76 lines
2.9 KiB
C
76 lines
2.9 KiB
C
/****************************************************************************
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* libs/libc/netdb/lib_gethostbyname2.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <netdb.h>
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#include "netdb/lib_netdb.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: gethostbyname2
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*
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* Description:
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* The gethostbyname2() function returns a structure of type hostent for
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* the given host name. Here name is either a hostname, or an IPv4 address
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* in standard dot notation (as for inet_addr(3)), or an IPv6 address in
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* colon (and possibly dot) notation.
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*
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* If name is an IPv4 or IPv6 address, no lookup is performed and
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* gethostbyname2_r() simply copies name into the h_name field
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* and its struct in_addr equivalent into the h_addr_list[0] field of the
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* returned hostent structure.
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*
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* Input Parameters:
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* name - The name of the host to find.
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* type - The type of the address to find.
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*
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* Returned Value:
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* Upon successful completion, this function will return a pointer to a
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* hostent structure if the requested entry was found, and a null pointer
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* if the end of the database was reached or the requested entry was not
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* found.
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*
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* Upon unsuccessful completion, gethostbyname2() will set h_errno to
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* indicate the error
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*
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****************************************************************************/
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FAR struct hostent *gethostbyname2(FAR const char *name, int type)
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{
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FAR struct hostent *res;
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int ret;
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ret = gethostbyname2_r(name, type, &g_hostent, g_hostbuffer,
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CONFIG_NETDB_BUFSIZE, &res, &h_errno);
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return ret == 0 ? res : NULL;
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}
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