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
24 #include "config-host.h"
29 #include "net/slirp.h"
33 #include "monitor/monitor.h"
34 #include "qemu-common.h"
35 #include "qemu/sockets.h"
36 #include "qemu/config-file.h"
37 #include "qmp-commands.h"
40 #include "qemu/main-loop.h"
41 #include "qapi-visit.h"
42 #include "qapi/opts-visitor.h"
43 #include "qapi/dealloc-visitor.h"
45 /* Net bridge is currently not supported for W32. */
47 # define CONFIG_NET_BRIDGE
50 static QTAILQ_HEAD(, NetClientState) net_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(NetClientState *nc, uint8_t macaddr[6])
137 snprintf(nc->info_str, sizeof(nc->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++;
160 * Generate a name for net client
162 * Only net clients created with the legacy -net option and NICs need this.
164 static char *assign_name(NetClientState *nc1, const char *model)
170 QTAILQ_FOREACH(nc, &net_clients, next) {
174 if (strcmp(nc->model, model) == 0) {
179 snprintf(buf, sizeof(buf), "%s.%d", model, id);
181 return g_strdup(buf);
184 static void qemu_net_client_destructor(NetClientState *nc)
189 static void qemu_net_client_setup(NetClientState *nc,
191 NetClientState *peer,
194 NetClientDestructor *destructor)
197 nc->model = g_strdup(model);
199 nc->name = g_strdup(name);
201 nc->name = assign_name(nc, model);
209 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
211 nc->incoming_queue = qemu_new_net_queue(nc);
212 nc->destructor = destructor;
215 NetClientState *qemu_new_net_client(NetClientInfo *info,
216 NetClientState *peer,
222 assert(info->size >= sizeof(NetClientState));
224 nc = g_malloc0(info->size);
225 qemu_net_client_setup(nc, info, peer, model, name,
226 qemu_net_client_destructor);
231 NICState *qemu_new_nic(NetClientInfo *info,
237 NetClientState **peers = conf->peers.ncs;
239 int i, queues = MAX(1, conf->queues);
241 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
242 assert(info->size >= sizeof(NICState));
244 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
245 nic->ncs = (void *)nic + info->size;
247 nic->opaque = opaque;
249 for (i = 0; i < queues; i++) {
250 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
252 nic->ncs[i].queue_index = i;
258 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
260 return nic->ncs + queue_index;
263 NetClientState *qemu_get_queue(NICState *nic)
265 return qemu_get_subqueue(nic, 0);
268 NICState *qemu_get_nic(NetClientState *nc)
270 NetClientState *nc0 = nc - nc->queue_index;
272 return (NICState *)((void *)nc0 - nc->info->size);
275 void *qemu_get_nic_opaque(NetClientState *nc)
277 NICState *nic = qemu_get_nic(nc);
282 static void qemu_cleanup_net_client(NetClientState *nc)
284 QTAILQ_REMOVE(&net_clients, nc, next);
286 if (nc->info->cleanup) {
287 nc->info->cleanup(nc);
291 static void qemu_free_net_client(NetClientState *nc)
293 if (nc->incoming_queue) {
294 qemu_del_net_queue(nc->incoming_queue);
297 nc->peer->peer = NULL;
301 if (nc->destructor) {
306 void qemu_del_net_client(NetClientState *nc)
308 NetClientState *ncs[MAX_QUEUE_NUM];
311 /* If the NetClientState belongs to a multiqueue backend, we will change all
312 * other NetClientStates also.
