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 "qemu/osdep.h" 25 #include "net/slirp.h" 26 27 28 #ifndef _WIN32 29 #include <pwd.h> 30 #include <sys/wait.h> 31 #endif 32 #include "net/net.h" 33 #include "clients.h" 34 #include "hub.h" 35 #include "monitor/monitor.h" 36 #include "qemu/error-report.h" 37 #include "qemu/sockets.h" 38 #include "slirp/libslirp.h" 39 #include "sysemu/char.h" 40 41 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) 42 { 43 const char *p, *p1; 44 int len; 45 p = *pp; 46 p1 = strchr(p, sep); 47 if (!p1) 48 return -1; 49 len = p1 - p; 50 p1++; 51 if (buf_size > 0) { 52 if (len > buf_size - 1) 53 len = buf_size - 1; 54 memcpy(buf, p, len); 55 buf[len] = '\0'; 56 } 57 *pp = p1; 58 return 0; 59 } 60 61 /* slirp network adapter */ 62 63 #define SLIRP_CFG_HOSTFWD 1 64 #define SLIRP_CFG_LEGACY 2 65 66 struct slirp_config_str { 67 struct slirp_config_str *next; 68 int flags; 69 char str[1024]; 70 int legacy_format; 71 }; 72 73 typedef struct SlirpState { 74 NetClientState nc; 75 QTAILQ_ENTRY(SlirpState) entry; 76 Slirp *slirp; 77 #ifndef _WIN32 78 char smb_dir[128]; 79 #endif 80 } SlirpState; 81 82 static struct slirp_config_str *slirp_configs; 83 const char *legacy_tftp_prefix; 84 const char *legacy_bootp_filename; 85 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks = 86 QTAILQ_HEAD_INITIALIZER(slirp_stacks); 87 88 static int slirp_hostfwd(SlirpState *s, const char *redir_str, 89 int legacy_format); 90 static int slirp_guestfwd(SlirpState *s, const char *config_str, 91 int legacy_format); 92 93 #ifndef _WIN32 94 static const char *legacy_smb_export; 95 96 static int slirp_smb(SlirpState *s, const char *exported_dir, 97 struct in_addr vserver_addr); 98 static void slirp_smb_cleanup(SlirpState *s); 99 #else 100 static inline void slirp_smb_cleanup(SlirpState *s) { } 101 #endif 102 103 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len) 104 { 105 SlirpState *s = opaque; 106 107 qemu_send_packet(&s->nc, pkt, pkt_len); 108 } 109 110 static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size) 111 { 112 SlirpState *s = DO_UPCAST(SlirpState, nc, nc); 113 114 slirp_input(s->slirp, buf, size); 115 116 return size; 117 } 118 119 static void net_slirp_cleanup(NetClientState *nc) 120 { 121 SlirpState *s = DO_UPCAST(SlirpState, nc, nc); 122 123 slirp_cleanup(s->slirp); 124 slirp_smb_cleanup(s); 125 QTAILQ_REMOVE(&slirp_stacks, s, entry); 126 } 127 128 static NetClientInfo net_slirp_info = { 129 .type = NET_CLIENT_OPTIONS_KIND_USER, 130 .size = sizeof(SlirpState), 131 .receive = net_slirp_receive, 132 .cleanup = net_slirp_cleanup, 133 }; 134 135 static int net_slirp_init(NetClientState *peer, const char *model, 136 const char *name, int restricted, 137 const char *vnetwork, const char *vhost, 138 const char *vhostname, const char *tftp_export, 139 const char *bootfile, const char *vdhcp_start, 140 const char *vnameserver, const char *smb_export, 141 const char *vsmbserver, const char **dnssearch) 142 { 143 /* default settings according to historic slirp */ 144 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */ 145 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */ 146 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */ 147 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */ 148 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */ 149 #ifndef _WIN32 150 struct in_addr smbsrv = { .s_addr = 0 }; 151 #endif 152 NetClientState *nc; 153 SlirpState *s; 154 char buf[20]; 155 uint32_t addr; 156 int shift; 157 char *end; 158 struct slirp_config_str *config; 159 160 if (!tftp_export) { 161 tftp_export = legacy_tftp_prefix; 162 } 163 if (!bootfile) { 164 bootfile = legacy_bootp_filename; 165 } 166 167 if (vnetwork) { 168 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) { 169 if (!inet_aton(vnetwork, &net)) { 170 return -1; 171 } 172 addr = ntohl(net.s_addr); 173 if (!