hostfwd: Add SLIRP_HOSTFWD_V6ONLY flag

That allows to request binding on v6 addresses only.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/util.h b/src/util.h
index 8134db9..07654ec 100644
--- a/src/util.h
+++ b/src/util.h
@@ -39,6 +39,7 @@
 #ifdef _WIN32
 #include <winsock2.h>
 #include <windows.h>
+#include <ws2tcpip.h>
 #else
 #include <sys/socket.h>
 #include <netinet/tcp.h>
@@ -161,6 +162,11 @@ int slirp_inet_aton(const char *cp, struct in_addr *ia);
 int slirp_socket(int domain, int type, int protocol);
 void slirp_set_nonblock(int fd);
 
+static inline int slirp_socket_set_v6only(int fd, int v)
+{
+    return setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &v, sizeof(v));
+}
+
 static inline int slirp_socket_set_nodelay(int fd)
 {
     int v = 1;