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    • /[pkg-src]/trunk/dracut/udhcpc-script.sh

    Annotation of /trunk/dracut/udhcpc-script.sh

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    Revision 3217 - (hide annotations) (download) (as text)
    Thu Aug 23 12:12:40 2018 UTC (5 years, 8 months ago) by niro
    File MIME type: application/x-sh
    File size: 9954 byte(s) 
    -added network scripts
    1 niro 3217 #!/bin/sh
    2    
    3     PATH=/usr/sbin:/usr/bin:/sbin:/bin
    4    
    5     type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
    6     type ip_to_var >/dev/null 2>&1 || . /lib/net-lib.sh
    7    
    8     # We already need a set netif here
    9     netif=$interface
    10    
    11     # setup udhcp environment variables
    12     reason=$1
    13     new_ip_address="$ip"
    14     new_interface_mtu="$mtu"
    15     new_subnet_mask="$mask"
    16     new_broadcast_address="$broadcast"
    17     new_routers="$router"
    18     new_domain_name="$domain"
    19     new_domain_search=""
    20     new_domain_name_servers="$dns"
    21     new_host_name="$hostname"
    22     new_dhcp_lease_time="$lease"
    23     new_max_life=""
    24     new_preferred_life=""
    25    
    26     setup_interface() {
    27     ip=$new_ip_address
    28     mtu=$new_interface_mtu
    29     mask=$new_subnet_mask
    30     bcast=$new_broadcast_address
    31     gw=${new_routers%%,*}
    32     domain=$new_domain_name
    33     search=$(printf -- "$new_domain_search")
    34     namesrv=$new_domain_name_servers
    35     hostname=$new_host_name
    36     [ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
    37     [ -n "$new_max_life" ] && lease_time=$new_max_life
    38     preferred_lft=$lease_time
    39     [ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life
    40    
    41     [ -f /tmp/net.$netif.override ] && . /tmp/net.$netif.override
    42    
    43     # Taken from debian dhclient-script:
    44     # The 576 MTU is only used for X.25 and dialup connections
    45     # where the admin wants low latency. Such a low MTU can cause
    46     # problems with UDP traffic, among other things. As such,
    47     # disallow MTUs from 576 and below by default, so that broken
    48     # MTUs are ignored, but higher stuff is allowed (1492, 1500, etc).
    49     if [ -n "$mtu" ] && [ $mtu -gt 576 ] ; then
    50     if ! ip link set $netif mtu $mtu ; then
    51     ip link set $netif down
    52     ip link set $netif mtu $mtu
    53     linkup $netif
    54     fi
    55     fi
    56    
    57     # lease time stuff not compatible with busybox ip command
    58     # ip addr add $ip${mask:+/$mask} ${bcast:+broadcast $bcast} dev $netif \
    59     # ${lease_time:+valid_lft $lease_time} \
    60     # ${preferred_lft:+preferred_lft ${preferred_lft}}
    61     ip addr add $ip${mask:+/$mask} ${bcast:+broadcast $bcast} dev $netif
    62    
    63     if [ -n "$gw" ] ; then
    64     if [ "$mask" = "255.255.255.255" ] ; then
    65     # point-to-point connection => set explicit route to gateway
    66     echo ip route add $gw dev $netif > /tmp/net.$netif.gw
    67     fi
    68    
    69     echo "$gw" | {
    70     IFS=' ' read -r main_gw other_gw
    71     echo ip route replace default via $main_gw dev $netif >> /tmp/net.$netif.gw
    72     if [ -n "$other_gw" ] ; then
    73     for g in $other_gw; do
    74     echo ip route add default via $g dev $netif >> /tmp/net.$netif.gw
    75     done
    76     fi
    77     }
    78     fi
    79    
    80     if getargbool 1 rd.peerdns; then
    81     [ -n "${search}${domain}" ] && echo "search $search $domain" > /tmp/net.$netif.resolv.conf
    82     if [ -n "$namesrv" ] ; then
    83     for s in $namesrv; do
    84     echo nameserver $s
    85     done
    86     fi >> /tmp/net.$netif.resolv.conf
    87     fi
    88     # Note: hostname can be fqdn OR short hostname, so chop off any
    89     # trailing domain name and explicity add any domain if set.