(addr & 0x80000000)) { 174 mask.s_addr = htonl(0xff000000); /* class A */ 175 } else if ((addr & 0xfff00000) == 0xac100000) { 176 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */ 177 } else if ((addr & 0xc0000000) == 0x80000000) { 178 mask.s_addr = htonl(0xffff0000); /* class B */ 179 } else if ((addr & 0xffff0000) == 0xc0a80000) { 180 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */ 181 } else if ((addr & 0xffff0000) == 0xc6120000) { 182 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */ 183 } else if ((addr & 0xe0000000) == 0xe0000000) { 184 mask.s_addr = htonl(0xffffff00); /* class C */ 185 } else { 186 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */ 187 } 188 } else { 189 if (!inet_aton(buf, &net)) { 190 return -1; 191 } 192 shift = strtol(vnetwork, &end, 10); 193 if (*end != '\0') { 194 if (!inet_aton(vnetwork, &mask)) { 195 return -1; 196 } 197 } else if (shift < 4 || shift > 32) { 198 return -1; 199 } else { 200 mask.s_addr = htonl(0xffffffff << (32 - shift)); 201 } 202 } 203 net.s_addr &= mask.s_addr; 204 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr); 205 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr); 206 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr); 207 } 208 209 if (vhost && !inet_aton(vhost, &host)) { 210 return -1; 211 } 212 if ((host.s_addr & mask.s_addr) != net.s_addr) { 213 return -1; 214 } 215 216 if (vnameserver && !inet_aton(vnameserver, &dns)) { 217 return -1; 218 } 219 if ((dns.s_addr & mask.s_addr) != net.s_addr || 220 dns.s_addr == host.s_addr) { 221 return -1; 222 } 223 224 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) { 225 return -1; 226 } 227 if ((dhcp.s_addr & mask.s_addr) != net.s_addr || 228 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) { 229 return -1; 230 } 231 232 #ifndef _WIN32 233 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) { 234 return -1; 235 } 236 #endif 237 238 nc = qemu_new_net_client(&net_slirp_info, peer, model, name); 239 240 snprintf(nc->info_str, sizeof(nc->info_str), 241 "net=%s,restrict=%s", inet_ntoa(net), 242 restricted ? "on" : "off"); 243 244 s = DO_UPCAST(SlirpState, nc, nc); 245 246 s->slirp = slirp_init(restricted, net, mask, host, vhostname, 247 tftp_export, bootfile, dhcp, dns, dnssearch, s); 248 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry); 249 250 for (config = slirp_configs; config; config = config->next) { 251 if (config->flags & SLIRP_CFG_HOSTFWD) { 252 if (slirp_hostfwd(s, config->str, 253 config->flags & SLIRP_CFG_LEGACY) < 0) 254 goto error; 255 } else { 256 if (slirp_guestfwd(s, config->str, 257 config->flags & SLIRP_CFG_LEGACY) < 0) 258 goto error; 259 } 260 } 261 #ifndef _WIN32 262 if (!smb_export) { 263 smb_export = legacy_smb_export; 264 } 265 if (smb_export) { 266 if (slirp_smb(s, smb_export, smbsrv) < 0) 267 goto error; 268 } 269 #endif 270 271 return 0; 272 273 error: 274 