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+/*
+ * Copyright (c) 1995 - 2002 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* $Id: resolve.h,v 1.24 2005/04/12 11:29:02 lha Exp $ */
+
+#ifndef __RESOLVE_H__
+#define __RESOLVE_H__
+
+#ifndef ROKEN_LIB_FUNCTION
+#ifdef _WIN32
+#define ROKEN_LIB_FUNCTION _stdcall
+#else
+#define ROKEN_LIB_FUNCTION
+#endif
+#endif
+
+typedef enum {
+ rk_ns_t_invalid = 0, /* Cookie. */
+ rk_ns_t_a = 1, /* Host address. */
+ rk_ns_t_ns = 2, /* Authoritative server. */
+ rk_ns_t_md = 3, /* Mail destination. */
+ rk_ns_t_mf = 4, /* Mail forwarder. */
+ rk_ns_t_cname = 5, /* Canonical name. */
+ rk_ns_t_soa = 6, /* Start of authority zone. */
+ rk_ns_t_mb = 7, /* Mailbox domain name. */
+ rk_ns_t_mg = 8, /* Mail group member. */
+ rk_ns_t_mr = 9, /* Mail rename name. */
+ rk_ns_t_null = 10, /* Null resource record. */
+ rk_ns_t_wks = 11, /* Well known service. */
+ rk_ns_t_ptr = 12, /* Domain name pointer. */
+ rk_ns_t_hinfo = 13, /* Host information. */
+ rk_ns_t_minfo = 14, /* Mailbox information. */
+ rk_ns_t_mx = 15, /* Mail routing information. */
+ rk_ns_t_txt = 16, /* Text strings. */
+ rk_ns_t_rp = 17, /* Responsible person. */
+ rk_ns_t_afsdb = 18, /* AFS cell database. */
+ rk_ns_t_x25 = 19, /* X_25 calling address. */
+ rk_ns_t_isdn = 20, /* ISDN calling address. */
+ rk_ns_t_rt = 21, /* Router. */
+ rk_ns_t_nsap = 22, /* NSAP address. */
+ rk_ns_t_nsap_ptr = 23, /* Reverse NSAP lookup (deprecated). */
+ rk_ns_t_sig = 24, /* Security signature. */
+ rk_ns_t_key = 25, /* Security key. */
+ rk_ns_t_px = 26, /* X.400 mail mapping. */
+ rk_ns_t_gpos = 27, /* Geographical position (withdrawn). */
+ rk_ns_t_aaaa = 28, /* Ip6 Address. */
+ rk_ns_t_loc = 29, /* Location Information. */
+ rk_ns_t_nxt = 30, /* Next domain (security). */
+ rk_ns_t_eid = 31, /* Endpoint identifier. */
+ rk_ns_t_nimloc = 32, /* Nimrod Locator. */
+ rk_ns_t_srv = 33, /* Server Selection. */
+ rk_ns_t_atma = 34, /* ATM Address */
+ rk_ns_t_naptr = 35, /* Naming Authority PoinTeR */
+ rk_ns_t_kx = 36, /* Key Exchange */
+ rk_ns_t_cert = 37, /* Certification record */
+ rk_ns_t_a6 = 38, /* IPv6 address (deprecates AAAA) */
+ rk_ns_t_dname = 39, /* Non-terminal DNAME (for IPv6) */
+ rk_ns_t_sink = 40, /* Kitchen sink (experimentatl) */
+ rk_ns_t_opt = 41, /* EDNS0 option (meta-RR) */
+ rk_ns_t_apl = 42, /* Address prefix list (RFC 3123) */
+ rk_ns_t_ds = 43, /* Delegation Signer (RFC 3658) */
+ rk_ns_t_sshfp = 44, /* SSH fingerprint */
+ rk_ns_t_tkey = 249, /* Transaction key */
+ rk_ns_t_tsig = 250, /* Transaction signature. */
+ rk_ns_t_ixfr = 251, /* Incremental zone transfer. */
+ rk_ns_t_axfr = 252, /* Transfer zone of authority. */
+ rk_ns_t_mailb = 253, /* Transfer mailbox records. */
+ rk_ns_t_maila = 254, /* Transfer mail agent records. */
+ rk_ns_t_any = 255, /* Wildcard match. */
+ rk_ns_t_zxfr = 256, /* BIND-specific, nonstandard. */
+ rk_ns_t_max = 65536
+} rk_ns_type;
+
+/* We use these, but they are not always present in <arpa/nameser.h> */
+
+#ifndef C_IN
+#define C_IN 1
+#endif
+
+#ifndef T_A
+#define T_A 1
+#endif
+#ifndef T_NS
+#define T_NS 2
+#endif
+#ifndef T_CNAME
+#define T_CNAME 5
+#endif
+#ifndef T_SOA
+#define T_SOA 5
+#endif
+#ifndef T_PTR
+#define T_PTR 12
+#endif
+#ifndef T_MX
+#define T_MX 15
+#endif
+#ifndef T_TXT
+#define T_TXT 16
+#endif
+#ifndef T_AFSDB
