static TAPState *net_tap_fd_init(NetClientState *peer,
const char *model,
const char *name,
int fd,
int vnet_hdr)
{
NetClientState *nc;
TAPState *s;
nc = qemu_new_net_client(&net_tap_info, peer, model, name);
s = DO_UPCAST(TAPState, nc, nc);
s->fd = fd;
s->host_vnet_hdr_len = vnet_hdr ? sizeof(struct virtio_net_hdr) : 0;
s->using_vnet_hdr = false;
s->has_ufo = tap_probe_has_ufo(s->fd);
s->enabled = true;
tap_set_offload(&s->nc, 0, 0, 0, 0, 0);
/*
* Make sure host header length is set correctly in tap:
* it might have been modified by another instance of qemu.
*/
if (tap_probe_vnet_hdr_len(s->fd, s->host_vnet_hdr_len)) {
tap_fd_set_vnet_hdr_len(s->fd, s->host_vnet_hdr_len);
}
tap_read_poll(s, true);
s->vhost_net = NULL;
return s;
}
static int tap_win32_init(VLANState *vlan, const char *model,
const char *name, const char *ifname)
{
VLANClientState *nc;
TAPState *s;
tap_win32_overlapped_t *handle;
if (tap_win32_open(&handle, ifname) < 0) {
printf("tap: Could not open '%s'\n", ifname);
return -1;
}
nc = qemu_new_net_client(&net_tap_win32_info, vlan, NULL, model, name);
s = DO_UPCAST(TAPState, nc, nc);
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
"tap: ifname=%s", ifname);
s->handle = handle;
qemu_add_wait_object(s->handle->tap_semaphore, tap_win32_send, s);
return 0;
}
/* The exported init function
*
* ... -net netmap,ifname="..."
*/
int net_init_netmap(const Netdev *netdev,
const char *name, NetClientState *peer, Error **errp)
{
const NetdevNetmapOptions *netmap_opts = &netdev->u.netmap;
struct nm_desc *nmd;
NetClientState *nc;
Error *err = NULL;
NetmapState *s;
nmd = netmap_open(netmap_opts, &err);
if (err) {
error_propagate(errp, err);
return -1;
}
/* Create the object. */
nc = qemu_new_net_client(&net_netmap_info, peer, "netmap", name);
s = DO_UPCAST(NetmapState, nc, nc);
s->nmd = nmd;
s->tx = NETMAP_TXRING(nmd->nifp, 0);
s->rx = NETMAP_RXRING(nmd->nifp, 0);
s->vnet_hdr_len = 0;
pstrcpy(s->ifname, sizeof(s->ifname), netmap_opts->ifname);
netmap_read_poll(s, true); /* Initially only poll for reads. */
return 0;
}
static int net_vhost_user_init(NetClientState *peer, const char *device,
const char *name, CharDriverState *chr,
int queues)
{
NetClientState *nc;
VhostUserState *s;
int i;
assert(name);
assert(queues > 0);
for (i = 0; i < queues; i++) {
nc = qemu_new_net_client(&net_vhost_user_info, peer, device, name);
snprintf(nc->info_str, sizeof(nc->info_str), "vhost-user%d to %s",
i, chr->label);
nc->queue_index = i;
s = DO_UPCAST(VhostUserState, nc, nc);
s->chr = chr;
}
qemu_chr_add_handlers(chr, NULL, NULL, net_vhost_user_event, nc[0].name);
return 0;
}
static int net_vde_init(NetClientState *peer, const char *model,
const char *name, const char *sock,
int port, const char *group, int mode)
{
NetClientState *nc;
VDEState *s;
VDECONN *vde;
char *init_group = (char *)group;
char *init_sock = (char *)sock;
struct vde_open_args args = {
.port = port,
.group = init_group,
.mode = mode,
};
vde = vde_open(init_sock, (char *)"QEMU", &args);
if (!vde){
return -1;
}
nc = qemu_new_net_client(&net_vde_info, peer, model, name);
snprintf(nc->info_str, sizeof(nc->info_str), "sock=%s,fd=%d",
sock, vde_datafd(vde));
s = DO_UPCAST(VDEState, nc, nc);
s->vde = vde;
qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
return 0;
}
static int net_socket_listen_init(NetClientState *peer,
const char *model,
const char *name,
const char *host_str)
{
NetClientState *nc;
NetSocketState *s;
struct sockaddr_in saddr;
int fd, val, ret;
if (parse_host_port(&saddr, host_str) < 0)
return -1;
fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
if (fd < 0) {
perror("socket");
return -1;
}
socket_set_nonblock(fd);
/* allow fast reuse */
val = 1;
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
if (ret < 0) {
perror("bind");
closesocket(fd);
return -1;
}
