PPC: Fix rldcl
[qemu/agraf.git] / net / net.c
blob43a74e43aeb1b2a080dbc1f850b1673e0c3ba2a7
1 /*
2 * QEMU System Emulator
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
22 * THE SOFTWARE.
24 #include "config-host.h"
26 #include "net/net.h"
27 #include "clients.h"
28 #include "hub.h"
29 #include "net/slirp.h"
30 #include "util.h"
32 #include "monitor/monitor.h"
33 #include "qemu-common.h"
34 #include "qemu/sockets.h"
35 #include "qemu/config-file.h"
36 #include "qmp-commands.h"
37 #include "hw/qdev.h"
38 #include "qemu/iov.h"
39 #include "qapi-visit.h"
40 #include "qapi/opts-visitor.h"
41 #include "qapi/dealloc-visitor.h"
43 /* Net bridge is currently not supported for W32. */
44 #if !defined(_WIN32)
45 # define CONFIG_NET_BRIDGE
46 #endif
48 static QTAILQ_HEAD(, NetClientState) net_clients;
50 int default_net = 1;
52 /***********************************************************/
53 /* network device redirectors */
55 #if defined(DEBUG_NET)
56 static void hex_dump(FILE *f, const uint8_t *buf, int size)
58 int len, i, j, c;
60 for(i=0;i<size;i+=16) {
61 len = size - i;
62 if (len > 16)
63 len = 16;
64 fprintf(f, "%08x ", i);
65 for(j=0;j<16;j++) {
66 if (j < len)
67 fprintf(f, " %02x", buf[i+j]);
68 else
69 fprintf(f, " ");
71 fprintf(f, " ");
72 for(j=0;j<len;j++) {
73 c = buf[i+j];
74 if (c < ' ' || c > '~')
75 c = '.';
76 fprintf(f, "%c", c);
78 fprintf(f, "\n");
81 #endif
83 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
85 const char *p, *p1;
86 int len;
87 p = *pp;
88 p1 = strchr(p, sep);
89 if (!p1)
90 return -1;
91 len = p1 - p;
92 p1++;
93 if (buf_size > 0) {
94 if (len > buf_size - 1)
95 len = buf_size - 1;
96 memcpy(buf, p, len);
97 buf[len] = '\0';
99 *pp = p1;
100 return 0;
103 int parse_host_port(struct sockaddr_in *saddr, const char *str)
105 char buf[512];
106 struct hostent *he;
107 const char *p, *r;
108 int port;
110 p = str;
111 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
112 return -1;
113 saddr->sin_family = AF_INET;
114 if (buf[0] == '\0') {
115 saddr->sin_addr.s_addr = 0;
116 } else {
117 if (qemu_isdigit(buf[0])) {
118 if (!inet_aton(buf, &saddr->sin_addr))
119 return -1;
120 } else {
121 if ((he = gethostbyname(buf)) == NULL)
122 return - 1;
123 saddr->sin_addr = *(struct in_addr *)he->h_addr;
126 port = strtol(p, (char **)&r, 0);
127 if (r == p)
128 return -1;
129 saddr->sin_port = htons(port);
130 return 0;
133 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6])
135 snprintf(nc->info_str, sizeof(nc->info_str),
136 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
137 nc->model,
138 macaddr[0], macaddr[1], macaddr[2],
139 macaddr[3], macaddr[4], macaddr[5]);
142 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
144 static int index = 0;
145 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
147 if (memcmp(macaddr, &zero, sizeof(zero)) != 0)
148 return;
149 macaddr->a[0] = 0x52;
150 macaddr->a[1] = 0x54;
151 macaddr->a[2] = 0x00;
152 macaddr->a[3] = 0x12;
153 macaddr->a[4] = 0x34;
154 macaddr->a[5] = 0x56 + index++;
158 * Generate a name for net client
160 * Only net clients created with the legacy -net option and NICs need this.
