ip_var.h revision 60765
1219820Sjeff/* 2219820Sjeff * Copyright (c) 1982, 1986, 1993 3219820Sjeff * The Regents of the University of California. All rights reserved. 4219820Sjeff * 5219820Sjeff * Redistribution and use in source and binary forms, with or without 6219820Sjeff * modification, are permitted provided that the following conditions 7219820Sjeff * are met: 8219820Sjeff * 1. Redistributions of source code must retain the above copyright 9219820Sjeff * notice, this list of conditions and the following disclaimer. 10219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 11219820Sjeff * notice, this list of conditions and the following disclaimer in the 12219820Sjeff * documentation and/or other materials provided with the distribution. 13219820Sjeff * 3. All advertising materials mentioning features or use of this software 14219820Sjeff * must display the following acknowledgement: 15219820Sjeff * This product includes software developed by the University of 16219820Sjeff * California, Berkeley and its contributors. 17219820Sjeff * 4. Neither the name of the University nor the names of its contributors 18219820Sjeff * may be used to endorse or promote products derived from this software 19219820Sjeff * without specific prior written permission. 20219820Sjeff * 21219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22219820Sjeff * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23219820Sjeff * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24219820Sjeff * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25219820Sjeff * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26219820Sjeff * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27219820Sjeff * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28219820Sjeff * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29219820Sjeff * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30219820Sjeff * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31219820Sjeff * SUCH DAMAGE. 32219820Sjeff * 33219820Sjeff * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 34219820Sjeff * $FreeBSD: head/sys/netinet/ip_var.h 60765 2000-05-21 21:26:06Z jlemon $ 35219820Sjeff */ 36219820Sjeff 37219820Sjeff#ifndef _NETINET_IP_VAR_H_ 38219820Sjeff#define _NETINET_IP_VAR_H_ 39219820Sjeff 40219820Sjeff/* 41219820Sjeff * Overlay for ip header used by other protocols (tcp, udp). 42219820Sjeff */ 43219820Sjeffstruct ipovly { 44219820Sjeff u_char ih_x1[9]; /* (unused) */ 45219820Sjeff u_char ih_pr; /* protocol */ 46219820Sjeff u_short ih_len; /* protocol length */ 47219820Sjeff struct in_addr ih_src; /* source internet address */ 48219820Sjeff struct in_addr ih_dst; /* destination internet address */ 49219820Sjeff}; 50219820Sjeff 51219820Sjeff/* 52219820Sjeff * Ip reassembly queue structure. Each fragment 53219820Sjeff * being reassembled is attached to one of these structures. 54219820Sjeff * They are timed out after ipq_ttl drops to 0, and may also 55219820Sjeff * be reclaimed if memory becomes tight. 56219820Sjeff */ 57219820Sjeffstruct ipq { 58219820Sjeff struct ipq *next,*prev; /* to other reass headers */ 59219820Sjeff u_char ipq_ttl; /* time for reass q to live */ 60219820Sjeff u_char ipq_p; /* protocol of this fragment */ 61219820Sjeff u_short ipq_id; /* sequence id for reassembly */ 62219820Sjeff struct mbuf *ipq_frags; /* to ip headers of fragments */ 63219820Sjeff struct in_addr ipq_src,ipq_dst; 64219820Sjeff#ifdef IPDIVERT 65219820Sjeff u_int32_t ipq_div_info; /* ipfw divert port & flags */ 66219820Sjeff u_int16_t ipq_div_cookie; /* ipfw divert cookie */ 67219820Sjeff#endif 68219820Sjeff}; 69219820Sjeff 70219820Sjeff/* 71219820Sjeff * Structure stored in mbuf in inpcb.ip_options 72219820Sjeff * and passed to ip_output when ip options are in use. 73219820Sjeff * The actual length of the options (including ipopt_dst) 74219820Sjeff * is in m_len. 75219820Sjeff */ 76219820Sjeff#define MAX_IPOPTLEN 40 77219820Sjeff 78219820Sjeffstruct ipoption { 79219820Sjeff struct in_addr ipopt_dst; /* first-hop dst if source routed */ 80219820Sjeff char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 81219820Sjeff}; 82219820Sjeff 83219820Sjeff/* 84219820Sjeff * Structure attached to inpcb.ip_moptions and 