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
26 #include "config-host.h"
29 #include "net/socket.h"
31 #include "net/slirp.h"
36 #include "qemu-common.h"
37 #include "qemu_socket.h"
38 #include "qmp-commands.h"
41 #include "qapi-visit.h"
42 #include "qapi/opts-visitor.h"
43 #include "qapi/qapi-dealloc-visitor.h"
45 /* Net bridge is currently not supported for W32. */
47 # define CONFIG_NET_BRIDGE
50 static QTAILQ_HEAD(, VLANState) vlans;
51 static QTAILQ_HEAD(, VLANClientState) non_vlan_clients;
55 /***********************************************************/
56 /* network device redirectors */
58 #if defined(DEBUG_NET)
59 static void hex_dump(FILE *f, const uint8_t *buf, int size)
63 for(i=0;i<size;i+=16) {
67 fprintf(f, "%08x ", i);
70 fprintf(f, " %02x", buf[i+j]);
77 if (c < ' ' || c > '~')
86 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
97 if (len > buf_size - 1)
106 int parse_host_port(struct sockaddr_in *saddr, const char *str)
114 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
116 saddr->sin_family = AF_INET;
117 if (buf[0] == '\0') {
118 saddr->sin_addr.s_addr = 0;
120 if (qemu_isdigit(buf[0])) {
121 if (!inet_aton(buf, &saddr->sin_addr))
124 if ((he = gethostbyname(buf)) == NULL)
126 saddr->sin_addr = *(struct in_addr *)he->h_addr;
129 port = strtol(p, (char **)&r, 0);
132 saddr->sin_port = htons(port);
136 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
138 snprintf(vc->info_str, sizeof(vc->info_str),
139 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
141 macaddr[0], macaddr[1], macaddr[2],
142 macaddr[3], macaddr[4], macaddr[5]);
145 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
147 static int index = 0;
148 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
150 if (memcmp(macaddr, &zero, sizeof(zero)) != 0)
152 macaddr->a[0] = 0x52;
153 macaddr->a[1] = 0x54;
154 macaddr->a[2] = 0x00;
155 macaddr->a[3] = 0x12;
156 macaddr->a[4] = 0x34;
157 macaddr->a[5] = 0x56 + index++;
160 static char *assign_name(VLANClientState *vc1, const char *model)
167 QTAILQ_FOREACH(vlan, &vlans, next) {
168 QTAILQ_FOREACH(vc, &vlan->clients, next) {
169 if (vc != vc1 && strcmp(vc->model, model) == 0) {
175 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
176 if (vc != vc1 && strcmp(vc->model, model) == 0) {
181 snprintf(buf, sizeof(buf), "%s.%d", model, id);
183 return g_strdup(buf);
186 static ssize_t qemu_deliver_packet(VLANClientState *sender,
191 static ssize_t qemu_deliver_packet_iov(VLANClientState *sender,
193 const struct iovec *iov,
197 VLANClientState *qemu_new_net_client(NetClientInfo *info,
199 VLANClientState *peer,
205 assert(info->size >= sizeof(VLANClientState));
207 vc = g_malloc0(info->size);
210 vc->model = g_strdup(model);
212 vc->name = g_strdup(name);
214 vc->name = assign_name(vc, model);
220 QTAILQ_INSERT_TAIL(&vc->vlan->clients, vc, next);
227 QTAILQ_INSERT_TAIL(&non_vlan_clients, vc, next);
229 vc->send_queue = qemu_new_net_queue(qemu_deliver_packet,
230 qemu_deliver_packet_iov,
237 NICState *qemu_new_nic(NetClientInfo *info,
246 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
247 assert(info->size >= sizeof(NICState));
249 nc = qemu_new_net_client(info, conf->vlan, conf->peer, model, name);
251 nic = DO_UPCAST(NICState, nc, nc);
253 nic->opaque = opaque;
