397 lines
9 KiB
Bash
397 lines
9 KiB
Bash
#!/bin/sh /etc/rc.common
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# Copyright (C) 2007 OpenWrt.org
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START=60
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DNS_SERVERS=""
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DOMAIN=""
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dhcp_calc() {
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local ip="$1"
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local res=0
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while [ -n "$ip" ]; do
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part="${ip%%.*}"
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res="$(($res * 256))"
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res="$(($res + $part))"
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[ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
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done
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echo "$res"
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}
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append_bool() {
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local section="$1"
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local option="$2"
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local value="$3"
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local _loctmp
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config_get_bool _loctmp "$section" "$option" 0
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[ $_loctmp -gt 0 ] && append args "$value"
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}
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append_parm() {
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local section="$1"
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local option="$2"
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local switch="$3"
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local _loctmp
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config_get _loctmp "$section" "$option"
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[ -z "$_loctmp" ] && return 0
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append args "$switch $_loctmp"
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}
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append_server() {
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append args "-S $1"
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}
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append_interface() {
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local ifname=$(uci_get_state network "$1" ifname "$1")
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append args "-i $ifname"
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}
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append_notinterface() {
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local ifname=$(uci_get_state network "$1" ifname "$1")
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append args "-I $ifname"
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}
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append_addnhosts() {
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append args "-H $1"
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}
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append_bogusnxdomain() {
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append args "-B $1"
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}
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dnsmasq() {
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local cfg="$1"
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append_bool "$cfg" authoritative "-K"
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append_bool "$cfg" nodaemon "-d"
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append_bool "$cfg" domainneeded "-D"
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append_bool "$cfg" filterwin2k "-f"
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append_bool "$cfg" nohosts "-h"
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append_bool "$cfg" nonegcache "-N"
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append_bool "$cfg" strictorder "-o"
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append_bool "$cfg" logqueries "-q"
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append_bool "$cfg" noresolv "-R"
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append_bool "$cfg" localise_queries "-y"
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append_bool "$cfg" readethers "-Z"
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append_bool "$cfg" dbus "-1"
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append_bool "$cfg" boguspriv "-b"
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append_bool "$cfg" expandhosts "-E"
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append_bool "$cfg" enable_tftp "--enable-tftp"
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append_bool "$cfg" nonwildcard "-z"
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append_parm "$cfg" cachesize "-c"
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append_parm "$cfg" dnsforwardmax "-0"
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append_parm "$cfg" port "-p"
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append_parm "$cfg" ednspacket_max "-P"
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append_parm "$cfg" dhcpleasemax "-X"
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append_parm "$cfg" "queryport" "-Q"
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append_parm "$cfg" "domain" "-s"
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append_parm "$cfg" "local" "-S"
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config_list_foreach "$cfg" "server" append_server
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config_list_foreach "$cfg" "interface" append_interface
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config_list_foreach "$cfg" "notinterface" append_notinterface
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config_list_foreach "$cfg" "addnhosts" append_addnhosts
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config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
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append_parm "$cfg" "leasefile" "-l"
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append_parm "$cfg" "resolvfile" "-r"
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append_parm "$cfg" "tftp_root" "--tftp-root"
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append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
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config_get DOMAIN "$cfg" domain
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config_get_bool readethers "$cfg" readethers
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[ "$readethers" = "1" ] && [ -e "/etc/ethers" ] || touch /etc/ethers
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config_get leasefile $cfg leasefile
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[ -n "$leasefile" ] && [ -e "$leasefile" ] || touch "$leasefile"
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config_get_bool cachelocal "$cfg" cachelocal 1
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config_get hostsfile "$cfg" dhcphostsfile
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[ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
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local rebind
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config_get_bool rebind "$cfg" rebind_protection 1
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[ $rebind -gt 0 ] && {
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logger -t dnsmasq \
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"DNS rebinding protection is active," \
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"will discard upstream RFC1918 responses!"
