298 lines
9.6 KiB
C
298 lines
9.6 KiB
C
/****************************************************************************
|
|
* libc/net/lib_inetntop.c
|
|
*
|
|
* Copyright (C) 2012, 2015 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Includes some logic extracted from hwport_ftpd, written by Jaehyuk Cho
|
|
* <minzkn@minzkn.com> which was released under the BSD license.
|
|
*
|
|
* Copyright (C) HWPORT.COM. All rights reserved.
|
|
* Author: JAEHYUK CHO <mailto:minzkn@minzkn.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 <sys/socket.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
#include <arpa/inet.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* If netdb support is enabled, then we need to be able to manage IPv4 and
|
|
* IPv6 addresses, regardless of networking support.
|
|
*/
|
|
|
|
#ifdef CONFIG_NETDB_HOSTFILE
|
|
# undef CONFIG_LIBC_IPv4_ADDRCONV
|
|
# undef CONFIG_LIBC_IPv6_ADDRCONV
|
|
# define CONFIG_LIBC_IPv4_ADDRCONV 1
|
|
# define CONFIG_LIBC_IPv6_ADDRCONV 1
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: inet_ipv4_ntop
|
|
*
|
|
* Description:
|
|
* The inet_ipv4_ntop() function converts a numeric IPv4 address into a
|
|
* text string suitable for presentation.
|
|
*
|
|
* Input Parameters:
|
|
* src - The src argument points to a buffer holding an address of the
|
|
* specified type. The address must be in network byte order.
|
|
* dest - The dest argument points to a buffer where the function stores
|
|
* the resulting text string; it shall not be NULL.
|
|
* size - The size argument specifies the size of this buffer, which must
|
|
* be large enough to hold the text string (INET_ADDRSTRLEN
|
|
* characters for IPv4, INET6_ADDRSTRLEN characters for IPv6).
|
|
*
|
|
* Returned Value:
|
|
* inet_ntop() returns a pointer to the buffer containing the text string
|
|
* if the conversion succeeds. Otherwise, NULL is returned and the errno
|
|
* is set to indicate the error. There follow errno values may be set:
|
|
*
|
|
* ENOSPC - The size of the inet_ntop() result buffer is inadequate
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(CONFIG_NET_IPv4) || defined(CONFIG_LIBC_IPv4_ADDRCONV)
|
|
static int inet_ipv4_ntop(FAR const void *src, FAR char *dest, socklen_t size)
|
|
{
|
|
FAR char *ptr;
|
|
|
|
if (size < INET_ADDRSTRLEN)
|
|
{
|
|
return -ENOSPC;
|
|
}
|
|
|
|
ptr = (FAR char *)src;
|
|
sprintf(dest, "%d.%d.%d.%d", ptr[0], ptr[1], ptr[2], ptr[3]);
|
|
return OK;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: inet_ipv6_ntop
|
|
*
|
|
* Description:
|
|
* The inet_ipv6_ntop() function converts a numeric IPv6 address into a
|
|
* text string suitable for presentation.
|
|
*
|
|
* Input Parameters:
|
|
* af - The af argument specifies the family of the address. This can be
|
|
* AF_INET or AF_INET6.
|
|
* src - The src argument points to a buffer holding an address of the
|
|
* specified type. The address must be in network byte order.
|
|
* dest - The dest argument points to a buffer where the function stores
|
|
* the resulting text string; it shall not be NULL.
|
|
* size - The size argument specifies the size of this buffer, which must
|
|
* be large enough to hold the text string (INET_ADDRSTRLEN
|
|
* characters for IPv4, INET6_ADDRSTRLEN characters for IPv6).
|
|
*
|
|
* Returned Value:
|
|
* inet_ntop() returns a pointer to the buffer containing the text string
|
|
* if the conversion succeeds. Otherwise, NULL is returned and the errno
|
|
* is set to indicate the error. There follow errno values may be set:
|
|
*
|
|
* EAFNOSUPPORT - The af argument is invalid.
