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 "qemu/osdep.h"
29 #include "net/slirp.h"
33 #include "monitor/monitor.h"
34 #include "qemu-common.h"
35 #include "qemu/help_option.h"
36 #include "qapi/qmp/qerror.h"
37 #include "qemu/error-report.h"
38 #include "qemu/sockets.h"
39 #include "qemu/cutils.h"
40 #include "qemu/config-file.h"
41 #include "qmp-commands.h"
44 #include "qemu/main-loop.h"
45 #include "qapi-visit.h"
46 #include "qapi/opts-visitor.h"
47 #include "sysemu/sysemu.h"
48 #include "net/filter.h"
49 #include "qapi/string-output-visitor.h"
51 /* Net bridge is currently not supported for W32. */
53 # define CONFIG_NET_BRIDGE
56 static VMChangeStateEntry *net_change_state_entry;
57 static QTAILQ_HEAD(, NetClientState) net_clients;
59 const char *host_net_devices[] = {
63 #ifdef CONFIG_NET_BRIDGE
79 /***********************************************************/
80 /* network device redirectors */
82 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
93 if (len > buf_size - 1)
102 int parse_host_port(struct sockaddr_in *saddr, const char *str)
110 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
112 saddr->sin_family = AF_INET;
113 if (buf[0] == '\0') {
114 saddr->sin_addr.s_addr = 0;
116 if (qemu_isdigit(buf[0])) {
117 if (!inet_aton(buf, &saddr->sin_addr))
120 if ((he = gethostbyname(buf)) == NULL)
122 saddr->sin_addr = *(struct in_addr *)he->h_addr;
125 port = strtol(p, (char **)&r, 0);
128 saddr->sin_port = htons(port);
132 char *qemu_mac_strdup_printf(const uint8_t *macaddr)
134 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
135 macaddr[0], macaddr[1], macaddr[2],
136 macaddr[3], macaddr[4], macaddr[5]);
139 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6])
141 snprintf(nc->info_str, sizeof(nc->info_str),
142 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
144 macaddr[0], macaddr[1], macaddr[2],
145 macaddr[3], macaddr[4], macaddr[5]);
148 static int mac_table[256] = {0};
150 static void qemu_macaddr_set_used(MACAddr *macaddr)
154 for (index = 0x56; index < 0xFF; index++) {
155 if (macaddr->a[5] == index) {
161 static void qemu_macaddr_set_free(MACAddr *macaddr)
164 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
166 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
169 for (index = 0x56; index < 0xFF; index++) {
170 if (macaddr->a[5] == index) {
176 static int qemu_macaddr_get_free(void)
180 for (index = 0x56; index < 0xFF; index++) {
181 if (mac_table[index] == 0) {
189 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
191 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
192 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
194 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) {
195 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
198 qemu_macaddr_set_used(macaddr);
203 macaddr->a[0] = 0x52;
204 macaddr->a[1] = 0x54;
205 macaddr->a[2] = 0x00;
206 macaddr->a[3] = 0x12;
207 macaddr->a[4] = 0x34;
208 macaddr->a[5] = qemu_macaddr_get_free();
209 qemu_macaddr_set_used(macaddr);
213 * Generate a name for net client
215 * Only net clients created with the legacy -net option and NICs need this.
