diff options
Diffstat (limited to 'net/net.c')
| -rw-r--r-- | net/net.c | 1056 |
1 files changed, 1056 insertions, 0 deletions
diff --git a/net/net.c b/net/net.c new file mode 100644 index 0000000000..dbf3e1b003 --- /dev/null +++ b/net/net.c @@ -0,0 +1,1056 @@ +/* + * 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/net.h" +#include "clients.h" +#include "hub.h" +#include "net/slirp.h" +#include "util.h" + +#include "monitor/monitor.h" +#include "qemu-common.h" +#include "qemu/sockets.h" +#include "qemu/config-file.h" +#include "qmp-commands.h" +#include "hw/qdev.h" +#include "qemu/iov.h" +#include "qapi-visit.h" +#include "qapi/opts-visitor.h" +#include "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; +} |