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)
234 static ssize_t qemu_deliver_packet_iov(NetClientState *sender,
236 const struct iovec *iov,
240 static void qemu_net_client_setup(NetClientState *nc,
242 NetClientState *peer,
245 NetClientDestructor *destructor)
248 nc->model = g_strdup(model);
250 nc->name = g_strdup(name);
252 nc->name = assign_name(nc, model);
260 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
262 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc);
263 nc->destructor = destructor;
264 QTAILQ_INIT(&nc->filters);
267 NetClientState *qemu_new_net_client(NetClientInfo *info,
268 NetClientState *peer,
274 assert(info->size >= sizeof(NetClientState));
276 nc = g_malloc0(info->size);
277 qemu_net_client_setup(nc, info, peer, model, name,
278 qemu_net_client_destructor);
283 NICState *qemu_new_nic(NetClientInfo *info,
289 NetClientState **peers = conf->peers.ncs;
291 int i, queues = MAX(1, conf->peers.queues);
293 assert(info->type == NET_CLIENT_DRIVER_NIC);
294 assert(info->size >= sizeof(NICState));
296 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
297 nic->ncs = (void *)nic + info->size;
299 nic->opaque = opaque;
301 for (i = 0; i < queues; i++) {
302 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
304 nic->ncs[i].queue_index = i;
310 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
312 return nic->ncs + queue_index;
315 NetClientState *qemu_get_queue(NICState *nic)
317 return qemu_get_subqueue(nic, 0);
320 NICState *qemu_get_nic(NetClientState *nc)
322 NetClientState *nc0 = nc - nc->queue_index;
324 return (NICState *)((void *)nc0 - nc->info->size);
327 void *qemu_get_nic_opaque(NetClientState *nc)
329 NICState *nic = qemu_get_nic(nc);
334 static void qemu_cleanup_net_client(NetClientState *nc)
336 QTAILQ_REMOVE(&net_clients, nc, next);
338 if (nc->info->cleanup) {
339 nc->info->cleanup(nc);
343 static void qemu_free_net_client(NetClientState *nc)
345 if (nc->incoming_queue) {
346 qemu_del_net_queue(nc->incoming_queue);
349 nc->peer->peer = NULL;
353 if (nc->destructor) {
358 void qemu_del_net_client(NetClientState *nc)
360 NetClientState *ncs[MAX_QUEUE_NUM];
362 NetFilterState *nf, *next;
364 assert(nc->info->type != NET_CLIENT_DRIVER_NIC);
366 /* If the NetClientState belongs to a multiqueue backend, we will change all
367 * other NetClientStates also.
369 queues = qemu_find_net_clients_except(nc->name, ncs,
370 NET_CLIENT_DRIVER_NIC,
374 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) {
375 object_unparent(OBJECT(nf));
378 /* If there is a peer NIC, delete and cleanup client, but do not free. */
379 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
380 NICState *nic = qemu_get_nic(nc->peer);
381 if (nic->peer_deleted) {
384 nic->peer_deleted = true;
386 for (i = 0; i < queues; i++) {
387 ncs[i]->peer->link_down = true;
390 if (nc->peer->info->link_status_changed) {
391 nc->peer->info->link_status_changed(nc->peer);
394 for (i = 0; i < queues; i++) {
395 qemu_cleanup_net_client(ncs[i]);
401 for (i = 0; i < queues; i++) {
402 qemu_cleanup_net_client(ncs[i]);
403 qemu_free_net_client(ncs[i]);
407 void qemu_del_nic(NICState *nic)
409 int i, queues = MAX(nic->conf->peers.queues, 1);
411 qemu_macaddr_set_free(&nic->conf->macaddr);
413 /* If this is a peer NIC and peer has already been deleted, free it now. */
414 if (nic->peer_deleted) {
415 for (i = 0; i < queues; i++) {
416 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
420 for (i = queues - 1; i >= 0; i--) {
421 NetClientState *nc = qemu_get_subqueue(nic, i);
423 qemu_cleanup_net_client(nc);
424 qemu_free_net_client(nc);
430 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
434 QTAILQ_FOREACH(nc, &net_clients, next) {
435 if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
