Commit version 24.12.13800
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188
scripts/ifAlias
Normal file → Executable file
188
scripts/ifAlias
Normal file → Executable file
@ -1,65 +1,129 @@
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#!/usr/bin/perl -w
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#!/bin/bash
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# -------------------------------------------------------------------------
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# Observium
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#
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# This file is part of Observium.
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#
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# @package observium
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# @subpackage scripts
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# @copyright (C) 2006-2013 Adam Armstrong, (C) 2013-2023 Observium Limited
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# -------------------------------------------------------------------------
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## From Sascha Schaal
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# Add to snmpd.conf something like:
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# pass .1.3.6.1.2.1.31.1.1.1.18 /usr/local/bin/ifAlias
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BASE=".1.3.6.1.2.1.31.1.1.1.18" # IF-MIB::ifAlias
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REQ="$1" # -g get, -n getnext, -s set
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OID="$2" # Requested OID
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use strict;
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use warnings;
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my $REQ = $ARGV[0];
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my $ROID = $ARGV[1];
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my $Base = ".1.3.6.1.2.1.31.1.1.1.18";
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my @iface_list = `ip l | grep mtu`;
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my $index = 0;
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my %Table;
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my $p_oid;
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my $p_type = "STRING";
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my $p_desc;
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if ($ROID eq $Base){
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$index = 0;
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}
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else{
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my @split = split("$Base.",$ROID);
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$index = $split[1];
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}
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foreach my $row (@iface_list){
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my @split = split(": ", $row);
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my $desc = `grep "^# $split[1]:" /etc/network/interfaces|sed s/^\\#\\ $split[1]:\\ //`;
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my ($key, $value) = ("$Base.$split[0]",$desc);
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$Table{$key} = $value;
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}
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if ($REQ eq "-g"){
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if ($index == 0){
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exit 0;
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}
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else{
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if( exists($Table{$ROID} ) ) {
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$p_oid = $ROID;
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$p_desc = $Table{$ROID};
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}
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else{
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print "noSuchName\n";
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exit 0;
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}
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}
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}
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elsif ($REQ eq "-n"){
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for ($index, $index <= keys %Table,$index++){
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if( exists($Table{"$Base.$index"} ) ) {
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$p_oid = "$Base.$index";
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$p_desc = $Table{"$Base.$index"};
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}
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else{
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exit 0;
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}
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}
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}
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else{
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exit 0;
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}
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if [ "$REQ" = "-s" ]; then
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#echo $* >> /tmp/passtest.log
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exit 0
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fi
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print "$p_oid\n";
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print "$p_type\n";
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print "$p_desc";
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exit 0;
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#1 lo
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#2 eth0
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#3 eth1
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LINKS="$(ip link | awk -F ": " '/^[0-9]+:/ {print $1 " " $2}')"
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#echo "$LINKS"
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_starts_with() {
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local _str="$1"
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local _sub="$2"
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echo "$_str" | grep "^$_sub" >/dev/null 2>&1
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}
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ifindex() {
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local IF="${OID#"${BASE}".}"
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local line
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if [ "$REQ" = "-g" ]; then
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# GET request
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case $IF in ''|*[!0-9]*) return 1;; esac; # not int number
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echo "$IF"
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return 0
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else
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# GETNEXT request
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if [ "$IF" = "$BASE" ] || [ "$IF" = "" ]; then
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# first interface index
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echo "${LINKS%% *}"
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return 0
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else
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local next=false
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echo "$LINKS" | while read line; do
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if $next; then echo "${line%% *}"; return 0; fi
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if _starts_with "$line" "$IF "; then next=true; fi
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done
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fi
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fi
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return 1
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}
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ifname() {
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local IF="$1"
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local line
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echo "$LINKS" | while read line; do
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if _starts_with "$line" "$IF "; then echo "${line##* }"; fi
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done
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}
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ifalias_sys() {
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#local IFNAME="$1"
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local sys_file="/sys/class/net/${1}/ifalias"
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# 15: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
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# link/none
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# alias Wireguard VPN
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if [ -f "$sys_file" ]; then
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cat "$sys_file"
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fi
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}
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ifalias_frr() {
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local IFNAME="$1"
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# FRR
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if [ -x "/bin/vtysh" ]; then
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# prefer vtysh
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vtysh -c "show interface description" 2>&1 /dev/null | grep -si -m1 "^$IFNAME " | awk '{for (i=4; i<NF; i++) printf $i " "; print $NF}'
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elif [ -f "/etc/frr/frr.conf" ]; then
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awk "/^interface ${IFNAME}/,/^exit/" /etc/frr/frr.conf | awk "/^ description /" | sed "s/^\\ description\\ //"
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fi
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}
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ifalias_conf() {
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local IFNAME="$1"
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if [ -f "/etc/network/interfaces.d/$IFNAME" ]; then
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CFG="/etc/network/interfaces.d/$IFNAME"
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elif [ -f "/etc/network/interfaces" ]; then
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CFG="/etc/network/interfaces"
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elif [ -f "/etc/sysconfig/network-scripts/ifcfg-$IFNAME" ]; then
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CFG="/etc/sysconfig/network-scripts/ifcfg-$IFNAME"
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elif [ -f "/etc/conf.d/net-conf-$IFNAME" ]; then
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CFG="/etc/conf.d/net-conf-$IFNAME"
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elif [ -f "/etc/conf.d/net" ]; then
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CFG="/etc/conf.d/net"
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else
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return 1
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fi
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grep -si -m1 "^# $IFNAME:" $CFG | sed "s/^# $IFNAME: //i"
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}
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IFINDEX="$(ifindex)"
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[ "$IFINDEX" ] || exit 1 # incorrect ifindex
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IFNAME="$(ifname "$IFINDEX")"
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IFALIAS="$(ifalias_frr "$IFNAME")"
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# get ifalias from config files
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[ "$IFALIAS" ] || IFALIAS="$(ifalias_conf "$IFNAME")"
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# if not found in config, try common link alias
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# sudo ip link set <interface> alias "<ifalias>"
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[ "$IFALIAS" ] || IFALIAS="$(ifalias_sys "$IFNAME")"
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echo "${BASE}.${IFINDEX}"
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echo "string"
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echo "$IFALIAS"
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exit 0
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