Merge branch 'upstream-merge'
[qemu-kvm/markmc.git] / net.c
blobfeb302234ebc524713a3de46e840958cde231393
1 /*
2 * QEMU System Emulator
4 * Copyright (c) 2003-2008 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
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>
32 /* Needed early for CONFIG_BSD etc. */
33 #include "config-host.h"
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 "tap-linux.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>
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"
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
96 #if defined(__OpenBSD__)
97 #include <util.h>
98 #endif
100 #if defined(CONFIG_VDE)
101 #include <libvdeplug.h>
102 #endif
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"
115 #include "slirp/libslirp.h"
117 static QTAILQ_HEAD(, VLANState) vlans;
118 static QTAILQ_HEAD(, VLANClientState) non_vlan_clients;
120 /***********************************************************/
121 /* network device redirectors */
123 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
124 static void hex_dump(FILE *f, const uint8_t *buf, int size)
126 int len, i, j, c;
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, " ");
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);
146 fprintf(f, "\n");
149 #endif
151 static int parse_macaddr(uint8_t *macaddr, const char *p)
153 int i;
154 char *last_char;
155 long int offset;
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++;
177 return 0;
180 return -1;
183 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
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';
199 *pp = p1;
200 return 0;
203 int parse_host_src_port(struct sockaddr_in *haddr,
204 struct sockaddr_in *saddr,
205 const char *input_str)
207 char *str = strdup(input_str);
208 char *host_str = str;
209 char *src_str;
210 const char *src_str2;
211 char *ptr;
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".
218 if ((ptr = strchr(str,',')))
219 *ptr = '\0';
221 if ((src_str = strchr(input_str,'@'))) {
222 *src_str = '\0';
223 src_str++;
226 if (parse_host_port(haddr, host_str) < 0)
227 goto fail;
229 src_str2 = src_str;
230 if (!src_str || *src_str == '\0')
231 src_str2 = ":0";
233 if (parse_host_port(saddr, src_str2) < 0)
234 goto fail;
236 free(str);
237 return(0);
239 fail:
240 free(str);
241 return -1;
244 int parse_host_port(struct sockaddr_in *saddr, const char *str)
246 char buf[512];
247 struct hostent *he;
248 const char *p, *r;
249 int port;
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;
267 port = strtol(p, (char **)&r, 0);
268 if (r == p)
269 return -1;
270 saddr->sin_port = htons(port);
271 return 0;
274 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
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]);
283 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
285 static int index = 0;
286 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
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++;
298 static char *assign_name(VLANClientState *vc1, const char *model)
300 VLANState *vlan;
301 char buf[256];
302 int id = 0;
304 QTAILQ_FOREACH(vlan, &vlans, next) {
305 VLANClientState *vc;
307 QTAILQ_FOREACH(vc, &vlan->clients, next) {
308 if (vc != vc1 && strcmp(vc->model, model) == 0) {
309 id++;
314 snprintf(buf, sizeof(buf), "%s.%d", model, id);
316 return qemu_strdup(buf);
319 static ssize_t qemu_deliver_packet(VLANClientState *sender,
320 unsigned flags,
321 const uint8_t *data,
322 size_t size,
323 void *opaque);
324 static ssize_t qemu_deliver_packet_iov(VLANClientState *sender,
325 unsigned flags,
326 const struct iovec *iov,
327 int iovcnt,
328 void *opaque);
330 VLANClientState *qemu_new_vlan_client(net_client_type type,
331 VLANState *vlan,
332 VLANClientState *peer,
333 const char *model,
334 const char *name,
335 NetCanReceive *can_receive,
336 NetReceive *receive,
337 NetReceive *receive_raw,
338 NetReceiveIOV *receive_iov,
339 NetCleanup *cleanup,
340 void *opaque)
342 VLANClientState *vc;
344 vc = qemu_mallocz(sizeof(VLANClientState));
346 vc->type = type;
347 vc->model = qemu_strdup(model);
348 if (name)
349 vc->name = qemu_strdup(name);
350 else
351 vc->name = assign_name(vc, model);
352 vc->can_receive = can_receive;
353 vc->receive = receive;
354 vc->receive_raw = receive_raw;
355 vc->receive_iov = receive_iov;
356 vc->cleanup = cleanup;
357 vc->opaque = opaque;
359 if (vlan) {
360 assert(!peer);
361 vc->vlan = vlan;
362 QTAILQ_INSERT_TAIL(&vc->vlan->clients, vc, next);
363 } else {
364 if (peer) {
365 vc->peer = peer;
366 peer->peer = vc;
368 QTAILQ_INSERT_TAIL(&non_vlan_clients, vc, next);
370 vc->send_queue = qemu_new_net_queue(qemu_deliver_packet,
371 qemu_deliver_packet_iov,
372 vc);
375 return vc;
378 void qemu_del_vlan_client(VLANClientState *vc)
380 if (vc->vlan) {
381 QTAILQ_REMOVE(&vc->vlan->clients, vc, next);
382 } else {
383 if (vc->send_queue) {
384 qemu_del_net_queue(vc->send_queue);
386 QTAILQ_REMOVE(&non_vlan_clients, vc, next);
387 if (vc->peer) {
388 vc->peer->peer = NULL;
392 if (vc->cleanup) {
393 vc->cleanup(vc);
396 qemu_free(vc->name);
397 qemu_free(vc->model);
398 qemu_free(vc);
401 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
403 VLANClientState *vc;
405 QTAILQ_FOREACH(vc, &vlan->clients, next) {
406 if (vc->opaque == opaque) {
407 return vc;
411 return NULL;
414 static VLANClientState *
415 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
416 const char *client_str)
418 VLANState *vlan;
419 VLANClientState *vc;
421 vlan = qemu_find_vlan(vlan_id, 0);
422 if (!vlan) {
423 monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
424 return NULL;
427 QTAILQ_FOREACH(vc, &vlan->clients, next) {
428 if (!strcmp(vc->name, client_str)) {
429 break;
432 if (!vc) {
433 monitor_printf(mon, "can't find device %s on VLAN %d\n",
434 client_str, vlan_id);
437 return vc;
440 int qemu_can_send_packet(VLANClientState *sender)
442 VLANState *vlan = sender->vlan;
443 VLANClientState *vc;
445 if (sender->peer) {
446 if (!sender->peer->can_receive ||
447 sender->peer->can_receive(sender->peer)) {
448 return 1;
449 } else {
450 return 0;
454 if (!sender->vlan) {
455 return 1;
458 QTAILQ_FOREACH(vc, &vlan->clients, next) {
459 if (vc == sender) {
460 continue;
463 /* no can_receive() handler, they can always receive */
464 if (!vc->can_receive || vc->can_receive(vc)) {
465 return 1;
468 return 0;
471 static ssize_t qemu_deliver_packet(VLANClientState *sender,
472 unsigned flags,
473 const uint8_t *data,
474 size_t size,
475 void *opaque)
477 VLANClientState *vc = opaque;
479 if (vc->link_down) {
480 return size;
483 if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->receive_raw)
484 return vc->receive_raw(vc, data, size);
485 else
486 return vc->receive(vc, data, size);
489 static ssize_t qemu_vlan_deliver_packet(VLANClientState *sender,
490 unsigned flags,
491 const uint8_t *buf,
492 size_t size,
493 void *opaque)
495 VLANState *vlan = opaque;
496 VLANClientState *vc;
497 int ret = -1;
499 QTAILQ_FOREACH(vc, &vlan->clients, next) {
500 ssize_t len;
502 if (vc == sender) {
503 continue;
506 if (vc->link_down) {
507 ret = size;
508 continue;
511 if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->receive_raw)
512 len = vc->receive_raw(vc, buf, size);
513 else
514 len = vc->receive(vc, buf, size);
516 ret = (ret >= 0) ? ret : len;
519 return ret;
522 void qemu_purge_queued_packets(VLANClientState *vc)
524 NetQueue *queue;
526 if (!vc->peer && !vc->vlan) {
527 return;
530 if (vc->peer) {
531 queue = vc->peer->send_queue;
532 } else {
533 queue = vc->vlan->send_queue;
536 qemu_net_queue_purge(queue, vc);
539 void qemu_flush_queued_packets(VLANClientState *vc)
541 NetQueue *queue;
543 if (vc->vlan) {
544 queue = vc->vlan->send_queue;
545 } else {
546 queue = vc->send_queue;
549 qemu_net_queue_flush(queue);
552 static ssize_t qemu_send_packet_async_with_flags(VLANClientState *sender,
553 unsigned flags,
554 const uint8_t *buf, int size,
555 NetPacketSent *sent_cb)
557 NetQueue *queue;
559 #ifdef DEBUG_NET
560 printf("qemu_send_packet_async:\n");
561 hex_dump(stdout, buf, size);
562 #endif
564 if (sender->link_down || (!sender->peer && !sender->vlan)) {
565 return size;
568 if (sender->peer) {
569 queue = sender->peer->send_queue;
570 } else {
571 queue = sender->vlan->send_queue;
574 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
577 ssize_t qemu_send_packet_async(VLANClientState *sender,
578 const uint8_t *buf, int size,
579 NetPacketSent *sent_cb)
581 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
582 buf, size, sent_cb);
585 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
587 qemu_send_packet_async(vc, buf, size, NULL);
590 ssize_t qemu_send_packet_raw(VLANClientState *vc, const uint8_t *buf, int size)
592 return qemu_send_packet_async_with_flags(vc, QEMU_NET_PACKET_FLAG_RAW,
593 buf, size, NULL);
596 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
597 int iovcnt)
599 uint8_t buffer[4096];
600 size_t offset = 0;
601 int i;
603 for (i = 0; i < iovcnt; i++) {
604 size_t len;
606 len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
607 memcpy(buffer + offset, iov[i].iov_base, len);
608 offset += len;
611 return vc->receive(vc, buffer, offset);
614 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
616 size_t offset = 0;
617 int i;
619 for (i = 0; i < iovcnt; i++)
620 offset += iov[i].iov_len;
621 return offset;
624 static ssize_t qemu_deliver_packet_iov(VLANClientState *sender,
625 unsigned flags,
626 const struct iovec *iov,
627 int iovcnt,
628 void *opaque)
630 VLANClientState *vc = opaque;
632 if (vc->link_down) {
633 return calc_iov_length(iov, iovcnt);
636 if (vc->receive_iov) {
637 return vc->receive_iov(vc, iov, iovcnt);
638 } else {
639 return vc_sendv_compat(vc, iov, iovcnt);
643 static ssize_t qemu_vlan_deliver_packet_iov(VLANClientState *sender,
644 unsigned flags,
645 const struct iovec *iov,
646 int iovcnt,
647 void *opaque)
649 VLANState *vlan = opaque;
650 VLANClientState *vc;
651 ssize_t ret = -1;
653 QTAILQ_FOREACH(vc, &vlan->clients, next) {
654 ssize_t len;
