| 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 "qemu/log.h" |
| 27 | #include "net/slirp.h" |
| 28 | |
| 29 | |
| 30 | #if defined(CONFIG_SMBD_COMMAND) |
| 31 | #include <pwd.h> |
| 32 | #include <sys/wait.h> |
| 33 | #endif |
| 34 | #include "net/eth.h" |
| 35 | #include "net/net.h" |
| 36 | #include "clients.h" |
| 37 | #include "hub.h" |
| 38 | #include "monitor/monitor.h" |
| 39 | #include "monitor/hmp.h" |
| 40 | #include "qemu/error-report.h" |
| 41 | #include "qemu/sockets.h" |
| 42 | #include <libslirp.h> |
| 43 | #include "chardev/char-fe.h" |
| 44 | #include "system/system.h" |
| 45 | #include "qemu/cutils.h" |
| 46 | #include "qapi/error.h" |
| 47 | #include "qapi/qapi-commands-net.h" |
| 48 | #include "qobject/qdict.h" |
| 49 | #include "util.h" |
| 50 | #include "migration/register.h" |
| 51 | #include "migration/vmstate.h" |
| 52 | #include "migration/qemu-file-types.h" |
| 53 | |
| 54 | static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) |
| 55 | { |
| 56 | const char *p, *p1; |
| 57 | int len; |
| 58 | p = *pp; |
| 59 | /* negative sep means to search -sep from the end of buf */ |
| 60 | p1 = sep >= 0 ? strchr(p, sep) : strrchr(p, -sep); |
| 61 | if (!p1) |
| 62 | return -1; |
| 63 | len = p1 - p; |
| 64 | p1++; |
| 65 | if (buf_size > 0) { |
| 66 | if (len > buf_size - 1) |
| 67 | len = buf_size - 1; |
| 68 | memcpy(buf, p, len); |
| 69 | buf[len] = '\0'; |
| 70 | } |
| 71 | *pp = p1; |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | /* slirp network adapter */ |
| 76 | |
| 77 | #define SLIRP_CFG_HOSTFWD 1 |
| 78 | |
| 79 | struct slirp_config_str { |
| 80 | struct slirp_config_str *next; |
| 81 | int flags; |
| 82 | char str[1024]; |
| 83 | }; |
| 84 | |
| 85 | struct GuestFwd { |
| 86 | CharFrontend hd; |
| 87 | struct in_addr server; |
| 88 | int port; |
| 89 | Slirp *slirp; |
| 90 | }; |
| 91 | |
| 92 | typedef struct SlirpState { |
| 93 | NetClientState nc; |
| 94 | QTAILQ_ENTRY(SlirpState) entry; |
| 95 | Slirp *slirp; |
| 96 | Notifier poll_notifier; |
| 97 | Notifier exit_notifier; |
| 98 | #if defined(CONFIG_SMBD_COMMAND) |
| 99 | gchar *smb_dir; |
| 100 | #endif |
| 101 | GSList *fwd; |
| 102 | } SlirpState; |
| 103 | |
| 104 | static struct slirp_config_str *slirp_configs; |
| 105 | static QTAILQ_HEAD(, SlirpState) slirp_stacks = |
| 106 | QTAILQ_HEAD_INITIALIZER(slirp_stacks); |
| 107 | |
| 108 | static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp); |
| 109 | static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp); |
| 110 | |
| 111 | #if defined(CONFIG_SMBD_COMMAND) |
| 112 | static int slirp_smb(SlirpState *s, const char *exported_dir, |
| 113 | struct in_addr vserver_addr, Error **errp); |
| 114 | static void slirp_smb_cleanup(SlirpState *s); |
| 115 | #else |
| 116 | static inline void slirp_smb_cleanup(SlirpState *s) { } |
| 117 | #endif |
| 118 | |
| 119 | static ssize_t net_slirp_send_packet(const void *pkt, size_t pkt_len, |
| 120 | void *opaque) |
| 121 | { |
| 122 | SlirpState *s = opaque; |
| 123 | uint8_t min_pkt[ETH_ZLEN]; |
| 124 | size_t min_pktsz = sizeof(min_pkt); |
| 125 | |
| 126 | if (net_peer_needs_padding(&s->nc)) { |
| 127 | if (eth_pad_short_frame(min_pkt, &min_pktsz, pkt, pkt_len)) { |
| 128 | pkt = min_pkt; |
| 129 | pkt_len = min_pktsz; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | return qemu_send_packet(&s->nc, pkt, pkt_len); |
| 134 | } |
| 135 | |
| 136 | static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
| 137 | { |
| 138 | SlirpState *s = DO_UPCAST(SlirpState, nc, nc); |
| 139 | |
| 140 | slirp_input(s->slirp, buf, size); |
| 141 | |
| 142 | return size; |
| 143 | } |
| 144 | |
| 145 | static void slirp_smb_exit(Notifier *n, void *data) |
| 146 | { |
| 147 | SlirpState *s = container_of(n, SlirpState, exit_notifier); |
| 148 | slirp_smb_cleanup(s); |
| 149 | } |
| 150 | |
| 151 | static void slirp_free_fwd(gpointer data) |
| 152 | { |
| 153 | struct GuestFwd *fwd = data; |
| 154 | |
| 155 | qemu_chr_fe_deinit(&fwd->hd, true); |
| 156 | g_free(data); |
| 157 | } |
| 158 | |
| 159 | static void net_slirp_cleanup(NetClientState *nc) |
| 160 | { |
| 161 | SlirpState *s = DO_UPCAST(SlirpState, nc, nc); |
| 162 | |
| 163 | g_slist_free_full(s->fwd, slirp_free_fwd); |
| 164 | main_loop_poll_remove_notifier(&s->poll_notifier); |
| 165 | unregister_savevm(NULL, "slirp", s->slirp); |
| 166 | slirp_cleanup(s->slirp); |
| 167 | if (s->exit_notifier.notify) { |
| 168 | qemu_remove_exit_notifier(&s->exit_notifier); |
| 169 | } |
| 170 | slirp_smb_cleanup(s); |
| 171 | QTAILQ_REMOVE(&slirp_stacks, s, entry); |
| 172 | } |
| 173 | |
| 174 | static NetClientInfo net_slirp_info = { |
| 175 | .type = NET_CLIENT_DRIVER_USER, |
| 176 | .size = sizeof(SlirpState), |
| 177 | .receive = net_slirp_receive, |
| 178 | .cleanup = net_slirp_cleanup, |
| 179 | }; |
| 180 | |
| 181 | static void net_slirp_guest_error(const char *msg, void *opaque) |
| 182 | { |
| 183 | qemu_log_mask(LOG_GUEST_ERROR, "%s", msg); |
| 184 | } |
| 185 | |
| 186 | static int64_t net_slirp_clock_get_ns(void *opaque) |
| 187 | { |
| 188 | return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| 189 | } |
| 190 | |
| 191 | typedef struct SlirpTimer SlirpTimer; |
| 192 | struct SlirpTimer { |
| 193 | QEMUTimer timer; |
| 194 | #if SLIRP_CHECK_VERSION(4,7,0) |
| 195 | Slirp *slirp; |
| 196 | SlirpTimerId id; |
| 197 | void *cb_opaque; |
| 198 | #endif |
| 199 | }; |
| 200 | |
