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
32 /* Needed early for CONFIG_BSD etc. */
33 #include "config-host.h"
36 #include <sys/times.h>
40 #include <sys/ioctl.h>
41 #include <sys/resource.h>
42 #include <sys/socket.h>
43 #include <netinet/in.h>
46 #include <net/if_tap.h>
49 #include <linux/if_tun.h>
51 #include <arpa/inet.h>
54 #include <sys/select.h>
57 #if defined(__FreeBSD__) || defined(__DragonFly__)
62 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
63 #include <freebsd/stdlib.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> */
75 #include <linux/ppdev.h>
76 #include <linux/parport.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>
96 #if defined(__OpenBSD__)
100 #if defined(CONFIG_VDE)
101 #include <libvdeplug.h>
104 #include "qemu-common.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"
114 #include "slirp/libslirp.h"
115 #include "qemu-queue.h"
118 static VLANState *first_vlan;
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)
128 for(i=0;i<size;i+=16) {
132 fprintf(f, "%08x ", i);
135 fprintf(f, " %02x", buf[i+j]);
142 if (c < ' ' || c > '~')
151 static int parse_macaddr(uint8_t *macaddr, const char *p)
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;
166 for(i = 0; i < 6; i++) {
167 macaddr[i] = strtol(p, (char **)&p, 16);
172 if (*p != ':' && *p != '-')
183 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
194 if (len > buf_size - 1)
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;
210 const char *src_str2;
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,',')))
221 if ((src_str = strchr(input_str,'@'))) {
226 if (parse_host_port(haddr, host_str) < 0)
230 if (!src_str || *src_str == '\0')
233 if (parse_host_port(saddr, src_str2) < 0)
244 int parse_host_port(struct sockaddr_in *saddr, const char *str)
252 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
254 saddr->sin_family = AF_INET;
255 if (buf[0] == '\0') {
256 saddr->sin_addr.s_addr = 0;
258 if (qemu_isdigit(buf[0])) {
259 if (!inet_aton(buf, &saddr->sin_addr))
262 if ((he = gethostbyname(buf)) == NULL)
264 saddr->sin_addr = *(struct in_addr *)he->h_addr;
267 port = strtol(p, (char **)&r, 0);
270 saddr->sin_port = htons(port);
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",
279 macaddr[0], macaddr[1], macaddr[2],
280 macaddr[3], macaddr[4], macaddr[5]);
283 static char *assign_name(VLANClientState *vc1, const char *model)
289 for (vlan = first_vlan; vlan; vlan = vlan->next) {
292 for (vc = vlan->first_client; vc; vc = vc->next)
293 if (vc != vc1 && strcmp(vc->model, model) == 0)
297 snprintf(buf, sizeof(buf), "%s.%d", model, id);
302 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
305 NetCanReceive *can_receive,
307 NetReceiveIOV *receive_iov,
311 VLANClientState *vc, **pvc;
312 vc = qemu_mallocz(sizeof(VLANClientState));
313 vc->model = strdup(model);
315 vc->name = strdup(name);
317 vc->name = assign_name(vc, model);
318 vc->can_receive = can_receive;
319 vc->receive = receive;
320 vc->receive_iov = receive_iov;
321 vc->cleanup = cleanup;
326 pvc = &vlan->first_client;
333 void qemu_del_vlan_client(VLANClientState *vc)
335 VLANClientState **pvc = &vc->vlan->first_client;
351 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
353 VLANClientState **pvc = &vlan->first_client;
356 if ((*pvc)->opaque == opaque)
364 static VLANClientState *
365 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
366 const char *client_str)
371 vlan = qemu_find_vlan(vlan_id, 0);
373 monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
377 for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
378 if (!strcmp(vc->name, client_str)) {
383 monitor_printf(mon, "can't find device %s on VLAN %d\n",
384 client_str, vlan_id);
390 int qemu_can_send_packet(VLANClientState *sender)
392 VLANState *vlan = sender->vlan;
395 for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
400 /* no can_receive() handler, they can always receive */
401 if (!vc->can_receive || vc->can_receive(vc)) {
409 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
414 sender->vlan->delivering = 1;
416 for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
428 len = vc->receive(vc, buf, size);
430 ret = (ret >= 0) ? ret : len;
433 sender->vlan->delivering = 0;
438 void qemu_purge_queued_packets(VLANClientState *vc)
440 VLANPacket *packet, *next;
442 QTAILQ_FOREACH_SAFE(packet, &vc->vlan->send_queue, entry, next) {
443 if (packet->sender == vc) {
444 QTAILQ_REMOVE(&vc->vlan->send_queue, packet, entry);
450 void qemu_flush_queued_packets(VLANClientState *vc)
452 while (!QTAILQ_EMPTY(&vc->vlan->send_queue)) {
456 packet = QTAILQ_FIRST(&vc->vlan->send_queue);
457 QTAILQ_REMOVE(&vc->vlan->send_queue, packet, entry);
459 ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
460 if (ret == 0 && packet->sent_cb != NULL) {
461 QTAILQ_INSERT_HEAD(&vc->vlan->send_queue, packet, entry);
466 packet->sent_cb(packet->sender, ret);
472 static void qemu_enqueue_packet(VLANClientState *sender,
473 const uint8_t *buf, int size,
474 NetPacketSent *sent_cb)
478 packet = qemu_malloc(sizeof(VLANPacket) + size);
479 packet->sender = sender;
481 packet->sent_cb = sent_cb;
482 memcpy(packet->data, buf, size);
484 QTAILQ_INSERT_TAIL(&sender->vlan->send_queue, packet, entry);
487 ssize_t qemu_send_packet_async(VLANClientState *sender,
488 const uint8_t *buf, int size,
489 NetPacketSent *sent_cb)
493 if (sender->link_down) {
498 printf("vlan %d send:\n", sender->vlan->id);
499 hex_dump(stdout, buf, size);
502 if (sender->vlan->delivering) {
503 qemu_enqueue_packet(sender, buf, size, NULL);
507 ret = qemu_deliver_packet(sender, buf, size);
508 if (ret == 0 && sent_cb != NULL) {
509 qemu_enqueue_packet(sender, buf, size, sent_cb);
513 qemu_flush_queued_packets(sender);
518 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
520 qemu_send_packet_async(vc, buf, size, NULL);
523 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
526 uint8_t buffer[4096];
530 for (i = 0; i < iovcnt; i++) {
533 len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
534 memcpy(buffer + offset, iov[i].iov_base, len);
538 return vc->receive(vc, buffer, offset);
541 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
546 for (i = 0; i < iovcnt; i++)
547 offset += iov[i].iov_len;
551 static int qemu_deliver_packet_iov(VLANClientState *sender,
552 const struct iovec *iov, int iovcnt)
557 sender->vlan->delivering = 1;
559 for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
567 ret = calc_iov_length(iov, iovcnt);
571 if (vc->receive_iov) {
572 len = vc->receive_iov(vc, iov, iovcnt);
574 len = vc_sendv_compat(vc, iov, iovcnt);
577 ret = (ret >= 0) ? ret : len;
580 sender->vlan->delivering = 0;
585 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
586 const struct iovec *iov, int iovcnt,
587 NetPacketSent *sent_cb)
593 max_len = calc_iov_length(iov, iovcnt);
595 packet = qemu_malloc(sizeof(VLANPacket) + max_len);
596 packet->sender = sender;
597 packet->sent_cb = sent_cb;
600 for (i = 0; i < iovcnt; i++) {
601 size_t len = iov[i].iov_len;
603 memcpy(packet->data + packet->size, iov[i].iov_base, len);
607 QTAILQ_INSERT_TAIL(&sender->vlan->send_queue, packet, entry);
612 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
613 const struct iovec *iov, int iovcnt,
614 NetPacketSent *sent_cb)
618 if (sender->link_down) {
619 return calc_iov_length(iov, iovcnt);
622 if (sender->vlan->delivering) {
623 return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
626 ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
627 if (ret == 0 && sent_cb != NULL) {
628 qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
632 qemu_flush_queued_packets(sender);
638 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
640 return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
643 static void config_error(Monitor *mon, const char *fmt, ...)
