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Diffstat (limited to 'framework/src/suricata/src/stream-tcp-private.h')
| -rw-r--r-- | framework/src/suricata/src/stream-tcp-private.h | 246 |
1 files changed, 0 insertions, 246 deletions
diff --git a/framework/src/suricata/src/stream-tcp-private.h b/framework/src/suricata/src/stream-tcp-private.h deleted file mode 100644 index 5c03c4bc..00000000 --- a/framework/src/suricata/src/stream-tcp-private.h +++ /dev/null @@ -1,246 +0,0 @@ -/* Copyright (C) 2007-2010 Open Information Security Foundation - * - * You can copy, redistribute or modify this Program under the terms of - * the GNU General Public License version 2 as published by the Free - * Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -/** - * \file - * - * \author Victor Julien <victor@inliniac.net> - */ - -#ifndef __STREAM_TCP_PRIVATE_H__ -#define __STREAM_TCP_PRIVATE_H__ - -#include "decode.h" -#include "util-pool.h" -#include "util-pool-thread.h" - -#define STREAMTCP_QUEUE_FLAG_TS 0x01 -#define STREAMTCP_QUEUE_FLAG_WS 0x02 -#define STREAMTCP_QUEUE_FLAG_SACK 0x04 - -/** currently only SYN/ACK */ -typedef struct TcpStateQueue_ { - uint8_t flags; - uint8_t wscale; - uint16_t win; - uint32_t seq; - uint32_t ack; - uint32_t ts; - uint32_t pkt_ts; - struct TcpStateQueue_ *next; -} TcpStateQueue; - -typedef struct StreamTcpSackRecord_ { - uint32_t le; /**< left edge, host order */ - uint32_t re; /**< right edge, host order */ - struct StreamTcpSackRecord_ *next; -} StreamTcpSackRecord; - -typedef struct TcpSegment_ { - uint8_t *payload; - uint16_t payload_len; /**< actual size of the payload */ - uint16_t pool_size; /**< size of the memory */ - uint32_t seq; - struct TcpSegment_ *next; - struct TcpSegment_ *prev; - /* coccinelle: TcpSegment:flags:SEGMENTTCP_FLAG */ - uint8_t flags; -} TcpSegment; - -typedef struct TcpStream_ { - uint16_t flags:12; /**< Flag specific to the stream e.g. Timestamp */ - /* coccinelle: TcpStream:flags:STREAMTCP_STREAM_FLAG_ */ - uint16_t wscale:4; /**< wscale setting in this direction, 4 bits as max val is 15 */ - uint8_t os_policy; /**< target based OS policy used for reassembly and handling packets*/ - uint8_t tcp_flags; /**< TCP flags seen */ - - uint32_t isn; /**< initial sequence number */ - uint32_t next_seq; /**< next expected sequence number */ - uint32_t last_ack; /**< last ack'd sequence number in this stream */ - uint32_t next_win; /**< next max seq within window */ - uint32_t window; /**< current window setting, after wscale is applied */ - - uint32_t last_ts; /**< Time stamp (TSVAL) of the last seen packet for this stream*/ - uint32_t last_pkt_ts; /**< Time of last seen packet for this stream (needed for PAWS update) - This will be used to validate the last_ts, when connection has been idle for - longer time.