747 lines
24 KiB
C
747 lines
24 KiB
C
/*-
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* Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _IPFW2_PRIVATE_H
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#define _IPFW2_PRIVATE_H
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/*
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* Internal constants and data structures used by ipfw components
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* and not meant to be exported outside the kernel.
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*/
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#ifdef _KERNEL
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/*
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* For platforms that do not have SYSCTL support, we wrap the
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* SYSCTL_* into a function (one per file) to collect the values
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* into an array at module initialization. The wrapping macros,
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* SYSBEGIN() and SYSEND, are empty in the default case.
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*/
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#ifndef SYSBEGIN
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#define SYSBEGIN(x)
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#endif
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#ifndef SYSEND
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#define SYSEND
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#endif
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/* Return values from ipfw_chk() */
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enum {
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IP_FW_PASS = 0,
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IP_FW_DENY,
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IP_FW_DIVERT,
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IP_FW_TEE,
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IP_FW_DUMMYNET,
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IP_FW_NETGRAPH,
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IP_FW_NGTEE,
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IP_FW_NAT,
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IP_FW_REASS,
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};
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/*
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* Structure for collecting parameters to dummynet for ip6_output forwarding
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*/
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struct _ip6dn_args {
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struct ip6_pktopts *opt_or;
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int flags_or;
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struct ip6_moptions *im6o_or;
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struct ifnet *origifp_or;
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struct ifnet *ifp_or;
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struct sockaddr_in6 dst_or;
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u_long mtu_or;
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};
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/*
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* Arguments for calling ipfw_chk() and dummynet_io(). We put them
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* all into a structure because this way it is easier and more
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* efficient to pass variables around and extend the interface.
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*/
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struct ip_fw_args {
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struct mbuf *m; /* the mbuf chain */
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struct ifnet *oif; /* output interface */
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struct sockaddr_in *next_hop; /* forward address */
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struct sockaddr_in6 *next_hop6; /* ipv6 forward address */
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/*
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* On return, it points to the matching rule.
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* On entry, rule.slot > 0 means the info is valid and
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* contains the starting rule for an ipfw search.
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* If chain_id == chain->id && slot >0 then jump to that slot.
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* Otherwise, we locate the first rule >= rulenum:rule_id
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*/
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struct ipfw_rule_ref rule; /* match/restart info */
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struct ether_header *eh; /* for bridged packets */
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struct ipfw_flow_id f_id; /* grabbed from IP header */
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//uint32_t cookie; /* a cookie depending on rule action */
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struct inpcb *inp;
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struct _ip6dn_args dummypar; /* dummynet->ip6_output */
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union { /* store here if cannot use a pointer */
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struct sockaddr_in hopstore;
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struct sockaddr_in6 hopstore6;
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};
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};
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MALLOC_DECLARE(M_IPFW);
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/*
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* Hooks sometime need to know the direction of the packet
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* (divert, dummynet, netgraph, ...)
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* We use a generic definition here, with bit0-1 indicating the
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* direction, bit 2 indicating layer2 or 3, bit 3-4 indicating the
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* specific protocol
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* indicating the protocol (if necessary)
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*/
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enum {
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DIR_MASK = 0x3,
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DIR_OUT = 0,
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DIR_IN = 1,
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DIR_FWD = 2,
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DIR_DROP = 3,
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PROTO_LAYER2 = 0x4, /* set for layer 2 */
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/* PROTO_DEFAULT = 0, */
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PROTO_IPV4 = 0x08,
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PROTO_IPV6 = 0x10,
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PROTO_IFB = 0x0c, /* layer2 + ifbridge */
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/* PROTO_OLDBDG = 0x14, unused, old bridge */
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};
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/* wrapper for freeing a packet, in case we need to do more work */
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#ifndef FREE_PKT
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#if defined(__linux__) || defined(_WIN32)
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#define FREE_PKT(m) netisr_dispatch(-1, m)
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#else
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#define FREE_PKT(m) m_freem(m)
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#endif
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#endif /* !FREE_PKT */
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/*
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* Function definitions.
