# DEL_NAMESPACES(ns [, ns ... ])
#
# Delete namespaces from the running OS
m4_define([DEL_NAMESPACES],
   [m4_foreach([ns], [$@],
               [ip netns del ns
])
   ]
)

# ADD_NAMESPACES(ns [, ns ... ])
#
# Add new namespaces, if ns exists, the old one
# will be remove before new ones are installed.
m4_define([ADD_NAMESPACES],
   [m4_foreach([ns], [$@],
               [DEL_NAMESPACES(ns)
                AT_CHECK([ip netns add ns || return 77])
                on_exit 'DEL_NAMESPACES(ns)'
                ip netns exec ns sysctl -w net.netfilter.nf_conntrack_helper=0
               ])
   ]
)

# NS_EXEC([namespace], [command])
#
# Execute 'command' in 'namespace'
m4_define([NS_EXEC],
    [ip netns exec $1 sh << NS_EXEC_HEREDOC
$2
NS_EXEC_HEREDOC])

# NS_CHECK_EXEC([namespace], [command], other_params...)
#
# Wrapper for AT_CHECK that executes 'command' inside 'namespace'.
# 'other_params' as passed as they are to AT_CHECK.
m4_define([NS_CHECK_EXEC],
    [ AT_CHECK([NS_EXEC([$1], [$2])], m4_shift(m4_shift($@))) ]
)

# ADD_BR([name], [vsctl-args])
#
# Expands into the proper ovs-vsctl commands to create a bridge with the
# appropriate type, and allows additional arguments to be passed.
m4_define([ADD_BR], [ovs-vsctl _ADD_BR([$1]) -- $2])

# ADD_INT([port], [namespace], [ovs-br], [ip_addr])
#
# Add an internal port to 'ovs-br', then shift it into 'namespace' and
# configure it with 'ip_addr' (specified in CIDR notation).
m4_define([ADD_INT],
    [ AT_CHECK([ovs-vsctl add-port $3 $1 -- set int $1 type=internal])
      AT_CHECK([ip link set $1 netns $2])
      NS_CHECK_EXEC([$2], [ip addr add $4 dev $1])
      NS_CHECK_EXEC([$2], [ip link set dev $1 up])
    ]
)

# ADD_VETH([port], [namespace], [ovs-br], [ip_addr] [mac_addr], [gateway],
#          [ip_addr_flags])
#
# Add a pair of veth ports. 'port' will be added to name space 'namespace',
# and "ovs-'port'" will be added to ovs bridge 'ovs-br'.
#
# The 'port' in 'namespace' will be brought up with static IP address
# with 'ip_addr' in CIDR notation.
#
# Optionally, one can specify the 'mac_addr' for 'port' and the default
# 'gateway'.
#
# The existing 'port' or 'ovs-port' will be removed before new ones are added.
#
m4_define([ADD_VETH],
    [ AT_CHECK([ip link add $1 type veth peer name ovs-$1 || return 77])
      CONFIGURE_VETH_OFFLOADS([$1])
      AT_CHECK([ip link set $1 netns $2])
      AT_CHECK([ip link set dev ovs-$1 up])
      AT_CHECK([ovs-vsctl add-port $3 ovs-$1 -- \
                set interface ovs-$1 external-ids:iface-id="$1"])
      NS_CHECK_EXEC([$2], [ip addr add $4 dev $1 $7])
      NS_CHECK_EXEC([$2], [ip link set dev $1 up])
      if test -n "$5"; then
        NS_CHECK_EXEC([$2], [ip link set dev $1 address $5])
      fi
      if test -n "$6"; then
        NS_CHECK_EXEC([$2], [ip route add default via $6])
      fi
      on_exit 'ip link del ovs-$1'
    ]
)

