| /**************************************************************************** |
| * libs/libc/netdb/lib_dnsqueryfamily.c |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| |
| #include <sys/types.h> |
| #include <errno.h> |
| #include <assert.h> |
| #include <debug.h> |
| |
| #include "netdb/lib_dns.h" |
| |
| /**************************************************************************** |
| * Private Data |
| ****************************************************************************/ |
| |
| static int g_query_family = AF_UNSPEC; |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: dns_is_queryfamily |
| * |
| * Description: |
| * Determine if the specified address family is available for DNS query. |
| * |
| ****************************************************************************/ |
| |
| bool dns_is_queryfamily(sa_family_t family) |
| { |
| DEBUGASSERT(family == AF_INET || family == AF_INET6); |
| |
| return g_query_family == AF_UNSPEC || g_query_family == family; |
| } |
| |
| /**************************************************************************** |
| * Name: dns_set_queryfamily |
| * |
| * Description: |
| * Configure the address family to be used for queries. |
| * |
| ****************************************************************************/ |
| |
| int dns_set_queryfamily(sa_family_t family) |
| { |
| int ret = OK; |
| |
| switch (family) |
| { |
| #ifdef CONFIG_NET_IPv4 |
| case AF_INET: |
| #endif |
| #ifdef CONFIG_NET_IPv6 |
| case AF_INET6: |
| #endif |
| case AF_UNSPEC: |
| if (g_query_family != family) |
| { |
| dns_lock(); |
| g_query_family = family; |
| dns_unlock(); |
| #if CONFIG_NETDB_DNSCLIENT_ENTRIES > 0 |
| dns_clear_answer(); |
| #endif |
| ninfo("Configure address family for dns query: %d\n", family); |
| } |
| |
| break; |
| default: |
| nerr("ERROR: Unsupported family: %d\n", family); |
| ret = -ENOSYS; |
| break; |
| } |
| |
| return ret; |
| } |
| |