314 queues = qemu_find_net_clients_except(nc->name, ncs,
315 NET_CLIENT_OPTIONS_KIND_NIC,
319 /* If there is a peer NIC, delete and cleanup client, but do not free. */
320 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
321 NICState *nic = qemu_get_nic(nc->peer);
322 if (nic->peer_deleted) {
325 nic->peer_deleted = true;
327 for (i = 0; i < queues; i++) {
328 ncs[i]->peer->link_down = true;
331 if (nc->peer->info->link_status_changed) {
332 nc->peer->info->link_status_changed(nc->peer);
335 for (i = 0; i < queues; i++) {
336 qemu_cleanup_net_client(ncs[i]);
342 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
344 for (i = 0; i < queues; i++) {
345 qemu_cleanup_net_client(ncs[i]);
346 qemu_free_net_client(ncs[i]);
350 void qemu_del_nic(NICState *nic)
352 int i, queues = MAX(nic->conf->queues, 1);
354 /* If this is a peer NIC and peer has already been deleted, free it now. */
355 if (nic->peer_deleted) {
356 for (i = 0; i < queues; i++) {
357 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
361 for (i = queues - 1; i >= 0; i--) {
362 NetClientState *nc = qemu_get_subqueue(nic, i);
364 qemu_cleanup_net_client(nc);
365 qemu_free_net_client(nc);
371 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
375 QTAILQ_FOREACH(nc, &net_clients, next) {
376 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
377 if (nc->queue_index == 0) {
378 func(qemu_get_nic(nc), opaque);
384 int qemu_can_send_packet(NetClientState *sender)
390 if (sender->peer->receive_disabled) {
392 } else if (sender->peer->info->can_receive &&
393 !sender->peer->info->can_receive(sender->peer)) {
399 ssize_t qemu_deliver_packet(NetClientState *sender,
405 NetClientState *nc = opaque;
412 if (nc->receive_disabled) {
416 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
417 ret = nc->info->receive_raw(nc, data, size);
419 ret = nc->info->receive(nc, data, size);
423 nc->receive_disabled = 1;
429 void qemu_purge_queued_packets(NetClientState *nc)
435 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
438 void qemu_flush_queued_packets(NetClientState *nc)
440 nc->receive_disabled = 0;
442 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
443 if (net_hub_flush(nc->peer)) {
447 if (qemu_net_queue_flush(nc->incoming_queue)) {
448 /* We emptied the queue successfully, signal to the IO thread to repoll
449 * the file descriptor (for tap, for example).
455 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
457 const uint8_t *buf, int size,
458 NetPacketSent *sent_cb)
463 printf("qemu_send_packet_async:\n");
464 hex_dump(stdout, buf, size);
467 if (sender->link_down || !sender->peer) {
471 queue = sender->peer->incoming_queue;
473 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
476 ssize_t qemu_send_packet_async(NetClientState *sender,
477 const uint8_t *buf, int size,
478 NetPacketSent *sent_cb)
480 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
484 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
486 qemu_send_packet_async(nc, buf, size, NULL);
489 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
491 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
495 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
498 uint8_t buffer[NET_BUFSIZE];
501 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
503 return nc->info->receive(nc, buffer, offset);
506 ssize_t qemu_deliver_packet_iov(NetClientState *sender,
508 const struct iovec *iov,
512 NetClientState *nc = opaque;
516 return iov_size(iov, iovcnt);
519 if (nc->receive_disabled) {
523 if (nc->info->receive_iov) {
524 ret = nc->info->receive_iov(nc, iov, iovcnt);
526 ret = nc_sendv_compat(nc, iov, iovcnt);
530 nc->receive_disabled = 1;
536 ssize_t qemu_sendv_packet_async(NetClientState *sender,
537 const struct iovec *iov, int iovcnt,
538 NetPacketSent *sent_cb)
542 if (sender->link_down || !sender->peer) {
543 return iov_size(iov, iovcnt);
546 queue = sender->peer->incoming_queue;
548 return qemu_net_queue_send_iov(queue, sender,
549 QEMU_NET_PACKET_FLAG_NONE,
550 iov, iovcnt, sent_cb);
554 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
556 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
559 NetClientState *qemu_find_netdev(const char *id)
563 QTAILQ_FOREACH(nc, &net_clients, next) {
564 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
566 if (!strcmp(nc->name, id)) {
574 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
575 NetClientOptionsKind type, int max)
