char: move socket chardev to 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-socket.c b/chardev/char-socket.c
new file mode 100644
index 0000000..4068dc5
--- /dev/null
+++ b/chardev/char-socket.c
@@ -0,0 +1,1017 @@
+/*
+ * 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 "io/channel-tls.h"
+#include "qemu/error-report.h"
+#include "qapi/error.h"
+#include "qapi/clone-visitor.h"
+
+#include "char-io.h"
+
+/***********************************************************/
+/* TCP Net console */
+
+#define TCP_MAX_FDS 16
+
+typedef struct {
+ Chardev parent;
+ QIOChannel *ioc; /* Client I/O channel */
+ QIOChannelSocket *sioc; /* Client master channel */
+ QIOChannelSocket *listen_ioc;
+ guint listen_tag;
+ QCryptoTLSCreds *tls_creds;
+ int connected;
+ int max_size;
+ int do_telnetopt;
+ int do_nodelay;
+ int is_unix;
+ int *read_msgfds;
+ size_t read_msgfds_num;
+ int *write_msgfds;
+ size_t write_msgfds_num;
+
+ SocketAddress *addr;
+ bool is_listen;
+ bool is_telnet;
+
+ guint reconnect_timer;
+ int64_t reconnect_time;
+ bool connect_err_reported;
+} SocketChardev;
+
+#define SOCKET_CHARDEV(obj) \
+ OBJECT_CHECK(SocketChardev, (obj), TYPE_CHARDEV_SOCKET)
+
+static gboolean socket_reconnect_timeout(gpointer opaque);
+
+static void qemu_chr_socket_restart_timer(Chardev *chr)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ char *name;
+
+ assert(s->connected == 0);
+ s->reconnect_timer = g_timeout_add_seconds(s->reconnect_time,
+ socket_reconnect_timeout, chr);
+ name = g_strdup_printf("chardev-socket-reconnect-%s", chr->label);
+ g_source_set_name_by_id(s->reconnect_timer, name);
+ g_free(name);
+}
+
+static void check_report_connect_error(Chardev *chr,
+ Error *err)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+
+ if (!s->connect_err_reported) {
+ error_report("Unable to connect character device %s: %s",
+ chr->label, error_get_pretty(err));
+ s->connect_err_reported = true;
+ }
+ qemu_chr_socket_restart_timer(chr);
+}
+
+static gboolean tcp_chr_accept(QIOChannel *chan,
+ GIOCondition cond,
+ void *opaque);
+
+/* Called with chr_write_lock held. */
+static int tcp_chr_write(Chardev *chr, const uint8_t *buf, int len)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+
+ if (s->connected) {
+ int ret = io_channel_send_full(s->ioc, buf, len,
+ s->write_msgfds,
+ s->write_msgfds_num);
+
+ /* free the written msgfds, no matter what */
+ if (s->write_msgfds_num) {
+ g_free(s->write_msgfds);
+ s->write_msgfds = 0;
+ s->write_msgfds_num = 0;
+ }
+
+ return ret;
+ } else {
+ /* XXX: indicate an error ? */
+ return len;
+ }
+}
+
+static int tcp_chr_read_poll(void *opaque)
+{
+ Chardev *chr = CHARDEV(opaque);
+ SocketChardev *s = SOCKET_CHARDEV(opaque);
+ if (!s->connected) {
+ return 0;
+ }
+ s->max_size = qemu_chr_be_can_write(chr);
+ return s->max_size;
+}
+
+#define IAC 255
+#define IAC_BREAK 243
+static void tcp_chr_process_IAC_bytes(Chardev *chr,
+ SocketChardev *s,
+ uint8_t *buf, int *size)
+{
+ /* Handle any telnet client's basic IAC options to satisfy char by
+ * char mode with no echo. All IAC options will be removed from
+ * the buf and the do_telnetopt variable will be used to track the
+ * state of the width of the IAC information.
