1139823Simp/*- 21541Srgrimes * Copyright (c) 1982, 1986, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * Redistribution and use in source and binary forms, with or without 61541Srgrimes * modification, are permitted provided that the following conditions 71541Srgrimes * are met: 81541Srgrimes * 1. Redistributions of source code must retain the above copyright 91541Srgrimes * notice, this list of conditions and the following disclaimer. 101541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer in the 121541Srgrimes * documentation and/or other materials provided with the distribution. 131541Srgrimes * 4. Neither the name of the University nor the names of its contributors 141541Srgrimes * may be used to endorse or promote products derived from this software 151541Srgrimes * without specific prior written permission. 161541Srgrimes * 171541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271541Srgrimes * SUCH DAMAGE. 281541Srgrimes * 2910942Swollman * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 3050477Speter * $FreeBSD$ 311541Srgrimes */ 321541Srgrimes 332169Spaul#ifndef _NETINET_IP_VAR_H_ 3418940Sbde#define _NETINET_IP_VAR_H_ 352169Spaul 3678064Sume#include <sys/queue.h> 3778064Sume 381541Srgrimes/* 391541Srgrimes * Overlay for ip header used by other protocols (tcp, udp). 401541Srgrimes */ 411541Srgrimesstruct ipovly { 4238513Sdfr u_char ih_x1[9]; /* (unused) */ 431541Srgrimes u_char ih_pr; /* protocol */ 4419183Sfenner u_short ih_len; /* protocol length */ 451541Srgrimes struct in_addr ih_src; /* source internet address */ 461541Srgrimes struct in_addr ih_dst; /* destination internet address */ 471541Srgrimes}; 481541Srgrimes 49100419Srwatson#ifdef _KERNEL 501541Srgrimes/* 511541Srgrimes * Ip reassembly queue structure. Each fragment 521541Srgrimes * being reassembled is attached to one of these structures. 531541Srgrimes * They are timed out after ipq_ttl drops to 0, and may also 541541Srgrimes * be reclaimed if memory becomes tight. 551541Srgrimes */ 561541Srgrimesstruct ipq { 5774362Sphk TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */ 581541Srgrimes u_char ipq_ttl; /* time for reass q to live */ 591541Srgrimes u_char ipq_p; /* protocol of this fragment */ 601541Srgrimes u_short ipq_id; /* sequence id for reassembly */ 6138513Sdfr struct mbuf *ipq_frags; /* to ip headers of fragments */ 621541Srgrimes struct in_addr ipq_src,ipq_dst; 63111244Ssilby u_char ipq_nfrags; /* # frags in this packet */ 64168365Sandre struct label *ipq_label; /* MAC label */ 651541Srgrimes}; 66100419Srwatson#endif /* _KERNEL */ 671541Srgrimes 681541Srgrimes/* 69152608Sandre * Structure stored in mbuf in inpcb.ip_options 70152608Sandre * and passed to ip_output when ip options are in use. 71152608Sandre * The actual length of the options (including ipopt_dst) 72152608Sandre * is in m_len. 73152608Sandre */ 74152608Sandre#define MAX_IPOPTLEN 40 75152608Sandre 76152608Sandrestruct ipoption { 77152608Sandre struct in_addr ipopt_dst; /* first-hop dst if source routed */ 78152608Sandre char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 79152608Sandre}; 80152608Sandre 81152608Sandre/* 821541Srgrimes * Structure attached to inpcb.ip_moptions and 831541Srgrimes * passed to ip_output when IP multicast options are in use. 84170613Sbms * This structure is lazy-allocated. 