1 2/* 3 * Copyright (C) 2012 by Darren Reed. 4 * 5 * See the IPFILTER.LICENCE file for details on licencing. 6 * Id: ip_state.h,v 2.68.2.10 2007/10/16 09:33:24 darrenr Exp $ 7 */ 8#ifndef __IP_STATE_H__ 9#define __IP_STATE_H__ 10 11# define SIOCDELST _IOW('r', 61, struct ipfobj) 12 13struct ipscan; 14 15#ifndef IPSTATE_SIZE 16# define IPSTATE_SIZE 5737 17#endif 18#ifndef IPSTATE_MAX 19# define IPSTATE_MAX 4013 /* Maximum number of states held */ 20#endif 21 22#define PAIRS(s1,d1,s2,d2) ((((s1) == (s2)) && ((d1) == (d2))) ||\ 23 (((s1) == (d2)) && ((d1) == (s2)))) 24#define IPPAIR(s1,d1,s2,d2) PAIRS((s1).s_addr, (d1).s_addr, \ 25 (s2).s_addr, (d2).s_addr) 26 27 28typedef struct ipstate { 29 ipfmutex_t is_lock; 30 struct ipstate *is_next; 31 struct ipstate **is_pnext; 32 struct ipstate *is_hnext; 33 struct ipstate **is_phnext; 34 struct ipstate **is_me; 35 void *is_ifp[4]; 36 void *is_sync; 37 frentry_t *is_rule; 38 struct ipftq *is_tqehead[2]; 39 struct ipscan *is_isc; 40 U_QUAD_T is_pkts[4]; 41 U_QUAD_T is_bytes[4]; 42 U_QUAD_T is_icmppkts[4]; 43 struct ipftqent is_sti; 44 u_int is_frage[2]; 45 int is_ref; /* reference count */ 46 int is_isninc[2]; 47 u_short is_sumd[2]; 48 i6addr_t is_src; 49 i6addr_t is_dst; 50 u_int is_pass; 51 u_char is_p; /* Protocol */ 52 u_char is_v; 53 int is_family; 54 u_32_t is_hv; 55 u_32_t is_tag; 56 u_32_t is_opt[2]; /* packet options set */ 57 u_32_t is_optmsk[2]; /* " " mask */ 58 u_short is_sec; /* security options set */ 59 u_short is_secmsk; /* " " mask */ 60 u_short is_auth; /* authentication options set */ 61 u_short is_authmsk; /* " " mask */ 62 union { 63 icmpinfo_t is_ics; 64 tcpinfo_t is_ts; 65 udpinfo_t is_us; 66 greinfo_t is_ug; 67 } is_ps; 68 u_32_t is_flags; 69 int is_flx[2][2]; 70 u_32_t is_rulen; /* rule number when created */ 71 u_32_t is_s0[2]; 72 u_short is_smsk[2]; 73 frdest_t is_dif; 74 frdest_t is_tifs[2]; 75 char is_group[FR_GROUPLEN]; 76 char is_sbuf[2][16]; 77 char is_ifname[4][LIFNAMSIZ]; 78} ipstate_t; 79 80#define is_die is_sti.tqe_die 81#define is_state is_sti.tqe_state 82#define is_touched is_sti.tqe_touched 83#define is_saddr is_src.in4.s_addr 84#define is_daddr is_dst.in4.s_addr 85#define is_icmp is_ps.is_ics 86#define is_type is_icmp.ici_type 87#define is_tcp is_ps.is_ts 88#define is_udp is_ps.is_us 89#define is_send is_tcp.ts_data[0].td_end 90#define is_dend is_tcp.ts_data[1].td_end 91#define is_maxswin is_tcp.ts_data[0].td_maxwin 92#define is_maxdwin is_tcp.ts_data[1].td_maxwin 93#define is_maxsend is_tcp.ts_data[0].td_maxend 94#define is_maxdend is_tcp.ts_data[1].td_maxend 95#define is_swinscale is_tcp.ts_data[0].td_winscale 96#define is_dwinscale is_tcp.ts_data[1].td_winscale 97#define is_swinflags is_tcp.ts_data[0].td_winflags 98#define is_dwinflags is_tcp.ts_data[1].td_winflags 99#define is_sport is_tcp.ts_sport 100#define is_dport is_tcp.ts_dport 101#define is_ifpin is_ifp[0] 102#define is_ifpout is_ifp[2] 103#define is_gre is_ps.is_ug 104#define is_call is_gre.gs_call 105 106#define IS_WSPORT SI_W_SPORT /* 0x00100 */ 107#define IS_WDPORT SI_W_DPORT /* 0x00200 */ 108#define IS_WSADDR SI_W_SADDR /* 0x00400 */ 109#define IS_WDADDR SI_W_DADDR /* 0x00800 */ 110#define IS_NEWFR SI_NEWFR /* 0x01000 */ 111#define IS_CLONE SI_CLONE /* 0x02000 */ 112#define IS_CLONED SI_CLONED /* 0x04000 */ 113#define IS_TCPFSM 0x10000 114#define IS_STRICT 0x20000 115#define IS_ISNSYN 0x40000 116#define IS_ISNACK 0x80000 117#define IS_STATESYNC 0x100000 118#define IS_LOOSE 0x200000 119/* 120 * IS_SC flags are for scan-operations that need to be recognised in state. 