ui: convert VNC server to QIONetListener

The VNC server already has the ability to listen on multiple sockets.
Converting it to use the QIONetListener APIs though, will reduce the
amount of code in the VNC server and improve the clarity of what is
left.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20180201164514.10330-1-berrange@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 55 insertions, 140 deletions

diff --git a/ui/vnc.c b/ui/vnc.c
index 33b087221f..93731accb6 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -228,12 +228,12 @@ static VncServerInfo *vnc_server_info_get(VncDisplay *vd)
     VncServerInfo *info;
     Error *err = NULL;
 
-    if (!vd->nlsock) {
+    if (!vd->listener || !vd->listener->nsioc) {
         return NULL;
     }
 
     info = g_malloc0(sizeof(*info));
-    vnc_init_basic_info_from_server_addr(vd->lsock[0],
+    vnc_init_basic_info_from_server_addr(vd->listener->sioc[0],
                                          qapi_VncServerInfo_base(info), &err);
     info->has_auth = true;
     info->auth = g_strdup(vnc_auth_name(vd));
@@ -379,7 +379,7 @@ VncInfo *qmp_query_vnc(Error **errp)
     VncDisplay *vd = vnc_display_find(NULL);
     SocketAddress *addr = NULL;
 
-    if (vd == NULL || !vd->nlsock) {
+    if (vd == NULL || !vd->listener || !vd->listener->nsioc) {
         info->enabled = false;
     } else {
         info->enabled = true;
@@ -388,11 +388,8 @@ VncInfo *qmp_query_vnc(Error **errp)
         info->has_clients = true;
         info->clients = qmp_query_client_list(vd);
 
-        if (vd->lsock == NULL) {
-            return info;
-        }
-
-        addr = qio_channel_socket_get_local_address(vd->lsock[0], errp);
+        addr = qio_channel_socket_get_local_address(vd->listener->sioc[0],
+                                                    errp);
         if (!addr) {
             goto out_error;
         }
@@ -572,13 +569,14 @@ VncInfo2List *qmp_query_vnc_servers(Error **errp)
             info->has_display = true;
             info->display = g_strdup(dev->id);
         }
-        for (i = 0; i < vd->nlsock; i++) {
+        for (i = 0; vd->listener != NULL && i < vd->listener->nsioc; i++) {
             info->server = qmp_query_server_entry(
-                vd->lsock[i], false, vd->auth, vd->subauth, info->server);
+                vd->listener->sioc[i], false, vd->auth, vd->subauth,
+                info->server);
         }
-        for (i = 0; i < vd->nlwebsock; i++) {
+        for (i = 0; vd->wslistener != NULL && i < vd->wslistener->nsioc; i++) {
             info->server = qmp_query_server_entry(
-                vd->lwebsock[i], true, vd->ws_auth,
+                vd->wslistener->sioc[i], true, vd->ws_auth,
                 vd->ws_subauth, info->server);
         }
 
@@ -3143,36 +3141,18 @@ void vnc_start_protocol(VncState *vs)
     qemu_add_mouse_mode_change_notifier(&vs->mouse_mode_notifier);
 }
 
-static gboolean vnc_listen_io(QIOChannel *ioc,
-                              GIOCondition condition,
-                              void *opaque)
+static void vnc_listen_io(QIONetListener *listener,
+                          QIOChannelSocket *cioc,
+                          void *opaque)
 {
     VncDisplay *vd = opaque;
-    QIOChannelSocket *sioc = NULL;
-    Error *err = NULL;
-    bool isWebsock = false;
-    size_t i;
-
-    for (i = 0; i < vd->nlwebsock; i++) {
-        if (ioc == QIO_CHANNEL(vd->lwebsock[i])) {
-            isWebsock = true;
-            break;
-        }
-    }
+    bool isWebsock = listener == vd->wslistener;
 
-    sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), &err);
-    if (sioc != NULL) {
-        qio_channel_set_name(QIO_CHANNEL(sioc),
-                             isWebsock ? "vnc-ws-server" : "vnc-server");
-        qio_channel_set_delay(QIO_CHANNEL(sioc), false);
-        vnc_connect(vd, sioc, false, isWebsock);
-        object_unref(OBJECT(sioc));
-    } else {
-        /* client probably closed connection before we got there */
-        error_free(err);
-    }
-
-    return TRUE;
+    qio_channel_set_name(QIO_CHANNEL(cioc),
+                         isWebsock ? "vnc-ws-server" : "vnc-server");
+    qio_channel_set_delay(QIO_CHANNEL(cioc), false);
+    vnc_connect(vd, cioc, false, isWebsock);
+    object_unref(OBJECT(cioc));
 }
 
 static const DisplayChangeListenerOps dcl_ops = {
@@ -3224,34 +3204,22 @@ void vnc_display_init(const char *id)
 
 static void vnc_display_close(VncDisplay *vd)
 {
-    size_t i;
     if (!vd) {
         return;
     }
     vd->is_unix = false;
-    for (i = 0; i < vd->nlsock; i++) {
-        if (vd->lsock_tag[i]) {
-            g_source_remove(vd->lsock_tag[i]);
-        }
-        object_unref(OBJECT(vd->lsock[i]));
+
+    if (vd->listener) {
+        qio_net_listener_disconnect(vd->listener);
+        object_unref(OBJECT(vd->listener));
     }
-    g_free(vd->lsock);
-    g_free(vd->lsock_tag);
-    vd->lsock = NULL;
-    vd->lsock_tag = NULL;
-    vd->nlsock = 0;
+    vd->listener = NULL;
 
