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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 "qemu/error-report.h" | |
40 | #include "qemu/sockets.h" | |
41 | #include <libslirp.h> | |
42 | #include "chardev/char-fe.h" | |
43 | #include "sysemu/sysemu.h" | |
44 | #include "qemu/cutils.h" | |
45 | #include "qapi/error.h" | |
46 | #include "qapi/qmp/qdict.h" | |
47 | #include "util.h" | |
48 | #include "migration/register.h" | |
49 | #include "migration/qemu-file-types.h" | |
50 | ||
51 | static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) | |
52 | { | |
53 | const char *p, *p1; | |
54 | int len; | |
55 | p = *pp; | |
56 | p1 = strchr(p, sep); | |
57 | if (!p1) | |
58 | return -1; | |
59 | len = p1 - p; | |
60 | p1++; | |
61 | if (buf_size > 0) { | |
62 | if (len > buf_size - 1) | |
63 | len = buf_size - 1; | |
64 | memcpy(buf, p, len); | |
65 | buf[len] = '\0'; | |
66 | } | |
67 | *pp = p1; | |
68 | return 0; | |
69 | } | |
70 | ||
71 | /* slirp network adapter */ | |
72 | ||
73 | #define SLIRP_CFG_HOSTFWD 1 | |
74 | ||
75 | struct slirp_config_str { | |
76 | struct slirp_config_str *next; | |
77 | int flags; | |
78 | char str[1024]; | |
79 | }; | |
80 | ||
81 | struct GuestFwd { | |
82 | CharBackend hd; | |
83 | struct in_addr server; | |
84 | int port; | |
85 | Slirp *slirp; | |
86 | }; | |
87 | ||
88 | typedef struct SlirpState { | |
89 | NetClientState nc; | |
90 | QTAILQ_ENTRY(SlirpState) entry; | |
91 | Slirp *slirp; | |
92 | Notifier poll_notifier; | |
93 | Notifier exit_notifier; | |
94 | #if defined(CONFIG_SMBD_COMMAND) | |
95 | gchar *smb_dir; | |
96 | #endif | |
97 | GSList *fwd; | |
98 | } SlirpState; | |
99 | ||
100 | static struct slirp_config_str *slirp_configs; | |
101 | static QTAILQ_HEAD(, SlirpState) slirp_stacks = | |
102 | QTAILQ_HEAD_INITIALIZER(slirp_stacks); | |
103 | ||
104 | static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp); | |
105 | static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp); | |
106 | ||
107 | #if defined(CONFIG_SMBD_COMMAND) | |
108 | static int slirp_smb(SlirpState *s, const char *exported_dir, | |
109 | struct in_addr vserver_addr, Error **errp); | |
110 | static void slirp_smb_cleanup(SlirpState *s); | |
111 | #else | |
112 | static inline void slirp_smb_cleanup(SlirpState *s) { } | |
113 | #endif | |
114 | ||
115 | static ssize_t net_slirp_send_packet(const void *pkt, size_t pkt_len, | |
116 | void *opaque) | |
117 | { | |
118 | SlirpState *s = opaque; | |
119 | uint8_t min_pkt[ETH_ZLEN]; | |
120 | size_t min_pktsz = sizeof(min_pkt); | |
121 | ||
122 | if (net_peer_needs_padding(&s->nc)) { | |
123 | if (eth_pad_short_frame(min_pkt, &min_pktsz, pkt, pkt_len)) { | |
124 | pkt = min_pkt; | |
125 | pkt_len = min_pktsz; | |
126 | } | |
127 | } | |
128 | ||
129 | return qemu_send_packet(&s->nc, pkt, pkt_len); | |
130 | } | |
131 | ||
132 | static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size) | |
133 | { | |
134 | SlirpState *s = DO_UPCAST(SlirpState, nc, nc); | |
135 | ||
136 | slirp_input(s->slirp, buf, size); | |
137 | ||
138 | return size; | |
139 | } | |
140 | ||
141 | static void slirp_smb_exit(Notifier *n, void *data) | |
142 | { | |
143 | SlirpState *s = container_of(n, SlirpState, exit_notifier); | |
144 | slirp_smb_cleanup(s); | |
145 | } | |
146 | ||
147 | static void slirp_free_fwd(gpointer data) | |
148 | { | |
149 | struct GuestFwd *fwd = data; | |
150 | ||
151 | qemu_chr_fe_deinit(&fwd->hd, true); | |
152 | g_free(data); | |
153 | } | |
154 | ||
155 | static void net_slirp_cleanup(NetClientState *nc) | |
156 | { | |
157 | SlirpState *s = DO_UPCAST(SlirpState, nc, nc); | |
158 | ||
159 | g_slist_free_full(s->fwd, slirp_free_fwd); | |
160 | main_loop_poll_remove_notifier(&s->poll_notifier); | |
161 | unregister_savevm(NULL, "slirp", s->slirp); | |
162 | slirp_cleanup(s->slirp); | |
163 | if (s->exit_notifier.notify) { | |
164 | qemu_remove_exit_notifier(&s->exit_notifier); | |
165 | } | |
166 | slirp_smb_cleanup(s); | |
167 | QTAILQ_REMOVE(&slirp_stacks, s, entry); | |
168 | } | |
169 | ||
170 | static NetClientInfo net_slirp_info = { | |
171 | .type = NET_CLIENT_DRIVER_USER, | |
172 | .size = sizeof(SlirpState), | |
173 | .receive = net_slirp_receive, | |
174 | .cleanup = net_slirp_cleanup, | |
175 | }; | |
176 | ||
177 | static void net_slirp_guest_error(const char *msg, void *opaque) | |
178 | { | |
179 | qemu_log_mask(LOG_GUEST_ERROR, "%s", msg); | |
180 | } | |
181 | ||
182 | static int64_t net_slirp_clock_get_ns(void *opaque) | |
183 | { | |
184 | return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | |
185 | } | |
186 | ||
187 | typedef struct SlirpTimer SlirpTimer; | |
188 | struct SlirpTimer { | |
189 | QEMUTimer timer; | |
