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 #include "net/slirp.h" 25 26 #include "config-host.h" 27 28 #ifndef _WIN32 29 #include <sys/wait.h> 30 #endif 31 #include "net.h" 32 #include "monitor.h" 33 #include "qemu_socket.h" 34 #include "slirp/libslirp.h" 35 36 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) 37 { 38 const char *p, *p1; 39 int len; 40 p = *pp; 41 p1 = strchr(p, sep); 42 if (!p1) 43 return -1; 44 len = p1 - p; 45 p1++; 46 if (buf_size > 0) { 47 if (len > buf_size - 1) 48 len = buf_size - 1; 49 memcpy(buf, p, len); 50 buf[len] = '\0'; 51 } 52 *pp = p1; 53 return 0; 54 } 55 56 /* slirp network adapter */ 57 58 #define SLIRP_CFG_HOSTFWD 1 59 #define SLIRP_CFG_LEGACY 2 60 61 struct slirp_config_str { 62 struct slirp_config_str *next; 63 int flags; 64 char str[1024]; 65 int legacy_format; 66 }; 67 68 typedef struct SlirpState { 69 VLANClientState nc; 70 QTAILQ_ENTRY(SlirpState) entry; 71 Slirp *slirp; 72 #ifndef _WIN32 73 char smb_dir[128]; 74 #endif 75 } SlirpState; 76 77 static struct slirp_config_str *slirp_configs; 78 const char *legacy_tftp_prefix; 79 const char *legacy_bootp_filename; 80 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks = 81 QTAILQ_HEAD_INITIALIZER(slirp_stacks); 82 83 static int slirp_hostfwd(SlirpState *s, const char *redir_str, 84 int legacy_format); 85 static int slirp_guestfwd(SlirpState *s, const char *config_str, 86 int legacy_format); 87 88 #ifndef _WIN32 89 static const char *legacy_smb_export; 90 91 static int slirp_smb(SlirpState *s, const char *exported_dir, 92 struct in_addr vserver_addr); 93 static void slirp_smb_cleanup(SlirpState *s); 94 #else 95 static inline void slirp_smb_cleanup(SlirpState *s) { } 96 #endif 97 98 int slirp_can_output(void *opaque) 99 { 100 SlirpState *s = opaque; 101 102 return qemu_can_send_packet(&s->nc); 103 } 104 105 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len) 106 { 107 SlirpState *s = opaque; 108 109 qemu_send_packet(&s->nc, pkt, pkt_len); 110 } 111 112 static ssize_t net_slirp_receive(VLANClientState *nc, const uint8_t *buf, size_t size) 113 { 114 SlirpState *s = DO_UPCAST(SlirpState, nc, nc); 115 116 slirp_input(s->slirp, buf, size); 117 118 return size; 119 } 120 121 static void net_slirp_cleanup(VLANClientState *nc) 122 { 123 SlirpState *s = DO_UPCAST(SlirpState, nc, nc); 124 125 slirp_cleanup(s->slirp); 126 slirp_smb_cleanup(s); 127 QTAILQ_REMOVE(&slirp_stacks, s, entry); 128 } 129 130 static NetClientInfo net_slirp_info = { 131 .type = NET_CLIENT_TYPE_USER, 132 .size = sizeof(SlirpState), 133 .receive = net_slirp_receive, 134 .cleanup = net_slirp_cleanup, 135 }; 136 137 static int net_slirp_init(VLANState *vlan, const char *model, 138 const char *name, int restricted, 139 const char *vnetwork, const char *vhost, 140 const char *vhostname, const char *tftp_export, 141 const char *bootfile, const char *vdhcp_start, 142 const char *vnameserver, const char *smb_export, 143 const char *vsmbserver) 144 { 145 /* default settings according to historic slirp */ 146 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */ 147 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */ 148 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */ 149 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */ 150 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */ 151 #ifndef _WIN32 152 struct in_addr smbsrv = { .s_addr = 0 }; 153 #endif 154 VLANClientState *nc; 155 SlirpState *s; 156 char buf[20]; 157 uint32_t addr; 158 int shift; 159 char *end; 160 struct slirp_config_str *config; 161 162 if (!tftp_export) { 163 tftp_export = legacy_tftp_prefix; 164 } 165 if (!bootfile) { 166 bootfile = legacy_bootp_filename; 167 } 168 169 if (vnetwork) { 170 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) { 171 if (!inet_aton(vnetwork, &net)) { 172 return -1; 173 } 174 addr = ntohl(net.s_addr); 175 if (!