/*- * Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _IPFW2_H #define _IPFW2_H /* * The default rule number. By the design of ip_fw, the default rule * is the last one, so its number can also serve as the highest number * allowed for a rule. The ip_fw code relies on both meanings of this * constant. */ #define IPFW_DEFAULT_RULE 65535 #define RESVD_SET 31 /*set for default and persistent rules*/ #define IPFW_MAX_SETS 32 /* Number of sets supported by ipfw*/ /* * Default number of ipfw tables. */ #define IPFW_TABLES_MAX 65535 #define IPFW_TABLES_DEFAULT 128 /* * Most commands (queue, pipe, tag, untag, limit...) can have a 16-bit * argument between 1 and 65534. The value 0 (IP_FW_TARG) is used * to represent 'tablearg' value, e.g. indicate the use of a 'tablearg' * result of the most recent table() lookup. * Note that 16bit is only a historical limit, resulting from * the use of a 16-bit fields for that value. In reality, we can have * 2^32 pipes, queues, tag values and so on. */ #define IPFW_ARG_MIN 1 #define IPFW_ARG_MAX 65534 #define IP_FW_TABLEARG 65535 /* Compat value for old clients */ #define IP_FW_TARG 0 /* Current tablearg value */ /* * Number of entries in the call stack of the call/return commands. * Call stack currently is an uint16_t array with rule numbers. */ #define IPFW_CALLSTACK_SIZE 16 /* IP_FW3 header/opcodes */ typedef struct _ip_fw3_opheader { uint16_t opcode; /* Operation opcode */ uint16_t version; /* Opcode version */ uint16_t reserved[2]; /* Align to 64-bit boundary */ } ip_fw3_opheader; /* IP_FW3 opcodes */ #define IP_FW_TABLE_XADD 86 /* add entry */ #define IP_FW_TABLE_XDEL 87 /* delete entry */ #define IP_FW_TABLE_XGETSIZE 88 /* get table size (deprecated) */ #define IP_FW_TABLE_XLIST 89 /* list table contents */ #define IP_FW_TABLE_XDESTROY 90 /* destroy table */ #define IP_FW_TABLES_XLIST 92 /* list all tables */ #define IP_FW_TABLE_XINFO 93 /* request info for one table */ #define IP_FW_TABLE_XFLUSH 94 /* flush table data */ #define IP_FW_TABLE_XCREATE 95 /* create new table */ #define IP_FW_TABLE_XMODIFY 96 /* modify existing table */ #define IP_FW_XGET 97 /* Retrieve configuration */ #define IP_FW_XADD 98 /* add rule */ #define IP_FW_XDEL 99 /* del rule */ #define IP_FW_XMOVE 100 /* move rules to different set */ #define IP_FW_XZERO 101 /* clear accounting */ #define IP_FW_XRESETLOG 102 /* zero rules logs */ #define IP_FW_SET_SWAP 103 /* Swap between 2 sets */ #define IP_FW_SET_MOVE 104 /* Move one set to another one */ #define IP_FW_SET_ENABLE 105 /* Enable/disable sets */ #define IP_FW_TABLE_XFIND 106 /* finds an entry */ #define IP_FW_XIFLIST 107 /* list tracked interfaces */ #define IP_FW_TABLES_ALIST 108 /* list table algorithms */ #define IP_FW_TABLE_XSWAP 109 /* swap two tables */ /* * The kernel representation of ipfw rules is made of a list of * 'instructions' (for all practical purposes equivalent to BPF * instructions), which specify which fields of the packet * (or its metadata) should be analysed. * * Each instruction is stored in a structure which begins with * "ipfw_insn", and can contain extra fields depending on the * instruction type (listed below). * Note that the code is written so that individual instructions * have