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Add operations to qlist to allow it to be used as a stack
[qemu.git] / net.c
blob9ea66e36fa8cf18ff8115005324f6c1cf324883d
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 <unistd.h>
25 #include <fcntl.h>
26 #include <signal.h>
27 #include <time.h>
28 #include <errno.h>
29 #include <sys/time.h>
30 #include <zlib.h>
31
32 /* Needed early for CONFIG_BSD etc. */
33 #include "config-host.h"
34
35 #ifndef _WIN32
36 #include <sys/times.h>
37 #include <sys/wait.h>
38 #include <termios.h>
39 #include <sys/mman.h>
40 #include <sys/ioctl.h>
41 #include <sys/resource.h>
42 #include <sys/socket.h>
43 #include <netinet/in.h>
44 #include <net/if.h>
45 #include <arpa/inet.h>
46 #include <dirent.h>
47 #include <netdb.h>
48 #include <sys/select.h>
49 #ifdef CONFIG_BSD
50 #include <sys/stat.h>
51 #if defined(__FreeBSD__) || defined(__DragonFly__)
52 #include <libutil.h>
53 #else
54 #include <util.h>
55 #endif
56 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
57 #include <freebsd/stdlib.h>
58 #else
59 #ifdef __linux__
60 #include <pty.h>
61 #include <malloc.h>
62 #include <linux/rtc.h>
63
64 /* For the benefit of older linux systems which don't supply it,
65 we use a local copy of hpet.h. */
66 /* #include <linux/hpet.h> */
67 #include "hpet.h"
68
69 #include <linux/ppdev.h>
70 #include <linux/parport.h>
71 #endif
72 #ifdef __sun__
73 #include <sys/stat.h>
74 #include <sys/ethernet.h>
75 #include <sys/sockio.h>
76 #include <netinet/arp.h>
77 #include <netinet/in.h>
78 #include <netinet/in_systm.h>
79 #include <netinet/ip.h>
80 #include <netinet/ip_icmp.h> // must come after ip.h
81 #include <netinet/udp.h>
82 #include <netinet/tcp.h>
83 #include <net/if.h>
84 #include <syslog.h>
85 #include <stropts.h>
86 #endif
87 #endif
88 #endif
89
90 #if defined(__OpenBSD__)
91 #include <util.h>
92 #endif
93
94 #if defined(CONFIG_VDE)
95 #include <libvdeplug.h>
96 #endif
97
98 #include "qemu-common.h"
99 #include "net.h"
100 #include "net/tap.h"
101 #include "monitor.h"
102 #include "sysemu.h"
103 #include "qemu-timer.h"
104 #include "qemu-char.h"
105 #include "audio/audio.h"
106 #include "qemu_socket.h"
107 #include "qemu-log.h"
108 #include "qemu-config.h"
109
110 #include "slirp/libslirp.h"
111
112 static QTAILQ_HEAD(, VLANState) vlans;
113 static QTAILQ_HEAD(, VLANClientState) non_vlan_clients;
114
115 /***********************************************************/
116 /* network device redirectors */
117
118 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
119 static void hex_dump(FILE *f, const uint8_t *buf, int size)
120 {
121 int len, i, j, c;
122
123 for(i=0;i<size;i+=16) {
124 len = size - i;
125 if (len > 16)
126 len = 16;
127 fprintf(f, "%08x ", i);
128 for(j=0;j<16;j++) {
129 if (j < len)
130 fprintf(f, " %02x", buf[i+j]);
131 else
132 fprintf(f, " ");
133 }
134 fprintf(f, " ");
135 for(j=0;j<len;j++) {
136 c = buf[i+j];
137 if (c < ' ' || c > '~')
138 c = '.';
139 fprintf(f, "%c", c);
140 }
141 fprintf(f, "\n");
142 }
143 }
144 #endif
145
146 static int parse_macaddr(uint8_t *macaddr, const char *p)
147 {
148 int i;
149 char *last_char;
150 long int offset;
151
152 errno = 0;
153 offset = strtol(p, &last_char, 0);
154 if (0 == errno && '\0' == *last_char &&
155 offset >= 0 && offset <= 0xFFFFFF) {
156 macaddr[3] = (offset & 0xFF0000) >> 16;
157 macaddr[4] = (offset & 0xFF00) >> 8;
158 macaddr[5] = offset & 0xFF;
159 return 0;
160 } else {
161 for(i = 0; i < 6; i++) {
162 macaddr[i] = strtol(p, (char **)&p, 16);
163 if (i == 5) {
164 if (*p != '\0')
165 return -1;
166 } else {
167 if (*p != ':' && *p != '-')
168 return -1;
169 p++;
170 }
171 }
172 return 0;
173 }
174
175 return -1;
176 }
177
178 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
179 {
180 const char *p, *p1;
181 int len;
182 p = *pp;
183 p1 = strchr(p, sep);
184 if (!p1)
185 return -1;
186 len = p1 - p;
187 p1++;
188 if (buf_size > 0) {
189 if (len > buf_size - 1)
190 len = buf_size - 1;
191 memcpy(buf, p, len);
192 buf[len] = '\0';
193 }
194 *pp = p1;
195 return 0;
196 }
197
198 int parse_host_src_port(struct sockaddr_in *haddr,
199 struct sockaddr_in *saddr,
200 const char *input_str)
201 {
202 char *str = strdup(input_str);
203 char *host_str = str;
204 char *src_str;
205 const char *src_str2;
206 char *ptr;
207
208 /*
209 * Chop off any extra arguments at the end of the string which
210 * would start with a comma, then fill in the src port information
211 * if it was provided else use the "any address" and "any port".
212 */
213 if ((ptr = strchr(str,',')))
214 *ptr = '\0';
215
216 if ((src_str = strchr(input_str,'@'))) {
217 *src_str = '\0';
218 src_str++;
219 }
220
221 if (parse_host_port(haddr, host_str) < 0)
222 goto fail;
223
224 src_str2 = src_str;
225 if (!src_str || *src_str == '\0')
226 src_str2 = ":0";
227
228 if (parse_host_port(saddr, src_str2) < 0)
229 goto fail;
230
231 free(str);
232 return(0);
233
234 fail:
235 free(str);
236 return -1;
237 }
238
239 int parse_host_port(struct sockaddr_in *saddr, const char *str)
240 {
241 char buf[512];
242 struct hostent *he;
243 const char *p, *r;
244 int port;
245
246 p = str;
247 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
248 return -1;
249 saddr->sin_family = AF_INET;
250 if (buf[0] == '\0') {
251 saddr->sin_addr.s_addr = 0;
252 } else {
253 if (qemu_isdigit(buf[0])) {
254 if (!inet_aton(buf, &saddr->sin_addr))
255 return -1;
256 } else {
257 if ((he = gethostbyname(buf)) == NULL)
258 return - 1;
259 saddr->sin_addr = *(struct in_addr *)he->h_addr;
260 }
261 }
262 port = strtol(p, (char **)&r, 0);
263 if (r == p)
264 return -1;
265 saddr->sin_port = htons(port);
266 return 0;
267 }
268
269 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
270 {
271 snprintf(vc->info_str, sizeof(vc->info_str),
272 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
273 vc->model,
274 macaddr[0], macaddr[1], macaddr[2],
275 macaddr[3], macaddr[4], macaddr[5]);
276 }
277
278 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
279 {
280 static int index = 0;
281 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
282
283 if (memcmp(macaddr, &zero, sizeof(zero)) != 0)
284 return;
285 macaddr->a[0] = 0x52;
286 macaddr->a[1] = 0x54;
287 macaddr->a[2] = 0x00;
288 macaddr->a[3] = 0x12;
289 macaddr->a[4] = 0x34;
290 macaddr->a[5] = 0x56 + index++;
291 }
292
293 static char *assign_name(VLANClientState *vc1, const char *model)
294 {
295 VLANState *vlan;
296 char buf[256];
297 int id = 0;
298
299 QTAILQ_FOREACH(vlan, &vlans, next) {
300 VLANClientState *vc;
301
302 QTAILQ_FOREACH(vc, &vlan->clients, next) {
303 if (vc != vc1 && strcmp(vc->model, model) == 0) {
304 id++;
305 }
306 }
307 }
308
309 snprintf(buf, sizeof(buf), "%s.%d", model, id);
310
311 return qemu_strdup(buf);
312 }
313
314 static ssize_t qemu_deliver_packet(VLANClientState *sender,
315 unsigned flags,
316 const uint8_t *data,
317 size_t size,
318 void *opaque);
319 static ssize_t qemu_deliver_packet_iov(VLANClientState *sender,
320 unsigned flags,
321 const struct iovec *iov,
322 int iovcnt,
323 void *opaque);
324
325 VLANClientState *qemu_new_vlan_client(net_client_type type,
326 VLANState *vlan,
327 VLANClientState *peer,
328 const char *model,
329 const char *name,
330 NetCanReceive *can_receive,
331 NetReceive *receive,
332 NetReceive *receive_raw,
333 NetReceiveIOV *receive_iov,
334 NetCleanup *cleanup,
335 void *opaque)
336 {
337 VLANClientState *vc;
338
339 vc = qemu_mallocz(sizeof(VLANClientState));
340
341 vc->type = type;
342 vc->model = qemu_strdup(model);
343 if (name)
344 vc->name = qemu_strdup(name);
345 else
346 vc->name = assign_name(vc, model);
347 vc->can_receive = can_receive;
348 vc->receive = receive;
349 vc->receive_raw = receive_raw;
350 vc->receive_iov = receive_iov;
351 vc->cleanup = cleanup;
352 vc->opaque = opaque;
353
354 if (vlan) {
355 assert(!peer);
356 vc->vlan = vlan;
357 QTAILQ_INSERT_TAIL(&vc->vlan->clients, vc, next);
358 } else {
359 if (peer) {
360 vc->peer = peer;
361 peer->peer = vc;
362 }
363 QTAILQ_INSERT_TAIL(&non_vlan_clients, vc, next);
364
365 vc->send_queue = qemu_new_net_queue(qemu_deliver_packet,
366 qemu_deliver_packet_iov,
367 vc);
368 }
369
370 return vc;
371 }
372
373 void qemu_del_vlan_client(VLANClientState *vc)
374 {
375 if (vc->vlan) {
376 QTAILQ_REMOVE(&vc->vlan->clients, vc, next);
377 } else {
378 if (vc->send_queue) {
379 qemu_del_net_queue(vc->send_queue);
380 }
381 QTAILQ_REMOVE(&non_vlan_clients, vc, next);
382 if (vc->peer) {
383 vc->peer->peer = NULL;
384 }
385 }
386
387 if (vc->cleanup) {
388 vc->cleanup(vc);
389 }
390
391 qemu_free(vc->name);
392 qemu_free(vc->model);
393 qemu_free(vc);
394 }
395
396 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
397 {
398 VLANClientState *vc;
399
400 QTAILQ_FOREACH(vc, &vlan->clients, next) {
401 if (vc->opaque == opaque) {
402 return vc;
403 }
404 }
405
406 return NULL;
407 }
408
409 static VLANClientState *
410 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
411 const char *client_str)
412 {
413 VLANState *vlan;
414 VLANClientState *vc;
415
416 vlan = qemu_find_vlan(vlan_id, 0);
417 if (!vlan) {
418 monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
419 return NULL;
420 }
421
422 QTAILQ_FOREACH(vc, &vlan->clients, next) {
423 if (!strcmp(vc->name, client_str)) {
424 break;
425 }
426 }
427 if (!vc) {
428 monitor_printf(mon, "can't find device %s on VLAN %d\n",
429 client_str, vlan_id);
430 }
431
432 return vc;
433 }
434
435 int qemu_can_send_packet(VLANClientState *sender)
436 {
437 VLANState *vlan = sender->vlan;
438 VLANClientState *vc;
439
440 if (sender->peer) {
441 if (sender->peer->receive_disabled) {
