Add osmo-gbproxy-latest container

Change-Id: I285cb51da03b793eab994ff3c00de16097e3f992

6 files changed, 617 insertions, 0 deletions

diff --git a/osmo-gbproxy-latest/Dockerfile b/osmo-gbproxy-latest/Dockerfile
new file mode 100644
index 0000000..1e53113
--- /dev/null
+++ b/osmo-gbproxy-latest/Dockerfile
@@ -0,0 +1,63 @@
+ARG	REGISTRY=docker.io
+ARG	UPSTREAM_DISTRO=debian:stretch
+FROM	${REGISTRY}/${UPSTREAM_DISTRO}
+# Arguments used after FROM must be specified again
+ARG	OSMOCOM_REPO_MIRROR="http://download.opensuse.org"
+ARG	DISTRO
+
+MAINTAINER Harald Welte <laforge@gnumonks.org>
+
+ARG	OSMOCOM_REPO="$OSMOCOM_REPO_MIRROR/repositories/network:/osmocom:/latest/Debian_9.0/"
+
+COPY	Release.key /tmp/Release.key
+
+RUN	apt-get update && \
+	apt-get install -y --no-install-recommends \
+		gnupg
+
+RUN	case "$DISTRO" in \
+	debian*) \
+		apt-key add /tmp/Release.key && \
+		rm /tmp/Release.key && \
+		echo "deb " $OSMOCOM_REPO " ./" > /etc/apt/sources.list.d/osmocom-latest.list \
+		;; \
+	esac
+
+# we need to add this to invalidate the cache once the repository is updated.
+# unfortunately Dockerfiles don't support a conditional ARG, so we need to add both DPKG + RPM
+ADD	$OSMOCOM_REPO/Release /tmp/Release
+ADD	$OSMOCOM_REPO_MIRROR/repositories/network:/osmocom:/latest/CentOS_8/repodata/repomd.xml /tmp/repomd.xml
+RUN	case "$DISTRO" in \
+	debian*) \
+		apt-get update && \
+		apt-get install -y --no-install-recommends \
+			osmo-gbproxy \
+			telnet \
+		&& \
+		apt-get clean \
+		;; \
+	centos*) \
+		dnf install -y \
+			osmo-gbproxy \
+			telnet \
+		;; \
+	*) \
+		echo "Unsupported distribution $DISTRO" \
+		exit 23 \
+		;; \
+	esac
+
+WORKDIR	/data
+
+VOLUME	/data
+
+COPY	osmo-gbproxy.cfg 	/data/osmo-gbproxy.cfg
+
+# work-around for stupid docker not being able to properly deal with host netdevices or start
+# containers in pre-existing netns
+COPY	pipework		/usr/bin/pipework
+COPY	docker-entrypoint.sh	/docker-entrypoint.sh
+
+CMD	["/docker-entrypoint.sh"]
+
+EXPOSE	23000/udp 4246/tcp 4263/tcp
diff --git a/osmo-gbproxy-latest/Makefile b/osmo-gbproxy-latest/Makefile
new file mode 100644
index 0000000..9e5fb05
--- /dev/null
+++ b/osmo-gbproxy-latest/Makefile
@@ -0,0 +1,3 @@
+RUN_ARGS?=--rm --network sigtran --ip 172.18.0.22 -v gbproxy-vol:/data
+
+include ../make/Makefile
diff --git a/osmo-gbproxy-latest/Release.key b/osmo-gbproxy-latest/Release.key
new file mode 100644
index 0000000..a737316
--- /dev/null
+++ b/osmo-gbproxy-latest/Release.key
@@ -0,0 +1,20 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v1.4.5 (GNU/Linux)
+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+=/Tek
+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/osmo-gbproxy-latest/docker-entrypoint.sh b/osmo-gbproxy-latest/docker-entrypoint.sh
new file mode 100755
index 0000000..d166207
--- /dev/null
+++ b/osmo-gbproxy-latest/docker-entrypoint.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+set -e
+set -x
+
+if [[ -n ${WAIT_FOR_NETDEV:-} ]]; then
+	/usr/bin/pipework --wait -i ${WAIT_FOR_NETDEV}
+fi
+
+/usr/bin/osmo-gbproxy -c /data/osmo-gbproxy.cfg >/data/osmo-gbproxy.log 2>&1
diff --git a/osmo-gbproxy-latest/osmo-gbproxy.cfg b/osmo-gbproxy-latest/osmo-gbproxy.cfg
new file mode 100644
index 0000000..dec0608
--- /dev/null
+++ b/osmo-gbproxy-latest/osmo-gbproxy.cfg
@@ -0,0 +1,33 @@
+!
