set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
-[[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
-
m() { printf "%s\n" "$*"; "$@"; }
+
+set-dynamic() {
+
+ reup=false
+ if [[ $cur_state == activated ]]; then
+ reup=true
+ fi
+
+ if [[ $cur_method != auto ]]; then
+ args+=(ipv4.method auto)
+ fi
+ if [[ $cur_ip != -- ]]; then
+ args+=(-ipv4.addresses "$ipv4_addresses")
+ fi
+ if [[ $cur_dns != -- ]]; then
+ args+=(-ipv4.dns "$ipv4_dns")
+ fi
+ if [[ $cur_gateway != -- ]]; then
+ # undocumented in t11 man nmcli. guessed randomly
+ args+=(ipv4.gateway 0.0.0.0)
+ fi
+ if (( ${#args[@]} >= 1 )); then
+ m nmcli con mod "$nm_con" "${args[@]}"
+ if $reup; then
+ m nmcli con up "$nm_con"
+ fi
+ else
+ echo "$0: found expected state, nothing to do."
+ fi
+ exit 0
+ set-nm
+}
+
+detect-net() {
+
+ # this assumes we have wifi up
+ if [[ $(timeout 1 dig +short @10.2.0.1 -x 10.2.0.2 2>&1 ||:) == kd.b8.nz. ]] \
+ && ip n show 10.2.0.1 | grep . &>/dev/null; then
+ net=home
+ elif ip r show default | grep 'via 10.0.3.1 dev wlan0' &>/dev/null && [[ $(timeout 1 dig +short @10.0.3.1 -x 10.0.3.1) == cmc1.lan. ]]; then
+ net=work
+ else
+ echo "$0: error could not detect network"
+ exit 1
+ fi
+
+}
+
+set-nm() {
+ m nmcli con mod "$nm_con" ipv4.method manual ipv4.addresses $ip ipv4.gateway $gateway ipv4.dns $dns
+ state=$(nmcli con show "$nm_con" 2>/dev/null | awk '$1 == "GENERAL.STATE:" {print $2}')
+ if [[ $state == activated ]]; then
+ m nmcli con up "$nm_con"
+ fi
+
+}
+
+get-ip() {
+
+ case $net in
+ home)
+
+ while read -r ip_suf host mac; do
+ if [[ ! $ip_suf || $ip_suf == \#* ]]; then
+ continue
+ fi
+ if [[ $mac != usb ]]; then
+ continue
+ fi
+ if [[ $host == ${HOSTNAME}c ]]; then
+
+ ip=10.2.0.$ip_suf/16
+ gateway=10.2.0.1
+ dns=8.8.8.4,8.8.8.8
+ break
+ fi
+ done </p/c/host-info
+
+ if [[ ! $ip_suf ]]; then
+ echo "$0: error: failed to find ${HOSTNAME}c ip suffix in /p/c/host-info"
+ exit 1
+ fi
+ ;;
+ work)
+
+ if ! ip r show default | grep 'via 192.168.0.1 dev eth' &>/dev/null; then
+ if [[ $cur_method != manual ]]; then
+ echo "$0: error. Need to be on wired network to get our ip"
+ exit 1
+ fi
+ set-dynamic
+ sleep 10
+ fi
+ myip=$(timeout 1 dig +short @192.168.0.25 $HOSTNAME.office.fsf.org)
+ if [[ ! $myip ]]; then
+ echo "$0: error: didnt detect home network and failed to get office ip"
+ exit 1
+ fi
+ dns=192.168.0.10,192.168.0.25
+ gateway=192.168.0.1
+ ip=$myip/24
+
+ ;;
+ esac
+}
+
+
+get-cur-val() {
+ local key
+ key=$1
+ printf "%s\n" "$tmpstr" | awk '$1 == "'$key':" {print $2}'
+}
+
+get-cur() {
+ tmpstr=$(nmcli con show "$nm_con" 2>/dev/null)
+
+ cur_method=$(get-cur-val ipv4.method)
+ cur_ip=$(get-cur-val ipv4.addresses)
+ cur_gateway=$(get-cur-val ipv4.gateway)
+ cur_dns=$(get-cur-val ipv4.dns)
+ cur_state=$(get-cur-val GENERAL.STATE)
+}
+
+
## begin arg parsing ##
force=false
-conf_only=false
-comment='# iank file id: ethusb-dhcp-v1'
off=false
while [[ $1 ]]; do
case $1 in
- -c)
- conf_only=true
- ;;
-f)
force=true
;;
off)
off=true
- comment='# iank file id: ethusb-static-v1'
;;
*)
echo "$0: error unexpected argument: $1" >&2
## end arg parsing ##
-
+## begin common setup / detection ##
shopt -s nullglob
-# we already configured the interface once, afterwards, comment and
-# uncomment to enable/disable. This makes it so we don't depend on /p
-# being mounted.
+wiredx=1
+declare -a args
-conf=/etc/NetworkManager/system-connections/ethusb-static.nmconnection
-if ! $force && [[ -s $conf ]] && grep -qFx "$comment" $conf; then
- # we already ran successfully in the past to set things this way, so
- # do nothing.
- exit 0
+# device that has an eth0, but we aren't using it because it is
+# broken. We could just hardcode a mac comparison with `cat
+# /sys/class/net/eth0/address` but this is cooler.