162 static char *assign_name(NetClientState *nc1, const char *model)
164 NetClientState *nc;
165 char buf[256];
166 int id = 0;
168 QTAILQ_FOREACH(nc, &net_clients, next) {
169 if (nc == nc1) {
170 continue;
172 if (strcmp(nc->model, model) == 0) {
173 id++;
177 snprintf(buf, sizeof(buf), "%s.%d", model, id);
179 return g_strdup(buf);
182 static void qemu_net_client_destructor(NetClientState *nc)
184 g_free(nc);
187 static void qemu_net_client_setup(NetClientState *nc,
188 NetClientInfo *info,
189 NetClientState *peer,
190 const char *model,
191 const char *name,
192 NetClientDestructor *destructor)
194 nc->info = info;
195 nc->model = g_strdup(model);
196 if (name) {
197 nc->name = g_strdup(name);
198 } else {
199 nc->name = assign_name(nc, model);
202 if (peer) {
203 assert(!peer->peer);
204 nc->peer = peer;
205 peer->peer = nc;
207 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
209 nc->send_queue = qemu_new_net_queue(nc);
210 nc->destructor = destructor;
213 NetClientState *qemu_new_net_client(NetClientInfo *info,
214 NetClientState *peer,
215 const char *model,
216 const char *name)
218 NetClientState *nc;
220 assert(info->size >= sizeof(NetClientState));
222 nc = g_malloc0(info->size);
223 qemu_net_client_setup(nc, info, peer, model, name,
224 qemu_net_client_destructor);
226 return nc;
229 NICState *qemu_new_nic(NetClientInfo *info,
230 NICConf *conf,
231 const char *model,
232 const char *name,
233 void *opaque)
235 NetClientState **peers = conf->peers.ncs;
236 NICState *nic;
237 int i, queues = MAX(1, conf->queues);
239 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
240 assert(info->size >= sizeof(NICState));
242 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
243 nic->ncs = (void *)nic + info->size;
244 nic->conf = conf;
245 nic->opaque = opaque;
247 for (i = 0; i < queues; i++) {
248 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
249 NULL);
250 nic->ncs[i].queue_index = i;
253 return nic;
256 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
258 return nic->ncs + queue_index;
261 NetClientState *qemu_get_queue(NICState *nic)
263 return qemu_get_subqueue(nic, 0);
266 NICState *qemu_get_nic(NetClientState *nc)
268 NetClientState *nc0 = nc - nc->queue_index;
270 return (NICState *)((void *)nc0 - nc->info->size);
273 void *qemu_get_nic_opaque(NetClientState *nc)
275 NICState *nic = qemu_get_nic(nc);
277 return nic->opaque;
280 static void qemu_cleanup_net_client(NetClientState *nc)
282 QTAILQ_REMOVE(&net_clients, nc, next);
284 if (nc->info->cleanup) {
285 nc->info->cleanup(nc);
289 static void qemu_free_net_client(NetClientState *nc)
291 if (nc->send_queue) {
292 qemu_del_net_queue(nc->send_queue);
294 if (nc->peer) {
295 nc->peer->peer = NULL;
297 g_free(nc->name);
298 g_free(nc->model);
299 if (nc->destructor) {
300 nc->destructor(nc);
304 void qemu_del_net_client(NetClientState *nc)
306 NetClientState *ncs[MAX_QUEUE_NUM];
307 int queues, i;
309 /* If the NetClientState belongs to a multiqueue backend, we will change all
310 * other NetClientStates also.