+ *
+ * IAC commands come in sets of 3 bytes with the exception of the
+ * "IAC BREAK" command and the double IAC.
+ */
+
+ int i;
+ int j = 0;
+
+ for (i = 0; i < *size; i++) {
+ if (s->do_telnetopt > 1) {
+ if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
+ /* Double IAC means send an IAC */
+ if (j != i) {
+ buf[j] = buf[i];
+ }
+ j++;
+ s->do_telnetopt = 1;
+ } else {
+ if ((unsigned char)buf[i] == IAC_BREAK
+ && s->do_telnetopt == 2) {
+ /* Handle IAC break commands by sending a serial break */
+ qemu_chr_be_event(chr, CHR_EVENT_BREAK);
+ s->do_telnetopt++;
+ }
+ s->do_telnetopt++;
+ }
+ if (s->do_telnetopt >= 4) {
+ s->do_telnetopt = 1;
+ }
+ } else {
+ if ((unsigned char)buf[i] == IAC) {
+ s->do_telnetopt = 2;
+ } else {
+ if (j != i) {
+ buf[j] = buf[i];
+ }
+ j++;
+ }
+ }
+ }
+ *size = j;
+}
+
+static int tcp_get_msgfds(Chardev *chr, int *fds, int num)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+
+ int to_copy = (s->read_msgfds_num < num) ? s->read_msgfds_num : num;
+
+ assert(num <= TCP_MAX_FDS);
+
+ if (to_copy) {
+ int i;
+
+ memcpy(fds, s->read_msgfds, to_copy * sizeof(int));
+
+ /* Close unused fds */
+ for (i = to_copy; i < s->read_msgfds_num; i++) {
+ close(s->read_msgfds[i]);
+ }
+
+ g_free(s->read_msgfds);
+ s->read_msgfds = 0;
+ s->read_msgfds_num = 0;
+ }
+
+ return to_copy;
+}
+
+static int tcp_set_msgfds(Chardev *chr, int *fds, int num)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+
+ /* clear old pending fd array */
+ g_free(s->write_msgfds);
+ s->write_msgfds = NULL;
+ s->write_msgfds_num = 0;
+
+ if (!s->connected ||
+ !qio_channel_has_feature(s->ioc,
+ QIO_CHANNEL_FEATURE_FD_PASS)) {
+ return -1;
+ }
+
+ if (num) {
+ s->write_msgfds = g_new(int, num);
+ memcpy(s->write_msgfds, fds, num * sizeof(int));
+ }
+
+ s->write_msgfds_num = num;
+
+ return 0;
+}
+
+static ssize_t tcp_chr_recv(Chardev *chr, char *buf, size_t len)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ struct iovec iov = { .iov_base = buf, .iov_len = len };
+ int ret;
+ size_t i;
+ int *msgfds = NULL;
+ size_t msgfds_num = 0;
+
+ if (qio_channel_has_feature(s->ioc, QIO_CHANNEL_FEATURE_FD_PASS)) {
+ ret = qio_channel_readv_full(s->ioc, &iov, 1,
+ &msgfds, &msgfds_num,
+ NULL);
+ } else {
+ ret = qio_channel_readv_full(s->ioc, &iov, 1,
+ NULL, NULL,
+ NULL);
+ }
+
+ if (ret == QIO_CHANNEL_ERR_BLOCK) {
+ errno = EAGAIN;
+ ret = -1;
+ } else if (ret == -1) {
+ errno = EIO;
+ }
+
+ if (msgfds_num) {
+ /* close and clean read_msgfds */
+ for (i = 0; i < s->read_msgfds_num; i++) {
+ close(s->read_msgfds[i]);
+ }
+
+ if (s->read_msgfds_num) {
+ g_free(s->read_msgfds);
+ }
+
+ s->read_msgfds = msgfds;
+ s->read_msgfds_num = msgfds_num;
+ }
+
+ for (i = 0; i < s->read_msgfds_num; i++) {
+ int fd = s->read_msgfds[i];
+ if (fd < 0) {
+ continue;
+ }
+
+ /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
