262 lines
7.2 KiB
C
262 lines
7.2 KiB
C
/* $NetBSD$ */
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/*
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* Copyright (C) 1995-2001 by Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*
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* @(#)ip_state.h 1.3 1/12/96 (C) 1995 Darren Reed
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* Id: ip_state.h,v 2.68.2.3 2005/03/03 14:24:11 darrenr Exp
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*/
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#ifndef __IP_STATE_H__
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#define __IP_STATE_H__
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#if defined(__STDC__) || defined(__GNUC__)
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# define SIOCDELST _IOW('r', 61, struct ipfobj)
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#else
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# define SIOCDELST _IOW(r, 61, struct ipfobj)
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#endif
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struct ipscan;
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#ifndef IPSTATE_SIZE
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# define IPSTATE_SIZE 5737
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#endif
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#ifndef IPSTATE_MAX
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# define IPSTATE_MAX 4013 /* Maximum number of states held */
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#endif
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#define PAIRS(s1,d1,s2,d2) ((((s1) == (s2)) && ((d1) == (d2))) ||\
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(((s1) == (d2)) && ((d1) == (s2))))
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#define IPPAIR(s1,d1,s2,d2) PAIRS((s1).s_addr, (d1).s_addr, \
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(s2).s_addr, (d2).s_addr)
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typedef struct ipstate {
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ipfmutex_t is_lock;
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struct ipstate *is_next;
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struct ipstate **is_pnext;
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struct ipstate *is_hnext;
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struct ipstate **is_phnext;
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struct ipstate **is_me;
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void *is_ifp[4];
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void *is_sync;
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struct nat *is_nat[2];
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frentry_t *is_rule;
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struct ipftq *is_tqehead[2];
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struct ipscan *is_isc;
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U_QUAD_T is_pkts[4];
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U_QUAD_T is_bytes[4];
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U_QUAD_T is_icmppkts[4];
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struct ipftqent is_sti;
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u_int is_frage[2];
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int is_ref; /* reference count */
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int is_isninc[2];
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u_short is_sumd[2];
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i6addr_t is_src;
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i6addr_t is_dst;
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u_int is_pass;
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u_char is_p; /* Protocol */
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u_char is_v;
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u_32_t is_hv;
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u_32_t is_tag;
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u_32_t is_opt; /* packet options set */
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u_32_t is_optmsk; /* " " mask */
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u_short is_sec; /* security options set */
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u_short is_secmsk; /* " " mask */
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u_short is_auth; /* authentication options set */
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u_short is_authmsk; /* " " mask */
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union {
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icmpinfo_t is_ics;
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tcpinfo_t is_ts;
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udpinfo_t is_us;
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greinfo_t is_ug;
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} is_ps;
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u_32_t is_flags;
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int is_flx[2][2];
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u_32_t is_rulen; /* rule number when created */
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u_32_t is_s0[2];
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u_short is_smsk[2];
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char is_group[FR_GROUPLEN];
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char is_sbuf[2][16];
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char is_ifname[4][LIFNAMSIZ];
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} ipstate_t;
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#define is_die is_sti.tqe_die
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#define is_state is_sti.tqe_state
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#define is_touched is_sti.tqe_touched
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#define is_saddr is_src.in4.s_addr
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#define is_daddr is_dst.in4.s_addr
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#define is_icmp is_ps.is_ics
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#define is_type is_icmp.ici_type
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#define is_code is_icmp.ici_code
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#define is_tcp is_ps.is_ts
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#define is_udp is_ps.is_us
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#define is_send is_tcp.ts_data[0].td_end
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#define is_dend is_tcp.ts_data[1].td_end
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#define is_maxswin is_tcp.ts_data[0].td_maxwin
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#define is_maxdwin is_tcp.ts_data[1].td_maxwin
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#define is_maxsend is_tcp.ts_data[0].td_maxend
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#define is_maxdend is_tcp.ts_data[1].td_maxend
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#define is_swinscale is_tcp.ts_data[0].td_winscale
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#define is_dwinscale is_tcp.ts_data[1].td_winscale
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#define is_swinflags is_tcp.ts_data[0].td_winflags
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#define is_dwinflags is_tcp.ts_data[1].td_winflags
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#define is_sport is_tcp.ts_sport
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#define is_dport is_tcp.ts_dport
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#define is_ifpin is_ifp[0]
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#define is_ifpout is_ifp[2]
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#define is_gre is_ps.is_ug
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#define is_call is_gre.gs_call
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#define IS_WSPORT SI_W_SPORT /* 0x00100 */
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#define IS_WDPORT SI_W_DPORT /* 0x00200 */
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#define IS_WSADDR SI_W_SADDR /* 0x00400 */
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#define IS_WDADDR SI_W_DADDR /* 0x00800 */
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#define IS_NEWFR SI_NEWFR /* 0x01000 */
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#define IS_CLONE SI_CLONE /* 0x02000 */
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#define IS_CLONED SI_CLONED /* 0x04000 */
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#define IS_TCPFSM 0x10000
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#define IS_STRICT 0x20000
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#define IS_ISNSYN 0x40000
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#define IS_ISNACK 0x80000
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#define IS_STATESYNC 0x100000
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/*
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* IS_SC flags are for scan-operations that need to be recognised in state.