656 if (vc == sender) {
657 continue;
660 if (vc->link_down) {
661 ret = calc_iov_length(iov, iovcnt);
662 continue;
665 assert(!(flags & QEMU_NET_PACKET_FLAG_RAW));
667 if (vc->receive_iov) {
668 len = vc->receive_iov(vc, iov, iovcnt);
669 } else {
670 len = vc_sendv_compat(vc, iov, iovcnt);
673 ret = (ret >= 0) ? ret : len;
676 return ret;
679 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
680 const struct iovec *iov, int iovcnt,
681 NetPacketSent *sent_cb)
683 NetQueue *queue;
685 if (sender->link_down || (!sender->peer && !sender->vlan)) {
686 return calc_iov_length(iov, iovcnt);
689 if (sender->peer) {
690 queue = sender->peer->send_queue;
691 } else {
692 queue = sender->vlan->send_queue;
695 return qemu_net_queue_send_iov(queue, sender,
696 QEMU_NET_PACKET_FLAG_NONE,
697 iov, iovcnt, sent_cb);
700 ssize_t
701 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
703 return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
706 #if defined(CONFIG_SLIRP)
708 /* slirp network adapter */
710 #define SLIRP_CFG_HOSTFWD 1
711 #define SLIRP_CFG_LEGACY 2
713 struct slirp_config_str {
714 struct slirp_config_str *next;
715 int flags;
716 char str[1024];
717 int legacy_format;
720 typedef struct SlirpState {
721 QTAILQ_ENTRY(SlirpState) entry;
722 VLANClientState *vc;
723 Slirp *slirp;
724 #ifndef _WIN32
725 char smb_dir[128];
726 #endif
727 } SlirpState;
729 static struct slirp_config_str *slirp_configs;
730 const char *legacy_tftp_prefix;
731 const char *legacy_bootp_filename;
732 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
733 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
735 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
736 int legacy_format);
737 static int slirp_guestfwd(SlirpState *s, const char *config_str,
738 int legacy_format);
740 #ifndef _WIN32
741 static const char *legacy_smb_export;
743 static int slirp_smb(SlirpState *s, const char *exported_dir,
744 struct in_addr vserver_addr);
745 static void slirp_smb_cleanup(SlirpState *s);
746 #else
747 static inline void slirp_smb_cleanup(SlirpState *s) { }
748 #endif
750 int slirp_can_output(void *opaque)
752 SlirpState *s = opaque;
754 return qemu_can_send_packet(s->vc);
757 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
759 SlirpState *s = opaque;
761 #ifdef DEBUG_SLIRP
762 printf("slirp output:\n");
763 hex_dump(stdout, pkt, pkt_len);
764 #endif
765 qemu_send_packet(s->vc, pkt, pkt_len);
768 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
770 SlirpState *s = vc->opaque;
772 #ifdef DEBUG_SLIRP
773 printf("slirp input:\n");
774 hex_dump(stdout, buf, size);
775 #endif
776 slirp_input(s->slirp, buf, size);
777 return size;
780 static void net_slirp_cleanup(VLANClientState *vc)
782 SlirpState *s = vc->opaque;
784 slirp_cleanup(s->slirp);
785 slirp_smb_cleanup(s);
786 QTAILQ_REMOVE(&slirp_stacks, s, entry);
787 qemu_free(s);
790 static int net_slirp_init(VLANState *vlan, const char *model,
791 const char *name, int restricted,
792 const char *vnetwork, const char *vhost,
793 const char *vhostname, const char *tftp_export,
794 const char *bootfile, const char *vdhcp_start,
795 const char *vnameserver, const char *smb_export,
796 const char *vsmbserver)
798 /* default settings according to historic slirp */
799 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
800 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
801 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
802 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
803 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
804 #ifndef _WIN32
805 struct in_addr smbsrv = { .s_addr = 0 };
806 #endif
807 SlirpState *s;
808 char buf[20];
809 uint32_t addr;
810 int shift;
811 char *end;
812 struct slirp_config_str *config;
814 if (!tftp_export) {
815 tftp_export = legacy_tftp_prefix;
817 if (!bootfile) {
818 bootfile = legacy_bootp_filename;
821 if (vnetwork) {
822 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
823 if (!inet_aton(vnetwork, &net)) {
824 return -1;
826 addr = ntohl(net.s_addr);
827 if (!(addr & 0x80000000)) {
828 mask.s_addr = htonl(0xff000000); /* class A */
829 } else if ((addr & 0xfff00000) == 0xac100000) {
830 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
831 } else if ((addr & 0xc0000000) == 0x80000000) {
832 mask.s_addr = htonl(0xffff0000); /* class B */
833 } else if ((addr & 0xffff0000) == 0xc0a80000) {
834 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
835 } else if ((addr & 0xffff0000) == 0xc6120000) {
836 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
837 } else if ((addr & 0xe0000000) == 0xe0000000) {
838 mask.s_addr = htonl(0xffffff00); /* class C */
839 } else {
840 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
842 } else {
843 if (!inet_aton(buf, &net)) {
844 return -1;
846 shift = strtol(vnetwork, &end, 10);
847 if (*end != '\0') {
848 if (!inet_aton(vnetwork, &mask)) {
849 return -1;
851 } else if (shift < 4 || shift > 32) {
852 return -1;
853 } else {
854 mask.s_addr = htonl(0xffffffff << (32 - shift));
857 net.s_addr &= mask.s_addr;
858 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
859 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
860 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
863 if (vhost && !inet_aton(vhost, &host)) {
864 return -1;
866 if ((host.s_addr & mask.s_addr) != net.s_addr) {
867 return -1;
870 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
871 return -1;
873 if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
874 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
875 return -1;
878 if (vnameserver && !inet_aton(vnameserver, &dns)) {
879 return -1;
881 if ((dns.s_addr & mask.s_addr) != net.s_addr ||
882 dns.s_addr == host.s_addr) {
883 return -1;
886 #ifndef _WIN32
887 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
888 return -1;
890 #endif
892 s = qemu_mallocz(sizeof(SlirpState));
893 s->slirp = slirp_init(restricted, net, mask, host, vhostname,
894 tftp_export, bootfile, dhcp, dns, s);
895 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
897 for (config = slirp_configs; config; config = config->next) {
898 if (config->flags & SLIRP_CFG_HOSTFWD) {
899 if (slirp_hostfwd(s, config->str,
900 config->flags & SLIRP_CFG_LEGACY) < 0)
901 return -1;
902 } else {
903 if (slirp_guestfwd(s, config->str,
904 config->flags & SLIRP_CFG_LEGACY) < 0)
905 return -1;
908 #ifndef _WIN32
909 if (!smb_export) {
910 smb_export = legacy_smb_export;
912 if (smb_export) {
913 if (slirp_smb(s, smb_export, smbsrv) < 0)
914 return -1;
916 #endif
918 s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_SLIRP,
919 vlan, NULL, model, name, NULL,
920 slirp_receive, NULL, NULL,
921 net_slirp_cleanup, s);
922 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
923 "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
924 return 0;
927 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
928 const char *stack)
930 VLANClientState *vc;
932 if (vlan) {
933 vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
934 if (!vc) {
935 return NULL;
937 if (strcmp(vc->model, "user")) {
938 monitor_printf(mon, "invalid device specified\n");
939 return NULL;
941 return vc->opaque;
942 } else {
943 if (QTAILQ_EMPTY(&slirp_stacks)) {
944 monitor_printf(mon, "user mode network stack not in use\n");
945 return NULL;
947 return QTAILQ_FIRST(&slirp_stacks);
951 void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict)
953 struct in_addr host_addr = { .s_addr = INADDR_ANY };
954 int host_port;
955 char buf[256] = "";
956 const char *src_str, *p;
957 SlirpState *s;
958 int is_udp = 0;
959 int err;
960 const char *arg1 = qdict_get_str(qdict, "arg1");
961 const char *arg2 = qdict_get_try_str(qdict, "arg2");
962 const char *arg3 = qdict_get_try_str(qdict, "arg3");
964 if (arg2) {
965 s = slirp_lookup(mon, arg1, arg2);
966 src_str = arg3;
967 } else {
968 s = slirp_lookup(mon, NULL, NULL);
969 src_str = arg1;
971 if (!s) {
972 return;
975 if (!src_str || !src_str[0])
976 goto fail_syntax;
978 p = src_str;
979 get_str_sep(buf, sizeof(buf), &p, ':');
981 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
982 is_udp = 0;
983 } else if (!strcmp(buf, "udp")) {
984 is_udp = 1;
985 } else {
986 goto fail_syntax;
989 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
990 goto fail_syntax;
992 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
993 goto fail_syntax;
996 host_port = atoi(p);
998 err = slirp_remove_hostfwd(QTAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
999 host_addr, host_port);
1001 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
1002 err ? "removed" : "not found");
1003 return;
1005 fail_syntax:
1006 monitor_printf(mon, "invalid format\n");
1009 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
1010 int legacy_format)
1012 struct in_addr host_addr = { .s_addr = INADDR_ANY };
1013 struct in_addr guest_addr = { .s_addr = 0 };
1014 int host_port, guest_port;
1015 const char *p;
1016 char buf[256];
1017 int is_udp;
1018 char *end;
1020 p = redir_str;
1021 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1022 goto fail_syntax;
1024 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
1025 is_udp = 0;
1026 } else if (!strcmp(buf, "udp")) {
1027 is_udp = 1;
1028 } else {
1029 goto fail_syntax;
1032 if (!legacy_format) {
1033 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1034 goto fail_syntax;
1036 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
1037 goto fail_syntax;
1041 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
1042 goto fail_syntax;
1044 host_port = strtol(buf, &end, 0);
1045 if (*end != '\0' || host_port < 1 || host_port > 65535) {
1046 goto fail_syntax;
1049 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1050 goto fail_syntax;
1052 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1053 goto fail_syntax;
1056 guest_port = strtol(p, &end, 0);
1057 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1058 goto fail_syntax;
1061 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1062 guest_port) < 0) {
1063 qemu_error("could not set up host forwarding rule '%s'\n",
