diff options
author | Manuel Munz <freifunk@somakoma.de> | 2011-09-23 19:23:18 +0000 |
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committer | Manuel Munz <freifunk@somakoma.de> | 2011-09-23 19:23:18 +0000 |
commit | d8e4734b23016cea5c5099f84a7f2ffbab8e6216 (patch) | |
tree | cb1f06928a006357b7e0a532dd0765dc76ffc87d /contrib/package/freifunk-gwcheck/files | |
parent | 9ed39e1431395bb84c486df94bc0a3660d7f0936 (diff) |
contrib/package: Add freifunk-gwcheck to replace the gateway-check in modules/freifunk
Diffstat (limited to 'contrib/package/freifunk-gwcheck/files')
-rw-r--r-- | contrib/package/freifunk-gwcheck/files/etc/config/freifunk-gwcheck | 5 | ||||
-rwxr-xr-x | contrib/package/freifunk-gwcheck/files/usr/sbin/ff_olsr_test_gw.sh | 82 |
2 files changed, 87 insertions, 0 deletions
diff --git a/contrib/package/freifunk-gwcheck/files/etc/config/freifunk-gwcheck b/contrib/package/freifunk-gwcheck/files/etc/config/freifunk-gwcheck new file mode 100644 index 000000000..382747e20 --- /dev/null +++ b/contrib/package/freifunk-gwcheck/files/etc/config/freifunk-gwcheck @@ -0,0 +1,5 @@ +config 'gwcheck' 'hosts' + list 'host' 'augsburg.freifunk.net' + list 'host' 'vpn4.leipzig.freifunk.net' + list 'host' 'luci.subsignal.org' + list 'host' 'conntest.jpod.cc' diff --git a/contrib/package/freifunk-gwcheck/files/usr/sbin/ff_olsr_test_gw.sh b/contrib/package/freifunk-gwcheck/files/usr/sbin/ff_olsr_test_gw.sh new file mode 100755 index 000000000..5d34d9a55 --- /dev/null +++ b/contrib/package/freifunk-gwcheck/files/usr/sbin/ff_olsr_test_gw.sh @@ -0,0 +1,82 @@ +#!/bin/sh + +#check if dyngw_plain is installed and enabled, else exit +dyngwplainlib=`uci show olsrd |grep dyn_gw_plain |awk {' FS="."; print $1"."$2 '}` +if [ -n "$dyngwplainlib" ]; then + if [ ! "$(uci -q get $dyngwplainlib.ignore)" == 0 ]; then + exit 1 + fi +else + echo "dyngw_plain not found in olsrd config, exit" + exit 1 +fi + + +# check if we have a defaultroute with metric=0 in one of these tables: main table and gw-check table. +# If not exit here. +defroutemain="$(ip r s |grep default |grep -v metric)" +defroutegw-check="$(ip r s t gw-check |grep default |grep -v metric)" +if [ -z "$defroutegw-check" -a -z "$defroutemain" ]; then + exit 1 +fi + +# get and shuffle list of testservers +testserver="$(uci -q get freifunk-gwcheck.hosts.host)" +[ -z "$testserver" ] && echo "No testservers found, exit" && exit + +testserver="$(for t in $testserver; do echo $t; done | awk 'BEGIN { + srand(); +} +{ + l[NR] = $0; +} + +END { + for (i = 1; i <= NR; i++) { + n = int(rand() * (NR - i + 1)) + i; + print l[n]; + l[n] = l[i]; + } +}')" + +check_internet() { + for t in $testserver; do + local test + test=$(wget -q http://$t/conntest.html -O -| grep "Internet_works") + if [ "$test" == "Internet_works" ]; then + echo 0 + break + else + logger -t gw-check "Could not get test file from http://$t/conntest.html" + fi + done +} + +iw=$(check_internet) + +if [ "$iw" == 0 ]; then + # check if we have a seperate routing table for our tests. + # If yes, move defaultroute to normal table and delete table gw-check + if [ -n "$defroutegw-check" ]; then + ip r a $defroutegw-check + ip r d $defroutegw-check t gw-check + ip ru del fwmark 0x2 lookup gw-check + for host in $testserver; do + iptables -t mangle -D OUTPUT -d $host -p tcp --dport 80 -j MARK --set-mark 0x2 + done + logger -t gw-check "Internet is available again, restoring default route ( $defroutegw-check)" + fi + +else + # Check failed. If we have a defaultroute with metric=0 and it is already in table gw-check then do nothing. + # If there is a defaultroute with metric=0 then remove it from the main routing table and add to table gw-check. + if [ -z "$(ip ru s | grep gw-check)" -a -n "$defroutemain" ]; then + ip rule add fwmark 0x2 lookup gw-check + for host in $testserver; do + iptables -t mangle -I OUTPUT -d $host -p tcp --dport 80 -j MARK --set-mark 0x2 + done + ip r a $defroutemain table gw-check + ip r d $defroutemain + logger -t gw-check "Internet is not available, deactivating the default route ( $defroutemain)" + fi +fi |