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
25 #include "qemu/osdep.h"
30 #include "net/slirp.h"
34 #include "monitor/monitor.h"
35 #include "qemu/help_option.h"
36 #include "qapi/qapi-commands-net.h"
37 #include "qapi/qapi-visit-net.h"
38 #include "qapi/qmp/qdict.h"
39 #include "qapi/qmp/qerror.h"
40 #include "qemu/error-report.h"
41 #include "qemu/sockets.h"
42 #include "qemu/cutils.h"
43 #include "qemu/config-file.h"
46 #include "qemu/main-loop.h"
47 #include "qemu/option.h"
48 #include "qapi/error.h"
49 #include "qapi/opts-visitor.h"
50 #include "sysemu/sysemu.h"
51 #include "sysemu/qtest.h"
52 #include "net/filter.h"
53 #include "qapi/string-output-visitor.h"
55 /* Net bridge is currently not supported for W32. */
57 # define CONFIG_NET_BRIDGE
60 static VMChangeStateEntry *net_change_state_entry;
61 static QTAILQ_HEAD(, NetClientState) net_clients;
63 /***********************************************************/
64 /* network device redirectors */
66 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
77 if (len > buf_size - 1)
86 int parse_host_port(struct sockaddr_in *saddr, const char *str,
95 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
96 error_setg(errp, "host address '%s' doesn't contain ':' "
97 "separating host from port", str);
100 saddr->sin_family = AF_INET;
101 if (buf[0] == '\0') {
102 saddr->sin_addr.s_addr = 0;
104 if (qemu_isdigit(buf[0])) {
105 if (!inet_aton(buf, &saddr->sin_addr)) {
106 error_setg(errp, "host address '%s' is not a valid "
107 "IPv4 address", buf);
111 he = gethostbyname(buf);
113 error_setg(errp, "can't resolve host address '%s'", buf);
116 saddr->sin_addr = *(struct in_addr *)he->h_addr;
119 port = strtol(p, (char **)&r, 0);
121 error_setg(errp, "port number '%s' is invalid", p);
124 saddr->sin_port = htons(port);
128 char *qemu_mac_strdup_printf(const uint8_t *macaddr)
130 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
131 macaddr[0], macaddr[1], macaddr[2],
132 macaddr[3], macaddr[4], macaddr[5]);
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 static int mac_table[256] = {0};
146 static void qemu_macaddr_set_used(MACAddr *macaddr)
150 for (index = 0x56; index < 0xFF; index++) {
151 if (macaddr->a[5] == index) {
157 static void qemu_macaddr_set_free(MACAddr *macaddr)
160 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
162 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
165 for (index = 0x56; index < 0xFF; index++) {
166 if (macaddr->a[5] == index) {
172 static int qemu_macaddr_get_free(void)
176 for (index = 0x56; index < 0xFF; index++) {
177 if (mac_table[index] == 0) {
185 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
187 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
188 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
190 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) {
191 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
194 qemu_macaddr_set_used(macaddr);
199 macaddr->a[0] = 0x52;
200 macaddr->a[1] = 0x54;
201 macaddr->a[2] = 0x00;
202 macaddr->a[3] = 0x12;
203 macaddr->a[4] = 0x34;
204 macaddr->a[5] = qemu_macaddr_get_free();
205 qemu_macaddr_set_used(macaddr);
209 * Generate a name for net client
211 * Only net clients created with the legacy -net option and NICs need this.
