suricata
flow.h
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1 /* Copyright (C) 2007-2013 Open Information Security Foundation
2  *
3  * You can copy, redistribute or modify this Program under the terms of
4  * the GNU General Public License version 2 as published by the Free
5  * Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * version 2 along with this program; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15  * 02110-1301, USA.
16  */
17 
18 /**
19  * \file
20  *
21  * \author Victor Julien <victor@inliniac.net>
22  */
23 
24 #ifndef __FLOW_H__
25 #define __FLOW_H__
26 
27 #include "decode.h"
28 #include "util-var.h"
29 #include "util-atomic.h"
30 #include "util-device.h"
31 #include "detect-tag.h"
32 #include "util-macset.h"
33 #include "util-optimize.h"
34 
35 /* Part of the flow structure, so we declare it here.
36  * The actual declaration is in app-layer-parser.c */
38 
39 #define FLOW_QUIET TRUE
40 #define FLOW_VERBOSE FALSE
41 
42 #define TOSERVER 0
43 #define TOCLIENT 1
44 
45 /* per flow flags */
46 
47 /** At least one packet from the source address was seen */
48 #define FLOW_TO_SRC_SEEN BIT_U32(0)
49 /** At least one packet from the destination address was seen */
50 #define FLOW_TO_DST_SEEN BIT_U32(1)
51 /** Don't return this from the flow hash. It has been replaced. */
52 #define FLOW_TCP_REUSED BIT_U32(2)
53 
54 /** Flow was inspected against IP-Only sigs in the toserver direction */
55 #define FLOW_TOSERVER_IPONLY_SET BIT_U32(3)
56 /** Flow was inspected against IP-Only sigs in the toclient direction */
57 #define FLOW_TOCLIENT_IPONLY_SET BIT_U32(4)
58 
59 /** Packet belonging to this flow should not be inspected at all */
60 #define FLOW_NOPACKET_INSPECTION BIT_U32(5)
61 /** Packet payloads belonging to this flow should not be inspected */
62 #define FLOW_NOPAYLOAD_INSPECTION BIT_U32(6)
63 
64 /** All packets in this flow should be dropped */
65 #define FLOW_ACTION_DROP BIT_U32(7)
66 
67 /** Sgh for toserver direction set (even if it's NULL) */
68 #define FLOW_SGH_TOSERVER BIT_U32(8)
69 /** Sgh for toclient direction set (even if it's NULL) */
70 #define FLOW_SGH_TOCLIENT BIT_U32(9)
71 
72 /** packet to server direction has been logged in drop file (only in IPS mode) */
73 #define FLOW_TOSERVER_DROP_LOGGED BIT_U32(10)
74 /** packet to client direction has been logged in drop file (only in IPS mode) */
75 #define FLOW_TOCLIENT_DROP_LOGGED BIT_U32(11)
76 
77 /** flow has alerts */
78 #define FLOW_HAS_ALERTS BIT_U32(12)
79 
80 /** Pattern matcher alproto detection done */
81 #define FLOW_TS_PM_ALPROTO_DETECT_DONE BIT_U32(13)
82 /** Probing parser alproto detection done */
83 #define FLOW_TS_PP_ALPROTO_DETECT_DONE BIT_U32(14)
84 /** Expectation alproto detection done */
85 #define FLOW_TS_PE_ALPROTO_DETECT_DONE BIT_U32(15)
86 /** Pattern matcher alproto detection done */
87 #define FLOW_TC_PM_ALPROTO_DETECT_DONE BIT_U32(16)
88 /** Probing parser alproto detection done */
89 #define FLOW_TC_PP_ALPROTO_DETECT_DONE BIT_U32(17)
90 /** Expectation alproto detection done */
91 #define FLOW_TC_PE_ALPROTO_DETECT_DONE BIT_U32(18)
92 #define FLOW_TIMEOUT_REASSEMBLY_DONE BIT_U32(19)
93 
94 /** flow is ipv4 */
95 #define FLOW_IPV4 BIT_U32(20)
96 /** flow is ipv6 */
97 #define FLOW_IPV6 BIT_U32(21)
98 
99 #define FLOW_PROTO_DETECT_TS_DONE BIT_U32(22)
100 #define FLOW_PROTO_DETECT_TC_DONE BIT_U32(23)
101 
102 /** Indicate that alproto detection for flow should be done again */
103 #define FLOW_CHANGE_PROTO BIT_U32(24)
104 
105 #define FLOW_WRONG_THREAD BIT_U32(25)
106 /** Protocol detection told us flow is picked up in wrong direction (midstream) */
107 #define FLOW_DIR_REVERSED BIT_U32(26)
108 /** Indicate that the flow did trigger an expectation creation */
109 #define FLOW_HAS_EXPECTATION BIT_U32(27)
110 
111 /* File flags */
112 
113 #define FLOWFILE_INIT 0
114 
115 /** no magic on files in this flow */
116 #define FLOWFILE_NO_MAGIC_TS BIT_U16(0)
117 #define FLOWFILE_NO_MAGIC_TC BIT_U16(1)
118 
119 /** even if the flow has files, don't store 'm */