a size which is a multiple of 32 bits. This means that, if * such structures contain pointers or other 64-bit entities, * (there is just one instance now) they may end up unaligned on * 64-bit architectures, so the must be handled with care. * * "enum ipfw_opcodes" are the opcodes supported. We can have up * to 256 different opcodes. When adding new opcodes, they should * be appended to the end of the opcode list before O_LAST_OPCODE, * this will prevent the ABI from being broken, otherwise users * will have to recompile ipfw(8) when they update the kernel. */ enum ipfw_opcodes { /* arguments (4 byte each) */ O_NOP, O_IP_SRC, /* u32 = IP */ O_IP_SRC_MASK, /* ip = IP/mask */ O_IP_SRC_ME, /* none */ O_IP_SRC_SET, /* u32=base, arg1=len, bitmap */ O_IP_DST, /* u32 = IP */ O_IP_DST_MASK, /* ip = IP/mask */ O_IP_DST_ME, /* none */ O_IP_DST_SET, /* u32=base, arg1=len, bitmap */ O_IP_SRCPORT, /* (n)port list:mask 4 byte ea */ O_IP_DSTPORT, /* (n)port list:mask 4 byte ea */ O_PROTO, /* arg1=protocol */ O_MACADDR2, /* 2 mac addr:mask */ O_MAC_TYPE, /* same as srcport */ O_LAYER2, /* none */ O_IN, /* none */ O_FRAG, /* none */ O_RECV, /* none */ O_XMIT, /* none */ O_VIA, /* none */ O_IPOPT, /* arg1 = 2*u8 bitmap */ O_IPLEN, /* arg1 = len */ O_IPID, /* arg1 = id */ O_IPTOS, /* arg1 = id */ O_IPPRECEDENCE, /* arg1 = precedence << 5 */ O_IPTTL, /* arg1 = TTL */ O_IPVER, /* arg1 = version */ O_UID, /* u32 = id */ O_GID, /* u32 = id */ O_ESTAB, /* none (tcp established) */ O_TCPFLAGS, /* arg1 = 2*u8 bitmap */ O_TCPWIN, /* arg1 = desired win */ O_TCPSEQ, /* u32 = desired seq. */ O_TCPACK, /* u32 = desired seq. */ O_ICMPTYPE, /* u32 = icmp bitmap */ O_TCPOPTS, /* arg1 = 2*u8 bitmap */ O_VERREVPATH, /* none */ O_VERSRCREACH, /* none */ O_PROBE_STATE, /* none */ O_KEEP_STATE, /* none */ O_LIMIT, /* ipfw_insn_limit */ O_LIMIT_PARENT, /* dyn_type, not an opcode. */ /* * These are really 'actions'. */ O_LOG, /* ipfw_insn_log */ O_PROB, /* u32 = match probability */ O_CHECK_STATE, /* none */ O_ACCEPT, /* none */ O_DENY, /* none */ O_REJECT, /* arg1=icmp arg (same as deny) */ O_COUNT, /* none */ O_SKIPTO, /* arg1=next rule number */ O_PIPE, /* arg1=pipe number */ O_QUEUE, /* arg1=queue number */ O_DIVERT, /* arg1=port number */ O_TEE, /* arg1=port number */ O_FORWARD_IP, /* fwd sockaddr */ O_FORWARD_MAC, /* fwd mac */ O_NAT, /* nope */ O_REASS, /* none */ /* * More opcodes. */ O_IPSEC, /* has ipsec history */ O_IP_SRC_LOOKUP, /* arg1=table number, u32=value */ O_IP_DST_LOOKUP, /* arg1=table number, u32=value */ O_ANTISPOOF, /* none */ O_JAIL, /* u32 = id */ O_ALTQ, /* u32 = altq classif. qid */ O_DIVERTED, /* arg1=bitmap (1:loop, 2:out) */ O_TCPDATALEN, /* arg1 = tcp data len */ O_IP6_SRC, /* address without mask */ O_IP6_SRC_ME, /* my addresses */ O_IP6_SRC_MASK, /* address with the mask */ O_IP6_DST, O_IP6_DST_ME, O_IP6_DST_MASK, O_FLOW6ID, /* for flow id tag in the ipv6 pkt */ O_ICMP6TYPE, /* icmp6 packet type filtering */ O_EXT_HDR, /* filtering for ipv6 extension header */ O_IP6, /* * actions for ng_ipfw */ O_NETGRAPH, /* send to ng_ipfw */ O_NGTEE, /* copy to ng_ipfw */ O_IP4, O_UNREACH6, /* arg1=icmpv6 code arg (deny) */ O_TAG, /* arg1=tag number */ O_TAGGED, /* arg1=tag number */ O_SETFIB, /* arg1=FIB number */ O_FIB, /* arg1=FIB desired fib number */ O_SOCKARG, /* socket argument */ O_CALLRETURN, /* arg1=called rule number */ O_FORWARD_IP6, /* fwd sockaddr_in6 */ O_DSCP, /* 2 u32 = DSCP mask */ O_SETDSCP, /* arg1=DSCP value */ O_IP_FLOW_LOOKUP, /* arg1=table number, u32=value */ O_LAST_OPCODE /* not an opcode! */ }; /* * The extension header are filtered only for presence using a bit * vector with a flag for each header. */ #define EXT_FRAGMENT 0x1 #define EXT_HOPOPTS 0x2 #define EXT_ROUTING 0x4 #define EXT_AH 0x8 #define EXT_ESP 0x10 #define EXT_DSTOPTS 0x20 #define EXT_RTHDR0 0x40 #define EXT_RTHDR2 0x80 /* * Template for instructions. * * ipfw_insn is used for all instructions which require no operands, * a single 16-bit value (arg1), or a couple of 8-bit values. * * For other instructions which require different/larger arguments * we have derived structures, ipfw_insn_*. * * The size of the instruction (in 32-bit words) is in the low * 6 bits of "len". The 2 remaining bits are used to implement * NOT and OR on individual instructions. Given a type, you can * compute the length to be put in "len" using F_INSN_SIZE(t) * * F_NOT negates the match result of the instruction. * * F_OR is used to build or blocks. By default, instructions * are evaluated as part of a logical AND. An "or" block * { X or Y or Z } contains F_OR set in all but the last * instruction of the block. A match will cause the code * to skip past the last instruction of the block. * * NOTA BENE: in a couple of places we assume that * sizeof(ipfw_insn) == sizeof(u_int32_t) * this needs to be fixed. * */ typedef struct _ipfw_insn { /* template for instructions */ u_int8_t opcode; u_int8_t len; /* number of 32-bit words */ #define F_NOT 0x80 #define F_OR 0x40 #define F_LEN_MASK 0x3f #define F_LEN(cmd) ((cmd)->len & F_LEN_MASK) u_int16_t arg1; } ipfw_insn; /* * The F_INSN_SIZE(type) computes the size, in 4-byte words, of * a given type. */ #define F_INSN_SIZE(t) ((sizeof (t))/sizeof(u_int32_t)) /* * This is used to store an array of 16-bit entries (ports etc.) */ typedef struct _ipfw_insn_u16 { ipfw_insn o; u_int16_t ports[2]; /* there may be more */ } ipfw_insn_u16; /* * This is used to store an array of 32-bit entries * (uid, single IPv4 addresses etc.) */ typedef struct _ipfw_insn_u32 { ipfw_insn o; u_int32_t d[1]; /* one or more */ } ipfw_insn_u32; /* * This is used to store IP addr-mask pairs. */ typedef struct _ipfw_insn_ip { ipfw_insn o; struct in_addr addr; struct in_addr mask; } ipfw_insn_ip; /* * This is used to forward to a given address (ip). */ typedef struct _ipfw_insn_sa { ipfw_insn o; struct sockaddr_in sa; } ipfw_insn_sa; /* * This is used to forward to a given address (ipv6). */ typedef struct _ipfw_insn_sa6 { ipfw_insn o; struct sockaddr_in6 sa; } ipfw_insn_sa6; /* * This is used for MAC addr-mask pairs. */ typedef struct _ipfw_insn_mac { ipfw_insn o; u_char addr[12]; /* dst[6] + src[6] */ u_char mask[12]; /* dst[6] + src[6] */ } ipfw_insn_mac; /* * This is used for interface match rules (recv xx, xmit xx). */ typedef struct _ipfw_insn_if { ipfw_insn o; union { struct in_addr ip; int glob; uint16_t kidx; } p; char name[IFNAMSIZ]; } ipfw_insn_if; /* * This is used for