1/* $FreeBSD$ */ 2 3/* 4 * Copyright (C) 1995-2001 by Darren Reed. 5 * 6 * See the IPFILTER.LICENCE file for details on licencing. 7 * 8 * @(#)ip_state.h 1.3 1/12/96 (C) 1995 Darren Reed 9 * $FreeBSD$ 10 * Id: ip_state.h,v 2.68.2.10 2007/10/16 09:33:24 darrenr Exp $ 11 */ 12#ifndef __IP_STATE_H__ 13#define __IP_STATE_H__ 14 15#if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) 16# define SIOCDELST _IOW('r', 61, struct ipfobj) 17#else 18# define SIOCDELST _IOW(r, 61, struct ipfobj) 19#endif 20 21struct ipscan; 22 23#ifndef IPSTATE_SIZE 24# define IPSTATE_SIZE 5737 25#endif 26#ifndef IPSTATE_MAX 27# define IPSTATE_MAX 4013 /* Maximum number of states held */ 28#endif 29 30#define SEQ_GE(a,b) ((int)((a) - (b)) >= 0) 31#define SEQ_GT(a,b) ((int)((a) - (b)) > 0) 32 33 34typedef struct ipstate { 35 ipfmutex_t is_lock; 36 struct ipstate *is_next; 37 struct ipstate **is_pnext; 38 struct ipstate *is_hnext; 39 struct ipstate **is_phnext; 40 struct ipstate **is_me; 41 void *is_ifp[4]; 42 void *is_sync; 43 frentry_t *is_rule; 44 struct ipftq *is_tqehead[2]; 45 struct ipscan *is_isc; 46 U_QUAD_T is_pkts[4]; 47 U_QUAD_T is_bytes[4]; 48 U_QUAD_T is_icmppkts[4]; 49 struct ipftqent is_sti; 50 u_int is_frage[2]; 51 int is_ref; /* reference count */ 52 int is_isninc[2]; 53 u_short is_sumd[2]; 54 i6addr_t is_src; 55 i6addr_t is_dst; 56 u_int is_pass; 57 u_char is_p; /* Protocol */ 58 u_char is_v; 59 u_32_t is_hv; 60 u_32_t is_tag; 61 u_32_t is_opt[2]; /* packet options set */ 62 u_32_t is_optmsk[2]; /* " " mask */ 63 u_short is_sec; /* security options set */ 64 u_short is_secmsk; /* " " mask */ 65 u_short is_auth; /* authentication options set */ 66 u_short is_authmsk; /* " " mask */ 67 union { 68 icmpinfo_t is_ics; 69 tcpinfo_t is_ts; 70 udpinfo_t is_us; 71 greinfo_t is_ug; 72 } is_ps; 73 u_32_t is_flags; 74 int is_flx[2][2]; 75 u_32_t is_rulen; /* rule number when created */ 76 u_32_t is_s0[2]; 77 u_short is_smsk[2]; 78 char is_group[FR_GROUPLEN]; 79 char is_sbuf[2][16]; 80 char is_ifname[4][LIFNAMSIZ]; 81} ipstate_t; 82 83#define is_die is_sti.tqe_die 84#define is_state is_sti.tqe_state 85#define is_touched is_sti.tqe_touched 86#define is_saddr is_src.in4.s_addr 87#define is_daddr is_dst.in4.s_addr 88#define is_icmp is_ps.is_ics 89#define is_type is_icmp.ici_type 90#define is_code is_icmp.ici_code 91#define is_tcp is_ps.is_ts 92#define is_udp is_ps.is_us 93#define is_send is_tcp.ts_data[0].td_end 94#define is_dend is_tcp.ts_data[1].td_end 95#define is_maxswin is_tcp.ts_data[0].td_maxwin 96#define is_maxdwin is_tcp.ts_data[1].td_maxwin 97#define is_maxsend is_tcp.ts_data[0].td_maxend 98#define is_maxdend is_tcp.ts_data[1].td_maxend 99#define is_swinscale is_tcp.ts_data[0].td_winscale 100#define is_dwinscale is_tcp.ts_data[1].td_winscale 101#define is_swinflags is_tcp.ts_data[0].td_winflags 102#define is_dwinflags is_tcp.ts_data[1].td_winflags 103#define is_sport is_tcp.ts_sport 104#define is_dport is_tcp.ts_dport 105#define is_ifpin is_ifp[0] 106#define is_ifpout is_ifp[2] 107#define is_gre is_ps.is_ug 108#define is_call is_gre.gs_call 109 110#define IS_WSPORT SI_W_SPORT /* 0x00100 */ 111#define IS_WDPORT SI_W_DPORT /* 0x00200 */ 112#define IS_WSADDR SI_W_SADDR /* 0x00400 */ 113#define IS_WDADDR SI_W_DADDR /* 0x00800 */ 114#define IS_NEWFR SI_NEWFR /* 0x01000 */ 115#define IS_CLONE SI_CLONE /* 0x02000 */ 116#define IS_CLONED SI_CLONED /* 0x04000 */ 117#define IS_TCPFSM 0x10000 118#define IS_STRICT 0x20000 119#define IS_ISNSYN 0x40000 120#define IS_ISNACK 0x80000 121#define IS_STATESYNC 0x100000 122/* 123 * IS_SC flags are for scan-operations that need to be recognised in state. 124 */ 125#define IS_SC_CLIENT 0x10000000 126#define IS_SC_SERVER 0x20000000 127#define IS_SC_MATCHC 0x40000000 128#define IS_SC_MATCHS 0x80000000 129#define IS_SC_MATCHALL (IS_SC_MATCHC|IS_SC_MATCHC) 130#define IS_SC_ALL (IS_SC_MATCHC|IS_SC_MATCHC|IS_SC_CLIENT|IS_SC_SERVER) 131 132/* 133 * Flags that can be passed into fr_addstate 134 */ 135#define IS_INHERITED 0x0fffff00 136 137#define TH_OPENING (TH_SYN|TH_ACK) 138/* 139 * is_flags: 140 * Bits 0 - 3 are use as a mask with the current packet's bits to check for 141 * whether it is short, tcp/udp, a fragment or the presence of IP options. 