1*199767f8SToomas Soome /*- 2*199767f8SToomas Soome * Copyright (c) 1982, 1986, 1993 3*199767f8SToomas Soome * The Regents of the University of California. All rights reserved. 4*199767f8SToomas Soome * 5*199767f8SToomas Soome * Redistribution and use in source and binary forms, with or without 6*199767f8SToomas Soome * modification, are permitted provided that the following conditions 7*199767f8SToomas Soome * are met: 8*199767f8SToomas Soome * 1. Redistributions of source code must retain the above copyright 9*199767f8SToomas Soome * notice, this list of conditions and the following disclaimer. 10*199767f8SToomas Soome * 2. Redistributions in binary form must reproduce the above copyright 11*199767f8SToomas Soome * notice, this list of conditions and the following disclaimer in the 12*199767f8SToomas Soome * documentation and/or other materials provided with the distribution. 13*199767f8SToomas Soome * 4. Neither the name of the University nor the names of its contributors 14*199767f8SToomas Soome * may be used to endorse or promote products derived from this software 15*199767f8SToomas Soome * without specific prior written permission. 16*199767f8SToomas Soome * 17*199767f8SToomas Soome * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18*199767f8SToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*199767f8SToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*199767f8SToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21*199767f8SToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*199767f8SToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*199767f8SToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*199767f8SToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*199767f8SToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*199767f8SToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*199767f8SToomas Soome * SUCH DAMAGE. 28*199767f8SToomas Soome * 29*199767f8SToomas Soome * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 30*199767f8SToomas Soome * $FreeBSD$ 31*199767f8SToomas Soome */ 32*199767f8SToomas Soome 33*199767f8SToomas Soome #ifndef _NETINET_IP_VAR_H_ 34*199767f8SToomas Soome #define _NETINET_IP_VAR_H_ 35*199767f8SToomas Soome 36*199767f8SToomas Soome #include <sys/queue.h> 37*199767f8SToomas Soome 38*199767f8SToomas Soome /* 39*199767f8SToomas Soome * Overlay for ip header used by other protocols (tcp, udp). 40*199767f8SToomas Soome */ 41*199767f8SToomas Soome struct ipovly { 42*199767f8SToomas Soome u_char ih_x1[9]; /* (unused) */ 43*199767f8SToomas Soome u_char ih_pr; /* protocol */ 44*199767f8SToomas Soome u_short ih_len; /* protocol length */ 45*199767f8SToomas Soome struct in_addr ih_src; /* source internet address */ 46*199767f8SToomas Soome struct in_addr ih_dst; /* destination internet address */ 47*199767f8SToomas Soome }; 48*199767f8SToomas Soome 49*199767f8SToomas Soome #ifdef _KERNEL 50*199767f8SToomas Soome /* 51*199767f8SToomas Soome * Ip reassembly queue structure. Each fragment 52*199767f8SToomas Soome * being reassembled is attached to one of these structures. 53*199767f8SToomas Soome * They are timed out after ipq_ttl drops to 0, and may also 54*199767f8SToomas Soome * be reclaimed if memory becomes tight. 