mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 13:41:51 +00:00
samples: pktgen: add helper functions for IP(v4/v6) CIDR parsing
This commit adds CIDR parsing and IP validate helper function to parse single IP or range of IP with CIDR. (e.g. 198.18.0.0/15) Validating the address should be preceded prior to the parsing. Helpers will be used in prior to set target address in samples/pktgen. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel T. Lee
David S. Miller
parent
3cad8f9115
commit
f0681d95e7
@ -168,6 +168,137 @@ function get_node_cpus()
|
||||
echo $node_cpu_list
|
||||
}
|
||||
|
||||
# Check $1 is in between $2, $3 ($2 <= $1 <= $3)
|
||||
function in_between() { [[ ($1 -ge $2) && ($1 -le $3) ]] ; }
|
||||
|
||||
# Extend shrunken IPv6 address.
|
||||
# fe80::42:bcff:fe84:e10a => fe80:0:0:0:42:bcff:fe84:e10a
|
||||
function extend_addr6()
|
||||
{
|
||||
local addr=$1
|
||||
local sep=: sep2=::
|
||||
local sep_cnt=$(tr -cd $sep <<< $1 | wc -c)
|
||||
local shrink
|
||||
|
||||
# separator count should be (2 <= $sep_cnt <= 7)
|
||||
if ! (in_between $sep_cnt 2 7); then
|
||||
err 5 "Invalid IP6 address: $1"
|
||||
fi
|
||||
|
||||
# if shrink '::' occurs multiple, it's malformed.
|
||||
shrink=( $(egrep -o "$sep{2,}" <<< $addr) )
|
||||
if [[ ${#shrink[@]} -ne 0 ]]; then
|
||||
if [[ ${#shrink[@]} -gt 1 || ( ${shrink[0]} != $sep2 ) ]]; then
|
||||
err 5 "Invalid IP6 address: $1"
|
||||
fi
|
||||
fi
|
||||
|
||||
# add 0 at begin & end, and extend addr by adding :0
|
||||
[[ ${addr:0:1} == $sep ]] && addr=0${addr}
|
||||
[[ ${addr: -1} == $sep ]] && addr=${addr}0
|
||||
echo "${addr/$sep2/$(printf ':0%.s' $(seq $[8-sep_cnt])):}"
|
||||
}
|
||||
|
||||
# Given a single IP(v4/v6) address, whether it is valid.
|
||||
function validate_addr()
|
||||
{
|
||||
# check function is called with (funcname)6
|
||||
[[ ${FUNCNAME[1]: -1} == 6 ]] && local IP6=6
|
||||
local bitlen=$[ IP6 ? 128 : 32 ]
|
||||
local len=$[ IP6 ? 8 : 4 ]
|
||||
local max=$[ 2**(len*2)-1 ]
|
||||
local net prefix
|
||||
local addr sep
|
||||
|
||||
IFS='/' read net prefix <<< $1
|
||||
[[ $IP6 ]] && net=$(extend_addr6 $net)
|
||||
|
||||
# if prefix exists, check (0 <= $prefix <= $bitlen)
|
||||
if [[ -n $prefix ]]; then
|
||||
if ! (in_between $prefix 0 $bitlen); then
|
||||
err 5 "Invalid prefix: /$prefix"
|
||||
fi
|
||||
fi
|
||||
|
||||
# set separator for each IP(v4/v6)
|
||||
[[ $IP6 ]] && sep=: || sep=.