217 static char *assign_name(NetClientState *nc1, const char *model)
222 QTAILQ_FOREACH(nc, &net_clients, next) {
226 if (strcmp(nc->model, model) == 0) {
231 return g_strdup_printf("%s.%d", model, id);
234 static void qemu_net_client_destructor(NetClientState *nc)
239 static void qemu_net_client_setup(NetClientState *nc,
241 NetClientState *peer,
244 NetClientDestructor *destructor)
247 nc->model = g_strdup(model);
249 nc->name = g_strdup(name);
251 nc->name = assign_name(nc, model);
259 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
261 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc);
262 nc->destructor = destructor;
263 QTAILQ_INIT(&nc->filters);
266 NetClientState *qemu_new_net_client(NetClientInfo *info,
267 NetClientState *peer,
273 assert(info->size >= sizeof(NetClientState));
275 nc = g_malloc0(info->size);
276 qemu_net_client_setup(nc, info, peer, model, name,
277 qemu_net_client_destructor);
282 NICState *qemu_new_nic(NetClientInfo *info,
288 NetClientState **peers = conf->peers.ncs;
290 int i, queues = MAX(1, conf->peers.queues);
292 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
293 assert(info->size >= sizeof(NICState));
295 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
296 nic->ncs = (void *)nic + info->size;
298 nic->opaque = opaque;
300 for (i = 0; i < queues; i++) {
301 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
303 nic->ncs[i].queue_index = i;
309 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
311 return nic->ncs + queue_index;
314 NetClientState *qemu_get_queue(NICState *nic)
316 return qemu_get_subqueue(nic, 0);
319 NICState *qemu_get_nic(NetClientState *nc)
321 NetClientState *nc0 = nc - nc->queue_index;
323 return (NICState *)((void *)nc0 - nc->info->size);
326 void *qemu_get_nic_opaque(NetClientState *nc)
328 NICState *nic = qemu_get_nic(nc);
333 static void qemu_cleanup_net_client(NetClientState *nc)
335 QTAILQ_REMOVE(&net_clients, nc, next);
337 if (nc->info->cleanup) {
338 nc->info->cleanup(nc);
342 static void qemu_free_net_client(NetClientState *nc)
344 if (nc->incoming_queue) {
345 qemu_del_net_queue(nc->incoming_queue);
348 nc->peer->peer = NULL;
352 if (nc->destructor) {
357 void qemu_del_net_client(NetClientState *nc)
359 NetClientState *ncs[MAX_QUEUE_NUM];
361 NetFilterState *nf, *next;
363 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
365 /* If the NetClientState belongs to a multiqueue backend, we will change all
366 * other NetClientStates also.
368 queues = qemu_find_net_clients_except(nc->name, ncs,
369 NET_CLIENT_OPTIONS_KIND_NIC,
373 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) {
374 object_unparent(OBJECT(nf));
377 /* If there is a peer NIC, delete and cleanup client, but do not free. */
378 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
379 NICState *nic = qemu_get_nic(nc->peer);
380 if (nic->peer_deleted) {
383 nic->peer_deleted = true;
385 for (i = 0; i < queues; i++) {
386 ncs[i]->peer->link_down = true;
389 if (nc->peer->info->link_status_changed) {
390 nc->peer->info->link_status_changed(nc->peer);
393 for (i = 0; i < queues; i++) {
394 qemu_cleanup_net_client(ncs[i]);
400 for (i = 0; i < queues; i++) {
401 qemu_cleanup_net_client(ncs[i]);
402 qemu_free_net_client(ncs[i]);
406 void qemu_del_nic(NICState *nic)
408 int i, queues = MAX(nic->conf->peers.queues, 1);
410 qemu_macaddr_set_free(&nic->conf->macaddr);
412 /* If this is a peer NIC and peer has already been deleted, free it now. */
413 if (nic->peer_deleted) {
414 for (i = 0; i < queues; i++) {
415 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
419 for (i = queues - 1; i >= 0; i--) {
420 NetClientState *nc = qemu_get_subqueue(nic, i);
422 qemu_cleanup_net_client(nc);
423 qemu_free_net_client(nc);
429 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
433 QTAILQ_FOREACH(nc, &net_clients, next) {
434 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
435 if (nc->queue_index == 0) {
436 func(qemu_get_nic(nc), opaque);
442 bool qemu_has_ufo(NetClientState *nc)
444 if (!nc || !nc->info->has_ufo) {
448 return nc->info->has_ufo(nc);
451 bool qemu_has_vnet_hdr(NetClientState *nc)
453 if (!nc || !nc->info->has_vnet_hdr) {
