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/* $OpenBSD: asr.h,v 1.7 2013/07/12 14:36:21 eric Exp $ */
/*
* Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
/*
* This part is the generic API for the async mechanism. It could be useful
* beyond the resolver.
*/
/* Return values for async_run() */
#define ASYNC_COND 0 /* wait for fd condition */
#define ASYNC_YIELD 1 /* partial result */
#define ASYNC_DONE 2 /* done */
/* Expected fd conditions */
#define ASYNC_READ 1
#define ASYNC_WRITE 2
/* This opaque structure holds an async query state. */
struct async;
/*
* This is the structure through which async_run() returns async
* results to the caller.
*/
struct async_res {
int ar_cond;
int ar_fd;
int ar_timeout;
int ar_errno;
int ar_h_errno;
int ar_gai_errno;
int ar_rrset_errno;
int ar_count;
int ar_rcode;
void *ar_data;
int ar_datalen;
union {
struct sockaddr sa;
struct sockaddr_in sain;
struct sockaddr_in6 sain6;
} ar_sa;
struct addrinfo *ar_addrinfo;
struct rrsetinfo *ar_rrsetinfo;
struct hostent *ar_hostent;
struct netent *ar_netent;
};
int asr_async_run(struct async *, struct async_res *);
int asr_async_run_sync(struct async *, struct async_res *);
void asr_async_abort(struct async *);
/* This opaque structure holds an async resolver context. */
struct asr;
struct asr *asr_resolver(const char *);
void asr_resolver_done(struct asr *);
/* Async version of the resolver API */
struct async *res_send_async(const unsigned char *, int, struct asr *);
struct async *res_query_async(const char *, int, int, struct asr *);
struct async *res_search_async(const char *, int, int, struct asr *);
struct async *getrrsetbyname_async(const char *, unsigned int, unsigned int,
unsigned int, struct asr *);
struct async *gethostbyname_async(const char *, struct asr *);
struct async *gethostbyname2_async(const char *, int, struct asr *);
struct async *gethostbyaddr_async(const void *, socklen_t, int, struct asr *);
struct async *getnetbyname_async(const char *, struct asr *);
struct async *getnetbyaddr_async(in_addr_t, int, struct asr *);
struct async *getaddrinfo_async(const char *, const char *,
const struct addrinfo *, struct asr *);
struct async *getnameinfo_async(const struct sockaddr *, socklen_t, char *,
size_t, char *, size_t, int, struct asr *);
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