/* * Copyright (C) 1995-2001 by Darren Reed. * * See the IPFILTER.LICENCE file for details on licencing. * * @(#)ip_state.h 1.3 1/12/96 (C) 1995 Darren Reed * $Id: ip_state.h,v 2.68.2.5 2005/08/11 19:58:04 darrenr Exp $ * * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #ifndef __IP_STATE_H__ #define __IP_STATE_H__ #if defined(__STDC__) || defined(__GNUC__) || defined(_AIX51) # define SIOCDELST _IOW('r', 61, struct ipfobj) #else # define SIOCDELST _IOW(r, 61, struct ipfobj) #endif struct ipscan; #ifndef IPSTATE_SIZE # define IPSTATE_SIZE 5737 #endif #ifndef IPSTATE_MAX # define IPSTATE_MAX 4013 /* Maximum number of states held */ #endif #define PAIRS(s1,d1,s2,d2) ((((s1) == (s2)) && ((d1) == (d2))) ||\ (((s1) == (d2)) && ((d1) == (s2)))) #define IPPAIR(s1,d1,s2,d2) PAIRS((s1).s_addr, (d1).s_addr, \ (s2).s_addr, (d2).s_addr) typedef struct ipstate { ipfmutex_t is_lock; struct ipstate *is_next; struct ipstate **is_pnext; struct ipstate *is_hnext; struct ipstate **is_phnext; struct ipstate **is_me; void *is_ifp[4]; void *is_sync; struct nat *is_nat[2]; frentry_t *is_rule; struct ipftq *is_tqehead[2]; struct ipscan *is_isc; U_QUAD_T is_pkts[4]; U_QUAD_T is_bytes[4]; U_QUAD_T is_icmppkts[4]; struct ipftqent is_sti; u_int is_frage[2]; int is_ref; /* reference count */ int is_isninc[2]; u_short is_sumd[2]; i6addr_t is_src; i6addr_t is_dst; u_int is_pass; u_char is_p; /* Protocol */ u_char is_v; u_32_t is_hv; u_32_t is_tag; u_32_t is_opt[2]; /* packet options set */ /* in both directions */ u_32_t is_optmsk[2]; /* " " mask */ /* in both directions */ u_short is_sec; /* security options set */ u_short is_secmsk; /* " " mask */ u_short is_auth; /* authentication options set */ u_short is_authmsk; /* " " mask */ union { icmpinfo_t is_ics; tcpinfo_t is_ts; udpinfo_t is_us; greinfo_t is_ug; } is_ps; u_32_t is_flags; int is_flx[2][2]; u_32_t is_rulen; /* rule number when created */ u_32_t is_s0[2]; u_short is_smsk[2]; char is_group[FR_GROUPLEN]; char is_sbuf[2][16]; char is_ifname[4][LIFNAMSIZ]; } ipstate_t; #define is_die is_sti.tqe_die #define is_state is_sti.tqe_state #define is_saddr is_src.in4.s_addr #define is_daddr is_dst.in4.s_addr #define is_icmp is_ps.is_ics #define is_type is_icmp.ici_type #define is_code is_icmp.ici_code #define is_tcp is_ps.is_ts #define is_udp is_ps.is_us #define is_send is_tcp.ts_data[0].td_end #define is_dend is_tcp.ts_data[1].td_end #define is_maxswin is_tcp.ts_data[0].td_maxwin #define is_maxdwin is_tcp.ts_data[1].td_maxwin #define is_maxsend is_tcp.ts_data[0].td_maxend #define is_maxdend is_tcp.ts_data[1].td_maxend #define is_swinscale is_tcp.ts_data[0].td_winscale #define is_dwinscale is_tcp.ts_data[1].td_winscale #define is_swinflags is_tcp.ts_data[0].td_winflags #define is_dwinflags is_tcp.ts_data[1].td_winflags #define is_sport is_tcp.ts_sport #define is_dport is_tcp.ts_dport #define is_ifpin is_ifp[0] #define is_ifpout is_ifp[2] #define is_gre is_ps.is_ug #define is_call is_gre.gs_call #define IS_WSPORT SI_W_SPORT /* 0x00100 */ #define IS_WDPORT SI_W_DPORT /* 0x00200 */ #define IS_WSADDR SI_W_SADDR /* 0x00400 */ #define IS_WDADDR SI_W_DADDR /* 0x00800 */ #define IS_NEWFR SI_NEWFR /* 0x01000 */ #define IS_CLONE SI_CLONE /* 0x02000 */ #define IS_CLONED SI_CLONED /* 0x04000 */ #define IS_TCPFSM 0x10000 #define IS_STRICT 0x20000 #define IS_ISNSYN 0x40000 #define IS_ISNACK 0x80000 #define IS_STATESYNC 0x100000 /* * IS_SC flags are for scan-operations that need to be