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#!/bin/sh /etc/rc.common
# Copyright (C) 2006 OpenWrt.org

START=11

apply_defaults() {
        local mem="$(awk '/^MemTotal:/ {print $2}' /proc/meminfo)"
        local min_free frag_low_thresh frag_high_thresh

        if [ "$mem" -gt 65536 ]; then # 128M
                min_free=16384
        elif [ "$mem" -gt 32768 ]; then # 64M
                min_free=8192
        else
                min_free=1024
                frag_low_thresh=393216
                frag_high_thresh=524288
        fi

        sysctl -qw vm.min_free_kbytes="$min_free"

        [ "$frag_low_thresh" ] && sysctl -qw \
                net.ipv4.ipfrag_low_thresh="$frag_low_thresh" \
                net.ipv4.ipfrag_high_thresh="$frag_high_thresh" \
                net.ipv6.ip6frag_low_thresh="$frag_low_thresh" \
                net.ipv6.ip6frag_high_thresh="$frag_high_thresh" \
                net.netfilter.nf_conntrack_frag6_low_thresh="$frag_low_thresh" \
                net.netfilter.nf_conntrack_frag6_high_thresh="$frag_high_thresh"

        # first set default, then all interfaces to avoid races with appearing interfaces
        if [ -d /proc/sys/net/ipv6/conf ]; then
                echo 0 > /proc/sys/net/ipv6/conf/default/accept_ra
                for iface in /proc/sys/net/ipv6/conf/*/accept_ra; do
                        echo 0 > "$iface"
                done
        fi
}

start() {
        apply_defaults
        for CONF in /etc/sysctl.d/*.conf /etc/sysctl.conf; do
                [ -f "$CONF" ] && sysctl -e -p "$CONF" >&-
        done
}