1064 redir_str);
1065 return -1;
1067 return 0;
1069 fail_syntax:
1070 qemu_error("invalid host forwarding rule '%s'\n", redir_str);
1071 return -1;
1074 void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict)
1076 const char *redir_str;
1077 SlirpState *s;
1078 const char *arg1 = qdict_get_str(qdict, "arg1");
1079 const char *arg2 = qdict_get_try_str(qdict, "arg2");
1080 const char *arg3 = qdict_get_try_str(qdict, "arg3");
1082 if (arg2) {
1083 s = slirp_lookup(mon, arg1, arg2);
1084 redir_str = arg3;
1085 } else {
1086 s = slirp_lookup(mon, NULL, NULL);
1087 redir_str = arg1;
1089 if (s) {
1090 slirp_hostfwd(s, redir_str, 0);
1095 int net_slirp_redir(const char *redir_str)
1097 struct slirp_config_str *config;
1099 if (QTAILQ_EMPTY(&slirp_stacks)) {
1100 config = qemu_malloc(sizeof(*config));
1101 pstrcpy(config->str, sizeof(config->str), redir_str);
1102 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1103 config->next = slirp_configs;
1104 slirp_configs = config;
1105 return 0;
1108 return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1);
1111 #ifndef _WIN32
1113 /* automatic user mode samba server configuration */
1114 static void slirp_smb_cleanup(SlirpState *s)
1116 char cmd[128];
1118 if (s->smb_dir[0] != '\0') {
1119 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1120 system(cmd);
1121 s->smb_dir[0] = '\0';
1125 static int slirp_smb(SlirpState* s, const char *exported_dir,
1126 struct in_addr vserver_addr)
1128 static int instance;
1129 char smb_conf[128];
1130 char smb_cmdline[128];
1131 FILE *f;
1133 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1134 (long)getpid(), instance++);
1135 if (mkdir(s->smb_dir, 0700) < 0) {
1136 qemu_error("could not create samba server dir '%s'\n", s->smb_dir);
1137 return -1;
1139 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1141 f = fopen(smb_conf, "w");
1142 if (!f) {
1143 slirp_smb_cleanup(s);
1144 qemu_error("could not create samba server configuration file '%s'\n",
1145 smb_conf);
1146 return -1;
1148 fprintf(f,
1149 "[global]\n"
1150 "private dir=%s\n"
1151 "smb ports=0\n"
1152 "socket address=127.0.0.1\n"
1153 "pid directory=%s\n"
1154 "lock directory=%s\n"
1155 "log file=%s/log.smbd\n"
1156 "smb passwd file=%s/smbpasswd\n"
1157 "security = share\n"
1158 "[qemu]\n"
1159 "path=%s\n"
1160 "read only=no\n"
1161 "guest ok=yes\n",
1162 s->smb_dir,
1163 s->smb_dir,
1164 s->smb_dir,
1165 s->smb_dir,
1166 s->smb_dir,
1167 exported_dir
1169 fclose(f);
1171 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1172 SMBD_COMMAND, smb_conf);
1174 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) {
1175 slirp_smb_cleanup(s);
1176 qemu_error("conflicting/invalid smbserver address\n");
1177 return -1;
1179 return 0;
1182 /* automatic user mode samba server configuration (legacy interface) */
1183 int net_slirp_smb(const char *exported_dir)
1185 struct in_addr vserver_addr = { .s_addr = 0 };
1187 if (legacy_smb_export) {
1188 fprintf(stderr, "-smb given twice\n");
1189 return -1;
1191 legacy_smb_export = exported_dir;
1192 if (!QTAILQ_EMPTY(&slirp_stacks)) {
1193 return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
1194 vserver_addr);
1196 return 0;
1199 #endif /* !defined(_WIN32) */
1201 struct GuestFwd {
1202 CharDriverState *hd;
1203 struct in_addr server;
1204 int port;
1205 Slirp *slirp;
1208 static int guestfwd_can_read(void *opaque)
1210 struct GuestFwd *fwd = opaque;
1211 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1214 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1216 struct GuestFwd *fwd = opaque;
1217 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1220 static int slirp_guestfwd(SlirpState *s, const char *config_str,
1221 int legacy_format)
1223 struct in_addr server = { .s_addr = 0 };
1224 struct GuestFwd *fwd;
1225 const char *p;
1226 char buf[128];
1227 char *end;
1228 int port;
1230 p = config_str;
1231 if (legacy_format) {
1232 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1233 goto fail_syntax;
1235 } else {
1236 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1237 goto fail_syntax;
1239 if (strcmp(buf, "tcp") && buf[0] != '\0') {
1240 goto fail_syntax;
1242 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1243 goto fail_syntax;
1245 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1246 goto fail_syntax;
1248 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1249 goto fail_syntax;
1252 port = strtol(buf, &end, 10);
1253 if (*end != '\0' || port < 1 || port > 65535) {
1254 goto fail_syntax;
1257 fwd = qemu_malloc(sizeof(struct GuestFwd));
1258 snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1259 fwd->hd = qemu_chr_open(buf, p, NULL);
1260 if (!fwd->hd) {
1261 qemu_error("could not open guest forwarding device '%s'\n", buf);
1262 qemu_free(fwd);
1263 return -1;
1266 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
1267 qemu_error("conflicting/invalid host:port in guest forwarding "
1268 "rule '%s'\n", config_str);
1269 qemu_free(fwd);
1270 return -1;
1272 fwd->server = server;
1273 fwd->port = port;
1274 fwd->slirp = s->slirp;
1276 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1277 NULL, fwd);
1278 return 0;
1280 fail_syntax:
1281 qemu_error("invalid guest forwarding rule '%s'\n", config_str);
1282 return -1;
1285 void do_info_usernet(Monitor *mon)
1287 SlirpState *s;
1289 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
1290 monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1291 slirp_connection_info(s->slirp, mon);
1295 #endif /* CONFIG_SLIRP */
1297 #if defined(_WIN32)
1298 int tap_has_ufo(VLANClientState *vc)
1300 return 0;
1302 int tap_has_vnet_hdr(VLANClientState *vc)
1304 return 0;
1306 void tap_using_vnet_hdr(VLANClientState *vc, int using_vnet_hdr)
1309 void tap_set_offload(VLANClientState *vc, int csum, int tso4,
1310 int tso6, int ecn, int ufo)
1313 #else /* !defined(_WIN32) */
1315 /* Maximum GSO packet size (64k) plus plenty of room for
1316 * the ethernet and virtio_net headers
1318 #define TAP_BUFSIZE (4096 + 65536)
1320 typedef struct TAPState {
1321 VLANClientState *vc;
1322 int fd;
1323 char down_script[1024];
1324 char down_script_arg[128];
1325 uint8_t buf[TAP_BUFSIZE];
1326 unsigned int read_poll : 1;
1327 unsigned int write_poll : 1;
1328 unsigned int has_vnet_hdr : 1;
1329 unsigned int using_vnet_hdr : 1;
1330 unsigned int has_ufo: 1;
1331 } TAPState;
1333 static int launch_script(const char *setup_script, const char *ifname, int fd);
1335 static int tap_can_send(void *opaque);
1336 static void tap_send(void *opaque);
1337 static void tap_writable(void *opaque);
1339 static void tap_update_fd_handler(TAPState *s)
1341 qemu_set_fd_handler2(s->fd,
1342 s->read_poll ? tap_can_send : NULL,
1343 s->read_poll ? tap_send : NULL,
1344 s->write_poll ? tap_writable : NULL,
1348 static void tap_read_poll(TAPState *s, int enable)
1350 s->read_poll = !!enable;
1351 tap_update_fd_handler(s);
1354 static void tap_write_poll(TAPState *s, int enable)
1356 s->write_poll = !!enable;
1357 tap_update_fd_handler(s);
1360 static void tap_writable(void *opaque)
1362 TAPState *s = opaque;
1364 tap_write_poll(s, 0);
1366 qemu_flush_queued_packets(s->vc);
1369 static ssize_t tap_write_packet(TAPState *s, const struct iovec *iov, int iovcnt)
1371 ssize_t len;
1373 do {
1374 len = writev(s->fd, iov, iovcnt);
1375 } while (len == -1 && errno == EINTR);
1377 if (len == -1 && errno == EAGAIN) {
1378 tap_write_poll(s, 1);
1379 return 0;
1382 return len;
1385 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1386 int iovcnt)
1388 TAPState *s = vc->opaque;
1389 const struct iovec *iovp = iov;
1390 struct iovec iov_copy[iovcnt + 1];
1391 struct virtio_net_hdr hdr = { 0, };
1393 if (s->has_vnet_hdr && !s->using_vnet_hdr) {
1394 iov_copy[0].iov_base = &hdr;
1395 iov_copy[0].iov_len = sizeof(hdr);
1396 memcpy(&iov_copy[1], iov, iovcnt * sizeof(*iov));
1397 iovp = iov_copy;
1398 iovcnt++;
1401 return tap_write_packet(s, iovp, iovcnt);
1404 static ssize_t tap_receive_raw(VLANClientState *vc, const uint8_t *buf, size_t size)
1406 TAPState *s = vc->opaque;
1407 struct iovec iov[2];
1408 int iovcnt = 0;
1409 struct virtio_net_hdr hdr = { 0, };
1411 if (s->has_vnet_hdr) {
1412 iov[iovcnt].iov_base = &hdr;
1413 iov[iovcnt].iov_len = sizeof(hdr);
1414 iovcnt++;
1417 iov[iovcnt].iov_base = (char *)buf;
1418 iov[iovcnt].iov_len = size;
1419 iovcnt++;
1421 return tap_write_packet(s, iov, iovcnt);
1424 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1426 TAPState *s = vc->opaque;
1427 struct iovec iov[1];
1429 if (s->has_vnet_hdr && !s->using_vnet_hdr) {
1430 return tap_receive_raw(vc, buf, size);
1433 iov[0].iov_base = (char *)buf;
1434 iov[0].iov_len = size;
1436 return tap_write_packet(s, iov, 1);
1439 static int tap_can_send(void *opaque)
1441 TAPState *s = opaque;
1443 return qemu_can_send_packet(s->vc);
1446 #ifdef __sun__
1447 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1449 struct strbuf sbuf;
1450 int f = 0;
1452 sbuf.maxlen = maxlen;
1453 sbuf.buf = (char *)buf;
1455 return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1457 #else
1458 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1460 return read(tapfd, buf, maxlen);
1462 #endif
1464 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1466 TAPState *s = vc->opaque;
1467 tap_read_poll(s, 1);
1470 static void tap_send(void *opaque)
1472 TAPState *s = opaque;
1473 int size;
1475 do {
1476 uint8_t *buf = s->buf;
1478 size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1479 if (size <= 0) {
1480 break;
1483 if (s->has_vnet_hdr && !s->using_vnet_hdr) {
1484 buf += sizeof(struct virtio_net_hdr);
1485 size -= sizeof(struct virtio_net_hdr);
1488 size = qemu_send_packet_async(s->vc, buf, size, tap_send_completed);
1489 if (size == 0) {
1490 tap_read_poll(s, 0);
1492 } while (size > 0);
1495 /* sndbuf should be set to a value lower than the tx queue
1496 * capacity of any destination network interface.
1497 * Ethernet NICs generally have txqueuelen=1000, so 1Mb is
1498 * a good default, given a 1500 byte MTU.
