[strongSwan] DHCP plugin

[Dusan Ilic]

Hello,

I have a problem with the DHCP plugin.
I have Strongswan and DNSmasq on the same host (my Linux gateway) and 
would like to issue IP adress from local LAN to remote access users, 
however, I cant get it working. In the logging I can see Strongswan 
sending DHCP Discover, and DNSmasq responding, however directly after 
DNSmasq gives a strange error.

Jan 22 20:46:42 R6250 daemon.info charon: 08[CFG] sending DHCP DISCOVER to 10.1.1.63
Jan 22 21:46:42 R6250 daemon.info dnsmasq-dhcp[7945]: DHCPDISCOVER(br0) 7a:a7:46:6b:f7:04
Jan 22 21:46:42 R6250 daemon.info dnsmasq-dhcp[7945]: DHCPOFFER(br0) 10.1.1.60 7a:a7:46:6b:f7:04
Jan 22 21:46:42 R6250 daemon.warn dnsmasq-dhcp[7945]: Error sending DHCP packet to 10.1.1.1: Operation not permitted
Jan 22 20:46:47 R6250 daemon.info charon: 08[CFG] DHCP DISCOVER timed out

10.1.1.1 is my gateway. 10.1.1.63 is broadcast adress (local LAN 10.1.1.0/26).
I have also tried changing broadcast in charon settings to 255.255.255.255, but then there is no DHCPOFFER seen in the logs.

Jan 22 20:44:02 R6250 daemon.info charon: 09[CFG] sending DHCP DISCOVER to 255.255.255.255
Jan 22 20:44:03 R6250 daemon.info charon: 09[CFG] sending DHCP DISCOVER to 255.255.255.255
Jan 22 20:44:05 R6250 daemon.info charon: 09[CFG] sending DHCP DISCOVER to 255.255.255.255
Jan 22 20:44:08 R6250 daemon.info charon: 09[CFG] sending DHCP DISCOVER to 255.255.255.255
Jan 22 20:44:12 R6250 daemon.info charon: 09[CFG] sending DHCP DISCOVER to 255.255.255.255
Jan 22 20:44:17 R6250 daemon.info charon: 09[CFG] DHCP DISCOVER timed out

Below is my DHCP-plugin config.

dhcp {

     # Always use the configured server address.
      force_server_address = yes

     # Derive user-defined MAC address from hash of IKE identity.
     # identity_lease = yes

     # Interface name the plugin uses for address allocation.
      interface = br0 # Local interface where DNSmasq is listening

     # Whether to load the plugin. Can also be an integer to increase the
     # priority of this plugin.
     load = yes

     # DHCP server unicast or broadcast IP address.
      server = 10.1.1.63

}

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