/* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * 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 project 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 PROJECT 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 PROJECT 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. */ /* * Issues to be discussed: * - Thread safe-ness must be checked * - Return values.  There seems to be no standard for return value (RFC2133) *   but INRIA implementation returns EAI_xxx defined for getaddrinfo(). */ #if 0#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <arpa/nameser.h>#include <netdb.h>#include <resolv.h>#include <string.h>#include <stddef.h> #include "addrinfo.h"#endif #define SUCCESS 0#define YES 1#define NO  0 static struct gni_afd {	int a_af;	int a_addrlen;	int a_socklen;	int a_off;} gni_afdl [] = {#ifdef ENABLE_IPV6	{PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6),		offsetof(struct sockaddr_in6, sin6_addr)},#endif	{PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in),		offsetof(struct sockaddr_in, sin_addr)},	{0, 0, 0},}; struct gni_sockinet {	u_char	si_len;	u_char	si_family;	u_short	si_port;}; #define ENI_NOSOCKET 	0#define ENI_NOSERVNAME	1#define ENI_NOHOSTNAME	2#define ENI_MEMORY	3#define ENI_SYSTEM	4#define ENI_FAMILY	5#define ENI_SALEN	6 /* forward declaration to make gcc happy */int getnameinfo Py_PROTO((const struct sockaddr *, size_t, char *, size_t,			  char *, size_t, int)); intgetnameinfo(sa, salen, host, hostlen, serv, servlen, flags)	const struct sockaddr *sa;	size_t salen;	char *host;	size_t hostlen;	char *serv;	size_t servlen;	int flags;{	struct gni_afd *gni_afd;	struct servent *sp;	struct hostent *hp;	u_short port;	int family, len, i;	char *addr, *p;	u_long v4a;#ifdef ENABLE_IPV6	u_char pfx;#endif	int h_error;	char numserv[512];	char numaddr[512]; 	if (sa == NULL)		return ENI_NOSOCKET; #ifdef HAVE_SOCKADDR_SA_LEN	len = sa->sa_len;	if (len != salen) return ENI_SALEN;#else	len = salen;#endif		family = sa->sa_family;	for (i = 0; gni_afdl[i].a_af; i++)		if (gni_afdl[i].a_af == family) {			gni_afd = &gni_afdl[i];			goto found;		}	return ENI_FAMILY;	 found:	if (len != gni_afd->a_socklen) return ENI_SALEN;		port = ((struct gni_sockinet *)sa)->si_port; /* network byte order */	addr = (char *)sa + gni_afd->a_off; 	if (serv == NULL || servlen == 0) {		/* what we should do? */	} else if (flags & NI_NUMERICSERV) {		sprintf(numserv, "%d", ntohs(port));		if (strlen(numserv) > servlen)			return ENI_MEMORY;		strcpy(serv, numserv);	} else {		sp = getservbyport(port, (flags & NI_DGRAM) ? "udp" : "tcp");		if (sp) {			if (strlen(sp->s_name) > servlen)				return ENI_MEMORY;			strcpy(serv, sp->s_name);		} else			return ENI_NOSERVNAME;	} 	switch (sa->sa_family) {	case AF_INET:		v4a = ((struct sockaddr_in *)sa)->sin_addr.s_addr;		if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))			flags |= NI_NUMERICHOST;		v4a >>= IN_CLASSA_NSHIFT;		if (v4a == 0 || v4a == IN_LOOPBACKNET)			flags |= NI_NUMERICHOST;					break;#ifdef ENABLE_IPV6	case AF_INET6:		pfx = ((struct sockaddr_in6 *)sa)->sin6_addr.s6_addr8[0];		if (pfx == 0 || pfx == 0xfe || pfx == 0xff)			flags |= NI_NUMERICHOST;		break;#endif	}	if (host == NULL || hostlen == 0) {		/* what should we do? */	} else if (flags & NI_NUMERICHOST) {		if (inet_ntop(gni_afd->a_af, addr, numaddr, sizeof(numaddr))		    == NULL)			return ENI_SYSTEM;		if (strlen(numaddr) > hostlen)			return ENI_MEMORY;		strcpy(host, numaddr);	} else {#ifdef ENABLE_IPV6		hp = getipnodebyaddr(addr, gni_afd->a_addrlen, gni_afd->a_af, &h_error);#else		hp = gethostbyaddr(addr, gni_afd->a_addrlen, gni_afd->a_af);		h_error = h_errno;#endif 		if (hp) {			if (flags & NI_NOFQDN) {				p = strchr(hp->h_name, '.');				if (p) *p = '\0';			}			if (strlen(hp->h_name) > hostlen) {#ifdef ENABLE_IPV6				freehostent(hp);#endif				return ENI_MEMORY;			}			strcpy(host, hp->h_name);#ifdef ENABLE_IPV6			freehostent(hp);#endif		} else {			if (flags & NI_NAMEREQD)				return ENI_NOHOSTNAME;			if (inet_ntop(gni_afd->a_af, addr, numaddr, sizeof(numaddr))			    == NULL)				return ENI_NOHOSTNAME;			if (strlen(numaddr) > hostlen)				return ENI_MEMORY;			strcpy(host, numaddr);		}	}	return SUCCESS;}