851541Srgrimes */ 861541Srgrimesstruct ip_moptions { 871541Srgrimes struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 8878064Sume struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ 89158563Sbms u_long imo_multicast_vif; /* vif num outgoing multicasts */ 901541Srgrimes u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 911541Srgrimes u_char imo_multicast_loop; /* 1 => hear sends if a member */ 921541Srgrimes u_short imo_num_memberships; /* no. memberships this socket */ 93158563Sbms u_short imo_max_memberships; /* max memberships this socket */ 94158563Sbms struct in_multi **imo_membership; /* group memberships */ 95170613Sbms struct in_mfilter *imo_mfilters; /* source filters */ 96228969Sjhb STAILQ_ENTRY(ip_moptions) imo_link; 971541Srgrimes}; 981541Srgrimes 991541Srgrimesstruct ipstat { 100249276Sglebius uint64_t ips_total; /* total packets received */ 101249276Sglebius uint64_t ips_badsum; /* checksum bad */ 102249276Sglebius uint64_t ips_tooshort; /* packet too short */ 103249276Sglebius uint64_t ips_toosmall; /* not enough data */ 104249276Sglebius uint64_t ips_badhlen; /* ip header length < data size */ 105249276Sglebius uint64_t ips_badlen; /* ip length < ip header length */ 106249276Sglebius uint64_t ips_fragments; /* fragments received */ 107249276Sglebius uint64_t ips_fragdropped; /* frags dropped (dups, out of space) */ 108249276Sglebius uint64_t ips_fragtimeout; /* fragments timed out */ 109249276Sglebius uint64_t ips_forward; /* packets forwarded */ 110249276Sglebius uint64_t ips_fastforward; /* packets fast forwarded */ 111249276Sglebius uint64_t ips_cantforward; /* packets rcvd for unreachable dest */ 112249276Sglebius uint64_t ips_redirectsent; /* packets forwarded on same net */ 113249276Sglebius uint64_t ips_noproto; /* unknown or unsupported protocol */ 114249276Sglebius uint64_t ips_delivered; /* datagrams delivered to upper level*/ 115249276Sglebius uint64_t ips_localout; /* total ip packets generated here */ 116249276Sglebius uint64_t ips_odropped; /* lost packets due to nobufs, etc. */ 117249276Sglebius uint64_t ips_reassembled; /* total packets reassembled ok */ 118249276Sglebius uint64_t ips_fragmented; /* datagrams successfully fragmented */ 119249276Sglebius uint64_t ips_ofragments; /* output fragments created */ 120249276Sglebius uint64_t ips_cantfrag; /* don't fragment flag was set, etc. */ 121249276Sglebius uint64_t ips_badoptions; /* error in option processing */ 122249276Sglebius uint64_t ips_noroute; /* packets discarded due to no route */ 123249276Sglebius uint64_t ips_badvers; /* ip version != 4 */ 124249276Sglebius uint64_t ips_rawout; /* total raw ip packets generated */ 125249276Sglebius uint64_t ips_toolong; /* ip length > max ip packet size */ 126249276Sglebius uint64_t ips_notmember; /* multicasts for unregistered grps */ 127249276Sglebius uint64_t ips_nogif; /* no match gif found */ 128249276Sglebius uint64_t ips_badaddr; /* invalid address on header */ 1291541Srgrimes}; 1301541Srgrimes 13155205Speter#ifdef _KERNEL 13237625Sbde 133249276Sglebius#include <sys/counter.h> 134195699Srwatson#include <net/vnet.h> 135195699Srwatson 136253083SaeVNET_PCPUSTAT_DECLARE(struct ipstat, ipstat); 137196039Srwatson/* 138196039Srwatson * In-kernel consumers can use these accessor macros directly to update 139196039Srwatson * stats. 140196039Srwatson */ 141253083Sae#define IPSTAT_ADD(name, val) \ 142253083Sae VNET_PCPUSTAT_ADD(struct ipstat, ipstat, name, (val)) 143249411Sae#define IPSTAT_SUB(name, val) IPSTAT_ADD(name, -(val)) 144190951Srwatson#define IPSTAT_INC(name) IPSTAT_ADD(name, 1) 145249411Sae#define IPSTAT_DEC(name) IPSTAT_SUB(name, 1) 146190951Srwatson 147196039Srwatson/* 148196039Srwatson * Kernel module consumers must use this accessor macro. 