120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/****************************************************************************
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* libs/libc/netdb/lib_getservbynamer.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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#include <nuttx/config.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <assert.h>
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#include <nuttx/net/ip.h>
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#include <netdb.h>
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#include "lib_netdb.h"
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#ifdef CONFIG_LIBC_NETDB
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* Declare your services here. TODO: read from /etc/services?
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* REVISIT: This is just an example, lets not add full list here.
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*/
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const struct services_db_s g_services_db[] =
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{
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{ "ntp", 123, IP_PROTO_TCP },
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{ "ntp", 123, IP_PROTO_UDP },
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{ NULL, 0, 0 }
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};
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: getservbyname_r
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****************************************************************************/
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int getservbyname_r(FAR const char *name, FAR const char *proto,
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FAR struct servent *result_buf, FAR char *buf,
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size_t buflen, FAR struct servent **result)
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{
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int protocol;
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int i;
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DEBUGASSERT(name != NULL);
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DEBUGASSERT(result_buf != NULL && result != NULL);
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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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if (proto == NULL)
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{
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protocol = 0;
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}
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else if (strcmp(proto, "tcp") == 0)
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{
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protocol = IPPROTO_TCP;
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}
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else if (strcmp(proto, "udp") == 0)
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{
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protocol = IPPROTO_UDP;
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}
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else
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{
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return EINVAL;
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}
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for (i = 0; g_services_db[i].s_name; i++)
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{
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if (strcmp(name, g_services_db[i].s_name) == 0 &&
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(protocol == 0 || protocol == g_services_db[i].s_protocol))
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{
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result_buf->s_name = (FAR char *)name;
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result_buf->s_aliases = NULL;
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result_buf->s_port = HTONS(g_services_db[i].s_port);
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if (g_services_db[i].s_protocol == IPPROTO_TCP)
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{
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result_buf->s_proto = "tcp";
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}
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else
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{
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result_buf->s_proto = "udp";
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}
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*result = result_buf;
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return 0;
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}
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}
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return ENOENT;
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}
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#endif /* CONFIG_LIBC_NETDB */
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