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 "qapi/qmp/qerror.h"
36 #include "qemu/error-report.h"
37 #include "qemu/sockets.h"
38 #include "qemu/config-file.h"
39 #include "qmp-commands.h"
42 #include "qemu/main-loop.h"
43 #include "qapi-visit.h"
44 #include "qapi/opts-visitor.h"
45 #include "qapi/dealloc-visitor.h"
46 #include "sysemu/sysemu.h"
47 #include "net/filter.h"
49 /* Net bridge is currently not supported for W32. */
51 # define CONFIG_NET_BRIDGE
54 static VMChangeStateEntry *net_change_state_entry;
55 static QTAILQ_HEAD(, NetClientState) net_clients;
57 const char *host_net_devices[] = {
61 #ifdef CONFIG_NET_BRIDGE
79 /***********************************************************/
80 /* network device redirectors */
82 #if defined(DEBUG_NET)
83 static void hex_dump(FILE *f, const uint8_t *buf, int size)
87 for(i=0;i<size;i+=16) {
91 fprintf(f, "%08x ", i);
94 fprintf(f, " %02x", buf[i+j]);
101 if (c < ' ' || c > '~')
110 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
121 if (len > buf_size - 1)
130 int parse_host_port(struct sockaddr_in *saddr, const char *str)
138 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
140 saddr->sin_family = AF_INET;
141 if (buf[0] == '\0') {
142 saddr->sin_addr.s_addr = 0;
144 if (qemu_isdigit(buf[0])) {
145 if (!inet_aton(buf, &saddr->sin_addr))
148 if ((he = gethostbyname(buf)) == NULL)
150 saddr->sin_addr = *(struct in_addr *)he->h_addr;
153 port = strtol(p, (char **)&r, 0);
156 saddr->sin_port = htons(port);
160 char *qemu_mac_strdup_printf(const uint8_t *macaddr)
162 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
163 macaddr[0], macaddr[1], macaddr[2],
164 macaddr[3], macaddr[4], macaddr[5]);
167 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6])
169 snprintf(nc->info_str, sizeof(nc->info_str),
170 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
172 macaddr[0], macaddr[1], macaddr[2],
173 macaddr[3], macaddr[4], macaddr[5]);
176 static int mac_table[256] = {0};
178 static void qemu_macaddr_set_used(MACAddr *macaddr)
182 for (index = 0x56; index < 0xFF; index++) {
183 if (macaddr->a[5] == index) {
189 static void qemu_macaddr_set_free(MACAddr *macaddr)
192 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
194 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
197 for (index = 0x56; index < 0xFF; index++) {
198 if (macaddr->a[5] == index) {
204 static int qemu_macaddr_get_free(void)
208 for (index = 0x56; index < 0xFF; index++) {
209 if (mac_table[index] == 0) {
217 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
219 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
220 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
222 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) {
223 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
226 qemu_macaddr_set_used(macaddr);
231 macaddr->a[0] = 0x52;
232 macaddr->a[1] = 0x54;
233 macaddr->a[2] = 0x00;
234 macaddr->a[3] = 0x12;
235 macaddr->a[4] = 0x34;
236 macaddr->a[5] = qemu_macaddr_get_free();
237 qemu_macaddr_set_used(macaddr);
241 * Generate a name for net client
243 * Only net clients created with the legacy -net option and NICs need this.