457 return nc->info->has_vnet_hdr(nc);
460 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
462 if (!nc || !nc->info->has_vnet_hdr_len) {
466 return nc->info->has_vnet_hdr_len(nc, len);
469 void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
471 if (!nc || !nc->info->using_vnet_hdr) {
475 nc->info->using_vnet_hdr(nc, enable);
478 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
481 if (!nc || !nc->info->set_offload) {
485 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
488 void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
490 if (!nc || !nc->info->set_vnet_hdr_len) {
494 nc->info->set_vnet_hdr_len(nc, len);
497 int qemu_set_vnet_le(NetClientState *nc, bool is_le)
499 #ifdef HOST_WORDS_BIGENDIAN
500 if (!nc || !nc->info->set_vnet_le) {
504 return nc->info->set_vnet_le(nc, is_le);
510 int qemu_set_vnet_be(NetClientState *nc, bool is_be)
512 #ifdef HOST_WORDS_BIGENDIAN
515 if (!nc || !nc->info->set_vnet_be) {
519 return nc->info->set_vnet_be(nc, is_be);
523 int qemu_can_send_packet(NetClientState *sender)
525 int vm_running = runstate_is_running();
535 if (sender->peer->receive_disabled) {
537 } else if (sender->peer->info->can_receive &&
538 !sender->peer->info->can_receive(sender->peer)) {
544 static ssize_t filter_receive_iov(NetClientState *nc,
545 NetFilterDirection direction,
546 NetClientState *sender,
548 const struct iovec *iov,
550 NetPacketSent *sent_cb)
553 NetFilterState *nf = NULL;
555 if (direction == NET_FILTER_DIRECTION_TX) {
556 QTAILQ_FOREACH(nf, &nc->filters, next) {
557 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
564 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, NetFilterHead, next) {
565 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
576 static ssize_t filter_receive(NetClientState *nc,
577 NetFilterDirection direction,
578 NetClientState *sender,
582 NetPacketSent *sent_cb)
585 .iov_base = (void *)data,
589 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb);
592 void qemu_purge_queued_packets(NetClientState *nc)
598 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
602 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge)
604 nc->receive_disabled = 0;
606 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
607 if (net_hub_flush(nc->peer)) {
611 if (qemu_net_queue_flush(nc->incoming_queue)) {
612 /* We emptied the queue successfully, signal to the IO thread to repoll
613 * the file descriptor (for tap, for example).
617 /* Unable to empty the queue, purge remaining packets */
618 qemu_net_queue_purge(nc->incoming_queue, nc);
622 void qemu_flush_queued_packets(NetClientState *nc)
624 qemu_flush_or_purge_queued_packets(nc, false);
627 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
629 const uint8_t *buf, int size,
630 NetPacketSent *sent_cb)
636 printf("qemu_send_packet_async:\n");
637 qemu_hexdump((const char *)buf, stdout, "net", size);
640 if (sender->link_down || !sender->peer) {
644 /* Let filters handle the packet first */
645 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX,
646 sender, flags, buf, size, sent_cb);
651 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX,
652 sender, flags, buf, size, sent_cb);
657 queue = sender->peer->incoming_queue;
659 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
662 ssize_t qemu_send_packet_async(NetClientState *sender,
663 const uint8_t *buf, int size,
664 NetPacketSent *sent_cb)
666 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
670 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
672 qemu_send_packet_async(nc, buf, size, NULL);
675 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
677 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
681 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
682 int iovcnt, unsigned flags)
690 buffer = iov[0].iov_base;
691 offset = iov[0].iov_len;
693 buf = g_new(uint8_t, NET_BUFSIZE);
695 offset = iov_to_buf(iov, iovcnt, 0, buf, NET_BUFSIZE);
698 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
699 ret = nc->info->receive_raw(nc, buffer, offset);
701 ret = nc->info->receive(nc, buffer, offset);
708 ssize_t qemu_deliver_packet_iov(NetClientState *sender,