442 return 0;
443 } else if (sender->peer->can_receive &&
444 !sender->peer->can_receive(sender->peer)) {
445 return 0;
446 } else {
447 return 1;
448 }
449 }
450
451 if (!sender->vlan) {
452 return 1;
453 }
454
455 QTAILQ_FOREACH(vc, &vlan->clients, next) {
456 if (vc == sender) {
457 continue;
458 }
459
460 /* no can_receive() handler, they can always receive */
461 if (!vc->can_receive || vc->can_receive(vc)) {
462 return 1;
463 }
464 }
465 return 0;
466 }
467
468 static ssize_t qemu_deliver_packet(VLANClientState *sender,
469 unsigned flags,
470 const uint8_t *data,
471 size_t size,
472 void *opaque)
473 {
474 VLANClientState *vc = opaque;
475 ssize_t ret;
476
477 if (vc->link_down) {
478 return size;
479 }
480
481 if (vc->receive_disabled) {
482 return 0;
483 }
484
485 if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->receive_raw) {
486 ret = vc->receive_raw(vc, data, size);
487 } else {
488 ret = vc->receive(vc, data, size);
489 }
490
491 if (ret == 0) {
492 vc->receive_disabled = 1;
493 };
494
495 return ret;
496 }
497
498 static ssize_t qemu_vlan_deliver_packet(VLANClientState *sender,
499 unsigned flags,
500 const uint8_t *buf,
501 size_t size,
502 void *opaque)
503 {
504 VLANState *vlan = opaque;
505 VLANClientState *vc;
506 ssize_t ret = -1;
507
508 QTAILQ_FOREACH(vc, &vlan->clients, next) {
509 ssize_t len;
510
511 if (vc == sender) {
512 continue;
513 }
514
515 if (vc->link_down) {
516 ret = size;
517 continue;
518 }
519
520 if (vc->receive_disabled) {
521 ret = 0;
522 continue;
523 }
524
525 if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->receive_raw) {
526 len = vc->receive_raw(vc, buf, size);
527 } else {
528 len = vc->receive(vc, buf, size);
529 }
530
531 if (len == 0) {
532 vc->receive_disabled = 1;
533 }
534
535 ret = (ret >= 0) ? ret : len;
536
537 }
538
539 return ret;
540 }
541
542 void qemu_purge_queued_packets(VLANClientState *vc)
543 {
544 NetQueue *queue;
545
546 if (!vc->peer && !vc->vlan) {
547 return;
548 }
549
550 if (vc->peer) {
551 queue = vc->peer->send_queue;
552 } else {
553 queue = vc->vlan->send_queue;
554 }
555
556 qemu_net_queue_purge(queue, vc);
557 }
558
559 void qemu_flush_queued_packets(VLANClientState *vc)
560 {
561 NetQueue *queue;
562
563 vc->receive_disabled = 0;
564
565 if (vc->vlan) {
566 queue = vc->vlan->send_queue;
567 } else {
568 queue = vc->send_queue;
569 }
570
571 qemu_net_queue_flush(queue);
572 }
573
574 static ssize_t qemu_send_packet_async_with_flags(VLANClientState *sender,
575 unsigned flags,
576 const uint8_t *buf, int size,
577 NetPacketSent *sent_cb)
578 {
579 NetQueue *queue;
580
581 #ifdef DEBUG_NET
582 printf("qemu_send_packet_async:\n");
583 hex_dump(stdout, buf, size);
584 #endif
585
586 if (sender->link_down || (!sender->peer && !sender->vlan)) {
587 return size;
588 }
589
590 if (sender->peer) {
591 queue = sender->peer->send_queue;
592 } else {
593 queue = sender->vlan->send_queue;
594 }
595
596 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
597 }
598
599 ssize_t qemu_send_packet_async(VLANClientState *sender,
600 const uint8_t *buf, int size,
601 NetPacketSent *sent_cb)
602 {
603 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
604 buf, size, sent_cb);
605 }
606
607 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
608 {
609 qemu_send_packet_async(vc, buf, size, NULL);
610 }
611
612 ssize_t qemu_send_packet_raw(VLANClientState *vc, const uint8_t *buf, int size)
613 {
614 return qemu_send_packet_async_with_flags(vc, QEMU_NET_PACKET_FLAG_RAW,
615 buf, size, NULL);
616 }
617
618 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
619 int iovcnt)
620 {
621 uint8_t buffer[4096];
622 size_t offset = 0;
623 int i;
624
625 for (i = 0; i < iovcnt; i++) {
626 size_t len;
627
628 len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
629 memcpy(buffer + offset, iov[i].iov_base, len);
630 offset += len;
631 }
632
633 return vc->receive(vc, buffer, offset);
634 }
635
636 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
637 {
638 size_t offset = 0;
639 int i;
640
641 for (i = 0; i < iovcnt; i++)
642 offset += iov[i].iov_len;
643 return offset;
644 }
645
646 static ssize_t qemu_deliver_packet_iov(VLANClientState *sender,
647 unsigned flags,
648 const struct iovec *iov,
649 int iovcnt,
650 void *opaque)
651 {
652 VLANClientState *vc = opaque;
653
654 if (vc->link_down) {
655 return calc_iov_length(iov, iovcnt);
656 }
657
658 if (vc->receive_iov) {
659 return vc->receive_iov(vc, iov, iovcnt);
660 } else {
661 return vc_sendv_compat(vc, iov, iovcnt);
662 }
663 }
664
665 static ssize_t qemu_vlan_deliver_packet_iov(VLANClientState *sender,
666 unsigned flags,
667 const struct iovec *iov,
668 int iovcnt,
669 void *opaque)
670 {
671 VLANState *vlan = opaque;
672 VLANClientState *vc;
673 ssize_t ret = -1;
674
675 QTAILQ_FOREACH(vc, &vlan->clients, next) {
676 ssize_t len;
677
678 if (vc == sender) {
679 continue;
680 }
681
682 if (vc->link_down) {
683 ret = calc_iov_length(iov, iovcnt);
684 continue;
685 }
686
687 assert(!(flags & QEMU_NET_PACKET_FLAG_RAW));
688
689 if (vc->receive_iov) {
690 len = vc->receive_iov(vc, iov, iovcnt);
691 } else {
692 len = vc_sendv_compat(vc, iov, iovcnt);
693 }
694
695 ret = (ret >= 0) ? ret : len;
696 }
697
698 return ret;
699 }
700
701 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
702 const struct iovec *iov, int iovcnt,
703 NetPacketSent *sent_cb)
704 {
705 NetQueue *queue;
706
707 if (sender->link_down || (!sender->peer && !sender->vlan)) {
708 return calc_iov_length(iov, iovcnt);
709 }
710
711 if (sender->peer) {
712 queue = sender->peer->send_queue;
713 } else {
714 queue = sender->vlan->send_queue;
715 }
716
717 return qemu_net_queue_send_iov(queue, sender,
718 QEMU_NET_PACKET_FLAG_NONE,
719 iov, iovcnt, sent_cb);
720 }
721
722 ssize_t
723 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
724 {
725 return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
726 }
727
728 #if defined(CONFIG_SLIRP)
729
730 /* slirp network adapter */
731
732 #define SLIRP_CFG_HOSTFWD 1
733 #define SLIRP_CFG_LEGACY 2
734
735 struct slirp_config_str {
736 struct slirp_config_str *next;
737 int flags;
738 char str[1024];
739 int legacy_format;
740 };
741
742 typedef struct SlirpState {
743 QTAILQ_ENTRY(SlirpState) entry;
744 VLANClientState *vc;
745 Slirp *slirp;
746 #ifndef _WIN32
747 char smb_dir[128];
748 #endif
749 } SlirpState;
750
751 static struct slirp_config_str *slirp_configs;
752 const char *legacy_tftp_prefix;
753 const char *legacy_bootp_filename;
754 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
755 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
756
757 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
758 int legacy_format);
759 static int slirp_guestfwd(SlirpState *s, const char *config_str,
760 int legacy_format);
761
762 #ifndef _WIN32
763 static const char *legacy_smb_export;
764
765 static int slirp_smb(SlirpState *s, const char *exported_dir,
766 struct in_addr vserver_addr);
767 static void slirp_smb_cleanup(SlirpState *s);
768 #else
769 static inline void slirp_smb_cleanup(SlirpState *s) { }
770 #endif
771
772 int slirp_can_output(void *opaque)
773 {
774 SlirpState *s = opaque;
775
776 return qemu_can_send_packet(s->vc);
777 }
778
779 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
780 {
781 SlirpState *s = opaque;
782
783 #ifdef DEBUG_SLIRP
784 printf("slirp output:\n");
785 hex_dump(stdout, pkt, pkt_len);
786 #endif
787 qemu_send_packet(s->vc, pkt, pkt_len);
788 }
789
790 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
791 {
792 SlirpState *s = vc->opaque;
793
794 #ifdef DEBUG_SLIRP
795 printf("slirp input:\n");
796 hex_dump(stdout, buf, size);
797 #endif
798 slirp_input(s->slirp, buf, size);
799 return size;
800 }
801
802 static void net_slirp_cleanup(VLANClientState *vc)
803 {
804 SlirpState *s = vc->opaque;
805
806 slirp_cleanup(s->slirp);
807 slirp_smb_cleanup(s);
808 QTAILQ_REMOVE(&slirp_stacks, s, entry);
809 qemu_free(s);
810 }
811
812 static int net_slirp_init(VLANState *vlan, const char *model,
813 const char *name, int restricted,
814 const char *vnetwork, const char *vhost,
815 const char *vhostname, const char *tftp_export,
816 const char *bootfile, const char *vdhcp_start,
817 const char *vnameserver, const char *smb_export,
818 const char *vsmbserver)
819 {
820 /* default settings according to historic slirp */
821 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
822 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
823 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
824 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
825 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
826 #ifndef _WIN32
827 struct in_addr smbsrv = { .s_addr = 0 };
828 #endif
829 SlirpState *s;
830 char buf[20];
831 uint32_t addr;
832 int shift;
833 char *end;
834 struct slirp_config_str *config;
835
836 if (!tftp_export) {
837 tftp_export = legacy_tftp_prefix;
838 }
839 if (!bootfile) {
840 bootfile = legacy_bootp_filename;
841 }
842
843 if (vnetwork) {
844 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
845 if (!inet_aton(vnetwork, &net)) {
846 return -1;
847 }
848 addr = ntohl(net.s_addr);
849 if (!(addr & 0x80000000)) {
850 mask.s_addr = htonl(0xff000000); /* class A */
851 } else if ((addr & 0xfff00000) == 0xac100000) {
852 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
853 } else if ((addr & 0xc0000000) == 0x80000000) {
854 mask.s_addr = htonl(0xffff0000); /* class B */
855 } else if ((addr & 0xffff0000) == 0xc0a80000) {
856 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
857 } else if ((addr & 0xffff0000) == 0xc6120000) {