# ADD_VETH_BOND([ports], [namespace], [ovs-br], [bond], [mode], [ip_addr])
#
# Add a set of veth port pairs. Ports named in the list 'ports' will be added
# to 'namespace', and the corresponding port names, prefixed by 'ovs-' will
# be included in an OVS bond 'bond' which is added to bridge 'ovs-br'.
#
# The 'bond' in 'namespace' will be brought up with static IP address
# with 'ip_addr' in CIDR notation.
#
m4_define([ADD_VETH_BOND],
    [
      BONDPORTS=""
      for port in $1; do
          AT_CHECK([ip link add $port type veth peer name ovs-$port])
          CONFIGURE_VETH_OFFLOADS([$port])
          AT_CHECK([ip link set $port netns $2])
          AT_CHECK([ip link set dev ovs-$port up])
          BONDPORTS="$BONDPORTS ovs-$port"
          on_exit 'ip link del ovs-$port'
      done
      NS_CHECK_EXEC([$2], [ip link add name $4 type bond])
      case "$(echo $5 | sed 's/.*lacp=//' | sed 's/ .*//')" in
      active|passive)
          NS_CHECK_EXEC([$2], [sh -c "echo 802.3ad > /sys/class/net/$4/bonding/mode"])
          NS_CHECK_EXEC([$2], [sh -c "echo 100     > /sys/class/net/$4/bonding/miimon"])
      ;;
      esac
      for port in $1; do
          NS_CHECK_EXEC([$2], [ip link set dev $port master $4])
      done
      NS_CHECK_EXEC([$2], [ip addr add $6 dev $4])
      NS_CHECK_EXEC([$2], [ip link set dev $4 up])
      AT_CHECK([ovs-vsctl add-bond $3 ovs-$4 $BONDPORTS $5])
      on_exit 'ip link del ovs-$4'
    ]
)

# ADD_VLAN([port], [namespace], [vlan-id], [ip-addr])
#
# Add a VLAN device named 'port' within 'namespace'. It will be configured
# with the ID 'vlan-id' and the address 'ip-addr'.
m4_define([ADD_VLAN],
    [ NS_CHECK_EXEC([$2], [ip link add link $1 name $1.$3 type vlan proto 802.1q id $3])
      NS_CHECK_EXEC([$2], [ip link set dev $1.$3 up])
      NS_CHECK_EXEC([$2], [ip addr add dev $1.$3 $4])
    ]
)

# ADD_SVLAN([port], [namespace], [vlan-id], [ip-addr])
#
# Add a SVLAN device named 'port' within 'namespace'. It will be configured
# with the ID 'vlan-id' and the address 'ip-addr'.
m4_define([ADD_SVLAN],
    [ NS_CHECK_EXEC([$2], [ip link add link $1 name $1.$3 type vlan proto 802.1ad id $3])
      NS_CHECK_EXEC([$2], [ip link set dev $1.$3 up])
      NS_CHECK_EXEC([$2], [ip addr add dev $1.$3 $4])
      NS_CHECK_EXEC([$2], [ip link set $1.$3 mtu 1496])
    ]
)

# ADD_CVLAN([port], [namespace], [vlan-id], [ip-addr])
#
# Similar to ADD_VLAN(), but sets MTU. Lower MTU here instead of increase MTU
# on bridge/SVLAN because older kernels didn't work.
#
m4_define([ADD_CVLAN],
    [ ADD_VLAN([$1], [$2], [$3], [$4])
      NS_CHECK_EXEC([$2], [ip link set $1.$3 mtu 1492])
    ]
)

# ADD_OVS_TUNNEL([type], [bridge], [port], [remote-addr], [overlay-addr],
#                [tunnel-args])
#
# Add an ovs-based tunnel device in the root namespace, with name 'port' and
# type 'type'. The tunnel device will be configured as point-to-point with the
# 'remote-addr' as the underlay address of the remote tunnel endpoint.
#
# 'port will be configured with the address 'overlay-addr'.
#
m4_define([ADD_OVS_TUNNEL],
   [AT_CHECK([ovs-vsctl add-port $2 $3 -- \
              set int $3 type=$1 options:remote_ip=$4 $6])
    AT_CHECK([ip addr add dev $2 $5])
    AT_CHECK([ip link set dev $2 up])
    AT_CHECK([ip link set dev $2 mtu 1450])
    on_exit 'ip addr del dev $2 $5'
   ]
)

