res_private.h

   1 #ifndef res_9_private_h
   2 #define res_9_private_h
   3 #include <arpa/inet.h>
   4 #include <sys/time.h>
   5 #include <stdint.h>
   6
   7 /*
   8  * status codes from dns_res_xxx SPIs
   9  * positive numbers are ns_rcode values.
  10  */
  11 #define DNS_RES_STATUS_TIMEOUT -1001
  12 #define DNS_RES_STATUS_CANCELLED -1002
  13 #define DNS_RES_STATUS_INVALID_QUERY -1003
  14 #define DNS_RES_STATUS_INVALID_ARGUMENT -1004
  15 #define DNS_RES_STATUS_INVALID_RES_STATE -1005
  16 #define DNS_RES_STATUS_INVALID_REPLY -1006
  17 #define DNS_RES_STATUS_CONNECTION_REFUSED -1007
  18 #define DNS_RES_STATUS_SEND_FAILED -1008
  19 #define DNS_RES_STATUS_CONNECTION_FAILED -1009
  20 #define DNS_RES_STATUS_SYSTEM_ERROR -1010
  21
  22 #define RES_EXT_SUFFIX_LEN 64
  23
  24 typedef struct {
  25         unsigned        id :16;         /* query identification number */
  26 #if BYTE_ORDER == BIG_ENDIAN
  27                         /* fields in third byte */
  28         unsigned        qr: 1;          /* response flag */
  29         unsigned        opcode: 4;      /* purpose of message */
  30         unsigned        aa: 1;          /* authoritive answer */
  31         unsigned        tc: 1;          /* truncated message */
  32         unsigned        rd: 1;          /* recursion desired */
  33                         /* fields in fourth byte */
  34         unsigned        ra: 1;          /* recursion available */
  35         unsigned        unused :3;      /* unused bits (MBZ as of 4.9.3a3) */
  36         unsigned        rcode :4;       /* response code */
  37 #endif
  38 #if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN
  39                         /* fields in third byte */
  40         unsigned        rd :1;          /* recursion desired */
  41         unsigned        tc :1;          /* truncated message */
  42         unsigned        aa :1;          /* authoritive answer */
  43         unsigned        opcode :4;      /* purpose of message */
  44         unsigned        qr :1;          /* response flag */
  45                         /* fields in fourth byte */
  46         unsigned        rcode :4;       /* response code */
  47         unsigned        unused :3;      /* unused bits (MBZ as of 4.9.3a3) */
  48         unsigned        ra :1;          /* recursion available */
  49 #endif
  50                         /* remaining bytes */
  51         unsigned        qdcount :16;    /* number of question entries */
  52         unsigned        ancount :16;    /* number of answer entries */
  53         unsigned        nscount :16;    /* number of authority entries */
  54         unsigned        arcount :16;    /* number of resource entries */
  55 } HEADER;
  56
  57 #ifndef __res_state_ext
  58 #define __res_state_ext __res_9_res_state_ext
  59 #endif
  60
  61 struct __res_state_ext {
  62         union res_sockaddr_union nsaddrs[MAXNS];
  63         struct sort_list {
  64                 int af;
  65                 union {
  66                         struct in_addr  ina;
  67                         struct in6_addr in6a;
  68                 } addr, mask;
  69         } sort_list[MAXRESOLVSORT];
  70         char nsuffix[64];
  71         char bsuffix[64];
  72         char nsuffix2[64];
  73 };
  74
  75 #define get_nsaddr res_9_get_nsaddr
  76 struct sockaddr *get_nsaddr __P((res_state, size_t));
  77
  78 #define res_nsend_2 res_9_nsend_2
  79 int res_nsend_2(res_state, const u_char *, int, u_char *, int, struct sockaddr *, int *);
  80
  81 #define res_ourserver_p res_9_ourserver_p
  82 int res_ourserver_p(const res_state, const struct sockaddr *);
  83
  84 res_state res_state_new();
  85 void res_client_close(res_state res);
  86
  87 /*
  88  * From lookupd Thread.h.  We use this to signal threads to quit, since pthread_cancel() doesn't work.
  89  */
  90 #define ThreadStateExitRequested 4
  91
  92 /*
  93  * notification SPI
  94  */
  95 extern uint32_t notify_register_plain(const char *name, int *out_token);
  96
  97 extern int res_query_mDNSResponder(res_state statp, const char *name, int class, int type, u_char *answer, int anslen, struct sockaddr *from, uint32_t *fromlen);
  98
  99 int dns_res_once(struct sockaddr *server, struct timeval *timeout, int options, const char *name, int class, int type, u_char *res, int *reslen);
 100
 101 /*
 102  * Interrupt a thread blocked in select()
 103  */
 104 void res_interrupt_requests_enable(void);
 105 void res_interrupt_requests_disable(void);
 106 void res_interrupt_request(void *token);
 107 void *res_init_interrupt_token(void);
 108 void res_delete_interrupt_token(void *token);
 109
 110 #endif