258 static void qemu_cleanup_vlan_client(VLANClientState *vc)
261 QTAILQ_REMOVE(&vc->vlan->clients, vc, next);
263 QTAILQ_REMOVE(&non_vlan_clients, vc, next);
266 if (vc->info->cleanup) {
267 vc->info->cleanup(vc);
271 static void qemu_free_vlan_client(VLANClientState *vc)
274 if (vc->send_queue) {
275 qemu_del_net_queue(vc->send_queue);
278 vc->peer->peer = NULL;
286 void qemu_del_vlan_client(VLANClientState *vc)
288 /* If there is a peer NIC, delete and cleanup client, but do not free. */
289 if (!vc->vlan && vc->peer && vc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
290 NICState *nic = DO_UPCAST(NICState, nc, vc->peer);
291 if (nic->peer_deleted) {
294 nic->peer_deleted = true;
295 /* Let NIC know peer is gone. */
296 vc->peer->link_down = true;
297 if (vc->peer->info->link_status_changed) {
298 vc->peer->info->link_status_changed(vc->peer);
300 qemu_cleanup_vlan_client(vc);
304 /* If this is a peer NIC and peer has already been deleted, free it now. */
305 if (!vc->vlan && vc->peer && vc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
306 NICState *nic = DO_UPCAST(NICState, nc, vc);
307 if (nic->peer_deleted) {
308 qemu_free_vlan_client(vc->peer);
312 qemu_cleanup_vlan_client(vc);
313 qemu_free_vlan_client(vc);
317 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
318 const char *client_str)
323 vlan = qemu_find_vlan(vlan_id, 0);
325 monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
329 QTAILQ_FOREACH(vc, &vlan->clients, next) {
330 if (!strcmp(vc->name, client_str)) {
335 monitor_printf(mon, "can't find device %s on VLAN %d\n",
336 client_str, vlan_id);
342 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
347 QTAILQ_FOREACH(nc, &non_vlan_clients, next) {
348 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
349 func(DO_UPCAST(NICState, nc, nc), opaque);
353 QTAILQ_FOREACH(vlan, &vlans, next) {
354 QTAILQ_FOREACH(nc, &vlan->clients, next) {
355 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
356 func(DO_UPCAST(NICState, nc, nc), opaque);
362 int qemu_can_send_packet(VLANClientState *sender)
364 VLANState *vlan = sender->vlan;
368 if (sender->peer->receive_disabled) {
370 } else if (sender->peer->info->can_receive &&
371 !sender->peer->info->can_receive(sender->peer)) {
382 QTAILQ_FOREACH(vc, &vlan->clients, next) {
387 /* no can_receive() handler, they can always receive */
388 if (vc->info->can_receive && !vc->info->can_receive(vc)) {
395 static ssize_t qemu_deliver_packet(VLANClientState *sender,
401 VLANClientState *vc = opaque;
408 if (vc->receive_disabled) {
412 if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->info->receive_raw) {
413 ret = vc->info->receive_raw(vc, data, size);
415 ret = vc->info->receive(vc, data, size);
419 vc->receive_disabled = 1;
425 static ssize_t qemu_vlan_deliver_packet(VLANClientState *sender,
431 VLANState *vlan = opaque;
435 QTAILQ_FOREACH(vc, &vlan->clients, next) {
447 if (vc->receive_disabled) {
452 if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->info->receive_raw) {
453 len = vc->info->receive_raw(vc, buf, size);
455 len = vc->info->receive(vc, buf, size);
459 vc->receive_disabled = 1;
462 ret = (ret >= 0) ? ret : len;
469 void qemu_purge_queued_packets(VLANClientState *vc)
473 if (!vc->peer && !vc->vlan) {
478 queue = vc->peer->send_queue;
480 queue = vc->vlan->send_queue;