213 static char *assign_name(NetClientState *nc1, const char *model)
218 QTAILQ_FOREACH(nc, &net_clients, next) {
222 if (strcmp(nc->model, model) == 0) {
227 return g_strdup_printf("%s.%d", model, id);
230 static void qemu_net_client_destructor(NetClientState *nc)
235 static void qemu_net_client_setup(NetClientState *nc,
237 NetClientState *peer,
240 NetClientDestructor *destructor)
243 nc->model = g_strdup(model);
245 nc->name = g_strdup(name);
247 nc->name = assign_name(nc, model);
255 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
257 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc);
258 nc->destructor = destructor;
259 QTAILQ_INIT(&nc->filters);
262 NetClientState *qemu_new_net_client(NetClientInfo *info,
263 NetClientState *peer,
269 assert(info->size >= sizeof(NetClientState));
271 nc = g_malloc0(info->size);
272 qemu_net_client_setup(nc, info, peer, model, name,
273 qemu_net_client_destructor);
278 NICState *qemu_new_nic(NetClientInfo *info,
284 NetClientState **peers = conf->peers.ncs;
286 int i, queues = MAX(1, conf->peers.queues);
288 assert(info->type == NET_CLIENT_DRIVER_NIC);
289 assert(info->size >= sizeof(NICState));
291 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
292 nic->ncs = (void *)nic + info->size;
294 nic->opaque = opaque;
296 for (i = 0; i < queues; i++) {
297 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
299 nic->ncs[i].queue_index = i;
305 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
307 return nic->ncs + queue_index;
310 NetClientState *qemu_get_queue(NICState *nic)
312 return qemu_get_subqueue(nic, 0);
315 NICState *qemu_get_nic(NetClientState *nc)
317 NetClientState *nc0 = nc - nc->queue_index;
319 return (NICState *)((void *)nc0 - nc->info->size);
322 void *qemu_get_nic_opaque(NetClientState *nc)
324 NICState *nic = qemu_get_nic(nc);
329 static void qemu_cleanup_net_client(NetClientState *nc)
331 QTAILQ_REMOVE(&net_clients, nc, next);
333 if (nc->info->cleanup) {
334 nc->info->cleanup(nc);
338 static void qemu_free_net_client(NetClientState *nc)
340 if (nc->incoming_queue) {
341 qemu_del_net_queue(nc->incoming_queue);
344 nc->peer->peer = NULL;
348 if (nc->destructor) {
353 void qemu_del_net_client(NetClientState *nc)
355 NetClientState *ncs[MAX_QUEUE_NUM];
357 NetFilterState *nf, *next;
359 assert(nc->info->type != NET_CLIENT_DRIVER_NIC);
361 /* If the NetClientState belongs to a multiqueue backend, we will change all
362 * other NetClientStates also.
364 queues = qemu_find_net_clients_except(nc->name, ncs,
365 NET_CLIENT_DRIVER_NIC,
369 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) {
370 object_unparent(OBJECT(nf));
373 /* If there is a peer NIC, delete and cleanup client, but do not free. */
374 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
375 NICState *nic = qemu_get_nic(nc->peer);
376 if (nic->peer_deleted) {
379 nic->peer_deleted = true;
381 for (i = 0; i < queues; i++) {
382 ncs[i]->peer->link_down = true;
385 if (nc->peer->info->link_status_changed) {
386 nc->peer->info->link_status_changed(nc->peer);
389 for (i = 0; i < queues; i++) {
390 qemu_cleanup_net_client(ncs[i]);
396 for (i = 0; i < queues; i++) {
397 qemu_cleanup_net_client(ncs[i]);
398 qemu_free_net_client(ncs[i]);
402 void qemu_del_nic(NICState *nic)
404 int i, queues = MAX(nic->conf->peers.queues, 1);
406 qemu_macaddr_set_free(&nic->conf->macaddr);
408 /* If this is a peer NIC and peer has already been deleted, free it now. */
409 if (nic->peer_deleted) {
410 for (i = 0; i < queues; i++) {
411 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
415 for (i = queues - 1; i >= 0; i--) {
416 NetClientState *nc = qemu_get_subqueue(nic, i);
418 qemu_cleanup_net_client(nc);
419 qemu_free_net_client(nc);
425 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