858 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
859 } else if ((addr & 0xe0000000) == 0xe0000000) {
860 mask.s_addr = htonl(0xffffff00); /* class C */
861 } else {
862 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
863 }
864 } else {
865 if (!inet_aton(buf, &net)) {
866 return -1;
867 }
868 shift = strtol(vnetwork, &end, 10);
869 if (*end != '\0') {
870 if (!inet_aton(vnetwork, &mask)) {
871 return -1;
872 }
873 } else if (shift < 4 || shift > 32) {
874 return -1;
875 } else {
876 mask.s_addr = htonl(0xffffffff << (32 - shift));
877 }
878 }
879 net.s_addr &= mask.s_addr;
880 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
881 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
882 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
883 }
884
885 if (vhost && !inet_aton(vhost, &host)) {
886 return -1;
887 }
888 if ((host.s_addr & mask.s_addr) != net.s_addr) {
889 return -1;
890 }
891
892 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
893 return -1;
894 }
895 if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
896 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
897 return -1;
898 }
899
900 if (vnameserver && !inet_aton(vnameserver, &dns)) {
901 return -1;
902 }
903 if ((dns.s_addr & mask.s_addr) != net.s_addr ||
904 dns.s_addr == host.s_addr) {
905 return -1;
906 }
907
908 #ifndef _WIN32
909 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
910 return -1;
911 }
912 #endif
913
914 s = qemu_mallocz(sizeof(SlirpState));
915 s->slirp = slirp_init(restricted, net, mask, host, vhostname,
916 tftp_export, bootfile, dhcp, dns, s);
917 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
918
919 for (config = slirp_configs; config; config = config->next) {
920 if (config->flags & SLIRP_CFG_HOSTFWD) {
921 if (slirp_hostfwd(s, config->str,
922 config->flags & SLIRP_CFG_LEGACY) < 0)
923 return -1;
924 } else {
925 if (slirp_guestfwd(s, config->str,
926 config->flags & SLIRP_CFG_LEGACY) < 0)
927 return -1;
928 }
929 }
930 #ifndef _WIN32
931 if (!smb_export) {
932 smb_export = legacy_smb_export;
933 }
934 if (smb_export) {
935 if (slirp_smb(s, smb_export, smbsrv) < 0)
936 return -1;
937 }
938 #endif
939
940 s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_SLIRP,
941 vlan, NULL, model, name, NULL,
942 slirp_receive, NULL, NULL,
943 net_slirp_cleanup, s);
944 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
945 "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
946 return 0;
947 }
948
949 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
950 const char *stack)
951 {
952 VLANClientState *vc;
953
954 if (vlan) {
955 vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
956 if (!vc) {
957 return NULL;
958 }
959 if (strcmp(vc->model, "user")) {
960 monitor_printf(mon, "invalid device specified\n");
961 return NULL;
962 }
963 return vc->opaque;
964 } else {
965 if (QTAILQ_EMPTY(&slirp_stacks)) {
966 monitor_printf(mon, "user mode network stack not in use\n");
967 return NULL;
968 }
969 return QTAILQ_FIRST(&slirp_stacks);
970 }
971 }
972
973 void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict)
974 {
975 struct in_addr host_addr = { .s_addr = INADDR_ANY };
976 int host_port;
977 char buf[256] = "";
978 const char *src_str, *p;
979 SlirpState *s;
980 int is_udp = 0;
981 int err;
982 const char *arg1 = qdict_get_str(qdict, "arg1");
983 const char *arg2 = qdict_get_try_str(qdict, "arg2");
984 const char *arg3 = qdict_get_try_str(qdict, "arg3");
985
986 if (arg2) {
987 s = slirp_lookup(mon, arg1, arg2);
988 src_str = arg3;
989 } else {
990 s = slirp_lookup(mon, NULL, NULL);
991 src_str = arg1;
992 }
993 if (!s) {
994 return;
995 }
996
997 if (!src_str || !src_str[0])
998 goto fail_syntax;
999
1000 p = src_str;
1001 get_str_sep(buf, sizeof(buf), &p, ':');
1002
1003 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
1004 is_udp = 0;
1005 } else if (!strcmp(buf, "udp")) {
1006 is_udp = 1;
1007 } else {
1008 goto fail_syntax;
1009 }
1010
1011 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1012 goto fail_syntax;
1013 }
1014 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
1015 goto fail_syntax;
1016 }
1017
1018 host_port = atoi(p);
1019
1020 err = slirp_remove_hostfwd(QTAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
1021 host_addr, host_port);
1022
1023 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
1024 err ? "removed" : "not found");
1025 return;
1026
1027 fail_syntax:
1028 monitor_printf(mon, "invalid format\n");
1029 }
1030
1031 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
1032 int legacy_format)
1033 {
1034 struct in_addr host_addr = { .s_addr = INADDR_ANY };
1035 struct in_addr guest_addr = { .s_addr = 0 };
1036 int host_port, guest_port;
1037 const char *p;
1038 char buf[256];
1039 int is_udp;
1040 char *end;
1041
1042 p = redir_str;
1043 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1044 goto fail_syntax;
1045 }
1046 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
1047 is_udp = 0;
1048 } else if (!strcmp(buf, "udp")) {
1049 is_udp = 1;
1050 } else {
1051 goto fail_syntax;
1052 }
1053
1054 if (!legacy_format) {
1055 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1056 goto fail_syntax;
1057 }
1058 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
1059 goto fail_syntax;
1060 }
1061 }
1062
1063 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
1064 goto fail_syntax;
1065 }
1066 host_port = strtol(buf, &end, 0);
1067 if (*end != '\0' || host_port < 1 || host_port > 65535) {
1068 goto fail_syntax;
1069 }
1070
1071 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1072 goto fail_syntax;
1073 }
1074 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1075 goto fail_syntax;
1076 }
1077
1078 guest_port = strtol(p, &end, 0);
1079 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1080 goto fail_syntax;
1081 }
1082
1083 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1084 guest_port) < 0) {
1085 qemu_error("could not set up host forwarding rule '%s'\n",
1086 redir_str);
1087 return -1;
1088 }
1089 return 0;
1090
1091 fail_syntax:
1092 qemu_error("invalid host forwarding rule '%s'\n", redir_str);
1093 return -1;
1094 }
1095
1096 void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict)
1097 {
1098 const char *redir_str;
1099 SlirpState *s;
1100 const char *arg1 = qdict_get_str(qdict, "arg1");
1101 const char *arg2 = qdict_get_try_str(qdict, "arg2");
1102 const char *arg3 = qdict_get_try_str(qdict, "arg3");
1103
1104 if (arg2) {
1105 s = slirp_lookup(mon, arg1, arg2);
1106 redir_str = arg3;
1107 } else {
1108 s = slirp_lookup(mon, NULL, NULL);
1109 redir_str = arg1;
1110 }
1111 if (s) {
1112 slirp_hostfwd(s, redir_str, 0);
1113 }
1114
1115 }
1116
1117 int net_slirp_redir(const char *redir_str)
1118 {
1119 struct slirp_config_str *config;
1120
1121 if (QTAILQ_EMPTY(&slirp_stacks)) {
1122 config = qemu_malloc(sizeof(*config));
1123 pstrcpy(config->str, sizeof(config->str), redir_str);
1124 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1125 config->next = slirp_configs;
1126 slirp_configs = config;
1127 return 0;
1128 }
1129
1130 return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1);
1131 }
1132
1133 #ifndef _WIN32
1134
1135 /* automatic user mode samba server configuration */
1136 static void slirp_smb_cleanup(SlirpState *s)
1137 {
1138 char cmd[128];
1139
1140 if (s->smb_dir[0] != '\0') {
1141 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1142 system(cmd);
1143 s->smb_dir[0] = '\0';
1144 }
1145 }
1146
1147 static int slirp_smb(SlirpState* s, const char *exported_dir,
1148 struct in_addr vserver_addr)
1149 {
1150 static int instance;
1151 char smb_conf[128];
1152 char smb_cmdline[128];
1153 FILE *f;
1154
1155 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1156 (long)getpid(), instance++);
1157 if (mkdir(s->smb_dir, 0700) < 0) {
1158 qemu_error("could not create samba server dir '%s'\n", s->smb_dir);
1159 return -1;
1160 }
1161 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1162
1163 f = fopen(smb_conf, "w");
1164 if (!f) {
1165 slirp_smb_cleanup(s);
1166 qemu_error("could not create samba server configuration file '%s'\n",
1167 smb_conf);
1168 return -1;
1169 }
1170 fprintf(f,
1171 "[global]\n"
1172 "private dir=%s\n"
1173 "smb ports=0\n"
1174 "socket address=127.0.0.1\n"
1175 "pid directory=%s\n"
1176 "lock directory=%s\n"
1177 "log file=%s/log.smbd\n"
1178 "smb passwd file=%s/smbpasswd\n"
1179 "security = share\n"
1180 "[qemu]\n"
1181 "path=%s\n"
1182 "read only=no\n"
1183 "guest ok=yes\n",
1184 s->smb_dir,
1185 s->smb_dir,
1186 s->smb_dir,
1187 s->smb_dir,
1188 s->smb_dir,
1189 exported_dir
1190 );
1191 fclose(f);
1192
1193 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1194 SMBD_COMMAND, smb_conf);
1195
1196 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) {
1197 slirp_smb_cleanup(s);
1198 qemu_error("conflicting/invalid smbserver address\n");
1199 return -1;
1200 }
1201 return 0;
1202 }
1203
1204 /* automatic user mode samba server configuration (legacy interface) */
1205 int net_slirp_smb(const char *exported_dir)
1206 {
1207 struct in_addr vserver_addr = { .s_addr = 0 };
1208
1209 if (legacy_smb_export) {
1210 fprintf(stderr, "-smb given twice\n");
1211 return -1;
1212 }
1213 legacy_smb_export = exported_dir;
1214 if (!QTAILQ_EMPTY(&slirp_stacks)) {
1215 return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
1216 vserver_addr);
1217 }
1218 return 0;
1219 }
1220
1221 #endif /* !defined(_WIN32) */
1222
1223 struct GuestFwd {
1224 CharDriverState *hd;
1225 struct in_addr server;
1226 int port;
1227 Slirp *slirp;
1228 };
1229
1230 static int guestfwd_can_read(void *opaque)
1231 {
1232 struct GuestFwd *fwd = opaque;
