1/* 2 * Copyright (C) 1995, 1996, 1997, and 1998 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 * Issues to be discussed: 32 * - Thread safe-ness must be checked 33 * - Return values. There seems to be no standard for return value (RFC2133) 34 * but INRIA implementation returns EAI_xxx defined for getaddrinfo(). 35 */ 36 37#if 0 38#include <sys/types.h> 39#include <sys/socket.h> 40#include <netinet/in.h> 41#include <arpa/inet.h> 42#include <arpa/nameser.h> 43#include <netdb.h> 44#include <resolv.h> 45#include <string.h> 46#include <stddef.h> 47 48#include "addrinfo.h" 49#endif 50 51#ifdef HAVE_NETDB_H 52#define HAVE_GETNAMEINFO 1 53 54#define SUCCESS 0 55#define YES 1 56#define NO 0 57 58static struct gni_afd { 59 int a_af; 60 int a_addrlen; 61 int a_socklen; 62 int a_off; 63} gni_afdl [] = { 64#ifdef ENABLE_IPV6 65 {PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6), 66 offsetof(struct sockaddr_in6, sin6_addr)}, 67#endif 68 {PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in), 69 offsetof(struct sockaddr_in, sin_addr)}, 70 {0, 0, 0}, 71}; 72 73struct gni_sockinet { 74 u_char si_len; 75 u_char si_family; 76 u_short si_port; 77}; 78 79#define ENI_NOSOCKET 0 80#define ENI_NOSERVNAME 1 81#define ENI_NOHOSTNAME 2 82#define ENI_MEMORY 3 83#define ENI_SYSTEM 4 84#define ENI_FAMILY 5 85#define ENI_SALEN 6 86 87/* forward declaration to make gcc happy */ 88int getnameinfo(const struct sockaddr *, size_t, char *, size_t, 89 char *, size_t, int); 90 91int 92getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) 93 const struct sockaddr *sa; 94 size_t salen; 95 char *host; 96 size_t hostlen; 97 char *serv; 98 size_t servlen; 99 int flags; 100{ 101 struct gni_afd *gni_afd; 102 struct servent *sp; 103 struct hostent *hp; 104 u_short port; 105 int family, len, i; 106 char *addr, *p; 107 u_long v4a; 108#ifdef ENABLE_IPV6 109 u_char pfx; 110 int h_error; 111#endif 112 char numserv[512]; 113 char numaddr[512]; 114 115 if (sa == NULL) 116 return ENI_NOSOCKET; 117 118#ifdef HAVE_SOCKADDR_SA_LEN 119 len = sa->sa_len; 120 if (len != salen) return ENI_SALEN; 121#else 122 len = salen; 123#endif 124 125 family = sa->sa_family; 126 for (i = 0; gni_afdl[i].a_af; i++) 127 if (gni_afdl[i].a_af == family) { 128 gni_afd = &gni_afdl[i]; 129 goto found; 130 } 131 return ENI_FAMILY; 132 133 found: 134 if (len != gni_afd->a_socklen) return ENI_SALEN; 135 136 port = ((struct gni_sockinet *)sa)->si_port; /* network byte order */ 137 addr = (char *)sa + gni_afd->a_off; 138 139 if (serv == NULL || servlen == 0) { 140 /* what we should do? */ 141 } else if (flags & NI_NUMERICSERV) { 142 sprintf(numserv, "%d", ntohs(port)); 143 if (strlen(numserv) > servlen) 144 return ENI_MEMORY; 145 strcpy(serv, numserv); 146 } else { 147 sp = getservbyport(port, (flags & NI_DGRAM) ? "udp" : "tcp"); 148 if (sp) { 149 if (strlen(sp->s_name) > servlen) 150 return ENI_MEMORY; 151 strcpy(serv, sp->s_name); 152 } else 153 return ENI_NOSERVNAME; 154 } 155 156 switch (sa->sa_family) { 157 case AF_INET: 158 v4a = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 159 if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a)) 160 flags |= NI_NUMERICHOST; 161 v4a >>= IN_CLASSA_NSHIFT; 162 if (v4a == 0 || v4a == IN_LOOPBACKNET) 163 flags |= NI_NUMERICHOST; 164 break; 165#ifdef ENABLE_IPV6 166 case AF_INET6: 167 pfx = ((struct sockaddr_in6 *)sa)->sin6_addr.s6_addr[0]; 168 if (pfx == 0 || pfx == 0xfe || pfx == 0xff) 169 flags |= NI_NUMERICHOST; 170 break; 171#endif 172 } 173 if (host == NULL || hostlen == 0) { 174 /* what should we do? */ 175 } else if (flags & NI_NUMERICHOST) { 176 if (inet_ntop(gni_afd->a_af, addr, numaddr, sizeof(numaddr)) 177 == NULL) 178 return ENI_SYSTEM; 179 if (strlen(numaddr) > hostlen) 180 return ENI_MEMORY; 181 strcpy(host, numaddr); 182 } else { 183#ifdef ENABLE_IPV6 184 hp = getipnodebyaddr(addr, gni_afd->a_addrlen, gni_afd->a_af, &h_error); 185#else 186 hp = gethostbyaddr(addr, gni_afd->a_addrlen, gni_afd->a_af); 187#endif 188 189 if (hp) { 190 if (flags & NI_NOFQDN) { 191 p = strchr(hp->h_name, '.'); 192 if (p) *p = '\0'; 193 } 194 if (strlen(hp->h_name) > hostlen) { 195#ifdef ENABLE_IPV6 196 freehostent(hp); 197#endif 198 return ENI_MEMORY; 199 } 200 strcpy(host, hp->h_name); 201#ifdef ENABLE_IPV6 202 freehostent(hp); 203#endif 204 } else { 205 if (flags & NI_NAMEREQD) 206 return ENI_NOHOSTNAME; 207 if (inet_ntop(gni_afd->a_af, addr, numaddr, sizeof(numaddr)) 208 == NULL) 209 return ENI_NOHOSTNAME; 210 if (strlen(numaddr) > hostlen) 211 return ENI_MEMORY; 212 strcpy(host, numaddr); 213 } 214 } 215 return SUCCESS; 216} 217#endif // HAVE_NETDB_H 218