429 QTAILQ_FOREACH(nc, &net_clients, next) {
430 if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
431 if (nc->queue_index == 0) {
432 func(qemu_get_nic(nc), opaque);
438 bool qemu_has_ufo(NetClientState *nc)
440 if (!nc || !nc->info->has_ufo) {
444 return nc->info->has_ufo(nc);
447 bool qemu_has_vnet_hdr(NetClientState *nc)
449 if (!nc || !nc->info->has_vnet_hdr) {
453 return nc->info->has_vnet_hdr(nc);
456 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
458 if (!nc || !nc->info->has_vnet_hdr_len) {
462 return nc->info->has_vnet_hdr_len(nc, len);
465 void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
467 if (!nc || !nc->info->using_vnet_hdr) {
471 nc->info->using_vnet_hdr(nc, enable);
474 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
477 if (!nc || !nc->info->set_offload) {
481 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
484 void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
486 if (!nc || !nc->info->set_vnet_hdr_len) {
490 nc->vnet_hdr_len = len;
491 nc->info->set_vnet_hdr_len(nc, len);
494 int qemu_set_vnet_le(NetClientState *nc, bool is_le)
496 #ifdef HOST_WORDS_BIGENDIAN
497 if (!nc || !nc->info->set_vnet_le) {
501 return nc->info->set_vnet_le(nc, is_le);
507 int qemu_set_vnet_be(NetClientState *nc, bool is_be)
509 #ifdef HOST_WORDS_BIGENDIAN
512 if (!nc || !nc->info->set_vnet_be) {
516 return nc->info->set_vnet_be(nc, is_be);
520 int qemu_can_send_packet(NetClientState *sender)
522 int vm_running = runstate_is_running();
532 if (sender->peer->receive_disabled) {
534 } else if (sender->peer->info->can_receive &&
535 !sender->peer->info->can_receive(sender->peer)) {
541 static ssize_t filter_receive_iov(NetClientState *nc,
542 NetFilterDirection direction,
543 NetClientState *sender,
545 const struct iovec *iov,
547 NetPacketSent *sent_cb)
550 NetFilterState *nf = NULL;
552 if (direction == NET_FILTER_DIRECTION_TX) {
553 QTAILQ_FOREACH(nf, &nc->filters, next) {
554 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
561 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, NetFilterHead, next) {
562 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
573 static ssize_t filter_receive(NetClientState *nc,
574 NetFilterDirection direction,
575 NetClientState *sender,
579 NetPacketSent *sent_cb)
582 .iov_base = (void *)data,
586 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb);
589 void qemu_purge_queued_packets(NetClientState *nc)
595 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
598 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge)
600 nc->receive_disabled = 0;
602 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_HUBPORT) {
603 if (net_hub_flush(nc->peer)) {
607 if (qemu_net_queue_flush(nc->incoming_queue)) {
608 /* We emptied the queue successfully, signal to the IO thread to repoll
609 * the file descriptor (for tap, for example).
613 /* Unable to empty the queue, purge remaining packets */
614 qemu_net_queue_purge(nc->incoming_queue, nc);
618 void qemu_flush_queued_packets(NetClientState *nc)
620 qemu_flush_or_purge_queued_packets(nc, false);
623 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
625 const uint8_t *buf, int size,
626 NetPacketSent *sent_cb)
632 printf("qemu_send_packet_async:\n");
633 qemu_hexdump((const char *)buf, stdout, "net", size);
636 if (sender->link_down || !sender->peer) {
640 /* Let filters handle the packet first */
641 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX,
642 sender, flags, buf, size, sent_cb);
647 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX,
648 sender, flags, buf, size, sent_cb);
653 queue = sender->peer->incoming_queue;
655 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
658 ssize_t qemu_send_packet_async(NetClientState *sender,
