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43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
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/* Convert internet address from internal to printable, presentable format.
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Copyright (C) 2005, 2006 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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/* Converts an internet address from internal format to a printable,
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presentable format.
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AF is an internet address family, such as AF_INET or AF_INET6.
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SRC points to a 'struct in_addr' (for AF_INET) or 'struct in6_addr'
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(for AF_INET6).
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DST points to a buffer having room for CNT bytes.
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The printable representation of the address (in numeric form, not
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surrounded by [...], no reverse DNS is done) is placed in DST, and
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DST is returned. If an error occurs, the return value is NULL and
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errno is set. If CNT bytes are not sufficient to hold the result,
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the return value is NULL and errno is set to ENOSPC. A good value
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for CNT is 46.
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For more details, see the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/inet_ntop.html>. */
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#if !HAVE_DECL_INET_NTOP
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extern const char *inet_ntop (int af, const void *restrict src,
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char *restrict dst, socklen_t cnt);
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#endif
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