| 201 | #if SLIRP_CHECK_VERSION(4,7,0) |
| 202 | static void net_slirp_init_completed(Slirp *slirp, void *opaque) |
| 203 | { |
| 204 | SlirpState *s = opaque; |
| 205 | s->slirp = slirp; |
| 206 | } |
| 207 | |
| 208 | static void net_slirp_timer_cb(void *opaque) |
| 209 | { |
| 210 | SlirpTimer *t = opaque; |
| 211 | slirp_handle_timer(t->slirp, t->id, t->cb_opaque); |
| 212 | } |
| 213 | |
| 214 | static void *net_slirp_timer_new_opaque(SlirpTimerId id, |
| 215 | void *cb_opaque, void *opaque) |
| 216 | { |
| 217 | SlirpState *s = opaque; |
| 218 | SlirpTimer *t = g_new(SlirpTimer, 1); |
| 219 | t->slirp = s->slirp; |
| 220 | t->id = id; |
| 221 | t->cb_opaque = cb_opaque; |
| 222 | timer_init_full(&t->timer, NULL, QEMU_CLOCK_VIRTUAL, |
| 223 | SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL, |
| 224 | net_slirp_timer_cb, t); |
| 225 | return t; |
| 226 | } |
| 227 | #else |
| 228 | static void *net_slirp_timer_new(SlirpTimerCb cb, |
| 229 | void *cb_opaque, void *opaque) |
| 230 | { |
| 231 | SlirpTimer *t = g_new(SlirpTimer, 1); |
| 232 | timer_init_full(&t->timer, NULL, QEMU_CLOCK_VIRTUAL, |
| 233 | SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL, |
| 234 | cb, cb_opaque); |
| 235 | return t; |
| 236 | } |
| 237 | #endif |
| 238 | |
| 239 | static void net_slirp_timer_free(void *timer, void *opaque) |
| 240 | { |
| 241 | SlirpTimer *t = timer; |
| 242 | timer_del(&t->timer); |
| 243 | g_free(t); |
| 244 | } |
| 245 | |
| 246 | static void net_slirp_timer_mod(void *timer, int64_t expire_timer, |
| 247 | void *opaque) |
| 248 | { |
| 249 | SlirpTimer *t = timer; |
| 250 | timer_mod(&t->timer, expire_timer); |
| 251 | } |
| 252 | |
| 253 | #if !SLIRP_CHECK_VERSION(4, 9, 0) |
| 254 | # define slirp_os_socket int |
| 255 | # define slirp_pollfds_fill_socket slirp_pollfds_fill |
| 256 | # define register_poll_socket register_poll_fd |
| 257 | # define unregister_poll_socket unregister_poll_fd |
| 258 | #endif |
| 259 | |
| 260 | static void net_slirp_register_poll_sock(slirp_os_socket fd, void *opaque) |
| 261 | { |
| 262 | #ifdef WIN32 |
| 263 | AioContext *ctxt = qemu_get_aio_context(); |
| 264 | g_autofree char *msg = NULL; |
| 265 | |
| 266 | if (WSAEventSelect(fd, event_notifier_get_handle(&ctxt->notifier), |
| 267 | FD_READ | FD_ACCEPT | FD_CLOSE | |
| 268 | FD_CONNECT | FD_WRITE | FD_OOB) != 0) { |
| 269 | msg = g_win32_error_message(WSAGetLastError()); |
| 270 | warn_report("failed to WSAEventSelect(): %s", msg); |
| 271 | } |
| 272 | #endif |
| 273 | } |
| 274 | |
| 275 | static void net_slirp_unregister_poll_sock(slirp_os_socket fd, void *opaque) |
| 276 | { |
| 277 | #ifdef WIN32 |
| 278 | g_autofree char *msg = NULL; |
| 279 | |
| 280 | if (WSAEventSelect(fd, NULL, 0) != 0) { |
| 281 | msg = g_win32_error_message(WSAGetLastError()); |
| 282 | warn_report("failed to WSAEventSelect(): %s", msg); |
| 283 | } |
| 284 | #endif |
| 285 | } |
| 286 | |
| 287 | static void net_slirp_notify(void *opaque) |
| 288 | { |
| 289 | qemu_notify_event(); |
| 290 | } |
| 291 | |
| 292 | static const SlirpCb slirp_cb = { |
| 293 | .send_packet = net_slirp_send_packet, |
| 294 | .guest_error = net_slirp_guest_error, |
| 295 | .clock_get_ns = net_slirp_clock_get_ns, |
| 296 | #if SLIRP_CHECK_VERSION(4,7,0) |
| 297 | .init_completed = net_slirp_init_completed, |
| 298 | .timer_new_opaque = net_slirp_timer_new_opaque, |
| 299 | #else |
| 300 | .timer_new = net_slirp_timer_new, |
| 301 | #endif |
| 302 | .timer_free = net_slirp_timer_free, |
| 303 | .timer_mod = net_slirp_timer_mod, |
| 304 | .register_poll_socket = net_slirp_register_poll_sock, |
| 305 | .unregister_poll_socket = net_slirp_unregister_poll_sock, |
| 306 | .notify = net_slirp_notify, |
| 307 | }; |
| 308 | |
| 309 | static int slirp_poll_to_gio(int events) |
| 310 | { |
| 311 | int ret = 0; |
| 312 | |
| 313 | if (events & SLIRP_POLL_IN) { |
| 314 | ret |= G_IO_IN; |
| 315 | } |
| 316 | if (events & SLIRP_POLL_OUT) { |
| 317 | ret |= G_IO_OUT; |
| 318 | } |
| 319 | if (events & SLIRP_POLL_PRI) { |
| 320 | ret |= G_IO_PRI; |
| 321 | } |
| 322 | if (events & SLIRP_POLL_ERR) { |
| 323 | ret |= G_IO_ERR; |
| 324 | } |
| 325 | if (events & SLIRP_POLL_HUP) { |
| 326 | ret |= G_IO_HUP; |
| 327 | } |
| 328 | |
| 329 | return ret; |
| 330 | } |
| 331 | |
| 332 | static int net_slirp_add_poll(slirp_os_socket fd, int events, void *opaque) |
| 333 | { |
| 334 | GArray *pollfds = opaque; |
| 335 | GPollFD pfd = { |
| 336 | .fd = fd, |
| 337 | .events = slirp_poll_to_gio(events), |
| 338 | }; |
| 339 | int idx = pollfds->len; |
| 340 | g_array_append_val(pollfds, pfd); |
| 341 | return idx; |
| 342 | } |
| 343 | |
| 344 | static int slirp_gio_to_poll(int events) |
| 345 | { |
| 346 | int ret = 0; |
| 347 | |
| 348 | if (events & G_IO_IN) { |
| 349 | ret |= SLIRP_POLL_IN; |
| 350 | } |
| 351 | if (events & G_IO_OUT) { |
| 352 | ret |= SLIRP_POLL_OUT; |
| 353 | } |
| 354 | if (events & G_IO_PRI) { |
| 355 | ret |= SLIRP_POLL_PRI; |
| 356 | } |
| 357 | if (events & G_IO_ERR) { |
| 358 | ret |= SLIRP_POLL_ERR; |
| 359 | } |
| 360 | if (events & G_IO_HUP) { |
| 361 | ret |= SLIRP_POLL_HUP; |
| 362 | } |
| 363 | |
| 364 | return ret; |
| 365 | } |
| 366 | |
| 367 | static int net_slirp_get_revents(int idx, void *opaque) |
| 368 | { |
| 369 | GArray *pollfds = opaque; |
| 370 | |
| 371 | return slirp_gio_to_poll(g_array_index(pollfds, GPollFD, idx).revents); |
| 372 | } |
| 373 | |
