diff options
Diffstat (limited to 'net.c')
| -rw-r--r-- | net.c | 1056 |
1 files changed, 0 insertions, 1056 deletions
@@ -1,1056 +0,0 @@ -/* - * QEMU System Emulator - * - * Copyright (c) 2003-2008 Fabrice Bellard - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ -#include "config-host.h" - -#include "net.h" -#include "net/clients.h" -#include "net/hub.h" -#include "net/slirp.h" -#include "net/util.h" - -#include "monitor.h" -#include "qemu-common.h" -#include "qemu_socket.h" -#include "qemu-config.h" -#include "qmp-commands.h" -#include "hw/qdev.h" -#include "iov.h" -#include "qapi-visit.h" -#include "qapi/opts-visitor.h" -#include "qapi/qapi-dealloc-visitor.h" - -/* Net bridge is currently not supported for W32. */ -#if !defined(_WIN32) -# define CONFIG_NET_BRIDGE -#endif - -static QTAILQ_HEAD(, NetClientState) net_clients; - -int default_net = 1; - -/***********************************************************/ -/* network device redirectors */ - -#if defined(DEBUG_NET) -static void hex_dump(FILE *f, const uint8_t *buf, int size) -{ - int len, i, j, c; - - for(i=0;i<size;i+=16) { - len = size - i; - if (len > 16) - len = 16; - fprintf(f, "%08x ", i); - for(j=0;j<16;j++) { - if (j < len) - fprintf(f, " %02x", buf[i+j]); - else - fprintf(f, " "); - } - fprintf(f, " "); - for(j=0;j<len;j++) { - c = buf[i+j]; - if (c < ' ' || c > '~') - c = '.'; - fprintf(f, "%c", c); - } - fprintf(f, "\n"); - } -} -#endif - -static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) -{ - const char *p, *p1; - int len; - p = *pp; - p1 = strchr(p, sep); - if (!p1) - return -1; - len = p1 - p; - p1++; - if (buf_size > 0) { - if (len > buf_size - 1) - len = buf_size - 1; - memcpy(buf, p, len); - buf[len] = '\0'; - } - *pp = p1; - return 0; -} - -int parse_host_port(struct sockaddr_in *saddr, const char *str) -{ - char buf[512]; - struct hostent *he; - const char *p, *r; - int port; - - p = str; - if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) - return -1; - saddr->sin_family = AF_INET; - if (buf[0] == '\0') { - saddr->sin_addr.s_addr = 0; - } else { - if (qemu_isdigit(buf[0])) { - if (!inet_aton(buf, &saddr->sin_addr)) - return -1; - } else { - if ((he = gethostbyname(buf)) == NULL) - return - 1; - saddr->sin_addr = *(struct in_addr *)he->h_addr; - } - } - port = strtol(p, (char **)&r, 0); - if (r == p) - return -1; - saddr->sin_port = htons(port); - return 0; -} - -void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) -{ - snprintf(nc->info_str, sizeof(nc->info_str), - "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", - nc->model, - macaddr[0], macaddr[1], macaddr[2], - macaddr[3], macaddr[4], macaddr[5]); -} - -void qemu_macaddr_default_if_unset(MACAddr *macaddr) -{ - static int index = 0; - static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; - - if (memcmp(macaddr, &zero, sizeof(zero)) != 0) - return; - macaddr->a[0] = 0x52; - macaddr->a[1] = 0x54; - macaddr->a[2] = 0x00; - macaddr->a[3] = 0x12; - macaddr->a[4] = 0x34; - macaddr->a[5] = 0x56 + index++; -} - -/** - * Generate a name for net client - * - * Only net clients created with the legacy -net option need this. Naming is - * mandatory for net clients created with -netdev. - */ -static char *assign_name(NetClientState *nc1, const char *model) -{ - NetClientState *nc; - char buf[256]; - int id = 0; - - QTAILQ_FOREACH(nc, &net_clients, next) { - if (nc == nc1) { - continue; - } - /* For compatibility only bump id for net clients on a vlan */ - if (strcmp(nc->model, model) == 0 && - net_hub_id_for_client(nc, NULL) == 0) { - id++; - } - } - - snprintf(buf, sizeof(buf), "%s.