etc/rs.lwip

   1 #!/bin/sh
   2
   3 # Recovery script for LWIP.  Aside from restarting the LWIP service itself, the
   4 # script aims to restart all of networking.  This includes in particular any
   5 # network daemons: these daemons typically have open (listening) sockets that
   6 # will now have become invalid, and the daemons typically do not know how to
   7 # deal with that.  Unfortunately, there is no reliable way to determine the
   8 # list of rc scripts that concern network daemons, so for now we hardcode a
   9 # list of known ones here: this is the list of network-related rc.d scripts.
  10 # FIXME: since we are not yet done importing etc/rc.d from NetBSD, this list is
  11 # still incomplete and should be extended as more scripts are imported!
  12 RC_SCRIPTS="dhclient dhcpcd dhcpd dhcrelay ftpd inetd named network rtadvd \
  13     sshd staticroute syslogd"
  14
  15 exec < /dev/console
  16 exec > /dev/console
  17 exec 2> /dev/console
  18
  19 export HOME=/
  20 export PATH=/sbin:/usr/sbin:/bin:/usr/bin
  21
  22 . /etc/rc.subr
  23 . /etc/rc.conf
  24
  25 # Restart the LWIP service.
  26
  27 # There is no need to shut down daemons before bringing back up the service.
  28 # Note that "minix-service restart" does not do the same as these steps, and in
  29 # fact breaks a proper LWIP restart.
  30 restarts=$(grep restarts /proc/service/$1 | cut -d: -f2)
  31 minix-service down "$1"
  32 minix-service up /service/lwip -dev /dev/bpf -script /etc/rs.lwip \
  33     -restarts $(($restarts + 1))
  34
  35 # Reload TCP ISN, or make a new one if there is none.  Do not save anything.
  36 TCPISN_FILE=/usr/adm/tcpisn.dat
  37 TCPISN_LEN=$(sysctl -n net.inet.tcp.isn_secret | awk '{print length/2}')
  38 if [ ! -f $TCPISN_FILE ]; then TCPISN_FILE=/dev/random; fi
  39 sysctl -qw net.inet.tcp.isn_secret=`dd if=$TCPISN_FILE bs=$TCPISN_LEN \
  40     count=1 2>/dev/null | hexdump -v -e '/1 "%02x"'` 2>/dev/null
  41
  42 # Let LWIP find all network drivers before performing initialization.
  43 sleep 1
  44
  45 # Restart all network daemons.
  46
  47 # Start with dhcpcd, which may be launched directly from ifconfig.if(5) scripts
  48 # and therefore may not be enabled in, and thus stopped by, rc.d scripts below.
  49 service dhcpcd onestop >/dev/null 2>&1
  50
  51 # Then stop and start all known network daemons using their rc.d scripts.
  52 regex='/('"$(echo $RC_SCRIPTS | tr ' ' '|')"')$'
  53 scripts=$(for rcd in ${rc_directories:-/etc/rc.d}; do
  54         test -d ${rcd} && echo ${rcd}/*; done)
  55 files=$(rcorder ${scripts} | grep -E "$regex")
  56
  57 for _rc_elem in $(reverse_list $files); do
  58         # We have already stopped dhcpcd if it was running, so skip it here.
  59         [ $_rc_elem != /etc/rc.d/dhcpcd ] && run_rc_script $_rc_elem stop
  60 done
  61
  62 for _rc_elem in $files; do
  63         run_rc_script $_rc_elem start
  64 done