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*/
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/* attach (arg = 1) or detach (arg = 0) hooks */
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int ipfw_attach_hooks(int);
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#ifdef NOTYET
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void ipfw_nat_destroy(void);
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#endif
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/* In ip_fw_log.c */
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struct ip;
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struct ip_fw_chain;
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void ipfw_log_bpf(int);
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void ipfw_log(struct ip_fw_chain *chain, struct ip_fw *f, u_int hlen,
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struct ip_fw_args *args, struct mbuf *m, struct ifnet *oif,
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u_short offset, uint32_t tablearg, struct ip *ip);
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VNET_DECLARE(u_int64_t, norule_counter);
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#define V_norule_counter VNET(norule_counter)
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VNET_DECLARE(int, verbose_limit);
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#define V_verbose_limit VNET(verbose_limit)
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/* In ip_fw_dynamic.c */
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enum { /* result for matching dynamic rules */
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MATCH_REVERSE = 0,
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MATCH_FORWARD,
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MATCH_NONE,
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MATCH_UNKNOWN,
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};
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/*
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* The lock for dynamic rules is only used once outside the file,
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* and only to release the result of lookup_dyn_rule().
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* Eventually we may implement it with a callback on the function.
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*/
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struct ip_fw_chain;
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struct sockopt_data;
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int ipfw_is_dyn_rule(struct ip_fw *rule);
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void ipfw_expire_dyn_rules(struct ip_fw_chain *, ipfw_range_tlv *);
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void ipfw_dyn_unlock(ipfw_dyn_rule *q);
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struct tcphdr;
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struct mbuf *ipfw_send_pkt(struct mbuf *, struct ipfw_flow_id *,
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u_int32_t, u_int32_t, int);
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int ipfw_install_state(struct ip_fw_chain *chain, struct ip_fw *rule,
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ipfw_insn_limit *cmd, struct ip_fw_args *args, uint32_t tablearg);
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ipfw_dyn_rule *ipfw_lookup_dyn_rule(struct ipfw_flow_id *pkt,
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int *match_direction, struct tcphdr *tcp);
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void ipfw_remove_dyn_children(struct ip_fw *rule);
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void ipfw_get_dynamic(struct ip_fw_chain *chain, char **bp, const char *ep);
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int ipfw_dump_states(struct ip_fw_chain *chain, struct sockopt_data *sd);
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void ipfw_dyn_init(struct ip_fw_chain *); /* per-vnet initialization */
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void ipfw_dyn_uninit(int); /* per-vnet deinitialization */
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int ipfw_dyn_len(void);
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int ipfw_dyn_get_count(void);
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/* common variables */
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VNET_DECLARE(int, fw_one_pass);
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#define V_fw_one_pass VNET(fw_one_pass)
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VNET_DECLARE(int, fw_verbose);
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#define V_fw_verbose VNET(fw_verbose)
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VNET_DECLARE(struct ip_fw_chain, layer3_chain);
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#define V_layer3_chain VNET(layer3_chain)
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VNET_DECLARE(int, ipfw_vnet_ready);
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#define V_ipfw_vnet_ready VNET(ipfw_vnet_ready)
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VNET_DECLARE(u_int32_t, set_disable);
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#define V_set_disable VNET(set_disable)
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VNET_DECLARE(int, autoinc_step);
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#define V_autoinc_step VNET(autoinc_step)
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VNET_DECLARE(unsigned int, fw_tables_max);
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#define V_fw_tables_max VNET(fw_tables_max)
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VNET_DECLARE(unsigned int, fw_tables_sets);
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#define V_fw_tables_sets VNET(fw_tables_sets)
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struct tables_config;
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#ifdef _KERNEL
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/*
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* Here we have the structure representing an ipfw rule.
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*
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* It starts with a general area
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* followed by an array of one or more instructions, which the code
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* accesses as an array of 32-bit values.
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*
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* Given a rule pointer r:
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*
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* r->cmd is the start of the first instruction.
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* ACTION_PTR(r) is the start of the first action (things to do
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* once a rule matched).
