635 lines
13 KiB
Bash
Executable file
635 lines
13 KiB
Bash
Executable file
#!/bin/sh
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# Copyright (c) 2020, Geert Rolf
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# GEERT ROLF BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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# Test platforms:
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#
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# Debian 10 (Buster)
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# Raspbian Buster
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# FreeBSD 12.1
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# OpenBSD 6.7
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# NetBSD 9.1
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# CHANGE HISTORY
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# 2021/4/8 avoid setting PATH in scripts for root
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# 2021/5/31 whereis used without -b in OpenBSD and NetBSD
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# Corrected: bridge create and fwdelay done twice for NetBSD
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# FreeBSD: tapX opened by userland program not by ifconfig
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# 2021/11/17 check for existance of br0 done too lousy. Done better.
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#
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# uncomment next line if you need more than one tap = run multiple SIMHs...
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#OPSMODE="expert"
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# ... by editting the saved params file followed by rerun of this script
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OS=`uname -s`
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case $OS in
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"FreeBSD" | "OpenBSD" | "NetBSD")
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# List of Utils
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LOU="ifconfig brconfig sysctl chown netstat"
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# set $util to path of util for all in $LOU
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for U in $LOU
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do
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# whereis -b in only FreeBSD as in Linux
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if test $OS = "FreeBSD"
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then
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eval ${U}="`whereis -b $U |
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awk '{ if($2 != "")
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print $2;
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else
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print "void";
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}'`"
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else
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eval ${U}="`whereis $U |
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awk '{ if($1 != "")
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print $1;
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else
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print "void";
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}'`"
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fi
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done
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# make list of all interfaces ignoring lo
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AVL_IF=`$ifconfig -a |
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grep -v '^[ ]' |
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awk -F: '{ print $1 }' |
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grep -v 'lo' |
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sed '1,$s/^ //'`
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## echo $AVL_IF
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# found bridge0 in active interfaces?
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L=`echo $AVL_IF | grep bridge0 | wc -l`
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if test $L -ne 0
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then
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echo "$0: bridge0 already configured."
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echo "-- if you configured bridge0 statically don't use this script"
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echo "-- otherwise if you do not want permanent settings"
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echo "-- and want bridge0 configured differently reboot first"
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exit 1
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fi
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;;
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"Linux")
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# List of Utils
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LOU="ip brctl tunctl netstat"
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# set $util to path of util for all in $LOU
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for U in $LOU
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do
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eval ${U}="`whereis -b $U |
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awk '{ if($2 != "")
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print $2;
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else
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print "void";
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}'`"
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done
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ERR=0
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# check brctl to exist
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if test $brctl = "void"
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then
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echo 'No brctl program -- please install package bridge-utils'
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ERR=1
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fi
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# check tunctl to exist
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if test $tunctl = "void"
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then
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echo 'No tunctl program -- please install package uml-utilities'
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ERR=1
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fi
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# quit when either not installed
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if test $ERR -eq 1
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then
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exit 1
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fi
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# make list of all interfaces ignoring lo
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AVL_IF=`$ip link show |
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grep '^[0-9]' |
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awk -F: '{ print $2 }' |
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grep -v 'lo' |
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sed '1,$s/^ //'`
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# found br0 in active interfaces?
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L=`echo $AVL_IF | tr ' ' '\012' | grep '^br0$' | wc -l`
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if test $L -ne 0
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then
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echo "$0: br0 already configured."
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echo "-- if you configured br0 statically don't use this script"
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echo "-- otherwise if you do not want permanent settings"
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echo "-- and want br0 configured differently reboot first"
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exit 1
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fi
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;;
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esac
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# let user chose the interface he/she wants to use
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echo " Available networkinterfaces"
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N=0
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for I in $AVL_IF
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do
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N=`expr $N + 1`
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case $OS in
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"FreeBSD" | "OpenBSD" | "NetBSD")
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IPCMD="$ifconfig $I "
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;;
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"Linux")
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IPCMD="$ip addr show $I "
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;;
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esac
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L=`$IPCMD |
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grep 'inet' |
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grep -v 'inet6' |
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wc -l`
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if test $L -eq 0
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then
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M="not configured"
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else
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M=`$IPCMD |
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grep 'inet' |
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grep -v 'inet6' |
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awk '{ print $2 }' `
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fi
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# did we see wlan? alas...
