| /* |
| * 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/util.h" |
| #include "monitor.h" |
| #include "qemu-common.h" |
| #include "qemu_socket.h" |
| #include "qmp-commands.h" |
| #include "hw/qdev.h" |
| #include "iov.h" |
| |
| /* Net bridge is currently not supported for W32. */ |
| #if !defined(_WIN32) |
| # define CONFIG_NET_BRIDGE |
| #endif |
| |
| static QTAILQ_HEAD(, VLANState) vlans; |
| static QTAILQ_HEAD(, VLANClientState) non_vlan_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(VLANClientState *vc, uint8_t macaddr[6]) |
| { |
| snprintf(vc->info_str, sizeof(vc->info_str), |
| "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", |
| vc->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++; |
| } |
| |
| static char *assign_name(VLANClientState *vc1, const char *model) |
| { |
| VLANState *vlan; |
| VLANClientState *vc; |
| char buf[256]; |
| int id = 0; |
| |
| QTAILQ_FOREACH(vlan, &vlans, next) { |
| QTAILQ_FOREACH(vc, &vlan->clients, next) { |
| if (vc != vc1 && strcmp(vc->model, model) == 0) { |
| id++; |
| } |
| } |
| } |
| |
| QTAILQ_FOREACH(vc, &non_vlan_clients, next) { |
| if (vc != vc1 && strcmp(vc->model, model) == 0) { |
| id++; |
| } |
| } |
| |
| snprintf(buf, sizeof(buf), "%s.%d", model, id); |
| |
| return g_strdup(buf); |
| } |
| |
| static ssize_t qemu_deliver_packet(VLANClientState *sender, |
| unsigned flags, |
| const uint8_t *data, |
| size_t size, |
| void *opaque); |
| static ssize_t qemu_deliver_packet_iov(VLANClientState *sender, |
| unsigned flags, |
| const struct iovec *iov, |
| int iovcnt, |
| void *opaque); |
| |
| VLANClientState *qemu_new_net_client(NetClientInfo *info, |
| VLANState *vlan, |
| VLANClientState *peer, |
| const char *model, |
| const char *name) |
| { |
| VLANClientState *vc; |
| |
| assert(info->size >= sizeof(VLANClientState)); |
| |
| vc = g_malloc0(info->size); |
| |
| vc->info = info; |
| vc->model = g_strdup(model); |
| if (name) { |
| vc->name = g_strdup(name); |
| } else { |
| vc->name = assign_name(vc, model); |
| } |
| |
| if (vlan) { |
| assert(!peer); |
| vc->vlan = vlan; |
| QTAILQ_INSERT_TAIL(&vc->vlan->clients, vc, next); |
| } else { |
| if (peer) { |
| assert(!peer->peer); |
| vc->peer = peer; |
| peer->peer = vc; |
| } |
| QTAILQ_INSERT_TAIL(&non_vlan_clients, vc, next); |
| |
| vc->send_queue = qemu_new_net_queue(qemu_deliver_packet, |
| qemu_deliver_packet_iov, |
| vc); |
| } |
| |
| return vc; |
| } |
| |
| NICState *qemu_new_nic(NetClientInfo *info, |
| NICConf *conf, |
| const char *model, |
| const char *name, |
| void *opaque) |
| { |
| VLANClientState *nc; |
| NICState *nic; |
| |
| assert(info->type == NET_CLIENT_TYPE_NIC); |
| assert(info->size >= sizeof(NICState)); |
| |
| nc = qemu_new_net_client(info, conf->vlan, conf->peer, model, name); |
| |
| nic = DO_UPCAST(NICState, nc, nc); |
| nic->conf = conf; |
| nic->opaque = opaque; |
| |
| return nic; |
| } |
| |
| static void qemu_cleanup_vlan_client(VLANClientState *vc) |
| { |
| if (vc->vlan) { |
| QTAILQ_REMOVE(&vc->vlan->clients, vc, next); |
| } else { |
| QTAILQ_REMOVE(&non_vlan_clients, vc, next); |
| } |
| |
| if (vc->info->cleanup) { |
| vc->info->cleanup(vc); |
| } |
| } |
| |
| static void qemu_free_vlan_client(VLANClientState *vc) |
| { |
| if (!vc->vlan) { |
| if (vc->send_queue) { |
| qemu_del_net_queue(vc->send_queue); |
