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https://github.com/SoftEtherVPN/SoftEtherVPN.git
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86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
#ifndef DNS_H
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#define DNS_H
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#include "Network.h"
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#define DNS_CACHE_EXPIRATION (10 * 60 * 1000)
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#ifndef USE_STRATEGY_LOW_MEMORY
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#define DNS_THREAD_DEFAULT_NUM_MAX (512)
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#else
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#define DNS_THREAD_DEFAULT_NUM_MAX (64)
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#endif
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#define DNS_RESOLVE_DEFAULT_TIMEOUT (2300)
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#define DNS_RESOLVE_REVERSE_DEFAULT_TIMEOUT (500)
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#define GetIP(ip, hostname) (GetIPEx(ip, hostname, 0, NULL))
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#define GetIP4(ip, hostname) (GetIP4Ex(ip, hostname, 0, NULL))
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#define GetIP6(ip, hostname) (GetIP6Ex(ip, hostname, 0, NULL))
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#define GetIP4Ex(ip, hostname, timeout, cancel_flag) (DnsResolve(NULL, ip, hostname, timeout, cancel_flag))
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#define GetIP6Ex(ip, hostname, timeout, cancel_flag) (DnsResolve(ip, NULL, hostname, timeout, cancel_flag))
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struct DNS_CACHE
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{
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const char *Hostname;
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LIST *IPList_v4;
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LIST *IPList_v6;
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UINT64 Expiration;
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};
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struct DNS_CACHE_REVERSE
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{
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IP IP;
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char *Hostname;
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UINT64 Expiration;
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};
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struct DNS_RESOLVER
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{
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REF *Ref;
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const char *Hostname;
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LIST *IPList_v4;
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LIST *IPList_v6;
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bool OK;
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};
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struct DNS_RESOLVER_REVERSE
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{
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REF *Ref;
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IP IP;
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char *Hostname;
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bool OK;
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};
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void DnsInit();
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void DnsFree();
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UINT DnsThreadNum();
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UINT DnsThreadNumMax();
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void DnsThreadNumMaxSet(const UINT num);
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bool DnsCacheIsEnabled();
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void DnsCacheToggle(const bool enabled);
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DNS_CACHE *DnsCacheFind(const char *hostname);
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DNS_CACHE *DnsCacheUpdate(const char *hostname, const IP *ipv6, const IP *ipv4);
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DNS_CACHE *DnsCacheUpdateEx(const char *hostname, const LIST *iplist_v6, const LIST *iplist_v4);
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DNS_CACHE_REVERSE *DnsCacheReverseFind(const IP *ip);
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DNS_CACHE_REVERSE *DnsCacheReverseUpdate(const IP *ip, const char *hostname);
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bool DnsResolve(IP *ipv6, IP *ipv4, const char *hostname, UINT timeout, volatile const bool *cancel_flag);
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bool DnsResolveEx(LIST **iplist_v6, LIST **iplist_v4, const char *hostname, UINT timeout, volatile const bool *cancel_flag);
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void DnsResolver(THREAD *t, void *param);
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bool DnsResolveReverse(char *dst, const UINT size, const IP *ip, UINT timeout, volatile const bool *cancel_flag);
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void DnsResolverReverse(THREAD *t, void *param);
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bool GetIPEx(IP *ip, const char *hostname, UINT timeout, volatile const bool *cancel_flag);
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void ReleaseDnsResolver(DNS_RESOLVER *p);
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void ReleaseDnsResolverReverse(DNS_RESOLVER_REVERSE *p);
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#endif
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