-    for (i = 0; i < vd->nlwebsock; i++) {
-        if (vd->lwebsock_tag[i]) {
-            g_source_remove(vd->lwebsock_tag[i]);
-        }
-        object_unref(OBJECT(vd->lwebsock[i]));
+    if (vd->wslistener) {
+        qio_net_listener_disconnect(vd->wslistener);
+        object_unref(OBJECT(vd->wslistener));
     }
-    g_free(vd->lwebsock);
-    g_free(vd->lwebsock_tag);
-    vd->lwebsock = NULL;
-    vd->lwebsock_tag = NULL;
-    vd->nlwebsock = 0;
+    vd->wslistener = NULL;
 
     vd->auth = VNC_AUTH_INVALID;
     vd->subauth = VNC_AUTH_INVALID;
@@ -3303,11 +3271,11 @@ static void vnc_display_print_local_addr(VncDisplay *vd)
     SocketAddress *addr;
     Error *err = NULL;
 
-    if (!vd->nlsock) {
+    if (!vd->listener || !vd->listener->nsioc) {
         return;
     }
 
-    addr = qio_channel_socket_get_local_address(vd->lsock[0], &err);
+    addr = qio_channel_socket_get_local_address(vd->listener->sioc[0], &err);
     if (!addr) {
         return;
     }
@@ -3815,68 +3783,6 @@ static int vnc_display_connect(VncDisplay *vd,
 }
 
 
-static int vnc_display_listen_addr(VncDisplay *vd,
-                                   SocketAddress *addr,
-                                   const char *name,
-                                   QIOChannelSocket ***lsock,
-                                   guint **lsock_tag,
-                                   size_t *nlsock,
-                                   Error **errp)
-{
-    QIODNSResolver *resolver = qio_dns_resolver_get_instance();
-    SocketAddress **rawaddrs = NULL;
-    size_t nrawaddrs = 0;
-    Error *listenerr = NULL;
-    bool listening = false;
-    size_t i;
-
-    if (qio_dns_resolver_lookup_sync(resolver, addr, &nrawaddrs,
-                                     &rawaddrs, errp) < 0) {
-        return -1;
-    }
-
-    for (i = 0; i < nrawaddrs; i++) {
-        QIOChannelSocket *sioc = qio_channel_socket_new();
-
-        qio_channel_set_name(QIO_CHANNEL(sioc), name);
-        if (qio_channel_socket_listen_sync(
-                sioc, rawaddrs[i], listenerr == NULL ? &listenerr : NULL) < 0) {
-            object_unref(OBJECT(sioc));
-            continue;
-        }
-        listening = true;
-        (*nlsock)++;
-        *lsock = g_renew(QIOChannelSocket *, *lsock, *nlsock);
-        *lsock_tag = g_renew(guint, *lsock_tag, *nlsock);
-
-        (*lsock)[*nlsock - 1] = sioc;
-        (*lsock_tag)[*nlsock - 1] = 0;
-    }
-
-    for (i = 0; i < nrawaddrs; i++) {
-        qapi_free_SocketAddress(rawaddrs[i]);
-    }
-    g_free(rawaddrs);
-
-    if (listenerr) {
-        if (!listening) {
-            error_propagate(errp, listenerr);
-            return -1;
-        } else {
-            error_free(listenerr);
-        }
-    }
-
-    for (i = 0; i < *nlsock; i++) {
-        (*lsock_tag)[i] = qio_channel_add_watch(
-            QIO_CHANNEL((*lsock)[i]),
-            G_IO_IN, vnc_listen_io, vd, NULL);
-    }
-
-    return 0;
-}
-
-
 static int vnc_display_listen(VncDisplay *vd,
                               SocketAddress **saddr,
                               size_t nsaddr,
@@ -3886,25 +3792,34 @@ static int vnc_display_listen(VncDisplay *vd,
 {
     size_t i;
 
-    for (i = 0; i < nsaddr; i++) {
-        if (vnc_display_listen_addr(vd, saddr[i],
-                                    "vnc-listen",
-                                    &vd->lsock,
-                                    &vd->lsock_tag,
-                                    &vd->nlsock,
-                                    errp) < 0) {
-            return -1;
+    if (nsaddr) {
+        vd->listener = qio_net_listener_new();
+        qio_net_listener_set_name(vd->listener, "vnc-listen");
+        for (i = 0; i < nsaddr; i++) {
+            if (qio_net_listener_open_sync(vd->listener,
+                                           saddr[i],
+                                           errp) < 0)  {
+                return -1;
+            }
         }
+
+        qio_net_listener_set_client_func(vd->listener,
+                                         vnc_listen_io, vd, NULL);
     }
-    for (i = 0; i < nwsaddr; i++) {
-        if (vnc_display_listen_addr(vd, wsaddr[i],
-                                    "vnc-ws-listen",
-                                    &vd->lwebsock,
-                                    &vd->lwebsock_tag,
-                                    &vd->nlwebsock,
-                                    errp) < 0) {
-            return -1;
+
+    if (nwsaddr) {
+        vd->wslistener = qio_net_listener_new();
+        qio_net_listener_set_name(vd->wslistener, "vnc-ws-listen");
+        for (i = 0; i < nwsaddr; i++) {
+            if (qio_net_listener_open_sync(vd->wslistener,
+                                           wsaddr[i],
+                                           errp) < 0)  {
+                return -1;
+            }
         }
+
+        qio_net_listener_set_client_func(vd->wslistener,
+                                         vnc_listen_io, vd, NULL);
     }
 
     return 0;