55*199767f8SToomas Soome */ 56*199767f8SToomas Soome struct ipq { 57*199767f8SToomas Soome TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */ 58*199767f8SToomas Soome u_char ipq_ttl; /* time for reass q to live */ 59*199767f8SToomas Soome u_char ipq_p; /* protocol of this fragment */ 60*199767f8SToomas Soome u_short ipq_id; /* sequence id for reassembly */ 61*199767f8SToomas Soome struct mbuf *ipq_frags; /* to ip headers of fragments */ 62*199767f8SToomas Soome struct in_addr ipq_src,ipq_dst; 63*199767f8SToomas Soome u_char ipq_nfrags; /* # frags in this packet */ 64*199767f8SToomas Soome struct label *ipq_label; /* MAC label */ 65*199767f8SToomas Soome }; 66*199767f8SToomas Soome #endif /* _KERNEL */ 67*199767f8SToomas Soome 68*199767f8SToomas Soome /* 69*199767f8SToomas Soome * Structure stored in mbuf in inpcb.ip_options 70*199767f8SToomas Soome * and passed to ip_output when ip options are in use. 71*199767f8SToomas Soome * The actual length of the options (including ipopt_dst) 72*199767f8SToomas Soome * is in m_len. 73*199767f8SToomas Soome */ 74*199767f8SToomas Soome #define MAX_IPOPTLEN 40 75*199767f8SToomas Soome 76*199767f8SToomas Soome struct ipoption { 77*199767f8SToomas Soome struct in_addr ipopt_dst; /* first-hop dst if source routed */ 78*199767f8SToomas Soome char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 79*199767f8SToomas Soome }; 80*199767f8SToomas Soome 81*199767f8SToomas Soome /* 82*199767f8SToomas Soome * Structure attached to inpcb.ip_moptions and 83*199767f8SToomas Soome * passed to ip_output when IP multicast options are in use. 84*199767f8SToomas Soome * This structure is lazy-allocated. 85*199767f8SToomas Soome */ 86*199767f8SToomas Soome struct ip_moptions { 87*199767f8SToomas Soome struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 88*199767f8SToomas Soome struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ 89*199767f8SToomas Soome u_long imo_multicast_vif; /* vif num outgoing multicasts */ 90*199767f8SToomas Soome u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 91*199767f8SToomas Soome u_char imo_multicast_loop; /* 1 => hear sends if a member */ 92*199767f8SToomas Soome u_short imo_num_memberships; /* no. memberships this socket */ 93*199767f8SToomas Soome u_short imo_max_memberships; /* max memberships this socket */ 94*199767f8SToomas Soome struct in_multi **imo_membership; /* group memberships */ 95*199767f8SToomas Soome struct in_mfilter *imo_mfilters; /* source filters */ 96*199767f8SToomas Soome STAILQ_ENTRY(ip_moptions) imo_link; 97*199767f8SToomas Soome }; 98*199767f8SToomas Soome 99*199767f8SToomas Soome struct ipstat { 100*199767f8SToomas Soome uint64_t ips_total; /* total packets received */ 101*199767f8SToomas Soome uint64_t ips_badsum; /* checksum bad */ 102*199767f8SToomas Soome uint64_t ips_tooshort; /* packet too short */ 103*199767f8SToomas Soome uint64_t ips_toosmall; /* not enough data */ 104*199767f8SToomas Soome uint64_t ips_badhlen; /* ip header length < data size */ 105*199767f8SToomas Soome uint64_t ips_badlen; /* ip length < ip header length */ 106*199767f8SToomas Soome uint64_t ips_fragments; /* fragments received */ 107*199767f8SToomas Soome uint64_t ips_fragdropped; /* frags dropped (dups, out of space) */ 108*199767f8SToomas Soome uint64_t ips_fragtimeout; /* fragments timed out */ 109*199767f8SToomas Soome uint64_t ips_forward; /* packets forwarded */ 110*199767f8SToomas Soome uint64_t ips_fastforward; /* packets fast forwarded */ 111*199767f8SToomas Soome uint64_t ips_cantforward; /* packets rcvd for unreachable dest */ 112*199767f8SToomas Soome uint64_t ips_redirectsent; /* packets forwarded on same net */ 113*199767f8SToomas Soome uint64_t ips_noproto; /* unknown or unsupported protocol */ 114*199767f8SToomas Soome uint64_t ips_delivered; /* datagrams delivered to upper level*/ 115*199767f8SToomas Soome uint64_t ips_localout; /* total ip packets generated here */ 116*199767f8SToomas Soome uint64_t ips_odropped; /* lost packets due to nobufs, etc. */ 117*199767f8SToomas Soome uint64_t ips_reassembled; /* total packets reassembled ok */ 118*199767f8SToomas Soome uint64_t ips_fragmented; /* datagrams successfully fragmented */ 119*199767f8SToomas Soome uint64_t ips_ofragments; /* output fragments created */ 120*199767f8SToomas Soome uint64_t ips_cantfrag; /* don't fragment flag was