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diff --git a/nameser.h b/nameser.h
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+
+#ifndef ARES_NAMESER_H
+#define ARES_NAMESER_H
+
+/* header file provided by liren@vivisimo.com */
+
+#ifndef HAVE_ARPA_NAMESER_H
+
+#define NS_PACKETSZ 512 /* maximum packet size */
+#define NS_MAXDNAME 256 /* maximum domain name */
+#define NS_MAXCDNAME 255 /* maximum compressed domain name */
+#define NS_MAXLABEL 63
+#define NS_HFIXEDSZ 12 /* #/bytes of fixed data in header */
+#define NS_QFIXEDSZ 4 /* #/bytes of fixed data in query */
+#define NS_RRFIXEDSZ 10 /* #/bytes of fixed data in r record */
+#define NS_INT16SZ 2
+#define NS_INADDRSZ 4
+#define NS_IN6ADDRSZ 16
+#define NS_CMPRSFLGS 0xc0 /* Flag bits indicating name compression. */
+#define NS_DEFAULTPORT 53 /* For both TCP and UDP. */
+
+typedef enum __ns_class {
+ ns_c_invalid = 0, /* Cookie. */
+ ns_c_in = 1, /* Internet. */
+ ns_c_2 = 2, /* unallocated/unsupported. */
+ ns_c_chaos = 3, /* MIT Chaos-net. */
+ ns_c_hs = 4, /* MIT Hesiod. */
+ /* Query class values which do not appear in resource records */
+ ns_c_none = 254, /* for prereq. sections in update requests */
+ ns_c_any = 255, /* Wildcard match. */
+ ns_c_max = 65536
+} ns_class;
+
+typedef enum __ns_type {
+ ns_t_invalid = 0, /* Cookie. */
+ ns_t_a = 1, /* Host address. */
+ ns_t_ns = 2, /* Authoritative server. */
+ ns_t_md = 3, /* Mail destination. */
+ ns_t_mf = 4, /* Mail forwarder. */
+ ns_t_cname = 5, /* Canonical name. */
+ ns_t_soa = 6, /* Start of authority zone. */
+ ns_t_mb = 7, /* Mailbox domain name. */
+ ns_t_mg = 8, /* Mail group member. */
+ ns_t_mr = 9, /* Mail rename name. */
+ ns_t_null = 10, /* Null resource record. */
+ ns_t_wks = 11, /* Well known service. */
+ ns_t_ptr = 12, /* Domain name pointer. */
+ ns_t_hinfo = 13, /* Host information. */
+ ns_t_minfo = 14, /* Mailbox information. */
+ ns_t_mx = 15, /* Mail routing information. */
+ ns_t_txt = 16, /* Text strings. */
+ ns_t_rp = 17, /* Responsible person. */
+ ns_t_afsdb = 18, /* AFS cell database. */
+ ns_t_x25 = 19, /* X_25 calling address. */
+ ns_t_isdn = 20, /* ISDN calling address. */
+ ns_t_rt = 21, /* Router. */
+ ns_t_nsap = 22, /* NSAP address. */
+ ns_t_nsap_ptr = 23, /* Reverse NSAP lookup (deprecated). */
+ ns_t_sig = 24, /* Security signature. */
+ ns_t_key = 25, /* Security key. */
+ ns_t_px = 26, /* X.400 mail mapping. */
+ ns_t_gpos = 27, /* Geographical position (withdrawn). */
+ ns_t_aaaa = 28, /* Ip6 Address. */
+ ns_t_loc = 29, /* Location Information. */
+ ns_t_nxt = 30, /* Next domain (security). */
+ ns_t_eid = 31, /* Endpoint identifier. */
+ ns_t_nimloc = 32, /* Nimrod Locator. */
+ ns_t_srv = 33, /* Server Selection. */
+ ns_t_atma = 34, /* ATM Address */
+ ns_t_naptr = 35, /* Naming Authority PoinTeR */
+ ns_t_kx = 36, /* Key Exchange */
+ ns_t_cert = 37, /* Certification record */
+ ns_t_a6 = 38, /* IPv6 address (deprecates AAAA) */
+ ns_t_dname = 39, /* Non-terminal DNAME (for IPv6) */
+ ns_t_sink = 40, /* Kitchen sink (experimentatl) */
+ ns_t_opt = 41, /* EDNS0 option (meta-RR) */
+ ns_t_apl = 42, /* Address prefix list (RFC3123) */
+ ns_t_ds = 43, /* Delegation Signer (RFC4034) */
+ ns_t_sshfp = 44, /* SSH Key Fingerprint (RFC4255) */
+ ns_t_rrsig = 46, /* Resource Record Signature (RFC4034) */
+ ns_t_nsec = 47, /* Next Secure (RFC4034) */
+ ns_t_dnskey = 48, /* DNS Public Key (RFC4034) */
+ ns_t_tkey = 249, /* Transaction key */
