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)
169 QTAILQ_FOREACH(nc, &net_clients, next) {
173 if (strcmp(nc->model, model) == 0) {
178 return g_strdup_printf("%s.%d", model, id);
181 static void qemu_net_client_destructor(NetClientState *nc)
186 static void qemu_net_client_setup(NetClientState *nc,
188 NetClientState *peer,
191 NetClientDestructor *destructor)
194 nc->model = g_strdup(model);
196 nc->name = g_strdup(name);
198 nc->name = assign_name(nc, model);
206 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
208 nc->incoming_queue = qemu_new_net_queue(nc);
209 nc->destructor = destructor;
212 NetClientState *qemu_new_net_client(NetClientInfo *info,
213 NetClientState *peer,
219 assert(info->size >= sizeof(NetClientState));
221 nc = g_malloc0(info->size);
222 qemu_net_client_setup(nc, info, peer, model, name,
223 qemu_net_client_destructor);
228 NICState *qemu_new_nic(NetClientInfo *info,
234 NetClientState **peers = conf->peers.ncs;
236 int i, queues = MAX(1, conf->queues);
238 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
239 assert(info->size >= sizeof(NICState));
241 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
242 nic->ncs = (void *)nic + info->size;
244 nic->opaque = opaque;
246 for (i = 0; i < queues; i++) {
247 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
249 nic->ncs[i].queue_index = i;
255 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
257 return nic->ncs + queue_index;
260 NetClientState *qemu_get_queue(NICState *nic)
262 return qemu_get_subqueue(nic, 0);
265 NICState *qemu_get_nic(NetClientState *nc)
267 NetClientState *nc0 = nc - nc->queue_index;
269 return (NICState *)((void *)nc0 - nc->info->size);
272 void *qemu_get_nic_opaque(NetClientState *nc)
274 NICState *nic = qemu_get_nic(nc);
279 static void qemu_cleanup_net_client(NetClientState *nc)
281 QTAILQ_REMOVE(&net_clients, nc, next);
283 if (nc->info->cleanup) {
284 nc->info->cleanup(nc);
288 static void qemu_free_net_client(NetClientState *nc)
290 if (nc->incoming_queue) {
291 qemu_del_net_queue(nc->incoming_queue);
294 nc->peer->peer = NULL;
298 if (nc->destructor) {
303 void qemu_del_net_client(NetClientState *nc)
305 NetClientState *ncs[MAX_QUEUE_NUM];
308 /* If the NetClientState belongs to a multiqueue backend, we will change all
309 * other NetClientStates also.
311 queues = qemu_find_net_clients_except(nc->name, ncs,
312 NET_CLIENT_OPTIONS_KIND_NIC,
316 /* If there is a peer NIC, delete and cleanup client, but do not free. */
317 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
318 NICState *nic = qemu_get_nic(nc->peer);
319 if (nic->peer_deleted) {
322 nic->peer_deleted = true;
324 for (i = 0; i < queues; i++) {
325 ncs[i]->peer->link_down = true;
328 if (nc->peer->info->link_status_changed) {
329 nc->peer->info->link_status_changed(nc->peer);
332 for (i = 0; i < queues; i++) {
333 qemu_cleanup_net_client(ncs[i]);
339 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
341 for (i = 0; i < queues; i++) {
342 qemu_cleanup_net_client(ncs[i]);
343 qemu_free_net_client(ncs[i]);
347 void qemu_del_nic(NICState *nic)
349 int i, queues = MAX(nic->conf->queues, 1);
351 /* If this is a peer NIC and peer has already been deleted, free it now. */
352 if (nic->peer_deleted) {
353 for (i = 0; i < queues; i++) {
354 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
358 for (i = queues - 1; i >= 0; i--) {
359 NetClientState *nc = qemu_get_subqueue(nic, i);
361 qemu_cleanup_net_client(nc);
362 qemu_free_net_client(nc);
368 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
372 QTAILQ_FOREACH(nc, &net_clients, next) {
373 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
374 if (nc->queue_index == 0) {
375 func(qemu_get_nic(nc), opaque);
381 bool qemu_has_ufo(NetClientState *nc)
383 if (!nc || !nc->info->has_ufo) {
387 return nc->info->has_ufo(nc);
390 bool qemu_has_vnet_hdr(NetClientState *nc)
392 if (!nc || !nc->info->has_vnet_hdr) {
396 return nc->info->has_vnet_hdr(nc);
399 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
401 if (!nc || !nc->info->has_vnet_hdr_len) {