(addr & 0x80000000)) { 176 mask.s_addr = htonl(0xff000000); /* class A */ 177 } else if ((addr & 0xfff00000) == 0xac100000) { 178 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */ 179 } else if ((addr & 0xc0000000) == 0x80000000) { 180 mask.s_addr = htonl(0xffff0000); /* class B */ 181 } else if ((addr & 0xffff0000) == 0xc0a80000) { 182 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */ 183 } else if ((addr & 0xffff0000) == 0xc6120000) { 184 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */ 185 } else if ((addr & 0xe0000000) == 0xe0000000) { 186 mask.s_addr = htonl(0xffffff00); /* class C */ 187 } else { 188 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */ 189 } 190 } else { 191 if (!inet_aton(buf, &net)) { 192 return -1; 193 } 194 shift = strtol(vnetwork, &end, 10); 195 if (*end != '\0') { 196 if (!inet_aton(vnetwork, &mask)) { 197 return -1; 198 } 199 } else if (shift < 4 || shift > 32) { 200 return -1; 201 } else { 202 mask.s_addr = htonl(0xffffffff << (32 - shift)); 203 } 204 } 205 net.s_addr &= mask.s_addr; 206 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr); 207 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr); 208 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr); 209 } 210 211 if (vhost && !inet_aton(vhost, &host)) { 212 return -1; 213 } 214 if ((host.s_addr & mask.s_addr) != net.s_addr) { 215 return -1; 216 } 217 218 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) { 219 return -1; 220 } 221 if ((dhcp.s_addr & mask.s_addr) != net.s_addr || 222 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) { 223 return -1; 224 } 225 226 if (vnameserver && !inet_aton(vnameserver, &dns)) { 227 return -1; 228 } 229 if ((dns.s_addr & mask.s_addr) != net.s_addr || 230 dns.s_addr == host.s_addr) { 231 return -1; 232 } 233 234 #ifndef _WIN32 235 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) { 236 return -1; 237 } 238 #endif 239 240 nc = qemu_new_net_client(&net_slirp_info, vlan, NULL, model, name); 241 242 snprintf(nc->info_str, sizeof(nc->info_str), 243 "net=%s,restrict=%s", inet_ntoa(net), 244 restricted ? "on" : "off"); 245 246 s = DO_UPCAST(SlirpState, nc, nc); 247 248 s->slirp = slirp_init(restricted, net, mask, host, vhostname, 249 tftp_export, bootfile, dhcp, dns, s); 250 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry); 251 252 for (config = slirp_configs; config; config = config->next) { 253 if (config->flags & SLIRP_CFG_HOSTFWD) { 254 if (slirp_hostfwd(s, config->str, 255 config->flags & SLIRP_CFG_LEGACY) < 0) 256 goto error; 257 } else { 258 if (slirp_guestfwd(s, config->str, 259 config->flags & SLIRP_CFG_LEGACY) < 0) 260 goto error; 261 } 262 } 263 #ifndef _WIN32 264 if (!smb_export) { 265 smb_export = legacy_smb_export; 266 } 267 if (smb_export) { 268 if (slirp_smb(s, smb_export, smbsrv) < 0) 269 goto error; 270 } 271 #endif 272 273 return 0; 274 275 error: 276 qemu_del_vlan_client(nc); 277 return -1; 278 } 279 280 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan, 281 const char *stack) 282 { 283 284 if (vlan) { 285 VLANClientState *nc; 286 nc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack); 287 if (!nc) { 288 return NULL; 289 } 290 if (strcmp(nc->model, "user")) { 291 monitor_printf(mon, "invalid device specified\n"); 292 return NULL; 293 } 294 return DO_UPCAST(SlirpState, nc, nc); 295 } else { 296 if (QTAILQ_EMPTY(&slirp_stacks)) { 297 monitor_printf(mon, "user mode network stack not in use\n"); 298 return NULL; 299 } 300 return QTAILQ_FIRST(&slirp_stacks); 301 } 302 } 303 304 void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict) 305 { 306 struct in_addr host_addr = { .s_addr = INADDR_ANY }; 307 int host_port; 308 char buf[256] = ""; 309 const char *src_str, *p; 310 SlirpState *s; 311 int is_udp = 0; 312 int err; 313 const char *arg1 = qdict_get_str(qdict, "arg1"); 314 const char *arg2 = qdict_get_try_str(qdict, "arg2"); 315 const char *arg3 = qdict_get_try_str(qdict, "arg3"); 316 317 if (arg2) { 318 s = slirp_lookup(mon, arg1, arg2); 319 src_str = arg3; 320 } else { 321 s = slirp_lookup(mon, NULL, NULL); 322 src_str = arg1; 323 } 324 if (!s) { 325 return; 326 } 327 328 if (!src_str || !src_str[0]) 329 goto fail_syntax; 330 331 p = src_str; 332 get_str_sep(buf, sizeof(buf), &p, ':'); 333 334 if (!strcmp(buf, "tcp") || buf[0] == '\0') { 335 is_udp = 0; 336 } else if (!strcmp(buf, "udp")) { 337 is_udp = 1; 338 } else { 339 goto fail_syntax; 340 } 341 342 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 343 goto fail_syntax; 344 } 345 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { 346 goto fail_syntax; 347 } 348 349 host_port = atoi(p); 350 351 err = slirp_remove_hostfwd(QTAILQ_FIRST(&slirp_stacks)->slirp, is_udp, 352 host_addr, host_port); 353 354 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str, 355 err ? "removed" : "not found"); 356 return; 357 358 fail_syntax: 359 monitor_printf(mon, "invalid format\n"); 360 } 361 362 static int slirp_hostfwd(SlirpState *s, const char *redir_str, 363 int legacy_format) 364 { 365 struct in_addr host_addr = { .s_addr = INADDR_ANY }; 366 struct in_addr guest_addr = { .s_addr = 0 }; 367 int host_port, guest_port; 368 const char *p; 369 char buf[256]; 370 int is_udp; 371 char *end; 372 373 p = redir_str; 374 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 375 goto fail_syntax; 376 } 377 if (!strcmp(buf, "tcp") || buf[0] == '\0') { 378 is_udp = 0; 379 } else if (!strcmp(buf, "udp")) { 380 is_udp = 1; 381 } else { 382 goto fail_syntax; 383 } 384 385 if (!legacy_format) { 386 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 387 goto fail_syntax; 388 } 389 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { 390 goto fail_syntax; 391 } 392 } 393 394 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) { 395 goto fail_syntax; 396 } 397 host_port = strtol(buf, &end, 0); 398 if (*end != '\0' || host_port < 1 || host_port > 65535) { 399 goto fail_syntax; 400 } 401 402 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 403 goto fail_syntax; 404 } 405 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) { 406 goto fail_syntax; 407 } 408 409 guest_port = strtol(p, &end, 0); 410 if (*end != '\0' || guest_port < 1 || guest_port > 65535) { 411 goto fail_syntax; 412 } 413 414 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr, 415 guest_port) < 0) { 416 error_report("could not set up host forwarding rule '%s'", 417 redir_str); 418 return -1; 419 } 420 return 0; 421 422 fail_syntax: 423 error_report("invalid host forwarding rule '%s'", redir_str); 424 return -1; 425 } 426 427 void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict) 428 { 429 const char *redir_str; 430 SlirpState *s; 431 const char *arg1 = qdict_get_str(qdict, "arg1"); 432 const char *arg2 = qdict_get_try_str(qdict, "arg2"); 433 const char *arg3 = qdict_get_try_str(qdict, "arg3"); 434 435 if (arg2) { 436 s = slirp_lookup(mon, arg1, arg2); 437 redir_str = arg3; 438 } else { 439 s = slirp_lookup(mon, NULL, NULL); 440 redir_str = arg1; 441 } 442 if (s) { 443 slirp_hostfwd(s, redir_str, 0); 444 } 445 446 } 447 448 int net_slirp_redir(const char *redir_str) 449 { 450 struct slirp_config_str *config; 451 452 if (QTAILQ_EMPTY(&slirp_stacks)) { 453 config = g_malloc(sizeof(*config)); 454 pstrcpy(config->str, sizeof(config->str), redir_str); 455 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY; 456 config->next = slirp_configs; 457 slirp_configs = config; 458 return 0; 459 } 460 461 return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1); 462 } 463 464 #ifndef _WIN32 465 466 /* automatic user mode samba server configuration */ 467 static void slirp_smb_cleanup(SlirpState *s) 468 { 469 char cmd[128]; 470 int ret; 471 472 if (s->smb_dir[0] != '\0') { 473 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir); 474 ret = system(cmd); 475 if (ret == -1 || !WIFEXITED(ret)) { 476 error_report("'%s' failed.", cmd); 477 } else if (WEXITSTATUS(ret)) { 478 error_report("'%s' failed. Error code: %d", 479 cmd, WEXITSTATUS(ret)); 480 } 481 s->smb_dir[0] = '\0'; 482 } 483 } 484 485 static int slirp_smb(SlirpState* s, const char *exported_dir, 486 struct in_addr vserver_addr) 487 { 488 static int instance; 489 char smb_conf[128]; 490 char smb_cmdline[128]; 491 FILE *f; 492 493 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d", 494 (long)getpid(), instance++); 495 if (mkdir(s->smb_dir, 0700) < 0) { 496 error_report("could not create samba server dir '%s'", s->smb_dir); 497 return -1; 498 } 499 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf"); 500 501 f = fopen(smb_conf, "w"); 502 if (!f) { 503 slirp_smb_cleanup(s); 504 error_report("could not create samba server configuration file '%s'", 505 smb_conf); 506 return -1; 507 } 508 fprintf(f, 509 "[global]\n" 510 "private dir=%s\n" 511 "smb ports=0\n" 512 "socket address=127.0.0.1\n" 513 "pid directory=%s\n" 514 "lock directory=%s\n" 515 "log file=%s/log.smbd\n" 516 "smb passwd file=%s/smbpasswd\n" 517 "security = share\n" 518 "[qemu]\n" 519 "path=%s\n" 520 "read only=no\n" 521 "guest ok=yes\n", 522 s->smb_dir, 523 s->smb_dir, 524 s->smb_dir, 525 s->smb_dir, 526 s->smb_dir, 527 exported_dir 528 ); 529 fclose(f); 530 531 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s", 532 CONFIG_SMBD_COMMAND, smb_conf); 533 534 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) { 535 slirp_smb_cleanup(s); 536 error_report("conflicting/invalid smbserver address"); 537 return -1; 538 } 539 return 0; 540 } 541 542 /* automatic user mode samba server configuration (legacy interface) */ 543 int net_slirp_smb(const char *exported_dir) 544 { 545 struct in_addr vserver_addr = { .s_addr = 0 }; 546 547 if (legacy_smb_export) { 548 fprintf(stderr, "-smb given twice\n"); 549 return -1; 550 } 551 legacy_smb_export = exported_dir; 552 if (!QTAILQ_EMPTY(&slirp_stacks)) { 553 return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir, 554 vserver_addr); 555 } 556 return 0; 557 } 558 559 #endif /* !defined(_WIN32) */ 560 561 struct GuestFwd { 562 CharDriverState *hd; 563 struct in_addr server; 564 int port; 565 Slirp *slirp; 566 }; 567 568 static int guestfwd_can_read(void *opaque) 569 { 570 struct GuestFwd *fwd = opaque; 571 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port); 572 } 573 574 static void guestfwd_read(void *opaque, const uint8_t *buf, int size) 575 { 576 struct GuestFwd *fwd = opaque; 577 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size); 578 } 579 580 static int slirp_guestfwd(SlirpState *s, const char *config_str, 581 int legacy_format) 582 { 583 struct in_addr server = { .s_addr = 0 }; 584 struct GuestFwd *fwd; 585 const char *p; 586 char buf[128]; 587 char *end; 588 int port; 589 590 p = config_str; 591 if (legacy_format) { 592 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 593 goto fail_syntax; 594 } 595 } else { 596 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 597 goto fail_syntax; 598 } 599 if (strcmp(buf, "tcp") && buf[0] != '\0') { 600 goto fail_syntax; 601 } 602 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 603 goto fail_syntax; 604 } 605 if (buf[0] != '\0' && !inet_aton(buf, &server)) { 606 goto fail_syntax; 607 } 608 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { 609 goto fail_syntax; 610 } 611 } 612 port = strtol(buf, &end, 10); 613 if (*end != '\0' || port < 1 || port > 65535) { 614 goto fail_syntax; 615 } 616 617 fwd = g_malloc(sizeof(struct GuestFwd)); 618 snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port); 619 fwd->hd = qemu_chr_new(buf, p, NULL); 620 if (!fwd->hd) { 621 error_report("could not open guest forwarding device '%s'", buf); 622 g_free(fwd); 623 return -1; 624 } 625 626 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) { 627 