121 */ 122#define IS_SC_CLIENT 0x10000000 123#define IS_SC_SERVER 0x20000000 124#define IS_SC_MATCHC 0x40000000 125#define IS_SC_MATCHS 0x80000000 126#define IS_SC_MATCHALL (IS_SC_MATCHC|IS_SC_MATCHC) 127#define IS_SC_ALL (IS_SC_MATCHC|IS_SC_MATCHC|IS_SC_CLIENT|IS_SC_SERVER) 128 129/* 130 * Flags that can be passed into ipf_addstate 131 */ 132#define IS_INHERITED 0x0fffff00 133 134#define TH_OPENING (TH_SYN|TH_ACK) 135/* 136 * is_flags: 137 * Bits 0 - 3 are use as a mask with the current packet's bits to check for 138 * whether it is short, tcp/udp, a fragment or the presence of IP options. 139 * Bits 4 - 7 are set from the initial packet and contain what the packet 140 * anded with bits 0-3 must match. 141 * Bits 8,9 are used to indicate wildcard source/destination port matching. 142 * Bits 10,11 are reserved for other wildcard flag compatibility. 143 * Bits 12,13 are for scaning. 144 */ 145 146typedef struct ipstate_save { 147 void *ips_next; 148 struct ipstate ips_is; 149 struct frentry ips_fr; 150} ipstate_save_t; 151 152#define ips_rule ips_is.is_rule 153 154 155typedef struct ipslog { 156 U_QUAD_T isl_pkts[4]; 157 U_QUAD_T isl_bytes[4]; 158 i6addr_t isl_src; 159 i6addr_t isl_dst; 160 u_32_t isl_tag; 161 u_short isl_type; 162 union { 163 u_short isl_filler[2]; 164 u_short isl_ports[2]; 165 u_short isl_icmp; 166 } isl_ps; 167 u_char isl_v; 168 u_char isl_p; 169 u_char isl_flags; 170 u_char isl_state[2]; 171 u_32_t isl_rulen; 172 char isl_group[FR_GROUPLEN]; 173} ipslog_t; 174 175#define isl_sport isl_ps.isl_ports[0] 176#define isl_dport isl_ps.isl_ports[1] 177#define isl_itype isl_ps.isl_icmp 178 179#define ISL_NEW 0 180#define ISL_CLONE 1 181#define ISL_STATECHANGE 2 182#define ISL_EXPIRE 0xffff 183#define ISL_FLUSH 0xfffe 184#define ISL_REMOVE 0xfffd 185#define ISL_INTERMEDIATE 0xfffc 186#define ISL_KILLED 0xfffb 187#define ISL_ORPHAN 0xfffa 188#define ISL_UNLOAD 0xfff9 189 190 191typedef struct ips_stat { 192 u_int iss_active; 193 u_int iss_active_proto[256]; 194 u_long iss_add_bad; 195 u_long iss_add_dup; 196 u_long iss_add_locked; 197 u_long iss_add_oow; 198 u_long iss_bucket_full; 199 u_long iss_check_bad; 200 u_long iss_check_miss; 201 u_long iss_check_nattag; 202 u_long iss_check_notag; 203 u_long iss_clone_nomem; 204 u_long iss_cloned; 205 u_long iss_expire; 206 u_long iss_fin; 207 u_long iss_flush_all; 208 u_long iss_flush_closing; 209 u_long iss_flush_queue; 210 u_long iss_flush_state; 211 u_long iss_flush_timeout; 212 u_long iss_hits; 213 u_long iss_icmp6_icmperr; 214 u_long iss_icmp6_miss; 215 u_long iss_icmp6_notinfo; 216 u_long iss_icmp6_notquery; 217 u_long iss_icmp_bad; 218 u_long iss_icmp_banned; 219 u_long iss_icmp_headblock; 220 u_long iss_icmp_hits; 221 u_long iss_icmp_icmperr; 222 u_long iss_icmp_miss; 223 u_long iss_icmp_notquery; 224 u_long iss_icmp_short; 225 u_long iss_icmp_toomany; 226 u_int iss_inuse; 227 ipstate_t *iss_list; 228 u_long iss_log_fail; 229 u_long iss_log_ok; 230 u_long iss_lookup_badifp; 231 u_long iss_lookup_badport; 232 u_long iss_lookup_miss; 233 u_long iss_max; 234 u_long iss_max_ref; 235 u_long iss_max_track; 236 u_long iss_miss_mask; 237 u_long iss_nomem; 238 u_long iss_oow; 239 u_long iss_orphan; 240 u_long iss_proto[256]; 241 