set, etc. */ 121*199767f8SToomas Soome uint64_t ips_badoptions; /* error in option processing */ 122*199767f8SToomas Soome uint64_t ips_noroute; /* packets discarded due to no route */ 123*199767f8SToomas Soome uint64_t ips_badvers; /* ip version != 4 */ 124*199767f8SToomas Soome uint64_t ips_rawout; /* total raw ip packets generated */ 125*199767f8SToomas Soome uint64_t ips_toolong; /* ip length > max ip packet size */ 126*199767f8SToomas Soome uint64_t ips_notmember; /* multicasts for unregistered grps */ 127*199767f8SToomas Soome uint64_t ips_nogif; /* no match gif found */ 128*199767f8SToomas Soome uint64_t ips_badaddr; /* invalid address on header */ 129*199767f8SToomas Soome }; 130*199767f8SToomas Soome 131*199767f8SToomas Soome #ifdef _KERNEL 132*199767f8SToomas Soome 133*199767f8SToomas Soome #include <sys/counter.h> 134*199767f8SToomas Soome #include <net/vnet.h> 135*199767f8SToomas Soome 136*199767f8SToomas Soome VNET_PCPUSTAT_DECLARE(struct ipstat, ipstat); 137*199767f8SToomas Soome /* 138*199767f8SToomas Soome * In-kernel consumers can use these accessor macros directly to update 139*199767f8SToomas Soome * stats. 140*199767f8SToomas Soome */ 141*199767f8SToomas Soome #define IPSTAT_ADD(name, val) \ 142*199767f8SToomas Soome VNET_PCPUSTAT_ADD(struct ipstat, ipstat, name, (val)) 143*199767f8SToomas Soome #define IPSTAT_SUB(name, val) IPSTAT_ADD(name, -(val)) 144*199767f8SToomas Soome #define IPSTAT_INC(name) IPSTAT_ADD(name, 1) 145*199767f8SToomas Soome #define IPSTAT_DEC(name) IPSTAT_SUB(name, 1) 146*199767f8SToomas Soome 147*199767f8SToomas Soome /* 148*199767f8SToomas Soome * Kernel module consumers must use this accessor macro. 149*199767f8SToomas Soome */ 150*199767f8SToomas Soome void kmod_ipstat_inc(int statnum); 151*199767f8SToomas Soome #define KMOD_IPSTAT_INC(name) \ 152*199767f8SToomas Soome kmod_ipstat_inc(offsetof(struct ipstat, name) / sizeof(uint64_t)) 153*199767f8SToomas Soome void kmod_ipstat_dec(int statnum); 154*199767f8SToomas Soome #define KMOD_IPSTAT_DEC(name) \ 155*199767f8SToomas Soome kmod_ipstat_dec(offsetof(struct ipstat, name) / sizeof(uint64_t)) 156*199767f8SToomas Soome 157*199767f8SToomas Soome /* flags passed to ip_output as last parameter */ 158*199767f8SToomas Soome #define IP_FORWARDING 0x1 /* most of ip header exists */ 159*199767f8SToomas Soome #define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 160*199767f8SToomas Soome #define IP_SENDONES 0x4 /* send all-ones broadcast */ 161*199767f8SToomas Soome #define IP_SENDTOIF 0x8 /* send on specific ifnet */ 162*199767f8SToomas Soome #define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */ 163*199767f8SToomas Soome #define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */ 164*199767f8SToomas Soome #define IP_NODEFAULTFLOWID 0x40 /* Don't set the flowid from inp */ 165*199767f8SToomas Soome 166*199767f8SToomas Soome #ifdef __NO_STRICT_ALIGNMENT 167*199767f8SToomas Soome #define IP_HDR_ALIGNED_P(ip) 1 168*199767f8SToomas Soome #else 169*199767f8SToomas Soome #define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) 170*199767f8SToomas Soome #endif 171*199767f8SToomas Soome 172*199767f8SToomas Soome struct ip; 173*199767f8SToomas Soome struct inpcb; 174*199767f8SToomas Soome struct route; 175*199767f8SToomas Soome struct sockopt; 176*199767f8SToomas Soome 177*199767f8SToomas Soome VNET_DECLARE(int, ip_defttl); /* default IP ttl */ 178*199767f8SToomas Soome VNET_DECLARE(int, ipforwarding); /* ip forwarding */ 179*199767f8SToomas Soome #ifdef IPSTEALTH 180*199767f8SToomas Soome VNET_DECLARE(int, ipstealth); /* stealth forwarding */ 181*199767f8SToomas Soome #endif 182*199767f8SToomas Soome extern u_char ip_protox[]; 183*199767f8SToomas Soome VNET_DECLARE(struct socket *, ip_rsvpd); /* reservation protocol daemon*/ 