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Commit	Line	Data
	1	// -- mode: cpp; mode: fold --
	2	// Description /{{{/
	3	// $Id: rfc2553emu.h,v 1.4 2000/06/18 06:04:45 jgg Exp $
	4	/* ######################################################################
	5
	6	RFC 2553 Emulation - Provides emulation for RFC 2553 getaddrinfo,
	7	freeaddrinfo and getnameinfo
	8
	9	These functions are necessary to write portable protocol independent
	10	networking. They transparently support IPv4, IPv6 and probably many
	11	other protocols too. This implementation is needed when the host does
	12	not support these standards. It implements a simple wrapper that
	13	basically supports only IPv4.
	14
	15	Perfect emulation is not provided, but it is passable..
	16
	17	Originally written by Jason Gunthorpe <jgg@debian.org> and placed into
	18	the Public Domain, do with it what you will.
	19
	20	##################################################################### */
	21	/}}}/
	22	#ifndef RFC2553EMU_H
	23	#define RFC2553EMU_H
	24
	25	#include <netdb.h>
	26	#include <sys/types.h>
	27	#include <sys/socket.h>
	28
	29	// Autosense getaddrinfo
	30	#if defined(AI_PASSIVE) && defined(EAI_NONAME)
	31	#define HAVE_GETADDRINFO
	32	#endif
	33
	34	// Autosense getnameinfo
	35	#if defined(NI_NUMERICHOST)
	36	#define HAVE_GETNAMEINFO
	37	#endif
	38
	39	// getaddrinfo support?
	40	#ifndef HAVE_GETADDRINFO
	41	// Renamed to advoid type clashing.. (for debugging)
	42	struct addrinfo_emu
	43	{
	44	int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */
	45	int ai_family; /* PF_xxx */
	46	int ai_socktype; /* SOCK_xxx */
	47	int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
	48	size_t ai_addrlen; /* length of ai_addr */
	49	char ai_canonname; / canonical name for nodename */
	50	struct sockaddr ai_addr; / binary address */
	51	struct addrinfo_emu ai_next; / next structure in linked list */
	52	};
	53	#define addrinfo addrinfo_emu
	54
	55	int getaddrinfo(const char nodename, const char servname,
	56	const struct addrinfo *hints,
	57	struct addrinfo **res);
	58	void freeaddrinfo(struct addrinfo *ai);
	59
	60	#ifndef AI_PASSIVE
	61	#define AI_PASSIVE (1<<1)
	62	#endif
	63
	64	#ifndef EAI_NONAME
	65	#define EAI_NONAME -1
	66	#define EAI_AGAIN -2
	67	#define EAI_FAIL -3
	68	#define EAI_NODATA -4
	69	#define EAI_FAMILY -5
	70	#define EAI_SOCKTYPE -6
	71	#define EAI_SERVICE -7
	72	#define EAI_ADDRFAMILY -8
	73	#define EAI_SYSTEM -10
	74	#define EAI_MEMORY -11
	75	#endif
	76
	77	/* If we don't have getaddrinfo then we probably don't have
	78	sockaddr_storage either (same RFC) so we definitely will not be
	79	doing any IPv6 stuff. Do not use the members of this structure to
	80	retain portability, cast to a sockaddr. */
	81	#define sockaddr_storage sockaddr_in
	82	#endif
	83
	84	// getnameinfo support (glibc2.0 has getaddrinfo only)
	85	#ifndef HAVE_GETNAMEINFO
	86
	87	int getnameinfo(const struct sockaddr *sa, socklen_t salen,
	88	char *host, size_t hostlen,
	89	char *serv, size_t servlen,
	90	int flags);
	91
	92	#ifndef NI_MAXHOST
	93	#define NI_MAXHOST 1025
	94	#define NI_MAXSERV 32
	95	#endif
	96
	97	#ifndef NI_NUMERICHOST
	98	#define NI_NUMERICHOST (1<<0)
	99	#define NI_NUMERICSERV (1<<1)
	100	// #define NI_NOFQDN (1<<2)
	101	#define NI_NAMEREQD (1<<3)
	102	#define NI_DATAGRAM (1<<4)
	103	#endif
	104
	105	#define sockaddr_storage sockaddr_in
	106	#endif
	107
	108	// Glibc 2.0.7 misses this one
	109	#ifndef AI_NUMERICHOST
	110	#define AI_NUMERICHOST 0
	111	#endif
	112
	113	#endif