649 monitor_vprintf(mon, fmt, ap);
651 fprintf(stderr, "qemu: ");
652 vfprintf(stderr, fmt, ap);
658 #if defined(CONFIG_SLIRP)
660 /* slirp network adapter */
662 #define SLIRP_CFG_HOSTFWD 1
663 #define SLIRP_CFG_LEGACY 2
665 struct slirp_config_str {
666 struct slirp_config_str *next;
672 typedef struct SlirpState {
673 QTAILQ_ENTRY(SlirpState) entry;
681 static struct slirp_config_str *slirp_configs;
682 const char *legacy_tftp_prefix;
683 const char *legacy_bootp_filename;
684 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
685 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
687 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
689 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
693 static const char *legacy_smb_export;
695 static void slirp_smb(SlirpState *s, Monitor *mon, const char *exported_dir,
696 struct in_addr vserver_addr);
697 static void slirp_smb_cleanup(SlirpState *s);
699 static inline void slirp_smb_cleanup(SlirpState *s) { }
702 int slirp_can_output(void *opaque)
704 SlirpState *s = opaque;
706 return qemu_can_send_packet(s->vc);
709 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
711 SlirpState *s = opaque;
714 printf("slirp output:\n");
715 hex_dump(stdout, pkt, pkt_len);
717 qemu_send_packet(s->vc, pkt, pkt_len);
720 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
722 SlirpState *s = vc->opaque;
725 printf("slirp input:\n");
726 hex_dump(stdout, buf, size);
728 slirp_input(s->slirp, buf, size);
732 static void net_slirp_cleanup(VLANClientState *vc)
734 SlirpState *s = vc->opaque;
736 slirp_cleanup(s->slirp);
737 slirp_smb_cleanup(s);
738 QTAILQ_REMOVE(&slirp_stacks, s, entry);
742 static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
743 const char *name, int restricted,
744 const char *vnetwork, const char *vhost,
745 const char *vhostname, const char *tftp_export,
746 const char *bootfile, const char *vdhcp_start,
747 const char *vnameserver, const char *smb_export,
748 const char *vsmbserver)
750 /* default settings according to historic slirp */
751 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
752 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
753 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
754 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
755 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
757 struct in_addr smbsrv = { .s_addr = 0 };
766 tftp_export = legacy_tftp_prefix;
769 bootfile = legacy_bootp_filename;
773 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
774 if (!inet_aton(vnetwork, &net)) {
777 addr = ntohl(net.s_addr);
778 if (!(addr & 0x80000000)) {
779 mask.s_addr = htonl(0xff000000); /* class A */
780 } else if ((addr & 0xfff00000) == 0xac100000) {
781 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
782 } else if ((addr & 0xc0000000) == 0x80000000) {
783 mask.s_addr = htonl(0xffff0000); /* class B */
784 } else if ((addr & 0xffff0000) == 0xc0a80000) {
785 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
786 } else if ((addr & 0xffff0000) == 0xc6120000) {
787 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
788 } else if ((addr & 0xe0000000) == 0xe0000000) {
789 mask.s_addr = htonl(0xffffff00); /* class C */
791 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
794 if (!inet_aton(buf, &net)) {
797 shift = strtol(vnetwork, &end, 10);
799 if (!inet_aton(vnetwork, &mask)) {
802 } else if (shift < 4 || shift > 32) {
805 mask.s_addr = htonl(0xffffffff << (32 - shift));
808 net.s_addr &= mask.s_addr;
809 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
810 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
811 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
814 if (vhost && !inet_aton(vhost, &host)) {
817 if ((host.s_addr & mask.s_addr) != net.s_addr) {
821 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
824 if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
825 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
829 if (vnameserver && !inet_aton(vnameserver, &dns)) {
832 if ((dns.s_addr & mask.s_addr) != net.s_addr ||
833 dns.s_addr == host.s_addr) {
838 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
843 s = qemu_mallocz(sizeof(SlirpState));
844 s->slirp = slirp_init(restricted, net, mask, host, vhostname,
845 tftp_export, bootfile, dhcp, dns, s);
846 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
848 while (slirp_configs) {
849 struct slirp_config_str *config = slirp_configs;
851 if (config->flags & SLIRP_CFG_HOSTFWD) {
852 slirp_hostfwd(s, mon, config->str,
853 config->flags & SLIRP_CFG_LEGACY);
855 slirp_guestfwd(s, mon, config->str,
856 config->flags & SLIRP_CFG_LEGACY);
858 slirp_configs = config->next;
863 smb_export = legacy_smb_export;
866 slirp_smb(s, mon, smb_export, smbsrv);
870 s->vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive, NULL,
871 net_slirp_cleanup, s);
872 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
873 "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
877 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
883 vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
887 if (strcmp(vc->model, "user")) {
888 monitor_printf(mon, "invalid device specified\n");
893 if (QTAILQ_EMPTY(&slirp_stacks)) {
894 monitor_printf(mon, "user mode network stack not in use\n");
897 return QTAILQ_FIRST(&slirp_stacks);
901 void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict)
903 struct in_addr host_addr = { .s_addr = INADDR_ANY };
906 const char *src_str, *p;
910 const char *arg1 = qdict_get_str(qdict, "arg1");
911 const char *arg2 = qdict_get_try_str(qdict, "arg2");
912 const char *arg3 = qdict_get_try_str(qdict, "arg3");
915 s = slirp_lookup(mon, arg1, arg2);
918 s = slirp_lookup(mon, NULL, NULL);
925 if (!src_str || !src_str[0])
929 get_str_sep(buf, sizeof(buf), &p, ':');
931 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
933 } else if (!strcmp(buf, "udp")) {
939 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
942 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
948 err = slirp_remove_hostfwd(QTAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
949 host_addr, host_port);
951 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
952 err ? "removed" : "not found");
956 monitor_printf(mon, "invalid format\n");
959 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
962 struct in_addr host_addr = { .s_addr = INADDR_ANY };
963 struct in_addr guest_addr = { .s_addr = 0 };
964 int host_port, guest_port;
971 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
974 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
976 } else if (!strcmp(buf, "udp")) {
982 if (!legacy_format) {
983 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
986 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
991 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
994 host_port = strtol(buf, &end, 0);
995 if (*end != '\0' || host_port < 1 || host_port > 65535) {
