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 "hw/qdev-properties.h"
31 #include "net/slirp.h"
35 #include "monitor/monitor.h"
36 #include "qemu/help_option.h"
37 #include "qapi/qapi-commands-net.h"
38 #include "qapi/qapi-visit-net.h"
39 #include "qapi/qmp/qdict.h"
40 #include "qapi/qmp/qerror.h"
41 #include "qemu/error-report.h"
42 #include "qemu/sockets.h"
43 #include "qemu/cutils.h"
44 #include "qemu/config-file.h"
45 #include "qemu/ctype.h"
47 #include "qemu/main-loop.h"
48 #include "qemu/option.h"
49 #include "qapi/error.h"
50 #include "qapi/opts-visitor.h"
51 #include "sysemu/sysemu.h"
52 #include "sysemu/qtest.h"
53 #include "sysemu/runstate.h"
54 #include "sysemu/sysemu.h"
55 #include "net/filter.h"
56 #include "qapi/string-output-visitor.h"
58 /* Net bridge is currently not supported for W32. */
60 # define CONFIG_NET_BRIDGE
63 static VMChangeStateEntry *net_change_state_entry;
64 static QTAILQ_HEAD(, NetClientState) net_clients;
66 /***********************************************************/
67 /* network device redirectors */
69 int parse_host_port(struct sockaddr_in *saddr, const char *str,
74 const char *addr, *p, *r;
77 substrings = g_strsplit(str, ":", 2);
78 if (!substrings || !substrings[0] || !substrings[1]) {
79 error_setg(errp, "host address '%s' doesn't contain ':' "
80 "separating host from port", str);
88 saddr->sin_family = AF_INET;
89 if (addr[0] == '\0') {
90 saddr->sin_addr.s_addr = 0;
92 if (qemu_isdigit(addr[0])) {
93 if (!inet_aton(addr, &saddr->sin_addr)) {
94 error_setg(errp, "host address '%s' is not a valid "
95 "IPv4 address", addr);
100 he = gethostbyname(addr);
102 error_setg(errp, "can't resolve host address '%s'", addr);
106 saddr->sin_addr = *(struct in_addr *)he->h_addr;
109 port = strtol(p, (char **)&r, 0);
111 error_setg(errp, "port number '%s' is invalid", p);
115 saddr->sin_port = htons(port);
118 g_strfreev(substrings);
122 char *qemu_mac_strdup_printf(const uint8_t *macaddr)
124 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
125 macaddr[0], macaddr[1], macaddr[2],
126 macaddr[3], macaddr[4], macaddr[5]);
129 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6])
131 snprintf(nc->info_str, sizeof(nc->info_str),
132 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
134 macaddr[0], macaddr[1], macaddr[2],
135 macaddr[3], macaddr[4], macaddr[5]);
138 static int mac_table[256] = {0};
140 static void qemu_macaddr_set_used(MACAddr *macaddr)
144 for (index = 0x56; index < 0xFF; index++) {
145 if (macaddr->a[5] == index) {
151 static void qemu_macaddr_set_free(MACAddr *macaddr)
154 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
156 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
159 for (index = 0x56; index < 0xFF; index++) {
160 if (macaddr->a[5] == index) {
166 static int qemu_macaddr_get_free(void)
170 for (index = 0x56; index < 0xFF; index++) {
171 if (mac_table[index] == 0) {
179 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
181 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
182 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
184 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) {
185 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
188 qemu_macaddr_set_used(macaddr);
193 macaddr->a[0] = 0x52;
194 macaddr->a[1] = 0x54;
195 macaddr->a[2] = 0x00;
196 macaddr->a[3] = 0x12;
197 macaddr->a[4] = 0x34;
198 macaddr->a[5] = qemu_macaddr_get_free();
199 qemu_macaddr_set_used(macaddr);
203 * Generate a name for net client
205 * Only net clients created with the legacy -net option and NICs need this.