+ qemu_set_block(fd);
+
+#ifndef MSG_CMSG_CLOEXEC
+ qemu_set_cloexec(fd);
+#endif
+ }
+
+ return ret;
+}
+
+static GSource *tcp_chr_add_watch(Chardev *chr, GIOCondition cond)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ return qio_channel_create_watch(s->ioc, cond);
+}
+
+static void tcp_chr_free_connection(Chardev *chr)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ int i;
+
+ if (!s->connected) {
+ return;
+ }
+
+ if (s->read_msgfds_num) {
+ for (i = 0; i < s->read_msgfds_num; i++) {
+ close(s->read_msgfds[i]);
+ }
+ g_free(s->read_msgfds);
+ s->read_msgfds = NULL;
+ s->read_msgfds_num = 0;
+ }
+
+ tcp_set_msgfds(chr, NULL, 0);
+ remove_fd_in_watch(chr);
+ object_unref(OBJECT(s->sioc));
+ s->sioc = NULL;
+ object_unref(OBJECT(s->ioc));
+ s->ioc = NULL;
+ g_free(chr->filename);
+ chr->filename = NULL;
+ s->connected = 0;
+}
+
+static char *SocketAddress_to_str(const char *prefix, SocketAddress *addr,
+ bool is_listen, bool is_telnet)
+{
+ switch (addr->type) {
+ case SOCKET_ADDRESS_KIND_INET:
+ return g_strdup_printf("%s%s:%s:%s%s", prefix,
+ is_telnet ? "telnet" : "tcp",
+ addr->u.inet.data->host,
+ addr->u.inet.data->port,
+ is_listen ? ",server" : "");
+ break;
+ case SOCKET_ADDRESS_KIND_UNIX:
+ return g_strdup_printf("%sunix:%s%s", prefix,
+ addr->u.q_unix.data->path,
+ is_listen ? ",server" : "");
+ break;
+ case SOCKET_ADDRESS_KIND_FD:
+ return g_strdup_printf("%sfd:%s%s", prefix, addr->u.fd.data->str,
+ is_listen ? ",server" : "");
+ break;
+ default:
+ abort();
+ }
+}
+
+static void tcp_chr_disconnect(Chardev *chr)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+
+ if (!s->connected) {
+ return;
+ }
+
+ tcp_chr_free_connection(chr);
+
+ if (s->listen_ioc) {
+ s->listen_tag = qio_channel_add_watch(
+ QIO_CHANNEL(s->listen_ioc), G_IO_IN, tcp_chr_accept, chr, NULL);
+ }
+ chr->filename = SocketAddress_to_str("disconnected:", s->addr,
+ s->is_listen, s->is_telnet);
+ qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
+ if (s->reconnect_time) {
+ qemu_chr_socket_restart_timer(chr);
+ }
+}
+
+static gboolean tcp_chr_read(QIOChannel *chan, GIOCondition cond, void *opaque)
+{
+ Chardev *chr = CHARDEV(opaque);
+ SocketChardev *s = SOCKET_CHARDEV(opaque);
+ uint8_t buf[CHR_READ_BUF_LEN];
+ int len, size;
+
+ if (!s->connected || s->max_size <= 0) {
+ return TRUE;
+ }
+ len = sizeof(buf);
+ if (len > s->max_size) {
+ len = s->max_size;
+ }
+ size = tcp_chr_recv(chr, (void *)buf, len);
+ if (size == 0 || size == -1) {
+ /* connection closed */
+ tcp_chr_disconnect(chr);
+ } else if (size > 0) {
+ if (s->do_telnetopt) {
+ tcp_chr_process_IAC_bytes(chr, s, buf, &size);
+ }
+ if (size > 0) {
+ qemu_chr_be_write(chr, buf, size);
+ }
+ }
+
+ return TRUE;
+}
+
+static int tcp_chr_sync_read(Chardev *chr, const uint8_t *buf, int len)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ int size;
+
