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"
44 #include "sysemu/sysemu.h"
46 /* Net bridge is currently not supported for W32. */
48 # define CONFIG_NET_BRIDGE
51 static VMChangeStateEntry *net_change_state_entry;
52 static QTAILQ_HEAD(, NetClientState) net_clients;
54 const char *host_net_devices[] = {
58 #ifdef CONFIG_NET_BRIDGE
73 /***********************************************************/
74 /* network device redirectors */
76 #if defined(DEBUG_NET)
77 static void hex_dump(FILE *f, const uint8_t *buf, int size)
81 for(i=0;i<size;i+=16) {
85 fprintf(f, "%08x ", i);
88 fprintf(f, " %02x", buf[i+j]);
95 if (c < ' ' || c > '~')
104 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
115 if (len > buf_size - 1)
124 int parse_host_port(struct sockaddr_in *saddr, const char *str)
132 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
134 saddr->sin_family = AF_INET;
135 if (buf[0] == '\0') {
136 saddr->sin_addr.s_addr = 0;
138 if (qemu_isdigit(buf[0])) {
139 if (!inet_aton(buf, &saddr->sin_addr))
142 if ((he = gethostbyname(buf)) == NULL)
144 saddr->sin_addr = *(struct in_addr *)he->h_addr;
147 port = strtol(p, (char **)&r, 0);
150 saddr->sin_port = htons(port);
154 char *qemu_mac_strdup_printf(const uint8_t *macaddr)
156 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
157 macaddr[0], macaddr[1], macaddr[2],
158 macaddr[3], macaddr[4], macaddr[5]);
161 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6])
163 snprintf(nc->info_str, sizeof(nc->info_str),
164 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
166 macaddr[0], macaddr[1], macaddr[2],
167 macaddr[3], macaddr[4], macaddr[5]);
170 static int mac_table[256] = {0};
172 static void qemu_macaddr_set_used(MACAddr *macaddr)
176 for (index = 0x56; index < 0xFF; index++) {
177 if (macaddr->a[5] == index) {
183 static void qemu_macaddr_set_free(MACAddr *macaddr)
186 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
188 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
191 for (index = 0x56; index < 0xFF; index++) {
192 if (macaddr->a[5] == index) {
198 static int qemu_macaddr_get_free(void)
202 for (index = 0x56; index < 0xFF; index++) {
203 if (mac_table[index] == 0) {
211 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
213 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
214 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
216 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) {
217 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
220 qemu_macaddr_set_used(macaddr);
225 macaddr->a[0] = 0x52;
226 macaddr->a[1] = 0x54;
227 macaddr->a[2] = 0x00;
228 macaddr->a[3] = 0x12;
229 macaddr->a[4] = 0x34;
230 macaddr->a[5] = qemu_macaddr_get_free();
231 qemu_macaddr_set_used(macaddr);
235 * Generate a name for net client
237 * Only net clients created with the legacy -net option and NICs need this.
