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 NetClientState *qemu_get_peer(NetClientState *nc, int queue_index)
331 NetClientState *ncs = nc + queue_index;
335 static void qemu_cleanup_net_client(NetClientState *nc)
337 QTAILQ_REMOVE(&net_clients, nc, next);
339 if (nc->info->cleanup) {
340 nc->info->cleanup(nc);
344 static void qemu_free_net_client(NetClientState *nc)
346 if (nc->incoming_queue) {
347 qemu_del_net_queue(nc->incoming_queue);
350 nc->peer->peer = NULL;
354 if (nc->destructor) {
359 void qemu_del_net_client(NetClientState *nc)
361 NetClientState *ncs[MAX_QUEUE_NUM];
363 NetFilterState *nf, *next;
365 assert(nc->info->type != NET_CLIENT_DRIVER_NIC);
367 /* If the NetClientState belongs to a multiqueue backend, we will change all
368 * other NetClientStates also.
370 queues = qemu_find_net_clients_except(nc->name, ncs,
371 NET_CLIENT_DRIVER_NIC,
375 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) {
376 object_unparent(OBJECT(nf));
379 /* If there is a peer NIC, delete and cleanup client, but do not free. */
380 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
381 NICState *nic = qemu_get_nic(nc->peer);
382 if (nic->peer_deleted) {
385 nic->peer_deleted = true;
387 for (i = 0; i < queues; i++) {
388 ncs[i]->peer->link_down = true;
391 if (nc->peer->info->link_status_changed) {
392 nc->peer->info->link_status_changed(nc->peer);
395 for (i = 0; i < queues; i++) {
396 qemu_cleanup_net_client(ncs[i]);
402 for (i = 0; i < queues; i++) {
403 qemu_cleanup_net_client(ncs[i]);
404 qemu_free_net_client(ncs[i]);
408 void qemu_del_nic(NICState *nic)
410 int i, queues = MAX(nic->conf->peers.queues, 1);
412 qemu_macaddr_set_free(&nic->conf->macaddr);
414 /* If this is a peer NIC and peer has already been deleted, free it now. */
415 if (nic->peer_deleted) {
416 for (i = 0; i < queues; i++) {
417 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
421 for (i = queues - 1; i >= 0; i--) {
422 NetClientState *nc = qemu_get_subqueue(nic, i);
424 qemu_cleanup_net_client(nc);
425 qemu_free_net_client(nc);
431 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
435 QTAILQ_FOREACH(nc, &net_clients, next) {
436 if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
437 if (nc->queue_index == 0) {
438 func(qemu_get_nic(nc), opaque);
444 bool qemu_has_ufo(NetClientState *nc)
446 if (!nc || !nc->info->has_ufo) {
450 return nc->info->has_ufo(nc);
453 bool qemu_has_vnet_hdr(NetClientState *nc)
455 if (!nc || !nc->info->has_vnet_hdr) {
459 return nc->info->has_vnet_hdr(nc);
462 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
464 if (!nc || !nc->info->has_vnet_hdr_len) {
468 return nc->info->has_vnet_hdr_len(nc, len);
471 void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
473 if (!nc || !nc->info->using_vnet_hdr) {
477 nc->info->using_vnet_hdr(nc, enable);
480 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
483 if (!nc || !nc->info->set_offload) {
487 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
490 void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
492 if (!nc || !nc->info->set_vnet_hdr_len) {
496 nc->vnet_hdr_len = len;
497 nc->info->set_vnet_hdr_len(nc, len);
500 int qemu_set_vnet_le(NetClientState *nc, bool is_le)
502 #ifdef HOST_WORDS_BIGENDIAN
503 if (!nc || !nc->info->set_vnet_le) {
507 return nc->info->set_vnet_le(nc, is_le);
513 int qemu_set_vnet_be(NetClientState *nc, bool is_be)
515 #ifdef HOST_WORDS_BIGENDIAN
518 if (!nc || !nc->info->set_vnet_be) {
522 return nc->info->set_vnet_be(nc, is_be);
526 int qemu_can_send_packet(NetClientState *sender)
528 int vm_running = runstate_is_running();
538 if (sender->peer->receive_disabled) {
540 } else if (sender->peer->info->can_receive &&
541 !sender->peer->info->can_receive(sender->peer)) {
547 static ssize_t filter_receive_iov(NetClientState *nc,
548 NetFilterDirection direction,
549 NetClientState *sender,
551 const struct iovec *iov,
553 NetPacketSent *sent_cb)
556 NetFilterState *nf = NULL;
558 if (direction == NET_FILTER_DIRECTION_TX) {
559 QTAILQ_FOREACH(nf, &nc->filters, next) {
560 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
567 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, next) {
568 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
579 static ssize_t filter_receive(NetClientState *nc,
580 NetFilterDirection direction,
581 NetClientState *sender,
585 NetPacketSent *sent_cb)
588 .iov_base = (void *)data,
592 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb);
595 void qemu_purge_queued_packets(NetClientState *nc)
601 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
604 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge)
606 nc->receive_disabled = 0;
608 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_HUBPORT) {
609 if (net_hub_flush(nc->peer)) {
613 if (qemu_net_queue_flush(nc->incoming_queue)) {
614 /* We emptied the queue successfully, signal to the IO thread to repoll
615 * the file descriptor (for tap, for example).