999 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1002 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1006 guest_port = strtol(p, &end, 0);
1007 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1011 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1013 config_error(mon, "could not set up host forwarding rule '%s'\n",
1019 config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
1022 void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict)
1024 const char *redir_str;
1026 const char *arg1 = qdict_get_str(qdict, "arg1");
1027 const char *arg2 = qdict_get_try_str(qdict, "arg2");
1028 const char *arg3 = qdict_get_try_str(qdict, "arg3");
1031 s = slirp_lookup(mon, arg1, arg2);
1034 s = slirp_lookup(mon, NULL, NULL);
1038 slirp_hostfwd(s, mon, redir_str, 0);
1043 void net_slirp_redir(const char *redir_str)
1045 struct slirp_config_str *config;
1047 if (QTAILQ_EMPTY(&slirp_stacks)) {
1048 config = qemu_malloc(sizeof(*config));
1049 pstrcpy(config->str, sizeof(config->str), redir_str);
1050 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1051 config->next = slirp_configs;
1052 slirp_configs = config;
1056 slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), NULL, redir_str, 1);
1061 /* automatic user mode samba server configuration */
1062 static void slirp_smb_cleanup(SlirpState *s)
1066 if (s->smb_dir[0] != '\0') {
1067 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1069 s->smb_dir[0] = '\0';
1073 static void slirp_smb(SlirpState* s, Monitor *mon, const char *exported_dir,
1074 struct in_addr vserver_addr)
1076 static int instance;
1078 char smb_cmdline[128];
1081 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1082 (long)getpid(), instance++);
1083 if (mkdir(s->smb_dir, 0700) < 0) {
1084 config_error(mon, "could not create samba server dir '%s'\n",
1088 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1090 f = fopen(smb_conf, "w");
1092 slirp_smb_cleanup(s);
1093 config_error(mon, "could not create samba server "
1094 "configuration file '%s'\n", smb_conf);
1101 "socket address=127.0.0.1\n"
1102 "pid directory=%s\n"
1103 "lock directory=%s\n"
1104 "log file=%s/log.smbd\n"
1105 "smb passwd file=%s/smbpasswd\n"
1106 "security = share\n"
1120 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1121 SMBD_COMMAND, smb_conf);
1123 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) {
1124 slirp_smb_cleanup(s);
1125 config_error(mon, "conflicting/invalid smbserver address\n");
1129 /* automatic user mode samba server configuration (legacy interface) */
1130 void net_slirp_smb(const char *exported_dir)
1132 struct in_addr vserver_addr = { .s_addr = 0 };
1134 if (legacy_smb_export) {
1135 fprintf(stderr, "-smb given twice\n");
1138 legacy_smb_export = exported_dir;
1139 if (!QTAILQ_EMPTY(&slirp_stacks)) {
1140 slirp_smb(QTAILQ_FIRST(&slirp_stacks), NULL, exported_dir,
1145 #endif /* !defined(_WIN32) */
1148 CharDriverState *hd;
1149 struct in_addr server;
1154 static int guestfwd_can_read(void *opaque)
1156 struct GuestFwd *fwd = opaque;
1157 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1160 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1162 struct GuestFwd *fwd = opaque;
1163 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1166 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
1169 struct in_addr server = { .s_addr = 0 };
1170 struct GuestFwd *fwd;
1177 if (legacy_format) {
1178 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1182 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1185 if (strcmp(buf, "tcp") && buf[0] != '\0') {
1188 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1191 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1194 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1198 port = strtol(buf, &end, 10);
1199 if (*end != '\0' || port < 1 || port > 65535) {
1203 fwd = qemu_malloc(sizeof(struct GuestFwd));
1204 snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1205 fwd->hd = qemu_chr_open(buf, p, NULL);
1207 config_error(mon, "could not open guest forwarding device '%s'\n",
1213 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
1214 config_error(mon, "conflicting/invalid host:port in guest forwarding "
1215 "rule '%s'\n", config_str);
1219 fwd->server = server;
1221 fwd->slirp = s->slirp;
1223 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1228 config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1231 void do_info_usernet(Monitor *mon)
1235 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
1236 monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1237 slirp_connection_info(s->slirp, mon);
1241 #endif /* CONFIG_SLIRP */
1243 #if !defined(_WIN32)
1245 typedef struct TAPState {
1246 VLANClientState *vc;
1248 char down_script[1024];
1249 char down_script_arg[128];
1251 unsigned int read_poll : 1;
1252 unsigned int write_poll : 1;
1255 static int launch_script(const char *setup_script, const char *ifname, int fd);
1257 static int tap_can_send(void *opaque);
1258 static void tap_send(void *opaque);
1259 static void tap_writable(void *opaque);
1261 static void tap_update_fd_handler(TAPState *s)
1263 qemu_set_fd_handler2(s->fd,
1264 s->read_poll ? tap_can_send : NULL,
1265 s->read_poll ? tap_send : NULL,
1266 s->write_poll ? tap_writable : NULL,
1270 static void tap_read_poll(TAPState *s, int enable)
1272 s->read_poll = !!enable;
1273 tap_update_fd_handler(s);
1276 static void tap_write_poll(TAPState *s, int enable)
1278 s->write_poll = !!enable;
1279 tap_update_fd_handler(s);
1282 static void tap_writable(void *opaque)
1284 TAPState *s = opaque;
1286 tap_write_poll(s, 0);
1288 qemu_flush_queued_packets(s->vc);
1291 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1294 TAPState *s = vc->opaque;
1298 len = writev(s->fd, iov, iovcnt);
1299 } while (len == -1 && errno == EINTR);
1301 if (len == -1 && errno == EAGAIN) {
1302 tap_write_poll(s, 1);
1309 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1311 TAPState *s = vc->opaque;
1315 len = write(s->fd, buf, size);
1316 } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1321 static int tap_can_send(void *opaque)
1323 TAPState *s = opaque;
1325 return qemu_can_send_packet(s->vc);
1329 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1334 sbuf.maxlen = maxlen;
1335 sbuf.buf = (char *)buf;
1337 return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1340 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1342 return read(tapfd, buf, maxlen);
1346 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1348 TAPState *s = vc->opaque;
1349 tap_read_poll(s, 1);
1352 static void tap_send(void *opaque)
1354 TAPState *s = opaque;
1358 size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1363 size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1365 tap_read_poll(s, 0);
1371 /* sndbuf should be set to a value lower than the tx queue
1372 * capacity of any destination network interface.
