/
mk_if
executable file
·233 lines (203 loc) · 5.24 KB
/
mk_if
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#!/bin/bash
declare -A ip
ECHO=
IP_BASE_ADDR=10.1
IP6_BASE_ADDR=fd00:0:1
ROOT_NS=default
BRIDGE_NS=
NS_LIST=
ROUTES=
IF_NAME=eth
BR_NAME=br
CHAINS=
DEFAULT_CHAINS="TESTIN TESTOUT"
SCRIPT=
CMD=add
LOW=0
HIGH=10
SIDE=
show_help()
{
cat <<EOF
$0 - Usage: $0 CMD [OPTIONS]
CMD = add | del | remake
Options:
-h Show this!
-f NUM Database user name
-l NUM Database password
-n "NS NS .." List of namespaces (default high medium low default)
-b NS Specify namespace for bridge (default medium)
-r NS Specify root namespace (default default)
-R no root ns
-N NS Refresh namespace NS
-c BRIDGE Set connecting bridge name (default br)
-i NAME Set interface name (default eth)
-4 IP_ADDR First two octets of IPv4 address (default 10.1)
-6 IP6_ADDR Prefix of IPv6 address (default fd00:0:1)
-q ROUTE@IF Add route via IF num
-Q IF Add default route via IF num
-I CHAIN Add iptables chain(s) to create
-s SCRIPT Additional script to run
-e Diagnostic mode - echo commands
EOF
}
while getopts ":hf:l:n:b:r:N:eb:r:Rc:i:4:6:q:Q:I:s:" opt; do
case $opt in
h)
show_help
exit 0
;;
e)
ECHO=echo
;;
f)
LOW=$OPTARG
;;
l)
HIGH=$OPTARG
;;
n)
NS_LIST=$OPTARG
;;
b)
BRIDGE_NS=$OPTARG
[[ -z $BRIDGE_NS ]] && echo Bridge namespace cannot be blank && exit 1
;;
r)
ROOT_NS=$OPTARG
;;
R)
ROOT_NS=
;;
N)
SIDE=$OPTARG
;;
c)
BR_NAME=$OPTARG
;;
i)
IF_NAME=$OPTARG
;;
4)
IP_BASE_ADDR=$OPTARG
;;
6)
IP6_BASE_ADDR=$OPTARG
;;
q)
ROUTES="$ROUTES $OPTARG"
;;
Q)
ROUTES="$ROUTES @$OPTARG"
;;
I)
CHAINS="$CHAINS $OPTARG"
;;
s)
SCRIPT=$OPTARG
;;
?)
echo Unknown option -$OPTARG
show_help
exit 1
;;
:)
echo Missing argument -$OPTARG
show_help
exit 1
;;
esac
done
CMD=${!OPTIND}
if [[ -z $NS_LIST ]]; then
[[ -z $BRIDGE_NS ]] && BRIDGE_NS=medium
NS_LIST="high low $BRIDGE_NS $ROOT_NS"
ip=([high]=1 [low]=3 [$BRIDGE_NS]=2 [$ROOT_NS]=254)
else
if [[ -z $BRIDGE_NS ]]; then
set $NS_LIST
BRIDGE_NS=$1
else
[[ ! " $NS_LIST " =~ " $BRIDGE_NS " ]] && NS_LIST="$NS_LIST $BRIDGE_NS"
[[ -n $ROOT_NS && ! " $NS_LIST " =~ " $ROOT_NS " ]] && NS_LIST="$NS_LIST $ROOT_NS"
fi
set $NS_LIST
for IP in $(seq 1 $#); do
ip[$1]=$IP
shift
done
fi
[[ -z $CHAINS ]] && CHAINS=$DEFAULT_CHAINS
if [[ $CMD = add ]]; then
for n in $NS_LIST; do
[[ .$n = .$ROOT_NS ]] && continue
$ECHO unshare -n ip netns add $n
$ECHO ip netns exec $n ip link set up lo
done
fi
for n in $NS_LIST; do
[[ $CMD = del ]] && IPT_CMD=X || IPT_CMD=N
[[ $n = $ROOT_NS ]] && NETNS_CMD= || NETNS_CMD="ip netns exec $n"
for v in "" 6; do
