diff options
Diffstat (limited to 'inet/getipnodebynm.c')
| -rw-r--r-- | inet/getipnodebynm.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/inet/getipnodebynm.c b/inet/getipnodebynm.c deleted file mode 100644 index b0be882afb..0000000000 --- a/inet/getipnodebynm.c +++ /dev/null @@ -1,194 +0,0 @@ -/* Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <assert.h> -#include <ctype.h> -#include <errno.h> -#include <netdb.h> -#include <stdlib.h> -#include <string.h> -#include <arpa/inet.h> - -#include "nsswitch.h" - - -/* We avoid using a too large buffer in case the user is accumulating the - results and there is lots of unused space in the allocated buffer. */ -#define BUFLEN 512 - - -/* Internal function to test whether IPv4 and/or IPv6 are available. */ -extern void __protocol_available (int *have_inet, int *have_inet6) - internal_function; - - -/* Type of the lookup function we need here. */ -typedef enum nss_status (*lookup_function) (const char *, int, int, - struct hostent *, char *, - size_t, int *, int *); - -/* The lookup function for the first entry of this service. */ -extern int __nss_hosts_lookup (service_user **nip, const char *name, - void **fctp); - - -struct hostent * -getipnodebyname (const char *name, int type, int flags, int *h_errnop) -{ - static service_user *startp; - static lookup_function start_fct; - service_user *nip; - lookup_function fct; - int no_more; - size_t buffer_size; - char *buffer; - struct hostent *result; - int save; - int have_inet = 1; - int have_inet6 = 1; - - /* First determine whether we have the appropriate interfaces. - XXX I don't think we can cache the result since the system - can be reconfigured. */ - if ((flags & AI_ADDRCONFIG) != 0) - __protocol_available (&have_inet, &have_inet6); - - /* Handle impossible requests first. */ - if ((type == AF_INET && have_inet == 0) - || (type == AF_INET6 && have_inet6 == 0 && ((flags & AI_V4MAPPED) == 0 - || have_inet == 0)) - || (type != AF_INET && type != AF_INET6)) - { - *h_errnop = NO_DATA; - return NULL; - } - - buffer_size = BUFLEN; - buffer = (char *) malloc (buffer_size); - - result = NULL; - if (buffer != NULL) - { -#define HAVE_TYPE -#define resbuf (*((struct hostent *) buffer)) -#include "../nss/digits_dots.c" - } - - if (startp == NULL) - { - no_more = __nss_hosts_lookup (&nip, "getipnodebyname_r", (void **) &fct); - if (no_more) - startp = (service_user *) -1l; - else - { - startp = nip; - start_fct = fct; - } - } - else - { - fct = start_fct; - no_more = (nip = startp) == (service_user *) -1l; - } - - /* First do a lookup with the original protocol type. */ - while (no_more == 0 && buffer != NULL) - { - enum nss_status status; - - status = DL_CALL_FCT (fct, (name, type, - ((flags & AI_ALL) - ? flags : (flags & ~AI_V4MAPPED)), - (struct hostent *) buffer, - (char *) ((struct hostent *) buffer + 1), - buffer_size - sizeof (struct hostent), - &errno, h_errnop)); - - if (status == NSS_STATUS_SUCCESS) - { - result = (struct hostent *) buffer; - break; - } - - if (status == NSS_STATUS_TRYAGAIN && *h_errnop == NETDB_INTERNAL - && errno == ERANGE) - { - /* Resize the buffer, it's too small. */ - buffer_size += BUFLEN; - buffer = (char *) realloc (buffer, buffer_size); - continue; - } - - no_more = __nss_next (&nip, "getipnodebyname_r", - (void **) &fct, status, 0); - } - - /* If we are looking for an IPv6 address but haven't found any and - do not have the AI_ALL but the AI_V4MAPPED flag set, now try - looking up an IPv4 address and map it. */ - if (buffer != NULL && result == NULL - && type == AF_INET6 && (flags & AI_V4MAPPED) != 0 - && (no_more = (nip = startp) == (service_user *) -1l) == 0) - { - /* We have to use a new buffer if there is already a result. */ - fct = start_fct; - - do - { - enum nss_status status; - - status = DL_CALL_FCT (fct, (name, type, flags, - (struct hostent *) buffer, - (char *) ((struct hostent *) buffer + 1), - buffer_size - sizeof (struct hostent), - &errno, h_errnop)); - - if (status == NSS_STATUS_SUCCESS) - { - result = (struct hostent *) buffer; - break; - } - - if (status == NSS_STATUS_TRYAGAIN && *h_errnop == NETDB_INTERNAL - && errno == ERANGE) - { - /* Resize the buffer, it's too small. */ - buffer_size += BUFLEN; - buffer = (char *) realloc (buffer, buffer_size); - continue; - } - - no_more = __nss_next (&nip, "getipnodebyname_r", - (void **) &fct, status, 0); - } - while (no_more == 0 && buffer != NULL); - } - - done: - if (buffer == NULL) - { - /* We are out of memory. */ - *h_errnop = TRY_AGAIN; - assert (result == NULL); - } - else if (result == NULL && buffer != NULL) - free (buffer); - - return result; -} |