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*/
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struct ip_fw {
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uint16_t act_ofs; /* offset of action in 32-bit units */
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uint16_t cmd_len; /* # of 32-bit words in cmd */
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uint16_t rulenum; /* rule number */
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uint8_t set; /* rule set (0..31) */
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uint8_t flags; /* currently unused */
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counter_u64_t cntr; /* Pointer to rule counters */
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uint32_t timestamp; /* tv_sec of last match */
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uint32_t id; /* rule id */
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uint32_t cached_id; /* used by jump_fast */
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uint32_t cached_pos; /* used by jump_fast */
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ipfw_insn cmd[1]; /* storage for commands */
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};
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#define IPFW_RULE_CNTR_SIZE (2 * sizeof(uint64_t))
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#endif
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struct ip_fw_chain {
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struct ip_fw **map; /* array of rule ptrs to ease lookup */
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uint32_t id; /* ruleset id */
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int n_rules; /* number of static rules */
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void *tablestate; /* runtime table info */
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void *valuestate; /* runtime table value info */
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int *idxmap; /* skipto array of rules */
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void **srvstate; /* runtime service mappings */
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#if defined( __linux__ ) || defined( _WIN32 )
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spinlock_t rwmtx;
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#else
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struct rmlock rwmtx;
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#endif
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int static_len; /* total len of static rules (v0) */
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uint32_t gencnt; /* NAT generation count */
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LIST_HEAD(nat_list, cfg_nat) nat; /* list of nat entries */
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struct ip_fw *default_rule;
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struct tables_config *tblcfg; /* tables module data */
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void *ifcfg; /* interface module data */
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int *idxmap_back; /* standby skipto array of rules */
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struct namedobj_instance *srvmap; /* cfg name->number mappings */
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#if defined( __linux__ ) || defined( _WIN32 )
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spinlock_t uh_lock;
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#else
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struct rwlock uh_lock; /* lock for upper half */
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#endif
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};
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/* 64-byte structure representing multi-field table value */
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struct table_value {
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uint32_t tag; /* O_TAG/O_TAGGED */
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uint32_t pipe; /* O_PIPE/O_QUEUE */
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uint16_t divert; /* O_DIVERT/O_TEE */
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uint16_t skipto; /* skipto, CALLRET */
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uint32_t netgraph; /* O_NETGRAPH/O_NGTEE */
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uint32_t fib; /* O_SETFIB */
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uint32_t nat; /* O_NAT */
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uint32_t nh4;
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uint8_t dscp;
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uint8_t spare0;
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uint16_t spare1;
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/* -- 32 bytes -- */
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struct in6_addr nh6;
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uint32_t limit; /* O_LIMIT */
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uint32_t zoneid; /* scope zone id for nh6 */
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uint64_t refcnt; /* Number of references */
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};
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struct named_object {
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TAILQ_ENTRY(named_object) nn_next; /* namehash */
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TAILQ_ENTRY(named_object) nv_next; /* valuehash */
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char *name; /* object name */
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uint8_t subtype; /* object subtype within class */
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uint8_t etlv; /* Export TLV id */
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uint16_t spare[2];
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uint16_t kidx; /* object kernel index */
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uint32_t set; /* set object belongs to */