239 static char *assign_name(NetClientState *nc1, const char *model)
244 QTAILQ_FOREACH(nc, &net_clients, next) {
248 if (strcmp(nc->model, model) == 0) {
253 return g_strdup_printf("%s.%d", model, id);
256 static void qemu_net_client_destructor(NetClientState *nc)
261 static void qemu_net_client_setup(NetClientState *nc,
263 NetClientState *peer,
266 NetClientDestructor *destructor)
269 nc->model = g_strdup(model);
271 nc->name = g_strdup(name);
273 nc->name = assign_name(nc, model);
281 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
283 nc->incoming_queue = qemu_new_net_queue(nc);
284 nc->destructor = destructor;
287 NetClientState *qemu_new_net_client(NetClientInfo *info,
288 NetClientState *peer,
294 assert(info->size >= sizeof(NetClientState));
296 nc = g_malloc0(info->size);
297 qemu_net_client_setup(nc, info, peer, model, name,
298 qemu_net_client_destructor);
303 NICState *qemu_new_nic(NetClientInfo *info,
309 NetClientState **peers = conf->peers.ncs;
311 int i, queues = MAX(1, conf->peers.queues);
313 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
314 assert(info->size >= sizeof(NICState));
316 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
317 nic->ncs = (void *)nic + info->size;
319 nic->opaque = opaque;
321 for (i = 0; i < queues; i++) {
322 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
324 nic->ncs[i].queue_index = i;
330 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
332 return nic->ncs + queue_index;
335 NetClientState *qemu_get_queue(NICState *nic)
337 return qemu_get_subqueue(nic, 0);
340 NICState *qemu_get_nic(NetClientState *nc)
342 NetClientState *nc0 = nc - nc->queue_index;
344 return (NICState *)((void *)nc0 - nc->info->size);
347 void *qemu_get_nic_opaque(NetClientState *nc)
349 NICState *nic = qemu_get_nic(nc);
354 static void qemu_cleanup_net_client(NetClientState *nc)
356 QTAILQ_REMOVE(&net_clients, nc, next);
358 if (nc->info->cleanup) {
359 nc->info->cleanup(nc);
363 static void qemu_free_net_client(NetClientState *nc)
365 if (nc->incoming_queue) {
366 qemu_del_net_queue(nc->incoming_queue);
369 nc->peer->peer = NULL;
373 if (nc->destructor) {
378 void qemu_del_net_client(NetClientState *nc)
380 NetClientState *ncs[MAX_QUEUE_NUM];
383 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
385 /* If the NetClientState belongs to a multiqueue backend, we will change all
386 * other NetClientStates also.
388 queues = qemu_find_net_clients_except(nc->name, ncs,
389 NET_CLIENT_OPTIONS_KIND_NIC,
393 /* If there is a peer NIC, delete and cleanup client, but do not free. */
394 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
395 NICState *nic = qemu_get_nic(nc->peer);
396 if (nic->peer_deleted) {
399 nic->peer_deleted = true;
401 for (i = 0; i < queues; i++) {
402 ncs[i]->peer->link_down = true;
405 if (nc->peer->info->link_status_changed) {
406 nc->peer->info->link_status_changed(nc->peer);
409 for (i = 0; i < queues; i++) {
410 qemu_cleanup_net_client(ncs[i]);
416 for (i = 0; i < queues; i++) {
417 qemu_cleanup_net_client(ncs[i]);
418 qemu_free_net_client(ncs[i]);
422 void qemu_del_nic(NICState *nic)
424 int i, queues = MAX(nic->conf->peers.queues, 1);
426 qemu_macaddr_set_free(&nic->conf->macaddr);
428 /* If this is a peer NIC and peer has already been deleted, free it now. */
429 if (nic->peer_deleted) {
430 for (i = 0; i < queues; i++) {
431 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
435 for (i = queues - 1; i >= 0; i--) {
436 NetClientState *nc = qemu_get_subqueue(nic, i);
438 qemu_cleanup_net_client(nc);
439 qemu_free_net_client(nc);
445 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
449 QTAILQ_FOREACH(nc, &net_clients, next) {
450 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
451 if (nc->queue_index == 0) {
452 func(qemu_get_nic(nc), opaque);
458 bool qemu_has_ufo(NetClientState *nc)
460 if (!nc || !nc->info->has_ufo) {
464 return nc->info->has_ufo(nc);
467 bool qemu_has_vnet_hdr(NetClientState *nc)
469 if (!nc || !nc->info->has_vnet_hdr) {
473 return nc->info->has_vnet_hdr(nc);
476 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
478 if (!nc || !nc->info->has_vnet_hdr_len) {
482 return nc->info->has_vnet_hdr_len(nc, len);
485 void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
487 if (!nc || !nc->info->using_vnet_hdr) {
491 nc->info->using_vnet_hdr(nc, enable);
494 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
497 if (!nc || !nc->info->set_offload) {
501 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
504 void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
506 if (!nc || !nc->info->set_vnet_hdr_len) {
510 nc->info->set_vnet_hdr_len(nc, len);
513 int qemu_can_send_packet(NetClientState *sender)
515 int vm_running = runstate_is_running();
525 if (sender->peer->receive_disabled) {
527 } else if (sender->peer->info->can_receive &&
528 !sender->peer->info->can_receive(sender->peer)) {
534 ssize_t qemu_deliver_packet(NetClientState *sender,
540 NetClientState *nc = opaque;
547 if (nc->receive_disabled) {
551 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
552 ret = nc->info->receive_raw(nc, data, size);
554 ret = nc->info->receive(nc, data, size);
558 nc->receive_disabled = 1;
564 void qemu_purge_queued_packets(NetClientState *nc)
570 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
574 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge)
576 nc->receive_disabled = 0;
578 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
579 if (net_hub_flush(nc->peer)) {
583 if (qemu_net_queue_flush(nc->incoming_queue)) {
584 /* We emptied the queue successfully, signal to the IO thread to repoll
585 * the file descriptor (for tap, for example).
