201 lines
5.1 KiB
Bash
Executable File
201 lines
5.1 KiB
Bash
Executable File
#!/bin/sh
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set -e
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PREREQS=""
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case $1 in
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prereqs) echo "${PREREQS}"; exit 0;;
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esac
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. /scripts/functions
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PATH=/usr/sbin:/usr/bin:/sbin:/bin
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# doc in klibc-utils /usr/share/doc/libklibc/README.ipconfig.gz
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# example below:
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#DEVICE='eth0'
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#PROTO='dhcp' ## none, off, static. not present in precise
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#IPV4ADDR='192.168.122.89'
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#IPV4BROADCAST='192.168.122.255'
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#IPV4NETMASK='255.255.255.0'
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#IPV4GATEWAY='192.168.122.1'
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#IPV4DNS0='192.168.122.1' ## only come from dhcp
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#IPV4DNS1='0.0.0.0'
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#HOSTNAME=''
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#DNSDOMAIN=''
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#NISDOMAIN=''
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#ROOTSERVER='192.168.122.1'
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#ROOTPATH=''
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#filename=''
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#UPTIME='21'
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#DHCPLEASETIME='3600'
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#DOMAINSEARCH=''
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# superseded by isc-dhcp and such writing the file and supporting IPv6:
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#DEVICE=eno1
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#HOSTNAME=
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#DNSDOMAIN=
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#reason='PREINIT'
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#interface='eno1'
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#DEVICE=eno1
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#HOSTNAME=
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#DNSDOMAIN=
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#reason='FAIL'
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#interface='eno1'
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#DEVICE=eno1
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#HOSTNAME=
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#DNSDOMAIN=
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#reason='PREINIT6'
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#interface='eno1'
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#DEVICE=eno1
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#IPV6PROTO=dhcp6
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#IPV6ADDR=2001:67c:1562:8010:1::4324
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#IPV6NETMASK=64
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#IPV6DNS0=2001:67c:1562:8010::2:1
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#IPV6DOMAINSEARCH=
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#HOSTNAME=
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#DNSDOMAIN=
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#reason='BOUND6'
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#interface='eno1'
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#new_ip6_address='2001:67c:1562:8010:1::4324'
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#new_ip6_prefixlen='64'
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#new_dhcp6_name_servers='2001:67c:1562:8010::2:1'
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error() { echo "${0##*/}:" "$@" 1>&2; }
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configure_net_if_needed() {
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# we want to call configure_networking if and only if ip= was seen
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# on the command line (LP: #1463846)
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local ip="$1"
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# empty 'ip' or ip=none or ip=off specifically mean do not bring up
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if [ -z "$ip" ]; then
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return 0
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fi
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case "$ip" in
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none|off) return 0;;
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esac
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# configure_networking does not set any flags indicating it tried
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# to run and failed, so we can only look for indication
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# that ipconfig ran, which creates files in /run/net-<device>.conf
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#
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# configure_networking does a check like this. however, its check is
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# broken in the event that BOOTIF is not found on the command line.
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for f in /run/net-*.conf /tmp/net-*.conf; do
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if [ -f "$f" ]; then
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return 0
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fi
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done
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configure_networking
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}
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ni_header() {
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echo "## This file is generated by cloud-initramfs-dyn-netconf"
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echo "auto lo"
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echo "iface lo inet loopback"
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}
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configure_net_if_needed "$IP" ||
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echo "WARN: ${0##*/}: configure_networking failed" 1>&2
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tmpf="/tmp/${0##*/}.ni"
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ni_header > "$tmpf"
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seen=","
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for f in /run/net-*.conf /tmp/net-*.conf /run/net6-*.conf; do
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[ -f "$f" ] || continue
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dev=${f#*/net-}; dev=${dev%.conf};
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# perhaps we saw this device from /run and now we're in /tmp
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[ "${seen#*,${dev},}" = "${seen}" ] || continue
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seen="${seen}${dev},"
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DEVICE=""; PROTO=""; IPV4ADDR=""; IPV4NETMASK=""; IPV4GATEWAY="";
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IPV4DNS0=""; IPV4DNS1=""; DNSDOMAIN=""; DOMAINSEARCH=""; filename="";
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DEVICE6=""; IPV4PROTO=""; IPV6PROTO=""; IPV6ADDR=""; IPV6NETMASK="";
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IPV6GATEWAY=""; IPV6DNS0=""; IPV6DNS1=""; IPV6DOMAINSEARCH="";
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. "$f"
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if [ -z "$DEVICE" ]; then
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if [ -z "$DEVICE6" ]; then
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error "WARNING: $f had no 'DEVICE' or 'DEVICE6' set"
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continue
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else
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DEVICE="$DEVICE6"
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fi
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fi
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# If IPv6 is supported, we get both of these, and at least one of them
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# is set. If we get both, use IPv4.
