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monitor: Convert do_system_powerdown() to QObject
[qemu/aliguori-queue.git] / net.c
blob2e4dd58e7475647248e32564c30ed41a7a28f5fc
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 #include "qemu-queue.h"
117
118
119 static VLANState *first_vlan;
120
121 /***********************************************************/
122 /* network device redirectors */
123
124 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
125 static void hex_dump(FILE *f, const uint8_t *buf, int size)
126 {
127 int len, i, j, c;
128
129 for(i=0;i<size;i+=16) {
130 len = size - i;
131 if (len > 16)
132 len = 16;
133 fprintf(f, "%08x ", i);
134 for(j=0;j<16;j++) {
135 if (j < len)
136 fprintf(f, " %02x", buf[i+j]);
137 else
138 fprintf(f, " ");
139 }
140 fprintf(f, " ");
141 for(j=0;j<len;j++) {
142 c = buf[i+j];
143 if (c < ' ' || c > '~')
144 c = '.';
145 fprintf(f, "%c", c);
146 }
147 fprintf(f, "\n");
148 }
149 }
150 #endif
151
152 static int parse_macaddr(uint8_t *macaddr, const char *p)
153 {
154 int i;
155 char *last_char;
156 long int offset;
157
158 errno = 0;
159 offset = strtol(p, &last_char, 0);
160 if (0 == errno && '\0' == *last_char &&
161 offset >= 0 && offset <= 0xFFFFFF) {
162 macaddr[3] = (offset & 0xFF0000) >> 16;
163 macaddr[4] = (offset & 0xFF00) >> 8;
164 macaddr[5] = offset & 0xFF;
165 return 0;
166 } else {
167 for(i = 0; i < 6; i++) {
168 macaddr[i] = strtol(p, (char **)&p, 16);
169 if (i == 5) {
170 if (*p != '\0')
171 return -1;
172 } else {
173 if (*p != ':' && *p != '-')
174 return -1;
175 p++;
176 }
177 }
178 return 0;
179 }
180
181 return -1;
182 }
183
184 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
185 {
186 const char *p, *p1;
187 int len;
188 p = *pp;
189 p1 = strchr(p, sep);
190 if (!p1)
191 return -1;
192 len = p1 - p;
193 p1++;
194 if (buf_size > 0) {
195 if (len > buf_size - 1)
196 len = buf_size - 1;
197 memcpy(buf, p, len);
198 buf[len] = '\0';
199 }
200 *pp = p1;
201 return 0;
202 }
203
204 int parse_host_src_port(struct sockaddr_in *haddr,
205 struct sockaddr_in *saddr,
206 const char *input_str)
207 {
208 char *str = strdup(input_str);
209 char *host_str = str;
210 char *src_str;
211 const char *src_str2;
212 char *ptr;
213
214 /*
215 * Chop off any extra arguments at the end of the string which
216 * would start with a comma, then fill in the src port information
217 * if it was provided else use the "any address" and "any port".
218 */
219 if ((ptr = strchr(str,',')))
220 *ptr = '\0';
221
222 if ((src_str = strchr(input_str,'@'))) {
223 *src_str = '\0';
224 src_str++;
225 }
226
227 if (parse_host_port(haddr, host_str) < 0)
228 goto fail;
229
230 src_str2 = src_str;
231 if (!src_str || *src_str == '\0')
232 src_str2 = ":0";
233
234 if (parse_host_port(saddr, src_str2) < 0)
235 goto fail;
236
237 free(str);
238 return(0);
239
240 fail:
241 free(str);
242 return -1;
243 }
244
245 int parse_host_port(struct sockaddr_in *saddr, const char *str)
246 {
247 char buf[512];
248 struct hostent *he;
249 const char *p, *r;
250 int port;
251
252 p = str;
253 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
254 return -1;
255 saddr->sin_family = AF_INET;
256 if (buf[0] == '\0') {
257 saddr->sin_addr.s_addr = 0;
258 } else {
259 if (qemu_isdigit(buf[0])) {
260 if (!inet_aton(buf, &saddr->sin_addr))
261 return -1;
262 } else {
263 if ((he = gethostbyname(buf)) == NULL)
264 return - 1;
265 saddr->sin_addr = *(struct in_addr *)he->h_addr;
266 }
267 }
268 port = strtol(p, (char **)&r, 0);
269 if (r == p)
270 return -1;
271 saddr->sin_port = htons(port);
272 return 0;
273 }
274
275 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
276 {
277 snprintf(vc->info_str, sizeof(vc->info_str),
278 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
279 vc->model,
280 macaddr[0], macaddr[1], macaddr[2],
281 macaddr[3], macaddr[4], macaddr[5]);
282 }
283
284 static char *assign_name(VLANClientState *vc1, const char *model)
285 {
286 VLANState *vlan;
287 char buf[256];
288 int id = 0;
289
290 for (vlan = first_vlan; vlan; vlan = vlan->next) {
291 VLANClientState *vc;
292
293 for (vc = vlan->first_client; vc; vc = vc->next)
294 if (vc != vc1 && strcmp(vc->model, model) == 0)
295 id++;
296 }
297
298 snprintf(buf, sizeof(buf), "%s.%d", model, id);
299
300 return qemu_strdup(buf);
301 }
302
303 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
304 const char *model,
305 const char *name,
306 NetCanReceive *can_receive,
307 NetReceive *receive,
308 NetReceiveIOV *receive_iov,
309 NetCleanup *cleanup,
310 void *opaque)
311 {
312 VLANClientState *vc, **pvc;
313 vc = qemu_mallocz(sizeof(VLANClientState));
314 vc->model = qemu_strdup(model);
315 if (name)
316 vc->name = qemu_strdup(name);
317 else
318 vc->name = assign_name(vc, model);
319 vc->can_receive = can_receive;
320 vc->receive = receive;
321 vc->receive_iov = receive_iov;
322 vc->cleanup = cleanup;
323 vc->opaque = opaque;
324 vc->vlan = vlan;
325
326 vc->next = NULL;
327 pvc = &vlan->first_client;
328 while (*pvc != NULL)
329 pvc = &(*pvc)->next;
330 *pvc = vc;
331 return vc;
332 }
333
334 void qemu_del_vlan_client(VLANClientState *vc)
335 {
336 VLANClientState **pvc = &vc->vlan->first_client;
337
338 while (*pvc != NULL)
339 if (*pvc == vc) {
340 *pvc = vc->next;
341 if (vc->cleanup) {
342 vc->cleanup(vc);
343 }
344 qemu_free(vc->name);
345 qemu_free(vc->model);
346 qemu_free(vc);
347 break;
348 } else
349 pvc = &(*pvc)->next;
350 }
351
352 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
353 {
354 VLANClientState **pvc = &vlan->first_client;
355
356 while (*pvc != NULL)
357 if ((*pvc)->opaque == opaque)
358 return *pvc;
359 else
360 pvc = &(*pvc)->next;
361
362 return NULL;
363 }
364
365 static VLANClientState *
366 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
367 const char *client_str)
368 {
369 VLANState *vlan;
370 VLANClientState *vc;
371
372 vlan = qemu_find_vlan(vlan_id, 0);
373 if (!vlan) {
374 monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
375 return NULL;
376 }
377
378 for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
379 if (!strcmp(vc->name, client_str)) {
380 break;
381 }
382 }
383 if (!vc) {
384 monitor_printf(mon, "can't find device %s on VLAN %d\n",
385 client_str, vlan_id);
386 }
387
388 return vc;
389 }
390
391 int qemu_can_send_packet(VLANClientState *sender)
392 {
393 VLANState *vlan = sender->vlan;
394 VLANClientState *vc;
395
396 for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
397 if (vc == sender) {
398 continue;
399 }
400
401 /* no can_receive() handler, they can always receive */
402 if (!vc->can_receive || vc->can_receive(vc)) {
403 return 1;
404 }
405 }
406 return 0;
407 }
408
409 static int
410 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
411 {
412 VLANClientState *vc;
413 int ret = -1;
414
415 sender->vlan->delivering = 1;
416
417 for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
418 ssize_t len;
419
420 if (vc == sender) {
421 continue;
422 }
423
424 if (vc->link_down) {
425 ret = size;
426 continue;
427 }
428
429 len = vc->receive(vc, buf, size);
430
431 ret = (ret >= 0) ? ret : len;
432 }
433
434 sender->vlan->delivering = 0;
435
436 return ret;
437 }
438
439 void qemu_purge_queued_packets(VLANClientState *vc)
440 {
441 VLANPacket *packet, *next;
442
443 QTAILQ_FOREACH_SAFE(packet, &vc->vlan->send_queue, entry, next) {
444 if (packet->sender == vc) {
445 QTAILQ_REMOVE(&vc->vlan->send_queue, packet, entry);
446 qemu_free(packet);
447 }
448 }
449 }
450
451 void qemu_flush_queued_packets(VLANClientState *vc)
452 {
453 while (!QTAILQ_EMPTY(&vc->vlan->send_queue)) {
454 VLANPacket *packet;
455 int ret;
456
457 packet = QTAILQ_FIRST(&vc->vlan->send_queue);
458 QTAILQ_REMOVE(&vc->vlan->send_queue, packet, entry);
459
460 ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
461 if (ret == 0 && packet->sent_cb != NULL) {
462 QTAILQ_INSERT_HEAD(&vc->vlan->send_queue, packet, entry);
463 break;
464 }
465
466 if (packet->sent_cb)
467 packet->sent_cb(packet->sender, ret);
468
469 qemu_free(packet);
470 }
471 }
472
473 static void qemu_enqueue_packet(VLANClientState *sender,
474 const uint8_t *buf, int size,
475 NetPacketSent *sent_cb)
476 {
477 VLANPacket *packet;
478
479 packet = qemu_malloc(sizeof(VLANPacket) + size);
480 packet->sender = sender;
481 packet->size = size;
482 packet->sent_cb = sent_cb;
483 memcpy(packet->data, buf, size);
484
485 QTAILQ_INSERT_TAIL(&sender->vlan->send_queue, packet, entry);
486 }
487
488 ssize_t qemu_send_packet_async(VLANClientState *sender,
489 const uint8_t *buf, int size,
490 NetPacketSent *sent_cb)
491 {
492 int ret;
493
494 if (sender->link_down) {
495 return size;
496 }
497
498 #ifdef DEBUG_NET
499 printf("vlan %d send:\n", sender->vlan->id);
500 hex_dump(stdout, buf, size);
501 #endif
502
503 if (sender->vlan->delivering) {
504 qemu_enqueue_packet(sender, buf, size, NULL);
505 return size;
506 }
507
508 ret = qemu_deliver_packet(sender, buf, size);
509 if (ret == 0 && sent_cb != NULL) {
510 qemu_enqueue_packet(sender, buf, size, sent_cb);
511 return 0;
512 }
513
514 qemu_flush_queued_packets(sender);
515
516 return ret;
517 }
518
519 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
520 {
521 qemu_send_packet_async(vc, buf, size, NULL);
522 }
523
524 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
525 int iovcnt)
526 {
527 uint8_t buffer[4096];
528 size_t offset = 0;
529 int i;
530
531 for (i = 0; i < iovcnt; i++) {
532 size_t len;
533
534 len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
535 memcpy(buffer + offset, iov[i].iov_base, len);
536 offset += len;
537 }
538
539 return vc->receive(vc, buffer, offset);
540 }
541
542 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
543 {
544 size_t offset = 0;
545 int i;
546
547 for (i = 0; i < iovcnt; i++)
548 offset += iov[i].iov_len;
549 return offset;
550 }
551
552 static int qemu_deliver_packet_iov(VLANClientState *sender,
553 const struct iovec *iov, int iovcnt)
554 {
555 VLANClientState *vc;
556 int ret = -1;
557
558 sender->vlan->delivering = 1;
559
560 for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
561 ssize_t len;
562
563 if (vc == sender) {
564 continue;
