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Update dhcp option 125 parsing logic

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Suvendhu Hansa 2023-07-11 03:29:28 +00:00 • committed by Vivek Kumar Dutta
parent 5635e79d23
commit bd76686d11
1 changed files with 10 additions and 4 deletions
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14
files/etc/udhcpc.user.d/udhcpc_icwmp_opt125.user
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@ -58,6 +58,10 @@ get_vivsoi() {
# read the length of enterprise data # read the length of enterprise data
len_val=${data:8:2} len_val=${data:8:2}
data_len=$(printf "%d\n" "0x$len_val")
# add 4 byte for ent_id and 1 byte for len
data_len=$(( data_len * 2 + 10 ))
opt_len=$(printf "%d\n" "0x$len_val") opt_len=$(printf "%d\n" "0x$len_val")
[ $opt_len -eq 0 ] && return [ $opt_len -eq 0 ] && return
@ -93,14 +97,16 @@ get_vivsoi() {
# add 2 bytes for sub_opt id and sub_opt len field # add 2 bytes for sub_opt id and sub_opt len field
sub_opt_end=$(( sub_opt_len + 4 )) sub_opt_end=$(( sub_opt_len + 4 ))
# fetch next sub option hex string
sub_data=${sub_data:${sub_opt_end}:${sub_data_len}}
# update the remaining sub option hex string length # update the remaining sub option hex string length
sub_data_len=$((sub_data_len - sub_opt_end)) sub_data_len=$((sub_data_len - sub_opt_end))
# fetch next sub option hex string
sub_data=${sub_data:${sub_opt_end}:${sub_data_len}}
done done
break # move ahead data to next enterprise id
data=${data:"${data_len}":"${rem_len}"}
rem_len=$(( rem_len - data_len ))
done done
} }