qemu_del_net_client(nc); 275 return -1; 276 } 277 278 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan, 279 const char *stack) 280 { 281 282 if (vlan) { 283 NetClientState *nc; 284 nc = net_hub_find_client_by_name(strtol(vlan, NULL, 0), stack); 285 if (!nc) { 286 monitor_printf(mon, "unrecognized (vlan-id, stackname) pair\n"); 287 return NULL; 288 } 289 if (strcmp(nc->model, "user")) { 290 monitor_printf(mon, "invalid device specified\n"); 291 return NULL; 292 } 293 return DO_UPCAST(SlirpState, nc, nc); 294 } else { 295 if (QTAILQ_EMPTY(&slirp_stacks)) { 296 monitor_printf(mon, "user mode network stack not in use\n"); 297 return NULL; 298 } 299 return QTAILQ_FIRST(&slirp_stacks); 300 } 301 } 302 303 void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict) 304 { 305 struct in_addr host_addr = { .s_addr = INADDR_ANY }; 306 int host_port; 307 char buf[256]; 308 const char *src_str, *p; 309 SlirpState *s; 310 int is_udp = 0; 311 int err; 312 const char *arg1 = qdict_get_str(qdict, "arg1"); 313 const char *arg2 = qdict_get_try_str(qdict, "arg2"); 314 const char *arg3 = qdict_get_try_str(qdict, "arg3"); 315 316 if (arg2) { 317 s = slirp_lookup(mon, arg1, arg2); 318 src_str = arg3; 319 } else { 320 s = slirp_lookup(mon, NULL, NULL); 321 src_str = arg1; 322 } 323 if (!s) { 324 return; 325 } 326 327 p = src_str; 328 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 329 goto fail_syntax; 330 } 331 332 if (!strcmp(buf, "tcp") || buf[0] == '\0') { 333 is_udp = 0; 334 } else if (!strcmp(buf, "udp")) { 335 is_udp = 1; 336 } else { 337 goto fail_syntax; 338 } 339 340 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 341 goto fail_syntax; 342 } 343 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { 344 goto fail_syntax; 345 } 346 347 host_port = atoi(p); 348 349 err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port); 350 351 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str, 352 err ? "not found" : "removed"); 353 return; 354 355 fail_syntax: 356 monitor_printf(mon, "invalid format\n"); 357 } 358 359 static int slirp_hostfwd(SlirpState *s, const char *redir_str, 360 int legacy_format) 361 { 362 struct in_addr host_addr = { .s_addr = INADDR_ANY }; 363 struct in_addr guest_addr = { .s_addr = 0 }; 364 int host_port, guest_port; 365 const char *p; 366 char buf[256]; 367 int is_udp; 368 char *end; 369 370 p = redir_str; 371 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 372 goto fail_syntax; 373 } 374 if (!strcmp(buf, "tcp") || buf[0] == '\0') { 375 is_udp = 0; 376 } else if (!strcmp(buf, "udp")) { 377 is_udp = 1; 378 } else { 379 goto fail_syntax; 380 } 381 382 if (!legacy_format) { 383 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 384 goto fail_syntax; 385 } 386 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { 387 goto fail_syntax; 388 } 389 } 390 391 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) { 392 goto fail_syntax; 393 } 394 host_port = strtol(buf, &end, 0); 395 if (*end != '\0' || host_port < 1 || host_port > 65535) { 396 goto fail_syntax; 397 } 398 399 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 400 goto fail_syntax; 401 } 402 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) { 403 goto fail_syntax; 404 } 405 406 guest_port = strtol(p, &end, 0); 407 if (*end != '\0' || guest_port < 1 || guest_port > 65535) { 408 goto fail_syntax; 409 } 410 411 