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Diffstat (limited to 'src/flow-util.h')
| -rw-r--r-- | src/flow-util.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/flow-util.h b/src/flow-util.h new file mode 100644 index 0000000..3d0d978 --- /dev/null +++ b/src/flow-util.h @@ -0,0 +1,168 @@ +/* Copyright (C) 2007-2012 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 __FLOW_UTIL_H__ +#define __FLOW_UTIL_H__ + +#include "flow.h" +#include "stream-tcp-private.h" + +#define RESET_COUNTERS(f) \ + do { \ + (f)->todstpktcnt = 0; \ + (f)->tosrcpktcnt = 0; \ + (f)->todstbytecnt = 0; \ + (f)->tosrcbytecnt = 0; \ + } while (0) + +#define FLOW_INITIALIZE(f) \ + do { \ + (f)->sp = 0; \ + (f)->dp = 0; \ + (f)->proto = 0; \ + (f)->livedev = NULL; \ + (f)->timeout_at = 0; \ + (f)->timeout_policy = 0; \ + (f)->vlan_idx = 0; \ + (f)->next = NULL; \ + (f)->flow_state = 0; \ + (f)->tenant_id = 0; \ + (f)->parent_id = 0; \ + (f)->probing_parser_toserver_alproto_masks = 0; \ + (f)->probing_parser_toclient_alproto_masks = 0; \ + (f)->flags = 0; \ + (f)->file_flags = 0; \ + (f)->protodetect_dp = 0; \ + SCTIME_INIT((f)->lastts); \ + FLOWLOCK_INIT((f)); \ + (f)->protoctx = NULL; \ + (f)->flow_end_flags = 0; \ + (f)->alproto = 0; \ + (f)->alproto_ts = 0; \ + (f)->alproto_tc = 0; \ + (f)->alproto_orig = 0; \ + (f)->alproto_expect = 0; \ + (f)->de_ctx_version = 0; \ + (f)->thread_id[0] = 0; \ + (f)->thread_id[1] = 0; \ + (f)->alparser = NULL; \ + (f)->alstate = NULL; \ + (f)->sgh_toserver = NULL; \ + (f)->sgh_toclient = NULL; \ + (f)->flowvar = NULL; \ + RESET_COUNTERS((f)); \ + } while (0) + +/** \brief macro to recycle a flow before it goes into the spare queue for reuse. + * + * Note that the lnext, lprev, hnext fields are untouched, those are + * managed by the queueing code. Same goes for fb (FlowBucket ptr) field. + */ +#define FLOW_RECYCLE(f) \ + do { \ + FlowCleanupAppLayer((f)); \ + (f)->sp = 0; \ + (f)->dp = 0; \ + (f)->proto = 0; \ + (f)->livedev = NULL; \ + (f)->vlan_idx = 0; \ + (f)->ffr = 0; \ + (f)->next = NULL; \ + (f)->timeout_at = 0; \ + (f)->timeout_policy = 0; \ + (f)->flow_state = 0; \ + (f)->tenant_id = 0; \ + (f)->parent_id = 0; \ + (f)->probing_parser_toserver_alproto_masks = 0; \ + (f)->probing_parser_toclient_alproto_masks = 0; \ + (f)->flags = 0; \ + (f)->file_flags = 0; \ + (f)->protodetect_dp = 0; \ + SCTIME_INIT((f)->lastts); \ + (f)->protoctx = NULL; \ + (f)->flow_end_flags = 0; \ + (f)->alparser = NULL; \ + (f)->alstate = NULL; \ + (f)->alproto = 0; \ + (f)->alproto_ts = 0; \ + (f)->alproto_tc = 0; \ + (f)->alproto_orig = 0; \ + (f)->alproto_expect = 0; \ + (f)->de_ctx_version = 0; \ + (f)->thread_id[0] = 0; \ + (f)->thread_id[1] = 0; \ + (f)->sgh_toserver = NULL; \ + (f)->sgh_toclient = NULL; \ + GenericVarFree((f)->flowvar); \ + (f)->flowvar = NULL; \ + RESET_COUNTERS((f)); \ + } while (0) + +#define FLOW_DESTROY(f) \ + do { \ + FlowCleanupAppLayer((f)); \ + \ + FLOWLOCK_DESTROY((f)); \ + GenericVarFree((f)->flowvar); \ + } while (0) + +/** \brief check if a memory alloc would fit in the memcap + * + * \param size memory allocation size to check + * + * \retval 1 it fits + * \retval 0 no fit + */ +#define FLOW_CHECK_MEMCAP(size) \ + ((((uint64_t)SC_ATOMIC_GET(flow_memuse) + (uint64_t)(size)) <= \ + SC_ATOMIC_GET(flow_config.memcap))) + +Flow *FlowAlloc(void); +void FlowFree(Flow *); +uint8_t FlowGetProtoMapping(uint8_t); +void FlowInit(Flow *, const Packet *); +uint8_t FlowGetReverseProtoMapping(uint8_t rproto); + +/* flow end counter logic */ + +typedef struct FlowEndCounters_ { + uint16_t flow_state[FLOW_STATE_SIZE]; + uint16_t flow_tcp_state[TCP_CLOSED + 1]; + uint16_t flow_tcp_liberal; +} FlowEndCounters; + +static inline void FlowEndCountersUpdate(ThreadVars *tv, FlowEndCounters *fec, Flow *f) +{ + if (f->proto == IPPROTO_TCP && f->protoctx != NULL) { + TcpSession *ssn = f->protoctx; + StatsIncr(tv, fec->flow_tcp_state[ssn->state]); + if (ssn->flags & STREAMTCP_FLAG_LOSSY_BE_LIBERAL) { + StatsIncr(tv, fec->flow_tcp_liberal); + } + } + StatsIncr(tv, fec->flow_state[f->flow_state]); +} + +void FlowEndCountersRegister(ThreadVars *t, FlowEndCounters *fec); + +#endif /* __FLOW_UTIL_H__ */ |