149196039Srwatson */ 150196039Srwatsonvoid kmod_ipstat_inc(int statnum); 151253083Sae#define KMOD_IPSTAT_INC(name) \ 152253083Sae kmod_ipstat_inc(offsetof(struct ipstat, name) / sizeof(uint64_t)) 153196039Srwatsonvoid kmod_ipstat_dec(int statnum); 154253083Sae#define KMOD_IPSTAT_DEC(name) \ 155253083Sae kmod_ipstat_dec(offsetof(struct ipstat, name) / sizeof(uint64_t)) 156196039Srwatson 157170613Sbms/* flags passed to ip_output as last parameter */ 158170613Sbms#define IP_FORWARDING 0x1 /* most of ip header exists */ 159170613Sbms#define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 160170613Sbms#define IP_SENDONES 0x4 /* send all-ones broadcast */ 161170613Sbms#define IP_SENDTOIF 0x8 /* send on specific ifnet */ 162168365Sandre#define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */ 163168365Sandre#define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */ 1641541Srgrimes 165147744Sthompsa#ifdef __NO_STRICT_ALIGNMENT 166147744Sthompsa#define IP_HDR_ALIGNED_P(ip) 1 167147744Sthompsa#else 168147744Sthompsa#define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 169147744Sthompsa#endif 170147744Sthompsa 17138482Swollmanstruct ip; 17219669Sbdestruct inpcb; 17318940Sbdestruct route; 17438482Swollmanstruct sockopt; 17518940Sbde 176195699SrwatsonVNET_DECLARE(u_short, ip_id); /* ip packet ctr, for ids */ 177195699SrwatsonVNET_DECLARE(int, ip_defttl); /* default IP ttl */ 178195699SrwatsonVNET_DECLARE(int, ipforwarding); /* ip forwarding */ 179122723Sandre#ifdef IPSTEALTH 180195699SrwatsonVNET_DECLARE(int, ipstealth); /* stealth forwarding */ 181122723Sandre#endif 182207369Sbzextern u_char ip_protox[]; 183195699SrwatsonVNET_DECLARE(struct socket *, ip_rsvpd); /* reservation protocol daemon*/ 184195699SrwatsonVNET_DECLARE(struct socket *, ip_mrouter); /* multicast routing daemon */ 185207369Sbzextern int (*legal_vif_num)(int); 186207369Sbzextern u_long (*ip_mcast_src)(int); 187207369SbzVNET_DECLARE(int, rsvp_on); 188241406SmelifaroVNET_DECLARE(int, drop_redirect); 189207369Sbzextern struct pr_usrreqs rip_usrreqs; 190193502Sluigi 191195727Srwatson#define V_ip_id VNET(ip_id) 192195727Srwatson#define V_ip_defttl VNET(ip_defttl) 193195727Srwatson#define V_ipforwarding VNET(ipforwarding) 194195699Srwatson#ifdef IPSTEALTH 195195727Srwatson#define V_ipstealth VNET(ipstealth) 196195699Srwatson#endif 197195727Srwatson#define V_ip_rsvpd VNET(ip_rsvpd) 198195727Srwatson#define V_ip_mrouter VNET(ip_mrouter) 199207369Sbz#define V_rsvp_on VNET(rsvp_on) 200241406Smelifaro#define V_drop_redirect VNET(drop_redirect) 201195699Srwatson 202170613Sbmsvoid inp_freemoptions(struct ip_moptions *); 203170613Sbmsint inp_getmoptions(struct inpcb *, struct sockopt *); 204170613Sbmsint inp_setmoptions(struct inpcb *, struct sockopt *); 205170613Sbms 206168365Sandreint ip_ctloutput(struct socket *, struct sockopt *sopt); 207168365Sandrevoid ip_drain(void); 208168365Sandreint ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, 209242161Sglebius u_long if_hwassist_flags); 210168365Sandrevoid ip_forward(struct mbuf *m, int srcrt); 211168365Sandrevoid ip_init(void); 212204140Sbz#ifdef VIMAGE 213204140Sbzvoid ip_destroy(void); 214204140Sbz#endif 215168365Sandreextern int 216168365Sandre (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 217168365Sandre struct ip_moptions *); 218168365Sandreint ip_output(struct mbuf *, 219105194Ssam struct mbuf *, struct route *, int, struct ip_moptions *, 220105194Ssam struct inpcb *); 221212155Sbzint ipproto_register(short); 222212155Sbzint ipproto_unregister(short); 223133920Sandrestruct mbuf * 224168365Sandre ip_reass(struct mbuf *); 22587120Srustruct in_ifaddr * 226178888Sjulian ip_rtaddr(struct in_addr, u_int fibnum); 227168365Sandrevoid ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, 228168365Sandre struct mbuf *); 229168365Sandrevoid ip_slowtimo(void); 230133720Sdwmaloneu_int16_t ip_randomid(void); 23198663Sluigiint rip_ctloutput(struct socket *, struct sockopt *); 23298663Sluigivoid rip_ctlinput(int, struct sockaddr *, void *); 23398663Sluigivoid rip_init(void); 234193731Szec#ifdef VIMAGE 235193731Szecvoid rip_destroy(void); 236193731Szec#endif 23798663Sluigivoid rip_input(struct mbuf *, int); 23898663Sluigiint rip_output(struct mbuf *, struct socket *, u_long); 23992723Salfredvoid ipip_input(struct mbuf *, int); 24092723Salfredvoid rsvp_input(struct mbuf *, int); 24192723Salfredint ip_rsvp_init(struct