589 /* Unable to empty the queue, purge remaining packets */
590 qemu_net_queue_purge(nc->incoming_queue, nc);
594 void qemu_flush_queued_packets(NetClientState *nc)
596 qemu_flush_or_purge_queued_packets(nc, false);
599 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
601 const uint8_t *buf, int size,
602 NetPacketSent *sent_cb)
607 printf("qemu_send_packet_async:\n");
608 hex_dump(stdout, buf, size);
611 if (sender->link_down || !sender->peer) {
615 queue = sender->peer->incoming_queue;
617 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
620 ssize_t qemu_send_packet_async(NetClientState *sender,
621 const uint8_t *buf, int size,
622 NetPacketSent *sent_cb)
624 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
628 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
630 qemu_send_packet_async(nc, buf, size, NULL);
633 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
635 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
639 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
642 uint8_t buffer[NET_BUFSIZE];
645 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
647 return nc->info->receive(nc, buffer, offset);
650 ssize_t qemu_deliver_packet_iov(NetClientState *sender,
652 const struct iovec *iov,
656 NetClientState *nc = opaque;
660 return iov_size(iov, iovcnt);
663 if (nc->receive_disabled) {
667 if (nc->info->receive_iov) {
668 ret = nc->info->receive_iov(nc, iov, iovcnt);
670 ret = nc_sendv_compat(nc, iov, iovcnt);
674 nc->receive_disabled = 1;
680 ssize_t qemu_sendv_packet_async(NetClientState *sender,
681 const struct iovec *iov, int iovcnt,
682 NetPacketSent *sent_cb)
686 if (sender->link_down || !sender->peer) {
687 return iov_size(iov, iovcnt);
690 queue = sender->peer->incoming_queue;
692 return qemu_net_queue_send_iov(queue, sender,
693 QEMU_NET_PACKET_FLAG_NONE,
694 iov, iovcnt, sent_cb);
698 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
700 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
703 NetClientState *qemu_find_netdev(const char *id)
707 QTAILQ_FOREACH(nc, &net_clients, next) {
708 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
710 if (!strcmp(nc->name, id)) {
718 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
719 NetClientOptionsKind type, int max)
724 QTAILQ_FOREACH(nc, &net_clients, next) {
725 if (nc->info->type == type) {
728 if (!id || !strcmp(nc->name, id)) {
739 static int nic_get_free_idx(void)
743 for (index = 0; index < MAX_NICS; index++)
744 if (!nd_table[index].used)
749 int qemu_show_nic_models(const char *arg, const char *const *models)
753 if (!arg || !is_help_option(arg)) {
757 fprintf(stderr, "qemu: Supported NIC models: ");
758 for (i = 0 ; models[i]; i++)
759 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
763 void qemu_check_nic_model(NICInfo *nd, const char *model)
765 const char *models[2];
770 if (qemu_show_nic_models(nd->model, models))
772 if (qemu_find_nic_model(nd, models, model) < 0)
776 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
777 const char *default_model)
782 nd->model = g_strdup(default_model);
784 for (i = 0 ; models[i]; i++) {
785 if (strcmp(nd->model, models[i]) == 0)
789 error_report("Unsupported NIC model: %s", nd->model);
793 static int net_init_nic(const NetClientOptions *opts, const char *name,
794 NetClientState *peer, Error **errp)
798 const NetLegacyNicOptions *nic;
800 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
803 idx = nic_get_free_idx();
804 if (idx == -1 || nb_nics >= MAX_NICS) {
805 error_setg(errp, "too many NICs");
811 memset(nd, 0, sizeof(*nd));
813 if (nic->has_netdev) {
814 nd->netdev = qemu_find_netdev(nic->netdev);
816 error_setg(errp, "netdev '%s' not found", nic->netdev);
823 nd->name = g_strdup(name);
824 if (nic->has_model) {
825 nd->model = g_strdup(nic->model);
828 nd->devaddr = g_strdup(nic->addr);
