bdf942c3f0
Cleaner solution (e.g. adding another header) should be done here. Original log: Move several enums and structures required for L2 filtering from ip_fw_private.h to ip_fw.h. Remove ipfw/ip_fw_private.h header from non-ipfw code. Requested by: luigi Approved by: kib(mentor)
314 lines
10 KiB
C
314 lines
10 KiB
C
/*-
|
|
* 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_PRIVATE_H
|
|
#define _IPFW2_PRIVATE_H
|
|
|
|
/*
|
|
* Internal constants and data structures used by ipfw components
|
|
* and not meant to be exported outside the kernel.
|
|
*/
|
|
|
|
#ifdef _KERNEL
|
|
|
|
/*
|
|
* For platforms that do not have SYSCTL support, we wrap the
|
|
* SYSCTL_* into a function (one per file) to collect the values
|
|
* into an array at module initialization. The wrapping macros,
|
|
* SYSBEGIN() and SYSEND, are empty in the default case.
|
|
*/
|
|
#ifndef SYSBEGIN
|
|
#define SYSBEGIN(x)
|
|
#endif
|
|
#ifndef SYSEND
|
|
#define SYSEND
|
|
#endif
|
|
|
|
/* Return values from ipfw_chk() */
|
|
enum {
|
|
IP_FW_PASS = 0,
|
|
IP_FW_DENY,
|
|
IP_FW_DIVERT,
|
|
IP_FW_TEE,
|
|
IP_FW_DUMMYNET,
|
|
IP_FW_NETGRAPH,
|
|
IP_FW_NGTEE,
|
|
IP_FW_NAT,
|
|
IP_FW_REASS,
|
|
};
|
|
|
|
/*
|
|
* Structure for collecting parameters to dummynet for ip6_output forwarding
|
|
*/
|
|
struct _ip6dn_args {
|
|
struct ip6_pktopts *opt_or;
|
|
struct route_in6 ro_or;
|
|
int flags_or;
|
|
struct ip6_moptions *im6o_or;
|
|
struct ifnet *origifp_or;
|
|
struct ifnet *ifp_or;
|
|
struct sockaddr_in6 dst_or;
|
|
u_long mtu_or;
|
|
struct route_in6 ro_pmtu_or;
|
|
};
|
|
|
|
|
|
/*
|
|
* Arguments for calling ipfw_chk() and dummynet_io(). We put them
|
|
* all into a structure because this way it is easier and more
|
|
* efficient to pass variables around and extend the interface.
|
|
*/
|
|
struct ip_fw_args {
|
|
struct mbuf *m; /* the mbuf chain */
|
|
struct ifnet *oif; /* output interface */
|
|
struct sockaddr_in *next_hop; /* forward address */
|
|
struct sockaddr_in6 *next_hop6; /* ipv6 forward address */
|
|
|
|
/*
|
|
* On return, it points to the matching rule.
|
|
* On entry, rule.slot > 0 means the info is valid and
|
|
* contains the starting rule for an ipfw search.
|
|
* If chain_id == chain->id && slot >0 then jump to that slot.
|
|
* Otherwise, we locate the first rule >= rulenum:rule_id
|
|
*/
|
|
struct ipfw_rule_ref rule; /* match/restart info */
|
|
|
|
struct ether_header *eh; /* for bridged packets */
|
|
|
|
struct ipfw_flow_id f_id; /* grabbed from IP header */
|
|
//uint32_t cookie; /* a cookie depending on rule action */
|
|
struct inpcb *inp;
|
|
|
|
struct _ip6dn_args dummypar; /* dummynet->ip6_output */
|
|
struct sockaddr_in hopstore; /* store here if cannot use a pointer */
|
|
};
|
|
|
|
MALLOC_DECLARE(M_IPFW);
|
|
|
|
/*
|
|
* Hooks sometime need to know the direction of the packet
|
|
* (divert, dummynet, netgraph, ...)
|
|
* We use a generic definition here, with bit0-1 indicating the
|
|
* direction, bit 2 indicating layer2 or 3, bit 3-4 indicating the
|
|
* specific protocol
|
|
* indicating the protocol (if necessary)
|
|
*/
|
|
enum {
|
|
DIR_MASK = 0x3,
|
|
DIR_OUT = 0,
|
|
DIR_IN = 1,
|
|
DIR_FWD = 2,
|
|
DIR_DROP = 3,
|
|
PROTO_LAYER2 = 0x4, /* set for layer 2 */
|
|
/* PROTO_DEFAULT = 0, */
|
|
PROTO_IPV4 = 0x08,
|
|
PROTO_IPV6 = 0x10,
|
|
PROTO_IFB = 0x0c, /* layer2 + ifbridge */
|
|
/* PROTO_OLDBDG = 0x14, unused, old bridge */
|
|
};
|
|
|
|
/* wrapper for freeing a packet, in case we need to do more work */
|
|
#ifndef FREE_PKT
|
|
#if defined(__linux__) || defined(_WIN32)
|
|
#define FREE_PKT(m) netisr_dispatch(-1, m)
|
|
#else
|
|
#define FREE_PKT(m) m_freem(m)
|
|
#endif
|
|
#endif /* !FREE_PKT */
|
|
|
|
/*
|
|
* Function definitions.