1373 * Ethernet NICs generally have txqueuelen=1000, so 1Mb is
1374 * a good default, given a 1500 byte MTU.
1376 #define TAP_DEFAULT_SNDBUF 1024*1024
1378 static void tap_set_sndbuf(TAPState *s, const char *sndbuf_str, Monitor *mon)
1380 int sndbuf = TAP_DEFAULT_SNDBUF;
1383 sndbuf = atoi(sndbuf_str);
1390 if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1 && sndbuf_str) {
1391 config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1396 static void tap_set_sndbuf(TAPState *s, const char *sndbuf_str, Monitor *mon)
1399 config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1402 #endif /* TUNSETSNDBUF */
1404 static void tap_cleanup(VLANClientState *vc)
1406 TAPState *s = vc->opaque;
1408 qemu_purge_queued_packets(vc);
1410 if (s->down_script[0])
1411 launch_script(s->down_script, s->down_script_arg, s->fd);
1413 tap_read_poll(s, 0);
1414 tap_write_poll(s, 0);
1421 static TAPState *net_tap_fd_init(VLANState *vlan,
1428 s = qemu_mallocz(sizeof(TAPState));
1430 s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1431 tap_receive_iov, tap_cleanup, s);
1432 tap_read_poll(s, 1);
1433 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1437 #if defined (CONFIG_BSD) || defined (__FreeBSD_kernel__)
1438 static int tap_open(char *ifname, int ifname_size)
1444 TFR(fd = open("/dev/tap", O_RDWR));
1446 fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1451 dev = devname(s.st_rdev, S_IFCHR);
1452 pstrcpy(ifname, ifname_size, dev);
1454 fcntl(fd, F_SETFL, O_NONBLOCK);
1457 #elif defined(__sun__)
1458 #define TUNNEWPPA (('T'<<16) | 0x0001)
1460 * Allocate TAP device, returns opened fd.
1461 * Stores dev name in the first arg(must be large enough).
1463 static int tap_alloc(char *dev, size_t dev_size)
1465 int tap_fd, if_fd, ppa = -1;
1466 static int ip_fd = 0;
1469 static int arp_fd = 0;
1470 int ip_muxid, arp_muxid;
1471 struct strioctl strioc_if, strioc_ppa;
1472 int link_type = I_PLINK;;
1474 char actual_name[32] = "";
1476 memset(&ifr, 0x0, sizeof(ifr));
1480 while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1484 /* Check if IP device was opened */
1488 TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1490 syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1494 TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1496 syslog(LOG_ERR, "Can't open /dev/tap");
1500 /* Assign a new PPA and get its unit number. */
1501 strioc_ppa.ic_cmd = TUNNEWPPA;
1502 strioc_ppa.ic_timout = 0;
1503 strioc_ppa.ic_len = sizeof(ppa);
1504 strioc_ppa.ic_dp = (char *)&ppa;
1505 if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1506 syslog (LOG_ERR, "Can't assign new interface");
1508 TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1510 syslog(LOG_ERR, "Can't open /dev/tap (2)");
1513 if(ioctl(if_fd, I_PUSH, "ip") < 0){
1514 syslog(LOG_ERR, "Can't push IP module");
1518 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1519 syslog(LOG_ERR, "Can't get flags\n");
1521 snprintf (actual_name, 32, "tap%d", ppa);
1522 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1525 /* Assign ppa according to the unit number returned by tun device */
1527 if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1528 syslog (LOG_ERR, "Can't set PPA %d", ppa);
1529 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1530 syslog (LOG_ERR, "Can't get flags\n");
1531 /* Push arp module to if_fd */
1532 if (ioctl (if_fd, I_PUSH, "arp") < 0)
1533 syslog (LOG_ERR, "Can't push ARP module (2)");
1535 /* Push arp module to ip_fd */
1536 if (ioctl (ip_fd, I_POP, NULL) < 0)
1537 syslog (LOG_ERR, "I_POP failed\n");
1538 if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1539 syslog (LOG_ERR, "Can't push ARP module (3)\n");
1541 TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1543 syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1545 /* Set ifname to arp */
1546 strioc_if.ic_cmd = SIOCSLIFNAME;
1547 strioc_if.ic_timout = 0;
1548 strioc_if.ic_len = sizeof(ifr);
1549 strioc_if.ic_dp = (char *)𝔦
1550 if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1551 syslog (LOG_ERR, "Can't set ifname to arp\n");
1554 if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1555 syslog(LOG_ERR, "Can't link TAP device to IP");
1559 if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1560 syslog (LOG_ERR, "Can't link TAP device to ARP");
1564 memset(&ifr, 0x0, sizeof(ifr));
1565 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1566 ifr.lifr_ip_muxid = ip_muxid;
1567 ifr.lifr_arp_muxid = arp_muxid;
1569 if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1571 ioctl (ip_fd, I_PUNLINK , arp_muxid);
1572 ioctl (ip_fd, I_PUNLINK, ip_muxid);
1573 syslog (LOG_ERR, "Can't set multiplexor id");
1576 snprintf(dev, dev_size, "tap%d", ppa);
1580 static int tap_open(char *ifname, int ifname_size)
1584 if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1585 fprintf(stderr, "Cannot allocate TAP device\n");
1588 pstrcpy(ifname, ifname_size, dev);
1589 fcntl(fd, F_SETFL, O_NONBLOCK);
1592 #elif defined (_AIX)
1593 static int tap_open(char *ifname, int ifname_size)
1595 fprintf (stderr, "no tap on AIX\n");
1599 static int tap_open(char *ifname, int ifname_size)
1604 TFR(fd = open("/dev/net/tun", O_RDWR));
1606 fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1609 memset(&ifr, 0, sizeof(ifr));
1610 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1611 if (ifname[0] != '\0')
1612 pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1614 pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1615 ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1617 fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1621 pstrcpy(ifname, ifname_size, ifr.ifr_name);
1622 fcntl(fd, F_SETFL, O_NONBLOCK);
1627 static int launch_script(const char *setup_script, const char *ifname, int fd)
1629 sigset_t oldmask, mask;
1635 sigaddset(&mask, SIGCHLD);
1636 sigprocmask(SIG_BLOCK, &mask, &oldmask);
1638 /* try to launch network script */
1641 int open_max = sysconf(_SC_OPEN_MAX), i;
1643 for (i = 0; i < open_max; i++) {
1644 if (i != STDIN_FILENO &&
1645 i != STDOUT_FILENO &&
1646 i != STDERR_FILENO &&
1652 *parg++ = (char *)setup_script;
1653 *parg++ = (char *)ifname;
1655 execv(setup_script, args);
1657 } else if (pid > 0) {
1658 while (waitpid(pid, &status, 0) != pid) {
1661 sigprocmask(SIG_SETMASK, &oldmask, NULL);
