1 //-------------------------------------------------------------------------- 2 // Copyright (C) 2015-2021 Cisco and/or its affiliates. All rights reserved. 3 // 4 // This program is free software; you can redistribute it and/or modify it 5 // under the terms of the GNU General Public License Version 2 as published 6 // by the Free Software Foundation. You may not use, modify or distribute 7 // this program under any other version of the GNU General Public License. 8 // 9 // This program is distributed in the hope that it will be useful, but 10 // WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 // General Public License for more details. 13 // 14 // You should have received a copy of the GNU General Public License along 15 // with this program; if not, write to the Free Software Foundation, Inc., 16 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 17 //-------------------------------------------------------------------------- 18 19 // tcp_stream_config.h author davis mcpherson <davmcphe@cisco.com> 20 // Created on: Oct 22, 2015 21 22 #ifndef TCP_STREAM_CONFIG_H 23 #define TCP_STREAM_CONFIG_H 24 25 #include "protocols/packet.h" 26 #include "stream/tcp/tcp_defs.h" 27 #include "time/packet_time.h" 28 29 #define STREAM_CONFIG_SHOW_PACKETS 0x00000001 30 #define STREAM_CONFIG_NO_ASYNC_REASSEMBLY 0x00000002 31 #define STREAM_CONFIG_NO_REASSEMBLY 0x00000004 32 33 #define STREAM_DEFAULT_SSN_TIMEOUT 30 34 35 class TcpStreamConfig 36 { 37 public: 38 TcpStreamConfig(); 39 require_3whs()40 bool require_3whs() 41 { 42 return hs_timeout >= 0; 43 } 44 midstream_allowed(snort::Packet * p)45 bool midstream_allowed(snort::Packet* p) 46 { 47 if ( ( hs_timeout < 0 ) || ( p->pkth->ts.tv_sec - packet_first_time() < hs_timeout ) ) 48 return true; 49 50 return false; 51 } 52 53 void show() const; 54 55 StreamPolicy policy = StreamPolicy::OS_DEFAULT; 56 57 uint16_t flags = 0; 58 uint16_t flush_factor = 0; 59 60 uint32_t session_timeout = STREAM_DEFAULT_SSN_TIMEOUT; 61 uint32_t max_window = 0; 62 uint32_t overlap_limit = 0; 63 64 uint32_t max_queued_bytes = 4194304; 65 uint32_t max_queued_segs = 3072; 66 67 uint32_t max_consec_small_segs = STREAM_DEFAULT_CONSEC_SMALL_SEGS; 68 uint32_t max_consec_small_seg_size = STREAM_DEFAULT_MAX_SMALL_SEG_SIZE; 69 70 uint32_t paf_max = 16384; 71 int hs_timeout = -1; 72 73 bool no_ack; 74 }; 75 76 #endif 77 78