312 queues = qemu_find_net_clients_except(nc->name, ncs,
313 NET_CLIENT_OPTIONS_KIND_NIC,
314 MAX_QUEUE_NUM);
315 assert(queues != 0);
317 /* If there is a peer NIC, delete and cleanup client, but do not free. */
318 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
319 NICState *nic = qemu_get_nic(nc->peer);
320 if (nic->peer_deleted) {
321 return;
323 nic->peer_deleted = true;
325 for (i = 0; i < queues; i++) {
326 ncs[i]->peer->link_down = true;
329 if (nc->peer->info->link_status_changed) {
330 nc->peer->info->link_status_changed(nc->peer);
333 for (i = 0; i < queues; i++) {
334 qemu_cleanup_net_client(ncs[i]);
337 return;
340 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
342 for (i = 0; i < queues; i++) {
343 qemu_cleanup_net_client(ncs[i]);
344 qemu_free_net_client(ncs[i]);
348 void qemu_del_nic(NICState *nic)
350 int i, queues = MAX(nic->conf->queues, 1);
352 /* If this is a peer NIC and peer has already been deleted, free it now. */
353 if (nic->peer_deleted) {
354 for (i = 0; i < queues; i++) {
355 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
359 for (i = queues - 1; i >= 0; i--) {
360 NetClientState *nc = qemu_get_subqueue(nic, i);
362 qemu_cleanup_net_client(nc);
363 qemu_free_net_client(nc);
366 g_free(nic);
369 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
371 NetClientState *nc;
373 QTAILQ_FOREACH(nc, &net_clients, next) {
374 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
375 if (nc->queue_index == 0) {
376 func(qemu_get_nic(nc), opaque);
382 int qemu_can_send_packet(NetClientState *sender)
384 if (!sender->peer) {
385 return 1;
388 if (sender->peer->receive_disabled) {
389 return 0;
390 } else if (sender->peer->info->can_receive &&
391 !sender->peer->info->can_receive(sender->peer)) {
392 return 0;
394 return 1;
397 ssize_t qemu_deliver_packet(NetClientState *sender,
398 unsigned flags,
399 const uint8_t *data,
400 size_t size,
401 void *opaque)
403 NetClientState *nc = opaque;
404 ssize_t ret;
406 if (nc->link_down) {
407 return size;
410 if (nc->receive_disabled) {
411 return 0;
414 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
415 ret = nc->info->receive_raw(nc, data, size);
416 } else {
417 ret = nc->info->receive(nc, data, size);
420 if (ret == 0) {
421 nc->receive_disabled = 1;
424 return ret;
427 void qemu_purge_queued_packets(NetClientState *nc)
429 if (!nc->peer) {
430 return;
433 qemu_net_queue_purge(nc->peer->send_queue, nc);
436 void qemu_flush_queued_packets(NetClientState *nc)
438 nc->receive_disabled = 0;
440 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
441 if (net_hub_flush(nc->peer)) {
442 qemu_notify_event();
444 return;
446 if (qemu_net_queue_flush(nc->send_queue)) {
447 /* We emptied the queue successfully, signal to the IO thread to repoll
448 * the file descriptor (for tap, for example).
450 qemu_notify_event();
454 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
455 unsigned flags,
456 const uint8_t *buf, int size,
457 NetPacketSent *sent_cb)
459 NetQueue *queue;
461 #ifdef DEBUG_NET
462 printf("qemu_send_packet_async:\n");
463 hex_dump(stdout, buf, size);
464 #endif
466 if (sender->link_down || !sender->peer) {
467 return size;
470 queue = sender->peer->send_queue;
472 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
475 ssize_t qemu_send_packet_async(NetClientState *sender,
476 const uint8_t *buf, int size,
477 NetPacketSent *sent_cb)
479 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
480 buf, size, sent_cb);
483 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
485 qemu_send_packet_async(nc, buf, size, NULL);
488 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
490 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
491 buf, size, NULL);
494 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