1500 #define TAP_DEFAULT_SNDBUF 1024*1024
1502 static int tap_set_sndbuf(TAPState *s, QemuOpts *opts)
1504 int sndbuf;
1506 sndbuf = qemu_opt_get_size(opts, "sndbuf", TAP_DEFAULT_SNDBUF);
1507 if (!sndbuf) {
1508 sndbuf = INT_MAX;
1511 if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1 && qemu_opt_get(opts, "sndbuf")) {
1512 qemu_error("TUNSETSNDBUF ioctl failed: %s\n", strerror(errno));
1513 return -1;
1515 return 0;
1518 int tap_has_ufo(VLANClientState *vc)
1520 TAPState *s = vc->opaque;
1522 assert(vc->type == NET_CLIENT_TYPE_TAP);
1524 return s->has_ufo;
1527 int tap_has_vnet_hdr(VLANClientState *vc)
1529 TAPState *s = vc->opaque;
1531 assert(vc->type == NET_CLIENT_TYPE_TAP);
1533 return s->has_vnet_hdr;
1536 void tap_using_vnet_hdr(VLANClientState *vc, int using_vnet_hdr)
1538 TAPState *s = vc->opaque;
1540 using_vnet_hdr = using_vnet_hdr != 0;
1542 assert(vc->type == NET_CLIENT_TYPE_TAP);
1543 assert(s->has_vnet_hdr == using_vnet_hdr);
1545 s->using_vnet_hdr = using_vnet_hdr;
1548 static int tap_probe_vnet_hdr(int fd)
1550 struct ifreq ifr;
1552 if (ioctl(fd, TUNGETIFF, &ifr) != 0) {
1553 qemu_error("TUNGETIFF ioctl() failed: %s\n", strerror(errno));
1554 return 0;
1557 return ifr.ifr_flags & IFF_VNET_HDR;
1560 void tap_set_offload(VLANClientState *vc, int csum, int tso4,
1561 int tso6, int ecn, int ufo)
1563 TAPState *s = vc->opaque;
1564 unsigned int offload = 0;
1566 if (csum) {
1567 offload |= TUN_F_CSUM;
1568 if (tso4)
1569 offload |= TUN_F_TSO4;
1570 if (tso6)
1571 offload |= TUN_F_TSO6;
1572 if ((tso4 || tso6) && ecn)
1573 offload |= TUN_F_TSO_ECN;
1574 if (ufo)
1575 offload |= TUN_F_UFO;
1578 if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0) {
1579 offload &= ~TUN_F_UFO;
1580 if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0) {
1581 fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n",
1582 strerror(errno));
1587 static void tap_cleanup(VLANClientState *vc)
1589 TAPState *s = vc->opaque;
1591 qemu_purge_queued_packets(vc);
1593 if (s->down_script[0])
1594 launch_script(s->down_script, s->down_script_arg, s->fd);
1596 tap_read_poll(s, 0);
1597 tap_write_poll(s, 0);
1598 close(s->fd);
1599 qemu_free(s);
1602 /* fd support */
1604 static TAPState *net_tap_fd_init(VLANState *vlan,
1605 const char *model,
1606 const char *name,
1607 int fd,
1608 int vnet_hdr)
1610 TAPState *s;
1611 unsigned int offload;
1613 s = qemu_mallocz(sizeof(TAPState));
1614 s->fd = fd;
1615 s->has_vnet_hdr = vnet_hdr != 0;
1616 s->using_vnet_hdr = 0;
1617 s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_TAP,
1618 vlan, NULL, model, name, NULL,
1619 tap_receive, tap_receive_raw,
1620 tap_receive_iov, tap_cleanup, s);
1621 s->has_ufo = 0;
1622 /* Check if tap supports UFO */
1623 offload = TUN_F_CSUM | TUN_F_UFO;
1624 if (ioctl(s->fd, TUNSETOFFLOAD, offload) == 0)
1625 s->has_ufo = 1;
1626 tap_set_offload(s->vc, 0, 0, 0, 0, 0);
1627 tap_read_poll(s, 1);
1628 return s;
1631 #if defined (CONFIG_BSD) || defined (__FreeBSD_kernel__)
1632 static int tap_open(char *ifname, int ifname_size,
1633 int *vnet_hdr, int vnet_hdr_required)
1635 int fd;
1636 char *dev;
1637 struct stat s;
1639 TFR(fd = open("/dev/tap", O_RDWR));
1640 if (fd < 0) {
1641 fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1642 return -1;
1645 fstat(fd, &s);
1646 dev = devname(s.st_rdev, S_IFCHR);
1647 pstrcpy(ifname, ifname_size, dev);
1649 fcntl(fd, F_SETFL, O_NONBLOCK);
1650 return fd;
1652 #elif defined(__sun__)
1653 #define TUNNEWPPA (('T'<<16) | 0x0001)
1655 * Allocate TAP device, returns opened fd.
1656 * Stores dev name in the first arg(must be large enough).
1658 static int tap_alloc(char *dev, size_t dev_size)
1660 int tap_fd, if_fd, ppa = -1;
1661 static int ip_fd = 0;
1662 char *ptr;
1664 static int arp_fd = 0;
1665 int ip_muxid, arp_muxid;
1666 struct strioctl strioc_if, strioc_ppa;
1667 int link_type = I_PLINK;;
1668 struct lifreq ifr;
1669 char actual_name[32] = "";
1671 memset(&ifr, 0x0, sizeof(ifr));
1673 if( *dev ){
1674 ptr = dev;
1675 while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1676 ppa = atoi(ptr);
1679 /* Check if IP device was opened */
1680 if( ip_fd )
1681 close(ip_fd);
1683 TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1684 if (ip_fd < 0) {
1685 syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1686 return -1;
1689 TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1690 if (tap_fd < 0) {
1691 syslog(LOG_ERR, "Can't open /dev/tap");
1692 return -1;
1695 /* Assign a new PPA and get its unit number. */
1696 strioc_ppa.ic_cmd = TUNNEWPPA;
1697 strioc_ppa.ic_timout = 0;
1698 strioc_ppa.ic_len = sizeof(ppa);
1699 strioc_ppa.ic_dp = (char *)&ppa;
1700 if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1701 syslog (LOG_ERR, "Can't assign new interface");
1703 TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1704 if (if_fd < 0) {
1705 syslog(LOG_ERR, "Can't open /dev/tap (2)");
1706 return -1;
1708 if(ioctl(if_fd, I_PUSH, "ip") < 0){
1709 syslog(LOG_ERR, "Can't push IP module");
1710 return -1;
1713 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1714 syslog(LOG_ERR, "Can't get flags\n");
1716 snprintf (actual_name, 32, "tap%d", ppa);
1717 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1719 ifr.lifr_ppa = ppa;
1720 /* Assign ppa according to the unit number returned by tun device */
1722 if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1723 syslog (LOG_ERR, "Can't set PPA %d", ppa);
1724 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1725 syslog (LOG_ERR, "Can't get flags\n");
1726 /* Push arp module to if_fd */
1727 if (ioctl (if_fd, I_PUSH, "arp") < 0)
1728 syslog (LOG_ERR, "Can't push ARP module (2)");
1730 /* Push arp module to ip_fd */
1731 if (ioctl (ip_fd, I_POP, NULL) < 0)
1732 syslog (LOG_ERR, "I_POP failed\n");
1733 if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1734 syslog (LOG_ERR, "Can't push ARP module (3)\n");
1735 /* Open arp_fd */
1736 TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1737 if (arp_fd < 0)
1738 syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1740 /* Set ifname to arp */
1741 strioc_if.ic_cmd = SIOCSLIFNAME;
1742 strioc_if.ic_timout = 0;
1743 strioc_if.ic_len = sizeof(ifr);
1744 strioc_if.ic_dp = (char *)&ifr;
1745 if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1746 syslog (LOG_ERR, "Can't set ifname to arp\n");
1749 if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1750 syslog(LOG_ERR, "Can't link TAP device to IP");
1751 return -1;
1754 if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1755 syslog (LOG_ERR, "Can't link TAP device to ARP");
1757 close (if_fd);
1759 memset(&ifr, 0x0, sizeof(ifr));
1760 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1761 ifr.lifr_ip_muxid = ip_muxid;
1762 ifr.lifr_arp_muxid = arp_muxid;
1764 if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1766 ioctl (ip_fd, I_PUNLINK , arp_muxid);
1767 ioctl (ip_fd, I_PUNLINK, ip_muxid);
1768 syslog (LOG_ERR, "Can't set multiplexor id");
1771 snprintf(dev, dev_size, "tap%d", ppa);
1772 return tap_fd;
1775 static int tap_open(char *ifname, int ifname_size,
1776 int *vnet_hdr, int vnet_hdr_required)
1778 char dev[10]="";
1779 int fd;
1780 if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1781 fprintf(stderr, "Cannot allocate TAP device\n");
1782 return -1;
1784 pstrcpy(ifname, ifname_size, dev);
1785 fcntl(fd, F_SETFL, O_NONBLOCK);
1786 return fd;
1788 #elif defined (_AIX)
1789 static int tap_open(char *ifname, int ifname_size,
1790 int *vnet_hdr, int vnet_hdr_required)
1792 fprintf (stderr, "no tap on AIX\n");
1793 return -1;
1795 #else
1796 static int tap_open(char *ifname, int ifname_size,
1797 int *vnet_hdr, int vnet_hdr_required)
1799 struct ifreq ifr;
1800 int fd, ret;
1802 TFR(fd = open("/dev/net/tun", O_RDWR));
1803 if (fd < 0) {
1804 fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1805 return -1;
1807 memset(&ifr, 0, sizeof(ifr));
1808 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1810 if (*vnet_hdr) {
1811 unsigned int features;
1813 if (ioctl(fd, TUNGETFEATURES, &features) == 0 &&
1814 features & IFF_VNET_HDR) {
1815 *vnet_hdr = 1;
1816 ifr.ifr_flags |= IFF_VNET_HDR;
1819 if (vnet_hdr_required && !*vnet_hdr) {
1820 qemu_error("vnet_hdr=1 requested, but no kernel "
1821 "support for IFF_VNET_HDR available");
1822 close(fd);
1823 return -1;
1827 if (ifname[0] != '\0')
1828 pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1829 else
1830 pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1831 ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1832 if (ret != 0) {
1833 fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1834 close(fd);
1835 return -1;
1837 pstrcpy(ifname, ifname_size, ifr.ifr_name);
1838 fcntl(fd, F_SETFL, O_NONBLOCK);
1839 return fd;
1841 #endif
1843 static int launch_script(const char *setup_script, const char *ifname, int fd)
1845 sigset_t oldmask, mask;
1846 int pid, status;
1847 char *args[3];
1848 char **parg;
1850 sigemptyset(&mask);
1851 sigaddset(&mask, SIGCHLD);
1852 sigprocmask(SIG_BLOCK, &mask, &oldmask);
1854 /* try to launch network script */
1855 pid = fork();
1856 if (pid == 0) {
1857 int open_max = sysconf(_SC_OPEN_MAX), i;
1859 for (i = 0; i < open_max; i++) {
1860 if (i != STDIN_FILENO &&
1861 i != STDOUT_FILENO &&
1862 i != STDERR_FILENO &&
1863 i != fd) {
1864 close(i);
1867 parg = args;
1868 *parg++ = (char *)setup_script;
1869 *parg++ = (char *)ifname;
1870 *parg++ = NULL;
1871 execv(setup_script, args);
1872 _exit(1);
1873 } else if (pid > 0) {
1874 while (waitpid(pid, &status, 0) != pid) {
1875 /* loop */
1877 sigprocmask(SIG_SETMASK, &oldmask, NULL);
1879 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1880 return 0;
1883 fprintf(stderr, "%s: could not launch network script\n", setup_script);
1884 return -1;
1887 static int net_tap_init(QemuOpts *opts, int *vnet_hdr)
1889 int fd, vnet_hdr_required;
1890 char ifname[128] = {0,};
1891 const char *setup_script;