+! Osmocom Gb Proxy (0.9.0.404-6463) configuration saved from vty
+!!
+!
+log stderr
+ logging filter all 1
+ logging color 1
+ logging print category 1
+ logging print category-hex 0
+ logging timestamp 1
+ logging print file 1
+ logging level lns debug
+ logging level lbssgp debug
+ logging level gprs debug
+line vty
+ no login
+ bind 0.0.0.0
+!
+sgsn nsei 101
+ name main
+ns
+ bind udp local
+  listen 0.0.0.0 23000
+  accept-ipaccess
+ nse 101
+  nsvc ipa local 172.18.0.21 23000 nsvci 2342
+ timer tns-block 3
+ timer tns-block-retries 3
+ timer tns-reset 3
+ timer tns-reset-retries 3
+ timer tns-test 30
+ timer tns-alive 3
+ timer tns-alive-retries 10
diff --git a/osmo-gbproxy-latest/pipework b/osmo-gbproxy-latest/pipework
new file mode 100755
index 0000000..97ce66b
--- /dev/null
+++ b/osmo-gbproxy-latest/pipework
@@ -0,0 +1,489 @@
+#!/bin/sh
+# This code should (try to) follow Google's Shell Style Guide
+# (https://google.github.io/styleguide/shell.xml)
+set -e
+
+case "$1" in
+  --wait)
+    WAIT=1
+    ;;
+  --direct-phys)
+    DIRECT_PHYS=1
+    shift
+    ;;
+esac
+
+IFNAME=$1
+
+# default value set further down if not set here
+CONTAINER_IFNAME=
+if [ "$2" = "-i" ]; then
+  CONTAINER_IFNAME=$3
+  shift 2
+fi
+
+if [ "$2" = "-l" ]; then
+  LOCAL_IFNAME=$3
+  shift 2
+fi
+
+#inet or inet6
+FAMILY_FLAG="-4"
+if [ "$2" = "-a" ]; then
+  FAMILY_FLAG="-$3"
+  shift 2
+fi
+
+GUESTNAME=$2
+IPADDR=$3
+MACADDR=$4
+
+case "$MACADDR" in
+  *@*)
+    VLAN="${MACADDR#*@}"
+    VLAN="${VLAN%%@*}"
+    MACADDR="${MACADDR%%@*}"
+    ;;
+  *)
+    VLAN=
+    ;;
+esac
+
+# did they ask to generate a custom MACADDR?
+# generate the unique string
+case "$MACADDR" in
+  U:*)
+    macunique="${MACADDR#*:}"
+    # now generate a 48-bit hash string from $macunique
+    MACADDR=$(echo $macunique|md5sum|sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\).*$/02:\1:\2:\3:\4:\5/')
+   ;;
+esac
+
+
+[ "$IPADDR" ] || [ "$WAIT" ] || {
+  echo "Syntax:"
+  echo "pipework <hostinterface> [-i containerinterface] [-l localinterfacename] [-a addressfamily] <guest> <ipaddr>/<subnet>[@default_gateway] [macaddr][@vlan]"
+  echo "pipework <hostinterface> [-i containerinterface] [-l localinterfacename] <guest> dhcp [macaddr][@vlan]"
+  echo "pipework mac:<hostinterface_macaddress> [-i containerinterface] [-l localinterfacename] [-a addressfamily] <guest> <ipaddr>/<subnet>[@default_gateway] [macaddr][@vlan]"
+  echo "pipework mac:<hostinterface_macaddress> [-i containerinterface] [-l localinterfacename] <guest> dhcp [macaddr][@vlan]"
+  echo "pipework route <guest> <route_command>"
+  echo "pipework rule <guest> <rule_command>"
+  echo "pipework tc <guest> <tc_command>"
+  echo "pipework --wait [-i containerinterface]"
+  exit 1
+}
+
+# Succeed if the given utility is installed. Fail otherwise.