580 QTAILQ_FOREACH(nc, &net_clients, next) {
581 if (nc->info->type == type) {
584 if (!strcmp(nc->name, id)) {
595 static int nic_get_free_idx(void)
599 for (index = 0; index < MAX_NICS; index++)
600 if (!nd_table[index].used)
605 int qemu_show_nic_models(const char *arg, const char *const *models)
609 if (!arg || !is_help_option(arg)) {
613 fprintf(stderr, "qemu: Supported NIC models: ");
614 for (i = 0 ; models[i]; i++)
615 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
619 void qemu_check_nic_model(NICInfo *nd, const char *model)
621 const char *models[2];
626 if (qemu_show_nic_models(nd->model, models))
628 if (qemu_find_nic_model(nd, models, model) < 0)
632 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
633 const char *default_model)
638 nd->model = g_strdup(default_model);
640 for (i = 0 ; models[i]; i++) {
641 if (strcmp(nd->model, models[i]) == 0)
645 error_report("Unsupported NIC model: %s", nd->model);
649 static int net_init_nic(const NetClientOptions *opts, const char *name,
650 NetClientState *peer)
654 const NetLegacyNicOptions *nic;
656 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
659 idx = nic_get_free_idx();
660 if (idx == -1 || nb_nics >= MAX_NICS) {
661 error_report("Too Many NICs");
667 memset(nd, 0, sizeof(*nd));
669 if (nic->has_netdev) {
670 nd->netdev = qemu_find_netdev(nic->netdev);
672 error_report("netdev '%s' not found", nic->netdev);
679 nd->name = g_strdup(name);
680 if (nic->has_model) {
681 nd->model = g_strdup(nic->model);
684 nd->devaddr = g_strdup(nic->addr);
687 if (nic->has_macaddr &&
688 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
689 error_report("invalid syntax for ethernet address");
692 if (nic->has_macaddr &&
693 is_multicast_ether_addr(nd->macaddr.a)) {
694 error_report("NIC cannot have multicast MAC address (odd 1st byte)");
697 qemu_macaddr_default_if_unset(&nd->macaddr);
699 if (nic->has_vectors) {
700 if (nic->vectors > 0x7ffffff) {
701 error_report("invalid # of vectors: %"PRIu32, nic->vectors);
704 nd->nvectors = nic->vectors;
706 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
716 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
717 const NetClientOptions *opts,
719 NetClientState *peer) = {
720 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
722 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
724 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
725 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
727 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
730 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap,
732 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
733 #ifdef CONFIG_NET_BRIDGE
734 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
736 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
740 static int net_client_init1(const void *object, int is_netdev, Error **errp)
743 const Netdev *netdev;
744 const NetLegacy *net;
746 const NetClientOptions *opts;
751 opts = u.netdev->opts;
754 switch (opts->kind) {
756 case NET_CLIENT_OPTIONS_KIND_USER:
758 case NET_CLIENT_OPTIONS_KIND_TAP:
759 case NET_CLIENT_OPTIONS_KIND_SOCKET:
761 case NET_CLIENT_OPTIONS_KIND_VDE:
764 case NET_CLIENT_OPTIONS_KIND_NETMAP:
766 #ifdef CONFIG_NET_BRIDGE
767 case NET_CLIENT_OPTIONS_KIND_BRIDGE:
769 case NET_CLIENT_OPTIONS_KIND_HUBPORT:
773 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
774 "a netdev backend type");
780 /* missing optional values have been initialized to "all bits zero" */
781 name = u.net->has_id ? u.net->id : u.net->name;
784 if (net_client_init_fun[opts->kind]) {
785 NetClientState *peer = NULL;
787 /* Do not add to a vlan if it's a -netdev or a nic with a netdev=
790 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
791 !opts->nic->has_netdev)) {
792 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL);
795 if (net_client_init_fun[opts->kind](opts, name, peer) < 0) {
796 /* TODO push error reporting into init() methods */
797 error_set(errp, QERR_DEVICE_INIT_FAILED,
798 NetClientOptionsKind_lookup[opts->kind]);
806 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
809 visit_type_Netdev(v, (Netdev **)object, NULL, errp);
811 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
816 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
823 OptsVisitor *ov = opts_visitor_new(opts);
825 net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
826 opts_visitor_cleanup(ov);