207 static char *assign_name(NetClientState *nc1, const char *model)
212 QTAILQ_FOREACH(nc, &net_clients, next) {
216 if (strcmp(nc->model, model) == 0) {
221 return g_strdup_printf("%s.%d", model, id);
224 static void qemu_net_client_destructor(NetClientState *nc)
228 static ssize_t qemu_deliver_packet_iov(NetClientState *sender,
230 const struct iovec *iov,
234 static void qemu_net_client_setup(NetClientState *nc,
236 NetClientState *peer,
239 NetClientDestructor *destructor)
242 nc->model = g_strdup(model);
244 nc->name = g_strdup(name);
246 nc->name = assign_name(nc, model);
254 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
256 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc);
257 nc->destructor = destructor;
258 QTAILQ_INIT(&nc->filters);
261 NetClientState *qemu_new_net_client(NetClientInfo *info,
262 NetClientState *peer,
268 assert(info->size >= sizeof(NetClientState));
270 nc = g_malloc0(info->size);
271 qemu_net_client_setup(nc, info, peer, model, name,
272 qemu_net_client_destructor);
277 NICState *qemu_new_nic(NetClientInfo *info,
283 NetClientState **peers = conf->peers.ncs;
285 int i, queues = MAX(1, conf->peers.queues);
287 assert(info->type == NET_CLIENT_DRIVER_NIC);
288 assert(info->size >= sizeof(NICState));
290 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
291 nic->ncs = (void *)nic + info->size;
293 nic->opaque = opaque;
295 for (i = 0; i < queues; i++) {
296 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
298 nic->ncs[i].queue_index = i;
304 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
306 return nic->ncs + queue_index;
309 NetClientState *qemu_get_queue(NICState *nic)
311 return qemu_get_subqueue(nic, 0);
314 NICState *qemu_get_nic(NetClientState *nc)
316 NetClientState *nc0 = nc - nc->queue_index;
318 return (NICState *)((void *)nc0 - nc->info->size);
321 void *qemu_get_nic_opaque(NetClientState *nc)
323 NICState *nic = qemu_get_nic(nc);
328 static void qemu_cleanup_net_client(NetClientState *nc)
330 QTAILQ_REMOVE(&net_clients, nc, next);
332 if (nc->info->cleanup) {
333 nc->info->cleanup(nc);
337 static void qemu_free_net_client(NetClientState *nc)
339 if (nc->incoming_queue) {
340 qemu_del_net_queue(nc->incoming_queue);
343 nc->peer->peer = NULL;
347 if (nc->destructor) {
352 void qemu_del_net_client(NetClientState *nc)
354 NetClientState *ncs[MAX_QUEUE_NUM];
356 NetFilterState *nf, *next;
358 assert(nc->info->type != NET_CLIENT_DRIVER_NIC);
360 /* If the NetClientState belongs to a multiqueue backend, we will change all
361 * other NetClientStates also.
363 queues = qemu_find_net_clients_except(nc->name, ncs,
364 NET_CLIENT_DRIVER_NIC,
368 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) {
369 object_unparent(OBJECT(nf));
372 /* If there is a peer NIC, delete and cleanup client, but do not free. */
373 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
374 NICState *nic = qemu_get_nic(nc->peer);
375 if (nic->peer_deleted) {
378 nic->peer_deleted = true;
380 for (i = 0; i < queues; i++) {
381 ncs[i]->peer->link_down = true;
384 if (nc->peer->info->link_status_changed) {
385 nc->peer->info->link_status_changed(nc->peer);
388 for (i = 0; i < queues; i++) {
389 qemu_cleanup_net_client(ncs[i]);
395 for (i = 0; i < queues; i++) {
396 qemu_cleanup_net_client(ncs[i]);
397 qemu_free_net_client(ncs[i]);
401 void qemu_del_nic(NICState *nic)
403 int i, queues = MAX(nic->conf->peers.queues, 1);
405 qemu_macaddr_set_free(&nic->conf->macaddr);
407 /* If this is a peer NIC and peer has already been deleted, free it now. */
408 if (nic->peer_deleted) {
409 for (i = 0; i < queues; i++) {
410 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
414 for (i = queues - 1; i >= 0; i--) {
415 NetClientState *nc = qemu_get_subqueue(nic, i);
417 qemu_cleanup_net_client(nc);
418 qemu_free_net_client(nc);
424 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
428 QTAILQ_FOREACH(nc, &net_clients, next) {