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uint32_t refcnt; /* number of references */
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};
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TAILQ_HEAD(namedobjects_head, named_object);
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struct sockopt; /* used by tcp_var.h */
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struct sockopt_data {
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caddr_t kbuf; /* allocated buffer */
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size_t ksize; /* given buffer size */
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size_t koff; /* data already used */
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size_t kavail; /* number of bytes available */
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size_t ktotal; /* total bytes pushed */
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struct sockopt *sopt; /* socket data */
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caddr_t sopt_val; /* sopt user buffer */
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size_t valsize; /* original data size */
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};
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struct ipfw_ifc;
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typedef void (ipfw_ifc_cb)(struct ip_fw_chain *ch, void *cbdata,
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uint16_t ifindex);
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struct ipfw_iface {
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struct named_object no;
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char ifname[64];
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int resolved;
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uint16_t ifindex;
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uint16_t spare;
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uint64_t gencnt;
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TAILQ_HEAD(, ipfw_ifc) consumers;
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};
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struct ipfw_ifc {
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TAILQ_ENTRY(ipfw_ifc) next;
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struct ipfw_iface *iface;
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ipfw_ifc_cb *cb;
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void *cbdata;
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};
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/* Macro for working with various counters */
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#define IPFW_INC_RULE_COUNTER(_cntr, _bytes) do { \
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counter_u64_add((_cntr)->cntr, 1); \
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counter_u64_add((_cntr)->cntr + 1, _bytes); \
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if ((_cntr)->timestamp != time_uptime) \
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(_cntr)->timestamp = time_uptime; \
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} while (0)
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#define IPFW_INC_DYN_COUNTER(_cntr, _bytes) do { \
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(_cntr)->pcnt++; \
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(_cntr)->bcnt += _bytes; \
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} while (0)
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#define IPFW_ZERO_RULE_COUNTER(_cntr) do { \
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counter_u64_zero((_cntr)->cntr); \
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counter_u64_zero((_cntr)->cntr + 1); \
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(_cntr)->timestamp = 0; \
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} while (0)
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#define IPFW_ZERO_DYN_COUNTER(_cntr) do { \
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(_cntr)->pcnt = 0; \
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(_cntr)->bcnt = 0; \
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} while (0)
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#define TARG_VAL(ch, k, f) ((struct table_value *)((ch)->valuestate))[k].f
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#define IP_FW_ARG_TABLEARG(ch, a, f) \
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(((a) == IP_FW_TARG) ? TARG_VAL(ch, tablearg, f) : (a))
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/*
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* The lock is heavily used by ip_fw2.c (the main file) and ip_fw_nat.c
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* so the variable and the macros must be here.
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*/
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#if defined( __linux__ ) || defined( _WIN32 )
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#define IPFW_LOCK_INIT(_chain) do { \
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rw_init(&(_chain)->rwmtx, "IPFW static rules"); \
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rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \
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} while (0)
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#define IPFW_LOCK_DESTROY(_chain) do { \
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rw_destroy(&(_chain)->rwmtx); \
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rw_destroy(&(_chain)->uh_lock); \
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} while (0)
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#define IPFW_RLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_RLOCKED)
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#define IPFW_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->rwmtx, RA_WLOCKED)
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#define IPFW_RLOCK_TRACKER
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#define IPFW_RLOCK(p) rw_rlock(&(p)->rwmtx)
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#define IPFW_RUNLOCK(p) rw_runlock(&(p)->rwmtx)