659 const uint8_t *buf, int size,
660 NetPacketSent *sent_cb)
662 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
666 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
668 qemu_send_packet_async(nc, buf, size, NULL);
671 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
673 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
677 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
678 int iovcnt, unsigned flags)
686 buffer = iov[0].iov_base;
687 offset = iov[0].iov_len;
689 offset = iov_size(iov, iovcnt);
690 if (offset > NET_BUFSIZE) {
693 buf = g_malloc(offset);
695 offset = iov_to_buf(iov, iovcnt, 0, buf, offset);
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_DRIVER_NIC)
782 if (!strcmp(nc->name, id)) {
790 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
791 NetClientDriver 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 Netdev *netdev, const char *name,
866 NetClientState *peer, Error **errp)
870 const NetLegacyNicOptions *nic;
872 assert(netdev->type == NET_CLIENT_DRIVER_NIC);
873 nic = &netdev->u.nic;
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_DRIVER__MAX])(
934 const Netdev *netdev,
936 NetClientState *peer, Error **errp) = {
937 [NET_CLIENT_DRIVER_NIC] = net_init_nic,
939 [NET_CLIENT_DRIVER_USER] = net_init_slirp,
941 [NET_CLIENT_DRIVER_TAP] = net_init_tap,
942 [NET_CLIENT_DRIVER_SOCKET] = net_init_socket,
944 [NET_CLIENT_DRIVER_VDE] = net_init_vde,
947 [NET_CLIENT_DRIVER_NETMAP] = net_init_netmap,
949 #ifdef CONFIG_NET_BRIDGE
950 [NET_CLIENT_DRIVER_BRIDGE] = net_init_bridge,
952 [NET_CLIENT_DRIVER_HUBPORT] = net_init_hubport,
953 #ifdef CONFIG_VHOST_NET_USED
954 [NET_CLIENT_DRIVER_VHOST_USER] = net_init_vhost_user,
957 [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3,
962 static int net_client_init1(const void *object, bool is_netdev, Error **errp)
965 const Netdev *netdev;
967 NetClientState *peer = NULL;
973 if (netdev->type == NET_CLIENT_DRIVER_NIC ||
974 !net_client_init_fun[netdev->type]) {
975 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
976 "a netdev backend type");
980 const NetLegacy *net = object;
981 const NetLegacyOptions *opts = net->opts;
984 /* missing optional values have been initialized to "all bits zero" */
985 name = net->has_id ? net->id : net->name;
987 /* Map the old options to the new flat type */
988 switch (opts->type) {
989 case NET_LEGACY_OPTIONS_TYPE_NONE:
990 return 0; /* nothing to do */
991 case NET_LEGACY_OPTIONS_TYPE_NIC:
992 legacy.type = NET_CLIENT_DRIVER_NIC;
993 legacy.u.nic = opts->u.nic;
995 case NET_LEGACY_OPTIONS_TYPE_USER:
996 legacy.type = NET_CLIENT_DRIVER_USER;
997 legacy.u.user = opts->u.user;
999 case NET_LEGACY_OPTIONS_TYPE_TAP:
1000 legacy.type = NET_CLIENT_DRIVER_TAP;
1001 legacy.u.tap = opts->u.tap;
1003 case NET_LEGACY_OPTIONS_TYPE_L2TPV3:
1004 legacy.type = NET_CLIENT_DRIVER_L2TPV3;
1005 legacy.u.l2tpv3 = opts->u.l2tpv3;
1007 case NET_LEGACY_OPTIONS_TYPE_SOCKET:
1008 legacy.type = NET_CLIENT_DRIVER_SOCKET;
1009 legacy.u.socket = opts->u.socket;
1011 case NET_LEGACY_OPTIONS_TYPE_VDE:
1012 legacy.type = NET_CLIENT_DRIVER_VDE;
1013 legacy.u.vde = opts->u.vde;
1015 case NET_LEGACY_OPTIONS_TYPE_BRIDGE:
1016 legacy.type = NET_CLIENT_DRIVER_BRIDGE;
1017 legacy.u.bridge = opts->u.bridge;
1019 case NET_LEGACY_OPTIONS_TYPE_NETMAP:
1020 legacy.type = NET_CLIENT_DRIVER_NETMAP;
1021 legacy.u.netmap = opts->u.netmap;
1023 case NET_LEGACY_OPTIONS_TYPE_VHOST_USER:
1024 legacy.type = NET_CLIENT_DRIVER_VHOST_USER;
1025 legacy.u.vhost_user = opts->u.vhost_user;
1031 if (!net_client_init_fun[netdev->type]) {
1032 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
1033 "a net backend type (maybe it is not compiled "
1034 "into this binary)");
1038 /* Do not add to a hub if it's a nic with a netdev= parameter. */