| 374 | static void net_slirp_poll_notify(Notifier *notifier, void *data) |
| 375 | { |
| 376 | MainLoopPoll *poll = data; |
| 377 | SlirpState *s = container_of(notifier, SlirpState, poll_notifier); |
| 378 | |
| 379 | switch (poll->state) { |
| 380 | case MAIN_LOOP_POLL_FILL: |
| 381 | slirp_pollfds_fill_socket(s->slirp, &poll->timeout, |
| 382 | net_slirp_add_poll, poll->pollfds); |
| 383 | break; |
| 384 | case MAIN_LOOP_POLL_OK: |
| 385 | case MAIN_LOOP_POLL_ERR: |
| 386 | slirp_pollfds_poll(s->slirp, poll->state == MAIN_LOOP_POLL_ERR, |
| 387 | net_slirp_get_revents, poll->pollfds); |
| 388 | break; |
| 389 | default: |
| 390 | g_assert_not_reached(); |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | static ssize_t |
| 395 | net_slirp_stream_read(void *buf, size_t size, void *opaque) |
| 396 | { |
| 397 | QEMUFile *f = opaque; |
| 398 | |
| 399 | return qemu_get_buffer(f, buf, size); |
| 400 | } |
| 401 | |
| 402 | static ssize_t |
| 403 | net_slirp_stream_write(const void *buf, size_t size, void *opaque) |
| 404 | { |
| 405 | QEMUFile *f = opaque; |
| 406 | |
| 407 | qemu_put_buffer(f, buf, size); |
| 408 | if (qemu_file_get_error(f)) { |
| 409 | return -1; |
| 410 | } |
| 411 | |
| 412 | return size; |
| 413 | } |
| 414 | |
| 415 | static int net_slirp_state_load(QEMUFile *f, void *opaque, int version_id) |
| 416 | { |
| 417 | Slirp *slirp = opaque; |
| 418 | |
| 419 | return slirp_state_load(slirp, version_id, net_slirp_stream_read, f); |
| 420 | } |
| 421 | |
| 422 | static void net_slirp_state_save(QEMUFile *f, void *opaque) |
| 423 | { |
| 424 | Slirp *slirp = opaque; |
| 425 | |
| 426 | slirp_state_save(slirp, net_slirp_stream_write, f); |
| 427 | } |
| 428 | |
| 429 | static SaveVMHandlers savevm_slirp_state = { |
| 430 | .save_state = net_slirp_state_save, |
| 431 | .load_state = net_slirp_state_load, |
| 432 | }; |
| 433 | |
| 434 | static int net_slirp_init(NetClientState *peer, const char *model, |
| 435 | const char *name, int restricted, |
| 436 | bool ipv4, const char *vnetwork, const char *vhost, |
| 437 | bool ipv6, const char *vprefix6, int vprefix6_len, |
| 438 | const char *vhost6, |
| 439 | const char *vhostname, const char *tftp_export, |
| 440 | const char *bootfile, const char *vdhcp_start, |
| 441 | const char *vnameserver, const char *vnameserver6, |
| 442 | const char *smb_export, const char *vsmbserver, |
| 443 | const char **dnssearch, const char *vdomainname, |
| 444 | const char *tftp_server_name, |
| 445 | Error **errp) |
| 446 | { |
| 447 | /* default settings according to historic slirp */ |
| 448 | struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */ |
| 449 | struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */ |
| 450 | struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */ |
| 451 | struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */ |
| 452 | struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */ |
| 453 | struct in6_addr ip6_prefix; |
| 454 | struct in6_addr ip6_host; |
| 455 | struct in6_addr ip6_dns; |
| 456 | #if defined(CONFIG_SMBD_COMMAND) |
| 457 | struct in_addr smbsrv = { .s_addr = 0 }; |
| 458 | #endif |
| 459 | SlirpConfig cfg = { 0 }; |
| 460 | NetClientState *nc; |
| 461 | SlirpState *s; |
| 462 | char buf[20]; |
| 463 | uint32_t addr; |
| 464 | int shift; |
| 465 | char *end; |
| 466 | struct slirp_config_str *config; |
| 467 | |
| 468 | if (!ipv4 && (vnetwork || vhost || vnameserver)) { |
| 469 | error_setg(errp, "IPv4 disabled but netmask/host/dns provided"); |
| 470 | return -1; |
| 471 | } |
| 472 | |
| 473 | if (!ipv6 && (vprefix6 || vhost6 || vnameserver6)) { |
| 474 | error_setg(errp, "IPv6 disabled but prefix/host6/dns6 provided"); |
| 475 | return -1; |
| 476 | } |
| 477 | |
| 478 | if (!ipv4 && !ipv6) { |
| 479 | /* It doesn't make sense to disable both */ |
| 480 | error_setg(errp, "IPv4 and IPv6 disabled"); |
| 481 | return -1; |
| 482 | } |
| 483 | |
| 484 | if (vnetwork) { |
| 485 | if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) { |
| 486 | if (!inet_aton(vnetwork, &net)) { |
| 487 | error_setg(errp, "Failed to parse netmask"); |
| 488 | return -1; |
| 489 | } |
| 490 | addr = ntohl(net.s_addr); |
| 491 | if (!(addr & 0x80000000)) { |
| 492 | mask.s_addr = htonl(0xff000000); /* class A */ |
| 493 | } else if ((addr & 0xfff00000) == 0xac100000) { |
| 494 | mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */ |
| 495 | } else if ((addr & 0xc0000000) == 0x80000000) { |
| 496 | mask.s_addr = htonl(0xffff0000); /* class B */ |
| 497 | } else if ((addr & 0xffff0000) == 0xc0a80000) { |
| 498 | mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */ |
| 499 | } else if ((addr & 0xffff0000) == 0xc6120000) { |
| 500 | mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */ |
| 501 | } else if ((addr & 0xe0000000) == 0xe0000000) { |
| 502 | mask.s_addr = htonl(0xffffff00); /* class C */ |
| 503 | } else { |
| 504 | mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */ |
| 505 | } |
| 506 | } else { |
| 507 | if (!inet_aton(buf, &net)) { |
| 508 | error_setg(errp, "Failed to parse netmask"); |
| 509 | return -1; |
| 510 | } |
| 511 | shift = strtol(vnetwork, &end, 10); |
| 512 | if (*end != '\0') { |
| 513 | if (!inet_aton(vnetwork, &mask)) { |
| 514 | error_setg(errp, |
| 515 | "Failed to parse netmask (trailing chars)"); |
| 516 | return -1; |
| 517 | } |
| 518 | } else if (shift < 4 || shift > 32) { |
| 519 | error_setg(errp, |
