/* * Mar 8, 2000 by Hajimu UMEMOTO <ume@mahoroba.org> * $Id: getnameinfo.c,v 1.5 2005/03/05 00:37:13 dasenbro Exp $ * * This module is besed on ssh-1.2.27-IPv6-1.5 written by * KIKUCHI Takahiro <kick@kyoto.wide.ad.jp> */ /* * Copyright (c) 1998-2003 Carnegie Mellon University. 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. The name "Carnegie Mellon University" must not be used to * endorse or promote products derived from this software without * prior written permission. For permission or any other legal * details, please contact * Office of Technology Transfer * Carnegie Mellon University * 5000 Forbes Avenue * Pittsburgh, PA 15213-3890 * (412) 268-4387, fax: (412) 268-7395 * tech-transfer@andrew.cmu.edu * * 4. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by Computing Services * at Carnegie Mellon University (http://www.cmu.edu/computing/)." * * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE * FOR ANY SPECIAL, 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. */ /* * fake library for ssh * * This file includes getnameinfo(). * These funtions are defined in rfc2133. * * But these functions are not implemented correctly. The minimum subset * is implemented for ssh use only. For exapmle, this routine assumes * that ai_family is AF_INET. Don't use it for another purpose. * * In the case not using 'configure --enable-ipv6', this getnameinfo.c * will be used if you have broken getnameinfo or no getnameinfo. */ #include "config.h" #include <arpa/inet.h> #include <stdio.h> #include <string.h> int getnameinfo(const struct sockaddr *sa, socklen_t salen __attribute__((unused)), char *host, size_t hostlen, char *serv, size_t servlen, int flags) { struct sockaddr_in *sin = (struct sockaddr_in *)sa; struct hostent *hp; char tmpserv[16]; if (serv) { snprintf(tmpserv, sizeof(tmpserv), "%d", ntohs(sin->sin_port)); if (strlen(tmpserv) > servlen) return EAI_MEMORY; else strcpy(serv, tmpserv); } if (host) { if (flags & NI_NUMERICHOST) { if (flags & NI_NAMEREQD) return EAI_NONAME; if (strlen(inet_ntoa(sin->sin_addr)) >= hostlen) return EAI_MEMORY; else { strcpy(host, inet_ntoa(sin->sin_addr)); return 0; } } else { hp = gethostbyaddr((char *)&sin->sin_addr, sizeof(struct in_addr), AF_INET); if (hp) if (strlen(hp->h_name) >= hostlen) return EAI_MEMORY; else { strcpy(host, hp->h_name); return 0; } else if (flags & NI_NAMEREQD) return EAI_NONAME; else if (strlen(inet_ntoa(sin->sin_addr)) >= hostlen) return EAI_MEMORY; else { strcpy(host, inet_ntoa(sin->sin_addr)); return 0; } } } return 0; }