|
|
*/
|
|
|
|
/* attach (arg = 1) or detach (arg = 0) hooks */
|
|
int ipfw_attach_hooks(int);
|
|
#ifdef NOTYET
|
|
void ipfw_nat_destroy(void);
|
|
#endif
|
|
|
|
/* In ip_fw_log.c */
|
|
struct ip;
|
|
void ipfw_log_bpf(int);
|
|
void ipfw_log(struct ip_fw *f, u_int hlen, struct ip_fw_args *args,
|
|
struct mbuf *m, struct ifnet *oif, u_short offset, uint32_t tablearg,
|
|
struct ip *ip);
|
|
VNET_DECLARE(u_int64_t, norule_counter);
|
|
#define V_norule_counter VNET(norule_counter)
|
|
VNET_DECLARE(int, verbose_limit);
|
|
#define V_verbose_limit VNET(verbose_limit)
|
|
|
|
/* In ip_fw_dynamic.c */
|
|
|
|
enum { /* result for matching dynamic rules */
|
|
MATCH_REVERSE = 0,
|
|
MATCH_FORWARD,
|
|
MATCH_NONE,
|
|
MATCH_UNKNOWN,
|
|
};
|
|
|
|
/*
|
|
* The lock for dynamic rules is only used once outside the file,
|
|
* and only to release the result of lookup_dyn_rule().
|
|
* Eventually we may implement it with a callback on the function.
|
|
*/
|
|
void ipfw_dyn_unlock(void);
|
|
|
|
struct tcphdr;
|
|
struct mbuf *ipfw_send_pkt(struct mbuf *, struct ipfw_flow_id *,
|
|
u_int32_t, u_int32_t, int);
|
|
int ipfw_install_state(struct ip_fw *rule, ipfw_insn_limit *cmd,
|
|
struct ip_fw_args *args, uint32_t tablearg);
|
|
ipfw_dyn_rule *ipfw_lookup_dyn_rule(struct ipfw_flow_id *pkt,
|
|
int *match_direction, struct tcphdr *tcp);
|
|
void ipfw_remove_dyn_children(struct ip_fw *rule);
|
|
void ipfw_get_dynamic(char **bp, const char *ep);
|
|
|
|
void ipfw_dyn_attach(void); /* uma_zcreate .... */
|
|
void ipfw_dyn_detach(void); /* uma_zdestroy ... */
|
|
void ipfw_dyn_init(void); /* per-vnet initialization */
|
|
void ipfw_dyn_uninit(int); /* per-vnet deinitialization */
|
|
int ipfw_dyn_len(void);
|
|
|
|
/* common variables */
|
|
VNET_DECLARE(int, fw_one_pass);
|
|
#define V_fw_one_pass VNET(fw_one_pass)
|
|
|
|
VNET_DECLARE(int, fw_verbose);
|
|
#define V_fw_verbose VNET(fw_verbose)
|
|
|
|
VNET_DECLARE(struct ip_fw_chain, layer3_chain);
|
|
#define V_layer3_chain VNET(layer3_chain)
|
|
|
|
VNET_DECLARE(u_int32_t, set_disable);
|
|
#define V_set_disable VNET(set_disable)
|
|
|
|
VNET_DECLARE(int, autoinc_step);
|
|
#define V_autoinc_step VNET(autoinc_step)
|
|
|
|
VNET_DECLARE(unsigned int, fw_tables_max);
|
|
#define V_fw_tables_max VNET(fw_tables_max)
|
|
|
|
struct ip_fw_chain {
|
|
struct ip_fw *rules; /* list of rules */
|
|
struct ip_fw *reap; /* list of rules to reap */
|
|
struct ip_fw *default_rule;
|
|
int n_rules; /* number of static rules */
|
|
int static_len; /* total len of static rules */
|
|
struct ip_fw **map; /* array of rule ptrs to ease lookup */
|
|
LIST_HEAD(nat_list, cfg_nat) nat; /* list of nat entries */
|
|
struct radix_node_head **tables; /* IPv4 tables */
|
|
struct radix_node_head **xtables; /* extended tables */
|
|
uint8_t *tabletype; /* Array of table types */
|
|
#if defined( __linux__ ) || defined( _WIN32 )
|
|
spinlock_t rwmtx;
|
|
spinlock_t uh_lock;
|
|
#else
|
|
struct rwlock rwmtx;
|
|
struct rwlock uh_lock; /* lock for upper half */
|
|
#endif
|
|
uint32_t id; /* ruleset id */
|
|
uint32_t gencnt; /* generation count */
|
|
};
|
|
|
|
struct sockopt; /* used by tcp_var.h */
|
|
|
|
/*
|
|
* The lock is heavily used by ip_fw2.c (the main file) and ip_fw_nat.c
|
|
* so the variable and the macros must be here.
