| 1 | #!/bin/sh |
| 2 | [ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1 |
| 3 | |
| 4 | . /etc/functions.sh |
| 5 | include /lib/network |
| 6 | RESOLV_CONF="/tmp/resolv.conf.auto" |
| 7 | |
| 8 | change_state () { |
| 9 | [ -n "$ifc" ] || return |
| 10 | uci_revert_state "$1" "$2" "$3" "$4" |
| 11 | uci_set_state "$1" "$2" "$3" "$4" |
| 12 | } |
| 13 | |
| 14 | set_classless_routes() { |
| 15 | local max=128 |
| 16 | local type |
| 17 | while [ -n "$1" -a -n "$2" -a $max -gt 0 ]; do |
| 18 | [ ${1##*/} -eq 32 ] && type=host || type=net |
| 19 | echo "udhcpc: adding route for $type $1 via $2" |
| 20 | route add -$type "$1" gw "$2" dev "$interface" |
| 21 | max=$(($max-1)) |
| 22 | shift 2 |
| 23 | done |
| 24 | } |
| 25 | |
| 26 | setup_interface () { |
| 27 | local old_ip |
| 28 | local old_broadcast |
| 29 | local old_subnet |
| 30 | local old_router |
| 31 | local old_dns |
| 32 | local user_dns |
| 33 | local user_router |
| 34 | local user_metric |
| 35 | |
| 36 | [ -n "$ifc" ] && { |
| 37 | old_ip="$(uci_get_state network "$ifc" ipaddr)" |
| 38 | old_broadcast="$(uci_get_state network "$ifc" broadcast)" |
| 39 | old_subnet="$(uci_get_state network "$ifc" netmask)" |
| 40 | } |
| 41 | |
| 42 | [ "$ip" != "$old_ip" ] \ |
| 43 | || [ "${broadcast:-+}" != "$old_broadcast" ] \ |
| 44 | || [ "${subnet:-255.255.255.0}" != "$old_subnet" ] && { |
| 45 | echo "udhcpc: ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}" |
| 46 | ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+} |
| 47 | |
| 48 | change_state network "$ifc" ipaddr "$ip" |
| 49 | change_state network "$ifc" broadcast "${broadcast:-+}" |
| 50 | change_state network "$ifc" netmask "${subnet:-255.255.255.0}" |
| 51 | } |
| 52 | |
| 53 | |
| 54 | # Default Route |
| 55 | [ -n "$ifc" ] && { |
| 56 | change_state network "$ifc" lease_gateway "$router" |
| 57 | old_router="$(uci_get_state network "$ifc" gateway)" |
| 58 | user_router="$(uci_get network "$ifc" gateway)" |
| 59 | user_metric="$(uci_get network "$ifc" metric)" |
| 60 | [ -n "$user_router" ] && router="$user_router" |
| 61 | } |
| 62 | |
| 63 | [ -n "$router" ] && [ "$router" != "0.0.0.0" ] && [ "$router" != "255.255.255.255" ] && [ "$router" != "$old_router" ] && { |
| 64 | echo "udhcpc: setting default routers: $router" |
| 65 | |
| 66 | local valid_gw="" |
| 67 | for i in $router ; do |
| 68 | route add default gw $i ${user_metric:+metric $user_metric} dev $interface |
| 69 | valid_gw="${valid_gw:+$valid_gw|}$i" |
| 70 | done |
| 71 | |
| 72 | eval $(route -n | awk ' |
| 73 | /^0.0.0.0\W{9}('$valid_gw')\W/ {next} |
| 74 | /^0.0.0.0/ {print "route del -net "$1" gw "$2";"} |
| 75 | ') |
| 76 | |
| 77 | change_state network "$ifc" gateway "$router" |
| 78 | } |
| 79 | |
| 80 | # CIDR STATIC ROUTES (rfc3442) |
| 81 | [ -n "$staticroutes" ] && set_classless_routes $staticroutes |
| 82 | [ -n "$msstaticroutes" ] && set_classless_routes $msstaticroutes |
