bool filter(char *data, int &len){
if (config.drop){
if (!drop_packet(data, len)) return false;
}
if (config.corrupt_packets
&& config.corrupt_bytes
&& rand_test(config.corrupt_packets)){
corrupt_packet(data, len);
}
if (config.truncate_len){
len = MIN(len, config.truncate_len);
}
return true;
}
static bool
rate_limit_local_packet_cb(struct relay *r, void *rl_)
{
struct rate_limiter *rl = rl_;
const struct settings *s = rl->s;
struct ofp_packet_in *opi;
opi = get_ofp_packet_in(r);
if (!opi) {
return false;
}
if (opi->reason == OFPR_ACTION) {
/* Don't rate-limit 'ofp-packet_in's generated by flows that the
* controller set up. XXX we should really just rate-limit them
* *separately* so that no one can flood the controller this way. */
return false;
}
if (!rl->n_queued && get_token(rl)) {
/* In the common case where we are not constrained by the rate limit,
* let the packet take the normal path. */
rl->n_normal++;
return false;
} else {
/* Otherwise queue it up for the periodic callback to drain out. */
struct ofpbuf *msg = r->halves[HALF_LOCAL].rxbuf;
int port = ntohs(opi->in_port) % OFPP_MAX;
if (rl->n_queued >= s->burst_limit) {
drop_packet(rl);
}
queue_push_tail(&rl->queues[port], ofpbuf_clone(msg));
rl->n_queued++;
rl->n_limited++;
return true;
}
}