565 }
566
567 if (vc->link_down) {
568 ret = calc_iov_length(iov, iovcnt);
569 continue;
570 }
571
572 if (vc->receive_iov) {
573 len = vc->receive_iov(vc, iov, iovcnt);
574 } else {
575 len = vc_sendv_compat(vc, iov, iovcnt);
576 }
577
578 ret = (ret >= 0) ? ret : len;
579 }
580
581 sender->vlan->delivering = 0;
582
583 return ret;
584 }
585
586 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
587 const struct iovec *iov, int iovcnt,
588 NetPacketSent *sent_cb)
589 {
590 VLANPacket *packet;
591 size_t max_len = 0;
592 int i;
593
594 max_len = calc_iov_length(iov, iovcnt);
595
596 packet = qemu_malloc(sizeof(VLANPacket) + max_len);
597 packet->sender = sender;
598 packet->sent_cb = sent_cb;
599 packet->size = 0;
600
601 for (i = 0; i < iovcnt; i++) {
602 size_t len = iov[i].iov_len;
603
604 memcpy(packet->data + packet->size, iov[i].iov_base, len);
605 packet->size += len;
606 }
607
608 QTAILQ_INSERT_TAIL(&sender->vlan->send_queue, packet, entry);
609
610 return packet->size;
611 }
612
613 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
614 const struct iovec *iov, int iovcnt,
615 NetPacketSent *sent_cb)
616 {
617 int ret;
618
619 if (sender->link_down) {
620 return calc_iov_length(iov, iovcnt);
621 }
622
623 if (sender->vlan->delivering) {
624 return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
625 }
626
627 ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
628 if (ret == 0 && sent_cb != NULL) {
629 qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
630 return 0;
631 }
632
633 qemu_flush_queued_packets(sender);
634
635 return ret;
636 }
637
638 ssize_t
639 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
640 {
641 return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
642 }
643
644 #if defined(CONFIG_SLIRP)
645
646 /* slirp network adapter */
647
648 #define SLIRP_CFG_HOSTFWD 1
649 #define SLIRP_CFG_LEGACY 2
650
651 struct slirp_config_str {
652 struct slirp_config_str *next;
653 int flags;
654 char str[1024];
655 int legacy_format;
656 };
657
658 typedef struct SlirpState {
659 QTAILQ_ENTRY(SlirpState) entry;
660 VLANClientState *vc;
661 Slirp *slirp;
662 #ifndef _WIN32
663 char smb_dir[128];
664 #endif
665 } SlirpState;
666
667 static struct slirp_config_str *slirp_configs;
668 const char *legacy_tftp_prefix;
669 const char *legacy_bootp_filename;
670 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
671 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
672
673 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
674 int legacy_format);
675 static int slirp_guestfwd(SlirpState *s, const char *config_str,
676 int legacy_format);
677
678 #ifndef _WIN32
679 static const char *legacy_smb_export;
680
681 static int slirp_smb(SlirpState *s, const char *exported_dir,
682 struct in_addr vserver_addr);
683 static void slirp_smb_cleanup(SlirpState *s);
684 #else
685 static inline void slirp_smb_cleanup(SlirpState *s) { }
686 #endif
687
688 int slirp_can_output(void *opaque)
689 {
690 SlirpState *s = opaque;
691
692 return qemu_can_send_packet(s->vc);
693 }
694
695 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
696 {
697 SlirpState *s = opaque;
698
699 #ifdef DEBUG_SLIRP
700 printf("slirp output:\n");
701 hex_dump(stdout, pkt, pkt_len);
702 #endif
703 qemu_send_packet(s->vc, pkt, pkt_len);
704 }
705
706 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
707 {
708 SlirpState *s = vc->opaque;
709
710 #ifdef DEBUG_SLIRP
711 printf("slirp input:\n");
712 hex_dump(stdout, buf, size);
713 #endif
714 slirp_input(s->slirp, buf, size);
715 return size;
716 }
717
718 static void net_slirp_cleanup(VLANClientState *vc)
719 {
720 SlirpState *s = vc->opaque;
721
722 slirp_cleanup(s->slirp);
723 slirp_smb_cleanup(s);
724 QTAILQ_REMOVE(&slirp_stacks, s, entry);
725 qemu_free(s);
726 }
727
728 static int net_slirp_init(VLANState *vlan, const char *model,
729 const char *name, int restricted,
730 const char *vnetwork, const char *vhost,
731 const char *vhostname, const char *tftp_export,
732 const char *bootfile, const char *vdhcp_start,
733 const char *vnameserver, const char *smb_export,
734 const char *vsmbserver)
735 {
736 /* default settings according to historic slirp */
737 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
738 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
739 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
740 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
741 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
742 #ifndef _WIN32
743 struct in_addr smbsrv = { .s_addr = 0 };
744 #endif
745 SlirpState *s;
746 char buf[20];
747 uint32_t addr;
748 int shift;
749 char *end;
750 struct slirp_config_str *config;
751
752 if (!tftp_export) {
753 tftp_export = legacy_tftp_prefix;
754 }
755 if (!bootfile) {
756 bootfile = legacy_bootp_filename;
757 }
758
759 if (vnetwork) {
760 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
761 if (!inet_aton(vnetwork, &net)) {
762 return -1;
763 }
764 addr = ntohl(net.s_addr);
765 if (!(addr & 0x80000000)) {
766 mask.s_addr = htonl(0xff000000); /* class A */
767 } else if ((addr & 0xfff00000) == 0xac100000) {
768 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
769 } else if ((addr & 0xc0000000) == 0x80000000) {
770 mask.s_addr = htonl(0xffff0000); /* class B */
771 } else if ((addr & 0xffff0000) == 0xc0a80000) {
772 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
773 } else if ((addr & 0xffff0000) == 0xc6120000) {
774 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
775 } else if ((addr & 0xe0000000) == 0xe0000000) {
776 mask.s_addr = htonl(0xffffff00); /* class C */
777 } else {
778 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
779 }
780 } else {
781 if (!inet_aton(buf, &net)) {
782 return -1;
783 }
784 shift = strtol(vnetwork, &end, 10);
785 if (*end != '\0') {
786 if (!inet_aton(vnetwork, &mask)) {
787 return -1;
788 }
789 } else if (shift < 4 || shift > 32) {
790 return -1;
791 } else {
792 mask.s_addr = htonl(0xffffffff << (32 - shift));
793 }
794 }
795 net.s_addr &= mask.s_addr;
796 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
797 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
798 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
799 }
800
801 if (vhost && !inet_aton(vhost, &host)) {
802 return -1;
803 }
804 if ((host.s_addr & mask.s_addr) != net.s_addr) {
805 return -1;
806 }
807
808 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
809 return -1;
810 }
811 if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
812 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
813 return -1;
814 }
815
816 if (vnameserver && !inet_aton(vnameserver, &dns)) {
817 return -1;
818 }
819 if ((dns.s_addr & mask.s_addr) != net.s_addr ||
820 dns.s_addr == host.s_addr) {
821 return -1;
822 }
823
824 #ifndef _WIN32
825 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
826 return -1;
827 }
828 #endif
829
830 s = qemu_mallocz(sizeof(SlirpState));
831 s->slirp = slirp_init(restricted, net, mask, host, vhostname,
832 tftp_export, bootfile, dhcp, dns, s);
833 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
834
835 for (config = slirp_configs; config; config = config->next) {
836 if (config->flags & SLIRP_CFG_HOSTFWD) {
837 if (slirp_hostfwd(s, config->str,
838 config->flags & SLIRP_CFG_LEGACY) < 0)
839 return -1;
840 } else {
841 if (slirp_guestfwd(s, config->str,
842 config->flags & SLIRP_CFG_LEGACY) < 0)
843 return -1;
844 }
845 }
846 #ifndef _WIN32
847 if (!smb_export) {
848 smb_export = legacy_smb_export;
849 }
850 if (smb_export) {
851 if (slirp_smb(s, smb_export, smbsrv) < 0)
852 return -1;
853 }
854 #endif
855
856 s->vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive, NULL,
857 net_slirp_cleanup, s);
858 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
859 "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
860 return 0;
861 }
862
863 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
864 const char *stack)
865 {
866 VLANClientState *vc;
867
868 if (vlan) {
869 vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
870 if (!vc) {
871 return NULL;
872 }
873 if (strcmp(vc->model, "user")) {
874 monitor_printf(mon, "invalid device specified\n");
875 return NULL;
876 }
877 return vc->opaque;
878 } else {
879 if (QTAILQ_EMPTY(&slirp_stacks)) {
880 monitor_printf(mon, "user mode network stack not in use\n");
881 return NULL;
882 }
883 return QTAILQ_FIRST(&slirp_stacks);
884 }
885 }
886
887 void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict)
888 {
889 struct in_addr host_addr = { .s_addr = INADDR_ANY };
890 int host_port;
891 char buf[256] = "";
892 const char *src_str, *p;
893 SlirpState *s;
894 int is_udp = 0;
895 int err;
896 const char *arg1 = qdict_get_str(qdict, "arg1");
897 const char *arg2 = qdict_get_try_str(qdict, "arg2");
898 const char *arg3 = qdict_get_try_str(qdict, "arg3");
899
900 if (arg2) {
901 s = slirp_lookup(mon, arg1, arg2);
902 src_str = arg3;
903 } else {
904 s = slirp_lookup(mon, NULL, NULL);
905 src_str = arg1;
906 }
907 if (!s) {
908 return;
909 }
910
911 if (!src_str || !src_str[0])
912 goto fail_syntax;
913
914 p = src_str;
915 get_str_sep(buf, sizeof(buf), &p, ':');
916
917 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
918 is_udp = 0;
919 } else if (!strcmp(buf, "udp")) {
920 is_udp = 1;
921 } else {
922 goto fail_syntax;
923 }
924
925 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
926 goto fail_syntax;
927 }
928 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
929 goto fail_syntax;
930 }
931
932 host_port = atoi(p);
933
934 err = slirp_remove_hostfwd(QTAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
935 host_addr, host_port);
936
937 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
938 err ? "removed" : "not found");
939 return;
940
941 fail_syntax:
942 monitor_printf(mon, "invalid format\n");
943 }
944
945 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
946 int legacy_format)
947 {
948 struct in_addr host_addr = { .s_addr = INADDR_ANY };
949 struct in_addr guest_addr = { .s_addr = 0 };
950 int host_port, guest_port;
951 const char *p;
952 char buf[256];
953 int is_udp;
954 char *end;
955
956 p = redir_str;
