Fork of pingu

Pingu is a daemon that takes care of policy routing and fail-over in multi ISP setups.

This fork is born to overcome some stupid features of the router installed by the major Italian ISP (aka TIM==Telecom Italia).

Seems that, after a disconnection of the phone carrier, these routers block all the ICMP responses with an Identifier field already seen before the disconnection.

You can verify if your router is affected by this problem with the following easy test:

1. ping 8.8.8.8
2. Disconnect the RJ11 phone cable from your router and wait 10 seconds
3. When you start receiving ICMP No route to host messages, reconnect the cable
4. When the router correctly reconnects to the Internet, the previous ping command does not receive ICMP Echo Replies.
5. But a new ping 8.8.8.8 command properly works.

This version changes the Identifier (which, by Linux convention, reports the PID of the process sending the ICMP request) and the modified Identifier field is placed to the same value of the Sequence number. The processing of the incoming ICMP replies has been modified to compare the Indentifier field with the Sequence number.

Features

• Fights again TIM routers stupid features
• Support for DHCP
• Support for PPP
• ISP failover
• Load-balancing (nexthop)
• Optional route rule based on fwmark
• run script when ISP goes up/down

Build requirements

• libev 3 or newer (http://software.schmorp.de/pkg/libev.html)
• asciidoc (optional for creating man pages)

To build pingu without man pages run configure --disable-doc