--- libelwix/src/net.c	2014/11/17 22:26:56	1.10.10.1
+++ libelwix/src/net.c	2014/11/17 23:00:36	1.10.10.3
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: net.c,v 1.10.10.1 2014/11/17 22:26:56 misho Exp $
+* $Id: net.c,v 1.10.10.3 2014/11/17 23:00:36 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -442,7 +442,7 @@ e_getnet(const char *net)
  *
  * @ifname = interface name
  * @addr = if addr is !=NULL then set this for new address
- * return: NULL error or !=NULL get ethernet address
+ * return: NULL error or !=NULL get ethernet address should be e_free()
  */
 ether_addr_t *
 e_ether_addr(const char *ifname, ether_addr_t * __restrict addr)
@@ -490,4 +490,34 @@ e_get1stiface(char *szIface, int iflen)
 	strlcpy(szIface, ifa->ifa_name, iflen);
 	freeifaddrs(ifa);
 	return 0;
+}
+
+/*
+ * e_getifacebyname() - Get interface and make network structure
+ *
+ * @psIface = Interface, if =NULL first interface
+ * @addr = Network address structure
+ * return: NULL error or !=NULL network structure
+ */
+sockaddr_t *
+e_getifacebyname(const char *psIface, sockaddr_t * __restrict addr)
+{
+	char szIface[64] = { [0 ... 63] = 0 };
+	struct ifaddrs *p, *ifa = NULL;
+
+	if (!addr)
+		return NULL;
+
+	memset(addr, 0, sizeof(sockaddr_t));
+	getifaddrs(&ifa);
+	strlcpy(szIface, psIface ? psIface : ifa->ifa_name, sizeof szIface);
+	for (p = ifa; p && p->ifa_name; p++)
+		if (p->ifa_name && !strcmp(p->ifa_name, szIface) && p->ifa_addr && 
+				p->ifa_addr->sa_family == AF_LINK) {
+			memcpy(&addr->sdl, p->ifa_addr, sizeof(struct sockaddr_dl));
+			break;
+		}
+	freeifaddrs(ifa);
+
+	return addr;
 }