429 if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
430 if (nc->queue_index == 0) {
431 func(qemu_get_nic(nc), opaque);
437 bool qemu_has_ufo(NetClientState *nc)
439 if (!nc || !nc->info->has_ufo) {
443 return nc->info->has_ufo(nc);
446 bool qemu_has_vnet_hdr(NetClientState *nc)
448 if (!nc || !nc->info->has_vnet_hdr) {
452 return nc->info->has_vnet_hdr(nc);
455 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
457 if (!nc || !nc->info->has_vnet_hdr_len) {
461 return nc->info->has_vnet_hdr_len(nc, len);
464 void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
466 if (!nc || !nc->info->using_vnet_hdr) {
470 nc->info->using_vnet_hdr(nc, enable);
473 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
476 if (!nc || !nc->info->set_offload) {
480 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
483 void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
485 if (!nc || !nc->info->set_vnet_hdr_len) {
489 nc->vnet_hdr_len = len;
490 nc->info->set_vnet_hdr_len(nc, len);
493 int qemu_set_vnet_le(NetClientState *nc, bool is_le)
495 #ifdef HOST_WORDS_BIGENDIAN
496 if (!nc || !nc->info->set_vnet_le) {
500 return nc->info->set_vnet_le(nc, is_le);
506 int qemu_set_vnet_be(NetClientState *nc, bool is_be)
508 #ifdef HOST_WORDS_BIGENDIAN
511 if (!nc || !nc->info->set_vnet_be) {
515 return nc->info->set_vnet_be(nc, is_be);
519 int qemu_can_send_packet(NetClientState *sender)
521 int vm_running = runstate_is_running();
531 if (sender->peer->receive_disabled) {
533 } else if (sender->peer->info->can_receive &&
534 !sender->peer->info->can_receive(sender->peer)) {
540 static ssize_t filter_receive_iov(NetClientState *nc,
541 NetFilterDirection direction,
542 NetClientState *sender,
544 const struct iovec *iov,
546 NetPacketSent *sent_cb)
549 NetFilterState *nf = NULL;
551 if (direction == NET_FILTER_DIRECTION_TX) {
552 QTAILQ_FOREACH(nf, &nc->filters, next) {
553 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
560 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, next) {
561 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
572 static ssize_t filter_receive(NetClientState *nc,
573 NetFilterDirection direction,
574 NetClientState *sender,
578 NetPacketSent *sent_cb)
581 .iov_base = (void *)data,
585 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb);
588 void qemu_purge_queued_packets(NetClientState *nc)
594 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
597 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge)
599 nc->receive_disabled = 0;
601 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_HUBPORT) {
602 if (net_hub_flush(nc->peer)) {
606 if (qemu_net_queue_flush(nc->incoming_queue)) {
607 /* We emptied the queue successfully, signal to the IO thread to repoll
608 * the file descriptor (for tap, for example).
612 /* Unable to empty the queue, purge remaining packets */
613 qemu_net_queue_purge(nc->incoming_queue, nc);
617 void qemu_flush_queued_packets(NetClientState *nc)
619 qemu_flush_or_purge_queued_packets(nc, false);
622 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
624 const uint8_t *buf, int size,
625 NetPacketSent *sent_cb)
631 printf("qemu_send_packet_async:\n");
632 qemu_hexdump((const char *)buf, stdout, "net", size);
635 if (sender->link_down || !sender->peer) {
639 /* Let filters handle the packet first */
640 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX,
641 sender, flags, buf, size, sent_cb);
646 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX,
647 sender, flags, buf, size, sent_cb);
652 queue = sender->peer->incoming_queue;
654 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
657 ssize_t qemu_send_packet_async(NetClientState *sender,
658 const uint8_t *buf, int size,
659 NetPacketSent *sent_cb)
661 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
665 ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
667 return qemu_send_packet_async(nc, buf, size, NULL);
670 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