| } |
| if (vc->peer) { |
| vc->peer->peer = NULL; |
| } |
| } |
| g_free(vc->name); |
| g_free(vc->model); |
| g_free(vc); |
| } |
| |
| void qemu_del_vlan_client(VLANClientState *vc) |
| { |
| /* If there is a peer NIC, delete and cleanup client, but do not free. */ |
| if (!vc->vlan && vc->peer && vc->peer->info->type == NET_CLIENT_TYPE_NIC) { |
| NICState *nic = DO_UPCAST(NICState, nc, vc->peer); |
| if (nic->peer_deleted) { |
| return; |
| } |
| nic->peer_deleted = true; |
| /* Let NIC know peer is gone. */ |
| vc->peer->link_down = true; |
| if (vc->peer->info->link_status_changed) { |
| vc->peer->info->link_status_changed(vc->peer); |
| } |
| qemu_cleanup_vlan_client(vc); |
| return; |
| } |
| |
| /* If this is a peer NIC and peer has already been deleted, free it now. */ |
| if (!vc->vlan && vc->peer && vc->info->type == NET_CLIENT_TYPE_NIC) { |
| NICState *nic = DO_UPCAST(NICState, nc, vc); |
| if (nic->peer_deleted) { |
| qemu_free_vlan_client(vc->peer); |
| } |
| } |
| |
| qemu_cleanup_vlan_client(vc); |
| qemu_free_vlan_client(vc); |
| } |
| |
| VLANClientState * |
| qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id, |
| const char *client_str) |
| { |
| VLANState *vlan; |
| VLANClientState *vc; |
| |
| vlan = qemu_find_vlan(vlan_id, 0); |
| if (!vlan) { |
| monitor_printf(mon, "unknown VLAN %d\n", vlan_id); |
| return NULL; |
| } |
| |
| QTAILQ_FOREACH(vc, &vlan->clients, next) { |
| if (!strcmp(vc->name, client_str)) { |
| break; |
| } |
| } |
| if (!vc) { |
| monitor_printf(mon, "can't find device %s on VLAN %d\n", |
| client_str, vlan_id); |
| } |
| |
| return vc; |
| } |
| |
| void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) |
| { |
| VLANClientState *nc; |
| VLANState *vlan; |
| |
| QTAILQ_FOREACH(nc, &non_vlan_clients, next) { |
| if (nc->info->type == NET_CLIENT_TYPE_NIC) { |
| func(DO_UPCAST(NICState, nc, nc), opaque); |
| } |
| } |
| |
| QTAILQ_FOREACH(vlan, &vlans, next) { |
| QTAILQ_FOREACH(nc, &vlan->clients, next) { |
| if (nc->info->type == NET_CLIENT_TYPE_NIC) { |
| func(DO_UPCAST(NICState, nc, nc), opaque); |
| } |
| } |
| } |
| } |
| |
| int qemu_can_send_packet(VLANClientState *sender) |
| { |
| VLANState *vlan = sender->vlan; |
| VLANClientState *vc; |
| |
| if (sender->peer) { |
| if (sender->peer->receive_disabled) { |
| return 0; |
| } else if (sender->peer->info->can_receive && |
| !sender->peer->info->can_receive(sender->peer)) { |
| return 0; |
| } else { |
| return 1; |
| } |
| } |
| |
| if (!sender->vlan) { |
| return 1; |
| } |
| |
| QTAILQ_FOREACH(vc, &vlan->clients, next) { |
| if (vc == sender) { |
| continue; |
| } |
| |
| /* no can_receive() handler, they can always receive */ |
| if (vc->info->can_receive && !vc->info->can_receive(vc)) { |
| return 0; |
| } |
| } |
| return 1; |
| } |
| |
| static ssize_t qemu_deliver_packet(VLANClientState *sender, |
| unsigned flags, |
| const uint8_t *data, |
| size_t size, |
| void *opaque) |
| { |
| VLANClientState *vc = opaque; |
| ssize_t ret; |
| |
| if (vc->link_down) { |
| return size; |
| } |
| |
| if (vc->receive_disabled) { |
| return 0; |
| } |
| |
| if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->info->receive_raw) { |
| ret = vc->info->receive_raw(vc, data, size); |
| } else { |
| ret = vc->info->receive(vc, data, size); |
| } |
| |
| if (ret == 0) { |