|
|
*/
|
|
|
|
#define IPFW_LOCK_INIT(_chain) do { \
|
|
rw_init(&(_chain)->rwmtx, "IPFW static rules"); \
|
|
rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \
|
|
} while (0)
|
|
|
|
#define IPFW_LOCK_DESTROY(_chain) do { \
|
|
rw_destroy(&(_chain)->rwmtx); \
|
|
rw_destroy(&(_chain)->uh_lock); \
|
|
} while (0)
|
|
|
|
#define IPFW_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_WLOCKED)
|
|
|
|
#define IPFW_RLOCK(p) rw_rlock(&(p)->rwmtx)
|
|
#define IPFW_RUNLOCK(p) rw_runlock(&(p)->rwmtx)
|
|
#define IPFW_WLOCK(p) rw_wlock(&(p)->rwmtx)
|
|
#define IPFW_WUNLOCK(p) rw_wunlock(&(p)->rwmtx)
|
|
|
|
#define IPFW_UH_RLOCK(p) rw_rlock(&(p)->uh_lock)
|
|
#define IPFW_UH_RUNLOCK(p) rw_runlock(&(p)->uh_lock)
|
|
#define IPFW_UH_WLOCK(p) rw_wlock(&(p)->uh_lock)
|
|
#define IPFW_UH_WUNLOCK(p) rw_wunlock(&(p)->uh_lock)
|
|
|
|
/* In ip_fw_sockopt.c */
|
|
int ipfw_find_rule(struct ip_fw_chain *chain, uint32_t key, uint32_t id);
|
|
int ipfw_add_rule(struct ip_fw_chain *chain, struct ip_fw *input_rule);
|
|
int ipfw_ctl(struct sockopt *sopt);
|
|
int ipfw_chk(struct ip_fw_args *args);
|
|
void ipfw_reap_rules(struct ip_fw *head);
|
|
|
|
/* In ip_fw_pfil */
|
|
int ipfw_check_hook(void *arg, struct mbuf **m0, struct ifnet *ifp, int dir,
|
|
struct inpcb *inp);
|
|
|
|
/* In ip_fw_table.c */
|
|
struct radix_node;
|
|
int ipfw_lookup_table(struct ip_fw_chain *ch, uint16_t tbl, in_addr_t addr,
|
|
uint32_t *val);
|
|
int ipfw_lookup_table_extended(struct ip_fw_chain *ch, uint16_t tbl, void *paddr,
|
|
uint32_t *val, int type);
|
|
int ipfw_init_tables(struct ip_fw_chain *ch);
|
|
void ipfw_destroy_tables(struct ip_fw_chain *ch);
|
|
int ipfw_flush_table(struct ip_fw_chain *ch, uint16_t tbl);
|
|
int ipfw_add_table_entry(struct ip_fw_chain *ch, uint16_t tbl, void *paddr,
|
|
uint8_t plen, uint8_t mlen, uint8_t type, uint32_t value);
|
|
int ipfw_del_table_entry(struct ip_fw_chain *ch, uint16_t tbl, void *paddr,
|
|
uint8_t plen, uint8_t mlen, uint8_t type);
|
|
int ipfw_count_table(struct ip_fw_chain *ch, uint32_t tbl, uint32_t *cnt);
|
|
int ipfw_dump_table_entry(struct radix_node *rn, void *arg);
|
|
int ipfw_dump_table(struct ip_fw_chain *ch, ipfw_table *tbl);
|
|
int ipfw_count_xtable(struct ip_fw_chain *ch, uint32_t tbl, uint32_t *cnt);
|
|
int ipfw_dump_xtable(struct ip_fw_chain *ch, ipfw_xtable *tbl);
|
|
int ipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables);
|
|
|
|
/* In ip_fw_nat.c -- XXX to be moved to ip_var.h */
|
|
|
|
extern struct cfg_nat *(*lookup_nat_ptr)(struct nat_list *, int);
|
|
|
|
typedef int ipfw_nat_t(struct ip_fw_args *, struct cfg_nat *, struct mbuf *);
|
|
typedef int ipfw_nat_cfg_t(struct sockopt *);
|
|
|
|
extern ipfw_nat_t *ipfw_nat_ptr;
|
|
#define IPFW_NAT_LOADED (ipfw_nat_ptr != NULL)
|
|
|
|
extern ipfw_nat_cfg_t *ipfw_nat_cfg_ptr;
|
|
extern ipfw_nat_cfg_t *ipfw_nat_del_ptr;
|
|
extern ipfw_nat_cfg_t *ipfw_nat_get_cfg_ptr;
|
|
extern ipfw_nat_cfg_t *ipfw_nat_get_log_ptr;
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _IPFW2_PRIVATE_H */
|