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+/* $OpenBSD: netdb.h,v 1.33 2015/01/18 20:29:31 deraadt Exp $ */
+
+/*
+ * ++Copyright++ 1980, 1983, 1988, 1993
+ * -
+ * Copyright (c) 1980, 1983, 1988, 1993
+ * The Regents of the University of California. 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 University 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 REGENTS 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 REGENTS 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.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ *
+ * 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, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION 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.
+ * -
+ * --Copyright--
+ */
+
+/*
+ * Copyright (c) 1995, 1996, 1997, 1998, 1999 Craig Metz. 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 author nor the names of any contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+/*
+ * @(#)netdb.h 8.1 (Berkeley) 6/2/93
+ * $From: netdb.h,v 8.7 1996/05/09 05:59:09 vixie Exp $
+ */
+
+#ifndef _NETDB_H_
+#define _NETDB_H_
+
+#include <netinet/in.h>
+
+#ifndef _SOCKLEN_T_DEFINED_
+#define _SOCKLEN_T_DEFINED_
+typedef __socklen_t socklen_t; /* length type for network syscalls */
+#endif
+
+#define _PATH_HEQUIV "/etc/hosts.equiv"
+#define _PATH_HOSTS "/etc/hosts"
+#define _PATH_NETWORKS "/etc/networks"
+#define _PATH_PROTOCOLS "/etc/protocols"
+#define _PATH_SERVICES "/etc/services"
+
+/*
+ * Structures returned by network data base library. All addresses are
+ * supplied in host order, and returned in network order (suitable for
+ * use in system calls).
+ */
+struct hostent {
+ char *h_name; /* official name of host */
+ char **h_aliases; /* alias list */
+ int h_addrtype; /* host address type */
+ int h_length; /* length of address */
+ char **h_addr_list; /* list of addresses from name server */
+#define h_addr h_addr_list[0] /* address, for backward compatibility */
+};
+
+/*
+ * Assumption here is that a network number
+ * fits in an in_addr_t -- probably a poor one.
+ */
+struct netent {
+ char *n_name; /* official name of net */
+ char **n_aliases; /* alias list */
+ int n_addrtype; /* net address type */
+ in_addr_t n_net; /* network # */
+};
+
+struct servent {
+ char *s_name; /* official service name */
+ char **s_aliases; /* alias list */
+ int s_port; /* port # */
+ char *s_proto; /* protocol to use */
+};
+
+struct protoent {
+ char *p_name; /* official protocol name */
+ char **p_aliases; /* alias list */
+ int p_proto; /* protocol # */
+};
+
+#if __BSD_VISIBLE || __POSIX_VISIBLE < 200809
+extern int h_errno;
+
+/*
+ * Error return codes from gethostbyname() and gethostbyaddr()
+ * (left in extern int h_errno).
+ */
+
+#define NETDB_INTERNAL -1 /* see errno */
+#define NETDB_SUCCESS 0 /* no problem */
+#define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */
+#define TRY_AGAIN 2 /* Non-Authoritative Host not found, or SERVERFAIL */
+#define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
+#define NO_DATA 4 /* Valid name, no data record of requested type */
+#define NO_ADDRESS NO_DATA /* no address */
+#endif /* __BSD_VISIBLE || __POSIX_VISIBLE < 200809 */
+
+/* Values for getaddrinfo() and getnameinfo() */
+#define AI_PASSIVE 1 /* socket address is intended for bind() */
+#define AI_CANONNAME 2 /* request for canonical name */
+#define AI_NUMERICHOST 4 /* don't ever try hostname lookup */
+#define AI_EXT 8 /* enable non-portable extensions */
+#define AI_NUMERICSERV 16 /* don't ever try servname lookup */
+#define AI_FQDN 32 /* return the FQDN that was resolved */
+#define AI_ADDRCONFIG 64 /* return configured address families only */
+/* valid flags for addrinfo */
+#define AI_MASK \
+ (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_NUMERICSERV | AI_FQDN | \
+ AI_ADDRCONFIG)
+
+#define NI_NUMERICHOST 1 /* return the host address, not the name */
+#define NI_NUMERICSERV 2 /* return the service address, not the name */
+#define NI_NOFQDN 4 /* return a short name if in the local domain */
+#define NI_NAMEREQD 8 /* fail if either host or service name is unknown */
+#define NI_DGRAM 16 /* look up datagram service instead of stream */
+/* #define NI_NUMERICSCOPE 32 return the scope number, not the name */
+
+#if __BSD_VISIBLE
+#define NI_MAXHOST 256 /* max host name from getnameinfo (MAXHOSTNAMELEN) */
+#define NI_MAXSERV 32 /* max serv. name length returned by getnameinfo */
+
+/*
+ * Scope delimit character (KAME hack)
+ */
+#define SCOPE_DELIMITER '%'
+#endif
+
+#define EAI_BADFLAGS -1 /* invalid value for ai_flags */
