1 files changed, 49 insertions, 0 deletions
diff --git a/socket_udp6.c b/socket_udp6.c
new file mode 100644
index 0000000..b58b55c
--- /dev/null
+++ b/socket_udp6.c
@@ -0,0 +1,49 @@
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <errno.h>
+#include <unistd.h>
+#include "ndelay.h"
+#include "socket.h"
+#include "haveip6.h"
+#include "error.h"
+
+#ifndef EAFNOSUPPORT
+#define EAFNOSUPPORT EINVAL
+#endif
+#ifndef EPFNOSUPPORT
+#define EPFNOSUPPORT EAFNOSUPPORT
+#endif
+#ifndef EPROTONOSUPPORT
+#define EPROTONOSUPPORT EAFNOSUPPORT
+#endif
+
+int socket_udp6(void)
+{
+#ifdef LIBC_HAS_IP6
+  int s;
+
+  if (noipv6) goto compat;
+  s = socket(PF_INET6,SOCK_DGRAM,0);
+  if (s == -1) {
+    if (errno == EINVAL || errno == EAFNOSUPPORT || errno == EPFNOSUPPORT || errno == EPROTONOSUPPORT) {
+compat:
+      s=socket(AF_INET,SOCK_DGRAM,0);
+      noipv6=1;
+      if (s==-1) return -1;
+    } else
+    return -1;
+  }
+  if (ndelay_on(s) == -1) { close(s); return -1; }
+#ifdef IPV6_V6ONLY
+  {
+    int zero=0;
+    setsockopt(s,IPPROTO_IPV6,IPV6_V6ONLY,(void*)&zero,sizeof(zero));
+  }
+#endif
+  return s;
+#else
+  return socket_udp();
+#endif
+}