120 #define FLOWFILE_NO_STORE_TS BIT_U16(2)
121 #define FLOWFILE_NO_STORE_TC BIT_U16(3)
122 /** no md5 on files in this flow */
123 #define FLOWFILE_NO_MD5_TS BIT_U16(4)
124 #define FLOWFILE_NO_MD5_TC BIT_U16(5)
125 
126 /** no sha1 on files in this flow */
127 #define FLOWFILE_NO_SHA1_TS BIT_U16(6)
128 #define FLOWFILE_NO_SHA1_TC BIT_U16(7)
129 
130 /** no sha256 on files in this flow */
131 #define FLOWFILE_NO_SHA256_TS BIT_U16(8)
132 #define FLOWFILE_NO_SHA256_TC BIT_U16(9)
133 
134 /** no size tracking of files in this flow */
135 #define FLOWFILE_NO_SIZE_TS BIT_U16(10)
136 #define FLOWFILE_NO_SIZE_TC BIT_U16(11)
137 
138 #define FLOWFILE_NONE_TS (FLOWFILE_NO_MAGIC_TS | \
139  FLOWFILE_NO_STORE_TS | \
140  FLOWFILE_NO_MD5_TS | \
141  FLOWFILE_NO_SHA1_TS | \
142  FLOWFILE_NO_SHA256_TS| \
143  FLOWFILE_NO_SIZE_TS)
144 #define FLOWFILE_NONE_TC (FLOWFILE_NO_MAGIC_TC | \
145  FLOWFILE_NO_STORE_TC | \
146  FLOWFILE_NO_MD5_TC | \
147  FLOWFILE_NO_SHA1_TC | \
148  FLOWFILE_NO_SHA256_TC| \
149  FLOWFILE_NO_SIZE_TC)
150 #define FLOWFILE_NONE (FLOWFILE_NONE_TS|FLOWFILE_NONE_TC)
151 
152 #define FLOW_IS_IPV4(f) \
153  (((f)->flags & FLOW_IPV4) == FLOW_IPV4)
154 #define FLOW_IS_IPV6(f) \
155  (((f)->flags & FLOW_IPV6) == FLOW_IPV6)
156 
157 #define FLOW_GET_SP(f) \
158  ((f)->flags & FLOW_DIR_REVERSED) ? (f)->dp : (f)->sp;
159 #define FLOW_GET_DP(f) \
160  ((f)->flags & FLOW_DIR_REVERSED) ? (f)->sp : (f)->dp;
161 
162 #define FLOW_COPY_IPV4_ADDR_TO_PACKET(fa, pa) do { \
163  (pa)->family = AF_INET; \
164  (pa)->addr_data32[0] = (fa)->addr_data32[0]; \
165  } while (0)
166 
167 #define FLOW_COPY_IPV6_ADDR_TO_PACKET(fa, pa) do { \
168  (pa)->family = AF_INET6; \
169  (pa)->addr_data32[0] = (fa)->addr_data32[0]; \
170  (pa)->addr_data32[1] = (fa)->addr_data32[1]; \
171  (pa)->addr_data32[2] = (fa)->addr_data32[2]; \
172  (pa)->addr_data32[3] = (fa)->addr_data32[3]; \
173  } while (0)
174 
175 /* Set the IPv4 addressesinto the Addrs of the Packet.
176  * Make sure p->ip4h is initialized and validated.
177  *
178  * We set the rest of the struct to 0 so we can
179  * prevent using memset. */
180 #define FLOW_SET_IPV4_SRC_ADDR_FROM_PACKET(p, a) do { \
181  (a)->addr_data32[0] = (uint32_t)(p)->ip4h->s_ip_src.s_addr; \
182  (a)->addr_data32[1] = 0; \
183  (a)->addr_data32[2] = 0; \
184  (a)->addr_data32[3] = 0; \
185  } while (0)
186 
187 #define FLOW_SET_IPV4_DST_ADDR_FROM_PACKET(p, a) do { \
188  (a)->addr_data32[0] = (uint32_t)(p)->ip4h->s_ip_dst.s_addr; \
189  (a)->addr_data32[1] = 0; \
190  (a)->addr_data32[2] = 0; \
191  (a)->addr_data32[3] = 0; \
192  } while (0)
193 
194 /* clear the address structure by setting all fields to 0 */
195 #define FLOW_CLEAR_ADDR(a) do { \
196  (a)->addr_data32[0] = 0; \
197  (a)->addr_data32[1] = 0; \
198  (a)->addr_data32[2] = 0; \
199  (a)->addr_data32[3] = 0; \
200  } while (0)
201 
202 /* Set the IPv6 addressesinto the Addrs of the Packet.
203  * Make sure p->ip6h is initialized and validated. */
204 #define FLOW_SET_IPV6_SRC_ADDR_FROM_PACKET(p, a) do { \
205  (a)->addr_data32[0] = (p)->ip6h->s_ip6_src[0]; \
206  (a)->addr_data32[1] = (p)->ip6h->s_ip6_src[1]; \
207  (a)->addr_data32[2] = (p)->ip6h->s_ip6_src[2]; \
208  (a)->addr_data32[3] = (p)->ip6h->s_ip6_src[3]; \
209  } while (0)
210 
211 #define FLOW_SET_IPV6_DST_ADDR_FROM_PACKET(p, a) do { \
212  (a)->addr_data32[0] = (p)->ip6h->s_ip6_dst[0]; \
213  (a)->addr_data32[1] = (p)->ip6h->s_ip6_dst[1]; \
214  (a)->addr_data32[2] = (p)->ip6h->s_ip6_dst[2]; \
215  (a)->addr_data32[3] = (p)->ip6h->s_ip6_dst[3]; \
216  } while (0)
217 
218 /* pkt flow flags */
219 #define FLOW_PKT_TOSERVER 0x01
220 #define FLOW_PKT_TOCLIENT 0x02
221 #define FLOW_PKT_ESTABLISHED 0x04
222 #define FLOW_PKT_TOSERVER_IPONLY_SET 0x08
223 #define FLOW_PKT_TOCLIENT_IPONLY_SET 0x10
224 #define FLOW_PKT_TOSERVER_FIRST 0x20
225 #define FLOW_PKT_TOCLIENT_FIRST 0x40
226 /** last pseudo packet in the flow. Can be used to trigger final clean,
227  * logging, etc. */
228 #define FLOW_PKT_LAST_PSEUDO 0x80
229 
