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"
35 #include "qemu-common.h"
36 #include "qemu_socket.h"
37 #include "qmp-commands.h"
40 #include "qapi-visit.h"
41 #include "qapi/opts-visitor.h"
42 #include "qapi/qapi-dealloc-visitor.h"
44 /* Net bridge is currently not supported for W32. */
46 # define CONFIG_NET_BRIDGE
49 static QTAILQ_HEAD(, VLANState) vlans;
50 static QTAILQ_HEAD(, VLANClientState) non_vlan_clients;
54 /***********************************************************/
55 /* network device redirectors */
57 #if defined(DEBUG_NET)
58 static void hex_dump(FILE *f, const uint8_t *buf, int size)
62 for(i=0;i<size;i+=16) {
66 fprintf(f, "%08x ", i);
69 fprintf(f, " %02x", buf[i+j]);
76 if (c < ' ' || c > '~')
85 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
96 if (len > buf_size - 1)
105 int parse_host_port(struct sockaddr_in *saddr, const char *str)
113 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
115 saddr->sin_family = AF_INET;
116 if (buf[0] == '\0') {
117 saddr->sin_addr.s_addr = 0;
119 if (qemu_isdigit(buf[0])) {
120 if (!inet_aton(buf, &saddr->sin_addr))
123 if ((he = gethostbyname(buf)) == NULL)
125 saddr->sin_addr = *(struct in_addr *)he->h_addr;
128 port = strtol(p, (char **)&r, 0);
131 saddr->sin_port = htons(port);
135 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
137 snprintf(vc->info_str, sizeof(vc->info_str),
138 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
140 macaddr[0], macaddr[1], macaddr[2],
141 macaddr[3], macaddr[4], macaddr[5]);
144 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
146 static int index = 0;
147 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
149 if (memcmp(macaddr, &zero, sizeof(zero)) != 0)
151 macaddr->a[0] = 0x52;
152 macaddr->a[1] = 0x54;
153 macaddr->a[2] = 0x00;
154 macaddr->a[3] = 0x12;
155 macaddr->a[4] = 0x34;
156 macaddr->a[5] = 0x56 + index++;
159 static char *assign_name(VLANClientState *vc1, const char *model)
166 QTAILQ_FOREACH(vlan, &vlans, next) {
167 QTAILQ_FOREACH(vc, &vlan->clients, next) {
168 if (vc != vc1 && strcmp(vc->model, model) == 0) {
174 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
175 if (vc != vc1 && strcmp(vc->model, model) == 0) {
180 snprintf(buf, sizeof(buf), "%s.%d", model, id);
182 return g_strdup(buf);
185 static ssize_t qemu_deliver_packet(VLANClientState *sender,
190 static ssize_t qemu_deliver_packet_iov(VLANClientState *sender,
192 const struct iovec *iov,
196 VLANClientState *qemu_new_net_client(NetClientInfo *info,
198 VLANClientState *peer,
204 assert(info->size >= sizeof(VLANClientState));
206 vc = g_malloc0(info->size);
209 vc->model = g_strdup(model);
211 vc->name = g_strdup(name);
213 vc->name = assign_name(vc, model);
219 QTAILQ_INSERT_TAIL(&vc->vlan->clients, vc, next);
226 QTAILQ_INSERT_TAIL(&non_vlan_clients, vc, next);
228 vc->send_queue = qemu_new_net_queue(qemu_deliver_packet,
229 qemu_deliver_packet_iov,
236 NICState *qemu_new_nic(NetClientInfo *info,
245 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
246 assert(info->size >= sizeof(NICState));
248 nc = qemu_new_net_client(info, conf->vlan, conf->peer, model, name);
250 nic = DO_UPCAST(NICState, nc, nc);
252 nic->opaque = opaque;
257 static void qemu_cleanup_vlan_client(VLANClientState *vc)
260 QTAILQ_REMOVE(&vc->vlan->clients, vc, next);
262 QTAILQ_REMOVE(&non_vlan_clients, vc, next);
265 if (vc->info->cleanup) {
266 vc->info->cleanup(vc);
270 static void qemu_free_vlan_client(VLANClientState *vc)
273 if (vc->send_queue) {
274 qemu_del_net_queue(vc->send_queue);
277 vc->peer->peer = NULL;
285 void qemu_del_vlan_client(VLANClientState *vc)
287 /* If there is a peer NIC, delete and cleanup client, but do not free. */
288 if (!vc->vlan && vc->peer && vc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
289 NICState *nic = DO_UPCAST(NICState, nc, vc->peer);
