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scuzzillascuzzilla
committedJun 16, 2022
adding overaly parser to the repo list ...
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‎cfgs/README.md

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#### Required folder structure

‎lsts/README.md

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#### Required folder structure

‎oparser.sh

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#!/usr/bin/env bash
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# Author: Salvatore Cuzzilla
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# em@il: salvatore@cuzzilla.org
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# Starting date: 07-01-2021
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# Last change date: 19-01-2020
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# Release date: TBD
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# Description: extract L3VPN overlay cfg from an MPLS router
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set -o errexit
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set -o nounset
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set -o pipefail
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work_dir=$(dirname "$(readlink --canonicalize-existing "${0}" 2> /dev/null)")
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readonly epoch=$(date +'%s')
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readonly error_validating_input=79
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readonly error_reading_file=80
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readonly error_parsing_options=81
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readonly error_missing_options=82
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readonly error_unknown_options=83
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readonly error_missing_options_arg=84
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readonly error_unimplemented_options=85
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readonly readonly script_name="${0##*/}"
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f_option_flag=0
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i_option_flag=0
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h_option_flag=0
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trap clean_up ERR SIGINT SIGTERM
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usage() {
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cat <<MAN
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Usage: ${script_name} [-f <ARG> ] [ -i <ARG> ] || [-h]
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DESCRIPTION:
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this tool can be used the extract the overaly configuration (MPLS-L3VPN)
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from MPLS-PE routers based on CISCO-XR OS
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OPTIONS:
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-h
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Print this help and exit
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-f
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[mandatory] Specify the MPLS-PE configuration file - Must be in 'cisco/formal' format
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-i
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[mandatory] Specify Bundle-Ethernet interface/s
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(Examples:
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- Bundle-Ether7 is considering all sub-if belonging to bundle number 7
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- Bundle-Ether7.100 is considering only sub-if 100)
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MAN
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}
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clean_up() {
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if [[ -d "${work_dir}/lsts/${pe_hostname}_${epoch}" ]]; then
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echo -e "Deleting: ${work_dir}/lsts/${pe_hostname}_${epoch} ..."
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rm -rf "${work_dir}/lsts/${pe_hostname}_${epoch}"
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fi
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if [[ -d "${work_dir}/cfgs/${pe_hostname}_${epoch}" ]]; then
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echo -e "Deleting: ${work_dir}/cfgs/${pe_hostname}_${epoch} ..."
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rm -rf "${work_dir}/cfgs/${pe_hostname}_${epoch}"
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fi
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}
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die() {
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local -r msg="${1}"
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local -r code="${2:-90}"
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echo "${msg}" >&2
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exit "${code}"
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}
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parse_user_options() {
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while getopts ":f:i:h" opts; do
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case "${opts}" in
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f)
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f_option_flag=1
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readonly f_arg="${OPTARG}"
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;;
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i)
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i_option_flag=1
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readonly i_arg="${OPTARG}"
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;;
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h)
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h_option_flag=1
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;;
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:)
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die "error - mind your options/arguments - [ -h ] to know more" "${error_unknown_options}"
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;;
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\?)
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die "error - mind your options/arguments - [ -h ] to know more" "${error_missing_options_arg}"
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;;
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*)
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die "error - mind your options/arguments - [ -h ] to know more" "${error_unimplemented_options}"
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;;
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esac
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done
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}
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shift $((OPTIND -1))
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# Generating the lst "bundle-if,vrf" main source to be able to extract the level2 lst & the level1 cf
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# Input: $f_arg && $i_arg
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# Output: $level1_lst
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gen_level1_lst_rgx1() {
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echo -e "Generating ${level1_lst} from ${pe_formal_cf} ..."
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$(egrep "^interface ${pe_bundle_if}\svrf" "${pe_formal_cf}" | awk -F " " '{print $2","$4}' > "${level1_lst}")
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}
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gen_level1_lst_rgx2() {
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echo -e "Generating ${level1_lst} from ${pe_formal_cf} ..."
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$(egrep "^interface ${pe_bundle_if}.*\svrf" "${pe_formal_cf}" | awk -F " " '{print $2","$4}' > "${level1_lst}")
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}