957 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
958 goto fail_syntax;
959 }
960 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
961 is_udp = 0;
962 } else if (!strcmp(buf, "udp")) {
963 is_udp = 1;
964 } else {
965 goto fail_syntax;
966 }
967
968 if (!legacy_format) {
969 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
970 goto fail_syntax;
971 }
972 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
973 goto fail_syntax;
974 }
975 }
976
977 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
978 goto fail_syntax;
979 }
980 host_port = strtol(buf, &end, 0);
981 if (*end != '\0' || host_port < 1 || host_port > 65535) {
982 goto fail_syntax;
983 }
984
985 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
986 goto fail_syntax;
987 }
988 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
989 goto fail_syntax;
990 }
991
992 guest_port = strtol(p, &end, 0);
993 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
994 goto fail_syntax;
995 }
996
997 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
998 guest_port) < 0) {
999 qemu_error("could not set up host forwarding rule '%s'\n",
1000 redir_str);
1001 return -1;
1002 }
1003 return 0;
1004
1005 fail_syntax:
1006 qemu_error("invalid host forwarding rule '%s'\n", redir_str);
1007 return -1;
1008 }
1009
1010 void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict)
1011 {
1012 const char *redir_str;
1013 SlirpState *s;
1014 const char *arg1 = qdict_get_str(qdict, "arg1");
1015 const char *arg2 = qdict_get_try_str(qdict, "arg2");
1016 const char *arg3 = qdict_get_try_str(qdict, "arg3");
1017
1018 if (arg2) {
1019 s = slirp_lookup(mon, arg1, arg2);
1020 redir_str = arg3;
1021 } else {
1022 s = slirp_lookup(mon, NULL, NULL);
1023 redir_str = arg1;
1024 }
1025 if (s) {
1026 slirp_hostfwd(s, redir_str, 0);
1027 }
1028
1029 }
1030
1031 int net_slirp_redir(const char *redir_str)
1032 {
1033 struct slirp_config_str *config;
1034
1035 if (QTAILQ_EMPTY(&slirp_stacks)) {
1036 config = qemu_malloc(sizeof(*config));
1037 pstrcpy(config->str, sizeof(config->str), redir_str);
1038 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1039 config->next = slirp_configs;
1040 slirp_configs = config;
1041 return 0;
1042 }
1043
1044 return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1);
1045 }
1046
1047 #ifndef _WIN32
1048
1049 /* automatic user mode samba server configuration */
1050 static void slirp_smb_cleanup(SlirpState *s)
1051 {
1052 char cmd[128];
1053
1054 if (s->smb_dir[0] != '\0') {
1055 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1056 system(cmd);
1057 s->smb_dir[0] = '\0';
1058 }
1059 }
1060
1061 static int slirp_smb(SlirpState* s, const char *exported_dir,
1062 struct in_addr vserver_addr)
1063 {
1064 static int instance;
1065 char smb_conf[128];
1066 char smb_cmdline[128];
1067 FILE *f;
1068
1069 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1070 (long)getpid(), instance++);
1071 if (mkdir(s->smb_dir, 0700) < 0) {
1072 qemu_error("could not create samba server dir '%s'\n", s->smb_dir);
1073 return -1;
1074 }
1075 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1076
1077 f = fopen(smb_conf, "w");
1078 if (!f) {
1079 slirp_smb_cleanup(s);
1080 qemu_error("could not create samba server configuration file '%s'\n",
1081 smb_conf);
1082 return -1;
1083 }
1084 fprintf(f,
1085 "[global]\n"
1086 "private dir=%s\n"
1087 "smb ports=0\n"
1088 "socket address=127.0.0.1\n"
1089 "pid directory=%s\n"
1090 "lock directory=%s\n"
1091 "log file=%s/log.smbd\n"
1092 "smb passwd file=%s/smbpasswd\n"
1093 "security = share\n"
1094 "[qemu]\n"
1095 "path=%s\n"
1096 "read only=no\n"
1097 "guest ok=yes\n",
1098 s->smb_dir,
1099 s->smb_dir,
1100 s->smb_dir,
1101 s->smb_dir,
1102 s->smb_dir,
1103 exported_dir
1104 );
1105 fclose(f);
1106
1107 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1108 SMBD_COMMAND, smb_conf);
1109
1110 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) {
1111 slirp_smb_cleanup(s);
1112 qemu_error("conflicting/invalid smbserver address\n");
1113 return -1;
1114 }
1115 return 0;
1116 }
1117
1118 /* automatic user mode samba server configuration (legacy interface) */
1119 int net_slirp_smb(const char *exported_dir)
1120 {
1121 struct in_addr vserver_addr = { .s_addr = 0 };
1122
1123 if (legacy_smb_export) {
1124 fprintf(stderr, "-smb given twice\n");
1125 return -1;
1126 }
1127 legacy_smb_export = exported_dir;
1128 if (!QTAILQ_EMPTY(&slirp_stacks)) {
1129 return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
1130 vserver_addr);
1131 }
1132 return 0;
1133 }
1134
1135 #endif /* !defined(_WIN32) */
1136
1137 struct GuestFwd {
1138 CharDriverState *hd;
1139 struct in_addr server;
1140 int port;
1141 Slirp *slirp;
1142 };
1143
1144 static int guestfwd_can_read(void *opaque)
1145 {
1146 struct GuestFwd *fwd = opaque;
1147 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1148 }
1149
1150 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1151 {
1152 struct GuestFwd *fwd = opaque;
1153 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1154 }
1155
1156 static int slirp_guestfwd(SlirpState *s, const char *config_str,
1157 int legacy_format)
1158 {
1159 struct in_addr server = { .s_addr = 0 };
1160 struct GuestFwd *fwd;
1161 const char *p;
1162 char buf[128];
1163 char *end;
1164 int port;
1165
1166 p = config_str;
1167 if (legacy_format) {
1168 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1169 goto fail_syntax;
1170 }
1171 } else {
1172 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1173 goto fail_syntax;
1174 }
1175 if (strcmp(buf, "tcp") && buf[0] != '\0') {
1176 goto fail_syntax;
1177 }
1178 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1179 goto fail_syntax;
1180 }
1181 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1182 goto fail_syntax;
1183 }
1184 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1185 goto fail_syntax;
1186 }
1187 }
1188 port = strtol(buf, &end, 10);
1189 if (*end != '\0' || port < 1 || port > 65535) {
1190 goto fail_syntax;
1191 }
1192
1193 fwd = qemu_malloc(sizeof(struct GuestFwd));
1194 snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1195 fwd->hd = qemu_chr_open(buf, p, NULL);
1196 if (!fwd->hd) {
1197 qemu_error("could not open guest forwarding device '%s'\n", buf);
1198 qemu_free(fwd);
1199 return -1;
1200 }
1201
1202 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
1203 qemu_error("conflicting/invalid host:port in guest forwarding "
1204 "rule '%s'\n", config_str);
1205 qemu_free(fwd);
1206 return -1;
1207 }
1208 fwd->server = server;
1209 fwd->port = port;
1210 fwd->slirp = s->slirp;
1211
1212 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1213 NULL, fwd);
1214 return 0;
1215
1216 fail_syntax:
1217 qemu_error("invalid guest forwarding rule '%s'\n", config_str);
1218 return -1;
1219 }
1220
1221 void do_info_usernet(Monitor *mon)
1222 {
1223 SlirpState *s;
1224
1225 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
1226 monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1227 slirp_connection_info(s->slirp, mon);
1228 }
1229 }
1230
1231 #endif /* CONFIG_SLIRP */
1232
1233 #if !defined(_WIN32)
1234
1235 typedef struct TAPState {
1236 VLANClientState *vc;
1237 int fd;
1238 char down_script[1024];
1239 char down_script_arg[128];
1240 uint8_t buf[4096];
1241 unsigned int read_poll : 1;
1242 unsigned int write_poll : 1;
1243 } TAPState;
1244
1245 static int launch_script(const char *setup_script, const char *ifname, int fd);
1246
1247 static int tap_can_send(void *opaque);
1248 static void tap_send(void *opaque);
1249 static void tap_writable(void *opaque);
1250
1251 static void tap_update_fd_handler(TAPState *s)
1252 {
1253 qemu_set_fd_handler2(s->fd,
1254 s->read_poll ? tap_can_send : NULL,
1255 s->read_poll ? tap_send : NULL,
1256 s->write_poll ? tap_writable : NULL,
1257 s);
1258 }
1259
1260 static void tap_read_poll(TAPState *s, int enable)
1261 {
1262 s->read_poll = !!enable;
1263 tap_update_fd_handler(s);
1264 }
1265
1266 static void tap_write_poll(TAPState *s, int enable)
1267 {
1268 s->write_poll = !!enable;
1269 tap_update_fd_handler(s);
1270 }
1271
1272 static void tap_writable(void *opaque)
1273 {
1274 TAPState *s = opaque;
1275
1276 tap_write_poll(s, 0);
1277
1278 qemu_flush_queued_packets(s->vc);
1279 }
1280
1281 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1282 int iovcnt)
1283 {
1284 TAPState *s = vc->opaque;
1285 ssize_t len;
1286
1287 do {
1288 len = writev(s->fd, iov, iovcnt);
1289 } while (len == -1 && errno == EINTR);
1290
1291 if (len == -1 && errno == EAGAIN) {
1292 tap_write_poll(s, 1);
1293 return 0;
1294 }
1295
1296 return len;
1297 }
1298
1299 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1300 {
1301 TAPState *s = vc->opaque;
1302 ssize_t len;
1303
1304 do {
1305 len = write(s->fd, buf, size);
1306 } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1307
1308 return len;
1309 }
1310
1311 static int tap_can_send(void *opaque)
1312 {
1313 TAPState *s = opaque;
1314
1315 return qemu_can_send_packet(s->vc);
1316 }
1317
1318 #ifdef __sun__
1319 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1320 {
1321 struct strbuf sbuf;
1322 int f = 0;
1323
1324 sbuf.maxlen = maxlen;
1325 sbuf.buf = (char *)buf;
1326
1327 return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1328 }
1329 #else
1330 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1331 {
1332 return read(tapfd, buf, maxlen);
1333 }
1334 #endif
1335
1336 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1337 {
1338 TAPState *s = vc->opaque;
1339 tap_read_poll(s, 1);
1340 }
1341
1342 static void tap_send(void *opaque)
1343 {
1344 TAPState *s = opaque;
1345 int size;
1346
1347 do {
1348 size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1349 if (size <= 0) {
1350 break;
1351 }
1352
1353 size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1354 if (size == 0) {
1355 tap_read_poll(s, 0);
1356 }
1357 } while (size > 0);
1358 }
1359
1360 #ifdef TUNSETSNDBUF
1361 /* sndbuf should be set to a value lower than the tx queue
1362 * capacity of any destination network interface.
1363 * Ethernet NICs generally have txqueuelen=1000, so 1Mb is
1364 * a good default, given a 1500 byte MTU.