1233 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1234 }
1235
1236 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1237 {
1238 struct GuestFwd *fwd = opaque;
1239 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1240 }
1241
1242 static int slirp_guestfwd(SlirpState *s, const char *config_str,
1243 int legacy_format)
1244 {
1245 struct in_addr server = { .s_addr = 0 };
1246 struct GuestFwd *fwd;
1247 const char *p;
1248 char buf[128];
1249 char *end;
1250 int port;
1251
1252 p = config_str;
1253 if (legacy_format) {
1254 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1255 goto fail_syntax;
1256 }
1257 } else {
1258 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1259 goto fail_syntax;
1260 }
1261 if (strcmp(buf, "tcp") && buf[0] != '\0') {
1262 goto fail_syntax;
1263 }
1264 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1265 goto fail_syntax;
1266 }
1267 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1268 goto fail_syntax;
1269 }
1270 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1271 goto fail_syntax;
1272 }
1273 }
1274 port = strtol(buf, &end, 10);
1275 if (*end != '\0' || port < 1 || port > 65535) {
1276 goto fail_syntax;
1277 }
1278
1279 fwd = qemu_malloc(sizeof(struct GuestFwd));
1280 snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1281 fwd->hd = qemu_chr_open(buf, p, NULL);
1282 if (!fwd->hd) {
1283 qemu_error("could not open guest forwarding device '%s'\n", buf);
1284 qemu_free(fwd);
1285 return -1;
1286 }
1287
1288 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
1289 qemu_error("conflicting/invalid host:port in guest forwarding "
1290 "rule '%s'\n", config_str);
1291 qemu_free(fwd);
1292 return -1;
1293 }
1294 fwd->server = server;
1295 fwd->port = port;
1296 fwd->slirp = s->slirp;
1297
1298 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1299 NULL, fwd);
1300 return 0;
1301
1302 fail_syntax:
1303 qemu_error("invalid guest forwarding rule '%s'\n", config_str);
1304 return -1;
1305 }
1306
1307 void do_info_usernet(Monitor *mon)
1308 {
1309 SlirpState *s;
1310
1311 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
1312 monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1313 slirp_connection_info(s->slirp, mon);
1314 }
1315 }
1316
1317 #endif /* CONFIG_SLIRP */
1318
1319 #if defined(CONFIG_VDE)
1320 typedef struct VDEState {
1321 VLANClientState *vc;
1322 VDECONN *vde;
1323 } VDEState;
1324
1325 static void vde_to_qemu(void *opaque)
1326 {
1327 VDEState *s = opaque;
1328 uint8_t buf[4096];
1329 int size;
1330
1331 size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1332 if (size > 0) {
1333 qemu_send_packet(s->vc, buf, size);
1334 }
1335 }
1336
1337 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1338 {
1339 VDEState *s = vc->opaque;
1340 ssize_t ret;
1341
1342 do {
1343 ret = vde_send(s->vde, (const char *)buf, size, 0);
1344 } while (ret < 0 && errno == EINTR);
1345
1346 return ret;
1347 }
1348
1349 static void vde_cleanup(VLANClientState *vc)
1350 {
1351 VDEState *s = vc->opaque;
1352 qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1353 vde_close(s->vde);
1354 qemu_free(s);
1355 }
1356
1357 static int net_vde_init(VLANState *vlan, const char *model,
1358 const char *name, const char *sock,
1359 int port, const char *group, int mode)
1360 {
1361 VDEState *s;
1362 char *init_group = (char *)group;
1363 char *init_sock = (char *)sock;
1364
1365 struct vde_open_args args = {
1366 .port = port,
1367 .group = init_group,
1368 .mode = mode,
1369 };
1370
1371 s = qemu_mallocz(sizeof(VDEState));
1372 s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1373 if (!s->vde){
1374 free(s);
1375 return -1;
1376 }
1377 s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_VDE,
1378 vlan, NULL, model, name, NULL,
1379 vde_receive, NULL, NULL,
1380 vde_cleanup, s);
1381 qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1382 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1383 sock, vde_datafd(s->vde));
1384 return 0;
1385 }
1386 #endif
1387
1388 /* network connection */
1389 typedef struct NetSocketState {
1390 VLANClientState *vc;
1391 int fd;
1392 int state; /* 0 = getting length, 1 = getting data */
1393 unsigned int index;
1394 unsigned int packet_len;
1395 uint8_t buf[4096];
1396 struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1397 } NetSocketState;
1398
1399 typedef struct NetSocketListenState {
1400 VLANState *vlan;
1401 char *model;
1402 char *name;
1403 int fd;
1404 } NetSocketListenState;
1405
1406 /* XXX: we consider we can send the whole packet without blocking */
1407 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1408 {
1409 NetSocketState *s = vc->opaque;
1410 uint32_t len;
1411 len = htonl(size);
1412
1413 send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1414 return send_all(s->fd, buf, size);
1415 }
1416
1417 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1418 {
1419 NetSocketState *s = vc->opaque;
1420
1421 return sendto(s->fd, (const void *)buf, size, 0,
1422 (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1423 }
1424
1425 static void net_socket_send(void *opaque)
1426 {
1427 NetSocketState *s = opaque;
1428 int size, err;
1429 unsigned l;
1430 uint8_t buf1[4096];
1431 const uint8_t *buf;
1432
1433 size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1434 if (size < 0) {
1435 err = socket_error();
1436 if (err != EWOULDBLOCK)
1437 goto eoc;
1438 } else if (size == 0) {
1439 /* end of connection */
1440 eoc:
1441 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1442 closesocket(s->fd);
1443 return;
1444 }
1445 buf = buf1;
1446 while (size > 0) {
1447 /* reassemble a packet from the network */
1448 switch(s->state) {
1449 case 0:
1450 l = 4 - s->index;
1451 if (l > size)
1452 l = size;
1453 memcpy(s->buf + s->index, buf, l);
1454 buf += l;
1455 size -= l;
1456 s->index += l;
1457 if (s->index == 4) {
1458 /* got length */
1459 s->packet_len = ntohl(*(uint32_t *)s->buf);
1460 s->index = 0;
1461 s->state = 1;
1462 }
1463 break;
1464 case 1:
1465 l = s->packet_len - s->index;
1466 if (l > size)
1467 l = size;
1468 if (s->index + l <= sizeof(s->buf)) {
1469 memcpy(s->buf + s->index, buf, l);
1470 } else {
1471 fprintf(stderr, "serious error: oversized packet received,"
1472 "connection terminated.\n");
1473 s->state = 0;
1474 goto eoc;
1475 }
1476
1477 s->index += l;
1478 buf += l;
1479 size -= l;
1480 if (s->index >= s->packet_len) {
1481 qemu_send_packet(s->vc, s->buf, s->packet_len);
1482 s->index = 0;
1483 s->state = 0;
1484 }
1485 break;
1486 }
1487 }
1488 }
1489
1490 static void net_socket_send_dgram(void *opaque)
1491 {
1492 NetSocketState *s = opaque;
1493 int size;
1494
1495 size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1496 if (size < 0)
1497 return;
1498 if (size == 0) {
1499 /* end of connection */
1500 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1501 return;
1502 }
1503 qemu_send_packet(s->vc, s->buf, size);
1504 }
1505
1506 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1507 {
1508 struct ip_mreq imr;
1509 int fd;
1510 int val, ret;
1511 if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1512 fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1513 inet_ntoa(mcastaddr->sin_addr),
1514 (int)ntohl(mcastaddr->sin_addr.s_addr));
1515 return -1;
1516
1517 }
1518 fd = socket(PF_INET, SOCK_DGRAM, 0);
1519 if (fd < 0) {
1520 perror("socket(PF_INET, SOCK_DGRAM)");
1521 return -1;
1522 }
1523
1524 val = 1;
1525 ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1526 (const char *)&val, sizeof(val));
1527 if (ret < 0) {
1528 perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1529 goto fail;
1530 }
1531
1532 ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1533 if (ret < 0) {
1534 perror("bind");
1535 goto fail;
1536 }
1537
1538 /* Add host to multicast group */
1539 imr.imr_multiaddr = mcastaddr->sin_addr;
1540 imr.imr_interface.s_addr = htonl(INADDR_ANY);
1541
1542 ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1543 (const char *)&imr, sizeof(struct ip_mreq));
1544 if (ret < 0) {
1545 perror("setsockopt(IP_ADD_MEMBERSHIP)");
1546 goto fail;
1547 }
1548
1549 /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1550 val = 1;
1551 ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1552 (const char *)&val, sizeof(val));
1553 if (ret < 0) {
1554 perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1555 goto fail;
1556 }
1557
1558 socket_set_nonblock(fd);
1559 return fd;
1560 fail:
1561 if (fd >= 0)
1562 closesocket(fd);
1563 return -1;
1564 }
1565
1566 static void net_socket_cleanup(VLANClientState *vc)
1567 {
1568 NetSocketState *s = vc->opaque;
1569 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1570 close(s->fd);
1571 qemu_free(s);
1572 }
1573
1574 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1575 const char *model,
1576 const char *name,
1577 int fd, int is_connected)
1578 {
1579 struct sockaddr_in saddr;
1580 int newfd;
1581 socklen_t saddr_len;
1582 NetSocketState *s;
1583
1584 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1585 * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1586 * by ONLY ONE process: we must "clone" this dgram socket --jjo
1587 */
1588
1589 if (is_connected) {
1590 if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1591 /* must be bound */
1592 if (saddr.sin_addr.s_addr==0) {
1593 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1594 fd);
1595 return NULL;
1596 }
1597 /* clone dgram socket */
1598 newfd = net_socket_mcast_create(&saddr);
1599 if (newfd < 0) {
1600 /* error already reported by net_socket_mcast_create() */
1601 close(fd);
1602 return NULL;
1603 }
1604 /* clone newfd to fd, close newfd */