230 #define FLOW_END_FLAG_STATE_NEW 0x01
231 #define FLOW_END_FLAG_STATE_ESTABLISHED 0x02
232 #define FLOW_END_FLAG_STATE_CLOSED 0x04
233 #define FLOW_END_FLAG_EMERGENCY 0x08
234 #define FLOW_END_FLAG_TIMEOUT 0x10
235 #define FLOW_END_FLAG_FORCED 0x20
236 #define FLOW_END_FLAG_SHUTDOWN 0x40
237 #define FLOW_END_FLAG_STATE_BYPASSED 0x80
238 
239 /** Mutex or RWLocks for the flow. */
240 //#define FLOWLOCK_RWLOCK
241 #define FLOWLOCK_MUTEX
242 
243 #ifdef FLOWLOCK_RWLOCK
244  #ifdef FLOWLOCK_MUTEX
245  #error Cannot enable both FLOWLOCK_RWLOCK and FLOWLOCK_MUTEX
246  #endif
247 #endif
248 
249 #ifdef FLOWLOCK_RWLOCK
250  #define FLOWLOCK_INIT(fb) SCRWLockInit(&(fb)->r, NULL)
251  #define FLOWLOCK_DESTROY(fb) SCRWLockDestroy(&(fb)->r)
252  #define FLOWLOCK_RDLOCK(fb) SCRWLockRDLock(&(fb)->r)
253  #define FLOWLOCK_WRLOCK(fb) SCRWLockWRLock(&(fb)->r)
254  #define FLOWLOCK_TRYRDLOCK(fb) SCRWLockTryRDLock(&(fb)->r)
255  #define FLOWLOCK_TRYWRLOCK(fb) SCRWLockTryWRLock(&(fb)->r)
256  #define FLOWLOCK_UNLOCK(fb) SCRWLockUnlock(&(fb)->r)
257 #elif defined FLOWLOCK_MUTEX
258  #define FLOWLOCK_INIT(fb) SCMutexInit(&(fb)->m, NULL)
259  #define FLOWLOCK_DESTROY(fb) SCMutexDestroy(&(fb)->m)
260  #define FLOWLOCK_RDLOCK(fb) SCMutexLock(&(fb)->m)
261  #define FLOWLOCK_WRLOCK(fb) SCMutexLock(&(fb)->m)
262  #define FLOWLOCK_TRYRDLOCK(fb) SCMutexTrylock(&(fb)->m)
263  #define FLOWLOCK_TRYWRLOCK(fb) SCMutexTrylock(&(fb)->m)
264  #define FLOWLOCK_UNLOCK(fb) SCMutexUnlock(&(fb)->m)
265 #else
266  #error Enable FLOWLOCK_RWLOCK or FLOWLOCK_MUTEX
267 #endif
268 
269 #define FLOW_IS_PM_DONE(f, dir) (((dir) & STREAM_TOSERVER) ? ((f)->flags & FLOW_TS_PM_ALPROTO_DETECT_DONE) : ((f)->flags & FLOW_TC_PM_ALPROTO_DETECT_DONE))
270 #define FLOW_IS_PP_DONE(f, dir) (((dir) & STREAM_TOSERVER) ? ((f)->flags & FLOW_TS_PP_ALPROTO_DETECT_DONE) : ((f)->flags & FLOW_TC_PP_ALPROTO_DETECT_DONE))
271 #define FLOW_IS_PE_DONE(f, dir) (((dir) & STREAM_TOSERVER) ? ((f)->flags & FLOW_TS_PE_ALPROTO_DETECT_DONE) : ((f)->flags & FLOW_TC_PE_ALPROTO_DETECT_DONE))
272 
273 #define FLOW_SET_PM_DONE(f, dir) (((dir) & STREAM_TOSERVER) ? ((f)->flags |= FLOW_TS_PM_ALPROTO_DETECT_DONE) : ((f)->flags |= FLOW_TC_PM_ALPROTO_DETECT_DONE))
274 #define FLOW_SET_PP_DONE(f, dir) (((dir) & STREAM_TOSERVER) ? ((f)->flags |= FLOW_TS_PP_ALPROTO_DETECT_DONE) : ((f)->flags |= FLOW_TC_PP_ALPROTO_DETECT_DONE))
275 #define FLOW_SET_PE_DONE(f, dir) (((dir) & STREAM_TOSERVER) ? ((f)->flags |= FLOW_TS_PE_ALPROTO_DETECT_DONE) : ((f)->flags |= FLOW_TC_PE_ALPROTO_DETECT_DONE))
276 
277 #define FLOW_RESET_PM_DONE(f, dir) (((dir) & STREAM_TOSERVER) ? ((f)->flags &= ~FLOW_TS_PM_ALPROTO_DETECT_DONE) : ((f)->flags &= ~FLOW_TC_PM_ALPROTO_DETECT_DONE))
278 #define FLOW_RESET_PP_DONE(f, dir) (((dir) & STREAM_TOSERVER) ? ((f)->flags &= ~FLOW_TS_PP_ALPROTO_DETECT_DONE) : ((f)->flags &= ~FLOW_TC_PP_ALPROTO_DETECT_DONE))
279 #define FLOW_RESET_PE_DONE(f, dir) (((dir) & STREAM_TOSERVER) ? ((f)->flags &= ~FLOW_TS_PE_ALPROTO_DETECT_DONE) : ((f)->flags &= ~FLOW_TC_PE_ALPROTO_DETECT_DONE))
280 
281 /* global flow config */
282 typedef struct FlowCnf_
283 {
284  uint32_t hash_rand;
285  uint32_t hash_size;
286  uint32_t max_flows;
287  uint32_t prealloc;
288 
289  uint32_t timeout_new;
290  uint32_t timeout_est;
291 
295 
296  SC_ATOMIC_DECLARE(uint64_t, memcap);
298 
299 /* Hash key for the flow hash */
300 typedef struct FlowKey_
301 {
304  uint8_t proto;
306  uint16_t vlan_id[2];
308 
309 typedef struct FlowAddress_ {
310  union {
311  uint32_t address_un_data32[4]; /* type-specific field */
312  uint16_t address_un_data16[8]; /* type-specific field */
313  uint8_t address_un_data8[16]; /* type-specific field */
316 
317 #define addr_data32 address.address_un_data32
318 #define addr_data16 address.address_un_data16
319 #define addr_data8 address.address_un_data8
320 
321 typedef unsigned short FlowRefCount;
322 
323 typedef unsigned short FlowStateType;
324 
325 /** Local Thread ID */
326 typedef uint16_t FlowThreadId;
327 
328 /**
329  * \brief Flow data structure.