672 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
676 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
677 int iovcnt, unsigned flags)
685 buffer = iov[0].iov_base;
686 offset = iov[0].iov_len;
688 offset = iov_size(iov, iovcnt);
689 if (offset > NET_BUFSIZE) {
692 buf = g_malloc(offset);
694 offset = iov_to_buf(iov, iovcnt, 0, buf, offset);
697 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
698 ret = nc->info->receive_raw(nc, buffer, offset);
700 ret = nc->info->receive(nc, buffer, offset);
707 static ssize_t qemu_deliver_packet_iov(NetClientState *sender,
709 const struct iovec *iov,
713 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)
743 size_t size = iov_size(iov, iovcnt);
746 if (size > NET_BUFSIZE) {
750 if (sender->link_down || !sender->peer) {
754 /* Let filters handle the packet first */
755 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender,
756 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb);
761 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender,
762 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb);
767 queue = sender->peer->incoming_queue;
769 return qemu_net_queue_send_iov(queue, sender,
770 QEMU_NET_PACKET_FLAG_NONE,
771 iov, iovcnt, sent_cb);
775 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
777 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
780 NetClientState *qemu_find_netdev(const char *id)
784 QTAILQ_FOREACH(nc, &net_clients, next) {
785 if (nc->info->type == NET_CLIENT_DRIVER_NIC)
787 if (!strcmp(nc->name, id)) {
795 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
796 NetClientDriver type, int max)
801 QTAILQ_FOREACH(nc, &net_clients, next) {
802 if (nc->info->type == type) {
805 if (!id || !strcmp(nc->name, id)) {
816 static int nic_get_free_idx(void)
820 for (index = 0; index < MAX_NICS; index++)
821 if (!nd_table[index].used)
826 int qemu_show_nic_models(const char *arg, const char *const *models)
830 if (!arg || !is_help_option(arg)) {
834 printf("Supported NIC models:\n");
835 for (i = 0 ; models[i]; i++) {
836 printf("%s\n", models[i]);
841 void qemu_check_nic_model(NICInfo *nd, const char *model)
843 const char *models[2];
848 if (qemu_show_nic_models(nd->model, models))
850 if (qemu_find_nic_model(nd, models, model) < 0)
854 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
855 const char *default_model)
860 nd->model = g_strdup(default_model);
862 for (i = 0 ; models[i]; i++) {
863 if (strcmp(nd->model, models[i]) == 0)
867 error_report("Unsupported NIC model: %s", nd->model);
871 static int net_init_nic(const Netdev *netdev, const char *name,
872 NetClientState *peer, Error **errp)
876 const NetLegacyNicOptions *nic;
878 assert(netdev->type == NET_CLIENT_DRIVER_NIC);
879 nic = &netdev->u.nic;
881 idx = nic_get_free_idx();
882 if (idx == -1 || nb_nics >= MAX_NICS) {
883 error_setg(errp, "too many NICs");
889 memset(nd, 0, sizeof(*nd));
891 if (nic->has_netdev) {
892 nd->netdev = qemu_find_netdev(nic->netdev);
894 error_setg(errp, "netdev '%s' not found", nic->netdev);
901 nd->name = g_strdup(name);
902 if (nic->has_model) {
903 nd->model = g_strdup(nic->model);
906 nd->devaddr = g_strdup(nic->addr);
909 if (nic->has_macaddr &&
910 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
911 error_setg(errp, "invalid syntax for ethernet address");
914 if (nic->has_macaddr &&
915 is_multicast_ether_addr(nd->macaddr.a)) {
917 "NIC cannot have multicast MAC address (odd 1st byte)");
920 qemu_macaddr_default_if_unset(&nd->macaddr);
922 if (nic->has_vectors) {
923 if (nic->vectors > 0x7ffffff) {
924 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors);
927 nd->nvectors = nic->vectors;
929 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
939 static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])(
940 const Netdev *netdev,
942 NetClientState *peer, Error **errp) = {
943 [NET_CLIENT_DRIVER_NIC] = net_init_nic,
945 [NET_CLIENT_DRIVER_USER] = net_init_slirp,