1605 dup2(newfd, fd);
1606 close(newfd);
1607
1608 } else {
1609 fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1610 fd, strerror(errno));
1611 return NULL;
1612 }
1613 }
1614
1615 s = qemu_mallocz(sizeof(NetSocketState));
1616 s->fd = fd;
1617
1618 s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_SOCKET,
1619 vlan, NULL, model, name, NULL,
1620 net_socket_receive_dgram, NULL, NULL,
1621 net_socket_cleanup, s);
1622 qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1623
1624 /* mcast: save bound address as dst */
1625 if (is_connected) s->dgram_dst=saddr;
1626
1627 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1628 "socket: fd=%d (%s mcast=%s:%d)",
1629 fd, is_connected? "cloned" : "",
1630 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1631 return s;
1632 }
1633
1634 static void net_socket_connect(void *opaque)
1635 {
1636 NetSocketState *s = opaque;
1637 qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1638 }
1639
1640 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1641 const char *model,
1642 const char *name,
1643 int fd, int is_connected)
1644 {
1645 NetSocketState *s;
1646 s = qemu_mallocz(sizeof(NetSocketState));
1647 s->fd = fd;
1648 s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_SOCKET,
1649 vlan, NULL, model, name, NULL,
1650 net_socket_receive, NULL, NULL,
1651 net_socket_cleanup, s);
1652 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1653 "socket: fd=%d", fd);
1654 if (is_connected) {
1655 net_socket_connect(s);
1656 } else {
1657 qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1658 }
1659 return s;
1660 }
1661
1662 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1663 const char *model, const char *name,
1664 int fd, int is_connected)
1665 {
1666 int so_type = -1, optlen=sizeof(so_type);
1667
1668 if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1669 (socklen_t *)&optlen)< 0) {
1670 fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1671 return NULL;
1672 }
1673 switch(so_type) {
1674 case SOCK_DGRAM:
1675 return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1676 case SOCK_STREAM:
1677 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1678 default:
1679 /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1680 fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1681 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1682 }
1683 return NULL;
1684 }
1685
1686 static void net_socket_accept(void *opaque)
1687 {
1688 NetSocketListenState *s = opaque;
1689 NetSocketState *s1;
1690 struct sockaddr_in saddr;
1691 socklen_t len;
1692 int fd;
1693
1694 for(;;) {
1695 len = sizeof(saddr);
1696 fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1697 if (fd < 0 && errno != EINTR) {
1698 return;
1699 } else if (fd >= 0) {
1700 break;
1701 }
1702 }
1703 s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1704 if (!s1) {
1705 closesocket(fd);
1706 } else {
1707 snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1708 "socket: connection from %s:%d",
1709 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1710 }
1711 }
1712
1713 static int net_socket_listen_init(VLANState *vlan,
1714 const char *model,
1715 const char *name,
1716 const char *host_str)
1717 {
1718 NetSocketListenState *s;
1719 int fd, val, ret;
1720 struct sockaddr_in saddr;
1721
1722 if (parse_host_port(&saddr, host_str) < 0)
1723 return -1;
1724
1725 s = qemu_mallocz(sizeof(NetSocketListenState));
1726
1727 fd = socket(PF_INET, SOCK_STREAM, 0);
1728 if (fd < 0) {
1729 perror("socket");
1730 return -1;
1731 }
1732 socket_set_nonblock(fd);
1733
1734 /* allow fast reuse */
1735 val = 1;
1736 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1737
1738 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1739 if (ret < 0) {
1740 perror("bind");
1741 return -1;
1742 }
1743 ret = listen(fd, 0);
1744 if (ret < 0) {
1745 perror("listen");
1746 return -1;
1747 }
1748 s->vlan = vlan;
1749 s->model = qemu_strdup(model);
1750 s->name = name ? qemu_strdup(name) : NULL;
1751 s->fd = fd;
1752 qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1753 return 0;
1754 }
1755
1756 static int net_socket_connect_init(VLANState *vlan,
1757 const char *model,
1758 const char *name,
1759 const char *host_str)
1760 {
1761 NetSocketState *s;
1762 int fd, connected, ret, err;
1763 struct sockaddr_in saddr;
1764
1765 if (parse_host_port(&saddr, host_str) < 0)
1766 return -1;
1767
1768 fd = socket(PF_INET, SOCK_STREAM, 0);
1769 if (fd < 0) {
1770 perror("socket");
1771 return -1;
1772 }
1773 socket_set_nonblock(fd);
1774
1775 connected = 0;
1776 for(;;) {
1777 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1778 if (ret < 0) {
1779 err = socket_error();
1780 if (err == EINTR || err == EWOULDBLOCK) {
1781 } else if (err == EINPROGRESS) {
1782 break;
1783 #ifdef _WIN32
1784 } else if (err == WSAEALREADY) {
1785 break;
1786 #endif
1787 } else {
1788 perror("connect");
1789 closesocket(fd);
1790 return -1;
1791 }
1792 } else {
1793 connected = 1;
1794 break;
1795 }
1796 }
1797 s = net_socket_fd_init(vlan, model, name, fd, connected);
1798 if (!s)
1799 return -1;
1800 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1801 "socket: connect to %s:%d",
1802 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1803 return 0;
1804 }
1805
1806 static int net_socket_mcast_init(VLANState *vlan,
1807 const char *model,
1808 const char *name,
1809 const char *host_str)
1810 {
1811 NetSocketState *s;
1812 int fd;
1813 struct sockaddr_in saddr;
1814
1815 if (parse_host_port(&saddr, host_str) < 0)
1816 return -1;
1817
1818
1819 fd = net_socket_mcast_create(&saddr);
1820 if (fd < 0)
1821 return -1;
1822
1823 s = net_socket_fd_init(vlan, model, name, fd, 0);
1824 if (!s)
1825 return -1;
1826
1827 s->dgram_dst = saddr;
1828
1829 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1830 "socket: mcast=%s:%d",
1831 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1832 return 0;
1833
1834 }
1835
1836 typedef struct DumpState {
1837 VLANClientState *pcap_vc;
1838 int fd;
1839 int pcap_caplen;
1840 } DumpState;
1841
1842 #define PCAP_MAGIC 0xa1b2c3d4
1843
1844 struct pcap_file_hdr {
1845 uint32_t magic;
1846 uint16_t version_major;
1847 uint16_t version_minor;
1848 int32_t thiszone;
1849 uint32_t sigfigs;
1850 uint32_t snaplen;
1851 uint32_t linktype;
1852 };
1853
1854 struct pcap_sf_pkthdr {
1855 struct {
1856 int32_t tv_sec;
1857 int32_t tv_usec;
1858 } ts;
1859 uint32_t caplen;
1860 uint32_t len;
1861 };
1862
1863 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1864 {
1865 DumpState *s = vc->opaque;
1866 struct pcap_sf_pkthdr hdr;
1867 int64_t ts;
1868 int caplen;
1869
1870 /* Early return in case of previous error. */
1871 if (s->fd < 0) {
1872 return size;
1873 }
1874
1875 ts = muldiv64(qemu_get_clock(vm_clock), 1000000, get_ticks_per_sec());
1876 caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
1877
1878 hdr.ts.tv_sec = ts / 1000000;
1879 hdr.ts.tv_usec = ts % 1000000;
1880 hdr.caplen = caplen;
1881 hdr.len = size;
1882 if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
1883 write(s->fd, buf, caplen) != caplen) {
1884 qemu_log("-net dump write error - stop dump\n");
1885 close(s->fd);
1886 s->fd = -1;
1887 }
1888
1889 return size;
1890 }
1891
1892 static void net_dump_cleanup(VLANClientState *vc)
1893 {
1894 DumpState *s = vc->opaque;
1895
1896 close(s->fd);
1897 qemu_free(s);
1898 }
1899
1900 static int net_dump_init(VLANState *vlan, const char *device,
1901 const char *name, const char *filename, int len)
1902 {
1903 struct pcap_file_hdr hdr;
1904 DumpState *s;
1905
1906 s = qemu_malloc(sizeof(DumpState));
1907
1908 s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
1909 if (s->fd < 0) {
1910 qemu_error("-net dump: can't open %s\n", filename);
1911 return -1;
1912 }
1913
1914 s->pcap_caplen = len;
1915
1916 hdr.magic = PCAP_MAGIC;
1917 hdr.version_major = 2;
1918 hdr.version_minor = 4;
1919 hdr.thiszone = 0;
1920 hdr.sigfigs = 0;
1921 hdr.snaplen = s->pcap_caplen;
1922 hdr.linktype = 1;
1923
1924 if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
1925 qemu_error("-net dump write error: %s\n", strerror(errno));
1926 close(s->fd);
1927 qemu_free(s);
1928 return -1;
1929 }
1930
1931 s->pcap_vc = qemu_new_vlan_client(NET_CLIENT_TYPE_DUMP,
1932 vlan, NULL, device, name, NULL,
1933 dump_receive, NULL, NULL,
1934 net_dump_cleanup, s);
1935 snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
1936 "dump to %s (len=%d)", filename, len);
1937 return 0;
1938 }
1939
1940 /* find or alloc a new VLAN */
1941 VLANState *qemu_find_vlan(int id, int allocate)
1942 {
1943 VLANState *vlan;
1944
1945 QTAILQ_FOREACH(vlan, &vlans, next) {
1946 if (vlan->id == id) {
1947 return vlan;
1948 }
1949 }
1950
1951 if (!allocate) {
1952 return NULL;
1953 }
1954
1955 vlan = qemu_mallocz(sizeof(VLANState));
1956 vlan->id = id;
1957 QTAILQ_INIT(&vlan->clients);
1958
1959 vlan->send_queue = qemu_new_net_queue(qemu_vlan_deliver_packet,
1960 qemu_vlan_deliver_packet_iov,
1961 vlan);
1962
1963 QTAILQ_INSERT_TAIL(&vlans, vlan, next);
1964
1965 return vlan;
1966 }
1967
1968 VLANClientState *qemu_find_netdev(const char *id)
1969 {
1970 VLANClientState *vc;
1971
1972 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
1973 if (!strcmp(vc->name, id)) {
1974 return vc;
1975 }
1976 }
1977
1978 return NULL;
1979 }
1980
1981 static int nic_get_free_idx(void)
1982 {
1983 int index;
1984
1985 for (index = 0; index < MAX_NICS; index++)
1986 if (!nd_table[index].used)
1987 return index;
1988 return -1;
1989 }
1990
1991 int qemu_show_nic_models(const char *arg, const char *const *models)
1992 {
1993 int i;
1994
1995 if (!arg || strcmp(arg, "?"))