# ADD_OVS_TUNNEL6([type], [bridge], [port], [remote-addr], [overlay-addr],
#                 [tunnel-args])
#
# Same as ADD_OVS_TUNNEL, but drops MTU enough for the IPv6 underlay.
#
m4_define([ADD_OVS_TUNNEL6],
   [ADD_OVS_TUNNEL([$1], [$2], [$3], [$4], [$5], [$6])
    AT_CHECK([ip link set dev $2 mtu 1430])
   ]
)

# ADD_NATIVE_TUNNEL([type], [port], [namespace], [remote-addr], [overlay-addr],
#                   [type-args], [link-args])
#
# Add a native tunnel device within 'namespace', with name 'port' and type
# 'type'. The tunnel device will be configured as point-to-point with the
# 'remote-addr' as the underlay address of the remote tunnel endpoint (as
# viewed from the perspective of that namespace).
#
# 'port' will be configured with the address 'overlay-addr'. 'type-args' is
# made available so that additional arguments can be passed to "ip link add"
# for configuring specific link type's arguments, for instance to configure
# the vxlan destination port. 'link-args' is made for arguments passed to
# "ip link set", for instance to configure MAC address.
#
m4_define([ADD_NATIVE_TUNNEL],
   [NS_CHECK_EXEC([$3], [ip link add dev $2 type $1 remote $4 $6])
    NS_CHECK_EXEC([$3], [ip addr add dev $2 $5])
    NS_CHECK_EXEC([$3], [ip link set dev $2 mtu 1450 $7 up])
   ]
)

# ADD_NATIVE_TUNNEL6([type], [port], [namespace], [remote-addr], [overlay-addr],
#                   [type-args], [link-args])
#
# Same as ADD_NATIVE_TUNNEL, but drops MTU enough for the IPv6 underlay.
#
m4_define([ADD_NATIVE_TUNNEL6],
   [ADD_NATIVE_TUNNEL([$1], [$2], [$3], [$4], [$5], [$6], [$7])
    NS_CHECK_EXEC([$3], [ip link set dev $2 mtu 1430])
   ]
)

# FORMAT_PING([])
#
# Strip variant pieces from ping output so the output can be reliably compared.
#
m4_define([FORMAT_PING], [grep "transmitted" | sed 's/time.*ms$/time 0ms/'])

# STRIP_MONITOR_CSUM([])
#
# Strip the csum value from ovs-ofctl monitor.
#
m4_define([STRIP_MONITOR_CSUM], [grep "csum:" | sed 's/csum:.*/csum: <skip>/'])

# FORMAT_CT([ip-addr])
#
# Strip content from the piped input which would differ from test to test
# and limit the output to the rows containing 'ip-addr'.
#
m4_define([FORMAT_CT],
    [[grep "dst=$1" | sed -e 's/port=[0-9]*/port=<cleared>/g' -e 's/id=[0-9]*/id=<cleared>/g' -e 's/state=[0-9_A-Z]*/state=<cleared>/g' | sort | uniq]])

# NETNS_DAEMONIZE([namespace], [command], [pidfile])
#
# Run 'command' as a background process within 'namespace' and record its pid
# to 'pidfile' to allow cleanup on exit.
#
m4_define([NETNS_DAEMONIZE],
   [ip netns exec $1 $2 & echo $! > $3
     echo "kill \`cat $3\`" >> cleanup
   ]
)

# OVS_CHECK_FIREWALL()
#
# Check if firewalld is active, skip the test if it is on.
# The following command currently only supports RHEL and CentOS.
m4_define([OVS_CHECK_FIREWALL],
    [AT_SKIP_IF([systemctl status firewalld 2>&1 | grep running > /dev/null])])