+ if (!s->connected) {
+ return 0;
+ }
+
+ size = tcp_chr_recv(chr, (void *) buf, len);
+ if (size == 0) {
+ /* connection closed */
+ tcp_chr_disconnect(chr);
+ }
+
+ return size;
+}
+
+static char *sockaddr_to_str(struct sockaddr_storage *ss, socklen_t ss_len,
+ struct sockaddr_storage *ps, socklen_t ps_len,
+ bool is_listen, bool is_telnet)
+{
+ char shost[NI_MAXHOST], sserv[NI_MAXSERV];
+ char phost[NI_MAXHOST], pserv[NI_MAXSERV];
+ const char *left = "", *right = "";
+
+ switch (ss->ss_family) {
+#ifndef _WIN32
+ case AF_UNIX:
+ return g_strdup_printf("unix:%s%s",
+ ((struct sockaddr_un *)(ss))->sun_path,
+ is_listen ? ",server" : "");
+#endif
+ case AF_INET6:
+ left = "[";
+ right = "]";
+ /* fall through */
+ case AF_INET:
+ getnameinfo((struct sockaddr *) ss, ss_len, shost, sizeof(shost),
+ sserv, sizeof(sserv), NI_NUMERICHOST | NI_NUMERICSERV);
+ getnameinfo((struct sockaddr *) ps, ps_len, phost, sizeof(phost),
+ pserv, sizeof(pserv), NI_NUMERICHOST | NI_NUMERICSERV);
+ return g_strdup_printf("%s:%s%s%s:%s%s <-> %s%s%s:%s",
+ is_telnet ? "telnet" : "tcp",
+ left, shost, right, sserv,
+ is_listen ? ",server" : "",
+ left, phost, right, pserv);
+
+ default:
+ return g_strdup_printf("unknown");
+ }
+}
+
+static void tcp_chr_connect(void *opaque)
+{
+ Chardev *chr = CHARDEV(opaque);
+ SocketChardev *s = SOCKET_CHARDEV(opaque);
+
+ g_free(chr->filename);
+ chr->filename = sockaddr_to_str(
+ &s->sioc->localAddr, s->sioc->localAddrLen,
+ &s->sioc->remoteAddr, s->sioc->remoteAddrLen,
+ s->is_listen, s->is_telnet);
+
+ s->connected = 1;
+ if (s->ioc) {
+ chr->fd_in_tag = io_add_watch_poll(chr, s->ioc,
+ tcp_chr_read_poll,
+ tcp_chr_read,
+ chr, NULL);
+ }
+ qemu_chr_be_generic_open(chr);
+}
+
+static void tcp_chr_update_read_handler(Chardev *chr,
+ GMainContext *context)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+
+ if (!s->connected) {
+ return;
+ }
+
+ remove_fd_in_watch(chr);
+ if (s->ioc) {
+ chr->fd_in_tag = io_add_watch_poll(chr, s->ioc,
+ tcp_chr_read_poll,
+ tcp_chr_read, chr,
+ context);
+ }
+}
+
+typedef struct {
+ Chardev *chr;
+ char buf[12];
+ size_t buflen;
+} TCPChardevTelnetInit;
+
+static gboolean tcp_chr_telnet_init_io(QIOChannel *ioc,
+ GIOCondition cond G_GNUC_UNUSED,
+ gpointer user_data)
+{
+ TCPChardevTelnetInit *init = user_data;
+ ssize_t ret;
+
+ ret = qio_channel_write(ioc, init->buf, init->buflen, NULL);
+ if (ret < 0) {
+ if (ret == QIO_CHANNEL_ERR_BLOCK) {
+ ret = 0;
+ } else {
+ tcp_chr_disconnect(init->chr);
+ return FALSE;
+ }
+ }
+ init->buflen -= ret;
+
+ if (init->buflen == 0) {
+ tcp_chr_connect(init->chr);
+ return FALSE;
+ }
+
+ memmove(init->buf, init->buf + ret, init->buflen);
+
+ return TRUE;
+}
+
+static void tcp_chr_telnet_init(Chardev *chr)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ TCPChardevTelnetInit *init = g_new0(TCPChardevTelnetInit, 1);
+ size_t n = 0;
