ip_var.h revision 38482
1/* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 34 * $Id: ip_var.h,v 1.43 1998/07/13 12:20:07 bde Exp $ 35 */ 36 37#ifndef _NETINET_IP_VAR_H_ 38#define _NETINET_IP_VAR_H_ 39 40/* 41 * Overlay for ip header used by other protocols (tcp, udp). 42 */ 43struct ipovly { 44 caddr_t ih_next, ih_prev; /* for protocol sequence q's */ 45 u_char ih_x1; /* (unused) */ 46 u_char ih_pr; /* protocol */ 47 u_short ih_len; /* protocol length */ 48 struct in_addr ih_src; /* source internet address */ 49 struct in_addr ih_dst; /* destination internet address */ 50}; 51 52/* 53 * Ip reassembly queue structure. Each fragment 54 * being reassembled is attached to one of these structures. 55 * They are timed out after ipq_ttl drops to 0, and may also 56 * be reclaimed if memory becomes tight. 57 */ 58struct ipq { 59 struct ipq *next,*prev; /* to other reass headers */ 60 u_char ipq_ttl; /* time for reass q to live */ 61 u_char ipq_p; /* protocol of this fragment */ 62 u_short ipq_id; /* sequence id for reassembly */ 63 struct ipasfrag *ipq_next,*ipq_prev; 64 /* to ip headers of fragments */ 65 struct in_addr ipq_src,ipq_dst; 66#ifdef IPDIVERT 67 u_short ipq_divert; /* divert protocol port */ 68 u_short ipq_div_cookie; /* divert protocol cookie */ 69#endif 70}; 71 72/* 73 * Ip header, when holding a fragment. 74 * 75 * Note: ipf_next must be at same offset as ipq_next above 76 */ 77struct ipasfrag { 78#if BYTE_ORDER == LITTLE_ENDIAN 79 u_int ip_hl:4, 80 ip_v:4; 81#endif 82#if BYTE_ORDER == BIG_ENDIAN 83 u_int ip_v:4, 84 ip_hl:4; 85#endif 86 u_char ipf_mff; /* XXX overlays ip_tos: use low bit 87 * to avoid destroying tos; 88 * copied from (ip_off&IP_MF) */ 89 u_short ip_len; 90 u_short ip_id; 91 u_short ip_off; 92 u_char ip_ttl; 93 u_char ip_p; 94 u_short ip_sum; 95 struct ipasfrag *ipf_next; /* next fragment */ 96 struct ipasfrag *ipf_prev; /* previous fragment */ 97}; 98 99/* 100 * Structure stored in mbuf in inpcb.ip_options 101 * and passed to ip_output when ip options are in use. 102 * The actual length of the options (including ipopt_dst) 103 * is in m_len. 104 */ 105#define MAX_IPOPTLEN 40 106 107struct ipoption { 108 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 109 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 110}; 111 112/* 113 * Structure attached to inpcb.ip_moptions and 114 * passed to ip_output when IP multicast options are in use. 115 */ 116struct ip_moptions { 117 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 118 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 119 u_char imo_multicast_loop; /* 1 => hear sends if a member */ 120 u_short imo_num_memberships; /* no. memberships this socket */ 121 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 122 u_long imo_multicast_vif; /* vif num outgoing multicasts */ 123}; 124 125struct ipstat { 126 u_long ips_total; /* total packets received */ 127 u_long ips_badsum; /* checksum bad */ 128 u_long ips_tooshort; /* packet too short */ 129 u_long ips_toosmall; /* not enough data */ 130 u_long ips_badhlen; /* ip header length < data size */ 131 u_long ips_badlen; /* ip length < ip header length */ 132 u_long ips_fragments; /* fragments received */ 133 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 134 u_long ips_fragtimeout; /* fragments timed out */ 135 u_long ips_forward; /* packets forwarded */ 136 u_long ips_fastforward; /* packets fast forwarded */ 137 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 138 u_long ips_redirectsent; /* packets forwarded on same net */ 139 u_long ips_noproto; /* unknown or unsupported protocol */ 140 u_long ips_delivered; /* datagrams delivered to upper level*/ 141 u_long ips_localout; /* total ip packets generated here */ 142 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 143 u_long ips_reassembled; /* total packets reassembled ok */ 144 u_long ips_fragmented; /* datagrams successfully fragmented */ 145 u_long ips_ofragments; /* output fragments created */ 146 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 147 u_long ips_badoptions; /* error in option processing */ 148 u_long ips_noroute; /* packets discarded due to no route */ 149 u_long ips_badvers; /* ip version != 4 */ 150 u_long ips_rawout; /* total raw ip packets generated */ 151 u_long ips_toolong; /* ip length > max ip packet size */ 152 u_long ips_notmember; /* multicasts for unregistered grps */ 153}; 154 155#ifdef KERNEL 156 157/* flags passed to ip_output as last parameter */ 158#define IP_FORWARDING 0x1 /* most of ip header exists */ 159#define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 160#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 161#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 162 163struct ip; 164struct inpcb; 165struct route; 166struct sockopt; 167 168extern struct ipstat ipstat; 169extern u_short ip_id; /* ip packet ctr, for ids */ 170extern int ip_defttl; /* default IP ttl */ 171extern int ipforwarding; /* ip forwarding */ 172extern u_char ip_protox[]; 173extern struct socket *ip_rsvpd; /* reservation protocol daemon */ 174extern struct socket *ip_mrouter; /* multicast routing daemon */ 175extern int (*legal_vif_num) __P((int)); 176extern u_long (*ip_mcast_src) __P((int)); 177extern int rsvp_on; 178extern struct pr_usrreqs rip_usrreqs; 179 180int ip_ctloutput __P((struct socket *, struct sockopt *sopt)); 181void ip_drain __P((void)); 182void ip_freemoptions __P((struct ip_moptions *)); 183void ip_init __P((void)); 184extern int (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *, 185 struct ip_moptions *)); 186int ip_output __P((struct mbuf *, 187 struct mbuf *, struct route *, int, struct ip_moptions *)); 188void ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *, 189 struct mbuf *)); 190void ip_slowtimo __P((void)); 191struct mbuf * 192 ip_srcroute __P((void)); 193void ip_stripoptions __P((struct mbuf *, struct mbuf *)); 194int rip_ctloutput __P((struct socket *, struct sockopt *)); 195void rip_ctlinput __P((int, struct sockaddr *, void *)); 196void rip_init __P((void)); 197void rip_input __P((struct mbuf *, int)); 198int rip_output __P((struct mbuf *, struct socket *, u_long)); 199void ipip_input __P((struct mbuf *, int)); 200void rsvp_input __P((struct mbuf *, int)); 201int ip_rsvp_init __P((struct socket *)); 202int ip_rsvp_done __P((void)); 203int ip_rsvp_vif_init __P((struct socket *, struct sockopt *)); 204int ip_rsvp_vif_done __P((struct socket *, struct sockopt *)); 205void ip_rsvp_force_done __P((struct socket *)); 206 207#ifdef IPDIVERT 208void div_init __P((void)); 209void div_input __P((struct mbuf *, int)); 210extern struct pr_usrreqs div_usrreqs; 211extern u_short ip_divert_port; 212extern u_short ip_divert_cookie; 213#endif 214 215extern struct sockaddr_in *ip_fw_fwd_addr; 216 217#endif /* KERNEL */ 218 219#endif /* !_NETINET_IP_VAR_H_ */ 220