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[ADD] reworked code to new design suggested by seth.

Browse source 
The openflow framework now supports multiple
controllers. The design now looks a bit object
oriented and a new() function creates a controller
record.

Moved the JSON script from the JSON namespace into a
openflow specific OpenflowJSON namespace
This commit is contained in:
Christian Struck 2014-11-13 16:49:50 -08:00
parent fef8476690
commit d80cc9ea10
4 changed files with 158 additions and 166 deletions
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13
scripts/site/openflow-shunt.bro
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@ -2,8 +2,10 @@
@load base/frameworks/notice
@load base/frameworks/openflow
module OpenflowShunt;
# pox
# global param_dpid = "00-24-a8-5c-0c-00|15" &redef;
# global param_port = "\"OFPP_ALL\"" &redef;
@ -12,7 +14,6 @@ module OpenflowShunt;
# default constants which are not automatically gathered.
redef Openflow::controller_ip = "10.255.0.20";
const dpid = 4222282094087168;
const cookie = 0;
const idle_timeout = 30;
@ -38,6 +39,7 @@ export {
function size_callback(c: connection, cnt: count): interval
{
local controller = OpenflowRyu::new(10.255.0.20, 8080, dpid);
# print Openflow::flow_stats(dpid);
# if traffic exceeds the given threshold, remove flow.
if ( c$orig$num_bytes_ip + c$resp$num_bytes_ip >= size_threshold )
@ -45,8 +47,8 @@ function size_callback(c: connection, cnt: count): interval
# create openflow flow_mod add records from connection data and give default constants
local actions: vector of Openflow::ofp_action_output;
local reverse_actions: vector of Openflow::ofp_action_output;
actions[|actions|] = Openflow::ofp_action_output($_port=out_port);
reverse_actions[|reverse_actions|] = Openflow::ofp_action_output($_port=in_port);
actions[|actions|] = Openflow::ofp_action_output($port_=out_port);
reverse_actions[|reverse_actions|] = Openflow::ofp_action_output($port_=in_port);
# flow layer 4 protocol
local nw_proto = Openflow::IP_TCP;
if(is_udp_port(c$id$orig_p))
@ -93,9 +95,8 @@ function size_callback(c: connection, cnt: count): interval
];
# call openflow framework
if(Openflow::flow_mod(dpid, flow_mod) && Openflow::flow_mod(dpid, reverse_flow_mod)) {
if(Openflow::flow_mod(controller, flow_mod) && Openflow::flow_mod(controller, reverse_flow_mod))
event shunt_triggered(c);
}
if(delete_flow)
{
@ -132,7 +133,7 @@ event Openflow::flow_mod_failure(flow_mod: Openflow::ofp_flow_mod, msg: string)
}
event Openflow::ryu_error(flow_mod: Openflow::ofp_flow_mod, error: Openflow::RyuError, msg: string)
event OpenflowRyu::error(flow_mod: Openflow::ofp_flow_mod, error: OpenflowRyu::Error, msg: string)
{
print fmt("ERROR: %s, msg: %s\n%s", error, msg, flow_mod);
}