1893 if (qemu_opt_get(opts, "ifname")) {
1894 pstrcpy(ifname, sizeof(ifname), qemu_opt_get(opts, "ifname"));
1897 *vnet_hdr = qemu_opt_get_bool(opts, "vnet_hdr", 1);
1898 if (qemu_opt_get(opts, "vnet_hdr")) {
1899 vnet_hdr_required = *vnet_hdr;
1900 } else {
1901 vnet_hdr_required = 0;
1904 TFR(fd = tap_open(ifname, sizeof(ifname), vnet_hdr, vnet_hdr_required));
1905 if (fd < 0) {
1906 return -1;
1909 setup_script = qemu_opt_get(opts, "script");
1910 if (setup_script &&
1911 setup_script[0] != '\0' &&
1912 strcmp(setup_script, "no") != 0 &&
1913 launch_script(setup_script, ifname, fd)) {
1914 close(fd);
1915 return -1;
1918 qemu_opt_set(opts, "ifname", ifname);
1920 return fd;
1923 #endif /* !_WIN32 */
1925 #if defined(CONFIG_VDE)
1926 typedef struct VDEState {
1927 VLANClientState *vc;
1928 VDECONN *vde;
1929 } VDEState;
1931 static void vde_to_qemu(void *opaque)
1933 VDEState *s = opaque;
1934 uint8_t buf[4096];
1935 int size;
1937 size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1938 if (size > 0) {
1939 qemu_send_packet(s->vc, buf, size);
1943 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1945 VDEState *s = vc->opaque;
1946 ssize_t ret;
1948 do {
1949 ret = vde_send(s->vde, (const char *)buf, size, 0);
1950 } while (ret < 0 && errno == EINTR);
1952 return ret;
1955 static void vde_cleanup(VLANClientState *vc)
1957 VDEState *s = vc->opaque;
1958 qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1959 vde_close(s->vde);
1960 qemu_free(s);
1963 static int net_vde_init(VLANState *vlan, const char *model,
1964 const char *name, const char *sock,
1965 int port, const char *group, int mode)
1967 VDEState *s;
1968 char *init_group = (char *)group;
1969 char *init_sock = (char *)sock;
1971 struct vde_open_args args = {
1972 .port = port,
1973 .group = init_group,
1974 .mode = mode,
1977 s = qemu_mallocz(sizeof(VDEState));
1978 s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1979 if (!s->vde){
1980 free(s);
1981 return -1;
1983 s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_VDE,
1984 vlan, NULL, model, name, NULL,
1985 vde_receive, NULL, NULL,
1986 vde_cleanup, s);
1987 qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1988 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1989 sock, vde_datafd(s->vde));
1990 return 0;
1992 #endif
1994 /* network connection */
1995 typedef struct NetSocketState {
1996 VLANClientState *vc;
1997 int fd;
1998 int state; /* 0 = getting length, 1 = getting data */
1999 unsigned int index;
2000 unsigned int packet_len;
2001 uint8_t buf[4096];
2002 struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
2003 } NetSocketState;
2005 typedef struct NetSocketListenState {
2006 VLANState *vlan;
2007 char *model;
2008 char *name;
2009 int fd;
2010 } NetSocketListenState;
2012 /* XXX: we consider we can send the whole packet without blocking */
2013 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2015 NetSocketState *s = vc->opaque;
2016 uint32_t len;
2017 len = htonl(size);
2019 send_all(s->fd, (const uint8_t *)&len, sizeof(len));
2020 return send_all(s->fd, buf, size);
2023 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
2025 NetSocketState *s = vc->opaque;
2027 return sendto(s->fd, (const void *)buf, size, 0,
2028 (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
2031 static void net_socket_send(void *opaque)
2033 NetSocketState *s = opaque;
2034 int size, err;
2035 unsigned l;
2036 uint8_t buf1[4096];
2037 const uint8_t *buf;
2039 size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
2040 if (size < 0) {
2041 err = socket_error();
2042 if (err != EWOULDBLOCK)
2043 goto eoc;
2044 } else if (size == 0) {
2045 /* end of connection */
2046 eoc:
2047 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2048 closesocket(s->fd);
2049 return;
2051 buf = buf1;
2052 while (size > 0) {
2053 /* reassemble a packet from the network */
2054 switch(s->state) {
2055 case 0:
2056 l = 4 - s->index;
2057 if (l > size)
2058 l = size;
2059 memcpy(s->buf + s->index, buf, l);
2060 buf += l;
2061 size -= l;
2062 s->index += l;
2063 if (s->index == 4) {
2064 /* got length */
2065 s->packet_len = ntohl(*(uint32_t *)s->buf);
2066 s->index = 0;
2067 s->state = 1;
2069 break;
2070 case 1:
2071 l = s->packet_len - s->index;
2072 if (l > size)
2073 l = size;
2074 if (s->index + l <= sizeof(s->buf)) {
2075 memcpy(s->buf + s->index, buf, l);
2076 } else {
2077 fprintf(stderr, "serious error: oversized packet received,"
2078 "connection terminated.\n");
2079 s->state = 0;
2080 goto eoc;
2083 s->index += l;
2084 buf += l;
2085 size -= l;
2086 if (s->index >= s->packet_len) {
2087 qemu_send_packet(s->vc, s->buf, s->packet_len);
2088 s->index = 0;
2089 s->state = 0;
2091 break;
2096 static void net_socket_send_dgram(void *opaque)
2098 NetSocketState *s = opaque;
2099 int size;
2101 size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
2102 if (size < 0)
2103 return;
2104 if (size == 0) {
2105 /* end of connection */
2106 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2107 return;
2109 qemu_send_packet(s->vc, s->buf, size);
2112 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
2114 struct ip_mreq imr;
2115 int fd;
2116 int val, ret;
2117 if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
2118 fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
2119 inet_ntoa(mcastaddr->sin_addr),
2120 (int)ntohl(mcastaddr->sin_addr.s_addr));
2121 return -1;
2124 fd = socket(PF_INET, SOCK_DGRAM, 0);
2125 if (fd < 0) {
2126 perror("socket(PF_INET, SOCK_DGRAM)");
2127 return -1;
2130 val = 1;
2131 ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
2132 (const char *)&val, sizeof(val));
2133 if (ret < 0) {
2134 perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
2135 goto fail;
2138 ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
2139 if (ret < 0) {
2140 perror("bind");
2141 goto fail;
2144 /* Add host to multicast group */
2145 imr.imr_multiaddr = mcastaddr->sin_addr;
2146 imr.imr_interface.s_addr = htonl(INADDR_ANY);
2148 ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
2149 (const char *)&imr, sizeof(struct ip_mreq));
2150 if (ret < 0) {
2151 perror("setsockopt(IP_ADD_MEMBERSHIP)");
2152 goto fail;
2155 /* Force mcast msgs to loopback (eg. several QEMUs in same host */
2156 val = 1;
2157 ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
2158 (const char *)&val, sizeof(val));
2159 if (ret < 0) {
2160 perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
2161 goto fail;
2164 socket_set_nonblock(fd);
2165 return fd;
2166 fail:
2167 if (fd >= 0)
2168 closesocket(fd);
2169 return -1;
2172 static void net_socket_cleanup(VLANClientState *vc)
2174 NetSocketState *s = vc->opaque;
2175 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2176 close(s->fd);
2177 qemu_free(s);
2180 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
2181 const char *model,
2182 const char *name,
2183 int fd, int is_connected)
2185 struct sockaddr_in saddr;
2186 int newfd;
2187 socklen_t saddr_len;
2188 NetSocketState *s;
2190 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
2191 * Because this may be "shared" socket from a "master" process, datagrams would be recv()
2192 * by ONLY ONE process: we must "clone" this dgram socket --jjo
2195 if (is_connected) {
2196 if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
2197 /* must be bound */
2198 if (saddr.sin_addr.s_addr==0) {
2199 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
2200 fd);
2201 return NULL;
2203 /* clone dgram socket */
2204 newfd = net_socket_mcast_create(&saddr);
2205 if (newfd < 0) {
2206 /* error already reported by net_socket_mcast_create() */
2207 close(fd);
2208 return NULL;
2210 /* clone newfd to fd, close newfd */
2211 dup2(newfd, fd);
2212 close(newfd);
2214 } else {
2215 fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
2216 fd, strerror(errno));
2217 return NULL;
2221 s = qemu_mallocz(sizeof(NetSocketState));
2222 s->fd = fd;
2224 s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_SOCKET,
2225 vlan, NULL, model, name, NULL,
2226 net_socket_receive_dgram, NULL, NULL,
2227 net_socket_cleanup, s);
2228 qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
2230 /* mcast: save bound address as dst */
2231 if (is_connected) s->dgram_dst=saddr;
2233 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2234 "socket: fd=%d (%s mcast=%s:%d)",
2235 fd, is_connected? "cloned" : "",
2236 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2237 return s;
2240 static void net_socket_connect(void *opaque)
2242 NetSocketState *s = opaque;
2243 qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2246 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2247 const char *model,
2248 const char *name,
2249 int fd, int is_connected)
2251 NetSocketState *s;
2252 s = qemu_mallocz(sizeof(NetSocketState));
2253 s->fd = fd;
2254 s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_SOCKET,
2255 vlan, NULL, model, name, NULL,
2256 net_socket_receive, NULL, NULL,
2257 net_socket_cleanup, s);
2258 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2259 "socket: fd=%d", fd);
2260 if (is_connected) {
2261 net_socket_connect(s);
2262 } else {
2263 qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2265 return s;
2268 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2269 const char *model, const char *name,
2270 int fd, int is_connected)
2272 int so_type = -1, optlen=sizeof(so_type);
2274 if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2275 (socklen_t *)&optlen)< 0) {
2276 fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2277 return NULL;
2279 switch(so_type) {
2280 case SOCK_DGRAM:
2281 return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2282 case SOCK_STREAM:
2283 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2284 default:
2285 /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2286 fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2287 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2289 return NULL;
