mirror of
https://github.com/apache/nuttx.git
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libs/libc/netdb: Add getaddrinfo() and friends.
This commit is contained in:
Juha Niskanen
committed by
Gregory Nutt
Gregory Nutt
parent
5c8a975d79
commit
1f4a1eab6d
@@ -9,6 +9,15 @@ config LIBC_NETDB
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menu "NETDB Support"
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config LIBC_GAISTRERROR
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bool "Enable gai_strerror"
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default n
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---help---
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The gai_strerror() function shall return a text string describing an error
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value for the getaddrinfo() and getnameinfo(). But it can also require a lot
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of memory. If this option is not selected, gai_strerror() will still exist in
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the build but it will not decode error values.
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menuconfig NETDB_HOSTFILE
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bool "Network host file support"
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default n
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@@ -38,6 +38,8 @@ ifeq ($(CONFIG_LIBC_NETDB),y)
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# Add the netdb C files to the build
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CSRCS += lib_netdb.c lib_gethostbyname.c lib_gethostbynamer.c
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CSRCS += lib_getservbyname.c lib_getservbynamer.c
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CSRCS += lib_gaistrerror.c lib_freeaddrinfo.c lib_getaddrinfo.c
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# Add host file support
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@@ -56,7 +58,7 @@ CSRCS += lib_dnscache.c
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endif
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endif
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# Add the net directory to the build
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# Add the netdb directory to the build
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DEPPATH += --dep-path netdb
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VPATH += :netdb
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@@ -1,5 +1,5 @@
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/****************************************************************************
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* libs/libc/netdb/lib_dnsclien.c
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* libs/libc/netdb/lib_dnsbind.c
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*
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* Copyright (C) 2007, 2009, 2012, 2014-2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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@@ -1,5 +1,5 @@
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/****************************************************************************
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* libs/libc/netdb/lib_dnscache.c
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* libs/libc/netdb/lib_dnsinit.c
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*
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* Copyright (C) 2007, 2009, 2012, 2014-2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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@@ -0,0 +1,68 @@
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/****************************************************************************
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* libs/libc/netdb/lib_freeaddrinfo.c
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*
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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 <netdb.h>
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#include "libc.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: freeaddrinfo
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****************************************************************************/
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void freeaddrinfo(FAR struct addrinfo *ai)
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{
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FAR struct addrinfo *p;
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DEBUGASSERT(ai != NULL);
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do
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{
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p = ai;
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ai = ai->ai_next;
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lib_free(p);
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}
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while (ai != NULL);
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}
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@@ -0,0 +1,125 @@
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/****************************************************************************
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* libs/libc/netdb/lib_gaistrerror.c
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*
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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 <stdint.h>
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#include <netdb.h>
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct errno_strmap_s
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{
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uint8_t errnum;
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const char *str;
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#ifdef CONFIG_LIBC_GAISTRERROR
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/* This table maps all error numbers to descriptive strings.
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* The only assumption that the code makes with regard to this
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* this table is that it is ordered by error number.
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*
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* The size of this table is quite large. Its size can be
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* reduced by eliminating some of the more obscure error
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* strings.
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*
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* Only short names are currently supported.
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*/
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static const struct errno_strmap_s g_gaierrnomap[] =
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{
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{ EAI_AGAIN, "EAI_AGAIN" },
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{ EAI_BADFLAGS, "EAI_BADFLAGS" },
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{ EAI_FAIL, "EAI_FAIL" },
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{ EAI_FAMILY, "EAI_FAMILY" },
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{ EAI_MEMORY, "EAI_MEMORY" },
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{ EAI_NONAME, "EAI_NONAME" },
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{ EAI_SERVICE, "EAI_SERVICE" },
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{ EAI_SOCKTYPE, "EAI_SOCKTYPE" },
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{ EAI_SYSTEM, "EAI_SYSTEM" },
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{ EAI_OVERFLOW, "EAI_OVERFLOW" },
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};
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#define NERRNO_STRS (sizeof(g_gaierrnomap) / sizeof(struct errno_strmap_s))
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#endif /* CONFIG_LIBC_GAISTRERROR */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: gai_strerror
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****************************************************************************/
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FAR const char *gai_strerror(int errnum)
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{
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#ifdef CONFIG_LIBC_GAISTRERROR
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int ndxlow = 0;
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int ndxhi = NERRNO_STRS - 1;
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int ndxmid;
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do
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{
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ndxmid = (ndxlow + ndxhi) >> 1;
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if (errnum > g_gaierrnomap[ndxmid].errnum)
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{
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ndxlow = ndxmid + 1;
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}
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else if (errnum < g_gaierrnomap[ndxmid].errnum)
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{
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ndxhi = ndxmid - 1;
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}
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else
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{
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return g_gaierrnomap[ndxmid].str;
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}
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}
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while (ndxlow <= ndxhi);
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#endif
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return "Unknown error";
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}
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@@ -0,0 +1,311 @@
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/****************************************************************************
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* libs/libc/netdb/lib_getaddrinfo.c
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*
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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 <arpa/inet.h>
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#include <nuttx/net/loopback.h>
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#include <netdb.h>
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#include "libc.h"
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/****************************************************************************
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* Private Data Types
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****************************************************************************/
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struct ai_s
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{
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struct addrinfo ai;
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union
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{