290 if (nic->peer_deleted) {
293 nic->peer_deleted = true;
294 /* Let NIC know peer is gone. */
295 vc->peer->link_down = true;
296 if (vc->peer->info->link_status_changed) {
297 vc->peer->info->link_status_changed(vc->peer);
299 qemu_cleanup_vlan_client(vc);
303 /* If this is a peer NIC and peer has already been deleted, free it now. */
304 if (!vc->vlan && vc->peer && vc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
305 NICState *nic = DO_UPCAST(NICState, nc, vc);
306 if (nic->peer_deleted) {
307 qemu_free_vlan_client(vc->peer);
311 qemu_cleanup_vlan_client(vc);
312 qemu_free_vlan_client(vc);
316 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
317 const char *client_str)
322 vlan = qemu_find_vlan(vlan_id, 0);
324 monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
328 QTAILQ_FOREACH(vc, &vlan->clients, next) {
329 if (!strcmp(vc->name, client_str)) {
334 monitor_printf(mon, "can't find device %s on VLAN %d\n",
335 client_str, vlan_id);
341 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
346 QTAILQ_FOREACH(nc, &non_vlan_clients, next) {
347 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
348 func(DO_UPCAST(NICState, nc, nc), opaque);
352 QTAILQ_FOREACH(vlan, &vlans, next) {
353 QTAILQ_FOREACH(nc, &vlan->clients, next) {
354 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
355 func(DO_UPCAST(NICState, nc, nc), opaque);
361 int qemu_can_send_packet(VLANClientState *sender)
363 VLANState *vlan = sender->vlan;
367 if (sender->peer->receive_disabled) {
369 } else if (sender->peer->info->can_receive &&
370 !sender->peer->info->can_receive(sender->peer)) {
381 QTAILQ_FOREACH(vc, &vlan->clients, next) {
386 /* no can_receive() handler, they can always receive */
387 if (vc->info->can_receive && !vc->info->can_receive(vc)) {
394 static ssize_t qemu_deliver_packet(VLANClientState *sender,
400 VLANClientState *vc = opaque;
407 if (vc->receive_disabled) {
411 if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->info->receive_raw) {
412 ret = vc->info->receive_raw(vc, data, size);
414 ret = vc->info->receive(vc, data, size);
418 vc->receive_disabled = 1;
424 static ssize_t qemu_vlan_deliver_packet(VLANClientState *sender,
430 VLANState *vlan = opaque;
434 QTAILQ_FOREACH(vc, &vlan->clients, next) {
446 if (vc->receive_disabled) {
451 if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->info->receive_raw) {
452 len = vc->info->receive_raw(vc, buf, size);
454 len = vc->info->receive(vc, buf, size);
458 vc->receive_disabled = 1;
461 ret = (ret >= 0) ? ret : len;
468 void qemu_purge_queued_packets(VLANClientState *vc)
472 if (!vc->peer && !vc->vlan) {
477 queue = vc->peer->send_queue;
479 queue = vc->vlan->send_queue;
482 qemu_net_queue_purge(queue, vc);
485 void qemu_flush_queued_packets(VLANClientState *vc)
489 vc->receive_disabled = 0;
492 queue = vc->vlan->send_queue;
494 queue = vc->send_queue;
497 qemu_net_queue_flush(queue);
500 static ssize_t qemu_send_packet_async_with_flags(VLANClientState *sender,
502 const uint8_t *buf, int size,
503 NetPacketSent *sent_cb)
508 printf("qemu_send_packet_async:\n");
509 hex_dump(stdout, buf, size);
512 if (sender->link_down || (!sender->peer && !sender->vlan)) {
517 queue = sender->peer->send_queue;
519 queue = sender->vlan->send_queue;
522 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
525 ssize_t qemu_send_packet_async(VLANClientState *sender,
526 const uint8_t *buf, int size,
527 NetPacketSent *sent_cb)
529 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
533 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
535 qemu_send_packet_async(vc, buf, size, NULL);
538 ssize_t qemu_send_packet_raw(VLANClientState *vc, const uint8_t *buf, int size)
540 return qemu_send_packet_async_with_flags(vc, QEMU_NET_PACKET_FLAG_RAW,
544 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
547 uint8_t buffer[4096];