1996 return 0;
1997
1998 fprintf(stderr, "qemu: Supported NIC models: ");
1999 for (i = 0 ; models[i]; i++)
2000 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2001 return 1;
2002 }
2003
2004 void qemu_check_nic_model(NICInfo *nd, const char *model)
2005 {
2006 const char *models[2];
2007
2008 models[0] = model;
2009 models[1] = NULL;
2010
2011 if (qemu_show_nic_models(nd->model, models))
2012 exit(0);
2013 if (qemu_find_nic_model(nd, models, model) < 0)
2014 exit(1);
2015 }
2016
2017 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
2018 const char *default_model)
2019 {
2020 int i;
2021
2022 if (!nd->model)
2023 nd->model = qemu_strdup(default_model);
2024
2025 for (i = 0 ; models[i]; i++) {
2026 if (strcmp(nd->model, models[i]) == 0)
2027 return i;
2028 }
2029
2030 qemu_error("qemu: Unsupported NIC model: %s\n", nd->model);
2031 return -1;
2032 }
2033
2034 int net_handle_fd_param(Monitor *mon, const char *param)
2035 {
2036 if (!qemu_isdigit(param[0])) {
2037 int fd;
2038
2039 fd = monitor_get_fd(mon, param);
2040 if (fd == -1) {
2041 qemu_error("No file descriptor named %s found", param);
2042 return -1;
2043 }
2044
2045 return fd;
2046 } else {
2047 return strtol(param, NULL, 0);
2048 }
2049 }
2050
2051 static int net_init_nic(QemuOpts *opts,
2052 Monitor *mon,
2053 const char *name,
2054 VLANState *vlan)
2055 {
2056 int idx;
2057 NICInfo *nd;
2058 const char *netdev;
2059
2060 idx = nic_get_free_idx();
2061 if (idx == -1 || nb_nics >= MAX_NICS) {
2062 qemu_error("Too Many NICs\n");
2063 return -1;
2064 }
2065
2066 nd = &nd_table[idx];
2067
2068 memset(nd, 0, sizeof(*nd));
2069
2070 if ((netdev = qemu_opt_get(opts, "netdev"))) {
2071 nd->netdev = qemu_find_netdev(netdev);
2072 if (!nd->netdev) {
2073 qemu_error("netdev '%s' not found\n", netdev);
2074 return -1;
2075 }
2076 } else {
2077 assert(vlan);
2078 nd->vlan = vlan;
2079 }
2080 if (name) {
2081 nd->name = qemu_strdup(name);
2082 }
2083 if (qemu_opt_get(opts, "model")) {
2084 nd->model = qemu_strdup(qemu_opt_get(opts, "model"));
2085 }
2086 if (qemu_opt_get(opts, "addr")) {
2087 nd->devaddr = qemu_strdup(qemu_opt_get(opts, "addr"));
2088 }
2089
2090 nd->macaddr[0] = 0x52;
2091 nd->macaddr[1] = 0x54;
2092 nd->macaddr[2] = 0x00;
2093 nd->macaddr[3] = 0x12;
2094 nd->macaddr[4] = 0x34;
2095 nd->macaddr[5] = 0x56 + idx;
2096
2097 if (qemu_opt_get(opts, "macaddr") &&
2098 parse_macaddr(nd->macaddr, qemu_opt_get(opts, "macaddr")) < 0) {
2099 qemu_error("invalid syntax for ethernet address\n");
2100 return -1;
2101 }
2102
2103 nd->nvectors = qemu_opt_get_number(opts, "vectors", NIC_NVECTORS_UNSPECIFIED);
2104 if (nd->nvectors != NIC_NVECTORS_UNSPECIFIED &&
2105 (nd->nvectors < 0 || nd->nvectors > 0x7ffffff)) {
2106 qemu_error("invalid # of vectors: %d\n", nd->nvectors);
2107 return -1;
2108 }
2109
2110 nd->used = 1;
2111 if (vlan) {
2112 nd->vlan->nb_guest_devs++;
2113 }
2114 nb_nics++;
2115
2116 return idx;
2117 }
2118
2119 #if defined(CONFIG_SLIRP)
2120 static int net_init_slirp_configs(const char *name, const char *value, void *opaque)
2121 {
2122 struct slirp_config_str *config;
2123
2124 if (strcmp(name, "hostfwd") != 0 && strcmp(name, "guestfwd") != 0) {
2125 return 0;
2126 }
2127
2128 config = qemu_mallocz(sizeof(*config));
2129
2130 pstrcpy(config->str, sizeof(config->str), value);
2131
2132 if (!strcmp(name, "hostfwd")) {
2133 config->flags = SLIRP_CFG_HOSTFWD;
2134 }
2135
2136 config->next = slirp_configs;
2137 slirp_configs = config;
2138
2139 return 0;
2140 }
2141
2142 static int net_init_slirp(QemuOpts *opts,
2143 Monitor *mon,
2144 const char *name,
2145 VLANState *vlan)
2146 {
2147 struct slirp_config_str *config;
2148 const char *vhost;
2149 const char *vhostname;
2150 const char *vdhcp_start;
2151 const char *vnamesrv;
2152 const char *tftp_export;
2153 const char *bootfile;
2154 const char *smb_export;
2155 const char *vsmbsrv;
2156 char *vnet = NULL;
2157 int restricted = 0;
2158 int ret;
2159
2160 vhost = qemu_opt_get(opts, "host");
2161 vhostname = qemu_opt_get(opts, "hostname");
2162 vdhcp_start = qemu_opt_get(opts, "dhcpstart");
2163 vnamesrv = qemu_opt_get(opts, "dns");
2164 tftp_export = qemu_opt_get(opts, "tftp");
2165 bootfile = qemu_opt_get(opts, "bootfile");
2166 smb_export = qemu_opt_get(opts, "smb");
2167 vsmbsrv = qemu_opt_get(opts, "smbserver");
2168
2169 if (qemu_opt_get(opts, "ip")) {
2170 const char *ip = qemu_opt_get(opts, "ip");
2171 int l = strlen(ip) + strlen("/24") + 1;
2172
2173 vnet = qemu_malloc(l);
2174
2175 /* emulate legacy ip= parameter */
2176 pstrcpy(vnet, l, ip);
2177 pstrcat(vnet, l, "/24");
2178 }
2179
2180 if (qemu_opt_get(opts, "net")) {
2181 if (vnet) {
2182 qemu_free(vnet);
2183 }
2184 vnet = qemu_strdup(qemu_opt_get(opts, "net"));
2185 }
2186
2187 if (qemu_opt_get(opts, "restrict") &&
2188 qemu_opt_get(opts, "restrict")[0] == 'y') {
2189 restricted = 1;
2190 }
2191
2192 qemu_opt_foreach(opts, net_init_slirp_configs, NULL, 0);
2193
2194 ret = net_slirp_init(vlan, "user", name, restricted, vnet, vhost,
2195 vhostname, tftp_export, bootfile, vdhcp_start,
2196 vnamesrv, smb_export, vsmbsrv);
2197
2198 while (slirp_configs) {
2199 config = slirp_configs;
2200 slirp_configs = config->next;
2201 qemu_free(config);
2202 }
2203
2204 if (ret != -1 && vlan) {
2205 vlan->nb_host_devs++;
2206 }
2207
2208 qemu_free(vnet);
2209
2210 return ret;
2211 }
2212 #endif /* CONFIG_SLIRP */
2213
2214 static int net_init_socket(QemuOpts *opts,
2215 Monitor *mon,
2216 const char *name,
2217 VLANState *vlan)
2218 {
2219 if (qemu_opt_get(opts, "fd")) {
2220 int fd;
2221
2222 if (qemu_opt_get(opts, "listen") ||
2223 qemu_opt_get(opts, "connect") ||
2224 qemu_opt_get(opts, "mcast")) {
2225 qemu_error("listen=, connect= and mcast= is invalid with fd=\n");
2226 return -1;
2227 }
2228
2229 fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
2230 if (fd == -1) {
2231 return -1;
2232 }
2233
2234 if (!net_socket_fd_init(vlan, "socket", name, fd, 1)) {
2235 close(fd);
2236 return -1;
2237 }
2238 } else if (qemu_opt_get(opts, "listen")) {
2239 const char *listen;
2240
2241 if (qemu_opt_get(opts, "fd") ||
2242 qemu_opt_get(opts, "connect") ||
2243 qemu_opt_get(opts, "mcast")) {
2244 qemu_error("fd=, connect= and mcast= is invalid with listen=\n");
2245 return -1;
2246 }
2247
2248 listen = qemu_opt_get(opts, "listen");
2249
2250 if (net_socket_listen_init(vlan, "socket", name, listen) == -1) {
2251 return -1;
2252 }
2253 } else if (qemu_opt_get(opts, "connect")) {
2254 const char *connect;
2255
2256 if (qemu_opt_get(opts, "fd") ||
2257 qemu_opt_get(opts, "listen") ||
2258 qemu_opt_get(opts, "mcast")) {
2259 qemu_error("fd=, listen= and mcast= is invalid with connect=\n");
2260 return -1;
2261 }
2262
2263 connect = qemu_opt_get(opts, "connect");
2264
2265 if (net_socket_connect_init(vlan, "socket", name, connect) == -1) {
2266 return -1;
2267 }
2268 } else if (qemu_opt_get(opts, "mcast")) {
2269 const char *mcast;
2270
2271 if (qemu_opt_get(opts, "fd") ||
2272 qemu_opt_get(opts, "connect") ||
2273 qemu_opt_get(opts, "listen")) {
2274 qemu_error("fd=, connect= and listen= is invalid with mcast=\n");
2275 return -1;
2276 }
2277
2278 mcast = qemu_opt_get(opts, "mcast");
2279
2280 if (net_socket_mcast_init(vlan, "socket", name, mcast) == -1) {
2281 return -1;
2282 }
2283 } else {
2284 qemu_error("-socket requires fd=, listen=, connect= or mcast=\n");
2285 return -1;
2286 }
2287
2288 if (vlan) {
2289 vlan->nb_host_devs++;
2290 }
2291