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append args "--stop-dns-rebind"
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local rebind_localhost
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config_get_bool rebind_localhost "$cfg" rebind_localhost 0
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[ $rebind_localhost -gt 0 ] && {
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logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
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append args "--rebind-localhost-ok"
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}
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append_rebind_domain() {
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logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
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append args "--rebind-domain-ok=$1"
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}
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config_list_foreach "$cfg" rebind_domain append_rebind_domain
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}
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}
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dhcp_subscrid_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get subscriberid "$cfg" subscriberid
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[ -n "$subscriberid" ] || return 0
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append args "--dhcp-subscrid=$networkid,$subscriberid"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_remoteid_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get remoteid "$cfg" remoteid
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[ -n "$remoteid" ] || return 0
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append args "--dhcp-remoteid=$networkid,$remoteid"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_circuitid_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get circuitid "$cfg" circuitid
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[ -n "$circuitid" ] || return 0
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append args "--dhcp-circuitid=$networkid,$circuitid"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_userclass_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get userclass "$cfg" userclass
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[ -n "$userclass" ] || return 0
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append args "--dhcp-userclass=$networkid,$userclass"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_vendorclass_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get vendorclass "$cfg" vendorclass
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[ -n "$vendorclass" ] || return 0
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append args "--dhcp-vendorclass=$networkid,$vendorclass"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_host_add() {
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local cfg="$1"
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config_get name "$cfg" name
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"
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config_get ip "$cfg" ip
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[ -n "$ip" ] || return 0
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macs=""
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config_get mac "$cfg" mac
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for m in $mac; do append macs "$m" ","; done
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[ -n "$macs" ] || return 0
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append args "--dhcp-host=$macs,${networkid:+net:$networkid,}$ip${name:+,$name}"
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}
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dhcp_mac_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get mac "$cfg" mac
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[ -n "$mac" ] || return 0
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append args "--dhcp-mac=$networkid,$mac"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_boot_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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config_get filename "$cfg" filename
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[ -n "$filename" ] || return 0
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config_get servername "$cfg" servername
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[ -n "$servername" ] || return 0
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config_get serveraddress "$cfg" serveraddress
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[ -n "$serveraddress" ] || return 0
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append args "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_add() {
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local cfg="$1"
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config_get net "$cfg" interface
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[ -n "$net" ] || return 0
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || networkid="$net"
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config_get ifname "$net" ifname
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[ -n "$ifname" ] || return 0
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config_get dnsserver "$net" dns
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[ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
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DNS_SERVERS="$DNS_SERVERS $dnsserver"
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}
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append_bool "$cfg" ignore "-2 '$ifname'" && return 0
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config_get proto "$net" proto
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[ static = "$proto" ] || return 0
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config_get ipaddr "$net" ipaddr
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config_get netmask "$cfg" netmask
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[ -n "$netmask" ] || config_get netmask "$net" netmask
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#check for an already active dhcp server on the interface, unless 'force' is set
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config_get_bool force "$cfg" force 0
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[ $force -gt 0 ] || {
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udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && return 0
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}
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config_get start "$cfg" start
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config_get limit "$cfg" limit
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config_get leasetime "$cfg" leasetime
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config_get options "$cfg" options
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config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
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leasetime="${leasetime:-12h}"
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start="$(dhcp_calc "${start:-100}")"
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limit="${limit:-150}"
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eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
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if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
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append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_option_add() {
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local cfg="$1"
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local networkid="$2"
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config_get dhcp_option "$cfg" dhcp_option
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for o in $dhcp_option; do
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append args "-O $networkid","$o"
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done
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}
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dhcp_domain_add() {
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local cfg="$1"
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local ip name names
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config_get names "$cfg" name
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[ -n "$names" ] || return 0
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config_get ip "$cfg" ip
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[ -n "$ip" ] || return 0
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local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
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local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
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for name in $names; do
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local fqdn="$name"
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[ "${fqdn%.*}" == "$fqdn" ] && \
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fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
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append args "-A /$fqdn/$ip"
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[ -n "$raddr" ] && {
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append args "--ptr-record=$raddr,$fqdn"
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raddr=""
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}
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done
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}
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dhcp_srv_add() {
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local cfg="$1"
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config_get srv "$cfg" srv
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[ -n "$srv" ] || return 0
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config_get target "$cfg" target
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[ -n "$target" ] || return 0
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config_get port "$cfg" port
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local service="$srv,$target"
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[ -n "$port" ] && service="$service,$port"
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append args "-W $service"
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}
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start() {
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include /lib/network
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scan_interfaces
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config_load dhcp
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args=""
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config_foreach dnsmasq dnsmasq
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config_foreach dhcp_host_add host
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config_foreach dhcp_boot_add boot
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config_foreach dhcp_mac_add mac
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config_foreach dhcp_vendorclass_add vendorclass
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config_foreach dhcp_userclass_add userclass
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config_foreach dhcp_circuitid_add circuitid
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config_foreach dhcp_remoteid_add remoteid
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config_foreach dhcp_subscrid_add subscrid
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config_foreach dhcp_domain_add domain
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config_foreach dhcp_srv_add srvhost
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config_foreach dhcp_add dhcp
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/usr/sbin/dnsmasq $args && {
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rm -f /tmp/resolv.conf
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[ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
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DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
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for DNS_SERVER in $DNS_SERVERS ; do
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echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
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done
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}
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}
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stop() {
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[ -f /tmp/resolv.conf ] && {
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rm -f /tmp/resolv.conf
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ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
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}
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killall dnsmasq
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return 0
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}
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