947 [NET_CLIENT_DRIVER_TAP] = net_init_tap,
948 [NET_CLIENT_DRIVER_SOCKET] = net_init_socket,
950 [NET_CLIENT_DRIVER_VDE] = net_init_vde,
953 [NET_CLIENT_DRIVER_NETMAP] = net_init_netmap,
955 #ifdef CONFIG_NET_BRIDGE
956 [NET_CLIENT_DRIVER_BRIDGE] = net_init_bridge,
958 [NET_CLIENT_DRIVER_HUBPORT] = net_init_hubport,
959 #ifdef CONFIG_VHOST_NET_USER
960 [NET_CLIENT_DRIVER_VHOST_USER] = net_init_vhost_user,
963 [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3,
968 static int net_client_init1(const void *object, bool is_netdev, Error **errp)
971 const Netdev *netdev;
973 NetClientState *peer = NULL;
979 if (netdev->type == NET_CLIENT_DRIVER_NIC ||
980 !net_client_init_fun[netdev->type]) {
981 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
982 "a netdev backend type");
986 const NetLegacy *net = object;
987 const NetLegacyOptions *opts = net->opts;
990 /* missing optional values have been initialized to "all bits zero" */
991 name = net->has_id ? net->id : net->name;
994 warn_report("The 'name' parameter is deprecated, use 'id' instead");
997 /* Map the old options to the new flat type */
998 switch (opts->type) {
999 case NET_LEGACY_OPTIONS_TYPE_NONE:
1000 return 0; /* nothing to do */
1001 case NET_LEGACY_OPTIONS_TYPE_NIC:
1002 legacy.type = NET_CLIENT_DRIVER_NIC;
1003 legacy.u.nic = opts->u.nic;
1005 case NET_LEGACY_OPTIONS_TYPE_USER:
1006 legacy.type = NET_CLIENT_DRIVER_USER;
1007 legacy.u.user = opts->u.user;
1009 case NET_LEGACY_OPTIONS_TYPE_TAP:
1010 legacy.type = NET_CLIENT_DRIVER_TAP;
1011 legacy.u.tap = opts->u.tap;
1013 case NET_LEGACY_OPTIONS_TYPE_L2TPV3:
1014 legacy.type = NET_CLIENT_DRIVER_L2TPV3;
1015 legacy.u.l2tpv3 = opts->u.l2tpv3;
1017 case NET_LEGACY_OPTIONS_TYPE_SOCKET:
1018 legacy.type = NET_CLIENT_DRIVER_SOCKET;
1019 legacy.u.socket = opts->u.socket;
1021 case NET_LEGACY_OPTIONS_TYPE_VDE:
1022 legacy.type = NET_CLIENT_DRIVER_VDE;
1023 legacy.u.vde = opts->u.vde;
1025 case NET_LEGACY_OPTIONS_TYPE_BRIDGE:
1026 legacy.type = NET_CLIENT_DRIVER_BRIDGE;
1027 legacy.u.bridge = opts->u.bridge;
1029 case NET_LEGACY_OPTIONS_TYPE_NETMAP:
1030 legacy.type = NET_CLIENT_DRIVER_NETMAP;
1031 legacy.u.netmap = opts->u.netmap;
1033 case NET_LEGACY_OPTIONS_TYPE_VHOST_USER:
1034 legacy.type = NET_CLIENT_DRIVER_VHOST_USER;
1035 legacy.u.vhost_user = opts->u.vhost_user;
1041 if (!net_client_init_fun[netdev->type]) {
1042 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
1043 "a net backend type (maybe it is not compiled "
1044 "into this binary)");
1048 /* Do not add to a hub if it's a nic with a netdev= parameter. */
1049 if (netdev->type != NET_CLIENT_DRIVER_NIC ||
1050 !opts->u.nic.has_netdev) {
1051 peer = net_hub_add_port(0, NULL, NULL);
1055 if (net_client_init_fun[netdev->type](netdev, name, peer, errp) < 0) {
1056 /* FIXME drop when all init functions store an Error */
1057 if (errp && !*errp) {
1058 error_setg(errp, QERR_DEVICE_INIT_FAILED,
1059 NetClientDriver_str(netdev->type));
1067 nc = qemu_find_netdev(netdev->id);
1069 nc->is_netdev = true;
1075 static void show_netdevs(void)
1078 const char *available_netdevs[] = {
1085 #ifdef CONFIG_L2TPV3
1091 #ifdef CONFIG_NET_BRIDGE
1094 #ifdef CONFIG_NETMAP
1102 printf("Available netdev backend types:\n");
1103 for (idx = 0; idx < ARRAY_SIZE(available_netdevs); idx++) {
1104 puts(available_netdevs[idx]);
1108 static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp)
1110 gchar **substrings = NULL;
1111 void *object = NULL;
1114 Visitor *v = opts_visitor_new(opts);
1116 const char *type = qemu_opt_get(opts, "type");
1118 if (is_netdev && type && is_help_option(type)) {
1122 /* Parse convenience option format ip6-net=fec0::0[/64] */
1123 const char *ip6_net = qemu_opt_get(opts, "ipv6-net");
1127 unsigned long prefix_len = 64; /* Default 64bit prefix length. */
1129 substrings = g_strsplit(ip6_net, "/", 2);
1130 if (!substrings || !substrings[0]) {
