Pouzitie:<\/p>\n\n\n\n
\n\n -h Displays this help screen\n\n -f Forces a check for network boundary when given a STRING(s)\n\n -i Will read from an Input file (file should contain one CIDR per line) (no network boundary check)\n\n -b Will do the same as \u2013i but with network boundary check<\/code><\/pre>\n\n\n\nPriklady:<\/p>\n\n\n\n
\n\n .\/cidr-to-ip.sh 192.168.0.1\/24\n\n .\/cidr-to-ip.sh 192.168.0.1\/24 10.10.0.0\/28\n\n .\/cidr-to-ip.sh -f 192.168.0.0\/16\n\n .\/cidr-to-ip.sh -i inputfile.txt\n\n .\/cidr-to-ip.sh -b inputfile.txt\n<\/code><\/pre>\n\n\n\n#!\/bin\/bash \n\n############################\n## Methods\n############################ \nprefix_to_bit_netmask() {\n prefix=$1;\n shift=$(( 32 - prefix ));\n\n bitmask=\"\"\n for (( i=0; i < 32; i++ )); do\n num=0\n if [ $i -lt $prefix ]; then\n num=1\n fi\n\n space=\n if [ $(( i % 8 )) -eq 0 ]; then\n space=\" \";\n fi\n\n bitmask=\"${bitmask}${space}${num}\"\n done\n echo $bitmask\n}\n\nbit_netmask_to_wildcard_netmask() {\n bitmask=$1;\n wildcard_mask=\n for octet in $bitmask; do\n wildcard_mask=\"${wildcard_mask} $(( 255 - 2#$octet ))\"\n done\n echo $wildcard_mask;\n}\n\ncheck_net_boundary() {\n net=$1;\n wildcard_mask=$2;\n is_correct=1;\n for (( i = 1; i <= 4; i++ )); do\n net_octet=$(echo $net | cut -d '.' -f $i)\n mask_octet=$(echo $wildcard_mask | cut -d ' ' -f $i)\n if [ $mask_octet -gt 0 ]; then\n if [ $(( $net_octet&$mask_octet )) -ne 0 ]; then\n is_correct=0;\n fi\n fi\n done\n echo $is_correct;\n}\n\n#######################\n## MAIN\n#######################\nOPTIND=1;\ngetopts \"fibh\" force;\n\nshift $((OPTIND-1))\nif [ $force = 'h' ]; then\n echo \"\"\n echo -e \"THIS SCRIPT WILL EXPAND A CIDR ADDRESS.\\n\\nSYNOPSIS\\n .\/cidr-to-ip.sh [OPTION(only one)] [STRING\/FILENAME]\\nDESCRIPTION\\n -h Displays this help screen\\n -f Forces a check for network boundary when given a STRING(s)\\n -i Will read from an Input file (no network boundary check)\\n -b Will do the same as \u2013i but with network boundary check\\n\\nEXAMPLES\\n .\/cidr-to-ip.sh 192.168.0.1\/24\\n .\/cidr-to-ip.sh 192.168.0.1\/24 10.10.0.0\/28\\n .\/cidr-to-ip.sh -f 192.168.0.0\/16\\n .\/cidr-to-ip.sh -i inputfile.txt\\n .\/cidr-to-ip.sh -b inputfile.txt\\n\"\n exit\nfi\n\nif [ $force = 'i' ] || [ $force = 'b' ]; then\n\n old_IPS=$IPS\n IPS=$'\\n'\n lines=($(cat $1)) # array\n IPS=$old_IPS\n else\n lines=$@\nfi\n\nfor ip in ${lines[@]}; do\n net=$(echo $ip | cut -d '\/' -f 1);\n prefix=$(echo $ip | cut -d '\/' -f 2);\n do_processing=1;\n\n bit_netmask=$(prefix_to_bit_netmask $prefix);\n\n wildcard_mask=$(bit_netmask_to_wildcard_netmask \"$bit_netmask\");\n is_net_boundary=$(check_net_boundary $net \"$wildcard_mask\");\n\n if [ $force = 'f' ] && [ $is_net_boundary -ne 1 ] || [ $force = 'b' ] && [ $is_net_boundary -ne 1 ] ; then\n read -p \"Not a network boundary! Continue anyway (y\/N)? \" -n 1 -r\n echo ## move to a new line\n if [[ $REPLY =~ ^[Yy]$ ]]; then\n do_processing=1;\n else\n do_processing=0;\n fi\n fi \n\n if [ $do_processing -eq 1 ]; then\n str=\n for (( i = 1; i <= 4; i++ )); do\n range=$(echo $net | cut -d '.' -f $i)\n mask_octet=$(echo $wildcard_mask | cut -d ' ' -f $i)\n if [ $mask_octet -gt 0 ]; then\n range=\"{$range..$(( $range | $mask_octet ))}\";\n fi\n str=\"${str} $range\"\n done\n ips=$(echo $str | sed \"s, ,\\\\.,g\"); ## replace spaces with periods, a join...\n\n eval echo $ips | tr ' ' '\\n'\nelse\nexit\n fi\n\ndone<\/code><\/pre>\n \t