710 const struct iovec *iov,
714 NetClientState *nc = opaque;
718 return iov_size(iov, iovcnt);
721 if (nc->receive_disabled) {
725 if (nc->info->receive_iov && !(flags & QEMU_NET_PACKET_FLAG_RAW)) {
726 ret = nc->info->receive_iov(nc, iov, iovcnt);
728 ret = nc_sendv_compat(nc, iov, iovcnt, flags);
732 nc->receive_disabled = 1;
738 ssize_t qemu_sendv_packet_async(NetClientState *sender,
739 const struct iovec *iov, int iovcnt,
740 NetPacketSent *sent_cb)
745 if (sender->link_down || !sender->peer) {
746 return iov_size(iov, iovcnt);
749 /* Let filters handle the packet first */
750 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender,
751 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb);
756 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender,
757 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb);
762 queue = sender->peer->incoming_queue;
764 return qemu_net_queue_send_iov(queue, sender,
765 QEMU_NET_PACKET_FLAG_NONE,
766 iov, iovcnt, sent_cb);
770 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
772 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
775 NetClientState *qemu_find_netdev(const char *id)
779 QTAILQ_FOREACH(nc, &net_clients, next) {
780 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
782 if (!strcmp(nc->name, id)) {
790 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
791 NetClientOptionsKind type, int max)
796 QTAILQ_FOREACH(nc, &net_clients, next) {
797 if (nc->info->type == type) {
800 if (!id || !strcmp(nc->name, id)) {
811 static int nic_get_free_idx(void)
815 for (index = 0; index < MAX_NICS; index++)
816 if (!nd_table[index].used)
821 int qemu_show_nic_models(const char *arg, const char *const *models)
825 if (!arg || !is_help_option(arg)) {
829 fprintf(stderr, "qemu: Supported NIC models: ");
830 for (i = 0 ; models[i]; i++)
831 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
835 void qemu_check_nic_model(NICInfo *nd, const char *model)
837 const char *models[2];
842 if (qemu_show_nic_models(nd->model, models))
844 if (qemu_find_nic_model(nd, models, model) < 0)
848 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
849 const char *default_model)
854 nd->model = g_strdup(default_model);
856 for (i = 0 ; models[i]; i++) {
857 if (strcmp(nd->model, models[i]) == 0)
861 error_report("Unsupported NIC model: %s", nd->model);
865 static int net_init_nic(const NetClientOptions *opts, const char *name,
866 NetClientState *peer, Error **errp)
870 const NetLegacyNicOptions *nic;
872 assert(opts->type == NET_CLIENT_OPTIONS_KIND_NIC);
873 nic = opts->u.nic.data;
875 idx = nic_get_free_idx();
876 if (idx == -1 || nb_nics >= MAX_NICS) {
877 error_setg(errp, "too many NICs");
883 memset(nd, 0, sizeof(*nd));
885 if (nic->has_netdev) {
886 nd->netdev = qemu_find_netdev(nic->netdev);
888 error_setg(errp, "netdev '%s' not found", nic->netdev);
895 nd->name = g_strdup(name);
896 if (nic->has_model) {
897 nd->model = g_strdup(nic->model);
900 nd->devaddr = g_strdup(nic->addr);
903 if (nic->has_macaddr &&
904 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
905 error_setg(errp, "invalid syntax for ethernet address");
908 if (nic->has_macaddr &&
909 is_multicast_ether_addr(nd->macaddr.a)) {
911 "NIC cannot have multicast MAC address (odd 1st byte)");
914 qemu_macaddr_default_if_unset(&nd->macaddr);
916 if (nic->has_vectors) {
917 if (nic->vectors > 0x7ffffff) {
918 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors);
921 nd->nvectors = nic->vectors;
923 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
933 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND__MAX])(
934 const NetClientOptions *opts,
936 NetClientState *peer, Error **errp) = {
937 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
939 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
941 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
942 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
944 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
947 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap,
949 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
950 #ifdef CONFIG_NET_BRIDGE
951 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