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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} sa;
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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FAR static struct ai_s *alloc_ai(int family, int port, FAR void *addr)
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{
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struct ai_s *ai;
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socklen_t addrlen;
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addrlen = (family == AF_INET) ? sizeof(struct sockaddr_in)
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: sizeof(struct sockaddr_in6);
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ai = lib_zalloc(sizeof(struct ai_s));
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if (ai == NULL)
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{
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return ai;
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}
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ai->ai.ai_addr = (struct sockaddr *)&ai->sa;
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ai->ai.ai_addrlen = addrlen;
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ai->ai.ai_addr->sa_family = ai->ai.ai_family = family;
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switch (family)
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{
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#ifdef CONFIG_NET_IPv4
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case AF_INET:
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ai->sa.sin.sin_family = AF_INET;
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ai->sa.sin.sin_port = HTONS(port);
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memcpy(&ai->sa.sin.sin_addr, addr, sizeof(ai->sa.sin.sin_addr));
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break;
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#endif
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#ifdef CONFIG_NET_IPv6
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case AF_INET6:
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ai->sa.sin6.sin6_family = AF_INET6;
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ai->sa.sin6.sin6_port = HTONS(port);
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memcpy(&ai->sa.sin6.sin6_addr, addr, sizeof(ai->sa.sin6.sin6_addr));
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break;
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#endif
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}
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return ai;
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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: getaddrinfo
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****************************************************************************/
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int getaddrinfo(FAR const char *restrict hostname,
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FAR const char *restrict servname,
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FAR const struct addrinfo *restrict hint,
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FAR struct addrinfo **restrict res)
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{
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int family = AF_UNSPEC;
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int port = 0;
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int flags = 0;
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int proto = 0;
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int socktype = 0;
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struct hostent *hp;
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struct ai_s *ai;
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struct ai_s *prev_ai = NULL;
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const int valid_flags = AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST |
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AI_NUMERICSERV | AI_V4MAPPED | AI_ALL |
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AI_ADDRCONFIG;
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int i;
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if (hostname == NULL && servname == NULL)
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{
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return EAI_NONAME;
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}
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if (hint)
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{
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family = hint->ai_family;
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flags = hint->ai_flags;
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proto = hint->ai_protocol;
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socktype = hint->ai_socktype;
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if ((flags & valid_flags) != flags)
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{
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return EAI_BADFLAGS;
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}
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if (family != AF_INET &&
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family != AF_INET6 &&
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family != AF_UNSPEC)
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{
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return EAI_FAMILY;
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}
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}
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if (servname)
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{
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char *endp;
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struct servent *sp;
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port = strtol(servname, &endp, 10);
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if (port > 0 && port <= 65535 && *endp == '\0')
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{
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port = HTONS(port);
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}
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else if (flags & AI_NUMERICSERV)
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{
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return EAI_NONAME;
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}
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else if ((sp = getservbyname(servname, NULL)) != NULL)
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{
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port = sp->s_port;
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}
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else
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{
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return EAI_SERVICE;
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}
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}
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if (flags & AI_PASSIVE)
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{
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in_addr_t addr;
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addr = hostname ? inet_addr(hostname) : HTONL(0x00000000);
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/* REVISIT: IPv6? */
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ai = alloc_ai(AF_INET, port, &addr);
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if (ai == NULL)
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{
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return EAI_MEMORY;
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}
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*res = (struct addrinfo *)ai;
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return OK;
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}
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*res = NULL;
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if (!hostname)
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{
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#ifdef CONFIG_NET_LOOPBACK
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/* Local service. */
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#ifdef CONFIG_NET_IPv4
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if (family == AF_INET || family == AF_UNSPEC)
|
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{
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ai = alloc_ai(AF_INET, port, (void *)&g_lo_ipv4addr);
|
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if (ai == NULL)
|
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{
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return EAI_MEMORY;
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}
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*res = (struct addrinfo *)ai;
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}
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#endif
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#ifdef CONFIG_NET_IPv6
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if (family == AF_INET6 || family == AF_UNSPEC)
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{
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ai = alloc_ai(AF_INET6, port, (void *)&g_lo_ipv6addr);
|
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if (ai == NULL)
|
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{
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return (*res != NULL) ? OK : EAI_MEMORY;
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}
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/* Can return both IPv4 and IPv6 loopback. */
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if (*res != NULL)
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{
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(*res)->ai_next = (struct addrinfo *)ai;
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}
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else
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{
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*res = (struct addrinfo *)ai;
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}
|
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}
|
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#endif
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return (*res != NULL) ? OK : EAI_FAMILY;
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#else
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/* Local service, but no loopback so cannot succeed. */
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return EAI_FAIL;
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#endif /* CONFIG_NET_LOOPBACK */
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}
|
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|
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/* REVISIT: no check for AI_NUMERICHOST flag. */
|
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|
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/* REVISIT: use gethostbyname_r with own buffer of refactor all
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* public APIs to use internal lookup function.