495 int iovcnt)
497 uint8_t buffer[NET_BUFSIZE];
498 size_t offset;
500 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
502 return nc->info->receive(nc, buffer, offset);
505 ssize_t qemu_deliver_packet_iov(NetClientState *sender,
506 unsigned flags,
507 const struct iovec *iov,
508 int iovcnt,
509 void *opaque)
511 NetClientState *nc = opaque;
512 int ret;
514 if (nc->link_down) {
515 return iov_size(iov, iovcnt);
518 if (nc->receive_disabled) {
519 return 0;
522 if (nc->info->receive_iov) {
523 ret = nc->info->receive_iov(nc, iov, iovcnt);
524 } else {
525 ret = nc_sendv_compat(nc, iov, iovcnt);
528 if (ret == 0) {
529 nc->receive_disabled = 1;
532 return ret;
535 ssize_t qemu_sendv_packet_async(NetClientState *sender,
536 const struct iovec *iov, int iovcnt,
537 NetPacketSent *sent_cb)
539 NetQueue *queue;
541 if (sender->link_down || !sender->peer) {
542 return iov_size(iov, iovcnt);
545 queue = sender->peer->send_queue;
547 return qemu_net_queue_send_iov(queue, sender,
548 QEMU_NET_PACKET_FLAG_NONE,
549 iov, iovcnt, sent_cb);
552 ssize_t
553 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
555 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
558 NetClientState *qemu_find_netdev(const char *id)
560 NetClientState *nc;
562 QTAILQ_FOREACH(nc, &net_clients, next) {
563 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
564 continue;
565 if (!strcmp(nc->name, id)) {
566 return nc;
570 return NULL;
573 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
574 NetClientOptionsKind type, int max)
576 NetClientState *nc;
577 int ret = 0;
579 QTAILQ_FOREACH(nc, &net_clients, next) {
580 if (nc->info->type == type) {
581 continue;
583 if (!strcmp(nc->name, id)) {
584 if (ret < max) {
585 ncs[ret] = nc;
587 ret++;
591 return ret;
594 static int nic_get_free_idx(void)
596 int index;
598 for (index = 0; index < MAX_NICS; index++)
599 if (!nd_table[index].used)
600 return index;
601 return -1;
604 int qemu_show_nic_models(const char *arg, const char *const *models)
606 int i;
608 if (!arg || !is_help_option(arg)) {
609 return 0;
612 fprintf(stderr, "qemu: Supported NIC models: ");
613 for (i = 0 ; models[i]; i++)
614 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
615 return 1;
618 void qemu_check_nic_model(NICInfo *nd, const char *model)
620 const char *models[2];
622 models[0] = model;
623 models[1] = NULL;
625 if (qemu_show_nic_models(nd->model, models))
626 exit(0);
627 if (qemu_find_nic_model(nd, models, model) < 0)
628 exit(1);
631 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
632 const char *default_model)
634 int i;
636 if (!nd->model)
637 nd->model = g_strdup(default_model);
639 for (i = 0 ; models[i]; i++) {
640 if (strcmp(nd->model, models[i]) == 0)
641 return i;
644 error_report("Unsupported NIC model: %s", nd->model);
645 return -1;
648 static int net_init_nic(const NetClientOptions *opts, const char *name,
649 NetClientState *peer)
651 int idx;
652 NICInfo *nd;
653 const NetLegacyNicOptions *nic;
655 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
656 nic = opts->nic;
658 idx = nic_get_free_idx();
659 if (idx == -1 || nb_nics >= MAX_NICS) {
660 error_report("Too Many NICs");
661 return -1;
664 nd = &nd_table[idx];
666 memset(nd, 0, sizeof(*nd));
668 if (nic->has_netdev) {
669 nd->netdev = qemu_find_netdev(nic->netdev);
670 if (!nd->netdev) {
671 error_report("netdev '%s' not found", nic->netdev);
672 return -1;
674 } else {
675 assert(peer);
676 nd->netdev = peer;
678 nd->name = g_strdup(name);
679 if (nic->has_model) {
680 nd->model = g_strdup(nic->model);
682 if (nic->has_addr) {
683 nd->devaddr = g_strdup(nic->addr);
686 if (nic->has_macaddr &&
687 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
688 error_report("invalid syntax for ethernet address");
689 return -1;
