#!/bin/sh - # # $OpenBSD: netstart,v 1.176 2017/04/08 08:33:05 rpe Exp $ # Turn off Strict Bourne shell mode. set +o sh # Echo file $1 to stdout. Skip comment lines and delete everything # after the first '#' from other lines. Strip leading and trailing # whitespace if IFS is set. # Usage: stripcom /path/to/file stripcom() { local _file=$1 _line [[ -f $_file ]] || return while read _line; do [[ -n ${_line%%#*} ]] && print -r -- "$_line" done <$_file } # Start a single interface. # Usage: ifstart if1 ifstart() { # Note: Do not rename the 'if' variable which is documented as being # usable in hostname.if(5) files. local if=$1 _file=/etc/hostname.$1 _stat # Interface names must be alphanumeric only. We check to avoid # configuring backup or temp files, and to catch the "*" case. [[ $if != +([[:alpha:]])+([[:digit:]]) ]] && return if [[ ! -f $_file ]]; then echo "netstart: $_file: No such file or directory" return fi # Not using stat(1), we can't rely on having /usr yet. set -A _stat -- $(ls -nL $_file) if [ "${_stat[0]#???????} ${_stat[2]} ${_stat[3]}" != "--- 0 0" ]; then echo "WARNING: $_file is insecure, fixing permissions" chmod -LR o-rwx $_file chown -LR root.wheel $_file fi # Check for ifconfig'able interface. (ifconfig $if || ifconfig $if create) >/dev/null 2>&1 || return # Now parse the hostname.* file. while :; do if [ "$cmd2" ]; then # We are carrying over from the 'read dt dtaddr' # last time. set -- $cmd2 af=$1 name=$2 mask=$3 bcaddr=$4 ext1=$5 cmd2= # Make sure and get any remaining args in ext2, # like the read below. i=1 while [ $i -lt 6 -a -n "$1" ]; do shift; let i=i+1; done ext2="$@" else # Read the next line or exit the while loop. read af name mask bcaddr ext1 ext2 || break fi # $af can be "dhcp", "up", "rtsol", an address family, commands, # or a comment. case "$af" in "#"*|"") # Skip comments and empty lines. continue ;; "!"*) # Parse commands. cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}" ;; "dhcp") [ "$name" = "NONE" ] && name= [ "$mask" = "NONE" ] && mask= [ "$bcaddr" = "NONE" ] && bcaddr= cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 down" cmd="$cmd;dhclient $if" dhcpif="$dhcpif $if" ;; "rtsol") rtsolif="$rtsolif $if" cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up" ;; *) read dt dtaddr if [ "$name" = "alias" ]; then # Perform a 'shift' of sorts. alias=$name name=$mask mask=$bcaddr bcaddr=$ext1 ext1=$ext2 ext2= else alias= fi cmd="ifconfig $if $af $alias $name" case "$dt" in dest) cmd="$cmd $dtaddr" ;; *) cmd2="$dt $dtaddr" ;; esac case $af in inet) if [ ! -n "$name" ]; then echo "/etc/hostname.$if: inet alone is invalid" return fi [ "$mask" ] && cmd="$cmd netmask $mask" if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then cmd="$cmd broadcast $bcaddr" fi ;; inet6) if [ ! -n "$name" ]; then echo "/etc/hostname.$if: inet6 alone is invalid" return fi [ "$mask" ] && cmd="$cmd prefixlen $mask" cmd="$cmd $bcaddr" ;; *) cmd="$cmd $mask $bcaddr" ;; esac cmd="$cmd $ext1 $ext2" ;; esac eval "$cmd" done <$_file } # Start multiple interfaces by driver name. # Usage: ifmstart "em iwm" "trunk vlan" # Start "$1" interfaces in order or all interfaces if empty. # Don't start "$2" interfaces. "$2" is optional. ifmstart() { local _sifs=$1 _xifs=$2 _hn _if _sif _xif for _sif in ${_sifs:-ALL}; do for _hn in /etc/hostname.*; do _if=${_hn#/etc/hostname.} [[ $_if == '*' ]] && continue # Skip unwanted ifs. for _xif in $_xifs; do [[ $_xif == ${_if%%[0-9]*} ]] && continue 2 done # Start wanted ifs. [[ $_sif == @(ALL|${_if%%[0-9]*}) ]] && ifstart $_if done done } # IPv6 autoconf the interfaces in the $rtsolif list. # Usage: ifv6autoconf ifv6autoconf() { local _if # $ip6kernel will not have been set if we were invoked with a # list of interface names ifconfig lo0 inet6 >/dev/null 2>&1 || return 0 for _if in $rtsolif; do ifconfig $_if inet6 autoconf done } # Parse /etc/mygate and add default routes for IPv4 and IPv6 # Usage: defaultroute defaultroute() { [[ -z $dhcpif ]] && stripcom /etc/mygate | while read gw; do [[ $gw == @(*:*) ]] && continue route -qn delete default >/dev/null 2>&1 route -qn add -host default $gw && break done [[ -z $rtsolif ]] && stripcom /etc/mygate | while read gw; do [[ $gw == !