| /* |
| * 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(const struct sockaddr *, size_t, char *, size_t, |
| char *, size_t, int); |
| |
| int |
| getnameinfo(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_addr[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; |
| } |