1663 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1667 fprintf(stderr, "%s: could not launch network script\n", setup_script);
1671 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1672 const char *name, const char *ifname1,
1673 const char *setup_script, const char *down_script)
1679 if (ifname1 != NULL)
1680 pstrcpy(ifname, sizeof(ifname), ifname1);
1683 TFR(fd = tap_open(ifname, sizeof(ifname)));
1687 if (!setup_script || !strcmp(setup_script, "no"))
1689 if (setup_script[0] != '\0' &&
1690 launch_script(setup_script, ifname, fd)) {
1693 s = net_tap_fd_init(vlan, model, name, fd);
1694 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1695 "ifname=%s,script=%s,downscript=%s",
1696 ifname, setup_script, down_script);
1697 if (down_script && strcmp(down_script, "no")) {
1698 snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1699 snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1704 #endif /* !_WIN32 */
1706 #if defined(CONFIG_VDE)
1707 typedef struct VDEState {
1708 VLANClientState *vc;
1712 static void vde_to_qemu(void *opaque)
1714 VDEState *s = opaque;
1718 size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1720 qemu_send_packet(s->vc, buf, size);
1724 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1726 VDEState *s = vc->opaque;
1730 ret = vde_send(s->vde, (const char *)buf, size, 0);
1731 } while (ret < 0 && errno == EINTR);
1736 static void vde_cleanup(VLANClientState *vc)
1738 VDEState *s = vc->opaque;
1739 qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1744 static int net_vde_init(VLANState *vlan, const char *model,
1745 const char *name, const char *sock,
1746 int port, const char *group, int mode)
1749 char *init_group = strlen(group) ? (char *)group : NULL;
1750 char *init_sock = strlen(sock) ? (char *)sock : NULL;
1752 struct vde_open_args args = {
1754 .group = init_group,
1758 s = qemu_mallocz(sizeof(VDEState));
1759 s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1764 s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1765 NULL, vde_cleanup, s);
1766 qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1767 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1768 sock, vde_datafd(s->vde));
1773 /* network connection */
1774 typedef struct NetSocketState {
1775 VLANClientState *vc;
1777 int state; /* 0 = getting length, 1 = getting data */
1779 unsigned int packet_len;
1781 struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1784 typedef struct NetSocketListenState {
1789 } NetSocketListenState;
1791 /* XXX: we consider we can send the whole packet without blocking */
1792 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1794 NetSocketState *s = vc->opaque;
1798 send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1799 return send_all(s->fd, buf, size);
1802 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1804 NetSocketState *s = vc->opaque;
1806 return sendto(s->fd, (const void *)buf, size, 0,
1807 (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1810 static void net_socket_send(void *opaque)
1812 NetSocketState *s = opaque;
1818 size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1820 err = socket_error();
1821 if (err != EWOULDBLOCK)
1823 } else if (size == 0) {
1824 /* end of connection */
1826 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1832 /* reassemble a packet from the network */
1838 memcpy(s->buf + s->index, buf, l);
1842 if (s->index == 4) {
1844 s->packet_len = ntohl(*(uint32_t *)s->buf);
1850 l = s->packet_len - s->index;
1853 if (s->index + l <= sizeof(s->buf)) {
1854 memcpy(s->buf + s->index, buf, l);
1856 fprintf(stderr, "serious error: oversized packet received,"
1857 "connection terminated.\n");
1865 if (s->index >= s->packet_len) {
1866 qemu_send_packet(s->vc, s->buf, s->packet_len);
1875 static void net_socket_send_dgram(void *opaque)
1877 NetSocketState *s = opaque;
1880 size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1884 /* end of connection */
1885 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1888 qemu_send_packet(s->vc, s->buf, size);
1891 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1896 if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1897 fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1898 inet_ntoa(mcastaddr->sin_addr),
1899 (int)ntohl(mcastaddr->sin_addr.s_addr));
1903 fd = socket(PF_INET, SOCK_DGRAM, 0);
1905 perror("socket(PF_INET, SOCK_DGRAM)");
1910 ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1911 (const char *)&val, sizeof(val));
1913 perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1917 ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1923 /* Add host to multicast group */
1924 imr.imr_multiaddr = mcastaddr->sin_addr;
1925 imr.imr_interface.s_addr = htonl(INADDR_ANY);
1927 ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1928 (const char *)&imr, sizeof(struct ip_mreq));
1930 perror("setsockopt(IP_ADD_MEMBERSHIP)");
1934 /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1936 ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1937 (const char *)&val, sizeof(val));
1939 perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1943 socket_set_nonblock(fd);
1951 static void net_socket_cleanup(VLANClientState *vc)
1953 NetSocketState *s = vc->opaque;
1954 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1959 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1962 int fd, int is_connected)
1964 struct sockaddr_in saddr;
1966 socklen_t saddr_len;
1969 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1970 * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1971 * by ONLY ONE process: we must "clone" this dgram socket --jjo
1975 if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1977 if (saddr.sin_addr.s_addr==0) {
1978 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1982 /* clone dgram socket */
1983 newfd = net_socket_mcast_create(&saddr);
1985 /* error already reported by net_socket_mcast_create() */
1989 /* clone newfd to fd, close newfd */
1994 fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1995 fd, strerror(errno));
2000 s = qemu_mallocz(sizeof(NetSocketState));
2003 s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
2004 NULL, net_socket_cleanup, s);
2005 qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
2007 /* mcast: save bound address as dst */
2008 if (is_connected) s->dgram_dst=saddr;