(*:*) ]] && continue route -qn delete -inet6 default >/dev/null 2>&1 route -qn add -host -inet6 default $gw && break done } # Make sure the invoking user has the right privileges. if (($(id -u) != 0)); then echo "${0##*/}: need root privileges" exit 1 fi # Get network related vars from rc.conf using the parsing routine from rc.subr. FUNCS_ONLY=1 . /etc/rc.d/rc.subr _rc_parse_conf # If we were invoked with a list of interface names, just reconfigure these # interfaces (or bridges), add default routes and return. if (($# > 0)); then for _if; do ifstart $_if; done ifv6autoconf defaultroute return fi # Otherwise, process with the complete network initialization. # /etc/myname contains my symbolic name. [[ -f /etc/myname ]] && hostname "$(stripcom /etc/myname)" # Set the address for the loopback interface. Bringing the interface up, # automatically invokes the IPv6 address ::1. ifconfig lo0 inet 127.0.0.1/8 if ifconfig lo0 inet6 >/dev/null 2>&1; then # IPv6 configurations. ip6kernel=YES # Disallow link-local unicast dest without outgoing scope identifiers. route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject >/dev/null # Disallow site-local unicast dest without outgoing scope identifiers. # If you configure site-locals without scope id (it is permissible # config for routers that are not on scope boundary), you may want # to comment the line out. route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject >/dev/null # Disallow "internal" addresses to appear on the wire. route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject >/dev/null # Disallow packets to malicious IPv4 compatible prefix. route -qn add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject >/dev/null route -qn add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject >/dev/null route -qn add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject >/dev/null route -qn add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject >/dev/null # Disallow packets to malicious 6to4 prefix. route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject >/dev/null route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject >/dev/null route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject >/dev/null route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject >/dev/null # Disallow packets without scope identifier. route -qn add -inet6 ff01:: -prefixlen 16 ::1 -reject >/dev/null route -qn add -inet6 ff02:: -prefixlen 16 ::1 -reject >/dev/null # Completely disallow packets to IPv4 compatible prefix. # # This may conflict with RFC1933 under following circumstances: # (1) An IPv6-only KAME node tries to originate packets to IPv4 # compatible destination. The KAME node has no IPv4 compatible # support. Under RFC1933, it should transmit native IPv6 # packets toward IPv4 compatible destination, hoping it would # reach a router that forwards the packet toward auto-tunnel # interface. # (2) An IPv6-only node originates a packet to an IPv4 compatible # destination. A KAME node is acting as an IPv6 router, and # asked to forward it. # # Due to rare use of IPv4 compatible addresses, and security issues # with it, we disable it by default. route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject >/dev/null rtsolif="" else ip6kernel=NO fi # Configure all the non-loopback interfaces which we know about, but # do not start interfaces which must be delayed. Refer to hostname.if(5) ifmstart "" "trunk svlan vlan carp gif gre pfsync pppoe tun bridge switch pflow" # The trunk interfaces need to come up first in this list. # The (s)vlan interfaces need to come up after trunk. # Configure all the carp interfaces which we know about before default route. ifmstart "trunk svlan vlan carp" # Now that $rtsolif has been populated, IPv6 autoconf those interfaces ifv6autoconf # Look for default routes in /etc/mygate. defaultroute # Multicast routing. if [[ $multicast != YES ]]; then route -qn delete 224.0.0.0/4 >/dev/null 2>&1 route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null fi # Configure PPPoE, GIF, GRE, TUN and PFLOW interfaces, delayed because they # require routes to be set. TUN might depend on PPPoE, and GIF or GRE may # depend on either of them. PFLOW might bind to ip addresses configured # on either of them. ifmstart "pppoe tun gif gre bridge switch pflow" # Reject 127/8 other than 127.0.0.1. route -qn add -net 127 127.0.0.1 -reject >/dev/null if [[ $ip6kernel == YES ]]; then # This is to make sure DAD is completed before going further. count=0 while ((count++ < 10 && $(sysctl -n net.inet6.ip6.dad_pending) != 0)); do sleep 1 done fi