strcf(4) UNIX System V(Internet Utilities) strcf(4)
NAME
strcf - STREAMS Configuration File for STREAMS TCP/IP
DESCRIPTION
/etc/strcf contains the script that is executed by slink(1M) to perform
the STREAMS configuration operations required for STREAMS TCP/IP.
The standard /etc/strcf file contains several functions that perform
various configuration operations, along with a sample boot function.
Normally, only the boot function must be modified to customize the
configuration for a given installation. In some cases, however, it may
be necessary to change existing functions or add new functions.
The following functions perform basic linking operations:
The tp function is used to set up the link between a transport provider,
such as TCP, and IP.
#
# tp - configure transport provider (that is, tcp, udp, icmp)
# usage: tp devname
#
tp {
p = open $1
ip = open /dev/ip
link p ip
}
The linkint function links the specified streams and does a sifname
operation with the given name.
#
# linkint - link interface to ip or arp
# usage: linkint top bottom ifname
#
linkint {
x = link $1 $2
sifname $1 x $3
}
The aplinkint function performs the same function as linkint for an
interface that uses the app module.
#
# aplinkint - like linkint, but app is pushed on dev
# usage: aplinkint top bottom ifname
#
aplinkint {
push $2 app
linkint $1 $2 $3
}
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strcf(4) UNIX System V(Internet Utilities) strcf(4)
The following functions are used to configure different types of Ethernet
interfaces:
The uenet function is used to configure an Ethernet interface for a
cloning device driver that uses the unit select ioctl to select the
desired interface. The interface name is constructed by concatenating
the supplied prefix and the unit number.
#
# uenet - configure ethernet-type interface for cloning driver using
# unit select
# usage: uenet ip-fd devname ifprefix unit
#
uenet {
ifname = strcat $3 $4
dev = open $2
unitsel dev $4
aplinkint $1 dev ifname
dev = open $2
unitsel dev $4
arp = open /dev/arp
linkint arp dev ifname
}
The denet function performs the same function as uenet, except that
DLATTACH is used instead of unit select.
#
# denet - configure ethernet-type interface for cloning driver using
# DLATTACH
# usage: denet ip-fd devname ifprefix unit
#
denet {
ifname = strcat $3 $4
dev = open $2
dlattach dev $4
aplinkint $1 dev ifname
dev = open $2
dlattach dev $4
arp = open /dev/arp
linkint arp dev ifname
}
The cenet function is used to configure an Ethernet interface for a
cloning device driver that uses a different major number for each
interface. The device name is formed by concatenating the supplied
device name prefix and the unit number. The interface name is formed in
a similar manner using the interface name prefix.
#
# cenet - configure ethernet-type interface for cloning driver with
# one major per interface
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strcf(4) UNIX System V(Internet Utilities) strcf(4)
# usage: cenet ip-fd devprefix ifprefix unit
#
cenet {
devname = strcat $2 $4
ifname = strcat $3 $4
dev = open devname
aplinkint $1 dev ifname
dev = open devname
arp = open /dev/arp
linkint arp dev ifname
}
The senet function is used to configure an Ethernet interface for a non-
cloning device driver. Two different device nodes must be specified for
IP and ARP.
#
# senet - configure ethernet-type interface for non-cloning driver
# usage: senet ip-fd ipdevname arpdevname ifname
#
senet {
dev = open $2
aplinkint $1 dev $4
dev = open $3
arp = open /dev/arp
linkint arp dev $4
}
The senetc function is like senet, except that it allows the
specification of a convergence module to be used with the ethernet driver
(such as, for the 3B2 emd driver).
#
# senetc - configure ethernet-type interface for non-cloning driver
# using convergence module
# usage: senetc ip-fd convergence ipdevname arpdevname ifname
#
senetc {
dev = open $3
push dev $2
aplinkint $1 dev $5
dev = open $4
push dev $2
arp = open /dev/arp
linkint arp dev $5
}
The loopback function is used to configure the loopback interface.
#
# loopback - configure loopback device
# usage: loopback ip-fd
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strcf(4) UNIX System V(Internet Utilities) strcf(4)
#
loopback {
dev = open /dev/loop
linkint $1 dev lo0
}
The slip function is used to configure a SLIP interface.
#
# slip - configure slip interface
# usage: slip unit
#
slip {
ip = open /dev/ip
s = open /dev/slip
ifname = strcat sl $1
unitsel s $1
linkint ip s ifname
}
The boot function is called by default when slink is executed. Normally,
only the interfaces section and possibly the queue params section will
have to be customized for a given installation. Examples are provided
for the various Ethernet driver types.
#
# boot - boot time configuration
#
boot {
#
# queue params
#
initqp /dev/udp rq 8192 40960
initqp /dev/ip muxrq 8192 40960 rq 8192 40960
#
# transport
#
tp /dev/tcp
tp /dev/udp
tp /dev/icmp
tp /dev/rawip
}
FILES
/etc/strcf
SEE ALSO
slink(1M)
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