147 lines
5.0 KiB
Bash
147 lines
5.0 KiB
Bash
#!/bin/sh /etc/rc.common
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# Copyright (C) 2009-2016 OpenWrt.org
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START=95
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USE_PROCD=1
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PROCD_DEBUG=1
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PROG=/usr/bin/mini_snmpd
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NAME=mini_snmpd
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# mini_snmpd now starts later in the game. Expects filesystems monitored to be already mounted,
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# and at least configuration entry for network physical interface defined in /etc/config/network
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# It handles network interfaces not yet present (e.g. ppp) but will statfs() the root/wrong filesystem if device not mounted
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append_disk() {
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local disk="$1"
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[ -z $disk_count ] && disk_count=1
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if grep -qF "$disk" /proc/mounts ; then
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if [ $disk_count -le 4 ] ; then
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append disks "$disk" ','
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disk_count=$((disk_count++))
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else
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logger -s -t mini_snmpd -p daemon.error "more than 4 mountpoints defined in uci. Disc $disk ignored."
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fi
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else
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logger -s -t mini_snmpd -p daemon.error "mountpoint $disk for snmp monitoring not mounted, ignoring."
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fi
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}
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append_interface() {
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local name="$1"
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local device
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[ $(ubus -S call network.interface dump | jsonfilter -e "@.interface[@.interface=\"$name\"].device") ] && {
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append interfaces "${device:-$name}" ','
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}
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}
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append_arg() {
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local cfg="$1"
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local var="$2"
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local opt="$3"
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local def="$4"
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local val
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config_get val "$cfg" "$var"
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[ -n "$val" -o -n "$def" ] && procd_append_param command $opt "${val:-$def}"
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}
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listen_interface_status() {
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local cfg="$1"
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}
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watch_interfaces() {
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local cfg="$1"
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local enabled listen_interface
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config_get_bool enabled "$cfg" "enabled" '1'
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[ "$enabled" -gt 0 ] || return 0
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config_get listen_interface "$cfg" listen_interface
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[ "$listen_interface" = "all" ] && return 0
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local listen_interface_up=$(ubus -S call network.interface dump | jsonfilter -e "@.interface[@.interface=\"$listen_interface\"].up")
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# if ubus knows about it regardless if it's status we'll watch for changes.
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[ -n "$listen_interface" -a -n "$listen_interface_up" ] && trigger_interfaces=" ${listen_interface} ${trigger_interfaces}"
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}
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service_triggers() {
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#procd_add_reload_trigger mini_snmpd
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procd_open_trigger
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procd_add_config_trigger "config.change" "mini_snmpd" /etc/init.d/mini_snmpd reload
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config_load 'mini_snmpd'
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config_foreach watch_interfaces 'mini_snmpd'
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[ -n "${trigger_interfaces}" ] & {
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for n in $trigger_interfaces ; do
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procd_add_interface_trigger "interface.*" $n /etc/init.d/mini_snmpd restart
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done
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}
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procd_close_trigger
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#procd_add_validation validate_section_mini_snmpd
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}
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start_instance() {
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local cfg="$1" disks="" interfaces=""
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local ipv6 debug auth
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config_get_bool enabled "$cfg" "enabled" '1'
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[ "$enabled" -gt 0 ] || return 1
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local listen_interface listen_interface_json listen_interface_ip listen_interface_device listen_interface_up
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config_get_bool ipv6 "$cfg" "ipv6" '0'
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config_get listen_interface "$cfg" listen_interface
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[ -n "$listen_interface" -a "$listen_interface" != "all" ] && {
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listen_interface_json=$(ubus -S call network.interface.$listen_interface status)
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[ -z "$listen_interface_json" ] && {
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logger -s -t mini_snmpd -p daemon.error "interface configured to bind to is not configured in /etc/config/network"
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return 1
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}
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listen_interface_up=$(jsonfilter -s "$listen_interface_json" -e '@.up')
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if [ "$ipv6" -gt 0 ]; then
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listen_interface_ip=$(jsonfilter -s "$listen_interface_json" -e "@['ipv6-address'][0].address")
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else
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listen_interface_ip=$(jsonfilter -s "$listen_interface_json" -e "@['ipv4-address'][0].address")
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fi
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[ -n "$listen_interface_ip" -a "$listen_interface_up" = 'true' ] || {
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logger -s -t mini_snmpd -p daemon.debug "interface configured to bind to is not up yet, procd will try again later"
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return 0
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}
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listen_interface_device=$(jsonfilter -s "$listen_interface_json" -e '@.l3_device')
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}
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procd_open_instance
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procd_set_param command "$PROG" -n
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procd_set_param stdout "1"
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procd_set_param stderr "1"
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procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}
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append_arg "$cfg" community "-c"
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append_arg "$cfg" location "-L"
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append_arg "$cfg" contact "-C"
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append_arg "$cfg" udp_port "-p"
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append_arg "$cfg" tcp_port "-P"
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append_arg "$cfg" vendor_oid "-V"
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append_arg "$cfg" mib_timeout "-t"
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[ "$ipv6" -gt 0 ] && procd_append_param command "-6"
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config_get_bool debug "$cfg" "debug" '0'
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[ "$debug" -gt 0 ] && procd_append_param command "-v"
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config_get_bool auth "$cfg" "auth" '0'
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[ "$auth" -gt 0 ] && procd_append_param command "-a"
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config_list_foreach "$cfg" 'disks' append_disk
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[ -n "$disks" ] && procd_append_param command "-d $disks"
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config_list_foreach "$cfg" 'interfaces' append_interface
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[ -n "$interfaces" ] && procd_append_param command "-i $interfaces"
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# https://github.com/troglobit/mini-snmpd/issues/4 - yes I know there is no space after the -I
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[ -n "$listen_interface_device" ] && procd_append_param command "-I$listen_interface_device"
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procd_close_instance
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}
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start_service() {
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config_load 'mini_snmpd'
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config_foreach start_instance 'mini_snmpd'
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}
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reload_service() {
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stop
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start
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}
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