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- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1982, 1986, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * 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.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
- *
- * @(#)ip_var.h 8.2 (Berkeley) 1/9/95
- * $FreeBSD$
- */
- #ifndef _NETINET_IP_VAR_H_
- #define _NETINET_IP_VAR_H_
- #include <sys/queue.h>
- #include <sys/epoch.h>
- /*
- * Overlay for ip header used by other protocols (tcp, udp).
- */
- struct ipovly {
- u_char ih_x1[9]; /* (unused) */
- u_char ih_pr; /* protocol */
- u_short ih_len; /* protocol length */
- struct in_addr ih_src; /* source internet address */
- struct in_addr ih_dst; /* destination internet address */
- };
- #ifdef _KERNEL
- /*
- * Ip reassembly queue structure. Each fragment
- * being reassembled is attached to one of these structures.
- * They are timed out after ipq_ttl drops to 0, and may also
- * be reclaimed if memory becomes tight.
- */
- struct ipq {
- TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */
- u_char ipq_ttl; /* time for reass q to live */
- u_char ipq_p; /* protocol of this fragment */
- u_short ipq_id; /* sequence id for reassembly */
- int ipq_maxoff; /* total length of packet */
- struct mbuf *ipq_frags; /* to ip headers of fragments */
- struct in_addr ipq_src,ipq_dst;
- u_char ipq_nfrags; /* # frags in this packet */
- struct label *ipq_label; /* MAC label */
- };
- #endif /* _KERNEL */
- /*
- * Structure stored in mbuf in inpcb.ip_options
- * and passed to ip_output when ip options are in use.
- * The actual length of the options (including ipopt_dst)
- * is in m_len.
- */
- #define MAX_IPOPTLEN 40
- struct ipoption {
- struct in_addr ipopt_dst; /* first-hop dst if source routed */
- char ipopt_list[MAX_IPOPTLEN]; /* options proper */
- };
- #if defined(_NETINET_IN_VAR_H_) && defined(_KERNEL)
- /*
- * Structure attached to inpcb.ip_moptions and
- * passed to ip_output when IP multicast options are in use.
- * This structure is lazy-allocated.
- */
- struct ip_moptions {
- struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
- struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
- u_long imo_multicast_vif; /* vif num outgoing multicasts */
- u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
- u_char imo_multicast_loop; /* 1 => hear sends if a member */
- struct ip_mfilter_head imo_head; /* group membership list */
- };
- #else
- struct ip_moptions;
- #endif
- struct ipstat {
- uint64_t ips_total; /* total packets received */
- uint64_t ips_badsum; /* checksum bad */
- uint64_t ips_tooshort; /* packet too short */
- uint64_t ips_toosmall; /* not enough data */
- uint64_t ips_badhlen; /* ip header length < data size */
- uint64_t ips_badlen; /* ip length < ip header length */
- uint64_t ips_fragments; /* fragments received */
- uint64_t ips_fragdropped; /* frags dropped (dups, out of space) */
- uint64_t ips_fragtimeout; /* fragments timed out */
- uint64_t ips_forward; /* packets forwarded */
- uint64_t ips_fastforward; /* packets fast forwarded */
- uint64_t ips_cantforward; /* packets rcvd for unreachable dest */
- uint64_t ips_redirectsent; /* packets forwarded on same net */
- uint64_t ips_noproto; /* unknown or unsupported protocol */
- uint64_t ips_delivered; /* datagrams delivered to upper level*/
- uint64_t ips_localout; /* total ip packets generated here */
- uint64_t ips_odropped; /* lost packets due to nobufs, etc. */
- uint64_t ips_reassembled; /* total packets reassembled ok */
- uint64_t ips_fragmented; /* datagrams successfully fragmented */
- uint64_t ips_ofragments; /* output fragments created */
- uint64_t ips_cantfrag; /* don't fragment flag was set, etc. */
- uint64_t ips_badoptions; /* error in option processing */
- uint64_t ips_noroute; /* packets discarded due to no route */
- uint64_t ips_badvers; /* ip version != 4 */
- uint64_t ips_rawout; /* total raw ip packets generated */
- uint64_t ips_toolong; /* ip length > max ip packet size */
- uint64_t ips_notmember; /* multicasts for unregistered grps */
- uint64_t ips_nogif; /* no match gif found */
- uint64_t ips_badaddr; /* invalid address on header */
- };
- #ifdef _KERNEL
- #include <sys/counter.h>
- #include <net/vnet.h>
- VNET_PCPUSTAT_DECLARE(struct ipstat, ipstat);
- /*
- * In-kernel consumers can use these accessor macros directly to update
- * stats.