405 return nc->info->has_vnet_hdr_len(nc, len);
408 void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
410 if (!nc || !nc->info->using_vnet_hdr) {
414 nc->info->using_vnet_hdr(nc, enable);
417 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
420 if (!nc || !nc->info->set_offload) {
424 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
427 void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
429 if (!nc || !nc->info->set_vnet_hdr_len) {
433 nc->info->set_vnet_hdr_len(nc, len);
436 int qemu_can_send_packet(NetClientState *sender)
442 if (sender->peer->receive_disabled) {
444 } else if (sender->peer->info->can_receive &&
445 !sender->peer->info->can_receive(sender->peer)) {
451 ssize_t qemu_deliver_packet(NetClientState *sender,
457 NetClientState *nc = opaque;
464 if (nc->receive_disabled) {
468 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
469 ret = nc->info->receive_raw(nc, data, size);
471 ret = nc->info->receive(nc, data, size);
475 nc->receive_disabled = 1;
481 void qemu_purge_queued_packets(NetClientState *nc)
487 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
490 void qemu_flush_queued_packets(NetClientState *nc)
492 nc->receive_disabled = 0;
494 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
495 if (net_hub_flush(nc->peer)) {
499 if (qemu_net_queue_flush(nc->incoming_queue)) {
500 /* We emptied the queue successfully, signal to the IO thread to repoll
501 * the file descriptor (for tap, for example).
507 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
509 const uint8_t *buf, int size,
510 NetPacketSent *sent_cb)
515 printf("qemu_send_packet_async:\n");
516 hex_dump(stdout, buf, size);
519 if (sender->link_down || !sender->peer) {
523 queue = sender->peer->incoming_queue;
525 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
528 ssize_t qemu_send_packet_async(NetClientState *sender,
529 const uint8_t *buf, int size,
530 NetPacketSent *sent_cb)
532 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
536 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
538 qemu_send_packet_async(nc, buf, size, NULL);
541 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
543 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
547 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
550 uint8_t buffer[NET_BUFSIZE];
553 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
555 return nc->info->receive(nc, buffer, offset);
558 ssize_t qemu_deliver_packet_iov(NetClientState *sender,
560 const struct iovec *iov,
564 NetClientState *nc = opaque;
568 return iov_size(iov, iovcnt);
571 if (nc->receive_disabled) {
575 if (nc->info->receive_iov) {
576 ret = nc->info->receive_iov(nc, iov, iovcnt);
578 ret = nc_sendv_compat(nc, iov, iovcnt);
582 nc->receive_disabled = 1;
588 ssize_t qemu_sendv_packet_async(NetClientState *sender,
589 const struct iovec *iov, int iovcnt,
590 NetPacketSent *sent_cb)
594 if (sender->link_down || !sender->peer) {
595 return iov_size(iov, iovcnt);
598 queue = sender->peer->incoming_queue;
600 return qemu_net_queue_send_iov(queue, sender,
601 QEMU_NET_PACKET_FLAG_NONE,
602 iov, iovcnt, sent_cb);
606 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
608 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
611 NetClientState *qemu_find_netdev(const char *id)
615 QTAILQ_FOREACH(nc, &net_clients, next) {
616 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
618 if (!strcmp(nc->name, id)) {
626 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
627 NetClientOptionsKind type, int max)
632 QTAILQ_FOREACH(nc, &net_clients, next) {
633 if (nc->info->type == type) {
636 if (!strcmp(nc->name, id)) {
647 static int nic_get_free_idx(void)
651 for (index = 0; index < MAX_NICS; index++)
652 if (!nd_table[index].used)
657 int qemu_show_nic_models(const char *arg, const char *const *models)
661 if (!arg || !is_help_option(arg)) {
665 fprintf(stderr, "qemu: Supported NIC models: ");
666 for (i = 0 ; models[i]; i++)
667 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
671 void qemu_check_nic_model(NICInfo *nd, const char *model)