| 520 | "Invalid netmask provided (must be in range 4-32)"); |
| 521 | return -1; |
| 522 | } else { |
| 523 | mask.s_addr = htonl(0xffffffff << (32 - shift)); |
| 524 | } |
| 525 | } |
| 526 | net.s_addr &= mask.s_addr; |
| 527 | host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr); |
| 528 | dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr); |
| 529 | dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr); |
| 530 | } |
| 531 | |
| 532 | if (vhost && !inet_aton(vhost, &host)) { |
| 533 | error_setg(errp, "Failed to parse host"); |
| 534 | return -1; |
| 535 | } |
| 536 | if ((host.s_addr & mask.s_addr) != net.s_addr) { |
| 537 | error_setg(errp, "Host doesn't belong to network"); |
| 538 | return -1; |
| 539 | } |
| 540 | |
| 541 | if (vnameserver && !inet_aton(vnameserver, &dns)) { |
| 542 | error_setg(errp, "Failed to parse DNS"); |
| 543 | return -1; |
| 544 | } |
| 545 | if (restricted && (dns.s_addr & mask.s_addr) != net.s_addr) { |
| 546 | error_setg(errp, "DNS doesn't belong to network"); |
| 547 | return -1; |
| 548 | } |
| 549 | if (dns.s_addr == host.s_addr) { |
| 550 | error_setg(errp, "DNS must be different from host"); |
| 551 | return -1; |
| 552 | } |
| 553 | |
| 554 | if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) { |
| 555 | error_setg(errp, "Failed to parse DHCP start address"); |
| 556 | return -1; |
| 557 | } |
| 558 | if ((dhcp.s_addr & mask.s_addr) != net.s_addr) { |
| 559 | error_setg(errp, "DHCP doesn't belong to network"); |
| 560 | return -1; |
| 561 | } |
| 562 | if (dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) { |
| 563 | error_setg(errp, "DHCP must be different from host and DNS"); |
| 564 | return -1; |
| 565 | } |
| 566 | |
| 567 | #if defined(CONFIG_SMBD_COMMAND) |
| 568 | if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) { |
| 569 | error_setg(errp, "Failed to parse SMB address"); |
| 570 | return -1; |
| 571 | } |
| 572 | #endif |
| 573 | |
| 574 | if (!vprefix6) { |
| 575 | vprefix6 = "fec0::"; |
| 576 | } |
| 577 | if (!inet_pton(AF_INET6, vprefix6, &ip6_prefix)) { |
| 578 | error_setg(errp, "Failed to parse IPv6 prefix"); |
| 579 | return -1; |
| 580 | } |
| 581 | |
| 582 | if (!vprefix6_len) { |
| 583 | vprefix6_len = 64; |
| 584 | } |
| 585 | if (vprefix6_len < 0 || vprefix6_len > 126) { |
| 586 | error_setg(errp, |
| 587 | "Invalid IPv6 prefix provided " |
| 588 | "(IPv6 prefix length must be between 0 and 126)"); |
| 589 | return -1; |
| 590 | } |
| 591 | |
| 592 | if (vhost6) { |
| 593 | if (!inet_pton(AF_INET6, vhost6, &ip6_host)) { |
| 594 | error_setg(errp, "Failed to parse IPv6 host"); |
| 595 | return -1; |
| 596 | } |
| 597 | if (!in6_equal_net(&ip6_prefix, &ip6_host, vprefix6_len)) { |
| 598 | error_setg(errp, "IPv6 Host doesn't belong to network"); |
| 599 | return -1; |
| 600 | } |
| 601 | } else { |
| 602 | ip6_host = ip6_prefix; |
| 603 | ip6_host.s6_addr[15] |= 2; |
| 604 | } |
| 605 | |
| 606 | if (vnameserver6) { |
| 607 | if (!inet_pton(AF_INET6, vnameserver6, &ip6_dns)) { |
| 608 | error_setg(errp, "Failed to parse IPv6 DNS"); |
| 609 | return -1; |
| 610 | } |
| 611 | if (restricted && !in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) { |
| 612 | error_setg(errp, "IPv6 DNS doesn't belong to network"); |
| 613 | return -1; |
| 614 | } |
| 615 | } else { |
| 616 | ip6_dns = ip6_prefix; |
| 617 | ip6_dns.s6_addr[15] |= 3; |
| 618 | } |
| 619 | |
| 620 | if (vdomainname && !*vdomainname) { |
| 621 | error_setg(errp, "'domainname' parameter cannot be empty"); |
| 622 | return -1; |
| 623 | } |
| 624 | |
| 625 | if (vdomainname && strlen(vdomainname) > 255) { |
| 626 | error_setg(errp, "'domainname' parameter cannot exceed 255 bytes"); |
| 627 | return -1; |
| 628 | } |
| 629 | |
| 630 | if (vhostname && strlen(vhostname) > 255) { |
| 631 | error_setg(errp, "'vhostname' parameter cannot exceed 255 bytes"); |
| 632 | return -1; |
| 633 | } |
| 634 | |
| 635 | if (tftp_server_name && strlen(tftp_server_name) > 255) { |
| 636 | error_setg(errp, "'tftp-server-name' parameter cannot exceed 255 bytes"); |
| 637 | return -1; |
| 638 | } |
| 639 | |
| 640 | nc = qemu_new_net_client(&net_slirp_info, peer, model, name); |
| 641 | |
| 642 | qemu_set_info_str(nc, "net=%s,restrict=%s", inet_ntoa(net), |
| 643 | restricted ? "on" : "off"); |
| 644 | |
| 645 | s = DO_UPCAST(SlirpState, nc, nc); |
| 646 | |
| 647 | cfg.version = |
| 648 | SLIRP_CHECK_VERSION(4, 9, 0) ? 6 : |
| 649 | SLIRP_CHECK_VERSION(4, 7, 0) ? 4 : 1; |
| 650 | cfg.restricted = restricted; |
| 651 | cfg.in_enabled = ipv4; |
| 652 | cfg.vnetwork = net; |
| 653 | cfg.vnetmask = mask; |
| 654 | cfg.vhost = host; |
| 655 | cfg.in6_enabled = ipv6; |
| 656 | cfg.vprefix_addr6 = ip6_prefix; |
| 657 | cfg.vprefix_len = vprefix6_len; |
| 658 | cfg.vhost6 = ip6_host; |
| 659 | cfg.vhostname = vhostname; |
| 660 | cfg.tftp_server_name = tftp_server_name; |
| 661 | cfg.tftp_path = tftp_export; |
| 662 | cfg.bootfile = bootfile; |
| 663 | cfg.vdhcp_start = dhcp; |
| 664 | cfg.vnameserver = dns; |
| 665 | cfg.vnameserver6 = ip6_dns; |
| 666 | cfg.vdnssearch = dnssearch; |
| 667 | cfg.vdomainname = vdomainname; |
| 668 | s->slirp = slirp_new(&cfg, &slirp_cb, s); |
| 669 | QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry); |
| 670 | |
| 671 | /* |
| 672 | * Make sure the current bitstream version of slirp is 4, to avoid |
| 673 | * QEMU migration incompatibilities, if upstream slirp bumped the |
| 674 | * version. |
