def get_pktsize_distribution_info(db_name, coll_name):
#create a distribution
#create the first entry before starting the loop
pktsize_bin = { 'start': 0, 'end': PKTSIZE_BIN_SIZE, 'count': 0, 'count_percentage': 0.0 }
pktsize_distribution =[]
pktsize_distribution.append(pktsize_bin)
for i in range(MAX_PACKETSIZE_BINS - 1):
pktsize_bin = { 'start': pktsize_distribution[i]['end'] + 1, 'end': pktsize_distribution[i]['end'] + PKTSIZE_BIN_SIZE, 'count': 0, 'count_percentage': 0.0 }
pktsize_distribution.append(pktsize_bin)
#make the last bin all the way to max packet size to cover all possible packet sizes
pktsize_distribution[MAX_PACKETSIZE_BINS - 1]['end'] = MAX_POSSIBLE_PACKET_SIZE
#map reduce to find out the count of packets for each packet size
mapper = Code("""
function () {
emit(String(this.network.total_length), 1);
}
""")
reducer = Code("""
function (key, values) {
return Array.sum(values);
}
""")
status, error_text, coll = dbif.db_do_mapreduce(db_name, coll_name, mapper, reducer, 'pktsize_distribution')
total_count = 0
for doc in coll.find():
length = int(doc['_id'])
index = length / PKTSIZE_BIN_SIZE;
if length % PKTSIZE_BIN_SIZE == 0:
index -= 1;
if index >= MAX_PACKETSIZE_BINS:
index = MAX_PACKETSIZE_BINS - 1
pktsize_distribution[index]['count'] += int(doc['value'])
total_count += int(doc['value'])
#now calculate percentages
for i in range(MAX_PACKETSIZE_BINS):
pktsize_distribution[i]['count_percentage'] = (pktsize_distribution[i]['count'] * 100.0) / total_count
logger.info(pktsize_distribution)
return pktsize_distribution
def get_quic_info(db_name, coll_name):
# map reduce to find out the count of packets for each packet size
mapper = Code(
"""
function () {
if (this.transport.protocol == "UDP" && (this.transport.src_port == 443 || this.transport.dest_port == 443))
{
emit("quic_pkts", 1);
emit("quic_bytes", this.network.total_length);
emit("total_pkts", 1);
emit("total_bytes", this.network.total_length);
}
else
{
emit("total_pkts", 1);
emit("total_bytes", this.network.total_length);
}
}
"""
)
reducer = Code(
"""
function (key, values) {
return Array.sum(values);
}
"""
)
status, error_text, coll = dbif.db_do_mapreduce(db_name, coll_name, mapper, reducer, "quic_info")
quic_info = {}
for doc in coll.find():
print doc
quic_info[doc["_id"]] = int(doc["value"])
quic_info["pkts_percentage"] = (quic_info["quic_pkts"] * 100.0) / quic_info["total_pkts"]
quic_info["bytes_percentage"] = (quic_info["quic_bytes"] * 100.0) / quic_info["total_bytes"]
logger.info(quic_info)
return quic_info
