[Qemu-devel] [PATCH v2 2/3] socket: add listen feature

[marcandre.lureau@redhat.com]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Add a flag to tell whether the channel socket is listening.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 include/io/channel.h | 1 +
 io/channel-socket.c  | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/include/io/channel.h b/include/io/channel.h
index d37acd2..e52f059 100644
--- a/include/io/channel.h
+++ b/include/io/channel.h
@@ -42,6 +42,7 @@ typedef enum QIOChannelFeature QIOChannelFeature;
 enum QIOChannelFeature {
     QIO_CHANNEL_FEATURE_FD_PASS  = (1 << 0),
     QIO_CHANNEL_FEATURE_SHUTDOWN = (1 << 1),
+    QIO_CHANNEL_FEATURE_LISTEN   = (1 << 2),
 };
 
 
diff --git a/io/channel-socket.c b/io/channel-socket.c
index ca8bc20..1cd5848 100644
--- a/io/channel-socket.c
+++ b/io/channel-socket.c
@@ -71,6 +71,9 @@ qio_channel_socket_set_fd(QIOChannelSocket *sioc,
                           int fd,
                           Error **errp)
 {
+    int val;
+    socklen_t len = sizeof(val);
+
     if (sioc->fd != -1) {
         error_setg(errp, "Socket is already open");
         return -1;
@@ -106,6 +109,10 @@ qio_channel_socket_set_fd(QIOChannelSocket *sioc,
         ioc->features |= (1 << QIO_CHANNEL_FEATURE_FD_PASS);
     }
 #endif /* WIN32 */
+    if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &val, &len) == 0 && val) {
+        QIOChannel *ioc = QIO_CHANNEL(sioc);
+        ioc->features |= (1 << QIO_CHANNEL_FEATURE_LISTEN);
+    }
 
     return 0;
 
-- 
2.7.4