436 if (nc->queue_index == 0) {
437 func(qemu_get_nic(nc), opaque);
443 bool qemu_has_ufo(NetClientState *nc)
445 if (!nc || !nc->info->has_ufo) {
449 return nc->info->has_ufo(nc);
452 bool qemu_has_vnet_hdr(NetClientState *nc)
454 if (!nc || !nc->info->has_vnet_hdr) {
458 return nc->info->has_vnet_hdr(nc);
461 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
463 if (!nc || !nc->info->has_vnet_hdr_len) {
467 return nc->info->has_vnet_hdr_len(nc, len);
470 void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
472 if (!nc || !nc->info->using_vnet_hdr) {
476 nc->info->using_vnet_hdr(nc, enable);
479 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
482 if (!nc || !nc->info->set_offload) {
486 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
489 void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
491 if (!nc || !nc->info->set_vnet_hdr_len) {
495 nc->vnet_hdr_len = len;
496 nc->info->set_vnet_hdr_len(nc, len);
499 int qemu_set_vnet_le(NetClientState *nc, bool is_le)
501 #ifdef HOST_WORDS_BIGENDIAN
502 if (!nc || !nc->info->set_vnet_le) {
506 return nc->info->set_vnet_le(nc, is_le);
512 int qemu_set_vnet_be(NetClientState *nc, bool is_be)
514 #ifdef HOST_WORDS_BIGENDIAN
517 if (!nc || !nc->info->set_vnet_be) {
521 return nc->info->set_vnet_be(nc, is_be);
525 int qemu_can_send_packet(NetClientState *sender)
527 int vm_running = runstate_is_running();
537 if (sender->peer->receive_disabled) {
539 } else if (sender->peer->info->can_receive &&
540 !sender->peer->info->can_receive(sender->peer)) {
546 static ssize_t filter_receive_iov(NetClientState *nc,
547 NetFilterDirection direction,
548 NetClientState *sender,
550 const struct iovec *iov,
552 NetPacketSent *sent_cb)
555 NetFilterState *nf = NULL;
557 if (direction == NET_FILTER_DIRECTION_TX) {
558 QTAILQ_FOREACH(nf, &nc->filters, next) {
559 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
566 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, NetFilterHead, next) {
567 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
578 static ssize_t filter_receive(NetClientState *nc,
579 NetFilterDirection direction,
580 NetClientState *sender,
584 NetPacketSent *sent_cb)
587 .iov_base = (void *)data,
591 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb);
594 void qemu_purge_queued_packets(NetClientState *nc)
600 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
603 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge)
605 nc->receive_disabled = 0;
607 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_HUBPORT) {
608 if (net_hub_flush(nc->peer)) {
612 if (qemu_net_queue_flush(nc->incoming_queue)) {
613 /* We emptied the queue successfully, signal to the IO thread to repoll
614 * the file descriptor (for tap, for example).
618 /* Unable to empty the queue, purge remaining packets */
619 qemu_net_queue_purge(nc->incoming_queue, nc);
623 void qemu_flush_queued_packets(NetClientState *nc)
625 qemu_flush_or_purge_queued_packets(nc, false);
628 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
630 const uint8_t *buf, int size,
631 NetPacketSent *sent_cb)
637 printf("qemu_send_packet_async:\n");
638 qemu_hexdump((const char *)buf, stdout, "net", size);
641 if (sender->link_down || !sender->peer) {
645 /* Let filters handle the packet first */
646 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX,
647 sender, flags, buf, size, sent_cb);
652 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX,
653 sender, flags, buf, size, sent_cb);
658 queue = sender->peer->incoming_queue;
660 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
663 ssize_t qemu_send_packet_async(NetClientState *sender,
664 const uint8_t *buf, int size,
665 NetPacketSent *sent_cb)