+#define T_AFSDB 18
+#endif
+#ifndef T_SIG
+#define T_SIG 24
+#endif
+#ifndef T_KEY
+#define T_KEY 25
+#endif
+#ifndef T_AAAA
+#define T_AAAA 28
+#endif
+#ifndef T_SRV
+#define T_SRV 33
+#endif
+#ifndef T_NAPTR
+#define T_NAPTR 35
+#endif
+#ifndef T_CERT
+#define T_CERT 37
+#endif
+#ifndef T_SSHFP
+#define T_SSHFP 44
+#endif
+
+#ifndef MAXDNAME
+#define MAXDNAME 1025
+#endif
+
+#define dns_query rk_dns_query
+#define mx_record rk_mx_record
+#define srv_record rk_srv_record
+#define key_record rk_key_record
+#define sig_record rk_sig_record
+#define cert_record rk_cert_record
+#define sshfp_record rk_sshfp_record
+#define resource_record rk_resource_record
+#define dns_reply rk_dns_reply
+
+#define dns_lookup rk_dns_lookup
+#define dns_free_data rk_dns_free_data
+#define dns_string_to_type rk_dns_string_to_type
+#define dns_type_to_string rk_dns_type_to_string
+#define dns_srv_order rk_dns_srv_order
+
+struct dns_query{
+ char *domain;
+ unsigned type;
+ unsigned class;
+};
+
+struct mx_record{
+ unsigned preference;
+ char domain[1];
+};
+
+struct srv_record{
+ unsigned priority;
+ unsigned weight;
+ unsigned port;
+ char target[1];
+};
+
+struct key_record {
+ unsigned flags;
+ unsigned protocol;
+ unsigned algorithm;
+ size_t key_len;
+ u_char key_data[1];
+};
+
+struct sig_record {
+ unsigned type;
+ unsigned algorithm;
+ unsigned labels;
+ unsigned orig_ttl;
+ unsigned sig_expiration;
+ unsigned sig_inception;
+ unsigned key_tag;
+ char *signer;
+ unsigned sig_len;
+ char sig_data[1]; /* also includes signer */
+};
+
+struct cert_record {
+ unsigned type;
+ unsigned tag;
+ unsigned algorithm;
+ size_t cert_len;
+ u_char cert_data[1];
+};
+
+struct sshfp_record {
+ unsigned algorithm;
+ unsigned type;
+ size_t sshfp_len;
+ u_char sshfp_data[1];
+};
+
+struct ds_record {
+ unsigned key_tag;
+ unsigned algorithm;
+ unsigned digest_type;
+ unsigned digest_len;
+ u_char digest_data[1];
+};
+
+struct resource_record{
+ char *domain;
+ unsigned type;
+ unsigned class;
+ unsigned ttl;
+ unsigned size;
+ union {
+ void *data;
+ struct mx_record *mx;
+ struct mx_record *afsdb; /* mx and afsdb are identical */
+ struct srv_record *srv;
+ struct in_addr *a;
+ char *txt;
+ struct key_record *key;
+ struct cert_record *cert;
+ struct sig_record *sig;
+ struct sshfp_record *sshfp;
+ struct ds_record *ds;
+ }u;
+ struct resource_record *next;
+};
+
+#define rk_DNS_MAX_PACKET_SIZE 0xffff
+
+struct dns_header {
+ unsigned id;
+ unsigned flags;
+#define rk_DNS_HEADER_RESPONSE_FLAG 1
+#define rk_DNS_HEADER_AUTHORITIVE_ANSWER 2
+#define rk_DNS_HEADER_TRUNCATED_MESSAGE 4
+#define rk_DNS_HEADER_RECURSION_DESIRED 8
+#define rk_DNS_HEADER_RECURSION_AVAILABLE 16
+#define rk_DNS_HEADER_AUTHENTIC_DATA 32
+#define rk_DNS_HEADER_CHECKING_DISABLED 64
+ unsigned opcode;
+ unsigned response_code;
+ unsigned qdcount;
+ unsigned ancount;
+ unsigned nscount;
+ unsigned arcount;
+};
+
+struct dns_reply{
+ struct dns_header h;
+ struct dns_query q;
+ struct resource_record *head;
+};
+
+
+struct dns_reply* ROKEN_LIB_FUNCTION
+ dns_lookup(const char *, const char *);
+void ROKEN_LIB_FUNCTION
+ dns_free_data(struct dns_reply *);
+int ROKEN_LIB_FUNCTION
+ dns_string_to_type(const char *name);
+const char *ROKEN_LIB_FUNCTION
+ dns_type_to_string(int type);
+void ROKEN_LIB_FUNCTION
+ dns_srv_order(struct dns_reply*);
+
+#endif /* __RESOLVE_H__ */