1145522Sdarrenr/* $FreeBSD$ */ 2145522Sdarrenr 353642Sguido/* 480482Sdarrenr * Copyright (C) 1995-2001 by Darren Reed. 553642Sguido * 680482Sdarrenr * See the IPFILTER.LICENCE file for details on licencing. 753642Sguido * 853642Sguido * @(#)ip_state.h 1.3 1/12/96 (C) 1995 Darren Reed 957126Sguido * $FreeBSD$ 10172776Sdarrenr * Id: ip_state.h,v 2.68.2.10 2007/10/16 09:33:24 darrenr Exp $ 1153642Sguido */ 1253642Sguido#ifndef __IP_STATE_H__ 1353642Sguido#define __IP_STATE_H__ 1453642Sguido 15153876Sguido#if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 16145522Sdarrenr# define SIOCDELST _IOW('r', 61, struct ipfobj) 1760854Sdarrenr#else 18145522Sdarrenr# define SIOCDELST _IOW(r, 61, struct ipfobj) 1960854Sdarrenr#endif 2060854Sdarrenr 21145522Sdarrenrstruct ipscan; 22145522Sdarrenr 2380482Sdarrenr#ifndef IPSTATE_SIZE 2480482Sdarrenr# define IPSTATE_SIZE 5737 2580482Sdarrenr#endif 2680482Sdarrenr#ifndef IPSTATE_MAX 2780482Sdarrenr# define IPSTATE_MAX 4013 /* Maximum number of states held */ 2880482Sdarrenr#endif 2953642Sguido 30172776Sdarrenr#define SEQ_GE(a,b) ((int)((a) - (b)) >= 0) 31172776Sdarrenr#define SEQ_GT(a,b) ((int)((a) - (b)) > 0) 3253642Sguido 3353642Sguido 3453642Sguidotypedef struct ipstate { 35145522Sdarrenr ipfmutex_t is_lock; 3653642Sguido struct ipstate *is_next; 3760854Sdarrenr struct ipstate **is_pnext; 3860854Sdarrenr struct ipstate *is_hnext; 3960854Sdarrenr struct ipstate **is_phnext; 4092685Sdarrenr struct ipstate **is_me; 41145522Sdarrenr void *is_ifp[4]; 42145522Sdarrenr void *is_sync; 4395418Sdarrenr frentry_t *is_rule; 44145522Sdarrenr struct ipftq *is_tqehead[2]; 45145522Sdarrenr struct ipscan *is_isc; 46145522Sdarrenr U_QUAD_T is_pkts[4]; 47145522Sdarrenr U_QUAD_T is_bytes[4]; 48145522Sdarrenr U_QUAD_T is_icmppkts[4]; 49145522Sdarrenr struct ipftqent is_sti; 50145522Sdarrenr u_int is_frage[2]; 51145522Sdarrenr int is_ref; /* reference count */ 52145522Sdarrenr int is_isninc[2]; 53145522Sdarrenr u_short is_sumd[2]; 54145522Sdarrenr i6addr_t is_src; 55145522Sdarrenr i6addr_t is_dst; 5695418Sdarrenr u_int is_pass; 5753642Sguido u_char is_p; /* Protocol */ 58145522Sdarrenr u_char is_v; 59145522Sdarrenr u_32_t is_hv; 60145522Sdarrenr u_32_t is_tag; 61153876Sguido u_32_t is_opt[2]; /* packet options set */ 62153876Sguido u_32_t is_optmsk[2]; /* " " mask */ 6353642Sguido u_short is_sec; /* security options set */ 6453642Sguido u_short is_secmsk; /* " " mask */ 6553642Sguido u_short is_auth; /* authentication options set */ 6653642Sguido u_short is_authmsk; /* " " mask */ 6753642Sguido union { 68145522Sdarrenr icmpinfo_t is_ics; 69145522Sdarrenr tcpinfo_t is_ts; 70145522Sdarrenr udpinfo_t is_us; 71145522Sdarrenr greinfo_t is_ug; 7253642Sguido } is_ps; 73145522Sdarrenr u_32_t is_flags; 74145522Sdarrenr int is_flx[2][2]; 