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L=`echo $I | grep wlan | wc -l`
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if test $L -gt 0
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then
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M="$M (wlan not supported)"
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echo "-: $I $M"
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N=`expr $N - 1`
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else
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if test -r SnetSaved.$I
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then
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echo "$N: $I $M (saved params available)"
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else
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echo "$N: $I $M"
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fi
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fi
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done
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# take wlan out
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AVL_IF=`echo $AVL_IF | sed 's/wlan.//'`
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if test $N -gt 1
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then
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ANSWER=0
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while test $ANSWER -lt 1 -o $ANSWER -gt $N
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do
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echo -n "Which interface do you want to use? "
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read ANSWER
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done
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else
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ANSWER=1
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fi
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N=0
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for I in $AVL_IF
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do
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N=`expr $N + 1`
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if test $N -eq $ANSWER
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then
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ACT_IF=$I
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fi
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done
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# see if there are saved params for this interface
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if test -r SnetSaved.$ACT_IF
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then
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. ./SnetSaved.$ACT_IF
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echo "Saved params loaded from SnetSaved.$ACT_IF"
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fi
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echo ""
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echo "Interface to use for SIMH......... " $ACT_IF
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if test "x$IPNR" = "x"
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then
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case $OS in
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"FreeBSD" | "OpenBSD" | "NetBSD")
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IPCMD="$ifconfig $ACT_IF "
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;;
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"Linux")
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IPCMD="$ip addr show dev $ACT_IF "
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;;
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esac
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L=`$IPCMD |
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grep inet |
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grep -v inet6 |
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wc -l`
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if test $L -eq 0
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then
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IPNR="not configured"
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else
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IPNR=`$IPCMD |
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grep inet |
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grep -v inet6 |
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awk '{ print $2 }' `
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fi
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fi
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echo "IPnumber on this interface........ " $IPNR
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if test "x$IPBRO" = "x"
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then
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case $OS in
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"FreeBSD" | "OpenBSD" | "NetBSD")
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IPCMD="$ifconfig $ACT_IF "
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SEDBRO='1s/^.*broadcast //'
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;;
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"Linux")
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IPCMD="$ip addr show dev $ACT_IF "
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SEDBRO='1s/^.*brd //'
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;;
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esac
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IPBRO=`$IPCMD |
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grep inet |
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grep -v inet6 |
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sed "$SEDBRO" |
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sed '1s/[ ].*$//'`
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fi
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echo "IP Broadcast on this interface.... " $IPBRO
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if test "x$DEFRT" = "x"
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then
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case $OS in
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"FreeBSD" | "OpenBSD" | "NetBSD")
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DEFRT=`$netstat -rn |
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grep $ACT_IF |
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grep 'default' |
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awk '{ print $2 }'`
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;;
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"Linux")
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DEFRT=`$netstat -rn |
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grep $ACT_IF |
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grep '^0\.' |
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uniq |
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awk '{ print $2 }'`
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;;
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esac
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fi
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if test "x$DEFRT" = "x"
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then
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echo "Default Route set to Gateway...... " none
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else
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echo "Default Route set to Gateway...... " $DEFRT
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fi
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if test "x$OS" = "xLinux"
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then
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if test "x$IPFWD" = "x"
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then
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IPFWD=`cat /proc/sys/net/ipv4/ip_forward`
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fi
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if test $IPFWD -eq 1
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then
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echo "IP forwarding is active........... " YES
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else
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echo "IP forwarding is active........... " NO
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fi
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fi
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# nr of taps the user wants or 1 for default
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if test "x${NrTaps}" = "x"
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then
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NrTaps=1
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fi
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echo "Number of taps to create.......... " $NrTaps
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# the user who needs access to the tap
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if test "x$SimhUser" = "x"
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then
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case $OS in
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"FreeBSD" | "OpenBSD" | "NetBSD")
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SimhUser="root"
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;;