ret = listen(fd, 0);
if (ret < 0) {
perror("listen");
closesocket(fd);
return -1;
}
nc = qemu_new_net_client(&net_socket_info, peer, model, name);
s = DO_UPCAST(NetSocketState, nc, nc);
s->fd = -1;
s->listen_fd = fd;
s->nc.link_down = true;
qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s);
return 0;
}
static int net_dump_init(NetClientState *peer, const char *device,
const char *name, const char *filename, int len,
Error **errp)
{
struct pcap_file_hdr hdr;
NetClientState *nc;
DumpState *s;
struct tm tm;
int fd;
fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY | O_BINARY, 0644);
if (fd < 0) {
error_setg_errno(errp, errno, "-net dump: can't open %s", filename);
return -1;
}
hdr.magic = PCAP_MAGIC;
hdr.version_major = 2;
hdr.version_minor = 4;
hdr.thiszone = 0;
hdr.sigfigs = 0;
hdr.snaplen = len;
hdr.linktype = 1;
if (write(fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
error_setg_errno(errp, errno, "-net dump write error");
close(fd);
return -1;
}
nc = qemu_new_net_client(&net_dump_info, peer, device, name);
snprintf(nc->info_str, sizeof(nc->info_str),
"dump to %s (len=%d)", filename, len);
s = DO_UPCAST(DumpState, nc, nc);
s->fd = fd;
s->pcap_caplen = len;
qemu_get_timedate(&tm, 0);
s->start_ts = mktime(&tm);
return 0;
}
static int net_vhost_user_init(NetClientState *peer, const char *device,
const char *name, Chardev *chr,
int queues)
{
Error *err = NULL;
NetClientState *nc, *nc0 = NULL;
VhostUserState *s;
int i;
assert(name);
assert(queues > 0);
for (i = 0; i < queues; i++) {
nc = qemu_new_net_client(&net_vhost_user_info, peer, device, name);
snprintf(nc->info_str, sizeof(nc->info_str), "vhost-user%d to %s",
i, chr->label);
nc->queue_index = i;
if (!nc0) {
nc0 = nc;
s = DO_UPCAST(VhostUserState, nc, nc);
if (!qemu_chr_fe_init(&s->chr, chr, &err)) {
error_report_err(err);
return -1;
}
}
}
s = DO_UPCAST(VhostUserState, nc, nc0);
do {
if (qemu_chr_fe_wait_connected(&s->chr, &err) < 0) {
error_report_err(err);
return -1;
}
qemu_chr_fe_set_handlers(&s->chr, NULL, NULL,
net_vhost_user_event, NULL, nc0->name, NULL,
true);
} while (!s->started);
assert(s->vhost_net);
return 0;
}
static TAPState *net_tap_fd_init(VLANState *vlan,
const char *model,
const char *name,
int fd,
int vnet_hdr)
{
VLANClientState *nc;
TAPState *s;
nc = qemu_new_net_client(&net_tap_info, vlan, NULL, model, name);
s = DO_UPCAST(TAPState, nc, nc);
s->fd = fd;
s->has_vnet_hdr = vnet_hdr != 0;
s->using_vnet_hdr = 0;
s->has_ufo = tap_probe_has_ufo(s->fd);
tap_set_offload(&s->nc, 0, 0, 0, 0, 0);
tap_read_poll(s, 1);
return s;
}
static int net_vhost_user_init(NetClientState *peer, const char *device,
const char *name, CharDriverState *chr)
{
NetClientState *nc;
VhostUserState *s;
nc = qemu_new_net_client(&net_vhost_user_info, peer, device, name);
snprintf(nc->info_str, sizeof(nc->info_str), "vhost-user to %s",
chr->label);
s = DO_UPCAST(VhostUserState, nc, nc);
/* We don't provide a receive callback */
s->nc.receive_disabled = 1;
s->chr = chr;
qemu_chr_add_handlers(s->chr, NULL, NULL, net_vhost_user_event, s);
return 0;
}
static TAPState *net_tap_fd_init(NetClientState *peer,
const char *model,
const char *name,
int fd,
int vnet_hdr)
{
NetClientState *nc;
TAPState *s;
nc = qemu_new_net_client(&net_tap_info, peer, model, name);
s = DO_UPCAST(TAPState, nc, nc);
s->fd = fd;
s->host_vnet_hdr_len = vnet_hdr ? sizeof(struct virtio_net_hdr) : 0;
s->using_vnet_hdr = 0;
s->has_ufo = tap_probe_has_ufo(s->fd);
tap_set_offload(&s->nc, 0, 0, 0, 0, 0);
tap_read_poll(s, 1);
s->vhost_net = NULL;
return s;
}
static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
const char *model,
const char *name,
int fd, int is_connected)
{
VLANClientState *nc;
NetSocketState *s;
nc = qemu_new_net_client(&net_socket_info, vlan, NULL, model, name);
snprintf(nc->info_str, sizeof(nc->info_str), "socket: fd=%d", fd);
