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udhcpc: add cidr routes support (patch from #5299)

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SVN-Revision: 16433
This commit is contained in:
Felix Fietkau 2009-06-13 14:42:47 +00:00
parent c90052be54
commit d196e4087e
2 changed files with 92 additions and 0 deletions
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74
package/base-files/files/usr/share/udhcpc/default.script
View file

@ -62,6 +62,80 @@ setup_interface () {
change_state network "$ifc" gateway "$router"
}
# CIDR STATIC ROUTES (rfc3442)
[ -n "$cidrroute" ] && {
# This defines how many CIDR Routes can be assigned so that we do not enter
# an endless loop on malformed data
MAXCIDRROUTES=24;
while [ ${MAXCIDRROUTES} -gt "0" ]; do
# Format is
# $MASK $NW $GW
# $NW == AAA.BBB.CCC.DDD
# $GW == EEE.FFF.CCC.DDD
# $MASK AAA.[BBB].[CCC].[DDD] EEE.FFF.GGG.HHH
# 1 2 3 4 5 6 7 8 9
MASK=$(echo $cidrroute | awk '{ print $1 }')
if [ ${MASK} = "0" ] ; then
# $MASK EEE.FFF.GGG.HHH
# 1 2 3 5 6
NW="0"
GW=$(echo $cidrroute | awk '{ print $2"."$3"."$4"."$5 }' )
elif [ ${MASK} -le "8" ] ; then
# $MASK AAA EEE.FFF.GGG.HHH
# 1 2 3 5 6 7
NW=$(echo $cidrroute | awk '{ print $2 }' )
GW=$(echo $cidrroute | awk '{ print $3"."$4"."$5"."$6 }' )
elif [ ${MASK} -le "16" ] ; then
# $MASK AAA.BBB EEE.FFF.GGG.HHH
# 1 2 3 5 6 7 8
NW=$(echo $cidrroute | awk '{ print $2"."$3 }' )
GW=$(echo $cidrroute | awk '{ print $4"."$5"."$6"."$7 }' )
elif [ ${MASK} -le "24" ] ; then
# $MASK AAA.BBB.CCC EEE.FFF.GGG.HHH
# 1 2 3 4 5 6 7 8
NW=$(echo $cidrroute | awk '{ print $2"."$3"."$4 }' )
GW=$(echo $cidrroute | awk '{ print $5"."$6"."$7"."$8 }' )
else
# $MASK AAA.BBB.CCC.DDD EEE.FFF.GGG.HHH
# 1 2 3 4 5 6 7 8 9
NW=$(echo $cidrroute | awk '{ print $2"."$3"."$4"."$5 }' )
GW=$(echo $cidrroute | awk '{ print $6"."$7"."$8"."$9 }' )
fi
echo [$ROUTECOUNTER] Route Network: $NW/$MASK Gateway: $GW on $interface
# TODO: Check for malformed data here to eliminate counter workaround
# Malformed data is: ... or xxx... or xxx.yyy.. or xxx.yyy.zzz.
[ -n "$NW" ] && [ -n "$GW" ] && {
route add $NW gw $GW dev $interface
}
# Clear the strings incase they don't get set next time around
if [ ${NW} = "0" ]; then
NW=""
fi
TMP="$MASK $NW $GW "
NW=""
GW=""
# Remove the '.' so that we can delete them from the input with sed
TMP=$(echo $TMP | sed "s/\./ /g")
# Remove the previous entry from cidrroute
cidrroute=$(echo $cidrroute | sed "s/$TMP//g")
# Add to counter
let ROUTECOUNTER=$ROUTECOUNTER+1;
let MAXCIDRROUTES=$MAXCIDRROUTES-1;
# Leave the loop if cidrroutes is empty (we've parsed everything)
[ ! -n "$cidrroute" ] && break
done
echo "done."
}
# DNS
config_get old_dns "$ifc" dns

18
package/busybox/patches/244-udhcpc_cidrroute.patch Normal file
View file

@ -0,0 +1,18 @@
--- a/networking/udhcp/options.c
+++ b/networking/udhcp/options.c
@@ -46,6 +46,7 @@ const struct dhcp_option dhcp_options[]
#if ENABLE_FEATURE_UDHCP_RFC3397
{ OPTION_STR1035 | OPTION_LIST , 0x77 }, /* search */
#endif
+ { OPTION_U8 | OPTION_LIST | OPTION_REQ, 0x79 }, /* cidr_static_routes */
/* MSIE's "Web Proxy Autodiscovery Protocol" support */
{ OPTION_STRING , 0xfc }, /* wpad */
@@ -95,6 +96,7 @@ const char dhcp_option_strings[] ALIGN1
#if ENABLE_FEATURE_UDHCP_RFC3397
"search" "\0"
#endif
+ "cidrroute" "\0" /* cidr_static_routes */
/* MSIE's "Web Proxy Autodiscovery Protocol" support */
"wpad" "\0"
;