550 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
552 return vc->info->receive(vc, buffer, offset);
555 static ssize_t qemu_deliver_packet_iov(VLANClientState *sender,
557 const struct iovec *iov,
561 VLANClientState *vc = opaque;
564 return iov_size(iov, iovcnt);
567 if (vc->info->receive_iov) {
568 return vc->info->receive_iov(vc, iov, iovcnt);
570 return vc_sendv_compat(vc, iov, iovcnt);
574 static ssize_t qemu_vlan_deliver_packet_iov(VLANClientState *sender,
576 const struct iovec *iov,
580 VLANState *vlan = opaque;
584 QTAILQ_FOREACH(vc, &vlan->clients, next) {
592 ret = iov_size(iov, iovcnt);
596 assert(!(flags & QEMU_NET_PACKET_FLAG_RAW));
598 if (vc->info->receive_iov) {
599 len = vc->info->receive_iov(vc, iov, iovcnt);
601 len = vc_sendv_compat(vc, iov, iovcnt);
604 ret = (ret >= 0) ? ret : len;
610 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
611 const struct iovec *iov, int iovcnt,
612 NetPacketSent *sent_cb)
616 if (sender->link_down || (!sender->peer && !sender->vlan)) {
617 return iov_size(iov, iovcnt);
621 queue = sender->peer->send_queue;
623 queue = sender->vlan->send_queue;
626 return qemu_net_queue_send_iov(queue, sender,
627 QEMU_NET_PACKET_FLAG_NONE,
628 iov, iovcnt, sent_cb);
632 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
634 return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
637 /* find or alloc a new VLAN */
638 VLANState *qemu_find_vlan(int id, int allocate)
642 QTAILQ_FOREACH(vlan, &vlans, next) {
643 if (vlan->id == id) {
652 vlan = g_malloc0(sizeof(VLANState));
654 QTAILQ_INIT(&vlan->clients);
656 vlan->send_queue = qemu_new_net_queue(qemu_vlan_deliver_packet,
657 qemu_vlan_deliver_packet_iov,
660 QTAILQ_INSERT_TAIL(&vlans, vlan, next);
665 VLANClientState *qemu_find_netdev(const char *id)
669 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
670 if (vc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
672 if (!strcmp(vc->name, id)) {
680 static int nic_get_free_idx(void)
684 for (index = 0; index < MAX_NICS; index++)
685 if (!nd_table[index].used)
690 int qemu_show_nic_models(const char *arg, const char *const *models)
694 if (!arg || !is_help_option(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,
836 static int net_client_init1(const void *object, int is_netdev, Error **errp)
839 const Netdev *netdev;
840 const NetLegacy *net;
842 const NetClientOptions *opts;
847 opts = u.netdev->opts;
850 switch (opts->kind) {
852 case NET_CLIENT_OPTIONS_KIND_USER:
854 case NET_CLIENT_OPTIONS_KIND_TAP:
855 case NET_CLIENT_OPTIONS_KIND_SOCKET:
857 case NET_CLIENT_OPTIONS_KIND_VDE:
859 #ifdef CONFIG_NET_BRIDGE
860 case NET_CLIENT_OPTIONS_KIND_BRIDGE:
865 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
866 "a netdev backend type");
872 /* missing optional values have been initialized to "all bits zero" */
873 name = u.net->has_id ? u.net->id : u.net->name;
876 if (net_client_init_fun[opts->kind]) {
877 VLANState *vlan = NULL;
879 /* Do not add to a vlan if it's a -netdev or a nic with a netdev=
882 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
883 !opts->nic->has_netdev)) {
884 vlan = qemu_find_vlan(u.net->has_vlan ? u.net->vlan : 0, true);
887 if (net_client_init_fun[opts->kind](opts, name, vlan) < 0) {
888 /* TODO push error reporting into init() methods */
889 error_set(errp, QERR_DEVICE_INIT_FAILED,
890 NetClientOptionsKind_lookup[opts->kind]);
898 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
901 visit_type_Netdev(v, (Netdev **)object, NULL, errp);
903 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
908 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
915 OptsVisitor *ov = opts_visitor_new(opts);
917 net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
918 opts_visitor_cleanup(ov);
922 ret = net_client_init1(object, is_netdev, &err);
926 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