- */
- #define IPSTAT_ADD(name, val) \
- VNET_PCPUSTAT_ADD(struct ipstat, ipstat, name, (val))
- #define IPSTAT_SUB(name, val) IPSTAT_ADD(name, -(val))
- #define IPSTAT_INC(name) IPSTAT_ADD(name, 1)
- #define IPSTAT_DEC(name) IPSTAT_SUB(name, 1)
- /*
- * Kernel module consumers must use this accessor macro.
- */
- void kmod_ipstat_inc(int statnum);
- #define KMOD_IPSTAT_INC(name) \
- kmod_ipstat_inc(offsetof(struct ipstat, name) / sizeof(uint64_t))
- void kmod_ipstat_dec(int statnum);
- #define KMOD_IPSTAT_DEC(name) \
- kmod_ipstat_dec(offsetof(struct ipstat, name) / sizeof(uint64_t))
- /* flags passed to ip_output as last parameter */
- #define IP_FORWARDING 0x1 /* most of ip header exists */
- #define IP_RAWOUTPUT 0x2 /* raw ip header exists */
- #define IP_SENDONES 0x4 /* send all-ones broadcast */
- #define IP_SENDTOIF 0x8 /* send on specific ifnet */
- #define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */
- #define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */
- #define IP_NODEFAULTFLOWID 0x40 /* Don't set the flowid from inp */
- #define IP_NO_SND_TAG_RL 0x80 /* Don't send down the ratelimit tag */
- #ifdef __NO_STRICT_ALIGNMENT
- #define IP_HDR_ALIGNED_P(ip) 1
- #else
- #define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0)
- #endif
- struct ip;
- struct inpcb;
- struct route;
- struct sockopt;
- struct inpcbinfo;
- VNET_DECLARE(int, ip_defttl); /* default IP ttl */
- VNET_DECLARE(int, ipforwarding); /* ip forwarding */
- VNET_DECLARE(int, ipsendredirects);
- #ifdef IPSTEALTH
- VNET_DECLARE(int, ipstealth); /* stealth forwarding */
- #endif
- extern u_char ip_protox[];
- VNET_DECLARE(struct socket *, ip_rsvpd); /* reservation protocol daemon*/
- VNET_DECLARE(struct socket *, ip_mrouter); /* multicast routing daemon */
- extern int (*legal_vif_num)(int);
- extern u_long (*ip_mcast_src)(int);
- VNET_DECLARE(int, rsvp_on);
- VNET_DECLARE(int, drop_redirect);
- extern struct pr_usrreqs rip_usrreqs;
- #define V_ip_id VNET(ip_id)
- #define V_ip_defttl VNET(ip_defttl)
- #define V_ipforwarding VNET(ipforwarding)
- #define V_ipsendredirects VNET(ipsendredirects)
- #ifdef IPSTEALTH
- #define V_ipstealth VNET(ipstealth)
- #endif
- #define V_ip_rsvpd VNET(ip_rsvpd)
- #define V_ip_mrouter VNET(ip_mrouter)
- #define V_rsvp_on VNET(rsvp_on)
- #define V_drop_redirect VNET(drop_redirect)
- void inp_freemoptions(struct ip_moptions *);
- int inp_getmoptions(struct inpcb *, struct sockopt *);
- int inp_setmoptions(struct inpcb *, struct sockopt *);
- int ip_ctloutput(struct socket *, struct sockopt *sopt);
- void ip_drain(void);
- int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu,
- u_long if_hwassist_flags);
- void ip_forward(struct mbuf *m, int srcrt);
- void ip_init(void);
- extern int
- (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
- struct ip_moptions *);
- int ip_output(struct mbuf *,
- struct mbuf *, struct route *, int, struct ip_moptions *,
- struct inpcb *);
- int ipproto_register(short);
- int ipproto_unregister(short);
- struct mbuf *
- ip_reass(struct mbuf *);
- void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
- struct mbuf *);