+# For explanations about `which` vs `type` vs `command`, see:
+# http://stackoverflow.com/questions/592620/check-if-a-program-exists-from-a-bash-script/677212#677212
+# (Thanks to @chenhanxiao for pointing this out!)
+installed () {
+  command -v "$1" >/dev/null 2>&1
+}
+
+# Google Styleguide says error messages should go to standard error.
+warn () {
+  echo "$@" >&2
+}
+die () {
+  status="$1"
+  shift
+  warn "$@"
+  exit "$status"
+}
+
+if echo $IFNAME | grep -q '^mac:'; then
+  mac_address=$(echo $IFNAME | cut -c5-)
+  ifmatch=
+  for iftest in /sys/class/net/*; do
+    if [ -f $iftest/address ] && [ "$mac_address" = "$(cat $iftest/address)" ]; then
+      ifmatch="$(basename $iftest)"
+      break
+    fi
+  done
+
+  if [ -z "$ifmatch" ]; then
+    die 1 "Mac address $mac_address specified for interface but no host interface matched."
+  else
+    IFNAME=$ifmatch
+  fi
+fi
+
+# First step: determine type of first argument (bridge, physical interface...),
+# Unless "--wait" is set (then skip the whole section)
+if [ -z "$WAIT" ]; then
+  if [ -d "/sys/class/net/$IFNAME" ]
+  then
+    if [ -d "/sys/class/net/$IFNAME/bridge" ]; then
+      IFTYPE=bridge
+      BRTYPE=linux
+    elif installed ovs-vsctl && ovs-vsctl list-br|grep -q "^${IFNAME}$"; then
+      IFTYPE=bridge
+      BRTYPE=openvswitch
+    elif [ "$(cat "/sys/class/net/$IFNAME/type")" -eq 32 ]; then # InfiniBand IPoIB interface type 32
+      IFTYPE=ipoib
+      # The IPoIB kernel module is fussy, set device name to ib0 if not overridden
+      CONTAINER_IFNAME=${CONTAINER_IFNAME:-ib0}
+      PKEY=$VLAN
+    else IFTYPE=phys
+    fi
+  else
+    case "$IFNAME" in
+      br*)
+        IFTYPE=bridge
+        BRTYPE=linux
+        ;;
+      ovs*)
+        if ! installed ovs-vsctl; then
+          die 1 "Need OVS installed on the system to create an ovs bridge"
+        fi
+        IFTYPE=bridge
+        BRTYPE=openvswitch
+        ;;
+      route*)
+        IFTYPE=route
+        ;;
+      rule*)
+        IFTYPE=rule
+        ;;
+      tc*)
+        IFTYPE=tc
+        ;;
+      dummy*)
+        IFTYPE=dummy
+        ;;
+      *) die 1 "I do not know how to setup interface $IFNAME." ;;
+    esac
+  fi
+fi
+
+# Set the default container interface name to eth1 if not already set
+CONTAINER_IFNAME=${CONTAINER_IFNAME:-eth1}
+
+[ "$WAIT" ] && {
+  while true; do
+    # This first method works even without `ip` or `ifconfig` installed,
+    # but doesn't work on older kernels (e.g. CentOS 6.X). See #128.
+    grep -q '^1$' "/sys/class/net/$CONTAINER_IFNAME/carrier" && break
+    # This method hopefully works on those older kernels.
+    ip link ls dev "$CONTAINER_IFNAME" && break
+    sleep 1
+  done > /dev/null 2>&1
+  exit 0
+}
+
+[ "$IFTYPE" = bridge ] && [ "$BRTYPE" = linux ] && [ "$VLAN" ] && {
+  die 1 "VLAN configuration currently unsupported for Linux bridge."
