[4] | 1 | #-*- mode: Python;-*- |
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| 2 | |
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| 3 | import sys |
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| 4 | import os |
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| 5 | import uuid |
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| 6 | import threading |
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| 7 | import sqlite3 |
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| 8 | |
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| 9 | def _newid(): |
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| 10 | return uuid.uuid4().hex |
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| 11 | |
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| 12 | |
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| 13 | class db(threading.local): |
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| 14 | conn = None |
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| 15 | cursor = None |
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[7] | 16 | _population_sizes = None |
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| 17 | |
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[4] | 18 | def __init__(self, path): |
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| 19 | exists = os.path.exists(path) |
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| 20 | self.conn = sqlite3.connect(path) |
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| 21 | self.conn.execute("PRAGMA foreign_keys = ON;") |
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| 22 | self.conn.row_factory = sqlite3.Row |
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[7] | 23 | self._population_sizes = {} |
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[4] | 24 | |
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| 25 | if not exists: |
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| 26 | self.conn.execute( |
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| 27 | """CREATE TABLE meta (id BLOB PRIMARY KEY, |
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| 28 | tcpts_mean REAL, |
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| 29 | tcpts_stddev REAL, |
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| 30 | tcpts_slopes TEXT) |
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| 31 | """) |
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| 32 | |
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| 33 | self.conn.execute( |
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| 34 | """CREATE TABLE probes (id BLOB PRIMARY KEY, |
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| 35 | sample INTEGER, |
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| 36 | test_case TEXT, |
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| 37 | type TEXT, |
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| 38 | tc_order INTEGER, |
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| 39 | time_of_day INTEGER, |
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| 40 | local_port INTEGER, |
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| 41 | reported INTEGER, |
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| 42 | userspace_rtt INTEGER, |
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| 43 | UNIQUE (sample, test_case)) |
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| 44 | """) |
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| 45 | |
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| 46 | self.conn.execute( |
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| 47 | """CREATE TABLE packets (id BLOB PRIMARY KEY, |
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| 48 | probe_id REFERENCES probes(id) ON DELETE CASCADE, |
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| 49 | sent INTEGER, |
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| 50 | observed INTEGER, |
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| 51 | tsval INTEGER, |
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| 52 | payload_len INTEGER, |
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| 53 | tcpseq INTEGER, |
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| 54 | tcpack INTEGER) |
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| 55 | """) |
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| 56 | |
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| 57 | self.conn.execute( |
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| 58 | """CREATE TABLE analysis (id BLOB PRIMARY KEY, |
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| 59 | probe_id UNIQUE REFERENCES probes(id) ON DELETE CASCADE, |
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| 60 | suspect TEXT, |
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| 61 | packet_rtt INTEGER, |
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| 62 | tsval_rtt INTEGER) |
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| 63 | """) |
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| 64 | |
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| 65 | self.conn.execute( |
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| 66 | """CREATE TABLE trim_analysis (id BLOB PRIMARY KEY, |
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| 67 | probe_id REFERENCES probes(id) ON DELETE CASCADE, |
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| 68 | suspect TEXT, |
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| 69 | packet_rtt INTEGER, |
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| 70 | tsval_rtt INTEGER, |
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| 71 | sent_trimmed INTEGER, |
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| 72 | rcvd_trimmed INTEGER) |
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| 73 | """) |
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| 74 | |
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| 75 | self.conn.execute( |
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| 76 | """CREATE TABLE classifier_results (id BLOB PRIMARY KEY, |
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| 77 | algorithm TEXT, |
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| 78 | params TEXT, |
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| 79 | sample_size INTEGER, |
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| 80 | num_trials INTEGER, |
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| 81 | trial_type TEXT, |
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| 82 | false_positives REAL, |
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| 83 | false_negatives REAL) |
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| 84 | """) |
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| 85 | |
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| 86 | def __del__(self): |
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| 87 | if self.conn: |
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| 88 | self.conn.commit() |
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| 89 | self.conn.close() |
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| 90 | |
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[7] | 91 | def populationSize(self, probe_type): |
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| 92 | if probe_type in self._population_sizes: |
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| 93 | return self._population_sizes[probe_type] |
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| 94 | |
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| 95 | try: |
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| 96 | cursor = self.conn.cursor() |
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| 97 | cursor.execute("SELECT max(c) FROM (SELECT count(sample) c FROM probes WHERE type=? GROUP BY test_case)", (probe_type,)) |
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| 98 | self._population_sizes[probe_type] = cursor.fetchone()[0] |
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| 99 | return self._population_sizes[probe_type] |
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| 100 | except Exception as e: |
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| 101 | print(e) |
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| 102 | return 0 |
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| 103 | |
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[4] | 104 | def _insert(self, table, row): |
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| 105 | rid = _newid() |
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| 106 | keys = row.keys() |
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| 107 | columns = ','.join(keys) |
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| 108 | placeholders = ':'+', :'.join(keys) |
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| 109 | query = "INSERT INTO %s (id,%s) VALUES ('%s',%s)" % (table, columns, rid, placeholders) |
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| 110 | #print(row) |
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| 111 | self.conn.execute(query, row) |
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| 112 | return rid |
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| 113 | |
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| 114 | def addMeta(self, meta): |
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| 115 | ret_val = self._insert('meta', meta) |
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| 116 | self.conn.commit() |
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| 117 | return ret_val |
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| 118 | |
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| 119 | def addProbes(self, p): |
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| 120 | return [self._insert('probes', row) for row in p] |
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| 121 | |
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| 122 | def addPackets(self, pkts, window_size): |
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| 123 | query = ("INSERT INTO packets (id,probe_id,sent,observed,tsval,payload_len,tcpseq,tcpack)" |
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| 124 | " VALUES(randomblob(16)," |
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| 125 | "(SELECT id FROM probes WHERE local_port=:local_port AND :observed>time_of_day" |
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| 126 | " AND :observed<time_of_day+userspace_rtt+%d" |
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| 127 | " ORDER BY time_of_day ASC LIMIT 1)," |
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| 128 | ":sent,:observed,:tsval,:payload_len,:tcpseq,:tcpack)") % window_size |
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| 129 | self.conn.execute("PRAGMA foreign_keys = OFF;") |
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| 130 | self.conn.execute("CREATE INDEX IF NOT EXISTS probes_port ON probes (local_port)") |
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| 131 | cursor = self.conn.cursor() |
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| 132 | #print(query, list(pkts)[0:3]) |
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| 133 | cursor.executemany(query, pkts) |
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| 134 | self.conn.commit() |
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| 135 | self.conn.execute("PRAGMA foreign_keys = ON;") |
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| 136 | |
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| 137 | def addAnalyses(self, analyses): |
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| 138 | return [self._insert('analysis', row) for row in analyses] |
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| 139 | |
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| 140 | def addTrimAnalyses(self, analyses): |
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| 141 | return [self._insert('trim_analysis', row) for row in analyses] |
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| 142 | |
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| 143 | def addClassifierResults(self, results): |
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| 144 | ret_val = self._insert('classifier_results', results) |
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| 145 | self.conn.commit() |
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| 146 | return ret_val |
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