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#define IPFW_WLOCK(p) rw_wlock(&(p)->rwmtx)
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#define IPFW_WUNLOCK(p) rw_wunlock(&(p)->rwmtx)
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#define IPFW_PF_RLOCK(p) IPFW_RLOCK(p)
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#define IPFW_PF_RUNLOCK(p) IPFW_RUNLOCK(p)
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#else /* FreeBSD */
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#define IPFW_LOCK_INIT(_chain) do { \
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rm_init(&(_chain)->rwmtx, "IPFW static rules"); \
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rw_init(&(_chain)->uh_lock, "IPFW UH lock"); \
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} while (0)
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#define IPFW_LOCK_DESTROY(_chain) do { \
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rm_destroy(&(_chain)->rwmtx); \
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rw_destroy(&(_chain)->uh_lock); \
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} while (0)
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#define IPFW_RLOCK_ASSERT(_chain) rm_assert(&(_chain)->rwmtx, RA_RLOCKED)
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#define IPFW_WLOCK_ASSERT(_chain) rm_assert(&(_chain)->rwmtx, RA_WLOCKED)
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#define IPFW_RLOCK_TRACKER struct rm_priotracker _tracker
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#define IPFW_RLOCK(p) rm_rlock(&(p)->rwmtx, &_tracker)
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#define IPFW_RUNLOCK(p) rm_runlock(&(p)->rwmtx, &_tracker)
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#define IPFW_WLOCK(p) rm_wlock(&(p)->rwmtx)
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#define IPFW_WUNLOCK(p) rm_wunlock(&(p)->rwmtx)
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#define IPFW_PF_RLOCK(p) IPFW_RLOCK(p)
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#define IPFW_PF_RUNLOCK(p) IPFW_RUNLOCK(p)
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#endif
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#define IPFW_UH_RLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_RLOCKED)
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#define IPFW_UH_WLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_WLOCKED)
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#define IPFW_UH_UNLOCK_ASSERT(_chain) rw_assert(&(_chain)->uh_lock, RA_UNLOCKED)
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#define IPFW_UH_RLOCK(p) rw_rlock(&(p)->uh_lock)
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#define IPFW_UH_RUNLOCK(p) rw_runlock(&(p)->uh_lock)
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#define IPFW_UH_WLOCK(p) rw_wlock(&(p)->uh_lock)
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#define IPFW_UH_WUNLOCK(p) rw_wunlock(&(p)->uh_lock)
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struct obj_idx {
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uint16_t uidx; /* internal index supplied by userland */
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uint16_t kidx; /* kernel object index */
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uint16_t off; /* tlv offset from rule end in 4-byte words */
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uint8_t spare;
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uint8_t type; /* object type within its category */
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};
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struct rule_check_info {
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uint16_t flags; /* rule-specific check flags */
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uint16_t object_opcodes; /* num of opcodes referencing objects */
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uint16_t urule_numoff; /* offset of rulenum in bytes */
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uint8_t version; /* rule version */
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uint8_t spare;
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|
ipfw_obj_ctlv *ctlv; /* name TLV containter */
|
|
struct ip_fw *krule; /* resulting rule pointer */
|
|
caddr_t urule; /* original rule pointer */
|
|
struct obj_idx obuf[8]; /* table references storage */
|
|
};
|
|
|
|
/* Legacy interface support */
|
|
/*
|
|
* FreeBSD 8 export rule format
|
|
*/
|
|
struct ip_fw_rule0 {
|
|
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 */
|
|
};
|
|
|
|
struct ip_fw_bcounter0 {
|
|
uint64_t pcnt; /* Packet counter */
|
|
uint64_t bcnt; /* Byte counter */
|
|
uint32_t timestamp; /* tv_sec of last match */
|
|
};
|
|
|
|
/* Kernel rule length */
|
|
/*
|
|
* RULE _K_ SIZE _V_ ->
|
|
* get kernel size from userland rool version _V_.
|
|
* RULE _U_ SIZE _V_ ->
|
|
* get user size version _V_ from kernel rule
|
|
* RULESIZE _V_ ->
|
|
* get user size rule length
|
|
*/
|
|
/* FreeBSD8 <> current kernel format */
|
|
#define RULEUSIZE0(r) (sizeof(struct ip_fw_rule0) + (r)->cmd_len * 4 - 4)
|
|
#define RULEKSIZE0(r) roundup2((sizeof(struct ip_fw) + (r)->cmd_len*4 - 4), 8)
|
|
/* FreeBSD11 <> current kernel format */
|
|
#define RULEUSIZE1(r) (roundup2(sizeof(struct ip_fw_rule) + \
|
|
(r)->cmd_len * 4 - 4, 8))
|
|
#define RULEKSIZE1(r) roundup2((sizeof(struct ip_fw) + (r)->cmd_len*4 - 4), 8)
|
|
|
|
/*
|
|
* Tables/Objects index rewriting code
|
|
*/
|
|
|
|
/* Default and maximum number of ipfw tables/objects. */
|
|
#define IPFW_TABLES_MAX 65536
|
|
#define IPFW_TABLES_DEFAULT 128
|
|
#define IPFW_OBJECTS_MAX 65536
|
|
#define IPFW_OBJECTS_DEFAULT 128
|
|
|
|
#define CHAIN_TO_SRV(ch) ((ch)->srvmap)
|
|
|
|
struct tid_info {
|
|
uint32_t set; /* table set */
|
|
uint16_t uidx; /* table index */
|
|
uint8_t type; /* table type */
|
|
uint8_t atype;
|
|
uint8_t spare;
|
|
int tlen; /* Total TLV size block */
|
|
void *tlvs; /* Pointer to first TLV */
|
|
};
|
|
|
|
/*
|
|
* Classifier callback. Checks if @cmd opcode contains kernel object reference.