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr, 412 guest_port) < 0) { 413 error_report("could not set up host forwarding rule '%s'", 414 redir_str); 415 return -1; 416 } 417 return 0; 418 419 fail_syntax: 420 error_report("invalid host forwarding rule '%s'", redir_str); 421 return -1; 422 } 423 424 void hmp_hostfwd_add(Monitor *mon, const QDict *qdict) 425 { 426 const char *redir_str; 427 SlirpState *s; 428 const char *arg1 = qdict_get_str(qdict, "arg1"); 429 const char *arg2 = qdict_get_try_str(qdict, "arg2"); 430 const char *arg3 = qdict_get_try_str(qdict, "arg3"); 431 432 if (arg2) { 433 s = slirp_lookup(mon, arg1, arg2); 434 redir_str = arg3; 435 } else { 436 s = slirp_lookup(mon, NULL, NULL); 437 redir_str = arg1; 438 } 439 if (s) { 440 slirp_hostfwd(s, redir_str, 0); 441 } 442 443 } 444 445 int net_slirp_redir(const char *redir_str) 446 { 447 struct slirp_config_str *config; 448 449 if (QTAILQ_EMPTY(&slirp_stacks)) { 450 config = g_malloc(sizeof(*config)); 451 pstrcpy(config->str, sizeof(config->str), redir_str); 452 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY; 453 config->next = slirp_configs; 454 slirp_configs = config; 455 return 0; 456 } 457 458 return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1); 459 } 460 461 #ifndef _WIN32 462 463 /* automatic user mode samba server configuration */ 464 static void slirp_smb_cleanup(SlirpState *s) 465 { 466 char cmd[128]; 467 int ret; 468 469 if (s->smb_dir[0] != '\0') { 470 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir); 471 ret = system(cmd); 472 if (ret == -1 || !WIFEXITED(ret)) { 473 error_report("'%s' failed.", cmd); 474 } else if (WEXITSTATUS(ret)) { 475 error_report("'%s' failed. Error code: %d", 476 cmd, WEXITSTATUS(ret)); 477 } 478 s->smb_dir[0] = '\0'; 479 } 480 } 481 482 static int slirp_smb(SlirpState* s, const char *exported_dir, 483 struct in_addr vserver_addr) 484 { 485 char smb_conf[128]; 486 char smb_cmdline[128]; 487 struct passwd *passwd; 488 FILE *f; 489 490 passwd = getpwuid(geteuid()); 491 if (!passwd) { 492 error_report("failed to retrieve user name"); 493 return -1; 494 } 495 496 if (access(CONFIG_SMBD_COMMAND, F_OK)) { 497 error_report("could not find '%s', please install it", 498 CONFIG_SMBD_COMMAND); 499 return -1; 500 } 501 502 if (access(exported_dir, R_OK | X_OK)) { 503 error_report("error accessing shared directory '%s': %s", 504 exported_dir, strerror(errno)); 505 return -1; 506 } 507 508 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.XXXXXX"); 509 if (!mkdtemp(s->smb_dir)) { 510 error_report("could not create samba server dir '%s'", s->smb_dir); 511 s->smb_dir[0] = 0; 512 return -1; 513 } 514 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf"); 515 516 f = fopen(smb_conf, "w"); 517 if (!f) { 518 slirp_smb_cleanup(s); 519 error_report("could not create samba server configuration file '%s'", 520 smb_conf); 521 return -1; 522 } 523 fprintf(f, 524 "[global]\n" 525 "private dir=%s\n" 526 "interfaces=127.0.0.1\n" 527 "bind interfaces only=yes\n" 528 "pid directory=%s\n" 529 "lock directory=%s\n" 530 "state directory=%s\n" 531 "cache directory=%s\n" 532 "ncalrpc dir=%s/ncalrpc\n" 533 "log file=%s/log.smbd\n" 534 "smb passwd file=%s/smbpasswd\n" 535 "security = user\n" 536 "map to guest = Bad User\n" 537 "load printers = no\n" 538 "printing = bsd\n" 539 "disable spoolss = yes\n" 540 "usershare max shares = 0\n" 541 "[qemu]\n" 