|
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*/
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hp = gethostbyname(hostname);
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if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0])
|
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{
|
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for (i = 0; hp->h_addr_list[i]; i++)
|
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{
|
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if (family != AF_UNSPEC && hp->h_addrtype != family)
|
||||
{
|
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/* Filter by protocol family. */
|
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continue;
|
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}
|
||||
|
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/* REVISIT: filter by socktype and protocol not implemented. */
|
||||
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UNUSED(proto);
|
||||
UNUSED(socktype);
|
||||
|
||||
ai = alloc_ai(hp->h_addrtype, port, hp->h_addr_list[i]);
|
||||
if (ai == NULL)
|
||||
{
|
||||
if (*res)
|
||||
{
|
||||
freeaddrinfo(*res);
|
||||
}
|
||||
|
||||
return EAI_MEMORY;
|
||||
}
|
||||
|
||||
/* REVISIT: grok canonical name.
|
||||
*
|
||||
* OpenGroup: "if the canonical name is not available, then ai_canonname shall
|
||||
* refer to the hostname argument or a string with the same contents."
|
||||
*/
|
||||
|
||||
ai->ai.ai_canonname = (char *)hostname;
|
||||
|
||||
/* Add result to linked list.
|
||||
* TODO: RFC 3484/6724 destination address sort not implemented.
|
||||
*/
|
||||
|
||||
if (prev_ai)
|
||||
{
|
||||
prev_ai->ai.ai_next = (struct addrinfo *)ai;
|
||||
}
|
||||
else
|
||||
{
|
||||
*res = (struct addrinfo *)ai;
|
||||
}
|
||||
|
||||
prev_ai = ai;
|
||||
}
|
||||
|
||||
return OK;
|
||||
}
|
||||
|
||||
return EAI_AGAIN;
|
||||
}
|
||||
|
||||
@@ -52,7 +52,7 @@
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: gethostname
|
||||
* Name: gethostbyname
|
||||
*
|
||||
* Description:
|
||||
* The gethostbyname() function returns a structure of type hostent for
|
||||
|
||||
@@ -697,7 +697,7 @@ errorout_with_herrnocode:
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: gethostname_r
|
||||
* Name: gethostbyname_r
|
||||
*
|
||||
* Description:
|
||||
* The gethostbyname_r() function returns a structure of type hostent for
|
||||
|
||||
@@ -0,0 +1,66 @@
|
||||
/****************************************************************************
|
||||
* libs/libc/netdb/lib_getservbyname.c
|
||||
*
|
||||
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
|
||||
* Author: Juha Niskanen <juha.niskanen@haltian.com>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <netdb.h>
|
||||
|
||||
#ifdef CONFIG_LIBC_NETDB
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: getservbyname
|
||||
****************************************************************************/
|
||||
|
||||
FAR struct servent *getservbyname(FAR const char *name, FAR const char *proto)
|
||||
{
|
||||
static struct servent ent;
|
||||
static char *buf[2];
|
||||
struct servent *res;
|
||||
int ret;
|
||||
|
||||
ret = getservbyname_r(name, proto, &ent, (void *)buf, sizeof buf, &res);
|
||||
return (ret != OK) ? NULL : res;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_LIBC_NETDB */
|
||||
|
||||
@@ -0,0 +1,169 @@
|
||||
/****************************************************************************
|
||||
* libs/libc/netdb/lib_getservbynamer.c
|
||||
*
|
||||
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
|
||||
* Author: Juha Niskanen <juha.niskanen@haltian.com>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <errno.h>
|
||||
#include <assert.h>
|
||||
#include <nuttx/net/ip.h>
|
||||
|
||||
#include <netdb.h>
|
||||
|
||||
#ifdef CONFIG_LIBC_NETDB
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef ARRAY_SIZE
|
||||
# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Private Data Types
|
||||
****************************************************************************/
|
||||
|
||||
struct services_db_s
|
||||
{
|
||||
const char *s_name;
|
||||
int s_port;
|
||||
int s_protocol;
|
||||
};
|
||||
|
||||
/****************************************************************************
|
||||
* Private Data
|
||||
****************************************************************************/
|
||||
|
||||
/* Declare your services here. TODO: read from /etc/services?