245 static char *assign_name(NetClientState *nc1, const char *model)
250 QTAILQ_FOREACH(nc, &net_clients, next) {
254 if (strcmp(nc->model, model) == 0) {
259 return g_strdup_printf("%s.%d", model, id);
262 static void qemu_net_client_destructor(NetClientState *nc)
267 static void qemu_net_client_setup(NetClientState *nc,
269 NetClientState *peer,
272 NetClientDestructor *destructor)
275 nc->model = g_strdup(model);
277 nc->name = g_strdup(name);
279 nc->name = assign_name(nc, model);
287 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
289 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc);
290 nc->destructor = destructor;
291 QTAILQ_INIT(&nc->filters);
294 NetClientState *qemu_new_net_client(NetClientInfo *info,
295 NetClientState *peer,
301 assert(info->size >= sizeof(NetClientState));
303 nc = g_malloc0(info->size);
304 qemu_net_client_setup(nc, info, peer, model, name,
305 qemu_net_client_destructor);
310 NICState *qemu_new_nic(NetClientInfo *info,
316 NetClientState **peers = conf->peers.ncs;
318 int i, queues = MAX(1, conf->peers.queues);
320 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
321 assert(info->size >= sizeof(NICState));
323 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
324 nic->ncs = (void *)nic + info->size;
326 nic->opaque = opaque;
328 for (i = 0; i < queues; i++) {
329 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
331 nic->ncs[i].queue_index = i;
337 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
339 return nic->ncs + queue_index;
342 NetClientState *qemu_get_queue(NICState *nic)
344 return qemu_get_subqueue(nic, 0);
347 NICState *qemu_get_nic(NetClientState *nc)
349 NetClientState *nc0 = nc - nc->queue_index;
351 return (NICState *)((void *)nc0 - nc->info->size);
354 void *qemu_get_nic_opaque(NetClientState *nc)
356 NICState *nic = qemu_get_nic(nc);
361 static void qemu_cleanup_net_client(NetClientState *nc)
363 QTAILQ_REMOVE(&net_clients, nc, next);
365 if (nc->info->cleanup) {
366 nc->info->cleanup(nc);
370 static void qemu_free_net_client(NetClientState *nc)
372 if (nc->incoming_queue) {
373 qemu_del_net_queue(nc->incoming_queue);
376 nc->peer->peer = NULL;
380 if (nc->destructor) {
385 void qemu_del_net_client(NetClientState *nc)
387 NetClientState *ncs[MAX_QUEUE_NUM];
389 NetFilterState *nf, *next;
391 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
393 /* If the NetClientState belongs to a multiqueue backend, we will change all
394 * other NetClientStates also.
396 queues = qemu_find_net_clients_except(nc->name, ncs,
397 NET_CLIENT_OPTIONS_KIND_NIC,
401 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) {
402 object_unparent(OBJECT(nf));
405 /* If there is a peer NIC, delete and cleanup client, but do not free. */
406 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
407 NICState *nic = qemu_get_nic(nc->peer);
408 if (nic->peer_deleted) {
411 nic->peer_deleted = true;
413 for (i = 0; i < queues; i++) {
414 ncs[i]->peer->link_down = true;
417 if (nc->peer->info->link_status_changed) {
418 nc->peer->info->link_status_changed(nc->peer);
421 for (i = 0; i < queues; i++) {
422 qemu_cleanup_net_client(ncs[i]);
428 for (i = 0; i < queues; i++) {
429 qemu_cleanup_net_client(ncs[i]);
430 qemu_free_net_client(ncs[i]);
434 void qemu_del_nic(NICState *nic)
436 int i, queues = MAX(nic->conf->peers.queues, 1);
438 qemu_macaddr_set_free(&nic->conf->macaddr);
440 /* If this is a peer NIC and peer has already been deleted, free it now. */
441 if (nic->peer_deleted) {
442 for (i = 0; i < queues; i++) {
443 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
447 for (i = queues - 1; i >= 0; i--) {
448 NetClientState *nc = qemu_get_subqueue(nic, i);
450 qemu_cleanup_net_client(nc);
451 qemu_free_net_client(nc);
457 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
461 QTAILQ_FOREACH(nc, &net_clients, next) {
462 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
463 if (nc->queue_index == 0) {
464 func(qemu_get_nic(nc), opaque);
470 bool qemu_has_ufo(NetClientState *nc)
472 if (!nc || !nc->info->has_ufo) {
476 return nc->info->has_ufo(nc);
479 bool qemu_has_vnet_hdr(NetClientState *nc)
481 if (!nc || !nc->info->has_vnet_hdr) {
485 return nc->info->has_vnet_hdr(nc);
488 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
490 if (!nc || !nc->info->has_vnet_hdr_len) {
494 return nc->info->has_vnet_hdr_len(nc, len);
497 void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
499 if (!nc || !nc->info->using_vnet_hdr) {
503 nc->info->using_vnet_hdr(nc, enable);
506 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
509 if (!nc || !nc->info->set_offload) {
513 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
516 void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