| 675 | * |
| 676 | * FIXME: use bitfields of features? teach libslirp to save with |
| 677 | * specific version? |
| 678 | */ |
| 679 | g_assert(slirp_state_version() == 4); |
| 680 | register_savevm_live("slirp", VMSTATE_INSTANCE_ID_ANY, |
| 681 | slirp_state_version(), &savevm_slirp_state, s->slirp); |
| 682 | |
| 683 | s->poll_notifier.notify = net_slirp_poll_notify; |
| 684 | main_loop_poll_add_notifier(&s->poll_notifier); |
| 685 | |
| 686 | for (config = slirp_configs; config; config = config->next) { |
| 687 | if (config->flags & SLIRP_CFG_HOSTFWD) { |
| 688 | if (slirp_hostfwd(s, config->str, errp) < 0) { |
| 689 | goto error; |
| 690 | } |
| 691 | } else { |
| 692 | if (slirp_guestfwd(s, config->str, errp) < 0) { |
| 693 | goto error; |
| 694 | } |
| 695 | } |
| 696 | } |
| 697 | #if defined(CONFIG_SMBD_COMMAND) |
| 698 | if (smb_export) { |
| 699 | if (slirp_smb(s, smb_export, smbsrv, errp) < 0) { |
| 700 | goto error; |
| 701 | } |
| 702 | } |
| 703 | #endif |
| 704 | |
| 705 | s->exit_notifier.notify = slirp_smb_exit; |
| 706 | qemu_add_exit_notifier(&s->exit_notifier); |
| 707 | return 0; |
| 708 | |
| 709 | error: |
| 710 | qemu_del_net_client(nc); |
| 711 | return -1; |
| 712 | } |
| 713 | |
| 714 | #ifdef CONFIG_HMP |
| 715 | static SlirpState *slirp_lookup(MonitorHMP *hmp, const char *id) |
| 716 | { |
| 717 | if (id) { |
| 718 | NetClientState *nc = qemu_find_netdev(id); |
| 719 | if (!nc) { |
| 720 | monitor_hmp_printf(hmp, "unrecognized netdev id '%s'\n", id); |
| 721 | return NULL; |
| 722 | } |
| 723 | if (strcmp(nc->model, "user")) { |
| 724 | monitor_hmp_printf(hmp, "invalid device specified\n"); |
| 725 | return NULL; |
| 726 | } |
| 727 | return DO_UPCAST(SlirpState, nc, nc); |
| 728 | } else { |
| 729 | if (QTAILQ_EMPTY(&slirp_stacks)) { |
| 730 | monitor_hmp_printf(hmp, "user mode network stack not in use\n"); |
| 731 | return NULL; |
| 732 | } |
| 733 | return QTAILQ_FIRST(&slirp_stacks); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | void hmp_hostfwd_remove(MonitorHMP *hmp, const QDict *qdict) |
| 738 | { |
| 739 | /* TODO: support removing unix fwd */ |
| 740 | struct sockaddr_in host_addr = { |
| 741 | .sin_family = AF_INET, |
| 742 | .sin_addr = { |
| 743 | .s_addr = INADDR_ANY, |
| 744 | }, |
| 745 | }; |
| 746 | int host_port; |
| 747 | char buf[256]; |
| 748 | const char *src_str, *p; |
| 749 | SlirpState *s; |
| 750 | int is_udp = 0; |
| 751 | int err; |
| 752 | const char *arg1 = qdict_get_str(qdict, "arg1"); |
| 753 | const char *arg2 = qdict_get_try_str(qdict, "arg2"); |
| 754 | |
| 755 | if (arg2) { |
| 756 | s = slirp_lookup(hmp, arg1); |
| 757 | src_str = arg2; |
| 758 | } else { |
| 759 | s = slirp_lookup(hmp, NULL); |
| 760 | src_str = arg1; |
| 761 | } |
| 762 | if (!s) { |
| 763 | return; |
| 764 | } |
| 765 | |
| 766 | p = src_str; |
| 767 | if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| 768 | goto fail_syntax; |
| 769 | } |
| 770 | |
| 771 | if (!strcmp(buf, "tcp") || buf[0] == '\0') { |
| 772 | is_udp = 0; |
| 773 | } else if (!strcmp(buf, "udp")) { |
| 774 | is_udp = 1; |
| 775 | } else { |
| 776 | goto fail_syntax; |
| 777 | } |
| 778 | |
| 779 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| 780 | goto fail_syntax; |
| 781 | } |
| 782 | if (buf[0] != '\0' && !inet_aton(buf, &host_addr.sin_addr)) { |
| 783 | goto fail_syntax; |
| 784 | } |
| 785 | |
| 786 | if (qemu_strtoi(p, NULL, 10, &host_port)) { |
| 787 | goto fail_syntax; |
| 788 | } |
| 789 | host_addr.sin_port = htons(host_port); |
| 790 | |
| 791 | #if SLIRP_CHECK_VERSION(4, 5, 0) |
| 792 | err = slirp_remove_hostxfwd(s->slirp, (struct sockaddr *) &host_addr, |
| 793 | sizeof(host_addr), is_udp ? SLIRP_HOSTFWD_UDP : 0); |
| 794 | #else |
| 795 | err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr.sin_addr, host_port); |
| 796 | #endif |
| 797 | |
| 798 | monitor_hmp_printf(hmp, "host forwarding rule for %s %s\n", src_str, |
| 799 | err ? "not found" : "removed"); |
| 800 | return; |
| 801 | |
| 802 | fail_syntax: |
| 803 | monitor_hmp_printf(hmp, "invalid format\n"); |
| 804 | } |
| 805 | #endif |
| 806 | |
| 807 | static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp) |
| 808 | { |
| 809 | union { |
| 810 | struct sockaddr_in in; |
| 811 | #if !defined(WIN32) && SLIRP_CHECK_VERSION(4, 7, 0) |
| 812 | struct sockaddr_un un; |
| 813 | #endif |
| 814 | } host_addr = {0}; |
| 815 | |
| 816 | struct sockaddr_in guest_addr = { |
| 817 | .sin_family = AF_INET, |
| 818 | .sin_addr = { |
| 819 | .s_addr = 0, |
| 820 | }, |
| 821 | }; |
| 822 | int err; |
| 823 | int host_port, guest_port; |
| 824 | const char *p; |
| 825 | char buf[256]; |
| 826 | int is_udp = 0; |
| 827 | #if !defined(WIN32) && SLIRP_CHECK_VERSION(4, 7, 0) |
| 828 | int is_unix = 0; |
| 829 | #endif |
| 830 | const char *end; |
| 831 | const char *fail_reason = "Unknown reason"; |
| 832 | socklen_t host_addr_size; |
| 833 | |
| 834 | p = redir_str; |
| 835 | if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| 836 | fail_reason = "No : separators"; |
| 837 | goto fail_syntax; |
| 838 | } |
| 839 | if (!strcmp(buf, "tcp") || buf[0] == '\0') { |
| 840 | is_udp = 0; |
| 841 | } else if (!strcmp(buf, "udp")) { |
| 842 | is_udp = 1; |
| 843 | } |
| 844 | #if !defined(WIN32) && SLIRP_CHECK_VERSION(4, 7, 0) |
| 845 | else if (!strcmp(buf, "unix")) { |
| 846 | is_unix = 1; |
| 847 | } |
| 848 | #endif |
| 849 | else { |
