ip_var.h revision 36192
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 1.34 1997/09/07 05:26:46 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#endif 69}; 70 71/* 72 * Ip header, when holding a fragment. 73 * 74 * Note: ipf_next must be at same offset as ipq_next above 75 */ 76struct ipasfrag { 77#if BYTE_ORDER == LITTLE_ENDIAN 78 u_char ip_hl:4, 79 ip_v:4; 80#endif 81#if BYTE_ORDER == BIG_ENDIAN 82 u_char ip_v:4, 83 ip_hl:4; 84#endif 85 u_char ipf_mff; /* XXX overlays ip_tos: use low bit 86 * to avoid destroying tos; 87 * copied from (ip_off&IP_MF) */ 88 u_short ip_len; 89 u_short ip_id; 90 u_short ip_off; 91 u_char ip_ttl; 92 u_char ip_p; 93 u_short ip_sum; 94 struct ipasfrag *ipf_next; /* next fragment */ 95 struct ipasfrag *ipf_prev; /* previous fragment */ 96}; 97 98/* 99 * Structure stored in mbuf in inpcb.ip_options 100 * and passed to ip_output when ip options are in use. 101 * The actual length of the options (including ipopt_dst) 102 * is in m_len. 103 */ 104#define MAX_IPOPTLEN 40 105 106struct ipoption { 107 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 108 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 109}; 110 111/* 112 * Structure attached to inpcb.ip_moptions and 113 * passed to ip_output when IP multicast options are in use. 114 */ 115struct ip_moptions { 116 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 117 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 118 u_char imo_multicast_loop; /* 1 => hear sends if a member */ 119 u_short imo_num_memberships; /* no. memberships this socket */ 120 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 121 u_long imo_multicast_vif; /* vif num outgoing multicasts */ 122}; 123 124struct ipstat { 125 u_long ips_total; /* total packets received */ 126 u_long ips_badsum; /* checksum bad */ 127 u_long ips_tooshort; /* packet too short */ 128 u_long ips_toosmall; /* not enough data */ 129 u_long ips_badhlen; /* ip header length < data size */ 130 u_long ips_badlen; /* ip length < ip header length */ 131 u_long ips_fragments; /* fragments received */ 132 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 133 u_long ips_fragtimeout; /* fragments timed out */ 134 u_long ips_forward; /* packets forwarded */ 135 u_long ips_fastforward; /* packets fast forwarded */ 136 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 137 u_long ips_redirectsent; /* packets forwarded on same net */ 138 u_long ips_noproto; /* unknown or unsupported protocol */ 139 u_long ips_delivered; /* datagrams delivered to upper level*/ 140 u_long ips_localout; /* total ip packets generated here */ 141 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 142 u_long ips_reassembled; /* total packets reassembled ok */ 143 u_long ips_fragmented; /* datagrams successfully fragmented */ 144 u_long ips_ofragments; /* output fragments created */ 145 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 146 u_long ips_badoptions; /* error in option processing */ 147 u_long ips_noroute; /* packets discarded due to no route */ 148 u_long ips_badvers; /* ip version != 4 */ 149 u_long ips_rawout; /* total raw ip packets generated */ 150 u_long ips_toolong; /* ip length > max ip packet size */ 151 u_long ips_notmember; /* multicasts for unregistered grps */ 152}; 153 154#define IPFLOW_HASHBITS 6 /* should not be a multiple of 8 */ 155struct ipflow { 156 LIST_ENTRY(ipflow) ipf_next; /* next ipflow in bucket */ 157 struct in_addr ipf_dst; /* destination address */ 158 struct in_addr ipf_src; /* source address */ 159 160 u_int8_t ipf_tos; /* type-of-service */ 161 struct route ipf_ro; /* associated route entry */ 162 u_long ipf_uses; /* number of uses in this period */ 163 164 int ipf_timer; /* remaining lifetime of this entry */ 165 u_long ipf_dropped; /* ENOBUFS returned by if_output */ 166 u_long ipf_errors; /* other errors returned by if_output */ 167 u_long ipf_last_uses; /* number of uses in last period */ 168}; 169 170#ifdef KERNEL 171/* flags passed to ip_output as last parameter */ 172#define IP_FORWARDING 0x1 /* most of ip header exists */ 173#define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 174#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 175#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 176 177struct inpcb; 178struct route; 179 180extern struct ipstat ipstat; 181extern u_short ip_id; /* ip packet ctr, for ids */ 182extern int ip_defttl; /* default IP ttl */ 183extern int ipforwarding; /* ip forwarding */ 184extern u_char ip_protox[]; 185extern struct socket *ip_rsvpd; /* reservation protocol daemon */ 186extern struct socket *ip_mrouter; /* multicast routing daemon */ 187extern int (*legal_vif_num) __P((int)); 188extern u_long (*ip_mcast_src) __P((int)); 189extern int rsvp_on; 190extern struct pr_usrreqs rip_usrreqs; 191 192int ip_ctloutput __P((int, struct socket *, int, int, struct mbuf **, 193 struct proc *)); 194void ip_drain __P((void)); 195void ip_freemoptions __P((struct ip_moptions *)); 196void ip_init __P((void)); 197extern int (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *, 198 struct ip_moptions *)); 199int ip_output __P((struct mbuf *, 200 struct mbuf *, struct route *, int, struct ip_moptions *)); 201void ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *, 202 struct mbuf *)); 203void ip_slowtimo __P((void)); 204struct mbuf * 205 ip_srcroute __P((void)); 206void ip_stripoptions __P((struct mbuf *, struct mbuf *)); 207int rip_ctloutput __P((int, struct socket *, int, int, struct mbuf **, 208 struct proc *p)); 209void rip_ctlinput __P((int, struct sockaddr *, void *)); 210void rip_init __P((void)); 211void rip_input __P((struct mbuf *, int)); 212int rip_output __P((struct mbuf *, struct socket *, u_long)); 213void ipip_input __P((struct mbuf *, int)); 214void rsvp_input __P((struct mbuf *, int)); 215int ip_rsvp_init __P((struct socket *)); 216int ip_rsvp_done __P((void)); 217int ip_rsvp_vif_init __P((struct socket *, struct mbuf *)); 218int ip_rsvp_vif_done __P((struct socket *, struct mbuf *)); 219void ip_rsvp_force_done __P((struct socket *)); 220 221#ifdef IPDIVERT 222void div_init __P((void)); 223void div_input __P((struct mbuf *, int)); 224extern struct pr_usrreqs div_usrreqs; 225extern u_short ip_divert_port; 226extern u_short ip_divert_ignore; 227#endif /* IPDIVERT */ 228 229#endif /* KERNEL */ 230 231#endif /* _NETINET_IP_VAR_H_ */ 232