storing an altq queue id number. */ typedef struct _ipfw_insn_altq { ipfw_insn o; u_int32_t qid; } ipfw_insn_altq; /* * This is used for limit rules. */ typedef struct _ipfw_insn_limit { ipfw_insn o; u_int8_t _pad; u_int8_t limit_mask; /* combination of DYN_* below */ #define DYN_SRC_ADDR 0x1 #define DYN_SRC_PORT 0x2 #define DYN_DST_ADDR 0x4 #define DYN_DST_PORT 0x8 u_int16_t conn_limit; } ipfw_insn_limit; /* * This is used for log instructions. */ typedef struct _ipfw_insn_log { ipfw_insn o; u_int32_t max_log; /* how many do we log -- 0 = all */ u_int32_t log_left; /* how many left to log */ } ipfw_insn_log; /* * Data structures required by both ipfw(8) and ipfw(4) but not part of the * management API are protected by IPFW_INTERNAL. */ #ifdef IPFW_INTERNAL /* Server pool support (LSNAT). */ struct cfg_spool { LIST_ENTRY(cfg_spool) _next; /* chain of spool instances */ struct in_addr addr; u_short port; }; #endif /* Redirect modes id. */ #define REDIR_ADDR 0x01 #define REDIR_PORT 0x02 #define REDIR_PROTO 0x04 #ifdef IPFW_INTERNAL /* Nat redirect configuration. */ struct cfg_redir { LIST_ENTRY(cfg_redir) _next; /* chain of redir instances */ u_int16_t mode; /* type of redirect mode */ struct in_addr laddr; /* local ip address */ struct in_addr paddr; /* public ip address */ struct in_addr raddr; /* remote ip address */ u_short lport; /* local port */ u_short pport; /* public port */ u_short rport; /* remote port */ u_short pport_cnt; /* number of public ports */ u_short rport_cnt; /* number of remote ports */ int proto; /* protocol: tcp/udp */ struct alias_link **alink; /* num of entry in spool chain */ u_int16_t spool_cnt; /* chain of spool instances */ LIST_HEAD(spool_chain, cfg_spool) spool_chain; }; #endif #ifdef IPFW_INTERNAL /* Nat configuration data struct. */ struct cfg_nat { /* chain of nat instances */ LIST_ENTRY(cfg_nat) _next; int id; /* nat id */ struct in_addr ip; /* nat ip address */ char if_name[IF_NAMESIZE]; /* interface name */ int mode; /* aliasing mode */ struct libalias *lib; /* libalias instance */ /* number of entry in spool chain */ int redir_cnt; /* chain of redir instances */ LIST_HEAD(redir_chain, cfg_redir) redir_chain; }; #endif #define SOF_NAT sizeof(struct cfg_nat) #define SOF_REDIR sizeof(struct cfg_redir) #define SOF_SPOOL sizeof(struct cfg_spool) /* Nat command. */ typedef struct _ipfw_insn_nat { ipfw_insn o; struct cfg_nat *nat; } ipfw_insn_nat; /* Apply ipv6 mask on ipv6 addr */ #define APPLY_MASK(addr,mask) \ (addr)->__u6_addr.__u6_addr32[0] &= (mask)->__u6_addr.__u6_addr32[0]; \ (addr)->__u6_addr.__u6_addr32[1] &= (mask)->__u6_addr.__u6_addr32[1]; \ (addr)->__u6_addr.__u6_addr32[2] &= (mask)->__u6_addr.__u6_addr32[2]; \ (addr)->__u6_addr.__u6_addr32[3] &= (mask)->__u6_addr.