190 | #if SLIRP_CHECK_VERSION(4,7,0) | |
191 | Slirp *slirp; | |
192 | SlirpTimerId id; | |
193 | void *cb_opaque; | |
194 | #endif | |
195 | }; | |
196 | ||
197 | #if SLIRP_CHECK_VERSION(4,7,0) | |
198 | static void net_slirp_init_completed(Slirp *slirp, void *opaque) | |
199 | { | |
200 | SlirpState *s = opaque; | |
201 | s->slirp = slirp; | |
202 | } | |
203 | ||
204 | static void net_slirp_timer_cb(void *opaque) | |
205 | { | |
206 | SlirpTimer *t = opaque; | |
207 | slirp_handle_timer(t->slirp, t->id, t->cb_opaque); | |
208 | } | |
209 | ||
210 | static void *net_slirp_timer_new_opaque(SlirpTimerId id, | |
211 | void *cb_opaque, void *opaque) | |
212 | { | |
213 | SlirpState *s = opaque; | |
214 | SlirpTimer *t = g_new(SlirpTimer, 1); | |
215 | t->slirp = s->slirp; | |
216 | t->id = id; | |
217 | t->cb_opaque = cb_opaque; | |
218 | timer_init_full(&t->timer, NULL, QEMU_CLOCK_VIRTUAL, | |
219 | SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL, | |
220 | net_slirp_timer_cb, t); | |
221 | return t; | |
222 | } | |
223 | #else | |
224 | static void *net_slirp_timer_new(SlirpTimerCb cb, | |
225 | void *cb_opaque, void *opaque) | |
226 | { | |
227 | SlirpTimer *t = g_new(SlirpTimer, 1); | |
228 | timer_init_full(&t->timer, NULL, QEMU_CLOCK_VIRTUAL, | |
229 | SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL, | |
230 | cb, cb_opaque); | |
231 | return t; | |
232 | } | |
233 | #endif | |
234 | ||
235 | static void net_slirp_timer_free(void *timer, void *opaque) | |
236 | { | |
237 | SlirpTimer *t = timer; | |
238 | timer_del(&t->timer); | |
239 | g_free(t); | |
240 | } | |
241 | ||
242 | static void net_slirp_timer_mod(void *timer, int64_t expire_timer, | |
243 | void *opaque) | |
244 | { | |
245 | SlirpTimer *t = timer; | |
246 | timer_mod(&t->timer, expire_timer); | |
247 | } | |
248 | ||
249 | static void net_slirp_register_poll_fd(int fd, void *opaque) | |
250 | { | |
251 | #ifdef WIN32 | |
252 | AioContext *ctxt = qemu_get_aio_context(); | |
253 | ||
254 | if (WSAEventSelect(fd, event_notifier_get_handle(&ctxt->notifier), | |
255 | FD_READ | FD_ACCEPT | FD_CLOSE | | |
256 | FD_CONNECT | FD_WRITE | FD_OOB) != 0) { | |
257 | error_setg_win32(&error_warn, WSAGetLastError(), "failed to WSAEventSelect()"); | |
258 | } | |
259 | #endif | |
260 | } | |
261 | ||
262 | static void net_slirp_unregister_poll_fd(int fd, void *opaque) | |
263 | { | |
264 | #ifdef WIN32 | |
265 | if (WSAEventSelect(fd, NULL, 0) != 0) { | |
266 | error_setg_win32(&error_warn, WSAGetLastError(), "failed to WSAEventSelect()"); | |
267 | } | |
268 | #endif | |
269 | } | |
270 | ||
271 | static void net_slirp_notify(void *opaque) | |
272 | { | |
273 | qemu_notify_event(); | |
274 | } | |
275 | ||
276 | static const SlirpCb slirp_cb = { | |
277 | .send_packet = net_slirp_send_packet, | |
278 | .guest_error = net_slirp_guest_error, | |
279 | .clock_get_ns = net_slirp_clock_get_ns, | |
280 | #if SLIRP_CHECK_VERSION(4,7,0) | |
281 | .init_completed = net_slirp_init_completed, | |
282 | .timer_new_opaque = net_slirp_timer_new_opaque, | |
283 | #else | |
284 | .timer_new = net_slirp_timer_new, | |
285 | #endif | |
286 | .timer_free = net_slirp_timer_free, | |
287 | .timer_mod = net_slirp_timer_mod, | |
288 | .register_poll_fd = net_slirp_register_poll_fd, | |
289 | .unregister_poll_fd = net_slirp_unregister_poll_fd, | |
290 | .notify = net_slirp_notify, | |
291 | }; | |
292 | ||
293 | static int slirp_poll_to_gio(int events) | |
294 | { | |
295 | int ret = 0; | |
296 | ||
297 | if (events & SLIRP_POLL_IN) { | |
298 | ret |= G_IO_IN; | |
299 | } | |
300 | if (events & SLIRP_POLL_OUT) { | |
301 | ret |= G_IO_OUT; | |
302 | } | |
303 | if (events & SLIRP_POLL_PRI) { | |
304 | ret |= G_IO_PRI; | |
305 | } | |
306 | if (events & SLIRP_POLL_ERR) { | |
307 | ret |= G_IO_ERR; | |
308 | } | |
309 | if (events & SLIRP_POLL_HUP) { | |
310 | ret |= G_IO_HUP; | |
311 | } | |
312 | ||
313 | return ret; | |
314 | } | |
315 | ||
316 | static int net_slirp_add_poll(int fd, int events, void *opaque) | |
317 | { | |
318 | GArray *pollfds = opaque; | |
319 | GPollFD pfd = { | |
320 | .fd = fd, | |
321 | .events = slirp_poll_to_gio(events), | |
322 | }; | |
323 | int idx = pollfds->len; | |
324 | g_array_append_val(pollfds, pfd); | |
325 | return idx; | |
326 | } | |
327 | ||
328 | static int slirp_gio_to_poll(int events) | |
329 | { | |
330 | int ret = 0; | |
331 | ||
332 | if (events & G_IO_IN) { | |
333 | ret |= SLIRP_POLL_IN; | |
334 | } | |
335 | if (events & G_IO_OUT) { | |
336 | ret |= SLIRP_POLL_OUT; | |
337 | } | |
338 | if (events & G_IO_PRI) { | |
339 | ret |= SLIRP_POLL_PRI; | |
340 | } | |
341 | if (events & G_IO_ERR) { | |
342 | ret |= SLIRP_POLL_ERR; | |
343 | } | |