542 "path=%s\n" 543 "read only=no\n" 544 "guest ok=yes\n" 545 "force user=%s\n", 546 s->smb_dir, 547 s->smb_dir, 548 s->smb_dir, 549 s->smb_dir, 550 s->smb_dir, 551 s->smb_dir, 552 s->smb_dir, 553 s->smb_dir, 554 exported_dir, 555 passwd->pw_name 556 ); 557 fclose(f); 558 559 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -l %s -s %s", 560 CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf); 561 562 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0 || 563 slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 445) < 0) { 564 slirp_smb_cleanup(s); 565 error_report("conflicting/invalid smbserver address"); 566 return -1; 567 } 568 return 0; 569 } 570 571 /* automatic user mode samba server configuration (legacy interface) */ 572 int net_slirp_smb(const char *exported_dir) 573 { 574 struct in_addr vserver_addr = { .s_addr = 0 }; 575 576 if (legacy_smb_export) { 577 fprintf(stderr, "-smb given twice\n"); 578 return -1; 579 } 580 legacy_smb_export = exported_dir; 581 if (!QTAILQ_EMPTY(&slirp_stacks)) { 582 return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir, 583 vserver_addr); 584 } 585 return 0; 586 } 587 588 #endif /* !defined(_WIN32) */ 589 590 struct GuestFwd { 591 CharDriverState *hd; 592 struct in_addr server; 593 int port; 594 Slirp *slirp; 595 }; 596 597 static int guestfwd_can_read(void *opaque) 598 { 599 struct GuestFwd *fwd = opaque; 600 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port); 601 } 602 603 static void guestfwd_read(void *opaque, const uint8_t *buf, int size) 604 { 605 struct GuestFwd *fwd = opaque; 606 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size); 607 } 608 609 static int slirp_guestfwd(SlirpState *s, const char *config_str, 610 int legacy_format) 611 { 612 struct in_addr server = { .s_addr = 0 }; 613 struct GuestFwd *fwd; 614 const char *p; 615 char buf[128]; 616 char *end; 617 int port; 618 619 p = config_str; 620 if (legacy_format) { 621 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 622 goto fail_syntax; 623 } 624 } else { 625 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 626 goto fail_syntax; 627 } 628 if (strcmp(buf, "tcp") && buf[0] != '\0') { 629 goto fail_syntax; 630 } 631 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 632 goto fail_syntax; 633 } 634 if (buf[0] != '\0' && !inet_aton(buf, &server)) { 635 goto fail_syntax; 636 } 637 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { 638 goto fail_syntax; 639 } 640 } 641 port = strtol(buf, &end, 10); 642 if (*end != '\0' || port < 1 || port > 65535) { 643 goto fail_syntax; 644 } 645 646 snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port); 647 648 if ((strlen(p) > 4) && !strncmp(p, "cmd:", 4)) { 649 if (slirp_add_exec(s->slirp, 0, &p[4], &server, port) < 0) { 650 error_report("conflicting/invalid host:port in guest forwarding " 651 "rule '%s'", config_str); 652 return -1; 653 } 654 } else { 655 fwd = g_new(struct GuestFwd, 1); 656 fwd->hd = qemu_chr_new(buf, p, NULL); 657 if (!fwd->hd) { 658 error_report("could not open guest forwarding device '%s'", buf); 659 g_free(fwd); 660 return -1; 661 } 662 663 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) { 664 error_report("conflicting/invalid host:port in guest forwarding " 665 "rule '%s'", config_str); 666 g_free(fwd); 667 return -1; 668 } 669 fwd->server = server; 670 fwd->port = port; 671 fwd->slirp = s->slirp; 672 