+
+ init->chr = chr;
+ init->buflen = 12;
+
+#define IACSET(x, a, b, c) \
+ do { \
+ x[n++] = a; \
+ x[n++] = b; \
+ x[n++] = c; \
+ } while (0)
+
+ /* Prep the telnet negotion to put telnet in binary,
+ * no echo, single char mode */
+ IACSET(init->buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
+ IACSET(init->buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
+ IACSET(init->buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
+ IACSET(init->buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
+
+#undef IACSET
+
+ qio_channel_add_watch(
+ s->ioc, G_IO_OUT,
+ tcp_chr_telnet_init_io,
+ init, NULL);
+}
+
+
+static void tcp_chr_tls_handshake(QIOTask *task,
+ gpointer user_data)
+{
+ Chardev *chr = user_data;
+ SocketChardev *s = user_data;
+
+ if (qio_task_propagate_error(task, NULL)) {
+ tcp_chr_disconnect(chr);
+ } else {
+ if (s->do_telnetopt) {
+ tcp_chr_telnet_init(chr);
+ } else {
+ tcp_chr_connect(chr);
+ }
+ }
+}
+
+
+static void tcp_chr_tls_init(Chardev *chr)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ QIOChannelTLS *tioc;
+ Error *err = NULL;
+ gchar *name;
+
+ if (s->is_listen) {
+ tioc = qio_channel_tls_new_server(
+ s->ioc, s->tls_creds,
+ NULL, /* XXX Use an ACL */
+ &err);
+ } else {
+ tioc = qio_channel_tls_new_client(
+ s->ioc, s->tls_creds,
+ s->addr->u.inet.data->host,
+ &err);
+ }
+ if (tioc == NULL) {
+ error_free(err);
+ tcp_chr_disconnect(chr);
+ return;
+ }
+ name = g_strdup_printf("chardev-tls-%s-%s",
+ s->is_listen ? "server" : "client",
+ chr->label);
+ qio_channel_set_name(QIO_CHANNEL(tioc), name);
+ g_free(name);
+ object_unref(OBJECT(s->ioc));
+ s->ioc = QIO_CHANNEL(tioc);
+
+ qio_channel_tls_handshake(tioc,
+ tcp_chr_tls_handshake,
+ chr,
+ NULL);
+}
+
+
+static void tcp_chr_set_client_ioc_name(Chardev *chr,
+ QIOChannelSocket *sioc)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ char *name;
+ name = g_strdup_printf("chardev-tcp-%s-%s",
+ s->is_listen ? "server" : "client",
+ chr->label);
+ qio_channel_set_name(QIO_CHANNEL(sioc), name);
+ g_free(name);
+
+}
+
+static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+
+ if (s->ioc != NULL) {
+ return -1;
+ }
+
+ s->ioc = QIO_CHANNEL(sioc);
+ object_ref(OBJECT(sioc));
+ s->sioc = sioc;
+ object_ref(OBJECT(sioc));
+
+ qio_channel_set_blocking(s->ioc, false, NULL);
+
+ if (s->do_nodelay) {
+ qio_channel_set_delay(s->ioc, false);
+ }
+ if (s->listen_tag) {
+ g_source_remove(s->listen_tag);
+ s->listen_tag = 0;
+ }
+
+ if (s->tls_creds) {
+ tcp_chr_tls_init(chr);
+ } else {
+ if (s->do_telnetopt) {
+ tcp_chr_telnet_init(chr);
+ } else {
+ tcp_chr_connect(chr);
+ }
+ }
+
+ return 0;
+}
+
+
+static int tcp_chr_add_client(Chardev *chr, int fd)
+{
+ int ret;
+ QIOChannelSocket *sioc;
+
+ sioc = qio_channel_socket_new_fd(fd, NULL);
+ if (!sioc) {
+ return -1;
+ }
+ tcp_chr_set_client_ioc_name(chr, sioc);