344 | if (events & G_IO_HUP) { | |
345 | ret |= SLIRP_POLL_HUP; | |
346 | } | |
347 | ||
348 | return ret; | |
349 | } | |
350 | ||
351 | static int net_slirp_get_revents(int idx, void *opaque) | |
352 | { | |
353 | GArray *pollfds = opaque; | |
354 | ||
355 | return slirp_gio_to_poll(g_array_index(pollfds, GPollFD, idx).revents); | |
356 | } | |
357 | ||
358 | static void net_slirp_poll_notify(Notifier *notifier, void *data) | |
359 | { | |
360 | MainLoopPoll *poll = data; | |
361 | SlirpState *s = container_of(notifier, SlirpState, poll_notifier); | |
362 | ||
363 | switch (poll->state) { | |
364 | case MAIN_LOOP_POLL_FILL: | |
365 | slirp_pollfds_fill(s->slirp, &poll->timeout, | |
366 | net_slirp_add_poll, poll->pollfds); | |
367 | break; | |
368 | case MAIN_LOOP_POLL_OK: | |
369 | case MAIN_LOOP_POLL_ERR: | |
370 | slirp_pollfds_poll(s->slirp, poll->state == MAIN_LOOP_POLL_ERR, | |
371 | net_slirp_get_revents, poll->pollfds); | |
372 | break; | |
373 | default: | |
374 | g_assert_not_reached(); | |
375 | } | |
376 | } | |
377 | ||
378 | static ssize_t | |
379 | net_slirp_stream_read(void *buf, size_t size, void *opaque) | |
380 | { | |
381 | QEMUFile *f = opaque; | |
382 | ||
383 | return qemu_get_buffer(f, buf, size); | |
384 | } | |
385 | ||
386 | static ssize_t | |
387 | net_slirp_stream_write(const void *buf, size_t size, void *opaque) | |
388 | { | |
389 | QEMUFile *f = opaque; | |
390 | ||
391 | qemu_put_buffer(f, buf, size); | |
392 | if (qemu_file_get_error(f)) { | |
393 | return -1; | |
394 | } | |
395 | ||
396 | return size; | |
397 | } | |
398 | ||
399 | static int net_slirp_state_load(QEMUFile *f, void *opaque, int version_id) | |
400 | { | |
401 | Slirp *slirp = opaque; | |
402 | ||
403 | return slirp_state_load(slirp, version_id, net_slirp_stream_read, f); | |
404 | } | |
405 | ||
406 | static void net_slirp_state_save(QEMUFile *f, void *opaque) | |
407 | { | |
408 | Slirp *slirp = opaque; | |
409 | ||
410 | slirp_state_save(slirp, net_slirp_stream_write, f); | |
411 | } | |
412 | ||
413 | static SaveVMHandlers savevm_slirp_state = { | |
414 | .save_state = net_slirp_state_save, | |
415 | .load_state = net_slirp_state_load, | |
416 | }; | |
417 | ||
418 | static int net_slirp_init(NetClientState *peer, const char *model, | |
419 | const char *name, int restricted, | |
420 | bool ipv4, const char *vnetwork, const char *vhost, | |
421 | bool ipv6, const char *vprefix6, int vprefix6_len, | |
422 | const char *vhost6, | |
423 | const char *vhostname, const char *tftp_export, | |
424 | const char *bootfile, const char *vdhcp_start, | |
425 | const char *vnameserver, const char *vnameserver6, | |
426 | const char *smb_export, const char *vsmbserver, | |
427 | const char **dnssearch, const char *vdomainname, | |
428 | const char *tftp_server_name, | |
429 | Error **errp) | |
430 | { | |
431 | /* default settings according to historic slirp */ | |
432 | struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */ | |
433 | struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */ | |
434 | struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */ | |
435 | struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */ | |
436 | struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */ | |
437 | struct in6_addr ip6_prefix; | |
438 | struct in6_addr ip6_host; | |
439 | struct in6_addr ip6_dns; | |
440 | #if defined(CONFIG_SMBD_COMMAND) | |
441 | struct in_addr smbsrv = { .s_addr = 0 }; | |
442 | #endif | |
443 | SlirpConfig cfg = { 0 }; | |
444 | NetClientState *nc; | |
445 | SlirpState *s; | |
446 | char buf[20]; | |
447 | uint32_t addr; | |
448 | int shift; | |
449 | char *end; | |
450 | struct slirp_config_str *config; | |
451 | ||
452 | if (!ipv4 && (vnetwork || vhost || vnameserver)) { | |
453 | error_setg(errp, "IPv4 disabled but netmask/host/dns provided"); | |
454 | return -1; | |
455 | } | |
456 | ||
457 | if (!ipv6 && (vprefix6 || vhost6 || vnameserver6)) { | |
458 | error_setg(errp, "IPv6 disabled but prefix/host6/dns6 provided"); | |
459 | return -1; | |
460 | } | |
461 | ||
462 | if (!ipv4 && !ipv6) { | |
463 | /* It doesn't make sense to disable both */ | |
464 | error_setg(errp, "IPv4 and IPv6 disabled"); | |
465 | return -1; | |
466 | } | |
467 | ||
468 | if (vnetwork) { | |
469 | if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) { | |
470 | if (!inet_aton(vnetwork, &net)) { | |
471 | error_setg(errp, "Failed to parse netmask"); | |
472 | return -1; | |
473 | } | |
474 | addr = ntohl(net.s_addr); | |
475 | if (!(addr & 0x80000000)) { | |
476 | mask.s_addr = htonl(0xff000000); /* class A */ | |
477 | } else if ((addr & 0xfff00000) == 0xac100000) { | |
478 | mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */ | |
479 | } else if ((addr & 0xc0000000) == 0x80000000) { | |
480 | mask.s_addr = htonl(0xffff0000); /* class B */ | |
481 | } else if ((addr & 0xffff0000) == 0xc0a80000) { | |
482 | mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */ | |
483 | } else if ((addr & 0xffff0000) == 0xc6120000) { | |
484 | mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */ | |
485 | } else if ((addr & 0xe0000000) == 0xe0000000) { | |
486 | mask.s_addr = htonl(0xffffff00); /* class C */ | |
487 | } else { | |
488 | mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */ | |
489 | } | |
490 | } else { | |
491 | if (!inet_aton(buf, &net)) { | |
492 | error_setg(errp, "Failed to parse netmask"); | |
493 | return -1; | |
494 | } | |
495 | shift = strtol(vnetwork, &end, 10); | |
496 | if (*end != '\0') { | |
497 | if (!inet_aton(vnetwork, &mask)) { | |
498 | error_setg(errp, | |
499 | "Failed to parse netmask (trailing chars)"); | |
500 | return -1; | |
501 | } | |
502 | } else if (shift < 4 || shift > 32) { | |
503 | error_setg(errp, | |
504 | "Invalid netmask provided (must be in range 4-32)"); | |
505 | return -1; | |
506 | } else { | |
507 | mask.s_addr = htonl(0xffffffff << (32 - shift)); | |
508 | } | |
509 | } | |
510 | net.s_addr &= mask.s_addr; | |
511 | host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr); | |
512 | dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr); | |
513 | dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr); | |
514 | } | |
515 | ||
516 | if (vhost && !inet_aton(vhost, &host)) { | |
517 | error_setg(errp, "Failed to parse host"); | |
518 | return -1; | |
519 | } | |
520 | if ((host.s_addr & mask.s_addr) != net.s_addr) { | |
521 | error_setg(errp, "Host doesn't belong to network"); | |
522 | return -1; | |
523 | } | |
524 | ||
525 | if (vnameserver && !inet_aton(vnameserver, &dns)) { | |
526 | error_setg(errp, "Failed to parse DNS"); | |
527 | return -1; | |
528 | } | |
529 | if (restricted && (dns.s_addr & mask.s_addr) != net.s_addr) { | |
530 | error_setg(errp, "DNS doesn't belong to network"); | |
531 | return -1; | |
532 | } | |
533 | if (dns.s_addr == host.s_addr) { | |
534 | error_setg(errp, "DNS must be different from host"); | |
535 | return -1; | |
536 | } | |
537 | ||
538 | if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) { | |
539 | error_setg(errp, "Failed to parse DHCP start address"); | |
540 | return -1; | |
541 | } | |
542 | if ((dhcp.s_addr & mask.s_addr) != net.s_addr) { | |
543 | error_setg(errp, "DHCP doesn't belong to network"); | |
544 | return -1; | |
545 | } | |
546 | if (dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) { | |
547 | error_setg(errp, "DHCP must be different from host and DNS"); | |
548 | return -1; | |
549 | } | |
550 | ||
551 | #if defined(CONFIG_SMBD_COMMAND) | |
552 | if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) { | |
553 | error_setg(errp, "Failed to parse SMB address"); | |
554 | return -1; | |
555 | } | |
556 | #endif | |
557 | ||
558 | if (!vprefix6) { | |
559 | vprefix6 = "fec0::"; | |
560 | } | |
561 | if (!inet_pton(AF_INET6, vprefix6, &ip6_prefix)) { | |
562 | error_setg(errp, "Failed to parse IPv6 prefix"); | |
563 | return -1; | |
564 | } | |
565 | ||
566 | if (!vprefix6_len) { | |
567 | vprefix6_len = 64; | |
568 | } | |
569 | if (vprefix6_len < 0 || vprefix6_len > 126) { | |
570 | error_setg(errp, | |
571 | "Invalid IPv6 prefix provided " | |
572 | "(IPv6 prefix length must be between 0 and 126)"); | |
573 | return -1; | |
574 | } | |
575 | ||
576 | if (vhost6) { | |
577 | if (!inet_pton(AF_INET6, vhost6, &ip6_host)) { | |
578 | error_setg(errp, "Failed to parse IPv6 host"); | |
579 | return -1; | |
580 | } | |
581 | if (!in6_equal_net(&ip6_prefix, &ip6_host, vprefix6_len)) { | |
582 | error_setg(errp, "IPv6 Host doesn't belong to network"); | |
583 | return -1; | |
584 | } | |
585 | } else { | |
586 | ip6_host = ip6_prefix; | |
587 | ip6_host.s6_addr[15] |= 2; | |
588 | } | |
589 | ||
590 | if (vnameserver6) { | |
591 | if (!inet_pton(AF_INET6, vnameserver6, &ip6_dns)) { | |
592 | error_setg(errp, "Failed to parse IPv6 DNS"); | |
593 | return -1; | |
594 | } | |
595 | if (restricted && !in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) { | |
596 | error_setg(errp, "IPv6 DNS doesn't belong to network"); | |
597 | return -1; | |
598 | } | |
599 | } else { | |
600 | ip6_dns = ip6_prefix; | |
601 | ip6_dns.s6_addr[15] |= 3; | |
602 | } | |
603 | ||
604 | if (vdomainname && !*vdomainname) { | |
605 | error_setg(errp, "'domainname' parameter cannot be empty"); | |
606 | return -1; | |
607 | } | |
608 | ||
609 | if (vdomainname && strlen(vdomainname) > 255) { | |
610 | error_setg(errp, "'domainname' parameter cannot exceed 255 bytes"); | |