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"Linux")
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if test "x${SUDO_USER}" != "x"
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then
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SimhUser=${SUDO_USER}
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else
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SimhUser=${USER}
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fi
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;;
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esac
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fi
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echo "User who runs SIMH on the taps.... " $SimhUser
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# only save params when in expert OPSMODE
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if test "X$OPSMODE" = "Xexpert"
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then
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if test ! -r SnetSaved.$ACT_IF
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then
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cat - > SnetSaved.$ACT_IF <<EOF
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#
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# expert users: edit your params and rerun the SetupNet script
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#
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# ipnr including mask
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IPNR=$IPNR
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# do we forward between interfaces 0=no 1=yes
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IPFWD=$IPFWD
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# default gateway
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DEFRT=$DEFRT
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# nr of SIMH emulators you want in parallel that use network
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NrTaps=$NrTaps
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# username of the user running the SIMH emulators
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SimhUser=$SimhUser
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EOF
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L=`ls -l SnetSaved.$ACT_IF | grep root | wc -l`
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if test $L -eq 1
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then
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chown $SimhUser SnetSaved.$ACT_IF
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fi
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fi
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fi
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JOBFILE="/tmp/SNjob.$$"
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TMPFILE="/tmp/SNtmp.$$"
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cat - > $JOBFILE <<\EOF
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#!/bin/sh
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# This script should be run under root permission
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EOF
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cat - > $TMPFILE <<\EOF
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echo ${CMD}
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${CMD}
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if test $? -ne 0
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then
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echo '*** FAIL:' ${CMD}
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exit 1
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fi
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EOF
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case $OS in
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"Linux")
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echo "CMD=\"$brctl addbr br0\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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N=0
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while test $N -lt $NrTaps
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do
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echo "CMD=\"$tunctl -t tap${N} -u ${SimhUser}\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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N=`expr $N + 1`
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done
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echo "CMD=\"$brctl addif br0 ${ACT_IF}\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"$brctl setfd br0 0\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"$ip link set ${ACT_IF} down\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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if ! test "$IPNR" = "not configured"
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then
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echo "CMD=\"$ip addr add ${IPNR} dev br0\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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fi
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if ! test "$IPNR" = "not configured"
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then
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## if test ! "x$DEFRT" = "x"
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## then
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## echo "CMD=\"$ip route del default via ${DEFRT} dev ${ACT_IF}\"" >> $JOBFILE
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## cat $TMPFILE >> $JOBFILE
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## fi
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echo "CMD=\"$ip addr del ${IPNR} dev ${ACT_IF}\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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fi
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echo "CMD=\"$ip link set ${ACT_IF} up\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"$ip link set br0 up\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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if test ! "x$DEFRT" = "x"
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then
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echo "CMD=\"$ip route add default via ${DEFRT} dev br0\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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fi
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ipfwd=`cat /proc/sys/net/ipv4/ip_forward`
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if test $IPFWD -ne $ipfwd
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then
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echo "CMD=\"echo ${IPFWD} > /proc/sys/net/ipv4/ip_forward\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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fi
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N=0
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while test $N -lt $NrTaps
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do
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echo "CMD=\"$brctl addif br0 tap${N}\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"$ip link set tap${N} up\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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N=`expr $N + 1`
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done
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BRIDGE="br0"
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EXAMPLE="tap:tap0"
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;;
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"FreeBSD")
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N=0
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while test $N -lt $NrTaps
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do
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echo "CMD=\"$ifconfig tap${N} create\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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N=`expr $N + 1`
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done
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echo "CMD=\"$sysctl net.link.tap.up_on_open=1\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"$ifconfig bridge0 create\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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case $NrTaps in
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1 )
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echo "CMD=\"$ifconfig bridge0 addm ${ACT_IF} addm tap0\"" >> $JOBFILE
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;;
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2 )
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echo "CMD=\"$ifconfig bridge0 addm ${ACT_IF} addm tap0 addm tap1\"" >> $JOBFILE
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;;
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3 )
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echo "CMD=\"$ifconfig bridge0 addm ${ACT_IF} addm tap0 addm tap1 addm tap2\"" >> $JOBFILE
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;;
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4 )
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echo "CMD=\"$ifconfig bridge0 addm ${ACT_IF} addm tap0 addm tap1 addm tap2 addm tap3\"" >> $JOBFILE
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;;
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* )
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echo "Sorry too many taps..."