__u6_addr32[3]; /* Structure for ipv6 */ typedef struct _ipfw_insn_ip6 { ipfw_insn o; struct in6_addr addr6; struct in6_addr mask6; } ipfw_insn_ip6; /* Used to support icmp6 types */ typedef struct _ipfw_insn_icmp6 { ipfw_insn o; uint32_t d[7]; /* XXX This number si related to the netinet/icmp6.h * define ICMP6_MAXTYPE * as follows: n = ICMP6_MAXTYPE/32 + 1 * Actually is 203 */ } ipfw_insn_icmp6; /* * Here we have the structure representing an ipfw rule. * * Layout: * struct ip_fw_rule * [ counter block, size = rule->cntr_len ] * [ one or more instructions, size = rule->cmd_len * 4 ] * * It starts with a general area (with link fields). * Counter block may be next (if rule->cntr_len > 0), * followed by an array of one or more instructions, which the code * accesses as an array of 32-bit values. rule->cmd_len represents * the total instructions legth in u32 worrd, while act_ofs represents * rule action offset in u32 words. * * When assembling instruction, remember the following: * * + if a rule has a "keep-state" (or "limit") option, then the * first instruction (at r->cmd) MUST BE an O_PROBE_STATE * + if a rule has a "log" option, then the first action * (at ACTION_PTR(r)) MUST be O_LOG * + if a rule has an "altq" option, it comes after "log" * + if a rule has an O_TAG option, it comes after "log" and "altq" * * * All structures (excluding instructions) are u64-aligned. * Please keep this. */ struct ip_fw_rule { uint16_t act_ofs; /* offset of action in 32-bit units */ uint16_t cmd_len; /* # of 32-bit words in cmd */ uint16_t spare; uint8_t set; /* rule set (0..31) */ uint8_t flags; /* rule flags */ uint32_t rulenum; /* rule number */ uint32_t id; /* rule id */ ipfw_insn cmd[1]; /* storage for commands */ }; #define IPFW_RULE_NOOPT 0x01 /* Has no options in body */ /* Unaligned version */ /* Base ipfw rule counter block. */ struct ip_fw_bcounter { uint16_t size; /* Size of counter block, bytes */ uint8_t flags; /* flags for given block */ uint8_t spare; uint32_t timestamp; /* tv_sec of last match */ uint64_t pcnt; /* Packet counter */ uint64_t bcnt; /* Byte counter */ }; #ifndef _KERNEL /* * Legacy rule format */ struct ip_fw { struct ip_fw *x_next; /* linked list of rules */ struct ip_fw *next_rule; /* ptr to next [skipto] rule */ /* 'next_rule' is used to pass up 'set_disable' status */ uint16_t act_ofs; /* offset of action in 32-bit units */ uint16_t cmd_len; /* # of 32-bit words in cmd */ uint16_t rulenum; /* rule number */ uint8_t set; /* rule set (0..31) */ uint8_t _pad; /* padding */ uint32_t id; /* rule id */ /* These fields are present in all rules. */ uint64_t pcnt; /* Packet counter */ uint64_t bcnt; /* Byte counter */ uint32_t timestamp; /* tv_sec of last match */ ipfw_insn cmd[1]; /* storage for commands */ }; #endif #define ACTION_PTR(rule) \ (ipfw_insn *)( (u_int32_t *)((rule)->cmd) + ((rule)->act_ofs) ) #define RULESIZE(rule) (sizeof(*(rule)) + (rule)->cmd_len * 4 - 4) #if 1 // should be moved to in.h /* * This structure is used as a flow mask and a flow id for various * parts of the code. * addr_type is used in userland and kernel to mark the address type. * fib is used in the kernel to record the fib in use. * _flags is used in the kernel to store tcp flags for dynamic rules. */ struct ipfw_flow_id { uint32_t dst_ip; uint32_t src_ip; uint16_t dst_port; uint16_t src_port; uint8_t fib; uint8_t proto; uint8_t _flags; /* protocol-specific flags */ uint8_t addr_type; /* 4=ip4, 6=ip6, 1=ether ? */ struct in6_addr dst_ip6; struct in6_addr src_ip6; uint32_t flow_id6; uint32_t extra; /* queue/pipe or frag_id */ }; #endif #define IS_IP6_FLOW_ID(id) ((id)->addr_type == 6) /* * Dynamic ipfw rule. */ typedef struct _ipfw_dyn_rule