+}
+
+[ "$IFTYPE" = ipoib ] && [ "$MACADDR" ] && {
+  die 1 "MACADDR configuration unsupported for IPoIB interfaces."
+}
+
+# Second step: find the guest (for now, we only support LXC containers)
+while read _ mnt fstype options _; do
+  [ "$fstype" != "cgroup" ] && continue
+  echo "$options" | grep -qw devices || continue
+  CGROUPMNT=$mnt
+done < /proc/mounts
+
+[ "$CGROUPMNT" ] || {
+    die 1 "Could not locate cgroup mount point."
+}
+
+# Try to find a cgroup matching exactly the provided name.
+M=$(find "$CGROUPMNT" -name "$GUESTNAME")
+N=$(echo "$M" | wc -l)
+if [ -z "$M" ] ; then
+    N=0
+fi
+case "$N" in
+  0)
+    # If we didn't find anything, try to lookup the container with Docker.
+    if installed docker; then
+      RETRIES=3
+      while [ "$RETRIES" -gt 0 ]; do
+        DOCKERPID=$(docker inspect --format='{{ .State.Pid }}' "$GUESTNAME")
+        DOCKERCID=$(docker inspect --format='{{ .ID }}' "$GUESTNAME")
+        DOCKERCNAME=$(docker inspect --format='{{ .Name }}' "$GUESTNAME")
+
+        [ "$DOCKERPID" != 0 ] && break
+        sleep 1
+        RETRIES=$((RETRIES - 1))
+      done
+
+      [ "$DOCKERPID" = 0 ] && {
+        die 1 "Docker inspect returned invalid PID 0"
+      }
+
+      [ "$DOCKERPID" = "<no value>" ] && {
+        die 1 "Container $GUESTNAME not found, and unknown to Docker."
+      }
+    else
+      die 1 "Container $GUESTNAME not found, and Docker not installed."
+    fi
+    ;;
+  1) true ;;
+  2)  # LXC >=3.1.0 returns two entries from the cgroups mount instead of one.
+      echo "$M" | grep -q "lxc\.monitor" || die 1 "Found more than one container matching $GUESTNAME."
+      ;;
+  *) die 1 "Found more than one container matching $GUESTNAME." ;;
+esac
+
+# only check IPADDR if we are not in a route mode
+[ "$IFTYPE" != route ] && [ "$IFTYPE" != rule ] && [ "$IFTYPE" != tc ] && {
+  case "$IPADDR" in
+	  # Let's check first if the user asked for DHCP allocation.
+	  dhcp|dhcp:*)
+	    # Use Docker-specific strategy to run the DHCP client
+	    # from the busybox image, in the network namespace of
+	    # the container.
+	    if ! [ "$DOCKERPID" ]; then
+	      warn "You asked for a Docker-specific DHCP method."
+	      warn "However, $GUESTNAME doesn't seem to be a Docker container."
+	      warn "Try to replace 'dhcp' with another option?"
+	      die 1 "Aborting."
+	    fi
+	    DHCP_CLIENT=${IPADDR%%:*}
+	    ;;
+	  udhcpc|udhcpc:*|udhcpc-f|udhcpc-f:*|dhcpcd|dhcpcd:*|dhclient|dhclient:*|dhclient-f|dhclient-f:*)
+	    DHCP_CLIENT=${IPADDR%%:*}
+	    # did they ask for the client to remain?
+	    DHCP_FOREGROUND=
+	    [ "${DHCP_CLIENT%-f}" != "${DHCP_CLIENT}" ] && {
+	      DHCP_FOREGROUND=true
+	    }
+	    DHCP_CLIENT=${DHCP_CLIENT%-f}
+	    if ! installed "$DHCP_CLIENT"; then
+	      die 1 "You asked for DHCP client $DHCP_CLIENT, but I can't find it."
+	    fi
+	    ;;
+	  # Alright, no DHCP? Then let's see if we have a subnet *and* gateway.