| vc->receive_disabled = 1; |
| }; |
| |
| return ret; |
| } |
| |
| static ssize_t qemu_vlan_deliver_packet(VLANClientState *sender, |
| unsigned flags, |
| const uint8_t *buf, |
| size_t size, |
| void *opaque) |
| { |
| VLANState *vlan = opaque; |
| VLANClientState *vc; |
| ssize_t ret = -1; |
| |
| QTAILQ_FOREACH(vc, &vlan->clients, next) { |
| ssize_t len; |
| |
| if (vc == sender) { |
| continue; |
| } |
| |
| if (vc->link_down) { |
| ret = size; |
| continue; |
| } |
| |
| if (vc->receive_disabled) { |
| ret = 0; |
| continue; |
| } |
| |
| if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->info->receive_raw) { |
| len = vc->info->receive_raw(vc, buf, size); |
| } else { |
| len = vc->info->receive(vc, buf, size); |
| } |
| |
| if (len == 0) { |
| vc->receive_disabled = 1; |
| } |
| |
| ret = (ret >= 0) ? ret : len; |
| |
| } |
| |
| return ret; |
| } |
| |
| void qemu_purge_queued_packets(VLANClientState *vc) |
| { |
| NetQueue *queue; |
| |
| if (!vc->peer && !vc->vlan) { |
| return; |
| } |
| |
| if (vc->peer) { |
| queue = vc->peer->send_queue; |
| } else { |
| queue = vc->vlan->send_queue; |
| } |
| |
| qemu_net_queue_purge(queue, vc); |
| } |
| |
| void qemu_flush_queued_packets(VLANClientState *vc) |
| { |
| NetQueue *queue; |
| |
| vc->receive_disabled = 0; |
| |
| if (vc->vlan) { |
| queue = vc->vlan->send_queue; |
| } else { |
| queue = vc->send_queue; |
| } |
| |
| qemu_net_queue_flush(queue); |
| } |
| |
| static ssize_t qemu_send_packet_async_with_flags(VLANClientState *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 && !sender->vlan)) { |
| return size; |
| } |
| |
| if (sender->peer) { |
| queue = sender->peer->send_queue; |
| } else { |
| queue = sender->vlan->send_queue; |
| } |
| |
| return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); |
| } |
| |
| ssize_t qemu_send_packet_async(VLANClientState *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(VLANClientState *vc, const uint8_t *buf, int size) |
| { |
| qemu_send_packet_async(vc, buf, size, NULL); |
| } |
| |
| ssize_t qemu_send_packet_raw(VLANClientState *vc, const uint8_t *buf, int size) |
| { |
| return qemu_send_packet_async_with_flags(vc, QEMU_NET_PACKET_FLAG_RAW, |
| buf, size, NULL); |
| } |
| |
| static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov, |
| int iovcnt) |
| { |
| uint8_t buffer[4096]; |
| size_t offset; |
| |
| offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer)); |
| |
| return vc->info->receive(vc, buffer, offset); |
| } |
| |
| static ssize_t qemu_deliver_packet_iov(VLANClientState *sender, |
| unsigned flags, |
| const struct iovec *iov, |
| int iovcnt, |
| void *opaque) |
| { |
| VLANClientState *vc = opaque; |
| |
| if (vc->link_down) { |
| return iov_size(iov, iovcnt); |
| } |
| |
| if (vc->info->receive_iov) { |
| return vc->info->receive_iov(vc, iov, iovcnt); |
| } else { |
| return vc_sendv_compat(vc, iov, iovcnt); |
| } |
| } |
| |
| static ssize_t qemu_vlan_deliver_packet_iov(VLANClientState *sender, |
| unsigned flags, |
| const struct iovec *iov, |
| int iovcnt, |
| void *opaque) |
| { |
| VLANState *vlan = opaque; |
| VLANClientState *vc; |
| ssize_t ret = -1; |
| |
| QTAILQ_FOREACH(vc, &vlan->clients, next) { |
| ssize_t len; |
| |
| if (vc == sender) { |
| continue; |
| } |
| |
| if (vc->link_down) { |
| ret = iov_size(iov, iovcnt); |