| 850 | fail_reason = "Bad protocol name"; |
| 851 | goto fail_syntax; |
| 852 | } |
| 853 | |
| 854 | #if !defined(WIN32) && SLIRP_CHECK_VERSION(4, 7, 0) |
| 855 | if (is_unix) { |
| 856 | if (get_str_sep(buf, sizeof(buf), &p, 0 - '-') < 0) { |
| 857 | fail_reason = "Missing - separator"; |
| 858 | goto fail_syntax; |
| 859 | } |
| 860 | if (buf[0] == '\0') { |
| 861 | fail_reason = "Missing unix socket path"; |
| 862 | goto fail_syntax; |
| 863 | } |
| 864 | if (buf[0] != '/') { |
| 865 | fail_reason = "unix socket path must be absolute"; |
| 866 | goto fail_syntax; |
| 867 | } |
| 868 | |
| 869 | size_t path_len = strlen(buf); |
| 870 | if (path_len > sizeof(host_addr.un.sun_path) - 1) { |
| 871 | fail_reason = "Unix socket path is too long"; |
| 872 | goto fail_syntax; |
| 873 | } |
| 874 | |
| 875 | struct stat st; |
| 876 | if (stat(buf, &st) == 0) { |
| 877 | if (!S_ISSOCK(st.st_mode)) { |
| 878 | fail_reason = "file exists and it's not unix socket"; |
| 879 | goto fail_syntax; |
| 880 | } |
| 881 | |
| 882 | if (unlink(buf) < 0) { |
| 883 | error_setg_errno(errp, errno, "Failed to unlink '%s'", buf); |
| 884 | goto fail_syntax; |
| 885 | } |
| 886 | } |
| 887 | host_addr.un.sun_family = AF_UNIX; |
| 888 | memcpy(host_addr.un.sun_path, buf, path_len); |
| 889 | host_addr_size = sizeof(host_addr.un); |
| 890 | } else |
| 891 | #endif |
| 892 | { |
| 893 | host_addr.in.sin_family = AF_INET; |
| 894 | host_addr.in.sin_addr.s_addr = INADDR_ANY; |
| 895 | |
| 896 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| 897 | fail_reason = "Missing : separator"; |
| 898 | goto fail_syntax; |
| 899 | } |
| 900 | |
| 901 | if (buf[0] != '\0' && !inet_aton(buf, &host_addr.in.sin_addr)) { |
| 902 | fail_reason = "Bad host address"; |
| 903 | goto fail_syntax; |
| 904 | } |
| 905 | |
| 906 | if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { |
| 907 | fail_reason = "Bad host port separator"; |
| 908 | goto fail_syntax; |
| 909 | } |
| 910 | |
| 911 | err = qemu_strtoi(buf, &end, 0, &host_port); |
| 912 | if (err || host_port < 0 || host_port > 65535) { |
| 913 | fail_reason = "Bad host port"; |
| 914 | goto fail_syntax; |
| 915 | } |
| 916 | |
| 917 | host_addr.in.sin_port = htons(host_port); |
| 918 | host_addr_size = sizeof(host_addr.in); |
| 919 | } |
| 920 | |
| 921 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| 922 | fail_reason = "Missing guest address"; |
| 923 | goto fail_syntax; |
| 924 | } |
| 925 | if (buf[0] != '\0' && !inet_aton(buf, &guest_addr.sin_addr)) { |
| 926 | fail_reason = "Bad guest address"; |
| 927 | goto fail_syntax; |
| 928 | } |
| 929 | |
| 930 | err = qemu_strtoi(p, &end, 0, &guest_port); |
| 931 | if (err || guest_port < 1 || guest_port > 65535) { |
| 932 | fail_reason = "Bad guest port"; |
| 933 | goto fail_syntax; |
| 934 | } |
| 935 | guest_addr.sin_port = htons(guest_port); |
| 936 | |
| 937 | #if SLIRP_CHECK_VERSION(4, 5, 0) |
| 938 | err = slirp_add_hostxfwd(s->slirp, |
| 939 | (struct sockaddr *) &host_addr, host_addr_size, |
| 940 | (struct sockaddr *) &guest_addr, sizeof(guest_addr), |
| 941 | is_udp ? SLIRP_HOSTFWD_UDP : 0); |
| 942 | #else |
| 943 | (void) host_addr_size; |
| 944 | err = slirp_add_hostfwd(s->slirp, is_udp, |
| 945 | host_addr.in.sin_addr, host_port, |
| 946 | guest_addr.sin_addr, guest_port); |
| 947 | #endif |
| 948 | |
| 949 | if (err < 0) { |
| 950 | error_setg(errp, "Could not set up host forwarding rule '%s'", |
| 951 | redir_str); |
| 952 | return -1; |
| 953 | } |
| 954 | return 0; |
| 955 | |
| 956 | fail_syntax: |
| 957 | error_setg(errp, "Invalid host forwarding rule '%s' (%s)", redir_str, |
| 958 | fail_reason); |
| 959 | return -1; |
| 960 | } |
| 961 | |
| 962 | #ifdef CONFIG_HMP |
| 963 | void hmp_hostfwd_add(MonitorHMP *hmp, const QDict *qdict) |
| 964 | { |
| 965 | const char *redir_str; |
| 966 | SlirpState *s; |
| 967 | const char *arg1 = qdict_get_str(qdict, "arg1"); |
| 968 | const char *arg2 = qdict_get_try_str(qdict, "arg2"); |
| 969 | |
| 970 | if (arg2) { |
| 971 | s = slirp_lookup(hmp, arg1); |
| 972 | redir_str = arg2; |
| 973 | } else { |
| 974 | s = slirp_lookup(hmp, NULL); |
| 975 | redir_str = arg1; |
| 976 | } |
| 977 | if (s) { |
| 978 | Error *err = NULL; |
| 979 | if (slirp_hostfwd(s, redir_str, &err) < 0) { |
| 980 | error_report_err(err); |
| 981 | } |
| 982 | } |
| 983 | } |
| 984 | #endif |
| 985 | |
| 986 | #if defined(CONFIG_SMBD_COMMAND) |
| 987 | |
| 988 | /* automatic user mode samba server configuration */ |
| 989 | static void slirp_smb_cleanup(SlirpState *s) |
| 990 | { |
| 991 | int ret; |
| 992 | |
| 993 | if (s->smb_dir) { |
| 994 | gchar *cmd = g_strdup_printf("rm -rf %s", s->smb_dir); |
| 995 | ret = system(cmd); |
| 996 | if (ret == -1 || !WIFEXITED(ret)) { |
| 997 | error_report("'%s' failed.", cmd); |
| 998 | } else if (WEXITSTATUS(ret)) { |
| 999 | error_report("'%s' failed. Error code: %d", |
| 1000 | cmd, WEXITSTATUS(ret)); |
| 1001 | } |
| 1002 | g_free(cmd); |
| 1003 | g_free(s->smb_dir); |
| 1004 | s->smb_dir = NULL; |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | static int slirp_smb(SlirpState* s, const char *exported_dir, |
| 1009 | struct in_addr vserver_addr, Error **errp) |
| 1010 | { |
| 1011 | char *smb_conf; |
| 1012 | char *smb_cmdline; |
| 1013 | struct passwd *passwd; |
| 1014 | FILE *f; |
| 1015 | |
| 1016 | passwd = getpwuid(geteuid()); |
| 1017 | if (!passwd) { |
| 1018 | error_setg(errp, "Failed to retrieve user name"); |
