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File Formats netconfig(4)
NAME
netconfig - network configuration database
SYNOPSIS
/etc/netconfig
DESCRIPTION
The network configuration database, /etc/netconfig, is a
system file used to store information about networks that
are connected to the system. The netconfig database and the
routines that access it (see getnetconfig(3NSL)) are part of
the Network Selection component. The Network Selection com-
ponent also includes getnetpath(3NSL) routines to provide
application-specific network search paths. These routines
access the netconfig database based on the environment vari-
able NETPATH. See environ(5).
netconfig contains an entry for each network available on
the system. Entries are separated by newlines. Fields are
separated by whitespace and occur in the order in which they
are described below. Whitespace can be embedded as
``\blank'' or ``\tab''. Backslashes may be embedded as
``\\''. Lines in /etc/netconfig that begin with a # (hash)
in column 1 are treated as comments.
Each of the valid lines in the netconfig database correspond
to an available transport. Each entry is of the form:
network ID semantics flag protocol-family
protocol-name network-device translation-libraries
network ID A string used to uniquely identify a
network. network ID consists of
non-null characters, and has a
length of at least 1. No maximum
length is specified. This namespace
is locally significant and the local
system administrator is the naming
authority. All network IDs on a sys-
tem must be unique.
semantics The semantics field is a string
identifying the ``semantics'' of the
network, that is, the set of ser-
vices it supports, by identifying
the service interface it provides.
The semantics field is mandatory.
SunOS 5.10 Last change: 18 Nov 2003 1
File Formats netconfig(4)
The following semantics are recog-
nized.
tpi_clts Transport Provider
Interface, connec-
tionless
tpi_cots Transport Provider
Interface, connec-
tion oriented
tpi_cots_ord Transport Provider
Interface, connec-
tion oriented, sup-
ports orderly
release.
flag The flag field records certain two-
valued (``true'' and ``false'')
attributes of networks. flag is a
string composed of a combination of
characters, each of which indicates
the value of the corresponding
attribute. If the character is
present, the attribute is ``true.''
If the character is absent, the
attribute is ``false.'' ``-'' indi-
cates that none of the attributes
are present. Only one character is
currently recognized:
v Visible
(``default'') net-
work. Used when the
environment variable
NETPATH is unset.
protocol family The protocol family and protocol
name fields are provided for
protocol-specific applications. The
SunOS 5.10 Last change: 18 Nov 2003 2
File Formats netconfig(4)
protocol family field contains a
string that identifies a protocol
family. The protocol family identif-
ier follows the same rules as those
for network IDs; the string consists
of non-null characters, it has a
length of at least 1, and there is
no maximum length specified. A
``-'' in the protocol family field
indicates that no protocol family
identifier applies (the network is
experimental). The following are
examples:
loopback Loopback (local to
host).
inet Internetwork: UDP,
TCP, and the like.
inet6 Internetwork over
IPv6: UDP, TCP, and
the like.
implink ARPANET imp
addresses
pup PUP protocols: for
example, BSP
chaos MIT CHAOS protocols
ns XEROX NS protocols
nbs NBS protocols
SunOS 5.10 Last change: 18 Nov 2003 3
File Formats netconfig(4)
ecma European Computer
Manufacturers Asso-
ciation
datakit DATAKIT protocols
ccitt CCITT protocols,
X.25, and the like.
sna IBM SNA
decnet DECNET
dli Direct data link
interface
lat LAT
hylink NSC Hyperchannel
appletalk Apple Talk
nit Network Interface
Tap
ieee802 IEEE 802.2; also ISO
8802
osi Umbrella for all
families used by OSI
SunOS 5.10 Last change: 18 Nov 2003 4
File Formats netconfig(4)
(for example, pro-
tosw lookup)
x25 CCITT X.25 in par-
ticular
osinet AFI = 47, IDI = 4
gosip U.S. Government OSI
protocol name The protocol name field contains a
string that identifies a protocol.