- void ip_slowtimo(void);
- void ip_fillid(struct ip *);
- int rip_ctloutput(struct socket *, struct sockopt *);
- void rip_ctlinput(int, struct sockaddr *, void *);
- void rip_init(void);
- int rip_input(struct mbuf **, int *, int);
- int rip_output(struct mbuf *, struct socket *, ...);
- int ipip_input(struct mbuf **, int *, int);
- int rsvp_input(struct mbuf **, int *, int);
- int ip_rsvp_init(struct socket *);
- int ip_rsvp_done(void);
- extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
- extern void (*ip_rsvp_force_done)(struct socket *);
- extern int (*rsvp_input_p)(struct mbuf **, int *, int);
- VNET_DECLARE(struct pfil_head *, inet_pfil_head);
- #define V_inet_pfil_head VNET(inet_pfil_head)
- #define PFIL_INET_NAME "inet"
- void in_delayed_cksum(struct mbuf *m);
- /* Hooks for ipfw, dummynet, divert etc. Most are declared in raw_ip.c */
- /*
- * Reference to an ipfw or packet filter rule that can be carried
- * outside critical sections.
- * A rule is identified by rulenum:rule_id which is ordered.
- * In version chain_id the rule can be found in slot 'slot', so
- * we don't need a lookup if chain_id == chain->id.
- *
- * On exit from the firewall this structure refers to the rule after
- * the matching one (slot points to the new rule; rulenum:rule_id-1
- * is the matching rule), and additional info (e.g. info often contains
- * the insn argument or tablearg in the low 16 bits, in host format).
- * On entry, the structure is valid if slot>0, and refers to the starting
- * rules. 'info' contains the reason for reinject, e.g. divert port,
- * divert direction, and so on.
- */
- struct ipfw_rule_ref {
- uint32_t slot; /* slot for matching rule */
- uint32_t rulenum; /* matching rule number */
- uint32_t rule_id; /* matching rule id */
- uint32_t chain_id; /* ruleset id */
- uint32_t info; /* see below */
- };
- enum {
- IPFW_INFO_MASK = 0x0000ffff,
- IPFW_INFO_OUT = 0x00000000, /* outgoing, just for convenience */
- IPFW_INFO_IN = 0x80000000, /* incoming, overloads dir */
- IPFW_ONEPASS = 0x40000000, /* One-pass, do not reinject */
- IPFW_IS_MASK = 0x30000000, /* which source ? */
- IPFW_IS_DIVERT = 0x20000000,
- IPFW_IS_DUMMYNET =0x10000000,
- IPFW_IS_PIPE = 0x08000000, /* pipe=1, queue = 0 */
- };
- #define MTAG_IPFW 1148380143 /* IPFW-tagged cookie */
- #define MTAG_IPFW_RULE 1262273568 /* rule reference */
- #define MTAG_IPFW_CALL 1308397630 /* call stack */
- struct ip_fw_args;
- typedef int (*ip_fw_chk_ptr_t)(struct ip_fw_args *args);
- typedef int (*ip_fw_ctl_ptr_t)(struct sockopt *);
- VNET_DECLARE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr);
- #define V_ip_fw_ctl_ptr VNET(ip_fw_ctl_ptr)
- /* Divert hooks. */
- extern void (*ip_divert_ptr)(struct mbuf *m, bool incoming);
- /* ng_ipfw hooks -- XXX make it the same as divert and dummynet */
- extern int (*ng_ipfw_input_p)(struct mbuf **, struct ip_fw_args *, bool);
- extern int (*ip_dn_ctl_ptr)(struct sockopt *);
- extern int (*ip_dn_io_ptr)(struct mbuf **, struct ip_fw_args *);
- #endif /* _KERNEL */
- #endif /* !_NETINET_IP_VAR_H_ */
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