for c in $CHAINS; do
$ECHO $NETNS_CMD ip${v}tables -$IPT_CMD $c
done
done
done
for n in $(seq $LOW $HIGH); do
if [[ $CMD = add || $CMD = remake ]]; then
if [[ $CMD = add ]]; then
$ECHO ip netns exec $BRIDGE_NS ip link add ${BR_NAME}${n} type bridge
$ECHO ip netns exec $BRIDGE_NS ip link set ${BR_NAME}${n} up
$ECHO ip netns exec $BRIDGE_NS ip addr add ${IP_BASE_ADDR}.${n}.${ip[medium]}/24 broadcast + dev ${BR_NAME}${n}
$ECHO ip netns exec $BRIDGE_NS ip addr add ${IP6_BASE_ADDR}:$((100 + $n))::${ip[medium]}/64 dev ${BR_NAME}${n}
NS=$NS_LIST
else
NS=$SIDE
fi
for p in $NS; do
[[ $p = $BRIDGE_NS ]] && continue
$ECHO ip netns exec $BRIDGE_NS ip link add ${IF_NAME}${n}.$p type veth peer name ${IF_NAME}${n}
$ECHO ip netns exec $BRIDGE_NS ip link set ${IF_NAME}${n}.$p master ${BR_NAME}${n}
$ECHO ip netns exec $BRIDGE_NS ip link set ${IF_NAME}${n}.$p up
$ECHO ip netns exec $BRIDGE_NS ip link set ${IF_NAME}${n} netns ${p/$ROOT_NS/1}
[[ $p = $ROOT_NS ]] && NETNS_CMD= || NETNS_CMD="ip netns exec $p"
$ECHO $NETNS_CMD ip link set ${IF_NAME}${n} up
$ECHO $NETNS_CMD ip addr add ${IP_BASE_ADDR}.${n}.${ip[$p]}/24 broadcast + dev ${IF_NAME}${n}
$ECHO $NETNS_CMD ip addr add ${IP6_BASE_ADDR}:$((100 + $n))::${ip[$p]}/64 dev ${IF_NAME}${n}
done
$ECHO ip netns exec $BRIDGE_NS ip link add ${IF_NAME}${n} type dummy
$ECHO ip netns exec $BRIDGE_NS ip link set ${IF_NAME}${n} master ${BR_NAME}${n}
$ECHO ip netns exec $BRIDGE_NS ip link set up ${IF_NAME}${n}
elif [[ $CMD = del ]]; then
for p in $NS_LIST; do
[[ $p = $BRIDGE_NS ]] && continue
$ECHO ip netns exec $BRIDGE_NS ip link del ${IF_NAME}${n}.$p
done
$ECHO ip netns exec $BRIDGE_NS ip link del ${IF_NAME}${n}
$ECHO ip netns exec $BRIDGE_NS ip link del ${BR_NAME}${n}
else
echo Unknown command $CMD
fi
done
# We have already deleted the interfaces, so the routes will have been deleted
if [[ -n $ROUTES && -n $ROOT_NS && $CMD != del ]]; then
for n in $NS_LIST; do
[[ $n = $ROOT_NS ]] && continue
[[ $n = $BRIDGE_NS ]] && IFN=$BR_NAME || IFN=$IF_NAME
for r in $ROUTES; do
set ${r/@/ }
[[ $# -eq 1 ]] && set "" $1
[[ $1 =~ : ]] && VIA=${IP6_BASE_ADDR}:$((100 + $2))::${ip[$ROOT_NS]} || VIA=${IP_BASE_ADDR}.$2.${ip[$ROOT_NS]}
$ECHO ip netns exec $n ip route add ${1:-default} via $VIA dev ${IFN}$2
[[ -z $1 ]] && $ECHO ip netns exec $n ip -6 route add default via ${IP6_BASE_ADDR}:$((100 + $2))::${ip[$ROOT_NS]} dev ${IFN}$2
done
done
fi
if [[ $CMD = del ]]; then
for n in $NS_LIST; do
[[ $n = $ROOT_NS ]] && continue
$ECHO ip netns del $n
done
fi
[[ -n $SCRIPT ]] && $SCRIPT $CMD $IP_BASE_ADDR $IP6_BASE_ADDR $IF_NAME $ECHO