619 /* Unable to empty the queue, purge remaining packets */
620 qemu_net_queue_purge(nc->incoming_queue, nc->peer);
624 void qemu_flush_queued_packets(NetClientState *nc)
626 qemu_flush_or_purge_queued_packets(nc, false);
629 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
631 const uint8_t *buf, int size,
632 NetPacketSent *sent_cb)
638 printf("qemu_send_packet_async:\n");
639 qemu_hexdump(stdout, "net", buf, size);
642 if (sender->link_down || !sender->peer) {
646 /* Let filters handle the packet first */
647 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX,
648 sender, flags, buf, size, sent_cb);
653 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX,
654 sender, flags, buf, size, sent_cb);
659 queue = sender->peer->incoming_queue;
661 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
664 ssize_t qemu_send_packet_async(NetClientState *sender,
665 const uint8_t *buf, int size,
666 NetPacketSent *sent_cb)
668 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
672 ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
674 return qemu_send_packet_async(nc, buf, size, NULL);
677 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
679 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
683 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
684 int iovcnt, unsigned flags)
692 buffer = iov[0].iov_base;
693 offset = iov[0].iov_len;
695 offset = iov_size(iov, iovcnt);
696 if (offset > NET_BUFSIZE) {
699 buf = g_malloc(offset);
701 offset = iov_to_buf(iov, iovcnt, 0, buf, offset);
704 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
705 ret = nc->info->receive_raw(nc, buffer, offset);
707 ret = nc->info->receive(nc, buffer, offset);
714 static ssize_t qemu_deliver_packet_iov(NetClientState *sender,
716 const struct iovec *iov,
720 NetClientState *nc = opaque;
725 return iov_size(iov, iovcnt);
728 if (nc->receive_disabled) {
732 if (nc->info->receive_iov && !(flags & QEMU_NET_PACKET_FLAG_RAW)) {
733 ret = nc->info->receive_iov(nc, iov, iovcnt);
735 ret = nc_sendv_compat(nc, iov, iovcnt, flags);
739 nc->receive_disabled = 1;
745 ssize_t qemu_sendv_packet_async(NetClientState *sender,
746 const struct iovec *iov, int iovcnt,
747 NetPacketSent *sent_cb)
750 size_t size = iov_size(iov, iovcnt);
753 if (size > NET_BUFSIZE) {
757 if (sender->link_down || !sender->peer) {
761 /* Let filters handle the packet first */
762 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender,
763 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb);
768 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender,
769 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb);
774 queue = sender->peer->incoming_queue;
776 return qemu_net_queue_send_iov(queue, sender,
777 QEMU_NET_PACKET_FLAG_NONE,
778 iov, iovcnt, sent_cb);
782 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
784 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
787 NetClientState *qemu_find_netdev(const char *id)
791 QTAILQ_FOREACH(nc, &net_clients, next) {
792 if (nc->info->type == NET_CLIENT_DRIVER_NIC)
794 if (!strcmp(nc->name, id)) {
802 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
803 NetClientDriver type, int max)
808 QTAILQ_FOREACH(nc, &net_clients, next) {
809 if (nc->info->type == type) {
812 if (!id || !strcmp(nc->name, id)) {
823 static int nic_get_free_idx(void)
827 for (index = 0; index < MAX_NICS; index++)
828 if (!nd_table[index].used)
833 int qemu_show_nic_models(const char *arg, const char *const *models)
837 if (!arg || !is_help_option(arg)) {
841 printf("Supported NIC models:\n");
842 for (i = 0 ; models[i]; i++) {
843 printf("%s\n", models[i]);