667 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
671 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
673 qemu_send_packet_async(nc, buf, size, NULL);
676 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
678 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
682 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
683 int iovcnt, unsigned flags)
691 buffer = iov[0].iov_base;
692 offset = iov[0].iov_len;
694 offset = iov_size(iov, iovcnt);
695 if (offset > NET_BUFSIZE) {
698 buf = g_malloc(offset);
700 offset = iov_to_buf(iov, iovcnt, 0, buf, offset);
703 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
704 ret = nc->info->receive_raw(nc, buffer, offset);
706 ret = nc->info->receive(nc, buffer, offset);
713 static ssize_t qemu_deliver_packet_iov(NetClientState *sender,
715 const struct iovec *iov,
719 NetClientState *nc = opaque;
724 return iov_size(iov, iovcnt);
727 if (nc->receive_disabled) {
731 if (nc->info->receive_iov && !(flags & QEMU_NET_PACKET_FLAG_RAW)) {
732 ret = nc->info->receive_iov(nc, iov, iovcnt);
734 ret = nc_sendv_compat(nc, iov, iovcnt, flags);
738 nc->receive_disabled = 1;
744 ssize_t qemu_sendv_packet_async(NetClientState *sender,
745 const struct iovec *iov, int iovcnt,
746 NetPacketSent *sent_cb)
749 size_t size = iov_size(iov, iovcnt);
752 if (size > NET_BUFSIZE) {
756 if (sender->link_down || !sender->peer) {
760 /* Let filters handle the packet first */
761 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender,
762 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb);
767 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender,
768 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb);
773 queue = sender->peer->incoming_queue;
775 return qemu_net_queue_send_iov(queue, sender,
776 QEMU_NET_PACKET_FLAG_NONE,
777 iov, iovcnt, sent_cb);
781 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
783 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
786 NetClientState *qemu_find_netdev(const char *id)
790 QTAILQ_FOREACH(nc, &net_clients, next) {
791 if (nc->info->type == NET_CLIENT_DRIVER_NIC)
793 if (!strcmp(nc->name, id)) {
801 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
802 NetClientDriver type, int max)
807 QTAILQ_FOREACH(nc, &net_clients, next) {
808 if (nc->info->type == type) {
811 if (!id || !strcmp(nc->name, id)) {
822 static int nic_get_free_idx(void)
826 for (index = 0; index < MAX_NICS; index++)
827 if (!nd_table[index].used)
832 int qemu_show_nic_models(const char *arg, const char *const *models)
836 if (!arg || !is_help_option(arg)) {
840 fprintf(stderr, "qemu: Supported NIC models: ");
841 for (i = 0 ; models[i]; i++)
842 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
846 void qemu_check_nic_model(NICInfo *nd, const char *model)
848 const char *models[2];
853 if (qemu_show_nic_models(nd->model, models))
855 if (qemu_find_nic_model(nd, models, model) < 0)
859 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
860 const char *default_model)
865 nd->model = g_strdup(default_model);
867 for (i = 0 ; models[i]; i++) {
868 if (strcmp(nd->model, models[i]) == 0)
872 error_report("Unsupported NIC model: %s", nd->model);
876 static int net_init_nic(const Netdev *netdev, const char *name,
877 NetClientState *peer, Error **errp)
881 const NetLegacyNicOptions *nic;
883 assert(netdev->type == NET_CLIENT_DRIVER_NIC);
884 nic = &netdev->u.nic;
886 idx = nic_get_free_idx();
887 if (idx == -1 || nb_nics >= MAX_NICS) {
888 error_setg(errp, "too many NICs");
894 memset(nd, 0, sizeof(*nd));
896 if (nic->has_netdev) {
897 nd->netdev = qemu_find_netdev(nic->netdev);
899 error_setg(errp, "netdev '%s' not found", nic->netdev);
906 nd->name = g_strdup(name);
907 if (nic->has_model) {
908 nd->model = g_strdup(nic->model);