1039 if (netdev->type != NET_CLIENT_DRIVER_NIC ||
1040 !opts->u.nic.has_netdev) {
1041 peer = net_hub_add_port(0, NULL, NULL);
1045 if (net_client_init_fun[netdev->type](netdev, name, peer, errp) < 0) {
1046 /* FIXME drop when all init functions store an Error */
1047 if (errp && !*errp) {
1048 error_setg(errp, QERR_DEVICE_INIT_FAILED,
1049 NetClientDriver_str(netdev->type));
1056 static void show_netdevs(void)
1059 const char *available_netdevs[] = {
1066 #ifdef CONFIG_L2TPV3
1072 #ifdef CONFIG_NET_BRIDGE
1075 #ifdef CONFIG_NETMAP
1083 printf("Available netdev backend types:\n");
1084 for (idx = 0; idx < ARRAY_SIZE(available_netdevs); idx++) {
1085 puts(available_netdevs[idx]);
1089 static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp)
1091 void *object = NULL;
1094 Visitor *v = opts_visitor_new(opts);
1096 const char *type = qemu_opt_get(opts, "type");
1098 if (is_netdev && type && is_help_option(type)) {
1102 /* Parse convenience option format ip6-net=fec0::0[/64] */
1103 const char *ip6_net = qemu_opt_get(opts, "ipv6-net");
1106 char buf[strlen(ip6_net) + 1];
1108 if (get_str_sep(buf, sizeof(buf), &ip6_net, '/') < 0) {
1109 /* Default 64bit prefix length. */
1110 qemu_opt_set(opts, "ipv6-prefix", ip6_net, &error_abort);
1111 qemu_opt_set_number(opts, "ipv6-prefixlen", 64, &error_abort);
1113 /* User-specified prefix length. */
1117 qemu_opt_set(opts, "ipv6-prefix", buf, &error_abort);
1118 err = qemu_strtoul(ip6_net, NULL, 10, &len);
1121 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
1122 "ipv6-prefix", "a number");
1124 qemu_opt_set_number(opts, "ipv6-prefixlen", len,
1128 qemu_opt_unset(opts, "ipv6-net");
1133 visit_type_Netdev(v, NULL, (Netdev **)&object, &err);
1135 visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err);
1139 ret = net_client_init1(object, is_netdev, &err);
1143 qapi_free_Netdev(object);
1145 qapi_free_NetLegacy(object);
1148 error_propagate(errp, err);
1153 void netdev_add(QemuOpts *opts, Error **errp)
1155 net_client_init(opts, true, errp);
1158 void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp)
1160 Error *local_err = NULL;
1161 QemuOptsList *opts_list;
1164 opts_list = qemu_find_opts_err("netdev", &local_err);
1169 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
1174 netdev_add(opts, &local_err);
1176 qemu_opts_del(opts);
1181 error_propagate(errp, local_err);
1184 void qmp_netdev_del(const char *id, Error **errp)
1189 nc = qemu_find_netdev(id);
1191 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1192 "Device '%s' not found", id);
1196 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
1198 error_setg(errp, "Device '%s' is not a netdev", id);
1202 qemu_del_net_client(nc);
1203 qemu_opts_del(opts);
1206 static void netfilter_print_info(Monitor *mon, NetFilterState *nf)
1209 ObjectProperty *prop;
1210 ObjectPropertyIterator iter;
1213 /* generate info str */
1214 object_property_iter_init(&iter, OBJECT(nf));
1215 while ((prop = object_property_iter_next(&iter))) {
1216 if (!strcmp(prop->name, "type")) {
1219 v = string_output_visitor_new(false, &str);
1220 object_property_get(OBJECT(nf), v, prop->name, NULL);
1221 visit_complete(v, &str);
1223 monitor_printf(mon, ",%s=%s", prop->name, str);
1226 monitor_printf(mon, "\n");
1229 void print_net_client(Monitor *mon, NetClientState *nc)
1233 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
1235 NetClientDriver_str(nc->info->type),
1237 if (!QTAILQ_EMPTY(&nc->filters)) {
1238 monitor_printf(mon, "filters:\n");
1240 QTAILQ_FOREACH(nf, &nc->filters, next) {
1241 char *path = object_get_canonical_path_component(OBJECT(nf));
1243 monitor_printf(mon, " - %s: type=%s", path,
1244 object_get_typename(OBJECT(nf)));
1245 netfilter_print_info(mon, nf);
