ip_var.h revision 62587
12Sjlaskey/* 26Sjlaskey * Copyright (c) 1982, 1986, 1993 32Sjlaskey * The Regents of the University of California. All rights reserved. 4877Sattila * 52Sjlaskey * Redistribution and use in source and binary forms, with or without 62Sjlaskey * modification, are permitted provided that the following conditions 72Sjlaskey * are met: 8877Sattila * 1. Redistributions of source code must retain the above copyright 92Sjlaskey * notice, this list of conditions and the following disclaimer. 102Sjlaskey * 2. Redistributions in binary form must reproduce the above copyright 112Sjlaskey * notice, this list of conditions and the following disclaimer in the 122Sjlaskey * documentation and/or other materials provided with the distribution. 132Sjlaskey * 3. All advertising materials mentioning features or use of this software 14877Sattila * must display the following acknowledgement: 152Sjlaskey * This product includes software developed by the University of 162Sjlaskey * California, Berkeley and its contributors. 172Sjlaskey * 4. Neither the name of the University nor the names of its contributors 18877Sattila * may be used to endorse or promote products derived from this software 192Sjlaskey * without specific prior written permission. 202Sjlaskey * 212Sjlaskey * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 222Sjlaskey * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 232Sjlaskey * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 242Sjlaskey * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 252Sjlaskey * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 262Sjlaskey * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 272Sjlaskey * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 282Sjlaskey * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 292Sjlaskey * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 302Sjlaskey * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 312Sjlaskey * SUCH DAMAGE. 322Sjlaskey * 332Sjlaskey * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 342Sjlaskey * $FreeBSD: head/sys/netinet/ip_var.h 62587 2000-07-04 16:35:15Z itojun $ 352Sjlaskey */ 362Sjlaskey 372Sjlaskey#ifndef _NETINET_IP_VAR_H_ 382Sjlaskey#define _NETINET_IP_VAR_H_ 392Sjlaskey 402Sjlaskey/* 412Sjlaskey * Overlay for ip header used by other protocols (tcp, udp). 422Sjlaskey */ 432Sjlaskeystruct ipovly { 442Sjlaskey u_char ih_x1[9]; /* (unused) */ 452Sjlaskey u_char ih_pr; /* protocol */ 462Sjlaskey u_short ih_len; /* protocol length */ 472Sjlaskey struct in_addr ih_src; /* source internet address */ 482Sjlaskey struct in_addr ih_dst; /* destination internet address */ 492Sjlaskey}; 502Sjlaskey 512Sjlaskey/* 522Sjlaskey * Ip reassembly queue structure. Each fragment 532Sjlaskey * being reassembled is attached to one of these structures. 542Sjlaskey * They are timed out after ipq_ttl drops to 0, and may also 552Sjlaskey * be reclaimed if memory becomes tight. 56 */ 57struct ipq { 58 struct ipq *next,*prev; /* to other reass headers */ 59 u_char ipq_ttl; /* time for reass q to live */ 60 u_char ipq_p; /* protocol of this fragment */ 61 u_short ipq_id; /* sequence id for reassembly */ 62 struct mbuf *ipq_frags; /* to ip headers of fragments */ 63 struct in_addr ipq_src,ipq_dst; 64#ifdef IPDIVERT 65 u_int32_t ipq_div_info; /* ipfw divert port & flags */ 66 u_int16_t ipq_div_cookie; /* ipfw divert cookie */ 67#endif 68}; 69 70/* 71 * Structure stored in mbuf in inpcb.ip_options 72 * and passed to ip_output when ip options are in use. 73 * The actual length of the options (including ipopt_dst) 74 * is in m_len. 75 */ 76#define MAX_IPOPTLEN 40 77 78struct ipoption { 79 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 80 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 81}; 82 83/* 84 * Structure attached to inpcb.ip_moptions and 85 * passed to ip_output when IP multicast options are in use. 86 */ 87struct ip_moptions { 88 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 89 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 90 u_char imo_multicast_loop; /* 1 => hear sends if a member */ 91 u_short imo_num_memberships; /* no. memberships this socket */ 92 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 