| 1019 | return -1; |
| 1020 | } |
| 1021 | |
| 1022 | if (access(CONFIG_SMBD_COMMAND, F_OK)) { |
| 1023 | error_setg(errp, "Could not find '%s', please install it", |
| 1024 | CONFIG_SMBD_COMMAND); |
| 1025 | return -1; |
| 1026 | } |
| 1027 | |
| 1028 | if (access(exported_dir, R_OK | X_OK)) { |
| 1029 | error_setg_errno(errp, errno, |
| 1030 | "Error accessing shared directory '%s'", |
| 1031 | exported_dir); |
| 1032 | return -1; |
| 1033 | } |
| 1034 | |
| 1035 | s->smb_dir = g_dir_make_tmp("qemu-smb.XXXXXX", NULL); |
| 1036 | if (!s->smb_dir) { |
| 1037 | error_setg(errp, "Could not create samba server dir"); |
| 1038 | return -1; |
| 1039 | } |
| 1040 | smb_conf = g_strdup_printf("%s/%s", s->smb_dir, "smb.conf"); |
| 1041 | |
| 1042 | f = fopen(smb_conf, "w"); |
| 1043 | if (!f) { |
| 1044 | int eno = errno; |
| 1045 | |
| 1046 | slirp_smb_cleanup(s); |
| 1047 | error_setg_errno(errp, eno, |
| 1048 | "Could not create samba server configuration file '%s'", |
| 1049 | smb_conf); |
| 1050 | g_free(smb_conf); |
| 1051 | return -1; |
| 1052 | } |
| 1053 | fprintf(f, |
| 1054 | "[global]\n" |
| 1055 | "private dir=%s\n" |
| 1056 | "interfaces=127.0.0.1\n" |
| 1057 | "bind interfaces only=yes\n" |
| 1058 | "pid directory=%s\n" |
| 1059 | "lock directory=%s\n" |
| 1060 | "state directory=%s\n" |
| 1061 | "cache directory=%s\n" |
| 1062 | "ncalrpc dir=%s/ncalrpc\n" |
| 1063 | "log file=%s/log.smbd\n" |
| 1064 | "smb passwd file=%s/smbpasswd\n" |
| 1065 | "security = user\n" |
| 1066 | "map to guest = Bad User\n" |
| 1067 | "load printers = no\n" |
| 1068 | "printing = bsd\n" |
| 1069 | "disable spoolss = yes\n" |
| 1070 | "usershare max shares = 0\n" |
| 1071 | "[qemu]\n" |
| 1072 | "path=%s\n" |
| 1073 | "read only=no\n" |
| 1074 | "guest ok=yes\n" |
| 1075 | "force user=%s\n", |
| 1076 | s->smb_dir, |
| 1077 | s->smb_dir, |
| 1078 | s->smb_dir, |
| 1079 | s->smb_dir, |
| 1080 | s->smb_dir, |
| 1081 | s->smb_dir, |
| 1082 | s->smb_dir, |
| 1083 | s->smb_dir, |
| 1084 | exported_dir, |
| 1085 | passwd->pw_name |
| 1086 | ); |
| 1087 | fclose(f); |
| 1088 | |
| 1089 | smb_cmdline = g_strdup_printf("%s -l %s -s %s", |
| 1090 | CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf); |
| 1091 | g_free(smb_conf); |
| 1092 | |
| 1093 | if (slirp_add_exec(s->slirp, smb_cmdline, &vserver_addr, 139) < 0 || |
| 1094 | slirp_add_exec(s->slirp, smb_cmdline, &vserver_addr, 445) < 0) { |
| 1095 | slirp_smb_cleanup(s); |
| 1096 | g_free(smb_cmdline); |
| 1097 | error_setg(errp, "Conflicting/invalid smbserver address"); |
| 1098 | return -1; |
| 1099 | } |
| 1100 | g_free(smb_cmdline); |
| 1101 | return 0; |
| 1102 | } |
| 1103 | |
| 1104 | #endif /* defined(CONFIG_SMBD_COMMAND) */ |
| 1105 | |
| 1106 | static int guestfwd_can_read(void *opaque) |
| 1107 | { |
| 1108 | struct GuestFwd *fwd = opaque; |
| 1109 | return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port); |
| 1110 | } |
| 1111 | |
| 1112 | static void guestfwd_read(void *opaque, const uint8_t *buf, int size) |
| 1113 | { |
| 1114 | struct GuestFwd *fwd = opaque; |
| 1115 | slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size); |
| 1116 | } |
| 1117 | |
| 1118 | static ssize_t guestfwd_write(const void *buf, size_t len, void *chr) |
| 1119 | { |
| 1120 | return qemu_chr_fe_write_all(chr, buf, len); |
| 1121 | } |
| 1122 | |
| 1123 | static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp) |
| 1124 | { |
| 1125 | /* TODO: IPv6 */ |
| 1126 | struct in_addr server = { .s_addr = 0 }; |
| 1127 | struct GuestFwd *fwd; |
| 1128 | const char *p; |
| 1129 | char buf[128]; |
| 1130 | char *end; |
| 1131 | int port; |
| 1132 | |
| 1133 | p = config_str; |
| 1134 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| 1135 | goto fail_syntax; |
| 1136 | } |
| 1137 | if (strcmp(buf, "tcp") && buf[0] != '\0') { |
| 1138 | goto fail_syntax; |
| 1139 | } |
| 1140 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
| 1141 | goto fail_syntax; |
| 1142 | } |
| 1143 | if (buf[0] != '\0' && !inet_aton(buf, &server)) { |
| 1144 | goto fail_syntax; |
| 1145 | } |
| 1146 | if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { |
| 1147 | goto fail_syntax; |
| 1148 | } |
| 1149 | port = strtol(buf, &end, 10); |
| 1150 | if (*end != '\0' || port < 1 || port > 65535) { |
| 1151 | goto fail_syntax; |
| 1152 | } |
| 1153 | |
| 1154 | snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port); |
| 1155 | |
| 1156 | if (g_str_has_prefix(p, "cmd:")) { |
| 1157 | if (slirp_add_exec(s->slirp, &p[4], &server, port) < 0) { |
| 1158 | error_setg(errp, "Conflicting/invalid host:port in guest " |
| 1159 | "forwarding rule '%s'", config_str); |
| 1160 | return -1; |
| 1161 | } |
| 1162 | } else { |
| 1163 | Error *err = NULL; |
| 1164 | /* |
| 1165 | * FIXME: sure we want to support implicit |
| 1166 | * muxed monitors here? |
| 1167 | */ |
| 1168 | Chardev *chr = qemu_chr_new_mux_mon(buf, p, NULL); |
| 1169 | |
| 1170 | if (!chr) { |
| 1171 | error_setg(errp, "Could not open guest forwarding device '%s'", |
| 1172 | buf); |
| 1173 | return -1; |
| 1174 | } |
| 1175 | |
| 1176 | fwd = g_new(struct GuestFwd, 1); |
| 1177 | qemu_chr_fe_init(&fwd->hd, chr, &err); |
| 1178 | if (err) { |
| 1179 | error_propagate(errp, err); |
| 1180 | object_unparent(OBJECT(chr)); |
| 1181 | g_free(fwd); |
| 1182 | return -1; |
| 1183 | } |
| 1184 | |
| 1185 | if (slirp_add_guestfwd(s->slirp, guestfwd_write, &fwd->hd, |
