char: move udp chardev in its own file
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Eric Blake <eblake@redhat.com>
diff --git a/chardev/char-udp.c b/chardev/char-udp.c
new file mode 100644
index 0000000..2c6c7dd
--- /dev/null
+++ b/chardev/char-udp.c
@@ -0,0 +1,233 @@
+/*
+ * 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 "qemu/osdep.h"
+#include "sysemu/char.h"
+#include "io/channel-socket.h"
+#include "qapi/error.h"
+
+#include "char-io.h"
+
+/***********************************************************/
+/* UDP Net console */
+
+typedef struct {
+ Chardev parent;
+ QIOChannel *ioc;
+ uint8_t buf[CHR_READ_BUF_LEN];
+ int bufcnt;
+ int bufptr;
+ int max_size;
+} UdpChardev;
+
+#define UDP_CHARDEV(obj) OBJECT_CHECK(UdpChardev, (obj), TYPE_CHARDEV_UDP)
+
+/* Called with chr_write_lock held. */
+static int udp_chr_write(Chardev *chr, const uint8_t *buf, int len)
+{
+ UdpChardev *s = UDP_CHARDEV(chr);
+
+ return qio_channel_write(
+ s->ioc, (const char *)buf, len, NULL);
+}
+
+static int udp_chr_read_poll(void *opaque)
+{
+ Chardev *chr = CHARDEV(opaque);
+ UdpChardev *s = UDP_CHARDEV(opaque);
+
+ s->max_size = qemu_chr_be_can_write(chr);
+
+ /* If there were any stray characters in the queue process them
+ * first
+ */
+ while (s->max_size > 0 && s->bufptr < s->bufcnt) {
+ qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
+ s->bufptr++;
+ s->max_size = qemu_chr_be_can_write(chr);
+ }
+ return s->max_size;
+}
+
+static gboolean udp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
+{
+ Chardev *chr = CHARDEV(opaque);
+ UdpChardev *s = UDP_CHARDEV(opaque);
+ ssize_t ret;
+
+ if (s->max_size == 0) {
+ return TRUE;
+ }
+ ret = qio_channel_read(
+ s->ioc, (char *)s->buf, sizeof(s->buf), NULL);
+ if (ret <= 0) {
+ remove_fd_in_watch(chr);
+ return FALSE;
+ }
+ s->bufcnt = ret;
+
+ s->bufptr = 0;
+ while (s->max_size > 0 && s->bufptr < s->bufcnt) {
+ qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
+ s->bufptr++;
+ s->max_size = qemu_chr_be_can_write(chr);
+ }
+
+ return TRUE;
+}
+
+static void udp_chr_update_read_handler(Chardev *chr,
+ GMainContext *context)
+{
+ UdpChardev *s = UDP_CHARDEV(chr);
+
+ remove_fd_in_watch(chr);
+ if (s->ioc) {
+ chr->fd_in_tag = io_add_watch_poll(chr, s->ioc,
+ udp_chr_read_poll,
+ udp_chr_read, chr,
+ context);
+ }
+}
+
+static void char_udp_finalize(Object *obj)
+{
+ Chardev *chr = CHARDEV(obj);
+ UdpChardev *s = UDP_CHARDEV(obj);
+
+ remove_fd_in_watch(chr);
+ if (s->ioc) {
+ object_unref(OBJECT(s->ioc));
+ }
+ qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
+}
+
+static void qemu_chr_parse_udp(QemuOpts *opts, ChardevBackend *backend,
+ Error **errp)
+{
+ const char *host = qemu_opt_get(opts, "host");
+ const char *port = qemu_opt_get(opts, "port");
+ const char *localaddr = qemu_opt_get(opts, "localaddr");
+ const char *localport = qemu_opt_get(opts, "localport");
+ bool has_local = false;
+ SocketAddress *addr;
+ ChardevUdp *udp;
+
+ backend->type = CHARDEV_BACKEND_KIND_UDP;
+ if (host == NULL || strlen(host) == 0) {
+ host = "localhost";
+ }
+ if (port == NULL || strlen(port) == 0) {
+ error_setg(errp, "chardev: udp: remote port not specified");
+ return;
+ }
+ if (localport == NULL || strlen(localport) == 0) {
+ localport = "0";
+ } else {
+ has_local = true;
+ }
+ if (localaddr == NULL || strlen(localaddr) == 0) {
+ localaddr = "";
+ } else {
+ has_local = true;
+ }
+
+ udp = backend->u.udp.data = g_new0(ChardevUdp, 1);
+ qemu_chr_parse_common(opts, qapi_ChardevUdp_base(udp));
+
+ addr = g_new0(SocketAddress, 1);
+ addr->type = SOCKET_ADDRESS_KIND_INET;
+ addr->u.inet.data = g_new(InetSocketAddress, 1);
+ *addr->u.inet.data = (InetSocketAddress) {
+ .host = g_strdup(host),
+ .port = g_strdup(port),
+ .has_ipv4 = qemu_opt_get(opts, "ipv4"),
+ .ipv4 = qemu_opt_get_bool(opts, "ipv4", 0),
+ .has_ipv6 = qemu_opt_get(opts, "ipv6"),
+ .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
+ };
+ udp->remote = addr;
+
+ if (has_local) {
+ udp->has_local = true;
+ addr = g_new0(SocketAddress, 1);
+ addr->type = SOCKET_ADDRESS_KIND_INET;
+ addr->u.inet.data = g_new(InetSocketAddress, 1);
+ *addr->u.inet.data = (InetSocketAddress) {
+ .host = g_strdup(localaddr),
+ .port = g_strdup(localport),
+ };
+ udp->local = addr;
+ }
+}
+
+static void qmp_chardev_open_udp(Chardev *chr,
+ ChardevBackend *backend,
+ bool *be_opened,
+ Error **errp)
+{
+ ChardevUdp *udp = backend->u.udp.data;
+ QIOChannelSocket *sioc = qio_channel_socket_new();
+ char *name;
+ UdpChardev *s = UDP_CHARDEV(chr);
+
+ if (qio_channel_socket_dgram_sync(sioc,
+ udp->local, udp->remote,
+ errp) < 0) {
+ object_unref(OBJECT(sioc));
+ return;
+ }
+
+ name = g_strdup_printf("chardev-udp-%s", chr->label);
+ qio_channel_set_name(QIO_CHANNEL(sioc), name);
+ g_free(name);
+
+ s->ioc = QIO_CHANNEL(sioc);
+ /* be isn't opened until we get a connection */
+ *be_opened = false;
+}
+
+static void char_udp_class_init(ObjectClass *oc, void *data)
+{
+ ChardevClass *cc = CHARDEV_CLASS(oc);
+
+ cc->parse = qemu_chr_parse_udp;
+ cc->open = qmp_chardev_open_udp;
+ cc->chr_write = udp_chr_write;
+ cc->chr_update_read_handler = udp_chr_update_read_handler;
+}
+
+static const TypeInfo char_udp_type_info = {
+ .name = TYPE_CHARDEV_UDP,
+ .parent = TYPE_CHARDEV,
+ .instance_size = sizeof(UdpChardev),
+ .instance_finalize = char_udp_finalize,
+ .class_init = char_udp_class_init,
+};
+
+static void register_types(void)
+{
+ type_register_static(&char_udp_type_info);
+}
+
+type_init(register_types);