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# Prior to that, PROTO was used, so we know it's IPv4 we want.
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if [ -z "$IPV4PROTO" -a -z "$IPV6PROTO" ]; then
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IPV4PROTO="$PROTO"
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fi
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# ipconfig on precise does not write PROTO.
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if [ -z "$IPV4PROTO" -a -z "$IPV6PROTO" ]; then
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if [ -n "$filename" ]; then
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IPV4PROTO="dhcp"
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else
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IPV4PROTO="static"
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fi
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fi
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# We need to use care, since the script is running set -e.
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echo "manual $DEVICE"
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if [ "$IPV4PROTO" = "dhcp" ]; then
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echo "iface $DEVICE inet dhcp"
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elif [ "$IPV4PROTO" = "static" ]; then
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echo "iface $DEVICE inet static"
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if [ -n "$IPV4ADDR" ]; then
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printf "\t%s\n" "address $IPV4ADDR"
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else
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error "WARNING: $f static with no address"
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fi
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if [ -n "$IPV4NETMASK" ]; then
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printf "\t%s\n" "netmask $IPV4NETMASK"
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else
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error "WARNING: $f static with no netmask"
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fi
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if [ -n "$IPV4GATEWAY" ]; then
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printf "\t%s\n" "gateway $IPV4GATEWAY"
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fi
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elif [ "$IPV6PROTO" = "dhcp6" ]; then
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echo "iface $DEVICE inet6 dhcp"
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elif [ "$IPV6PROTO" = "static" ]; then
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echo "iface $DEVICE inet6 static"
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if [ -n "$IPV6ADDR" ]; then
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printf "\t%s\n" "address $IPV6ADDR"
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else
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error "WARNING: $f static with no address"
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fi
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if [ -n "$IPV6NETMASK" ]; then
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printf "\t%s\n" "netmask $IPV6NETMASK"
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else
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error "WARNING: $f static with no netmask"
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fi
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if [ -n "$IPV6GATEWAY" ]; then
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printf "\t%s\n" "gateway $IPV6GATEWAY"
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fi
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fi
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nsline=""
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if [ -n "$IPV4DNS0" -a "$IPV4DNS0" != "0.0.0.0" ]; then
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nsline="${IPV4DNS0}"
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if [ -n "$IPV4DNS1" -a "$IPV4DNS1" = "0.0.0.0" ]; then
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nsline="${nsline} ${IPV4DNS1}"
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fi
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elif [ -n "$IPV6DNS0" ]; then
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nsline="${nsline} ${IPV6DNS0}"
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[ -z "$IPV6DNS1" ] || nsline="${nsline} ${IPV6DNS1}"
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fi
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[ -z "$nsline" ] || printf "\tdns-nameservers %s\n" "$nsline"
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if [ -n "${DNSDOMAIN}${DOMAINSEARCH}${IPV6DOMAINSEARCH}" ]; then
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SEARCH=" ${DNSDOMAIN} ${DOMAINSEARCH} ${IPV6DOMAINSEARCH}"
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printf "\tdns-search %s\n" "${SEARCH}"
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fi
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done >> "$tmpf"
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[ -d /run/network ] || mkdir /run/network
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mv "$tmpf" /run/network/dynamic-interfaces
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# vi: ts=4 noexpandtab
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