330  *
331  * The flow is a global data structure that is created for new packets of a
332  * flow and then looked up for the following packets of a flow.
333  *
334  * Locking
335  *
336  * The flow is updated/used by multiple packets at the same time. This is why
337  * there is a flow-mutex. It's a mutex and not a spinlock because some
338  * operations on the flow can be quite expensive, thus spinning would be
339  * too expensive.
340  *
341  * The flow "header" (addresses, ports, proto, recursion level) are static
342  * after the initialization and remain read-only throughout the entire live
343  * of a flow. This is why we can access those without protection of the lock.
344  */
345 
346 typedef struct Flow_
347 {
348  /* flow "header", used for hashing and flow lookup. Static after init,
349  * so safe to look at without lock */
351  union {
352  Port sp; /**< tcp/udp source port */
353  struct {
354  uint8_t type; /**< icmp type */
355  uint8_t code; /**< icmp code */
357  };
358  union {
359  Port dp; /**< tcp/udp destination port */
360  struct {
361  uint8_t type; /**< icmp type */
362  uint8_t code; /**< icmp code */
364  };
365  uint8_t proto;
367  uint16_t vlan_id[2];
368  /** how many references exist to this flow *right now*
369  *
370  * On receiving a packet the counter is incremented while the flow
371  * bucked is locked, which is also the case on timeout pruning.
372  */
374 
375  uint8_t vlan_idx;
376 
377  /* track toserver/toclient flow timeout needs */
378  union {
379  struct {
380  uint8_t ffr_ts:4;
381  uint8_t ffr_tc:4;
382  };
383  uint8_t ffr;
384  };
385 
386  /** timestamp in seconds of the moment this flow will timeout
387  * according to the timeout policy. Does *not* take emergency
388  * mode into account. */
389  uint32_t timeout_at;
390 
391  /** Thread ID for the stream/detect portion of this flow */
393 
394  struct Flow_ *next; /* (hash) list next */
395  /** Incoming interface */
397 
398  /** flow hash - the flow hash before hash table size mod. */
399  uint32_t flow_hash;
400 
401  /* time stamp of last update (last packet). Set/updated under the
402  * flow and flow hash row locks, safe to read under either the
403  * flow lock or flow hash row lock. */
404  struct timeval lastts;
405 
406  /* end of flow "header" */
407 
408  /** timeout policy value in seconds to add to the lastts.tv_sec
409  * when a packet has been received. */
410  uint32_t timeout_policy;
411 
413 
414  /** flow tenant id, used to setup flow timeout and stream pseudo
415  * packets with the correct tenant id set */
416  uint32_t tenant_id;
417 
420 
421  uint32_t flags; /**< generic flags */
422 
423  uint16_t file_flags; /**< file tracking/extraction flags */
424 
425  /** destination port to be used in protocol detection. This is meant
426  * for use with STARTTLS and HTTP CONNECT detection */
427  uint16_t protodetect_dp; /**< 0 if not used */
428 
429  /* Parent flow id for protocol like ftp */
430  int64_t parent_id;
431 
432 #ifdef FLOWLOCK_RWLOCK
433  SCRWLock r;
434 #elif defined FLOWLOCK_MUTEX
436 #else
437  #error Enable FLOWLOCK_RWLOCK or FLOWLOCK_MUTEX
438 #endif
439 
440  /** protocol specific data pointer, e.g. for TcpSession */
441  void *protoctx;
442 
443  /** mapping to Flow's protocol specific protocols for timeouts
444  and state and free functions. */
445  uint8_t protomap;
446 
447  uint8_t flow_end_flags;
448  /* coccinelle: Flow:flow_end_flags:FLOW_END_FLAG_ */
449 
450  AppProto alproto; /**< \brief application level protocol */
453 
454  /** original application level protocol. Used to indicate the previous
455  protocol when changing to another protocol , e.g. with STARTTLS. */
457  /** expected app protocol: used in protocol change/upgrade like in
458  * STARTTLS. */
460 
461  /** detection engine ctx version used to inspect this flow. Set at initial
462  * inspection. If it doesn't match the currently in use de_ctx, the
463  * stored sgh ptrs are reset. */
464  uint32_t de_ctx_version;
465 
466  /** ttl tracking */
471 
472  /** application level storage ptrs.
