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# What's `runner.py` doing?
## Common configurations
### VPP1
```
create host-interface name eth1
set int ip addr host-eth1 A1::1/120
set int state host-eth1 up
ip route add ::/0 via host-eth1 A1::2
```
### VPP2
```
create host-interface name eth1
set int ip addr host-eth1 A1::2/120
create host-interface name eth2
set int ip addr host-eth2 A2::1/120
set int state host-eth1 up
set int state host-eth2 up
ip route add ::/0 via host-eth2 A2::2
```
### VPP3
```
create host-interface name eth1
set int ip addr host-eth1 A2::2/120
create host-interface name eth2
set int ip addr host-eth2 A3::1/120
set int state host-eth1 up
set int state host-eth2 up
ip route add ::/0 via host-eth1 A2::1
```
### VPP4
```
create host-interface name eth1
set int ip addr host-eth1 A3::2/120
set int state host-eth1 up
ip route add ::/0 via host-eth1 A3::1
```
## Drop-in for GTP-U over IPv4
What's happened when you run `test tmap`:
$ ./runner.py test tmap
Setting up a virtual interface of packet generator:
#### VPP1
```
create packet-generator interface pg0
set int mac address pg0 aa:bb:cc:dd:ee:01
set int ip addr pg0 172.16.0.1/30
set ip arp pg0 172.16.0.2/30 aa:bb:cc:dd:ee:02
```
#### VPP4
```
create packet-generator interface pg0
set int mac address pg0 aa:bb:cc:dd:ee:11
set int ip addr pg0 1.0.0.2/30
set ip arp pg0 1.0.0.1 aa:bb:cc:dd:ee:22
```
SRv6 and IP routing settings:
#### VPP1
```
sr policy add bsid D1:: next D2:: next D3:: gtp4_removal sr_prefix D4::/32 v6src_prefix C1::/64
sr steer l3 172.20.0.1/32 via bsid D1::
```
#### VPP2
```
sr localsid address D2:: behavior end
ip route add D3::/128 via host-eth2 A2::2
```
#### VPP3
```
sr localsid address D3:: behavior end
ip route add D4::/32 via host-eth2 A3::2
```
#### VPP4
```
sr localsid prefix D4::/32 behavior end.m.gtp4.e v4src_position 64
ip route add 172.20.0.1/32 via pg0 1.0.0.1
```
## Packet generator and testing
Example how to build custom SRv6 packet in scapy and ipaddress pkgs
s = '\x11' * 4 + IPv4Address(u"192.168.192.10").packed + '\x11' * 8
ip6 = IPv6Address(s)
IPv6(dst=ip6, src=ip6)
## end.m.gtp4.e
First set behavior so our localsid node is called with the packet
matching C1::1 in fib table
sr localsid address C1::1 behavior end.m.gtp4.ess
show sr localsids behaviors
show sr localsid
We should send a well formated packet to C::1 destination address
that contains the correct spec as for end.m.gtp4.e with encapsulated
ipv4 src and dst address and teid with port for the conversion to
GTPU IPv4 packet
## additional commands
gdb - breakpoint
break sr_policy_rewrite.c:1620
break src/plugins/srv6-end/node.c:84
TMAP
Linux:
ip link add tmp1 type veth peer name tmp2
ip link set dev tmp1 up
ip link set dev tmp2 up
ip addr add 172.20.0.2/24 dev tmp2
create host-interface name tmp1
set int mac address host-tmp1 02:fe:98:c6:c8:7b
set interface ip address host-tmp1 172.20.0.1/24
set interface state host-tmp1 up
VPP
set sr encaps source addr C1::
sr policy add bsid D1::999:2 next D2:: next D3:: gtp4_removal sr-prefix fc34:5678::/64 local-prefix C1::/64
sr steer l3 172.21.0.0/24 via bsid d1::999:2
END
Linux
create host-interface name tmp1
set int mac address host-tmp1 02:fe:98:c6:c8:7b
set interface ip address host-tmp1 A1::1/64
set interface state host-tmp1 up
VPP
sr localsid address 1111:1111:c0a8:c00a:1122:1111:1111:1111 behavior end.m.gtp4.e
trace add af-packet-input 10
sr localsid address C3:: behavior end.m.gtp4.e
sr localsid address 2001:200:0:1ce1:3000:757f:0:2 behavior end.m.gtp4.e
|