611 | return -1; | |
612 | } | |
613 | ||
614 | if (vhostname && strlen(vhostname) > 255) { | |
615 | error_setg(errp, "'vhostname' parameter cannot exceed 255 bytes"); | |
616 | return -1; | |
617 | } | |
618 | ||
619 | if (tftp_server_name && strlen(tftp_server_name) > 255) { | |
620 | error_setg(errp, "'tftp-server-name' parameter cannot exceed 255 bytes"); | |
621 | return -1; | |
622 | } | |
623 | ||
624 | nc = qemu_new_net_client(&net_slirp_info, peer, model, name); | |
625 | ||
626 | qemu_set_info_str(nc, "net=%s,restrict=%s", inet_ntoa(net), | |
627 | restricted ? "on" : "off"); | |
628 | ||
629 | s = DO_UPCAST(SlirpState, nc, nc); | |
630 | ||
631 | cfg.version = SLIRP_CHECK_VERSION(4,7,0) ? 4 : 1; | |
632 | cfg.restricted = restricted; | |
633 | cfg.in_enabled = ipv4; | |
634 | cfg.vnetwork = net; | |
635 | cfg.vnetmask = mask; | |
636 | cfg.vhost = host; | |
637 | cfg.in6_enabled = ipv6; | |
638 | cfg.vprefix_addr6 = ip6_prefix; | |
639 | cfg.vprefix_len = vprefix6_len; | |
640 | cfg.vhost6 = ip6_host; | |
641 | cfg.vhostname = vhostname; | |
642 | cfg.tftp_server_name = tftp_server_name; | |
643 | cfg.tftp_path = tftp_export; | |
644 | cfg.bootfile = bootfile; | |
645 | cfg.vdhcp_start = dhcp; | |
646 | cfg.vnameserver = dns; | |
647 | cfg.vnameserver6 = ip6_dns; | |
648 | cfg.vdnssearch = dnssearch; | |
649 | cfg.vdomainname = vdomainname; | |
650 | s->slirp = slirp_new(&cfg, &slirp_cb, s); | |
651 | QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry); | |
652 | ||
653 | /* | |
654 | * Make sure the current bitstream version of slirp is 4, to avoid | |
655 | * QEMU migration incompatibilities, if upstream slirp bumped the | |
656 | * version. | |
657 | * | |
658 | * FIXME: use bitfields of features? teach libslirp to save with | |
659 | * specific version? | |
660 | */ | |
661 | g_assert(slirp_state_version() == 4); | |
662 | register_savevm_live("slirp", 0, slirp_state_version(), | |
663 | &savevm_slirp_state, s->slirp); | |
664 | ||
665 | s->poll_notifier.notify = net_slirp_poll_notify; | |
666 | main_loop_poll_add_notifier(&s->poll_notifier); | |
667 | ||
668 | for (config = slirp_configs; config; config = config->next) { | |
669 | if (config->flags & SLIRP_CFG_HOSTFWD) { | |
670 | if (slirp_hostfwd(s, config->str, errp) < 0) { | |
671 | goto error; | |
672 | } | |
673 | } else { | |
674 | if (slirp_guestfwd(s, config->str, errp) < 0) { | |
675 | goto error; | |
676 | } | |
677 | } | |
678 | } | |
679 | #if defined(CONFIG_SMBD_COMMAND) | |
680 | if (smb_export) { | |
681 | if (slirp_smb(s, smb_export, smbsrv, errp) < 0) { | |
682 | goto error; | |
683 | } | |
684 | } | |
685 | #endif | |
686 | ||
687 | s->exit_notifier.notify = slirp_smb_exit; | |
688 | qemu_add_exit_notifier(&s->exit_notifier); | |
689 | return 0; | |
690 | ||
691 | error: | |
692 | qemu_del_net_client(nc); | |
693 | return -1; | |
694 | } | |
695 | ||
696 | static SlirpState *slirp_lookup(Monitor *mon, const char *id) | |
697 | { | |
698 | if (id) { | |
699 | NetClientState *nc = qemu_find_netdev(id); | |
700 | if (!nc) { | |
701 | monitor_printf(mon, "unrecognized netdev id '%s'\n", id); | |
702 | return NULL; | |
703 | } | |
704 | if (strcmp(nc->model, "user")) { | |
705 | monitor_printf(mon, "invalid device specified\n"); | |
706 | return NULL; | |
707 | } | |
708 | return DO_UPCAST(SlirpState, nc, nc); | |
709 | } else { | |
710 | if (QTAILQ_EMPTY(&slirp_stacks)) { | |
711 | monitor_printf(mon, "user mode network stack not in use\n"); | |
712 | return NULL; | |
713 | } | |
714 | return QTAILQ_FIRST(&slirp_stacks); | |
715 | } | |
716 | } | |
717 | ||
718 | void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict) | |
719 | { | |
720 | struct in_addr host_addr = { .s_addr = INADDR_ANY }; | |
721 | int host_port; | |
722 | char buf[256]; | |
723 | const char *src_str, *p; | |
724 | SlirpState *s; | |
725 | int is_udp = 0; | |
726 | int err; | |
727 | const char *arg1 = qdict_get_str(qdict, "arg1"); | |
728 | const char *arg2 = qdict_get_try_str(qdict, "arg2"); | |
729 | ||
730 | if (arg2) { | |
731 | s = slirp_lookup(mon, arg1); | |
732 | src_str = arg2; | |
733 | } else { | |
734 | s = slirp_lookup(mon, NULL); | |
735 | src_str = arg1; | |
736 | } | |
737 | if (!s) { | |
738 | return; | |
739 | } | |
740 | ||
741 | p = src_str; | |
742 | if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { | |
743 | goto fail_syntax; | |
744 | } | |
745 | ||
746 | if (!strcmp(buf, "tcp") || buf[0] == '\0') { | |
747 | is_udp = 0; | |
748 | } else if (!strcmp(buf, "udp")) { | |
749 | is_udp = 1; | |
750 | } else { | |
751 | goto fail_syntax; | |
752 | } | |
753 | ||
754 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { | |
755 | goto fail_syntax; | |
756 | } | |
757 | if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { | |
758 | goto fail_syntax; | |
759 | } | |
760 | ||
761 | if (qemu_strtoi(p, NULL, 10, &host_port)) { | |
762 | goto fail_syntax; | |
763 | } | |
764 | ||
765 | err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port); | |
766 | ||
767 | monitor_printf(mon, "host forwarding rule for %s %s\n", src_str, | |
768 | err ? "not found" : "removed"); | |
769 | return; | |
770 | ||
771 | fail_syntax: | |
772 | monitor_printf(mon, "invalid format\n"); | |
773 | } | |
774 | ||
775 | static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp) | |
776 | { | |
777 | struct in_addr host_addr = { .s_addr = INADDR_ANY }; | |
778 | struct in_addr guest_addr = { .s_addr = 0 }; | |
779 | int host_port, guest_port; | |
780 | const char *p; | |
781 | char buf[256]; | |
782 | int is_udp; | |
783 | char *end; | |
784 | const char *fail_reason = "Unknown reason"; | |
785 | ||
786 | p = redir_str; | |
787 | if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { | |
788 | fail_reason = "No : separators"; | |
789 | goto fail_syntax; | |
790 | } | |
791 | if (!strcmp(buf, "tcp") || buf[0] == '\0') { | |
792 | is_udp = 0; | |
793 | } else if (!strcmp(buf, "udp")) { | |
794 | is_udp = 1; | |
795 | } else { | |
796 | fail_reason = "Bad protocol name"; | |
797 | goto fail_syntax; | |
798 | } | |
799 | ||
800 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { | |
801 | fail_reason = "Missing : separator"; | |
802 | goto fail_syntax; | |
803 | } | |
804 | if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { | |
805 | fail_reason = "Bad host address"; | |
806 | goto fail_syntax; | |
807 | } | |
808 | ||
809 | if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { | |
810 | fail_reason = "Bad host port separator"; | |
811 | goto fail_syntax; | |
812 | } | |
813 | host_port = strtol(buf, &end, 0); | |
814 | if (*end != '\0' || host_port < 0 || host_port > 65535) { | |
815 | fail_reason = "Bad host port"; | |
816 | goto fail_syntax; | |
817 | } | |
818 | ||
819 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { | |
820 | fail_reason = "Missing guest address"; | |
821 | goto fail_syntax; | |
822 | } | |
823 | if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) { | |
824 | fail_reason = "Bad guest address"; | |
825 | goto fail_syntax; | |
826 | } | |
827 | ||
828 | guest_port = strtol(p, &end, 0); | |
829 | if (*end != '\0' || guest_port < 1 || guest_port > 65535) { | |
830 | fail_reason = "Bad guest port"; | |
831 | goto fail_syntax; | |
832 | } | |
833 | ||
834 | if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr, | |
835 | guest_port) < 0) { | |
836 | error_setg(errp, "Could not set up host forwarding rule '%s'", | |
837 | redir_str); | |
838 | return -1; | |
839 | } | |
840 | return 0; | |
841 | ||
842 | fail_syntax: | |
843 | error_setg(errp, "Invalid host forwarding rule '%s' (%s)", redir_str, | |
844 | fail_reason); | |
845 | return -1; | |
846 | } | |
847 | ||
848 | void hmp_hostfwd_add(Monitor *mon, const QDict *qdict) | |
849 | { | |
850 | const char *redir_str; | |
851 | SlirpState *s; | |
852 | const char *arg1 = qdict_get_str(qdict, "arg1"); | |
853 | const char *arg2 = qdict_get_try_str(qdict, "arg2"); | |
854 | ||
855 | if (arg2) { | |
856 | s = slirp_lookup(mon, arg1); | |
857 | redir_str = arg2; | |
858 | } else { | |
859 | s = slirp_lookup(mon, NULL); | |
860 | redir_str = arg1; | |
861 | } | |
862 | if (s) { | |
863 | Error *err = NULL; | |
864 | if (slirp_hostfwd(s, redir_str, &err) < 0) { | |
865 | error_report_err(err); | |
866 | } | |
867 | } | |
868 | ||
869 | } | |
870 | ||
871 | #if defined(CONFIG_SMBD_COMMAND) | |
872 | ||
873 | /* automatic user mode samba server configuration */ | |
874 | static void slirp_smb_cleanup(SlirpState *s) | |
875 | { | |
876 | int ret; | |
877 | ||
878 | if (s->smb_dir) { | |
879 | gchar *cmd = g_strdup_printf("rm -rf %s", s->smb_dir); | |
880 | ret = system(cmd); | |
881 | if (ret == -1 || !WIFEXITED(ret)) { | |
882 | error_report("'%s' failed.", cmd); | |
883 | } else if (WEXITSTATUS(ret)) { | |
884 | error_report("'%s' failed. Error code: %d", | |
885 | cmd, WEXITSTATUS(ret)); | |
886 | } | |
887 | g_free(cmd); | |
888 | g_free(s->smb_dir); | |
889 | s->smb_dir = NULL; | |
890 | } | |
891 | } | |
892 | ||
893 | static int slirp_smb(SlirpState* s, const char *exported_dir, | |
894 | struct in_addr vserver_addr, Error **errp) | |
895 | { | |
896 | char *smb_conf; | |
897 | char *smb_cmdline; | |
898 | struct passwd *passwd; | |
899 | FILE *f; | |
900 | ||
901 | passwd = getpwuid(geteuid()); | |
902 | if (!passwd) { | |
903 | error_setg(errp, "Failed to retrieve user name"); | |
904 | return -1; | |