93 u_long imo_multicast_vif; /* vif num outgoing multicasts */ 94}; 95 96struct ipstat { 97 u_long ips_total; /* total packets received */ 98 u_long ips_badsum; /* checksum bad */ 99 u_long ips_tooshort; /* packet too short */ 100 u_long ips_toosmall; /* not enough data */ 101 u_long ips_badhlen; /* ip header length < data size */ 102 u_long ips_badlen; /* ip length < ip header length */ 103 u_long ips_fragments; /* fragments received */ 104 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 105 u_long ips_fragtimeout; /* fragments timed out */ 106 u_long ips_forward; /* packets forwarded */ 107 u_long ips_fastforward; /* packets fast forwarded */ 108 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 109 u_long ips_redirectsent; /* packets forwarded on same net */ 110 u_long ips_noproto; /* unknown or unsupported protocol */ 111 u_long ips_delivered; /* datagrams delivered to upper level*/ 112 u_long ips_localout; /* total ip packets generated here */ 113 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 114 u_long ips_reassembled; /* total packets reassembled ok */ 115 u_long ips_fragmented; /* datagrams successfully fragmented */ 116 u_long ips_ofragments; /* output fragments created */ 117 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 118 u_long ips_badoptions; /* error in option processing */ 119 u_long ips_noroute; /* packets discarded due to no route */ 120 u_long ips_badvers; /* ip version != 4 */ 121 u_long ips_rawout; /* total raw ip packets generated */ 122 u_long ips_toolong; /* ip length > max ip packet size */ 123 u_long ips_notmember; /* multicasts for unregistered grps */ 124 u_long ips_nogif; /* no match gif found */ 125}; 126 127#ifdef _KERNEL 128 129/* flags passed to ip_output as last parameter */ 130#define IP_FORWARDING 0x1 /* most of ip header exists */ 131#define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 132#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 133#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 134 135struct ip; 136struct inpcb; 137struct route; 138struct sockopt; 139 140extern struct ipstat ipstat; 141extern u_short ip_id; /* ip packet ctr, for ids */ 142extern int ip_defttl; /* default IP ttl */ 143extern int ipforwarding; /* ip forwarding */ 144extern u_char ip_protox[]; 145extern struct socket *ip_rsvpd; /* reservation protocol daemon */ 146extern struct socket *ip_mrouter; /* multicast routing daemon */ 147extern int (*legal_vif_num) __P((int)); 148extern u_long (*ip_mcast_src) __P((int)); 149extern int rsvp_on; 150extern struct pr_usrreqs rip_usrreqs; 151 152int ip_ctloutput __P((struct socket *, struct sockopt *sopt)); 153void ip_drain __P((void)); 154void ip_freemoptions __P((struct ip_moptions *)); 155void ip_init __P((void)); 156extern int (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *, 157 struct ip_moptions *)); 158int ip_output __P((struct mbuf *, 159 struct mbuf *, struct route *, int, struct ip_moptions *)); 160void ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *, 161 struct mbuf *)); 162void ip_slowtimo __P((void)); 163struct mbuf * 164 ip_srcroute __P((void)); 165void ip_stripoptions __P((struct mbuf *, struct mbuf *)); 166int rip_ctloutput __P((struct socket *, struct sockopt *)); 167void rip_ctlinput __P((int, struct sockaddr *, void *)); 168void rip_init __P((void)); 169void rip_input __P((struct mbuf *, int, int)); 170int rip_output __P((struct mbuf *, struct socket *, u_long)); 171void ipip_input __P((struct mbuf *, int, int)); 172void rsvp_input __P((struct mbuf *, int, int)); 173int ip_rsvp_init __P((struct socket *)); 174int ip_rsvp_done __P((void)); 175int ip_rsvp_vif_init __P((struct socket *, struct sockopt *)); 176int ip_rsvp_vif_done __P((struct socket *, struct sockopt *)); 177void ip_rsvp_force_done __P((struct socket *)); 178 179#ifdef IPDIVERT 180void div_init __P((void)); 181void div_input __P((struct mbuf *, int, int)); 182void divert_packet __P((struct mbuf *, int, int)); 183extern struct pr_usrreqs div_usrreqs; 184extern u_int16_t ip_divert_cookie; 185#endif 186 187extern struct sockaddr_in *ip_fw_fwd_addr; 188 189void in_delayed_cksum(struct mbuf *m); 190 191#endif /* _KERNEL */ 192 193#endif /* !_NETINET_IP_VAR_H_ */ 194