483 qemu_net_queue_purge(queue, vc);
486 void qemu_flush_queued_packets(VLANClientState *vc)
490 vc->receive_disabled = 0;
493 queue = vc->vlan->send_queue;
495 queue = vc->send_queue;
498 qemu_net_queue_flush(queue);
501 static ssize_t qemu_send_packet_async_with_flags(VLANClientState *sender,
503 const uint8_t *buf, int size,
504 NetPacketSent *sent_cb)
509 printf("qemu_send_packet_async:\n");
510 hex_dump(stdout, buf, size);
513 if (sender->link_down || (!sender->peer && !sender->vlan)) {
518 queue = sender->peer->send_queue;
520 queue = sender->vlan->send_queue;
523 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
526 ssize_t qemu_send_packet_async(VLANClientState *sender,
527 const uint8_t *buf, int size,
528 NetPacketSent *sent_cb)
530 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
534 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
536 qemu_send_packet_async(vc, buf, size, NULL);
539 ssize_t qemu_send_packet_raw(VLANClientState *vc, const uint8_t *buf, int size)
541 return qemu_send_packet_async_with_flags(vc, QEMU_NET_PACKET_FLAG_RAW,
545 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
548 uint8_t buffer[4096];
551 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
553 return vc->info->receive(vc, buffer, offset);
556 static ssize_t qemu_deliver_packet_iov(VLANClientState *sender,
558 const struct iovec *iov,
562 VLANClientState *vc = opaque;
565 return iov_size(iov, iovcnt);
568 if (vc->info->receive_iov) {
569 return vc->info->receive_iov(vc, iov, iovcnt);
571 return vc_sendv_compat(vc, iov, iovcnt);
575 static ssize_t qemu_vlan_deliver_packet_iov(VLANClientState *sender,
577 const struct iovec *iov,
581 VLANState *vlan = opaque;
585 QTAILQ_FOREACH(vc, &vlan->clients, next) {
593 ret = iov_size(iov, iovcnt);
597 assert(!(flags & QEMU_NET_PACKET_FLAG_RAW));
599 if (vc->info->receive_iov) {
600 len = vc->info->receive_iov(vc, iov, iovcnt);
602 len = vc_sendv_compat(vc, iov, iovcnt);
605 ret = (ret >= 0) ? ret : len;
611 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
612 const struct iovec *iov, int iovcnt,
613 NetPacketSent *sent_cb)
617 if (sender->link_down || (!sender->peer && !sender->vlan)) {
618 return iov_size(iov, iovcnt);
622 queue = sender->peer->send_queue;
624 queue = sender->vlan->send_queue;
627 return qemu_net_queue_send_iov(queue, sender,
628 QEMU_NET_PACKET_FLAG_NONE,
629 iov, iovcnt, sent_cb);
633 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
635 return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
638 /* find or alloc a new VLAN */
639 VLANState *qemu_find_vlan(int id, int allocate)
643 QTAILQ_FOREACH(vlan, &vlans, next) {
644 if (vlan->id == id) {
653 vlan = g_malloc0(sizeof(VLANState));
655 QTAILQ_INIT(&vlan->clients);
657 vlan->send_queue = qemu_new_net_queue(qemu_vlan_deliver_packet,
658 qemu_vlan_deliver_packet_iov,
661 QTAILQ_INSERT_TAIL(&vlans, vlan, next);
666 VLANClientState *qemu_find_netdev(const char *id)
670 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
671 if (vc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
673 if (!strcmp(vc->name, id)) {
681 static int nic_get_free_idx(void)
685 for (index = 0; index < MAX_NICS; index++)
686 if (!nd_table[index].used)
691 int qemu_show_nic_models(const char *arg, const char *const *models)
695 if (!arg || strcmp(arg, "?"))