2292 static void net_socket_accept(void *opaque)
2294 NetSocketListenState *s = opaque;
2295 NetSocketState *s1;
2296 struct sockaddr_in saddr;
2297 socklen_t len;
2298 int fd;
2300 for(;;) {
2301 len = sizeof(saddr);
2302 fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2303 if (fd < 0 && errno != EINTR) {
2304 return;
2305 } else if (fd >= 0) {
2306 break;
2309 s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2310 if (!s1) {
2311 closesocket(fd);
2312 } else {
2313 snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2314 "socket: connection from %s:%d",
2315 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2319 static int net_socket_listen_init(VLANState *vlan,
2320 const char *model,
2321 const char *name,
2322 const char *host_str)
2324 NetSocketListenState *s;
2325 int fd, val, ret;
2326 struct sockaddr_in saddr;
2328 if (parse_host_port(&saddr, host_str) < 0)
2329 return -1;
2331 s = qemu_mallocz(sizeof(NetSocketListenState));
2333 fd = socket(PF_INET, SOCK_STREAM, 0);
2334 if (fd < 0) {
2335 perror("socket");
2336 return -1;
2338 socket_set_nonblock(fd);
2340 /* allow fast reuse */
2341 val = 1;
2342 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2344 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2345 if (ret < 0) {
2346 perror("bind");
2347 return -1;
2349 ret = listen(fd, 0);
2350 if (ret < 0) {
2351 perror("listen");
2352 return -1;
2354 s->vlan = vlan;
2355 s->model = qemu_strdup(model);
2356 s->name = name ? qemu_strdup(name) : NULL;
2357 s->fd = fd;
2358 qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2359 return 0;
2362 static int net_socket_connect_init(VLANState *vlan,
2363 const char *model,
2364 const char *name,
2365 const char *host_str)
2367 NetSocketState *s;
2368 int fd, connected, ret, err;
2369 struct sockaddr_in saddr;
2371 if (parse_host_port(&saddr, host_str) < 0)
2372 return -1;
2374 fd = socket(PF_INET, SOCK_STREAM, 0);
2375 if (fd < 0) {
2376 perror("socket");
2377 return -1;
2379 socket_set_nonblock(fd);
2381 connected = 0;
2382 for(;;) {
2383 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2384 if (ret < 0) {
2385 err = socket_error();
2386 if (err == EINTR || err == EWOULDBLOCK) {
2387 } else if (err == EINPROGRESS) {
2388 break;
2389 #ifdef _WIN32
2390 } else if (err == WSAEALREADY) {
2391 break;
2392 #endif
2393 } else {
2394 perror("connect");
2395 closesocket(fd);
2396 return -1;
2398 } else {
2399 connected = 1;
2400 break;
2403 s = net_socket_fd_init(vlan, model, name, fd, connected);
2404 if (!s)
2405 return -1;
2406 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2407 "socket: connect to %s:%d",
2408 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2409 return 0;
2412 static int net_socket_mcast_init(VLANState *vlan,
2413 const char *model,
2414 const char *name,
2415 const char *host_str)
2417 NetSocketState *s;
2418 int fd;
2419 struct sockaddr_in saddr;
2421 if (parse_host_port(&saddr, host_str) < 0)
2422 return -1;
2425 fd = net_socket_mcast_create(&saddr);
2426 if (fd < 0)
2427 return -1;
2429 s = net_socket_fd_init(vlan, model, name, fd, 0);
2430 if (!s)
2431 return -1;
2433 s->dgram_dst = saddr;
2435 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2436 "socket: mcast=%s:%d",
2437 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2438 return 0;
2442 typedef struct DumpState {
2443 VLANClientState *pcap_vc;
2444 int fd;
2445 int pcap_caplen;
2446 } DumpState;
2448 #define PCAP_MAGIC 0xa1b2c3d4
2450 struct pcap_file_hdr {
2451 uint32_t magic;
2452 uint16_t version_major;
2453 uint16_t version_minor;
2454 int32_t thiszone;
2455 uint32_t sigfigs;
2456 uint32_t snaplen;
2457 uint32_t linktype;
2460 struct pcap_sf_pkthdr {
2461 struct {
2462 int32_t tv_sec;
2463 int32_t tv_usec;
2464 } ts;
2465 uint32_t caplen;
2466 uint32_t len;
2469 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2471 DumpState *s = vc->opaque;
2472 struct pcap_sf_pkthdr hdr;
2473 int64_t ts;
2474 int caplen;
2476 /* Early return in case of previous error. */
2477 if (s->fd < 0) {
2478 return size;
2481 ts = muldiv64(qemu_get_clock(vm_clock), 1000000, get_ticks_per_sec());
2482 caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2484 hdr.ts.tv_sec = ts / 1000000;
2485 hdr.ts.tv_usec = ts % 1000000;
2486 hdr.caplen = caplen;
2487 hdr.len = size;
2488 if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2489 write(s->fd, buf, caplen) != caplen) {
2490 qemu_log("-net dump write error - stop dump\n");
2491 close(s->fd);
2492 s->fd = -1;
2495 return size;
2498 static void net_dump_cleanup(VLANClientState *vc)
2500 DumpState *s = vc->opaque;
2502 close(s->fd);
2503 qemu_free(s);
2506 static int net_dump_init(VLANState *vlan, const char *device,
2507 const char *name, const char *filename, int len)
2509 struct pcap_file_hdr hdr;
2510 DumpState *s;
2512 s = qemu_malloc(sizeof(DumpState));
2514 s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2515 if (s->fd < 0) {
2516 qemu_error("-net dump: can't open %s\n", filename);
2517 return -1;
2520 s->pcap_caplen = len;
2522 hdr.magic = PCAP_MAGIC;
2523 hdr.version_major = 2;
2524 hdr.version_minor = 4;
2525 hdr.thiszone = 0;
2526 hdr.sigfigs = 0;
2527 hdr.snaplen = s->pcap_caplen;
2528 hdr.linktype = 1;
2530 if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2531 qemu_error("-net dump write error: %s\n", strerror(errno));
2532 close(s->fd);
2533 qemu_free(s);
2534 return -1;
2537 s->pcap_vc = qemu_new_vlan_client(NET_CLIENT_TYPE_DUMP,
2538 vlan, NULL, device, name, NULL,
2539 dump_receive, NULL, NULL,
2540 net_dump_cleanup, s);
2541 snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2542 "dump to %s (len=%d)", filename, len);
2543 return 0;
2546 /* find or alloc a new VLAN */
2547 VLANState *qemu_find_vlan(int id, int allocate)
2549 VLANState *vlan;
2551 QTAILQ_FOREACH(vlan, &vlans, next) {
2552 if (vlan->id == id) {
2553 return vlan;
2557 if (!allocate) {
2558 return NULL;
2561 vlan = qemu_mallocz(sizeof(VLANState));
2562 vlan->id = id;
2563 QTAILQ_INIT(&vlan->clients);
2565 vlan->send_queue = qemu_new_net_queue(qemu_vlan_deliver_packet,
2566 qemu_vlan_deliver_packet_iov,
2567 vlan);
2569 QTAILQ_INSERT_TAIL(&vlans, vlan, next);
2571 return vlan;
2574 VLANClientState *qemu_find_netdev(const char *id)
2576 VLANClientState *vc;
2578 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
2579 if (!strcmp(vc->name, id)) {
2580 return vc;
2584 return NULL;
2587 static int nic_get_free_idx(void)
2589 int index;
2591 for (index = 0; index < MAX_NICS; index++)
2592 if (!nd_table[index].used)
2593 return index;
2594 return -1;
2597 int qemu_show_nic_models(const char *arg, const char *const *models)
2599 int i;
2601 if (!arg || strcmp(arg, "?"))
2602 return 0;
2604 fprintf(stderr, "qemu: Supported NIC models: ");
2605 for (i = 0 ; models[i]; i++)
2606 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2607 return 1;
2610 void qemu_check_nic_model(NICInfo *nd, const char *model)
2612 const char *models[2];
2614 models[0] = model;
2615 models[1] = NULL;
2617 if (qemu_show_nic_models(nd->model, models))
2618 exit(0);
2619 if (qemu_find_nic_model(nd, models, model) < 0)
2620 exit(1);
2623 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
2624 const char *default_model)
2626 int i;
2628 if (!nd->model)
2629 nd->model = qemu_strdup(default_model);
2631 for (i = 0 ; models[i]; i++) {
2632 if (strcmp(nd->model, models[i]) == 0)
2633 return i;
2636 qemu_error("qemu: Unsupported NIC model: %s\n", nd->model);
2637 return -1;
2640 static int net_handle_fd_param(Monitor *mon, const char *param)
2642 if (!qemu_isdigit(param[0])) {
2643 int fd;
2645 fd = monitor_get_fd(mon, param);
2646 if (fd == -1) {
2647 qemu_error("No file descriptor named %s found", param);
2648 return -1;
2651 return fd;
2652 } else {
2653 return strtol(param, NULL, 0);
2657 static int net_init_nic(QemuOpts *opts,
2658 Monitor *mon,
2659 const char *name,
2660 VLANState *vlan)
2662 int idx;
2663 NICInfo *nd;
2664 const char *netdev;
2666 idx = nic_get_free_idx();
2667 if (idx == -1 || nb_nics >= MAX_NICS) {
2668 qemu_error("Too Many NICs\n");
2669 return -1;
2672 nd = &nd_table[idx];
2674 memset(nd, 0, sizeof(*nd));
2676 if ((netdev = qemu_opt_get(opts, "netdev"))) {
2677 nd->netdev = qemu_find_netdev(netdev);
2678 if (!nd->netdev) {
2679 qemu_error("netdev '%s' not found\n", netdev);
2680 return -1;
2682 } else {
2683 assert(vlan);
2684 nd->vlan = vlan;
2686 if (name) {
2687 nd->name = qemu_strdup(name);
2689 if (qemu_opt_get(opts, "model")) {
2690 nd->model = qemu_strdup(qemu_opt_get(opts, "model"));
2692 if (qemu_opt_get(opts, "addr")) {
2693 nd->devaddr = qemu_strdup(qemu_opt_get(opts, "addr"));
2696 nd->macaddr[0] = 0x52;
2697 nd->macaddr[1] = 0x54;
2698 nd->macaddr[2] = 0x00;
2699 nd->macaddr[3] = 0x12;
2700 nd->macaddr[4] = 0x34;
2701 nd->macaddr[5] = 0x56 + idx;
2703 if (qemu_opt_get(opts, "macaddr") &&
2704 parse_macaddr(nd->macaddr, qemu_opt_get(opts, "macaddr")) < 0) {
2705 qemu_error("invalid syntax for ethernet address\n");
2706 return -1;
2709 nd->nvectors = qemu_opt_get_number(opts, "vectors", NIC_NVECTORS_UNSPECIFIED);
2710 if (nd->nvectors != NIC_NVECTORS_UNSPECIFIED &&
2711 (nd->nvectors < 0 || nd->nvectors > 0x7ffffff)) {
2712 qemu_error("invalid # of vectors: %d\n", nd->nvectors);
2713 return -1;
2716 nd->used = 1;
2717 if (vlan) {
2718 nd->vlan->nb_guest_devs++;
2720 nb_nics++;
2722 return idx;
2725 #if defined(CONFIG_SLIRP)
2726 static int net_init_slirp_configs(const char *name, const char *value, void *opaque)
2728 struct slirp_config_str *config;
2730 if (strcmp(name, "hostfwd") != 0 && strcmp(name, "guestfwd") != 0) {
2731 return 0;
2734 config = qemu_mallocz(sizeof(*config));
2736 pstrcpy(config->str, sizeof(config->str), value);
2738 if (!strcmp(name, "hostfwd")) {
2739 config->flags = SLIRP_CFG_HOSTFWD;
2742 config->next = slirp_configs;
2743 slirp_configs = config;
2745 return 0;
2748 static int net_init_slirp(QemuOpts *opts,