142 * Bits 4 - 7 are set from the initial packet and contain what the packet 143 * anded with bits 0-3 must match. 144 * Bits 8,9 are used to indicate wildcard source/destination port matching. 145 * Bits 10,11 are reserved for other wildcard flag compatibility. 146 * Bits 12,13 are for scaning. 147 */ 148 149typedef struct ipstate_save { 150 void *ips_next; 151 struct ipstate ips_is; 152 struct frentry ips_fr; 153} ipstate_save_t; 154 155#define ips_rule ips_is.is_rule 156 157 158typedef struct ipslog { 159 U_QUAD_T isl_pkts[4]; 160 U_QUAD_T isl_bytes[4]; 161 i6addr_t isl_src; 162 i6addr_t isl_dst; 163 u_32_t isl_tag; 164 u_short isl_type; 165 union { 166 u_short isl_filler[2]; 167 u_short isl_ports[2]; 168 u_short isl_icmp; 169 } isl_ps; 170 u_char isl_v; 171 u_char isl_p; 172 u_char isl_flags; 173 u_char isl_state[2]; 174 u_32_t isl_rulen; 175 char isl_group[FR_GROUPLEN]; 176} ipslog_t; 177 178#define isl_sport isl_ps.isl_ports[0] 179#define isl_dport isl_ps.isl_ports[1] 180#define isl_itype isl_ps.isl_icmp 181 182#define ISL_NEW 0 183#define ISL_CLONE 1 184#define ISL_EXPIRE 0xffff 185#define ISL_FLUSH 0xfffe 186#define ISL_REMOVE 0xfffd 187#define ISL_INTERMEDIATE 0xfffc 188#define ISL_KILLED 0xfffb 189#define ISL_ORPHAN 0xfffa 190#define ISL_UNLOAD 0xfff9 191 192 193typedef struct ips_stat { 194 u_long iss_hits; 195 u_long iss_miss; 196 u_long iss_max; 197 u_long iss_maxref; 198 u_long iss_tcp; 199 u_long iss_udp; 200 u_long iss_icmp; 201 u_long iss_nomem; 202 u_long iss_expire; 203 u_long iss_fin; 204 u_long iss_active; 205 u_long iss_logged; 206 u_long iss_logfail; 207 u_long iss_inuse; 208 u_long iss_wild; 209 u_long iss_killed; 210 u_long iss_ticks; 211 u_long iss_bucketfull; 212 int iss_statesize; 213 int iss_statemax; 214 ipstate_t **iss_table; 215 ipstate_t *iss_list; 216 u_long *iss_bucketlen; 217 ipftq_t *iss_tcptab; 218} ips_stat_t; 219 220 221extern u_long fr_tcpidletimeout; 222extern u_long fr_tcpclosewait; 223extern u_long fr_tcplastack; 224extern u_long fr_tcptimeout; 225extern u_long fr_tcpclosed; 226extern u_long fr_tcphalfclosed; 227extern u_long fr_udptimeout; 228extern u_long fr_udpacktimeout; 229extern u_long fr_icmptimeout; 230extern u_long fr_icmpacktimeout; 231extern u_long fr_iptimeout; 232extern int fr_statemax; 233extern int fr_statesize; 234extern int fr_state_lock; 235extern int fr_state_maxbucket; 236extern int fr_state_maxbucket_reset; 237extern ipstate_t *ips_list; 238extern ipftq_t *ips_utqe; 239extern ipftq_t ips_tqtqb[IPF_TCP_NSTATES]; 240 241extern int fr_stateinit __P((void)); 242extern ipstate_t *fr_addstate __P((fr_info_t *, ipstate_t **, u_int)); 243extern frentry_t *fr_checkstate __P((struct fr_info *, u_32_t *)); 244extern ipstate_t *fr_stlookup __P((fr_info_t *, tcphdr_t *, ipftq_t **)); 245extern void fr_statesync __P((void *)); 246extern void fr_timeoutstate __P((void)); 247extern int fr_tcp_age __P((struct ipftqent *, struct fr_info *, 248 struct ipftq *, int)); 249extern int fr_tcpinwindow __P((struct fr_info *, struct tcpdata *, 250 struct tcpdata *, tcphdr_t *, int)); 251extern void fr_stateunload __P((void)); 252extern void ipstate_log __P((struct ipstate *, u_int)); 253extern int fr_state_ioctl __P((caddr_t, ioctlcmd_t, int, int, void *)); 254extern void fr_stinsert __P((struct ipstate *, int)); 255extern void fr_sttab_init __P((struct ipftq *)); 256extern void fr_sttab_destroy __P((struct ipftq *)); 257extern void fr_updatestate __P((fr_info_t *, ipstate_t *, ipftq_t *)); 258extern void fr_statederef __P((ipstate_t **)); 259extern void fr_setstatequeue __P((ipstate_t *, int)); 260 261#endif /* __IP_STATE_H__ */ 262