+ ret = tcp_chr_new_client(chr, sioc);
+ object_unref(OBJECT(sioc));
+ return ret;
+}
+
+static gboolean tcp_chr_accept(QIOChannel *channel,
+ GIOCondition cond,
+ void *opaque)
+{
+ Chardev *chr = CHARDEV(opaque);
+ QIOChannelSocket *sioc;
+
+ sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(channel),
+ NULL);
+ if (!sioc) {
+ return TRUE;
+ }
+
+ tcp_chr_new_client(chr, sioc);
+
+ object_unref(OBJECT(sioc));
+
+ return TRUE;
+}
+
+static int tcp_chr_wait_connected(Chardev *chr, Error **errp)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ QIOChannelSocket *sioc;
+
+ /* It can't wait on s->connected, since it is set asynchronously
+ * in TLS and telnet cases, only wait for an accepted socket */
+ while (!s->ioc) {
+ if (s->is_listen) {
+ error_report("QEMU waiting for connection on: %s",
+ chr->filename);
+ qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), true, NULL);
+ tcp_chr_accept(QIO_CHANNEL(s->listen_ioc), G_IO_IN, chr);
+ qio_channel_set_blocking(QIO_CHANNEL(s->listen_ioc), false, NULL);
+ } else {
+ sioc = qio_channel_socket_new();
+ tcp_chr_set_client_ioc_name(chr, sioc);
+ if (qio_channel_socket_connect_sync(sioc, s->addr, errp) < 0) {
+ object_unref(OBJECT(sioc));
+ return -1;
+ }
+ tcp_chr_new_client(chr, sioc);
+ object_unref(OBJECT(sioc));
+ }
+ }
+
+ return 0;
+}
+
+static void char_socket_finalize(Object *obj)
+{
+ Chardev *chr = CHARDEV(obj);
+ SocketChardev *s = SOCKET_CHARDEV(obj);
+
+ tcp_chr_free_connection(chr);
+
+ if (s->reconnect_timer) {
+ g_source_remove(s->reconnect_timer);
+ s->reconnect_timer = 0;
+ }
+ qapi_free_SocketAddress(s->addr);
+ if (s->listen_tag) {
+ g_source_remove(s->listen_tag);
+ s->listen_tag = 0;
+ }
+ if (s->listen_ioc) {
+ object_unref(OBJECT(s->listen_ioc));
+ }
+ if (s->tls_creds) {
+ object_unref(OBJECT(s->tls_creds));
+ }
+
+ qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
+}
+
+static void qemu_chr_socket_connected(QIOTask *task, void *opaque)
+{
+ QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
+ Chardev *chr = CHARDEV(opaque);
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ Error *err = NULL;
+
+ if (qio_task_propagate_error(task, &err)) {
+ check_report_connect_error(chr, err);
+ error_free(err);
+ goto cleanup;
+ }
+
+ s->connect_err_reported = false;
+ tcp_chr_new_client(chr, sioc);
+
+cleanup:
+ object_unref(OBJECT(sioc));
+}
+
+static gboolean socket_reconnect_timeout(gpointer opaque)
+{
+ Chardev *chr = CHARDEV(opaque);
+ SocketChardev *s = SOCKET_CHARDEV(opaque);
+ QIOChannelSocket *sioc;
+
+ s->reconnect_timer = 0;
+
+ if (chr->be_open) {
+ return false;
+ }
+
+ sioc = qio_channel_socket_new();
+ tcp_chr_set_client_ioc_name(chr, sioc);
+ qio_channel_socket_connect_async(sioc, s->addr,
+ qemu_chr_socket_connected,
+ chr, NULL);
+
+ return false;
+}
+
+static void qmp_chardev_open_socket(Chardev *chr,
+ ChardevBackend *backend,