673 const char *models[2];
678 if (qemu_show_nic_models(nd->model, models))
680 if (qemu_find_nic_model(nd, models, model) < 0)
684 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
685 const char *default_model)
690 nd->model = g_strdup(default_model);
692 for (i = 0 ; models[i]; i++) {
693 if (strcmp(nd->model, models[i]) == 0)
697 error_report("Unsupported NIC model: %s", nd->model);
701 static int net_init_nic(const NetClientOptions *opts, const char *name,
702 NetClientState *peer)
706 const NetLegacyNicOptions *nic;
708 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
711 idx = nic_get_free_idx();
712 if (idx == -1 || nb_nics >= MAX_NICS) {
713 error_report("Too Many NICs");
719 memset(nd, 0, sizeof(*nd));
721 if (nic->has_netdev) {
722 nd->netdev = qemu_find_netdev(nic->netdev);
724 error_report("netdev '%s' not found", nic->netdev);
731 nd->name = g_strdup(name);
732 if (nic->has_model) {
733 nd->model = g_strdup(nic->model);
736 nd->devaddr = g_strdup(nic->addr);
739 if (nic->has_macaddr &&
740 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
741 error_report("invalid syntax for ethernet address");
744 if (nic->has_macaddr &&
745 is_multicast_ether_addr(nd->macaddr.a)) {
746 error_report("NIC cannot have multicast MAC address (odd 1st byte)");
749 qemu_macaddr_default_if_unset(&nd->macaddr);
751 if (nic->has_vectors) {
752 if (nic->vectors > 0x7ffffff) {
753 error_report("invalid # of vectors: %"PRIu32, nic->vectors);
756 nd->nvectors = nic->vectors;
758 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
768 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
769 const NetClientOptions *opts,
771 NetClientState *peer) = {
772 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
774 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
776 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
777 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
779 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
782 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap,
784 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
785 #ifdef CONFIG_NET_BRIDGE
786 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
788 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
792 static int net_client_init1(const void *object, int is_netdev, Error **errp)
795 const Netdev *netdev;
796 const NetLegacy *net;
798 const NetClientOptions *opts;
803 opts = u.netdev->opts;
806 switch (opts->kind) {
808 case NET_CLIENT_OPTIONS_KIND_USER:
810 case NET_CLIENT_OPTIONS_KIND_TAP:
811 case NET_CLIENT_OPTIONS_KIND_SOCKET:
813 case NET_CLIENT_OPTIONS_KIND_VDE:
816 case NET_CLIENT_OPTIONS_KIND_NETMAP:
818 #ifdef CONFIG_NET_BRIDGE
819 case NET_CLIENT_OPTIONS_KIND_BRIDGE:
821 case NET_CLIENT_OPTIONS_KIND_HUBPORT:
825 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
826 "a netdev backend type");
832 /* missing optional values have been initialized to "all bits zero" */
833 name = u.net->has_id ? u.net->id : u.net->name;
836 if (net_client_init_fun[opts->kind]) {
837 NetClientState *peer = NULL;
839 /* Do not add to a vlan if it's a -netdev or a nic with a netdev=
842 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
843 !opts->nic->has_netdev)) {
844 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL);
847 if (net_client_init_fun[opts->kind](opts, name, peer) < 0) {
848 /* TODO push error reporting into init() methods */
849 error_set(errp, QERR_DEVICE_INIT_FAILED,
850 NetClientOptionsKind_lookup[opts->kind]);
858 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
861 visit_type_Netdev(v, (Netdev **)object, NULL, errp);
863 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
868 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
875 OptsVisitor *ov = opts_visitor_new(opts);
877 net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
878 opts_visitor_cleanup(ov);
882 ret = net_client_init1(object, is_netdev, &err);
886 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
888 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
889 qapi_dealloc_visitor_cleanup(dv);
892 error_propagate(errp, err);