1365 */
1366 #define TAP_DEFAULT_SNDBUF 1024*1024
1367
1368 static int tap_set_sndbuf(TAPState *s, QemuOpts *opts)
1369 {
1370 int sndbuf;
1371
1372 sndbuf = qemu_opt_get_size(opts, "sndbuf", TAP_DEFAULT_SNDBUF);
1373 if (!sndbuf) {
1374 sndbuf = INT_MAX;
1375 }
1376
1377 if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1 && qemu_opt_get(opts, "sndbuf")) {
1378 qemu_error("TUNSETSNDBUF ioctl failed: %s\n", strerror(errno));
1379 return -1;
1380 }
1381 return 0;
1382 }
1383 #else
1384 static int tap_set_sndbuf(TAPState *s, QemuOpts *opts)
1385 {
1386 return 0;
1387 }
1388 #endif /* TUNSETSNDBUF */
1389
1390 static void tap_cleanup(VLANClientState *vc)
1391 {
1392 TAPState *s = vc->opaque;
1393
1394 qemu_purge_queued_packets(vc);
1395
1396 if (s->down_script[0])
1397 launch_script(s->down_script, s->down_script_arg, s->fd);
1398
1399 tap_read_poll(s, 0);
1400 tap_write_poll(s, 0);
1401 close(s->fd);
1402 qemu_free(s);
1403 }
1404
1405 /* fd support */
1406
1407 static TAPState *net_tap_fd_init(VLANState *vlan,
1408 const char *model,
1409 const char *name,
1410 int fd)
1411 {
1412 TAPState *s;
1413
1414 s = qemu_mallocz(sizeof(TAPState));
1415 s->fd = fd;
1416 s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1417 tap_receive_iov, tap_cleanup, s);
1418 tap_read_poll(s, 1);
1419 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1420 return s;
1421 }
1422
1423 #if defined (CONFIG_BSD) || defined (__FreeBSD_kernel__)
1424 static int tap_open(char *ifname, int ifname_size)
1425 {
1426 int fd;
1427 char *dev;
1428 struct stat s;
1429
1430 TFR(fd = open("/dev/tap", O_RDWR));
1431 if (fd < 0) {
1432 fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1433 return -1;
1434 }
1435
1436 fstat(fd, &s);
1437 dev = devname(s.st_rdev, S_IFCHR);
1438 pstrcpy(ifname, ifname_size, dev);
1439
1440 fcntl(fd, F_SETFL, O_NONBLOCK);
1441 return fd;
1442 }
1443 #elif defined(__sun__)
1444 #define TUNNEWPPA (('T'<<16) | 0x0001)
1445 /*
1446 * Allocate TAP device, returns opened fd.
1447 * Stores dev name in the first arg(must be large enough).
1448 */
1449 static int tap_alloc(char *dev, size_t dev_size)
1450 {
1451 int tap_fd, if_fd, ppa = -1;
1452 static int ip_fd = 0;
1453 char *ptr;
1454
1455 static int arp_fd = 0;
1456 int ip_muxid, arp_muxid;
1457 struct strioctl strioc_if, strioc_ppa;
1458 int link_type = I_PLINK;;
1459 struct lifreq ifr;
1460 char actual_name[32] = "";
1461
1462 memset(&ifr, 0x0, sizeof(ifr));
1463
1464 if( *dev ){
1465 ptr = dev;
1466 while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1467 ppa = atoi(ptr);
1468 }
1469
1470 /* Check if IP device was opened */
1471 if( ip_fd )
1472 close(ip_fd);
1473
1474 TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1475 if (ip_fd < 0) {
1476 syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1477 return -1;
1478 }
1479
1480 TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1481 if (tap_fd < 0) {
1482 syslog(LOG_ERR, "Can't open /dev/tap");
1483 return -1;
1484 }
1485
1486 /* Assign a new PPA and get its unit number. */
1487 strioc_ppa.ic_cmd = TUNNEWPPA;
1488 strioc_ppa.ic_timout = 0;
1489 strioc_ppa.ic_len = sizeof(ppa);
1490 strioc_ppa.ic_dp = (char *)&ppa;
1491 if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1492 syslog (LOG_ERR, "Can't assign new interface");
1493
1494 TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1495 if (if_fd < 0) {
1496 syslog(LOG_ERR, "Can't open /dev/tap (2)");
1497 return -1;
1498 }
1499 if(ioctl(if_fd, I_PUSH, "ip") < 0){
1500 syslog(LOG_ERR, "Can't push IP module");
1501 return -1;
1502 }
1503
1504 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1505 syslog(LOG_ERR, "Can't get flags\n");
1506
1507 snprintf (actual_name, 32, "tap%d", ppa);
1508 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1509
1510 ifr.lifr_ppa = ppa;
1511 /* Assign ppa according to the unit number returned by tun device */
1512
1513 if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1514 syslog (LOG_ERR, "Can't set PPA %d", ppa);
1515 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1516 syslog (LOG_ERR, "Can't get flags\n");
1517 /* Push arp module to if_fd */
1518 if (ioctl (if_fd, I_PUSH, "arp") < 0)
1519 syslog (LOG_ERR, "Can't push ARP module (2)");
1520
1521 /* Push arp module to ip_fd */
1522 if (ioctl (ip_fd, I_POP, NULL) < 0)
1523 syslog (LOG_ERR, "I_POP failed\n");
1524 if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1525 syslog (LOG_ERR, "Can't push ARP module (3)\n");
1526 /* Open arp_fd */
1527 TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1528 if (arp_fd < 0)
1529 syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1530
1531 /* Set ifname to arp */
1532 strioc_if.ic_cmd = SIOCSLIFNAME;
1533 strioc_if.ic_timout = 0;
1534 strioc_if.ic_len = sizeof(ifr);
1535 strioc_if.ic_dp = (char *)&ifr;
1536 if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1537 syslog (LOG_ERR, "Can't set ifname to arp\n");
1538 }
1539
1540 if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1541 syslog(LOG_ERR, "Can't link TAP device to IP");
1542 return -1;
1543 }
1544
1545 if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1546 syslog (LOG_ERR, "Can't link TAP device to ARP");
1547
1548 close (if_fd);
1549
1550 memset(&ifr, 0x0, sizeof(ifr));
1551 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1552 ifr.lifr_ip_muxid = ip_muxid;
1553 ifr.lifr_arp_muxid = arp_muxid;
1554
1555 if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1556 {
1557 ioctl (ip_fd, I_PUNLINK , arp_muxid);
1558 ioctl (ip_fd, I_PUNLINK, ip_muxid);
1559 syslog (LOG_ERR, "Can't set multiplexor id");
1560 }
1561
1562 snprintf(dev, dev_size, "tap%d", ppa);
1563 return tap_fd;
1564 }
1565
1566 static int tap_open(char *ifname, int ifname_size)
1567 {
1568 char dev[10]="";
1569 int fd;
1570 if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1571 fprintf(stderr, "Cannot allocate TAP device\n");
1572 return -1;
1573 }
1574 pstrcpy(ifname, ifname_size, dev);
1575 fcntl(fd, F_SETFL, O_NONBLOCK);
1576 return fd;
1577 }
1578 #elif defined (_AIX)
1579 static int tap_open(char *ifname, int ifname_size)
1580 {
1581 fprintf (stderr, "no tap on AIX\n");
1582 return -1;
1583 }
1584 #else
1585 static int tap_open(char *ifname, int ifname_size)
1586 {
1587 struct ifreq ifr;
1588 int fd, ret;
1589
1590 TFR(fd = open("/dev/net/tun", O_RDWR));
1591 if (fd < 0) {
1592 fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1593 return -1;
1594 }
1595 memset(&ifr, 0, sizeof(ifr));
1596 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1597 if (ifname[0] != '\0')
1598 pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1599 else
1600 pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1601 ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1602 if (ret != 0) {
1603 fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1604 close(fd);
1605 return -1;
1606 }
1607 pstrcpy(ifname, ifname_size, ifr.ifr_name);
1608 fcntl(fd, F_SETFL, O_NONBLOCK);
1609 return fd;
1610 }
1611 #endif
1612
1613 static int launch_script(const char *setup_script, const char *ifname, int fd)
1614 {
1615 sigset_t oldmask, mask;
1616 int pid, status;
1617 char *args[3];
1618 char **parg;
1619
1620 sigemptyset(&mask);
1621 sigaddset(&mask, SIGCHLD);
1622 sigprocmask(SIG_BLOCK, &mask, &oldmask);
1623
1624 /* try to launch network script */
1625 pid = fork();
1626 if (pid == 0) {
1627 int open_max = sysconf(_SC_OPEN_MAX), i;
1628
1629 for (i = 0; i < open_max; i++) {
1630 if (i != STDIN_FILENO &&
1631 i != STDOUT_FILENO &&
1632 i != STDERR_FILENO &&
1633 i != fd) {
1634 close(i);
1635 }
1636 }
1637 parg = args;
1638 *parg++ = (char *)setup_script;
1639 *parg++ = (char *)ifname;
1640 *parg++ = NULL;
1641 execv(setup_script, args);
1642 _exit(1);
1643 } else if (pid > 0) {
1644 while (waitpid(pid, &status, 0) != pid) {
1645 /* loop */
1646 }
1647 sigprocmask(SIG_SETMASK, &oldmask, NULL);
1648
1649 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1650 return 0;
1651 }
1652 }
1653 fprintf(stderr, "%s: could not launch network script\n", setup_script);
1654 return -1;
1655 }
1656
1657 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1658 const char *name, const char *ifname1,
1659 const char *setup_script, const char *down_script)
1660 {
1661 TAPState *s;
1662 int fd;
1663 char ifname[128];
1664
1665 if (ifname1 != NULL)
1666 pstrcpy(ifname, sizeof(ifname), ifname1);
1667 else
1668 ifname[0] = '\0';
1669 TFR(fd = tap_open(ifname, sizeof(ifname)));
1670 if (fd < 0)
1671 return NULL;
1672
1673 if (!setup_script || !strcmp(setup_script, "no"))
1674 setup_script = "";
1675 if (setup_script[0] != '\0' &&
1676 launch_script(setup_script, ifname, fd)) {
1677 return NULL;
1678 }
1679 s = net_tap_fd_init(vlan, model, name, fd);
1680 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1681 "ifname=%s,script=%s,downscript=%s",
1682 ifname, setup_script, down_script);
1683 if (down_script && strcmp(down_script, "no")) {
1684 snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1685 snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1686 }
1687 return s;
1688 }
1689
1690 #endif /* !_WIN32 */
1691
1692 #if defined(CONFIG_VDE)
1693 typedef struct VDEState {
1694 VLANClientState *vc;
1695 VDECONN *vde;
1696 } VDEState;
1697
1698 static void vde_to_qemu(void *opaque)
1699 {
1700 VDEState *s = opaque;
1701 uint8_t buf[4096];
1702 int size;
1703
1704 size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1705 if (size > 0) {
1706 qemu_send_packet(s->vc, buf, size);
1707 }
1708 }
1709
1710 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1711 {
1712 VDEState *s = vc->opaque;
1713 ssize_t ret;
1714
1715 do {
1716 ret = vde_send(s->vde, (const char *)buf, size, 0);