691 qemu_macaddr_default_if_unset(&nd->macaddr);
693 if (nic->has_vectors) {
694 if (nic->vectors > 0x7ffffff) {
695 error_report("invalid # of vectors: %"PRIu32, nic->vectors);
696 return -1;
698 nd->nvectors = nic->vectors;
699 } else {
700 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
703 nd->used = 1;
704 nb_nics++;
706 return idx;
710 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
711 const NetClientOptions *opts,
712 const char *name,
713 NetClientState *peer) = {
714 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
715 #ifdef CONFIG_SLIRP
716 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
717 #endif
718 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
719 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
720 #ifdef CONFIG_VDE
721 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
722 #endif
723 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
724 #ifdef CONFIG_NET_BRIDGE
725 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
726 #endif
727 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
731 static int net_client_init1(const void *object, int is_netdev, Error **errp)
733 union {
734 const Netdev *netdev;
735 const NetLegacy *net;
736 } u;
737 const NetClientOptions *opts;
738 const char *name;
740 if (is_netdev) {
741 u.netdev = object;
742 opts = u.netdev->opts;
743 name = u.netdev->id;
745 switch (opts->kind) {
746 #ifdef CONFIG_SLIRP
747 case NET_CLIENT_OPTIONS_KIND_USER:
748 #endif
749 case NET_CLIENT_OPTIONS_KIND_TAP:
750 case NET_CLIENT_OPTIONS_KIND_SOCKET:
751 #ifdef CONFIG_VDE
752 case NET_CLIENT_OPTIONS_KIND_VDE:
753 #endif
754 #ifdef CONFIG_NET_BRIDGE
755 case NET_CLIENT_OPTIONS_KIND_BRIDGE:
756 #endif
757 case NET_CLIENT_OPTIONS_KIND_HUBPORT:
758 break;
760 default:
761 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
762 "a netdev backend type");
763 return -1;
765 } else {
766 u.net = object;
767 opts = u.net->opts;
768 /* missing optional values have been initialized to "all bits zero" */
769 name = u.net->has_id ? u.net->id : u.net->name;
772 if (net_client_init_fun[opts->kind]) {
773 NetClientState *peer = NULL;
775 /* Do not add to a vlan if it's a -netdev or a nic with a netdev=
776 * parameter. */
777 if (!is_netdev &&
778 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
779 !opts->nic->has_netdev)) {
780 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL);
783 if (net_client_init_fun[opts->kind](opts, name, peer) < 0) {
784 /* TODO push error reporting into init() methods */
785 error_set(errp, QERR_DEVICE_INIT_FAILED,
786 NetClientOptionsKind_lookup[opts->kind]);
787 return -1;
790 return 0;
794 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
796 if (is_netdev) {
797 visit_type_Netdev(v, (Netdev **)object, NULL, errp);
798 } else {
799 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
804 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
806 void *object = NULL;
807 Error *err = NULL;
808 int ret = -1;
811 OptsVisitor *ov = opts_visitor_new(opts);
813 net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
814 opts_visitor_cleanup(ov);
817 if (!err) {
818 ret = net_client_init1(object, is_netdev, &err);
821 if (object) {
822 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
824 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
825 qapi_dealloc_visitor_cleanup(dv);
828 error_propagate(errp, err);
829 return ret;
833 static int net_host_check_device(const char *device)
835 int i;
836 const char *valid_param_list[] = { "tap", "socket", "dump"
837 #ifdef CONFIG_NET_BRIDGE
838 , "bridge"
839 #endif
840 #ifdef CONFIG_SLIRP
841 ,"user"
842 #endif
843 #ifdef CONFIG_VDE
844 ,"vde"
845 #endif
847 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
848 if (!strncmp(valid_param_list[i], device,
849 strlen(valid_param_list[i])))