473  *
474  */
475  AppLayerParserState *alparser; /**< parser internal state */
476  void *alstate; /**< application layer state */
477 
478  /** toclient sgh for this flow. Only use when FLOW_SGH_TOCLIENT flow flag
479  * has been set. */
481  /** toserver sgh for this flow. Only use when FLOW_SGH_TOSERVER flow flag
482  * has been set. */
484 
485  /* pointer to the var list */
487 
488  struct FlowBucket_ *fb;
489 
490  struct timeval startts;
491 
492  uint32_t todstpktcnt;
493  uint32_t tosrcpktcnt;
494  uint64_t todstbytecnt;
495  uint64_t tosrcbytecnt;
497 
498 enum FlowState {
503 #ifdef CAPTURE_OFFLOAD
504  FLOW_STATE_CAPTURE_BYPASSED,
505 #endif
506 };
507 
508 typedef struct FlowProtoTimeout_ {
509  uint32_t new_timeout;
510  uint32_t est_timeout;
511  uint32_t closed_timeout;
514 
515 typedef struct FlowProtoFreeFunc_ {
516  void (*Freefunc)(void *);
518 
519 typedef struct FlowBypassInfo_ {
520  bool (* BypassUpdate)(Flow *f, void *data, time_t tsec);
521  void (* BypassFree)(void *data);
522  void *bypass_data;
523  uint64_t tosrcpktcnt;
524  uint64_t tosrcbytecnt;
525  uint64_t todstpktcnt;
526  uint64_t todstbytecnt;
528 
529 #include "flow-queue.h"
530 
531 typedef struct FlowLookupStruct_ // TODO name
532 {
533  /** thread store of spare queues */
539 
540 /** \brief prepare packet for a life with flow
541  * Set PKT_WANTS_FLOW flag to incidate workers should do a flow lookup
542  * and calc the hash value to be used in the lookup and autofp flow
543  * balancing. */
544 void FlowSetupPacket(Packet *p);
546 void FlowInitConfig (char);
547 void FlowPrintQueueInfo (void);
548 void FlowShutdown(void);
549 void FlowSetIPOnlyFlag(Flow *, int);
550 void FlowSetHasAlertsFlag(Flow *);
551 int FlowHasAlerts(const Flow *);
554 int FlowChangeProto(Flow *);
555 void FlowSwap(Flow *);
556 
557 void FlowRegisterTests (void);
558 int FlowSetProtoTimeout(uint8_t ,uint32_t ,uint32_t ,uint32_t);
559 int FlowSetProtoEmergencyTimeout(uint8_t ,uint32_t ,uint32_t ,uint32_t);
560 int FlowSetProtoFreeFunc (uint8_t , void (*Free)(void *));
562 
564 
565 static inline void FlowSetNoPacketInspectionFlag(Flow *);
566 static inline void FlowSetNoPayloadInspectionFlag(Flow *);
567 
568 int FlowGetPacketDirection(const Flow *, const Packet *);
569 
570 void FlowCleanupAppLayer(Flow *);
571 
572 void FlowUpdateState(Flow *f, enum FlowState s);
573 
574 int FlowSetMemcap(uint64_t size);
575 uint64_t FlowGetMemcap(void);
576 uint64_t FlowGetMemuse(void);
577 
578 int GetFlowBypassInfoID(void);
579 void RegisterFlowBypassInfo(void);
580 
581 void FlowGetLastTimeAsParts(Flow *flow, uint64_t *secs, uint64_t *usecs);
582 
583 /** ----- Inline functions ----- */
584 
585 /** \brief Set the No Packet Inspection Flag without locking the flow.
586  *
587  * \param f Flow to set the flag in
588  */
589 static inline void FlowSetNoPacketInspectionFlag(Flow *f)
590 {
591  SCEnter();
592 
593  SCLogDebug("flow %p", f);
595 
596  SCReturn;
597 }
598 
599 /** \brief Set the No payload inspection Flag without locking the flow.
600  *
601  * \param f Flow to set the flag in
602  */
603 static inline void FlowSetNoPayloadInspectionFlag(Flow *f)
604 {
605  SCEnter();
606 
607  SCLogDebug("flow %p", f);
609 
610  SCReturn;
611 }
612 
613 /**
614  * \brief increase the use count of a flow
615  *
616  * \param f flow to decrease use count for
617  */
618 static inline void FlowIncrUsecnt(Flow *f)
619 {
620  if (f == NULL)
621  return;
622 
623  f->use_cnt++;
624 }
625 
626 /**
627  * \brief decrease the use count of a flow
628  *
629  * \param f flow to decrease use count for
630  */
631 static inline void FlowDecrUsecnt(Flow *f)
632 {
633  if (f == NULL)
634  return;
635 
636  f->use_cnt--;
637 }
638 
639 /** \brief Reference the flow, bumping the flows use_cnt
640  * \note This should only be called once for a destination
641  * pointer */
642 static inline void FlowReference(Flow **d, Flow *f)
643 {
644  if (likely(f != NULL)) {
645 #ifdef DEBUG_VALIDATION
646  BUG_ON(*d == f);
647 #else
648  if (*d == f)
649  return;
650 #endif
651  FlowIncrUsecnt(f);
652  *d = f;
653  }
654 }
655 
656 static inline void FlowDeReference(Flow **d)
657 {
658  if (likely(*d != NULL)) {
659  FlowDecrUsecnt(*d);
660  *d = NULL;
661  }
662 }
663 
664 /** \brief create a flow id that is as unique as possible
665  * \retval flow_id signed 64bit id
666  * \note signed because of the signedness of json_integer_t in
667  * the json output
668  */
669 static inline int64_t FlowGetId(const Flow *f)
670 {
671  int64_t id = (int64_t)f->flow_hash << 31 |
672  (int64_t)(f->startts.tv_sec & 0x0000FFFF) << 16 |
673  (int64_t)(f->startts.tv_usec & 0x0000FFFF);
674  /* reduce to 51 bits as Javascript and even JSON often seem to
675  * max out there. */
676  id &= 0x7ffffffffffffLL;
677  return id;
678 }
679 
680 static inline void FlowSetEndFlags(Flow *f)
681 {
682  const int state = f->flow_state;
683  if (state == FLOW_STATE_NEW)
685  else if (state == FLOW_STATE_ESTABLISHED)
687  else if (state == FLOW_STATE_CLOSED)
689  else if (state == FLOW_STATE_LOCAL_BYPASSED)
691 #ifdef CAPTURE_OFFLOAD
692  else if (state == FLOW_STATE_CAPTURE_BYPASSED)
694 #endif
695 }
696 
697 int FlowClearMemory(Flow *,uint8_t );
698 
700 void *FlowGetAppState(const Flow *f);
701 uint8_t FlowGetDisruptionFlags(const Flow *f, uint8_t flags);
702 
704 
705 #endif /* __FLOW_H__ */
Flow_::icmp_d
struct Flow_::@122::@127 icmp_d
Flow_::ffr_tc
uint8_t ffr_tc
Definition: flow.h:381
FlowLookupStruct_::work_queue
FlowQueuePrivate work_queue
Definition: flow.h:536
FlowSetMemcap
int FlowSetMemcap(uint64_t size)
Update memcap value.