ipfw_dyn_rule; struct _ipfw_dyn_rule { ipfw_dyn_rule *next; /* linked list of rules. */ struct ip_fw *rule; /* pointer to rule */ /* 'rule' is used to pass up the rule number (from the parent) */ ipfw_dyn_rule *parent; /* pointer to parent rule */ u_int64_t pcnt; /* packet match counter */ u_int64_t bcnt; /* byte match counter */ struct ipfw_flow_id id; /* (masked) flow id */ u_int32_t expire; /* expire time */ u_int32_t bucket; /* which bucket in hash table */ u_int32_t state; /* state of this rule (typically a * combination of TCP flags) */ u_int32_t ack_fwd; /* most recent ACKs in forward */ u_int32_t ack_rev; /* and reverse directions (used */ /* to generate keepalives) */ u_int16_t dyn_type; /* rule type */ u_int16_t count; /* refcount */ }; /* * Definitions for IP option names. */ #define IP_FW_IPOPT_LSRR 0x01 #define IP_FW_IPOPT_SSRR 0x02 #define IP_FW_IPOPT_RR 0x04 #define IP_FW_IPOPT_TS 0x08 /* * Definitions for TCP option names. */ #define IP_FW_TCPOPT_MSS 0x01 #define IP_FW_TCPOPT_WINDOW 0x02 #define IP_FW_TCPOPT_SACK 0x04 #define IP_FW_TCPOPT_TS 0x08 #define IP_FW_TCPOPT_CC 0x10 #define ICMP_REJECT_RST 0x100 /* fake ICMP code (send a TCP RST) */ #define ICMP6_UNREACH_RST 0x100 /* fake ICMPv6 code (send a TCP RST) */ /* * These are used for lookup tables. */ #define IPFW_TABLE_CIDR 1 /* Table for holding IPv4/IPv6 prefixes */ #define IPFW_TABLE_INTERFACE 2 /* Table for holding interface names */ #define IPFW_TABLE_NUMBER 3 /* Table for holding ports/uid/gid/etc */ #define IPFW_TABLE_FLOW 4 /* Table for holding flow data */ #define IPFW_TABLE_MAXTYPE 4 /* Maximum valid number */ /* Value types */ #define IPFW_VTYPE_U32 1 /* Skipto/tablearg integer */ /* Value format types */ #define IPFW_VFTYPE_U32 0 /* Skipto/tablearg integer */ #define IPFW_VFTYPE_IP 1 /* Nexthop IP address */ typedef struct _ipfw_table_entry { in_addr_t addr; /* network address */ u_int32_t value; /* value */ u_int16_t tbl; /* table number */ u_int8_t masklen; /* mask length */ } ipfw_table_entry; typedef struct _ipfw_table_xentry { uint16_t len; /* Total entry length */ uint8_t type; /* entry type */ uint8_t masklen; /* mask length */ uint16_t tbl; /* table number */ uint16_t flags; /* record flags */ uint32_t value; /* value */ union { /* Longest field needs to be aligned by 4-byte boundary */ struct in6_addr addr6; /* IPv6 address */ char iface[IF_NAMESIZE]; /* interface name */ } k; } ipfw_table_xentry; #define IPFW_TCF_INET 0x01 /* CIDR flags: IPv4 record */ typedef struct _ipfw_table { u_int32_t size; /* size of entries in bytes */ u_int32_t cnt; /* # of entries */ u_int16_t tbl; /* table number */ ipfw_table_entry ent[0]; /* entries */ } ipfw_table; typedef struct _ipfw_xtable { ip_fw3_opheader opheader; /* IP_FW3 opcode */ uint32_t size; /* size of entries in bytes */ uint32_t cnt; /* # of entries */ uint16_t tbl; /* table number */ uint8_t type; /* table type */ ipfw_table_xentry xent[0]; /* entries */ } ipfw_xtable; typedef struct _ipfw_obj_tlv { uint16_t type; /* TLV type */ uint16_t flags; /* TLV-specific flags */ uint32_t length; /* Total length, aligned to u64 */ } ipfw_obj_tlv; #define IPFW_TLV_TBL_NAME 1 #define IPFW_TLV_TBLNAME_LIST 2 #define IPFW_TLV_RULE_LIST 3 #define