+	  */*@*)
+	    GATEWAY="${IPADDR#*@}" GATEWAY="${GATEWAY%%@*}"
+	    IPADDR="${IPADDR%%@*}"
+	    ;;
+	  # No gateway? We need at least a subnet, anyway!
+	  */*) : ;;
+	  # ... No? Then stop right here.
+	  *)
+	    warn "The IP address should include a netmask."
+	    die 1 "Maybe you meant $IPADDR/24 ?"
+	    ;;
+  esac
+}
+
+# If a DHCP method was specified, extract the DHCP options.
+if [ "$DHCP_CLIENT" ]; then
+  case "$IPADDR" in
+    *:*) DHCP_OPTIONS="${IPADDR#*:}" ;;
+  esac
+fi
+
+if [ "$DOCKERPID" ]; then
+  NSPID=$DOCKERPID
+else
+  NSPID=$(head -n 1 "$(find "$CGROUPMNT" -name "$GUESTNAME" | head -n 1)/tasks")
+  [ "$NSPID" ] || {
+    # it is an alternative way to get the pid
+    NSPID=$(lxc-info -n  "$GUESTNAME" | grep PID | grep -Eo '[0-9]+')
+    [ "$NSPID" ] || {
+      die 1 "Could not find a process inside container $GUESTNAME."
+    }
+  }
+fi
+
+# Check if an incompatible VLAN device already exists
+[ "$IFTYPE" = phys ] && [ "$VLAN" ] && [ -d "/sys/class/net/$IFNAME.VLAN" ] && {
+  ip -d link show "$IFNAME.$VLAN" | grep -q "vlan.*id $VLAN" || {
+    die 1 "$IFNAME.VLAN already exists but is not a VLAN device for tag $VLAN"
+  }
+}
+
+[ ! -d /var/run/netns ] && mkdir -p /var/run/netns
+rm -f "/var/run/netns/$NSPID"
+ln -s "/proc/$NSPID/ns/net" "/var/run/netns/$NSPID"
+
+# Check if we need to create a bridge.
+[ "$IFTYPE" = bridge ] && [ ! -d "/sys/class/net/$IFNAME" ] && {
+  [ "$BRTYPE" = linux ] && {
+    (ip link add dev "$IFNAME" type bridge > /dev/null 2>&1) || (brctl addbr "$IFNAME")
+    ip link set "$IFNAME" up
+  }
+  [ "$BRTYPE" = openvswitch ] && {
+    ovs-vsctl add-br "$IFNAME"
+  }
+}
+
+[ "$IFTYPE" != "route" ] && [ "$IFTYPE" != "dummy" ] && [ "$IFTYPE" != "rule" ] && [ "$IFTYPE" != "tc" ] && MTU=$(ip link show "$IFNAME" | awk '{print $5}')
+
+# If it's a bridge, we need to create a veth pair
+[ "$IFTYPE" = bridge ] && {
+  if [ -z "$LOCAL_IFNAME" ]; then
+    LOCAL_IFNAME="v${CONTAINER_IFNAME}pl${NSPID}"
+  fi
+  GUEST_IFNAME="v${CONTAINER_IFNAME}pg${NSPID}"
+  # Does the link already exist?
+  if ip link show "$LOCAL_IFNAME" >/dev/null 2>&1; then
+    # link exists, is it in use?