848 void qemu_check_nic_model(NICInfo *nd, const char *model)
850 const char *models[2];
855 if (qemu_show_nic_models(nd->model, models))
857 if (qemu_find_nic_model(nd, models, model) < 0)
861 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
862 const char *default_model)
867 nd->model = g_strdup(default_model);
869 for (i = 0 ; models[i]; i++) {
870 if (strcmp(nd->model, models[i]) == 0)
874 error_report("Unsupported NIC model: %s", nd->model);
878 static int net_init_nic(const Netdev *netdev, const char *name,
879 NetClientState *peer, Error **errp)
883 const NetLegacyNicOptions *nic;
885 assert(netdev->type == NET_CLIENT_DRIVER_NIC);
886 nic = &netdev->u.nic;
888 idx = nic_get_free_idx();
889 if (idx == -1 || nb_nics >= MAX_NICS) {
890 error_setg(errp, "too many NICs");
896 memset(nd, 0, sizeof(*nd));
898 if (nic->has_netdev) {
899 nd->netdev = qemu_find_netdev(nic->netdev);
901 error_setg(errp, "netdev '%s' not found", nic->netdev);
908 nd->name = g_strdup(name);
909 if (nic->has_model) {
910 nd->model = g_strdup(nic->model);
913 nd->devaddr = g_strdup(nic->addr);
916 if (nic->has_macaddr &&
917 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
918 error_setg(errp, "invalid syntax for ethernet address");
921 if (nic->has_macaddr &&
922 is_multicast_ether_addr(nd->macaddr.a)) {
924 "NIC cannot have multicast MAC address (odd 1st byte)");
927 qemu_macaddr_default_if_unset(&nd->macaddr);
929 if (nic->has_vectors) {
930 if (nic->vectors > 0x7ffffff) {
931 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors);
934 nd->nvectors = nic->vectors;
936 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
946 static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])(
947 const Netdev *netdev,
949 NetClientState *peer, Error **errp) = {
950 [NET_CLIENT_DRIVER_NIC] = net_init_nic,
952 [NET_CLIENT_DRIVER_USER] = net_init_slirp,
954 [NET_CLIENT_DRIVER_TAP] = net_init_tap,
955 [NET_CLIENT_DRIVER_SOCKET] = net_init_socket,
957 [NET_CLIENT_DRIVER_VDE] = net_init_vde,
960 [NET_CLIENT_DRIVER_NETMAP] = net_init_netmap,
962 #ifdef CONFIG_NET_BRIDGE
963 [NET_CLIENT_DRIVER_BRIDGE] = net_init_bridge,
965 [NET_CLIENT_DRIVER_HUBPORT] = net_init_hubport,
966 #ifdef CONFIG_VHOST_NET_USER
967 [NET_CLIENT_DRIVER_VHOST_USER] = net_init_vhost_user,
969 #ifdef CONFIG_VHOST_NET_VDPA
970 [NET_CLIENT_DRIVER_VHOST_VDPA] = net_init_vhost_vdpa,
973 [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3,
978 static int net_client_init1(const Netdev *netdev, bool is_netdev, Error **errp)
980 NetClientState *peer = NULL;
983 if (netdev->type == NET_CLIENT_DRIVER_NIC ||
984 !net_client_init_fun[netdev->type]) {
985 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
986 "a netdev backend type");
990 if (netdev->type == NET_CLIENT_DRIVER_NONE) {
991 return 0; /* nothing to do */
993 if (netdev->type == NET_CLIENT_DRIVER_HUBPORT ||
994 !net_client_init_fun[netdev->type]) {
995 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
996 "a net backend type (maybe it is not compiled "
997 "into this binary)");
1001 /* Do not add to a hub if it's a nic with a netdev= parameter. */
1002 if (netdev->type != NET_CLIENT_DRIVER_NIC ||
1003 !netdev->u.nic.has_netdev) {
1004 peer = net_hub_add_port(0, NULL, NULL);
1008 if (net_client_init_fun[netdev->type](netdev, netdev->id, peer, errp) < 0) {
1009 /* FIXME drop when all init functions store an Error */
1010 if (errp && !*errp) {
1011 error_setg(errp, QERR_DEVICE_INIT_FAILED,
1012 NetClientDriver_str(netdev->type));
1020 nc = qemu_find_netdev(netdev->id);
1022 nc->is_netdev = true;
1028 static void show_netdevs(void)
1031 const char *available_netdevs[] = {
