?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
vmstate: factor vmstate_offset_buffer
[qemu.git] / net.c
blob75a01d2a1cebe88c9bf2b60a0c9723b330967bde
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 #ifdef __NetBSD__
46 #include <net/if_tap.h>
47 #endif
48 #ifdef __linux__
49 #include <linux/if_tun.h>
50 #endif
51 #include <arpa/inet.h>
52 #include <dirent.h>
53 #include <netdb.h>
54 #include <sys/select.h>
55 #ifdef CONFIG_BSD
56 #include <sys/stat.h>
57 #if defined(__FreeBSD__) || defined(__DragonFly__)
58 #include <libutil.h>
59 #else
60 #include <util.h>
61 #endif
62 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
63 #include <freebsd/stdlib.h>
64 #else
65 #ifdef __linux__
66 #include <pty.h>
67 #include <malloc.h>
68 #include <linux/rtc.h>
69
70 /* For the benefit of older linux systems which don't supply it,
71 we use a local copy of hpet.h. */
72 /* #include <linux/hpet.h> */
73 #include "hpet.h"
74
75 #include <linux/ppdev.h>
76 #include <linux/parport.h>
77 #endif
78 #ifdef __sun__
79 #include <sys/stat.h>
80 #include <sys/ethernet.h>
81 #include <sys/sockio.h>
82 #include <netinet/arp.h>
83 #include <netinet/in.h>
84 #include <netinet/in_systm.h>
85 #include <netinet/ip.h>
86 #include <netinet/ip_icmp.h> // must come after ip.h
87 #include <netinet/udp.h>
88 #include <netinet/tcp.h>
89 #include <net/if.h>
90 #include <syslog.h>
91 #include <stropts.h>
92 #endif
93 #endif
94 #endif
95
96 #if defined(__OpenBSD__)
97 #include <util.h>
98 #endif
99
100 #if defined(CONFIG_VDE)
101 #include <libvdeplug.h>
102 #endif
103
104 #include "qemu-common.h"
105 #include "net.h"
106 #include "monitor.h"
107 #include "sysemu.h"
108 #include "qemu-timer.h"
109 #include "qemu-char.h"
110 #include "audio/audio.h"
111 #include "qemu_socket.h"
112 #include "qemu-log.h"
113 #include "qemu-config.h"
114
115 #include "slirp/libslirp.h"
116
117 static QTAILQ_HEAD(, VLANState) vlans;
118 static QTAILQ_HEAD(, VLANClientState) non_vlan_clients;
119
120 /***********************************************************/
121 /* network device redirectors */
122
123 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
124 static void hex_dump(FILE *f, const uint8_t *buf, int size)
125 {
126 int len, i, j, c;
127
128 for(i=0;i<size;i+=16) {
129 len = size - i;
130 if (len > 16)
131 len = 16;
132 fprintf(f, "%08x ", i);
133 for(j=0;j<16;j++) {
134 if (j < len)
135 fprintf(f, " %02x", buf[i+j]);
136 else
137 fprintf(f, " ");
138 }
139 fprintf(f, " ");
140 for(j=0;j<len;j++) {
141 c = buf[i+j];
142 if (c < ' ' || c > '~')
143 c = '.';
144 fprintf(f, "%c", c);
145 }
146 fprintf(f, "\n");
147 }
148 }
149 #endif
150
151 static int parse_macaddr(uint8_t *macaddr, const char *p)
152 {
153 int i;
154 char *last_char;
155 long int offset;
156
157 errno = 0;
158 offset = strtol(p, &last_char, 0);
159 if (0 == errno && '\0' == *last_char &&
160 offset >= 0 && offset <= 0xFFFFFF) {
161 macaddr[3] = (offset & 0xFF0000) >> 16;
162 macaddr[4] = (offset & 0xFF00) >> 8;
163 macaddr[5] = offset & 0xFF;
164 return 0;
165 } else {
166 for(i = 0; i < 6; i++) {
167 macaddr[i] = strtol(p, (char **)&p, 16);
168 if (i == 5) {
169 if (*p != '\0')
170 return -1;
171 } else {
172 if (*p != ':' && *p != '-')
173 return -1;
174 p++;
175 }
176 }
177 return 0;
178 }
179
180 return -1;
181 }
182
183 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
184 {
185 const char *p, *p1;
186 int len;
187 p = *pp;
188 p1 = strchr(p, sep);
189 if (!p1)
190 return -1;
191 len = p1 - p;
192 p1++;
193 if (buf_size > 0) {
194 if (len > buf_size - 1)
195 len = buf_size - 1;
196 memcpy(buf, p, len);
197 buf[len] = '\0';
198 }
199 *pp = p1;
200 return 0;
201 }
202
203 int parse_host_src_port(struct sockaddr_in *haddr,
204 struct sockaddr_in *saddr,
205 const char *input_str)
206 {
207 char *str = strdup(input_str);
208 char *host_str = str;
209 char *src_str;
210 const char *src_str2;
211 char *ptr;
212
213 /*
214 * Chop off any extra arguments at the end of the string which
215 * would start with a comma, then fill in the src port information
216 * if it was provided else use the "any address" and "any port".
217 */
218 if ((ptr = strchr(str,',')))
219 *ptr = '\0';
220
221 if ((src_str = strchr(input_str,'@'))) {
222 *src_str = '\0';
223 src_str++;
224 }
225
226 if (parse_host_port(haddr, host_str) < 0)
227 goto fail;
228
229 src_str2 = src_str;
230 if (!src_str || *src_str == '\0')
231 src_str2 = ":0";
232
233 if (parse_host_port(saddr, src_str2) < 0)
234 goto fail;
235
236 free(str);
237 return(0);
238
239 fail:
240 free(str);
241 return -1;
242 }
243
244 int parse_host_port(struct sockaddr_in *saddr, const char *str)
245 {
246 char buf[512];
247 struct hostent *he;
248 const char *p, *r;
249 int port;
250
251 p = str;
252 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
253 return -1;
254 saddr->sin_family = AF_INET;
255 if (buf[0] == '\0') {
256 saddr->sin_addr.s_addr = 0;
257 } else {
258 if (qemu_isdigit(buf[0])) {
259 if (!inet_aton(buf, &saddr->sin_addr))
260 return -1;
261 } else {
262 if ((he = gethostbyname(buf)) == NULL)
263 return - 1;
264 saddr->sin_addr = *(struct in_addr *)he->h_addr;
265 }
266 }
267 port = strtol(p, (char **)&r, 0);
268 if (r == p)
269 return -1;
270 saddr->sin_port = htons(port);
271 return 0;
272 }
273
274 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
275 {
276 snprintf(vc->info_str, sizeof(vc->info_str),
277 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
278 vc->model,
279 macaddr[0], macaddr[1], macaddr[2],
280 macaddr[3], macaddr[4], macaddr[5]);
281 }
282
283 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
284 {
285 static int index = 0;
286 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
287
288 if (memcmp(macaddr, &zero, sizeof(zero)) != 0)
289 return;
290 macaddr->a[0] = 0x52;
291 macaddr->a[1] = 0x54;
292 macaddr->a[2] = 0x00;
293 macaddr->a[3] = 0x12;
294 macaddr->a[4] = 0x34;
295 macaddr->a[5] = 0x56 + index++;
296 }
297
298 static char *assign_name(VLANClientState *vc1, const char *model)
299 {
300 VLANState *vlan;
301 char buf[256];
302 int id = 0;
303
304 QTAILQ_FOREACH(vlan, &vlans, next) {
305 VLANClientState *vc;
306
307 QTAILQ_FOREACH(vc, &vlan->clients, next) {
308 if (vc != vc1 && strcmp(vc->model, model) == 0) {
309 id++;
310 }
311 }
312 }
313
314 snprintf(buf, sizeof(buf), "%s.%d", model, id);
315
316 return qemu_strdup(buf);
317 }
318
319 static ssize_t qemu_deliver_packet(VLANClientState *sender,
320 const uint8_t *data,
321 size_t size,
322 void *opaque);
323 static ssize_t qemu_deliver_packet_iov(VLANClientState *sender,
324 const struct iovec *iov,
325 int iovcnt,
326 void *opaque);
327
328 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
329 VLANClientState *peer,
330 const char *model,
331 const char *name,
332 NetCanReceive *can_receive,
333 NetReceive *receive,
334 NetReceiveIOV *receive_iov,
335 NetCleanup *cleanup,
336 void *opaque)
337 {
338 VLANClientState *vc;
339
340 vc = qemu_mallocz(sizeof(VLANClientState));
341
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_iov = receive_iov;
350 vc->cleanup = cleanup;
351 vc->opaque = opaque;
352
353 if (vlan) {
354 assert(!peer);
355 vc->vlan = vlan;
356 QTAILQ_INSERT_TAIL(&vc->vlan->clients, vc, next);
357 } else {
358 if (peer) {
359 vc->peer = peer;
360 peer->peer = vc;
361 }
362 QTAILQ_INSERT_TAIL(&non_vlan_clients, vc, next);
363
364 vc->send_queue = qemu_new_net_queue(qemu_deliver_packet,
365 qemu_deliver_packet_iov,
366 vc);
367 }
368
369 return vc;
370 }
371
372 void qemu_del_vlan_client(VLANClientState *vc)
373 {
374 if (vc->vlan) {
375 QTAILQ_REMOVE(&vc->vlan->clients, vc, next);
376 } else {
377 if (vc->send_queue) {
378 qemu_del_net_queue(vc->send_queue);
379 }
380 QTAILQ_REMOVE(&non_vlan_clients, vc, next);
381 if (vc->peer) {
382 vc->peer->peer = NULL;
383 }
384 }
385
386 if (vc->cleanup) {
387 vc->cleanup(vc);
388 }
389
390 qemu_free(vc->name);
391 qemu_free(vc->model);
392 qemu_free(vc);
393 }
394
395 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
396 {
397 VLANClientState *vc;
398
399 QTAILQ_FOREACH(vc, &vlan->clients, next) {
400 if (vc->opaque == opaque) {
401 return vc;
402 }
403 }
404
405 return NULL;
406 }
407
408 static VLANClientState *
409 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
410 const char *client_str)
411 {
412 VLANState *vlan;
413 VLANClientState *vc;
414
415 vlan = qemu_find_vlan(vlan_id, 0);
416 if (!vlan) {
417 monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
418 return NULL;
419 }
420
421 QTAILQ_FOREACH(vc, &vlan->clients, next) {
422 if (!strcmp(vc->name, client_str)) {
423 break;
424 }
425 }
426 if (!vc) {
427 monitor_printf(mon, "can't find device %s on VLAN %d\n",
428 client_str, vlan_id);
429 }
430
431 return vc;
432 }
433
434 int qemu_can_send_packet(VLANClientState *sender)
435 {
436 VLANState *vlan = sender->vlan;
437 VLANClientState *vc;
438
439 if (sender->peer) {
440 if (!sender->peer->can_receive ||
441 sender->peer->can_receive(sender->peer)) {
442 return 1;
443 } else {
444 return 0;
445 }
446 }
447
448 if (!sender->vlan) {
449 return 1;
450 }
451
452 QTAILQ_FOREACH(vc, &vlan->clients, next) {
453 if (vc == sender) {
454 continue;
455 }
456
457 /* no can_receive() handler, they can always receive */
458 if (!vc->can_receive || vc->can_receive(vc)) {
459 return 1;
460 }
461 }
462 return 0;
463 }
464
465 static ssize_t qemu_deliver_packet(VLANClientState *sender,
466 const uint8_t *data,
467 size_t size,
468 void *opaque)
469 {
470 VLANClientState *vc = opaque;
471
472 if (vc->link_down) {
473 return size;
474 }
475
476 return vc->receive(vc, data, size);
477 }
478
479 static ssize_t qemu_vlan_deliver_packet(VLANClientState *sender,
480 const uint8_t *buf,
481 size_t size,
482 void *opaque)
483 {
484 VLANState *vlan = opaque;
485 VLANClientState *vc;
486 int ret = -1;
487
488 QTAILQ_FOREACH(vc, &vlan->clients, next) {
489 ssize_t len;
490
491 if (vc == sender) {
492 continue;
493 }
494
495 if (vc->link_down) {
496 ret = size;
497 continue;
498 }
499
500 len = vc->receive(vc, buf, size);
501
502 ret = (ret >= 0) ? ret : len;
503 }
504
505 return ret;
506 }
507
508 void qemu_purge_queued_packets(VLANClientState *vc)
509 {
510 NetQueue *queue;
511
512 if (!vc->peer && !vc->vlan) {
513 return;
514 }
515
516 if (vc->peer) {
517 queue = vc->peer->send_queue;
518 } else {
519 queue = vc->vlan->send_queue;
520 }
521
522 qemu_net_queue_purge(queue, vc);
523 }
524
525 void qemu_flush_queued_packets(VLANClientState *vc)
526 {
527 NetQueue *queue;
528
529 if (vc->vlan) {
530 queue = vc->vlan->send_queue;
531 } else {
532 queue = vc->send_queue;
533 }
534
535 qemu_net_queue_flush(queue);
536 }
537
538 ssize_t qemu_send_packet_async(VLANClientState *sender,
539 const uint8_t *buf, int size,