831 if (nic->has_macaddr &&
832 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
833 error_setg(errp, "invalid syntax for ethernet address");
836 if (nic->has_macaddr &&
837 is_multicast_ether_addr(nd->macaddr.a)) {
839 "NIC cannot have multicast MAC address (odd 1st byte)");
842 qemu_macaddr_default_if_unset(&nd->macaddr);
844 if (nic->has_vectors) {
845 if (nic->vectors > 0x7ffffff) {
846 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors);
849 nd->nvectors = nic->vectors;
851 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
861 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
862 const NetClientOptions *opts,
864 NetClientState *peer, Error **errp) = {
865 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
867 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
869 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
870 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
872 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
875 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap,
877 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
878 #ifdef CONFIG_NET_BRIDGE
879 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
881 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
882 #ifdef CONFIG_VHOST_NET_USED
883 [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user,
886 [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3,
891 static int net_client_init1(const void *object, int is_netdev, Error **errp)
894 const Netdev *netdev;
895 const NetLegacy *net;
897 const NetClientOptions *opts;
902 opts = u.netdev->opts;
905 switch (opts->kind) {
907 case NET_CLIENT_OPTIONS_KIND_USER:
909 case NET_CLIENT_OPTIONS_KIND_TAP:
910 case NET_CLIENT_OPTIONS_KIND_SOCKET:
912 case NET_CLIENT_OPTIONS_KIND_VDE:
915 case NET_CLIENT_OPTIONS_KIND_NETMAP:
917 #ifdef CONFIG_NET_BRIDGE
918 case NET_CLIENT_OPTIONS_KIND_BRIDGE:
920 case NET_CLIENT_OPTIONS_KIND_HUBPORT:
921 #ifdef CONFIG_VHOST_NET_USED
922 case NET_CLIENT_OPTIONS_KIND_VHOST_USER:
925 case NET_CLIENT_OPTIONS_KIND_L2TPV3:
930 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
931 "a netdev backend type");
937 if (opts->kind == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
938 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
942 /* missing optional values have been initialized to "all bits zero" */
943 name = u.net->has_id ? u.net->id : u.net->name;
946 if (net_client_init_fun[opts->kind]) {
947 NetClientState *peer = NULL;
949 /* Do not add to a vlan if it's a -netdev or a nic with a netdev=
952 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
953 !opts->nic->has_netdev)) {
954 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL);
957 if (net_client_init_fun[opts->kind](opts, name, peer, errp) < 0) {
958 /* FIXME drop when all init functions store an Error */
959 if (errp && !*errp) {
960 error_set(errp, QERR_DEVICE_INIT_FAILED,
961 NetClientOptionsKind_lookup[opts->kind]);
970 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
973 visit_type_Netdev(v, (Netdev **)object, NULL, errp);
975 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
980 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
987 OptsVisitor *ov = opts_visitor_new(opts);
989 net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
990 opts_visitor_cleanup(ov);
994 ret = net_client_init1(object, is_netdev, &err);
998 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
1000 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
1001 qapi_dealloc_visitor_cleanup(dv);
1004 error_propagate(errp, err);
1009 static int net_host_check_device(const char *device)
1012 for (i = 0; host_net_devices[i]; i++) {
1013 if (!strncmp(host_net_devices[i], device,
1014 strlen(host_net_devices[i]))) {
1022 void hmp_host_net_add(Monitor *mon, const QDict *qdict)