| 83 | |
| 84 | # DNS |
| 85 | old_dns=$(uci_get_state network "$ifc" dns) |
| 86 | old_domain=$(uci_get_state network "$ifc" dnsdomain) |
| 87 | user_dns=$(uci_get "network.$ifc.dns") |
| 88 | [ -n "$user_dns" ] && dns="$user_dns" |
| 89 | |
| 90 | [ -n "$dns" ] && [ "$dns" != "$old_dns" -o -n "$user_dns" ] && { |
| 91 | echo "udhcpc: setting dns servers: $dns" |
| 92 | add_dns "$ifc" $dns |
| 93 | |
| 94 | [ -n "$domain" ] && [ "$domain" != "$old_domain" ] && { |
| 95 | echo "udhcpc: setting dns domain: $domain" |
| 96 | sed -i -e "${old_domain:+/^search $old_domain$/d; }/^search $domain$/d" "${RESOLV_CONF}" |
| 97 | echo "search $domain" >> "${RESOLV_CONF}" |
| 98 | change_state network "$ifc" dnsdomain "$domain" |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | [ -n "$ifc" ] || return |
| 103 | |
| 104 | # UCI State |
| 105 | change_state network "$ifc" lease_server "$serverid" |
| 106 | change_state network "$ifc" lease_acquired "$(sed -ne 's![^0-9].*$!!p' /proc/uptime)" |
| 107 | change_state network "$ifc" lease_lifetime "$lease" |
| 108 | [ -n "$ntpsrv" ] && change_state network "$ifc" lease_ntpsrv "$ntpsrv" |
| 109 | [ -n "$timesvr" ] && change_state network "$ifc" lease_timesrv "$timesvr" |
| 110 | [ -n "$hostname" ] && change_state network "$ifc" lease_hostname "$hostname" |
| 111 | [ -n "$timezone" ] && change_state network "$ifc" lease_timezone "$timezone" |
| 112 | |
| 113 | |
| 114 | # Hotplug |
| 115 | env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface |
| 116 | } |
| 117 | |
| 118 | |
| 119 | scan_interfaces |
| 120 | applied= |
| 121 | for ifc in $interfaces __default; do |
| 122 | if [ "$ifc" = __default ]; then |
| 123 | ifc="" |
| 124 | [ -n "$applied" ] && continue |
| 125 | else |
| 126 | config_get ifname "$ifc" ifname |
| 127 | [ "$ifname" = "$interface" ] || continue |
| 128 | |
| 129 | config_get proto "$ifc" proto |
| 130 | [ "$proto" = "dhcp" ] || continue |
| 131 | applied=true |
| 132 | fi |
| 133 | |
| 134 | case "$1" in |
| 135 | deconfig) |
| 136 | ifconfig "$interface" 0.0.0.0 |
| 137 | [ -n "$ifc" ] && { |
| 138 | env -i ACTION="ifdown" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface |
| 139 | |
| 140 | config_get device "$ifc" device |
| 141 | config_get ifname "$ifc" ifname |
| 142 | config_get aliases "$ifc" aliases |
| 143 | uci_revert_state network "$ifc" |
| 144 | [ -n "$device" ] && uci_set_state network "$ifc" device "$device" |
| 145 | [ -n "$ifname" ] && uci_set_state network "$ifc" ifname "$ifname" |
| 146 | [ -n "$aliases" ] && uci_set_state network "$ifc" aliases "$aliases" |
| 147 | } |
| 148 | ;; |
| 149 | renew) |
| 150 | setup_interface update |
| 151 | ;; |
| 152 | bound) |
| 153 | setup_interface ifup |
| 154 | ;; |
| 155 | esac |
| 156 | done |
| 157 | |
| 158 | # user rules |
| 159 | [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user |
| 160 | |
| 161 | exit 0 |
| 162 | |