953 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
954 #ifdef CONFIG_VHOST_NET_USED
955 [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user,
958 [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3,
963 static int net_client_init1(const void *object, int is_netdev, Error **errp)
965 const NetClientOptions *opts;
967 NetClientState *peer = NULL;
970 const Netdev *netdev = object;
974 if (opts->type == NET_CLIENT_OPTIONS_KIND_DUMP ||
975 opts->type == NET_CLIENT_OPTIONS_KIND_NIC ||
976 !net_client_init_fun[opts->type]) {
977 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
978 "a netdev backend type");
982 const NetLegacy *net = object;
984 /* missing optional values have been initialized to "all bits zero" */
985 name = net->has_id ? net->id : net->name;
987 if (opts->type == NET_CLIENT_OPTIONS_KIND_NONE) {
988 return 0; /* nothing to do */
990 if (opts->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
991 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
996 if (!net_client_init_fun[opts->type]) {
997 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
998 "a net backend type (maybe it is not compiled "
999 "into this binary)");
1003 /* Do not add to a vlan if it's a nic with a netdev= parameter. */
1004 if (opts->type != NET_CLIENT_OPTIONS_KIND_NIC ||
1005 !opts->u.nic.data->has_netdev) {
1006 peer = net_hub_add_port(net->has_vlan ? net->vlan : 0, NULL);
1010 if (net_client_init_fun[opts->type](opts, name, peer, errp) < 0) {
1011 /* FIXME drop when all init functions store an Error */
1012 if (errp && !*errp) {
1013 error_setg(errp, QERR_DEVICE_INIT_FAILED,
1014 NetClientOptionsKind_lookup[opts->type]);
1022 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
1024 void *object = NULL;
1027 Visitor *v = opts_visitor_new(opts);
1030 /* Parse convenience option format ip6-net=fec0::0[/64] */
1031 const char *ip6_net = qemu_opt_get(opts, "ipv6-net");
1034 char buf[strlen(ip6_net) + 1];
1036 if (get_str_sep(buf, sizeof(buf), &ip6_net, '/') < 0) {
1037 /* Default 64bit prefix length. */
1038 qemu_opt_set(opts, "ipv6-prefix", ip6_net, &error_abort);
1039 qemu_opt_set_number(opts, "ipv6-prefixlen", 64, &error_abort);
1041 /* User-specified prefix length. */
1045 qemu_opt_set(opts, "ipv6-prefix", buf, &error_abort);
1046 err = qemu_strtoul(ip6_net, NULL, 10, &len);
1049 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
1050 "ipv6-prefix", "a number");
1052 qemu_opt_set_number(opts, "ipv6-prefixlen", len,
1056 qemu_opt_unset(opts, "ipv6-net");
1061 visit_type_Netdev(v, NULL, (Netdev **)&object, &err);
1063 visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err);
1067 ret = net_client_init1(object, is_netdev, &err);
1071 qapi_free_Netdev(object);
1073 qapi_free_NetLegacy(object);
1076 error_propagate(errp, err);
1082 static int net_host_check_device(const char *device)
1085 for (i = 0; host_net_devices[i]; i++) {
1086 if (!strncmp(host_net_devices[i], device,
1087 strlen(host_net_devices[i]))) {
1095 void hmp_host_net_add(Monitor *mon, const QDict *qdict)
1097 const char *device = qdict_get_str(qdict, "device");
1098 const char *opts_str = qdict_get_try_str(qdict, "opts");
1099 Error *local_err = NULL;
1102 if (!net_host_check_device(device)) {
1103 monitor_printf(mon, "invalid host network device %s\n", device);
1107 opts = qemu_opts_parse_noisily(qemu_find_opts("net"),
1108 opts_str ? opts_str : "", false);
1113 qemu_opt_set(opts, "type", device, &error_abort);
1115 net_client_init(opts, 0, &local_err);
1117 error_report_err(local_err);
1118 monitor_printf(mon, "adding host network device %s failed\n", device);
1122 void hmp_host_net_remove(Monitor *mon, const QDict *qdict)
1125 int vlan_id = qdict_get_int(qdict, "vlan_id");
1126 const char *device = qdict_get_str(qdict, "device");
1128 nc = net_hub_find_client_by_name(vlan_id, device);
1130 error_report("Host network device '%s' on hub '%d' not found",
1134 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1135 error_report("invalid host network device '%s'", device);
1139 qemu_del_net_client(nc->peer);
1140 qemu_del_net_client(nc);
1143 void netdev_add(QemuOpts *opts, Error **errp)