928 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
929 qapi_dealloc_visitor_cleanup(dv);
932 error_propagate(errp, err);
937 static int net_host_check_device(const char *device)
940 const char *valid_param_list[] = { "tap", "socket", "dump"
941 #ifdef CONFIG_NET_BRIDGE
951 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
952 if (!strncmp(valid_param_list[i], device,
953 strlen(valid_param_list[i])))
960 void net_host_device_add(Monitor *mon, const QDict *qdict)
962 const char *device = qdict_get_str(qdict, "device");
963 const char *opts_str = qdict_get_try_str(qdict, "opts");
964 Error *local_err = NULL;
967 if (!net_host_check_device(device)) {
968 monitor_printf(mon, "invalid host network device %s\n", device);
972 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
977 qemu_opt_set(opts, "type", device);
979 net_client_init(opts, 0, &local_err);
980 if (error_is_set(&local_err)) {
981 qerror_report_err(local_err);
982 error_free(local_err);
983 monitor_printf(mon, "adding host network device %s failed\n", device);
987 void net_host_device_remove(Monitor *mon, const QDict *qdict)
990 int vlan_id = qdict_get_int(qdict, "vlan_id");
991 const char *device = qdict_get_str(qdict, "device");
993 vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
997 if (!net_host_check_device(vc->model)) {
998 monitor_printf(mon, "invalid host network device %s\n", device);
1001 qemu_del_vlan_client(vc);
1004 void netdev_add(QemuOpts *opts, Error **errp)
1006 net_client_init(opts, 1, errp);
1009 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret)
1011 Error *local_err = NULL;
1012 QemuOptsList *opts_list;
1015 opts_list = qemu_find_opts_err("netdev", &local_err);
1016 if (error_is_set(&local_err)) {
1020 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
1021 if (error_is_set(&local_err)) {
1025 netdev_add(opts, &local_err);
1026 if (error_is_set(&local_err)) {
1027 qemu_opts_del(opts);
1034 qerror_report_err(local_err);
1035 error_free(local_err);
1039 void qmp_netdev_del(const char *id, Error **errp)
1041 VLANClientState *vc;
1043 vc = qemu_find_netdev(id);
1045 error_set(errp, QERR_DEVICE_NOT_FOUND, id);
1049 qemu_del_vlan_client(vc);
1050 qemu_opts_del(qemu_opts_find(qemu_find_opts_err("netdev", errp), id));
1053 static void print_net_client(Monitor *mon, VLANClientState *vc)
1055 monitor_printf(mon, "%s: type=%s,%s\n", vc->name,
1056 NetClientOptionsKind_lookup[vc->info->type], vc->info_str);
1059 void do_info_network(Monitor *mon)
1062 VLANClientState *vc, *peer;
1063 NetClientOptionsKind type;
1065 QTAILQ_FOREACH(vlan, &vlans, next) {
1066 monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
1068 QTAILQ_FOREACH(vc, &vlan->clients, next) {
1069 monitor_printf(mon, " ");
1070 print_net_client(mon, vc);
1073 monitor_printf(mon, "Devices not on any VLAN:\n");
1074 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
1076 type = vc->info->type;
1077 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
1078 monitor_printf(mon, " ");
1079 print_net_client(mon, vc);
1080 } /* else it's a netdev connected to a NIC, printed with the NIC */
1081 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
1082 monitor_printf(mon, " \\ ");
1083 print_net_client(mon, peer);
1088 void qmp_set_link(const char *name, bool up, Error **errp)
1091 VLANClientState *vc = NULL;
1093 QTAILQ_FOREACH(vlan, &vlans, next) {
1094 QTAILQ_FOREACH(vc, &vlan->clients, next) {
1095 if (strcmp(vc->name, name) == 0) {
1100 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
1101 if (!strcmp(vc->name, name)) {
1108 error_set(errp, QERR_DEVICE_NOT_FOUND, name);
1112 vc->link_down = !up;
1114 if (vc->info->link_status_changed) {
1115 vc->info->link_status_changed(vc);
1118 /* Notify peer. Don't update peer link status: this makes it possible to
1119 * disconnect from host network without notifying the guest.