1717 } while (ret < 0 && errno == EINTR);
1718
1719 return ret;
1720 }
1721
1722 static void vde_cleanup(VLANClientState *vc)
1723 {
1724 VDEState *s = vc->opaque;
1725 qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1726 vde_close(s->vde);
1727 qemu_free(s);
1728 }
1729
1730 static int net_vde_init(VLANState *vlan, const char *model,
1731 const char *name, const char *sock,
1732 int port, const char *group, int mode)
1733 {
1734 VDEState *s;
1735 char *init_group = (char *)group;
1736 char *init_sock = (char *)sock;
1737
1738 struct vde_open_args args = {
1739 .port = port,
1740 .group = init_group,
1741 .mode = mode,
1742 };
1743
1744 s = qemu_mallocz(sizeof(VDEState));
1745 s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1746 if (!s->vde){
1747 free(s);
1748 return -1;
1749 }
1750 s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1751 NULL, vde_cleanup, s);
1752 qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1753 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1754 sock, vde_datafd(s->vde));
1755 return 0;
1756 }
1757 #endif
1758
1759 /* network connection */
1760 typedef struct NetSocketState {
1761 VLANClientState *vc;
1762 int fd;
1763 int state; /* 0 = getting length, 1 = getting data */
1764 unsigned int index;
1765 unsigned int packet_len;
1766 uint8_t buf[4096];
1767 struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1768 } NetSocketState;
1769
1770 typedef struct NetSocketListenState {
1771 VLANState *vlan;
1772 char *model;
1773 char *name;
1774 int fd;
1775 } NetSocketListenState;
1776
1777 /* XXX: we consider we can send the whole packet without blocking */
1778 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1779 {
1780 NetSocketState *s = vc->opaque;
1781 uint32_t len;
1782 len = htonl(size);
1783
1784 send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1785 return send_all(s->fd, buf, size);
1786 }
1787
1788 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1789 {
1790 NetSocketState *s = vc->opaque;
1791
1792 return sendto(s->fd, (const void *)buf, size, 0,
1793 (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1794 }
1795
1796 static void net_socket_send(void *opaque)
1797 {
1798 NetSocketState *s = opaque;
1799 int size, err;
1800 unsigned l;
1801 uint8_t buf1[4096];
1802 const uint8_t *buf;
1803
1804 size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1805 if (size < 0) {
1806 err = socket_error();
1807 if (err != EWOULDBLOCK)
1808 goto eoc;
1809 } else if (size == 0) {
1810 /* end of connection */
1811 eoc:
1812 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1813 closesocket(s->fd);
1814 return;
1815 }
1816 buf = buf1;
1817 while (size > 0) {
1818 /* reassemble a packet from the network */
1819 switch(s->state) {
1820 case 0:
1821 l = 4 - s->index;
1822 if (l > size)
1823 l = size;
1824 memcpy(s->buf + s->index, buf, l);
1825 buf += l;
1826 size -= l;
1827 s->index += l;
1828 if (s->index == 4) {
1829 /* got length */
1830 s->packet_len = ntohl(*(uint32_t *)s->buf);
1831 s->index = 0;
1832 s->state = 1;
1833 }
1834 break;
1835 case 1:
1836 l = s->packet_len - s->index;
1837 if (l > size)
1838 l = size;
1839 if (s->index + l <= sizeof(s->buf)) {
1840 memcpy(s->buf + s->index, buf, l);
1841 } else {
1842 fprintf(stderr, "serious error: oversized packet received,"
1843 "connection terminated.\n");
1844 s->state = 0;
1845 goto eoc;
1846 }
1847
1848 s->index += l;
1849 buf += l;
1850 size -= l;
1851 if (s->index >= s->packet_len) {
1852 qemu_send_packet(s->vc, s->buf, s->packet_len);
1853 s->index = 0;
1854 s->state = 0;
1855 }
1856 break;
1857 }
1858 }
1859 }
1860
1861 static void net_socket_send_dgram(void *opaque)
1862 {
1863 NetSocketState *s = opaque;
1864 int size;
1865
1866 size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1867 if (size < 0)
1868 return;
1869 if (size == 0) {
1870 /* end of connection */
1871 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1872 return;
1873 }
1874 qemu_send_packet(s->vc, s->buf, size);
1875 }
1876
1877 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1878 {
1879 struct ip_mreq imr;
1880 int fd;
1881 int val, ret;
1882 if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1883 fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1884 inet_ntoa(mcastaddr->sin_addr),
1885 (int)ntohl(mcastaddr->sin_addr.s_addr));
1886 return -1;
1887
1888 }
1889 fd = socket(PF_INET, SOCK_DGRAM, 0);
1890 if (fd < 0) {
1891 perror("socket(PF_INET, SOCK_DGRAM)");
1892 return -1;
1893 }
1894
1895 val = 1;
1896 ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1897 (const char *)&val, sizeof(val));
1898 if (ret < 0) {
1899 perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1900 goto fail;
1901 }
1902
1903 ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1904 if (ret < 0) {
1905 perror("bind");
1906 goto fail;
1907 }
1908
1909 /* Add host to multicast group */
1910 imr.imr_multiaddr = mcastaddr->sin_addr;
1911 imr.imr_interface.s_addr = htonl(INADDR_ANY);
1912
1913 ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1914 (const char *)&imr, sizeof(struct ip_mreq));
1915 if (ret < 0) {
1916 perror("setsockopt(IP_ADD_MEMBERSHIP)");
1917 goto fail;
1918 }
1919
1920 /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1921 val = 1;
1922 ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1923 (const char *)&val, sizeof(val));
1924 if (ret < 0) {
1925 perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1926 goto fail;
1927 }
1928
1929 socket_set_nonblock(fd);
1930 return fd;
1931 fail:
1932 if (fd >= 0)
1933 closesocket(fd);
1934 return -1;
1935 }
1936
1937 static void net_socket_cleanup(VLANClientState *vc)
1938 {
1939 NetSocketState *s = vc->opaque;
1940 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1941 close(s->fd);
1942 qemu_free(s);
1943 }
1944
1945 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1946 const char *model,
1947 const char *name,
1948 int fd, int is_connected)
1949 {
1950 struct sockaddr_in saddr;
1951 int newfd;
1952 socklen_t saddr_len;
1953 NetSocketState *s;
1954
1955 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1956 * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1957 * by ONLY ONE process: we must "clone" this dgram socket --jjo
1958 */
1959
1960 if (is_connected) {
1961 if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1962 /* must be bound */
1963 if (saddr.sin_addr.s_addr==0) {
1964 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1965 fd);
1966 return NULL;
1967 }
1968 /* clone dgram socket */
1969 newfd = net_socket_mcast_create(&saddr);
1970 if (newfd < 0) {
1971 /* error already reported by net_socket_mcast_create() */
1972 close(fd);
1973 return NULL;
1974 }
1975 /* clone newfd to fd, close newfd */
1976 dup2(newfd, fd);
1977 close(newfd);
1978
1979 } else {
1980 fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1981 fd, strerror(errno));
1982 return NULL;
1983 }
1984 }
1985
1986 s = qemu_mallocz(sizeof(NetSocketState));
1987 s->fd = fd;
1988
1989 s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
1990 NULL, net_socket_cleanup, s);
1991 qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1992
1993 /* mcast: save bound address as dst */
1994 if (is_connected) s->dgram_dst=saddr;
1995
1996 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1997 "socket: fd=%d (%s mcast=%s:%d)",
1998 fd, is_connected? "cloned" : "",
1999 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2000 return s;
2001 }
2002
2003 static void net_socket_connect(void *opaque)
2004 {
2005 NetSocketState *s = opaque;
2006 qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2007 }
2008
2009 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2010 const char *model,
2011 const char *name,
2012 int fd, int is_connected)
2013 {
2014 NetSocketState *s;
2015 s = qemu_mallocz(sizeof(NetSocketState));
2016 s->fd = fd;
2017 s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
2018 NULL, net_socket_cleanup, s);
2019 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2020 "socket: fd=%d", fd);
2021 if (is_connected) {
2022 net_socket_connect(s);
2023 } else {
2024 qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2025 }
2026 return s;
2027 }
2028
2029 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2030 const char *model, const char *name,
2031 int fd, int is_connected)
2032 {
2033 int so_type = -1, optlen=sizeof(so_type);
2034
2035 if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2036 (socklen_t *)&optlen)< 0) {
2037 fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2038 return NULL;
2039 }
2040 switch(so_type) {
2041 case SOCK_DGRAM:
2042 return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2043 case SOCK_STREAM:
2044 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2045 default:
2046 /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2047 fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2048 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2049 }
2050 return NULL;
2051 }
2052
2053 static void net_socket_accept(void *opaque)
2054 {
2055 NetSocketListenState *s = opaque;
2056 NetSocketState *s1;
2057 struct sockaddr_in saddr;
2058 socklen_t len;
2059 int fd;
2060
2061 for(;;) {
2062 len = sizeof(saddr);
2063 fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2064 if (fd < 0 && errno != EINTR) {
2065 return;
2066 } else if (fd >= 0) {
2067 break;
2068 }
2069 }
2070 s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2071 if (!s1) {
2072 closesocket(fd);
2073 } else {
2074 snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2075 "socket: connection from %s:%d",
2076 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2077 }
2078 }
2079
2080 static int net_socket_listen_init(VLANState *vlan,
