--- libelwix/src/net.c	2016/05/18 12:38:16	1.12.4.6
+++ libelwix/src/net.c	2016/08/02 12:03:56	1.16
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: net.c,v 1.12.4.6 2016/05/18 12:38:16 misho Exp $
+* $Id: net.c,v 1.16 2016/08/02 12:03:56 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -256,22 +256,22 @@ e_n2addr(sockaddr_t * __restrict addr, ait_val_t * __r
  * @psHost = Hostname
  * @port = Port
  * @addr = Network address structure
- * return: NULL error or !=NULL network structure
+ * return: 0 is error or >0 length of network structure
  */
-sockaddr_t *
+socklen_t 
 e_gethostbyname(const char *psHost, u_short port, sockaddr_t * __restrict addr)
 {
 	struct hostent *host = NULL;
 
 	if (!psHost || !addr)
-		return NULL;
+		return 0;
 
 	if (*psHost != '/') {
 		/* resolver */
 		host = gethostbyname2(psHost, !strchr(psHost, ':') ? AF_INET : AF_INET6);
 		if (!host) {
 			elwix_SetErr(EINVAL, "Resolver #%d - %s", h_errno, hstrerror(h_errno));
-			return NULL;
+			return 0;
 		} else {
 			memset(addr, 0, sizeof(sockaddr_t));
 			addr->sa.sa_family = host->h_addrtype;
@@ -290,7 +290,7 @@ e_gethostbyname(const char *psHost, u_short port, sock
 			addr->sin.sin_family = AF_INET;
 			addr->sin.sin_port = htons(port);
 			memcpy(&addr->sin.sin_addr, host->h_addr, sizeof addr->sin.sin_addr);
-			return addr;
+			return sizeof addr->sin;
 		case AF_INET6:
 #ifndef __linux__
 			addr->sin6.sin6_len = sizeof(struct sockaddr_in6);
@@ -298,7 +298,7 @@ e_gethostbyname(const char *psHost, u_short port, sock
 			addr->sin6.sin6_family = AF_INET6;
 			addr->sin6.sin6_port = htons(port);
 			memcpy(&addr->sin6.sin6_addr, host->h_addr, sizeof addr->sin6.sin6_addr);
-			return addr;
+			return sizeof addr->sin6;
 		case AF_LOCAL:
 #ifndef __linux__
 			addr->sun.sun_len = sizeof(struct sockaddr_un);
@@ -306,13 +306,41 @@ e_gethostbyname(const char *psHost, u_short port, sock
 			addr->sun.sun_family = AF_LOCAL;
 			memset(addr->sun.sun_path, 0, sizeof addr->sun.sun_path);
 			snprintf(addr->sun.sun_path, sizeof addr->sun.sun_path, "%s-%hu", psHost, port);
-			return addr;
+			return sizeof addr->sun;
 		default:
 			elwix_SetErr(EPROTONOSUPPORT, "Unsuported address family %d", addr->sa.sa_family);
 			break;
 	}
 
-	return NULL;
+	return 0;
+}
+
+/*
+ * e_addrlen() - Get address length from network structure
+ *
+ * @addr = address
+ * return: 0 is error or >0 length of network structure
+ */
+socklen_t
+e_addrlen(const sockaddr_t *addr)
+{
+	if (!addr)
+		return 0;
+
+	switch (addr->sa.sa_family) {
+		case AF_INET:
+			return sizeof addr->sin;
+		case AF_INET6:
+			return sizeof addr->sin6;
+		case AF_LOCAL:
+			return sizeof addr->sun;
+#ifndef __linux__
+		case AF_LINK:
+			return sizeof addr->sdl;
+#endif
+	}
+
+	return E_SOCKADDR_MAX;
 }
 
 /*