网上都是关于IPv6补全的，今天我提供一下IPv6完成简写的方法，如下：
sh解析器：
#!/bin/sh
function expand_ipv6() {
# input: ::
# output: 0:0:0:0:0:0:0:0
# input: 2001:2d:1f::1
# output: 2001:2d:1f:0:0:0:0:1
local ipv6=${1}
local colon_num=$(echo ${ipv6} | awk '{print gsub(/:/, "")}')
local replace_str=""
local i=0
while [ $colon_num -lt 7 ]
do
replace_str="${replace_str}:0"
colon_num=`expr $colon_num + 1`
done
replace_str="${replace_str}:"
local ipv6_expanded=${ipv6/::/$replace_str}
[[ ${ipv6_expanded} == *: ]] && ipv6_expanded="${ipv6_expanded}0"
[[ ${ipv6_expanded} == :* ]] && ipv6_expanded="0${ipv6_expanded}"
echo ${ipv6_expanded}
}
function expand_expanded_ipv6() {
# input: 0:0:0:0:0:0:0:0
# output: 0000:0000:0000:0000:0000:0000:0000:0000
# input: 2001:2d:1f:0:0:0:0:1
# output: 2001:002d:001f:0000:0000:0000:0000:0001
expanded_ipv6=${1}
x=${expanded_ipv6//:/ }
set $x
local j=0
local hex_arr=""
for i in "$@"
do
j=`expr $j + 1`
if [ ${#i} -eq 1 ]
then
hex_arr="${hex_arr}:000${i}"
continue
fi
if [ ${#i} -eq 2 ]
then
hex_arr="${hex_arr}:00${i}"
continue
fi
if [ ${#i} -eq 3 ]
then
hex_arr="${hex_arr}:0${i}"
continue
fi
hex_arr="${hex_arr}:${i}"
done
echo $hex_arr | sed 's/^.//'
}
function simple_ipv6() {
# input: 2000:002d:001f:0000:0000:0000:0000:0001
# output: 2000:2d:1f::1
local expanded_ipv6=${1}
x=${expanded_ipv6//:/ }
set $x
local j=1
local replace_str=""
local m=0
local n=0
local k=1
for i in "$@"
do
local tmp=$i
if [ "$tmp"x == "0000"x ]
then
j=`expr $j + 1`
eval tmp=\$$j
if [ "$tmp"x == "0000"x ]
then
m=$j
echo "m is:$m"
break
fi
j=`expr $j - 1`
fi
j=`expr $j + 1`
done
j=1
for i in "$@"
do
local tmp=$i
if [ "$tmp"x == "0000"x ]
then
j=`expr $j + 1`
eval tmp=\$$j
if [ "$tmp"x == "0000"x ]
then
j=`expr $j + 1`
eval tmp=\$$j
if [ "$tmp"x != "0000"x ]
then
n=$j
echo "n is:$n"
break
fi
j=`expr $j - 1`
fi
j=`expr $j - 1`
fi
j=`expr $j + 1`
done
for i in "$@"
do
new_str=$(echo -e $i | sed -r 's/0*([0-9])/\1/')
tmp1=`expr $m - 1`
tmp2=`expr $m - 2`
tmp3=`expr $n - 1`
if [ $k -lt $tmp1 ]
then
replace_str="${replace_str}${new_str}:"
fi
if [ $k -eq $tmp2 ]
then
replace_str="${replace_str}:"
fi
if [ $k -ge $tmp3 ]
then
replace_str="${replace_str}${new_str}:"
fi
k=`expr $k + 1`
done
echo $replace_str | sed 's/.$//'
}
expand_ipv6 $1
expand_expanded_ipv6 $(expand_ipv6 $1)
simple_ipv6 $(expand_expanded_ipv6 $(expand_ipv6 $1))
bash解析器：
#!/usr/bin/env bash
function expand_ipv6() {
# input: ::
# output: 0:0:0:0:0:0:0:0
# input: 2001:2d:1f::1
# output: 2001:2d:1f:0:0:0:0:1
local ipv6=${1}
local colon_num=$(echo ${ipv6} | awk '{print gsub(/:/, "")}')
local replace_str=""
for i in `seq 0 $(( 7 - ${colon_num} ))`;do
replace_str="${replace_str}:0"
done
replace_str="${replace_str}:"
local ipv6_expanded=${ipv6/::/$replace_str}
[[ ${ipv6_expanded} == *: ]] && ipv6_expanded="${ipv6_expanded}0"
[[ ${ipv6_expanded} == :* ]] && ipv6_expanded="0${ipv6_expanded}"
# return value
echo ${ipv6_expanded}
}
function expand_expanded_ipv6() {
# input: 0:0:0:0:0:0:0:0
# output: 0000:0000:0000:0000:0000:0000:0000:0000
# input: 2001:2d:1f:0:0:0:0:1
# output: 2001:002d:001f:0000:0000:0000:0000:0001
local expanded_ipv6=${1}
local hex_arr=(${expanded_ipv6//:/ })
for i in `seq 0 8`;do
local len=${#hex_arr[i]}
for (( j = 4; j > ${len}; -- j )); do
hex_arr[i]="0${hex_arr[i]}"
done
done
# return value
echo ${hex_arr[@]} | tr " " :
}
function simple_ipv6() {
# input: 0:0:0:0:0:0:0:0
# output: ::
# input: 2001:2d:1f:0:0:0:0:1
# output: 2001:2d:1f::1
local expanded_ipv6=${1}
local hex_arr=(${expanded_ipv6//:/ })
local j=0
local replace_str=""
for i in `seq 0 7`;do
local tmp=${hex_arr[i]}
if [ "$tmp"x == "0000"x ]
then
array_tmp[j]=${i}
echo ${array_tmp[j]}
((j++))
fi
done
for m in `seq 0 $(( ${j} - 2 ))`;do
if [ "$array_tmp[m]"x == "$array_tmp[`expr $m + 1`]"x ]
then
break
fi
done
echo "m is:${m}"
for n in `seq $(( ${m})) 8`;do
if [ "${hex_arr[n]}" != "0000" ]
then
#break
echo "test!!!!"
break
fi
done
echo "n is:${n}"
# return value
echo ${hex_arr[@]} | tr " " :
for i in `seq 0 7`;do
new_str=$(echo -e ${hex_arr[i]} | sed -r 's/0*([0-9])/\1/')
if [ $i -lt `expr $m` ]
then
replace_str="${replace_str}${new_str}:"
fi
if [ $i -eq `expr $m - 1` ]
then
replace_str="${replace_str}:"
fi
if [ $i -ge $n ]
then
replace_str="${replace_str}${new_str}:"
fi
echo $replace_str | sed 's/.$//'
done
}
expand_ipv6 $1
expand_expanded_ipv6 $(expand_ipv6 $1)
simple_ipv6 $(expand_expanded_ipv6 $(expand_ipv6 $1))
测试结果如下：
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