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54670817fa
* origin/topic/seth/tunnels-merge: Fixed some problems with the SOCKS analyzer and tests. Conflicts: scripts/base/protocols/socks/main.bro src/socks-analyzer.pac
87 lines
2.6 KiB
Text
87 lines
2.6 KiB
Text
@load base/frameworks/tunnels
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@load ./consts
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module SOCKS;
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export {
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redef enum Log::ID += { LOG };
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type Info: record {
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## Time when the proxy connection was first detected.
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ts: time &log;
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uid: string &log;
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id: conn_id &log;
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## Protocol version of SOCKS.
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version: count &log;
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## Username for the proxy if extracted from the network.
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user: string &log &optional;
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## Server status for the attempt at using the proxy.
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status: string &log &optional;
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## Client requested SOCKS address. Could be an address, a name or both.
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request: SOCKS::Address &log &optional;
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## Client requested port.
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request_p: port &log &optional;
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## Server bound address. Could be an address, a name or both.
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bound: SOCKS::Address &log &optional;
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## Server bound port.
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bound_p: port &log &optional;
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};
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## Event that can be handled to access the SOCKS
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## record as it is sent on to the logging framework.
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global log_socks: event(rec: Info);
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}
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event bro_init() &priority=5
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{
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Log::create_stream(SOCKS::LOG, [$columns=Info, $ev=log_socks]);
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}
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redef record connection += {
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socks: SOCKS::Info &optional;
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};
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# Configure DPD
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redef capture_filters += { ["socks"] = "tcp port 1080" };
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redef dpd_config += { [ANALYZER_SOCKS] = [$ports = set(1080/tcp)] };
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redef likely_server_ports += { 1080/tcp };
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function set_session(c: connection, version: count)
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{
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if ( ! c?$socks )
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c$socks = [$ts=network_time(), $id=c$id, $uid=c$uid, $version=version];
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}
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event socks_request(c: connection, version: count, request_type: count,
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sa: SOCKS::Address, p: port, user: string) &priority=5
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{
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set_session(c, version);
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c$socks$request = sa;
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c$socks$request_p = p;
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# Copy this conn_id and set the orig_p to zero because in the case of SOCKS proxies there will
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# be potentially many source ports since a new proxy connection is established for each
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# proxied connection. We treat this as a singular "tunnel".
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local cid = copy(c$id);
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cid$orig_p = 0/tcp;
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Tunnel::register([$cid=cid, $tunnel_type=Tunnel::SOCKS, $payload_proxy=T]);
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}
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event socks_reply(c: connection, version: count, reply: count, sa: SOCKS::Address, p: port) &priority=5
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{
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set_session(c, version);
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if ( version == 5 )
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c$socks$status = v5_status[reply];
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else if ( version == 4 )
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c$socks$status = v4_status[reply];
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c$socks$bound = sa;
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c$socks$bound_p = p;
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}
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event socks_reply(c: connection, version: count, reply: count, sa: SOCKS::Address, p: port) &priority=-5
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{
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Log::write(SOCKS::LOG, c$socks);
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}
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