911 nd->devaddr = g_strdup(nic->addr);
914 if (nic->has_macaddr &&
915 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
916 error_setg(errp, "invalid syntax for ethernet address");
919 if (nic->has_macaddr &&
920 is_multicast_ether_addr(nd->macaddr.a)) {
922 "NIC cannot have multicast MAC address (odd 1st byte)");
925 qemu_macaddr_default_if_unset(&nd->macaddr);
927 if (nic->has_vectors) {
928 if (nic->vectors > 0x7ffffff) {
929 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors);
932 nd->nvectors = nic->vectors;
934 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
944 static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])(
945 const Netdev *netdev,
947 NetClientState *peer, Error **errp) = {
948 [NET_CLIENT_DRIVER_NIC] = net_init_nic,
950 [NET_CLIENT_DRIVER_USER] = net_init_slirp,
952 [NET_CLIENT_DRIVER_TAP] = net_init_tap,
953 [NET_CLIENT_DRIVER_SOCKET] = net_init_socket,
955 [NET_CLIENT_DRIVER_VDE] = net_init_vde,
958 [NET_CLIENT_DRIVER_NETMAP] = net_init_netmap,
960 #ifdef CONFIG_NET_BRIDGE
961 [NET_CLIENT_DRIVER_BRIDGE] = net_init_bridge,
963 [NET_CLIENT_DRIVER_HUBPORT] = net_init_hubport,
964 #ifdef CONFIG_VHOST_NET_USED
965 [NET_CLIENT_DRIVER_VHOST_USER] = net_init_vhost_user,
968 [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3,
973 static int net_client_init1(const void *object, bool is_netdev, Error **errp)
976 const Netdev *netdev;
978 NetClientState *peer = NULL;
984 if (netdev->type == NET_CLIENT_DRIVER_NIC ||
985 !net_client_init_fun[netdev->type]) {
986 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
987 "a netdev backend type");
991 const NetLegacy *net = object;
992 const NetLegacyOptions *opts = net->opts;
995 /* missing optional values have been initialized to "all bits zero" */
996 name = net->has_id ? net->id : net->name;
999 warn_report("The 'name' parameter is deprecated, use 'id' instead");
1002 /* Map the old options to the new flat type */
1003 switch (opts->type) {
1004 case NET_LEGACY_OPTIONS_TYPE_NONE:
1005 return 0; /* nothing to do */
1006 case NET_LEGACY_OPTIONS_TYPE_NIC:
1007 legacy.type = NET_CLIENT_DRIVER_NIC;
1008 legacy.u.nic = opts->u.nic;
1010 case NET_LEGACY_OPTIONS_TYPE_USER:
1011 legacy.type = NET_CLIENT_DRIVER_USER;
1012 legacy.u.user = opts->u.user;
1014 case NET_LEGACY_OPTIONS_TYPE_TAP:
1015 legacy.type = NET_CLIENT_DRIVER_TAP;
1016 legacy.u.tap = opts->u.tap;
1018 case NET_LEGACY_OPTIONS_TYPE_L2TPV3:
1019 legacy.type = NET_CLIENT_DRIVER_L2TPV3;
1020 legacy.u.l2tpv3 = opts->u.l2tpv3;
1022 case NET_LEGACY_OPTIONS_TYPE_SOCKET:
1023 legacy.type = NET_CLIENT_DRIVER_SOCKET;
1024 legacy.u.socket = opts->u.socket;
1026 case NET_LEGACY_OPTIONS_TYPE_VDE:
1027 legacy.type = NET_CLIENT_DRIVER_VDE;
1028 legacy.u.vde = opts->u.vde;
1030 case NET_LEGACY_OPTIONS_TYPE_BRIDGE:
1031 legacy.type = NET_CLIENT_DRIVER_BRIDGE;
1032 legacy.u.bridge = opts->u.bridge;
1034 case NET_LEGACY_OPTIONS_TYPE_NETMAP:
1035 legacy.type = NET_CLIENT_DRIVER_NETMAP;
1036 legacy.u.netmap = opts->u.netmap;
1038 case NET_LEGACY_OPTIONS_TYPE_VHOST_USER:
1039 legacy.type = NET_CLIENT_DRIVER_VHOST_USER;
1040 legacy.u.vhost_user = opts->u.vhost_user;
1046 if (!net_client_init_fun[netdev->type]) {
1047 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
1048 "a net backend type (maybe it is not compiled "
1049 "into this binary)");
1053 /* Do not add to a hub if it's a nic with a netdev= parameter. */
1054 if (netdev->type != NET_CLIENT_DRIVER_NIC ||
1055 !opts->u.nic.has_netdev) {
1056 peer = net_hub_add_port(0, NULL, NULL);
1060 if (net_client_init_fun[netdev->type](netdev, name, peer, errp) < 0) {
1061 /* FIXME drop when all init functions store an Error */
1062 if (errp && !*errp) {
1063 error_setg(errp, QERR_DEVICE_INIT_FAILED,