75145522Sdarrenr u_32_t is_rulen; /* rule number when created */ 76145522Sdarrenr u_32_t is_s0[2]; 77145522Sdarrenr u_short is_smsk[2]; 78145522Sdarrenr char is_group[FR_GROUPLEN]; 79145522Sdarrenr char is_sbuf[2][16]; 80145522Sdarrenr char is_ifname[4][LIFNAMSIZ]; 8153642Sguido} ipstate_t; 8253642Sguido 83145522Sdarrenr#define is_die is_sti.tqe_die 84145522Sdarrenr#define is_state is_sti.tqe_state 85145522Sdarrenr#define is_touched is_sti.tqe_touched 8660854Sdarrenr#define is_saddr is_src.in4.s_addr 8760854Sdarrenr#define is_daddr is_dst.in4.s_addr 8860854Sdarrenr#define is_icmp is_ps.is_ics 89145522Sdarrenr#define is_type is_icmp.ici_type 90145522Sdarrenr#define is_code is_icmp.ici_code 9160854Sdarrenr#define is_tcp is_ps.is_ts 9260854Sdarrenr#define is_udp is_ps.is_us 9360854Sdarrenr#define is_send is_tcp.ts_data[0].td_end 9460854Sdarrenr#define is_dend is_tcp.ts_data[1].td_end 9553642Sguido#define is_maxswin is_tcp.ts_data[0].td_maxwin 9653642Sguido#define is_maxdwin is_tcp.ts_data[1].td_maxwin 9753642Sguido#define is_maxsend is_tcp.ts_data[0].td_maxend 9853642Sguido#define is_maxdend is_tcp.ts_data[1].td_maxend 99145522Sdarrenr#define is_swinscale is_tcp.ts_data[0].td_winscale 100145522Sdarrenr#define is_dwinscale is_tcp.ts_data[1].td_winscale 101145522Sdarrenr#define is_swinflags is_tcp.ts_data[0].td_winflags 102145522Sdarrenr#define is_dwinflags is_tcp.ts_data[1].td_winflags 10353642Sguido#define is_sport is_tcp.ts_sport 10453642Sguido#define is_dport is_tcp.ts_dport 10560854Sdarrenr#define is_ifpin is_ifp[0] 10692685Sdarrenr#define is_ifpout is_ifp[2] 107145522Sdarrenr#define is_gre is_ps.is_ug 108145522Sdarrenr#define is_call is_gre.gs_call 10953642Sguido 110145522Sdarrenr#define IS_WSPORT SI_W_SPORT /* 0x00100 */ 111145522Sdarrenr#define IS_WDPORT SI_W_DPORT /* 0x00200 */ 112145522Sdarrenr#define IS_WSADDR SI_W_SADDR /* 0x00400 */ 113145522Sdarrenr#define IS_WDADDR SI_W_DADDR /* 0x00800 */ 114145522Sdarrenr#define IS_NEWFR SI_NEWFR /* 0x01000 */ 115145522Sdarrenr#define IS_CLONE SI_CLONE /* 0x02000 */ 116145522Sdarrenr#define IS_CLONED SI_CLONED /* 0x04000 */ 117145522Sdarrenr#define IS_TCPFSM 0x10000 118145522Sdarrenr#define IS_STRICT 0x20000 119145522Sdarrenr#define IS_ISNSYN 0x40000 120145522Sdarrenr#define IS_ISNACK 0x80000 121145522Sdarrenr#define IS_STATESYNC 0x100000 122145522Sdarrenr/* 123145522Sdarrenr * IS_SC flags are for scan-operations that need to be recognised in state. 