850 return 1;
853 return 0;
856 void net_host_device_add(Monitor *mon, const QDict *qdict)
858 const char *device = qdict_get_str(qdict, "device");
859 const char *opts_str = qdict_get_try_str(qdict, "opts");
860 Error *local_err = NULL;
861 QemuOpts *opts;
863 if (!net_host_check_device(device)) {
864 monitor_printf(mon, "invalid host network device %s\n", device);
865 return;
868 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
869 if (!opts) {
870 return;
873 qemu_opt_set(opts, "type", device);
875 net_client_init(opts, 0, &local_err);
876 if (error_is_set(&local_err)) {
877 qerror_report_err(local_err);
878 error_free(local_err);
879 monitor_printf(mon, "adding host network device %s failed\n", device);
883 void net_host_device_remove(Monitor *mon, const QDict *qdict)
885 NetClientState *nc;
886 int vlan_id = qdict_get_int(qdict, "vlan_id");
887 const char *device = qdict_get_str(qdict, "device");
889 nc = net_hub_find_client_by_name(vlan_id, device);
890 if (!nc) {
891 return;
893 if (!net_host_check_device(nc->model)) {
894 monitor_printf(mon, "invalid host network device %s\n", device);
895 return;
897 qemu_del_net_client(nc);
900 void netdev_add(QemuOpts *opts, Error **errp)
902 net_client_init(opts, 1, errp);
905 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret)
907 Error *local_err = NULL;
908 QemuOptsList *opts_list;
909 QemuOpts *opts;
911 opts_list = qemu_find_opts_err("netdev", &local_err);
912 if (error_is_set(&local_err)) {
913 goto exit_err;
916 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
917 if (error_is_set(&local_err)) {
918 goto exit_err;
921 netdev_add(opts, &local_err);
922 if (error_is_set(&local_err)) {
923 qemu_opts_del(opts);
924 goto exit_err;
927 return 0;
929 exit_err:
930 qerror_report_err(local_err);
931 error_free(local_err);
932 return -1;
935 void qmp_netdev_del(const char *id, Error **errp)
937 NetClientState *nc;
938 QemuOpts *opts;
940 nc = qemu_find_netdev(id);
941 if (!nc) {
942 error_set(errp, QERR_DEVICE_NOT_FOUND, id);
943 return;
946 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
947 if (!opts) {
948 error_setg(errp, "Device '%s' is not a netdev", id);
949 return;
952 qemu_del_net_client(nc);
953 qemu_opts_del(opts);
956 void print_net_client(Monitor *mon, NetClientState *nc)
958 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
959 nc->queue_index,
960 NetClientOptionsKind_lookup[nc->info->type],
961 nc->info_str);
964 void do_info_network(Monitor *mon, const QDict *qdict)
966 NetClientState *nc, *peer;
967 NetClientOptionsKind type;
969 net_hub_info(mon);
971 QTAILQ_FOREACH(nc, &net_clients, next) {
972 peer = nc->peer;
973 type = nc->info->type;
975 /* Skip if already printed in hub info */
976 if (net_hub_id_for_client(nc, NULL) == 0) {
977 continue;
980 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
981 print_net_client(mon, nc);
982 } /* else it's a netdev connected to a NIC, printed with the NIC */
983 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
984 monitor_printf(mon, " \\ ");
985 print_net_client(mon, peer);
990 void qmp_set_link(const char *name, bool up, Error **errp)
992 NetClientState *ncs[MAX_QUEUE_NUM];
993 NetClientState *nc;
994 int queues, i;
996 queues = qemu_find_net_clients_except(name, ncs,
997 NET_CLIENT_OPTIONS_KIND_MAX,
998 MAX_QUEUE_NUM);
1000 if (queues == 0) {
1001 error_set(errp, QERR_DEVICE_NOT_FOUND, name);
1002 return;
1004 nc = ncs[0];
1006 for (i = 0; i < queues; i++) {
1007 ncs[i]->link_down = !up;
1010 if (nc->info->link_status_changed) {
1011 nc->info->link_status_changed(nc);
1014 /* Notify peer. Don't update peer link status: this makes it possible to
1015 * disconnect from host network without notifying the guest.
1016 * FIXME: is disconnected link status change operation useful?