897 static int net_host_check_device(const char *device)
900 const char *valid_param_list[] = { "tap", "socket", "dump"
901 #ifdef CONFIG_NET_BRIDGE
911 for (i = 0; i < ARRAY_SIZE(valid_param_list); i++) {
912 if (!strncmp(valid_param_list[i], device,
913 strlen(valid_param_list[i])))
920 void net_host_device_add(Monitor *mon, const QDict *qdict)
922 const char *device = qdict_get_str(qdict, "device");
923 const char *opts_str = qdict_get_try_str(qdict, "opts");
924 Error *local_err = NULL;
927 if (!net_host_check_device(device)) {
928 monitor_printf(mon, "invalid host network device %s\n", device);
932 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
937 qemu_opt_set(opts, "type", device);
939 net_client_init(opts, 0, &local_err);
941 qerror_report_err(local_err);
942 error_free(local_err);
943 monitor_printf(mon, "adding host network device %s failed\n", device);
947 void net_host_device_remove(Monitor *mon, const QDict *qdict)
950 int vlan_id = qdict_get_int(qdict, "vlan_id");
951 const char *device = qdict_get_str(qdict, "device");
953 nc = net_hub_find_client_by_name(vlan_id, device);
957 if (!net_host_check_device(nc->model)) {
958 monitor_printf(mon, "invalid host network device %s\n", device);
961 qemu_del_net_client(nc);
964 void netdev_add(QemuOpts *opts, Error **errp)
966 net_client_init(opts, 1, errp);
969 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret)
971 Error *local_err = NULL;
972 QemuOptsList *opts_list;
975 opts_list = qemu_find_opts_err("netdev", &local_err);
980 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
985 netdev_add(opts, &local_err);
994 qerror_report_err(local_err);
995 error_free(local_err);
999 void qmp_netdev_del(const char *id, Error **errp)
1004 nc = qemu_find_netdev(id);
1006 error_set(errp, QERR_DEVICE_NOT_FOUND, id);
1010 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
1012 error_setg(errp, "Device '%s' is not a netdev", id);
1016 qemu_del_net_client(nc);
1017 qemu_opts_del(opts);
1020 void print_net_client(Monitor *mon, NetClientState *nc)
1022 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
1024 NetClientOptionsKind_lookup[nc->info->type],
1028 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
1032 RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
1034 QTAILQ_FOREACH(nc, &net_clients, next) {
1035 RxFilterInfoList *entry;
1038 if (has_name && strcmp(nc->name, name) != 0) {
1042 /* only query rx-filter information of NIC */
1043 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) {
1045 error_setg(errp, "net client(%s) isn't a NIC", name);
1051 if (nc->info->query_rx_filter) {
1052 info = nc->info->query_rx_filter(nc);
1053 entry = g_malloc0(sizeof(*entry));
1054 entry->value = info;
1057 filter_list = entry;
1059 last_entry->next = entry;
1062 } else if (has_name) {
1063 error_setg(errp, "net client(%s) doesn't support"
1064 " rx-filter querying", name);
1069 if (filter_list == NULL && !error_is_set(errp) && has_name) {
1070 error_setg(errp, "invalid net client name: %s", name);
1076 void do_info_network(Monitor *mon, const QDict *qdict)
1078 NetClientState *nc, *peer;
1079 NetClientOptionsKind type;
1083 QTAILQ_FOREACH(nc, &net_clients, next) {
1085 type = nc->info->type;
1087 /* Skip if already printed in hub info */
1088 if (net_hub_id_for_client(nc, NULL) == 0) {
1092 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
1093 print_net_client(mon, nc);
1094 } /* else it's a netdev connected to a NIC, printed with the NIC */
1095 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
1096 monitor_printf(mon, " \\ ");
1097 print_net_client(mon, peer);
1102 void qmp_set_link(const char *name, bool up, Error **errp)
1104 NetClientState *ncs[MAX_QUEUE_NUM];
1108 queues = qemu_find_net_clients_except(name, ncs,
1109 NET_CLIENT_OPTIONS_KIND_MAX,
1113 error_set(errp, QERR_DEVICE_NOT_FOUND, name);
1118 for (i = 0; i < queues; i++) {
1119 ncs[i]->link_down = !up;
1122 if (nc->info->link_status_changed) {
1123 nc->info->link_status_changed(nc);
1127 /* Change peer link only if the peer is NIC and then notify peer.