1064 NetClientDriver_str(netdev->type));
1071 static void show_netdevs(void)
1074 const char *available_netdevs[] = {
1081 #ifdef CONFIG_L2TPV3
1087 #ifdef CONFIG_NET_BRIDGE
1090 #ifdef CONFIG_NETMAP
1098 printf("Available netdev backend types:\n");
1099 for (idx = 0; idx < ARRAY_SIZE(available_netdevs); idx++) {
1100 puts(available_netdevs[idx]);
1104 static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp)
1106 void *object = NULL;
1109 Visitor *v = opts_visitor_new(opts);
1111 const char *type = qemu_opt_get(opts, "type");
1113 if (is_netdev && type && is_help_option(type)) {
1117 /* Parse convenience option format ip6-net=fec0::0[/64] */
1118 const char *ip6_net = qemu_opt_get(opts, "ipv6-net");
1121 char buf[strlen(ip6_net) + 1];
1123 if (get_str_sep(buf, sizeof(buf), &ip6_net, '/') < 0) {
1124 /* Default 64bit prefix length. */
1125 qemu_opt_set(opts, "ipv6-prefix", ip6_net, &error_abort);
1126 qemu_opt_set_number(opts, "ipv6-prefixlen", 64, &error_abort);
1128 /* User-specified prefix length. */
1132 qemu_opt_set(opts, "ipv6-prefix", buf, &error_abort);
1133 err = qemu_strtoul(ip6_net, NULL, 10, &len);
1136 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
1137 "ipv6-prefix", "a number");
1139 qemu_opt_set_number(opts, "ipv6-prefixlen", len,
1143 qemu_opt_unset(opts, "ipv6-net");
1148 visit_type_Netdev(v, NULL, (Netdev **)&object, &err);
1150 visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err);
1154 ret = net_client_init1(object, is_netdev, &err);
1158 qapi_free_Netdev(object);
1160 qapi_free_NetLegacy(object);
1163 error_propagate(errp, err);
1168 void netdev_add(QemuOpts *opts, Error **errp)
1170 net_client_init(opts, true, errp);
1173 void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp)
1175 Error *local_err = NULL;
1176 QemuOptsList *opts_list;
1179 opts_list = qemu_find_opts_err("netdev", &local_err);
1184 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
1189 netdev_add(opts, &local_err);
1191 qemu_opts_del(opts);
1196 error_propagate(errp, local_err);
1199 void qmp_netdev_del(const char *id, Error **errp)
1204 nc = qemu_find_netdev(id);
1206 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1207 "Device '%s' not found", id);
1211 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
1213 error_setg(errp, "Device '%s' is not a netdev", id);
1217 qemu_del_net_client(nc);
1218 qemu_opts_del(opts);
1221 static void netfilter_print_info(Monitor *mon, NetFilterState *nf)
1224 ObjectProperty *prop;
1225 ObjectPropertyIterator iter;
1228 /* generate info str */
1229 object_property_iter_init(&iter, OBJECT(nf));
1230 while ((prop = object_property_iter_next(&iter))) {
1231 if (!strcmp(prop->name, "type")) {
1234 v = string_output_visitor_new(false, &str);
1235 object_property_get(OBJECT(nf), v, prop->name, NULL);
1236 visit_complete(v, &str);
1238 monitor_printf(mon, ",%s=%s", prop->name, str);
1241 monitor_printf(mon, "\n");
1244 void print_net_client(Monitor *mon, NetClientState *nc)
1248 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
1250 NetClientDriver_str(nc->info->type),
1252 if (!QTAILQ_EMPTY(&nc->filters)) {
1253 monitor_printf(mon, "filters:\n");
1255 QTAILQ_FOREACH(nf, &nc->filters, next) {
1256 char *path = object_get_canonical_path_component(OBJECT(nf));
1258 monitor_printf(mon, " - %s: type=%s", path,
1259 object_get_typename(OBJECT(nf)));
1260 netfilter_print_info(mon, nf);
1265 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
1269 RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
1271 QTAILQ_FOREACH(nc, &net_clients, next) {
1272 RxFilterInfoList *entry;
1275 if (has_name && strcmp(nc->name, name) != 0) {
1279 /* only query rx-filter information of NIC */
1280 if (nc->info->type != NET_CLIENT_DRIVER_NIC) {
