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comparison plugins/mod_proxy65.lua @ 11012:027af78d8125

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mod_proxy65: Limit dump of invalid data to 300 bytes (like mod_c2s)
author Kim Alvefur <zash@zash.se>
date Fri, 17 Jul 2020 08:29:03 +0200
parents c079103c9172
children 3bbb1af92514
comparison
equal deleted inserted replaced
11011:c079103c9172 11012:027af78d8125
42 return; 42 return;
43 end 43 end
44 end -- else error, unexpected input 44 end -- else error, unexpected input
45 conn:write("\5\255"); -- send (SOCKS version 5, no acceptable method) 45 conn:write("\5\255"); -- send (SOCKS version 5, no acceptable method)
46 conn:close(); 46 conn:close();
47 module:log("debug", "Invalid SOCKS5 greeting received: %q", data); 47 module:log("debug", "Invalid SOCKS5 greeting received: %q", data:sub(1, 300));
48 else -- connection request 48 else -- connection request
49 --local head = string.char( 0x05, 0x01, 0x00, 0x03, 40 ); -- ( VER=5=SOCKS5, CMD=1=CONNECT, RSV=0=RESERVED, ATYP=3=DOMAIMNAME, SHA-1 size ) 49 --local head = string.char( 0x05, 0x01, 0x00, 0x03, 40 ); -- ( VER=5=SOCKS5, CMD=1=CONNECT, RSV=0=RESERVED, ATYP=3=DOMAIMNAME, SHA-1 size )
50 if #data == 47 and data:sub(1,5) == "\5\1\0\3\40" and data:sub(-2) == "\0\0" then 50 if #data == 47 and data:sub(1,5) == "\5\1\0\3\40" and data:sub(-2) == "\0\0" then
51 local sha = data:sub(6, 45); 51 local sha = data:sub(6, 45);
52 conn:pause(); 52 conn:pause();
64 server.link(transfers[sha].target, conn, max_buffer_size); 64 server.link(transfers[sha].target, conn, max_buffer_size);
65 end 65 end
66 else -- error, unexpected input 66 else -- error, unexpected input
67 conn:write("\5\1\0\3\0\0\0"); -- VER, REP, RSV, ATYP, BND.ADDR (sha), BND.PORT (2 Byte) 67 conn:write("\5\1\0\3\0\0\0"); -- VER, REP, RSV, ATYP, BND.ADDR (sha), BND.PORT (2 Byte)
68 conn:close(); 68 conn:close();
69 module:log("debug", "Invalid SOCKS5 negotiation received: %q", data); 69 module:log("debug", "Invalid SOCKS5 negotiation received: %q", data:sub(1, 300));
70 end 70 end
71 end 71 end
72 end 72 end
73 73
74 function listener.ondisconnect(conn) 74 function listener.ondisconnect(conn)