modules.d/40network/net-lib.sh

   1 #!/bin/sh
   2
   3 get_ip() {
   4     local iface="$1" ip=""
   5     ip=$(ip -o -f inet addr show $iface)
   6     ip=${ip%%/*}
   7     ip=${ip##* }
   8 }
   9
  10 iface_for_remote_addr() {
  11     set -- $(ip -o route get to $1)
  12     echo $5
  13 }
  14
  15 iface_for_mac() {
  16     local interface="" mac="$(echo $1 | tr '[:upper:]' '[:lower:]')"
  17     for interface in /sys/class/net/*; do
  18         if [ $(cat $interface/address) = "$mac" ]; then
  19             echo ${interface##*/}
  20         fi
  21     done
  22 }
  23
  24 iface_has_link() {
  25     local interface="$1" flags=""
  26     [ -n "$interface" ] || return 2
  27     interface="/sys/class/net/$interface"
  28     [ -d "$interface" ] || return 2
  29     flags=$(cat $interface/flags)
  30     echo $(($flags|0x41)) > $interface/flags # 0x41: IFF_UP|IFF_RUNNING
  31     [ "$(cat $interface/carrier)" = 1 ] || return 1
  32     # XXX Do we need to reset the flags here? anaconda never bothered..
  33 }
  34
  35 all_ifaces_up() {
  36     local iface="" IFACES=""
  37     [ -e "/tmp/net.ifaces" ] && read IFACES < /tmp/net.ifaces
  38     for iface in $IFACES; do
  39         [ -e /tmp/net.$iface.up ] || return 1
  40     done
  41 }
  42
  43 get_netroot_ip() {
  44     local prefix="" server="" rest=""
  45     splitsep "$1" ":" prefix server rest
  46     case $server in
  47         [0-9]*\.[0-9]*\.[0-9]*\.[0-9]*) echo "$server"; return 0 ;;
  48     esac
  49     return 1
  50 }
  51
  52 ip_is_local() {
  53     strstr "$(ip route get $1 2>/dev/null)" " via "
  54 }
  55
  56 ifdown() {
  57     local netif="$1"
  58     # ip down/flush ensures that routing info goes away as well
  59     ip link set $netif down
  60     ip addr flush dev $netif
  61     echo "#empty" > /etc/resolv.conf
  62     # TODO: send "offline" uevent?
  63 }
  64
  65 setup_net() {
  66     local netif="$1" f="" gw_ip="" netroot_ip="" iface="" IFACES=""
  67     [ -e /tmp/net.$netif.up ] || return 1
  68     [ -e "/tmp/net.ifaces" ] && read IFACES < /tmp/net.ifaces
  69     [ -z "$IFACES" ] && IFACES="$netif"
  70     for iface in $IFACES ; do
  71         . /tmp/net.$iface.up
  72     done
  73     # run the scripts written by ifup
  74     [ -e /tmp/net.$netif.gw ]            && . /tmp/net.$netif.gw
  75     [ -e /tmp/net.$netif.hostname ]      && . /tmp/net.$netif.hostname
  76     [ -e /tmp/net.$netif.override ]      && . /tmp/net.$netif.override
  77     [ -e /tmp/dhclient.$netif.dhcpopts ] && . /tmp/dhclient.$netif.dhcpopts
  78     # set up resolv.conf
  79     [ -e /tmp/net.$netif.resolv.conf ] && \
  80         cp -f /tmp/net.$netif.resolv.conf /etc/resolv.conf
  81
  82     # Handle STP Timeout: arping the default gateway.
  83     # (or the root server, if a) it's local or b) there's no gateway.)
  84     # Note: This assumes that if no router is present the
  85     # root server is on the same subnet.