# OVS_START_L7([namespace], [protocol])
#
# Start a server serving 'protocol' within 'namespace'. The server will exit
# when the test finishes.
#
m4_define([OVS_START_L7],
   [PIDFILE=$(mktemp $2XXX.pid)
    NETNS_DAEMONIZE([$1], [[$PYTHON $srcdir/test-l7.py $2]], [$PIDFILE])

    dnl netstat doesn't print http over IPv6 as "http6"; drop the number.
    PROTO=$(echo $2 | sed -e 's/\([[a-zA-Z]]*\).*/\1/')
    OVS_WAIT_UNTIL([NS_EXEC([$1], [netstat -l | grep $PROTO])])
   ]
)

# OVS_CHECK_VXLAN()
#
# Do basic check for vxlan functionality, skip the test if it's not there.
m4_define([OVS_CHECK_VXLAN],
    [AT_SKIP_IF([! ip link add foo type vxlan help 2>&1 | grep dstport >/dev/null])
     OVS_CHECK_FIREWALL()])

# OVS_CHECK_VXLAN_UDP6ZEROCSUM()
m4_define([OVS_CHECK_VXLAN_UDP6ZEROCSUM],
    [AT_SKIP_IF([! ip link add foo type vxlan help 2>&1 | grep udp6zerocsum >/dev/null])
     OVS_CHECK_FIREWALL()])

# OVS_CHECK_VXLAN_GPE()
m4_define([OVS_CHECK_VXLAN_GPE],
    [OVS_CHECK_VXLAN()
     AT_SKIP_IF([! ip link add foo type vxlan help 2>&1 | grep gpe >/dev/null])])

# OVS_CHECK_GRE()
m4_define([OVS_CHECK_GRE],
    [AT_SKIP_IF([! ip link add foo type gretap help 2>&1 | grep gretap >/dev/null])
     OVS_CHECK_FIREWALL()])

# OVS_CHECK_ERSPAN()
m4_define([OVS_CHECK_ERSPAN],
    [AT_SKIP_IF([! ip link add foo type erspan help 2>&1 | grep erspan >/dev/null])
     OVS_CHECK_FIREWALL()])

# OVS_CHECK_GRE_L3()
m4_define([OVS_CHECK_GRE_L3],
    [AT_SKIP_IF([! ip link add foo type gre help 2>&1 | grep "gre " >/dev/null])
     OVS_CHECK_FIREWALL()])

# OVS_CHECK_GENEVE()
m4_define([OVS_CHECK_GENEVE],
    [AT_SKIP_IF([! ip link add foo type geneve help 2>&1 | grep geneve >/dev/null])
     OVS_CHECK_FIREWALL()])

# OVS_CHECK_GENEVE_UDP6ZEROCSUM()
m4_define([OVS_CHECK_GENEVE_UDP6ZEROCSUM],
    [AT_SKIP_IF([! ip link add foo type geneve help 2>&1 | grep udp6zerocsum >/dev/null])
     OVS_CHECK_FIREWALL()])

# OVS_CHECK_8021AD()
m4_define([OVS_CHECK_8021AD],
    [AT_SKIP_IF([! grep -q "VLAN header stack length probed as" ovs-vswitchd.log])
     AT_SKIP_IF([[test `sed -n 's/.*VLAN header stack length probed as \([0-9]\+\).*/\1/p' ovs-vswitchd.log` -lt 2]])])

# OVS_CHECK_IPROUTE_ENCAP()
m4_define([OVS_CHECK_IPROUTE_ENCAP],
    [AT_SKIP_IF([! ip route help 2>&1 |grep encap >/dev/null])])

# OVS_CHECK_CT_CLEAR()
m4_define([OVS_CHECK_CT_CLEAR],
    [AT_SKIP_IF([! grep -q "Datapath supports ct_clear action" ovs-vswitchd.log])])