124145522Sdarrenr */ 125145522Sdarrenr#define IS_SC_CLIENT 0x10000000 126145522Sdarrenr#define IS_SC_SERVER 0x20000000 127145522Sdarrenr#define IS_SC_MATCHC 0x40000000 128145522Sdarrenr#define IS_SC_MATCHS 0x80000000 129145522Sdarrenr#define IS_SC_MATCHALL (IS_SC_MATCHC|IS_SC_MATCHC) 130145522Sdarrenr#define IS_SC_ALL (IS_SC_MATCHC|IS_SC_MATCHC|IS_SC_CLIENT|IS_SC_SERVER) 131145522Sdarrenr 132145522Sdarrenr/* 133145522Sdarrenr * Flags that can be passed into fr_addstate 134145522Sdarrenr */ 135145522Sdarrenr#define IS_INHERITED 0x0fffff00 136145522Sdarrenr 13753642Sguido#define TH_OPENING (TH_SYN|TH_ACK) 13853642Sguido/* 13953642Sguido * is_flags: 14053642Sguido * Bits 0 - 3 are use as a mask with the current packet's bits to check for 14153642Sguido * whether it is short, tcp/udp, a fragment or the presence of IP options. 14253642Sguido * Bits 4 - 7 are set from the initial packet and contain what the packet 14353642Sguido * anded with bits 0-3 must match. 14453642Sguido * Bits 8,9 are used to indicate wildcard source/destination port matching. 145145522Sdarrenr * Bits 10,11 are reserved for other wildcard flag compatibility. 146145522Sdarrenr * Bits 12,13 are for scaning. 14753642Sguido */ 14853642Sguido 14960854Sdarrenrtypedef struct ipstate_save { 15060854Sdarrenr void *ips_next; 15160854Sdarrenr struct ipstate ips_is; 15260854Sdarrenr struct frentry ips_fr; 15360854Sdarrenr} ipstate_save_t; 15453642Sguido 15560854Sdarrenr#define ips_rule ips_is.is_rule 15660854Sdarrenr 15760854Sdarrenr 15853642Sguidotypedef struct ipslog { 159145522Sdarrenr U_QUAD_T isl_pkts[4]; 160145522Sdarrenr U_QUAD_T isl_bytes[4]; 161145522Sdarrenr i6addr_t isl_src; 162145522Sdarrenr i6addr_t isl_dst; 163145522Sdarrenr u_32_t isl_tag; 16453642Sguido u_short isl_type; 16553642Sguido union { 16653642Sguido u_short isl_filler[2]; 16753642Sguido u_short isl_ports[2]; 16853642Sguido u_short isl_icmp; 16953642Sguido } isl_ps; 17060854Sdarrenr u_char isl_v; 17160854Sdarrenr u_char isl_p; 17260854Sdarrenr u_char isl_flags; 17360854Sdarrenr u_char isl_state[2]; 174102520Sdarrenr u_32_t isl_rulen; 175145522Sdarrenr char isl_group[FR_GROUPLEN]; 17653642Sguido} ipslog_t; 17753642Sguido 17853642Sguido#define isl_sport isl_ps.isl_ports[0] 17953642Sguido#define isl_dport isl_ps.isl_ports[1] 18053642Sguido#define isl_itype isl_ps.isl_icmp 18153642Sguido 182145522Sdarrenr#define ISL_NEW 0 183145522Sdarrenr#define ISL_CLONE 1 184145522Sdarrenr#define ISL_EXPIRE 0xffff 185145522Sdarrenr#define ISL_FLUSH 0xfffe 186145522Sdarrenr#define ISL_REMOVE 0xfffd 187145522Sdarrenr#define ISL_INTERMEDIATE 0xfffc 188145522Sdarrenr#define ISL_KILLED 0xfffb 189145522Sdarrenr#define ISL_ORPHAN 0xfffa 190170268Sdarrenr#define ISL_UNLOAD 0xfff9 19153642Sguido 19253642Sguido 19353642Sguidotypedef struct ips_stat { 19453642Sguido u_long iss_hits; 19553642Sguido u_long iss_miss; 19653642Sguido u_long iss_max; 197145522Sdarrenr u_long iss_maxref; 19853642Sguido u_long iss_tcp; 19953642Sguido u_long iss_udp; 20053642Sguido u_long iss_icmp; 20153642Sguido u_long iss_nomem; 20253642Sguido u_long iss_expire; 20353642Sguido u_long iss_fin; 20453642Sguido u_long iss_active; 20553642Sguido