| /* |
| * 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 "net.h" |
| |
| #include "config-host.h" |
| |
| #include "net/tap.h" |
| #include "net/socket.h" |
| #include "net/dump.h" |
| #include "net/slirp.h" |
| #include "net/vde.h" |
| #include "net/hub.h" |
| #include "net/util.h" |
| #include "monitor.h" |
| #include "qemu-common.h" |
| #include "qemu_socket.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; |
| |
| qemu_net_queue_flush(nc->send_queue); |
| } |
| |
| 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; |
| |
| if (nc->link_down) { |
| return iov_size(iov, iovcnt); |
| } |
| |
| if (nc->info->receive_iov) { |
| return nc->info->receive_iov(nc, iov, iovcnt); |
| } else { |
| return nc_sendv_compat(nc, iov, iovcnt); |
| } |
| } |
| |
| 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; |
| |
| nc = qemu_find_netdev(id); |
| if (!nc) { |
| error_set(errp, QERR_DEVICE_NOT_FOUND, id); |
| return; |
| } |
| |
| qemu_del_net_client(nc); |
| qemu_opts_del(qemu_opts_find(qemu_find_opts_err("netdev", errp), id)); |
| } |
| |
| 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; |
| } |