| continue; |
| } |
| |
| assert(!(flags & QEMU_NET_PACKET_FLAG_RAW)); |
| |
| if (vc->info->receive_iov) { |
| len = vc->info->receive_iov(vc, iov, iovcnt); |
| } else { |
| len = vc_sendv_compat(vc, iov, iovcnt); |
| } |
| |
| ret = (ret >= 0) ? ret : len; |
| } |
| |
| return ret; |
| } |
| |
| ssize_t qemu_sendv_packet_async(VLANClientState *sender, |
| const struct iovec *iov, int iovcnt, |
| NetPacketSent *sent_cb) |
| { |
| NetQueue *queue; |
| |
| if (sender->link_down || (!sender->peer && !sender->vlan)) { |
| return iov_size(iov, iovcnt); |
| } |
| |
| if (sender->peer) { |
| queue = sender->peer->send_queue; |
| } else { |
| queue = sender->vlan->send_queue; |
| } |
| |
| return qemu_net_queue_send_iov(queue, sender, |
| QEMU_NET_PACKET_FLAG_NONE, |
| iov, iovcnt, sent_cb); |
| } |
| |
| ssize_t |
| qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt) |
| { |
| return qemu_sendv_packet_async(vc, iov, iovcnt, NULL); |
| } |
| |
| /* find or alloc a new VLAN */ |
| VLANState *qemu_find_vlan(int id, int allocate) |
| { |
| VLANState *vlan; |
| |
| QTAILQ_FOREACH(vlan, &vlans, next) { |
| if (vlan->id == id) { |
| return vlan; |
| } |
| } |
| |
| if (!allocate) { |
| return NULL; |
| } |
| |
| vlan = g_malloc0(sizeof(VLANState)); |
| vlan->id = id; |
| QTAILQ_INIT(&vlan->clients); |
| |
| vlan->send_queue = qemu_new_net_queue(qemu_vlan_deliver_packet, |
| qemu_vlan_deliver_packet_iov, |
| vlan); |
| |
| QTAILQ_INSERT_TAIL(&vlans, vlan, next); |
| |
| return vlan; |
| } |
| |
| VLANClientState *qemu_find_netdev(const char *id) |
| { |
| VLANClientState *vc; |
| |
| QTAILQ_FOREACH(vc, &non_vlan_clients, next) { |
| if (vc->info->type == NET_CLIENT_TYPE_NIC) |
| continue; |
| if (!strcmp(vc->name, id)) { |
| return vc; |
| } |
| } |
| |
| 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 || strcmp(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; |
| } |
| |
| int net_handle_fd_param(Monitor *mon, const char *param) |
| { |
| int fd; |
| |
| if (!qemu_isdigit(param[0]) && mon) { |
| |
| fd = monitor_get_fd(mon, param); |
| if (fd == -1) { |
| error_report("No file descriptor named %s found", param); |
| return -1; |
| } |
| } else { |
| fd = qemu_parse_fd(param); |
| } |
| |
| return fd; |
| } |
| |
| static int net_init_nic(QemuOpts *opts, const char *name, VLANState *vlan) |
| { |
| int idx; |
| NICInfo *nd; |
| const char *netdev; |
| |
| 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 ((netdev = qemu_opt_get(opts, "netdev"))) { |
| nd->netdev = qemu_find_netdev(netdev); |
| if (!nd->netdev) { |
| error_report("netdev '%s' not found", netdev); |
| return -1; |
| } |
| } else { |
| assert(vlan); |
| nd->vlan = vlan; |
| } |
| if (name) { |
| nd->name = g_strdup(name); |
| } |
| if (qemu_opt_get(opts, "model")) { |
| nd->model = g_strdup(qemu_opt_get(opts, "model")); |
| } |
| if (qemu_opt_get(opts, "addr")) { |
| nd->devaddr = g_strdup(qemu_opt_get(opts, "addr")); |
| } |
| |
| if (qemu_opt_get(opts, "macaddr") && |
| net_parse_macaddr(nd->macaddr.a, qemu_opt_get(opts, "macaddr")) < 0) { |
| error_report("invalid syntax for ethernet address"); |
| return -1; |
| } |
| qemu_macaddr_default_if_unset(&nd->macaddr); |
| |
| nd->nvectors = qemu_opt_get_number(opts, "vectors", |
| DEV_NVECTORS_UNSPECIFIED); |
| if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED && |
| (nd->nvectors < 0 || nd->nvectors > 0x7ffffff)) { |
| error_report("invalid # of vectors: %d", nd->nvectors); |
| return -1; |
| } |
| |
| nd->used = 1; |
| nb_nics++; |
| |
| return idx; |
| } |
| |
| #define NET_COMMON_PARAMS_DESC \ |
| { \ |
| .name = "type", \ |
| .type = QEMU_OPT_STRING, \ |
| .help = "net client type (nic, tap etc.)", \ |
| }, { \ |
| .name = "vlan", \ |
| .type = QEMU_OPT_NUMBER, \ |
| .help = "vlan number", \ |
| }, { \ |
| .name = "name", \ |
| .type = QEMU_OPT_STRING, \ |
| .help = "identifier for monitor commands", \ |
| } |
| |
| typedef int (*net_client_init_func)(QemuOpts *opts, |
| const char *name, |
| VLANState *vlan); |
| |
| /* magic number, but compiler will warn if too small */ |
| #define NET_MAX_DESC 20 |
| |
| static const struct { |
| const char *type; |
| net_client_init_func init; |
| QemuOptDesc desc[NET_MAX_DESC]; |
| } net_client_types[NET_CLIENT_TYPE_MAX] = { |
| [NET_CLIENT_TYPE_NONE] = { |
| .type = "none", |
| .desc = { |
| NET_COMMON_PARAMS_DESC, |
| { /* end of list */ } |
| }, |
| }, |
| [NET_CLIENT_TYPE_NIC] = { |
| .type = "nic", |
| .init = net_init_nic, |
| .desc = { |
| NET_COMMON_PARAMS_DESC, |
| { |
| .name = "netdev", |
| .type = QEMU_OPT_STRING, |
| .help = "id of -netdev to connect to", |
| }, |
| { |
| .name = "macaddr", |
| .type = QEMU_OPT_STRING, |
| .help = "MAC address", |
| }, { |
| .name = "model", |
| .type = QEMU_OPT_STRING, |
| .help = "device model (e1000, rtl8139, virtio etc.)", |
| }, { |
| .name = "addr", |
| .type = QEMU_OPT_STRING, |
| .help = "PCI device address", |
| }, { |
| .name = "vectors", |
| .type = QEMU_OPT_NUMBER, |
| .help = "number of MSI-x vectors, 0 to disable MSI-X", |
| }, |
| { /* end of list */ } |
| }, |
| }, |
| #ifdef CONFIG_SLIRP |
| [NET_CLIENT_TYPE_USER] = { |
| .type = "user", |
| .init = net_init_slirp, |
| .desc = { |
| NET_COMMON_PARAMS_DESC, |
| { |
| .name = "hostname", |
| .type = QEMU_OPT_STRING, |
| .help = "client hostname reported by the builtin DHCP server", |
| }, { |
| .name = "restrict", |
| .type = QEMU_OPT_STRING, |
| .help = "isolate the guest from the host (y|yes|n|no)", |
| }, { |
| .name = "ip", |
| .type = QEMU_OPT_STRING, |
| .help = "legacy parameter, use net= instead", |
| }, { |
| .name = "net", |
| .type = QEMU_OPT_STRING, |
| .help = "IP address and optional netmask", |
| }, { |
| .name = "host", |
| .type = QEMU_OPT_STRING, |
| .help = "guest-visible address of the host", |
| }, { |
| .name = "tftp", |
| .type = QEMU_OPT_STRING, |
| .help = "root directory of the built-in TFTP server", |
| }, { |
| .name = "bootfile", |
| .type = QEMU_OPT_STRING, |
| .help = "BOOTP filename, for use with tftp=", |
| }, { |
| .name = "dhcpstart", |
| .type = QEMU_OPT_STRING, |
| .help = "the first of the 16 IPs the built-in DHCP server can assign", |
| }, { |
| .name = "dns", |
| .type = QEMU_OPT_STRING, |
| .help = "guest-visible address of the virtual nameserver", |
| }, { |
| .name = "smb", |
| .type = QEMU_OPT_STRING, |
| .help = "root directory of the built-in SMB server", |
| }, { |
| .name = "smbserver", |
| .type = QEMU_OPT_STRING, |
| .help = "IP address of the built-in SMB server", |
| }, { |
| .name = "hostfwd", |
| .type = QEMU_OPT_STRING, |
| .help = "guest port number to forward incoming TCP or UDP connections", |
| }, { |
| .name = "guestfwd", |