2081 const char *model,
2082 const char *name,
2083 const char *host_str)
2084 {
2085 NetSocketListenState *s;
2086 int fd, val, ret;
2087 struct sockaddr_in saddr;
2088
2089 if (parse_host_port(&saddr, host_str) < 0)
2090 return -1;
2091
2092 s = qemu_mallocz(sizeof(NetSocketListenState));
2093
2094 fd = socket(PF_INET, SOCK_STREAM, 0);
2095 if (fd < 0) {
2096 perror("socket");
2097 return -1;
2098 }
2099 socket_set_nonblock(fd);
2100
2101 /* allow fast reuse */
2102 val = 1;
2103 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2104
2105 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2106 if (ret < 0) {
2107 perror("bind");
2108 return -1;
2109 }
2110 ret = listen(fd, 0);
2111 if (ret < 0) {
2112 perror("listen");
2113 return -1;
2114 }
2115 s->vlan = vlan;
2116 s->model = qemu_strdup(model);
2117 s->name = name ? qemu_strdup(name) : NULL;
2118 s->fd = fd;
2119 qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2120 return 0;
2121 }
2122
2123 static int net_socket_connect_init(VLANState *vlan,
2124 const char *model,
2125 const char *name,
2126 const char *host_str)
2127 {
2128 NetSocketState *s;
2129 int fd, connected, ret, err;
2130 struct sockaddr_in saddr;
2131
2132 if (parse_host_port(&saddr, host_str) < 0)
2133 return -1;
2134
2135 fd = socket(PF_INET, SOCK_STREAM, 0);
2136 if (fd < 0) {
2137 perror("socket");
2138 return -1;
2139 }
2140 socket_set_nonblock(fd);
2141
2142 connected = 0;
2143 for(;;) {
2144 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2145 if (ret < 0) {
2146 err = socket_error();
2147 if (err == EINTR || err == EWOULDBLOCK) {
2148 } else if (err == EINPROGRESS) {
2149 break;
2150 #ifdef _WIN32
2151 } else if (err == WSAEALREADY) {
2152 break;
2153 #endif
2154 } else {
2155 perror("connect");
2156 closesocket(fd);
2157 return -1;
2158 }
2159 } else {
2160 connected = 1;
2161 break;
2162 }
2163 }
2164 s = net_socket_fd_init(vlan, model, name, fd, connected);
2165 if (!s)
2166 return -1;
2167 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2168 "socket: connect to %s:%d",
2169 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2170 return 0;
2171 }
2172
2173 static int net_socket_mcast_init(VLANState *vlan,
2174 const char *model,
2175 const char *name,
2176 const char *host_str)
2177 {
2178 NetSocketState *s;
2179 int fd;
2180 struct sockaddr_in saddr;
2181
2182 if (parse_host_port(&saddr, host_str) < 0)
2183 return -1;
2184
2185
2186 fd = net_socket_mcast_create(&saddr);
2187 if (fd < 0)
2188 return -1;
2189
2190 s = net_socket_fd_init(vlan, model, name, fd, 0);
2191 if (!s)
2192 return -1;
2193
2194 s->dgram_dst = saddr;
2195
2196 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2197 "socket: mcast=%s:%d",
2198 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2199 return 0;
2200
2201 }
2202
2203 typedef struct DumpState {
2204 VLANClientState *pcap_vc;
2205 int fd;
2206 int pcap_caplen;
2207 } DumpState;
2208
2209 #define PCAP_MAGIC 0xa1b2c3d4
2210
2211 struct pcap_file_hdr {
2212 uint32_t magic;
2213 uint16_t version_major;
2214 uint16_t version_minor;
2215 int32_t thiszone;
2216 uint32_t sigfigs;
2217 uint32_t snaplen;
2218 uint32_t linktype;
2219 };
2220
2221 struct pcap_sf_pkthdr {
2222 struct {
2223 int32_t tv_sec;
2224 int32_t tv_usec;
2225 } ts;
2226 uint32_t caplen;
2227 uint32_t len;
2228 };
2229
2230 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2231 {
2232 DumpState *s = vc->opaque;
2233 struct pcap_sf_pkthdr hdr;
2234 int64_t ts;
2235 int caplen;
2236
2237 /* Early return in case of previous error. */
2238 if (s->fd < 0) {
2239 return size;
2240 }
2241
2242 ts = muldiv64(qemu_get_clock(vm_clock), 1000000, get_ticks_per_sec());
2243 caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2244
2245 hdr.ts.tv_sec = ts / 1000000;
2246 hdr.ts.tv_usec = ts % 1000000;
2247 hdr.caplen = caplen;
2248 hdr.len = size;
2249 if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2250 write(s->fd, buf, caplen) != caplen) {
2251 qemu_log("-net dump write error - stop dump\n");
2252 close(s->fd);
2253 s->fd = -1;
2254 }
2255
2256 return size;
2257 }
2258
2259 static void net_dump_cleanup(VLANClientState *vc)
2260 {
2261 DumpState *s = vc->opaque;
2262
2263 close(s->fd);
2264 qemu_free(s);
2265 }
2266
2267 static int net_dump_init(VLANState *vlan, const char *device,
2268 const char *name, const char *filename, int len)
2269 {
2270 struct pcap_file_hdr hdr;
2271 DumpState *s;
2272
2273 s = qemu_malloc(sizeof(DumpState));
2274
2275 s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2276 if (s->fd < 0) {
2277 qemu_error("-net dump: can't open %s\n", filename);
2278 return -1;
2279 }
2280
2281 s->pcap_caplen = len;
2282
2283 hdr.magic = PCAP_MAGIC;
2284 hdr.version_major = 2;
2285 hdr.version_minor = 4;
2286 hdr.thiszone = 0;
2287 hdr.sigfigs = 0;
2288 hdr.snaplen = s->pcap_caplen;
2289 hdr.linktype = 1;
2290
2291 if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2292 qemu_error("-net dump write error: %s\n", strerror(errno));
2293 close(s->fd);
2294 qemu_free(s);
2295 return -1;
2296 }
2297
2298 s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2299 net_dump_cleanup, s);
2300 snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2301 "dump to %s (len=%d)", filename, len);
2302 return 0;
2303 }
2304
2305 /* find or alloc a new VLAN */
2306 VLANState *qemu_find_vlan(int id, int allocate)
2307 {
2308 VLANState **pvlan, *vlan;
2309 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2310 if (vlan->id == id)
2311 return vlan;
2312 }
2313 if (!allocate) {
2314 return NULL;
2315 }
2316 vlan = qemu_mallocz(sizeof(VLANState));
2317 vlan->id = id;
2318 QTAILQ_INIT(&vlan->send_queue);
2319 vlan->next = NULL;
2320 pvlan = &first_vlan;
2321 while (*pvlan != NULL)
2322 pvlan = &(*pvlan)->next;
2323 *pvlan = vlan;
2324 return vlan;
2325 }
2326
2327 static int nic_get_free_idx(void)
2328 {
2329 int index;
2330
2331 for (index = 0; index < MAX_NICS; index++)
2332 if (!nd_table[index].used)
2333 return index;
2334 return -1;
2335 }
2336
2337 int qemu_show_nic_models(const char *arg, const char *const *models)
2338 {
2339 int i;
2340
2341 if (!arg || strcmp(arg, "?"))
2342 return 0;
2343
2344 fprintf(stderr, "qemu: Supported NIC models: ");
2345 for (i = 0 ; models[i]; i++)
2346 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2347 return 1;
2348 }
2349
2350 void qemu_check_nic_model(NICInfo *nd, const char *model)
2351 {
2352 const char *models[2];
2353
2354 models[0] = model;
2355 models[1] = NULL;
2356
2357 if (qemu_show_nic_models(nd->model, models))
2358 exit(0);
2359 if (qemu_find_nic_model(nd, models, model) < 0)
2360 exit(1);
2361 }
2362
2363 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
2364 const char *default_model)
2365 {
2366 int i;
2367
2368 if (!nd->model)
2369 nd->model = qemu_strdup(default_model);
2370
2371 for (i = 0 ; models[i]; i++) {
2372 if (strcmp(nd->model, models[i]) == 0)
2373 return i;
2374 }
2375
2376 qemu_error("qemu: Unsupported NIC model: %s\n", nd->model);
2377 return -1;
2378 }
2379
2380 static int net_handle_fd_param(Monitor *mon, const char *param)
2381 {
2382 if (!qemu_isdigit(param[0])) {
2383 int fd;
2384
2385 fd = monitor_get_fd(mon, param);
2386 if (fd == -1) {
2387 qemu_error("No file descriptor named %s found", param);
2388 return -1;
2389 }
2390
2391 return fd;
2392 } else {
2393 return strtol(param, NULL, 0);
2394 }
2395 }
2396
2397 static int net_init_nic(QemuOpts *opts, Monitor *mon)
2398 {
2399 int idx;
2400 NICInfo *nd;
2401
2402 idx = nic_get_free_idx();
2403 if (idx == -1 || nb_nics >= MAX_NICS) {
2404 qemu_error("Too Many NICs\n");
2405 return -1;
2406 }
2407
2408 nd = &nd_table[idx];
2409
2410 memset(nd, 0, sizeof(*nd));
2411
2412 nd->vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
2413
2414 if (qemu_opts_id(opts)) {
2415 nd->id = qemu_strdup(qemu_opts_id(opts));
2416 }
2417 if (qemu_opt_get(opts, "name")) {
2418 nd->name = qemu_strdup(qemu_opt_get(opts, "name"));
2419 }
2420 if (qemu_opt_get(opts, "model")) {
2421 nd->model = qemu_strdup(qemu_opt_get(opts, "model"));
2422 }
2423 if (qemu_opt_get(opts, "addr")) {
2424 nd->devaddr = qemu_strdup(qemu_opt_get(opts, "addr"));
2425 }
2426
2427 nd->macaddr[0] = 0x52;
2428 nd->macaddr[1] = 0x54;
2429 nd->macaddr[2] = 0x00;
2430 nd->macaddr[3] = 0x12;
2431 nd->macaddr[4] = 0x34;
2432 nd->macaddr[5] = 0x56 + idx;
2433
2434 if (qemu_opt_get(opts, "macaddr") &&
2435 parse_macaddr(nd->macaddr, qemu_opt_get(opts, "macaddr")) < 0) {
2436 qemu_error("invalid syntax for ethernet address\n");
2437 return -1;
2438 }
2439
2440 nd->nvectors = qemu_opt_get_number(opts, "vectors", NIC_NVECTORS_UNSPECIFIED);
2441 if (nd->nvectors != NIC_NVECTORS_UNSPECIFIED &&
2442 (nd->nvectors < 0 || nd->nvectors > 0x7ffffff)) {
2443 qemu_error("invalid # of vectors: %d\n", nd->nvectors);
2444 return -1;
2445 }
2446
2447 nd->used = 1;
2448 nd->vlan->nb_guest_devs++;
2449 nb_nics++;
2450
2451 return idx;
2452 }
2453
2454 static int net_init_slirp_configs(const char *name, const char *value, void *opaque)
2455 {
2456 struct slirp_config_str *config;
2457
2458 if (strcmp(name, "hostfwd") != 0 && strcmp(name, "guestfwd") != 0) {
2459 return 0;
2460 }
2461
2462 config = qemu_mallocz(sizeof(*config));
2463
2464 pstrcpy(config->str, sizeof(config->str), value);
2465
2466 if (!strcmp(name, "hostfwd")) {
2467 config->flags = SLIRP_CFG_HOSTFWD;
2468 }
2469
2470 config->next = slirp_configs;
2471 slirp_configs = config;
2472
2473 return 0;
2474 }
2475
2476 static int net_init_slirp(QemuOpts *opts, Monitor *mon)
2477 {
2478 VLANState *vlan;
2479 struct slirp_config_str *config;
2480 const char *name;
2481 const char *vhost;
2482 const char *vhostname;
