diff options
Diffstat (limited to 'src/missing/inet_ntop.c')
| -rw-r--r-- | src/missing/inet_ntop.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/missing/inet_ntop.c b/src/missing/inet_ntop.c new file mode 100644 index 0000000..77a4455 --- /dev/null +++ b/src/missing/inet_ntop.c @@ -0,0 +1,140 @@ +/* + * Copyright (c) 1999 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the Kungliga Tekniska + * Högskolan and its contributors. + * + * 4. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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. + */ + +/* $Id: inet_ntop.c,v 1.7 2003/11/16 09:36:50 guy Exp $ */ + +#ifndef lint +static const char rcsid[] = + "@(#) $Header: /tcpdump/master/tcpdump/missing/inet_ntop.c,v 1.7 2003/11/16 09:36:50 guy Exp $"; +#endif + +/* we aren't tcpdump :) */ +#ifdef notdef +#include <tcpdump-stdinc.h> +#endif + +#include <stdio.h> +#include <sys/types.h> + +#ifndef WIN32 +#include <errno.h> +#include <sys/socket.h> +#include <netinet/in.h> + +#else /* WIN32 */ +#include <time.h> +#include <winsock2.h> +#ifdef DO_IPV6 +#include <ws2tcpip.h> +#endif /* DO_IPV6 */ +#include <windows.h> + +/* The below are copied from netlib.h */ +#ifdef errno +/* delete the one from stdlib.h */ +/*#define errno (*_errno()) */ +#undef errno +#endif +#define errno GetLastError() +#define Set_errno(num) SetLastError((num)) + +/* INVALID_SOCKET == INVALID_HANDLE_VALUE == (unsigned int)(~0) */ +/* SOCKET_ERROR == -1 */ +#define ENOTSOCK WSAENOTSOCK +#define EINTR WSAEINTR +#define ENOBUFS WSAENOBUFS +#define EWOULDBLOCK WSAEWOULDBLOCK +#define EAFNOSUPPORT WSAEAFNOSUPPORT +/* from public\sdk\inc\crt\errno.h */ +#define ENOSPC 28 +#endif /* WIN32 */ + +/* + * + */ + +#ifndef INET_ADDRSTRLEN +#define INET_ADDRSTRLEN 16 +#endif + +static const char * +inet_ntop_v4 (const void *src, char *dst, size_t size) +{ + const char digits[] = "0123456789"; + int i; + struct in_addr *addr = (struct in_addr *)src; + u_long a = ntohl(addr->s_addr); + const char *orig_dst = dst; + + if (size < INET_ADDRSTRLEN) { + Set_errno(ENOSPC); + return NULL; + } + for (i = 0; i < 4; ++i) { + int n = (a >> (24 - i * 8)) & 0xFF; + int non_zerop = 0; + + if (non_zerop || n / 100 > 0) { + *dst++ = digits[n / 100]; + n %= 100; + non_zerop = 1; + } + if (non_zerop || n / 10 > 0) { + *dst++ = digits[n / 10]; + n %= 10; + non_zerop = 1; + } + *dst++ = digits[n]; + if (i != 3) + *dst++ = '.'; + } + *dst++ = '\0'; + return orig_dst; +} + +const char * +inet_ntop(int af, const void *src, char *dst, size_t size) +{ + switch (af) { + case AF_INET : + return inet_ntop_v4 (src, dst, size); + default : + Set_errno(EAFNOSUPPORT); + return NULL; + } +} |