/* * 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, buffer, 0, 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; }