| 1 | #!/bin/bash |
| 2 | # $Id$ |
| 3 | iptables="/sbin/iptables" |
| 4 | iptablesrestore="/sbin/iptables-restore" |
| 5 | ifconfig="/sbin/ifconfig" |
| 6 | grep="/bin/grep" |
| 7 | cut="/usr/bin/cut" |
| 8 | ipcalc="/usr/bin/ipcalc" |
| 9 | |
| 10 | #pimp files must be generated by optional-tools/make-pimp utility |
| 11 | pimp_2way_nat="/dev/shm/pimp-2way-nat.tmp" |
| 12 | pimp_snat="/dev/shm/pimp-snat.tmp" |
| 13 | etchosts="/mnt/mtdblock0/hosts" |
| 14 | restoretmp="/dev/shm/iptables-restore.tmp" |
| 15 | restoredata="/mnt/mtdblock0/iptables-restore.in" |
| 16 | wan1="vlan770" |
| 17 | wan2="vlan771" |
| 18 | wan3="vlan772" |
| 19 | wan4="vlan774" |
| 20 | czffirstbitmask="19" |
| 21 | czfsecondbitmask="22" |
| 22 | czfthirdbitmask="25" |
| 23 | czffourthbitmask="28" |
| 24 | pubfirstbitmask="26" |
| 25 | pubsecondbitmask="29" |
| 26 | chaintrack="_" |
| 27 | |
| 28 | echo "*nat" > $restoretmp |
| 29 | echo ":PREROUTING ACCEPT [0:0]" >> $restoretmp |
| 30 | echo ":POSTROUTING ACCEPT [0:0]" >> $restoretmp |
| 31 | echo ":OUTPUT ACCEPT [0:0]" >> $restoretmp |
| 32 | |
| 33 | # =============================================================== |
| 34 | # Symetrical SNAT-DNAT using indexed iptables |
| 35 | # =============================================================== |
| 36 | echo -n "Generating new iptables-restore data - two way SNAT/DNAT " |
| 37 | |
| 38 | for czfip in `$grep -v ^# $pimp_2way_nat|$cut -f 1 -d " "` |
| 39 | do |
| 40 | pubip=`$grep "$czfip " $pimp_2way_nat|$cut -f 2 -d " "` |
| 41 | czffirstindex=priv_`$ipcalc -n $czfip/$czffirstbitmask|$grep Network|$cut -f 4 -d \ |tr [./] _` |
| 42 | czfsecondindex=priv_`$ipcalc -n $czfip/$czfsecondbitmask|$grep Network|$cut -f 4 -d \ |tr [./] _` |
| 43 | czfthirdindex=priv_`$ipcalc -n $czfip/$czfthirdbitmask|$grep Network|$cut -f 4 -d \ |tr [./] _` |
| 44 | czffourthindex=priv_`$ipcalc -n $czfip/$czffourthbitmask|$grep Network|$cut -f 4 -d \ |tr [./] _` |
| 45 | pubfirstindex=pub_`$ipcalc -n $pubip/$pubfirstbitmask|$grep Network|$cut -f 4 -d \ |tr [./] _` |
| 46 | pubsecondindex=pub_`$ipcalc -n $pubip/$pubsecondbitmask|$grep Network|$cut -f 4 -d \ |tr [./] _` |
| 47 | |
| 48 | if ! [[ "$chaintrack" == *"$czffirstindex"* ]] |
| 49 | then |
| 50 | echo :$czffirstindex "- [0:0]" >> $restoretmp |
| 51 | s=`$ipcalc -n $czfip/$czffirstbitmask|$grep Network|$cut -f 4 -d \ ` |
| 52 | echo -A POSTROUTING -d ! 10.0.0.0/8 -s $s -o $wan1 -j $czffirstindex >> $restoretmp |
| 53 | echo -A POSTROUTING -d ! 10.0.0.0/8 -s $s -o $wan2 -j $czffirstindex >> $restoretmp |
| 54 | echo -A POSTROUTING -d ! 10.0.0.0/8 -s $s -o $wan3 -j $czffirstindex >> $restoretmp |
| 55 | echo -A POSTROUTING -d ! 10.0.0.0/8 -s $s -o $wan4 -j $czffirstindex >> $restoretmp |
| 56 | chaintrack=\ ${czffirstindex}\ ${chaintrack} |
| 57 | fi |
| 58 | |
| 59 | if ! [[ "$chaintrack" == *"$czfsecondindex"* ]] |
| 60 | then |
| 61 | echo :$czfsecondindex "- [0:0]" >> $restoretmp |
| 62 | s=`$ipcalc -n $czfip/$czfsecondbitmask|$grep Network|$cut -f 4 -d \ ` |
| 63 | echo -A $czffirstindex -s $s -o $wan1 -j $czfsecondindex >> $restoretmp |
| 64 | echo -A $czffirstindex -s $s -o $wan2 -j $czfsecondindex >> $restoretmp |
| 65 | echo -A $czffirstindex -s $s -o $wan3 -j $czfsecondindex >> $restoretmp |
| 66 | echo -A $czffirstindex -s $s -o $wan4 -j $czfsecondindex >> $restoretmp |
| 67 | chaintrack=\ ${czfsecondindex}\ ${chaintrack} |
| 68 | fi |
| 69 | |
| 70 | if ! [[ "$chaintrack" == *"$czfthirdindex"* ]] |
| 71 | then |
| 72 | echo :$czfthirdindex "- [0:0]" >> $restoretmp |
| 73 | s=`$ipcalc -n $czfip/$czfthirdbitmask|$grep Network|$cut -f 4 -d \ ` |
| 74 | echo -A $czfsecondindex -s $s -o $wan1 -j $czfthirdindex >> $restoretmp |
| 75 | echo -A $czfsecondindex -s $s -o $wan2 -j $czfthirdindex >> $restoretmp |
| 76 | echo -A $czfsecondindex -s $s -o $wan3 -j $czfthirdindex >> $restoretmp |
| 77 | echo -A $czfsecondindex -s $s -o $wan4 -j $czfthirdindex >> $restoretmp |
| 78 | chaintrack=\ ${czfthirdindex}\ ${chaintrack} |
| 79 | fi |
| 80 | |
| 81 | if ! [[ "$chaintrack" == *"$czffourthindex"* ]] |
| 82 | then |
| 83 | echo :$czffourthindex "- [0:0]" >> $restoretmp |
| 84 | s=`$ipcalc -n $czfip/$czffourthbitmask|$grep Network|$cut -f 4 -d \ ` |
| 85 | echo -A $czfthirdindex -s $s -o $wan1 -j $czffourthindex >> $restoretmp |
| 86 | echo -A $czfthirdindex -s $s -o $wan2 -j $czffourthindex >> $restoretmp |
| 87 | echo -A $czfthirdindex -s $s -o $wan3 -j $czffourthindex >> $restoretmp |
| 88 | echo -A $czfthirdindex -s $s -o $wan4 -j $czffourthindex >> $restoretmp |
| 89 | chaintrack=\ ${czffourthindex}\ ${chaintrack} |
| 90 | fi |
| 91 | |
| 92 | if ! [[ "$chaintrack" == *"$pubfirstindex"* ]] |
| 93 | then |
| 94 | echo :$pubfirstindex "- [0:0]" >> $restoretmp |
| 95 | s=`$ipcalc -n $pubip/$pubfirstbitmask|$grep Network|$cut -f 4 -d \ ` |
| 96 | echo -A PREROUTING -i $wan1 -d $s -j $pubfirstindex >> $restoretmp |
| 97 | echo -A PREROUTING -i $wan2 -d $s -j $pubfirstindex >> $restoretmp |
| 98 | echo -A PREROUTING -i $wan3 -d $s -j $pubfirstindex >> $restoretmp |
| 99 | echo -A PREROUTING -i $wan4 -d $s -j $pubfirstindex >> $restoretmp |
| 100 | chaintrack=\ ${pubfirstindex}\ ${chaintrack} |
| 101 | fi |
| 102 | |
| 103 | if ! [[ "$chaintrack" == *"$pubsecondindex"* ]] |
| 104 | then |
| 105 | echo :$pubsecondindex "- [0:0]" >> $restoretmp |
| 106 | s=`$ipcalc -n $pubip/$pubsecondbitmask|$grep Network|$cut -f 4 -d \ ` |
| 107 | echo -A $pubfirstindex -i $wan1 -d $s -j $pubsecondindex >> $restoretmp |
| 108 | echo -A $pubfirstindex -i $wan2 -d $s -j $pubsecondindex >> $restoretmp |
| 109 | echo -A $pubfirstindex -i $wan3 -d $s -j $pubsecondindex >> $restoretmp |
| 110 | echo -A $pubfirstindex -i $wan4 -d $s -j $pubsecondindex >> $restoretmp |
| 111 | chaintrack=\ ${pubsecondindex}\ ${chaintrack} |
| 112 | fi |
| 113 | |
| 114 | echo -A $pubsecondindex -i $wan1 -d $pubip/32 -j DNAT --to-destination $czfip >> $restoretmp |
| 115 | echo -A $pubsecondindex -i $wan2 -d $pubip/32 -j DNAT --to-destination $czfip >> $restoretmp |
| 116 | echo -A $pubsecondindex -i $wan3 -d $pubip/32 -j DNAT --to-destination $czfip >> $restoretmp |
| 117 | echo -A $pubsecondindex -i $wan4 -d $pubip/32 -j DNAT --to-destination $czfip >> $restoretmp |
| 118 | |
| 119 | echo -A $czffourthindex -s $czfip/32 -o $wan1 -j SNAT --to-source $pubip >> $restoretmp |
| 120 | echo -A $czffourthindex -s $czfip/32 -o $wan2 -j SNAT --to-source $pubip >> $restoretmp |
| 121 | echo -A $czffourthindex -s $czfip/32 -o $wan3 -j SNAT --to-source $pubip >> $restoretmp |
| 122 | echo -A $czffourthindex -s $czfip/32 -o $wan4 -j SNAT --to-source $pubip >> $restoretmp |
| 123 | |
| 124 | echo -n . |
| 125 | |
| 126 | done |
| 127 | echo " done." |
| 128 | |
| 129 | # =============================================================== |
| 130 | # SNAT only using indexed iptables (should be rather function, hmm) |
| 131 | # =============================================================== |
| 132 | echo -n "Generating new iptables-restore data - one way SNAT " |
| 133 | |
| 134 | for czfip in `$grep -v ^# $pimp_snat|$cut -f 1 -d " "` |
| 135 | do |
| 136 | pubip=`$grep "$czfip " $pimp_snat|$cut -f 2 -d " "` |
| 137 | czffirstindex=priv_`$ipcalc -n $czfip/$czffirstbitmask|$grep Network|$cut -f 4 -d \ |tr [./] _` |
| 138 | czfsecondindex=priv_`$ipcalc -n $czfip/$czfsecondbitmask|$grep Network|$cut -f 4 -d \ |tr [./] _` |
| 139 | czfthirdindex=priv_`$ipcalc -n $czfip/$czfthirdbitmask|$grep Network|$cut -f 4 -d \ |tr [./] _` |
| 140 | czffourthindex=priv_`$ipcalc -n $czfip/$czffourthbitmask|$grep Network|$cut -f 4 -d \ |tr [./] _` |
| 141 | |
| 142 | if ! [[ "$chaintrack" == *"$czffirstindex"* ]] |
| 143 | then |
| 144 | echo :$czffirstindex "- [0:0]" >> $restoretmp |
| 145 | s=`$ipcalc -n $czfip/$czffirstbitmask|$grep Network|$cut -f 4 -d \ ` |
| 146 | echo -A POSTROUTING -d ! 10.0.0.0/8 -s $s -o $wan1 -j $czffirstindex >> $restoretmp |
| 147 | echo -A POSTROUTING -d ! 10.0.0.0/8 -s $s -o $wan2 -j $czffirstindex >> $restoretmp |
| 148 | echo -A POSTROUTING -d ! 10.0.0.0/8 -s $s -o $wan3 -j $czffirstindex >> $restoretmp |
| 149 | echo -A POSTROUTING -d ! 10.0.0.0/8 -s $s -o $wan4 -j $czffirstindex >> $restoretmp |
| 150 | chaintrack=\ ${czffirstindex}\ ${chaintrack} |
| 151 | fi |
| 152 | |
| 153 | if ! [[ "$chaintrack" == *"$czfsecondindex"* ]] |
| 154 | then |
| 155 | echo :$czfsecondindex "- [0:0]" >> $restoretmp |
| 156 | s=`$ipcalc -n $czfip/$czfsecondbitmask|$grep Network|$cut -f 4 -d \ ` |
| 157 | echo -A $czffirstindex -s $s -o $wan1 -j $czfsecondindex >> $restoretmp |
| 158 | echo -A $czffirstindex -s $s -o $wan2 -j $czfsecondindex >> $restoretmp |
| 159 | echo -A $czffirstindex -s $s -o $wan3 -j $czfsecondindex >> $restoretmp |
| 160 | echo -A $czffirstindex -s $s -o $wan4 -j $czfsecondindex >> $restoretmp |
| 161 | chaintrack=\ ${czfsecondindex}\ ${chaintrack} |
| 162 | fi |
| 163 | |
| 164 | if ! [[ "$chaintrack" == *"$czfthirdindex"* ]] |
| 165 | then |
| 166 | echo :$czfthirdindex "- [0:0]" >> $restoretmp |
| 167 | s=`$ipcalc -n $czfip/$czfthirdbitmask|$grep Network|$cut -f 4 -d \ ` |
| 168 | echo -A $czfsecondindex -s $s -o $wan1 -j $czfthirdindex >> $restoretmp |
| 169 | echo -A $czfsecondindex -s $s -o $wan2 -j $czfthirdindex >> $restoretmp |
| 170 | echo -A $czfsecondindex -s $s -o $wan3 -j $czfthirdindex >> $restoretmp |
| 171 | echo -A $czfsecondindex -s $s -o $wan4 -j $czfthirdindex >> $restoretmp |
| 172 | chaintrack=\ ${czfthirdindex}\ ${chaintrack} |
| 173 | fi |
| 174 | |
| 175 | if ! [[ "$chaintrack" == *"$czffourthindex"* ]] |
| 176 | then |
| 177 | echo :$czffourthindex "- [0:0]" >> $restoretmp |
| 178 | s=`$ipcalc -n $czfip/$czffourthbitmask|$grep Network|$cut -f 4 -d \ ` |
| 179 | echo -A $czfthirdindex -s $s -o $wan1 -j $czffourthindex >> $restoretmp |
| 180 | echo -A $czfthirdindex -s $s -o $wan2 -j $czffourthindex >> $restoretmp |
| 181 | echo -A $czfthirdindex -s $s -o $wan3 -j $czffourthindex >> $restoretmp |
| 182 | echo -A $czfthirdindex -s $s -o $wan4 -j $czffourthindex >> $restoretmp |
| 183 | chaintrack=\ ${czffourthindex}\ ${chaintrack} |
| 184 | fi |
| 185 | |
| 186 | echo -A $czffourthindex -s $czfip/32 -o $wan1 -j SNAT --to-source $pubip >> $restoretmp |
| 187 | echo -A $czffourthindex -s $czfip/32 -o $wan2 -j SNAT --to-source $pubip >> $restoretmp |
| 188 | echo -A $czffourthindex -s $czfip/32 -o $wan3 -j SNAT --to-source $pubip >> $restoretmp |
| 189 | echo -A $czffourthindex -s $czfip/32 -o $wan4 -j SNAT --to-source $pubip >> $restoretmp |
| 190 | |
| 191 | echo -n . |
| 192 | done |
| 193 | echo " done." |
| 194 | |
| 195 | echo COMMIT >> $restoretmp |
| 196 | echo -n "Writing $restoredata" |
| 197 | mv $restoretmp $restoredata |