|
|
* If true, returns its index and type.
|
|
* Returns 0 if match is found, 1 overwise.
|
|
*/
|
|
typedef int (ipfw_obj_rw_cl)(ipfw_insn *cmd, uint16_t *puidx, uint8_t *ptype);
|
|
/*
|
|
* Updater callback. Sets kernel object reference index to @puidx
|
|
*/
|
|
typedef void (ipfw_obj_rw_upd)(ipfw_insn *cmd, uint16_t puidx);
|
|
/*
|
|
* Finder callback. Tries to find named object by name (specified via @ti).
|
|
* Stores found named object pointer in @pno.
|
|
* If object was not found, NULL is stored.
|
|
*
|
|
* Return 0 if input data was valid.
|
|
*/
|
|
typedef int (ipfw_obj_fname_cb)(struct ip_fw_chain *ch,
|
|
struct tid_info *ti, struct named_object **pno);
|
|
/*
|
|
* Another finder callback. Tries to findex named object by kernel index.
|
|
*
|
|
* Returns pointer to named object or NULL.
|
|
*/
|
|
typedef struct named_object *(ipfw_obj_fidx_cb)(struct ip_fw_chain *ch,
|
|
uint16_t kidx);
|
|
/*
|
|
* Object creator callback. Tries to create object specified by @ti.
|
|
* Stores newly-allocated object index in @pkidx.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
typedef int (ipfw_obj_create_cb)(struct ip_fw_chain *ch, struct tid_info *ti,
|
|
uint16_t *pkidx);
|
|
|
|
|
|
struct opcode_obj_rewrite {
|
|
uint32_t opcode; /* Opcode to act upon */
|
|
uint32_t etlv; /* Relevant export TLV id */
|
|
ipfw_obj_rw_cl *classifier; /* Check if rewrite is needed */
|
|
ipfw_obj_rw_upd *update; /* update cmd with new value */
|
|
ipfw_obj_fname_cb *find_byname; /* Find named object by name */
|
|
ipfw_obj_fidx_cb *find_bykidx; /* Find named object by kidx */
|
|
ipfw_obj_create_cb *create_object; /* Create named object */
|
|
};
|
|
|
|
#define IPFW_ADD_OBJ_REWRITER(f, c) do { \
|
|
if ((f) != 0) \
|
|
ipfw_add_obj_rewriter(c, \
|
|
sizeof(c) / sizeof(c[0])); \
|
|
} while(0)
|
|
#define IPFW_DEL_OBJ_REWRITER(l, c) do { \
|
|
if ((l) != 0) \
|
|
ipfw_del_obj_rewriter(c, \
|
|
sizeof(c) / sizeof(c[0])); \
|
|
} while(0)
|
|
|
|
/* In ip_fw_iface.c */
|
|
int ipfw_iface_init(void);
|
|
void ipfw_iface_destroy(void);
|
|
void vnet_ipfw_iface_destroy(struct ip_fw_chain *ch);
|
|
int ipfw_iface_ref(struct ip_fw_chain *ch, char *name,
|
|
struct ipfw_ifc *ic);
|
|
void ipfw_iface_unref(struct ip_fw_chain *ch, struct ipfw_ifc *ic);
|
|
void ipfw_iface_add_notify(struct ip_fw_chain *ch, struct ipfw_ifc *ic);
|
|
void ipfw_iface_del_notify(struct ip_fw_chain *ch, struct ipfw_ifc *ic);
|
|
|
|
/* In ip_fw_sockopt.c */
|
|
void ipfw_init_skipto_cache(struct ip_fw_chain *chain);
|
|
void ipfw_destroy_skipto_cache(struct ip_fw_chain *chain);
|
|
int ipfw_find_rule(struct ip_fw_chain *chain, uint32_t key, uint32_t id);
|
|
int ipfw_ctl3(struct sockopt *sopt);
|
|
int ipfw_chk(struct ip_fw_args *args);
|
|
void ipfw_reap_add(struct ip_fw_chain *chain, struct ip_fw **head,