1282 error_setg(errp, "net client(%s) isn't a NIC", name);
1288 /* only query information on queue 0 since the info is per nic,
1291 if (nc->queue_index != 0)
1294 if (nc->info->query_rx_filter) {
1295 info = nc->info->query_rx_filter(nc);
1296 entry = g_malloc0(sizeof(*entry));
1297 entry->value = info;
1300 filter_list = entry;
1302 last_entry->next = entry;
1305 } else if (has_name) {
1306 error_setg(errp, "net client(%s) doesn't support"
1307 " rx-filter querying", name);
1316 if (filter_list == NULL && has_name) {
1317 error_setg(errp, "invalid net client name: %s", name);
1323 void hmp_info_network(Monitor *mon, const QDict *qdict)
1325 NetClientState *nc, *peer;
1326 NetClientDriver type;
1330 QTAILQ_FOREACH(nc, &net_clients, next) {
1332 type = nc->info->type;
1334 /* Skip if already printed in hub info */
1335 if (net_hub_id_for_client(nc, NULL) == 0) {
1339 if (!peer || type == NET_CLIENT_DRIVER_NIC) {
1340 print_net_client(mon, nc);
1341 } /* else it's a netdev connected to a NIC, printed with the NIC */
1342 if (peer && type == NET_CLIENT_DRIVER_NIC) {
1343 monitor_printf(mon, " \\ ");
1344 print_net_client(mon, peer);
1349 void colo_notify_filters_event(int event, Error **errp)
1353 NetFilterClass *nfc = NULL;
1354 Error *local_err = NULL;
1356 QTAILQ_FOREACH(nc, &net_clients, next) {
1357 QTAILQ_FOREACH(nf, &nc->filters, next) {
1358 nfc = NETFILTER_GET_CLASS(OBJECT(nf));
1359 nfc->handle_event(nf, event, &local_err);
1361 error_propagate(errp, local_err);
1368 void qmp_set_link(const char *name, bool up, Error **errp)
1370 NetClientState *ncs[MAX_QUEUE_NUM];
1374 queues = qemu_find_net_clients_except(name, ncs,
1375 NET_CLIENT_DRIVER__MAX,
1379 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1380 "Device '%s' not found", name);
1385 for (i = 0; i < queues; i++) {
1386 ncs[i]->link_down = !up;
1389 if (nc->info->link_status_changed) {
1390 nc->info->link_status_changed(nc);
1394 /* Change peer link only if the peer is NIC and then notify peer.
1395 * If the peer is a HUBPORT or a backend, we do not change the
1398 * This behavior is compatible with qemu hubs where there could be
1399 * multiple clients that can still communicate with each other in
1400 * disconnected mode. For now maintain this compatibility.
1402 if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
1403 for (i = 0; i < queues; i++) {
1404 ncs[i]->peer->link_down = !up;
1407 if (nc->peer->info->link_status_changed) {
1408 nc->peer->info->link_status_changed(nc->peer);
1413 static void net_vm_change_state_handler(void *opaque, int running,
1417 NetClientState *tmp;
1419 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
1421 /* Flush queued packets and wake up backends. */
1422 if (nc->peer && qemu_can_send_packet(nc)) {
1423 qemu_flush_queued_packets(nc->peer);
1426 /* Complete all queued packets, to guarantee we don't modify
1427 * state later when VM is not running.
1429 qemu_flush_or_purge_queued_packets(nc, true);
1434 void net_cleanup(void)
1438 /* We may del multiple entries during qemu_del_net_client(),
1439 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1441 while (!QTAILQ_EMPTY(&net_clients)) {
1442 nc = QTAILQ_FIRST(&net_clients);
1443 if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
1444 qemu_del_nic(qemu_get_nic(nc));
1446 qemu_del_net_client(nc);
1450 qemu_del_vm_change_state_handler(net_change_state_entry);
1453 void net_check_clients(void)
1458 net_hub_check_clients();
1460 QTAILQ_FOREACH(nc, &net_clients, next) {
1462 warn_report("%s %s has no peer",
1463 nc->info->type == NET_CLIENT_DRIVER_NIC
1469 /* Check that all NICs requested via -net nic actually got created.
1470 * NICs created via -device don't need to be checked here because
1471 * they are always instantiated.