2292 return 0;
2293 }
2294
2295 #ifdef CONFIG_VDE
2296 static int net_init_vde(QemuOpts *opts,
2297 Monitor *mon,
2298 const char *name,
2299 VLANState *vlan)
2300 {
2301 const char *sock;
2302 const char *group;
2303 int port, mode;
2304
2305 sock = qemu_opt_get(opts, "sock");
2306 group = qemu_opt_get(opts, "group");
2307
2308 port = qemu_opt_get_number(opts, "port", 0);
2309 mode = qemu_opt_get_number(opts, "mode", 0700);
2310
2311 if (net_vde_init(vlan, "vde", name, sock, port, group, mode) == -1) {
2312 return -1;
2313 }
2314
2315 if (vlan) {
2316 vlan->nb_host_devs++;
2317 }
2318
2319 return 0;
2320 }
2321 #endif
2322
2323 static int net_init_dump(QemuOpts *opts,
2324 Monitor *mon,
2325 const char *name,
2326 VLANState *vlan)
2327 {
2328 int len;
2329 const char *file;
2330 char def_file[128];
2331
2332 assert(vlan);
2333
2334 file = qemu_opt_get(opts, "file");
2335 if (!file) {
2336 snprintf(def_file, sizeof(def_file), "qemu-vlan%d.pcap", vlan->id);
2337 file = def_file;
2338 }
2339
2340 len = qemu_opt_get_size(opts, "len", 65536);
2341
2342 return net_dump_init(vlan, "dump", name, file, len);
2343 }
2344
2345 #define NET_COMMON_PARAMS_DESC \
2346 { \
2347 .name = "type", \
2348 .type = QEMU_OPT_STRING, \
2349 .help = "net client type (nic, tap etc.)", \
2350 }, { \
2351 .name = "vlan", \
2352 .type = QEMU_OPT_NUMBER, \
2353 .help = "vlan number", \
2354 }, { \
2355 .name = "name", \
2356 .type = QEMU_OPT_STRING, \
2357 .help = "identifier for monitor commands", \
2358 }
2359
2360 typedef int (*net_client_init_func)(QemuOpts *opts,
2361 Monitor *mon,
2362 const char *name,
2363 VLANState *vlan);
2364
2365 /* magic number, but compiler will warn if too small */
2366 #define NET_MAX_DESC 20
2367
2368 static struct {
2369 const char *type;
2370 net_client_init_func init;
2371 QemuOptDesc desc[NET_MAX_DESC];
2372 } net_client_types[] = {
2373 {
2374 .type = "none",
2375 .desc = {
2376 NET_COMMON_PARAMS_DESC,
2377 { /* end of list */ }
2378 },
2379 }, {
2380 .type = "nic",
2381 .init = net_init_nic,
2382 .desc = {
2383 NET_COMMON_PARAMS_DESC,
2384 {
2385 .name = "netdev",
2386 .type = QEMU_OPT_STRING,
2387 .help = "id of -netdev to connect to",
2388 },
2389 {
2390 .name = "macaddr",
2391 .type = QEMU_OPT_STRING,
2392 .help = "MAC address",
2393 }, {
2394 .name = "model",
2395 .type = QEMU_OPT_STRING,
2396 .help = "device model (e1000, rtl8139, virtio etc.)",
2397 }, {
2398 .name = "addr",
2399 .type = QEMU_OPT_STRING,
2400 .help = "PCI device address",
2401 }, {
2402 .name = "vectors",
2403 .type = QEMU_OPT_NUMBER,
2404 .help = "number of MSI-x vectors, 0 to disable MSI-X",
2405 },
2406 { /* end of list */ }
2407 },
2408 #ifdef CONFIG_SLIRP
2409 }, {
2410 .type = "user",
2411 .init = net_init_slirp,
2412 .desc = {
2413 NET_COMMON_PARAMS_DESC,
2414 {
2415 .name = "hostname",
2416 .type = QEMU_OPT_STRING,
2417 .help = "client hostname reported by the builtin DHCP server",
2418 }, {
2419 .name = "restrict",
2420 .type = QEMU_OPT_STRING,
2421 .help = "isolate the guest from the host (y|yes|n|no)",
2422 }, {
2423 .name = "ip",
2424 .type = QEMU_OPT_STRING,
2425 .help = "legacy parameter, use net= instead",
2426 }, {
2427 .name = "net",
2428 .type = QEMU_OPT_STRING,
2429 .help = "IP address and optional netmask",
2430 }, {
2431 .name = "host",
2432 .type = QEMU_OPT_STRING,
2433 .help = "guest-visible address of the host",
2434 }, {
2435 .name = "tftp",
2436 .type = QEMU_OPT_STRING,
2437 .help = "root directory of the built-in TFTP server",
2438 }, {
2439 .name = "bootfile",
2440 .type = QEMU_OPT_STRING,
2441 .help = "BOOTP filename, for use with tftp=",
2442 }, {
2443 .name = "dhcpstart",
2444 .type = QEMU_OPT_STRING,
2445 .help = "the first of the 16 IPs the built-in DHCP server can assign",
2446 }, {
2447 .name = "dns",
2448 .type = QEMU_OPT_STRING,
2449 .help = "guest-visible address of the virtual nameserver",
2450 }, {
2451 .name = "smb",
2452 .type = QEMU_OPT_STRING,
2453 .help = "root directory of the built-in SMB server",
2454 }, {
2455 .name = "smbserver",
2456 .type = QEMU_OPT_STRING,
2457 .help = "IP address of the built-in SMB server",
2458 }, {
2459 .name = "hostfwd",
2460 .type = QEMU_OPT_STRING,
2461 .help = "guest port number to forward incoming TCP or UDP connections",
2462 }, {
2463 .name = "guestfwd",
2464 .type = QEMU_OPT_STRING,
2465 .help = "IP address and port to forward guest TCP connections",
2466 },
2467 { /* end of list */ }
2468 },
2469 #endif
2470 }, {
2471 .type = "tap",
2472 .init = net_init_tap,
2473 .desc = {
2474 NET_COMMON_PARAMS_DESC,
2475 {
2476 .name = "ifname",
2477 .type = QEMU_OPT_STRING,
2478 .help = "interface name",
2479 },
2480 #ifndef _WIN32
2481 {
2482 .name = "fd",
2483 .type = QEMU_OPT_STRING,
2484 .help = "file descriptor of an already opened tap",
2485 }, {
2486 .name = "script",
2487 .type = QEMU_OPT_STRING,
2488 .help = "script to initialize the interface",
2489 }, {
2490 .name = "downscript",
2491 .type = QEMU_OPT_STRING,
2492 .help = "script to shut down the interface",
2493 }, {
2494 .name = "sndbuf",
2495 .type = QEMU_OPT_SIZE,
2496 .help = "send buffer limit"
2497 }, {
2498 .name = "vnet_hdr",
2499 .type = QEMU_OPT_BOOL,
2500 .help = "enable the IFF_VNET_HDR flag on the tap interface"
2501 },
2502 #endif /* _WIN32 */
2503 { /* end of list */ }
2504 },
2505 }, {
2506 .type = "socket",
2507 .init = net_init_socket,
2508 .desc = {
2509 NET_COMMON_PARAMS_DESC,
2510 {
2511 .name = "fd",
2512 .type = QEMU_OPT_STRING,
2513 .help = "file descriptor of an already opened socket",
2514 }, {
2515 .name = "listen",
2516 .type = QEMU_OPT_STRING,
2517 .help = "port number, and optional hostname, to listen on",
2518 }, {
2519 .name = "connect",
2520 .type = QEMU_OPT_STRING,
2521 .help = "port number, and optional hostname, to connect to",
2522 }, {
2523 .name = "mcast",
2524 .type = QEMU_OPT_STRING,
2525 .help = "UDP multicast address and port number",
2526 },
2527 { /* end of list */ }
2528 },
2529 #ifdef CONFIG_VDE
2530 }, {
2531 .type = "vde",
2532 .init = net_init_vde,
2533 .desc = {
2534 NET_COMMON_PARAMS_DESC,
2535 {
2536 .name = "sock",
2537 .type = QEMU_OPT_STRING,
2538 .help = "socket path",
2539 }, {
2540 .name = "port",
2541 .type = QEMU_OPT_NUMBER,
2542 .help = "port number",
2543 }, {
2544 .name = "group",
2545 .type = QEMU_OPT_STRING,
2546 .help = "group owner of socket",
2547 }, {
2548 .name = "mode",
2549 .type = QEMU_OPT_NUMBER,
2550 .help = "permissions for socket",
2551 },
2552 { /* end of list */ }
2553 },
2554 #endif
2555 }, {
2556 .type = "dump",
2557 .init = net_init_dump,
2558 .desc = {
2559 NET_COMMON_PARAMS_DESC,
2560 {
2561 .name = "len",
2562 .type = QEMU_OPT_SIZE,
2563 .help = "per-packet size limit (64k default)",
2564 }, {
2565 .name = "file",
2566 .type = QEMU_OPT_STRING,
2567 .help = "dump file path (default is qemu-vlan0.pcap)",
2568 },
2569 { /* end of list */ }
2570 },
2571 },
2572 { /* end of list */ }
2573 };
2574
2575 int net_client_init(Monitor *mon, QemuOpts *opts, int is_netdev)
2576 {
2577 const char *name;
2578 const char *type;
2579 int i;
2580
2581 type = qemu_opt_get(opts, "type");
2582 if (!type) {
2583 qemu_error("No type specified for -net\n");
2584 return -1;
2585 }
2586
2587 if (is_netdev) {
2588 if (strcmp(type, "tap") != 0 &&
2589 #ifdef CONFIG_SLIRP
2590 strcmp(type, "user") != 0 &&
2591 #endif
2592 #ifdef CONFIG_VDE
2593 strcmp(type, "vde") != 0 &&
2594 #endif
2595 strcmp(type, "socket") != 0) {
2596 qemu_error("The '%s' network backend type is not valid with -netdev\n",
2597 type);
2598 return -1;
2599 }
2600
2601 if (qemu_opt_get(opts, "vlan")) {
2602 qemu_error("The 'vlan' parameter is not valid with -netdev\n");
2603 return -1;
2604 }
2605 if (qemu_opt_get(opts, "name")) {
2606 qemu_error("The 'name' parameter is not valid with -netdev\n");
2607 return -1;
2608 }
2609 if (!qemu_opts_id(opts)) {
2610 qemu_error("The id= parameter is required with -netdev\n");
2611 return -1;
2612 }
2613 }
2614
2615 name = qemu_opts_id(opts);
2616 if (!name) {
2617 name = qemu_opt_get(opts, "name");
2618 }
2619
2620 for (i = 0; net_client_types[i].type != NULL; i++) {
2621 if (!strcmp(net_client_types[i].type, type)) {
2622 VLANState *vlan = NULL;
2623
2624 if (qemu_opts_validate(opts, &net_client_types[i].desc[0]) == -1) {
2625 return -1;
2626 }
2627
2628 /* Do not add to a vlan if it's a -netdev or a nic with a
2629 * netdev= parameter. */
2630 if (!(is_netdev ||
2631 (strcmp(type, "nic") == 0 && qemu_opt_get(opts, "netdev")))) {
2632 vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
2633 }
2634
2635 if (net_client_types[i].init) {
2636 return net_client_types[i].init(opts, mon, name, vlan);
2637 } else {
2638 return 0;
2639 }
2640 }
2641 }
2642
2643 qemu_error("Invalid -net type '%s'\n", type);
2644 return -1;
2645 }
2646
2647 void net_client_uninit(NICInfo *nd)
2648 {
2649 if (nd->vlan) {
2650 nd->vlan->nb_guest_devs--;
2651 }
2652 nb_nics--;
2653
2654 qemu_free(nd->model);
2655 qemu_free(nd->name);
2656 qemu_free(nd->devaddr);
2657
2658 nd->used = 0;
2659 }
2660
2661 static int net_host_check_device(const char *device)
2662 {
2663 int i;
2664 const char *valid_param_list[] = { "tap", "socket", "dump"
2665 #ifdef CONFIG_SLIRP
2666 ,"user"
2667 #endif
2668 #ifdef CONFIG_VDE
2669 ,"vde"
2670 #endif
2671 };
2672 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2673 if (!strncmp(valid_param_list[i], device,
2674 strlen(valid_param_list[i])))
2675 return 1;
2676 }
2677
2678 return 0;
2679 }
2680
2681 void net_host_device_add(Monitor *mon, const QDict *qdict)
2682 {
2683 const char *device = qdict_get_str(qdict, "device");
2684 const char *opts_str = qdict_get_try_str(qdict, "opts");
2685 QemuOpts *opts;
2686
2687 if (!net_host_check_device(device)) {
2688 monitor_printf(mon, "invalid host network device %s\n", device);
2689 return;
2690 }
2691
2692 opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", NULL);
2693 if (!opts) {
2694 monitor_printf(mon, "parsing network options '%s' failed\n",
2695 opts_str ? opts_str : "");
2696 return;
2697 }
2698
2699 qemu_opt_set(opts, "type", device);
2700
2701 if (net_client_init(mon, opts, 0) < 0) {
2702 monitor_printf(mon, "adding host network device %s failed\n", device);
2703 }
2704 }
2705
2706 void net_host_device_remove(Monitor *mon, const QDict *qdict)
2707 {
2708 VLANClientState *vc;
2709 int vlan_id = qdict_get_int(qdict, "vlan_id");
2710 const char *device = qdict_get_str(qdict, "device");
2711
2712 vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
2713 if (!vc) {
2714 return;
2715 }
2716 if (!net_host_check_device(vc->model)) {
2717 monitor_printf(mon, "invalid host network device %s\n", device);
2718 return;
2719 }
2720 qemu_del_vlan_client(vc);
2721 }
2722
2723 void net_set_boot_mask(int net_boot_mask)
2724 {
2725 int i;
2726
2727 /* Only the first four NICs may be bootable */
2728 net_boot_mask = net_boot_mask & 0xF;
2729
2730 for (i = 0; i < nb_nics; i++) {
2731 if (net_boot_mask & (1 << i)) {
2732 nd_table[i].bootable = 1;
2733 net_boot_mask &= ~(1 << i);
2734 }
2735 }
2736
2737 if (net_boot_mask) {
2738 fprintf(stderr, "Cannot boot from non-existent NIC\n");
2739 exit(1);
2740 }
2741 }
2742
2743 void do_info_network(Monitor *mon)
2744 {
2745 VLANState *vlan;
2746
2747 QTAILQ_FOREACH(vlan, &vlans, next) {
2748 VLANClientState *vc;
2749
2750 monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2751
2752 QTAILQ_FOREACH(vc, &vlan->clients, next) {
2753 monitor_printf(mon, " %s: %s\n", vc->name, vc->info_str);
2754 }
2755 }
2756 }
2757
2758 void do_set_link(Monitor *mon, const QDict *qdict)
2759 {
2760 VLANState *vlan;
2761 VLANClientState *vc = NULL;
2762 const char *name = qdict_get_str(qdict, "name");
2763 const char *up_or_down = qdict_get_str(qdict, "up_or_down");
2764
2765 QTAILQ_FOREACH(vlan, &vlans, next) {
2766 QTAILQ_FOREACH(vc, &vlan->clients, next) {
2767 if (strcmp(vc->name, name) == 0) {
2768 goto done;
2769 }
2770 }
2771 }
2772 done:
2773
2774 if (!vc) {
2775 monitor_printf(mon, "could not find network device '%s'\n", name);
2776 return;
2777 }
2778
2779 if (strcmp(up_or_down, "up") == 0)
2780 vc->link_down = 0;
2781 else if (strcmp(up_or_down, "down") == 0)
2782 vc->link_down = 1;
2783 else
2784 monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2785 "valid\n", up_or_down);
2786
2787 if (vc->link_status_changed)
2788 vc->link_status_changed(vc);
2789 }
2790
2791 void net_cleanup(void)
2792 {
2793 VLANState *vlan;
2794 VLANClientState *vc, *next_vc;
2795
2796 QTAILQ_FOREACH(vlan, &vlans, next) {
2797 QTAILQ_FOREACH_SAFE(vc, &vlan->clients, next, next_vc) {
2798 qemu_del_vlan_client(vc);
2799 }
2800 }
2801
2802 QTAILQ_FOREACH_SAFE(vc, &non_vlan_clients, next, next_vc) {
2803 qemu_del_vlan_client(vc);
2804 }
2805 }
2806
2807 static void net_check_clients(void)
2808 {
2809 VLANState *vlan;
2810
2811 QTAILQ_FOREACH(vlan, &vlans, next) {
2812 if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2813 continue;
2814 if (vlan->nb_guest_devs == 0)
2815 fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2816 if (vlan->nb_host_devs == 0)
2817 fprintf(stderr,
2818 "Warning: vlan %d is not connected to host network\n",
2819 vlan->id);
2820 }
2821 }
2822
2823 static int net_init_client(QemuOpts *opts, void *dummy)
2824 {
2825 if (net_client_init(NULL, opts, 0) < 0)
2826 return -1;
2827 return 0;
2828 }
2829
2830 static int net_init_netdev(QemuOpts *opts, void *dummy)
2831 {
2832 return net_client_init(NULL, opts, 1);
2833 }
2834
2835 int net_init_clients(void)
2836 {
2837 if (QTAILQ_EMPTY(&qemu_net_opts.head)) {
2838 /* if no clients, we use a default config */
2839 qemu_opts_set(&qemu_net_opts, NULL, "type", "nic");
2840 #ifdef CONFIG_SLIRP
2841 qemu_opts_set(&qemu_net_opts, NULL, "type", "user");
2842 #endif
2843 }
2844
2845 QTAILQ_INIT(&vlans);
2846 QTAILQ_INIT(&non_vlan_clients);
2847
2848 if (qemu_opts_foreach(&qemu_netdev_opts, net_init_netdev, NULL, 1) == -1)
2849 return -1;
2850
2851 if (qemu_opts_foreach(&qemu_net_opts, net_init_client, NULL, 1) == -1) {
2852 return -1;
2853 }
2854
2855 net_check_clients();
2856
2857 return 0;
2858 }
2859
2860 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
2861 {
2862 #if defined(CONFIG_SLIRP)
2863 /* handle legacy -net channel,port:chr */
2864 if (!strcmp(opts_list->name, "net") &&
2865 !strncmp(optarg, "channel,", strlen("channel,"))) {
2866 int ret;
2867
2868 optarg += strlen("channel,");
2869
2870 if (QTAILQ_EMPTY(&slirp_stacks)) {
2871 struct slirp_config_str *config;
2872
2873 config = qemu_malloc(sizeof(*config));
2874 pstrcpy(config->str, sizeof(config->str), optarg);
2875 config->flags = SLIRP_CFG_LEGACY;
2876 config->next = slirp_configs;
2877 slirp_configs = config;
2878 ret = 0;
2879 } else {
2880 ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);
2881 }
2882
2883 return ret;
2884 }
2885 #endif
2886 if (!qemu_opts_parse(opts_list, optarg, "type")) {
2887 return -1;
2888 }
2889
2890 return 0;
2891 }
QEmu