Watchdog源码--SearchForBlackHole

/**
 * Search for a black hole node.
*/
void
NEIGHBOURS::SearchForBlackHole(int percentile_of_loss, int32_t ownIP, int heartbeat_malicious, int immediate_reaction_duration, double pktime) {
int j;
char text[200];
char protocol_name[MAX_PROTOCOL_NAME];
    neighbour *n;
double percentage;

    n = neigs->group;

while (n != NULL) {
/* Porcentaje dividido por protocolos y puertos */
for (j = 0; j < NUMBER_PROTOCOLS; j++) {
if (n->pckts->received_packets(j) > MIN_SIGNIFICANT_PACKETS) {
                percentage = ((1 - ((n->pckts->forwarded_packets(j) + n->pckts->stored_packets_protocol(j)) / (n->pckts->received_packets(j)))) * 100);
            } else {
                percentage = -1;
            }
if (percentage > max_percentage) {
                max_percentage = percentage;
            }

if ((percentage > percentile_of_loss && (pktime > n->malicious_node + heartbeat_malicious))) {
                obtainNameProtocol(protocol_name, j);
                sprintf(text, "\nAlarm! Alarm! node %d (mac %d) not forward more than %d%% packets: %.2f%% loss for %s, %.2f secs of execution and %.2f secs from neighbour detection\n",
                        n->ip, n->mac, percentile_of_loss, percentage, protocol_name, pktime - start_time, pktime - n->starting_time);
                n->malicious_node = pktime;
//SendAnAlarm(text, n, ownIP, gw_ip, port, finish);
                printf("%s", text);

if (finish) {
                    exit(0);
                }
            }
if ((percentage > percentile_of_loss && (immediate_reaction_duration > 0) && (pktime > n->malicious_node + immediate_reaction_duration))) {
//immediateReaction(n->mac, immediate_reaction_duration);
            }
        }
        n = n->next;
    }
}

转载于:https://www.cnblogs.com/zhangrui/archive/2012/03/08/2385330.html