    90     [ -n "$hostname" ] && echo "echo ${hostname%.$domain}${domain:+.$domain} > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
    91     }
    92    
    93     setup_interface6() {
    94     domain=$new_domain_name
    95     search=$(printf -- "$new_domain_search")
    96     namesrv=$new_domain_name_servers
    97     hostname=$new_host_name
    98     [ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
    99     [ -n "$new_max_life" ] && lease_time=$new_max_life
    100     preferred_lft=$lease_time
    101     [ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life
    102    
    103     [ -f /tmp/net.$netif.override ] && . /tmp/net.$netif.override
    104    
    105     # lease time stuff not compatible with busybox ip command
    106     # ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
    107     # dev ${netif} scope global \
    108     # ${lease_time:+valid_lft $lease_time} \
    109     # ${preferred_lft:+preferred_lft ${preferred_lft}}
    110     ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
    111     dev ${netif} scope global
    112    
    113     if getargbool 1 rd.peerdns; then
    114     [ -n "${search}${domain}" ] && echo "search $search $domain" > /tmp/net.$netif.resolv.conf
    115     if [ -n "$namesrv" ] ; then
    116     for s in $namesrv; do
    117     echo nameserver $s
    118     done
    119     fi >> /tmp/net.$netif.resolv.conf
    120     fi
    121    
    122     # Note: hostname can be fqdn OR short hostname, so chop off any
    123     # trailing domain name and explicity add any domain if set.
    124     [ -n "$hostname" ] && echo "echo ${hostname%.$domain}${domain:+.$domain} > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
    125     }
    126    
    127     parse_option_121() {
    128     while [ $# -ne 0 ]; do
    129     mask="$1"
    130     shift
    131    
    132     # Is the destination a multicast group?
    133     if [ $1 -ge 224 -a $1 -lt 240 ]; then
    134     multicast=1
    135     else
    136     multicast=0
    137     fi
    138    
    139     # Parse the arguments into a CIDR net/mask string
    140     if [ $mask -gt 24 ]; then
    141     destination="$1.$2.$3.$4/$mask"
    142     shift; shift; shift; shift
    143     elif [ $mask -gt 16 ]; then
    144     destination="$1.$2.$3.0/$mask"
    145     shift; shift; shift
    146     elif [ $mask -gt 8 ]; then
    147     destination="$1.$2.0.0/$mask"
    148     shift; shift
    149     else
    150     destination="$1.0.0.0/$mask"
    151     shift
    152     fi
    153    
    154     # Read the gateway
    155     gateway="$1.$2.$3.$4"
    156     shift; shift; shift; shift
    157    
    158     # Multicast routing on Linux
    159     # - If you set a next-hop address for a multicast group, this breaks with Cisco switches
    160     # - If you simply leave it link-local and attach it to an interface, it works fine.
