slirp: Port redirection option behave differently on Linux and Windows

port redirection code uses SO_REUSEADDR socket option before binding to
host port. Behavior of SO_REUSEADDR is different on Windows and Linux.
Relaunching QEMU with same host and guest port redirection values on Linux
throws error but on Windows it does not throw any error.
Problem is discussed in http://lists.gnu.org/archive/html/qemu-devel/2013-04/msg03089.html

Signed-off-by: Taimoor Mirza <tmirza@codesourcery.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/slirp/socket.c b/slirp/socket.c
index 8e8819c..25d60e7 100644 (file)
--- a/slirp/socket.c
+++ b/slirp/socket.c
@@ -627,7 +627,9 @@ tcp_listen(Slirp *slirp, uint32_t haddr, u_int hport, uint32_t laddr,
        addr.sin_port = hport;
 
        if (((s = qemu_socket(AF_INET,SOCK_STREAM,0)) < 0) ||
+#ifndef _WIN32
            (qemu_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(int)) < 0) ||
+#endif
            (bind(s,(struct sockaddr *)&addr, sizeof(addr)) < 0) ||
            (listen(s,1) < 0)) {
                int tmperrno = errno; /* Don't clobber the real reason we failed */