+    if ip link show "$LOCAL_IFNAME" up | grep -q "UP"; then
+      echo "Link $LOCAL_IFNAME exists and is up"
+      exit 1
+    fi
+    # delete the link so we can re-add it afterwards
+    ip link del "$LOCAL_IFNAME"
+  fi
+  ip link add name "$LOCAL_IFNAME" mtu "$MTU" type veth peer name "$GUEST_IFNAME" mtu "$MTU"
+  case "$BRTYPE" in
+    linux)
+      (ip link set "$LOCAL_IFNAME" master "$IFNAME" > /dev/null 2>&1) || (brctl addif "$IFNAME" "$LOCAL_IFNAME")
+      ;;
+    openvswitch)
+      if ! ovs-vsctl list-ports "$IFNAME" | grep -q "^${LOCAL_IFNAME}$"; then
+        ovs-vsctl add-port "$IFNAME" "$LOCAL_IFNAME" ${VLAN:+tag="$VLAN"} \
+            -- set Interface "$LOCAL_IFNAME" \
+                external-ids:pipework.interface="$LOCAL_IFNAME" \
+                external-ids:pipework.bridge="$IFNAME" \
+                ${DOCKERCID:+external-ids:pipework.containerid="$DOCKERCID"} \
+                ${DOCKERCNAME:+external-ids:pipework.containername="$DOCKERCNAME"} \
+                ${NSPID:+external-ids:pipework.nspid="$NSPID"} \
+                ${VLAN:+external-ids:pipework.vlan="$VLAN"}
+      fi
+      ;;
+  esac
+  ip link set "$LOCAL_IFNAME" up
+}
+
+# If it's a physical interface, create a macvlan subinterface
+[ "$IFTYPE" = phys ] && {
+  [ "$VLAN" ] && {
+    [ ! -d "/sys/class/net/${IFNAME}.${VLAN}" ] && {
+      ip link add link "$IFNAME" name "$IFNAME.$VLAN" mtu "$MTU" type vlan id "$VLAN"
+    }
+    ip link set "$IFNAME" up
+    IFNAME=$IFNAME.$VLAN
+  }
+
+  if [ ! -z "$DIRECT_PHYS" ]; then
+    GUEST_IFNAME=$IFNAME
+  else
+    GUEST_IFNAME=ph$NSPID$CONTAINER_IFNAME
+    ip link add link "$IFNAME" dev "$GUEST_IFNAME" mtu "$MTU" type macvlan mode bridge
+  fi
+
+  ip link set "$IFNAME" up
+}
+
+# If it's an IPoIB interface, create a virtual IPoIB interface (the IPoIB
+# equivalent of a macvlan device)
+#
+# Note: no macvlan subinterface nor Ethernet bridge can be created on top of an
+# IPoIB interface. InfiniBand is not Ethernet. IPoIB is an IP layer on top of
+# InfiniBand, without an intermediate Ethernet layer.
+[ "$IFTYPE" = ipoib ] && {
+  GUEST_IFNAME="${IFNAME}.${NSPID}"
+
+  # If a partition key is provided, use it
+  [ "$PKEY" ] && {
+    GUEST_IFNAME="${IFNAME}.${PKEY}.${NSPID}"
+    PKEY="pkey 0x$PKEY"
+  }
+
+  ip link add link "$IFNAME" name "$GUEST_IFNAME" type ipoib $PKEY
+  ip link set "$IFNAME" up
+}
+
+# If its a dummy interface, create a dummy interface.
+[ "$IFTYPE" = dummy ] && {
+  GUEST_IFNAME=du$NSPID$CONTAINER_IFNAME
+  ip link add dev "$GUEST_IFNAME" type dummy
+}
+
+# If the `route` command was specified ...
+if [ "$IFTYPE" = route ]; then
+  # ... discard the first two arguments and pass the rest to the route command.
+  shift 2
+  ip netns exec "$NSPID" ip route "$@"
+elif [ "$IFTYPE" = rule ] ; then
+  shift 2
+  ip netns exec "$NSPID" ip rule "$@"
+elif [ "$IFTYPE" = tc ] ; then
+  shift 2
+  ip netns exec "$NSPID" tc "$@"
+else
+  # Otherwise, run normally.
+  ip link set "$GUEST_IFNAME" netns "$NSPID"
+  ip netns exec "$NSPID" ip link set "$GUEST_IFNAME" name "$CONTAINER_IFNAME"
+  [ "$MACADDR" ] && ip netns exec "$NSPID" ip link set dev "$CONTAINER_IFNAME" address "$MACADDR"
+
+	# When using any of the DHCP methods, we start a DHCP client in the
+	# network namespace of the container. With the 'dhcp' method, the
+	# client used is taken from the Docker busybox image (therefore
+	# requiring no specific client installed on the host). Other methods
+	# use a locally installed client.