1024 const char *device = qdict_get_str(qdict, "device");
1025 const char *opts_str = qdict_get_try_str(qdict, "opts");
1026 Error *local_err = NULL;
1029 if (!net_host_check_device(device)) {
1030 monitor_printf(mon, "invalid host network device %s\n", device);
1034 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
1039 qemu_opt_set(opts, "type", device, &error_abort);
1041 net_client_init(opts, 0, &local_err);
1043 error_report_err(local_err);
1044 monitor_printf(mon, "adding host network device %s failed\n", device);
1048 void hmp_host_net_remove(Monitor *mon, const QDict *qdict)
1051 int vlan_id = qdict_get_int(qdict, "vlan_id");
1052 const char *device = qdict_get_str(qdict, "device");
1054 nc = net_hub_find_client_by_name(vlan_id, device);
1056 error_report("Host network device '%s' on hub '%d' not found",
1060 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1061 error_report("invalid host network device '%s'", device);
1065 qemu_del_net_client(nc->peer);
1066 qemu_del_net_client(nc);
1069 void netdev_add(QemuOpts *opts, Error **errp)
1071 net_client_init(opts, 1, errp);
1074 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret)
1076 Error *local_err = NULL;
1077 QemuOptsList *opts_list;
1080 opts_list = qemu_find_opts_err("netdev", &local_err);
1085 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
1090 netdev_add(opts, &local_err);
1092 qemu_opts_del(opts);
1099 qerror_report_err(local_err);
1100 error_free(local_err);
1104 void qmp_netdev_del(const char *id, Error **errp)
1109 nc = qemu_find_netdev(id);
1111 error_set(errp, QERR_DEVICE_NOT_FOUND, id);
1115 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
1117 error_setg(errp, "Device '%s' is not a netdev", id);
1121 qemu_del_net_client(nc);
1122 qemu_opts_del(opts);
1125 void print_net_client(Monitor *mon, NetClientState *nc)
1127 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
1129 NetClientOptionsKind_lookup[nc->info->type],
1133 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
1137 RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
1139 QTAILQ_FOREACH(nc, &net_clients, next) {
1140 RxFilterInfoList *entry;
1143 if (has_name && strcmp(nc->name, name) != 0) {
1147 /* only query rx-filter information of NIC */
1148 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) {
1150 error_setg(errp, "net client(%s) isn't a NIC", name);
1156 if (nc->info->query_rx_filter) {
1157 info = nc->info->query_rx_filter(nc);
1158 entry = g_malloc0(sizeof(*entry));
1159 entry->value = info;
1162 filter_list = entry;
1164 last_entry->next = entry;
1167 } else if (has_name) {
1168 error_setg(errp, "net client(%s) doesn't support"
1169 " rx-filter querying", name);
1178 if (filter_list == NULL && has_name) {
1179 error_setg(errp, "invalid net client name: %s", name);
1185 void hmp_info_network(Monitor *mon, const QDict *qdict)
1187 NetClientState *nc, *peer;
1188 NetClientOptionsKind type;
1192 QTAILQ_FOREACH(nc, &net_clients, next) {
1194 type = nc->info->type;
1196 /* Skip if already printed in hub info */
1197 if (net_hub_id_for_client(nc, NULL) == 0) {
1201 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
1202 print_net_client(mon, nc);
1203 } /* else it's a netdev connected to a NIC, printed with the NIC */
1204 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
1205 monitor_printf(mon, " \\ ");
1206 print_net_client(mon, peer);
1211 void qmp_set_link(const char *name, bool up, Error **errp)
1213 NetClientState *ncs[MAX_QUEUE_NUM];
1217 queues = qemu_find_net_clients_except(name, ncs,
1218 NET_CLIENT_OPTIONS_KIND_MAX,
1222 error_set(errp, QERR_DEVICE_NOT_FOUND, name);
1227 for (i = 0; i < queues; i++) {
1228 ncs[i]->link_down = !up;
1231 if (nc->info->link_status_changed) {
1232 nc->info->link_status_changed(nc);
1236 /* Change peer link only if the peer is NIC and then notify peer.