540 NetPacketSent *sent_cb)
541 {
542 NetQueue *queue;
543
544 #ifdef DEBUG_NET
545 printf("qemu_send_packet_async:\n");
546 hex_dump(stdout, buf, size);
547 #endif
548
549 if (sender->link_down || (!sender->peer && !sender->vlan)) {
550 return size;
551 }
552
553 if (sender->peer) {
554 queue = sender->peer->send_queue;
555 } else {
556 queue = sender->vlan->send_queue;
557 }
558
559 return qemu_net_queue_send(queue, sender, buf, size, sent_cb);
560 }
561
562 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
563 {
564 qemu_send_packet_async(vc, buf, size, NULL);
565 }
566
567 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
568 int iovcnt)
569 {
570 uint8_t buffer[4096];
571 size_t offset = 0;
572 int i;
573
574 for (i = 0; i < iovcnt; i++) {
575 size_t len;
576
577 len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
578 memcpy(buffer + offset, iov[i].iov_base, len);
579 offset += len;
580 }
581
582 return vc->receive(vc, buffer, offset);
583 }
584
585 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
586 {
587 size_t offset = 0;
588 int i;
589
590 for (i = 0; i < iovcnt; i++)
591 offset += iov[i].iov_len;
592 return offset;
593 }
594
595 static ssize_t qemu_deliver_packet_iov(VLANClientState *sender,
596 const struct iovec *iov,
597 int iovcnt,
598 void *opaque)
599 {
600 VLANClientState *vc = opaque;
601
602 if (vc->link_down) {
603 return calc_iov_length(iov, iovcnt);
604 }
605
606 if (vc->receive_iov) {
607 return vc->receive_iov(vc, iov, iovcnt);
608 } else {
609 return vc_sendv_compat(vc, iov, iovcnt);
610 }
611 }
612
613 static ssize_t qemu_vlan_deliver_packet_iov(VLANClientState *sender,
614 const struct iovec *iov,
615 int iovcnt,
616 void *opaque)
617 {
618 VLANState *vlan = opaque;
619 VLANClientState *vc;
620 ssize_t ret = -1;
621
622 QTAILQ_FOREACH(vc, &vlan->clients, next) {
623 ssize_t len;
624
625 if (vc == sender) {
626 continue;
627 }
628
629 if (vc->link_down) {
630 ret = calc_iov_length(iov, iovcnt);
631 continue;
632 }
633
634 if (vc->receive_iov) {
635 len = vc->receive_iov(vc, iov, iovcnt);
636 } else {
637 len = vc_sendv_compat(vc, iov, iovcnt);
638 }
639
640 ret = (ret >= 0) ? ret : len;
641 }
642
643 return ret;
644 }
645
646 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
647 const struct iovec *iov, int iovcnt,
648 NetPacketSent *sent_cb)
649 {
650 NetQueue *queue;
651
652 if (sender->link_down || (!sender->peer && !sender->vlan)) {
653 return calc_iov_length(iov, iovcnt);
654 }
655
656 if (sender->peer) {
657 queue = sender->peer->send_queue;
658 } else {
659 queue = sender->vlan->send_queue;
660 }
661
662 return qemu_net_queue_send_iov(queue, sender, iov, iovcnt, sent_cb);
663 }
664
665 ssize_t
666 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
667 {
668 return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
669 }
670
671 #if defined(CONFIG_SLIRP)
672
673 /* slirp network adapter */
674
675 #define SLIRP_CFG_HOSTFWD 1
676 #define SLIRP_CFG_LEGACY 2
677
678 struct slirp_config_str {
679 struct slirp_config_str *next;
680 int flags;
681 char str[1024];
682 int legacy_format;
683 };
684
685 typedef struct SlirpState {
686 QTAILQ_ENTRY(SlirpState) entry;
687 VLANClientState *vc;
688 Slirp *slirp;
689 #ifndef _WIN32
690 char smb_dir[128];
691 #endif
692 } SlirpState;
693
694 static struct slirp_config_str *slirp_configs;
695 const char *legacy_tftp_prefix;
696 const char *legacy_bootp_filename;
697 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
698 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
699
700 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
701 int legacy_format);
702 static int slirp_guestfwd(SlirpState *s, const char *config_str,
703 int legacy_format);
704
705 #ifndef _WIN32
706 static const char *legacy_smb_export;
707
708 static int slirp_smb(SlirpState *s, const char *exported_dir,
709 struct in_addr vserver_addr);
710 static void slirp_smb_cleanup(SlirpState *s);
711 #else
712 static inline void slirp_smb_cleanup(SlirpState *s) { }
713 #endif
714
715 int slirp_can_output(void *opaque)
716 {
717 SlirpState *s = opaque;
718
719 return qemu_can_send_packet(s->vc);
720 }
721
722 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
723 {
724 SlirpState *s = opaque;
725
726 #ifdef DEBUG_SLIRP
727 printf("slirp output:\n");
728 hex_dump(stdout, pkt, pkt_len);
729 #endif
730 qemu_send_packet(s->vc, pkt, pkt_len);
731 }
732
733 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
734 {
735 SlirpState *s = vc->opaque;
736
737 #ifdef DEBUG_SLIRP
738 printf("slirp input:\n");
739 hex_dump(stdout, buf, size);
740 #endif
741 slirp_input(s->slirp, buf, size);
742 return size;
743 }
744
745 static void net_slirp_cleanup(VLANClientState *vc)
746 {
747 SlirpState *s = vc->opaque;
748
749 slirp_cleanup(s->slirp);
750 slirp_smb_cleanup(s);
751 QTAILQ_REMOVE(&slirp_stacks, s, entry);
752 qemu_free(s);
753 }
754
755 static int net_slirp_init(VLANState *vlan, const char *model,
756 const char *name, int restricted,
757 const char *vnetwork, const char *vhost,
758 const char *vhostname, const char *tftp_export,
759 const char *bootfile, const char *vdhcp_start,
760 const char *vnameserver, const char *smb_export,
761 const char *vsmbserver)
762 {
763 /* default settings according to historic slirp */
764 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
765 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
766 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
767 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
768 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
769 #ifndef _WIN32
770 struct in_addr smbsrv = { .s_addr = 0 };
771 #endif
772 SlirpState *s;
773 char buf[20];
774 uint32_t addr;
775 int shift;
776 char *end;
777 struct slirp_config_str *config;
778
779 if (!tftp_export) {
780 tftp_export = legacy_tftp_prefix;
781 }
782 if (!bootfile) {
783 bootfile = legacy_bootp_filename;
784 }
785
786 if (vnetwork) {
787 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
788 if (!inet_aton(vnetwork, &net)) {
789 return -1;
790 }
791 addr = ntohl(net.s_addr);
792 if (!(addr & 0x80000000)) {
793 mask.s_addr = htonl(0xff000000); /* class A */
794 } else if ((addr & 0xfff00000) == 0xac100000) {
795 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
796 } else if ((addr & 0xc0000000) == 0x80000000) {
797 mask.s_addr = htonl(0xffff0000); /* class B */
798 } else if ((addr & 0xffff0000) == 0xc0a80000) {
799 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
800 } else if ((addr & 0xffff0000) == 0xc6120000) {
801 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
802 } else if ((addr & 0xe0000000) == 0xe0000000) {
803 mask.s_addr = htonl(0xffffff00); /* class C */
804 } else {
805 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
806 }
807 } else {
808 if (!inet_aton(buf, &net)) {
809 return -1;
810 }
811 shift = strtol(vnetwork, &end, 10);
812 if (*end != '\0') {
813 if (!inet_aton(vnetwork, &mask)) {
814 return -1;
815 }
816 } else if (shift < 4 || shift > 32) {
817 return -1;
818 } else {
819 mask.s_addr = htonl(0xffffffff << (32 - shift));
820 }
821 }
822 net.s_addr &= mask.s_addr;
823 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
824 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
825 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
826 }
827
828 if (vhost && !inet_aton(vhost, &host)) {
829 return -1;
830 }
831 if ((host.s_addr & mask.s_addr) != net.s_addr) {
832 return -1;
833 }
834
835 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
836 return -1;
837 }
838 if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
839 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
840 return -1;
841 }
842
843 if (vnameserver && !inet_aton(vnameserver, &dns)) {
844 return -1;
845 }
846 if ((dns.s_addr & mask.s_addr) != net.s_addr ||
847 dns.s_addr == host.s_addr) {
848 return -1;
849 }
850
851 #ifndef _WIN32
852 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
853 return -1;
854 }
855 #endif
856
857 s = qemu_mallocz(sizeof(SlirpState));
858 s->slirp = slirp_init(restricted, net, mask, host, vhostname,
859 tftp_export, bootfile, dhcp, dns, s);
860 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
861
862 for (config = slirp_configs; config; config = config->next) {
863 if (config->flags & SLIRP_CFG_HOSTFWD) {
864 if (slirp_hostfwd(s, config->str,
865 config->flags & SLIRP_CFG_LEGACY) < 0)
866 return -1;
867 } else {
868 if (slirp_guestfwd(s, config->str,
869 config->flags & SLIRP_CFG_LEGACY) < 0)
870 return -1;
871 }
872 }
873 #ifndef _WIN32
874 if (!smb_export) {
875 smb_export = legacy_smb_export;
876 }
877 if (smb_export) {
878 if (slirp_smb(s, smb_export, smbsrv) < 0)
879 return -1;
880 }
881 #endif
882
883 s->vc = qemu_new_vlan_client(vlan, NULL, model, name, NULL,
884 slirp_receive, NULL,
885 net_slirp_cleanup, s);
886 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
887 "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
888 return 0;
889 }
890
891 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
892 const char *stack)
893 {
894 VLANClientState *vc;
895
896 if (vlan) {
897 vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
898 if (!vc) {
899 return NULL;
900 }
901 if (strcmp(vc->model, "user")) {
902 monitor_printf(mon, "invalid device specified\n");
903 return NULL;
904 }
905 return vc->opaque;
906 } else {
907 if (QTAILQ_EMPTY(&slirp_stacks)) {
908 monitor_printf(mon, "user mode network stack not in use\n");
909 return NULL;
910 }
911 return QTAILQ_FIRST(&slirp_stacks);
912 }
913 }
914
915 void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict)
916 {
917 struct in_addr host_addr = { .s_addr = INADDR_ANY };
918 int host_port;
919 char buf[256] = "";
920 const char *src_str, *p;
921 SlirpState *s;
922 int is_udp = 0;
923 int err;
924 const char *arg1 = qdict_get_str(qdict, "arg1");
925 const char *arg2 = qdict_get_try_str(qdict, "arg2");
926 const char *arg3 = qdict_get_try_str(qdict, "arg3");
927
928 if (arg2) {
929 s = slirp_lookup(mon, arg1, arg2);
930 src_str = arg3;
931 } else {
932 s = slirp_lookup(mon, NULL, NULL);
933 src_str = arg1;
934 }
935 if (!s) {
936 return;
937 }
938
939 if (!src_str || !src_str[0])
940 goto fail_syntax;
941
942 p = src_str;
943 get_str_sep(buf, sizeof(buf), &p, ':');
944
945 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
946 is_udp = 0;
947 } else if (!strcmp(buf, "udp")) {
948 is_udp = 1;
949 } else {
950 goto fail_syntax;
951 }
952
953 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
954 goto fail_syntax;
955 }
956 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
957 goto fail_syntax;
958 }
959
960 host_port = atoi(p);
961
962 err = slirp_remove_hostfwd(QTAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