%d", model, id); - - return g_strdup(buf); -} - -NetClientState *qemu_new_net_client(NetClientInfo *info, - NetClientState *peer, - const char *model, - const char *name) -{ - NetClientState *nc; - - assert(info->size >= sizeof(NetClientState)); - - nc = g_malloc0(info->size); - - nc->info = info; - nc->model = g_strdup(model); - if (name) { - nc->name = g_strdup(name); - } else { - nc->name = assign_name(nc, model); - } - - if (peer) { - assert(!peer->peer); - nc->peer = peer; - peer->peer = nc; - } - QTAILQ_INSERT_TAIL(&net_clients, nc, next); - - nc->send_queue = qemu_new_net_queue(nc); - - return nc; -} - -NICState *qemu_new_nic(NetClientInfo *info, - NICConf *conf, - const char *model, - const char *name, - void *opaque) -{ - NetClientState *nc; - NICState *nic; - - assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC); - assert(info->size >= sizeof(NICState)); - - nc = qemu_new_net_client(info, conf->peer, model, name); - - nic = DO_UPCAST(NICState, nc, nc); - nic->conf = conf; - nic->opaque = opaque; - - return nic; -} - -static void qemu_cleanup_net_client(NetClientState *nc) -{ - QTAILQ_REMOVE(&net_clients, nc, next); - - if (nc->info->cleanup) { - nc->info->cleanup(nc); - } -} - -static void qemu_free_net_client(NetClientState *nc) -{ - if (nc->send_queue) { - qemu_del_net_queue(nc->send_queue); - } - if (nc->peer) { - nc->peer->peer = NULL; - } - g_free(nc->name); - g_free(nc->model); - g_free(nc); -} - -void qemu_del_net_client(NetClientState *nc) -{ - /* If there is a peer NIC, delete and cleanup client, but do not free. */ - if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { - NICState *nic = DO_UPCAST(NICState, nc, nc->peer); - if (nic->peer_deleted) { - return; - } - nic->peer_deleted = true; - /* Let NIC know peer is gone. */ - nc->peer->link_down = true; - if (nc->peer->info->link_status_changed) { - nc->peer->info->link_status_changed(nc->peer); - } - qemu_cleanup_net_client(nc); - return; - } - - /* If this is a peer NIC and peer has already been deleted, free it now. */ - if (nc->peer && nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { - NICState *nic = DO_UPCAST(NICState, nc, nc); - if (nic->peer_deleted) { - qemu_free_net_client(nc->peer); - } - } - - qemu_cleanup_net_client(nc); - qemu_free_net_client(nc); -} - -void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) -{ - NetClientState *nc; - - QTAILQ_FOREACH(nc, &net_clients, next) { - if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { - func(DO_UPCAST(NICState, nc, nc), opaque); - } - } -} - -int qemu_can_send_packet(NetClientState *sender) -{ - if (!sender->peer) { - return 1; - } - - if (sender->peer->receive_disabled) { - return 0; - } else if (sender->peer->info->can_receive && - !sender->peer->info->can_receive(sender->peer)) { - return 0; - } - return 1; -} - -ssize_t qemu_deliver_packet(NetClientState *sender, - unsigned flags, - const uint8_t *data, - size_t size, - void *opaque) -{ - NetClientState *nc = opaque; - ssize_t ret; - - if (nc->link_down) { - return size; - } - - if (nc->receive_disabled) { - return 0; - } - - if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { - ret = nc->info->receive_raw(nc, data, size); - } else { - ret = nc->info->receive(nc, data, size); - } - - if (ret == 0) { - nc->receive_disabled = 1; - }; - - return ret; -} - -void qemu_purge_queued_packets(NetClientState *nc) -{ - if (!nc->peer) { - return; - } - - qemu_net_queue_purge(nc->peer->send_queue, nc); -} - -void qemu_flush_queued_packets(NetClientState *nc) -{ - nc->receive_disabled = 0; - - if (qemu_net_queue_flush(nc->send_queue)) { - /* We emptied the queue successfully, signal to the IO thread to repoll - * the file descriptor (for tap, for example). - */ - qemu_notify_event(); - } -} - -static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, - unsigned flags, - const uint8_t *buf, int size, - NetPacketSent *sent_cb) -{ - NetQueue *queue; - -#ifdef DEBUG_NET - printf("qemu_send_packet_async:\n"); - hex_dump(stdout, buf, size); -#endif - - if (sender->link_down || !sender->peer) { - return size; - } - - queue = sender->peer->send_queue; - - return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); -} - -ssize_t qemu_send_packet_async(NetClientState *sender, - const uint8_t *buf, int size, - NetPacketSent *sent_cb) -{ - return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, - buf, size, sent_cb); -} - -void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) -{ - qemu_send_packet_async(nc, buf, size, NULL); -} - -ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) -{ - return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, - buf, size, NULL); -} - -static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, - int iovcnt) -{ - uint8_t buffer[4096]; - size_t offset; - - offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer)); - - return nc->info->receive(nc, buffer, offset); -} - -ssize_t qemu_deliver_packet_iov(NetClientState *sender, - unsigned flags, - const struct iovec *iov, - int iovcnt, - void *opaque) -{ - NetClientState *nc = opaque; - int ret; - - if (nc->link_down) { - return iov_size(iov, iovcnt); - } - - if (nc->receive_disabled) { - return 0; - } - - if (nc->info->receive_iov) { - ret = nc->info->receive_iov(nc, iov, iovcnt); - } else { - ret = nc_sendv_compat(nc, iov, iovcnt); - } - - if (ret == 0) { - nc->receive_disabled = 1; - } - - return ret; -} - -ssize_t qemu_sendv_packet_async(NetClientState *sender, - const struct iovec *iov, int iovcnt, - NetPacketSent *sent_cb) -{ - NetQueue *queue; - - if (sender->link_down || !sender->peer) { - return iov_size(iov, iovcnt); - } - - queue = sender->peer->send_queue; - - return qemu_net_queue_send_iov(queue, sender, - QEMU_NET_PACKET_FLAG_NONE, - iov, iovcnt, sent_cb); -} - -ssize_t -qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) -{ - return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); -} - -NetClientState *qemu_find_netdev(const char *id) -{ - NetClientState *nc; - - QTAILQ_FOREACH(nc, &net_clients, next) { - if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) - continue; - if (!strcmp(nc->name, id)) { - return nc; - } - } - - return NULL; -} - -static int nic_get_free_idx(void) -{ - int index; - - for (index = 0; index < MAX_NICS; index++) - if (!nd_table[index].used) - return index; - return -1; -} - -int qemu_show_nic_models(const char *arg, const char *const *models) -{ - int i; - - if (!arg || !is_help_option(arg)) { - return 0; - } - - fprintf(stderr, "qemu: Supported NIC models: "); - for (i = 0 ; models[i]; i++) - fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); - return 1; -} - -void qemu_check_nic_model(NICInfo *nd, const char *model) -{ - const char *models[2]; - - models[0] = model; - models[1] = NULL; - - if (qemu_show_nic_models(nd->model, models)) - exit(0); - if (qemu_find_nic_model(nd, models, model) < 0) - exit(1); -} - -int qemu_find_nic_model(NICInfo *nd, const char * const *models, - const char *default_model) -{ - int i; - - if (!nd->model) - nd->model = g_strdup(default_model); - - for (i = 0 ; models[i]; i++) { - if (strcmp(nd->model, models[i]) == 0) - return i; - } - - error_report("Unsupported NIC model: %s", nd->model); - return -1; -} - -static int net_init_nic(const NetClientOptions *opts, const char *name, - NetClientState *peer) -{ - int idx; - NICInfo *nd; - const NetLegacyNicOptions *nic; - - assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC); - nic = opts->nic; - - idx = nic_get_free_idx(); - if (idx == -1 || nb_nics >= MAX_NICS) { - error_report("Too Many NICs"); - return -1; - } - - nd = &nd_table[idx]; - - memset(nd, 0, sizeof(*nd)); - - if (nic->has_netdev) { - nd->netdev = qemu_find_netdev(nic->netdev); - if (!nd->netdev) { - error_report("netdev '%s' not found", nic->netdev); - return -1; - } - } else { - assert(peer); - nd->netdev = peer; - } - if (name) { - nd->name = g_strdup(name); - } - if (nic->has_model) { - nd->model = g_strdup(nic->model); - } - if (nic->has_addr) { - nd->devaddr = g_strdup(nic->addr); - } - - if (nic->has_macaddr && - net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { - error_report("invalid syntax for ethernet address"); - return -1; - } - qemu_macaddr_default_if_unset(&nd->macaddr); - - if (nic->has_vectors) { - if (nic->vectors > 0x7ffffff) { - error_report("invalid # of vectors: %"PRIu32, nic->vectors); - return -1; - } - nd->nvectors = nic->vectors; - } else { - nd->nvectors = DEV_NVECTORS_UNSPECIFIED; - } - - nd->used = 1; - nb_nics++; - - return idx; -} - - -static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])( - const NetClientOptions *opts, - const char *name, - NetClientState *peer) = { - [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, -#ifdef CONFIG_SLIRP - [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, -#endif - [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, - [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, -#ifdef CONFIG_VDE - [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, -#endif - [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, -#ifdef CONFIG_NET_BRIDGE - [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, -#endif - [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, -}; - - -static int net_client_init1(const void *object, int is_netdev, Error **errp) -{ - union { - const Netdev *netdev; - const NetLegacy *net; - } u; - const NetClientOptions *opts; - const char *name; - - if (is_netdev) { - u.netdev = object; - opts = u.netdev->opts; - name = u.netdev->id; - - switch (opts->kind) { -#ifdef CONFIG_SLIRP - case NET_CLIENT_OPTIONS_KIND_USER: -#endif - case NET_CLIENT_OPTIONS_KIND_TAP: - case NET_CLIENT_OPTIONS_KIND_SOCKET: -#ifdef CONFIG_VDE - case NET_CLIENT_OPTIONS_KIND_VDE: -#endif -#ifdef CONFIG_NET_BRIDGE - case NET_CLIENT_OPTIONS_KIND_BRIDGE: -#endif - case NET_CLIENT_OPTIONS_KIND_HUBPORT: - break; - - default: - error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", - "a netdev backend type"); - return -1; - } - } else { - u.net = object; - opts = u.net->opts; - /* missing optional values have been initialized to "all bits zero" */ - name = u.net->has_id ? u.net->id : u.net->name; - } - - if (net_client_init_fun[opts->kind]) { - NetClientState *peer = NULL; - - /* Do not add to a vlan if it's a -netdev or a nic with a netdev= - * parameter. */ - if (!is_netdev && - (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC || - !opts->nic->has_netdev)) { - peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL); - } - - if (net_client_init_fun[opts->kind](opts, name, peer) < 0) { - /* TODO push error reporting into init() methods */ - error_set(errp, QERR_DEVICE_INIT_FAILED, - NetClientOptionsKind_lookup[opts->kind]); - return -1; - } - } - return 0; -} - - -static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp) -{ - if (is_netdev) { - visit_type_Netdev(v, (Netdev **)object, NULL, errp); - } else { - visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp); - } -} - - -int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) -{ - void *object = NULL; - Error *err = NULL; - int ret = -1; - - { - OptsVisitor *ov = opts_visitor_new(opts); - - net_visit(opts_get_visitor(ov), is_netdev, &object, &err); - opts_visitor_cleanup(ov); - } - - if (!err) { - ret = net_client_init1(object, is_netdev, &err); - } - - if (object) { - QapiDeallocVisitor *dv = qapi_dealloc_visitor_new(); - - net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL); - qapi_dealloc_visitor_cleanup(dv); - } - - error_propagate(errp, err); - return ret; -} - - -static int net_host_check_device(const char *device) -{ - int i; - const char *valid_param_list[] = { "tap", "socket", "dump" -#ifdef CONFIG_NET_BRIDGE - , "bridge" -#endif -#ifdef CONFIG_SLIRP - ,"user" -#endif -#ifdef CONFIG_VDE - ,"vde" -#endif - }; - for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) { - if (!strncmp(valid_param_list[i], device, - strlen(valid_param_list[i]))) - return 1; - } - - return 0; -} - -void net_host_device_add(Monitor *mon, const QDict *qdict) -{ - const char *device = qdict_get_str(qdict, "device"); - const char *opts_str = qdict_get_try_str(qdict, "opts"); - Error *local_err = NULL; - QemuOpts *opts; - - if (!net_host_check_device(device)) { - monitor_printf(mon, "invalid host network device %s\n", device); - return; - } - - opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); - if (!opts) { - return; - } - - qemu_opt_set(opts, "type", device); - - net_client_init(opts, 0, &local_err); - if (error_is_set(&local_err)) { - qerror_report_err(local_err); - error_free(local_err); - monitor_printf(mon, "adding host network device %s failed\n", device); - } -} - -void net_host_device_remove(Monitor *mon, const QDict *qdict) -{ - NetClientState *nc; - int vlan_id = qdict_get_int(qdict, "vlan_id"); - const char *device = qdict_get_str(qdict, "device"); - - nc = net_hub_find_client_by_name(vlan_id, device); - if (!nc) { - return; - } - if (!net_host_check_device(nc->model)) { - monitor_printf(mon, "invalid host network device %s\n", device); - return; - } - qemu_del_net_client(nc); -} - -void netdev_add(QemuOpts *opts, Error **errp) -{ - net_client_init(opts, 1, errp); -} - -int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret) -{ - Error *local_err = NULL; - QemuOptsList *opts_list; - QemuOpts *opts; - - opts_list = qemu_find_opts_err("netdev", &local_err); - if (error_is_set(&local_err)) { - goto exit_err; - } - - opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); - if (error_is_set(&local_err)) { - goto exit_err; - } - - netdev_add(opts, &local_err); - if (error_is_set(&local_err)) { - qemu_opts_del(opts); - goto exit_err; - } - - return 0; - -exit_err: - qerror_report_err(local_err); - error_free(local_err); - return -1; -} - -void qmp_netdev_del(const char *id, Error **errp) -{ - NetClientState *nc; - QemuOpts *opts; - - nc = qemu_find_netdev(id); - if (!nc) { - error_set(errp, QERR_DEVICE_NOT_FOUND, id); - return; - } - - opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); - if (!opts) { - error_setg(errp, "Device '%s' is not a netdev", id); - return; - } - - qemu_del_net_client(nc); - qemu_opts_del(opts); -} - -void print_net_client(Monitor *mon, NetClientState *nc) -{ - monitor_printf(mon, "%s: type=%s,%s\n", nc->name, - NetClientOptionsKind_lookup[nc->info->type], nc->info_str); -} - -void do_info_network(Monitor *mon) -{ - NetClientState *nc, *peer; - NetClientOptionsKind type; - - net_hub_info(mon); - - QTAILQ_FOREACH(nc, &net_clients, next) { - peer = nc->peer; - type = nc->info->type; - - /* Skip if already printed in hub info */ - if (net_hub_id_for_client(nc, NULL) == 0) { - continue; - } - - if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) { - print_net_client(mon, nc); - } /* else it's a netdev connected to a NIC, printed with the NIC */ - if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) { - monitor_printf(mon, " \\ "); - print_net_client(mon, peer); - } - } -} - -void qmp_set_link(const char *name, bool up, Error **errp) -{ - NetClientState *nc = NULL; - - QTAILQ_FOREACH(nc, &net_clients, next) { - if (!strcmp(nc->name, name)) { - goto done; - } - } -done: - if (!nc) { - error_set(errp, QERR_DEVICE_NOT_FOUND, name); - return; - } - - nc->link_down = !up; - - if (nc->info->link_status_changed) { - nc->info->link_status_changed(nc); - } - - /* Notify peer. Don't update peer link status: this makes it possible to - * disconnect from host network without notifying the guest. - * FIXME: is disconnected link status change operation useful? - * - * Current behaviour is compatible with qemu vlans where there could be - * multiple clients that can still communicate with each other in - * disconnected mode. For now maintain this compatibility. */ - if (nc->peer && nc->peer->info->link_status_changed) { - nc->peer->info->link_status_changed(nc->peer); - } -} - -void net_cleanup(void) -{ - NetClientState *nc, *next_vc; - - QTAILQ_FOREACH_SAFE(nc, &net_clients, next, next_vc) { - qemu_del_net_client(nc); - } -} - -void net_check_clients(void) -{ - NetClientState *nc; - int i; - - /* Don't warn about the default network setup that you get if - * no command line -net or -netdev options are specified. There - * are two cases that we would otherwise complain about: - * (1) board doesn't support a NIC but the implicit "-net nic" - * requested one - * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" - * sets up a nic that isn't connected to anything. - */ - if (default_net) { - return; - } - - net_hub_check_clients(); - - QTAILQ_FOREACH(nc, &net_clients, next) { - if (!nc->peer) { - fprintf(stderr, "Warning: %s %s has no peer\n", - nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? - "nic" : "netdev", nc->name); - } - } - - /* Check that all NICs requested via -net nic actually got created. - * NICs created via -device don't need to be checked here because - * they are always instantiated. - */ - for (i = 0; i < MAX_NICS; i++) { - NICInfo *nd = &nd_table[i]; - if (nd->used && !nd->instantiated) { - fprintf(stderr, "Warning: requested NIC (%s, model %s) " - "was not created (not supported by this machine?)\n", - nd->name ? nd->name : "anonymous", - nd->model ? nd->model : "unspecified"); - } - } -} - -static int net_init_client(QemuOpts *opts, void *dummy) -{ - Error *local_err = NULL; - - net_client_init(opts, 0, &local_err); - if (error_is_set(&local_err)) { - qerror_report_err(local_err); - error_free(local_err); - return -1; - } - - return 0; -} - -static int net_init_netdev(QemuOpts *opts, void *dummy) -{ - Error *local_err = NULL; - int ret; - - ret = net_client_init(opts, 1, &local_err); - if (error_is_set(&local_err)) { - qerror_report_err(local_err); - error_free(local_err); - return -1; - } - - return ret; -} - -int net_init_clients(void) -{ - QemuOptsList *net = qemu_find_opts("net"); - - if (default_net) { - /* if no clients, we use a default config */ - qemu_opts_set(net, NULL, "type", "nic"); -#ifdef CONFIG_SLIRP - qemu_opts_set(net, NULL, "type", "user"); -#endif - } - - QTAILQ_INIT(&net_clients); - - if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1) - return -1; - - if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) { - return -1; - } - - return 0; -} - -int net_client_parse(QemuOptsList *opts_list, const char *optarg) -{ -#if defined(CONFIG_SLIRP) - int ret; - if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { - return ret; - } -#endif - - if (!qemu_opts_parse(opts_list, optarg, 1)) { - return -1; - } - - default_net = 0; - return 0; -} - -/* From FreeBSD */ -/* XXX: optimize */ -unsigned compute_mcast_idx(const uint8_t *ep) -{ - uint32_t crc; - int carry, i, j; - uint8_t b; - - crc = 0xffffffff; - for (i = 0; i < 6; i++) { - b = *ep++; - for (j = 0; j < 8; j++) { - carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); - crc <<= 1; - b >>= 1; - if (carry) { - crc = ((crc ^ POLYNOMIAL) | carry); - } - } - } - return crc >> 26; -} |