698 fprintf(stderr, "qemu: Supported NIC models: ");
699 for (i = 0 ; models[i]; i++)
700 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
704 void qemu_check_nic_model(NICInfo *nd, const char *model)
706 const char *models[2];
711 if (qemu_show_nic_models(nd->model, models))
713 if (qemu_find_nic_model(nd, models, model) < 0)
717 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
718 const char *default_model)
723 nd->model = g_strdup(default_model);
725 for (i = 0 ; models[i]; i++) {
726 if (strcmp(nd->model, models[i]) == 0)
730 error_report("Unsupported NIC model: %s", nd->model);
734 int net_handle_fd_param(Monitor *mon, const char *param)
738 if (!qemu_isdigit(param[0]) && mon) {
740 fd = monitor_get_fd(mon, param);
742 error_report("No file descriptor named %s found", param);
746 fd = qemu_parse_fd(param);
752 static int net_init_nic(const NetClientOptions *opts, const char *name,
757 const NetLegacyNicOptions *nic;
759 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
762 idx = nic_get_free_idx();
763 if (idx == -1 || nb_nics >= MAX_NICS) {
764 error_report("Too Many NICs");
770 memset(nd, 0, sizeof(*nd));
772 if (nic->has_netdev) {
773 nd->netdev = qemu_find_netdev(nic->netdev);
775 error_report("netdev '%s' not found", nic->netdev);
783 nd->name = g_strdup(name);
785 if (nic->has_model) {
786 nd->model = g_strdup(nic->model);
789 nd->devaddr = g_strdup(nic->addr);
792 if (nic->has_macaddr &&
793 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
794 error_report("invalid syntax for ethernet address");
797 qemu_macaddr_default_if_unset(&nd->macaddr);
799 if (nic->has_vectors) {
800 if (nic->vectors > 0x7ffffff) {
801 error_report("invalid # of vectors: %"PRIu32, nic->vectors);
804 nd->nvectors = nic->vectors;
806 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
816 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
817 const NetClientOptions *opts,
820 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
822 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
824 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
825 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
827 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
829 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
830 #ifdef CONFIG_NET_BRIDGE
831 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
833 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
837 static int net_client_init1(const void *object, int is_netdev, Error **errp)
840 const Netdev *netdev;
841 const NetLegacy *net;
843 const NetClientOptions *opts;
848 opts = u.netdev->opts;
851 switch (opts->kind) {
853 case NET_CLIENT_OPTIONS_KIND_USER:
855 case NET_CLIENT_OPTIONS_KIND_TAP:
856 case NET_CLIENT_OPTIONS_KIND_SOCKET:
858 case NET_CLIENT_OPTIONS_KIND_VDE:
860 #ifdef CONFIG_NET_BRIDGE
861 case NET_CLIENT_OPTIONS_KIND_BRIDGE:
863 case NET_CLIENT_OPTIONS_KIND_HUBPORT:
867 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
868 "a netdev backend type");
874 /* missing optional values have been initialized to "all bits zero" */
875 name = u.net->has_id ? u.net->id : u.net->name;
878 if (net_client_init_fun[opts->kind]) {
879 VLANState *vlan = NULL;
881 /* Do not add to a vlan if it's a -netdev or a nic with a netdev=
884 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
885 !opts->nic->has_netdev)) {
886 vlan = qemu_find_vlan(u.net->has_vlan ? u.net->vlan : 0, true);
889 if (net_client_init_fun[opts->kind](opts, name, vlan) < 0) {
890 /* TODO push error reporting into init() methods */
891 error_set(errp, QERR_DEVICE_INIT_FAILED,
892 NetClientOptionsKind_lookup[opts->kind]);
900 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
903 visit_type_Netdev(v, (Netdev **)object, NULL, errp);
905 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
910 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
917 OptsVisitor *ov = opts_visitor_new(opts);
919 net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
920 opts_visitor_cleanup(ov);