|
||||
* REVISIT: This is just an example, lets not add full list here.
|
||||
*/
|
||||
|
||||
const static struct services_db_s g_services_db[] =
|
||||
{
|
||||
{ "ntp", 123, IP_PROTO_TCP },
|
||||
{ "ntp", 123, IP_PROTO_UDP },
|
||||
};
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: getservbyname_r
|
||||
****************************************************************************/
|
||||
|
||||
int getservbyname_r(FAR const char *name, FAR const char *proto,
|
||||
FAR struct servent *result_buf, FAR char *buf,
|
||||
size_t buflen, FAR struct servent **result)
|
||||
{
|
||||
char *end = "";
|
||||
int protocol;
|
||||
int i;
|
||||
|
||||
DEBUGASSERT(name != NULL && buf != NULL);
|
||||
DEBUGASSERT(result_buf != NULL && result != NULL);
|
||||
|
||||
/* Linux man page says result must be NULL in case of failure. */
|
||||
|
||||
*result = NULL;
|
||||
|
||||
/* We need space for two pointers for hostalias strings. */
|
||||
|
||||
if (buflen < 2 * sizeof(char *))
|
||||
{
|
||||
return ERANGE;
|
||||
}
|
||||
|
||||
/* Numeric port number strings are not service records. */
|
||||
|
||||
strtoul(name, &end, 10);
|
||||
if (*end == '\0')
|
||||
{
|
||||
return ENOENT;
|
||||
}
|
||||
|
||||
if (proto == NULL)
|
||||
{
|
||||
protocol = 0;
|
||||
}
|
||||
else if (strcmp(proto, "tcp") == 0)
|
||||
{
|
||||
protocol = IPPROTO_TCP;
|
||||
}
|
||||
else if (strcmp(proto, "udp") == 0)
|
||||
{
|
||||
protocol = IPPROTO_UDP;
|
||||
}
|
||||
else
|
||||
{
|
||||
return EINVAL;
|
||||
}
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(g_services_db); i++)
|
||||
{
|
||||
if (strcmp(name, g_services_db[i].s_name) == 0 &&
|
||||
(protocol == 0 || protocol == g_services_db[i].s_protocol))
|
||||
{
|
||||
result_buf->s_name = (char *)name;
|
||||
result_buf->s_aliases = (void *)buf;
|
||||
result_buf->s_aliases[0] = (char *)name;
|
||||
result_buf->s_aliases[1] = NULL;
|
||||
result_buf->s_port = HTONS(g_services_db[i].s_port);
|
||||
|
||||
if (g_services_db[i].s_protocol == IPPROTO_TCP)
|
||||
{
|
||||
result_buf->s_proto = "tcp";
|
||||
}
|
||||
else
|
||||
{
|
||||
result_buf->s_proto = "udp";
|
||||
}
|
||||
|
||||
*result = result_buf;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
return ENOENT;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_LIBC_NETDB */
|
||||
|
||||
@@ -10,12 +10,12 @@ config LIBC_STRERROR
|
||||
default n
|
||||
---help---
|
||||
strerror() is useful because it decodes 'errno' values into a human readable
|
||||
strings. But it can also require a lot of memory. If this option is selected,
|
||||
strerror() will still exist in the build but it will not decode error values.
|
||||
This option should be used by other logic to decide if it should use strerror()
|
||||
or not. For example, the NSH application will not use strerror() if this
|
||||
option is not selected; perror() will not use strerror() is this option is not
|
||||
selected (see also NSH_STRERROR).
|
||||
strings. But it can also require a lot of memory. If this option is not
|
||||
selected, strerror() will still exist in the build but it will not decode error
|
||||
values. This option should be used by other logic to decide if it should use
|
||||
strerror() or not. For example, the NSH application will not use strerror()
|
||||
if this option is not selected; perror() will not use strerror() is this option
|
||||
is not selected (see also NSH_STRERROR).
|
||||
|
||||
config LIBC_STRERROR_SHORT
|
||||
bool "Use short error descriptions in strerror()"
|
||||
|
||||
Reference in New Issue
Block a user