133 lines
4.2 KiB
C
133 lines
4.2 KiB
C
/****************************************************************************
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* libs/libc/netdb/lib_getservbyportr.c
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Author: Michael Jung <mijung@gmx.net>
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*
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* Based on libs/libc/netdb/lib_getservbynamer.c
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Juha Niskanen <juha.niskanen@haltian.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: getservbyport_r
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****************************************************************************/
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int getservbyport_r(int port, 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(buf != 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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/* We need space for two pointers for hostalias strings. */
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if (buflen < 2 * sizeof(char *))
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{
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return ERANGE;
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}
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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 (port == g_services_db[i].s_port &&
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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 = (char *)g_services_db[i].s_name;
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result_buf->s_aliases = (void *)buf;
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result_buf->s_aliases[0] = (char *)g_services_db[i].s_name;
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result_buf->s_aliases[1] = 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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