905 | } | |
906 | ||
907 | if (access(CONFIG_SMBD_COMMAND, F_OK)) { | |
908 | error_setg(errp, "Could not find '%s', please install it", | |
909 | CONFIG_SMBD_COMMAND); | |
910 | return -1; | |
911 | } | |
912 | ||
913 | if (access(exported_dir, R_OK | X_OK)) { | |
914 | error_setg(errp, "Error accessing shared directory '%s': %s", | |
915 | exported_dir, strerror(errno)); | |
916 | return -1; | |
917 | } | |
918 | ||
919 | s->smb_dir = g_dir_make_tmp("qemu-smb.XXXXXX", NULL); | |
920 | if (!s->smb_dir) { | |
921 | error_setg(errp, "Could not create samba server dir"); | |
922 | return -1; | |
923 | } | |
924 | smb_conf = g_strdup_printf("%s/%s", s->smb_dir, "smb.conf"); | |
925 | ||
926 | f = fopen(smb_conf, "w"); | |
927 | if (!f) { | |
928 | slirp_smb_cleanup(s); | |
929 | error_setg(errp, | |
930 | "Could not create samba server configuration file '%s'", | |
931 | smb_conf); | |
932 | g_free(smb_conf); | |
933 | return -1; | |
934 | } | |
935 | fprintf(f, | |
936 | "[global]\n" | |
937 | "private dir=%s\n" | |
938 | "interfaces=127.0.0.1\n" | |
939 | "bind interfaces only=yes\n" | |
940 | "pid directory=%s\n" | |
941 | "lock directory=%s\n" | |
942 | "state directory=%s\n" | |
943 | "cache directory=%s\n" | |
944 | "ncalrpc dir=%s/ncalrpc\n" | |
945 | "log file=%s/log.smbd\n" | |
946 | "smb passwd file=%s/smbpasswd\n" | |
947 | "security = user\n" | |
948 | "map to guest = Bad User\n" | |
949 | "load printers = no\n" | |
950 | "printing = bsd\n" | |
951 | "disable spoolss = yes\n" | |
952 | "usershare max shares = 0\n" | |
953 | "[qemu]\n" | |
954 | "path=%s\n" | |
955 | "read only=no\n" | |
956 | "guest ok=yes\n" | |
957 | "force user=%s\n", | |
958 | s->smb_dir, | |
959 | s->smb_dir, | |
960 | s->smb_dir, | |
961 | s->smb_dir, | |
962 | s->smb_dir, | |
963 | s->smb_dir, | |
964 | s->smb_dir, | |
965 | s->smb_dir, | |
966 | exported_dir, | |
967 | passwd->pw_name | |
968 | ); | |
969 | fclose(f); | |
970 | ||
971 | smb_cmdline = g_strdup_printf("%s -l %s -s %s", | |
972 | CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf); | |
973 | g_free(smb_conf); | |
974 | ||
975 | if (slirp_add_exec(s->slirp, smb_cmdline, &vserver_addr, 139) < 0 || | |
976 | slirp_add_exec(s->slirp, smb_cmdline, &vserver_addr, 445) < 0) { | |
977 | slirp_smb_cleanup(s); | |
978 | g_free(smb_cmdline); | |
979 | error_setg(errp, "Conflicting/invalid smbserver address"); | |
980 | return -1; | |
981 | } | |
982 | g_free(smb_cmdline); | |
983 | return 0; | |
984 | } | |
985 | ||
986 | #endif /* defined(CONFIG_SMBD_COMMAND) */ | |
987 | ||
988 | static int guestfwd_can_read(void *opaque) | |
989 | { | |
990 | struct GuestFwd *fwd = opaque; | |
991 | return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port); | |
992 | } | |
993 | ||
994 | static void guestfwd_read(void *opaque, const uint8_t *buf, int size) | |
995 | { | |
996 | struct GuestFwd *fwd = opaque; | |
997 | slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size); | |
998 | } | |
999 | ||
1000 | static ssize_t guestfwd_write(const void *buf, size_t len, void *chr) | |
1001 | { | |
1002 | return qemu_chr_fe_write_all(chr, buf, len); | |
1003 | } | |
1004 | ||
1005 | static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp) | |
1006 | { | |
1007 | /* TODO: IPv6 */ | |
1008 | struct in_addr server = { .s_addr = 0 }; | |
1009 | struct GuestFwd *fwd; | |
1010 | const char *p; | |
1011 | char buf[128]; | |
1012 | char *end; | |
1013 | int port; | |
1014 | ||
1015 | p = config_str; | |
1016 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { | |
1017 | goto fail_syntax; | |
1018 | } | |
1019 | if (strcmp(buf, "tcp") && buf[0] != '\0') { | |
1020 | goto fail_syntax; | |
1021 | } | |
1022 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { | |
1023 | goto fail_syntax; | |
1024 | } | |
1025 | if (buf[0] != '\0' && !inet_aton(buf, &server)) { | |
1026 | goto fail_syntax; | |
1027 | } | |
1028 | if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { | |
1029 | goto fail_syntax; | |
1030 | } | |
1031 | port = strtol(buf, &end, 10); | |
1032 | if (*end != '\0' || port < 1 || port > 65535) { | |
1033 | goto fail_syntax; | |
1034 | } | |
1035 | ||
1036 | snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port); | |
1037 | ||
1038 | if (g_str_has_prefix(p, "cmd:")) { | |
1039 | if (slirp_add_exec(s->slirp, &p[4], &server, port) < 0) { | |
1040 | error_setg(errp, "Conflicting/invalid host:port in guest " | |
1041 | "forwarding rule '%s'", config_str); | |
1042 | return -1; | |
1043 | } | |
1044 | } else { | |
1045 | Error *err = NULL; | |
1046 | /* | |
1047 | * FIXME: sure we want to support implicit | |
1048 | * muxed monitors here? | |
1049 | */ | |
1050 | Chardev *chr = qemu_chr_new_mux_mon(buf, p, NULL); | |