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# Generating the lst for policy-maps & route-policies to be able to extract the associated overaly cf
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# Input: $f_arg && $level1_lst
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# Output: $level2_pm_lst && $level2_rpl_lst
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gen_level2_lst() {
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if [[ ! -f "${level1_lst}" ]]; then
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die "error - reading file: ${level1_lst}" "${error_reading_file}"
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fi
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echo -e "Generating ${level2_pm_lst} && ${level2_rpl_lst} from ${pe_formal_cf} ..."
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while read -r line
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do
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local be_if="$(echo "${line}" | awk -F "," '{print $1}')"
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local vrf_if="$(echo "${line}" | awk -F "," '{print $2}')"
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# to be able to distinguish between rpl-00 & rpl-01
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local vrf_if_rpl="${vrf_if::-3}"
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# workaround to cover rpl name unmatching the vrf name
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local vrf_if_rpl_unmatch="${vrf_if_rpl#"NGDCS-"}"
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if [[ ${vrf_if} != "hsrp" ]]; then
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local policy_map=$(egrep "${vrf_if}|${be_if}$be_if_pad" "${pe_formal_cf}" | egrep "^policy-map.*")
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#local route_policy=$(egrep "${vrf_if_rpl}|${be_if}$be_if_pad" "${pe_formal_cf}" | egrep "^route-policy.*")
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# workaround to cover rpl name unmatching the vrf name
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local route_policy=$(egrep "${vrf_if_rpl_unmatch}|${be_if}$be_if_pad" "${pe_formal_cf}" | egrep "^route-policy.*")
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if [[ ! -z "${policy_map}" ]]; then
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echo -e "${policy_map}" >> "${level2_pm_lst}"
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else
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echo -e "pm empty for line ${be_if},${vrf_if}" >> "${level2_pm_empty_lst}"
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fi
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if [[ ! -z "${route_policy}" ]]; then
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echo -e "${route_policy}" >> "${level2_rpl_lst}"
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else
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echo -e "rpl empty for line ${be_if},${vrf_if}" >> "${level2_rpl_empty_lst}"
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fi
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fi
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done < "${level1_lst}"
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}
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# Generating level1 cf ( vrf, if, router_[bgp|static|hsrp] )
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# Input: $f_arg && $level1_lst
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# Output: $level1_vrf_cf && $level1_if_cf && $level1_rbgp_cf && $level1_rstatic_cf && $level1_hsrp_cf
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gen_level1_cf() {
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while read -r line
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do
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local be_if="$(echo "${line}" | awk -F "," '{print $1}')"
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local vrf_if="$(echo "${line}" | awk -F "," '{print $2}')"
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if [[ ${vrf_if} != "hsrp" ]]; then
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local vrf=$(egrep "${vrf_if}|${be_if}$be_if_pad" "${pe_formal_cf}" | egrep "^vrf.*")
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local interface=$(egrep "${vrf_if}|${be_if}$be_if_pad" "${pe_formal_cf}" | egrep "^interface.*")
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local router_bgp=$(egrep "${vrf_if}|${be_if}$be_if_pad" "${pe_formal_cf}" | egrep "^router\sbgp.*")
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local router_static=$(egrep "${vrf_if}|${be_if}$be_if_pad" "${pe_formal_cf}" | egrep "^router\sstatic.*")
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local router_hsrp=$(egrep "${vrf_if}|${be_if}$be_if_pad" "${pe_formal_cf}" | egrep "^router\shsrp.*")
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echo -e "Extracting Level1 MPLS-PEs overlay configrations for ${be_if} ..."
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if [[ ! -z "${vrf}" ]]; then
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echo -e "${vrf}" >> "${level1_vrf_cf}"
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else
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echo -e "vrf empty for line ${be_if},${vrf_if}" >> "${level1_vrf_empty_cf}"
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fi
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if [[ ! -z "${interface}" ]]; then
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echo -e "${interface}" >> "${level1_if_cf}"
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else
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echo -e "interface empty for line ${be_if},${vrf_if}" >> "${level1_if_empty_cf}"
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fi
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if [[ ! -z "${router_bgp}" ]]; then
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echo -e "${router_bgp}" >> "${level1_rbgp_cf}"
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else
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echo -e "router_bgp empty for line ${be_if},${vrf_if}" >> "${level1_rbgp_empty_cf}"
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fi
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if [[ ! -z "${router_static}" ]]; then
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echo -e "${router_static}" >> "${level1_rstatic_cf}"
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else
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echo -e "router_static empty for line ${be_if},${vrf_if}" >> "${level1_rstatic_empty_cf}"
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fi
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if [[ ! -z "${router_hsrp}" ]]; then
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echo -e "${router_hsrp}" >> "${level1_hsrp_cf}"
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else
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echo -e "router_hsrp empty for line ${be_if},${vrf_if}" >> "${level1_router_hsrp_empty_cf}"
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fi
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fi
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done < "${level1_lst}"
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}
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# Generating level2 cf ( policy_map, route_policy )
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# Input: $f_arg && $level2_pm_lst && $level2_rpl_lst
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# Output: $level2_pm_cf && $level2_rpl_cf
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gen_level2_cf() {
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if [[ ! -f "${level2_rpl_lst}" ]]; then
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die "error - reading file: ${level2_rpl_lst}" "${error_reading_file}"
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fi
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if [[ ! -f "${level2_pm_lst}" ]]; then
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die "error - reading file: ${level2_pm_lst}" "${error_reading_file}"
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fi