u_long iss_scan_block; 242 u_long iss_state_max; 243 u_long iss_state_size; 244 u_long iss_states[IPF_TCP_NSTATES]; 245 ipstate_t **iss_table; 246 u_long iss_tcp_closing; 247 u_long iss_tcp_oow; 248 u_long iss_tcp_rstadd; 249 u_long iss_tcp_toosmall; 250 u_long iss_tcp_badopt; 251 u_long iss_tcp_fsm; 252 u_long iss_tcp_strict; 253 ipftq_t *iss_tcptab; 254 u_int iss_ticks; 255 u_long iss_wild; 256 u_long iss_winsack; 257 u_int *iss_bucketlen; 258} ips_stat_t; 259 260 261typedef struct ipf_state_softc_s { 262 ipfmutex_t ipf_stinsert; 263 int ipf_state_logging; 264 int ipf_state_lock; 265 int ipf_state_doflush; 266 u_int ipf_state_inited; 267 u_int ipf_state_max; 268 u_int ipf_state_maxbucket; 269 u_int ipf_state_size; 270 u_int ipf_state_wm_freq; 271 u_int ipf_state_wm_high; 272 u_int ipf_state_wm_low; 273 u_int ipf_state_wm_last; 274 u_long *ipf_state_seed; 275 ipstate_t *ipf_state_list; 276 ipstate_t **ipf_state_table; 277 ipftuneable_t *ipf_state_tune; 278 ipftq_t *ipf_state_usertq; 279 ipftq_t ipf_state_pending; 280 ipftq_t ipf_state_deletetq; 281 ipftq_t ipf_state_udptq; 282 ipftq_t ipf_state_udpacktq; 283 ipftq_t ipf_state_iptq; 284 ipftq_t ipf_state_icmptq; 285 ipftq_t ipf_state_icmpacktq; 286 ipftq_t ipf_state_tcptq[IPF_TCP_NSTATES]; 287 ips_stat_t ipf_state_stats; 288} ipf_state_softc_t; 289 290 291#ifndef _KERNEL 292extern void ipf_state_dump(ipf_main_softc_t *, void *); 293#endif 294extern int ipf_tcp_age(struct ipftqent *, struct fr_info *, 295 struct ipftq *, int, int); 296extern int ipf_tcpinwindow(struct fr_info *, struct tcpdata *, 297 struct tcpdata *, tcphdr_t *, int); 298 299extern int ipf_state_add(ipf_main_softc_t *, fr_info_t *, 300 ipstate_t **, u_int); 301extern frentry_t *ipf_state_check(struct fr_info *, u_32_t *); 302extern void ipf_state_deref(ipf_main_softc_t *, ipstate_t **); 303extern void ipf_state_expire(ipf_main_softc_t *); 304extern int ipf_state_flush(ipf_main_softc_t *, int, int); 305extern ipstate_t *ipf_state_lookup(fr_info_t *, tcphdr_t *, ipftq_t **); 306extern int ipf_state_init(void); 307extern int ipf_state_insert(ipf_main_softc_t *, struct ipstate *, int); 308extern int ipf_state_ioctl(ipf_main_softc_t *, caddr_t, ioctlcmd_t, int, int, void *); 309extern void ipf_state_log(ipf_main_softc_t *, struct ipstate *, u_int); 310extern int ipf_state_matchflush(ipf_main_softc_t *, caddr_t); 311extern int ipf_state_rehash(ipf_main_softc_t *, ipftuneable_t *, ipftuneval_t *); 312extern void ipf_state_setqueue(ipf_main_softc_t *, ipstate_t *, int); 313extern void ipf_state_setpending(ipf_main_softc_t *, ipstate_t *); 314extern int ipf_state_settimeout(struct ipf_main_softc_s *, ipftuneable_t *, ipftuneval_t *); 315extern void ipf_state_sync(ipf_main_softc_t *, void *); 316extern void ipf_state_update(fr_info_t *, ipstate_t *); 317 318extern void ipf_sttab_init(ipf_main_softc_t *, struct ipftq *); 319extern void ipf_sttab_destroy(struct ipftq *); 320extern void ipf_state_setlock(void *, int); 321extern int ipf_state_main_load(void); 322extern int ipf_state_main_unload(void); 323extern void *ipf_state_soft_create(ipf_main_softc_t *); 324extern void ipf_state_soft_destroy(ipf_main_softc_t *, void *); 325extern int ipf_state_soft_init(ipf_main_softc_t *, void *); 326extern int ipf_state_soft_fini(ipf_main_softc_t *, void *); 327extern ipftq_t *ipf_state_add_tq(ipf_main_softc_t *, int); 328 329#endif /* __IP_STATE_H__ */ 330