141 lines
4.6 KiB
C
141 lines
4.6 KiB
C
/* $Id$ */
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/* Copyright 1998 by the Massachusetts Institute of Technology.
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*
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* Permission to use, copy, modify, and distribute this
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* software and its documentation for any purpose and without
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* fee is hereby granted, provided that the above copyright
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* notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting
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* documentation, and that the name of M.I.T. not be used in
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* advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission.
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* M.I.T. makes no representations about the suitability of
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* this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*/
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#ifndef ARES__H
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#define ARES__H
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#include <sys/types.h>
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#if defined(_AIX) || defined(NETWARE)
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/* HP-UX systems version 9, 10 and 11 lack sys/select.h and so does oldish
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libc5-based Linux systems. Only include it on system that are known to
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require it! */
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#include <sys/select.h>
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#endif
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#ifdef WIN32
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#include <winsock.h>
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#include <windows.h>
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#else
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#include <netinet/in.h>
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#endif
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#define ARES_SUCCESS 0
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/* Server error codes (ARES_ENODATA indicates no relevant answer) */
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#define ARES_ENODATA 1
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#define ARES_EFORMERR 2
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#define ARES_ESERVFAIL 3
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#define ARES_ENOTFOUND 4
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#define ARES_ENOTIMP 5
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#define ARES_EREFUSED 6
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/* Locally generated error codes */
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#define ARES_EBADQUERY 7
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#define ARES_EBADNAME 8
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#define ARES_EBADFAMILY 9
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#define ARES_EBADRESP 10
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#define ARES_ECONNREFUSED 11
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#define ARES_ETIMEOUT 12
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#define ARES_EOF 13
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#define ARES_EFILE 14
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#define ARES_ENOMEM 15
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#define ARES_EDESTRUCTION 16
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#define ARES_EBADSTR 17
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/* Flag values */
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#define ARES_FLAG_USEVC (1 << 0)
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#define ARES_FLAG_PRIMARY (1 << 1)
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#define ARES_FLAG_IGNTC (1 << 2)
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#define ARES_FLAG_NORECURSE (1 << 3)
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#define ARES_FLAG_STAYOPEN (1 << 4)
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#define ARES_FLAG_NOSEARCH (1 << 5)
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#define ARES_FLAG_NOALIASES (1 << 6)
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#define ARES_FLAG_NOCHECKRESP (1 << 7)
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/* Option mask values */
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#define ARES_OPT_FLAGS (1 << 0)
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#define ARES_OPT_TIMEOUT (1 << 1)
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#define ARES_OPT_TRIES (1 << 2)
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#define ARES_OPT_NDOTS (1 << 3)
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#define ARES_OPT_UDP_PORT (1 << 4)
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#define ARES_OPT_TCP_PORT (1 << 5)
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#define ARES_OPT_SERVERS (1 << 6)
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#define ARES_OPT_DOMAINS (1 << 7)
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#define ARES_OPT_LOOKUPS (1 << 8)
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struct ares_options {
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int flags;
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int timeout;
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int tries;
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int ndots;
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unsigned short udp_port;
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unsigned short tcp_port;
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struct in_addr *servers;
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int nservers;
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char **domains;
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int ndomains;
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char *lookups;
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};
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struct hostent;
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struct timeval;
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struct ares_channeldata;
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typedef struct ares_channeldata *ares_channel;
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typedef void (*ares_callback)(void *arg, int status, unsigned char *abuf,
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int alen);
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typedef void (*ares_host_callback)(void *arg, int status,
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struct hostent *hostent);
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int ares_init(ares_channel *channelptr);
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int ares_init_options(ares_channel *channelptr, struct ares_options *options,
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int optmask);
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void ares_destroy(ares_channel channel);
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void ares_cancel(ares_channel channel);
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void ares_send(ares_channel channel, const unsigned char *qbuf, int qlen,
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ares_callback callback, void *arg);
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void ares_query(ares_channel channel, const char *name, int dnsclass,
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int type, ares_callback callback, void *arg);
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void ares_search(ares_channel channel, const char *name, int dnsclass,
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int type, ares_callback callback, void *arg);
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void ares_gethostbyname(ares_channel channel, const char *name, int family,
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ares_host_callback callback, void *arg);
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void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen,
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int family, ares_host_callback callback, void *arg);
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int ares_fds(ares_channel channel, fd_set *read_fds, fd_set *write_fds);
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struct timeval *ares_timeout(ares_channel channel, struct timeval *maxtv,
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struct timeval *tv);
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void ares_process(ares_channel channel, fd_set *read_fds, fd_set *write_fds);
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int ares_mkquery(const char *name, int dnsclass, int type, unsigned short id,
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int rd, unsigned char **buf, int *buflen);
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int ares_expand_name(const unsigned char *encoded, const unsigned char *abuf,
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int alen, char **s, long *enclen);
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int ares_expand_string(const unsigned char *encoded, const unsigned char *abuf,
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int alen, unsigned char **s, long *enclen);
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int ares_parse_a_reply(const unsigned char *abuf, int alen,
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struct hostent **host);
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int ares_parse_ptr_reply(const unsigned char *abuf, int alen, const void *addr,
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int addrlen, int family, struct hostent **host);
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void ares_free_string(void *str);
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void ares_free_hostent(struct hostent *host);
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const char *ares_strerror(int code);
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void ares_free_errmem(char *mem);
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#endif /* ARES__H */
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