  86
  87     # Get DHCP-provided router IP, or the cmdline-provided "gw=" argument
  88     [ -n "$new_routers" ] && gw_ip=${new_routers%%,*}
  89     [ -n "$gw" ] && gw_ip=$gw
  90
  91     # Get the "netroot" IP (if there's an IP address in there)
  92     netroot_ip=$(get_netroot_ip $netroot)
  93
  94     # try netroot if it's local (or there's no gateway)
  95     if ip_is_local $netroot_ip || [ -z "$gw_ip" ]; then
  96         dest="$netroot_ip"
  97     else
  98         dest="$gw_ip"
  99     fi
 100     if [ -n "$dest" ] && ! arping -q -f -w 60 -I $netif $dest ; then
 101         info "Resolving $dest via ARP on $netif failed"
 102     fi
 103 }
 104
 105 set_ifname() {
 106     local name="$1" mac="$2" num=0 n=""
 107     # if it's already set, return the existing name
 108     for n in $(getargs ifname=); do
 109         strstr "$n" "$mac" && echo ${n%%:*} && return
 110     done
 111     # otherwise, pick a new name and use that
 112     while [ -e /sys/class/$name$num ]; do num=$(($num+1)); done
 113     echo "ifname=$name$num:$mac" >> /etc/cmdline.d/45-ifname.conf
 114     echo "$name$num"
 115 }
 116
 117 ibft_to_cmdline() {
 118     local iface="" mac="" dev=""
 119     local dhcp="" ip="" gw="" mask="" hostname=""
 120     modprobe -q iscsi_ibft
 121     (
 122         for iface in /sys/firmware/ibft/ethernet*; do
 123             [ -e ${iface}/mac ] || continue
 124             mac=$(read a < ${iface}/mac; echo $a)
 125             [ -z "$ifname_mac" ] && continue
 126             dev=$(set_ifname ibft $ifname_mac)
 127             dhcp=$(read a < ${iface}/dhcp; echo $a)
 128             if [ -n "$dhcp" ]; then
 129                 echo "ip=$dev:dhcp"
 130             else
 131                 ip=$(read a < ${iface}/ip-addr; echo $a)
 132                 gw=$(read a < ${iface}/gateway; echo $a)
 133                 mask=$(read a < ${iface}/subnet-mask; echo $a)
 134                 hostname=$(read a < ${iface}/hostname; echo $a)
 135                 echo "ip=$ip::$gw:$mask:$hostname:$dev:none"
 136             fi
 137         done
 138     ) >> /etc/cmdline.d/40-ibft.conf
 139     # reread cmdline
 140     unset CMDLINE
 141 }
 142
 143 parse_iscsi_root()
 144 {
 145     local v
 146     v=${1#iscsi:}
 147
 148 # extract authentication info
 149     case "$v" in
 150         *@*:*:*:*:*)
 151             authinfo=${v%%@*}
 152             v=${v#*@}
 153     # allow empty authinfo to allow having an @ in iscsi_target_name like this:
 154     # netroot=iscsi:@192.168.1.100::3260::iqn.2009-01.com.example:testdi@sk
 155             if [ -n "$authinfo" ]; then
 156                 OLDIFS="$IFS"
 157                 IFS=:
 158                 set $authinfo
 159                 IFS="$OLDIFS"
 160                 if [ $# -gt 4 ]; then
 161                     warn "Wrong authentication info in iscsi: parameter!"
 162                     return 1
 163                 fi
 164                 iscsi_username=$1
 165                 iscsi_password=$2
 166                 if [ $# -gt 2 ]; then
 167                     iscsi_in_username=$3
 168                     iscsi_in_password=$4
 169                 fi
 170             fi
 171             ;;
 172     esac
 173
 174 # extract target ip
 175     case "$v" in
 176         [[]*[]]:*)
 177             iscsi_target_ip=${v#[[]}
 178                 iscsi_target_ip=${iscsi_target_ip%%[]]*}
 179             v=${v#[[]$iscsi_target_ip[]]:}
 180             ;;
 181         *)
 182             iscsi_target_ip=${v%%[:]*}
 183             v=${v#$iscsi_target_ip:}
 184             ;;
 185     esac
 186
 187 # extract target name
 188     case "$v" in
 189         *:iqn.*)
 190             iscsi_target_name=iqn.${v##*:iqn.}
 191             v=${v%:iqn.*}:
 192             ;;
 193         *:eui.*)
 194             iscsi_target_name=iqn.${v##*:eui.}
 195             v=${v%:iqn.*}:
 196             ;;
 197         *:naa.*)
 198             iscsi_target_name=iqn.${v##*:naa.}
 199             v=${v%:iqn.*}:
 200             ;;
 201         *)
 202             warn "Invalid iscii target name, should begin with 'iqn.' or 'eui.' or 'naa.'"
 203             return 1
 204             ;;
 205     esac
 206
 207 # parse the rest
 208     OLDIFS="$IFS"
 209     IFS=:
 210     set $v
 211     IFS="$OLDIFS"
 212
 213     iscsi_protocol=$1; shift # ignored
 214     iscsi_target_port=$1; shift
 215     if [ $# -eq 3 ]; then
 216         iscsi_iface_name=$1; shift
 217     fi
 218     if [ $# -eq 2 ]; then
 219         iscsi_netdev_name=$1; shift
 220     fi
 221     iscsi_lun=$1; shift
 222     if [ $# -ne 0 ]; then
 223         warn "Invalid parameter in iscsi: parameter!"
 224         return 1
 225     fi
 226 }
 227
 228 ip_to_var() {
 229     local v=${1}:
 230     local i
 231     set --
 232     while [ -n "$v" ]; do
 233         if [ "${v#\[*:*:*\]:}" != "$v" ]; then
 234             # handle IPv6 address
 235             i="${v%%\]:*}"
 236             i="${i##\[}"
 237             set -- "$@" "$i"
 238             v=${v#\[$i\]:}
 239         else
 240             set -- "$@" "${v%%:*}"
 241             v=${v#*:}
 242         fi
 243     done
 244
 245     unset ip srv gw mask hostname dev autoconf macaddr mtu
 246     case $# in
 247         0)  autoconf="error" ;;
 248         1)  autoconf=$1 ;;
 249         2)  dev=$1; autoconf=$2 ;;
 250         3)  dev=$1; autoconf=$2; mtu=$3 ;;
 251         4)  dev=$1; autoconf=$2; mtu=$3; macaddr=$4 ;;
 252         *)  ip=$1; srv=$2; gw=$3; mask=$4; hostname=$5; dev=$6; autoconf=$7; mtu=$8; macaddr=$9 ;;
 253     esac
 254 }