+	case "$DHCP_CLIENT" in
+	  dhcp)
+	    docker run -d --net container:$GUESTNAME --cap-add NET_ADMIN \
+	           busybox udhcpc -i "$CONTAINER_IFNAME" -x "hostname:$GUESTNAME" \
+	           $DHCP_OPTIONS \
+	           >/dev/null
+	    ;;
+	  udhcpc)
+	    DHCP_Q="-q"
+	    [ "$DHCP_FOREGROUND" ] && {
+	      DHCP_OPTIONS="$DHCP_OPTIONS -f"
+	    }
+	    ip netns exec "$NSPID" "$DHCP_CLIENT" -qi "$CONTAINER_IFNAME" \
+	                                          -x "hostname:$GUESTNAME" \
+	                                          -p "/var/run/udhcpc.$GUESTNAME.pid" \
+	                                          $DHCP_OPTIONS
+	    [ ! "$DHCP_FOREGROUND" ] && {
+	      rm "/var/run/udhcpc.$GUESTNAME.pid"
+	    }
+	    ;;
+	  dhclient)
+	    ip netns exec "$NSPID" "$DHCP_CLIENT" "$CONTAINER_IFNAME" \
+	                                          -pf "/var/run/dhclient.$GUESTNAME.pid" \
+	                                          -lf "/etc/dhclient/dhclient.$GUESTNAME.leases" \
+	                                          $DHCP_OPTIONS
+	    # kill dhclient after get ip address to prevent device be used after container close
+	    [ ! "$DHCP_FOREGROUND" ] && {
+	      kill "$(cat "/var/run/dhclient.$GUESTNAME.pid")"
+	      rm "/var/run/dhclient.$GUESTNAME.pid"
+	    }
+	    ;;
+	  dhcpcd)
+	    ip netns exec "$NSPID" "$DHCP_CLIENT" -q "$CONTAINER_IFNAME" -h "$GUESTNAME"
+	    ;;
+	  "")
+	    if installed ipcalc; then
+	      eval $(ipcalc -b $IPADDR)
+	      ip netns exec "$NSPID" ip "$FAMILY_FLAG" addr add "$IPADDR" brd "$BROADCAST" dev "$CONTAINER_IFNAME"
+	    else
+	      ip netns exec "$NSPID" ip "$FAMILY_FLAG" addr add "$IPADDR" dev "$CONTAINER_IFNAME"
+	    fi
+
+	    [ "$GATEWAY" ] && {
+	      ip netns exec "$NSPID" ip "$FAMILY_FLAG" route delete default >/dev/null 2>&1 && true
+	    }
+	    ip netns exec "$NSPID" ip "$FAMILY_FLAG" link set "$CONTAINER_IFNAME" up
+	    [ "$GATEWAY" ] && {
+	      ip netns exec "$NSPID" ip "$FAMILY_FLAG" route get "$GATEWAY" >/dev/null 2>&1 || \
+	      ip netns exec "$NSPID" ip "$FAMILY_FLAG" route add "$GATEWAY/32" dev "$CONTAINER_IFNAME"
+	      ip netns exec "$NSPID" ip "$FAMILY_FLAG" route replace default via "$GATEWAY" dev "$CONTAINER_IFNAME"
+	    }
+	    ;;
+	esac
+
+  # Give our ARP neighbors a nudge about the new interface
+  if installed arping; then
+    IPADDR=$(echo "$IPADDR" | cut -d/ -f1)
+    ip netns exec "$NSPID" arping -c 1 -A -I "$CONTAINER_IFNAME" "$IPADDR" > /dev/null 2>&1 || true
+  else
+    echo "Warning: arping not found; interface may not be immediately reachable"
+  fi
+fi
+# Remove NSPID to avoid `ip netns` catch it.
+rm -f "/var/run/netns/$NSPID"
+
+# vim: set tabstop=2 shiftwidth=2 softtabstop=2 expandtab :