830 ret = net_client_init1(object, is_netdev, &err);
834 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
836 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
837 qapi_dealloc_visitor_cleanup(dv);
840 error_propagate(errp, err);
845 static int net_host_check_device(const char *device)
848 const char *valid_param_list[] = { "tap", "socket", "dump"
849 #ifdef CONFIG_NET_BRIDGE
859 for (i = 0; i < ARRAY_SIZE(valid_param_list); i++) {
860 if (!strncmp(valid_param_list[i], device,
861 strlen(valid_param_list[i])))
868 void net_host_device_add(Monitor *mon, const QDict *qdict)
870 const char *device = qdict_get_str(qdict, "device");
871 const char *opts_str = qdict_get_try_str(qdict, "opts");
872 Error *local_err = NULL;
875 if (!net_host_check_device(device)) {
876 monitor_printf(mon, "invalid host network device %s\n", device);
880 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
885 qemu_opt_set(opts, "type", device);
887 net_client_init(opts, 0, &local_err);
888 if (error_is_set(&local_err)) {
889 qerror_report_err(local_err);
890 error_free(local_err);
891 monitor_printf(mon, "adding host network device %s failed\n", device);
895 void net_host_device_remove(Monitor *mon, const QDict *qdict)
898 int vlan_id = qdict_get_int(qdict, "vlan_id");
899 const char *device = qdict_get_str(qdict, "device");
901 nc = net_hub_find_client_by_name(vlan_id, device);
905 if (!net_host_check_device(nc->model)) {
906 monitor_printf(mon, "invalid host network device %s\n", device);
909 qemu_del_net_client(nc);
912 void netdev_add(QemuOpts *opts, Error **errp)
914 net_client_init(opts, 1, errp);
917 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret)
919 Error *local_err = NULL;
920 QemuOptsList *opts_list;
923 opts_list = qemu_find_opts_err("netdev", &local_err);
924 if (error_is_set(&local_err)) {
928 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
929 if (error_is_set(&local_err)) {
933 netdev_add(opts, &local_err);
934 if (error_is_set(&local_err)) {
942 qerror_report_err(local_err);
943 error_free(local_err);
947 void qmp_netdev_del(const char *id, Error **errp)
952 nc = qemu_find_netdev(id);
954 error_set(errp, QERR_DEVICE_NOT_FOUND, id);
958 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
960 error_setg(errp, "Device '%s' is not a netdev", id);
964 qemu_del_net_client(nc);
968 void print_net_client(Monitor *mon, NetClientState *nc)
970 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
972 NetClientOptionsKind_lookup[nc->info->type],
976 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
980 RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
982 QTAILQ_FOREACH(nc, &net_clients, next) {
983 RxFilterInfoList *entry;
986 if (has_name && strcmp(nc->name, name) != 0) {
990 /* only query rx-filter information of NIC */
991 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) {
993 error_setg(errp, "net client(%s) isn't a NIC", name);
999 if (nc->info->query_rx_filter) {
1000 info = nc->info->query_rx_filter(nc);
1001 entry = g_malloc0(sizeof(*entry));
1002 entry->value = info;
1005 filter_list = entry;
1007 last_entry->next = entry;
1010 } else if (has_name) {
1011 error_setg(errp, "net client(%s) doesn't support"
1012 " rx-filter querying", name);
1017 if (filter_list == NULL && !error_is_set(errp) && has_name) {
1018 error_setg(errp, "invalid net client name: %s", name);
1024 void do_info_network(Monitor *mon, const QDict *qdict)
1026 NetClientState *nc, *peer;
1027 NetClientOptionsKind type;
1031 QTAILQ_FOREACH(nc, &net_clients, next) {
1033 type = nc->info->type;
1035 /* Skip if already printed in hub info */
1036 if (net_hub_id_for_client(nc, NULL) == 0) {
1040 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
1041 print_net_client(mon, nc);
1042 } /* else it's a netdev connected to a NIC, printed with the NIC */
1043 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
1044 monitor_printf(mon, " \\ ");
1045 print_net_client(mon, peer);
1050 void qmp_set_link(const char *name, bool up, Error **errp)
1052 NetClientState *ncs[MAX_QUEUE_NUM];
1056 queues = qemu_find_net_clients_except(name, ncs,
1057 NET_CLIENT_OPTIONS_KIND_MAX,
1061 error_set(errp, QERR_DEVICE_NOT_FOUND, name);
1066 for (i = 0; i < queues; i++) {
1067 ncs[i]->link_down = !up;
1070 if (nc->info->link_status_changed) {
1071 nc->info->link_status_changed(nc);
1075 /* Change peer link only if the peer is NIC and then notify peer.