2749 Monitor *mon,
2750 const char *name,
2751 VLANState *vlan)
2753 struct slirp_config_str *config;
2754 const char *vhost;
2755 const char *vhostname;
2756 const char *vdhcp_start;
2757 const char *vnamesrv;
2758 const char *tftp_export;
2759 const char *bootfile;
2760 const char *smb_export;
2761 const char *vsmbsrv;
2762 char *vnet = NULL;
2763 int restricted = 0;
2764 int ret;
2766 vhost = qemu_opt_get(opts, "host");
2767 vhostname = qemu_opt_get(opts, "hostname");
2768 vdhcp_start = qemu_opt_get(opts, "dhcpstart");
2769 vnamesrv = qemu_opt_get(opts, "dns");
2770 tftp_export = qemu_opt_get(opts, "tftp");
2771 bootfile = qemu_opt_get(opts, "bootfile");
2772 smb_export = qemu_opt_get(opts, "smb");
2773 vsmbsrv = qemu_opt_get(opts, "smbserver");
2775 if (qemu_opt_get(opts, "ip")) {
2776 const char *ip = qemu_opt_get(opts, "ip");
2777 int l = strlen(ip) + strlen("/24") + 1;
2779 vnet = qemu_malloc(l);
2781 /* emulate legacy ip= parameter */
2782 pstrcpy(vnet, l, ip);
2783 pstrcat(vnet, l, "/24");
2786 if (qemu_opt_get(opts, "net")) {
2787 if (vnet) {
2788 qemu_free(vnet);
2790 vnet = qemu_strdup(qemu_opt_get(opts, "net"));
2793 if (qemu_opt_get(opts, "restrict") &&
2794 qemu_opt_get(opts, "restrict")[0] == 'y') {
2795 restricted = 1;
2798 qemu_opt_foreach(opts, net_init_slirp_configs, NULL, 0);
2800 ret = net_slirp_init(vlan, "user", name, restricted, vnet, vhost,
2801 vhostname, tftp_export, bootfile, vdhcp_start,
2802 vnamesrv, smb_export, vsmbsrv);
2804 while (slirp_configs) {
2805 config = slirp_configs;
2806 slirp_configs = config->next;
2807 qemu_free(config);
2810 if (ret != -1 && vlan) {
2811 vlan->nb_host_devs++;
2814 qemu_free(vnet);
2816 return ret;
2818 #endif /* CONFIG_SLIRP */
2820 #ifdef _WIN32
2821 static int net_init_tap_win32(QemuOpts *opts,
2822 Monitor *mon,
2823 const char *name,
2824 VLANState *vlan)
2826 const char *ifname;
2828 ifname = qemu_opt_get(opts, "ifname");
2830 if (!ifname) {
2831 qemu_error("tap: no interface name\n");
2832 return -1;
2835 if (tap_win32_init(vlan, "tap", name, ifname) == -1) {
2836 return -1;
2839 if (vlan) {
2840 vlan->nb_host_devs++;
2843 return 0;
2845 #elif !defined(_AIX)
2846 static int net_init_tap(QemuOpts *opts,
2847 Monitor *mon,
2848 const char *name,
2849 VLANState *vlan)
2851 TAPState *s;
2852 int fd, vnet_hdr;
2854 if (qemu_opt_get(opts, "fd")) {
2855 if (qemu_opt_get(opts, "ifname") ||
2856 qemu_opt_get(opts, "script") ||
2857 qemu_opt_get(opts, "downscript") ||
2858 qemu_opt_get(opts, "vnet_hdr")) {
2859 qemu_error("ifname=, script=, downscript= and vnet_hdr= is invalid with fd=\n");
2860 return -1;
2863 fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
2864 if (fd == -1) {
2865 return -1;
2868 fcntl(fd, F_SETFL, O_NONBLOCK);
2870 vnet_hdr = tap_probe_vnet_hdr(fd);
2871 } else {
2872 if (!qemu_opt_get(opts, "script")) {
2873 qemu_opt_set(opts, "script", DEFAULT_NETWORK_SCRIPT);
2876 if (!qemu_opt_get(opts, "downscript")) {
2877 qemu_opt_set(opts, "downscript", DEFAULT_NETWORK_DOWN_SCRIPT);
2880 fd = net_tap_init(opts, &vnet_hdr);
2883 s = net_tap_fd_init(vlan, "tap", name, fd, vnet_hdr);
2884 if (!s) {
2885 close(fd);
2886 return -1;
2889 if (tap_set_sndbuf(s, opts) < 0) {
2890 return -1;
2893 if (qemu_opt_get(opts, "fd")) {
2894 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
2895 } else {
2896 const char *ifname, *script, *downscript;
2898 ifname = qemu_opt_get(opts, "ifname");
2899 script = qemu_opt_get(opts, "script");
2900 downscript = qemu_opt_get(opts, "downscript");
2902 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2903 "ifname=%s,script=%s,downscript=%s",
2904 ifname, script, downscript);
2906 if (strcmp(downscript, "no") != 0) {
2907 snprintf(s->down_script, sizeof(s->down_script), "%s", downscript);
2908 snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
2912 if (vlan) {
2913 vlan->nb_host_devs++;
2916 return 0;
2918 #endif
2920 static int net_init_socket(QemuOpts *opts,
2921 Monitor *mon,
2922 const char *name,
2923 VLANState *vlan)
2925 if (qemu_opt_get(opts, "fd")) {
2926 int fd;
2928 if (qemu_opt_get(opts, "listen") ||
2929 qemu_opt_get(opts, "connect") ||
2930 qemu_opt_get(opts, "mcast")) {
2931 qemu_error("listen=, connect= and mcast= is invalid with fd=\n");
2932 return -1;
2935 fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
2936 if (fd == -1) {
2937 return -1;
2940 if (!net_socket_fd_init(vlan, "socket", name, fd, 1)) {
2941 close(fd);
2942 return -1;
2944 } else if (qemu_opt_get(opts, "listen")) {
2945 const char *listen;
2947 if (qemu_opt_get(opts, "fd") ||
2948 qemu_opt_get(opts, "connect") ||
2949 qemu_opt_get(opts, "mcast")) {
2950 qemu_error("fd=, connect= and mcast= is invalid with listen=\n");
2951 return -1;
2954 listen = qemu_opt_get(opts, "listen");
2956 if (net_socket_listen_init(vlan, "socket", name, listen) == -1) {
2957 return -1;
2959 } else if (qemu_opt_get(opts, "connect")) {
2960 const char *connect;
2962 if (qemu_opt_get(opts, "fd") ||
2963 qemu_opt_get(opts, "listen") ||
2964 qemu_opt_get(opts, "mcast")) {
2965 qemu_error("fd=, listen= and mcast= is invalid with connect=\n");
2966 return -1;
2969 connect = qemu_opt_get(opts, "connect");
2971 if (net_socket_connect_init(vlan, "socket", name, connect) == -1) {
2972 return -1;
2974 } else if (qemu_opt_get(opts, "mcast")) {
2975 const char *mcast;
2977 if (qemu_opt_get(opts, "fd") ||
2978 qemu_opt_get(opts, "connect") ||
2979 qemu_opt_get(opts, "listen")) {
2980 qemu_error("fd=, connect= and listen= is invalid with mcast=\n");
2981 return -1;
2984 mcast = qemu_opt_get(opts, "mcast");
2986 if (net_socket_mcast_init(vlan, "socket", name, mcast) == -1) {
2987 return -1;
2989 } else {
2990 qemu_error("-socket requires fd=, listen=, connect= or mcast=\n");
2991 return -1;
2994 if (vlan) {
2995 vlan->nb_host_devs++;
2998 return 0;
3001 #ifdef CONFIG_VDE
3002 static int net_init_vde(QemuOpts *opts,
3003 Monitor *mon,
3004 const char *name,
3005 VLANState *vlan)
3007 const char *sock;
3008 const char *group;
3009 int port, mode;
3011 sock = qemu_opt_get(opts, "sock");
3012 group = qemu_opt_get(opts, "group");
3014 port = qemu_opt_get_number(opts, "port", 0);
3015 mode = qemu_opt_get_number(opts, "mode", 0700);
3017 if (net_vde_init(vlan, "vde", name, sock, port, group, mode) == -1) {
3018 return -1;
3021 if (vlan) {
3022 vlan->nb_host_devs++;
3025 return 0;
3027 #endif
3029 static int net_init_dump(QemuOpts *opts,
3030 Monitor *mon,
3031 const char *name,
3032 VLANState *vlan)
3034 int len;
3035 const char *file;
3036 char def_file[128];
3038 assert(vlan);
3040 file = qemu_opt_get(opts, "file");
3041 if (!file) {
3042 snprintf(def_file, sizeof(def_file), "qemu-vlan%d.pcap", vlan->id);
3043 file = def_file;
3046 len = qemu_opt_get_size(opts, "len", 65536);
3048 return net_dump_init(vlan, "dump", name, file, len);
3051 #define NET_COMMON_PARAMS_DESC \
3053 .name = "type", \
3054 .type = QEMU_OPT_STRING, \
3055 .help = "net client type (nic, tap etc.)", \
3056 }, { \
3057 .name = "vlan", \
3058 .type = QEMU_OPT_NUMBER, \
3059 .help = "vlan number", \
3060 }, { \
3061 .name = "name", \
3062 .type = QEMU_OPT_STRING, \
3063 .help = "identifier for monitor commands", \
3066 typedef int (*net_client_init_func)(QemuOpts *opts,
3067 Monitor *mon,
3068 const char *name,
3069 VLANState *vlan);
3071 /* magic number, but compiler will warn if too small */
3072 #define NET_MAX_DESC 20
3074 static struct {
3075 const char *type;
3076 net_client_init_func init;
3077 QemuOptDesc desc[NET_MAX_DESC];
3078 } net_client_types[] = {
3080 .type = "none",
3081 .desc = {
3082 NET_COMMON_PARAMS_DESC,
3083 { /* end of list */ }
3085 }, {
3086 .type = "nic",
3087 .init = net_init_nic,
3088 .desc = {
3089 NET_COMMON_PARAMS_DESC,
3091 .name = "netdev",
3092 .type = QEMU_OPT_STRING,
3093 .help = "id of -netdev to connect to",
3096 .name = "macaddr",
3097 .type = QEMU_OPT_STRING,
3098 .help = "MAC address",
3099 }, {
3100 .name = "model",
3101 .type = QEMU_OPT_STRING,
3102 .help = "device model (e1000, rtl8139, virtio etc.)",
3103 }, {
3104 .name = "addr",
3105 .type = QEMU_OPT_STRING,
3106 .help = "PCI device address",
3107 }, {
3108 .name = "vectors",
3109 .type = QEMU_OPT_NUMBER,
3110 .help = "number of MSI-x vectors, 0 to disable MSI-X",
3112 { /* end of list */ }
3114 #ifdef CONFIG_SLIRP
3115 }, {
3116 .type = "user",
3117 .init = net_init_slirp,
3118 .desc = {
3119 NET_COMMON_PARAMS_DESC,
3121 .name = "hostname",
3122 .type = QEMU_OPT_STRING,
3123 .help = "client hostname reported by the builtin DHCP server",
3124 }, {
3125 .name = "restrict",
3126 .type = QEMU_OPT_STRING,
3127 .help = "isolate the guest from the host (y|yes|n|no)",
3128 }, {
3129 .name = "ip",
3130 .type = QEMU_OPT_STRING,
3131 .help = "legacy parameter, use net= instead",
3132 }, {
3133 .name = "net",
3134 .type = QEMU_OPT_STRING,
3135 .help = "IP address and optional netmask",
3136 }, {
3137 .name = "host",
3138 .type = QEMU_OPT_STRING,
3139 .help = "guest-visible address of the host",
3140 }, {
3141 .name = "tftp",
3142 .type = QEMU_OPT_STRING,
3143 .help = "root directory of the built-in TFTP server",
3144 }, {
3145 .name = "bootfile",
3146 .type = QEMU_OPT_STRING,
3147 .help = "BOOTP filename, for use with tftp=",
3148 }, {
3149 .name = "dhcpstart",
3150 .type = QEMU_OPT_STRING,
3151 .help = "the first of the 16 IPs the built-in DHCP server can assign",
3152 }, {
3153 .name = "dns",
3154 .type = QEMU_OPT_STRING,
3155 .help = "guest-visible address of the virtual nameserver",
3156 }, {
3157 .name = "smb",
3158 .type = QEMU_OPT_STRING,
3159 .help = "root directory of the built-in SMB server",
3160 }, {
3161 .name = "smbserver",
3162 .type = QEMU_OPT_STRING,
3163 .help = "IP address of the built-in SMB server",
3164 }, {
3165 .name = "hostfwd",
3166 .type = QEMU_OPT_STRING,
3167 .help = "guest port number to forward incoming TCP or UDP connections",
3168 }, {
3169 .name = "guestfwd",
3170 .type = QEMU_OPT_STRING,