Definition: flow.c:115
FlowGetDisruptionFlags
uint8_t FlowGetDisruptionFlags(const Flow *f, uint8_t flags)
get 'disruption' flags: GAP/DEPTH/PASS
Definition: flow.c:1114
FlowBucket_
Definition: flow-hash.h:41
Flow_::ffr_ts
uint8_t ffr_ts
Definition: flow.h:380
Flow_::recursion_level
uint8_t recursion_level
Definition: flow.h:366
FlowSetProtoEmergencyTimeout
int FlowSetProtoEmergencyTimeout(uint8_t, uint32_t, uint32_t, uint32_t)
FlowAddress_
Definition: flow.h:309
FLOW_STATE_ESTABLISHED
@ FLOW_STATE_ESTABLISHED
Definition: flow.h:500
FlowLookupStruct_::dtv
DecodeThreadVars * dtv
Definition: flow.h:535
Flow_::startts
struct timeval startts
Definition: flow.h:490
SigGroupHead_
Container for matching data for a signature group.
Definition: detect.h:1347
FlowKey_::src
Address src
Definition: flow.h:302
FLOW_END_FLAG_STATE_NEW
#define FLOW_END_FLAG_STATE_NEW
Definition: flow.h:230
FlowBypassInfo_
Definition: flow.h:519
FlowCnf_::emergency_recovery
uint32_t emergency_recovery
Definition: flow.h:294
FlowCnf_::hash_size
uint32_t hash_size
Definition: flow.h:285
FlowHandlePacket
void FlowHandlePacket(ThreadVars *, FlowLookupStruct *, Packet *)
Entry point for packet flow handling.
Definition: flow.c:500
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uint32_t address_un_data32[4]
Definition: flow.h:311
SCLogDebug
#define SCLogDebug(...)
Definition: util-debug.h:298
FlowUpdateSpareFlows
int FlowUpdateSpareFlows(void)
FlowLookupStruct
struct FlowLookupStruct_ FlowLookupStruct
Flow_::proto
uint8_t proto
Definition: flow.h:365
AppProto
uint16_t AppProto
Definition: app-layer-protos.h:73
FlowGetPacketDirection
int FlowGetPacketDirection(const Flow *, const Packet *)
determine the direction of the packet compared to the flow
Definition: flow.c:292
FlowClearMemory
int FlowClearMemory(Flow *, uint8_t)
Function clear the flow memory before queueing it to spare flow queue.
Definition: flow.c:1060
util-macset.h
Flow_
Flow data structure.
Definition: flow.h:347
Flow_::protomap
uint8_t protomap
Definition: flow.h:445
LiveDevice_
Definition: util-device.h:40
FlowProtoTimeout_
Definition: flow.h:508
FLOW_END_FLAG_STATE_ESTABLISHED
#define FLOW_END_FLAG_STATE_ESTABLISHED
Definition: flow.h:231
FlowInitConfig
void FlowInitConfig(char)
initialize the configuration
Definition: flow.c:516
FLOW_NOPAYLOAD_INSPECTION
#define FLOW_NOPAYLOAD_INSPECTION
Definition: flow.h:62
FlowLookupStruct_
Definition: flow.h:532
Flow_::alproto_orig
AppProto alproto_orig
Definition: flow.h:456
Flow_::vlan_id
uint16_t vlan_id[2]
Definition: flow.h:367
Flow
struct Flow_ Flow
Flow data structure.
FLOW_END_FLAG_STATE_BYPASSED
#define FLOW_END_FLAG_STATE_BYPASSED
Definition: flow.h:237
Flow_::use_cnt
FlowRefCount use_cnt
Definition: flow.h:373
FlowProtoTimeout_::bypassed_timeout
uint32_t bypassed_timeout
Definition: flow.h:512
FlowBypassInfo_::tosrcbytecnt
uint64_t tosrcbytecnt
Definition: flow.h:524
FlowCnf_::emerg_timeout_new
uint32_t emerg_timeout_new
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Address_
Definition: decode.h:116
FlowSetupPacket
void FlowSetupPacket(Packet *p)
prepare packet for a life with flow Set PKT_WANTS_FLOW flag to incidate workers should do a flow look...
Definition: flow-hash.c:410
Flow_::max_ttl_toserver
uint8_t max_ttl_toserver
Definition: flow.h:468
Flow_::dp
Port dp
Definition: flow.h:359
FlowGetAppState
void * FlowGetAppState(const Flow *f)
Definition: flow.c:1102
detect-tag.h
Flow_::protoctx
void * protoctx
Definition: flow.h:441
FlowUnsetChangeProtoFlag
void FlowUnsetChangeProtoFlag(Flow *)
Unset flag to indicate to change proto for the flow.