1237 * If the peer is a HUBPORT or a backend, we do not change the
1240 * This behavior is compatible with qemu vlans where there could be
1241 * multiple clients that can still communicate with each other in
1242 * disconnected mode. For now maintain this compatibility.
1244 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1245 for (i = 0; i < queues; i++) {
1246 ncs[i]->peer->link_down = !up;
1249 if (nc->peer->info->link_status_changed) {
1250 nc->peer->info->link_status_changed(nc->peer);
1255 static void net_vm_change_state_handler(void *opaque, int running,
1258 /* Complete all queued packets, to guarantee we don't modify
1259 * state later when VM is not running.
1263 NetClientState *tmp;
1265 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
1266 qemu_flush_or_purge_queued_packets(nc, true);
1271 void net_cleanup(void)
1275 /* We may del multiple entries during qemu_del_net_client(),
1276 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1278 while (!QTAILQ_EMPTY(&net_clients)) {
1279 nc = QTAILQ_FIRST(&net_clients);
1280 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1281 qemu_del_nic(qemu_get_nic(nc));
1283 qemu_del_net_client(nc);
1287 qemu_del_vm_change_state_handler(net_change_state_entry);
1290 void net_check_clients(void)
1295 /* Don't warn about the default network setup that you get if
1296 * no command line -net or -netdev options are specified. There
1297 * are two cases that we would otherwise complain about:
1298 * (1) board doesn't support a NIC but the implicit "-net nic"
1300 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
1301 * sets up a nic that isn't connected to anything.
1307 net_hub_check_clients();
1309 QTAILQ_FOREACH(nc, &net_clients, next) {
1311 fprintf(stderr, "Warning: %s %s has no peer\n",
1312 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
1313 "nic" : "netdev", nc->name);
1317 /* Check that all NICs requested via -net nic actually got created.
1318 * NICs created via -device don't need to be checked here because
1319 * they are always instantiated.
1321 for (i = 0; i < MAX_NICS; i++) {
1322 NICInfo *nd = &nd_table[i];
1323 if (nd->used && !nd->instantiated) {
1324 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1325 "was not created (not supported by this machine?)\n",
1326 nd->name ? nd->name : "anonymous",
1327 nd->model ? nd->model : "unspecified");
1332 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp)
1334 Error *local_err = NULL;
1336 net_client_init(opts, 0, &local_err);
1338 error_report_err(local_err);
1345 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp)
1347 Error *local_err = NULL;
1350 ret = net_client_init(opts, 1, &local_err);
1352 error_report_err(local_err);
1359 int net_init_clients(void)
1361 QemuOptsList *net = qemu_find_opts("net");
1364 /* if no clients, we use a default config */
1365 qemu_opts_set(net, NULL, "type", "nic", &error_abort);
1367 qemu_opts_set(net, NULL, "type", "user", &error_abort);
1371 net_change_state_entry =
1372 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
1374 QTAILQ_INIT(&net_clients);
1376 if (qemu_opts_foreach(qemu_find_opts("netdev"),
1377 net_init_netdev, NULL, NULL)) {
1381 if (qemu_opts_foreach(net, net_init_client, NULL, NULL)) {
1388 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1390 #if defined(CONFIG_SLIRP)
1392 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1397 if (!qemu_opts_parse(opts_list, optarg, 1)) {
1407 unsigned compute_mcast_idx(const uint8_t *ep)
1414 for (i = 0; i < 6; i++) {
1416 for (j = 0; j < 8; j++) {
1417 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1421 crc = ((crc ^ POLYNOMIAL) | carry);
1428 QemuOptsList qemu_netdev_opts = {
1430 .implied_opt_name = "type",
1431 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1434 * no elements => accept any params
1435 * validation will happen later
1437 { /* end of list */ }
1441 QemuOptsList qemu_net_opts = {
1443 .implied_opt_name = "type",
1444 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1447 * no elements => accept any params
1448 * validation will happen later
1450 { /* end of list */ }