recognised in state. */ #define IS_SC_CLIENT 0x10000000 #define IS_SC_SERVER 0x20000000 #define IS_SC_MATCHC 0x40000000 #define IS_SC_MATCHS 0x80000000 #define IS_SC_MATCHALL (IS_SC_MATCHC|IS_SC_MATCHC) #define IS_SC_ALL (IS_SC_MATCHC|IS_SC_MATCHC|IS_SC_CLIENT|IS_SC_SERVER) /* * Flags that can be passed into fr_addstate */ #define IS_INHERITED 0x0fffff00 #define TH_OPENING (TH_SYN|TH_ACK) /* * is_flags: * Bits 0 - 3 are use as a mask with the current packet's bits to check for * whether it is short, tcp/udp, a fragment or the presence of IP options. * Bits 4 - 7 are set from the initial packet and contain what the packet * anded with bits 0-3 must match. * Bits 8,9 are used to indicate wildcard source/destination port matching. * Bits 10,11 are reserved for other wildcard flag compatibility. * Bits 12,13 are for scaning. */ typedef struct ipstate_save { void *ips_next; struct ipstate ips_is; struct frentry ips_fr; } ipstate_save_t; #define ips_rule ips_is.is_rule typedef struct ipslog { U_QUAD_T isl_pkts[4]; U_QUAD_T isl_bytes[4]; i6addr_t isl_src; i6addr_t isl_dst; u_32_t isl_tag; u_short isl_type; union { u_short isl_filler[2]; u_short isl_ports[2]; u_short isl_icmp; } isl_ps; u_char isl_v; u_char isl_p; u_char isl_flags; u_char isl_state[2]; u_32_t isl_rulen; char isl_group[FR_GROUPLEN]; } ipslog_t; #define isl_sport isl_ps.isl_ports[0] #define isl_dport isl_ps.isl_ports[1] #define isl_itype isl_ps.isl_icmp #define ISL_NEW 0 #define ISL_CLONE 1 #define ISL_EXPIRE 0xffff #define ISL_FLUSH 0xfffe #define ISL_REMOVE 0xfffd #define ISL_INTERMEDIATE 0xfffc #define ISL_KILLED 0xfffb #define ISL_ORPHAN 0xfffa typedef struct ips_stat { u_long iss_hits; u_long iss_miss; u_long iss_max; u_long iss_maxref; u_long iss_tcp; u_long iss_udp; u_long iss_icmp; u_long iss_nomem; u_long iss_expire; u_long iss_fin; u_long iss_active; u_long iss_logged; u_long iss_logfail; u_long iss_inuse; u_long iss_wild; u_long iss_killed; u_long iss_ticks; u_long iss_bucketfull; int iss_statesize; int iss_statemax; ipstate_t **iss_table; ipstate_t *iss_list; u_long *iss_bucketlen; u_int iss_orphans; } ips_stat_t; typedef struct port_pair { uint16_t pp_sport; uint16_t pp_dport; } port_pair_t; extern int fr_stateinit __P((ipf_stack_t *)); extern ipstate_t *fr_addstate __P((fr_info_t *, ipstate_t **, u_int)); extern frentry_t *fr_checkstate __P((struct fr_info *, u_32_t *)); extern ipstate_t *fr_stlookup __P((fr_info_t *, tcphdr_t *, ipftq_t **)); extern void fr_statesync __P((int, int, void *, char *, ipf_stack_t *)); extern void fr_timeoutstate __P((ipf_stack_t *)); extern int fr_tcp_age __P((struct ipftqent *, struct fr_info *, struct ipftq *, int)); extern int fr_tcpinwindow __P((struct fr_info *, struct tcpdata *, struct tcpdata *, tcphdr_t *, int)); extern void fr_stateunload __P((ipf_stack_t *)); extern void ipstate_log __P((struct ipstate *, u_int, ipf_stack_t *)); extern int fr_state_ioctl __P((caddr_t, ioctlcmd_t, int, int, void *, ipf_stack_t *)); extern void fr_stinsert __P((struct ipstate *, int, ipf_stack_t *)); extern void fr_sttab_init __P((struct ipftq *, ipf_stack_t *)); extern void fr_sttab_destroy __P((struct ipftq *)); extern void fr_updatestate __P((fr_info_t *, ipstate_t *, ipftq_t *)); extern void fr_statederef __P((ipstate_t **, ipf_stack_t *)); extern void fr_setstatequeue __P((ipstate_t *, int, ipf_stack_t *)); extern int fr_delstate __P((ipstate_t *, int, ipf_stack_t *)); #endif /* __IP_STATE_H__ */