1473 for (i = 0; i < MAX_NICS; i++) {
1474 NICInfo *nd = &nd_table[i];
1475 if (nd->used && !nd->instantiated) {
1476 warn_report("requested NIC (%s, model %s) "
1477 "was not created (not supported by this machine?)",
1478 nd->name ? nd->name : "anonymous",
1479 nd->model ? nd->model : "unspecified");
1484 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp)
1486 return net_client_init(opts, false, errp);
1489 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp)
1491 return net_client_init(opts, true, errp);
1494 /* For the convenience "--nic" parameter */
1495 static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp)
1502 type = qemu_opt_get(opts, "type");
1503 if (type && g_str_equal(type, "none")) {
1504 return 0; /* Nothing to do, default_net is cleared in vl.c */
1507 idx = nic_get_free_idx();
1508 if (idx == -1 || nb_nics >= MAX_NICS) {
1509 error_setg(errp, "no more on-board/default NIC slots available");
1514 qemu_opt_set(opts, "type", "user", &error_abort);
1517 ni = &nd_table[idx];
1518 memset(ni, 0, sizeof(*ni));
1519 ni->model = qemu_opt_get_del(opts, "model");
1521 /* Create an ID if the user did not specify one */
1522 nd_id = g_strdup(qemu_opts_id(opts));
1524 nd_id = g_strdup_printf("__org.qemu.nic%i\n", idx);
1525 qemu_opts_set_id(opts, nd_id);
1528 /* Handle MAC address */
1529 mac = qemu_opt_get_del(opts, "mac");
1531 ret = net_parse_macaddr(ni->macaddr.a, mac);
1534 error_setg(errp, "invalid syntax for ethernet address");
1537 if (is_multicast_ether_addr(ni->macaddr.a)) {
1538 error_setg(errp, "NIC cannot have multicast MAC address");
1543 qemu_macaddr_default_if_unset(&ni->macaddr);
1545 ret = net_client_init(opts, true, errp);
1547 ni->netdev = qemu_find_netdev(nd_id);
1557 int net_init_clients(Error **errp)
1559 net_change_state_entry =
1560 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
1562 QTAILQ_INIT(&net_clients);
1564 if (qemu_opts_foreach(qemu_find_opts("netdev"),
1565 net_init_netdev, NULL, errp)) {
1569 if (qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL, errp)) {
1573 if (qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL, errp)) {
1580 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1582 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) {
1591 uint32_t net_crc32(const uint8_t *p, int len)
1598 for (i = 0; i < len; i++) {
1600 for (j = 0; j < 8; j++) {
1601 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1605 crc = ((crc ^ POLYNOMIAL_BE) | carry);
1613 uint32_t net_crc32_le(const uint8_t *p, int len)
1620 for (i = 0; i < len; i++) {
1622 for (j = 0; j < 8; j++) {
1623 carry = (crc & 0x1) ^ (b & 0x01);
1627 crc ^= POLYNOMIAL_LE;
1635 QemuOptsList qemu_netdev_opts = {
1637 .implied_opt_name = "type",
1638 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1641 * no elements => accept any params
1642 * validation will happen later
1644 { /* end of list */ }
1648 QemuOptsList qemu_nic_opts = {
1650 .implied_opt_name = "type",
1651 .head = QTAILQ_HEAD_INITIALIZER(qemu_nic_opts.head),
1654 * no elements => accept any params
1655 * validation will happen later
1657 { /* end of list */ }
1661 QemuOptsList qemu_net_opts = {
1663 .implied_opt_name = "type",
1664 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1667 * no elements => accept any params
1668 * validation will happen later
1670 { /* end of list */ }
1674 void net_socket_rs_init(SocketReadState *rs,
1675 SocketReadStateFinalize *finalize,
1679 rs->vnet_hdr = vnet_hdr;
1682 rs->vnet_hdr_len = 0;
1683 memset(rs->buf, 0, sizeof(rs->buf));
1684 rs->finalize = finalize;
1692 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size)
1697 /* Reassemble a packet from the network.
1698 * 0 = getting length.
1699 * 1 = getting vnet header length.
1702 switch (rs->state) {
1708 memcpy(rs->buf + rs->index, buf, l);
1712 if (rs->index == 4) {
1714 rs->packet_len = ntohl(*(uint32_t *)rs->buf);
1720 rs->vnet_hdr_len = 0;
1729 memcpy(rs->buf + rs->index, buf, l);
1733 if (rs->index == 4) {
1734 /* got vnet header length */
1735 rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf);
1741 l = rs->packet_len - rs->index;
1745 if (rs->index + l <= sizeof(rs->buf)) {
1746 memcpy(rs->buf + rs->index, buf, l);
1748 fprintf(stderr, "serious error: oversized packet received,"
1749 "connection terminated.\n");
1750 rs->index = rs->state = 0;
1757 if (rs->index >= rs->packet_len) {
1760 assert(rs->finalize);