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while read -r line
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do
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if [[ ! -z "${line}" ]]; then
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rpl=$(sed -n "/^${line}/,/end-policy/p" "${pe_formal_cf}")
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echo -e "Extracting Level2 MPLS-PEs overlay configrations for ${line} ..."
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if [[ ! -z "${rpl}" ]]; then
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echo -e "${rpl}" >> "${level2_rpl_cf}"
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echo -e "!" >> "${level2_rpl_cf}"
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else
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echo -e "rpl empty for line ${be_if},${vrf_if}" >> "${level2_rpl_empty_cf}"
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fi
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fi
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done < "${level2_rpl_lst}"
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while read -r line
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do
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if [[ ! -z "${line}" ]]; then
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pm=$(sed -n "/^${line}/,/end-policy-map/p" "${pe_formal_cf}")
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echo -e "Extracting Level2 MPLS-PEs overlay configrations for ${line} ..."
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if [[ ! -z "${pm}" ]]; then
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echo -e "${pm}" >> "${level2_pm_cf}"
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echo -e "!" >> "${level2_pm_cf}"
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else
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echo -e "pm empty for line ${be_if},${vrf_if}" >> "${level2_pm_empty_cf}"
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fi
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fi
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done < "${level2_pm_lst}"
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}
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parse_user_options "${@}"
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if ((h_option_flag)); then
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usage
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exit 0
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fi
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if ((f_option_flag)) && ((i_option_flag)); then
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readonly pe_hostname=$(echo "${f_arg}" | awk -F "." '{print $1}')
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readonly pe_formal_cf="${work_dir}/${f_arg}"
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readonly pe_bundle_if="${i_arg}"
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readonly be_if_pad=" "
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readonly level1_lst="${work_dir}/lsts/${pe_hostname}_${epoch}/level1.lst"
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readonly level2_lst="${work_dir}/lsts/${pe_hostname}_${epoch}/level2.lst"
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readonly level2_pm_lst="${work_dir}/lsts/${pe_hostname}_${epoch}/level2_pm.lst"
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readonly level2_rpl_lst="${work_dir}/lsts/${pe_hostname}_${epoch}/level2_rpl.lst"
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readonly level1_vrf_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level1_vrf.cf"
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readonly level1_if_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level1_if.cf"
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readonly level1_rbgp_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level1_rbgp.cf"
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readonly level1_rstatic_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level1_rstatic.cf"
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readonly level1_hsrp_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level1_hsrp.cf"
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readonly level2_rpl_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level2_rpl.cf"
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readonly level2_pm_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level2_pm.cf"
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readonly level2_pm_empty_lst="${work_dir}/lsts/${pe_hostname}_${epoch}/level2_pm_empty.lst"
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readonly level2_rpl_empty_lst="${work_dir}/lsts/${pe_hostname}_${epoch}/level2_rpl_empty.lst"
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readonly level1_vrf_empty_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level1_vrf_empty.cf"
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readonly level1_if_empty_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level1_if_empty.cf"
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readonly level1_rbgp_empty_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level1_rbgp_empty.cf"
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readonly level1_rstatic_empty_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level1_rstatic_empty.cf"
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readonly level1_hsrp_empty_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level1_hsrp_empty.cf"
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readonly level2_rpl_empty_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level2_rpl_empty.cf"
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readonly level2_pm_empty_cf="${work_dir}/cfgs/${pe_hostname}_${epoch}/level2_pm_empty.cf"
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readonly pe_bundle_if_rgx1="^Bundle-Ether[0-9]{1,5}\.[0-9]{1,5}$"
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readonly pe_bundle_if_rgx2="^Bundle-Ether[0-9]{1,5}$"
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if [[ ! -f "${pe_formal_cf}" ]]; then
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die "error - file reading failed: ${pe_formal_cf}" "${error_reading_file}"
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fi
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if [[ ! "${pe_bundle_if}" =~ ${pe_bundle_if_rgx1} ]] | [[ ! "${pe_bundle_if}" =~ ${pe_bundle_if_rgx2} ]]; then
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die "error - input validation failed: ${pe_bundle_if}" "${error_validating_input}"
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fi
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if [[ ! -d "${work_dir}/lsts/${pe_hostname}_${epoch}" ]]; then
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mkdir -p "${work_dir}/lsts/${pe_hostname}_${epoch}"
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fi
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if [[ ! -d "${work_dir}/cfgs/${pe_hostname}_${epoch}" ]]; then
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mkdir -p "${work_dir}/cfgs/${pe_hostname}_${epoch}"
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fi
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if [[ "${pe_bundle_if}" =~ ${pe_bundle_if_rgx1} ]]; then
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gen_level1_lst_rgx1
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elif [[ "${pe_bundle_if}" =~ ${pe_bundle_if_rgx2} ]]; then
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gen_level1_lst_rgx2
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fi
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gen_level2_lst
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gen_level1_cf
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gen_level2_cf
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else
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die "error - mind your options/arguments - [ -h ] to know more" "${error_missing_options}"
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fi
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exit 0

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