wutsocket: implement missing functions

include/nsysnet/_netdb.h

@@ -0,0 +1,57 @@
+#pragma once
+#include <wut.h>
+#include <netdb.h>
+
+/**
+ * \defgroup nsysnet_netdb Netdb
+ * \ingroup nsysnet
+ * @{
+ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct hostent *
+RPLWRAP(gethostbyaddr)(const void *addr,
+                       size_t len, 
+                       int type);
+
+struct hostent *
+RPLWRAP(gethostbyname)(const char *name);
+
+int
+RPLWRAP(getaddrinfo)(const char *node,
+                     const char *service,
+                     const struct addrinfo *hints,
+                     struct addrinfo **res);
+
+void
+RPLWRAP(freeaddrinfo)(struct addrinfo *res);
+
+int
+RPLWRAP(getnameinfo)(const struct sockaddr *addr,
+                     socklen_t addrlen,
+                     char *host,
+                     socklen_t hostlen,
+                     char *serv,
+                     socklen_t servlen,
+                     int flags);
+
+void 
+RPLWRAP(clear_resolver_cache)(void);
+
+int
+RPLWRAP(set_resolver_allocator)(void* (*alloc)(uint32_t),
+                                void (*free)(void*));
+
+int *
+RPLWRAP(get_h_errno)(void);
+
+const char *
+RPLWRAP(gai_strerror)(int ecode);
+
+#ifdef __cplusplus
+}
+#endif
+
+/** @} */