184*199767f8SToomas Soome VNET_DECLARE(struct socket *, ip_mrouter); /* multicast routing daemon */ 185*199767f8SToomas Soome extern int (*legal_vif_num)(int); 186*199767f8SToomas Soome extern u_long (*ip_mcast_src)(int); 187*199767f8SToomas Soome VNET_DECLARE(int, rsvp_on); 188*199767f8SToomas Soome VNET_DECLARE(int, drop_redirect); 189*199767f8SToomas Soome extern struct pr_usrreqs rip_usrreqs; 190*199767f8SToomas Soome 191*199767f8SToomas Soome #define V_ip_id VNET(ip_id) 192*199767f8SToomas Soome #define V_ip_defttl VNET(ip_defttl) 193*199767f8SToomas Soome #define V_ipforwarding VNET(ipforwarding) 194*199767f8SToomas Soome #ifdef IPSTEALTH 195*199767f8SToomas Soome #define V_ipstealth VNET(ipstealth) 196*199767f8SToomas Soome #endif 197*199767f8SToomas Soome #define V_ip_rsvpd VNET(ip_rsvpd) 198*199767f8SToomas Soome #define V_ip_mrouter VNET(ip_mrouter) 199*199767f8SToomas Soome #define V_rsvp_on VNET(rsvp_on) 200*199767f8SToomas Soome #define V_drop_redirect VNET(drop_redirect) 201*199767f8SToomas Soome 202*199767f8SToomas Soome void inp_freemoptions(struct ip_moptions *); 203*199767f8SToomas Soome int inp_getmoptions(struct inpcb *, struct sockopt *); 204*199767f8SToomas Soome int inp_setmoptions(struct inpcb *, struct sockopt *); 205*199767f8SToomas Soome 206*199767f8SToomas Soome int ip_ctloutput(struct socket *, struct sockopt *sopt); 207*199767f8SToomas Soome void ip_drain(void); 208*199767f8SToomas Soome int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, 209*199767f8SToomas Soome u_long if_hwassist_flags); 210*199767f8SToomas Soome void ip_forward(struct mbuf *m, int srcrt); 211*199767f8SToomas Soome void ip_init(void); 212*199767f8SToomas Soome #ifdef VIMAGE 213*199767f8SToomas Soome void ip_destroy(void); 214*199767f8SToomas Soome #endif 215*199767f8SToomas Soome extern int 216*199767f8SToomas Soome (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 217*199767f8SToomas Soome struct ip_moptions *); 218*199767f8SToomas Soome int ip_output(struct mbuf *, 219*199767f8SToomas Soome struct mbuf *, struct route *, int, struct ip_moptions *, 220*199767f8SToomas Soome struct inpcb *); 221*199767f8SToomas Soome int ipproto_register(short); 222*199767f8SToomas Soome int ipproto_unregister(short); 223*199767f8SToomas Soome struct mbuf * 224*199767f8SToomas Soome ip_reass(struct mbuf *); 225*199767f8SToomas Soome struct in_ifaddr * 226*199767f8SToomas Soome ip_rtaddr(struct in_addr, u_int fibnum); 227*199767f8SToomas Soome void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, 228*199767f8SToomas Soome struct mbuf *); 229*199767f8SToomas Soome void ip_slowtimo(void); 230*199767f8SToomas Soome void ip_fillid(struct ip *); 231*199767f8SToomas Soome int rip_ctloutput(struct socket *, struct sockopt *); 232*199767f8SToomas Soome void rip_ctlinput(int, struct sockaddr *, void *); 233*199767f8SToomas Soome void rip_init(void); 234*199767f8SToomas Soome #ifdef VIMAGE 235*199767f8SToomas Soome void rip_destroy(void); 236*199767f8SToomas Soome #endif 237*199767f8SToomas Soome int rip_input(struct mbuf **, int *, int); 238*199767f8SToomas Soome int rip_output(struct mbuf *, struct socket *, ...); 239*199767f8SToomas Soome int ipip_input(struct mbuf **, int *, int); 240*199767f8SToomas Soome int rsvp_input(struct mbuf **, int *, int); 241*199767f8SToomas Soome int ip_rsvp_init(struct socket *); 242*199767f8SToomas Soome int ip_rsvp_done(void); 243*199767f8SToomas Soome extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *); 244*199767f8SToomas Soome extern void (*ip_rsvp_force_done)(struct socket *); 245*199767f8SToomas Soome extern int (*rsvp_input_p)(struct mbuf **, int *, int); 246*199767f8SToomas Soome 247*199767f8SToomas Soome VNET_DECLARE(struct pfil_head, inet_pfil_hook); /* packet filter hooks */ 248*199767f8SToomas Soome #define V_inet_pfil_hook VNET(inet_pfil_hook) 249*199767f8SToomas Soome 250*199767f8SToomas Soome void in_delayed_cksum(struct mbuf *m); 251*199767f8SToomas Soome 252*199767f8SToomas Soome /* Hooks for ipfw, dummynet, divert etc. Most are declared in raw_ip.c */ 253*199767f8SToomas Soome /* 254*199767f8SToomas Soome * Reference to an ipfw or packet filter rule that can be carried 255*199767f8SToomas Soome * outside critical sections. 