    161     if [ $multicast -eq 1 ]; then
    162     temp_result="$destination dev $interface"
    163     else
    164     temp_result="$destination via $gateway dev $interface"
    165     fi
    166    
    167     echo "/sbin/ip route add $temp_result"
    168     done
    169     }
    170    
    171    
    172     case $reason in
    173     PREINIT|preinit)
    174     echo "dhcp: PREINIT $netif up"
    175     linkup $netif
    176     ;;
    177    
    178     PREINIT6|preinit6)
    179     echo "dhcp: PREINIT6 $netif up"
    180     linkup $netif
    181     wait_for_ipv6_dad_link $netif
    182     ;;
    183    
    184     BOUND|bound)
    185     echo "dhcp: BOND setting $netif"
    186     unset layer2
    187     if [ -f /sys/class/net/$netif/device/layer2 ]; then
    188     read layer2 < /sys/class/net/$netif/device/layer2
    189     fi
    190     if [ "$layer2" != "0" ]; then
    191     if command -v arping2 >/dev/null; then
    192     if arping2 -q -C 1 -c 2 -I $netif -0 $new_ip_address ; then
    193     warn "Duplicate address detected for $new_ip_address while doing dhcp. retrying"
    194     exit 1
    195     fi
    196     else
    197     if ! arping -f -q -D -c 2 -I $netif $new_ip_address ; then
    198     warn "Duplicate address detected for $new_ip_address while doing dhcp. retrying"
    199     exit 1
    200     fi
    201     fi
    202     fi
    203     unset layer2
    204     setup_interface
    205     set | while read line || [ -n "$line" ]; do
    206     [ "${line#new_}" = "$line" ] && continue
    207     echo "$line"
    208     done >/tmp/udhcpc.$netif.dhcpopts
    209    
    210     {
    211     echo '. /lib/net-lib.sh'
    212     echo "setup_net $netif"
    213     if [ -n "$new_classless_static_routes" ]; then
    214     OLDIFS="$IFS"
    215     IFS=".$IFS"
    216     parse_option_121 $new_classless_static_routes
    217     IFS="$OLDIFS"
    218     fi
    219     echo "source_hook initqueue/online $netif"
    220     [ -e /tmp/net.$netif.manualup ] || echo "/sbin/netroot $netif"
    221     echo "rm -f -- $hookdir/initqueue/setup_net_$netif.sh"
    222     } > $hookdir/initqueue/setup_net_$netif.sh
    223    
    224     echo "[ -f /tmp/net.$netif.did-setup ]" > $hookdir/initqueue/finished/udhcpc-$netif.sh
    225     >/tmp/net.$netif.up
    226     if [ -e /sys/class/net/${netif}/address ]; then
    227     > /tmp/net.$(cat /sys/class/net/${netif}/address).up
    228     fi
    229    
    230     ;;
    231    
    232     RENEW|renew|REBIND|rebind)
    233     unset lease_time
    234     [ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
    235     [ -n "$new_max_life" ] && lease_time=$new_max_life
    236     preferred_lft=$lease_time
    237     [ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life
    238     ip -4 addr change ${new_ip_address}/${new_subnet_mask} broadcast ${new_broadcast_address} dev ${interface} \
    239     ${lease_time:+valid_lft $lease_time} ${preferred_lft:+preferred_lft ${preferred_lft}} \
    240     >/dev/null 2>&1
    241     ;;
    242    
    243     BOUND6|bound6)
    244     echo "dhcp: BOND6 setting $netif"
    245     setup_interface6
    246    
    247     set | while read line || [ -n "$line" ]; do
    248     [ "${line#new_}" = "$line" ] && continue
    249     echo "$line"
    250     done >/tmp/udhcpc.$netif.dhcpopts
    251    
    252     {
    253     echo '. /lib/net-lib.sh'
    254     echo "setup_net $netif"
    255     echo "source_hook initqueue/online $netif"
    256     [ -e /tmp/net.$netif.manualup ] || echo "/sbin/netroot $netif"
    257     echo "rm -f -- $hookdir/initqueue/setup_net_$netif.sh"
    258     } > $hookdir/initqueue/setup_net_$netif.sh
    259    
    260     echo "[ -f /tmp/net.$netif.did-setup ]" > $hookdir/initqueue/finished/udhcpc-$netif.sh
    261     >/tmp/net.$netif.up
    262     if [ -e /sys/class/net/${netif}/address ]; then
    263     > /tmp/net.$(cat /sys/class/net/${netif}/address).up
    264     fi
    265     ;;
    266    
    267     RENEW6|renew6|REBIND6|rebind6)
    268     unset lease_time
    269     [ -n "$new_dhcp_lease_time" ] && lease_time=$new_dhcp_lease_time
    270     [ -n "$new_max_life" ] && lease_time=$new_max_life
    271     preferred_lft=$lease_time
    272     [ -n "$new_preferred_life" ] && preferred_lft=$new_preferred_life
    273     ip -6 addr change ${new_ip6_address}/${new_ip6_prefixlen} dev ${interface} scope global \
    274     ${lease_time:+valid_lft $lease_time} ${preferred_lft:+preferred_lft ${preferred_lft}} \
    275     >/dev/null 2>&1
    276     ;;
    277    
    278     *) echo "dhcp: $reason";;
    279     esac
    280    
    281     exit 0