+ bool *be_opened,
+ Error **errp)
+{
+ SocketChardev *s = SOCKET_CHARDEV(chr);
+ ChardevSocket *sock = backend->u.socket.data;
+ SocketAddress *addr = sock->addr;
+ bool do_nodelay = sock->has_nodelay ? sock->nodelay : false;
+ bool is_listen = sock->has_server ? sock->server : true;
+ bool is_telnet = sock->has_telnet ? sock->telnet : false;
+ bool is_waitconnect = sock->has_wait ? sock->wait : false;
+ int64_t reconnect = sock->has_reconnect ? sock->reconnect : 0;
+ QIOChannelSocket *sioc = NULL;
+
+ s->is_unix = addr->type == SOCKET_ADDRESS_KIND_UNIX;
+ s->is_listen = is_listen;
+ s->is_telnet = is_telnet;
+ s->do_nodelay = do_nodelay;
+ if (sock->tls_creds) {
+ Object *creds;
+ creds = object_resolve_path_component(
+ object_get_objects_root(), sock->tls_creds);
+ if (!creds) {
+ error_setg(errp, "No TLS credentials with id '%s'",
+ sock->tls_creds);
+ goto error;
+ }
+ s->tls_creds = (QCryptoTLSCreds *)
+ object_dynamic_cast(creds,
+ TYPE_QCRYPTO_TLS_CREDS);
+ if (!s->tls_creds) {
+ error_setg(errp, "Object with id '%s' is not TLS credentials",
+ sock->tls_creds);
+ goto error;
+ }
+ object_ref(OBJECT(s->tls_creds));
+ if (is_listen) {
+ if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) {
+ error_setg(errp, "%s",
+ "Expected TLS credentials for server endpoint");
+ goto error;
+ }
+ } else {
+ if (s->tls_creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
+ error_setg(errp, "%s",
+ "Expected TLS credentials for client endpoint");
+ goto error;
+ }
+ }
+ }
+
+ s->addr = QAPI_CLONE(SocketAddress, sock->addr);
+
+ qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_RECONNECTABLE);
+ if (s->is_unix) {
+ qemu_chr_set_feature(chr, QEMU_CHAR_FEATURE_FD_PASS);
+ }
+
+ /* be isn't opened until we get a connection */
+ *be_opened = false;
+
+ chr->filename = SocketAddress_to_str("disconnected:",
+ addr, is_listen, is_telnet);
+
+ if (is_listen) {
+ if (is_telnet) {
+ s->do_telnetopt = 1;
+ }
+ } else if (reconnect > 0) {
+ s->reconnect_time = reconnect;
+ }
+
+ if (s->reconnect_time) {
+ sioc = qio_channel_socket_new();
+ tcp_chr_set_client_ioc_name(chr, sioc);
+ qio_channel_socket_connect_async(sioc, s->addr,
+ qemu_chr_socket_connected,
+ chr, NULL);
+ } else {
+ if (s->is_listen) {
+ char *name;
+ sioc = qio_channel_socket_new();
+
+ name = g_strdup_printf("chardev-tcp-listener-%s", chr->label);
+ qio_channel_set_name(QIO_CHANNEL(sioc), name);
+ g_free(name);
+
+ if (qio_channel_socket_listen_sync(sioc, s->addr, errp) < 0) {
+ goto error;
+ }
+ s->listen_ioc = sioc;
+ if (is_waitconnect &&
+ qemu_chr_wait_connected(chr, errp) < 0) {
+ return;
+ }
+ if (!s->ioc) {
+ s->listen_tag = qio_channel_add_watch(
+ QIO_CHANNEL(s->listen_ioc), G_IO_IN,
+ tcp_chr_accept, chr, NULL);
+ }
+ } else if (qemu_chr_wait_connected(chr, errp) < 0) {
+ goto error;
+ }
+ }
+
+ return;
+
+error:
+ if (sioc) {