+ ns_t_tsig = 250, /* Transaction signature. */
+ ns_t_ixfr = 251, /* Incremental zone transfer. */
+ ns_t_axfr = 252, /* Transfer zone of authority. */
+ ns_t_mailb = 253, /* Transfer mailbox records. */
+ ns_t_maila = 254, /* Transfer mail agent records. */
+ ns_t_any = 255, /* Wildcard match. */
+ ns_t_zxfr = 256, /* BIND-specific, nonstandard. */
+ ns_t_max = 65536
+} ns_type;
+
+typedef enum __ns_opcode {
+ ns_o_query = 0, /* Standard query. */
+ ns_o_iquery = 1, /* Inverse query (deprecated/unsupported). */
+ ns_o_status = 2, /* Name server status query (unsupported). */
+ /* Opcode 3 is undefined/reserved. */
+ ns_o_notify = 4, /* Zone change notification. */
+ ns_o_update = 5, /* Zone update message. */
+ ns_o_max = 6
+} ns_opcode;
+
+typedef enum __ns_rcode {
+ ns_r_noerror = 0, /* No error occurred. */
+ ns_r_formerr = 1, /* Format error. */
+ ns_r_servfail = 2, /* Server failure. */
+ ns_r_nxdomain = 3, /* Name error. */
+ ns_r_notimpl = 4, /* Unimplemented. */
+ ns_r_refused = 5, /* Operation refused. */
+ /* these are for BIND_UPDATE */
+ ns_r_yxdomain = 6, /* Name exists */
+ ns_r_yxrrset = 7, /* RRset exists */
+ ns_r_nxrrset = 8, /* RRset does not exist */
+ ns_r_notauth = 9, /* Not authoritative for zone */
+ ns_r_notzone = 10, /* Zone of record different from zone section */
+ ns_r_max = 11,
+ /* The following are TSIG extended errors */
+ ns_r_badsig = 16,
+ ns_r_badkey = 17,
+ ns_r_badtime = 18
+} ns_rcode;
+
+#endif /* HAVE_ARPA_NAMESER_H */
+
+#ifndef HAVE_ARPA_NAMESER_COMPAT_H
+
+#define PACKETSZ NS_PACKETSZ
+#define MAXDNAME NS_MAXDNAME
+#define MAXCDNAME NS_MAXCDNAME
+#define MAXLABEL NS_MAXLABEL
+#define HFIXEDSZ NS_HFIXEDSZ
+#define QFIXEDSZ NS_QFIXEDSZ
+#define RRFIXEDSZ NS_RRFIXEDSZ
+#define INDIR_MASK NS_CMPRSFLGS
+#define NAMESERVER_PORT NS_DEFAULTPORT
+
+#define QUERY ns_o_query
+
+#define SERVFAIL ns_r_servfail
+#define NOTIMP ns_r_notimpl
+#define REFUSED ns_r_refused
+#undef NOERROR /* it seems this is already defined in winerror.h */
+#define NOERROR ns_r_noerror
+#define FORMERR ns_r_formerr
+#define NXDOMAIN ns_r_nxdomain
+
+#define C_IN ns_c_in
+#define C_CHAOS ns_c_chaos
+#define C_HS ns_c_hs
+#define C_NONE ns_c_none
+#define C_ANY ns_c_any
+
+#define T_A ns_t_a
+#define T_NS ns_t_ns
+#define T_MD ns_t_md
+#define T_MF ns_t_mf
+#define T_CNAME ns_t_cname
+#define T_SOA ns_t_soa
+#define T_MB ns_t_mb
+#define T_MG ns_t_mg
+#define T_MR ns_t_mr
+#define T_NULL ns_t_null
+#define T_WKS ns_t_wks
+#define T_PTR ns_t_ptr
+#define T_HINFO ns_t_hinfo
+#define T_MINFO ns_t_minfo
+#define T_MX ns_t_mx
+#define T_TXT ns_t_txt
+#define T_RP ns_t_rp
+#define T_AFSDB ns_t_afsdb
+#define T_X25 ns_t_x25
+#define T_ISDN ns_t_isdn
+#define T_RT ns_t_rt
+#define T_NSAP ns_t_nsap
+#define T_NSAP_PTR ns_t_nsap_ptr
+#define T_SIG ns_t_sig
+#define T_KEY ns_t_key
+#define T_PX ns_t_px
+#define T_GPOS ns_t_gpos
+#define T_AAAA ns_t_aaaa
+#define T_LOC ns_t_loc
+#define T_NXT ns_t_nxt
+#define T_EID ns_t_eid
+#define T_NIMLOC ns_t_nimloc
+#define T_SRV ns_t_srv
+#define T_ATMA ns_t_atma
+#define T_NAPTR ns_t_naptr
+#define T_DS ns_t_ds
+#define T_SSHFP ns_t_sshfp
+#define T_RRSIG ns_t_rrsig
+#define T_NSEC ns_t_nsec
+#define T_DNSKEY ns_t_dnskey
+#define T_TSIG ns_t_tsig
+#define T_IXFR ns_t_ixfr
+#define T_AXFR ns_t_axfr
+#define T_MAILB ns_t_mailb
+#define T_MAILA ns_t_maila
+#define T_ANY ns_t_any
+
+#endif /* HAVE_ARPA_NAMESER_COMPAT_H */
+
+#endif /* ARES_NAMESER_H */