[Qemu-devel] [PATCH v6 1/4] net/socket: Don't treat odd socket type as SOCK_STREAM

[Mao Zhongyi <maozy.fnst@cn.fujitsu.com>]

In net_socket_fd_init(), the 'default' case is odd: it warns,
then continues as if the socket type was SOCK_STREAM. The
comment explains "this could be a eg. a pty", but that makes
no sense. If @fd really was a pty, getsockopt() would fail
with ENOTSOCK. If @fd was a socket, but neither SOCK_DGRAM nor
SOCK_STREAM. It should not be treated as if it was SOCK_STREAM.

Turn this case into an Error. If there is a genuine reason to
support something like SOCK_RAW, it should be explicitly
handled.

Cc: jasowang@redhat.com
Cc: armbru@redhat.com
Cc: berrange@redhat.com
Cc: armbru@redhat.com
Suggested-by: Markus Armbruster <armbru@redhat.com>
Suggested-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
---
 net/socket.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/socket.c b/net/socket.c
index dcae1ae..53765bd 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -449,9 +449,9 @@ static NetSocketState *net_socket_fd_init(NetClientState *peer,
     case SOCK_STREAM:
         return net_socket_fd_init_stream(peer, model, name, fd, is_connected);
     default:
-        /* who knows ... this could be a eg. a pty, do warn and continue as stream */
-        fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
-        return net_socket_fd_init_stream(peer, model, name, fd, is_connected);
+        error_report("qemu: error: socket type=%d for fd=%d is not"
+                " SOCK_DGRAM or SOCK_STREAM", so_type, fd);
+        closesocket(fd);
     }
     return NULL;
 }
-- 
2.9.4