wutsocket: implement gethostid and gethostname

libraries/wutsocket/hostid.c

@@ -0,0 +1,21 @@
+#include "wut_socket.h"
+
+#include <nn/ac.h>
+
+long
+gethostid(void)
+{
+   long ip = -1;
+   ACGetAssignedAddress((uint32_t*) &ip);
+   return ip;
+}
+
+int
+gethostname(char *name,
+            size_t len)
+{
+   struct in_addr in;
+   in.s_addr = gethostid();
+   const char *hostname = inet_ntop(AF_INET, &in, name, len);
+   return hostname ? 0 : -1;
+}