204 lines
7.1 KiB
C
204 lines
7.1 KiB
C
/*
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* Copyright (c) 2001 Daniel Hartmeier
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $OpenBSD: pfvar.h,v 1.282 2009/01/29 15:12:28 pyr Exp $
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* $FreeBSD$
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*/
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#ifndef _NET_PF_H_
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#define _NET_PF_H_
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#define PF_TCPS_PROXY_SRC ((TCP_NSTATES)+0)
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#define PF_TCPS_PROXY_DST ((TCP_NSTATES)+1)
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#define PF_MD5_DIGEST_LENGTH 16
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#ifdef MD5_DIGEST_LENGTH
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#if PF_MD5_DIGEST_LENGTH != MD5_DIGEST_LENGTH
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#error
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#endif
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#endif
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enum { PF_INOUT, PF_IN, PF_OUT, PF_FWD };
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enum { PF_PASS, PF_DROP, PF_SCRUB, PF_NOSCRUB, PF_NAT, PF_NONAT,
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PF_BINAT, PF_NOBINAT, PF_RDR, PF_NORDR, PF_SYNPROXY_DROP, PF_DEFER };
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enum { PF_RULESET_SCRUB, PF_RULESET_FILTER, PF_RULESET_NAT,
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PF_RULESET_BINAT, PF_RULESET_RDR, PF_RULESET_MAX };
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enum { PF_OP_NONE, PF_OP_IRG, PF_OP_EQ, PF_OP_NE, PF_OP_LT,
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PF_OP_LE, PF_OP_GT, PF_OP_GE, PF_OP_XRG, PF_OP_RRG };
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enum { PF_DEBUG_NONE, PF_DEBUG_URGENT, PF_DEBUG_MISC, PF_DEBUG_NOISY };
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enum { PF_CHANGE_NONE, PF_CHANGE_ADD_HEAD, PF_CHANGE_ADD_TAIL,
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PF_CHANGE_ADD_BEFORE, PF_CHANGE_ADD_AFTER,
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PF_CHANGE_REMOVE, PF_CHANGE_GET_TICKET };
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enum { PF_GET_NONE, PF_GET_CLR_CNTR };
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enum { PF_SK_WIRE, PF_SK_STACK, PF_SK_BOTH };
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/*
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* Note about PFTM_*: real indices into pf_rule.timeout[] come before
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* PFTM_MAX, special cases afterwards. See pf_state_expires().
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*/
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enum { PFTM_TCP_FIRST_PACKET, PFTM_TCP_OPENING, PFTM_TCP_ESTABLISHED,
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PFTM_TCP_CLOSING, PFTM_TCP_FIN_WAIT, PFTM_TCP_CLOSED,
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PFTM_UDP_FIRST_PACKET, PFTM_UDP_SINGLE, PFTM_UDP_MULTIPLE,
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PFTM_ICMP_FIRST_PACKET, PFTM_ICMP_ERROR_REPLY,
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PFTM_OTHER_FIRST_PACKET, PFTM_OTHER_SINGLE,
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PFTM_OTHER_MULTIPLE, PFTM_FRAG, PFTM_INTERVAL,
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PFTM_ADAPTIVE_START, PFTM_ADAPTIVE_END, PFTM_SRC_NODE,
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PFTM_TS_DIFF, PFTM_MAX, PFTM_PURGE, PFTM_UNLINKED };
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/* PFTM default values */
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#define PFTM_TCP_FIRST_PACKET_VAL 120 /* First TCP packet */
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#define PFTM_TCP_OPENING_VAL 30 /* No response yet */
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#define PFTM_TCP_ESTABLISHED_VAL 24*60*60/* Established */
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#define PFTM_TCP_CLOSING_VAL 15 * 60 /* Half closed */
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#define PFTM_TCP_FIN_WAIT_VAL 45 /* Got both FINs */
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#define PFTM_TCP_CLOSED_VAL 90 /* Got a RST */
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#define PFTM_UDP_FIRST_PACKET_VAL 60 /* First UDP packet */
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#define PFTM_UDP_SINGLE_VAL 30 /* Unidirectional */
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#define PFTM_UDP_MULTIPLE_VAL 60 /* Bidirectional */
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#define PFTM_ICMP_FIRST_PACKET_VAL 20 /* First ICMP packet */
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#define PFTM_ICMP_ERROR_REPLY_VAL 10 /* Got error response */
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#define PFTM_OTHER_FIRST_PACKET_VAL 60 /* First packet */
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#define PFTM_OTHER_SINGLE_VAL 30 /* Unidirectional */
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#define PFTM_OTHER_MULTIPLE_VAL 60 /* Bidirectional */
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#define PFTM_FRAG_VAL 30 /* Fragment expire */
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#define PFTM_INTERVAL_VAL 10 /* Expire interval */
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#define PFTM_SRC_NODE_VAL 0 /* Source tracking */
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#define PFTM_TS_DIFF_VAL 30 /* Allowed TS diff */
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enum { PF_NOPFROUTE, PF_FASTROUTE, PF_ROUTETO, PF_DUPTO, PF_REPLYTO };
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enum { PF_LIMIT_STATES, PF_LIMIT_SRC_NODES, PF_LIMIT_FRAGS,
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PF_LIMIT_TABLE_ENTRIES, PF_LIMIT_MAX };
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#define PF_POOL_IDMASK 0x0f
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enum { PF_POOL_NONE, PF_POOL_BITMASK, PF_POOL_RANDOM,
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PF_POOL_SRCHASH, PF_POOL_ROUNDROBIN };
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enum { PF_ADDR_ADDRMASK, PF_ADDR_NOROUTE, PF_ADDR_DYNIFTL,
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PF_ADDR_TABLE, PF_ADDR_URPFFAILED,
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PF_ADDR_RANGE };
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#define PF_POOL_TYPEMASK 0x0f
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#define PF_POOL_STICKYADDR 0x20
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#define PF_WSCALE_FLAG 0x80
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#define PF_WSCALE_MASK 0x0f
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#define PF_LOG 0x01
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#define PF_LOG_ALL 0x02
