1/* 2 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30/** 31 * @file addrinfo.h 32 * 33 * Replacement getaddrinfo() for machines that don't have it. The new 34 * getaddrinfo()/getnameinfo() interface is implemented on top of the 35 * traditional resolver calls. 36 **/ 37 38#ifndef HAVE_GETADDRINFO 39 40#ifndef EAI_ADDRFAMILY 41/* 42 * Error return codes from getaddrinfo() 43 */ 44#define EAI_ADDRFAMILY 1 /* address family for hostname not supported */ 45#define EAI_AGAIN 2 /* temporary failure in name resolution */ 46#define EAI_BADFLAGS 3 /* invalid value for ai_flags */ 47#define EAI_FAIL 4 /* non-recoverable failure in name resolution */ 48#define EAI_FAMILY 5 /* ai_family not supported */ 49#define EAI_MEMORY 6 /* memory allocation failure */ 50#define EAI_NODATA 7 /* no address associated with hostname */ 51#define EAI_NONAME 8 /* hostname nor servname provided, or not known */ 52#define EAI_SERVICE 9 /* servname not supported for ai_socktype */ 53#define EAI_SOCKTYPE 10 /* ai_socktype not supported */ 54#define EAI_SYSTEM 11 /* system error returned in errno */ 55#define EAI_BADHINTS 12 56#define EAI_PROTOCOL 13 57#define EAI_MAX 14 58#endif /* ndef EAI_ADDRFAMILY */ 59 60/* 61 * Flag values for getaddrinfo() 62 */ 63 64#ifndef AI_PASSIVE 65 66#define AI_PASSIVE 0x00000001 /* get address to use bind() */ 67#define AI_CANONNAME 0x00000002 /* fill ai_canonname */ 68#define AI_NUMERICHOST 0x00000004 /* prevent name resolution */ 69/* valid flags for addrinfo */ 70#define AI_MASK (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST) 71 72#define AI_ALL 0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */ 73#define AI_V4MAPPED_CFG 0x00000200 /* accept IPv4-mapped if kernel supports */ 74#define AI_ADDRCONFIG 0x00000400 /* only if any address is assigned */ 75#define AI_V4MAPPED 0x00000800 /* accept IPv4-mapped IPv6 address */ 76/* special recommended flags for getipnodebyname */ 77#define AI_DEFAULT (AI_V4MAPPED_CFG | AI_ADDRCONFIG) 78 79/* 80 * Constants for getnameinfo() 81 */ 82#define NI_MAXHOST 1025 83#define NI_MAXSERV 32 84 85/* 86 * Flag values for getnameinfo() 87 */ 88#define NI_NOFQDN 0x00000001 89#define NI_NUMERICHOST 0x00000002 90#define NI_NAMEREQD 0x00000004 91#define NI_NUMERICSERV 0x00000008 92#define NI_DGRAM 0x00000010 93 94struct addrinfo { 95 int ai_flags; /* AI_PASSIVE, AI_CANONNAME */ 96 int ai_family; /* PF_xxx */ 97 int ai_socktype; /* SOCK_xxx */ 98 int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */ 99 size_t ai_addrlen; /* length of ai_addr */ 100 char *ai_canonname; /* canonical name for hostname */ 101 struct sockaddr *ai_addr; /* binary address */ 102 struct addrinfo *ai_next; /* next structure in linked list */ 103}; 104 105extern void freehostent(struct hostent *); 106extern char *gai_strerror(int); 107#endif /* AI_PASSIVE */ 108#endif /* HAVE_GETADDRINFO */ 109 110#ifndef HAVE_SOCKADDR_STORAGE 111struct sockaddr_storage { 112 unsigned long align; 113 unsigned char fill[128 - sizeof (unsigned long)]; 114}; 115#endif 116