1038 #ifdef CONFIG_L2TPV3
1044 #ifdef CONFIG_NET_BRIDGE
1047 #ifdef CONFIG_NETMAP
1055 printf("Available netdev backend types:\n");
1056 for (idx = 0; idx < ARRAY_SIZE(available_netdevs); idx++) {
1057 puts(available_netdevs[idx]);
1061 static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp)
1063 gchar **substrings = NULL;
1064 Netdev *object = NULL;
1066 Visitor *v = opts_visitor_new(opts);
1068 const char *type = qemu_opt_get(opts, "type");
1070 if (is_netdev && type && is_help_option(type)) {
1074 /* Parse convenience option format ip6-net=fec0::0[/64] */
1075 const char *ip6_net = qemu_opt_get(opts, "ipv6-net");
1079 unsigned long prefix_len = 64; /* Default 64bit prefix length. */
1081 substrings = g_strsplit(ip6_net, "/", 2);
1082 if (!substrings || !substrings[0]) {
1083 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "ipv6-net",
1084 "a valid IPv6 prefix");
1088 prefix_addr = substrings[0];
1090 /* Handle user-specified prefix length. */
1091 if (substrings[1] &&
1092 qemu_strtoul(substrings[1], NULL, 10, &prefix_len))
1094 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
1095 "ipv6-prefixlen", "a number");
1099 qemu_opt_set(opts, "ipv6-prefix", prefix_addr, &error_abort);
1100 qemu_opt_set_number(opts, "ipv6-prefixlen", prefix_len,
1102 qemu_opt_unset(opts, "ipv6-net");
1106 /* Create an ID for -net if the user did not specify one */
1107 if (!is_netdev && !qemu_opts_id(opts)) {
1109 qemu_opts_set_id(opts, g_strdup_printf("__org.qemu.net%i", idx++));
1112 if (visit_type_Netdev(v, NULL, &object, errp)) {
1113 ret = net_client_init1(object, is_netdev, errp);
1116 qapi_free_Netdev(object);
1119 g_strfreev(substrings);
1124 void netdev_add(QemuOpts *opts, Error **errp)
1126 net_client_init(opts, true, errp);
1129 void qmp_netdev_add(Netdev *netdev, Error **errp)
1131 net_client_init1(netdev, true, errp);
1134 void qmp_netdev_del(const char *id, Error **errp)
1138 nc = qemu_find_netdev(id);
1140 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1141 "Device '%s' not found", id);
1145 if (!nc->is_netdev) {
1146 error_setg(errp, "Device '%s' is not a netdev", id);
1150 qemu_del_net_client(nc);
1153 static void netfilter_print_info(Monitor *mon, NetFilterState *nf)
1156 ObjectProperty *prop;
1157 ObjectPropertyIterator iter;
1160 /* generate info str */
1161 object_property_iter_init(&iter, OBJECT(nf));
1162 while ((prop = object_property_iter_next(&iter))) {
1163 if (!strcmp(prop->name, "type")) {
1166 v = string_output_visitor_new(false, &str);
1167 object_property_get(OBJECT(nf), prop->name, v, NULL);
1168 visit_complete(v, &str);
1170 monitor_printf(mon, ",%s=%s", prop->name, str);
1173 monitor_printf(mon, "\n");
1176 void print_net_client(Monitor *mon, NetClientState *nc)
1180 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
1182 NetClientDriver_str(nc->info->type),
1184 if (!QTAILQ_EMPTY(&nc->filters)) {
1185 monitor_printf(mon, "filters:\n");
1187 QTAILQ_FOREACH(nf, &nc->filters, next) {
1188 monitor_printf(mon, " - %s: type=%s",
1189 object_get_canonical_path_component(OBJECT(nf)),
1190 object_get_typename(OBJECT(nf)));
1191 netfilter_print_info(mon, nf);
1195 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
1199 RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
1201 QTAILQ_FOREACH(nc, &net_clients, next) {
1202 RxFilterInfoList *entry;
1205 if (has_name && strcmp(nc->name, name) != 0) {
1209 /* only query rx-filter information of NIC */
1210 if (nc->info->type != NET_CLIENT_DRIVER_NIC) {
1212 error_setg(errp, "net client(%s) isn't a NIC", name);
1218 /* only query information on queue 0 since the info is per nic,