| .type = QEMU_OPT_STRING, |
| .help = "IP address and port to forward guest TCP connections", |
| }, |
| { /* end of list */ } |
| }, |
| }, |
| #endif |
| [NET_CLIENT_TYPE_TAP] = { |
| .type = "tap", |
| .init = net_init_tap, |
| .desc = { |
| NET_COMMON_PARAMS_DESC, |
| { |
| .name = "ifname", |
| .type = QEMU_OPT_STRING, |
| .help = "interface name", |
| }, |
| #ifndef _WIN32 |
| { |
| .name = "fd", |
| .type = QEMU_OPT_STRING, |
| .help = "file descriptor of an already opened tap", |
| }, { |
| .name = "script", |
| .type = QEMU_OPT_STRING, |
| .help = "script to initialize the interface", |
| }, { |
| .name = "downscript", |
| .type = QEMU_OPT_STRING, |
| .help = "script to shut down the interface", |
| }, { |
| #ifdef CONFIG_NET_BRIDGE |
| .name = "helper", |
| .type = QEMU_OPT_STRING, |
| .help = "command to execute to configure bridge", |
| }, { |
| #endif |
| .name = "sndbuf", |
| .type = QEMU_OPT_SIZE, |
| .help = "send buffer limit" |
| }, { |
| .name = "vnet_hdr", |
| .type = QEMU_OPT_BOOL, |
| .help = "enable the IFF_VNET_HDR flag on the tap interface" |
| }, { |
| .name = "vhost", |
| .type = QEMU_OPT_BOOL, |
| .help = "enable vhost-net network accelerator", |
| }, { |
| .name = "vhostfd", |
| .type = QEMU_OPT_STRING, |
| .help = "file descriptor of an already opened vhost net device", |
| }, { |
| .name = "vhostforce", |
| .type = QEMU_OPT_BOOL, |
| .help = "force vhost on for non-MSIX virtio guests", |
| }, |
| #endif /* _WIN32 */ |
| { /* end of list */ } |
| }, |
| }, |
| [NET_CLIENT_TYPE_SOCKET] = { |
| .type = "socket", |
| .init = net_init_socket, |
| .desc = { |
| NET_COMMON_PARAMS_DESC, |
| { |
| .name = "fd", |
| .type = QEMU_OPT_STRING, |
| .help = "file descriptor of an already opened socket", |
| }, { |
| .name = "listen", |
| .type = QEMU_OPT_STRING, |
| .help = "port number, and optional hostname, to listen on", |
| }, { |
| .name = "connect", |
| .type = QEMU_OPT_STRING, |
| .help = "port number, and optional hostname, to connect to", |
| }, { |
| .name = "mcast", |
| .type = QEMU_OPT_STRING, |
| .help = "UDP multicast address and port number", |
| }, { |
| .name = "localaddr", |
| .type = QEMU_OPT_STRING, |
| .help = "source address and port for multicast and udp packets", |
| }, { |
| .name = "udp", |
| .type = QEMU_OPT_STRING, |
| .help = "UDP unicast address and port number", |
| }, |
| { /* end of list */ } |
| }, |
| }, |
| #ifdef CONFIG_VDE |
| [NET_CLIENT_TYPE_VDE] = { |
| .type = "vde", |
| .init = net_init_vde, |
| .desc = { |
| NET_COMMON_PARAMS_DESC, |
| { |
| .name = "sock", |
| .type = QEMU_OPT_STRING, |
| .help = "socket path", |
| }, { |
| .name = "port", |
| .type = QEMU_OPT_NUMBER, |
| .help = "port number", |
| }, { |
| .name = "group", |
| .type = QEMU_OPT_STRING, |
| .help = "group owner of socket", |
| }, { |
| .name = "mode", |
| .type = QEMU_OPT_NUMBER, |
| .help = "permissions for socket", |
| }, |
| { /* end of list */ } |
| }, |
| }, |
| #endif |
| [NET_CLIENT_TYPE_DUMP] = { |
| .type = "dump", |
| .init = net_init_dump, |
| .desc = { |
| NET_COMMON_PARAMS_DESC, |
| { |
| .name = "len", |
| .type = QEMU_OPT_SIZE, |
| .help = "per-packet size limit (64k default)", |
| }, { |
| .name = "file", |
| .type = QEMU_OPT_STRING, |
| .help = "dump file path (default is qemu-vlan0.pcap)", |
| }, |
| { /* end of list */ } |
| }, |
| }, |