+#define EAI_NONAME -2 /* name or service is not known */
+#define EAI_AGAIN -3 /* temporary failure in name resolution */
+#define EAI_FAIL -4 /* non-recoverable failure in name resolution */
+#define EAI_NODATA -5 /* no address associated with name */
+#define EAI_FAMILY -6 /* ai_family not supported */
+#define EAI_SOCKTYPE -7 /* ai_socktype not supported */
+#define EAI_SERVICE -8 /* service not supported for ai_socktype */
+#define EAI_ADDRFAMILY -9 /* address family for name not supported */
+#define EAI_MEMORY -10 /* memory allocation failure */
+#define EAI_SYSTEM -11 /* system error (code indicated in errno) */
+#define EAI_BADHINTS -12 /* invalid value for hints */
+#define EAI_PROTOCOL -13 /* resolved protocol is unknown */
+#define EAI_OVERFLOW -14 /* argument buffer overflow */
+
+struct addrinfo {
+ int ai_flags; /* input flags */
+ int ai_family; /* protocol family for socket */
+ int ai_socktype; /* socket type */
+ int ai_protocol; /* protocol for socket */
+ socklen_t ai_addrlen; /* length of socket-address */
+ struct sockaddr *ai_addr; /* socket-address for socket */
+ char *ai_canonname; /* canonical name for service location (iff req) */
+ struct addrinfo *ai_next; /* pointer to next in list */
+};
+
+#if __BSD_VISIBLE
+/*
+ * Flags for getrrsetbyname()
+ */
+#define RRSET_VALIDATED 1
+
+/*
+ * Return codes for getrrsetbyname()
+ */
+#define ERRSET_SUCCESS 0
+#define ERRSET_NOMEMORY 1
+#define ERRSET_FAIL 2
+#define ERRSET_INVAL 3
+#define ERRSET_NONAME 4
+#define ERRSET_NODATA 5
+
+/*
+ * Structures used by getrrsetbyname() and freerrset()
+ */
+struct rdatainfo {
+ unsigned int rdi_length; /* length of data */
+ unsigned char *rdi_data; /* record data */
+};
+
+struct rrsetinfo {
+ unsigned int rri_flags; /* RRSET_VALIDATED ... */
+ unsigned int rri_rdclass; /* class number */
+ unsigned int rri_rdtype; /* RR type number */
+ unsigned int rri_ttl; /* time to live */
+ unsigned int rri_nrdatas; /* size of rdatas array */
+ unsigned int rri_nsigs; /* size of sigs array */
+ char *rri_name; /* canonical name */
+ struct rdatainfo *rri_rdatas; /* individual records */
+ struct rdatainfo *rri_sigs; /* individual signatures */
+};
+
+struct servent_data {
+ void *fp;
+ char **aliases;
+ int maxaliases;
+ int stayopen;
+ char *line;
+};
+
+struct protoent_data {
+ void *fp;
+ char **aliases;
+ int maxaliases;
+ int stayopen;
+ char *line;
+};
+#endif
+
+__BEGIN_DECLS
+void endhostent(void);
+void endnetent(void);
+void endprotoent(void);
+void endservent(void);
+#if __BSD_VISIBLE || __POSIX_VISIBLE < 200809
+struct hostent *gethostbyaddr(const void *, socklen_t, int);
+struct hostent *gethostbyname(const char *);
+#endif
+#if __BSD_VISIBLE
+struct hostent *gethostbyname2(const char *, int);
+#endif
+struct hostent *gethostent(void);
+struct netent *getnetbyaddr(in_addr_t, int);
+struct netent *getnetbyname(const char *);
+struct netent *getnetent(void);
+struct protoent *getprotobyname(const char *);
+struct protoent *getprotobynumber(int);
+struct protoent *getprotoent(void);
+struct servent *getservbyname(const char *, const char *);
+struct servent *getservbyport(int, const char *);
+struct servent *getservent(void);
+#if __BSD_VISIBLE
+void herror(const char *);
+const char *hstrerror(int);
+#endif
+void sethostent(int);
+/* void sethostfile(const char *); */
+void setnetent(int);
+void setprotoent(int);
+void setservent(int);
+
+#if __BSD_VISIBLE
+void endprotoent_r(struct protoent_data *);
+void endservent_r(struct servent_data *);
+int getprotobyname_r(const char *, struct protoent *,
+ struct protoent_data *);
+int getprotobynumber_r(int, struct protoent *,
+ struct protoent_data *);
+int getservbyname_r(const char *, const char *, struct servent *,
+ struct servent_data *);
+int getservbyport_r(int, const char *, struct servent *,
+ struct servent_data *);
+int getservent_r(struct servent *, struct servent_data *);
+int getprotoent_r(struct protoent *, struct protoent_data *);
+void setprotoent_r(int, struct protoent_data *);
+void setservent_r(int, struct servent_data *);
+#endif
+
+int getaddrinfo(const char *, const char *,
+ const struct addrinfo *, struct addrinfo **);
+void freeaddrinfo(struct addrinfo *);
+int getnameinfo(const struct sockaddr *, socklen_t,
+ char *, size_t, char *, size_t, int);
+const char *gai_strerror(int);
+
+#if __BSD_VISIBLE
+int getrrsetbyname(const char *, unsigned int, unsigned int, unsigned int, struct rrsetinfo **);
+void freerrset(struct rrsetinfo *);
+#endif
+__END_DECLS
+
+#endif /* !_NETDB_H_ */