ip6_var.h revision 53541
1/* 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/netinet6/ip6_var.h 53541 1999-11-22 02:45:11Z shin $ 30 */ 31 32/* 33 * Copyright (c) 1982, 1986, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)ip_var.h 8.1 (Berkeley) 6/10/93 65 */ 66 67#ifndef _NETINET6_IP6_VAR_H_ 68#define _NETINET6_IP6_VAR_H_ 69 70/* 71 * IP6 reassembly queue structure. Each fragment 72 * being reassembled is attached to one of these structures. 73 */ 74struct ip6q { 75 u_long ip6q_head; 76 u_short ip6q_len; 77 u_char ip6q_nxt; 78 u_char ip6q_hlim; 79 struct ip6asfrag *ip6q_down; 80 struct ip6asfrag *ip6q_up; 81 u_long ip6q_ident; 82 u_char ip6q_arrive; 83 u_char ip6q_ttl; 84 struct in6_addr ip6q_src, ip6q_dst; 85 struct ip6q *ip6q_next; 86 struct ip6q *ip6q_prev; 87 int ip6q_unfrglen; 88}; 89 90struct ip6asfrag { 91 u_long ip6af_head; 92 u_short ip6af_len; 93 u_char ip6af_nxt; 94 u_char ip6af_hlim; 95 /* must not override the above members during reassembling */ 96 struct ip6asfrag *ip6af_down; 97 struct ip6asfrag *ip6af_up; 98 u_short ip6af_mff; 99 u_short ip6af_off; 100 struct mbuf *ip6af_m; 101 u_long ip6af_offset; /* offset where next header starts */ 102 u_short ip6af_frglen; /* fragmentable part length */ 103 u_char ip6af_x1[10]; 104}; 105 106#define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m)) 107 108struct ip6_moptions { 109 struct ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */ 110 u_char im6o_multicast_hlim; /* hoplimit for outgoing multicasts */ 111 u_char im6o_multicast_loop; /* 1 >= hear sends if a member */ 112 LIST_HEAD(, in6_multi_mship) im6o_memberships; 113}; 114 115/* 116 * Control options for outgoing packets 117 */ 118 119/* Routing header related info */ 120struct ip6po_rhinfo { 121 struct ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */ 122 struct route_in6 ip6po_rhi_route; /* Route to the 1st hop */ 123}; 124#define ip6po_rthdr ip6po_rhinfo.ip6po_rhi_rthdr 125#define ip6po_route ip6po_rhinfo.ip6po_rhi_route 126 127struct ip6_pktopts { 128 struct mbuf *ip6po_m; /* Pointer to mbuf storing the data */ 129 int ip6po_hlim; /* Hoplimit for outgoing packets */ 130 struct in6_pktinfo *ip6po_pktinfo; /* Outgoing IF/address information */ 131 struct sockaddr *ip6po_nexthop; /* Next-hop address */ 132 struct ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */ 133 struct ip6_dest *ip6po_dest1; /* Destination options header(1st part) */ 134 struct ip6po_rhinfo ip6po_rhinfo; /* Routing header related info. */ 135 struct ip6_dest *ip6po_dest2; /* Destination options header(2nd part) */ 136}; 137 138struct ip6stat { 139 u_long ip6s_total; /* total packets received */ 140 u_long ip6s_tooshort; /* packet too short */ 141 u_long ip6s_toosmall; /* not enough data */ 142 u_long ip6s_fragments; /* fragments received */ 143 u_long ip6s_fragdropped; /* frags dropped(dups, out of space) */ 144 u_long ip6s_fragtimeout; /* fragments timed out */ 145 u_long ip6s_fragoverflow; /* fragments that exceeded limit */ 146 u_long ip6s_forward; /* packets forwarded */ 147 u_long ip6s_cantforward; /* packets rcvd for unreachable dest */ 148 u_long ip6s_redirectsent; /* packets forwarded on same net */ 149 u_long ip6s_delivered; /* datagrams delivered to upper level*/ 150 u_long ip6s_localout; /* total ip packets generated here */ 151 u_long ip6s_odropped; /* lost packets due to nobufs, etc. */ 152 u_long ip6s_reassembled; /* total packets reassembled ok */ 153 u_long ip6s_fragmented; /* datagrams sucessfully fragmented */ 154 u_long ip6s_ofragments; /* output fragments created */ 155 u_long ip6s_cantfrag; /* don't fragment flag was set, etc. */ 156 u_long ip6s_badoptions; /* error in option processing */ 157 u_long ip6s_noroute; /* packets discarded due to no route */ 158 u_long ip6s_badvers; /* ip6 version != 6 */ 159 u_long ip6s_rawout; /* total raw ip packets generated */ 160 u_long ip6s_badscope; /* scope error */ 161 u_long