Index: config.h.in
==================================================================
--- config.h.in
+++ config.h.in
@@ -21,10 +21,16 @@
 /* Define to 1 if you have fopen_net from libopennet */
 #undef HAVE_LIBOPENNET
 
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
+
+/* Define to 1 if you have the <netdb.h> header file. */
+#undef HAVE_NETDB_H
+
+/* Define to 1 if you have the <netinet/in.h> header file. */
+#undef HAVE_NETINET_IN_H
 
 /* Define to 1 if you have the <opennet.h> header file. */
 #undef HAVE_OPENNET_H
 
 /* Define to 1 if you have the <pwd.h> header file. */

Index: configure
==================================================================
--- configure
+++ configure
@@ -16646,11 +16646,13 @@
 
 
 
 
 
-for ac_header in ctype.h dirent.h pwd.h stdio.h stdlib.h string.h sys/stat.h sys/time.h sys/types.h time.h unistd.h
+
+
+for ac_header in ctype.h dirent.h pwd.h stdio.h stdlib.h string.h sys/stat.h sys/time.h sys/types.h time.h unistd.h netdb.h netinet/in.h
 do
 as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
 if eval "test \"\${$as_ac_Header+set}\" = set"; then
   echo "$as_me:$LINENO: checking for $ac_header" >&5
 echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
@@ -16794,10 +16796,11 @@
 _ACEOF
 
 fi
 
 done
+
 
 echo "$as_me:$LINENO: checking whether time.h and sys/time.h may both be included" >&5
 echo $ECHO_N "checking whether time.h and sys/time.h may both be included... $ECHO_C" >&6
 if test "${ac_cv_header_time+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6

Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -32,15 +32,16 @@
 dnl changed later (by AC_REPLACE_FUNCS, for example) you must call
 dnl DC_SYNC_SHLIBOBJS again.
 DC_GET_SHOBJFLAGS
 
 dnl This stuff has to come after the shobjtest to verify that it is correct
-AC_CHECK_HEADERS(ctype.h dirent.h pwd.h stdio.h stdlib.h string.h sys/stat.h sys/time.h sys/types.h time.h unistd.h)
+AC_CHECK_HEADERS(ctype.h dirent.h pwd.h stdio.h stdlib.h string.h sys/stat.h sys/time.h sys/types.h time.h unistd.h netdb.h netinet/in.h)
+
 AC_HEADER_TIME
 
 AC_REPLACE_FUNCS(strsep strtoll getuid)
 AC_CHECK_FUNCS(getpwuid)
 
 dnl This MUST be last.
 DC_SYNC_SHLIBOBJS
 
 AC_OUTPUT(Makefile lc_geterrno.3 lc_process.3 lc_register_var.3 lc_geterrstr.3 lc_register_callback.3 lc_cleanup.3 lc_process_file.3 libconfig.3)

Index: libconfig.c
==================================================================
--- libconfig.c
+++ libconfig.c
@@ -33,10 +33,14 @@
 #endif
 
 #ifdef HAVE_PWD_H
 #include <pwd.h>
 #endif
+
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
 
 struct lc_varhandler_st *varhandlers = NULL;
 lc_err_t lc_errno = LC_ERR_NONE;
 const char *lc_err_usererrmsg = NULL;
 const char *lc_errfile = NULL;
@@ -58,60 +62,116 @@
 
 static int lc_process_var_cidr(void *data, const char *value, const char **endptr) {
 	return(-1);
 }
 
-static int lc_process_var_addr4(uint32_t *data, const char *value, const char **endptr) {
-	return(-1);
-}
-
-static int lc_process_var_addr6(void *data, const char *value, const char **endptr) {
-	return(-1);
-}
-
 static int lc_process_var_hostname4(uint32_t *data, const char *value, const char **endptr) {
-	return(-1);
+	struct hostent *ghbn_ret;
+
+	ghbn_ret = gethostbyname(value);
+	if (ghbn_ret == NULL) {
+		return(-1);
+	}
+
+	if (ghbn_ret->h_length != 4) {
+		return(-1);
+	}
+
+	memcpy(data, ghbn_ret->h_addr_list[0], sizeof(*data));
+
+	*data = ntohl(*data);
+
+	return(0);
 }
 
 static int lc_process_var_hostname6(void *data, const char *value, const char **endptr) {
 	return(-1);
 }
+
+static int lc_process_var_ip4(uint32_t *data, const char *value, const char **endptr) {
+	uint32_t ipval = 0, curr_ipval = 0;
+	const char *valptr;
+	int retval = 0;
+	int dotcount = 0;
+
+	for (valptr = value; *valptr; valptr++) {
+		if (!isdigit(*valptr)) {
+			if (*valptr == '.' || *valptr == ',') {
+				dotcount++;
+				if (dotcount >= 4) {
+					retval = -1;
+					break;
+				}
+
+				if (curr_ipval > 255) {
+					retval = -1;
+					break;
+				}
+
+				ipval <<= 8;
+				ipval |= curr_ipval;
+				curr_ipval = 0;
+
+				/* For lists */
+				if (*valptr == ',') {
+					break;
+				}
+
+				continue;
+			} else {
+				retval = -1;
+				break;
+			}
+		}
+
+		curr_ipval *= 10;
+		curr_ipval += *valptr - '0';
+	}
+
+	if (retval == 0) {
+		ipval <<= 8;
+		ipval |= curr_ipval;
+
+		*data = ipval;
+	}
+
+	return(retval);
+}
 
 static int lc_process_var_ip6(void *data, const char *value, const char **endptr) {
 	return(-1);
 }
 
-static int lc_process_var_ip4(uint32_t *data, const char *value, const char **endptr) {
-	const char *dotptr = NULL;
-	int tmpval = -1, retval = 0;
-
-	dotptr = value;
-
-	while (1) {
-		tmpval = atoi(dotptr);
-		if (tmpval < 0) {
-			break;
-		}
-
-		retval <<= 8;
-		retval |= tmpval;
-
-		dotptr = strpbrk(dotptr, "./ \t");
-		if (dotptr == NULL) {
-			break;
-		}
-		if (*dotptr != '.') {
-			break;
-		}
-		dotptr++;
-	}
-
-	*data = retval;
-
-	*endptr = (char *) dotptr;
-
-	return(0);
+static int lc_process_var_addr4(uint32_t *data, const char *value, const char **endptr) {
+	int lc_pv_ret;
+
+	lc_pv_ret = lc_process_var_ip4(data, value, endptr);
+	if (lc_pv_ret == 0) {
+		return(lc_pv_ret);
+	}
+
+	lc_pv_ret = lc_process_var_hostname4(data, value, endptr);
+	if (lc_pv_ret == 0) {
+		return(lc_pv_ret);
+	}
+
+	return(-1);
+}
+
+static int lc_process_var_addr6(void *data, const char *value, const char **endptr) {
+	int lc_pv_ret;
+
+	lc_pv_ret = lc_process_var_ip6(data, value, endptr);
+	if (lc_pv_ret == 0) {
+		return(lc_pv_ret);
+	}
+
+	lc_pv_ret = lc_process_var_hostname6(data, value, endptr);
+	if (lc_pv_ret == 0) {
+		return(lc_pv_ret);
+	}
+	return(-1);
 }
 
 static int lc_process_var_longlong(long long *data, const char *value, const char **endptr) {
 	*data = strtoll(value, (char **) endptr, 10);