518 if (!nc || !nc->info->set_vnet_hdr_len) {
522 nc->info->set_vnet_hdr_len(nc, len);
525 int qemu_set_vnet_le(NetClientState *nc, bool is_le)
527 if (!nc || !nc->info->set_vnet_le) {
531 return nc->info->set_vnet_le(nc, is_le);
534 int qemu_set_vnet_be(NetClientState *nc, bool is_be)
536 if (!nc || !nc->info->set_vnet_be) {
540 return nc->info->set_vnet_be(nc, is_be);
543 int qemu_can_send_packet(NetClientState *sender)
545 int vm_running = runstate_is_running();
555 if (sender->peer->receive_disabled) {
557 } else if (sender->peer->info->can_receive &&
558 !sender->peer->info->can_receive(sender->peer)) {
564 static ssize_t filter_receive_iov(NetClientState *nc,
565 NetFilterDirection direction,
566 NetClientState *sender,
568 const struct iovec *iov,
570 NetPacketSent *sent_cb)
573 NetFilterState *nf = NULL;
575 QTAILQ_FOREACH(nf, &nc->filters, next) {
576 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
586 static ssize_t filter_receive(NetClientState *nc,
587 NetFilterDirection direction,
588 NetClientState *sender,
592 NetPacketSent *sent_cb)
595 .iov_base = (void *)data,
599 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb);
602 void qemu_purge_queued_packets(NetClientState *nc)
608 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
612 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge)
614 nc->receive_disabled = 0;
616 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
617 if (net_hub_flush(nc->peer)) {
621 if (qemu_net_queue_flush(nc->incoming_queue)) {
622 /* We emptied the queue successfully, signal to the IO thread to repoll
623 * the file descriptor (for tap, for example).
627 /* Unable to empty the queue, purge remaining packets */
628 qemu_net_queue_purge(nc->incoming_queue, nc);
632 void qemu_flush_queued_packets(NetClientState *nc)
634 qemu_flush_or_purge_queued_packets(nc, false);
637 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
639 const uint8_t *buf, int size,
640 NetPacketSent *sent_cb)
646 printf("qemu_send_packet_async:\n");
647 hex_dump(stdout, buf, size);
650 if (sender->link_down || !sender->peer) {
654 /* Let filters handle the packet first */
655 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX,
656 sender, flags, buf, size, sent_cb);
661 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX,
662 sender, flags, buf, size, sent_cb);
667 queue = sender->peer->incoming_queue;
669 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
672 ssize_t qemu_send_packet_async(NetClientState *sender,
673 const uint8_t *buf, int size,
674 NetPacketSent *sent_cb)
676 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
680 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
682 qemu_send_packet_async(nc, buf, size, NULL);
685 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
687 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
691 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
692 int iovcnt, unsigned flags)
694 uint8_t buf[NET_BUFSIZE];
699 buffer = iov[0].iov_base;
700 offset = iov[0].iov_len;
703 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
706 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
707 return nc->info->receive_raw(nc, buffer, offset);
709 return nc->info->receive(nc, buffer, offset);
713 ssize_t qemu_deliver_packet_iov(NetClientState *sender,
715 const struct iovec *iov,
719 NetClientState *nc = opaque;
723 return iov_size(iov, iovcnt);
726 if (nc->receive_disabled) {
730 if (nc->info->receive_iov) {
731 ret = nc->info->receive_iov(nc, iov, iovcnt);
733 ret = nc_sendv_compat(nc, iov, iovcnt, flags);
737 nc->receive_disabled = 1;
743 ssize_t qemu_sendv_packet_async(NetClientState *sender,
744 const struct iovec *iov, int iovcnt,
745 NetPacketSent *sent_cb)
750 if (sender->link_down || !sender->peer) {
751 return iov_size(iov, iovcnt);
754 /* Let filters handle the packet first */
755 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender,
756 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb);
761 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender,
762 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb);
767 queue = sender->peer->incoming_queue;
769 return qemu_net_queue_send_iov(queue, sender,
770 QEMU_NET_PACKET_FLAG_NONE,
771 iov, iovcnt, sent_cb);
775 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
777 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
780 NetClientState *qemu_find_netdev(const char *id)
784 QTAILQ_FOREACH(nc, &net_clients, next) {
785 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
787 if (!strcmp(nc->name, id)) {
795 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
796 NetClientOptionsKind type, int max)
801 QTAILQ_FOREACH(nc, &net_clients, next) {
802 if (nc->info->type == type) {