963 host_addr, host_port);
964
965 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
966 err ? "removed" : "not found");
967 return;
968
969 fail_syntax:
970 monitor_printf(mon, "invalid format\n");
971 }
972
973 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
974 int legacy_format)
975 {
976 struct in_addr host_addr = { .s_addr = INADDR_ANY };
977 struct in_addr guest_addr = { .s_addr = 0 };
978 int host_port, guest_port;
979 const char *p;
980 char buf[256];
981 int is_udp;
982 char *end;
983
984 p = redir_str;
985 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
986 goto fail_syntax;
987 }
988 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
989 is_udp = 0;
990 } else if (!strcmp(buf, "udp")) {
991 is_udp = 1;
992 } else {
993 goto fail_syntax;
994 }
995
996 if (!legacy_format) {
997 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
998 goto fail_syntax;
999 }
1000 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
1001 goto fail_syntax;
1002 }
1003 }
1004
1005 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
1006 goto fail_syntax;
1007 }
1008 host_port = strtol(buf, &end, 0);
1009 if (*end != '\0' || host_port < 1 || host_port > 65535) {
1010 goto fail_syntax;
1011 }
1012
1013 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1014 goto fail_syntax;
1015 }
1016 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1017 goto fail_syntax;
1018 }
1019
1020 guest_port = strtol(p, &end, 0);
1021 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1022 goto fail_syntax;
1023 }
1024
1025 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1026 guest_port) < 0) {
1027 qemu_error("could not set up host forwarding rule '%s'\n",
1028 redir_str);
1029 return -1;
1030 }
1031 return 0;
1032
1033 fail_syntax:
1034 qemu_error("invalid host forwarding rule '%s'\n", redir_str);
1035 return -1;
1036 }
1037
1038 void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict)
1039 {
1040 const char *redir_str;
1041 SlirpState *s;
1042 const char *arg1 = qdict_get_str(qdict, "arg1");
1043 const char *arg2 = qdict_get_try_str(qdict, "arg2");
1044 const char *arg3 = qdict_get_try_str(qdict, "arg3");
1045
1046 if (arg2) {
1047 s = slirp_lookup(mon, arg1, arg2);
1048 redir_str = arg3;
1049 } else {
1050 s = slirp_lookup(mon, NULL, NULL);
1051 redir_str = arg1;
1052 }
1053 if (s) {
1054 slirp_hostfwd(s, redir_str, 0);
1055 }
1056
1057 }
1058
1059 int net_slirp_redir(const char *redir_str)
1060 {
1061 struct slirp_config_str *config;
1062
1063 if (QTAILQ_EMPTY(&slirp_stacks)) {
1064 config = qemu_malloc(sizeof(*config));
1065 pstrcpy(config->str, sizeof(config->str), redir_str);
1066 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1067 config->next = slirp_configs;
1068 slirp_configs = config;
1069 return 0;
1070 }
1071
1072 return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1);
1073 }
1074
1075 #ifndef _WIN32
1076
1077 /* automatic user mode samba server configuration */
1078 static void slirp_smb_cleanup(SlirpState *s)
1079 {
1080 char cmd[128];
1081
1082 if (s->smb_dir[0] != '\0') {
1083 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1084 system(cmd);
1085 s->smb_dir[0] = '\0';
1086 }
1087 }
1088
1089 static int slirp_smb(SlirpState* s, const char *exported_dir,
1090 struct in_addr vserver_addr)
1091 {
1092 static int instance;
1093 char smb_conf[128];
1094 char smb_cmdline[128];
1095 FILE *f;
1096
1097 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1098 (long)getpid(), instance++);
1099 if (mkdir(s->smb_dir, 0700) < 0) {
1100 qemu_error("could not create samba server dir '%s'\n", s->smb_dir);
1101 return -1;
1102 }
1103 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1104
1105 f = fopen(smb_conf, "w");
1106 if (!f) {
1107 slirp_smb_cleanup(s);
1108 qemu_error("could not create samba server configuration file '%s'\n",
1109 smb_conf);
1110 return -1;
1111 }
1112 fprintf(f,
1113 "[global]\n"
1114 "private dir=%s\n"
1115 "smb ports=0\n"
1116 "socket address=127.0.0.1\n"
1117 "pid directory=%s\n"
1118 "lock directory=%s\n"
1119 "log file=%s/log.smbd\n"
1120 "smb passwd file=%s/smbpasswd\n"
1121 "security = share\n"
1122 "[qemu]\n"
1123 "path=%s\n"
1124 "read only=no\n"
1125 "guest ok=yes\n",
1126 s->smb_dir,
1127 s->smb_dir,
1128 s->smb_dir,
1129 s->smb_dir,
1130 s->smb_dir,
1131 exported_dir
1132 );
1133 fclose(f);
1134
1135 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1136 SMBD_COMMAND, smb_conf);
1137
1138 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) {
1139 slirp_smb_cleanup(s);
1140 qemu_error("conflicting/invalid smbserver address\n");
1141 return -1;
1142 }
1143 return 0;
1144 }
1145
1146 /* automatic user mode samba server configuration (legacy interface) */
1147 int net_slirp_smb(const char *exported_dir)
1148 {
1149 struct in_addr vserver_addr = { .s_addr = 0 };
1150
1151 if (legacy_smb_export) {
1152 fprintf(stderr, "-smb given twice\n");
1153 return -1;
1154 }
1155 legacy_smb_export = exported_dir;
1156 if (!QTAILQ_EMPTY(&slirp_stacks)) {
1157 return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
1158 vserver_addr);
1159 }
1160 return 0;
1161 }
1162
1163 #endif /* !defined(_WIN32) */
1164
1165 struct GuestFwd {
1166 CharDriverState *hd;
1167 struct in_addr server;
1168 int port;
1169 Slirp *slirp;
1170 };
1171
1172 static int guestfwd_can_read(void *opaque)
1173 {
1174 struct GuestFwd *fwd = opaque;
1175 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1176 }
1177
1178 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1179 {
1180 struct GuestFwd *fwd = opaque;
1181 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1182 }
1183
1184 static int slirp_guestfwd(SlirpState *s, const char *config_str,
1185 int legacy_format)
1186 {
1187 struct in_addr server = { .s_addr = 0 };
1188 struct GuestFwd *fwd;
1189 const char *p;
1190 char buf[128];
1191 char *end;
1192 int port;
1193
1194 p = config_str;
1195 if (legacy_format) {
1196 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1197 goto fail_syntax;
1198 }
1199 } else {
1200 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1201 goto fail_syntax;
1202 }
1203 if (strcmp(buf, "tcp") && buf[0] != '\0') {
1204 goto fail_syntax;
1205 }
1206 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1207 goto fail_syntax;
1208 }
1209 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1210 goto fail_syntax;
1211 }
1212 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1213 goto fail_syntax;
1214 }
1215 }
1216 port = strtol(buf, &end, 10);
1217 if (*end != '\0' || port < 1 || port > 65535) {
1218 goto fail_syntax;
1219 }
1220
1221 fwd = qemu_malloc(sizeof(struct GuestFwd));
1222 snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1223 fwd->hd = qemu_chr_open(buf, p, NULL);
1224 if (!fwd->hd) {
1225 qemu_error("could not open guest forwarding device '%s'\n", buf);
1226 qemu_free(fwd);
1227 return -1;
1228 }
1229
1230 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
1231 qemu_error("conflicting/invalid host:port in guest forwarding "
1232 "rule '%s'\n", config_str);
1233 qemu_free(fwd);
1234 return -1;
1235 }
1236 fwd->server = server;
1237 fwd->port = port;
1238 fwd->slirp = s->slirp;
1239
1240 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1241 NULL, fwd);
1242 return 0;
1243
1244 fail_syntax:
1245 qemu_error("invalid guest forwarding rule '%s'\n", config_str);
1246 return -1;
1247 }
1248
1249 void do_info_usernet(Monitor *mon)
1250 {
1251 SlirpState *s;
1252
1253 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
1254 monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1255 slirp_connection_info(s->slirp, mon);
1256 }
1257 }
1258
1259 #endif /* CONFIG_SLIRP */
1260
1261 #if !defined(_WIN32)
1262
1263 typedef struct TAPState {
1264 VLANClientState *vc;
1265 int fd;
1266 char down_script[1024];
1267 char down_script_arg[128];
1268 uint8_t buf[4096];
1269 unsigned int read_poll : 1;
1270 unsigned int write_poll : 1;
1271 } TAPState;
1272
1273 static int launch_script(const char *setup_script, const char *ifname, int fd);
1274
1275 static int tap_can_send(void *opaque);
1276 static void tap_send(void *opaque);
1277 static void tap_writable(void *opaque);
1278
1279 static void tap_update_fd_handler(TAPState *s)
1280 {
1281 qemu_set_fd_handler2(s->fd,
1282 s->read_poll ? tap_can_send : NULL,
1283 s->read_poll ? tap_send : NULL,
1284 s->write_poll ? tap_writable : NULL,
1285 s);
1286 }
1287
1288 static void tap_read_poll(TAPState *s, int enable)
1289 {
1290 s->read_poll = !!enable;
1291 tap_update_fd_handler(s);
1292 }
1293
1294 static void tap_write_poll(TAPState *s, int enable)
1295 {
1296 s->write_poll = !!enable;
1297 tap_update_fd_handler(s);
1298 }
1299
1300 static void tap_writable(void *opaque)
1301 {
1302 TAPState *s = opaque;
1303
1304 tap_write_poll(s, 0);
1305
1306 qemu_flush_queued_packets(s->vc);
1307 }
1308
1309 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1310 int iovcnt)
1311 {
1312 TAPState *s = vc->opaque;
1313 ssize_t len;
1314
1315 do {
1316 len = writev(s->fd, iov, iovcnt);
1317 } while (len == -1 && errno == EINTR);
1318
1319 if (len == -1 && errno == EAGAIN) {
1320 tap_write_poll(s, 1);
1321 return 0;
1322 }
1323
1324 return len;
1325 }
1326
1327 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1328 {
1329 TAPState *s = vc->opaque;
1330 ssize_t len;
1331
1332 do {
1333 len = write(s->fd, buf, size);
1334 } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1335
1336 return len;
1337 }
1338
1339 static int tap_can_send(void *opaque)
1340 {
1341 TAPState *s = opaque;
1342
1343 return qemu_can_send_packet(s->vc);
1344 }
1345
1346 #ifdef __sun__
1347 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1348 {
1349 struct strbuf sbuf;
1350 int f = 0;
1351
1352 sbuf.maxlen = maxlen;
1353 sbuf.buf = (char *)buf;
1354
1355 return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1356 }
1357 #else
1358 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1359 {
1360 return read(tapfd, buf, maxlen);
1361 }
1362 #endif
1363
1364 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1365 {
1366 TAPState *s = vc->opaque;
1367 tap_read_poll(s, 1);
1368 }
1369
1370 static void tap_send(void *opaque)
1371 {
1372 TAPState *s = opaque;
1373 int size;
1374
1375 do {
1376 size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1377 if (size <= 0) {
1378 break;
1379 }
1380
1381 size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1382 if (size == 0) {
1383 tap_read_poll(s, 0);
1384 }
1385 } while (size > 0);
1386 }
1387
1388 #ifdef TUNSETSNDBUF
1389 /* sndbuf should be set to a value lower than the tx queue
1390 * capacity of any destination network interface.
1391 * Ethernet NICs generally have txqueuelen=1000, so 1Mb is
1392 * a good default, given a 1500 byte MTU.