2483 const char *vdhcp_start;
2484 const char *vnamesrv;
2485 const char *tftp_export;
2486 const char *bootfile;
2487 const char *smb_export;
2488 const char *vsmbsrv;
2489 char *vnet = NULL;
2490 int restricted = 0;
2491 int ret;
2492
2493 vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
2494
2495 name = qemu_opt_get(opts, "name");
2496
2497 vhost = qemu_opt_get(opts, "host");
2498 vhostname = qemu_opt_get(opts, "hostname");
2499 vdhcp_start = qemu_opt_get(opts, "dhcpstart");
2500 vnamesrv = qemu_opt_get(opts, "dns");
2501 tftp_export = qemu_opt_get(opts, "tftp");
2502 bootfile = qemu_opt_get(opts, "bootfile");
2503 smb_export = qemu_opt_get(opts, "smb");
2504 vsmbsrv = qemu_opt_get(opts, "smbserver");
2505
2506 if (qemu_opt_get(opts, "ip")) {
2507 const char *ip = qemu_opt_get(opts, "ip");
2508 int l = strlen(ip) + strlen("/24") + 1;
2509
2510 vnet = qemu_malloc(l);
2511
2512 /* emulate legacy ip= parameter */
2513 pstrcpy(vnet, l, ip);
2514 pstrcat(vnet, l, "/24");
2515 }
2516
2517 if (qemu_opt_get(opts, "net")) {
2518 if (vnet) {
2519 qemu_free(vnet);
2520 }
2521 vnet = qemu_strdup(qemu_opt_get(opts, "net"));
2522 }
2523
2524 if (qemu_opt_get(opts, "restrict") &&
2525 qemu_opt_get(opts, "restrict")[0] == 'y') {
2526 restricted = 1;
2527 }
2528
2529 qemu_opt_foreach(opts, net_init_slirp_configs, NULL, 0);
2530
2531 ret = net_slirp_init(vlan, "user", name, restricted, vnet, vhost,
2532 vhostname, tftp_export, bootfile, vdhcp_start,
2533 vnamesrv, smb_export, vsmbsrv);
2534
2535 while (slirp_configs) {
2536 config = slirp_configs;
2537 slirp_configs = config->next;
2538 qemu_free(config);
2539 }
2540
2541 if (ret != -1) {
2542 vlan->nb_host_devs++;
2543 }
2544
2545 qemu_free(vnet);
2546
2547 return ret;
2548 }
2549
2550 #ifdef _WIN32
2551 static int net_init_tap_win32(QemuOpts *opts, Monitor *mon)
2552 {
2553 VLANState *vlan;
2554 const char *name;
2555 const char *ifname;
2556
2557 vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
2558
2559 name = qemu_opt_get(opts, "name");
2560 ifname = qemu_opt_get(opts, "ifname");
2561
2562 if (!ifname) {
2563 qemu_error("tap: no interface name\n");
2564 return -1;
2565 }
2566
2567 if (tap_win32_init(vlan, "tap", name, ifname) == -1) {
2568 return -1;
2569 }
2570
2571 vlan->nb_host_devs++;
2572
2573 return 0;
2574 }
2575 #elif !defined(_AIX)
2576 static int net_init_tap(QemuOpts *opts, Monitor *mon)
2577 {
2578 VLANState *vlan;
2579 const char *name;
2580 TAPState *s;
2581
2582 vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
2583
2584 name = qemu_opt_get(opts, "name");
2585
2586 if (qemu_opt_get(opts, "fd")) {
2587 int fd;
2588
2589 if (qemu_opt_get(opts, "ifname") ||
2590 qemu_opt_get(opts, "script") ||
2591 qemu_opt_get(opts, "downscript")) {
2592 qemu_error("ifname=, script= and downscript= is invalid with fd=\n");
2593 return -1;
2594 }
2595
2596 fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
2597 if (fd == -1) {
2598 return -1;
2599 }
2600
2601 fcntl(fd, F_SETFL, O_NONBLOCK);
2602
2603 s = net_tap_fd_init(vlan, "tap", name, fd);
2604 if (!s) {
2605 close(fd);
2606 }
2607 } else {
2608 const char *ifname, *script, *downscript;
2609
2610 ifname = qemu_opt_get(opts, "ifname");
2611 script = qemu_opt_get(opts, "script");
2612 downscript = qemu_opt_get(opts, "downscript");
2613
2614 if (!script) {
2615 script = DEFAULT_NETWORK_SCRIPT;
2616 }
2617 if (!downscript) {
2618 downscript = DEFAULT_NETWORK_DOWN_SCRIPT;
2619 }
2620
2621 s = net_tap_init(vlan, "tap", name, ifname, script, downscript);
2622 }
2623
2624 if (!s) {
2625 return -1;
2626 }
2627
2628 if (tap_set_sndbuf(s, opts) < 0) {
2629 return -1;
2630 }
2631
2632 vlan->nb_host_devs++;
2633
2634 return 0;
2635 }
2636 #endif
2637
2638 static int net_init_socket(QemuOpts *opts, Monitor *mon)
2639 {
2640 VLANState *vlan;
2641 const char *name;
2642
2643 vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
2644
2645 name = qemu_opt_get(opts, "name");
2646
2647 if (qemu_opt_get(opts, "fd")) {
2648 int fd;
2649
2650 if (qemu_opt_get(opts, "listen") ||
2651 qemu_opt_get(opts, "connect") ||
2652 qemu_opt_get(opts, "mcast")) {
2653 qemu_error("listen=, connect= and mcast= is invalid with fd=\n");
2654 return -1;
2655 }
2656
2657 fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
2658 if (fd == -1) {
2659 return -1;
2660 }
2661
2662 if (!net_socket_fd_init(vlan, "socket", name, fd, 1)) {
2663 close(fd);
2664 return -1;
2665 }
2666 } else if (qemu_opt_get(opts, "listen")) {
2667 const char *listen;
2668
2669 if (qemu_opt_get(opts, "fd") ||
2670 qemu_opt_get(opts, "connect") ||
2671 qemu_opt_get(opts, "mcast")) {
2672 qemu_error("fd=, connect= and mcast= is invalid with listen=\n");
2673 return -1;
2674 }
2675
2676 listen = qemu_opt_get(opts, "listen");
2677
2678 if (net_socket_listen_init(vlan, "socket", name, listen) == -1) {
2679 return -1;
2680 }
2681 } else if (qemu_opt_get(opts, "connect")) {
2682 const char *connect;
2683
2684 if (qemu_opt_get(opts, "fd") ||
2685 qemu_opt_get(opts, "listen") ||
2686 qemu_opt_get(opts, "mcast")) {
2687 qemu_error("fd=, listen= and mcast= is invalid with connect=\n");
2688 return -1;
2689 }
2690
2691 connect = qemu_opt_get(opts, "connect");
2692
2693 if (net_socket_connect_init(vlan, "socket", name, connect) == -1) {
2694 return -1;
2695 }
2696 } else if (qemu_opt_get(opts, "mcast")) {
2697 const char *mcast;
2698
2699 if (qemu_opt_get(opts, "fd") ||
2700 qemu_opt_get(opts, "connect") ||
2701 qemu_opt_get(opts, "listen")) {
2702 qemu_error("fd=, connect= and listen= is invalid with mcast=\n");
2703 return -1;
2704 }
2705
2706 mcast = qemu_opt_get(opts, "mcast");
2707
2708 if (net_socket_mcast_init(vlan, "socket", name, mcast) == -1) {
2709 return -1;
2710 }
2711 } else {
2712 qemu_error("-socket requires fd=, listen=, connect= or mcast=\n");
2713 return -1;
2714 }
2715
2716 vlan->nb_host_devs++;
2717
2718 return 0;
2719 }
2720
2721 #ifdef CONFIG_VDE
2722 static int net_init_vde(QemuOpts *opts, Monitor *mon)
2723 {
2724 VLANState *vlan;
2725 const char *name;
2726 const char *sock;
2727 const char *group;
2728 int port, mode;
2729
2730 vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
2731
2732 name = qemu_opt_get(opts, "name");
2733 sock = qemu_opt_get(opts, "sock");
2734 group = qemu_opt_get(opts, "group");
2735
2736 port = qemu_opt_get_number(opts, "port", 0);
2737 mode = qemu_opt_get_number(opts, "mode", 0700);
2738
2739 if (net_vde_init(vlan, "vde", name, sock, port, group, mode) == -1) {
2740 return -1;
2741 }
2742
2743 vlan->nb_host_devs++;
2744
2745 return 0;
2746 }
2747 #endif
2748
2749 static int net_init_dump(QemuOpts *opts, Monitor *mon)
2750 {
2751 VLANState *vlan;
2752 int len;
2753 const char *file;
2754 const char *name;
2755 char def_file[128];
2756
2757 vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
2758
2759 name = qemu_opt_get(opts, "name");
2760
2761 file = qemu_opt_get(opts, "file");
2762 if (!file) {
2763 snprintf(def_file, sizeof(def_file), "qemu-vlan%d.pcap", vlan->id);
2764 file = def_file;
2765 }
2766
2767 len = qemu_opt_get_size(opts, "len", 65536);
2768
2769 return net_dump_init(vlan, "dump", name, file, len);
2770 }
2771
2772 #define NET_COMMON_PARAMS_DESC \
2773 { \
2774 .name = "type", \
2775 .type = QEMU_OPT_STRING, \
2776 .help = "net client type (nic, tap etc.)", \
2777 }, { \
2778 .name = "vlan", \
2779 .type = QEMU_OPT_NUMBER, \
2780 .help = "vlan number", \
2781 }, { \
2782 .name = "name", \
2783 .type = QEMU_OPT_STRING, \
2784 .help = "identifier for monitor commands", \
2785 }
2786
2787 typedef int (*net_client_init_func)(QemuOpts *opts, Monitor *mon);
2788
2789 /* magic number, but compiler will warn if too small */
2790 #define NET_MAX_DESC 20
2791
2792 static struct {
2793 const char *type;
2794 net_client_init_func init;
2795 QemuOptDesc desc[NET_MAX_DESC];
2796 } net_client_types[] = {
2797 {
2798 .type = "none",
2799 .desc = {
2800 NET_COMMON_PARAMS_DESC,
2801 { /* end of list */ }
2802 },
2803 }, {
2804 .type = "nic",
2805 .init = net_init_nic,
2806 .desc = {
2807 NET_COMMON_PARAMS_DESC,
2808 {
2809 .name = "macaddr",
2810 .type = QEMU_OPT_STRING,
2811 .help = "MAC address",
2812 }, {
2813 .name = "model",
2814 .type = QEMU_OPT_STRING,
2815 .help = "device model (e1000, rtl8139, virtio etc.)",
2816 }, {
2817 .name = "addr",
2818 .type = QEMU_OPT_STRING,
2819 .help = "PCI device address",
2820 }, {
2821 .name = "vectors",
2822 .type = QEMU_OPT_NUMBER,
2823 .help = "number of MSI-x vectors, 0 to disable MSI-X",
2824 },
2825 { /* end of list */ }
2826 },
2827 #ifdef CONFIG_SLIRP
2828 }, {
2829 .type = "user",
2830 .init = net_init_slirp,
2831 .desc = {
2832 NET_COMMON_PARAMS_DESC,
2833 {
2834 .name = "hostname",
2835 .type = QEMU_OPT_STRING,
2836 .help = "client hostname reported by the builtin DHCP server",
2837 }, {
2838 .name = "restrict",
2839 .type = QEMU_OPT_STRING,
2840 .help = "isolate the guest from the host (y|yes|n|no)",
2841 }, {
2842 .name = "ip",
2843 .type = QEMU_OPT_STRING,
2844 .help = "legacy parameter, use net= instead",
2845 }, {
2846 .name = "net",
2847 .type = QEMU_OPT_STRING,
2848 .help = "IP address and optional netmask",
2849 }, {
2850 .name = "host",
2851 .type = QEMU_OPT_STRING,
2852 .help = "guest-visible address of the host",
2853 }, {
2854 .name = "tftp",
2855 .type = QEMU_OPT_STRING,
2856 .help = "root directory of the built-in TFTP server",
2857 }, {
2858 .name = "bootfile",
2859 .type = QEMU_OPT_STRING,
2860 .help = "BOOTP filename, for use with tftp=",
2861 }, {
2862 .name = "dhcpstart",
2863 .type = QEMU_OPT_STRING,
2864 .help = "the first of the 16 IPs the built-in DHCP server can assign",
2865 }, {
2866 .name = "dns",
2867 .type = QEMU_OPT_STRING,