+ object_unref(OBJECT(sioc));
+ }
+}
+
+static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
+ Error **errp)
+{
+ bool is_listen = qemu_opt_get_bool(opts, "server", false);
+ bool is_waitconnect = is_listen && qemu_opt_get_bool(opts, "wait", true);
+ bool is_telnet = qemu_opt_get_bool(opts, "telnet", false);
+ bool do_nodelay = !qemu_opt_get_bool(opts, "delay", true);
+ int64_t reconnect = qemu_opt_get_number(opts, "reconnect", 0);
+ const char *path = qemu_opt_get(opts, "path");
+ const char *host = qemu_opt_get(opts, "host");
+ const char *port = qemu_opt_get(opts, "port");
+ const char *tls_creds = qemu_opt_get(opts, "tls-creds");
+ SocketAddress *addr;
+ ChardevSocket *sock;
+
+ backend->type = CHARDEV_BACKEND_KIND_SOCKET;
+ if (!path) {
+ if (!host) {
+ error_setg(errp, "chardev: socket: no host given");
+ return;
+ }
+ if (!port) {
+ error_setg(errp, "chardev: socket: no port given");
+ return;
+ }
+ } else {
+ if (tls_creds) {
+ error_setg(errp, "TLS can only be used over TCP socket");
+ return;
+ }
+ }
+
+ sock = backend->u.socket.data = g_new0(ChardevSocket, 1);
+ qemu_chr_parse_common(opts, qapi_ChardevSocket_base(sock));
+
+ sock->has_nodelay = true;
+ sock->nodelay = do_nodelay;
+ sock->has_server = true;
+ sock->server = is_listen;
+ sock->has_telnet = true;
+ sock->telnet = is_telnet;
+ sock->has_wait = true;
+ sock->wait = is_waitconnect;
+ sock->has_reconnect = true;
+ sock->reconnect = reconnect;
+ sock->tls_creds = g_strdup(tls_creds);
+
+ addr = g_new0(SocketAddress, 1);
+ if (path) {
+ UnixSocketAddress *q_unix;
+ addr->type = SOCKET_ADDRESS_KIND_UNIX;
+ q_unix = addr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
+ q_unix->path = g_strdup(path);
+ } else {
+ 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_to = qemu_opt_get(opts, "to"),
+ .to = qemu_opt_get_number(opts, "to", 0),
+ .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),
+ };
+ }
+ sock->addr = addr;
+}
+
+static void char_socket_class_init(ObjectClass *oc, void *data)
+{
+ ChardevClass *cc = CHARDEV_CLASS(oc);
+
+ cc->parse = qemu_chr_parse_socket;
+ cc->open = qmp_chardev_open_socket;
+ cc->chr_wait_connected = tcp_chr_wait_connected;
+ cc->chr_write = tcp_chr_write;
+ cc->chr_sync_read = tcp_chr_sync_read;
+ cc->chr_disconnect = tcp_chr_disconnect;
+ cc->get_msgfds = tcp_get_msgfds;
+ cc->set_msgfds = tcp_set_msgfds;
+ cc->chr_add_client = tcp_chr_add_client;
+ cc->chr_add_watch = tcp_chr_add_watch;
+ cc->chr_update_read_handler = tcp_chr_update_read_handler;
+}
+
+static const TypeInfo char_socket_type_info = {
+ .name = TYPE_CHARDEV_SOCKET,
+ .parent = TYPE_CHARDEV,
+ .instance_size = sizeof(SocketChardev),
+ .instance_finalize = char_socket_finalize,
+ .class_init = char_socket_class_init,
+};
+
+static void register_types(void)
+{
+ type_register_static(&char_socket_type_info);
+}
+
+type_init(register_types);