s = DO_UPCAST(NetSocketState, nc, nc);
s->fd = fd;
if (is_connected) {
net_socket_connect(s);
} else {
qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
}
return s;
}
static NetSocketState *net_socket_fd_init_dgram(NetClientState *peer,
const char *model,
const char *name,
int fd, int is_connected)
{
struct sockaddr_in saddr;
int newfd;
socklen_t saddr_len;
NetClientState *nc;
NetSocketState *s;
/* fd passed: multicast: "learn" dgram_dst address from bound address and save it
* Because this may be "shared" socket from a "master" process, datagrams would be recv()
* by ONLY ONE process: we must "clone" this dgram socket --jjo
*/
if (is_connected) {
if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
/* must be bound */
if (saddr.sin_addr.s_addr == 0) {
fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, "
"cannot setup multicast dst addr\n", fd);
goto err;
}
/* clone dgram socket */
newfd = net_socket_mcast_create(&saddr, NULL);
if (newfd < 0) {
/* error already reported by net_socket_mcast_create() */
goto err;
}
/* clone newfd to fd, close newfd */
dup2(newfd, fd);
close(newfd);
} else {
fprintf(stderr,
"qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
fd, strerror(errno));
goto err;
}
}
nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name);
snprintf(nc->info_str, sizeof(nc->info_str),
"socket: fd=%d (%s mcast=%s:%d)",
fd, is_connected ? "cloned" : "",
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
s = DO_UPCAST(NetSocketState, nc, nc);
s->fd = fd;
s->listen_fd = -1;
qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
/* mcast: save bound address as dst */
if (is_connected) {
s->dgram_dst = saddr;
}
return s;
err:
closesocket(fd);
return NULL;
}
int
net_init_vnic(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan)
{
int fd, len, vnderr, syserr;
const char *ifname, *mac;
uchar_t *macaddr;
VLANClientState *ncp;
VNICState *vsp;
vnd_prop_buf_t vib;
if ((ifname = qemu_opt_get(opts, "ifname")) == NULL) {
error_report("missing ifname required for vnic\n");
return (-1);
}
mac = qemu_opt_get(opts, "macaddr");
if (mac != NULL) {
macaddr = _link_aton(mac, &len);
if (macaddr == NULL || len != ETHERADDRL) {
error_report("invalid macaddr for vnic: %s\n", mac);
return (-1);
}
}
ncp = qemu_new_net_client(&net_vnic_info, vlan, NULL, "vnic", name);
vsp = DO_UPCAST(VNICState, vns_nc, ncp);
vsp->vns_hdl = vnd_open(NULL, ifname, &vnderr, &syserr);
if (vsp->vns_hdl == NULL) {
const char *err = vnderr != VND_E_SYS ?
vnd_strerror(vnderr) : vnd_strsyserror(syserr);
error_report("vnic: failed to open interface %s - %s\n",
ifname, err);
return (-1);
}
vib.vpb_size = 1024 * 1024 * 4; /* 4 MB */
if (vnd_prop_set(vsp->vns_hdl, VND_PROP_RXBUF, &vib,
sizeof (vib)) != 0) {
const char *err = vnderr != VND_E_SYS ?
vnd_strerror(vnderr) : vnd_strsyserror(syserr);
error_report("failed to change rx buf size: %s\n", err);
return (-1);
}
vib.vpb_size = 1024 * 1024 * 4; /* 4 MB */
if (vnd_prop_set(vsp->vns_hdl, VND_PROP_TXBUF, &vib,
sizeof (vib)) != 0) {
const char *err = vnderr != VND_E_SYS ?
vnd_strerror(vnderr) : vnd_strsyserror(syserr);
error_report("failed to change tx buf size: %s\n", err);
return (-1);
}
fd = vnd_pollfd(vsp->vns_hdl);
if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
error_report("vnic: failed to set fd on interface %s to "
"non-blocking: %s\n", ifname, strerror(errno));
return (-1);
}
vsp->vns_fd = fd;
snprintf(vsp->vns_nc.info_str, sizeof (vsp->vns_nc.info_str), "ifname=%s",
qemu_opt_get(opts, "ifname"));
if (vnic_dhcp_init(&vsp->vns_ds, opts) == 0)
return (-1);
if (vnic_frameio_init(vsp) != 0) {
error_report("vnic: failed initialize frameio: %s\n",
strerror(errno));
return (-1);
}
/* We have to manually intialize the polling for read */
vnic_read_poll(vsp, 1);
return (0);
}
