/*********************************************************************************
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* Copyright: (C) 2018 LingYun IoT Studio
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* All rights reserved.
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*
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* Filename: dns_api.h
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* Description: This file is DNS client API based on UDP socket
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*
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* Version: 1.0.0(10/29/2018)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "2018-10-28 01:38:08 PM"
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*
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********************************************************************************/
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#ifndef __DNS_API_
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#define __DNS_API_
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#define IPADDR_LEN 16
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#define DNS_HEAD_MIN 12
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#define DNS_TAIL_MIN 5
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int query_dns(char *dns_server_ip, char *domain, char *ipaddr, int ipaddr_size);
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#endif
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