socket *); 24292723Salfredint ip_rsvp_done(void); 243106968Sluigiextern int (*ip_rsvp_vif)(struct socket *, struct sockopt *); 244106968Sluigiextern void (*ip_rsvp_force_done)(struct socket *); 245106968Sluigiextern void (*rsvp_input_p)(struct mbuf *m, int off); 2467083Swollman 247197952SjulianVNET_DECLARE(struct pfil_head, inet_pfil_hook); /* packet filter hooks */ 248197952Sjulian#define V_inet_pfil_hook VNET(inet_pfil_hook) 249120386Ssam 25060765Sjlemonvoid in_delayed_cksum(struct mbuf *m); 25160765Sjlemon 252201735Sluigi/* Hooks for ipfw, dummynet, divert etc. Most are declared in raw_ip.c */ 253201735Sluigi/* 254201735Sluigi * Reference to an ipfw or packet filter rule that can be carried 255201735Sluigi * outside critical sections. 256201735Sluigi * A rule is identified by rulenum:rule_id which is ordered. 257201735Sluigi * In version chain_id the rule can be found in slot 'slot', so 258201735Sluigi * we don't need a lookup if chain_id == chain->id. 259201735Sluigi * 260201735Sluigi * On exit from the firewall this structure refers to the rule after 261201735Sluigi * the matching one (slot points to the new rule; rulenum:rule_id-1 262201735Sluigi * is the matching rule), and additional info (e.g. info often contains 263201735Sluigi * the insn argument or tablearg in the low 16 bits, in host format). 264201735Sluigi * On entry, the structure is valid if slot>0, and refers to the starting 265201735Sluigi * rules. 'info' contains the reason for reinject, e.g. divert port, 266201735Sluigi * divert direction, and so on. 267201735Sluigi */ 268201735Sluigistruct ipfw_rule_ref { 269201735Sluigi uint32_t slot; /* slot for matching rule */ 270201735Sluigi uint32_t rulenum; /* matching rule number */ 271201735Sluigi uint32_t rule_id; /* matching rule id */ 272201735Sluigi uint32_t chain_id; /* ruleset id */ 273201735Sluigi uint32_t info; /* see below */ 274201735Sluigi}; 275201735Sluigi 276201735Sluigienum { 277201735Sluigi IPFW_INFO_MASK = 0x0000ffff, 278201735Sluigi IPFW_INFO_OUT = 0x00000000, /* outgoing, just for convenience */ 279201735Sluigi IPFW_INFO_IN = 0x80000000, /* incoming, overloads dir */ 280201735Sluigi IPFW_ONEPASS = 0x40000000, /* One-pass, do not reinject */ 281201735Sluigi IPFW_IS_MASK = 0x30000000, /* which source ? */ 282201735Sluigi IPFW_IS_DIVERT = 0x20000000, 283201735Sluigi IPFW_IS_DUMMYNET =0x10000000, 284201735Sluigi IPFW_IS_PIPE = 0x08000000, /* pip1=1, queue = 0 */ 285201735Sluigi}; 286201735Sluigi#define MTAG_IPFW 1148380143 /* IPFW-tagged cookie */ 287201735Sluigi#define MTAG_IPFW_RULE 1262273568 /* rule reference */ 288223666Sae#define MTAG_IPFW_CALL 1308397630 /* call stack */ 289201735Sluigi 290193502Sluigistruct ip_fw_args; 291197952Sjuliantypedef int (*ip_fw_chk_ptr_t)(struct ip_fw_args *args); 292197952Sjuliantypedef int (*ip_fw_ctl_ptr_t)(struct sockopt *); 293197952SjulianVNET_DECLARE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr); 294197952Sjulian#define V_ip_fw_ctl_ptr VNET(ip_fw_ctl_ptr) 295197952Sjulian 296201735Sluigi/* Divert hooks. */ 297201735Sluigiextern void (*ip_divert_ptr)(struct mbuf *m, int incoming); 298201735Sluigi/* ng_ipfw hooks -- XXX make it the same as divert and dummynet */ 299201735Sluigiextern int (*ng_ipfw_input_p)(struct mbuf **, int, 300201735Sluigi struct ip_fw_args *, int); 301201735Sluigi 302193502Sluigiextern int (*ip_dn_ctl_ptr)(struct sockopt *); 303201735Sluigiextern int (*ip_dn_io_ptr)(struct mbuf **, int, struct ip_fw_args *); 304195699Srwatson 305195699SrwatsonVNET_DECLARE(int, ip_do_randomid); 306195727Srwatson#define V_ip_do_randomid VNET(ip_do_randomid) 307195699Srwatson#define ip_newid() ((V_ip_do_randomid != 0) ? ip_randomid() : \ 308195699Srwatson htons(V_ip_id++)) 309195699Srwatson 31055205Speter#endif /* _KERNEL */ 31117072Sjulian 31237625Sbde#endif /* !_NETINET_IP_VAR_H_ */ 313