805 if (!id || !strcmp(nc->name, id)) {
816 static int nic_get_free_idx(void)
820 for (index = 0; index < MAX_NICS; index++)
821 if (!nd_table[index].used)
826 int qemu_show_nic_models(const char *arg, const char *const *models)
830 if (!arg || !is_help_option(arg)) {
834 fprintf(stderr, "qemu: Supported NIC models: ");
835 for (i = 0 ; models[i]; i++)
836 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
840 void qemu_check_nic_model(NICInfo *nd, const char *model)
842 const char *models[2];
847 if (qemu_show_nic_models(nd->model, models))
849 if (qemu_find_nic_model(nd, models, model) < 0)
853 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
854 const char *default_model)
859 nd->model = g_strdup(default_model);
861 for (i = 0 ; models[i]; i++) {
862 if (strcmp(nd->model, models[i]) == 0)
866 error_report("Unsupported NIC model: %s", nd->model);
870 static int net_init_nic(const NetClientOptions *opts, const char *name,
871 NetClientState *peer, Error **errp)
875 const NetLegacyNicOptions *nic;
877 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
880 idx = nic_get_free_idx();
881 if (idx == -1 || nb_nics >= MAX_NICS) {
882 error_setg(errp, "too many NICs");
888 memset(nd, 0, sizeof(*nd));
890 if (nic->has_netdev) {
891 nd->netdev = qemu_find_netdev(nic->netdev);
893 error_setg(errp, "netdev '%s' not found", nic->netdev);
900 nd->name = g_strdup(name);
901 if (nic->has_model) {
902 nd->model = g_strdup(nic->model);
905 nd->devaddr = g_strdup(nic->addr);
908 if (nic->has_macaddr &&
909 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
910 error_setg(errp, "invalid syntax for ethernet address");
913 if (nic->has_macaddr &&
914 is_multicast_ether_addr(nd->macaddr.a)) {
916 "NIC cannot have multicast MAC address (odd 1st byte)");
919 qemu_macaddr_default_if_unset(&nd->macaddr);
921 if (nic->has_vectors) {
922 if (nic->vectors > 0x7ffffff) {
923 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors);
926 nd->nvectors = nic->vectors;
928 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
938 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
939 const NetClientOptions *opts,
941 NetClientState *peer, Error **errp) = {
942 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
944 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
946 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
947 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
949 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
952 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap,
954 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
955 #ifdef CONFIG_NET_BRIDGE
956 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
958 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
959 #ifdef CONFIG_VHOST_NET_USED
960 [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user,
963 [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3,
968 static int net_client_init1(const void *object, int is_netdev, Error **errp)
970 const NetClientOptions *opts;
972 NetClientState *peer = NULL;
975 const Netdev *netdev = object;
979 if (opts->kind == NET_CLIENT_OPTIONS_KIND_DUMP ||
980 opts->kind == NET_CLIENT_OPTIONS_KIND_NIC ||
981 !net_client_init_fun[opts->kind]) {
982 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
983 "a netdev backend type");
987 const NetLegacy *net = object;
989 /* missing optional values have been initialized to "all bits zero" */
990 name = net->has_id ? net->id : net->name;
992 if (opts->kind == NET_CLIENT_OPTIONS_KIND_NONE) {
993 return 0; /* nothing to do */
995 if (opts->kind == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
996 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
1001 if (!net_client_init_fun[opts->kind]) {
1002 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
1003 "a net backend type (maybe it is not compiled "
1004 "into this binary)");
1008 /* Do not add to a vlan if it's a nic with a netdev= parameter. */
1009 if (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
1010 !opts->nic->has_netdev) {
1011 peer = net_hub_add_port(net->has_vlan ? net->vlan : 0, NULL);
1015 if (net_client_init_fun[opts->kind](opts, name, peer, errp) < 0) {
1016 /* FIXME drop when all init functions store an Error */
1017 if (errp && !*errp) {
1018 error_setg(errp, QERR_DEVICE_INIT_FAILED,
1019 NetClientOptionsKind_lookup[opts->kind]);
1027 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
1030 visit_type_Netdev(v, (Netdev **)object, NULL, errp);
1032 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
1037 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
1039 void *object = NULL;
1044 OptsVisitor *ov = opts_visitor_new(opts);
1046 net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