| #ifdef CONFIG_NET_BRIDGE |
| [NET_CLIENT_TYPE_BRIDGE] = { |
| .type = "bridge", |
| .init = net_init_bridge, |
| .desc = { |
| NET_COMMON_PARAMS_DESC, |
| { |
| .name = "br", |
| .type = QEMU_OPT_STRING, |
| .help = "bridge name", |
| }, { |
| .name = "helper", |
| .type = QEMU_OPT_STRING, |
| .help = "command to execute to configure bridge", |
| }, |
| { /* end of list */ } |
| }, |
| }, |
| #endif /* CONFIG_NET_BRIDGE */ |
| }; |
| |
| int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) |
| { |
| const char *name; |
| const char *type; |
| int i; |
| |
| type = qemu_opt_get(opts, "type"); |
| if (!type) { |
| error_set(errp, QERR_MISSING_PARAMETER, "type"); |
| return -1; |
| } |
| |
| if (is_netdev) { |
| if (strcmp(type, "tap") != 0 && |
| #ifdef CONFIG_NET_BRIDGE |
| strcmp(type, "bridge") != 0 && |
| #endif |
| #ifdef CONFIG_SLIRP |
| strcmp(type, "user") != 0 && |
| #endif |
| #ifdef CONFIG_VDE |
| strcmp(type, "vde") != 0 && |
| #endif |
| strcmp(type, "socket") != 0) { |
| error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", |
| "a netdev backend type"); |
| return -1; |
| } |
| |
| if (qemu_opt_get(opts, "vlan")) { |
| error_set(errp, QERR_INVALID_PARAMETER, "vlan"); |
| return -1; |
| } |
| if (qemu_opt_get(opts, "name")) { |
| error_set(errp, QERR_INVALID_PARAMETER, "name"); |
| return -1; |
| } |
| if (!qemu_opts_id(opts)) { |
| error_set(errp, QERR_MISSING_PARAMETER, "id"); |
| return -1; |
| } |
| } |
| |
| name = qemu_opts_id(opts); |
| if (!name) { |
| name = qemu_opt_get(opts, "name"); |
| } |
| |
| for (i = 0; i < NET_CLIENT_TYPE_MAX; i++) { |
| if (net_client_types[i].type != NULL && |
| !strcmp(net_client_types[i].type, type)) { |
| Error *local_err = NULL; |
| VLANState *vlan = NULL; |
| int ret; |
| |
| qemu_opts_validate(opts, &net_client_types[i].desc[0], &local_err); |
| if (error_is_set(&local_err)) { |
| error_propagate(errp, local_err); |
| return -1; |
| } |
| |
| /* Do not add to a vlan if it's a -netdev or a nic with a |
| * netdev= parameter. */ |
| if (!(is_netdev || |
| (strcmp(type, "nic") == 0 && qemu_opt_get(opts, "netdev")))) { |
| vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1); |
| } |
| |
| ret = 0; |
| if (net_client_types[i].init) { |
| ret = net_client_types[i].init(opts, name, vlan); |
| if (ret < 0) { |
| /* TODO push error reporting into init() methods */ |
| error_set(errp, QERR_DEVICE_INIT_FAILED, type); |
| return -1; |
| } |
| } |
| return ret; |
| } |
| } |
| |
| error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", |
| "a network client type"); |
| return -1; |
| } |
| |
| 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) |
| { |
| VLANClientState *vc; |
| int vlan_id = qdict_get_int(qdict, "vlan_id"); |
| const char *device = qdict_get_str(qdict, "device"); |
| |
| vc = qemu_find_vlan_client_by_name(mon, vlan_id, device); |
| if (!vc) { |
| return; |
| } |
| if (!net_host_check_device(vc->model)) { |
| monitor_printf(mon, "invalid host network device %s\n", device); |
| return; |
| } |
| qemu_del_vlan_client(vc); |
| } |
| |
| 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) |
| { |
| VLANClientState *vc; |
| |
| vc = qemu_find_netdev(id); |
| if (!vc) { |
| error_set(errp, QERR_DEVICE_NOT_FOUND, id); |
| return; |
| } |
| |
| qemu_del_vlan_client(vc); |