1131 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "ipv6-net",
1132 "a valid IPv6 prefix");
1136 prefix_addr = substrings[0];
1138 /* Handle user-specified prefix length. */
1139 if (substrings[1] &&
1140 qemu_strtoul(substrings[1], NULL, 10, &prefix_len))
1142 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
1143 "ipv6-prefixlen", "a number");
1147 qemu_opt_set(opts, "ipv6-prefix", prefix_addr, &error_abort);
1148 qemu_opt_set_number(opts, "ipv6-prefixlen", prefix_len,
1150 qemu_opt_unset(opts, "ipv6-net");
1155 visit_type_Netdev(v, NULL, (Netdev **)&object, &err);
1157 visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err);
1161 ret = net_client_init1(object, is_netdev, &err);
1165 qapi_free_Netdev(object);
1167 qapi_free_NetLegacy(object);
1171 error_propagate(errp, err);
1172 g_strfreev(substrings);
1177 void netdev_add(QemuOpts *opts, Error **errp)
1179 net_client_init(opts, true, errp);
1182 void qmp_netdev_add(Netdev *netdev, Error **errp)
1184 net_client_init1(netdev, true, errp);
1187 void qmp_netdev_del(const char *id, Error **errp)
1191 nc = qemu_find_netdev(id);
1193 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1194 "Device '%s' not found", id);
1198 if (!nc->is_netdev) {
1199 error_setg(errp, "Device '%s' is not a netdev", id);
1203 qemu_del_net_client(nc);
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 colo_notify_filters_event(int event, Error **errp)
1338 NetFilterClass *nfc = NULL;
1339 Error *local_err = NULL;
1341 QTAILQ_FOREACH(nc, &net_clients, next) {
1342 QTAILQ_FOREACH(nf, &nc->filters, next) {
1343 nfc = NETFILTER_GET_CLASS(OBJECT(nf));
1344 nfc->handle_event(nf, event, &local_err);
1346 error_propagate(errp, local_err);
1353 void qmp_set_link(const char *name, bool up, Error **errp)
1355 NetClientState *ncs[MAX_QUEUE_NUM];
1359 queues = qemu_find_net_clients_except(name, ncs,
1360 NET_CLIENT_DRIVER__MAX,
1364 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1365 "Device '%s' not found", name);
1370 for (i = 0; i < queues; i++) {
1371 ncs[i]->link_down = !up;
1374 if (nc->info->link_status_changed) {
1375 nc->info->link_status_changed(nc);
1379 /* Change peer link only if the peer is NIC and then notify peer.
1380 * If the peer is a HUBPORT or a backend, we do not change the
1383 * This behavior is compatible with qemu hubs where there could be
1384 * multiple clients that can still communicate with each other in
1385 * disconnected mode. For now maintain this compatibility.
1387 if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
1388 for (i = 0; i < queues; i++) {
1389 ncs[i]->peer->link_down = !up;
1392 if (nc->peer->info->link_status_changed) {
1393 nc->peer->info->link_status_changed(nc->peer);
1398 static void net_vm_change_state_handler(void *opaque, int running,
1402 NetClientState *tmp;
1404 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
1406 /* Flush queued packets and wake up backends. */
1407 if (nc->peer && qemu_can_send_packet(nc)) {
1408 qemu_flush_queued_packets(nc->peer);
1411 /* Complete all queued packets, to guarantee we don't modify
1412 * state later when VM is not running.
1414 qemu_flush_or_purge_queued_packets(nc, true);
1419 void net_cleanup(void)
1423 /* We may del multiple entries during qemu_del_net_client(),
1424 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1426 while (!QTAILQ_EMPTY(&net_clients)) {
1427 nc = QTAILQ_FIRST(&net_clients);
1428 if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
1429 qemu_del_nic(qemu_get_nic(nc));
1431 qemu_del_net_client(nc);
1435 qemu_del_vm_change_state_handler(net_change_state_entry);
1438 void net_check_clients(void)
1443 net_hub_check_clients();
1445 QTAILQ_FOREACH(nc, &net_clients, next) {
1447 warn_report("%s %s has no peer",
1448 nc->info->type == NET_CLIENT_DRIVER_NIC
1454 /* Check that all NICs requested via -net nic actually got created.
1455 * NICs created via -device don't need to be checked here because
1456 * they are always instantiated.