|
|
* ENOSPC - The size of the inet_ntop() result buffer is inadequate
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(CONFIG_NET_IPv6) || defined(CONFIG_LIBC_IPv6_ADDRCONV)
|
|
static int inet_ipv6_ntop(FAR const void *src, FAR char *dest, socklen_t size)
|
|
{
|
|
FAR const struct in6_addr *in6_addr;
|
|
uint16_t warray[8];
|
|
int offset;
|
|
int entry;
|
|
int count;
|
|
int maxentry;
|
|
int maxcount;
|
|
|
|
if (size < INET6_ADDRSTRLEN)
|
|
{
|
|
return -ENOSPC;
|
|
}
|
|
|
|
in6_addr = (FAR const struct in6_addr *)src;
|
|
entry = -1;
|
|
maxentry = -1;
|
|
maxcount = 0;
|
|
offset = 0;
|
|
|
|
while (offset < 8)
|
|
{
|
|
warray[offset] = ntohs(in6_addr->s6_addr16[offset]);
|
|
if (warray[offset] == 0)
|
|
{
|
|
entry = offset;
|
|
count = 1;
|
|
offset++;
|
|
|
|
while (offset < 8)
|
|
{
|
|
warray[offset] = ntohs(in6_addr->s6_addr16[offset]);
|
|
if (warray[offset] != 0)
|
|
{
|
|
break;
|
|
}
|
|
offset++;
|
|
count++;
|
|
}
|
|
|
|
if (count > maxcount)
|
|
{
|
|
maxentry = entry;
|
|
maxcount = count;
|
|
}
|
|
}
|
|
offset++;
|
|
}
|
|
|
|
offset = 0;
|
|
dest[0] = '\0';
|
|
|
|
while (offset < 8)
|
|
{
|
|
if (offset == maxentry)
|
|
{
|
|
size -= snprintf(&dest[strlen(dest)], size, ":");
|
|
offset += maxcount;
|
|
if (offset >= 8)
|
|
{
|
|
size -= snprintf(&dest[strlen(dest)], size, ":");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (offset > 0)
|
|
{
|
|
size -= snprintf(&dest[strlen(dest)], size, ":");
|
|
}
|
|
|
|
size -= snprintf(&dest[strlen(dest)], size, "%x", warray[offset]);
|
|
offset++;
|
|
}
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: inet_ntop
|
|
*
|
|
* Description:
|
|
* The inet_ntop() function converts a numeric address into a text string
|
|
* suitable for presentation.
|
|
*
|
|
* Input Parameters:
|
|
* af - The af argument specifies the family of the address. This can be
|
|
* AF_INET or AF_INET6.
|
|
* src - The src argument points to a buffer holding an address of the
|
|
* specified type. The address must be in network byte order.
|
|
* dest - The dest argument points to a buffer where the function stores
|
|
* the resulting text string; it shall not be NULL.
|
|
* size - The size argument specifies the size of this buffer, which must
|
|
* be large enough to hold the text string (INET_ADDRSTRLEN
|
|
* characters for IPv4, INET6_ADDRSTRLEN characters for IPv6).
|
|
*
|
|
* Returned Value:
|
|
* inet_ntop() returns a pointer to the buffer containing the text string
|
|
* if the conversion succeeds. Otherwise, NULL is returned and the errno
|
|
* is set to indicate the error. There follow errno values may be set:
|
|
*
|
|
* EAFNOSUPPORT - The af argument is invalid.
|
|
* ENOSPC - The size of the inet_ntop() result buffer is inadequate
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR const char *inet_ntop(int af, FAR const void *src, FAR char *dest,
|
|
socklen_t size)
|
|
{
|
|
int ret;
|
|
|
|
DEBUGASSERT(src && dest);
|
|
|
|
/* Do the conversion according to the IP version */
|
|
|
|
switch (af)
|
|
{
|
|
#if defined(CONFIG_NET_IPv4) || defined(CONFIG_LIBC_IPv4_ADDRCONV)
|
|
case AF_INET:
|
|
ret = inet_ipv4_ntop(src, dest, size);
|
|
break;
|
|
#endif
|
|
|
|
#if defined(CONFIG_NET_IPv6) || defined(CONFIG_LIBC_IPv6_ADDRCONV)
|
|
case AF_INET6:
|
|
ret = inet_ipv6_ntop(src, dest, size);
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
ret = -EAFNOSUPPORT;
|
|
break;
|
|
}
|
|
|
|
/* Handle errors in the conversion */
|
|
|
|
if (ret < 0)
|
|
{
|
|
set_errno(-ret);
|
|
memset(dest, 0, size);
|
|
return NULL;
|
|
}
|
|
|
|
/* Return success */
|
|
|
|
return dest;
|
|
}
|