1047 opts_visitor_cleanup(ov);
1051 ret = net_client_init1(object, is_netdev, &err);
1055 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
1057 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
1058 qapi_dealloc_visitor_cleanup(dv);
1061 error_propagate(errp, err);
1066 static int net_host_check_device(const char *device)
1069 for (i = 0; host_net_devices[i]; i++) {
1070 if (!strncmp(host_net_devices[i], device,
1071 strlen(host_net_devices[i]))) {
1079 void hmp_host_net_add(Monitor *mon, const QDict *qdict)
1081 const char *device = qdict_get_str(qdict, "device");
1082 const char *opts_str = qdict_get_try_str(qdict, "opts");
1083 Error *local_err = NULL;
1086 if (!net_host_check_device(device)) {
1087 monitor_printf(mon, "invalid host network device %s\n", device);
1091 opts = qemu_opts_parse_noisily(qemu_find_opts("net"),
1092 opts_str ? opts_str : "", false);
1097 qemu_opt_set(opts, "type", device, &error_abort);
1099 net_client_init(opts, 0, &local_err);
1101 error_report_err(local_err);
1102 monitor_printf(mon, "adding host network device %s failed\n", device);
1106 void hmp_host_net_remove(Monitor *mon, const QDict *qdict)
1109 int vlan_id = qdict_get_int(qdict, "vlan_id");
1110 const char *device = qdict_get_str(qdict, "device");
1112 nc = net_hub_find_client_by_name(vlan_id, device);
1114 error_report("Host network device '%s' on hub '%d' not found",
1118 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1119 error_report("invalid host network device '%s'", device);
1123 qemu_del_net_client(nc->peer);
1124 qemu_del_net_client(nc);
1127 void netdev_add(QemuOpts *opts, Error **errp)
1129 net_client_init(opts, 1, errp);
1132 void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp)
1134 Error *local_err = NULL;
1135 QemuOptsList *opts_list;
1138 opts_list = qemu_find_opts_err("netdev", &local_err);
1143 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
1148 netdev_add(opts, &local_err);
1150 qemu_opts_del(opts);
1155 error_propagate(errp, local_err);
1158 void qmp_netdev_del(const char *id, Error **errp)
1163 nc = qemu_find_netdev(id);
1165 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1166 "Device '%s' not found", id);
1170 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
1172 error_setg(errp, "Device '%s' is not a netdev", id);
1176 qemu_del_net_client(nc);
1177 qemu_opts_del(opts);
1180 void print_net_client(Monitor *mon, NetClientState *nc)
1184 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
1186 NetClientOptionsKind_lookup[nc->info->type],
1188 if (!QTAILQ_EMPTY(&nc->filters)) {
1189 monitor_printf(mon, "filters:\n");
1191 QTAILQ_FOREACH(nf, &nc->filters, next) {
1192 monitor_printf(mon, " - %s: type=%s%s\n",
1193 object_get_canonical_path_component(OBJECT(nf)),
1194 object_get_typename(OBJECT(nf)),
1199 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
1203 RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
1205 QTAILQ_FOREACH(nc, &net_clients, next) {
1206 RxFilterInfoList *entry;
1209 if (has_name && strcmp(nc->name, name) != 0) {
1213 /* only query rx-filter information of NIC */
1214 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) {
1216 error_setg(errp, "net client(%s) isn't a NIC", name);
1222 if (nc->info->query_rx_filter) {
1223 info = nc->info->query_rx_filter(nc);
1224 entry = g_malloc0(sizeof(*entry));
1225 entry->value = info;
1228 filter_list = entry;
1230 last_entry->next = entry;
1233 } else if (has_name) {
1234 error_setg(errp, "net client(%s) doesn't support"
1235 " rx-filter querying", name);
1244 if (filter_list == NULL && has_name) {
1245 error_setg(errp, "invalid net client name: %s", name);
1251 void hmp_info_network(Monitor *mon, const QDict *qdict)
1253 NetClientState *nc, *peer;
1254 NetClientOptionsKind type;
1258 QTAILQ_FOREACH(nc, &net_clients, next) {
1260 type = nc->info->type;
1262 /* Skip if already printed in hub info */
1263 if (net_hub_id_for_client(nc, NULL) == 0) {
1267 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
1268 print_net_client(mon, nc);
1269 } /* else it's a netdev connected to a NIC, printed with the NIC */
1270 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
1271 monitor_printf(mon, " \\ ");
1272 print_net_client(mon, peer);
1277 void qmp_set_link(const char *name, bool up, Error **errp)
1279 NetClientState *ncs[MAX_QUEUE_NUM];
1283 queues = qemu_find_net_clients_except(name, ncs,
1284 NET_CLIENT_OPTIONS_KIND_MAX,
1288 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1289 "Device '%s' not found", name);
1294 for (i = 0; i < queues; i++) {
1295 ncs[i]->link_down = !up;
1298 if (nc->info->link_status_changed) {
1299 nc->info->link_status_changed(nc);
1303 /* Change peer link only if the peer is NIC and then notify peer.