1145 net_client_init(opts, 1, errp);
1148 void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp)
1150 Error *local_err = NULL;
1151 QemuOptsList *opts_list;
1154 opts_list = qemu_find_opts_err("netdev", &local_err);
1159 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
1164 netdev_add(opts, &local_err);
1166 qemu_opts_del(opts);
1171 error_propagate(errp, local_err);
1174 void qmp_netdev_del(const char *id, Error **errp)
1179 nc = qemu_find_netdev(id);
1181 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1182 "Device '%s' not found", id);
1186 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
1188 error_setg(errp, "Device '%s' is not a netdev", id);
1192 qemu_del_net_client(nc);
1193 qemu_opts_del(opts);
1196 static void netfilter_print_info(Monitor *mon, NetFilterState *nf)
1199 ObjectProperty *prop;
1200 ObjectPropertyIterator iter;
1201 StringOutputVisitor *ov;
1203 /* generate info str */
1204 object_property_iter_init(&iter, OBJECT(nf));
1205 while ((prop = object_property_iter_next(&iter))) {
1206 if (!strcmp(prop->name, "type")) {
1209 ov = string_output_visitor_new(false);
1210 object_property_get(OBJECT(nf), string_output_get_visitor(ov),
1212 str = string_output_get_string(ov);
1213 visit_free(string_output_get_visitor(ov));
1214 monitor_printf(mon, ",%s=%s", prop->name, str);
1217 monitor_printf(mon, "\n");
1220 void print_net_client(Monitor *mon, NetClientState *nc)
1224 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
1226 NetClientOptionsKind_lookup[nc->info->type],
1228 if (!QTAILQ_EMPTY(&nc->filters)) {
1229 monitor_printf(mon, "filters:\n");
1231 QTAILQ_FOREACH(nf, &nc->filters, next) {
1232 char *path = object_get_canonical_path_component(OBJECT(nf));
1234 monitor_printf(mon, " - %s: type=%s", path,
1235 object_get_typename(OBJECT(nf)));
1236 netfilter_print_info(mon, nf);
1241 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
1245 RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
1247 QTAILQ_FOREACH(nc, &net_clients, next) {
1248 RxFilterInfoList *entry;
1251 if (has_name && strcmp(nc->name, name) != 0) {
1255 /* only query rx-filter information of NIC */
1256 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) {
1258 error_setg(errp, "net client(%s) isn't a NIC", name);
1264 /* only query information on queue 0 since the info is per nic,
1267 if (nc->queue_index != 0)
1270 if (nc->info->query_rx_filter) {
1271 info = nc->info->query_rx_filter(nc);
1272 entry = g_malloc0(sizeof(*entry));
1273 entry->value = info;
1276 filter_list = entry;
1278 last_entry->next = entry;
1281 } else if (has_name) {
1282 error_setg(errp, "net client(%s) doesn't support"
1283 " rx-filter querying", name);
1292 if (filter_list == NULL && has_name) {
1293 error_setg(errp, "invalid net client name: %s", name);
1299 void hmp_info_network(Monitor *mon, const QDict *qdict)
1301 NetClientState *nc, *peer;
1302 NetClientOptionsKind type;
1306 QTAILQ_FOREACH(nc, &net_clients, next) {
1308 type = nc->info->type;
1310 /* Skip if already printed in hub info */
1311 if (net_hub_id_for_client(nc, NULL) == 0) {
1315 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
1316 print_net_client(mon, nc);
1317 } /* else it's a netdev connected to a NIC, printed with the NIC */
1318 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
1319 monitor_printf(mon, " \\ ");
1320 print_net_client(mon, peer);
1325 void qmp_set_link(const char *name, bool up, Error **errp)
1327 NetClientState *ncs[MAX_QUEUE_NUM];
1331 queues = qemu_find_net_clients_except(name, ncs,
1332 NET_CLIENT_OPTIONS_KIND__MAX,
1336 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1337 "Device '%s' not found", name);
1342 for (i = 0; i < queues; i++) {
1343 ncs[i]->link_down = !up;
1346 if (nc->info->link_status_changed) {
1347 nc->info->link_status_changed(nc);
1351 /* Change peer link only if the peer is NIC and then notify peer.
1352 * If the peer is a HUBPORT or a backend, we do not change the
1355 * This behavior is compatible with qemu vlans where there could be
1356 * multiple clients that can still communicate with each other in
1357 * disconnected mode. For now maintain this compatibility.