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*/
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#define IS_SC_CLIENT 0x10000000
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#define IS_SC_SERVER 0x20000000
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#define IS_SC_MATCHC 0x40000000
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#define IS_SC_MATCHS 0x80000000
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#define IS_SC_MATCHALL (IS_SC_MATCHC|IS_SC_MATCHC)
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#define IS_SC_ALL (IS_SC_MATCHC|IS_SC_MATCHC|IS_SC_CLIENT|IS_SC_SERVER)
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/*
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* Flags that can be passed into fr_addstate
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*/
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#define IS_INHERITED 0x0fffff00
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#define TH_OPENING (TH_SYN|TH_ACK)
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/*
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* is_flags:
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* Bits 0 - 3 are use as a mask with the current packet's bits to check for
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* whether it is short, tcp/udp, a fragment or the presence of IP options.
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* Bits 4 - 7 are set from the initial packet and contain what the packet
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* anded with bits 0-3 must match.
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* Bits 8,9 are used to indicate wildcard source/destination port matching.
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* Bits 10,11 are reserved for other wildcard flag compatibility.
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* Bits 12,13 are for scaning.
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*/
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typedef struct ipstate_save {
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void *ips_next;
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struct ipstate ips_is;
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struct frentry ips_fr;
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} ipstate_save_t;
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#define ips_rule ips_is.is_rule
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typedef struct ipslog {
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U_QUAD_T isl_pkts[4];
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U_QUAD_T isl_bytes[4];
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i6addr_t isl_src;
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i6addr_t isl_dst;
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u_32_t isl_tag;
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u_short isl_type;
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union {
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u_short isl_filler[2];
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u_short isl_ports[2];
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u_short isl_icmp;
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} isl_ps;
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u_char isl_v;
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u_char isl_p;
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u_char isl_flags;
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u_char isl_state[2];
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u_32_t isl_rulen;
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char isl_group[FR_GROUPLEN];
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} ipslog_t;
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#define isl_sport isl_ps.isl_ports[0]
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#define isl_dport isl_ps.isl_ports[1]
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#define isl_itype isl_ps.isl_icmp
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#define ISL_NEW 0
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#define ISL_CLONE 1
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#define ISL_EXPIRE 0xffff
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#define ISL_FLUSH 0xfffe
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#define ISL_REMOVE 0xfffd
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#define ISL_INTERMEDIATE 0xfffc
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#define ISL_KILLED 0xfffb
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#define ISL_ORPHAN 0xfffa
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typedef struct ips_stat {
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u_long iss_hits;
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u_long iss_miss;
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u_long iss_max;
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u_long iss_maxref;
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u_long iss_tcp;
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u_long iss_udp;
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u_long iss_icmp;
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u_long iss_nomem;
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u_long iss_expire;
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u_long iss_fin;
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u_long iss_active;
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u_long iss_logged;
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u_long iss_logfail;
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u_long iss_inuse;
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u_long iss_wild;
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u_long iss_killed;
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u_long iss_ticks;
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u_long iss_bucketfull;
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int iss_statesize;
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int iss_statemax;
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ipstate_t **iss_table;
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ipstate_t *iss_list;
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u_long *iss_bucketlen;
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} ips_stat_t;
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extern u_long fr_tcpidletimeout;
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extern u_long fr_tcpclosewait;
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extern u_long fr_tcplastack;
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extern u_long fr_tcptimeout;
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extern u_long fr_tcpclosed;
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extern u_long fr_tcphalfclosed;
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extern u_long fr_udptimeout;
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extern u_long fr_udpacktimeout;
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extern u_long fr_icmptimeout;
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extern u_long fr_icmpacktimeout;
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extern u_long fr_iptimeout;
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extern int fr_statemax;
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extern int fr_statesize;
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extern int fr_state_lock;
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extern int fr_state_maxbucket;
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extern int fr_state_maxbucket_reset;
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extern ipstate_t *ips_list;
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extern ipftq_t *ips_utqe;
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extern ipftq_t ips_tqtqb[IPF_TCP_NSTATES];
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extern int fr_stateinit __P((void));
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extern ipstate_t *fr_addstate __P((fr_info_t *, ipstate_t **, u_int));
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extern frentry_t *fr_checkstate __P((struct fr_info *, u_32_t *));
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extern ipstate_t *fr_stlookup __P((fr_info_t *, tcphdr_t *, ipftq_t **));
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extern void fr_statesync __P((void *));
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extern void fr_timeoutstate __P((void));
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extern int fr_tcp_age __P((struct ipftqent *, struct fr_info *,
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struct ipftq *, int));
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extern int fr_tcpinwindow __P((struct fr_info *, struct tcpdata *,
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struct tcpdata *, tcphdr_t *, int));
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extern void fr_stateunload __P((void));
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extern void ipstate_log __P((struct ipstate *, u_int));
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extern int fr_state_ioctl __P((caddr_t, ioctlcmd_t, int));
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extern void fr_stinsert __P((struct ipstate *, int));
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extern void fr_sttab_init __P((struct ipftq *));
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extern void fr_sttab_destroy __P((struct ipftq *));
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extern void fr_updatestate __P((fr_info_t *, ipstate_t *, ipftq_t *));
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extern void fr_statederef __P((fr_info_t *, ipstate_t **));
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extern void fr_setstatequeue __P((ipstate_t *, int));
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#endif /* __IP_STATE_H__ */
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