lookup.h (1478B)
1 #ifndef LOOKUP_H 2 #define LOOKUP_H 3 4 #include <stdint.h> 5 #include <stddef.h> 6 #include <features.h> 7 #include <netinet/in.h> 8 #include <netdb.h> 9 10 struct aibuf { 11 struct addrinfo ai; 12 union sa { 13 struct sockaddr_in sin; 14 struct sockaddr_in6 sin6; 15 } sa; 16 volatile int lock[1]; 17 short slot, ref; 18 }; 19 20 struct address { 21 int family; 22 unsigned scopeid; 23 uint8_t addr[16]; 24 int sortkey; 25 }; 26 27 struct service { 28 uint16_t port; 29 unsigned char proto, socktype; 30 }; 31 32 #define MAXNS 3 33 34 struct resolvconf { 35 struct address ns[MAXNS]; 36 unsigned nns, attempts, ndots; 37 unsigned timeout; 38 }; 39 40 /* The limit of 48 results is a non-sharp bound on the number of addresses 41 * that can fit in one 512-byte DNS packet full of v4 results and a second 42 * packet full of v6 results. Due to headers, the actual limit is lower. */ 43 #define MAXADDRS 48 44 #define MAXSERVS 2 45 46 hidden int __lookup_serv(struct service buf[MAXSERVS], const char *name, int proto, int socktype, int flags); 47 hidden int __lookup_name(struct address buf[MAXADDRS], char canon[256], const char *name, int family, int flags); 48 hidden int __lookup_ipliteral(struct address buf[1], const char *name, int family); 49 50 hidden int __get_resolv_conf(struct resolvconf *, char *, size_t); 51 hidden int __res_msend_rc(int, const unsigned char *const *, const int *, unsigned char *const *, int *, int, const struct resolvconf *); 52 53 hidden int __dns_parse(const unsigned char *, int, int (*)(void *, int, const void *, int, const void *, int), void *); 54 55 #endif