924 ret = net_client_init1(object, is_netdev, &err);
928 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
930 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
931 qapi_dealloc_visitor_cleanup(dv);
934 error_propagate(errp, err);
939 static int net_host_check_device(const char *device)
942 const char *valid_param_list[] = { "tap", "socket", "dump"
943 #ifdef CONFIG_NET_BRIDGE
953 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
954 if (!strncmp(valid_param_list[i], device,
955 strlen(valid_param_list[i])))
962 void net_host_device_add(Monitor *mon, const QDict *qdict)
964 const char *device = qdict_get_str(qdict, "device");
965 const char *opts_str = qdict_get_try_str(qdict, "opts");
966 Error *local_err = NULL;
969 if (!net_host_check_device(device)) {
970 monitor_printf(mon, "invalid host network device %s\n", device);
974 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
979 qemu_opt_set(opts, "type", device);
981 net_client_init(opts, 0, &local_err);
982 if (error_is_set(&local_err)) {
983 qerror_report_err(local_err);
984 error_free(local_err);
985 monitor_printf(mon, "adding host network device %s failed\n", device);
989 void net_host_device_remove(Monitor *mon, const QDict *qdict)
992 int vlan_id = qdict_get_int(qdict, "vlan_id");
993 const char *device = qdict_get_str(qdict, "device");
995 vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
999 if (!net_host_check_device(vc->model)) {
1000 monitor_printf(mon, "invalid host network device %s\n", device);
1003 qemu_del_vlan_client(vc);
1006 void netdev_add(QemuOpts *opts, Error **errp)
1008 net_client_init(opts, 1, errp);
1011 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret)
1013 Error *local_err = NULL;
1014 QemuOptsList *opts_list;
1017 opts_list = qemu_find_opts_err("netdev", &local_err);
1018 if (error_is_set(&local_err)) {
1022 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
1023 if (error_is_set(&local_err)) {
1027 netdev_add(opts, &local_err);
1028 if (error_is_set(&local_err)) {
1029 qemu_opts_del(opts);
1036 qerror_report_err(local_err);
1037 error_free(local_err);
1041 void qmp_netdev_del(const char *id, Error **errp)
1043 VLANClientState *vc;
1045 vc = qemu_find_netdev(id);
1047 error_set(errp, QERR_DEVICE_NOT_FOUND, id);
1051 qemu_del_vlan_client(vc);
1052 qemu_opts_del(qemu_opts_find(qemu_find_opts_err("netdev", errp), id));
1055 static void print_net_client(Monitor *mon, VLANClientState *vc)
1057 monitor_printf(mon, "%s: type=%s,%s\n", vc->name,
1058 NetClientOptionsKind_lookup[vc->info->type], vc->info_str);
1061 void do_info_network(Monitor *mon)
1064 VLANClientState *vc, *peer;
1065 NetClientOptionsKind type;
1067 QTAILQ_FOREACH(vlan, &vlans, next) {
1068 monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
1070 QTAILQ_FOREACH(vc, &vlan->clients, next) {
1071 monitor_printf(mon, " ");
1072 print_net_client(mon, vc);
1075 monitor_printf(mon, "Devices not on any VLAN:\n");
1076 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
1078 type = vc->info->type;
1079 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
1080 monitor_printf(mon, " ");
1081 print_net_client(mon, vc);
1082 } /* else it's a netdev connected to a NIC, printed with the NIC */
1083 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
1084 monitor_printf(mon, " \\ ");
1085 print_net_client(mon, peer);
1090 void qmp_set_link(const char *name, bool up, Error **errp)
1093 VLANClientState *vc = NULL;
1095 QTAILQ_FOREACH(vlan, &vlans, next) {
1096 QTAILQ_FOREACH(vc, &vlan->clients, next) {
1097 if (strcmp(vc->name, name) == 0) {
1102 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
1103 if (!strcmp(vc->name, name)) {
1110 error_set(errp, QERR_DEVICE_NOT_FOUND, name);
1114 vc->link_down = !up;
1116 if (vc->info->link_status_changed) {
1117 vc->info->link_status_changed(vc);
1120 /* Notify peer. Don't update peer link status: this makes it possible to
1121 * disconnect from host network without notifying the guest.
1122 * FIXME: is disconnected link status change operation useful?