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exit
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esac
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"$ifconfig bridge0 up\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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BRIDGE="bridge0"
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EXAMPLE="tap:tap0"
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;;
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"OpenBSD")
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N=0
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while test $N -lt $NrTaps
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do
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echo "CMD=\"$ifconfig tap${N} create\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"$ifconfig tap${N} up\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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N=`expr $N + 1`
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done
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echo "CMD=\"$ifconfig bridge0 create\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"$ifconfig bridge0 fwddelay 4\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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case $NrTaps in
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1 )
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echo "CMD=\"$ifconfig bridge0 add ${ACT_IF} add tap0\"" >> $JOBFILE
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;;
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2 )
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echo "CMD=\"$ifconfig bridge0 add ${ACT_IF} add tap0 add tap1\"" >> $JOBFILE
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;;
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3 )
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echo "CMD=\"$ifconfig bridge0 add ${ACT_IF} add tap0 add tap1 add tap2\"" >> $JOBFILE
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;;
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4 )
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echo "CMD=\"$ifconfig bridge0 add ${ACT_IF} add tap0 add tap1 add tap2 add tap3\"" >> $JOBFILE
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;;
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* )
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echo "Sorry too many taps..."
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exit
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esac
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"$ifconfig bridge0 up\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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BRIDGE="bridge0"
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EXAMPLE="tap:tap0"
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;;
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"NetBSD")
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N=0
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while test $N -lt $NrTaps
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do
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echo "CMD=\"$ifconfig tap${N} create\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"$ifconfig tap${N} up\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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N=`expr $N + 1`
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done
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echo "CMD=\"$ifconfig bridge0 create\"" >> $JOBFILE
|
|
cat $TMPFILE >> $JOBFILE
|
|
|
|
echo "CMD=\"$brconfig bridge0 fwddelay 1\"" >> $JOBFILE
|
|
cat $TMPFILE >> $JOBFILE
|
|
|
|
case $NrTaps in
|
|
1 )
|
|
echo "CMD=\"$brconfig bridge0 add ${ACT_IF} add tap0\"" >> $JOBFILE
|
|
;;
|
|
2 )
|
|
echo "CMD=\"$brconfig bridge0 add ${ACT_IF} add tap0 add tap1\"" >> $JOBFILE
|
|
;;
|
|
3 )
|
|
echo "CMD=\"$brconfig bridge0 add ${ACT_IF} add tap0 add tap1 add tap2\"" >> $JOBFILE
|
|
;;
|
|
4 )
|
|
echo "CMD=\"$brconfig bridge0 add ${ACT_IF} add tap0 add tap1 add tap2 add tap3\"" >> $JOBFILE
|
|
;;
|
|
* )
|
|
echo "Sorry too many taps..."
|
|
exit
|
|
esac
|
|
cat $TMPFILE >> $JOBFILE
|
|
|
|
echo "CMD=\"$brconfig bridge0 up\"" >> $JOBFILE
|
|
cat $TMPFILE >> $JOBFILE
|
|
|
|
BRIDGE="bridge0"
|
|
EXAMPLE="tap:tap0"
|
|
;;
|
|
esac
|
|
|
|
cat - >> $JOBFILE <<EOF
|
|
echo ""
|
|
echo 'Network reconfigured for use by SIMH simulators'
|
|
echo "Bridge ${BRIDGE} with accesspoint wired into interface ${ACT_IF}"
|
|
echo "Attach ethernet interface to ${EXAMPLE} in SIMH ini file."
|
|
echo ""
|
|
echo 'Use unique IPnrs on your SIMH hosts within the'
|
|
echo 'same network and set a default route if needed'
|
|
|
|
rm -f $JOBFILE
|
|
EOF
|
|
|
|
if test "X$OPSMODE" = "Xexpert"
|
|
then
|
|
echo ""
|
|
echo "-- To change the params above edit SnetSaved.$ACT_IF"
|
|
echo "-- and rerun this script before executing the job"
|
|
fi
|
|
|
|
L=`ls -l $JOBFILE | grep root | wc -l`
|
|
if test $L -gt 0
|
|
then
|
|
echo "Executing $JOBFILE ..."
|
|
echo -n "Proceed...? (y)/n "
|
|
read ANSWER
|
|
if test "x$ANSWER" = "xn"
|
|
then
|
|
echo "-- To execute: sh $JOBFILE"
|
|
exit 0
|
|
fi
|
|
sh ${JOBFILE}
|
|
else
|
|
echo ""
|
|
echo "-- Executing $JOBFILE requires root permission"
|
|
echo "-- Either use sudo or su to execute: sh $JOBFILE"
|
|
fi
|
|
|
|
rm -f $TMPFILE
|