|
|
struct ip_fw *rule);
|
|
void ipfw_reap_rules(struct ip_fw *head);
|
|
void ipfw_init_counters(void);
|
|
void ipfw_destroy_counters(void);
|
|
struct ip_fw *ipfw_alloc_rule(struct ip_fw_chain *chain, size_t rulesize);
|
|
int ipfw_match_range(struct ip_fw *rule, ipfw_range_tlv *rt);
|
|
|
|
typedef int (sopt_handler_f)(struct ip_fw_chain *ch,
|
|
ip_fw3_opheader *op3, struct sockopt_data *sd);
|
|
struct ipfw_sopt_handler {
|
|
uint16_t opcode;
|
|
uint8_t version;
|
|
uint8_t dir;
|
|
sopt_handler_f *handler;
|
|
uint64_t refcnt;
|
|
};
|
|
#define HDIR_SET 0x01 /* Handler is used to set some data */
|
|
#define HDIR_GET 0x02 /* Handler is used to retrieve data */
|
|
#define HDIR_BOTH HDIR_GET|HDIR_SET
|
|
|
|
void ipfw_init_sopt_handler(void);
|
|
void ipfw_destroy_sopt_handler(void);
|
|
void ipfw_add_sopt_handler(struct ipfw_sopt_handler *sh, size_t count);
|
|
int ipfw_del_sopt_handler(struct ipfw_sopt_handler *sh, size_t count);
|
|
caddr_t ipfw_get_sopt_space(struct sockopt_data *sd, size_t needed);
|
|
caddr_t ipfw_get_sopt_header(struct sockopt_data *sd, size_t needed);
|
|
#define IPFW_ADD_SOPT_HANDLER(f, c) do { \
|
|
if ((f) != 0) \
|
|
ipfw_add_sopt_handler(c, \
|
|
sizeof(c) / sizeof(c[0])); \
|
|
} while(0)
|
|
#define IPFW_DEL_SOPT_HANDLER(l, c) do { \
|
|
if ((l) != 0) \
|
|
ipfw_del_sopt_handler(c, \
|
|
sizeof(c) / sizeof(c[0])); \
|
|
} while(0)
|
|
|
|
struct namedobj_instance;
|
|
typedef void (objhash_cb_t)(struct namedobj_instance *ni, struct named_object *,
|
|
void *arg);
|
|
typedef uint32_t (objhash_hash_f)(struct namedobj_instance *ni, void *key,
|
|
uint32_t kopt);
|
|
typedef int (objhash_cmp_f)(struct named_object *no, void *key, uint32_t kopt);
|
|
struct namedobj_instance *ipfw_objhash_create(uint32_t items);
|
|
void ipfw_objhash_destroy(struct namedobj_instance *);
|
|
void ipfw_objhash_bitmap_alloc(uint32_t items, void **idx, int *pblocks);
|
|
void ipfw_objhash_bitmap_merge(struct namedobj_instance *ni,
|
|
void **idx, int *blocks);
|
|
void ipfw_objhash_bitmap_swap(struct namedobj_instance *ni,
|
|
void **idx, int *blocks);
|
|
void ipfw_objhash_bitmap_free(void *idx, int blocks);
|
|
void ipfw_objhash_set_hashf(struct namedobj_instance *ni, objhash_hash_f *f);
|
|
struct named_object *ipfw_objhash_lookup_name(struct namedobj_instance *ni,
|
|
uint32_t set, char *name);
|
|
struct named_object *ipfw_objhash_lookup_name_type(struct namedobj_instance *ni,
|
|
uint32_t set, uint32_t type, char *name);
|
|
struct named_object *ipfw_objhash_lookup_kidx(struct namedobj_instance *ni,
|
|
uint16_t idx);
|
|
int ipfw_objhash_same_name(struct namedobj_instance *ni, struct named_object *a,
|
|
struct named_object *b);
|
|
void ipfw_objhash_add(struct namedobj_instance *ni, struct named_object *no);
|
|