1128 * If the peer is a HUBPORT or a backend, we do not change the
1131 * This behavior is compatible with qemu vlans where there could be
1132 * multiple clients that can still communicate with each other in
1133 * disconnected mode. For now maintain this compatibility.
1135 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1136 for (i = 0; i < queues; i++) {
1137 ncs[i]->peer->link_down = !up;
1140 if (nc->peer->info->link_status_changed) {
1141 nc->peer->info->link_status_changed(nc->peer);
1146 void net_cleanup(void)
1150 /* We may del multiple entries during qemu_del_net_client(),
1151 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1153 while (!QTAILQ_EMPTY(&net_clients)) {
1154 nc = QTAILQ_FIRST(&net_clients);
1155 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1156 qemu_del_nic(qemu_get_nic(nc));
1158 qemu_del_net_client(nc);
1163 void net_check_clients(void)
1168 /* Don't warn about the default network setup that you get if
1169 * no command line -net or -netdev options are specified. There
1170 * are two cases that we would otherwise complain about:
1171 * (1) board doesn't support a NIC but the implicit "-net nic"
1173 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
1174 * sets up a nic that isn't connected to anything.
1180 net_hub_check_clients();
1182 QTAILQ_FOREACH(nc, &net_clients, next) {
1184 fprintf(stderr, "Warning: %s %s has no peer\n",
1185 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
1186 "nic" : "netdev", nc->name);
1190 /* Check that all NICs requested via -net nic actually got created.
1191 * NICs created via -device don't need to be checked here because
1192 * they are always instantiated.
1194 for (i = 0; i < MAX_NICS; i++) {
1195 NICInfo *nd = &nd_table[i];
1196 if (nd->used && !nd->instantiated) {
1197 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1198 "was not created (not supported by this machine?)\n",
1199 nd->name ? nd->name : "anonymous",
1200 nd->model ? nd->model : "unspecified");
1205 static int net_init_client(QemuOpts *opts, void *dummy)
1207 Error *local_err = NULL;
1209 net_client_init(opts, 0, &local_err);
1211 qerror_report_err(local_err);
1212 error_free(local_err);
1219 static int net_init_netdev(QemuOpts *opts, void *dummy)
1221 Error *local_err = NULL;
1224 ret = net_client_init(opts, 1, &local_err);
1226 qerror_report_err(local_err);
1227 error_free(local_err);
1234 int net_init_clients(void)
1236 QemuOptsList *net = qemu_find_opts("net");
1239 /* if no clients, we use a default config */
1240 qemu_opts_set(net, NULL, "type", "nic");
1242 qemu_opts_set(net, NULL, "type", "user");
1246 QTAILQ_INIT(&net_clients);
1248 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1)
1251 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) {
1258 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1260 #if defined(CONFIG_SLIRP)
1262 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1267 if (!qemu_opts_parse(opts_list, optarg, 1)) {
1277 unsigned compute_mcast_idx(const uint8_t *ep)
1284 for (i = 0; i < 6; i++) {
1286 for (j = 0; j < 8; j++) {
1287 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1291 crc = ((crc ^ POLYNOMIAL) | carry);
1298 QemuOptsList qemu_netdev_opts = {
1300 .implied_opt_name = "type",
1301 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1304 * no elements => accept any params
1305 * validation will happen later
1307 { /* end of list */ }
1311 QemuOptsList qemu_net_opts = {
1313 .implied_opt_name = "type",
1314 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1317 * no elements => accept any params
1318 * validation will happen later
1320 { /* end of list */ }