2010 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2011 "socket: fd=%d (%s mcast=%s:%d)",
2012 fd, is_connected? "cloned" : "",
2013 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2017 static void net_socket_connect(void *opaque)
2019 NetSocketState *s = opaque;
2020 qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2023 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2026 int fd, int is_connected)
2029 s = qemu_mallocz(sizeof(NetSocketState));
2031 s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
2032 NULL, net_socket_cleanup, s);
2033 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2034 "socket: fd=%d", fd);
2036 net_socket_connect(s);
2038 qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2043 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2044 const char *model, const char *name,
2045 int fd, int is_connected)
2047 int so_type = -1, optlen=sizeof(so_type);
2049 if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2050 (socklen_t *)&optlen)< 0) {
2051 fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2056 return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2058 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2060 /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2061 fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2062 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2067 static void net_socket_accept(void *opaque)
2069 NetSocketListenState *s = opaque;
2071 struct sockaddr_in saddr;
2076 len = sizeof(saddr);
2077 fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2078 if (fd < 0 && errno != EINTR) {
2080 } else if (fd >= 0) {
2084 s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2088 snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2089 "socket: connection from %s:%d",
2090 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2094 static int net_socket_listen_init(VLANState *vlan,
2097 const char *host_str)
2099 NetSocketListenState *s;
2101 struct sockaddr_in saddr;
2103 if (parse_host_port(&saddr, host_str) < 0)
2106 s = qemu_mallocz(sizeof(NetSocketListenState));
2108 fd = socket(PF_INET, SOCK_STREAM, 0);
2113 socket_set_nonblock(fd);
2115 /* allow fast reuse */
2117 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2119 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2124 ret = listen(fd, 0);
2130 s->model = strdup(model);
2131 s->name = name ? strdup(name) : NULL;
2133 qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2137 static int net_socket_connect_init(VLANState *vlan,
2140 const char *host_str)
2143 int fd, connected, ret, err;
2144 struct sockaddr_in saddr;
2146 if (parse_host_port(&saddr, host_str) < 0)
2149 fd = socket(PF_INET, SOCK_STREAM, 0);
2154 socket_set_nonblock(fd);
2158 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2160 err = socket_error();
2161 if (err == EINTR || err == EWOULDBLOCK) {
2162 } else if (err == EINPROGRESS) {
2165 } else if (err == WSAEALREADY) {
2178 s = net_socket_fd_init(vlan, model, name, fd, connected);
2181 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2182 "socket: connect to %s:%d",
2183 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2187 static int net_socket_mcast_init(VLANState *vlan,
2190 const char *host_str)
2194 struct sockaddr_in saddr;
2196 if (parse_host_port(&saddr, host_str) < 0)
2200 fd = net_socket_mcast_create(&saddr);
2204 s = net_socket_fd_init(vlan, model, name, fd, 0);
2208 s->dgram_dst = saddr;
2210 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2211 "socket: mcast=%s:%d",
2212 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2217 typedef struct DumpState {
2218 VLANClientState *pcap_vc;
2223 #define PCAP_MAGIC 0xa1b2c3d4
2225 struct pcap_file_hdr {
2227 uint16_t version_major;
2228 uint16_t version_minor;
2235 struct pcap_sf_pkthdr {
2244 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2246 DumpState *s = vc->opaque;
2247 struct pcap_sf_pkthdr hdr;
2251 /* Early return in case of previous error. */
2256 ts = muldiv64(qemu_get_clock(vm_clock), 1000000, get_ticks_per_sec());
2257 caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2259 hdr.ts.tv_sec = ts / 1000000;
2260 hdr.ts.tv_usec = ts % 1000000;
2261 hdr.caplen = caplen;
2263 if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2264 write(s->fd, buf, caplen) != caplen) {
2265 qemu_log("-net dump write error - stop dump\n");
2273 static void net_dump_cleanup(VLANClientState *vc)
2275 DumpState *s = vc->opaque;
2281 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2282 const char *name, const char *filename, int len)
2284 struct pcap_file_hdr hdr;
2287 s = qemu_malloc(sizeof(DumpState));
2289 s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2291 config_error(mon, "-net dump: can't open %s\n", filename);
2295 s->pcap_caplen = len;
2297 hdr.magic = PCAP_MAGIC;
2298 hdr.version_major = 2;
2299 hdr.version_minor = 4;
2302 hdr.snaplen = s->pcap_caplen;
2305 if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2306 config_error(mon, "-net dump write error: %s\n", strerror(errno));
2312 s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2313 net_dump_cleanup, s);
2314 snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2315 "dump to %s (len=%d)", filename, len);
2319 /* find or alloc a new VLAN */
2320 VLANState *qemu_find_vlan(int id, int allocate)
2322 VLANState **pvlan, *vlan;
2323 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2330 vlan = qemu_mallocz(sizeof(VLANState));
2332 QTAILQ_INIT(&vlan->send_queue);
2334 pvlan = &first_vlan;
2335 while (*pvlan != NULL)
2336 pvlan = &(*pvlan)->next;
2341 static int nic_get_free_idx(void)
2345 for (index = 0; index < MAX_NICS; index++)
2346 if (!nd_table[index].used)
2351 void qemu_check_nic_model(NICInfo *nd, const char *model)
2353 const char *models[2];
2358 qemu_check_nic_model_list(nd, models, model);
2361 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2362 const char *default_model)
2364 int i, exit_status = 0;
2367 nd->model = strdup(default_model);
2369 if (strcmp(nd->model, "?") != 0) {
2370 for (i = 0 ; models[i]; i++)
2371 if (strcmp(nd->model, models[i]) == 0)
2374 fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2378 fprintf(stderr, "qemu: Supported NIC models: ");
2379 for (i = 0 ; models[i]; i++)
2380 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2385 static int net_handle_fd_param(Monitor *mon, const char *param)
