/* $NetBSD: ip_state.h,v 1.22 2002/05/02 17:12:07 martti Exp $ */ /* * 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 2.13.2.12 2002/03/25 11:14:55 darrenr Exp */ #ifndef _NETINET_IP_STATE_H_ #define _NETINET_IP_STATE_H_ #if defined(__STDC__) || defined(__GNUC__) # define SIOCDELST _IOW('r', 61, struct ipstate *) #else # define SIOCDELST _IOW(r, 61, struct ipstate *) #endif #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 udpstate { u_short us_sport; u_short us_dport; } udpstate_t; typedef struct icmpstate { u_short ics_id; u_short ics_seq; u_char ics_type; } icmpstate_t; typedef struct tcpdata { u_32_t td_end; u_32_t td_maxend; u_32_t td_maxwin; u_char td_wscale; } tcpdata_t; typedef struct tcpstate { u_short ts_sport; u_short ts_dport; tcpdata_t ts_data[2]; u_char ts_state[2]; } tcpstate_t; typedef struct ipstate { struct ipstate *is_next; struct ipstate **is_pnext; struct ipstate *is_hnext; struct ipstate **is_phnext; struct ipstate **is_me; frentry_t *is_rule; U_QUAD_T is_pkts; U_QUAD_T is_bytes; union i6addr is_src; union i6addr is_dst; void *is_ifp[4]; u_long is_age; u_int is_frage[2]; /* age from filter rule, forward & reverse */ u_int is_pass; u_char is_p; /* Protocol */ u_char is_v; /* IP version */ u_char is_fsm; /* 1 = following FSM, 0 = not */ u_char is_xxx; /* pad */ u_int is_hv; /* hash value for this in the table */ u_32_t is_rulen; /* rule number */ u_32_t is_flags; /* flags for this structure */ u_32_t is_opt; /* packet options set */ u_32_t is_optmsk; /* " " mask */ 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 { icmpstate_t is_ics; tcpstate_t is_ts; udpstate_t is_us; } is_ps; char is_ifname[4][IFNAMSIZ]; #if SOLARIS || defined(__sgi) kmutex_t is_lock; #endif } ipstate_t; #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.ics_type #define is_code is_icmp.ics_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_swscale is_tcp.ts_data[0].td_wscale #define is_dwscale is_tcp.ts_data[1].td_wscale #define is_maxsend is_tcp.ts_data[0].td_maxend #define is_maxdend is_tcp.ts_data[1].td_maxend #define is_sport is_tcp.ts_sport #define is_dport is_tcp.ts_dport #define is_state is_tcp.ts_state #define is_ifpin is_ifp[0] #define is_ifpout is_ifp[2] #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. */ 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; U_QUAD_T isl_bytes; union i6addr isl_src; union i6addr isl_dst; 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]; } 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_EXPIRE 0xffff #define ISL_FLUSH 0xfffe #define ISL_REMOVE 0xfffd typedef struct ips_stat { u_long iss_hits; u_long iss_miss; u_long iss_max; 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; ipstate_t **iss_table; ipstate_t *iss_list; } ips_stat_t; extern u_long fr_tcpidletimeout; extern u_long fr_tcpclosewait; extern u_long fr_tcplastack; extern u_long fr_tcptimeout; extern u_long fr_tcpclosed; extern u_long fr_tcphalfclosed; extern u_long fr_udptimeout; extern u_long fr_udpacktimeout; extern u_long fr_icmptimeout; extern u_long fr_icmpacktimeout; extern ipstate_t *ips_list; extern int fr_state_lock; extern int fr_stateinit __P((void)); extern int fr_tcpstate __P((ipstate_t *, fr_info_t *, ip_t *, tcphdr_t *)); extern ipstate_t *fr_addstate __P((ip_t *, fr_info_t *, ipstate_t **, u_int)); extern frentry_t *fr_checkstate __P((ip_t *, fr_info_t *)); extern void ip_statesync __P((void *)); extern void fr_timeoutstate __P((void)); extern int fr_tcp_age __P((u_long *, u_char *, fr_info_t *, int, int)); extern void fr_stateunload __P((void)); extern void ipstate_log __P((struct ipstate *, u_int)); #if defined(__NetBSD__) || defined(__OpenBSD__) extern int fr_state_ioctl __P((caddr_t, u_long, int)); #else extern int fr_state_ioctl __P((caddr_t, int, int)); #endif #endif /* _NETINET_IP_STATE_H_ */