4255ba175b
The program function in depend blocks is now able to search paths by itself. If passed multiple arguments or multiple calls, at least one of the arguments passed must be a program or a shell builtin (eg ip built into busybox). If a qualified path is specified, only that path will be checked, otherwise it will be checked as a builtin, then $PATH will be checked for the named binary (via type). Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
117 lines
2.8 KiB
Bash
117 lines
2.8 KiB
Bash
# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
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# Released under the 2-clause BSD license.
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_config_vars="$_config_vars link suffix relay"
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ip6to4_depend()
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{
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after interface
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program ip
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}
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ip6to4_pre_start()
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{
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# ALL interfaces run pre_start blocks, not just those with something
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# assigned, so we must check if we need to run on this interface before we
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# do so.
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local config
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eval config=\$config_${IFVAR}
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[ "$config" = "ip6to4" ] || return 0
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case " ${MODULES} " in
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*" ifconfig "*)
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if [ "${IFACE}" != "sit0" ]; then
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eerror "ip6to4 can only work on the sit0 interface using ifconfig"
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eerror "emerge sys-apps/iproute2 to use other interfaces"
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return 1
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fi
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esac
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local host= suffix= relay= addr= iface=${IFACE} config_ip6to4= localip=
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eval host=\$link_${IFVAR}
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if [ -z "${host}" ]; then
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eerror "link_${IFVAR} not set"
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return 1
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fi
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eval suffix=\${suffix_${IFVAR}:-1}
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eval relay=\${relay_${IFVAR}:-192.88.99.1}
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IFACE=${host}
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addrs=$(_get_inet_addresses)
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IFACE=${iface}
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if [ -z "${addrs}" ]; then
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eerror "${host} is not configured with an IPv4 address"
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return 1
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fi
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for addr in ${addrs}; do
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# Strip the subnet
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local ip="${addr%/*}" subnet="${addr#*/}"
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# We don't work on private IPv4 addresses
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case "${ip}" in
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127.*) continue;;
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10.*) continue;;
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192.168.*) continue;;
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172.*)
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local i=16
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while [ ${i} -lt 32 ]; do
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case "${ip}" in
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172.${i}.*) break;;
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esac
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: $(( i += 1 ))
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done
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[ ${i} -lt 32 ] && continue
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;;
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esac
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veinfo "IPv4 address on ${host}: ${ip}/${subnet}"
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local ipa= ip6= IFS="${IFS}."
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for i in ${ip}; do
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ipa="${ipa} ${i}"
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done
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unset IFS
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eval ip6="$(printf "2002:%02x%02x:%02x%02x::%s" ${ipa} ${suffix})"
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veinfo "Derived IPv6 address: ${ip6}"
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# Now apply our IPv6 address to our config
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config_ip6to4="${config_ip6to4}${config_ip6to4:+ }${ip6}/48"
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if [ -n "${localip}" ]; then
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localip="any"
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else
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localip="${ip}"
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fi
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done
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if [ -z "${config_ip6to4}" ]; then
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eerror "No global IPv4 addresses found on interface ${host}"
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return 1
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fi
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if [ "${IFACE}" != "sit0" ]; then
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ebegin "Creating 6to4 tunnel on ${IFACE}"
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_tunnel add "${IFACE}" mode sit ttl 255 remote any local "${localip}"
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eend $? || return 1
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_up
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fi
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routes_ip6to4="2003::/3 via ::${relay} metric 2147483647"
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service_set_value "config_ip6to4_$IFVAR" "$config_ip6to4"
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service_set_value "routes_ip6to4_$IFVAR" "$routes_ip6to4"
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}
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ip6to4_start()
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{
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local config_ip6to4=$(service_get_value "config_ip6to4_$IFVAR")
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local routes_ip6to4=$(service_get_value "routes_ip6to4_$IFVAR")
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# Now apply our config
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eval config_${config_index}=\'"${config_ip6to4}"\'
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: $(( config_index -= 1 ))
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# Add a route for us, ensuring we don't delete anything else
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local routes="$(_get_array "routes_${IFVAR}")
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$routes_ip6to4"
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eval routes_${IFVAR}=\$routes
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}
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