1359 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1360 for (i = 0; i < queues; i++) {
1361 ncs[i]->peer->link_down = !up;
1364 if (nc->peer->info->link_status_changed) {
1365 nc->peer->info->link_status_changed(nc->peer);
1370 static void net_vm_change_state_handler(void *opaque, int running,
1374 NetClientState *tmp;
1376 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
1378 /* Flush queued packets and wake up backends. */
1379 if (nc->peer && qemu_can_send_packet(nc)) {
1380 qemu_flush_queued_packets(nc->peer);
1383 /* Complete all queued packets, to guarantee we don't modify
1384 * state later when VM is not running.
1386 qemu_flush_or_purge_queued_packets(nc, true);
1391 void net_cleanup(void)
1395 /* We may del multiple entries during qemu_del_net_client(),
1396 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1398 while (!QTAILQ_EMPTY(&net_clients)) {
1399 nc = QTAILQ_FIRST(&net_clients);
1400 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1401 qemu_del_nic(qemu_get_nic(nc));
1403 qemu_del_net_client(nc);
1407 qemu_del_vm_change_state_handler(net_change_state_entry);
1410 void net_check_clients(void)
1415 net_hub_check_clients();
1417 QTAILQ_FOREACH(nc, &net_clients, next) {
1419 fprintf(stderr, "Warning: %s %s has no peer\n",
1420 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
1421 "nic" : "netdev", nc->name);
1425 /* Check that all NICs requested via -net nic actually got created.
1426 * NICs created via -device don't need to be checked here because
1427 * they are always instantiated.
1429 for (i = 0; i < MAX_NICS; i++) {
1430 NICInfo *nd = &nd_table[i];
1431 if (nd->used && !nd->instantiated) {
1432 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1433 "was not created (not supported by this machine?)\n",
1434 nd->name ? nd->name : "anonymous",
1435 nd->model ? nd->model : "unspecified");
1440 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp)
1442 Error *local_err = NULL;
1444 net_client_init(opts, 0, &local_err);
1446 error_report_err(local_err);
1453 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp)
1455 Error *local_err = NULL;
1458 ret = net_client_init(opts, 1, &local_err);
1460 error_report_err(local_err);
1467 int net_init_clients(void)
1469 QemuOptsList *net = qemu_find_opts("net");
1471 net_change_state_entry =
1472 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
1474 QTAILQ_INIT(&net_clients);
1476 if (qemu_opts_foreach(qemu_find_opts("netdev"),
1477 net_init_netdev, NULL, NULL)) {
1481 if (qemu_opts_foreach(net, net_init_client, NULL, NULL)) {
1488 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1490 #if defined(CONFIG_SLIRP)
1492 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1497 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) {
1506 unsigned compute_mcast_idx(const uint8_t *ep)
1513 for (i = 0; i < 6; i++) {
1515 for (j = 0; j < 8; j++) {
1516 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1520 crc = ((crc ^ POLYNOMIAL) | carry);
1527 QemuOptsList qemu_netdev_opts = {
1529 .implied_opt_name = "type",
1530 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1533 * no elements => accept any params
1534 * validation will happen later
1536 { /* end of list */ }
1540 QemuOptsList qemu_net_opts = {
1542 .implied_opt_name = "type",
1543 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1546 * no elements => accept any params
1547 * validation will happen later
1549 { /* end of list */ }
1553 void net_socket_rs_init(SocketReadState *rs,
1554 SocketReadStateFinalize *finalize)
1559 memset(rs->buf, 0, sizeof(rs->buf));
1560 rs->finalize = finalize;
1565 * 0: SocketReadState is not ready
1566 * 1: SocketReadState is ready
1567 * otherwise error occurs
1569 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size)
1574 /* reassemble a packet from the network */
1575 switch (rs->state) { /* 0 = getting length, 1 = getting data */
1581 memcpy(rs->buf + rs->index, buf, l);
1585 if (rs->index == 4) {
1587 rs->packet_len = ntohl(*(uint32_t *)rs->buf);
1593 l = rs->packet_len - rs->index;
1597 if (rs->index + l <= sizeof(rs->buf)) {
1598 memcpy(rs->buf + rs->index, buf, l);
1600 fprintf(stderr, "serious error: oversized packet received,"
1601 "connection terminated.\n");
1602 rs->index = rs->state = 0;
1609 if (rs->index >= rs->packet_len) {