3171 .help = "IP address and port to forward guest TCP connections",
3173 { /* end of list */ }
3175 #endif
3176 #ifdef _WIN32
3177 }, {
3178 .type = "tap",
3179 .init = net_init_tap_win32,
3180 .desc = {
3181 NET_COMMON_PARAMS_DESC,
3183 .name = "ifname",
3184 .type = QEMU_OPT_STRING,
3185 .help = "interface name",
3187 { /* end of list */ }
3189 #elif !defined(_AIX)
3190 }, {
3191 .type = "tap",
3192 .init = net_init_tap,
3193 .desc = {
3194 NET_COMMON_PARAMS_DESC,
3196 .name = "fd",
3197 .type = QEMU_OPT_STRING,
3198 .help = "file descriptor of an already opened tap",
3199 }, {
3200 .name = "ifname",
3201 .type = QEMU_OPT_STRING,
3202 .help = "interface name",
3203 }, {
3204 .name = "script",
3205 .type = QEMU_OPT_STRING,
3206 .help = "script to initialize the interface",
3207 }, {
3208 .name = "downscript",
3209 .type = QEMU_OPT_STRING,
3210 .help = "script to shut down the interface",
3211 }, {
3212 .name = "sndbuf",
3213 .type = QEMU_OPT_SIZE,
3214 .help = "send buffer limit"
3215 }, {
3216 .name = "vnet_hdr",
3217 .type = QEMU_OPT_BOOL,
3218 .help = "enable the IFF_VNET_HDR flag on the tap interface"
3220 { /* end of list */ }
3222 #endif
3223 }, {
3224 .type = "socket",
3225 .init = net_init_socket,
3226 .desc = {
3227 NET_COMMON_PARAMS_DESC,
3229 .name = "fd",
3230 .type = QEMU_OPT_STRING,
3231 .help = "file descriptor of an already opened socket",
3232 }, {
3233 .name = "listen",
3234 .type = QEMU_OPT_STRING,
3235 .help = "port number, and optional hostname, to listen on",
3236 }, {
3237 .name = "connect",
3238 .type = QEMU_OPT_STRING,
3239 .help = "port number, and optional hostname, to connect to",
3240 }, {
3241 .name = "mcast",
3242 .type = QEMU_OPT_STRING,
3243 .help = "UDP multicast address and port number",
3245 { /* end of list */ }
3247 #ifdef CONFIG_VDE
3248 }, {
3249 .type = "vde",
3250 .init = net_init_vde,
3251 .desc = {
3252 NET_COMMON_PARAMS_DESC,
3254 .name = "sock",
3255 .type = QEMU_OPT_STRING,
3256 .help = "socket path",
3257 }, {
3258 .name = "port",
3259 .type = QEMU_OPT_NUMBER,
3260 .help = "port number",
3261 }, {
3262 .name = "group",
3263 .type = QEMU_OPT_STRING,
3264 .help = "group owner of socket",
3265 }, {
3266 .name = "mode",
3267 .type = QEMU_OPT_NUMBER,
3268 .help = "permissions for socket",
3270 { /* end of list */ }
3272 #endif
3273 }, {
3274 .type = "dump",
3275 .init = net_init_dump,
3276 .desc = {
3277 NET_COMMON_PARAMS_DESC,
3279 .name = "len",
3280 .type = QEMU_OPT_SIZE,
3281 .help = "per-packet size limit (64k default)",
3282 }, {
3283 .name = "file",
3284 .type = QEMU_OPT_STRING,
3285 .help = "dump file path (default is qemu-vlan0.pcap)",
3287 { /* end of list */ }
3290 { /* end of list */ }
3293 int net_client_init(Monitor *mon, QemuOpts *opts, int is_netdev)
3295 const char *name;
3296 const char *type;
3297 int i;
3299 type = qemu_opt_get(opts, "type");
3300 if (!type) {
3301 qemu_error("No type specified for -net\n");
3302 return -1;
3305 if (is_netdev) {
3306 if (strcmp(type, "tap") != 0 &&
3307 #ifdef CONFIG_SLIRP
3308 strcmp(type, "user") != 0 &&
3309 #endif
3310 #ifdef CONFIG_VDE
3311 strcmp(type, "vde") != 0 &&
3312 #endif
3313 strcmp(type, "socket") != 0) {
3314 qemu_error("The '%s' network backend type is not valid with -netdev\n",
3315 type);
3316 return -1;
3319 if (qemu_opt_get(opts, "vlan")) {
3320 qemu_error("The 'vlan' parameter is not valid with -netdev\n");
3321 return -1;
3323 if (qemu_opt_get(opts, "name")) {
3324 qemu_error("The 'name' parameter is not valid with -netdev\n");
3325 return -1;
3327 if (!qemu_opts_id(opts)) {
3328 qemu_error("The id= parameter is required with -netdev\n");
3329 return -1;
3333 name = qemu_opts_id(opts);
3334 if (!name) {
3335 name = qemu_opt_get(opts, "name");
3338 for (i = 0; net_client_types[i].type != NULL; i++) {
3339 if (!strcmp(net_client_types[i].type, type)) {
3340 VLANState *vlan = NULL;
3342 if (qemu_opts_validate(opts, &net_client_types[i].desc[0]) == -1) {
3343 return -1;
3346 /* Do not add to a vlan if it's a -netdev or a nic with a
3347 * netdev= parameter. */
3348 if (!(is_netdev ||
3349 (strcmp(type, "nic") == 0 && qemu_opt_get(opts, "netdev")))) {
3350 vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1);
3353 if (net_client_types[i].init) {
3354 return net_client_types[i].init(opts, mon, name, vlan);
3355 } else {
3356 return 0;
3361 qemu_error("Invalid -net type '%s'\n", type);
3362 return -1;
3365 void net_client_uninit(NICInfo *nd)
3367 if (nd->vlan) {
3368 nd->vlan->nb_guest_devs--;
3370 nb_nics--;
3372 qemu_free(nd->model);
3373 qemu_free(nd->name);
3374 qemu_free(nd->devaddr);
3376 nd->used = 0;
3379 static int net_host_check_device(const char *device)
3381 int i;
3382 const char *valid_param_list[] = { "tap", "socket", "dump"
3383 #ifdef CONFIG_SLIRP
3384 ,"user"
3385 #endif
3386 #ifdef CONFIG_VDE
3387 ,"vde"
3388 #endif
3390 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
3391 if (!strncmp(valid_param_list[i], device,
3392 strlen(valid_param_list[i])))
3393 return 1;
3396 return 0;
3399 void net_host_device_add(Monitor *mon, const QDict *qdict)
3401 const char *device = qdict_get_str(qdict, "device");
3402 const char *opts_str = qdict_get_try_str(qdict, "opts");
3403 QemuOpts *opts;
3405 if (!net_host_check_device(device)) {
3406 monitor_printf(mon, "invalid host network device %s\n", device);
3407 return;
3410 opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", NULL);
3411 if (!opts) {
3412 monitor_printf(mon, "parsing network options '%s' failed\n",
3413 opts_str ? opts_str : "");
3414 return;
3417 qemu_opt_set(opts, "type", device);
3419 if (net_client_init(mon, opts, 0) < 0) {
3420 monitor_printf(mon, "adding host network device %s failed\n", device);
3424 void net_host_device_remove(Monitor *mon, const QDict *qdict)
3426 VLANClientState *vc;
3427 int vlan_id = qdict_get_int(qdict, "vlan_id");
3428 const char *device = qdict_get_str(qdict, "device");
3430 vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
3431 if (!vc) {
3432 return;
3434 if (!net_host_check_device(vc->model)) {
3435 monitor_printf(mon, "invalid host network device %s\n", device);
3436 return;
3438 qemu_del_vlan_client(vc);
3441 void net_set_boot_mask(int net_boot_mask)
3443 int i;
3445 /* Only the first four NICs may be bootable */
3446 net_boot_mask = net_boot_mask & 0xF;
3448 for (i = 0; i < nb_nics; i++) {
3449 if (net_boot_mask & (1 << i)) {
3450 nd_table[i].bootable = 1;
3451 net_boot_mask &= ~(1 << i);
3455 if (net_boot_mask) {
3456 fprintf(stderr, "Cannot boot from non-existent NIC\n");
3457 exit(1);
3461 void do_info_network(Monitor *mon)
3463 VLANState *vlan;
3465 QTAILQ_FOREACH(vlan, &vlans, next) {
3466 VLANClientState *vc;
3468 monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
3470 QTAILQ_FOREACH(vc, &vlan->clients, next) {
3471 monitor_printf(mon, " %s: %s\n", vc->name, vc->info_str);
3476 void do_set_link(Monitor *mon, const QDict *qdict)
3478 VLANState *vlan;
3479 VLANClientState *vc = NULL;
3480 const char *name = qdict_get_str(qdict, "name");
3481 const char *up_or_down = qdict_get_str(qdict, "up_or_down");
3483 QTAILQ_FOREACH(vlan, &vlans, next) {
3484 QTAILQ_FOREACH(vc, &vlan->clients, next) {
3485 if (strcmp(vc->name, name) == 0) {
3486 goto done;
3490 done:
3492 if (!vc) {
3493 monitor_printf(mon, "could not find network device '%s'\n", name);
3494 return;
3497 if (strcmp(up_or_down, "up") == 0)
3498 vc->link_down = 0;
3499 else if (strcmp(up_or_down, "down") == 0)
3500 vc->link_down = 1;
3501 else
3502 monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
3503 "valid\n", up_or_down);
3505 if (vc->link_status_changed)
3506 vc->link_status_changed(vc);
3509 void net_cleanup(void)
3511 VLANState *vlan;
3512 VLANClientState *vc, *next_vc;
3514 QTAILQ_FOREACH(vlan, &vlans, next) {
3515 QTAILQ_FOREACH_SAFE(vc, &vlan->clients, next, next_vc) {
3516 qemu_del_vlan_client(vc);
3520 QTAILQ_FOREACH_SAFE(vc, &non_vlan_clients, next, next_vc) {
3521 qemu_del_vlan_client(vc);
3525 static void net_check_clients(void)
3527 VLANState *vlan;
3529 QTAILQ_FOREACH(vlan, &vlans, next) {
3530 if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
3531 continue;
3532 if (vlan->nb_guest_devs == 0)
3533 fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
3534 if (vlan->nb_host_devs == 0)
3535 fprintf(stderr,
3536 "Warning: vlan %d is not connected to host network\n",
3537 vlan->id);
3541 static int net_init_client(QemuOpts *opts, void *dummy)
3543 if (net_client_init(NULL, opts, 0) < 0)
3544 return -1;
3545 return 0;
3548 static int net_init_netdev(QemuOpts *opts, void *dummy)
3550 return net_client_init(NULL, opts, 1);
3553 int net_init_clients(void)
3555 if (QTAILQ_EMPTY(&qemu_net_opts.head)) {
3556 /* if no clients, we use a default config */
3557 qemu_opts_set(&qemu_net_opts, NULL, "type", "nic");
3558 #ifdef CONFIG_SLIRP
3559 qemu_opts_set(&qemu_net_opts, NULL, "type", "user");
3560 #endif
3563 QTAILQ_INIT(&vlans);
3564 QTAILQ_INIT(&non_vlan_clients);
3566 if (qemu_opts_foreach(&qemu_netdev_opts, net_init_netdev, NULL, 1) == -1)
3567 return -1;
3569 if (qemu_opts_foreach(&qemu_net_opts, net_init_client, NULL, 1) == -1) {
3570 return -1;
3573 net_check_clients();
3575 return 0;
3578 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
3580 #if defined(CONFIG_SLIRP)
3581 /* handle legacy -net channel,port:chr */
3582 if (!strcmp(opts_list->name, "net") &&
3583 !strncmp(optarg, "channel,", strlen("channel,"))) {
3584 int ret;
3586 optarg += strlen("channel,");
3588 if (QTAILQ_EMPTY(&slirp_stacks)) {
3589 struct slirp_config_str *config;
3591 config = qemu_malloc(sizeof(*config));
3592 pstrcpy(config->str, sizeof(config->str), optarg);
3593 config->flags = SLIRP_CFG_LEGACY;
3594 config->next = slirp_configs;
3595 slirp_configs = config;
3596 ret = 0;
3597 } else {
3598 ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);
3601 return ret;
3603 #endif
3604 if (!qemu_opts_parse(opts_list, optarg, "type")) {
3605 return -1;
3608 return 0;