1018 * Current behaviour is compatible with qemu vlans where there could be
1019 * multiple clients that can still communicate with each other in
1020 * disconnected mode. For now maintain this compatibility. */
1021 if (nc->peer && nc->peer->info->link_status_changed) {
1022 nc->peer->info->link_status_changed(nc->peer);
1026 void net_cleanup(void)
1028 NetClientState *nc;
1030 /* We may del multiple entries during qemu_del_net_client(),
1031 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1033 while (!QTAILQ_EMPTY(&net_clients)) {
1034 nc = QTAILQ_FIRST(&net_clients);
1035 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1036 qemu_del_nic(qemu_get_nic(nc));
1037 } else {
1038 qemu_del_net_client(nc);
1043 void net_check_clients(void)
1045 NetClientState *nc;
1046 int i;
1048 /* Don't warn about the default network setup that you get if
1049 * no command line -net or -netdev options are specified. There
1050 * are two cases that we would otherwise complain about:
1051 * (1) board doesn't support a NIC but the implicit "-net nic"
1052 * requested one
1053 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
1054 * sets up a nic that isn't connected to anything.
1056 if (default_net) {
1057 return;
1060 net_hub_check_clients();
1062 QTAILQ_FOREACH(nc, &net_clients, next) {
1063 if (!nc->peer) {
1064 fprintf(stderr, "Warning: %s %s has no peer\n",
1065 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
1066 "nic" : "netdev", nc->name);
1070 /* Check that all NICs requested via -net nic actually got created.
1071 * NICs created via -device don't need to be checked here because
1072 * they are always instantiated.
1074 for (i = 0; i < MAX_NICS; i++) {
1075 NICInfo *nd = &nd_table[i];
1076 if (nd->used && !nd->instantiated) {
1077 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1078 "was not created (not supported by this machine?)\n",
1079 nd->name ? nd->name : "anonymous",
1080 nd->model ? nd->model : "unspecified");
1085 static int net_init_client(QemuOpts *opts, void *dummy)
1087 Error *local_err = NULL;
1089 net_client_init(opts, 0, &local_err);
1090 if (error_is_set(&local_err)) {
1091 qerror_report_err(local_err);
1092 error_free(local_err);
1093 return -1;
1096 return 0;
1099 static int net_init_netdev(QemuOpts *opts, void *dummy)
1101 Error *local_err = NULL;
1102 int ret;
1104 ret = net_client_init(opts, 1, &local_err);
1105 if (error_is_set(&local_err)) {
1106 qerror_report_err(local_err);
1107 error_free(local_err);
1108 return -1;
1111 return ret;
1114 int net_init_clients(void)
1116 QemuOptsList *net = qemu_find_opts("net");
1118 if (default_net) {
1119 /* if no clients, we use a default config */
1120 qemu_opts_set(net, NULL, "type", "nic");
1121 #ifdef CONFIG_SLIRP
1122 qemu_opts_set(net, NULL, "type", "user");
1123 #endif
1126 QTAILQ_INIT(&net_clients);
1128 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1)
1129 return -1;
1131 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) {
1132 return -1;
1135 return 0;
1138 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1140 #if defined(CONFIG_SLIRP)
1141 int ret;
1142 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1143 return ret;
1145 #endif
1147 if (!qemu_opts_parse(opts_list, optarg, 1)) {
1148 return -1;
1151 default_net = 0;
1152 return 0;
1155 /* From FreeBSD */
1156 /* XXX: optimize */
1157 unsigned compute_mcast_idx(const uint8_t *ep)
1159 uint32_t crc;
1160 int carry, i, j;
1161 uint8_t b;
1163 crc = 0xffffffff;
1164 for (i = 0; i < 6; i++) {
1165 b = *ep++;
1166 for (j = 0; j < 8; j++) {
1167 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1168 crc <<= 1;
1169 b >>= 1;
1170 if (carry) {
1171 crc = ((crc ^ POLYNOMIAL) | carry);
1175 return crc >> 26;
1178 QemuOptsList qemu_netdev_opts = {
1179 .name = "netdev",
1180 .implied_opt_name = "type",
1181 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1182 .desc = {
1184 * no elements => accept any params
1185 * validation will happen later
1187 { /* end of list */ }
1191 QemuOptsList qemu_net_opts = {
1192 .name = "net",
1193 .implied_opt_name = "type",
1194 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1195 .desc = {
1197 * no elements => accept any params
1198 * validation will happen later
1200 { /* end of list */ }