1076 * If the peer is a HUBPORT or a backend, we do not change the
1079 * This behavior is compatible with qemu vlans where there could be
1080 * multiple clients that can still communicate with each other in
1081 * disconnected mode. For now maintain this compatibility.
1083 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1084 for (i = 0; i < queues; i++) {
1085 ncs[i]->peer->link_down = !up;
1088 if (nc->peer->info->link_status_changed) {
1089 nc->peer->info->link_status_changed(nc->peer);
1094 void net_cleanup(void)
1098 /* We may del multiple entries during qemu_del_net_client(),
1099 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1101 while (!QTAILQ_EMPTY(&net_clients)) {
1102 nc = QTAILQ_FIRST(&net_clients);
1103 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1104 qemu_del_nic(qemu_get_nic(nc));
1106 qemu_del_net_client(nc);
1111 void net_check_clients(void)
1116 /* Don't warn about the default network setup that you get if
1117 * no command line -net or -netdev options are specified. There
1118 * are two cases that we would otherwise complain about:
1119 * (1) board doesn't support a NIC but the implicit "-net nic"
1121 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
1122 * sets up a nic that isn't connected to anything.
1128 net_hub_check_clients();
1130 QTAILQ_FOREACH(nc, &net_clients, next) {
1132 fprintf(stderr, "Warning: %s %s has no peer\n",
1133 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
1134 "nic" : "netdev", nc->name);
1138 /* Check that all NICs requested via -net nic actually got created.
1139 * NICs created via -device don't need to be checked here because
1140 * they are always instantiated.
1142 for (i = 0; i < MAX_NICS; i++) {
1143 NICInfo *nd = &nd_table[i];
1144 if (nd->used && !nd->instantiated) {
1145 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1146 "was not created (not supported by this machine?)\n",
1147 nd->name ? nd->name : "anonymous",
1148 nd->model ? nd->model : "unspecified");
1153 static int net_init_client(QemuOpts *opts, void *dummy)
1155 Error *local_err = NULL;
1157 net_client_init(opts, 0, &local_err);
1158 if (error_is_set(&local_err)) {
1159 qerror_report_err(local_err);
1160 error_free(local_err);
1167 static int net_init_netdev(QemuOpts *opts, void *dummy)
1169 Error *local_err = NULL;
1172 ret = net_client_init(opts, 1, &local_err);
1173 if (error_is_set(&local_err)) {
1174 qerror_report_err(local_err);
1175 error_free(local_err);
1182 int net_init_clients(void)
1184 QemuOptsList *net = qemu_find_opts("net");
1187 /* if no clients, we use a default config */
1188 qemu_opts_set(net, NULL, "type", "nic");
1190 qemu_opts_set(net, NULL, "type", "user");
1194 QTAILQ_INIT(&net_clients);
1196 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1)
1199 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) {
1206 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1208 #if defined(CONFIG_SLIRP)
1210 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1215 if (!qemu_opts_parse(opts_list, optarg, 1)) {
1225 unsigned compute_mcast_idx(const uint8_t *ep)
1232 for (i = 0; i < 6; i++) {
1234 for (j = 0; j < 8; j++) {
1235 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1239 crc = ((crc ^ POLYNOMIAL) | carry);
1246 QemuOptsList qemu_netdev_opts = {
1248 .implied_opt_name = "type",
1249 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1252 * no elements => accept any params
1253 * validation will happen later
1255 { /* end of list */ }
1259 QemuOptsList qemu_net_opts = {
1261 .implied_opt_name = "type",
1262 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1265 * no elements => accept any params
1266 * validation will happen later
1268 { /* end of list */ }