Definition: flow.c:202
util-var.h
GetFlowBypassInfoID
int GetFlowBypassInfoID(void)
Definition: flow-util.c:218
FlowCnf_::prealloc
uint32_t prealloc
Definition: flow.h:287
Flow_::flow_state
FlowStateType flow_state
Definition: flow.h:412
Flow_::sgh_toserver
const struct SigGroupHead_ * sgh_toserver
Definition: flow.h:483
FlowLookupStruct_::emerg_spare_sync_stamp
uint32_t emerg_spare_sync_stamp
Definition: flow.h:537
Flow_::tosrcbytecnt
uint64_t tosrcbytecnt
Definition: flow.h:495
FlowConfig
struct FlowCnf_ FlowConfig
Flow_::alparser
AppLayerParserState * alparser
Definition: flow.h:475
Flow_::dst
FlowAddress dst
Definition: flow.h:350
FlowProtoFreeFunc
struct FlowProtoFreeFunc_ FlowProtoFreeFunc
Flow_::fb
struct FlowBucket_ * fb
Definition: flow.h:488
FLOW_STATE_LOCAL_BYPASSED
@ FLOW_STATE_LOCAL_BYPASSED
Definition: flow.h:502
Flow_::min_ttl_toserver
uint8_t min_ttl_toserver
Definition: flow.h:467
Flow_::protodetect_dp
uint16_t protodetect_dp
Definition: flow.h:427
decode.h
util-device.h
FlowBypassInfo_::todstbytecnt
uint64_t todstbytecnt
Definition: flow.h:526
AppLayerParserState_
Definition: app-layer-parser.c:154
RegisterFlowBypassInfo
void RegisterFlowBypassInfo(void)
Definition: flow-util.c:236
FlowBypassInfo_::BypassUpdate
bool(* BypassUpdate)(Flow *f, void *data, time_t tsec)
Definition: flow.h:520
FlowBypassInfo_::BypassFree
void(* BypassFree)(void *data)
Definition: flow.h:521
Flow_::todstpktcnt
uint32_t todstpktcnt
Definition: flow.h:492
FlowSetProtoTimeout
int FlowSetProtoTimeout(uint8_t, uint32_t, uint32_t, uint32_t)
FlowSetIPOnlyFlag
void FlowSetIPOnlyFlag(Flow *, int)
Set the IPOnly scanned flag for 'direction'.
Definition: flow.c:158
FlowSwap
void FlowSwap(Flow *)
swap the flow's direction
Definition: flow.c:261
FlowKey_::recursion_level
uint8_t recursion_level
Definition: flow.h:305
SCEnter
#define SCEnter(...)
Definition: util-debug.h:300
ThreadVars_
Per thread variable structure.
Definition: threadvars.h:58
FlowShutdown
void FlowShutdown(void)
shutdown the flow engine
Definition: flow.c:644
FlowGetMemuse
uint64_t FlowGetMemuse(void)
Definition: flow.c:136
Flow_::flow_end_flags
uint8_t flow_end_flags
Definition: flow.h:447
FlowCnf_
Definition: flow.h:283
FlowState
FlowState
Definition: flow.h:498
FlowBypassInfo_::todstpktcnt
uint64_t todstpktcnt
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FlowProtoTimeout_::new_timeout
uint32_t new_timeout
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FlowProtoTimeout_::closed_timeout
uint32_t closed_timeout
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FlowBypassInfo_::bypass_data
void * bypass_data
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Flow_::m
SCMutex m
Definition: flow.h:435
FlowBypassInfo
struct FlowBypassInfo_ FlowBypassInfo
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uint32_t timeout_new
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Flow_::todstbytecnt
uint64_t todstbytecnt
Definition: flow.h:494
FlowGetLastTimeAsParts
void FlowGetLastTimeAsParts(Flow *flow, uint64_t *secs, uint64_t *usecs)
Get flow last time as individual values.
Definition: flow.c:1171
BUG_ON
#define BUG_ON(x)
Definition: suricata-common.h:282
Flow_::sgh_toclient
const struct SigGroupHead_ * sgh_toclient
Definition: flow.h:480
FlowPrintQueueInfo
void FlowPrintQueueInfo(void)
FlowChangeProto
int FlowChangeProto(Flow *)
Check if change proto flag is set for flow.
Definition: flow.c:212
FlowThreadId
uint16_t FlowThreadId
Definition: flow.h:326
FlowKey_::sp
Port sp
Definition: flow.h:303
SCReturn
#define SCReturn
Definition: util-debug.h:302
Packet_
Definition: decode.h:414
Flow_::type
uint8_t type
Definition: flow.h:354
FlowRegisterTests
void FlowRegisterTests(void)
Function to register the Flow Unitests.
Definition: flow.c:1390
Port
uint16_t Port
Definition: decode.h:241
FlowKey_::vlan_id
uint16_t vlan_id[2]
Definition: flow.h:306
FlowProtoFreeFunc_::Freefunc
void(* Freefunc)(void *)
Definition: flow.h:516
FlowAddress_::address_un_data16
uint16_t address_un_data16[8]
Definition: flow.h:312
FlowCnf_::hash_rand
uint32_t hash_rand
Definition: flow.h:284
Flow_::vlan_idx
uint8_t vlan_idx
Definition: flow.h:375
FlowHandlePacketUpdate
void FlowHandlePacketUpdate(Flow *f, Packet *p, ThreadVars *tv, DecodeThreadVars *dtv)
Update Packet and Flow.