673 qemu_chr_fe_claim_no_fail(fwd->hd); 674 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read, 675 NULL, fwd); 676 } 677 return 0; 678 679 fail_syntax: 680 error_report("invalid guest forwarding rule '%s'", config_str); 681 return -1; 682 } 683 684 void hmp_info_usernet(Monitor *mon, const QDict *qdict) 685 { 686 SlirpState *s; 687 688 QTAILQ_FOREACH(s, &slirp_stacks, entry) { 689 int id; 690 bool got_vlan_id = net_hub_id_for_client(&s->nc, &id) == 0; 691 monitor_printf(mon, "VLAN %d (%s):\n", 692 got_vlan_id ? id : -1, 693 s->nc.name); 694 slirp_connection_info(s->slirp, mon); 695 } 696 } 697 698 static void 699 net_init_slirp_configs(const StringList *fwd, int flags) 700 { 701 while (fwd) { 702 struct slirp_config_str *config; 703 704 config = g_malloc0(sizeof(*config)); 705 pstrcpy(config->str, sizeof(config->str), fwd->value->str); 706 config->flags = flags; 707 config->next = slirp_configs; 708 slirp_configs = config; 709 710 fwd = fwd->next; 711 } 712 } 713 714 static const char **slirp_dnssearch(const StringList *dnsname) 715 { 716 const StringList *c = dnsname; 717 size_t i = 0, num_opts = 0; 718 const char **ret; 719 720 while (c) { 721 num_opts++; 722 c = c->next; 723 } 724 725 if (num_opts == 0) { 726 return NULL; 727 } 728 729 ret = g_malloc((num_opts + 1) * sizeof(*ret)); 730 c = dnsname; 731 while (c) { 732 ret[i++] = c->value->str; 733 c = c->next; 734 } 735 ret[i] = NULL; 736 return ret; 737 } 738 739 int net_init_slirp(const NetClientOptions *opts, const char *name, 740 NetClientState *peer, Error **errp) 741 { 742 /* FIXME error_setg(errp, ...) on failure */ 743 struct slirp_config_str *config; 744 char *vnet; 745 int ret; 746 const NetdevUserOptions *user; 747 const char **dnssearch; 748 749 assert(opts->type == NET_CLIENT_OPTIONS_KIND_USER); 750 user = opts->u.user; 751 752 vnet = user->has_net ? g_strdup(user->net) : 753 user->has_ip ? g_strdup_printf("%s/24", user->ip) : 754 NULL; 755 756 dnssearch = slirp_dnssearch(user->dnssearch); 757 758 /* all optional fields are initialized to "all bits zero" */ 759 760 net_init_slirp_configs(user->hostfwd, SLIRP_CFG_HOSTFWD); 761 net_init_slirp_configs(user->guestfwd, 0); 762 763 ret = net_slirp_init(peer, "user", name, user->q_restrict, vnet, 764 user->host, user->hostname, user->tftp, 765 user->bootfile, user->dhcpstart, user->dns, user->smb, 766 user->smbserver, dnssearch); 767 768 while (slirp_configs) { 769 config = slirp_configs; 770 slirp_configs = config->next; 771 g_free(config); 772 } 773 774 g_free(vnet); 775 g_free(dnssearch); 776 777 return ret; 778 } 779 780 int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret) 781 { 782 if (strcmp(opts_list->name, "net") != 0 || 783 strncmp(optarg, "channel,", strlen("channel,")) != 0) { 784 return 0; 785 } 786 787 error_report("The '-net channel' option is deprecated. " 788 "Please use '-netdev user,guestfwd=...' instead."); 789 790 /* handle legacy -net channel,port:chr */ 791 optarg += strlen("channel,"); 792 793 if (QTAILQ_EMPTY(&slirp_stacks)) { 794 struct slirp_config_str *config; 795 796 config = g_malloc(sizeof(*config)); 797 pstrcpy(config->str, sizeof(config->str), optarg); 798 config->flags = SLIRP_CFG_LEGACY; 799 config->next = slirp_configs; 800 slirp_configs = config; 801 *ret = 0; 802 } else { 803 *ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1); 804 } 805 806 return 1; 807 } 808 809