1304 * If the peer is a HUBPORT or a backend, we do not change the
1307 * This behavior is compatible with qemu vlans where there could be
1308 * multiple clients that can still communicate with each other in
1309 * disconnected mode. For now maintain this compatibility.
1311 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1312 for (i = 0; i < queues; i++) {
1313 ncs[i]->peer->link_down = !up;
1316 if (nc->peer->info->link_status_changed) {
1317 nc->peer->info->link_status_changed(nc->peer);
1322 static void net_vm_change_state_handler(void *opaque, int running,
1326 NetClientState *tmp;
1328 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
1330 /* Flush queued packets and wake up backends. */
1331 if (nc->peer && qemu_can_send_packet(nc)) {
1332 qemu_flush_queued_packets(nc->peer);
1335 /* Complete all queued packets, to guarantee we don't modify
1336 * state later when VM is not running.
1338 qemu_flush_or_purge_queued_packets(nc, true);
1343 void net_cleanup(void)
1347 /* We may del multiple entries during qemu_del_net_client(),
1348 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1350 while (!QTAILQ_EMPTY(&net_clients)) {
1351 nc = QTAILQ_FIRST(&net_clients);
1352 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1353 qemu_del_nic(qemu_get_nic(nc));
1355 qemu_del_net_client(nc);
1359 qemu_del_vm_change_state_handler(net_change_state_entry);
1362 void net_check_clients(void)
1367 /* Don't warn about the default network setup that you get if
1368 * no command line -net or -netdev options are specified. There
1369 * are two cases that we would otherwise complain about:
1370 * (1) board doesn't support a NIC but the implicit "-net nic"
1372 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
1373 * sets up a nic that isn't connected to anything.
1379 net_hub_check_clients();
1381 QTAILQ_FOREACH(nc, &net_clients, next) {
1383 fprintf(stderr, "Warning: %s %s has no peer\n",
1384 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
1385 "nic" : "netdev", nc->name);
1389 /* Check that all NICs requested via -net nic actually got created.
1390 * NICs created via -device don't need to be checked here because
1391 * they are always instantiated.
1393 for (i = 0; i < MAX_NICS; i++) {
1394 NICInfo *nd = &nd_table[i];
1395 if (nd->used && !nd->instantiated) {
1396 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1397 "was not created (not supported by this machine?)\n",
1398 nd->name ? nd->name : "anonymous",
1399 nd->model ? nd->model : "unspecified");
1404 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp)
1406 Error *local_err = NULL;
1408 net_client_init(opts, 0, &local_err);
1410 error_report_err(local_err);
1417 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp)
1419 Error *local_err = NULL;
1422 ret = net_client_init(opts, 1, &local_err);
1424 error_report_err(local_err);
1431 int net_init_clients(void)
1433 QemuOptsList *net = qemu_find_opts("net");
1436 /* if no clients, we use a default config */
1437 qemu_opts_set(net, NULL, "type", "nic", &error_abort);
1439 qemu_opts_set(net, NULL, "type", "user", &error_abort);
1443 net_change_state_entry =
1444 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
1446 QTAILQ_INIT(&net_clients);
1448 if (qemu_opts_foreach(qemu_find_opts("netdev"),
1449 net_init_netdev, NULL, NULL)) {
1453 if (qemu_opts_foreach(net, net_init_client, NULL, NULL)) {
1460 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1462 #if defined(CONFIG_SLIRP)
1464 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1469 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) {
1479 unsigned compute_mcast_idx(const uint8_t *ep)
1486 for (i = 0; i < 6; i++) {
1488 for (j = 0; j < 8; j++) {
1489 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1493 crc = ((crc ^ POLYNOMIAL) | carry);
1500 QemuOptsList qemu_netdev_opts = {
1502 .implied_opt_name = "type",
1503 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1506 * no elements => accept any params
1507 * validation will happen later
1509 { /* end of list */ }
1513 QemuOptsList qemu_net_opts = {
1515 .implied_opt_name = "type",
1516 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1519 * no elements => accept any params
1520 * validation will happen later
1522 { /* end of list */ }