1393 */
1394 #define TAP_DEFAULT_SNDBUF 1024*1024
1395
1396 static int tap_set_sndbuf(TAPState *s, QemuOpts *opts)
1397 {
1398 int sndbuf;
1399
1400 sndbuf = qemu_opt_get_size(opts, "sndbuf", TAP_DEFAULT_SNDBUF);
1401 if (!sndbuf) {
1402 sndbuf = INT_MAX;
1403 }
1404
1405 if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1 && qemu_opt_get(opts, "sndbuf")) {
1406 qemu_error("TUNSETSNDBUF ioctl failed: %s\n", strerror(errno));
1407 return -1;
1408 }
1409 return 0;
1410 }
1411 #else
1412 static int tap_set_sndbuf(TAPState *s, QemuOpts *opts)
1413 {
1414 return 0;
1415 }
1416 #endif /* TUNSETSNDBUF */
1417
1418 static void tap_cleanup(VLANClientState *vc)
1419 {
1420 TAPState *s = vc->opaque;
1421
1422 qemu_purge_queued_packets(vc);
1423
1424 if (s->down_script[0])
1425 launch_script(s->down_script, s->down_script_arg, s->fd);
1426
1427 tap_read_poll(s, 0);
1428 tap_write_poll(s, 0);
1429 close(s->fd);
1430 qemu_free(s);
1431 }
1432
1433 /* fd support */
1434
1435 static TAPState *net_tap_fd_init(VLANState *vlan,
1436 const char *model,
1437 const char *name,
1438 int fd)
1439 {
1440 TAPState *s;
1441
1442 s = qemu_mallocz(sizeof(TAPState));
1443 s->fd = fd;
1444 s->vc = qemu_new_vlan_client(vlan, NULL, model, name, NULL,
1445 tap_receive, tap_receive_iov,
1446 tap_cleanup, s);
1447 tap_read_poll(s, 1);
1448 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1449 return s;
1450 }
1451
1452 #if defined (CONFIG_BSD) || defined (__FreeBSD_kernel__)
1453 static int tap_open(char *ifname, int ifname_size)
1454 {
1455 int fd;
1456 char *dev;
1457 struct stat s;
1458
1459 TFR(fd = open("/dev/tap", O_RDWR));
1460 if (fd < 0) {
1461 fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1462 return -1;
1463 }
1464
1465 fstat(fd, &s);
1466 dev = devname(s.st_rdev, S_IFCHR);
1467 pstrcpy(ifname, ifname_size, dev);
1468
1469 fcntl(fd, F_SETFL, O_NONBLOCK);
1470 return fd;
1471 }
1472 #elif defined(__sun__)
1473 #define TUNNEWPPA (('T'<<16) | 0x0001)
1474 /*
1475 * Allocate TAP device, returns opened fd.
1476 * Stores dev name in the first arg(must be large enough).
1477 */
1478 static int tap_alloc(char *dev, size_t dev_size)
1479 {
1480 int tap_fd, if_fd, ppa = -1;
1481 static int ip_fd = 0;
1482 char *ptr;
1483
1484 static int arp_fd = 0;
1485 int ip_muxid, arp_muxid;
1486 struct strioctl strioc_if, strioc_ppa;
1487 int link_type = I_PLINK;;
1488 struct lifreq ifr;
1489 char actual_name[32] = "";
1490
1491 memset(&ifr, 0x0, sizeof(ifr));
1492
1493 if( *dev ){
1494 ptr = dev;
1495 while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1496 ppa = atoi(ptr);
1497 }
1498
1499 /* Check if IP device was opened */
1500 if( ip_fd )
1501 close(ip_fd);
1502
1503 TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1504 if (ip_fd < 0) {
1505 syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1506 return -1;
1507 }
1508
1509 TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1510 if (tap_fd < 0) {
1511 syslog(LOG_ERR, "Can't open /dev/tap");
1512 return -1;
1513 }
1514
1515 /* Assign a new PPA and get its unit number. */
1516 strioc_ppa.ic_cmd = TUNNEWPPA;
1517 strioc_ppa.ic_timout = 0;
1518 strioc_ppa.ic_len = sizeof(ppa);
1519 strioc_ppa.ic_dp = (char *)&ppa;
1520 if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1521 syslog (LOG_ERR, "Can't assign new interface");
1522
1523 TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1524 if (if_fd < 0) {
1525 syslog(LOG_ERR, "Can't open /dev/tap (2)");
1526 return -1;
1527 }
1528 if(ioctl(if_fd, I_PUSH, "ip") < 0){
1529 syslog(LOG_ERR, "Can't push IP module");
1530 return -1;
1531 }
1532
1533 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1534 syslog(LOG_ERR, "Can't get flags\n");
1535
1536 snprintf (actual_name, 32, "tap%d", ppa);
1537 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1538
1539 ifr.lifr_ppa = ppa;
1540 /* Assign ppa according to the unit number returned by tun device */
1541
1542 if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1543 syslog (LOG_ERR, "Can't set PPA %d", ppa);
1544 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1545 syslog (LOG_ERR, "Can't get flags\n");
1546 /* Push arp module to if_fd */
1547 if (ioctl (if_fd, I_PUSH, "arp") < 0)
1548 syslog (LOG_ERR, "Can't push ARP module (2)");
1549
1550 /* Push arp module to ip_fd */
1551 if (ioctl (ip_fd, I_POP, NULL) < 0)
1552 syslog (LOG_ERR, "I_POP failed\n");
1553 if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1554 syslog (LOG_ERR, "Can't push ARP module (3)\n");
1555 /* Open arp_fd */
1556 TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1557 if (arp_fd < 0)
1558 syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1559
1560 /* Set ifname to arp */
1561 strioc_if.ic_cmd = SIOCSLIFNAME;
1562 strioc_if.ic_timout = 0;
1563 strioc_if.ic_len = sizeof(ifr);
1564 strioc_if.ic_dp = (char *)&ifr;
1565 if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1566 syslog (LOG_ERR, "Can't set ifname to arp\n");
1567 }
1568
1569 if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1570 syslog(LOG_ERR, "Can't link TAP device to IP");
1571 return -1;
1572 }
1573
1574 if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1575 syslog (LOG_ERR, "Can't link TAP device to ARP");
1576
1577 close (if_fd);
1578
1579 memset(&ifr, 0x0, sizeof(ifr));
1580 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1581 ifr.lifr_ip_muxid = ip_muxid;
1582 ifr.lifr_arp_muxid = arp_muxid;
1583
1584 if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1585 {
1586 ioctl (ip_fd, I_PUNLINK , arp_muxid);
1587 ioctl (ip_fd, I_PUNLINK, ip_muxid);
1588 syslog (LOG_ERR, "Can't set multiplexor id");
1589 }
1590
1591 snprintf(dev, dev_size, "tap%d", ppa);
1592 return tap_fd;
1593 }
1594
1595 static int tap_open(char *ifname, int ifname_size)
1596 {
1597 char dev[10]="";
1598 int fd;
1599 if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1600 fprintf(stderr, "Cannot allocate TAP device\n");
1601 return -1;
1602 }
1603 pstrcpy(ifname, ifname_size, dev);
1604 fcntl(fd, F_SETFL, O_NONBLOCK);
1605 return fd;
1606 }
1607 #elif defined (_AIX)
1608 static int tap_open(char *ifname, int ifname_size)
1609 {
1610 fprintf (stderr, "no tap on AIX\n");
1611 return -1;
1612 }
1613 #else
1614 static int tap_open(char *ifname, int ifname_size)
1615 {
1616 struct ifreq ifr;
1617 int fd, ret;
1618
1619 TFR(fd = open("/dev/net/tun", O_RDWR));
1620 if (fd < 0) {
1621 fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1622 return -1;
1623 }
1624 memset(&ifr, 0, sizeof(ifr));
1625 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1626 if (ifname[0] != '\0')
1627 pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1628 else
1629 pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1630 ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1631 if (ret != 0) {
1632 fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1633 close(fd);
1634 return -1;
1635 }
1636 pstrcpy(ifname, ifname_size, ifr.ifr_name);
1637 fcntl(fd, F_SETFL, O_NONBLOCK);
1638 return fd;
1639 }
1640 #endif
1641
1642 static int launch_script(const char *setup_script, const char *ifname, int fd)
1643 {
1644 sigset_t oldmask, mask;
1645 int pid, status;
1646 char *args[3];
1647 char **parg;
1648
1649 sigemptyset(&mask);
1650 sigaddset(&mask, SIGCHLD);
1651 sigprocmask(SIG_BLOCK, &mask, &oldmask);
1652
1653 /* try to launch network script */
1654 pid = fork();
1655 if (pid == 0) {
1656 int open_max = sysconf(_SC_OPEN_MAX), i;
1657
1658 for (i = 0; i < open_max; i++) {
1659 if (i != STDIN_FILENO &&
1660 i != STDOUT_FILENO &&
1661 i != STDERR_FILENO &&
1662 i != fd) {
1663 close(i);
1664 }
1665 }
1666 parg = args;
1667 *parg++ = (char *)setup_script;
1668 *parg++ = (char *)ifname;
1669 *parg++ = NULL;
1670 execv(setup_script, args);
1671 _exit(1);
1672 } else if (pid > 0) {
1673 while (waitpid(pid, &status, 0) != pid) {
1674 /* loop */
1675 }
1676 sigprocmask(SIG_SETMASK, &oldmask, NULL);
1677
1678 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1679 return 0;
1680 }
1681 }
1682 fprintf(stderr, "%s: could not launch network script\n", setup_script);
1683 return -1;
1684 }
1685
1686 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1687 const char *name, const char *ifname1,
1688 const char *setup_script, const char *down_script)
1689 {
1690 TAPState *s;
1691 int fd;
1692 char ifname[128];
1693
1694 if (ifname1 != NULL)
1695 pstrcpy(ifname, sizeof(ifname), ifname1);
1696 else
1697 ifname[0] = '\0';
1698 TFR(fd = tap_open(ifname, sizeof(ifname)));
1699 if (fd < 0)
1700 return NULL;
1701
1702 if (!setup_script || !strcmp(setup_script, "no"))
1703 setup_script = "";
1704 if (setup_script[0] != '\0' &&
1705 launch_script(setup_script, ifname, fd)) {
1706 return NULL;
1707 }
1708 s = net_tap_fd_init(vlan, model, name, fd);
1709 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1710 "ifname=%s,script=%s,downscript=%s",
1711 ifname, setup_script, down_script);
1712 if (down_script && strcmp(down_script, "no")) {
1713 snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1714 snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1715 }
1716 return s;
1717 }
1718
1719 #endif /* !_WIN32 */
1720
1721 #if defined(CONFIG_VDE)
1722 typedef struct VDEState {
1723 VLANClientState *vc;
1724 VDECONN *vde;
1725 } VDEState;
1726
1727 static void vde_to_qemu(void *opaque)
1728 {
1729 VDEState *s = opaque;
1730 uint8_t buf[4096];
1731 int size;
1732
1733 size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1734 if (size > 0) {
1735 qemu_send_packet(s->vc, buf, size);
1736 }
1737 }
1738
1739 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1740 {
1741 VDEState *s = vc->opaque;
1742 ssize_t ret;
1743
1744 do {
1745 ret = vde_send(s->vde, (const char *)buf, size, 0);
1746 } while (ret < 0 && errno == EINTR);
1747
1748 return ret;
1749 }
1750
1751 static void vde_cleanup(VLANClientState *vc)
1752 {
1753 VDEState *s = vc->opaque;
1754 qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1755 vde_close(s->vde);
1756 qemu_free(s);
1757 }
1758
1759 static int net_vde_init(VLANState *vlan, const char *model,
1760 const char *name, const char *sock,
1761 int port, const char *group, int mode)
1762 {
1763 VDEState *s;
1764 char *init_group = (char *)group;
1765 char *init_sock = (char *)sock;
1766
1767 struct vde_open_args args = {
1768 .port = port,
1769 .group = init_group,
1770 .mode = mode,
1771 };
1772
1773 s = qemu_mallocz(sizeof(VDEState));
1774 s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1775 if (!s->vde){
1776 free(s);
1777 return -1;
1778 }
1779 s->vc = qemu_new_vlan_client(vlan, NULL, model, name, NULL,
1780 vde_receive, NULL,
1781 vde_cleanup, s);
1782 qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1783 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1784 sock, vde_datafd(s->vde));
1785 return 0;
1786 }
1787 #endif
1788
1789 /* network connection */
1790 typedef struct NetSocketState {
1791 VLANClientState *vc;
1792 int fd;
1793 int state; /* 0 = getting length, 1 = getting data */
1794 unsigned int index;
1795 unsigned int packet_len;
1796 uint8_t buf[4096];
1797 struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1798 } NetSocketState;
1799
1800 typedef struct NetSocketListenState {
1801 VLANState *vlan;
1802 char *model;
1803 char *name;
1804 int fd;
1805 } NetSocketListenState;
1806
1807 /* XXX: we consider we can send the whole packet without blocking */
1808 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1809 {
1810 NetSocketState *s = vc->opaque;
1811 uint32_t len;
1812 len = htonl(size);
1813
1814 send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1815 return send_all(s->fd, buf, size);
1816 }
1817
1818 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1819 {
1820 NetSocketState *s = vc->opaque;
1821
1822 return sendto(s->fd, (const void *)buf, size, 0,
1823 (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1824 }
1825
1826 static void net_socket_send(void *opaque)
1827 {
1828 NetSocketState *s = opaque;
1829 int size, err;
1830 unsigned l;
1831 uint8_t buf1[4096];
1832 const uint8_t *buf;
1833
1834 size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1835 if (size < 0) {
1836 err = socket_error();
1837 if (err != EWOULDBLOCK)
1838 goto eoc;
1839 } else if (size == 0) {
1840 /* end of connection */
1841 eoc:
1842 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1843 closesocket(s->fd);
1844 return;
1845 }
1846 buf = buf1;
1847 while (size > 0) {
1848 /* reassemble a packet from the network */
1849 switch(s->state) {
1850 case 0:
1851 l = 4 - s->index;
1852 if (l > size)
1853 l = size;
1854 memcpy(s->buf + s->index, buf, l);
1855 buf += l;
1856 size -= l;
1857 s->index += l;
1858 if (s->index == 4) {
1859 /* got length */
1860 s->packet_len = ntohl(*(uint32_t *)s->buf);
1861 s->index = 0;
1862 s->state = 1;
1863 }
1864 break;
1865 case 1:
1866 l = s->packet_len - s->index;
1867 if (l > size)
1868 l = size;
1869 if (s->index + l <= sizeof(s->buf)) {
1870 memcpy(s->buf + s->index, buf, l);
1871 } else {
1872 fprintf(stderr, "serious error: oversized packet received,"
1873 "connection terminated.\n");
1874 s->state = 0;
1875 goto eoc;
1876 }
1877
1878 s->index += l;
1879 buf += l;
1880 size -= l;
1881 if (s->index >= s->packet_len) {
1882 qemu_send_packet(s->vc, s->buf, s->packet_len);
1883 s->index = 0;
1884 s->state = 0;
1885 }
1886 break;
1887 }
1888 }
1889 }
1890
1891 static void net_socket_send_dgram(void *opaque)
1892 {
1893 NetSocketState *s = opaque;
1894 int size;
1895
1896 size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1897 if (size < 0)
1898 return;
1899 if (size == 0) {
1900 /* end of connection */
1901 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1902 return;
1903 }
1904 qemu_send_packet(s->vc, s->buf, size);
1905 }
1906
1907 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1908 {
1909 struct ip_mreq imr;
1910 int fd;
1911 int val, ret;
1912 if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1913 fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1914 inet_ntoa(mcastaddr->sin_addr),
1915 (int)ntohl(mcastaddr->sin_addr.s_addr));
1916 return -1;
1917
1918 }
1919 fd = socket(PF_INET, SOCK_DGRAM, 0);
1920 if (fd < 0) {
1921 perror("socket(PF_INET, SOCK_DGRAM)");
1922 return -1;
1923 }
1924
1925 val = 1;
1926 ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1927 (const char *)&val, sizeof(val));
1928 if (ret < 0) {
1929 perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1930 goto fail;
1931 }
1932
1933 ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1934 if (ret < 0) {
1935 perror("bind");
1936 goto fail;
1937 }
1938
1939 /* Add host to multicast group */
1940 imr.imr_multiaddr = mcastaddr->sin_addr;
1941 imr.imr_interface.s_addr = htonl(INADDR_ANY);
1942
1943 ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1944 (const char *)&imr, sizeof(struct ip_mreq));
1945 if (ret < 0) {
1946 perror("setsockopt(IP_ADD_MEMBERSHIP)");
1947 goto fail;
1948 }
1949
1950 /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1951 val = 1;
1952 ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1953 (const char *)&val, sizeof(val));
1954 if (ret < 0) {
1955 perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1956 goto fail;
1957 }
1958
1959 socket_set_nonblock(fd);
1960 return fd;
1961 fail:
1962 if (fd >= 0)
1963 closesocket(fd);
1964 return -1;
1965 }
1966
1967 static void net_socket_cleanup(VLANClientState *vc)
1968 {
1969 NetSocketState *s = vc->opaque;
1970 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1971 close(s->fd);
1972 qemu_free(s);
1973 }
1974
1975 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1976 const char *model,
1977 const char *name,
1978 int fd, int is_connected)
1979 {
1980 struct sockaddr_in saddr;
1981 int newfd;
1982 socklen_t saddr_len;
1983 NetSocketState *s;
1984
1985 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1986 * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1987 * by ONLY ONE process: we must "clone" this dgram socket --jjo
1988 */
1989
1990 if (is_connected) {
1991 if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1992 /* must be bound */
1993 if (saddr.sin_addr.s_addr==0) {
1994 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1995 fd);
1996 return NULL;
1997 }
1998 /* clone dgram socket */
1999 newfd = net_socket_mcast_create(&saddr);
2000 if (newfd < 0) {
2001 /* error already reported by net_socket_mcast_create() */
2002 close(fd);
2003 return NULL;
2004 }
2005 /* clone newfd to fd, close newfd */
2006 dup2(newfd, fd);
2007 close(newfd);
2008
2009 } else {
2010 fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
2011 fd, strerror(errno));
2012 return NULL;
2013 }
2014 }
2015
2016 s = qemu_mallocz(sizeof(NetSocketState));
2017 s->fd = fd;
2018
2019 s->vc = qemu_new_vlan_client(vlan, NULL, model, name, NULL,
2020 net_socket_receive_dgram, NULL,
2021 net_socket_cleanup, s);
2022 qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
2023
2024 /* mcast: save bound address as dst */
2025 if (is_connected) s->dgram_dst=saddr;
2026
2027 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2028 "socket: fd=%d (%s mcast=%s:%d)",
2029 fd, is_connected? "cloned" : "",
2030 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2031 return s;
2032 }
2033
2034 static void net_socket_connect(void *opaque)
2035 {
2036 NetSocketState *s = opaque;
2037 qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2038 }
2039
2040 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2041 const char *model,
2042 const char *name,
2043 int fd, int is_connected)
2044 {
2045 NetSocketState *s;
2046 s = qemu_mallocz(sizeof(NetSocketState));
2047 s->fd = fd;
2048 s->vc = qemu_new_vlan_client(vlan, NULL, model, name, NULL,
2049 net_socket_receive, NULL,
2050 net_socket_cleanup, s);
2051 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2052 "socket: fd=%d", fd);
2053 if (is_connected) {
2054 net_socket_connect(s);
2055 } else {
2056 qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2057 }
2058 return s;
2059 }
2060
2061 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2062 const char *model, const char *name,
2063 int fd, int is_connected)
2064 {
2065 int so_type = -1, optlen=sizeof(so_type);
2066
2067 if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2068 (socklen_t *)&optlen)< 0) {
2069 fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2070 return NULL;
2071 }
2072 switch(so_type) {
2073 case SOCK_DGRAM:
2074 return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2075 case SOCK_STREAM:
2076 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2077 default:
2078 /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2079 fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2080 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2081 }
2082 return NULL;
2083 }
2084
2085 static void net_socket_accept(void *opaque)
2086 {
2087 NetSocketListenState *s = opaque;
2088 NetSocketState *s1;
2089 struct sockaddr_in saddr;
2090 socklen_t len;
2091 int fd;
2092
2093 for(;;) {
2094 len = sizeof(saddr);
2095 fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2096 if (fd < 0 && errno != EINTR) {
2097 return;
2098 } else if (fd >= 0) {
2099 break;
2100 }
2101 }
2102 s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2103 if (!s1) {
2104 closesocket(fd);
2105 } else {
2106 snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2107 "socket: connection from %s:%d",
2108 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2109 }
2110 }
2111
2112 static int net_socket_listen_init(VLANState *vlan,
2113 const char *model,
2114 const char *name,
2115 const char *host_str)
2116 {
2117 NetSocketListenState *s;
2118 int fd, val, ret;
2119 struct sockaddr_in saddr;
2120
2121 if (parse_host_port(&saddr, host_str) < 0)
2122 return -1;
2123
2124 s = qemu_mallocz(sizeof(NetSocketListenState));
2125
2126 fd = socket(PF_INET, SOCK_STREAM, 0);
2127 if (fd < 0) {
2128 perror("socket");
2129 return -1;
2130 }
2131 socket_set_nonblock(fd);
2132
2133 /* allow fast reuse */
2134 val = 1;
2135 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2136
2137 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2138 if (ret < 0) {