IPFW_TLV_DYNSTATE_LIST 4 #define IPFW_TLV_TBL_ENT 5 #define IPFW_TLV_DYN_ENT 6 #define IPFW_TLV_RULE_ENT 7 #define IPFW_TLV_TBLENT_LIST 8 #define IPFW_TLV_RANGE 9 /* Object name TLV */ typedef struct _ipfw_obj_ntlv { ipfw_obj_tlv head; /* TLV header */ uint16_t idx; /* Name index */ uint8_t spare; /* unused */ uint8_t type; /* object type, if applicable */ uint32_t set; /* set, if applicable */ char name[64]; /* Null-terminated name */ } ipfw_obj_ntlv; /* IPv4/IPv6 L4 flow description */ struct tflow_entry { uint8_t af; uint8_t proto; uint16_t spare; uint16_t sport; uint16_t dport; union { struct { struct in_addr sip; struct in_addr dip; } a4; struct { struct in6_addr sip6; struct in6_addr dip6; } a6; } a; }; /* Table entry TLV */ typedef struct _ipfw_obj_tentry { ipfw_obj_tlv head; /* TLV header */ uint8_t subtype; /* subtype (IPv4,IPv6) */ uint8_t masklen; /* mask length */ uint16_t idx; /* Table name index */ uint32_t value; /* value */ uint8_t result; /* request result */ uint8_t spare0; uint16_t spare1; uint32_t spare2; union { /* Longest field needs to be aligned by 8-byte boundary */ struct in_addr addr; /* IPv4 address */ uint32_t key; /* uid/gid/port */ struct in6_addr addr6; /* IPv6 address */ char iface[IF_NAMESIZE]; /* interface name */ struct tflow_entry flow; } k; } ipfw_obj_tentry; #define IPFW_TF_UPDATE 0x01 /* Update record if exists */ /* Container TLV */ #define IPFW_CTF_ATOMIC 0x01 /* Perform atomic operation */ /* Operation results */ #define IPFW_TR_IGNORED 0 /* Entry was ignored (rollback) */ #define IPFW_TR_ADDED 1 /* Entry was succesfully added */ #define IPFW_TR_UPDATED 2 /* Entry was succesfully updated*/ #define IPFW_TR_DELETED 3 /* Entry was succesfully deleted*/ #define IPFW_TR_LIMIT 4 /* Entry was ignored (limit) */ #define IPFW_TR_NOTFOUND 5 /* Entry was not found */ #define IPFW_TR_EXISTS 6 /* Entry already exists */ #define IPFW_TR_ERROR 7 /* Request has failed (unknown) */ typedef struct _ipfw_obj_dyntlv { ipfw_obj_tlv head; ipfw_dyn_rule state; } ipfw_obj_dyntlv; #define IPFW_DF_LAST 0x01 /* Last state in chain */ /* Containter TLVs */ typedef struct _ipfw_obj_ctlv { ipfw_obj_tlv head; /* TLV header */ uint32_t count; /* Number of sub-TLVs */ uint16_t objsize; /* Single object size */ uint8_t version; /* TLV version */ uint8_t flags; /* TLV-specific flags */ } ipfw_obj_ctlv; /* Range TLV */ typedef struct _ipfw_range_tlv { ipfw_obj_tlv head; /* TLV header */ uint32_t flags; /* Range flags */ uint16_t start_rule; /* Range start */ uint16_t end_rule; /* Range end */ uint32_t set; /* Range set to match */ uint32_t new_set; /* New set to move/swap to */ } ipfw_range_tlv; #define IPFW_RCFLAG_RANGE 0x01 /* rule range is set */ #define IPFW_RCFLAG_ALL 0x02 /* match ALL rules */ #define IPFW_RCFLAG_SET 0x04 /* match rules in given set */ typedef struct _ipfw_ta_tinfo { uint32_t flags; /* Format flags */ uint32_t spare; uint8_t taclass4; /* algorithm class */ uint8_t spare4; uint16_t itemsize4; /* item size in runtime */ uint32_t size4; /* runtime structure size */ uint32_t count4; /* number of items in runtime */ uint8_t taclass6; /* algorithm class */ uint8_t spare6; uint16_t itemsize6; /* item size in runtime */ uint32_t size6; /* runtime