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Move detect-protocol from frameworks/dpd to frameworks/analyzer
detect-protocol.zeek was the last non-deprecated script left in policy/frameworks/dpd. It was moved to policy/frameworks/analyzer. A script that loads the script from the new location with a deprecation warning was added.
This commit is contained in:
Johanna Amann
parent
58613f0313
commit
f02e817aea
5 changed files with 246 additions and 239 deletions
238
scripts/policy/frameworks/analyzer/detect-protocols.zeek
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238
scripts/policy/frameworks/analyzer/detect-protocols.zeek
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@ -0,0 +1,238 @@
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##! Finds connections with protocols on non-standard ports with DPD.
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@load base/frameworks/notice
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@load base/utils/site
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@load base/utils/conn-ids
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@load base/protocols/conn/removal-hooks
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module ProtocolDetector;
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export {
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redef enum Notice::Type += {
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Protocol_Found,
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Server_Found,
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};
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# Table of (protocol, resp_h, resp_p) tuples known to be uninteresting
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# in the given direction. For all other protocols detected on
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# non-standard ports, we raise a Protocol_Found notice. (More specific
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# filtering can then be done via notice_filters.)
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#
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# Use 0.0.0.0 for to wildcard-match any resp_h.
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type dir: enum { NONE, INCOMING, OUTGOING, BOTH };
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option valids: table[AllAnalyzers::Tag, addr, port] of dir = {
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# A couple of ports commonly used for benign HTTP servers.
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# For now we want to see everything.
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 81/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 82/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 83/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 88/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 8001/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 8090/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 8081/tcp] = OUTGOING,
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#
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 6346/tcp] = BOTH, # Gnutella
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 6347/tcp] = BOTH, # Gnutella
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 6348/tcp] = BOTH, # Gnutella
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};
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# Set of analyzers for which we suppress Server_Found notices
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# (but not Protocol_Found). Along with avoiding clutter in the
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# log files, this also saves memory because for these we don't
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# need to remember which servers we already have reported, which
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# for some can be a lot.
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option suppress_servers: set [AllAnalyzers::Tag] = {
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# Analyzer::ANALYZER_HTTP
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};
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# We consider a connection to use a protocol X if the analyzer for X
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# is still active (i) after an interval of minimum_duration, or (ii)
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# after a payload volume of minimum_volume, or (iii) at the end of the
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# connection.
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option minimum_duration = 30 secs;
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option minimum_volume = 4e3; # bytes
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# How often to check the size of the connection.
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const check_interval = 5 secs;
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# Entry point for other analyzers to report that they recognized
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# a certain (sub-)protocol.
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global found_protocol: function(c: connection, analyzer: AllAnalyzers::Tag,
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protocol: string);
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# Table keeping reported (server, port, analyzer) tuples (and their
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# reported sub-protocols).
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global servers: table[addr, port, string] of set[string]
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&read_expire = 14 days;
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## Non-standard protocol port detection finalization hook.
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global finalize_protocol_detection: Conn::RemovalHook;
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}
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# Table that tracks currently active dynamic analyzers per connection.
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global conns: table[conn_id] of set[AllAnalyzers::Tag];
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# Table of reports by other analyzers about the protocol used in a connection.
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global protocols: table[conn_id] of set[string];
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type protocol : record {
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a: string; # analyzer name
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sub: string; # "sub-protocols" reported by other sources
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};
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function get_protocol(c: connection, a: AllAnalyzers::Tag) : protocol
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{
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local str = "";
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if ( c$id in protocols )
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{
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for ( p in protocols[c$id] )
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str = |str| > 0 ? fmt("%s/%s", str, p) : p;
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}
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return [$a=Analyzer::name(a), $sub=str];
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}
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function fmt_protocol(p: protocol) : string
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{
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return p$sub != "" ? fmt("%s (via %s)", p$sub, p$a) : p$a;
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}
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function do_notice(c: connection, a: AllAnalyzers::Tag, d: dir)
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{
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if ( d == BOTH )
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return;
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if ( d == INCOMING && Site::is_local_addr(c$id$resp_h) )
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return;
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if ( d == OUTGOING && ! Site::is_local_addr(c$id$resp_h) )
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return;
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local p = get_protocol(c, a);
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local s = fmt_protocol(p);
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NOTICE([$note=Protocol_Found,
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$msg=fmt("%s %s on port %s", id_string(c$id), s, c$id$resp_p),
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$sub=s, $conn=c]);
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# We report multiple Server_Found's per host if we find a new
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# sub-protocol.