| 1186 | &server, port) < 0) { |
| 1187 | error_setg(errp, "Conflicting/invalid host:port in guest " |
| 1188 | "forwarding rule '%s'", config_str); |
| 1189 | qemu_chr_fe_deinit(&fwd->hd, true); |
| 1190 | g_free(fwd); |
| 1191 | return -1; |
| 1192 | } |
| 1193 | fwd->server = server; |
| 1194 | fwd->port = port; |
| 1195 | fwd->slirp = s->slirp; |
| 1196 | |
| 1197 | qemu_chr_fe_set_handlers(&fwd->hd, guestfwd_can_read, guestfwd_read, |
| 1198 | NULL, NULL, fwd, NULL, true); |
| 1199 | s->fwd = g_slist_append(s->fwd, fwd); |
| 1200 | } |
| 1201 | return 0; |
| 1202 | |
| 1203 | fail_syntax: |
| 1204 | error_setg(errp, "Invalid guest forwarding rule '%s'", config_str); |
| 1205 | return -1; |
| 1206 | } |
| 1207 | |
| 1208 | UsernetInfoList *qmp_x_query_usernet(Error **errp) |
| 1209 | { |
| 1210 | UsernetInfoList *head = NULL, **tail = &head; |
| 1211 | SlirpState *s; |
| 1212 | |
| 1213 | QTAILQ_FOREACH(s, &slirp_stacks, entry) { |
| 1214 | UsernetInfo *ui = g_new0(UsernetInfo, 1); |
| 1215 | int id; |
| 1216 | |
| 1217 | if (net_hub_id_for_client(&s->nc, &id) == 0) { |
| 1218 | ui->has_hub_id = true; |
| 1219 | ui->hub_id = id; |
| 1220 | } |
| 1221 | ui->hub_name = g_strdup(s->nc.name); |
| 1222 | ui->info = slirp_connection_info(s->slirp); |
| 1223 | |
| 1224 | QAPI_LIST_APPEND(tail, ui); |
| 1225 | } |
| 1226 | |
| 1227 | return head; |
| 1228 | } |
| 1229 | |
| 1230 | #ifdef CONFIG_HMP |
| 1231 | void hmp_info_usernet(MonitorHMP *hmp, const QDict *qdict) |
| 1232 | { |
| 1233 | g_autoptr(UsernetInfoList) list = NULL; |
| 1234 | UsernetInfoList *entry; |
| 1235 | |
| 1236 | list = qmp_x_query_usernet(&error_abort); |
| 1237 | for (entry = list; entry; entry = entry->next) { |
| 1238 | UsernetInfo *ui = entry->value; |
| 1239 | monitor_hmp_printf(hmp, "Hub %d (%s):\n%s", |
| 1240 | ui->has_hub_id ? (int)ui->hub_id : -1, |
| 1241 | ui->hub_name, ui->info); |
| 1242 | } |
| 1243 | } |
| 1244 | #endif |
| 1245 | |
| 1246 | static void |
| 1247 | net_init_slirp_configs_host(const NetdevUserHostForwardList *fwd) |
| 1248 | { |
| 1249 | while (fwd) { |
| 1250 | struct slirp_config_str *config; |
| 1251 | |
| 1252 | config = g_malloc0(sizeof(*config)); |
| 1253 | pstrcpy(config->str, sizeof(config->str), fwd->value->str); |
| 1254 | config->flags = SLIRP_CFG_HOSTFWD; |
| 1255 | config->next = slirp_configs; |
| 1256 | slirp_configs = config; |
| 1257 | |
| 1258 | fwd = fwd->next; |
| 1259 | } |
| 1260 | } |
| 1261 | |
| 1262 | static void |
| 1263 | net_init_slirp_configs_guest(const NetdevUserGuestForwardList *fwd) |
| 1264 | { |
| 1265 | while (fwd) { |
| 1266 | struct slirp_config_str *config; |
| 1267 | |
| 1268 | config = g_malloc0(sizeof(*config)); |
| 1269 | pstrcpy(config->str, sizeof(config->str), fwd->value->str); |
| 1270 | config->next = slirp_configs; |
| 1271 | slirp_configs = config; |
| 1272 | |
| 1273 | fwd = fwd->next; |
| 1274 | } |
| 1275 | } |
| 1276 | |
| 1277 | static const char **slirp_dnssearch(const NetdevUserDomainSuffixList *dnsname) |
| 1278 | { |
| 1279 | const NetdevUserDomainSuffixList *c = dnsname; |
| 1280 | size_t i = 0, num_opts = 0; |
| 1281 | const char **ret; |
| 1282 | |
| 1283 | while (c) { |
| 1284 | num_opts++; |
| 1285 | c = c->next; |
| 1286 | } |
| 1287 | |
| 1288 | if (num_opts == 0) { |
| 1289 | return NULL; |
| 1290 | } |
| 1291 | |
| 1292 | ret = g_malloc((num_opts + 1) * sizeof(*ret)); |
| 1293 | c = dnsname; |
| 1294 | while (c) { |
| 1295 | ret[i++] = c->value->str; |
| 1296 | c = c->next; |
| 1297 | } |
| 1298 | ret[i] = NULL; |
| 1299 | return ret; |
| 1300 | } |
| 1301 | |
| 1302 | int net_init_slirp(const Netdev *netdev, const char *name, |
| 1303 | NetClientState *peer, Error **errp) |
| 1304 | { |
| 1305 | struct slirp_config_str *config; |
| 1306 | char *vnet; |
| 1307 | int ret; |
| 1308 | const NetdevUserOptions *user; |
| 1309 | const char **dnssearch; |
| 1310 | bool ipv4 = true, ipv6 = true; |
| 1311 | |
| 1312 | assert(netdev->type == NET_CLIENT_DRIVER_USER); |
| 1313 | user = &netdev->u.user; |
| 1314 | |
| 1315 | if ((user->has_ipv6 && user->ipv6 && !user->has_ipv4) || |
| 1316 | (user->has_ipv4 && !user->ipv4)) { |
| 1317 | ipv4 = 0; |
| 1318 | } |
| 1319 | if ((user->has_ipv4 && user->ipv4 && !user->has_ipv6) || |
| 1320 | (user->has_ipv6 && !user->ipv6)) { |
| 1321 | ipv6 = 0; |
| 1322 | } |
| 1323 | |
| 1324 | vnet = user->net ? g_strdup(user->net) : |
| 1325 | user->ip ? g_strdup_printf("%s/24", user->ip) : |
| 1326 | NULL; |
| 1327 | |
| 1328 | dnssearch = slirp_dnssearch(user->dnssearch); |
| 1329 | |
| 1330 | /* all optional fields are initialized to "all bits zero" */ |
| 1331 | |
| 1332 | net_init_slirp_configs_host(user->hostfwd); |
| 1333 | net_init_slirp_configs_guest(user->guestfwd); |
| 1334 | |
| 1335 | ret = net_slirp_init(peer, "user", name, user->q_restrict, |
| 1336 | ipv4, vnet, user->host, |
| 1337 | ipv6, user->ipv6_prefix, user->ipv6_prefixlen, |
| 1338 | user->ipv6_host, user->hostname, user->tftp, |
| 1339 | user->bootfile, user->dhcpstart, |
| 1340 | user->dns, user->ipv6_dns, user->smb, |
| 1341 | user->smbserver, dnssearch, user->domainname, |
| 1342 | user->tftp_server_name, errp); |
| 1343 | |
| 1344 | while (slirp_configs) { |
| 1345 | config = slirp_configs; |
| 1346 | slirp_configs = config->next; |
| 1347 | g_free(config); |
| 1348 | } |
| 1349 | |
| 1350 | g_free(vnet); |
| 1351 | g_free(dnssearch); |
| 1352 | |
| 1353 | return ret; |
| 1354 | } |