(RFC 1323)*/ - /* reassembly */ - uint32_t ra_app_base_seq; /**< reassembled seq. We've reassembled up to this point. */ - uint32_t ra_raw_base_seq; /**< reassembled seq. We've reassembled up to this point. */ - - TcpSegment *seg_list; /**< list of TCP segments that are not yet (fully) used in reassembly */ - TcpSegment *seg_list_tail; /**< Last segment in the reassembled stream seg list*/ - - StreamTcpSackRecord *sack_head; /**< head of list of SACK records */ - StreamTcpSackRecord *sack_tail; /**< tail of list of SACK records */ -} TcpStream; - -/* from /usr/include/netinet/tcp.h */ -enum -{ - TCP_NONE, - TCP_LISTEN, - TCP_SYN_SENT, - TCP_SYN_RECV, - TCP_ESTABLISHED, - TCP_FIN_WAIT1, - TCP_FIN_WAIT2, - TCP_TIME_WAIT, - TCP_LAST_ACK, - TCP_CLOSE_WAIT, - TCP_CLOSING, - TCP_CLOSED, -}; - -/* - * Per SESSION flags - */ - -/** Flag for mid stream session */ -#define STREAMTCP_FLAG_MIDSTREAM 0x0001 -/** Flag for mid stream established session */ -#define STREAMTCP_FLAG_MIDSTREAM_ESTABLISHED 0x0002 -/** Flag for mid session when syn/ack is received */ -#define STREAMTCP_FLAG_MIDSTREAM_SYNACK 0x0004 -/** Flag for TCP Timestamp option */ -#define STREAMTCP_FLAG_TIMESTAMP 0x0008 -/** Server supports wscale (even though it can be 0) */ -#define STREAMTCP_FLAG_SERVER_WSCALE 0x0010 -/** 'Raw' reassembly is disabled for this ssn. */ -#define STREAMTCP_FLAG_DISABLE_RAW 0x0020 -/** Flag to indicate that the session is handling asynchronous stream.*/ -#define STREAMTCP_FLAG_ASYNC 0x0040 -/** Flag to indicate we're dealing with 4WHS: SYN, SYN, SYN/ACK, ACK - * (http://www.breakingpointsystems.com/community/blog/tcp-portals-the-three-way-handshake-is-a-lie) */ -#define STREAMTCP_FLAG_4WHS 0x0080 -/** Flag to indicate that this session is possible trying to evade the detection - * (http://www.packetstan.com/2010/06/recently-ive-been-on-campaign-to-make.html) */ -#define STREAMTCP_FLAG_DETECTION_EVASION_ATTEMPT 0x0100 -/** Flag to indicate the client (SYN pkt) permits SACK */ -#define STREAMTCP_FLAG_CLIENT_SACKOK 0x0200 -/** Flag to indicate both sides of the session permit SACK (SYN + SYN/ACK) */ -#define STREAMTCP_FLAG_SACKOK 0x0400 -/** Flag for triggering RAW reassembly before the size limit is reached or - the stream reaches EOF. */ -#define STREAMTCP_FLAG_TRIGGER_RAW_REASSEMBLY 0x0800 -/** 3WHS confirmed by server -- if suri sees 3whs ACK but server doesn't (pkt - * is lost on the way to server), SYN/ACK is retransmitted. If server sends - * normal packet we assume 3whs to be completed. Only used for SYN/ACK resend - * event. */ -#define STREAMTCP_FLAG_3WHS_CONFIRMED 0x1000 -/** App Layer tracking/reassembly is disabled */ -#define STREAMTCP_FLAG_APP_LAYER_DISABLED 0x2000 - -/* - * Per STREAM flags - */ - -/** stream is in a gap state */ -#define STREAMTCP_STREAM_FLAG_GAP 0x0001 -/** Flag to avoid stream reassembly/app layer inspection for the stream */ -#define STREAMTCP_STREAM_FLAG_NOREASSEMBLY 0x0002 -/** we received a keep alive */ -#define STREAMTCP_STREAM_FLAG_KEEPALIVE 0x0004 -/** Stream has reached it's reassembly depth, all further packets are ignored */ -#define STREAMTCP_STREAM_FLAG_DEPTH_REACHED 0x0008 -// vacancy -/** Stream supports TIMESTAMP -- used to set ssn STREAMTCP_FLAG_TIMESTAMP - * flag. */ -#define STREAMTCP_STREAM_FLAG_TIMESTAMP 0x0020 -/** Flag to indicate the zero value of timestamp */ -#define STREAMTCP_STREAM_FLAG_ZERO_TIMESTAMP 0x0040 -/** App proto detection completed */ -#define STREAMTCP_STREAM_FLAG_APPPROTO_DETECTION_COMPLETED 0x0080 -/** App proto