1 files changed, 35 insertions, 0 deletions
diff --git a/src/sysdeps/tryipv6.c b/src/sysdeps/tryipv6.c
new file mode 100644
index 0000000..0c7f306
--- /dev/null
+++ b/src/sysdeps/tryipv6.c
@@ -0,0 +1,35 @@
+/* ISC license. */
+
+#undef _POSIX_C_SOURCE
+#undef _XOPEN_SOURCE
+
+#define _XPG4_2
+#define _XPG6
+
+#include <sys/types.h>
+
+#if defined(__FreeBSD__)
+# include <sys/param.h>
+#endif
+
+#include <errno.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+int main (void)
+{
+  int s ;
+  register int r ;
+  struct in6_addr foo ;
+  struct sockaddr_in6 bar ;
+  memset(&foo, 0, sizeof(struct sockaddr_in6)) ;
+  bar.sin6_addr = foo ;
+  bar.sin6_port = 1026 ;
+  s = socket(AF_INET6, SOCK_STREAM, 0) ;
+  if (s < 0) return 111 ;
+  do r = connect(s, (struct sockaddr *)&bar, sizeof bar) ;
+  while ((r == -1) && (errno == EINTR)) ;
+  if ((r == -1) && (errno == EALREADY)) errno = EINPROGRESS ;
+  return 0 ;
+}