Definition: flow.c:389
Flow_::min_ttl_toclient
uint8_t min_ttl_toclient
Definition: flow.h:469
flow-queue.h
FlowCleanupAppLayer
void FlowCleanupAppLayer(Flow *)
Definition: flow.c:142
FlowBypassInfo_::tosrcpktcnt
uint64_t tosrcpktcnt
Definition: flow.h:523
Flow_::probing_parser_toclient_alproto_masks
uint32_t probing_parser_toclient_alproto_masks
Definition: flow.h:419
FlowAddress_::address
union FlowAddress_::@119 address
FlowCnf_::SC_ATOMIC_DECLARE
SC_ATOMIC_DECLARE(uint64_t, memcap)
Flow_::flow_hash
uint32_t flow_hash
Definition: flow.h:399
Flow_::alproto_expect
AppProto alproto_expect
Definition: flow.h:459
Flow_::src
FlowAddress src
Definition: flow.h:350
Flow_::flowvar
GenericVar * flowvar
Definition: flow.h:486
Flow_::next
struct Flow_ * next
Definition: flow.h:394
Flow_::probing_parser_toserver_alproto_masks
uint32_t probing_parser_toserver_alproto_masks
Definition: flow.h:418
dtv
DecodeThreadVars * dtv
Definition: fuzz_decodepcapfile.c:30
Flow_::lastts
struct timeval lastts
Definition: flow.h:404
FlowLookupStruct_::spare_queue
FlowQueuePrivate spare_queue
Definition: flow.h:534
FlowProtoTimeout
struct FlowProtoTimeout_ FlowProtoTimeout
Flow_::ffr
uint8_t ffr
Definition: flow.h:383
FlowCnf_::emerg_timeout_est
uint32_t emerg_timeout_est
Definition: flow.h:293
FlowStateType
unsigned short FlowStateType
Definition: flow.h:323
flags
uint8_t flags
Definition: decode-gre.h:0
FLOW_STATE_NEW
@ FLOW_STATE_NEW
Definition: flow.h:499
Flow_::code
uint8_t code
Definition: flow.h:355
GenericVar_
Definition: util-var.h:48
FlowAddress
struct FlowAddress_ FlowAddress
FlowKey_::dst
Address dst
Definition: flow.h:302
FlowCnf_::max_flows
uint32_t max_flows
Definition: flow.h:286
Flow_::max_ttl_toclient
uint8_t max_ttl_toclient
Definition: flow.h:470
Flow_::parent_id
int64_t parent_id
Definition: flow.h:430
FLOW_END_FLAG_STATE_CLOSED
#define FLOW_END_FLAG_STATE_CLOSED
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FlowCnf_::timeout_est
uint32_t timeout_est
Definition: flow.h:290
Flow_::timeout_policy
uint32_t timeout_policy
Definition: flow.h:410
tv
ThreadVars * tv
Definition: fuzz_decodepcapfile.c:29
Flow_::livedev
struct LiveDevice_ * livedev
Definition: flow.h:396
util-optimize.h
FlowQueuePrivate_
Definition: flow-queue.h:41
FlowAddress_::address_un_data8
uint8_t address_un_data8[16]
Definition: flow.h:313
FlowKey_::proto
uint8_t proto
Definition: flow.h:304
FLOW_STATE_CLOSED
@ FLOW_STATE_CLOSED
Definition: flow.h:501
DecodeThreadVars_
Structure to hold thread specific data for all decode modules.
Definition: decode.h:631
Flow_::alproto_ts
AppProto alproto_ts
Definition: flow.h:451
Flow_::alstate
void * alstate
Definition: flow.h:476
Flow_::flags
uint32_t flags
Definition: flow.h:421
FlowGetAppProtocol
AppProto FlowGetAppProtocol(const Flow *f)
Definition: flow.c:1097
SCRWLock
#define SCRWLock
Definition: threads-debug.h:363
FlowGetMemcap
uint64_t FlowGetMemcap(void)
Return memcap value.
Definition: flow.c:130
FlowKey_
Definition: flow.h:301
likely
#define likely(expr)
Definition: util-optimize.h:32
FLOW_NOPACKET_INSPECTION
#define FLOW_NOPACKET_INSPECTION
Definition: flow.h:60
FlowProtoTimeout_::est_timeout
uint32_t est_timeout
Definition: flow.h:510
Flow_::sp
Port sp
Definition: flow.h:352
FlowRefCount
unsigned short FlowRefCount
Definition: flow.h:321
Flow_::alproto_tc
AppProto alproto_tc
Definition: flow.h:452
FlowSetChangeProtoFlag
void FlowSetChangeProtoFlag(Flow *)
Set flag to indicate to change proto for the flow.
Definition: flow.c:193
Flow_::file_flags
uint16_t file_flags
Definition: flow.h:423
Flow_::alproto
AppProto alproto
application level protocol
Definition: flow.h:450
FlowUpdateState
void FlowUpdateState(Flow *f, enum FlowState s)
Definition: flow.c:1138
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struct Flow_::@120::@126 icmp_s
Flow_::timeout_at
uint32_t timeout_at
Definition: flow.h:389
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Port dp
Definition: flow.h:303
FlowUpdateQueue
void FlowUpdateQueue(Flow *)
FlowKey
struct FlowKey_ FlowKey
SCMutex
#define SCMutex
Definition: threads-debug.h:114
FlowSetProtoFreeFunc
int FlowSetProtoFreeFunc(uint8_t, void(*Free)(void *))
Function to set the function to get protocol specific flow state.
Definition: flow.c:1088
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uint32_t tenant_id
Definition: flow.h:416
Flow_::tosrcpktcnt
uint32_t tosrcpktcnt
Definition: flow.h:493
FlowSetHasAlertsFlag
void FlowSetHasAlertsFlag(Flow *)
Set flag to indicate that flow has alerts.
Definition: flow.c:169
Flow_::thread_id
FlowThreadId thread_id[2]
Definition: flow.h:392
FlowHasAlerts
int FlowHasAlerts(const Flow *)
Check if flow has alerts.
Definition: flow.c:180
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Definition: flow.h:515
Flow_::de_ctx_version
uint32_t de_ctx_version
Definition: flow.h:464