1051 | ||
1052 | if (!chr) { | |
1053 | error_setg(errp, "Could not open guest forwarding device '%s'", | |
1054 | buf); | |
1055 | return -1; | |
1056 | } | |
1057 | ||
1058 | fwd = g_new(struct GuestFwd, 1); | |
1059 | qemu_chr_fe_init(&fwd->hd, chr, &err); | |
1060 | if (err) { | |
1061 | error_propagate(errp, err); | |
1062 | object_unparent(OBJECT(chr)); | |
1063 | g_free(fwd); | |
1064 | return -1; | |
1065 | } | |
1066 | ||
1067 | if (slirp_add_guestfwd(s->slirp, guestfwd_write, &fwd->hd, | |
1068 | &server, port) < 0) { | |
1069 | error_setg(errp, "Conflicting/invalid host:port in guest " | |
1070 | "forwarding rule '%s'", config_str); | |
1071 | qemu_chr_fe_deinit(&fwd->hd, true); | |
1072 | g_free(fwd); | |
1073 | return -1; | |
1074 | } | |
1075 | fwd->server = server; | |
1076 | fwd->port = port; | |
1077 | fwd->slirp = s->slirp; | |
1078 | ||
1079 | qemu_chr_fe_set_handlers(&fwd->hd, guestfwd_can_read, guestfwd_read, | |
1080 | NULL, NULL, fwd, NULL, true); | |
1081 | s->fwd = g_slist_append(s->fwd, fwd); | |
1082 | } | |
1083 | return 0; | |
1084 | ||
1085 | fail_syntax: | |
1086 | error_setg(errp, "Invalid guest forwarding rule '%s'", config_str); | |
1087 | return -1; | |
1088 | } | |
1089 | ||
1090 | void hmp_info_usernet(Monitor *mon, const QDict *qdict) | |
1091 | { | |
1092 | SlirpState *s; | |
1093 | ||
1094 | QTAILQ_FOREACH(s, &slirp_stacks, entry) { | |
1095 | int id; | |
1096 | bool got_hub_id = net_hub_id_for_client(&s->nc, &id) == 0; | |
1097 | char *info = slirp_connection_info(s->slirp); | |
1098 | monitor_printf(mon, "Hub %d (%s):\n%s", | |
1099 | got_hub_id ? id : -1, | |
1100 | s->nc.name, info); | |
1101 | g_free(info); | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | static void | |
1106 | net_init_slirp_configs(const StringList *fwd, int flags) | |
1107 | { | |
1108 | while (fwd) { | |
1109 | struct slirp_config_str *config; | |
1110 | ||
1111 | config = g_malloc0(sizeof(*config)); | |
1112 | pstrcpy(config->str, sizeof(config->str), fwd->value->str); | |
1113 | config->flags = flags; | |
1114 | config->next = slirp_configs; | |
1115 | slirp_configs = config; | |
1116 | ||
1117 | fwd = fwd->next; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | static const char **slirp_dnssearch(const StringList *dnsname) | |
1122 | { | |
1123 | const StringList *c = dnsname; | |
1124 | size_t i = 0, num_opts = 0; | |
1125 | const char **ret; | |
1126 | ||
1127 | while (c) { | |
1128 | num_opts++; | |
1129 | c = c->next; | |
1130 | } | |
1131 | ||
1132 | if (num_opts == 0) { | |
1133 | return NULL; | |
1134 | } | |
1135 | ||
1136 | ret = g_malloc((num_opts + 1) * sizeof(*ret)); | |
1137 | c = dnsname; | |
1138 | while (c) { | |
1139 | ret[i++] = c->value->str; | |
1140 | c = c->next; | |
1141 | } | |
1142 | ret[i] = NULL; | |
1143 | return ret; | |
1144 | } | |
1145 | ||
1146 | int net_init_slirp(const Netdev *netdev, const char *name, | |
1147 | NetClientState *peer, Error **errp) | |
1148 | { | |
1149 | struct slirp_config_str *config; | |
1150 | char *vnet; | |
1151 | int ret; | |
1152 | const NetdevUserOptions *user; | |
1153 | const char **dnssearch; | |
1154 | bool ipv4 = true, ipv6 = true; | |
1155 | ||
1156 | assert(netdev->type == NET_CLIENT_DRIVER_USER); | |
1157 | user = &netdev->u.user; | |
1158 | ||
1159 | if ((user->has_ipv6 && user->ipv6 && !user->has_ipv4) || | |
1160 | (user->has_ipv4 && !user->ipv4)) { | |
1161 | ipv4 = 0; | |
1162 | } | |
1163 | if ((user->has_ipv4 && user->ipv4 && !user->has_ipv6) || | |
1164 | (user->has_ipv6 && !user->ipv6)) { | |
1165 | ipv6 = 0; | |
1166 | } | |
1167 | ||
1168 | vnet = user->net ? g_strdup(user->net) : | |
1169 | user->ip ? g_strdup_printf("%s/24", user->ip) : | |
1170 | NULL; | |
1171 | ||
1172 | dnssearch = slirp_dnssearch(user->dnssearch); | |
1173 | ||
1174 | /* all optional fields are initialized to "all bits zero" */ | |
1175 | ||
1176 | net_init_slirp_configs(user->hostfwd, SLIRP_CFG_HOSTFWD); | |
1177 | net_init_slirp_configs(user->guestfwd, 0); | |
1178 | ||
1179 | ret = net_slirp_init(peer, "user", name, user->q_restrict, | |
1180 | ipv4, vnet, user->host, | |
1181 | ipv6, user->ipv6_prefix, user->ipv6_prefixlen, | |
1182 | user->ipv6_host, user->hostname, user->tftp, | |
1183 | user->bootfile, user->dhcpstart, | |
1184 | user->dns, user->ipv6_dns, user->smb, | |
1185 | user->smbserver, dnssearch, user->domainname, | |
1186 | user->tftp_server_name, errp); | |
1187 | ||
1188 | while (slirp_configs) { | |
1189 | config = slirp_configs; | |
1190 | slirp_configs = config->next; | |
1191 | g_free(config); | |
1192 | } | |
1193 | ||
1194 | g_free(vnet); | |
1195 | g_free(dnssearch); | |
1196 | ||
1197 | return ret; | |
1198 | } |