ip6s_notmember; /* don't join this multicast group */ 162 u_long ip6s_nxthist[256]; /* next header history */ 163 u_long ip6s_m1; /* one mbuf */ 164 u_long ip6s_m2m[32]; /* two or more mbuf */ 165 u_long ip6s_mext1; /* one ext mbuf */ 166 u_long ip6s_mext2m; /* two or more ext mbuf */ 167 u_long ip6s_exthdrtoolong; /* ext hdr are not continuous */ 168 u_long ip6s_nogif; /* no match gif found */ 169 u_long ip6s_toomanyhdr; /* discarded due to too many headers */ 170}; 171 172#ifdef _KERNEL 173/* flags passed to ip6_output as last parameter */ 174#define IPV6_DADOUTPUT 0x01 /* DAD */ 175#define IPV6_FORWARDING 0x02 /* most of IPv6 header exists */ 176 177extern struct ip6stat ip6stat; /* statistics */ 178extern u_int32_t ip6_id; /* fragment identifier */ 179extern int ip6_defhlim; /* default hop limit */ 180extern int ip6_defmcasthlim; /* default multicast hop limit */ 181extern int ip6_forwarding; /* act as router? */ 182extern int ip6_forward_srcrt; /* forward src-routed? */ 183extern int ip6_gif_hlim; /* Hop limit for gif encap packet */ 184extern int ip6_use_deprecated; /* allow deprecated addr as source */ 185extern int ip6_rr_prune; /* router renumbering prefix 186 * walk list every 5 sec. */ 187extern int ip6_mapped_addr_on; 188 189extern struct socket *ip6_mrouter; /* multicast routing daemon */ 190extern int ip6_sendredirects; /* send IP redirects when forwarding? */ 191extern int ip6_maxfragpackets; /* Maximum packets in reassembly queue */ 192extern int ip6_sourcecheck; /* Verify source interface */ 193extern int ip6_sourcecheck_interval; /* Interval between log messages */ 194extern int ip6_accept_rtadv; /* Acts as a host not a router */ 195extern int ip6_keepfaith; /* Firewall Aided Internet Translator */ 196extern int ip6_log_interval; 197extern time_t ip6_log_time; 198extern int ip6_hdrnestlimit; /* upper limit of # of extension headers */ 199extern int ip6_dad_count; /* DupAddrDetectionTransmits */ 200 201extern u_int32_t ip6_flow_seq; 202extern int ip6_auto_flowlabel; 203 204extern struct pr_usrreqs rip6_usrreqs; 205struct sockopt; 206struct inpcb; 207 208int icmp6_ctloutput __P((struct socket *, struct sockopt *sopt)); 209 210void ip6_init __P((void)); 211void ip6intr __P((void)); 212void ip6_input __P((struct mbuf *)); 213void ip6_freemoptions __P((struct ip6_moptions *)); 214int ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int)); 215char * ip6_get_prevhdr __P((struct mbuf *, int)); 216int ip6_mforward __P((struct ip6_hdr *, struct ifnet *, struct mbuf *)); 217int ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *, 218 u_int32_t *)); 219void ip6_savecontrol __P((struct inpcb *, struct mbuf **, struct ip6_hdr *, 220 struct mbuf *)); 221int ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); 222 223void ip6_forward __P((struct mbuf *, int)); 224 225void ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *)); 226int ip6_output __P((struct mbuf *, struct ip6_pktopts *, 227 struct route_in6 *, int, 228 struct ip6_moptions *, struct ifnet **)); 229int ip6_ctloutput __P((struct socket *, struct sockopt *sopt)); 230int ip6_setpktoptions __P((struct mbuf *, struct ip6_pktopts *, int)); 231int ip6_optlen __P((struct inpcb *)); 232 233int route6_input __P((struct mbuf **, int *, int)); 234 235void frag6_init __P((void)); 236int frag6_input __P((struct mbuf **, int *, int)); 237void frag6_slowtimo __P((void)); 238void frag6_drain __P((void)); 239 240void rip6_init __P((void)); 241int rip6_input __P((struct mbuf **mp, int *offp, int proto)); 242int rip6_ctloutput __P((struct socket *so, struct sockopt *sopt)); 243int rip6_output __P((struct mbuf *, ...)); 244int rip6_usrreq __P((struct socket *, 245 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *)); 246 247int dest6_input __P((struct mbuf **, int *, int)); 248int none_input __P((struct mbuf **, int *, int)); 249#endif /* _KERNEL */ 250 251#endif /* !_NETINET6_IP6_VAR_H_ */ 252