mirror of
https://github.com/rcornwell/sims.git
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380 lines
7.9 KiB
Bash
Executable File
380 lines
7.9 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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# uncomment next line if you need more than one tap = run multiple SIMHs... edit the saved params file
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#OPSMODE="expert"
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PATH="/bin:/sbin:/etc:/usr/sbin:/usr/bin"
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export PATH
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# check brctl to exist
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L=`whereis brctl |
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awk -F: '{ print $2 }' |
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grep brctl |
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wc -l`
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if test $L -eq 0
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then
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echo 'No brctl program -- please install package bridge-utils'
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fi
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# check tunctl to exist
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LL=`whereis tunctl |
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awk -F: '{ print $2 }' |
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grep tunctl |
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wc -l`
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if test $LL -eq 0
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then
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echo 'No tunctl program -- please install package uml-utilities'
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fi
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# quit when either not installed
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if test $L -eq 0 -o $LL -eq 0
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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 | 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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# let user chose the interface he/she wants to usx
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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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L=`ip addr show $I |
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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=`ip addr show $I |
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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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L=`ip addr show $ACT_IF |
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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=`ip addr show dev $ACT_IF |
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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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IPBRO=`ip addr show dev $ACT_IF |
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grep inet |
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grep -v inet6 |
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sed '1s/^.*brd //' |
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sed '1s/[ ].*$//'`
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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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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 $2 }'`
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fi
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if test "x$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...... " $DEFRT
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fi
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if test "x$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 $IPFWD -eq 1
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then
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echo "IP forwarding is active........... " YES
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else
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echo "IP forwarding is active........... " NO
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fi
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# nr of taps the user wants or 1 for default
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if test "x${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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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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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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PATH="/bin:/sbin:/etc:/usr/sbin:/usr/bin"
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export PATH
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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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echo "CMD=\"ip link set ${ACT_IF} down\"" >> $JOBFILE
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cat $TMPFILE >> $JOBFILE
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echo "CMD=\"brctl addbr br0\"" >> $JOBFILE
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## echo "CMD=\"ip tuntap add mode tun name 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}\"" >> $JOBFILE
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## echo "CMD=\"ip tuntap add mode tap name tap${N} user ${SimhUser} dev br0\"" >> $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 >> $JOBFILE
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if ! test "$IPNR" = "not configured"
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then
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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 >> $JOBFILE
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if ! test "$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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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 del default via ${DEFRT} dev ${ACT_IF}\"" >> $JOBFILE
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## cat $TMPFILE >> $JOBFILE
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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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cat - >> $JOBFILE <<EOF
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echo ""
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echo 'Network reconfigured for use by SIMH simulators'
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echo "Bridge br0 with access tap0 wired into interface ${ACT_IF}"
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echo 'Configure tap:tap0 for your 1st SIMH host'
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echo ""
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echo 'Use unique IPnrs on your SIMH hosts within the'
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echo 'same network and set a default route if needed'
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rm -f $JOBFILE
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EOF
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if test "X$OPSMODE" = "Xexpert"
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then
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echo ""
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echo "-- To change the params above edit SnetSaved.$ACT_IF"
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echo "-- and rerun this script before executing the job"
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fi
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L=`ls -l $JOBFILE | grep root | wc -l`
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if test $L -gt 0
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then
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echo "Executing $JOBFILE ..."
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echo -n "Proceed...? (y)/n "
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read ANSWER
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if test "x$ANSWER" = "xn"
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then
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echo "-- To execute: bash $JOBFILE"
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exit 0
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fi
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bash ${JOBFILE}
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else
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echo ""
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echo "-- Executing $JOBFILE requires root permission"
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echo "-- Either use sudo or su to execute: bash $JOBFILE"
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fi
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rm -f $TMPFILE
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