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#define PF_LOG_SOCKET_LOOKUP 0x04
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/* Reasons code for passing/dropping a packet */
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#define PFRES_MATCH 0 /* Explicit match of a rule */
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#define PFRES_BADOFF 1 /* Bad offset for pull_hdr */
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#define PFRES_FRAG 2 /* Dropping following fragment */
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#define PFRES_SHORT 3 /* Dropping short packet */
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#define PFRES_NORM 4 /* Dropping by normalizer */
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#define PFRES_MEMORY 5 /* Dropped due to lacking mem */
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#define PFRES_TS 6 /* Bad TCP Timestamp (RFC1323) */
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#define PFRES_CONGEST 7 /* Congestion (of ipintrq) */
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#define PFRES_IPOPTIONS 8 /* IP option */
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#define PFRES_PROTCKSUM 9 /* Protocol checksum invalid */
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#define PFRES_BADSTATE 10 /* State mismatch */
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#define PFRES_STATEINS 11 /* State insertion failure */
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#define PFRES_MAXSTATES 12 /* State limit */
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#define PFRES_SRCLIMIT 13 /* Source node/conn limit */
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#define PFRES_SYNPROXY 14 /* SYN proxy */
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#define PFRES_MAPFAILED 15 /* pf_map_addr() failed */
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#define PFRES_MAX 16 /* total+1 */
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#define PFRES_NAMES { \
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"match", \
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"bad-offset", \
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"fragment", \
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"short", \
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"normalize", \
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"memory", \
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"bad-timestamp", \
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"congestion", \
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"ip-option", \
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"proto-cksum", \
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"state-mismatch", \
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"state-insert", \
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"state-limit", \
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"src-limit", \
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"synproxy", \
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"map-failed", \
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NULL \
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}
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/* Counters for other things we want to keep track of */
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#define LCNT_STATES 0 /* states */
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#define LCNT_SRCSTATES 1 /* max-src-states */
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#define LCNT_SRCNODES 2 /* max-src-nodes */
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#define LCNT_SRCCONN 3 /* max-src-conn */
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#define LCNT_SRCCONNRATE 4 /* max-src-conn-rate */
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#define LCNT_OVERLOAD_TABLE 5 /* entry added to overload table */
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#define LCNT_OVERLOAD_FLUSH 6 /* state entries flushed */
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#define LCNT_MAX 7 /* total+1 */
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#define LCNT_NAMES { \
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"max states per rule", \
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"max-src-states", \
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"max-src-nodes", \
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"max-src-conn", \
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"max-src-conn-rate", \
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"overload table insertion", \
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"overload flush states", \
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NULL \
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}
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/* state operation counters */
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#define FCNT_STATE_SEARCH 0
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#define FCNT_STATE_INSERT 1
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#define FCNT_STATE_REMOVALS 2
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#define FCNT_MAX 3
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/* src_node operation counters */
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#define SCNT_SRC_NODE_SEARCH 0
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#define SCNT_SRC_NODE_INSERT 1
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#define SCNT_SRC_NODE_REMOVALS 2
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#define SCNT_MAX 3
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#define PF_TABLE_NAME_SIZE 32
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#define PF_QNAME_SIZE 64
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struct pf_status {
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uint64_t counters[PFRES_MAX];
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uint64_t lcounters[LCNT_MAX];
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uint64_t fcounters[FCNT_MAX];
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uint64_t scounters[SCNT_MAX];
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uint64_t pcounters[2][2][3];
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uint64_t bcounters[2][2];
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uint32_t running;
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uint32_t states;
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uint32_t src_nodes;
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uint32_t since;
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uint32_t debug;
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uint32_t hostid;
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char ifname[IFNAMSIZ];
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uint8_t pf_chksum[PF_MD5_DIGEST_LENGTH];
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};
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#endif /* _NET_PF_H_ */
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