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git://git.acid.vegas/unrealircd.git
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73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
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/* OMG... OMG! WHAT AN INCLUDE HORROR !!! */
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#include <ares.h>
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#include <ares_version.h>
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typedef enum {
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DNSREQ_CLIENT = 1,
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DNSREQ_LINKCONF = 2,
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DNSREQ_CONNECT = 3
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} DNSReqType;
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typedef struct DNSReq DNSReq;
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/* Depending on the request type, some fields are filled in:
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* cptr: DNSREQ_CLIENT, DNSREQ_CONNECT
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* link: DNSREQ_LINKCONF, DNSREQ_CONNECT
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*/
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struct DNSReq {
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DNSReq *prev, *next;
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char *name; /**< Name being resolved (only for DNSREQ_LINKCONF and DNSREQ_CONNECT) */
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char ipv6; /**< Resolving for ipv6 or ipv4? */
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DNSReqType type; /**< DNS Request type (DNSREQ_*) */
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Client *client; /**< Client the request is for, NULL if client died OR unavailable */
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ConfigItem_link *linkblock; /**< Linkblock */
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};
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typedef struct DNSCache DNSCache;
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struct DNSCache {
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DNSCache *prev, *next; /**< Previous and next in linked list */
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DNSCache *hprev, *hnext; /**< Previous and next in hash list */
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char *name; /**< The hostname */
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char *ip; /**< The IP address */
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time_t expires; /**< When record expires */
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};
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typedef struct DNSStats DNSStats;
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struct DNSStats {
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unsigned int cache_hits;
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unsigned int cache_misses;
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unsigned int cache_adds;
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};
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/** Time to keep cache records. */
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#define DNSCACHE_TTL 600
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/** Size of the hash table (prime!).
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* Consumes <this>*4 on ia32 and <this>*4 on 64 bit
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* 241 seems a good bet.. which ~1k on ia32 and ~2k on ia64.
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*/
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#define DNS_HASH_SIZE 241
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/** Max # of entries we want in our cache.
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* This:
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* a) prevents us from using too much memory, and
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* b) prevents us from keeping useless cache records
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*
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* A dnscache item is roughly ~80 bytes in size (slightly more on x86),
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* so 241*80=~20k, which seems reasonable ;).
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*/
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#define DNS_MAX_ENTRIES DNS_HASH_SIZE
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extern ares_channel resolver_channel;
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extern void init_resolver(int);
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struct hostent *unrealdns_doclient(Client *cptr);
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extern void unreal_gethostbyname(const char *name, int family, ares_host_callback callback, void *arg);
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