detection skipped */ -#define STREAMTCP_STREAM_FLAG_APPPROTO_DETECTION_SKIPPED 0x0100 -/** Raw reassembly disabled for new segments */ -#define STREAMTCP_STREAM_FLAG_NEW_RAW_DISABLED 0x0200 -// vacancy 2x -/** NOTE: flags field is 12 bits */ - - -/* - * Per SEGMENT flags - */ -/** Flag to indicate that the current segment has been processed by the - * reassembly code and should be deleted after app layer protocol has been - * detected. */ -#define SEGMENTTCP_FLAG_RAW_PROCESSED 0x01 -/** App Layer reassembly code is done with this segment */ -#define SEGMENTTCP_FLAG_APPLAYER_PROCESSED 0x02 -/** Log API (streaming) has processed this segment */ -#define SEGMENTTCP_FLAG_LOGAPI_PROCESSED 0x04 - - -#define PAWS_24DAYS 2073600 /**< 24 days in seconds */ - -#define PKT_IS_IN_RIGHT_DIR(ssn, p) ((ssn)->flags & STREAMTCP_FLAG_MIDSTREAM_SYNACK ? \ - PKT_IS_TOSERVER(p) ? (p)->flowflags &= ~FLOW_PKT_TOSERVER \ - (p)->flowflags |= FLOW_PKT_TOCLIENT : (p)->flowflags &= ~FLOW_PKT_TOCLIENT \ - (p)->flowflags |= FLOW_PKT_TOSERVER : 0) - -/* Macro's for comparing Sequence numbers - * Page 810 from TCP/IP Illustrated, Volume 2. */ -#define SEQ_EQ(a,b) ((int32_t)((a) - (b)) == 0) -#define SEQ_LT(a,b) ((int32_t)((a) - (b)) < 0) -#define SEQ_LEQ(a,b) ((int32_t)((a) - (b)) <= 0) -#define SEQ_GT(a,b) ((int32_t)((a) - (b)) > 0) -#define SEQ_GEQ(a,b) ((int32_t)((a) - (b)) >= 0) - -#define STREAMTCP_SET_RA_BASE_SEQ(stream, seq) { \ - do { \ - (stream)->ra_raw_base_seq = (seq); \ - (stream)->ra_app_base_seq = (seq); \ - } while(0); \ -} - -#define StreamTcpSetEvent(p, e) { \ - SCLogDebug("setting event %"PRIu8" on pkt %p (%"PRIu64")", (e), p, (p)->pcap_cnt); \ - ENGINE_SET_EVENT((p), (e)); \ -} - -typedef struct TcpSession_ { - PoolThreadReserved res; - uint8_t state; - uint8_t queue_len; /**< length of queue list below */ - int8_t data_first_seen_dir; - /** track all the tcp flags we've seen */ - uint8_t tcp_packet_flags; - /* coccinelle: TcpSession:flags:STREAMTCP_FLAG */ - uint16_t flags; - TcpStream server; - TcpStream client; - struct StreamMsg_ *toserver_smsg_head; /**< list of stream msgs (for detection inspection) */ - struct StreamMsg_ *toserver_smsg_tail; /**< list of stream msgs (for detection inspection) */ - struct StreamMsg_ *toclient_smsg_head; /**< list of stream msgs (for detection inspection) */ - struct StreamMsg_ *toclient_smsg_tail; /**< list of stream msgs (for detection inspection) */ - - TcpStateQueue *queue; /**< list of SYN/ACK candidates */ -} TcpSession; - -#define StreamTcpSetStreamFlagAppProtoDetectionCompleted(stream) \ - ((stream)->flags |= STREAMTCP_STREAM_FLAG_APPPROTO_DETECTION_COMPLETED) -#define StreamTcpIsSetStreamFlagAppProtoDetectionCompleted(stream) \ - ((stream)->flags & STREAMTCP_STREAM_FLAG_APPPROTO_DETECTION_COMPLETED) -#define StreamTcpResetStreamFlagAppProtoDetectionCompleted(stream) \ - ((stream)->flags &= ~STREAMTCP_STREAM_FLAG_APPPROTO_DETECTION_COMPLETED); -#define StreamTcpDisableAppLayerReassembly(ssn) do { \ - SCLogDebug("setting STREAMTCP_FLAG_APP_LAYER_DISABLED on ssn %p", ssn); \ - ((ssn)->flags |= STREAMTCP_FLAG_APP_LAYER_DISABLED); \ - } while (0); - -#endif /* __STREAM_TCP_PRIVATE_H__ */ |