|
||||
IFS=$sep read -a addr <<< $net
|
||||
|
||||
# array length
|
||||
if [[ ${#addr[@]} != $len ]]; then
|
||||
err 5 "Invalid IP$IP6 address: $1"
|
||||
fi
|
||||
|
||||
# check each digit (0 <= $digit <= $max)
|
||||
for digit in "${addr[@]}"; do
|
||||
[[ $IP6 ]] && digit=$[ 16#$digit ]
|
||||
if ! (in_between $digit 0 $max); then
|
||||
err 5 "Invalid IP$IP6 address: $1"
|
||||
fi
|
||||
done
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
function validate_addr6() { validate_addr $@ ; }
|
||||
|
||||
# Given a single IP(v4/v6) or CIDR, return minimum and maximum IP addr.
|
||||
function parse_addr()
|
||||
{
|
||||
# check function is called with (funcname)6
|
||||
[[ ${FUNCNAME[1]: -1} == 6 ]] && local IP6=6
|
||||
local net prefix
|
||||
local min_ip max_ip
|
||||
|
||||
IFS='/' read net prefix <<< $1
|
||||
[[ $IP6 ]] && net=$(extend_addr6 $net)
|
||||
|
||||
if [[ -z $prefix ]]; then
|
||||
min_ip=$net
|
||||
max_ip=$net
|
||||
else
|
||||
# defining array for converting Decimal 2 Binary
|
||||
# 00000000 00000001 00000010 00000011 00000100 ...
|
||||
local d2b='{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}'
|
||||
[[ $IP6 ]] && d2b+=$d2b
|
||||
eval local D2B=($d2b)
|
||||
|
||||
local bitlen=$[ IP6 ? 128 : 32 ]
|
||||
local remain=$[ bitlen-prefix ]
|
||||
local octet=$[ IP6 ? 16 : 8 ]
|
||||
local min_mask max_mask
|
||||
local min max
|
||||
local ip_bit
|
||||
local ip sep
|
||||
|
||||
# set separator for each IP(v4/v6)
|
||||
[[ $IP6 ]] && sep=: || sep=.
|
||||
IFS=$sep read -ra ip <<< $net
|
||||
|
||||
min_mask="$(printf '1%.s' $(seq $prefix))$(printf '0%.s' $(seq $remain))"
|
||||
max_mask="$(printf '0%.s' $(seq $prefix))$(printf '1%.s' $(seq $remain))"
|
||||
|
||||
# calculate min/max ip with &,| operator
|
||||
for i in "${!ip[@]}"; do
|
||||
digit=$[ IP6 ? 16#${ip[$i]} : ${ip[$i]} ]
|
||||
ip_bit=${D2B[$digit]}
|
||||
|
||||
idx=$[ octet*i ]
|
||||
min[$i]=$[ 2#$ip_bit & 2#${min_mask:$idx:$octet} ]
|
||||
max[$i]=$[ 2#$ip_bit | 2#${max_mask:$idx:$octet} ]
|
||||
[[ $IP6 ]] && { min[$i]=$(printf '%X' ${min[$i]});
|
||||
max[$i]=$(printf '%X' ${max[$i]}); }
|
||||
done
|
||||
|
||||
min_ip=$(IFS=$sep; echo "${min[*]}")
|
||||
max_ip=$(IFS=$sep; echo "${max[*]}")
|
||||
fi
|
||||
|
||||
echo $min_ip $max_ip
|
||||
}
|
||||
|
||||
function parse_addr6() { parse_addr $@ ; }
|
||||
|
||||
# Given a single or range of port(s), return minimum and maximum port number.
|
||||
function parse_ports()
|
||||
{
|
||||
@ -190,9 +321,9 @@ function validate_ports()
|
||||
local min_port=$1
|
||||
local max_port=$2
|
||||
|
||||
# 0 < port < 65536
|
||||
if [[ $min_port -gt 0 && $min_port -lt 65536 ]]; then
|
||||
if [[ $max_port -gt 0 && $max_port -lt 65536 ]]; then
|
||||
# 1 <= port <= 65535
|
||||
if (in_between $min_port 1 65535); then
|
||||
if (in_between $max_port 1 65535); then
|
||||
if [[ $min_port -le $max_port ]]; then
|
||||
return 0
|
||||
fi
|
||||
|
||||
Loading…
Reference in New Issue
Block a user