+if [[ -e /sys/class/net/eth0 ]]; then
+ bus_info=$(ethtool -i eth0 | awk '$1 == "bus-info:" { print $2 }')
+ if [[ $bus_info != usb* ]]; then
+ wiredx=2
+ fi
fi
+eth_dev=eth$(( wiredx - 1 ))
-if [[ $(dig +short @10.2.0.1 -x 10.2.0.2 2>&1 ||:) == kd.b8.nz. ]] \
- && ip n show 10.2.0.1 | grep . &>/dev/null; then
- # we are at_home=true
+nm_con=$(nmcli device show $eth_dev | \
+ awk '$1 == "GENERAL.CONNECTION:" {out=$2; for(i=3;i<=NF;i++){out=out" "$i}; print out}' ||:)
- while read -r ip_suf host mac; do
- if [[ $mac != usb ]]; then
- continue
- fi
- if [[ $host == ${HOSTNAME}c ]]; then
+if [[ ! $nm_con || $nm_con == -- ]]; then
+ nm_con="Wired connection $wiredx"
+fi
- net_info="address1=10.2.0.$ip_suf/16,10.2.0.1
-dns=8.8.8.4;8.8.8.8;"
+if ! nmcli con | grep -q "^$nm_con " &>/dev/null; then
+ # Note: we could support creation through a file or via
+ # nmcli, but right now I'm ok with just having plugged in a device once
+ # since this os was installed.
+ echo "error: no existing connection: $nm_con found in output of nmcli con"
+ exit 0
+fi
- break
- fi
- done </p/c/host-info
- if [[ ! $ip_suf ]]; then
- echo "$0: error: failed to find ${HOSTNAME}c ip suffix in /p/c/host-info"
- exit 1
- fi
-else
- ip=$(getent ahostsv4 $HOSTNAME.office.fsf.org | awk '{ print $1 }' | head -n1)
- net_info="address1=$ip/24,192.168.0.1
-dns=192.168.0.10;192.168.0.25;"
+if ! type -p dig &>/dev/null; then
+ apt-get install dig
fi
-wiredx=
+get-cur
+## end common setup / detection ##
-# device that has an eth0, but we aren't using it because it is
-# broken. We could just hardcode a mac comparison with `cat
-# /sys/class/net/eth0/address` but this is cooler.
-if [[ -e /sys/class/net/eth0 ]]; then
- bus_info=$(ethtool -i eth0 | awk '$1 == "bus-info:" { print $2 }')
- if [[ $bus_info != usb* ]]; then
- wiredx=2
- fi
+if $off; then
+ set-dynamic
+ exit 0
fi
-ethx=$(( wiredx - 1 ))
+detect-net
+get-ip
+if ! $force && [[ "$cur_method $cur_gateway $cur_dns $cur_ip" == "manual $gateway $dns $ip" ]]; then
+ echo "$0: found expected state, nothing to do."
+ exit 0
+fi
+set-nm
-uuid=$(nmcli con show "Wired connection $wiredx" 2>/dev/null | awk '$1 == "connection.uuid:" {print $2}' ||:)
-if [[ ! $uuid ]]; then
- # just a uuid that nm generated for me at some point
- uuid=0da4c614-6a3c-3ad2-8d4b-c6eebe0814c3
-fi
-# This template is the result of running, for example
+# example of down cli
+#nmcli con mod 'Wired connection 1' ipv4.method auto -ipv4.addresses 10.2.0.9/16 ipv4.gateway 0.0.0.0 -ipv4.dns "8.8.8.4,8.8.8.8"
+
+
+# FYI: the result of running, for example
# nmcli con mod "Wired connection 1" \
+ # ipv4.method manual \
# ipv4.addresses "10.2.0.23/24" \
# ipv4.gateway "10.2.0.1" \
# ipv4.dns "8.8.8.4,8.8.8.8"
-# which creates a fille named "Wired connection 1.nmconnection",
-# below. I see no reason to keep the same file name, or a bunch of
+# creates a fille named "/etc/NetworkManager/system-connections/Wired connection 1.nmconnection",
+# below.
+#
+# The nmcli man page says you should just edit files in that dir and
+# then run nmcli con reload to reread them all to load your changes, but
+# I've found that to be unreliable, the systemd journal would say
+# something like "reload happened" then nothing would change in the
+# connect that the file clearly modifies, so I switched over to using
+# the command line and just ignoring those files.
+#
+# I see no reason to keep the same file name, or a bunch of
# setting that seem irrelevant, and empty sections don't seem to do
# anything according to the man page.
+#
# [connection]
-# id=Wired connection 2
+# id=Wired connection 1
# uuid=b0fb7694-dfe6-31a1-81fa-7c17b61515a7
# type=ethernet
# interface-name=eth1
# method=auto
# [proxy]
-
-{
- cat <<EOF
-[connection]
-id=Wired connection $wiredx
-uuid=$uuid
-type=ethernet
-interface-name=eth$ethx
-
-[ipv4]
-EOF
- if $off; then
- cat <<'EOF'
-method=auto
-EOF
- else
- cat <<EOF
-$net_info
-method=manual
-EOF
- fi
-} | install -T -m0600 /dev/stdin $conf
-
-if ! $conf_only; then
- state=$(nmcli con show $uuid 2>/dev/null | awk '$1 == "GENERAL.STATE:" {print $2}' ||:)
-
- reup=false
- if [[ $state == activated ]]; then
- reup=true
- fi
-
- m nmcli con reload
-
- if $reup; then
- m nmcli con down $uuid
- m nmcli con up $uuid
- fi
-fi
-
-if ! grep -F "$comment" $conf; then
- printf "%s\n" "$comment" >>$conf
-fi
iankelling.org / git / automated-distro-installer / blobdiff