1250 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
1254 RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
1256 QTAILQ_FOREACH(nc, &net_clients, next) {
1257 RxFilterInfoList *entry;
1260 if (has_name && strcmp(nc->name, name) != 0) {
1264 /* only query rx-filter information of NIC */
1265 if (nc->info->type != NET_CLIENT_DRIVER_NIC) {
1267 error_setg(errp, "net client(%s) isn't a NIC", name);
1273 /* only query information on queue 0 since the info is per nic,
1276 if (nc->queue_index != 0)
1279 if (nc->info->query_rx_filter) {
1280 info = nc->info->query_rx_filter(nc);
1281 entry = g_malloc0(sizeof(*entry));
1282 entry->value = info;
1285 filter_list = entry;
1287 last_entry->next = entry;
1290 } else if (has_name) {
1291 error_setg(errp, "net client(%s) doesn't support"
1292 " rx-filter querying", name);
1301 if (filter_list == NULL && has_name) {
1302 error_setg(errp, "invalid net client name: %s", name);
1308 void hmp_info_network(Monitor *mon, const QDict *qdict)
1310 NetClientState *nc, *peer;
1311 NetClientDriver type;
1315 QTAILQ_FOREACH(nc, &net_clients, next) {
1317 type = nc->info->type;
1319 /* Skip if already printed in hub info */
1320 if (net_hub_id_for_client(nc, NULL) == 0) {
1324 if (!peer || type == NET_CLIENT_DRIVER_NIC) {
1325 print_net_client(mon, nc);
1326 } /* else it's a netdev connected to a NIC, printed with the NIC */
1327 if (peer && type == NET_CLIENT_DRIVER_NIC) {
1328 monitor_printf(mon, " \\ ");
1329 print_net_client(mon, peer);
1334 void qmp_set_link(const char *name, bool up, Error **errp)
1336 NetClientState *ncs[MAX_QUEUE_NUM];
1340 queues = qemu_find_net_clients_except(name, ncs,
1341 NET_CLIENT_DRIVER__MAX,
1345 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1346 "Device '%s' not found", name);
1351 for (i = 0; i < queues; i++) {
1352 ncs[i]->link_down = !up;
1355 if (nc->info->link_status_changed) {
1356 nc->info->link_status_changed(nc);
1360 /* Change peer link only if the peer is NIC and then notify peer.
1361 * If the peer is a HUBPORT or a backend, we do not change the
1364 * This behavior is compatible with qemu hubs where there could be
1365 * multiple clients that can still communicate with each other in
1366 * disconnected mode. For now maintain this compatibility.
1368 if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
1369 for (i = 0; i < queues; i++) {
1370 ncs[i]->peer->link_down = !up;
1373 if (nc->peer->info->link_status_changed) {
1374 nc->peer->info->link_status_changed(nc->peer);
1379 static void net_vm_change_state_handler(void *opaque, int running,
1383 NetClientState *tmp;
1385 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
1387 /* Flush queued packets and wake up backends. */
1388 if (nc->peer && qemu_can_send_packet(nc)) {
1389 qemu_flush_queued_packets(nc->peer);
1392 /* Complete all queued packets, to guarantee we don't modify
1393 * state later when VM is not running.
1395 qemu_flush_or_purge_queued_packets(nc, true);
1400 void net_cleanup(void)
1404 /* We may del multiple entries during qemu_del_net_client(),
1405 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1407 while (!QTAILQ_EMPTY(&net_clients)) {
1408 nc = QTAILQ_FIRST(&net_clients);
1409 if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
1410 qemu_del_nic(qemu_get_nic(nc));
1412 qemu_del_net_client(nc);
1416 qemu_del_vm_change_state_handler(net_change_state_entry);
1419 void net_check_clients(void)
1424 net_hub_check_clients();
1426 QTAILQ_FOREACH(nc, &net_clients, next) {
1428 warn_report("%s %s has no peer",
1429 nc->info->type == NET_CLIENT_DRIVER_NIC
1435 /* Check that all NICs requested via -net nic actually got created.
1436 * NICs created via -device don't need to be checked here because
1437 * they are always instantiated.