2387 if (!qemu_isdigit(param[0])) {
2390 fd = monitor_get_fd(mon, param);
2392 config_error(mon, "No file descriptor named %s found", param);
2398 return strtol(param, NULL, 0);
2402 int net_client_init(Monitor *mon, const char *device, const char *p)
2410 if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2411 vlan_id = strtol(buf, NULL, 0);
2413 vlan = qemu_find_vlan(vlan_id, 1);
2415 if (get_param_value(buf, sizeof(buf), "name", p)) {
2416 name = qemu_strdup(buf);
2418 if (!strcmp(device, "nic")) {
2419 static const char * const nic_params[] = {
2420 "vlan", "name", "macaddr", "model", "addr", "id", "vectors", NULL
2424 int idx = nic_get_free_idx();
2426 if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2427 config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2431 if (idx == -1 || nb_nics >= MAX_NICS) {
2432 config_error(mon, "Too Many NICs\n");
2436 nd = &nd_table[idx];
2437 macaddr = nd->macaddr;
2443 macaddr[5] = 0x56 + idx;
2445 if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2446 if (parse_macaddr(macaddr, buf) < 0) {
2447 config_error(mon, "invalid syntax for ethernet address\n");
2452 if (get_param_value(buf, sizeof(buf), "model", p)) {
2453 nd->model = strdup(buf);
2455 if (get_param_value(buf, sizeof(buf), "addr", p)) {
2456 nd->devaddr = strdup(buf);
2458 if (get_param_value(buf, sizeof(buf), "id", p)) {
2459 nd->id = strdup(buf);
2461 nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2462 if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2464 long vectors = strtol(buf, &endptr, 0);
2466 config_error(mon, "invalid syntax for # of vectors\n");
2470 if (vectors < 0 || vectors > 0x7ffffff) {
2471 config_error(mon, "invalid # of vectors\n");
2475 nd->nvectors = vectors;
2482 vlan->nb_guest_devs++;
2485 if (!strcmp(device, "none")) {
2487 config_error(mon, "'none' takes no parameters\n");
2491 /* does nothing. It is needed to signal that no network cards
2496 if (!strcmp(device, "user")) {
2497 static const char * const slirp_params[] = {
2498 "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2499 "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2500 "hostfwd", "guestfwd", NULL
2502 struct slirp_config_str *config;
2506 char *vhostname = NULL;
2507 char *tftp_export = NULL;
2508 char *bootfile = NULL;
2509 char *vdhcp_start = NULL;
2510 char *vnamesrv = NULL;
2511 char *smb_export = NULL;
2512 char *vsmbsrv = NULL;
2515 if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2516 config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2520 if (get_param_value(buf, sizeof(buf), "ip", p)) {
2521 int vnet_buflen = strlen(buf) + strlen("/24") + 1;
2522 /* emulate legacy parameter */
2523 vnet = qemu_malloc(vnet_buflen);
2524 pstrcpy(vnet, vnet_buflen, buf);
2525 pstrcat(vnet, vnet_buflen, "/24");
2527 if (get_param_value(buf, sizeof(buf), "net", p)) {
2528 vnet = qemu_strdup(buf);
2530 if (get_param_value(buf, sizeof(buf), "host", p)) {
2531 vhost = qemu_strdup(buf);
2533 if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2534 vhostname = qemu_strdup(buf);
2536 if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2537 restricted = (buf[0] == 'y') ? 1 : 0;
2539 if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2540 vdhcp_start = qemu_strdup(buf);
2542 if (get_param_value(buf, sizeof(buf), "dns", p)) {
2543 vnamesrv = qemu_strdup(buf);
2545 if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2546 tftp_export = qemu_strdup(buf);
2548 if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2549 bootfile = qemu_strdup(buf);
2551 if (get_param_value(buf, sizeof(buf), "smb", p)) {
2552 smb_export = qemu_strdup(buf);
2553 if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2554 vsmbsrv = qemu_strdup(buf);
2559 config = qemu_malloc(sizeof(*config));
2560 if (!get_next_param_value(config->str, sizeof(config->str),
2564 config->flags = SLIRP_CFG_HOSTFWD;
2565 config->next = slirp_configs;
2566 slirp_configs = config;
2571 config = qemu_malloc(sizeof(*config));
2572 if (!get_next_param_value(config->str, sizeof(config->str),
2577 config->next = slirp_configs;
2578 slirp_configs = config;
2582 vlan->nb_host_devs++;
2583 ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2584 vhostname, tftp_export, bootfile, vdhcp_start,
2585 vnamesrv, smb_export, vsmbsrv);
2588 qemu_free(vhostname);
2589 qemu_free(tftp_export);
2590 qemu_free(bootfile);
2591 qemu_free(vdhcp_start);
2592 qemu_free(vnamesrv);
2593 qemu_free(smb_export);
2595 } else if (!strcmp(device, "channel")) {
2596 if (QTAILQ_EMPTY(&slirp_stacks)) {
2597 struct slirp_config_str *config;
2599 config = qemu_malloc(sizeof(*config));
2600 pstrcpy(config->str, sizeof(config->str), p);
2601 config->flags = SLIRP_CFG_LEGACY;
2602 config->next = slirp_configs;
2603 slirp_configs = config;
2605 slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), mon, p, 1);
2611 if (!strcmp(device, "tap")) {
2612 static const char * const tap_params[] = {
2613 "vlan", "name", "ifname", NULL
2617 if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2618 config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2622 if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2623 config_error(mon, "tap: no interface name\n");
2627 vlan->nb_host_devs++;
2628 ret = tap_win32_init(vlan, device, name, ifname);
2630 #elif defined (_AIX)
2632 if (!strcmp(device, "tap")) {
2633 char ifname[64], chkbuf[64];
2634 char setup_script[1024], down_script[1024];
2637 vlan->nb_host_devs++;
2638 if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2639 static const char * const fd_params[] = {
2640 "vlan", "name", "fd", "sndbuf", NULL
2643 if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2644 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2647 fd = net_handle_fd_param(mon, buf);
2651 fcntl(fd, F_SETFL, O_NONBLOCK);
2652 s = net_tap_fd_init(vlan, device, name, fd);
2657 static const char * const tap_params[] = {
2658 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2660 if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2661 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2665 if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2668 if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2669 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2671 if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2672 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2674 s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2677 const char *sndbuf_str = NULL;