256*199767f8SToomas Soome * A rule is identified by rulenum:rule_id which is ordered. 257*199767f8SToomas Soome * In version chain_id the rule can be found in slot 'slot', so 258*199767f8SToomas Soome * we don't need a lookup if chain_id == chain->id. 259*199767f8SToomas Soome * 260*199767f8SToomas Soome * On exit from the firewall this structure refers to the rule after 261*199767f8SToomas Soome * the matching one (slot points to the new rule; rulenum:rule_id-1 262*199767f8SToomas Soome * is the matching rule), and additional info (e.g. info often contains 263*199767f8SToomas Soome * the insn argument or tablearg in the low 16 bits, in host format). 264*199767f8SToomas Soome * On entry, the structure is valid if slot>0, and refers to the starting 265*199767f8SToomas Soome * rules. 'info' contains the reason for reinject, e.g. divert port, 266*199767f8SToomas Soome * divert direction, and so on. 267*199767f8SToomas Soome */ 268*199767f8SToomas Soome struct ipfw_rule_ref { 269*199767f8SToomas Soome uint32_t slot; /* slot for matching rule */ 270*199767f8SToomas Soome uint32_t rulenum; /* matching rule number */ 271*199767f8SToomas Soome uint32_t rule_id; /* matching rule id */ 272*199767f8SToomas Soome uint32_t chain_id; /* ruleset id */ 273*199767f8SToomas Soome uint32_t info; /* see below */ 274*199767f8SToomas Soome }; 275*199767f8SToomas Soome 276*199767f8SToomas Soome enum { 277*199767f8SToomas Soome IPFW_INFO_MASK = 0x0000ffff, 278*199767f8SToomas Soome IPFW_INFO_OUT = 0x00000000, /* outgoing, just for convenience */ 279*199767f8SToomas Soome IPFW_INFO_IN = 0x80000000, /* incoming, overloads dir */ 280*199767f8SToomas Soome IPFW_ONEPASS = 0x40000000, /* One-pass, do not reinject */ 281*199767f8SToomas Soome IPFW_IS_MASK = 0x30000000, /* which source ? */ 282*199767f8SToomas Soome IPFW_IS_DIVERT = 0x20000000, 283*199767f8SToomas Soome IPFW_IS_DUMMYNET =0x10000000, 284*199767f8SToomas Soome IPFW_IS_PIPE = 0x08000000, /* pipe=1, queue = 0 */ 285*199767f8SToomas Soome }; 286*199767f8SToomas Soome #define MTAG_IPFW 1148380143 /* IPFW-tagged cookie */ 287*199767f8SToomas Soome #define MTAG_IPFW_RULE 1262273568 /* rule reference */ 288*199767f8SToomas Soome #define MTAG_IPFW_CALL 1308397630 /* call stack */ 289*199767f8SToomas Soome 290*199767f8SToomas Soome struct ip_fw_args; 291*199767f8SToomas Soome typedef int (*ip_fw_chk_ptr_t)(struct ip_fw_args *args); 292*199767f8SToomas Soome typedef int (*ip_fw_ctl_ptr_t)(struct sockopt *); 293*199767f8SToomas Soome VNET_DECLARE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr); 294*199767f8SToomas Soome #define V_ip_fw_ctl_ptr VNET(ip_fw_ctl_ptr) 295*199767f8SToomas Soome 296*199767f8SToomas Soome /* Divert hooks. */ 297*199767f8SToomas Soome extern void (*ip_divert_ptr)(struct mbuf *m, int incoming); 298*199767f8SToomas Soome /* ng_ipfw hooks -- XXX make it the same as divert and dummynet */ 299*199767f8SToomas Soome extern int (*ng_ipfw_input_p)(struct mbuf **, int, 300*199767f8SToomas Soome struct ip_fw_args *, int); 301*199767f8SToomas Soome 302*199767f8SToomas Soome extern int (*ip_dn_ctl_ptr)(struct sockopt *); 303*199767f8SToomas Soome extern int (*ip_dn_io_ptr)(struct mbuf **, int, struct ip_fw_args *); 304*199767f8SToomas Soome #endif /* _KERNEL */ 305*199767f8SToomas Soome 306*199767f8SToomas Soome #endif /* !_NETINET_IP_VAR_H_ */ 307