src/network/lookup.h

   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[static MAXSERVS], const char *name, int proto, int socktype, int flags);
  47 hidden int __lookup_name(struct address buf[static MAXADDRS], char canon[static 256], const char *name, int family, int flags);
  48 hidden int __lookup_ipliteral(struct address buf[static 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 *), void *);
  54
  55 #endif