1124 * Current behaviour is compatible with qemu vlans where there could be
1125 * multiple clients that can still communicate with each other in
1126 * disconnected mode. For now maintain this compatibility. */
1127 if (vc->peer && vc->peer->info->link_status_changed) {
1128 vc->peer->info->link_status_changed(vc->peer);
1132 void net_cleanup(void)
1135 VLANClientState *vc, *next_vc;
1137 QTAILQ_FOREACH(vlan, &vlans, next) {
1138 QTAILQ_FOREACH_SAFE(vc, &vlan->clients, next, next_vc) {
1139 qemu_del_vlan_client(vc);
1143 QTAILQ_FOREACH_SAFE(vc, &non_vlan_clients, next, next_vc) {
1144 qemu_del_vlan_client(vc);
1148 void net_check_clients(void)
1151 VLANClientState *vc;
1154 /* Don't warn about the default network setup that you get if
1155 * no command line -net or -netdev options are specified. There
1156 * are two cases that we would otherwise complain about:
1157 * (1) board doesn't support a NIC but the implicit "-net nic"
1159 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
1160 * sets up a nic that isn't connected to anything.
1166 QTAILQ_FOREACH(vlan, &vlans, next) {
1167 int has_nic = 0, has_host_dev = 0;
1169 QTAILQ_FOREACH(vc, &vlan->clients, next) {
1170 switch (vc->info->type) {
1171 case NET_CLIENT_OPTIONS_KIND_NIC:
1174 case NET_CLIENT_OPTIONS_KIND_USER:
1175 case NET_CLIENT_OPTIONS_KIND_TAP:
1176 case NET_CLIENT_OPTIONS_KIND_SOCKET:
1177 case NET_CLIENT_OPTIONS_KIND_VDE:
1183 if (has_host_dev && !has_nic)
1184 fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1185 if (has_nic && !has_host_dev)
1187 "Warning: vlan %d is not connected to host network\n",
1190 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
1192 fprintf(stderr, "Warning: %s %s has no peer\n",
1193 vc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? "nic" : "netdev",
1198 /* Check that all NICs requested via -net nic actually got created.
1199 * NICs created via -device don't need to be checked here because
1200 * they are always instantiated.
1202 for (i = 0; i < MAX_NICS; i++) {
1203 NICInfo *nd = &nd_table[i];
1204 if (nd->used && !nd->instantiated) {
1205 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1206 "was not created (not supported by this machine?)\n",
1207 nd->name ? nd->name : "anonymous",
1208 nd->model ? nd->model : "unspecified");
1213 static int net_init_client(QemuOpts *opts, void *dummy)
1215 Error *local_err = NULL;
1217 net_client_init(opts, 0, &local_err);
1218 if (error_is_set(&local_err)) {
1219 qerror_report_err(local_err);
1220 error_free(local_err);
1227 static int net_init_netdev(QemuOpts *opts, void *dummy)
1229 Error *local_err = NULL;
1232 ret = net_client_init(opts, 1, &local_err);
1233 if (error_is_set(&local_err)) {
1234 qerror_report_err(local_err);
1235 error_free(local_err);
1242 int net_init_clients(void)
1244 QemuOptsList *net = qemu_find_opts("net");
1247 /* if no clients, we use a default config */
1248 qemu_opts_set(net, NULL, "type", "nic");
1250 qemu_opts_set(net, NULL, "type", "user");
1254 QTAILQ_INIT(&vlans);
1255 QTAILQ_INIT(&non_vlan_clients);
1257 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1)
1260 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) {
1267 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1269 #if defined(CONFIG_SLIRP)
1271 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1276 if (!qemu_opts_parse(opts_list, optarg, 1)) {
1286 unsigned compute_mcast_idx(const uint8_t *ep)
1293 for (i = 0; i < 6; i++) {
1295 for (j = 0; j < 8; j++) {
1296 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1300 crc = ((crc ^ POLYNOMIAL) | carry);