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local known = [c$id$resp_h, c$id$resp_p, p$a] in servers;
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local newsub = F;
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if ( known )
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newsub = (p$sub != "" &&
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p$sub !in servers[c$id$resp_h, c$id$resp_p, p$a]);
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if ( (! known || newsub) && a !in suppress_servers )
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{
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NOTICE([$note=Server_Found,
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$msg=fmt("%s: %s server on port %s%s", c$id$resp_h, s,
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c$id$resp_p, (known ? " (update)" : "")),
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$p=c$id$resp_p, $sub=s, $conn=c, $src=c$id$resp_h]);
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if ( ! known )
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servers[c$id$resp_h, c$id$resp_p, p$a] = set();
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add servers[c$id$resp_h, c$id$resp_p, p$a][p$sub];
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}
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}
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function report_protocols(c: connection)
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{
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# We only report the connection if both sides have transferred data.
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if ( c$resp$size == 0 || c$orig$size == 0 )
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{
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delete conns[c$id];
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delete protocols[c$id];
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return;
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}
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local analyzers = conns[c$id];
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for ( a in analyzers )
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{
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if ( [a, c$id$resp_h, c$id$resp_p] in valids )
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do_notice(c, a, valids[a, c$id$resp_h, c$id$resp_p]);
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else if ( [a, 0.0.0.0, c$id$resp_p] in valids )
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do_notice(c, a, valids[a, 0.0.0.0, c$id$resp_p]);
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else
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do_notice(c, a, NONE);
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}
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delete conns[c$id];
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delete protocols[c$id];
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}
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event ProtocolDetector::check_connection(c: connection)
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{
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if ( c$id !in conns )
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return;
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local duration = network_time() - c$start_time;
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local size = c$resp$size + c$orig$size;
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if ( duration >= minimum_duration || size >= minimum_volume )
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report_protocols(c);
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else
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{
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local delay = min_interval(minimum_duration - duration,
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check_interval);
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schedule delay { ProtocolDetector::check_connection(c) };
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}
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}
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hook finalize_protocol_detection(c: connection)
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{
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if ( c$id !in conns )
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{
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delete protocols[c$id];
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return;
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}
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# Reports all analyzers that have remained to the end.
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report_protocols(c);
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}
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event analyzer_confirmation_info(atype: AllAnalyzers::Tag, info: AnalyzerConfirmationInfo)
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{
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if ( ! is_protocol_analyzer(atype) )
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return;
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local c = info$c;
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# Don't report anything running on a well-known port.
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if ( c$id$resp_p in Analyzer::registered_ports(atype) )
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return;
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if ( c$id in conns )
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{
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local analyzers = conns[c$id];
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add analyzers[atype];
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}
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else
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{
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conns[c$id] = set(atype);
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Conn::register_removal_hook(c, finalize_protocol_detection);
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local delay = min_interval(minimum_duration, check_interval);
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schedule delay { ProtocolDetector::check_connection(c) };
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}
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}
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function found_protocol(c: connection, atype: AllAnalyzers::Tag, protocol: string)
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{
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# Don't report anything running on a well-known port.
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if ( c$id$resp_p in Analyzer::registered_ports(atype) )
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return;
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if ( c$id !in protocols )
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protocols[c$id] = set();
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add protocols[c$id][protocol];
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Conn::register_removal_hook(c, finalize_protocol_detection);
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}
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@ -1,238 +1,3 @@
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##! Finds connections with protocols on non-standard ports with DPD.
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@deprecated("frameworks/dpd/detect-protocols.zeek moved to frameworks/analyzer/detect-protocols.zeek. Please switch to frameworks/analyzer/detect-protocols.zeek. Remove in 8.1")
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@load base/frameworks/notice
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@load base/utils/site
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@load base/utils/conn-ids
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@load base/protocols/conn/removal-hooks
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module ProtocolDetector;
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export {
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redef enum Notice::Type += {
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Protocol_Found,
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Server_Found,
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};
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# Table of (protocol, resp_h, resp_p) tuples known to be uninteresting
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# in the given direction. For all other protocols detected on
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# non-standard ports, we raise a Protocol_Found notice. (More specific
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# filtering can then be done via notice_filters.)
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#
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# Use 0.0.0.0 for to wildcard-match any resp_h.
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type dir: enum { NONE, INCOMING, OUTGOING, BOTH };
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option valids: table[AllAnalyzers::Tag, addr, port] of dir = {
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# A couple of ports commonly used for benign HTTP servers.
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# For now we want to see everything.
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 81/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 82/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 83/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 88/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 8001/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 8090/tcp] = OUTGOING,
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 8081/tcp] = OUTGOING,
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#
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 6346/tcp] = BOTH, # Gnutella
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 6347/tcp] = BOTH, # Gnutella
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# [Analyzer::ANALYZER_HTTP, 0.0.0.0, 6348/tcp] = BOTH, # Gnutella
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};
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# Set of analyzers for which we suppress Server_Found notices
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# (but not Protocol_Found). Along with avoiding clutter in the
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# log files, this also saves memory because for these we don't
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# need to remember which servers we already have reported, which
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# for some can be a lot.