error_report("conflicting/invalid host:port in guest forwarding " 628 "rule '%s'", config_str); 629 g_free(fwd); 630 return -1; 631 } 632 fwd->server = server; 633 fwd->port = port; 634 fwd->slirp = s->slirp; 635 636 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read, 637 NULL, fwd); 638 return 0; 639 640 fail_syntax: 641 error_report("invalid guest forwarding rule '%s'", config_str); 642 return -1; 643 } 644 645 void do_info_usernet(Monitor *mon) 646 { 647 SlirpState *s; 648 649 QTAILQ_FOREACH(s, &slirp_stacks, entry) { 650 monitor_printf(mon, "VLAN %d (%s):\n", 651 s->nc.vlan ? s->nc.vlan->id : -1, 652 s->nc.name); 653 slirp_connection_info(s->slirp, mon); 654 } 655 } 656 657 static int net_init_slirp_configs(const char *name, const char *value, void *opaque) 658 { 659 struct slirp_config_str *config; 660 661 if (strcmp(name, "hostfwd") != 0 && strcmp(name, "guestfwd") != 0) { 662 return 0; 663 } 664 665 config = g_malloc0(sizeof(*config)); 666 667 pstrcpy(config->str, sizeof(config->str), value); 668 669 if (!strcmp(name, "hostfwd")) { 670 config->flags = SLIRP_CFG_HOSTFWD; 671 } 672 673 config->next = slirp_configs; 674 slirp_configs = config; 675 676 return 0; 677 } 678 679 int net_init_slirp(QemuOpts *opts, 680 Monitor *mon, 681 const char *name, 682 VLANState *vlan) 683 { 684 struct slirp_config_str *config; 685 const char *vhost; 686 const char *vhostname; 687 const char *vdhcp_start; 688 const char *vnamesrv; 689 const char *tftp_export; 690 const char *bootfile; 691 const char *smb_export; 692 const char *vsmbsrv; 693 const char *restrict_opt; 694 char *vnet = NULL; 695 int restricted = 0; 696 int ret; 697 698 vhost = qemu_opt_get(opts, "host"); 699 vhostname = qemu_opt_get(opts, "hostname"); 700 vdhcp_start = qemu_opt_get(opts, "dhcpstart"); 701 vnamesrv = qemu_opt_get(opts, "dns"); 702 tftp_export = qemu_opt_get(opts, "tftp"); 703 bootfile = qemu_opt_get(opts, "bootfile"); 704 smb_export = qemu_opt_get(opts, "smb"); 705 vsmbsrv = qemu_opt_get(opts, "smbserver"); 706 707 restrict_opt = qemu_opt_get(opts, "restrict"); 708 if (restrict_opt) { 709 if (!strcmp(restrict_opt, "on") || 710 !strcmp(restrict_opt, "yes") || !strcmp(restrict_opt, "y")) { 711 restricted = 1; 712 } else if (strcmp(restrict_opt, "off") && 713 strcmp(restrict_opt, "no") && strcmp(restrict_opt, "n")) { 714 error_report("invalid option: 'restrict=%s'", restrict_opt); 715 return -1; 716 } 717 } 718 719 if (qemu_opt_get(opts, "ip")) { 720 const char *ip = qemu_opt_get(opts, "ip"); 721 int l = strlen(ip) + strlen("/24") + 1; 722 723 vnet = g_malloc(l); 724 725 /* emulate legacy ip= parameter */ 726 pstrcpy(vnet, l, ip); 727 pstrcat(vnet, l, "/24"); 728 } 729 730 if (qemu_opt_get(opts, "net")) { 731 if (vnet) { 732 g_free(vnet); 733 } 734 vnet = g_strdup(qemu_opt_get(opts, "net")); 735 } 736 737 qemu_opt_foreach(opts, net_init_slirp_configs, NULL, 0); 738 739 ret = net_slirp_init(vlan, "user", name, restricted, vnet, vhost, 740 vhostname, tftp_export, bootfile, vdhcp_start, 741 vnamesrv, smb_export, vsmbsrv); 742 743 while (slirp_configs) { 744 config = slirp_configs; 745 slirp_configs = config->next; 746 g_free(config); 747 } 748 749 g_free(vnet); 750 751 return ret; 752 } 753 754 int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret) 755 { 756 if (strcmp(opts_list->name, "net") != 0 || 757 strncmp(optarg, "channel,", strlen("channel,")) != 0) { 758 return 0; 759 } 760 761 /* handle legacy -net channel,port:chr */ 762 optarg += strlen("channel,"); 763 764 if (QTAILQ_EMPTY(&slirp_stacks)) { 765 struct slirp_config_str *config; 766 767 config = g_malloc(sizeof(*config)); 768 pstrcpy(config->str, sizeof(config->str), optarg); 769 config->flags = SLIRP_CFG_LEGACY; 770 config->next = slirp_configs; 771 slirp_configs = config; 772 *ret = 0; 773 } else { 774 *ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1); 775 } 776 777 return 1; 778 } 779 780