1439 for (i = 0; i < MAX_NICS; i++) {
1440 NICInfo *nd = &nd_table[i];
1441 if (nd->used && !nd->instantiated) {
1442 warn_report("requested NIC (%s, model %s) "
1443 "was not created (not supported by this machine?)",
1444 nd->name ? nd->name : "anonymous",
1445 nd->model ? nd->model : "unspecified");
1450 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp)
1452 return net_client_init(opts, false, errp);
1455 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp)
1457 return net_client_init(opts, true, errp);
1460 /* For the convenience "--nic" parameter */
1461 static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp)
1468 type = qemu_opt_get(opts, "type");
1469 if (type && g_str_equal(type, "none")) {
1470 return 0; /* Nothing to do, default_net is cleared in vl.c */
1473 idx = nic_get_free_idx();
1474 if (idx == -1 || nb_nics >= MAX_NICS) {
1475 error_setg(errp, "no more on-board/default NIC slots available");
1480 qemu_opt_set(opts, "type", "user", &error_abort);
1483 ni = &nd_table[idx];
1484 memset(ni, 0, sizeof(*ni));
1485 ni->model = qemu_opt_get_del(opts, "model");
1487 /* Create an ID if the user did not specify one */
1488 nd_id = g_strdup(qemu_opts_id(opts));
1490 nd_id = g_strdup_printf("__org.qemu.nic%i\n", idx);
1491 qemu_opts_set_id(opts, nd_id);
1494 /* Handle MAC address */
1495 mac = qemu_opt_get_del(opts, "mac");
1497 ret = net_parse_macaddr(ni->macaddr.a, mac);
1500 error_setg(errp, "invalid syntax for ethernet address");
1503 if (is_multicast_ether_addr(ni->macaddr.a)) {
1504 error_setg(errp, "NIC cannot have multicast MAC address");
1509 qemu_macaddr_default_if_unset(&ni->macaddr);
1511 ret = net_client_init(opts, true, errp);
1513 ni->netdev = qemu_find_netdev(nd_id);
1523 int net_init_clients(Error **errp)
1525 net_change_state_entry =
1526 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
1528 QTAILQ_INIT(&net_clients);
1530 if (qemu_opts_foreach(qemu_find_opts("netdev"),
1531 net_init_netdev, NULL, errp)) {
1535 if (qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL, errp)) {
1539 if (qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL, errp)) {
1546 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1548 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) {
1557 uint32_t net_crc32(const uint8_t *p, int len)
1564 for (i = 0; i < len; i++) {
1566 for (j = 0; j < 8; j++) {
1567 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1571 crc = ((crc ^ POLYNOMIAL_BE) | carry);
1579 uint32_t net_crc32_le(const uint8_t *p, int len)
1586 for (i = 0; i < len; i++) {
1588 for (j = 0; j < 8; j++) {
1589 carry = (crc & 0x1) ^ (b & 0x01);
1593 crc ^= POLYNOMIAL_LE;
1601 QemuOptsList qemu_netdev_opts = {
1603 .implied_opt_name = "type",
1604 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1607 * no elements => accept any params
1608 * validation will happen later
1610 { /* end of list */ }
1614 QemuOptsList qemu_nic_opts = {
1616 .implied_opt_name = "type",
1617 .head = QTAILQ_HEAD_INITIALIZER(qemu_nic_opts.head),
1620 * no elements => accept any params
1621 * validation will happen later
1623 { /* end of list */ }
1627 QemuOptsList qemu_net_opts = {
1629 .implied_opt_name = "type",
1630 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1633 * no elements => accept any params
1634 * validation will happen later
1636 { /* end of list */ }
1640 void net_socket_rs_init(SocketReadState *rs,
1641 SocketReadStateFinalize *finalize,
1645 rs->vnet_hdr = vnet_hdr;
1648 rs->vnet_hdr_len = 0;
1649 memset(rs->buf, 0, sizeof(rs->buf));
1650 rs->finalize = finalize;
1658 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size)
1663 /* Reassemble a packet from the network.
1664 * 0 = getting length.
1665 * 1 = getting vnet header length.
1668 switch (rs->state) {
1674 memcpy(rs->buf + rs->index, buf, l);
1678 if (rs->index == 4) {
1680 rs->packet_len = ntohl(*(uint32_t *)rs->buf);
1686 rs->vnet_hdr_len = 0;
1695 memcpy(rs->buf + rs->index, buf, l);
1699 if (rs->index == 4) {
1700 /* got vnet header length */
1701 rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf);
1707 l = rs->packet_len - rs->index;
1711 if (rs->index + l <= sizeof(rs->buf)) {
1712 memcpy(rs->buf + rs->index, buf, l);
1714 fprintf(stderr, "serious error: oversized packet received,"
1715 "connection terminated.\n");
1716 rs->index = rs->state = 0;
1723 if (rs->index >= rs->packet_len) {
1726 assert(rs->finalize);