2678 if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2681 tap_set_sndbuf(s, sndbuf_str, mon);
2688 if (!strcmp(device, "socket")) {
2690 if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2691 static const char * const fd_params[] = {
2692 "vlan", "name", "fd", NULL
2696 if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2697 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2700 fd = net_handle_fd_param(mon, buf);
2704 if (!net_socket_fd_init(vlan, device, name, fd, 1)) {
2709 } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2710 static const char * const listen_params[] = {
2711 "vlan", "name", "listen", NULL
2713 if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2714 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2718 ret = net_socket_listen_init(vlan, device, name, buf);
2719 } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2720 static const char * const connect_params[] = {
2721 "vlan", "name", "connect", NULL
2723 if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2724 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2728 ret = net_socket_connect_init(vlan, device, name, buf);
2729 } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2730 static const char * const mcast_params[] = {
2731 "vlan", "name", "mcast", NULL
2733 if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2734 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2738 ret = net_socket_mcast_init(vlan, device, name, buf);
2740 config_error(mon, "Unknown socket options: %s\n", p);
2744 vlan->nb_host_devs++;
2747 if (!strcmp(device, "vde")) {
2748 static const char * const vde_params[] = {
2749 "vlan", "name", "sock", "port", "group", "mode", NULL
2751 char vde_sock[1024], vde_group[512];
2752 int vde_port, vde_mode;
2754 if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2755 config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2759 vlan->nb_host_devs++;
2760 if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2763 if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2764 vde_port = strtol(buf, NULL, 10);
2768 if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2769 vde_group[0] = '\0';
2771 if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2772 vde_mode = strtol(buf, NULL, 8);
2776 ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2779 if (!strcmp(device, "dump")) {
2782 if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2783 len = strtol(buf, NULL, 0);
2785 if (!get_param_value(buf, sizeof(buf), "file", p)) {
2786 snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2788 ret = net_dump_init(mon, vlan, device, name, buf, len);
2790 config_error(mon, "Unknown network device: %s\n", device);
2795 config_error(mon, "Could not initialize device '%s'\n", device);
2802 void net_client_uninit(NICInfo *nd)
2804 nd->vlan->nb_guest_devs--;
2807 qemu_free((void *)nd->model);
2808 qemu_free((void *)nd->name);
2809 qemu_free((void *)nd->devaddr);
2810 qemu_free((void *)nd->id);
2812 memset(nd, 0, sizeof(*nd));
2815 static int net_host_check_device(const char *device)
2818 const char *valid_param_list[] = { "tap", "socket", "dump"
2826 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2827 if (!strncmp(valid_param_list[i], device,
2828 strlen(valid_param_list[i])))
2835 void net_host_device_add(Monitor *mon, const QDict *qdict)
2837 const char *device = qdict_get_str(qdict, "device");
2838 const char *opts = qdict_get_try_str(qdict, "opts");
2840 if (!net_host_check_device(device)) {
2841 monitor_printf(mon, "invalid host network device %s\n", device);
2844 if (net_client_init(mon, device, opts ? opts : "") < 0) {
2845 monitor_printf(mon, "adding host network device %s failed\n", device);
2849 void net_host_device_remove(Monitor *mon, const QDict *qdict)
2851 VLANClientState *vc;
2852 int vlan_id = qdict_get_int(qdict, "vlan_id");
2853 const char *device = qdict_get_str(qdict, "device");
2855 vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
2859 if (!net_host_check_device(vc->model)) {
2860 monitor_printf(mon, "invalid host network device %s\n", device);
2863 qemu_del_vlan_client(vc);
2866 int net_client_parse(const char *str)
2874 while (*p != '\0' && *p != ',') {
2875 if ((q - device) < sizeof(device) - 1)
2883 return net_client_init(NULL, device, p);
2886 void net_set_boot_mask(int net_boot_mask)
2890 /* Only the first four NICs may be bootable */
2891 net_boot_mask = net_boot_mask & 0xF;
2893 for (i = 0; i < nb_nics; i++) {
2894 if (net_boot_mask & (1 << i)) {
2895 nd_table[i].bootable = 1;
2896 net_boot_mask &= ~(1 << i);
2900 if (net_boot_mask) {
2901 fprintf(stderr, "Cannot boot from non-existent NIC\n");
2906 void do_info_network(Monitor *mon)
2909 VLANClientState *vc;
2911 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2912 monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2913 for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2914 monitor_printf(mon, " %s: %s\n", vc->name, vc->info_str);
2918 void do_set_link(Monitor *mon, const QDict *qdict)
2921 VLANClientState *vc = NULL;
2922 const char *name = qdict_get_str(qdict, "name");
2923 const char *up_or_down = qdict_get_str(qdict, "up_or_down");
2925 for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2926 for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2927 if (strcmp(vc->name, name) == 0)
2932 monitor_printf(mon, "could not find network device '%s'\n", name);
2936 if (strcmp(up_or_down, "up") == 0)
2938 else if (strcmp(up_or_down, "down") == 0)
2941 monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2942 "valid\n", up_or_down);
2944 if (vc->link_status_changed)
2945 vc->link_status_changed(vc);
2948 void net_cleanup(void)
2952 /* close network clients */
2953 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2954 VLANClientState *vc = vlan->first_client;
2957 VLANClientState *next = vc->next;
2959 qemu_del_vlan_client(vc);
2966 void net_client_check(void)
2970 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2971 if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2973 if (vlan->nb_guest_devs == 0)
2974 fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2975 if (vlan->nb_host_devs == 0)
2977 "Warning: vlan %d is not connected to host network\n",