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option suppress_servers: set [AllAnalyzers::Tag] = {
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# Analyzer::ANALYZER_HTTP
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};
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# We consider a connection to use a protocol X if the analyzer for X
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# is still active (i) after an interval of minimum_duration, or (ii)
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# after a payload volume of minimum_volume, or (iii) at the end of the
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# connection.
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option minimum_duration = 30 secs;
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option minimum_volume = 4e3; # bytes
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# How often to check the size of the connection.
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const check_interval = 5 secs;
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# Entry point for other analyzers to report that they recognized
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# a certain (sub-)protocol.
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global found_protocol: function(c: connection, analyzer: AllAnalyzers::Tag,
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protocol: string);
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# Table keeping reported (server, port, analyzer) tuples (and their
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# reported sub-protocols).
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global servers: table[addr, port, string] of set[string]
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&read_expire = 14 days;
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## Non-standard protocol port detection finalization hook.
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global finalize_protocol_detection: Conn::RemovalHook;
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}
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# Table that tracks currently active dynamic analyzers per connection.
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global conns: table[conn_id] of set[AllAnalyzers::Tag];
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# Table of reports by other analyzers about the protocol used in a connection.
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global protocols: table[conn_id] of set[string];
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type protocol : record {
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a: string; # analyzer name
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sub: string; # "sub-protocols" reported by other sources
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};
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function get_protocol(c: connection, a: AllAnalyzers::Tag) : protocol
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{
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local str = "";
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if ( c$id in protocols )
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{
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for ( p in protocols[c$id] )
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str = |str| > 0 ? fmt("%s/%s", str, p) : p;
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}
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return [$a=Analyzer::name(a), $sub=str];
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}
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function fmt_protocol(p: protocol) : string
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{
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return p$sub != "" ? fmt("%s (via %s)", p$sub, p$a) : p$a;
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}
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function do_notice(c: connection, a: AllAnalyzers::Tag, d: dir)
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{
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if ( d == BOTH )
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return;
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if ( d == INCOMING && Site::is_local_addr(c$id$resp_h) )
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return;
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if ( d == OUTGOING && ! Site::is_local_addr(c$id$resp_h) )
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return;
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local p = get_protocol(c, a);
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local s = fmt_protocol(p);
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NOTICE([$note=Protocol_Found,
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$msg=fmt("%s %s on port %s", id_string(c$id), s, c$id$resp_p),
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$sub=s, $conn=c]);
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# We report multiple Server_Found's per host if we find a new
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# sub-protocol.
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local known = [c$id$resp_h, c$id$resp_p, p$a] in servers;
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local newsub = F;
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if ( known )
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newsub = (p$sub != "" &&
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p$sub !in servers[c$id$resp_h, c$id$resp_p, p$a]);
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if ( (! known || newsub) && a !in suppress_servers )
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{
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NOTICE([$note=Server_Found,
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$msg=fmt("%s: %s server on port %s%s", c$id$resp_h, s,
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c$id$resp_p, (known ? " (update)" : "")),
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$p=c$id$resp_p, $sub=s, $conn=c, $src=c$id$resp_h]);
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if ( ! known )
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servers[c$id$resp_h, c$id$resp_p, p$a] = set();
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add servers[c$id$resp_h, c$id$resp_p, p$a][p$sub];
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}
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}
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function report_protocols(c: connection)
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{
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# We only report the connection if both sides have transferred data.
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if ( c$resp$size == 0 || c$orig$size == 0 )
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{
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delete conns[c$id];
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delete protocols[c$id];
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return;
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}
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local analyzers = conns[c$id];
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for ( a in analyzers )
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{
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if ( [a, c$id$resp_h, c$id$resp_p] in valids )
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do_notice(c, a, valids[a, c$id$resp_h, c$id$resp_p]);
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else if ( [a, 0.0.0.0, c$id$resp_p] in valids )
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do_notice(c, a, valids[a, 0.0.0.0, c$id$resp_p]);
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else
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do_notice(c, a, NONE);
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}
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delete conns[c$id];
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delete protocols[c$id];
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}
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event ProtocolDetector::check_connection(c: connection)
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{
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if ( c$id !in conns )
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return;
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local duration = network_time() - c$start_time;
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local size = c$resp$size + c$orig$size;
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if ( duration >= minimum_duration || size >= minimum_volume )
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report_protocols(c);
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else
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{
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local delay = min_interval(minimum_duration - duration,
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check_interval);
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schedule delay { ProtocolDetector::check_connection(c) };
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}
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}
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hook finalize_protocol_detection(c: connection)
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{
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if ( c$id !in conns )
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{
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delete protocols[c$id];
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return;
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}
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# Reports all analyzers that have remained to the end.