2139 perror("bind");
2140 return -1;
2141 }
2142 ret = listen(fd, 0);
2143 if (ret < 0) {
2144 perror("listen");
2145 return -1;
2146 }
2147 s->vlan = vlan;
2148 s->model = qemu_strdup(model);
2149 s->name = name ? qemu_strdup(name) : NULL;
2150 s->fd = fd;
2151 qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2152 return 0;
2153 }
2154
2155 static int net_socket_connect_init(VLANState *vlan,
2156 const char *model,
2157 const char *name,
2158 const char *host_str)
2159 {
2160 NetSocketState *s;
2161 int fd, connected, ret, err;
2162 struct sockaddr_in saddr;
2163
2164 if (parse_host_port(&saddr, host_str) < 0)
2165 return -1;
2166
2167 fd = socket(PF_INET, SOCK_STREAM, 0);
2168 if (fd < 0) {
2169 perror("socket");
2170 return -1;
2171 }
2172 socket_set_nonblock(fd);
2173
2174 connected = 0;
2175 for(;;) {
2176 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2177 if (ret < 0) {
2178 err = socket_error();
2179 if (err == EINTR || err == EWOULDBLOCK) {
2180 } else if (err == EINPROGRESS) {
2181 break;
2182 #ifdef _WIN32
2183 } else if (err == WSAEALREADY) {
2184 break;
2185 #endif
2186 } else {
2187 perror("connect");
2188 closesocket(fd);
2189 return -1;
2190 }
2191 } else {
2192 connected = 1;
2193 break;
2194 }
2195 }
2196 s = net_socket_fd_init(vlan, model, name, fd, connected);
2197 if (!s)
2198 return -1;
2199 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2200 "socket: connect to %s:%d",
2201 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2202 return 0;
2203 }
2204
2205 static int net_socket_mcast_init(VLANState *vlan,
2206 const char *model,
2207 const char *name,
2208 const char *host_str)
2209 {
2210 NetSocketState *s;
2211 int fd;
2212 struct sockaddr_in saddr;
2213
2214 if (parse_host_port(&saddr, host_str) < 0)
2215 return -1;
2216
2217
2218 fd = net_socket_mcast_create(&saddr);
2219 if (fd < 0)
2220 return -1;
2221
2222 s = net_socket_fd_init(vlan, model, name, fd, 0);
2223 if (!s)
2224 return -1;
2225
2226 s->dgram_dst = saddr;
2227
2228 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2229 "socket: mcast=%s:%d",
2230 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2231 return 0;
2232
2233 }
2234
2235 typedef struct DumpState {
2236 VLANClientState *pcap_vc;
2237 int fd;
2238 int pcap_caplen;
2239 } DumpState;
2240
2241 #define PCAP_MAGIC 0xa1b2c3d4
2242
2243 struct pcap_file_hdr {
2244 uint32_t magic;
2245 uint16_t version_major;
2246 uint16_t version_minor;
2247 int32_t thiszone;
2248 uint32_t sigfigs;
2249 uint32_t snaplen;
2250 uint32_t linktype;
2251 };
2252
2253 struct pcap_sf_pkthdr {
2254 struct {
2255 int32_t tv_sec;
2256 int32_t tv_usec;
2257 } ts;
2258 uint32_t caplen;
2259 uint32_t len;
2260 };
2261
2262 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2263 {
2264 DumpState *s = vc->opaque;
2265 struct pcap_sf_pkthdr hdr;
2266 int64_t ts;
2267 int caplen;
2268
2269 /* Early return in case of previous error. */
2270 if (s->fd < 0) {
2271 return size;
2272 }
2273
2274 ts = muldiv64(qemu_get_clock(vm_clock), 1000000, get_ticks_per_sec());
2275 caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2276
2277 hdr.ts.tv_sec = ts / 1000000;
2278 hdr.ts.tv_usec = ts % 1000000;
2279 hdr.caplen = caplen;
2280 hdr.len = size;
2281 if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2282 write(s->fd, buf, caplen) != caplen) {
2283 qemu_log("-net dump write error - stop dump\n");
2284 close(s->fd);
2285 s->fd = -1;
2286 }
2287
2288 return size;
2289 }
2290
2291 static void net_dump_cleanup(VLANClientState *vc)
2292 {
2293 DumpState *s = vc->opaque;
2294
2295 close(s->fd);
2296 qemu_free(s);
2297 }
2298
2299 static int net_dump_init(VLANState *vlan, const char *device,
2300 const char *name, const char *filename, int len)
2301 {
2302 struct pcap_file_hdr hdr;
2303 DumpState *s;
2304
2305 s = qemu_malloc(sizeof(DumpState));
2306
2307 s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2308 if (s->fd < 0) {
2309 qemu_error("-net dump: can't open %s\n", filename);
2310 return -1;
2311 }
2312
2313 s->pcap_caplen = len;
2314
2315 hdr.magic = PCAP_MAGIC;
2316 hdr.version_major = 2;
2317 hdr.version_minor = 4;
2318 hdr.thiszone = 0;
2319 hdr.sigfigs = 0;
2320 hdr.snaplen = s->pcap_caplen;
2321 hdr.linktype = 1;
2322
2323 if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2324 qemu_error("-net dump write error: %s\n", strerror(errno));
2325 close(s->fd);
2326 qemu_free(s);
2327 return -1;
2328 }
2329
2330 s->pcap_vc = qemu_new_vlan_client(vlan, NULL, device, name, NULL,
2331 dump_receive, NULL,
2332 net_dump_cleanup, s);
2333 snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2334 "dump to %s (len=%d)", filename, len);
2335 return 0;
2336 }
2337
2338 /* find or alloc a new VLAN */
2339 VLANState *qemu_find_vlan(int id, int allocate)
2340 {
2341 VLANState *vlan;
2342
2343 QTAILQ_FOREACH(vlan, &vlans, next) {
2344 if (vlan->id == id) {
2345 return vlan;
2346 }
2347 }
2348
2349 if (!allocate) {
2350 return NULL;
2351 }
2352
2353 vlan = qemu_mallocz(sizeof(VLANState));
2354 vlan->id = id;
2355 QTAILQ_INIT(&vlan->clients);
2356
2357 vlan->send_queue = qemu_new_net_queue(qemu_vlan_deliver_packet,
2358 qemu_vlan_deliver_packet_iov,
2359 vlan);
2360
2361 QTAILQ_INSERT_TAIL(&vlans, vlan, next);
2362
2363 return vlan;
2364 }
2365
2366 VLANClientState *qemu_find_netdev(const char *id)
2367 {
2368 VLANClientState *vc;
2369
2370 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
2371 if (!strcmp(vc->name, id)) {
2372 return vc;
2373 }
2374 }
2375
2376 return NULL;
2377 }
2378
2379 static int nic_get_free_idx(void)
2380 {
2381 int index;
2382
2383 for (index = 0; index < MAX_NICS; index++)
2384 if (!nd_table[index].used)
2385 return index;
2386 return -1;
2387 }
2388
2389 int qemu_show_nic_models(const char *arg, const char *const *models)
2390 {
2391 int i;
2392
2393 if (!arg || strcmp(arg, "?"))
2394 return 0;
2395
2396 fprintf(stderr, "qemu: Supported NIC models: ");
2397 for (i = 0 ; models[i]; i++)
2398 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2399 return 1;
2400 }
2401
2402 void qemu_check_nic_model(NICInfo *nd, const char *model)
2403 {
2404 const char *models[2];
2405
2406 models[0] = model;
2407 models[1] = NULL;
2408
2409 if (qemu_show_nic_models(nd->model, models))
2410 exit(0);
2411 if (qemu_find_nic_model(nd, models, model) < 0)
2412 exit(1);
2413 }
2414
2415 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
2416 const char *default_model)
2417 {
2418 int i;
2419
2420 if (!nd->model)
2421 nd->model = qemu_strdup(default_model);
2422
2423 for (i = 0 ; models[i]; i++) {
2424 if (strcmp(nd->model, models[i]) == 0)
2425 return i;
2426 }
2427
2428 qemu_error("qemu: Unsupported NIC model: %s\n", nd->model);
2429 return -1;
2430 }
2431
2432 static int net_handle_fd_param(Monitor *mon, const char *param)
2433 {
2434 if (!qemu_isdigit(param[0])) {
2435 int fd;
2436
2437 fd = monitor_get_fd(mon, param);
2438 if (fd == -1) {
2439 qemu_error("No file descriptor named %s found", param);
2440 return -1;
2441 }
2442
2443 return fd;
2444 } else {
2445 return strtol(param, NULL, 0);
2446 }
2447 }
2448
2449 static int net_init_nic(QemuOpts *opts,
2450 Monitor *mon,
2451 const char *name,
2452 VLANState *vlan)
2453 {
2454 int idx;
2455 NICInfo *nd;
2456 const char *netdev;
2457
2458 idx = nic_get_free_idx();
2459 if (idx == -1 || nb_nics >= MAX_NICS) {
2460 qemu_error("Too Many NICs\n");
2461 return -1;
2462 }
2463
2464 nd = &nd_table[idx];
2465
2466 memset(nd, 0, sizeof(*nd));
2467
2468 if ((netdev = qemu_opt_get(opts, "netdev"))) {
2469 nd->netdev = qemu_find_netdev(netdev);
2470 if (!nd->netdev) {
2471 qemu_error("netdev '%s' not found\n", netdev);
2472 return -1;
2473 }
2474 } else {
2475 assert(vlan);
2476 nd->vlan = vlan;
2477 }
2478 if (name) {
2479 nd->name = qemu_strdup(name);
2480 }
2481 if (qemu_opt_get(opts, "model")) {
2482 nd->model = qemu_strdup(qemu_opt_get(opts, "model"));
2483 }
2484 if (qemu_opt_get(opts, "addr")) {
2485 nd->devaddr = qemu_strdup(qemu_opt_get(opts, "addr"));
2486 }
2487
2488 nd->macaddr[0] = 0x52;
2489 nd->macaddr[1] = 0x54;
2490 nd->macaddr[2] = 0x00;
2491 nd->macaddr[3] = 0x12;
2492 nd->macaddr[4] = 0x34;
2493 nd->macaddr[5] = 0x56 + idx;
2494
2495 if (qemu_opt_get(opts, "macaddr") &&
2496 parse_macaddr(nd->macaddr, qemu_opt_get(opts, "macaddr")) < 0) {
2497 qemu_error("invalid syntax for ethernet address\n");
2498 return -1;
2499 }
2500
2501 nd->nvectors = qemu_opt_get_number(opts, "vectors", NIC_NVECTORS_UNSPECIFIED);
2502 if (nd->nvectors != NIC_NVECTORS_UNSPECIFIED &&
2503 (nd->nvectors < 0 || nd->nvectors > 0x7ffffff)) {
2504 qemu_error("invalid # of vectors: %d\n", nd->nvectors);
2505 return -1;
2506 }
2507
2508 nd->used = 1;
2509 if (vlan) {
2510 nd->vlan->nb_guest_devs++;
2511 }
2512 nb_nics++;
2513
2514 return idx;
2515 }
2516
2517 #if defined(CONFIG_SLIRP)
2518 static int net_init_slirp_configs(const char *name, const char *value, void *opaque)
2519 {
2520 struct slirp_config_str *config;
2521
2522 if (strcmp(name, "hostfwd") != 0 && strcmp(name, "guestfwd") != 0) {
2523 return 0;
2524 }
2525
2526 config = qemu_mallocz(sizeof(*config));
2527
2528 pstrcpy(config->str, sizeof(config->str), value);
2529
2530 if (!strcmp(name, "hostfwd")) {
2531 config->flags = SLIRP_CFG_HOSTFWD;
2532 }
2533
2534 config->next = slirp_configs;
2535 slirp_configs = config;
2536
2537 return 0;
2538 }
2539
2540 static int net_init_slirp(QemuOpts *opts,
2541 Monitor *mon,
2542 const char *name,
2543 VLANState *vlan)
2544 {
2545 struct slirp_config_str *config;
2546 const char *vhost;
2547 const char *vhostname;
2548 const char *vdhcp_start;
2549 const char *vnamesrv;
2550 const char *tftp_export;
2551 const char *bootfile;
2552 const char *smb_export;
2553 const char *vsmbsrv;
2554 char *vnet = NULL;
2555 int restricted = 0;
2556 int ret;
2557
2558 vhost = qemu_opt_get(opts, "host");
2559 vhostname = qemu_opt_get(opts, "hostname");
2560 vdhcp_start = qemu_opt_get(opts, "dhcpstart");
2561 vnamesrv = qemu_opt_get(opts, "dns");
2562 tftp_export = qemu_opt_get(opts, "tftp");
2563 bootfile = qemu_opt_get(opts, "bootfile");
