108 lines
3.8 KiB
C
108 lines
3.8 KiB
C
/****************************************************************************
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* libs/libc/netdb/lib_gethostbyname2r.c
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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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/****************************************************************************
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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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#ifdef CONFIG_LIBC_NETDB
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: gethostbyname2_r
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*
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* Description:
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* The gethostbyname2_r() 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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* gethostname2_r() is *not* POSIX but is similar to a Glibc extension and
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* is used internally by NuttX to implement the POSIX gethostname().
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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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* host - Caller provided location to return the host data.
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* buf - Caller provided buffer to hold string data associated with the
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* host data.
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* buflen - The size of the caller-provided buffer
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* result - There host entry returned in the event of a success.
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* h_errnop - There h_errno value returned in the event of a failure.
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*
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* Returned Value:
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* Zero (OK) is returned on success, -1 (ERROR) is returned on a failure
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* with the returned h_errno value provided the reason for the failure.
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*
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****************************************************************************/
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int gethostbyname2_r(FAR const char *name, int type,
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FAR struct hostent *host, FAR char *buf,
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size_t buflen, FAR struct hostent **result,
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FAR int *h_errnop)
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{
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struct hostent_s tmp;
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int ret;
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/* Linux man page says result must be NULL in case of failure. */
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*result = NULL;
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ret = gethostentbyname_r(name, &tmp, buf, buflen, h_errnop, 0);
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if (ret == OK)
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{
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if (convert_hostent(&tmp, type, host))
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{
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*result = host;
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}
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else
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{
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if (h_errnop)
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{
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*h_errnop = HOST_NOT_FOUND;
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}
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ret = ERROR;
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}
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}
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return ret;
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}
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#endif /* CONFIG_LIBC_NETDB */
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