2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
154 lines
4.8 KiB
Groff
154 lines
4.8 KiB
Groff
.\" $NetBSD: inet_net.3,v 1.2 2008/04/30 13:10:50 martin Exp $
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.\"
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.\" Copyright (c) 1997 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Luke Mewburn.
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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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.\" 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 the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN 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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.Dd December 8, 2001
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.Dt INET_NET 3
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.Os
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.Sh NAME
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.Nm inet_net_ntop ,
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.Nm inet_net_pton
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.Nd Internet network number manipulation routines
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/socket.h
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.In netinet/in.h
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.In arpa/inet.h
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.Ft char *
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.Fn inet_net_ntop "int af" "const void *src" "int bits" "char *dst" "size_t size"
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.Ft int
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.Fn inet_net_pton "int af" "const char *src" "void *dst" "size_t size"
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.Sh DESCRIPTION
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The
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.Fn inet_net_ntop
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function converts an Internet network number from network format (usually a
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.Ft struct in_addr
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or some other binary form, in network byte order) to CIDR presentation format
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(suitable for external display purposes).
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.Fa bits
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is the number of bits in
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.Fa src
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that are the network number.
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It returns NULL if a system error occurs (in which case,
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.Va errno
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will have been set), or it returns a pointer to the destination string.
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.Pp
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The
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.Fn inet_net_pton
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function converts a presentation format Internet network number (that is,
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printable form as held in a character string) to network format (usually a
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.Ft struct in_addr
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or some other internal binary representation, in network byte order).
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It returns the number of bits (either computed based on the class, or
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specified with /CIDR), or -1 if a failure occurred
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(in which case
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.Va errno
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will have been set.
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It will be set to
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.Er ENOENT
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if the Internet network number was not valid).
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.Pp
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The currently supported values for
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.Fa af
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are
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.Dv AF_INET
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and
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.Dv AF_INET6 .
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.Fa size
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is the size of the result buffer
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.Fa dst .
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.Sh NETWORK NUMBERS (IP VERSION 4)
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Internet network numbers may be specified in one of the following forms:
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.Bd -literal -offset indent
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a.b.c.d/bits
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a.b.c.d
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a.b.c
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a.b
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a
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.Ed
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.Pp
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When four parts are specified, each is interpreted
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as a byte of data and assigned, from left to right,
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to the four bytes of an Internet network number. Note
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that when an Internet network number is viewed as a 32-bit
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integer quantity on a system that uses little-endian
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byte order (such as the
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.Tn Intel 386, 486
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and
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.Tn Pentium
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processors) the bytes referred to above appear as
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.Dq Li d.c.b.a .
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That is, little-endian bytes are ordered from right to left.
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.Pp
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When a three part number is specified, the last
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part is interpreted as a 16-bit quantity and placed
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in the right-most two bytes of the Internet network number.
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This makes the three part number format convenient
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for specifying Class B network numbers as
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.Dq Li 128.net.host .
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.Pp
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When a two part number is supplied, the last part
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is interpreted as a 24-bit quantity and placed in
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the right most three bytes of the Internet network number.
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This makes the two part number format convenient
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for specifying Class A network numbers as
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.Dq Li net.host .
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.Pp
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When only one part is given, the value is stored
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directly in the Internet network number without any byte
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rearrangement.
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.Pp
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All numbers supplied as
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.Dq parts
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in a
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.Ql \&.
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notation
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may be decimal, octal, or hexadecimal, as specified
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in the C language (i.e., a leading 0x or 0X implies
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hexadecimal; otherwise, a leading 0 implies octal;
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otherwise, the number is interpreted as decimal).
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.\"
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.\" .Sh NETWORK NUMBERS (IP VERSION 6)
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.\" XXX - document this!
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.\"
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.Sh SEE ALSO
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.Xr byteorder 3 ,
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.Xr inet 3 ,
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.Xr networks 5
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.Sh HISTORY
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The
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.Nm inet_net_ntop
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and
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.Nm inet_net_pton
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functions appeared in BIND 4.9.4 and thence
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.Nx 1.3 .
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Support for
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.Dv AF_INET6
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appeared in
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.Nx 1.6 .
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