2868 .help = "guest-visible address of the virtual nameserver",
2869 }, {
2870 .name = "smb",
2871 .type = QEMU_OPT_STRING,
2872 .help = "root directory of the built-in SMB server",
2873 }, {
2874 .name = "smbserver",
2875 .type = QEMU_OPT_STRING,
2876 .help = "IP address of the built-in SMB server",
2877 }, {
2878 .name = "hostfwd",
2879 .type = QEMU_OPT_STRING,
2880 .help = "guest port number to forward incoming TCP or UDP connections",
2881 }, {
2882 .name = "guestfwd",
2883 .type = QEMU_OPT_STRING,
2884 .help = "IP address and port to forward guest TCP connections",
2885 },
2886 { /* end of list */ }
2887 },
2888 #endif
2889 #ifdef _WIN32
2890 }, {
2891 .type = "tap",
2892 .init = net_init_tap_win32,
2893 .desc = {
2894 NET_COMMON_PARAMS_DESC,
2895 {
2896 .name = "ifname",
2897 .type = QEMU_OPT_STRING,
2898 .help = "interface name",
2899 },
2900 { /* end of list */ }
2901 },
2902 #elif !defined(_AIX)
2903 }, {
2904 .type = "tap",
2905 .init = net_init_tap,
2906 .desc = {
2907 NET_COMMON_PARAMS_DESC,
2908 {
2909 .name = "fd",
2910 .type = QEMU_OPT_STRING,
2911 .help = "file descriptor of an already opened tap",
2912 }, {
2913 .name = "ifname",
2914 .type = QEMU_OPT_STRING,
2915 .help = "interface name",
2916 }, {
2917 .name = "script",
2918 .type = QEMU_OPT_STRING,
2919 .help = "script to initialize the interface",
2920 }, {
2921 .name = "downscript",
2922 .type = QEMU_OPT_STRING,
2923 .help = "script to shut down the interface",
2924 #ifdef TUNSETSNDBUF
2925 }, {
2926 .name = "sndbuf",
2927 .type = QEMU_OPT_SIZE,
2928 .help = "send buffer limit"
2929 #endif
2930 },
2931 { /* end of list */ }
2932 },
2933 #endif
2934 }, {
2935 .type = "socket",
2936 .init = net_init_socket,
2937 .desc = {
2938 NET_COMMON_PARAMS_DESC,
2939 {
2940 .name = "fd",
2941 .type = QEMU_OPT_STRING,
2942 .help = "file descriptor of an already opened socket",
2943 }, {
2944 .name = "listen",
2945 .type = QEMU_OPT_STRING,
2946 .help = "port number, and optional hostname, to listen on",
2947 }, {
2948 .name = "connect",
2949 .type = QEMU_OPT_STRING,
2950 .help = "port number, and optional hostname, to connect to",
2951 }, {
2952 .name = "mcast",
2953 .type = QEMU_OPT_STRING,
2954 .help = "UDP multicast address and port number",
2955 },
2956 { /* end of list */ }
2957 },
2958 #ifdef CONFIG_VDE
2959 }, {
2960 .type = "vde",
2961 .init = net_init_vde,
2962 .desc = {
2963 NET_COMMON_PARAMS_DESC,
2964 {
2965 .name = "sock",
2966 .type = QEMU_OPT_STRING,
2967 .help = "socket path",
2968 }, {
2969 .name = "port",
2970 .type = QEMU_OPT_NUMBER,
2971 .help = "port number",
2972 }, {
2973 .name = "group",
2974 .type = QEMU_OPT_STRING,
2975 .help = "group owner of socket",
2976 }, {
2977 .name = "mode",
2978 .type = QEMU_OPT_NUMBER,
2979 .help = "permissions for socket",
2980 },
2981 { /* end of list */ }
2982 },
2983 #endif
2984 }, {
2985 .type = "dump",
2986 .init = net_init_dump,
2987 .desc = {
2988 NET_COMMON_PARAMS_DESC,
2989 {
2990 .name = "len",
2991 .type = QEMU_OPT_SIZE,
2992 .help = "per-packet size limit (64k default)",
2993 }, {
2994 .name = "file",
2995 .type = QEMU_OPT_STRING,
2996 .help = "dump file path (default is qemu-vlan0.pcap)",
2997 },
2998 { /* end of list */ }
2999 },
3000 },
3001 { /* end of list */ }
3002 };
3003
3004 int net_client_init(Monitor *mon, QemuOpts *opts)
3005 {
3006 const char *type;
3007 int i;
3008
3009 type = qemu_opt_get(opts, "type");
3010 if (!type) {
3011 qemu_error("No type specified for -net\n");
3012 return -1;
3013 }
3014
3015 for (i = 0; net_client_types[i].type != NULL; i++) {
3016 if (!strcmp(net_client_types[i].type, type)) {
3017 if (qemu_opts_validate(opts, &net_client_types[i].desc[0]) == -1) {
3018 return -1;
3019 }
3020
3021 if (net_client_types[i].init) {
3022 return net_client_types[i].init(opts, NULL);
3023 } else {
3024 return 0;
3025 }
3026 }
3027 }
3028
3029 qemu_error("Invalid -net type '%s'\n", type);
3030 return -1;
3031 }
3032
3033 void net_client_uninit(NICInfo *nd)
3034 {
3035 nd->vlan->nb_guest_devs--;
3036 nb_nics--;
3037
3038 qemu_free(nd->model);
3039 qemu_free(nd->name);
3040 qemu_free(nd->devaddr);
3041 qemu_free(nd->id);
3042
3043 nd->used = 0;
3044 }
3045
3046 static int net_host_check_device(const char *device)
3047 {
3048 int i;
3049 const char *valid_param_list[] = { "tap", "socket", "dump"
3050 #ifdef CONFIG_SLIRP
3051 ,"user"
3052 #endif
3053 #ifdef CONFIG_VDE
3054 ,"vde"
3055 #endif
3056 };
3057 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
3058 if (!strncmp(valid_param_list[i], device,
3059 strlen(valid_param_list[i])))
3060 return 1;
3061 }
3062
3063 return 0;
3064 }
3065
3066 void net_host_device_add(Monitor *mon, const QDict *qdict)
3067 {
3068 const char *device = qdict_get_str(qdict, "device");
3069 const char *opts_str = qdict_get_try_str(qdict, "opts");
3070 QemuOpts *opts;
3071
3072 if (!net_host_check_device(device)) {
3073 monitor_printf(mon, "invalid host network device %s\n", device);
3074 return;
3075 }
3076
3077 opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", NULL);
3078 if (!opts) {
3079 monitor_printf(mon, "parsing network options '%s' failed\n",
3080 opts_str ? opts_str : "");
3081 return;
3082 }
3083
3084 qemu_opt_set(opts, "type", device);
3085
3086 if (net_client_init(mon, opts) < 0) {
3087 monitor_printf(mon, "adding host network device %s failed\n", device);
3088 }
3089 }
3090
3091 void net_host_device_remove(Monitor *mon, const QDict *qdict)
3092 {
3093 VLANClientState *vc;
3094 int vlan_id = qdict_get_int(qdict, "vlan_id");
3095 const char *device = qdict_get_str(qdict, "device");
3096
3097 vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
3098 if (!vc) {
3099 return;
3100 }
3101 if (!net_host_check_device(vc->model)) {
3102 monitor_printf(mon, "invalid host network device %s\n", device);
3103 return;
3104 }
3105 qemu_del_vlan_client(vc);
3106 }
3107
3108 void net_set_boot_mask(int net_boot_mask)
3109 {
3110 int i;
3111
3112 /* Only the first four NICs may be bootable */
3113 net_boot_mask = net_boot_mask & 0xF;
3114
3115 for (i = 0; i < nb_nics; i++) {
3116 if (net_boot_mask & (1 << i)) {
3117 nd_table[i].bootable = 1;
3118 net_boot_mask &= ~(1 << i);
3119 }
3120 }
3121
3122 if (net_boot_mask) {
3123 fprintf(stderr, "Cannot boot from non-existent NIC\n");
3124 exit(1);
3125 }
3126 }
3127
3128 void do_info_network(Monitor *mon)
3129 {
3130 VLANState *vlan;
3131 VLANClientState *vc;
3132
3133 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
3134 monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
3135 for(vc = vlan->first_client; vc != NULL; vc = vc->next)
3136 monitor_printf(mon, " %s: %s\n", vc->name, vc->info_str);
3137 }
3138 }
3139
3140 void do_set_link(Monitor *mon, const QDict *qdict)
3141 {
3142 VLANState *vlan;
3143 VLANClientState *vc = NULL;
3144 const char *name = qdict_get_str(qdict, "name");
3145 const char *up_or_down = qdict_get_str(qdict, "up_or_down");
3146
3147 for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
3148 for (vc = vlan->first_client; vc != NULL; vc = vc->next)
3149 if (strcmp(vc->name, name) == 0)
3150 goto done;
3151 done:
3152
3153 if (!vc) {
3154 monitor_printf(mon, "could not find network device '%s'\n", name);
3155 return;
3156 }
3157
3158 if (strcmp(up_or_down, "up") == 0)
3159 vc->link_down = 0;
3160 else if (strcmp(up_or_down, "down") == 0)
3161 vc->link_down = 1;
3162 else
3163 monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
3164 "valid\n", up_or_down);
3165
3166 if (vc->link_status_changed)
3167 vc->link_status_changed(vc);
3168 }
3169
3170 void net_cleanup(void)
3171 {
3172 VLANState *vlan;
3173
3174 /* close network clients */
3175 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
3176 VLANClientState *vc = vlan->first_client;
3177
3178 while (vc) {
3179 VLANClientState *next = vc->next;
3180
3181 qemu_del_vlan_client(vc);
3182
3183 vc = next;
3184 }
3185 }
3186 }
3187
3188 static void net_check_clients(void)
3189 {
3190 VLANState *vlan;
3191
3192 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
3193 if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
3194 continue;
3195 if (vlan->nb_guest_devs == 0)
3196 fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
3197 if (vlan->nb_host_devs == 0)
3198 fprintf(stderr,
3199 "Warning: vlan %d is not connected to host network\n",
3200 vlan->id);
3201 }
3202 }
3203
3204 static int net_init_client(QemuOpts *opts, void *dummy)
3205 {
3206 return net_client_init(NULL, opts);
3207 }
3208
3209 int net_init_clients(void)
3210 {
3211 if (QTAILQ_EMPTY(&qemu_net_opts.head)) {
3212 /* if no clients, we use a default config */
3213 qemu_opts_set(&qemu_net_opts, NULL, "type", "nic");
3214 #ifdef CONFIG_SLIRP
3215 qemu_opts_set(&qemu_net_opts, NULL, "type", "user");
3216 #endif
3217 }
3218
3219 if (qemu_opts_foreach(&qemu_net_opts, net_init_client, NULL, 1) == -1) {
3220 return -1;
3221 }
3222
3223 net_check_clients();
3224
3225 return 0;
3226 }
3227
3228 int net_client_parse(const char *optarg)
3229 {
3230 /* handle legacy -net channel,port:chr */
3231 if (!strncmp(optarg, "channel,", strlen("channel,"))) {
3232 int ret;
3233
3234 optarg += strlen("channel,");
3235
3236 if (QTAILQ_EMPTY(&slirp_stacks)) {
3237 struct slirp_config_str *config;
3238
3239 config = qemu_malloc(sizeof(*config));
3240 pstrcpy(config->str, sizeof(config->str), optarg);
3241 config->flags = SLIRP_CFG_LEGACY;
3242 config->next = slirp_configs;
3243 slirp_configs = config;
3244 ret = 0;
3245 } else {
3246 ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);
3247 }
3248
3249 return ret;
3250 }
3251
3252 if (!qemu_opts_parse(&qemu_net_opts, optarg, "type")) {
3253 return -1;
3254 }
3255
3256 return 0;
3257 }
Anthony Liguori's QEMU queue