structure size */ uint32_t count6; /* number of items in runtime */ } ipfw_ta_tinfo; #define IPFW_TACLASS_HASH 1 /* algo is based on hash */ #define IPFW_TACLASS_ARRAY 2 /* algo is based on array */ #define IPFW_TACLASS_RADIX 3 /* algo is based on radix tree */ #define IPFW_TATFLAGS_DATA 0x0001 /* Has data filled in */ #define IPFW_TATFLAGS_AFDATA 0x0002 /* Separate data per AF */ #define IPFW_TATFLAGS_AFITEM 0x0004 /* diff. items per AF */ typedef struct _ipfw_xtable_info { uint8_t type; /* table type (cidr,iface,..) */ uint8_t tflags; /* type flags */ uint8_t vtype; /* value type (u32) */ uint8_t vftype; /* value format type (ip,number)*/ uint16_t mflags; /* modification flags */ uint16_t flags; /* generic table flags */ uint32_t set; /* set table is in */ uint32_t kidx; /* kernel index */ uint32_t refcnt; /* number of references */ uint32_t count; /* Number of records */ uint32_t size; /* Total size of records(export)*/ uint32_t limit; /* Max number of records */ char tablename[64]; /* table name */ char algoname[64]; /* algorithm name */ ipfw_ta_tinfo ta_info; /* additional algo stats */ } ipfw_xtable_info; /* Generic table flags */ #define IPFW_TGFLAGS_LOCKED 0x01 /* Tables is locked from changes*/ /* Table type-specific flags */ #define IPFW_TFFLAG_SRCIP 0x01 #define IPFW_TFFLAG_DSTIP 0x02 #define IPFW_TFFLAG_SRCPORT 0x04 #define IPFW_TFFLAG_DSTPORT 0x08 #define IPFW_TFFLAG_PROTO 0x10 /* Table modification flags */ #define IPFW_TMFLAGS_FTYPE 0x0001 /* Change ftype field */ #define IPFW_TMFLAGS_LIMIT 0x0002 /* Change limit value */ #define IPFW_TMFLAGS_LOCK 0x0004 /* Change table lock state */ typedef struct _ipfw_iface_info { char ifname[64]; /* interface name */ uint32_t ifindex; /* interface index */ uint32_t flags; /* flags */ uint32_t refcnt; /* number of references */ uint32_t gencnt; /* number of changes */ uint64_t spare; } ipfw_iface_info; #define IPFW_IFFLAG_RESOLVED 0x01 /* Interface exists */ typedef struct _ipfw_ta_info { char algoname[64]; /* algorithm name */ uint32_t type; /* lookup type */ uint32_t flags; uint32_t refcnt; uint32_t spare0; uint64_t spare1; } ipfw_ta_info; #define IPFW_OBJTYPE_TABLE 1 typedef struct _ipfw_obj_header { ip_fw3_opheader opheader; /* IP_FW3 opcode */ uint32_t spare; uint16_t idx; /* object name index */ uint8_t objtype; /* object type */ uint8_t objsubtype; /* object subtype */ ipfw_obj_ntlv ntlv; /* object name tlv */ } ipfw_obj_header; typedef struct _ipfw_obj_lheader { ip_fw3_opheader opheader; /* IP_FW3 opcode */ uint32_t set_mask; /* disabled set mask */ uint32_t count; /* Total objects count */ uint32_t size; /* Total size (incl. header) */ uint32_t objsize; /* Size of one object */ } ipfw_obj_lheader; #define IPFW_CFG_GET_STATIC 0x01 #define IPFW_CFG_GET_STATES 0x02 #define IPFW_CFG_GET_COUNTERS 0x04 typedef struct _ipfw_cfg_lheader { ip_fw3_opheader opheader; /* IP_FW3 opcode */ uint32_t set_mask; /* enabled set mask */ uint32_t spare; uint32_t flags; /* Request flags */ uint32_t size; /* neded buffer size */ uint32_t start_rule; uint32_t end_rule; } ipfw_cfg_lheader; typedef struct _ipfw_range_header { ip_fw3_opheader opheader; /* IP_FW3 opcode */ ipfw_range_tlv range; } ipfw_range_header; #endif /* _IPFW2_H */