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[ADD] status function to get flows from switch, error handling.

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Added a function to receive status from the switch through the
openflow controller. (not yet implemented anywhere)

The flow_mod and flow_stats function now have default values which
report that the function is not implemented when they're called but
no plugin has registered its functions for them.
This commit is contained in:
Christian Struck 2014-11-06 15:53:09 -08:00
parent c705375537
commit 8e2c269c2e
4 changed files with 59 additions and 19 deletions
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21
scripts/site/openflow-shunt.bro
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@ -19,9 +19,9 @@ const idle_timeout = 30;
const hard_timeout = 0;
const in_port = 3;
const out_port = 1;
global delete_flow: bool = F;
export {
## Number of bytes transferred before shunting a flow.
const size_threshold = 1024000 &redef;
@ -35,22 +35,14 @@ export {
global shunt_triggered: event(c: connection);
}
function size_callback(c: connection, cnt: count): interval
{
# print flow traffic.
print fmt(
"%s:%s <-> %s:%s reached %s/%s",
c$id$orig_h,
port_to_count(c$id$orig_p),
c$id$resp_h,
port_to_count(c$id$resp_p),
c$orig$num_bytes_ip + c$resp$num_bytes_ip,
size_threshold
);
# 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 )
{
# create openflow flow_mod add records from connection data and given default constants
# 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);
@ -120,21 +112,26 @@ function size_callback(c: connection, cnt: count): interval
return poll_interval;
}
event connection_established(c: connection)
{
print fmt("new connection");
ConnPolling::watch(c, size_callback, 0, 0secs);
}
event Openflow::flow_mod_success(flow_mod: Openflow::ofp_flow_mod, msg: string)
{
print fmt("succsess, %s", cat(flow_mod));
}
event Openflow::flow_mod_failure(flow_mod: Openflow::ofp_flow_mod, msg: string)
{
print fmt("failed, %s", cat(flow_mod));
}
event Openflow::ryu_error(flow_mod: Openflow::ofp_flow_mod, error: Openflow::RyuError, msg: string)
{
print fmt("ERROR: %s, msg: %s\n%s", error, msg, flow_mod);