#define HW_HOST "10.0.0.3"Means that the IP address of the FPGA board is 10.0.0.3.
Before the PLA can be used, some certificates must be created and signed. This is done by using placonf tool from the pla directory.
First, a TTP certificate must be created with a following command, insert starting and ending date and time of the certificate in "YYYY-MM-DD HH:MM:SS" fields (currently these dates are ignored, but they must be given to the placonf). This step needs to be performed once.
./placonf ttp create "YYYY-MM-DD HH:MM:SS" "YYYY-MM-DD HH:MM:SS" > ttp.signed
Following steps must be carried out for each node that uses the PLA. Create an identity to the node.
./placonf id create > id1.tmp
Sign it with TTP certificate, again give valid starting and ending time of the certificate. Fields after "sign" denote rights and delegatable rights, value 1111 means full rights, rights fields are also currently ignored.
./placonf -C ttp.signed -K id1.tmp id sign 1111 1111 "YYYY-MM-DD HH:MM:SS" "YYYY-MM-DD HH:MM:SS" > id1.signed
Finally, verify that signing was successful.
./placonf -C id1.signed cert verifyIf the certificate was verified successfully, copy the certificate to the /etc/pla.conf :
cp id1.signed /etc/pla.conf
In the startup script, line containing 'eccrypto' determines wherever packets are signed by the PLA or not (-n flag), and wherever the hardware acceleration is used (-H flag. For example:
nice -n -20 ./eccrypto -n &
Means that the packets are not signed (-n flag for eccrypto) and:
nice -n -20 ./eccrypto &
Means that packets are signed. Note: signing packets in software is slow and this will significantly increase latency and decrease throughput. Finally:
nice -n -20 ./ecccrypto -H &
Means that hardware acceleration is used for verifying signatures
The location of the certificate file is passed to the placonf utility via -C argument like this:
./placonf -C /etc/pla.conf kernelconfig configid || stop_quit
The default location is /etc/pla.conf
The rest of the startup script contains iptables configuration. The configuration depends wherever or not the PLA is used on all network interfaces. The configuration is chosen by the hostname of the node, thus the same script can be used for several nodes (as long as the script has entries for them).
In this case, all packets are processed by the PLA. Only the following ip6tables related lines must be present:
ip6tables --table mangle -A OUTPUT -p all -j QUEUE ip6tables --table mangle -A INPUT -p all -j QUEUE ip6tables --table mangle -A FORWARD -p all -j QUEUE
This is a slightly more complicated situation. Interfaces that are NOT using the PLA must be specified. Here is an example of the configuration where PLA is not used on eth0 interface:
ip6tables --table mangle -A OUTPUT -p all -o eth0 -j ACCEPT ip6tables --table mangle -A OUTPUT -p all -j QUEUE ip6tables --table mangle -A INPUT -p all -i eth0 -j ACCEPT ip6tables --table mangle -A INPUT -p all -j QUEUE ip6tables --table mangle -A FORWARD -p all -j QUEUE
This means that packets coming and goind to/from eth0 are not touched, but all other packets are processed by the PLA. Similarly, if there is a three or more interfaces, following lines must be added for each interface that is not using the PLA:
ip6tables --table mangle -A OUTPUT -p all -o interface_name -j ACCEPT ip6tables --table mangle -A INPUT -p all -i interface_name -j ACCEPT
Execute the startup script with start argument in both PLA nodes, for example:
The startup script should output something like this:
Starting PLA... Configuring rho: 836a87e4df236eb6cbba42d694bd9c98c80b0843000000c0
If the startup scripts exit without an error and the IPv6 connection can be made between PLA nodes (ping6 can be used for testing) then the PLA is working. If signing of packets is enabled, latency should be tens of milliseconds.
Run sp script with stop argument on PLA nodes:
/sbin/lsmod |grep pla
Make sure that the /etc/pla.conf certificate is valid by running:
./placonf -C /etc/pla.conf cert verifyfrom the pla directory.
Also placonf accepts -H flag, in which case it will use hardware for certificate verification:
./placonf -H -C /etc/pla.conf cert verify
In a case of a problem, this command can be used to check wherever the problem lies in the hardware acceleration (e.g. the connection between FPGA board and host PC is broken) or somewhere else.