The protocol name identifier follows
the same rules as those for network
IDs; that is, the string consists of
non-NULL characters, it has a length
of at least 1, and there is no max-
imum length specified. A ``-'' indi-
cates that none of the names listed
apply. The following protocol names
are recognized.
tcp Transmission Control
Protocol
udp User Datagram Proto-
col
icmp Internet Control
Message Protocol
network device The network device is the full path-
name of the device used to connect
to the transport provider. Typi-
cally, this device will be in the
SunOS 5.10 Last change: 18 Nov 2003 5
File Formats netconfig(4)
/dev directory. The network device
must be specified.
translation libraries The name-to-address translation
libraries support a ``directory ser-
vice'' (a name-to-address mapping
service) for the network. A ``-'' in
this field indicates the absence of
any translation libraries. This has
a special meaning for networks of
the protocol family inet : its
name-to-address mapping is provided
by the name service switch based on
the entries for hosts and services
in nsswitch.conf(4). For networks of
other families, a ``-'' indicates
non-functional name-to-address map-
ping. Otherwise, this field consists
of a comma-separated list of path-
names to dynamically linked
libraries. The pathname of the
library can be either absolute or
relative. See dlopen(3C).
Each field corresponds to an element in the struct netconfig
structure. struct netconfig and the identifiers described on
this manual page are defined in <netconfig.h>. This struc-
ture includes the following members:
char *nc_netid Network ID, includ-
ing NULL terminator.
unsigned long nc_semantics Semantics.
unsigned long nc_flag Flags.
char *nc_protofmly Protocol family.
char *nc_proto Protocol name.
SunOS 5.10 Last change: 18 Nov 2003 6
File Formats netconfig(4)
char *nc_device Full pathname of the
network device.
unsigned long nc_nlookups Number of directory
lookup libraries.
char **nc_lookups Names of the name-
to-address transla-
tion libraries.
unsigned long nc_unused[9] Reserved for future
expansion.
The nc_semantics field takes the following values,
corresponding to the semantics identified above:
NC_TPI_CLTS
NC_TPI_COTS
NC_TPI_COTS_ORD The nc_flag field is a bitfield.
The following bit, corresponding to the attribute
identified above, is currently recognized.
NC_NOFLAG indicates the absence of any attributes.
NC_VISIBLE
EXAMPLES
Example 1: A Sample netconfig File
Below is a sample netconfig file:
#
# The "Network Configuration" File.
#
# Each entry is of the form:
#
# <networkid> <semantics> <flags> <protofamily> <protoname> <device>
# <nametoaddrlibs>
#
SunOS 5.10 Last change: 18 Nov 2003 7
File Formats netconfig(4)
# The "-" in <nametoaddrlibs> for inet family transports indicates
# redirection to the name service switch policies for "hosts" and
# "services". The "-" may be replaced by nametoaddr libraries that
# comply with the SVr4 specs, in which case the name service switch
# will not be used for netdir_getbyname, netdir_getbyaddr,
# gethostbyname, gethostbyaddr, getservbyname, and getservbyport.
# There are no nametoaddr_libs for the inet family in Solaris anymore.
#
udp6 tpi_clts v inet6 udp /dev/udp6 -
tcp6 tpi_cots_ord v inet6 tcp /dev/tcp6 -
udp tpi_clts v inet udp /dev/udp -
tcp tpi_cots_ord v inet tcp /dev/tcp -
rawip tpi_raw - inet - /dev/rawip -
ticlts tpi_clts v loopback - /dev/ticlts straddr.so
ticotsord tpi_cots_ord v loopback - /dev/ticotsord straddr.so
ticots tpi_cots v loopback - /dev/ticots straddr.so
FILES
<netconfig.h>
SEE ALSO
dlopen(3C), getnetconfig(3NSL), getnetpath(3NSL),
nsswitch.conf(4)
System Administration Guide: IP Services
SunOS 5.10 Last change: 18 Nov 2003 8
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Wed Sep 12 11:27:26 GMT 2007
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