| qemu_opts_del(qemu_opts_find(qemu_find_opts_err("netdev", errp), id)); |
| } |
| |
| static void print_net_client(Monitor *mon, VLANClientState *vc) |
| { |
| monitor_printf(mon, "%s: type=%s,%s\n", vc->name, |
| net_client_types[vc->info->type].type, vc->info_str); |
| } |
| |
| void do_info_network(Monitor *mon) |
| { |
| VLANState *vlan; |
| VLANClientState *vc, *peer; |
| net_client_type type; |
| |
| QTAILQ_FOREACH(vlan, &vlans, next) { |
| monitor_printf(mon, "VLAN %d devices:\n", vlan->id); |
| |
| QTAILQ_FOREACH(vc, &vlan->clients, next) { |
| monitor_printf(mon, " "); |
| print_net_client(mon, vc); |
| } |
| } |
| monitor_printf(mon, "Devices not on any VLAN:\n"); |
| QTAILQ_FOREACH(vc, &non_vlan_clients, next) { |
| peer = vc->peer; |
| type = vc->info->type; |
| if (!peer || type == NET_CLIENT_TYPE_NIC) { |
| monitor_printf(mon, " "); |
| print_net_client(mon, vc); |
| } /* else it's a netdev connected to a NIC, printed with the NIC */ |
| if (peer && type == NET_CLIENT_TYPE_NIC) { |
| monitor_printf(mon, " \\ "); |
| print_net_client(mon, peer); |
| } |
| } |
| } |
| |
| void qmp_set_link(const char *name, bool up, Error **errp) |
| { |
| VLANState *vlan; |
| VLANClientState *vc = NULL; |
| |
| QTAILQ_FOREACH(vlan, &vlans, next) { |
| QTAILQ_FOREACH(vc, &vlan->clients, next) { |
| if (strcmp(vc->name, name) == 0) { |
| goto done; |
| } |
| } |
| } |
| QTAILQ_FOREACH(vc, &non_vlan_clients, next) { |
| if (!strcmp(vc->name, name)) { |
| goto done; |
| } |
| } |
| done: |
| |
| if (!vc) { |
| error_set(errp, QERR_DEVICE_NOT_FOUND, name); |
| return; |
| } |
| |
| vc->link_down = !up; |
| |
| if (vc->info->link_status_changed) { |
| vc->info->link_status_changed(vc); |
| } |
| |
| /* 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 (vc->peer && vc->peer->info->link_status_changed) { |
| vc->peer->info->link_status_changed(vc->peer); |
| } |
| } |
| |
| void net_cleanup(void) |
| { |
| VLANState *vlan; |
| VLANClientState *vc, *next_vc; |
| |
| QTAILQ_FOREACH(vlan, &vlans, next) { |
| QTAILQ_FOREACH_SAFE(vc, &vlan->clients, next, next_vc) { |
| qemu_del_vlan_client(vc); |
| } |
| } |
| |
| QTAILQ_FOREACH_SAFE(vc, &non_vlan_clients, next, next_vc) { |
| qemu_del_vlan_client(vc); |
| } |
| } |
| |
| void net_check_clients(void) |
| { |
| VLANState *vlan; |
| VLANClientState *vc; |
| 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; |
| } |
| |
| QTAILQ_FOREACH(vlan, &vlans, next) { |
| int has_nic = 0, has_host_dev = 0; |
| |
| QTAILQ_FOREACH(vc, &vlan->clients, next) { |
| switch (vc->info->type) { |
| case NET_CLIENT_TYPE_NIC: |
| has_nic = 1; |
| break; |
| case NET_CLIENT_TYPE_USER: |
| case NET_CLIENT_TYPE_TAP: |
| case NET_CLIENT_TYPE_SOCKET: |
| case NET_CLIENT_TYPE_VDE: |
| has_host_dev = 1; |
| break; |
| default: ; |
| } |
| } |
| if (has_host_dev && !has_nic) |
| fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id); |
| if (has_nic && !has_host_dev) |
| fprintf(stderr, |
| "Warning: vlan %d is not connected to host network\n", |
| vlan->id); |
| } |
| QTAILQ_FOREACH(vc, &non_vlan_clients, next) { |
| if (!vc->peer) { |
| fprintf(stderr, "Warning: %s %s has no peer\n", |
| vc->info->type == NET_CLIENT_TYPE_NIC ? "nic" : "netdev", |
| vc->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(&vlans); |
| QTAILQ_INIT(&non_vlan_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; |
| } |