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report_protocols(c);
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}
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event analyzer_confirmation_info(atype: AllAnalyzers::Tag, info: AnalyzerConfirmationInfo)
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{
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if ( ! is_protocol_analyzer(atype) )
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return;
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local c = info$c;
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|
||||
# Don't report anything running on a well-known port.
|
||||
if ( c$id$resp_p in Analyzer::registered_ports(atype) )
|
||||
return;
|
||||
|
||||
if ( c$id in conns )
|
||||
{
|
||||
local analyzers = conns[c$id];
|
||||
add analyzers[atype];
|
||||
}
|
||||
else
|
||||
{
|
||||
conns[c$id] = set(atype);
|
||||
Conn::register_removal_hook(c, finalize_protocol_detection);
|
||||
|
||||
local delay = min_interval(minimum_duration, check_interval);
|
||||
schedule delay { ProtocolDetector::check_connection(c) };
|
||||
}
|
||||
}
|
||||
|
||||
function found_protocol(c: connection, atype: AllAnalyzers::Tag, protocol: string)
|
||||
{
|
||||
# Don't report anything running on a well-known port.
|
||||
if ( c$id$resp_p in Analyzer::registered_ports(atype) )
|
||||
return;
|
||||
|
||||
if ( c$id !in protocols )
|
||||
protocols[c$id] = set();
|
||||
|
||||
add protocols[c$id][protocol];
|
||||
Conn::register_removal_hook(c, finalize_protocol_detection);
|
||||
}
|
||||
@load frameworks/analyzer/detect-protocols.zeek
|
||||
|
|
|
|||
|
|
@ -10,6 +10,7 @@
|
|||
# The base/ scripts are all loaded by default and not included here.
|
||||
|
||||
@load frameworks/analyzer/debug-logging.zeek
|
||||
@load frameworks/analyzer/detect-protocols.zeek
|
||||
# @load frameworks/analyzer/deprecated-dpd-log.zeek
|
||||
@load frameworks/analyzer/packet-segment-logging.zeek
|
||||
# @load frameworks/control/controllee.zeek
|
||||
|
|
@ -49,7 +50,7 @@
|
|||
@load frameworks/management/request.zeek
|
||||
@load frameworks/management/types.zeek
|
||||
@load frameworks/management/util.zeek
|
||||
@load frameworks/dpd/detect-protocols.zeek
|
||||
# @load frameworks/dpd/detect-protocols.zeek
|
||||
# @load frameworks/dpd/packet-segment-logging.zeek
|
||||
@load frameworks/intel/do_notice.zeek
|
||||
@load frameworks/intel/do_expire.zeek
|
||||
|
|
|
|||
|
|
@ -2,6 +2,7 @@
|
|||
|
||||
# Scripts which are commented out in test-all-policy.zeek.
|
||||
@load frameworks/analyzer/deprecated-dpd-log.zeek
|
||||
@load frameworks/dpd/detect-protocols.zeek
|
||||
@load protocols/ssl/decryption.zeek
|
||||
@ifdef ( Cluster::CLUSTER_BACKEND_ZEROMQ )
|
||||
@load frameworks/cluster/backend/zeromq/connect.zeek
|
||||
|
|
|
|||
|
|
@ -1,5 +1,7 @@
|
|||
### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
|
||||
### NOTE: This file has been sorted with diff-sort.
|
||||
warning in <...>/detect-protocols.zeek, line 1: deprecated script loaded from <...>/__load__.zeek:5 ("frameworks<...>/detect-protocols.zeek moved to frameworks<...>/detect-protocols.zeek. Please switch to frameworks<...>/detect-protocols.zeek. Remove in 8.1")
|
||||
warning in <...>/detect-protocols.zeek, line 1: deprecated script loaded from command line arguments ("frameworks<...>/detect-protocols.zeek moved to frameworks<...>/detect-protocols.zeek. Please switch to frameworks<...>/detect-protocols.zeek. Remove in 8.1")
|
||||
warning in <...>/detect-sqli.zeek, line 16: deprecated script loaded from command line arguments "Remove in v8.1: Switch to the improved detect-sql-injection script"
|
||||
warning in <...>/packet-segment-logging.zeek, line 1: deprecated script loaded from <...>/__load__.zeek:12 ("Please switch to frameworks<...>/packet-segment-logging, which logs to analyzer.log. Remove in 8.1")
|
||||
warning in <...>/packet-segment-logging.zeek, line 1: deprecated script loaded from <...>/__load__.zeek:13 ("Please switch to frameworks<...>/packet-segment-logging, which logs to analyzer.log. Remove in 8.1")
|
||||
warning in <...>/packet-segment-logging.zeek, line 1: deprecated script loaded from command line arguments ("Please switch to frameworks<...>/packet-segment-logging, which logs to analyzer.log. Remove in 8.1")
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue