Imported Upstream version 1.4.8
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352 changed files with 42813 additions and 27251 deletions
417
gl/getaddrinfo.c
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417
gl/getaddrinfo.c
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/* Get address information (partial implementation).
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Copyright (C) 1997, 2001, 2002, 2004, 2005, 2006 Free Software
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Foundation, Inc.
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Contributed by Simon Josefsson <simon@josefsson.org>.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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#include <config.h>
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#include "getaddrinfo.h"
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#if HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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/* Get calloc. */
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#include <stdlib.h>
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/* Get memcpy. */
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#include <string.h>
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#include <stdbool.h>
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#include "gettext.h"
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#define _(String) gettext (String)
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#define N_(String) String
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#include "inet_ntop.h"
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#include "snprintf.h"
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#include "strdup.h"
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/* BeOS has AF_INET, but not PF_INET. */
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#ifndef PF_INET
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# define PF_INET AF_INET
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#endif
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/* BeOS also lacks PF_UNSPEC. */
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#ifndef PF_UNSPEC
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# define PF_UNSPEC 0
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#endif
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#if defined _WIN32 || defined __WIN32__
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# define WIN32_NATIVE
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#endif
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#ifdef WIN32_NATIVE
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typedef int (WSAAPI *getaddrinfo_func) (const char*, const char*,
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const struct addrinfo*,
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struct addrinfo**);
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typedef void (WSAAPI *freeaddrinfo_func) (struct addrinfo*);
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typedef int (WSAAPI *getnameinfo_func) (const struct sockaddr*,
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socklen_t, char*, DWORD,
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char*, DWORD, int);
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static getaddrinfo_func getaddrinfo_ptr = NULL;
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static freeaddrinfo_func freeaddrinfo_ptr = NULL;
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static getnameinfo_func getnameinfo_ptr = NULL;
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static int
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use_win32_p (void)
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{
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static int done = 0;
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HMODULE h;
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if (done)
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return getaddrinfo_ptr ? 1 : 0;
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done = 1;
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h = GetModuleHandle ("ws2_32.dll");
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if (h)
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{
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getaddrinfo_ptr = (getaddrinfo_func) GetProcAddress (h, "getaddrinfo");
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freeaddrinfo_ptr = (freeaddrinfo_func) GetProcAddress (h, "freeaddrinfo");
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getnameinfo_ptr = (getnameinfo_func) GetProcAddress (h, "getnameinfo");
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}
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/* If either is missing, something is odd. */
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if (!getaddrinfo_ptr || !freeaddrinfo_ptr || !getnameinfo_ptr)
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{
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getaddrinfo_ptr = NULL;
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freeaddrinfo_ptr = NULL;
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getnameinfo_ptr = NULL;
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return 0;
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}
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return 1;
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}
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#endif
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static inline bool
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validate_family (int family)
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{
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/* FIXME: Support more families. */
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#if HAVE_IPV4
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if (family == PF_INET)
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return true;
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#endif
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#if HAVE_IPV6
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if (family == PF_INET6)
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return true;
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#endif
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if (family == PF_UNSPEC)
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return true;
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return false;
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}
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/* Translate name of a service location and/or a service name to set of
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socket addresses. */
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int
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getaddrinfo (const char *restrict nodename,
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const char *restrict servname,
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const struct addrinfo *restrict hints,
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struct addrinfo **restrict res)
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{
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struct addrinfo *tmp;
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int port = 0;
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struct hostent *he;
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void *storage;
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size_t size;
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#if HAVE_IPV6
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struct v6_pair {
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struct addrinfo addrinfo;
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struct sockaddr_in6 sockaddr_in6;
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};
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#endif
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#if HAVE_IPV4
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struct v4_pair {
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struct addrinfo addrinfo;
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struct sockaddr_in sockaddr_in;
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};
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#endif
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#ifdef WIN32_NATIVE
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if (use_win32_p ())
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return getaddrinfo_ptr (nodename, servname, hints, res);
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#endif
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if (hints && (hints->ai_flags & ~(AI_CANONNAME|AI_PASSIVE)))
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/* FIXME: Support more flags. */
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return EAI_BADFLAGS;
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if (hints && !validate_family (hints->ai_family))
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return EAI_FAMILY;
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if (hints &&
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hints->ai_socktype != SOCK_STREAM && hints->ai_socktype != SOCK_DGRAM)
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/* FIXME: Support other socktype. */
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return EAI_SOCKTYPE; /* FIXME: Better return code? */
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if (!nodename)
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{
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if (!(hints->ai_flags & AI_PASSIVE))
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return EAI_NONAME;
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#ifdef HAVE_IPV6
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nodename = (hints->ai_family == AF_INET6) ? "::" : "0.0.0.0";
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#else
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nodename = "0.0.0.0";
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#endif
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}
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if (servname)
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{
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struct servent *se = NULL;
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const char *proto =
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(hints && hints->ai_socktype == SOCK_DGRAM) ? "udp" : "tcp";
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if (!(hints->ai_flags & AI_NUMERICSERV))
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/* FIXME: Use getservbyname_r if available. */
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se = getservbyname (servname, proto);
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if (!se)
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{
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char *c;
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if (!(*servname >= '0' && *servname <= '9'))
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return EAI_NONAME;
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port = strtoul (servname, &c, 10);
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if (*c || port > 0xffff)
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return EAI_NONAME;
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port = htons (port);
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}
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else
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port = se->s_port;
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}
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/* FIXME: Use gethostbyname_r if available. */
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he = gethostbyname (nodename);
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if (!he || he->h_addr_list[0] == NULL)
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return EAI_NONAME;
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switch (he->h_addrtype)
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{
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#if HAVE_IPV6
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case PF_INET6:
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size = sizeof (struct v6_pair);
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break;
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#endif
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#if HAVE_IPV4
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case PF_INET:
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size = sizeof (struct v4_pair);
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break;
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#endif
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default:
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return EAI_NODATA;
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}
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storage = calloc (1, size);
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if (!storage)
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return EAI_MEMORY;
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switch (he->h_addrtype)
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{
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#if HAVE_IPV6
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case PF_INET6:
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{
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struct v6_pair *p = storage;
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struct sockaddr_in6 *sinp = &p->sockaddr_in6;
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tmp = &p->addrinfo;
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if (port)
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sinp->sin6_port = port;
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if (he->h_length != sizeof (sinp->sin6_addr))
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{
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free (storage);
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return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
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}
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memcpy (&sinp->sin6_addr, he->h_addr_list[0], sizeof sinp->sin6_addr);
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tmp->ai_addr = (struct sockaddr *) sinp;
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tmp->ai_addrlen = sizeof *sinp;
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}
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break;
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#endif
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#if HAVE_IPV4
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case PF_INET:
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{
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struct v4_pair *p = storage;
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struct sockaddr_in *sinp = &p->sockaddr_in;
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tmp = &p->addrinfo;
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if (port)
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sinp->sin_port = port;
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if (he->h_length != sizeof (sinp->sin_addr))
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{
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free (storage);
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return EAI_SYSTEM; /* FIXME: Better return code? Set errno? */
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}
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memcpy (&sinp->sin_addr, he->h_addr_list[0], sizeof sinp->sin_addr);
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tmp->ai_addr = (struct sockaddr *) sinp;
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tmp->ai_addrlen = sizeof *sinp;
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}
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break;
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#endif
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default:
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free (storage);
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return EAI_NODATA;
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}
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if (hints && hints->ai_flags & AI_CANONNAME)
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{
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const char *cn;
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if (he->h_name)
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cn = he->h_name;
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else
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cn = nodename;
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tmp->ai_canonname = strdup (cn);
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if (!tmp->ai_canonname)
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{
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free (storage);
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return EAI_MEMORY;
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}
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}
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tmp->ai_protocol = (hints) ? hints->ai_protocol : 0;
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tmp->ai_socktype = (hints) ? hints->ai_socktype : 0;
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tmp->ai_addr->sa_family = he->h_addrtype;
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tmp->ai_family = he->h_addrtype;
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/* FIXME: If more than one address, create linked list of addrinfo's. */
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*res = tmp;
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return 0;
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}
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/* Free `addrinfo' structure AI including associated storage. */
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void
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freeaddrinfo (struct addrinfo *ai)
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{
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#ifdef WIN32_NATIVE
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if (use_win32_p ())
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{
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freeaddrinfo_ptr (ai);
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return;
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}
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#endif
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while (ai)
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{
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struct addrinfo *cur;
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cur = ai;
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ai = ai->ai_next;
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if (cur->ai_canonname) free (cur->ai_canonname);
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free (cur);
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}
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}
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int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
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char *restrict node, socklen_t nodelen,
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char *restrict service, socklen_t servicelen,
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int flags)
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{
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#ifdef WIN32_NATIVE
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if (use_win32_p ())
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return getnameinfo_ptr (sa, salen, node, nodelen,
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service, servicelen, flags);
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#endif
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/* FIXME: Support other flags. */
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if ((node && nodelen > 0 && !(flags & NI_NUMERICHOST)) ||
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(service && servicelen > 0 && !(flags & NI_NUMERICHOST)) ||
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(flags & ~(NI_NUMERICHOST|NI_NUMERICSERV)))
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return EAI_BADFLAGS;
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if (sa == NULL || salen < sizeof (sa->sa_family))
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return EAI_FAMILY;
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switch (sa->sa_family)
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{
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#if HAVE_IPV4
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case AF_INET:
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if (salen < sizeof (struct sockaddr_in))
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return EAI_FAMILY;
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break;
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#endif
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#if HAVE_IPV6
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case AF_INET6:
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if (salen < sizeof (struct sockaddr_in6))
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return EAI_FAMILY;
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break;
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#endif
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default:
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return EAI_FAMILY;
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}
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if (node && nodelen > 0 && flags & NI_NUMERICHOST)
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{
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switch (sa->sa_family)
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{
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#if HAVE_IPV4
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case AF_INET:
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if (!inet_ntop (AF_INET,
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&(((const struct sockaddr_in *) sa)->sin_addr),
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node, nodelen))
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return EAI_SYSTEM;
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break;
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#endif
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#if HAVE_IPV6
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case AF_INET6:
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if (!inet_ntop (AF_INET6,
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&(((const struct sockaddr_in6 *) sa)->sin6_addr),
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node, nodelen))
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return EAI_SYSTEM;
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break;
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#endif
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default:
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return EAI_FAMILY;
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}
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}
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if (service && servicelen > 0 && flags & NI_NUMERICSERV)
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switch (sa->sa_family)
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{
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#if HAVE_IPV4
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case AF_INET:
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#endif
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#if HAVE_IPV6
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case AF_INET6:
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#endif
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{
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unsigned short int port
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= ntohs (((const struct sockaddr_in *) sa)->sin_port);
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if (servicelen <= snprintf (service, servicelen, "%u", port))
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return EAI_OVERFLOW;
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}
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break;
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}
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return 0;
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}
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