1120 * FIXME: is disconnected link status change operation useful?
1122 * Current behaviour is compatible with qemu vlans where there could be
1123 * multiple clients that can still communicate with each other in
1124 * disconnected mode. For now maintain this compatibility. */
1125 if (vc->peer && vc->peer->info->link_status_changed) {
1126 vc->peer->info->link_status_changed(vc->peer);
1130 void net_cleanup(void)
1133 VLANClientState *vc, *next_vc;
1135 QTAILQ_FOREACH(vlan, &vlans, next) {
1136 QTAILQ_FOREACH_SAFE(vc, &vlan->clients, next, next_vc) {
1137 qemu_del_vlan_client(vc);
1141 QTAILQ_FOREACH_SAFE(vc, &non_vlan_clients, next, next_vc) {
1142 qemu_del_vlan_client(vc);
1146 void net_check_clients(void)
1149 VLANClientState *vc;
1152 /* Don't warn about the default network setup that you get if
1153 * no command line -net or -netdev options are specified. There
1154 * are two cases that we would otherwise complain about:
1155 * (1) board doesn't support a NIC but the implicit "-net nic"
1157 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
1158 * sets up a nic that isn't connected to anything.
1164 QTAILQ_FOREACH(vlan, &vlans, next) {
1165 int has_nic = 0, has_host_dev = 0;
1167 QTAILQ_FOREACH(vc, &vlan->clients, next) {
1168 switch (vc->info->type) {
1169 case NET_CLIENT_OPTIONS_KIND_NIC:
1172 case NET_CLIENT_OPTIONS_KIND_USER:
1173 case NET_CLIENT_OPTIONS_KIND_TAP:
1174 case NET_CLIENT_OPTIONS_KIND_SOCKET:
1175 case NET_CLIENT_OPTIONS_KIND_VDE:
1181 if (has_host_dev && !has_nic)
1182 fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1183 if (has_nic && !has_host_dev)
1185 "Warning: vlan %d is not connected to host network\n",
1188 QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
1190 fprintf(stderr, "Warning: %s %s has no peer\n",
1191 vc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? "nic" : "netdev",
1196 /* Check that all NICs requested via -net nic actually got created.
1197 * NICs created via -device don't need to be checked here because
1198 * they are always instantiated.
1200 for (i = 0; i < MAX_NICS; i++) {
1201 NICInfo *nd = &nd_table[i];
1202 if (nd->used && !nd->instantiated) {
1203 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1204 "was not created (not supported by this machine?)\n",
1205 nd->name ? nd->name : "anonymous",
1206 nd->model ? nd->model : "unspecified");
1211 static int net_init_client(QemuOpts *opts, void *dummy)
1213 Error *local_err = NULL;
1215 net_client_init(opts, 0, &local_err);
1216 if (error_is_set(&local_err)) {
1217 qerror_report_err(local_err);
1218 error_free(local_err);
1225 static int net_init_netdev(QemuOpts *opts, void *dummy)
1227 Error *local_err = NULL;
1230 ret = net_client_init(opts, 1, &local_err);
1231 if (error_is_set(&local_err)) {
1232 qerror_report_err(local_err);
1233 error_free(local_err);
1240 int net_init_clients(void)
1242 QemuOptsList *net = qemu_find_opts("net");
1245 /* if no clients, we use a default config */
1246 qemu_opts_set(net, NULL, "type", "nic");
1248 qemu_opts_set(net, NULL, "type", "user");
1252 QTAILQ_INIT(&vlans);
1253 QTAILQ_INIT(&non_vlan_clients);
1255 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1)
1258 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) {
1265 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1267 #if defined(CONFIG_SLIRP)
1269 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1274 if (!qemu_opts_parse(opts_list, optarg, 1)) {
1284 unsigned compute_mcast_idx(const uint8_t *ep)
1291 for (i = 0; i < 6; i++) {
1293 for (j = 0; j < 8; j++) {
1294 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1298 crc = ((crc ^ POLYNOMIAL) | carry);