1221 if (nc->queue_index != 0)
1224 if (nc->info->query_rx_filter) {
1225 info = nc->info->query_rx_filter(nc);
1226 entry = g_malloc0(sizeof(*entry));
1227 entry->value = info;
1230 filter_list = entry;
1232 last_entry->next = entry;
1235 } else if (has_name) {
1236 error_setg(errp, "net client(%s) doesn't support"
1237 " rx-filter querying", name);
1246 if (filter_list == NULL && has_name) {
1247 error_setg(errp, "invalid net client name: %s", name);
1253 void hmp_info_network(Monitor *mon, const QDict *qdict)
1255 NetClientState *nc, *peer;
1256 NetClientDriver type;
1260 QTAILQ_FOREACH(nc, &net_clients, next) {
1262 type = nc->info->type;
1264 /* Skip if already printed in hub info */
1265 if (net_hub_id_for_client(nc, NULL) == 0) {
1269 if (!peer || type == NET_CLIENT_DRIVER_NIC) {
1270 print_net_client(mon, nc);
1271 } /* else it's a netdev connected to a NIC, printed with the NIC */
1272 if (peer && type == NET_CLIENT_DRIVER_NIC) {
1273 monitor_printf(mon, " \\ ");
1274 print_net_client(mon, peer);
1279 void colo_notify_filters_event(int event, Error **errp)
1283 NetFilterClass *nfc = NULL;
1284 Error *local_err = NULL;
1286 QTAILQ_FOREACH(nc, &net_clients, next) {
1287 QTAILQ_FOREACH(nf, &nc->filters, next) {
1288 nfc = NETFILTER_GET_CLASS(OBJECT(nf));
1289 nfc->handle_event(nf, event, &local_err);
1291 error_propagate(errp, local_err);
1298 void qmp_set_link(const char *name, bool up, Error **errp)
1300 NetClientState *ncs[MAX_QUEUE_NUM];
1304 queues = qemu_find_net_clients_except(name, ncs,
1305 NET_CLIENT_DRIVER__MAX,
1309 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1310 "Device '%s' not found", name);
1315 for (i = 0; i < queues; i++) {
1316 ncs[i]->link_down = !up;
1319 if (nc->info->link_status_changed) {
1320 nc->info->link_status_changed(nc);
1324 /* Change peer link only if the peer is NIC and then notify peer.
1325 * If the peer is a HUBPORT or a backend, we do not change the
1328 * This behavior is compatible with qemu hubs where there could be
1329 * multiple clients that can still communicate with each other in
1330 * disconnected mode. For now maintain this compatibility.
1332 if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) {
1333 for (i = 0; i < queues; i++) {
1334 ncs[i]->peer->link_down = !up;
1337 if (nc->peer->info->link_status_changed) {
1338 nc->peer->info->link_status_changed(nc->peer);
1343 static void net_vm_change_state_handler(void *opaque, int running,
1347 NetClientState *tmp;
1349 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
1351 /* Flush queued packets and wake up backends. */
1352 if (nc->peer && qemu_can_send_packet(nc)) {
1353 qemu_flush_queued_packets(nc->peer);
1356 /* Complete all queued packets, to guarantee we don't modify
1357 * state later when VM is not running.
1359 qemu_flush_or_purge_queued_packets(nc, true);
1364 void net_cleanup(void)
1368 /* We may del multiple entries during qemu_del_net_client(),
1369 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1371 while (!QTAILQ_EMPTY(&net_clients)) {
1372 nc = QTAILQ_FIRST(&net_clients);
1373 if (nc->info->type == NET_CLIENT_DRIVER_NIC) {
1374 qemu_del_nic(qemu_get_nic(nc));
1376 qemu_del_net_client(nc);
1380 qemu_del_vm_change_state_handler(net_change_state_entry);
1383 void net_check_clients(void)
1388 net_hub_check_clients();
1390 QTAILQ_FOREACH(nc, &net_clients, next) {
1392 warn_report("%s %s has no peer",
1393 nc->info->type == NET_CLIENT_DRIVER_NIC
1399 /* Check that all NICs requested via -net nic actually got created.
1400 * NICs created via -device don't need to be checked here because
1401 * they are always instantiated.
