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