1458 for (i = 0; i < MAX_NICS; i++) {
1459 NICInfo *nd = &nd_table[i];
1460 if (nd->used && !nd->instantiated) {
1461 warn_report("requested NIC (%s, model %s) "
1462 "was not created (not supported by this machine?)",
1463 nd->name ? nd->name : "anonymous",
1464 nd->model ? nd->model : "unspecified");
1469 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp)
1471 return net_client_init(opts, false, errp);
1474 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp)
1476 return net_client_init(opts, true, errp);
1479 /* For the convenience "--nic" parameter */
1480 static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp)
1487 type = qemu_opt_get(opts, "type");
1488 if (type && g_str_equal(type, "none")) {
1489 return 0; /* Nothing to do, default_net is cleared in vl.c */
1492 idx = nic_get_free_idx();
1493 if (idx == -1 || nb_nics >= MAX_NICS) {
1494 error_setg(errp, "no more on-board/default NIC slots available");
1499 qemu_opt_set(opts, "type", "user", &error_abort);
1502 ni = &nd_table[idx];
1503 memset(ni, 0, sizeof(*ni));
1504 ni->model = qemu_opt_get_del(opts, "model");
1506 /* Create an ID if the user did not specify one */
1507 nd_id = g_strdup(qemu_opts_id(opts));
1509 nd_id = g_strdup_printf("__org.qemu.nic%i", idx);
1510 qemu_opts_set_id(opts, nd_id);
1513 /* Handle MAC address */
1514 mac = qemu_opt_get_del(opts, "mac");
1516 ret = net_parse_macaddr(ni->macaddr.a, mac);
1519 error_setg(errp, "invalid syntax for ethernet address");
1522 if (is_multicast_ether_addr(ni->macaddr.a)) {
1523 error_setg(errp, "NIC cannot have multicast MAC address");
1528 qemu_macaddr_default_if_unset(&ni->macaddr);
1530 ret = net_client_init(opts, true, errp);
1532 ni->netdev = qemu_find_netdev(nd_id);
1542 int net_init_clients(Error **errp)
1544 net_change_state_entry =
1545 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
1547 QTAILQ_INIT(&net_clients);
1549 if (qemu_opts_foreach(qemu_find_opts("netdev"),
1550 net_init_netdev, NULL, errp)) {
1554 if (qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL, errp)) {
1558 if (qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL, errp)) {
1565 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1567 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) {
1576 uint32_t net_crc32(const uint8_t *p, int len)
1583 for (i = 0; i < len; i++) {
1585 for (j = 0; j < 8; j++) {
1586 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1590 crc = ((crc ^ POLYNOMIAL_BE) | carry);
1598 uint32_t net_crc32_le(const uint8_t *p, int len)
1605 for (i = 0; i < len; i++) {
1607 for (j = 0; j < 8; j++) {
1608 carry = (crc & 0x1) ^ (b & 0x01);
1612 crc ^= POLYNOMIAL_LE;
1620 QemuOptsList qemu_netdev_opts = {
1622 .implied_opt_name = "type",
1623 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1626 * no elements => accept any params
1627 * validation will happen later
1629 { /* end of list */ }
1633 QemuOptsList qemu_nic_opts = {
1635 .implied_opt_name = "type",
1636 .head = QTAILQ_HEAD_INITIALIZER(qemu_nic_opts.head),
1639 * no elements => accept any params
1640 * validation will happen later
1642 { /* end of list */ }
1646 QemuOptsList qemu_net_opts = {
1648 .implied_opt_name = "type",
1649 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1652 * no elements => accept any params
1653 * validation will happen later
1655 { /* end of list */ }
1659 void net_socket_rs_init(SocketReadState *rs,
1660 SocketReadStateFinalize *finalize,
1664 rs->vnet_hdr = vnet_hdr;
1667 rs->vnet_hdr_len = 0;
1668 memset(rs->buf, 0, sizeof(rs->buf));
1669 rs->finalize = finalize;
1677 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size)
1682 /* Reassemble a packet from the network.
1683 * 0 = getting length.
1684 * 1 = getting vnet header length.
1687 switch (rs->state) {
1693 memcpy(rs->buf + rs->index, buf, l);
1697 if (rs->index == 4) {
1699 rs->packet_len = ntohl(*(uint32_t *)rs->buf);
1705 rs->vnet_hdr_len = 0;
1714 memcpy(rs->buf + rs->index, buf, l);
1718 if (rs->index == 4) {
1719 /* got vnet header length */
1720 rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf);
1726 l = rs->packet_len - rs->index;
1730 if (rs->index + l <= sizeof(rs->buf)) {
1731 memcpy(rs->buf + rs->index, buf, l);
1733 fprintf(stderr, "serious error: oversized packet received,"
1734 "connection terminated.\n");
1735 rs->index = rs->state = 0;
1742 if (rs->index >= rs->packet_len) {
1745 assert(rs->finalize);