u_long iss_logged; 20653642Sguido u_long iss_logfail; 20753642Sguido u_long iss_inuse; 208145522Sdarrenr u_long iss_wild; 209145522Sdarrenr u_long iss_killed; 210145522Sdarrenr u_long iss_ticks; 211145522Sdarrenr u_long iss_bucketfull; 212145522Sdarrenr int iss_statesize; 213145522Sdarrenr int iss_statemax; 21453642Sguido ipstate_t **iss_table; 21560854Sdarrenr ipstate_t *iss_list; 216145522Sdarrenr u_long *iss_bucketlen; 217170268Sdarrenr ipftq_t *iss_tcptab; 21853642Sguido} ips_stat_t; 21953642Sguido 22053642Sguido 22153642Sguidoextern u_long fr_tcpidletimeout; 22253642Sguidoextern u_long fr_tcpclosewait; 22353642Sguidoextern u_long fr_tcplastack; 22453642Sguidoextern u_long fr_tcptimeout; 22553642Sguidoextern u_long fr_tcpclosed; 22667614Sdarrenrextern u_long fr_tcphalfclosed; 22753642Sguidoextern u_long fr_udptimeout; 22892685Sdarrenrextern u_long fr_udpacktimeout; 22953642Sguidoextern u_long fr_icmptimeout; 23092685Sdarrenrextern u_long fr_icmpacktimeout; 231145522Sdarrenrextern u_long fr_iptimeout; 232145522Sdarrenrextern int fr_statemax; 233145522Sdarrenrextern int fr_statesize; 234145522Sdarrenrextern int fr_state_lock; 235145522Sdarrenrextern int fr_state_maxbucket; 236145522Sdarrenrextern int fr_state_maxbucket_reset; 23792685Sdarrenrextern ipstate_t *ips_list; 238145522Sdarrenrextern ipftq_t *ips_utqe; 239145522Sdarrenrextern ipftq_t ips_tqtqb[IPF_TCP_NSTATES]; 240145522Sdarrenr 24153642Sguidoextern int fr_stateinit __P((void)); 242145522Sdarrenrextern ipstate_t *fr_addstate __P((fr_info_t *, ipstate_t **, u_int)); 243145522Sdarrenrextern frentry_t *fr_checkstate __P((struct fr_info *, u_32_t *)); 244145522Sdarrenrextern ipstate_t *fr_stlookup __P((fr_info_t *, tcphdr_t *, ipftq_t **)); 245145522Sdarrenrextern void fr_statesync __P((void *)); 24653642Sguidoextern void fr_timeoutstate __P((void)); 247145522Sdarrenrextern int fr_tcp_age __P((struct ipftqent *, struct fr_info *, 248145522Sdarrenr struct ipftq *, int)); 249145522Sdarrenrextern int fr_tcpinwindow __P((struct fr_info *, struct tcpdata *, 250145522Sdarrenr struct tcpdata *, tcphdr_t *, int)); 25153642Sguidoextern void fr_stateunload __P((void)); 25253642Sguidoextern void ipstate_log __P((struct ipstate *, u_int)); 253170268Sdarrenrextern int fr_state_ioctl __P((caddr_t, ioctlcmd_t, int, int, void *)); 254145522Sdarrenrextern void fr_stinsert __P((struct ipstate *, int)); 255145522Sdarrenrextern void fr_sttab_init __P((struct ipftq *)); 256145522Sdarrenrextern void fr_sttab_destroy __P((struct ipftq *)); 257145522Sdarrenrextern void fr_updatestate __P((fr_info_t *, ipstate_t *, ipftq_t *)); 258170268Sdarrenrextern void fr_statederef __P((ipstate_t **)); 259145522Sdarrenrextern void fr_setstatequeue __P((ipstate_t *, int)); 26053642Sguido 26153642Sguido#endif /* __IP_STATE_H__ */ 262