read(void *opaque, const uint8_t *buf, int size) 720 { 721 struct GuestFwd *fwd = opaque; 722 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size); 723 } 724 725 static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp) 726 { 727 struct in_addr server = { .s_addr = 0 }; 728 struct GuestFwd *fwd; 729 const char *p; 730 char buf[128]; 731 char *end; 732 int port; 733 734 p = config_str; 735 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 736 goto fail_syntax; 737 } 738 if (strcmp(buf, "tcp") && buf[0] != '\0') { 739 goto fail_syntax; 740 } 741 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 742 goto fail_syntax; 743 } 744 if (buf[0] != '\0' && !inet_aton(buf, &server)) { 745 goto fail_syntax; 746 } 747 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { 748 goto fail_syntax; 749 } 750 port = strtol(buf, &end, 10); 751 if (*end != '\0' || port < 1 || port > 65535) { 752 goto fail_syntax; 753 } 754 755 snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port); 756 757 if ((strlen(p) > 4) && !strncmp(p, "cmd:", 4)) { 758 if (slirp_add_exec(s->slirp, 0, &p[4], &server, port) < 0) { 759 error_setg(errp, "Conflicting/invalid host:port in guest " 760 "forwarding rule '%s'", config_str); 761 return -1; 762 } 763 } else { 764 Error *err = NULL; 765 Chardev *chr = qemu_chr_new(buf, p); 766 767 if (!chr) { 768 error_setg(errp, "Could not open guest forwarding device '%s'", 769 buf); 770 return -1; 771 } 772 773 fwd = g_new(struct GuestFwd, 1); 774 qemu_chr_fe_init(&fwd->hd, chr, &err); 775 if (err) { 776 error_propagate(errp, err); 777 g_free(fwd); 778 return -1; 779 } 780 781 if (slirp_add_exec(s->slirp, 3, &fwd->hd, &server, port) < 0) { 782 error_setg(errp, "Conflicting/invalid host:port in guest " 783 "forwarding rule '%s'", config_str); 784 g_free(fwd); 785 return -1; 786 } 787 fwd->server = server; 788 fwd->port = port; 789 fwd->slirp = s->slirp; 790 791 qemu_chr_fe_set_handlers(&fwd->hd, guestfwd_can_read, guestfwd_read, 792 NULL, NULL, fwd, NULL, true); 793 } 794 return 0; 795 796 fail_syntax: 797 error_setg(errp, "Invalid guest forwarding rule '%s'", config_str); 798 return -1; 799 } 800 801 void hmp_info_usernet(Monitor *mon, const QDict *qdict) 802 { 803 SlirpState *s; 804 805 QTAILQ_FOREACH(s, &slirp_stacks, entry) { 806 int id; 807 bool got_hub_id = net_hub_id_for_client(&s->nc, &id) == 0; 808 monitor_printf(mon, "Hub %d (%s):\n", 809 got_hub_id ? id : -1, 810 s->nc.name); 811 slirp_connection_info(s->slirp, mon); 812 } 813 } 814 815 static void 816 net_init_slirp_configs(const StringList *fwd, int flags) 817 { 818 while (fwd) { 819 struct slirp_config_str *config; 820 821 config = g_malloc0(sizeof(*config)); 822 pstrcpy(config->str, sizeof(config->str), fwd->value->str); 823 config->flags = flags; 824 config->next = slirp_configs; 825 slirp_configs = config; 826 827 fwd = fwd->next; 828 } 829 } 830 831 static const char **slirp_dnssearch(const StringList *dnsname) 832 { 833 const StringList *c = dnsname; 834 size_t i = 0, num_opts = 0; 835 const char **ret; 836 837 while (c) { 838 num_opts++; 839 c = c->next; 840 } 841 842 if (num_opts == 0) { 843 return NULL; 844 } 845 846 ret = g_malloc((num_opts + 1) * sizeof(*ret)); 847 c = dnsname; 848 while (c) { 849 ret[i++] = c->value->str; 850 c = c->next; 851 } 852 ret[i] = NULL; 853 return ret; 854 } 855 856 int net_init_slirp(const Netdev *netdev, const char *name, 857 NetClientState *peer, Error **errp) 858 { 859 struct slirp_config_str *config; 860 char *vnet; 861 int ret; 862 const NetdevUserOptions *user; 863 const char **dnssearch; 864 bool ipv4 = true, ipv6 = true; 865 866 assert(netdev->type == NET_CLIENT_DRIVER_USER); 867 user = &netdev->u.user; 868 869 if ((user->has_ipv6 && user->ipv6 && !user->has_ipv4) || 870 (user->has_ipv4 && !user->ipv4)) { 871 ipv4 = 0; 872 } 873 if ((user->has_ipv4 && user->ipv4 && !user->has_ipv6) || 874 (user->has_ipv6 && !user->ipv6)) { 875 ipv6 = 0; 876 } 877 878 vnet = user->has_net ? g_strdup(user->net) : 879 user->has_ip ? g_strdup_printf("%s/24", user->ip) : 880 NULL; 881 882 dnssearch = slirp_dnssearch(user->dnssearch); 883 884 /* all optional fields are initialized to "all bits zero" */ 885 886 net_init_slirp_configs(user->hostfwd, SLIRP_CFG_HOSTFWD); 887 net_init_slirp_configs(user->guestfwd, 0); 888 889 ret = net_slirp_init(peer, "user", name, user->q_restrict, 890 ipv4, vnet, user->host, 891 ipv6, user->ipv6_prefix, user->ipv6_prefixlen, 892 user->ipv6_host, user->hostname, user->tftp, 893 user->bootfile, user->dhcpstart, 894 user->dns, user->ipv6_dns, user->smb, 895 user->smbserver, dnssearch, user->domainname, errp); 896 897 while (slirp_configs) { 898 config = slirp_configs; 899 slirp_configs = config->next; 900 g_free(config); 901 } 902 903 g_free(vnet); 904 g_free(dnssearch); 905 906 return ret; 907 } 908