package/base-files/files/etc/init.d/sysctl

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2006 OpenWrt.org
   3
   4 START=11
   5
   6 apply_defaults() {
   7         local mem="$(awk '/^MemTotal:/ {print $2}' /proc/meminfo)"
   8         local min_free frag_low_thresh frag_high_thresh
   9
  10         if [ "$mem" -gt 65536 ]; then # 128M
  11                 min_free=16384
  12         elif [ "$mem" -gt 32768 ]; then # 64M
  13                 min_free=8192
  14         else
  15                 min_free=1024
  16                 frag_low_thresh=393216
  17                 frag_high_thresh=524288
  18         fi
  19
  20         sysctl -qw vm.min_free_kbytes="$min_free"
  21
  22         [ "$frag_low_thresh" ] && sysctl -qw \
  23                 net.ipv4.ipfrag_low_thresh="$frag_low_thresh" \
  24                 net.ipv4.ipfrag_high_thresh="$frag_high_thresh" \
  25                 net.ipv6.ip6frag_low_thresh="$frag_low_thresh" \
  26                 net.ipv6.ip6frag_high_thresh="$frag_high_thresh" \
  27                 net.netfilter.nf_conntrack_frag6_low_thresh="$frag_low_thresh" \
  28                 net.netfilter.nf_conntrack_frag6_high_thresh="$frag_high_thresh"
  29
  30         # first set default, then all interfaces to avoid races with appearing interfaces
  31         if [ -d /proc/sys/net/ipv6/conf ]; then
  32                 echo 0 > /proc/sys/net/ipv6/conf/default/accept_ra
  33                 for iface in /proc/sys/net/ipv6/conf/*/accept_ra; do
  34                         echo 0 > "$iface"
  35                 done
  36         fi
  37 }
  38
  39 start() {
  40         apply_defaults
  41         for CONF in /etc/sysctl.d/*.conf /etc/sysctl.conf; do
  42                 [ -f "$CONF" ] && sysctl -p "$CONF" -e >&-
  43         done
  44 }