1403 for (i = 0; i < MAX_NICS; i++) {
1404 NICInfo *nd = &nd_table[i];
1405 if (nd->used && !nd->instantiated) {
1406 warn_report("requested NIC (%s, model %s) "
1407 "was not created (not supported by this machine?)",
1408 nd->name ? nd->name : "anonymous",
1409 nd->model ? nd->model : "unspecified");
1414 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp)
1416 return net_client_init(opts, false, errp);
1419 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp)
1421 return net_client_init(opts, true, errp);
1424 /* For the convenience "--nic" parameter */
1425 static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp)
1432 type = qemu_opt_get(opts, "type");
1433 if (type && g_str_equal(type, "none")) {
1434 return 0; /* Nothing to do, default_net is cleared in vl.c */
1437 idx = nic_get_free_idx();
1438 if (idx == -1 || nb_nics >= MAX_NICS) {
1439 error_setg(errp, "no more on-board/default NIC slots available");
1444 qemu_opt_set(opts, "type", "user", &error_abort);
1447 ni = &nd_table[idx];
1448 memset(ni, 0, sizeof(*ni));
1449 ni->model = qemu_opt_get_del(opts, "model");
1451 /* Create an ID if the user did not specify one */
1452 nd_id = g_strdup(qemu_opts_id(opts));
1454 nd_id = g_strdup_printf("__org.qemu.nic%i", idx);
1455 qemu_opts_set_id(opts, nd_id);
1458 /* Handle MAC address */
1459 mac = qemu_opt_get_del(opts, "mac");
1461 ret = net_parse_macaddr(ni->macaddr.a, mac);
1464 error_setg(errp, "invalid syntax for ethernet address");
1467 if (is_multicast_ether_addr(ni->macaddr.a)) {
1468 error_setg(errp, "NIC cannot have multicast MAC address");
1473 qemu_macaddr_default_if_unset(&ni->macaddr);
1475 ret = net_client_init(opts, true, errp);
1477 ni->netdev = qemu_find_netdev(nd_id);
1487 int net_init_clients(Error **errp)
1489 net_change_state_entry =
1490 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
1492 QTAILQ_INIT(&net_clients);
1494 if (qemu_opts_foreach(qemu_find_opts("netdev"),
1495 net_init_netdev, NULL, errp)) {
1499 if (qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL, errp)) {
1503 if (qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL, errp)) {
1510 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1512 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) {
1521 uint32_t net_crc32(const uint8_t *p, int len)
1528 for (i = 0; i < len; i++) {
1530 for (j = 0; j < 8; j++) {
1531 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1535 crc = ((crc ^ POLYNOMIAL_BE) | carry);
1543 uint32_t net_crc32_le(const uint8_t *p, int len)
1550 for (i = 0; i < len; i++) {
1552 for (j = 0; j < 8; j++) {
1553 carry = (crc & 0x1) ^ (b & 0x01);
1557 crc ^= POLYNOMIAL_LE;
1565 QemuOptsList qemu_netdev_opts = {
1567 .implied_opt_name = "type",
1568 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1571 * no elements => accept any params
1572 * validation will happen later
1574 { /* end of list */ }
1578 QemuOptsList qemu_nic_opts = {
1580 .implied_opt_name = "type",
1581 .head = QTAILQ_HEAD_INITIALIZER(qemu_nic_opts.head),
1584 * no elements => accept any params
1585 * validation will happen later
1587 { /* end of list */ }
1591 QemuOptsList qemu_net_opts = {
1593 .implied_opt_name = "type",
1594 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1597 * no elements => accept any params
1598 * validation will happen later
1600 { /* end of list */ }
1604 void net_socket_rs_init(SocketReadState *rs,
1605 SocketReadStateFinalize *finalize,
1609 rs->vnet_hdr = vnet_hdr;
1612 rs->vnet_hdr_len = 0;
1613 memset(rs->buf, 0, sizeof(rs->buf));
1614 rs->finalize = finalize;
1622 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size)
1627 /* Reassemble a packet from the network.
1628 * 0 = getting length.
1629 * 1 = getting vnet header length.
1632 switch (rs->state) {
1638 memcpy(rs->buf + rs->index, buf, l);
1642 if (rs->index == 4) {
1644 rs->packet_len = ntohl(*(uint32_t *)rs->buf);
1650 rs->vnet_hdr_len = 0;
1659 memcpy(rs->buf + rs->index, buf, l);
1663 if (rs->index == 4) {
1664 /* got vnet header length */
1665 rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf);
1671 l = rs->packet_len - rs->index;
1675 if (rs->index + l <= sizeof(rs->buf)) {
1676 memcpy(rs->buf + rs->index, buf, l);
1678 fprintf(stderr, "serious error: oversized packet received,"
1679 "connection terminated.\n");
1680 rs->index = rs->state = 0;
1687 if (rs->index >= rs->packet_len) {
1690 assert(rs->finalize);