2564 smb_export = qemu_opt_get(opts, "smb");
2565 vsmbsrv = qemu_opt_get(opts, "smbserver");
2566
2567 if (qemu_opt_get(opts, "ip")) {
2568 const char *ip = qemu_opt_get(opts, "ip");
2569 int l = strlen(ip) + strlen("/24") + 1;
2570
2571 vnet = qemu_malloc(l);
2572
2573 /* emulate legacy ip= parameter */
2574 pstrcpy(vnet, l, ip);
2575 pstrcat(vnet, l, "/24");
2576 }
2577
2578 if (qemu_opt_get(opts, "net")) {
2579 if (vnet) {
2580 qemu_free(vnet);
2581 }
2582 vnet = qemu_strdup(qemu_opt_get(opts, "net"));
2583 }
2584
2585 if (qemu_opt_get(opts, "restrict") &&
2586 qemu_opt_get(opts, "restrict")[0] == 'y') {
2587 restricted = 1;
2588 }
2589
2590 qemu_opt_foreach(opts, net_init_slirp_configs, NULL, 0);
2591
2592 ret = net_slirp_init(vlan, "user", name, restricted, vnet, vhost,
2593 vhostname, tftp_export, bootfile, vdhcp_start,
2594 vnamesrv, smb_export, vsmbsrv);
2595
2596 while (slirp_configs) {
2597 config = slirp_configs;
2598 slirp_configs = config->next;
2599 qemu_free(config);
2600 }
2601
2602 if (ret != -1 && vlan) {
2603 vlan->nb_host_devs++;
2604 }
2605
2606 qemu_free(vnet);
2607
2608 return ret;
2609 }
2610 #endif /* CONFIG_SLIRP */
2611
2612 #ifdef _WIN32
2613 static int net_init_tap_win32(QemuOpts *opts,
2614 Monitor *mon,
2615 const char *name,
2616 VLANState *vlan)
2617 {
2618 const char *ifname;
2619
2620 ifname = qemu_opt_get(opts, "ifname");
2621
2622 if (!ifname) {
2623 qemu_error("tap: no interface name\n");
2624 return -1;
2625 }
2626
2627 if (tap_win32_init(vlan, "tap", name, ifname) == -1) {
2628 return -1;
2629 }
2630
2631 if (vlan) {
2632 vlan->nb_host_devs++;
2633 }
2634
2635 return 0;
2636 }
2637 #elif !defined(_AIX)
2638 static int net_init_tap(QemuOpts *opts,
2639 Monitor *mon,
2640 const char *name,
2641 VLANState *vlan)
2642 {
2643 TAPState *s;
2644
2645 if (qemu_opt_get(opts, "fd")) {
2646 int fd;
2647
2648 if (qemu_opt_get(opts, "ifname") ||
2649 qemu_opt_get(opts, "script") ||
2650 qemu_opt_get(opts, "downscript")) {
2651 qemu_error("ifname=, script= and downscript= is invalid with fd=\n");
2652 return -1;
2653 }
2654
2655 fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
2656 if (fd == -1) {
2657 return -1;
2658 }
2659
2660 fcntl(fd, F_SETFL, O_NONBLOCK);
2661
2662 s = net_tap_fd_init(vlan, "tap", name, fd);
2663 if (!s) {
2664 close(fd);
2665 }
2666 } else {
2667 const char *ifname, *script, *downscript;
2668
2669 ifname = qemu_opt_get(opts, "ifname");
2670 script = qemu_opt_get(opts, "script");
2671 downscript = qemu_opt_get(opts, "downscript");
2672
2673 if (!script) {
2674 script = DEFAULT_NETWORK_SCRIPT;
2675 }
2676 if (!downscript) {
2677 downscript = DEFAULT_NETWORK_DOWN_SCRIPT;
2678 }
2679
2680 s = net_tap_init(vlan, "tap", name, ifname, script, downscript);
2681 }
2682
2683 if (!s) {
2684 return -1;
2685 }
2686
2687 if (tap_set_sndbuf(s, opts) < 0) {
2688 return -1;
2689 }
2690
2691 if (vlan) {
2692 vlan->nb_host_devs++;
2693 }
2694
2695 return 0;
2696 }
2697 #endif
2698
2699 static int net_init_socket(QemuOpts *opts,
2700 Monitor *mon,
2701 const char *name,
2702 VLANState *vlan)
2703 {
2704 if (qemu_opt_get(opts, "fd")) {
2705 int fd;
2706
2707 if (qemu_opt_get(opts, "listen") ||
2708 qemu_opt_get(opts, "connect") ||
2709 qemu_opt_get(opts, "mcast")) {
2710 qemu_error("listen=, connect= and mcast= is invalid with fd=\n");
2711 return -1;
2712 }
2713
2714 fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
2715 if (fd == -1) {
2716 return -1;
2717 }
2718
2719 if (!net_socket_fd_init(vlan, "socket", name, fd, 1)) {
2720 close(fd);
2721 return -1;
2722 }
2723 } else if (qemu_opt_get(opts, "listen")) {
2724 const char *listen;
2725
2726 if (qemu_opt_get(opts, "fd") ||
2727 qemu_opt_get(opts, "connect") ||
2728 qemu_opt_get(opts, "mcast")) {
2729 qemu_error("fd=, connect= and mcast= is invalid with listen=\n");
2730 return -1;
2731 }
2732
2733 listen = qemu_opt_get(opts, "listen");
2734
2735 if (net_socket_listen_init(vlan, "socket", name, listen) == -1) {
2736 return -1;
2737 }
2738 } else if (qemu_opt_get(opts, "connect")) {
2739 const char *connect;
2740
2741 if (qemu_opt_get(opts, "fd") ||
2742 qemu_opt_get(opts, "listen") ||
2743 qemu_opt_get(opts, "mcast")) {
2744 qemu_error("fd=, listen= and mcast= is invalid with connect=\n");
2745 return -1;
2746 }
2747
2748 connect = qemu_opt_get(opts, "connect");
2749
2750 if (net_socket_connect_init(vlan, "socket", name, connect) == -1) {
2751 return -1;
2752 }
2753 } else if (qemu_opt_get(opts, "mcast")) {
2754 const char *mcast;
2755
2756 if (qemu_opt_get(opts, "fd") ||
2757 qemu_opt_get(opts, "connect") ||
2758 qemu_opt_get(opts, "listen")) {
2759 qemu_error("fd=, connect= and listen= is invalid with mcast=\n");
2760 return -1;
2761 }
2762
2763 mcast = qemu_opt_get(opts, "mcast");
2764
2765 if (net_socket_mcast_init(vlan, "socket", name, mcast) == -1) {
2766 return -1;
2767 }
2768 } else {
2769 qemu_error("-socket requires fd=, listen=, connect= or mcast=\n");
2770 return -1;
2771 }
2772
2773 if (vlan) {
2774 vlan->nb_host_devs++;
2775 }
2776
2777 return 0;
2778 }
2779
2780 #ifdef CONFIG_VDE
2781 static int net_init_vde(QemuOpts *opts,
2782 Monitor *mon,
2783 const char *name,
2784 VLANState *vlan)
2785 {
2786 const char *sock;
2787 const char *group;
2788 int port, mode;
2789
2790 sock = qemu_opt_get(opts, "sock");
2791 group = qemu_opt_get(opts, "group");
2792
2793 port = qemu_opt_get_number(opts, "port", 0);
2794 mode = qemu_opt_get_number(opts, "mode", 0700);
2795
2796 if (net_vde_init(vlan, "vde", name, sock, port, group, mode) == -1) {
2797 return -1;
2798 }
2799
2800 if (vlan) {
2801 vlan->nb_host_devs++;
2802 }
2803
2804 return 0;
2805 }
2806 #endif
2807
2808 static int net_init_dump(QemuOpts *opts,
2809 Monitor *mon,
2810 const char *name,
2811 VLANState *vlan)
2812 {
2813 int len;
2814 const char *file;
2815 char def_file[128];
2816
2817 assert(vlan);
2818
2819 file = qemu_opt_get(opts, "file");
2820 if (!file) {
2821 snprintf(def_file, sizeof(def_file), "qemu-vlan%d.pcap", vlan->id);
2822 file = def_file;
2823 }
2824
2825 len = qemu_opt_get_size(opts, "len", 65536);
2826
2827 return net_dump_init(vlan, "dump", name, file, len);
2828 }
2829
2830 #define NET_COMMON_PARAMS_DESC \
2831 { \
2832 .name = "type", \
2833 .type = QEMU_OPT_STRING, \
2834 .help = "net client type (nic, tap etc.)", \
2835 }, { \
2836 .name = "vlan", \
2837 .type = QEMU_OPT_NUMBER, \
2838 .help = "vlan number", \
2839 }, { \
2840 .name = "name", \
2841 .type = QEMU_OPT_STRING, \
2842 .help = "identifier for monitor commands", \
2843 }
2844
2845 typedef int (*net_client_init_func)(QemuOpts *opts,
2846 Monitor *mon,
2847 const char *name,
2848 VLANState *vlan);
2849
2850 /* magic number, but compiler will warn if too small */
2851 #define NET_MAX_DESC 20
2852
2853 static struct {
2854 const char *type;
2855 net_client_init_func init;
2856 QemuOptDesc desc[NET_MAX_DESC];
2857 } net_client_types[] = {
2858 {
2859 .type = "none",
2860 .desc = {
2861 NET_COMMON_PARAMS_DESC,
2862 { /* end of list */ }
2863 },
2864 }, {
2865 .type = "nic",
2866 .init = net_init_nic,
2867 .desc = {
2868 NET_COMMON_PARAMS_DESC,
2869 {
2870 .name = "netdev",
2871 .type = QEMU_OPT_STRING,
2872 .help = "id of -netdev to connect to",
2873 },
2874 {
2875 .name = "macaddr",
2876 .type = QEMU_OPT_STRING,
2877 .help = "MAC address",
2878 }, {
2879 .name = "model",
2880 .type = QEMU_OPT_STRING,
2881 .help = "device model (e1000, rtl8139, virtio etc.)",
2882 }, {
2883 .name = "addr",
2884 .type = QEMU_OPT_STRING,
2885 .help = "PCI device address",
2886 }, {
2887 .name = "vectors",
2888 .type = QEMU_OPT_NUMBER,
2889 .help = "number of MSI-x vectors, 0 to disable MSI-X",
2890 },
2891 { /* end of list */ }
2892 },
2893 #ifdef CONFIG_SLIRP
2894 }, {
2895 .type = "user",
2896 .init = net_init_slirp,
2897 .desc = {
2898 NET_COMMON_PARAMS_DESC,
2899 {
2900 .name = "hostname",
2901 .type = QEMU_OPT_STRING,
2902 .help = "client hostname reported by the builtin DHCP server",
2903 }, {
2904 .name = "restrict",
2905 .type = QEMU_OPT_STRING,
2906 .help = "isolate the guest from the host (y|yes|n|no)",
2907 }, {
2908 .name = "ip",
2909 .type = QEMU_OPT_STRING,
2910 .help = "legacy parameter, use net= instead",
2911 }, {
2912 .name = "net",
2913 .type = QEMU_OPT_STRING,
2914 .help = "IP address and optional netmask",
2915 }, {
2916 .name = "host",
2917 .type = QEMU_OPT_STRING,
2918 .help = "guest-visible address of the host",
2919 }, {
2920 .name = "tftp",
2921 .type = QEMU_OPT_STRING,
2922 .help = "root directory of the built-in TFTP server",
2923 }, {
2924 .name = "bootfile",
2925 .type = QEMU_OPT_STRING,
2926 .help = "BOOTP filename, for use with tftp=",
2927 }, {
2928 .name = "dhcpstart",
2929 .type = QEMU_OPT_STRING,
2930 .help = "the first of the 16 IPs the built-in DHCP server can assign",
2931 }, {
2932 .name = "dns",
2933 .type = QEMU_OPT_STRING,
2934 .help = "guest-visible address of the virtual nameserver",
2935 }, {
2936 .name = "smb",
2937 .type = QEMU_OPT_STRING,
2938 .help = "root directory of the built-in SMB server",
2939 }, {
2940 .name = "smbserver",
2941 .type = QEMU_OPT_STRING,
2942 .help = "IP address of the built-in SMB server",
2943 }, {
2944 .name = "hostfwd",
2945 .type = QEMU_OPT_STRING,
2946 .help = "guest port number to forward incoming TCP or UDP connections",
2947 }, {
2948 .name = "guestfwd",
2949 .type = QEMU_OPT_STRING,
2950 .help = "IP address and port to forward guest TCP connections",
2951 },
2952 { /* end of list */ }
2953 },
2954 #endif
2955 #ifdef _WIN32
2956 }, {
2957 .type = "tap",
2958 .init = net_init_tap_win32,
2959 .desc = {
2960 NET_COMMON_PARAMS_DESC,
2961 {
2962 .name = "ifname",
2963 .type = QEMU_OPT_STRING,
2964 .help = "interface name",
2965 },
2966 { /* end of list */ }
2967 },
2968 #elif !defined(_AIX)
2969 }, {
2970 .type = "tap",
2971 .init = net_init_tap,
2972 .desc = {
2973 NET_COMMON_PARAMS_DESC,
2974 {
2975 .name = "fd",
2976 .type = QEMU_OPT_STRING,
2977 .help = "file descriptor of an already opened tap",
2978 }, {
2979 .name = "ifname",
2980 .type = QEMU_OPT_STRING,