void ipfw_objhash_del(struct namedobj_instance *ni, struct named_object *no);
|
|
uint32_t ipfw_objhash_count(struct namedobj_instance *ni);
|
|
void ipfw_objhash_foreach(struct namedobj_instance *ni, objhash_cb_t *f,
|
|
void *arg);
|
|
int ipfw_objhash_free_idx(struct namedobj_instance *ni, uint16_t idx);
|
|
int ipfw_objhash_alloc_idx(void *n, uint16_t *pidx);
|
|
void ipfw_objhash_set_funcs(struct namedobj_instance *ni,
|
|
objhash_hash_f *hash_f, objhash_cmp_f *cmp_f);
|
|
void ipfw_init_obj_rewriter(void);
|
|
void ipfw_destroy_obj_rewriter(void);
|
|
void ipfw_add_obj_rewriter(struct opcode_obj_rewrite *rw, size_t count);
|
|
int ipfw_del_obj_rewriter(struct opcode_obj_rewrite *rw, size_t count);
|
|
|
|
int ipfw_rewrite_rule_uidx(struct ip_fw_chain *chain,
|
|
struct rule_check_info *ci);
|
|
int ipfw_mark_object_kidx(struct ip_fw_chain *chain, struct ip_fw *rule,
|
|
uint32_t *bmask);
|
|
int ref_opcode_object(struct ip_fw_chain *ch, ipfw_insn *cmd, struct tid_info *ti,
|
|
struct obj_idx *pidx, int *found, int *unresolved);
|
|
void unref_oib_objects(struct ip_fw_chain *ch, ipfw_insn *cmd,
|
|
struct obj_idx *oib, struct obj_idx *end);
|
|
int create_objects_compat(struct ip_fw_chain *ch, ipfw_insn *cmd,
|
|
struct obj_idx *oib, struct obj_idx *pidx, struct tid_info *ti);
|
|
void update_opcode_kidx(ipfw_insn *cmd, uint16_t idx);
|
|
int classify_opcode_kidx(ipfw_insn *cmd, uint16_t *puidx);
|
|
void ipfw_init_srv(struct ip_fw_chain *ch);
|
|
void ipfw_destroy_srv(struct ip_fw_chain *ch);
|
|
|
|
/* In ip_fw_table.c */
|
|
struct table_info;
|
|
|
|
typedef int (table_lookup_t)(struct table_info *ti, void *key, uint32_t keylen,
|
|
uint32_t *val);
|
|
|
|
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, uint16_t plen,
|
|
void *paddr, uint32_t *val);
|
|
int ipfw_init_tables(struct ip_fw_chain *ch, int first);
|
|
int ipfw_resize_tables(struct ip_fw_chain *ch, unsigned int ntables);
|
|
int ipfw_switch_tables_namespace(struct ip_fw_chain *ch, unsigned int nsets);
|
|
void ipfw_destroy_tables(struct ip_fw_chain *ch, int last);
|
|
|
|
/* 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 *);
|
|
|
|
VNET_DECLARE(int, ipfw_nat_ready);
|
|
#define V_ipfw_nat_ready VNET(ipfw_nat_ready)
|
|
#define IPFW_NAT_LOADED (V_ipfw_nat_ready)
|
|
|
|
extern ipfw_nat_t *ipfw_nat_ptr;
|
|
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;
|
|
|
|
/* Helper functions for IP checksum adjustment */
|
|
static __inline uint16_t
|
|
cksum_add(uint16_t sum, uint16_t a)
|
|
{
|
|
uint16_t res;
|
|
|
|
res = sum + a;
|
|
return (res + (res < a));
|
|
}
|
|
|
|
static __inline uint16_t
|
|
cksum_adjust(uint16_t oldsum, uint16_t old, uint16_t new)
|
|
{
|
|
|
|
return (~cksum_add(cksum_add(~oldsum, ~old), new));
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _IPFW2_PRIVATE_H */
|