2981 .help = "interface name",
2982 }, {
2983 .name = "script",
2984 .type = QEMU_OPT_STRING,
2985 .help = "script to initialize the interface",
2986 }, {
2987 .name = "downscript",
2988 .type = QEMU_OPT_STRING,
2989 .help = "script to shut down the interface",
2990 #ifdef TUNSETSNDBUF
2991 }, {
2992 .name = "sndbuf",
2993 .type = QEMU_OPT_SIZE,
2994 .help = "send buffer limit"
2995 #endif
2996 },
2997 { /* end of list */ }
2998 },
2999 #endif
3000 }, {
3001 .type = "socket",
3002 .init = net_init_socket,
3003 .desc = {
3004 NET_COMMON_PARAMS_DESC,
3005 {
3006 .name = "fd",
3007 .type = QEMU_OPT_STRING,
3008 .help = "file descriptor of an already opened socket",
3009 }, {
3010 .name = "listen",
3011 .type = QEMU_OPT_STRING,
3012 .help = "port number, and optional hostname, to listen on",
3013 }, {
3014 .name = "connect",
3015 .type = QEMU_OPT_STRING,
3016 .help = "port number, and optional hostname, to connect to",
3017 }, {
3018 .name = "mcast",
3019 .type = QEMU_OPT_STRING,
3020 .help = "UDP multicast address and port number",
3021 },
3022 { /* end of list */ }
3023 },
3024 #ifdef CONFIG_VDE
3025 }, {
3026 .type = "vde",
3027 .init = net_init_vde,
3028 .desc = {
3029 NET_COMMON_PARAMS_DESC,
3030 {
3031 .name = "sock",
3032 .type = QEMU_OPT_STRING,
3033 .help = "socket path",
3034 }, {
3035 .name = "port",
3036 .type = QEMU_OPT_NUMBER,
3037 .help = "port number",
3038 }, {
3039 .name = "group",
3040 .type = QEMU_OPT_STRING,
3041 .help = "group owner of socket",
3042 }, {
3043 .name = "mode",
3044 .type = QEMU_OPT_NUMBER,
3045 .help = "permissions for socket",
3046 },
3047 { /* end of list */ }
3048 },
3049 #endif
3050 }, {
3051 .type = "dump",
3052 .init = net_init_dump,
3053 .desc = {
3054 NET_COMMON_PARAMS_DESC,
3055 {
3056 .name = "len",
3057 .type = QEMU_OPT_SIZE,
3058 .help = "per-packet size limit (64k default)",
3059 }, {
3060 .name = "file",
3061 .type = QEMU_OPT_STRING,
3062 .help = "dump file path (default is qemu-vlan0.pcap)",
3063 },
3064 { /* end of list */ }
3065 },
3066 },
3067 { /* end of list */ }
3068 };
3069
3070 int net_client_init(Monitor *mon, QemuOpts *opts, int is_netdev)
3071 {
3072 const char *name;
3073 const char *type;
3074 int i;
3075
3076 type = qemu_opt_get(opts, "type");
3077 if (!type) {
3078 qemu_error("No type specified for -net\n");
3079 return -1;
3080 }
3081
3082 if (is_netdev) {
3083 if (strcmp(type, "tap") != 0 &&
3084 #ifdef CONFIG_SLIRP
3085 strcmp(type, "user") != 0 &&
3086 #endif
3087 #ifdef CONFIG_VDE
3088 strcmp(type, "vde") != 0 &&
3089 #endif
3090 strcmp(type, "socket") != 0) {
3091 qemu_error("The '%s' network backend type is not valid with -netdev\n",
3092 type);
3093 return -1;
3094 }
3095
3096 if (qemu_opt_get(opts, "vlan")) {
3097 qemu_error("The 'vlan' parameter is not valid with -netdev\n");
3098 return -1;
3099 }
3100 if (qemu_opt_get(opts, "name")) {
3101 qemu_error("The 'name' parameter is not valid with -netdev\n");
3102 return -1;
3103 }
3104 if (!qemu_opts_id(opts)) {
3105 qemu_error("The id= parameter is required with -netdev\n");
3106 return -1;
3107 }
3108 }
3109
3110 name = qemu_opts_id(opts);
3111 if (!name) {
3112 name = qemu_opt_get(opts, "name");
3113 }
3114
3115 for (i = 0; net_client_types[i].type != NULL; i++) {
3116 if (!strcmp(net_client_types[i].type, type)) {
3117 VLANState *vlan = NULL;
3118
3119 if (qemu_opts_validate(opts, &net_client_types[i].desc[0]) == -1) {
3120 return -1;
3121 }
3122
3123 /* Do not add to a vlan if it's a -netdev or a nic with a
3124 * netdev= parameter. */
3125 if (!(is_netdev ||
3126 (strcmp(type, "nic") == 0 && qemu_opt_get(opts, "netdev")))) {
3127 vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
3128 }
3129
3130 if (net_client_types[i].init) {
3131 return net_client_types[i].init(opts, mon, name, vlan);
3132 } else {
3133 return 0;
3134 }
3135 }
3136 }
3137
3138 qemu_error("Invalid -net type '%s'\n", type);
3139 return -1;
3140 }
3141
3142 void net_client_uninit(NICInfo *nd)
3143 {
3144 if (nd->vlan) {
3145 nd->vlan->nb_guest_devs--;
3146 }
3147 nb_nics--;
3148
3149 qemu_free(nd->model);
3150 qemu_free(nd->name);
3151 qemu_free(nd->devaddr);
3152
3153 nd->used = 0;
3154 }
3155
3156 static int net_host_check_device(const char *device)
3157 {
3158 int i;
3159 const char *valid_param_list[] = { "tap", "socket", "dump"
3160 #ifdef CONFIG_SLIRP
3161 ,"user"
3162 #endif
3163 #ifdef CONFIG_VDE
3164 ,"vde"
3165 #endif
3166 };
3167 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
3168 if (!strncmp(valid_param_list[i], device,
3169 strlen(valid_param_list[i])))
3170 return 1;
3171 }
3172
3173 return 0;
3174 }
3175
3176 void net_host_device_add(Monitor *mon, const QDict *qdict)
3177 {
3178 const char *device = qdict_get_str(qdict, "device");
3179 const char *opts_str = qdict_get_try_str(qdict, "opts");
3180 QemuOpts *opts;
3181
3182 if (!net_host_check_device(device)) {
3183 monitor_printf(mon, "invalid host network device %s\n", device);
3184 return;
3185 }
3186
3187 opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", NULL);
3188 if (!opts) {
3189 monitor_printf(mon, "parsing network options '%s' failed\n",
3190 opts_str ? opts_str : "");
3191 return;
3192 }
3193
3194 qemu_opt_set(opts, "type", device);
3195
3196 if (net_client_init(mon, opts, 0) < 0) {
3197 monitor_printf(mon, "adding host network device %s failed\n", device);
3198 }
3199 }
3200
3201 void net_host_device_remove(Monitor *mon, const QDict *qdict)
3202 {
3203 VLANClientState *vc;
3204 int vlan_id = qdict_get_int(qdict, "vlan_id");
3205 const char *device = qdict_get_str(qdict, "device");
3206
3207 vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
3208 if (!vc) {
3209 return;
3210 }
3211 if (!net_host_check_device(vc->model)) {
3212 monitor_printf(mon, "invalid host network device %s\n", device);
3213 return;
3214 }
3215 qemu_del_vlan_client(vc);
3216 }
3217
3218 void net_set_boot_mask(int net_boot_mask)
3219 {
3220 int i;
3221
3222 /* Only the first four NICs may be bootable */
3223 net_boot_mask = net_boot_mask & 0xF;
3224
3225 for (i = 0; i < nb_nics; i++) {
3226 if (net_boot_mask & (1 << i)) {
3227 nd_table[i].bootable = 1;
3228 net_boot_mask &= ~(1 << i);
3229 }
3230 }
3231
3232 if (net_boot_mask) {
3233 fprintf(stderr, "Cannot boot from non-existent NIC\n");
3234 exit(1);
3235 }
3236 }
3237
3238 void do_info_network(Monitor *mon)
3239 {
3240 VLANState *vlan;
3241
3242 QTAILQ_FOREACH(vlan, &vlans, next) {
3243 VLANClientState *vc;
3244
3245 monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
3246
3247 QTAILQ_FOREACH(vc, &vlan->clients, next) {
3248 monitor_printf(mon, " %s: %s\n", vc->name, vc->info_str);
3249 }
3250 }
3251 }
3252
3253 void do_set_link(Monitor *mon, const QDict *qdict)
3254 {
3255 VLANState *vlan;
3256 VLANClientState *vc = NULL;
3257 const char *name = qdict_get_str(qdict, "name");
3258 const char *up_or_down = qdict_get_str(qdict, "up_or_down");
3259
3260 QTAILQ_FOREACH(vlan, &vlans, next) {
3261 QTAILQ_FOREACH(vc, &vlan->clients, next) {
3262 if (strcmp(vc->name, name) == 0) {
3263 goto done;
3264 }
3265 }
3266 }
3267 done:
3268
3269 if (!vc) {
3270 monitor_printf(mon, "could not find network device '%s'\n", name);
3271 return;
3272 }
3273
3274 if (strcmp(up_or_down, "up") == 0)
3275 vc->link_down = 0;
3276 else if (strcmp(up_or_down, "down") == 0)
3277 vc->link_down = 1;
3278 else
3279 monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
3280 "valid\n", up_or_down);
3281
3282 if (vc->link_status_changed)
3283 vc->link_status_changed(vc);
3284 }
3285
3286 void net_cleanup(void)
3287 {
3288 VLANState *vlan;
3289 VLANClientState *vc, *next_vc;
3290
3291 QTAILQ_FOREACH(vlan, &vlans, next) {
3292 QTAILQ_FOREACH_SAFE(vc, &vlan->clients, next, next_vc) {
3293 qemu_del_vlan_client(vc);
3294 }
3295 }
3296
3297 QTAILQ_FOREACH_SAFE(vc, &non_vlan_clients, next, next_vc) {
3298 qemu_del_vlan_client(vc);
3299 }
3300 }
3301
3302 static void net_check_clients(void)
3303 {
3304 VLANState *vlan;
3305
3306 QTAILQ_FOREACH(vlan, &vlans, next) {
3307 if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
3308 continue;
3309 if (vlan->nb_guest_devs == 0)
3310 fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
3311 if (vlan->nb_host_devs == 0)
3312 fprintf(stderr,
3313 "Warning: vlan %d is not connected to host network\n",
3314 vlan->id);
3315 }
3316 }
3317
3318 static int net_init_client(QemuOpts *opts, void *dummy)
3319 {
3320 if (net_client_init(NULL, opts, 0) < 0)
3321 return -1;
3322 return 0;
3323 }
3324
3325 static int net_init_netdev(QemuOpts *opts, void *dummy)
3326 {
3327 return net_client_init(NULL, opts, 1);
3328 }
3329
3330 int net_init_clients(void)
3331 {
3332 if (QTAILQ_EMPTY(&qemu_net_opts.head)) {
3333 /* if no clients, we use a default config */
3334 qemu_opts_set(&qemu_net_opts, NULL, "type", "nic");
3335 #ifdef CONFIG_SLIRP
3336 qemu_opts_set(&qemu_net_opts, NULL, "type", "user");
3337 #endif
3338 }
3339
3340 QTAILQ_INIT(&vlans);
3341 QTAILQ_INIT(&non_vlan_clients);
3342
3343 if (qemu_opts_foreach(&qemu_netdev_opts, net_init_netdev, NULL, 1) == -1)
3344 return -1;
3345
3346 if (qemu_opts_foreach(&qemu_net_opts, net_init_client, NULL, 1) == -1) {
3347 return -1;
3348 }
3349
3350 net_check_clients();
3351
3352 return 0;
3353 }
3354
3355 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
3356 {
3357 #if defined(CONFIG_SLIRP)
3358 /* handle legacy -net channel,port:chr */
3359 if (!strcmp(opts_list->name, "net") &&
3360 !strncmp(optarg, "channel,", strlen("channel,"))) {
3361 int ret;
3362
3363 optarg += strlen("channel,");
3364
3365 if (QTAILQ_EMPTY(&slirp_stacks)) {
3366 struct slirp_config_str *config;
3367
3368 config = qemu_malloc(sizeof(*config));
3369 pstrcpy(config->str, sizeof(config->str), optarg);
3370 config->flags = SLIRP_CFG_LEGACY;
3371 config->next = slirp_configs;
3372 slirp_configs = config;
3373 ret = 0;
3374 } else {
3375 ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);
3376 }
3377
3378 return ret;
3379 }
3380 #endif
3381 if (!qemu_opts_parse(opts_list, optarg, "type")) {
3382 return -1;
3383 }
3384
3385 return 0;
3386 }
QEmu