85219820Sjeff * passed to ip_output when IP multicast options are in use. 86219820Sjeff */ 87219820Sjeffstruct ip_moptions { 88219820Sjeff struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 89219820Sjeff u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 90219820Sjeff u_char imo_multicast_loop; /* 1 => hear sends if a member */ 91219820Sjeff u_short imo_num_memberships; /* no. memberships this socket */ 92219820Sjeff struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 93219820Sjeff u_long imo_multicast_vif; /* vif num outgoing multicasts */ 94219820Sjeff}; 95219820Sjeff 96219820Sjeffstruct ipstat { 97219820Sjeff u_long ips_total; /* total packets received */ 98219820Sjeff u_long ips_badsum; /* checksum bad */ 99219820Sjeff u_long ips_tooshort; /* packet too short */ 100219820Sjeff u_long ips_toosmall; /* not enough data */ 101219820Sjeff u_long ips_badhlen; /* ip header length < data size */ 102219820Sjeff u_long ips_badlen; /* ip length < ip header length */ 103219820Sjeff u_long ips_fragments; /* fragments received */ 104219820Sjeff u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 105219820Sjeff u_long ips_fragtimeout; /* fragments timed out */ 106219820Sjeff u_long ips_forward; /* packets forwarded */ 107219820Sjeff u_long ips_fastforward; /* packets fast forwarded */ 108219820Sjeff u_long ips_cantforward; /* packets rcvd for unreachable dest */ 109219820Sjeff u_long ips_redirectsent; /* packets forwarded on same net */ 110219820Sjeff u_long ips_noproto; /* unknown or unsupported protocol */ 111219820Sjeff u_long ips_delivered; /* datagrams delivered to upper level*/ 112219820Sjeff u_long ips_localout; /* total ip packets generated here */ 113219820Sjeff u_long ips_odropped; /* lost packets due to nobufs, etc. */ 114219820Sjeff u_long ips_reassembled; /* total packets reassembled ok */ 115219820Sjeff u_long ips_fragmented; /* datagrams successfully fragmented */ 116219820Sjeff u_long ips_ofragments; /* output fragments created */ 117219820Sjeff u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 118219820Sjeff u_long ips_badoptions; /* error in option processing */ 119219820Sjeff u_long ips_noroute; /* packets discarded due to no route */ 120219820Sjeff u_long ips_badvers; /* ip version != 4 */ 121219820Sjeff u_long ips_rawout; /* total raw ip packets generated */ 122219820Sjeff u_long ips_toolong; /* ip length > max ip packet size */ 123219820Sjeff u_long ips_notmember; /* multicasts for unregistered grps */ 124219820Sjeff u_long ips_nogif; /* no match gif found */ 125219820Sjeff}; 126219820Sjeff 127219820Sjeff#ifdef _KERNEL 128219820Sjeff 129219820Sjeff/* flags passed to ip_output as last parameter */ 130219820Sjeff#define IP_FORWARDING 0x1 /* most of ip header exists */ 131219820Sjeff#define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 132219820Sjeff#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 133219820Sjeff#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 134219820Sjeff#define IP_SOCKINMRCVIF 0x100 /* IPSEC hack; 135219820Sjeff * socket pointer in sending 136219820Sjeff * packet's m_pkthdr.rcvif */ 137219820Sjeff 138219820Sjeffstruct ip; 139219820Sjeffstruct inpcb; 140219820Sjeffstruct route; 141219820Sjeffstruct sockopt; 142219820Sjeff 143248084Sattilioextern struct ipstat ipstat; 144219820Sjeffextern u_short ip_id; /* ip packet ctr, for ids */ 145219820Sjeffextern int ip_defttl; /* default IP ttl */ 146248084Sattilioextern int ipforwarding; /* ip forwarding */ 147219820Sjeffextern u_char ip_protox[]; 148219820Sjeffextern struct socket *ip_rsvpd; /* reservation protocol daemon */ 149219820Sjeffextern struct socket *ip_mrouter; /* multicast routing daemon */ 150219820Sjeffextern int (*legal_vif_num) __P((int)); 151219820Sjeffextern u_long (*ip_mcast_src) __P((int)); 152219820Sjeffextern int rsvp_on; 153219820Sjeffextern struct pr_usrreqs rip_usrreqs; 154248084Sattilio 155219820Sjeffint ip_ctloutput __P((struct socket *, struct sockopt *sopt)); 156219820Sjeffvoid ip_drain __P((void)); 157219820Sjeffvoid ip_freemoptions __P((struct ip_moptions *)); 158219820Sjeffvoid ip_init __P((void)); 159219820Sjeffextern int (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *, 160219820Sjeff struct ip_moptions *)); 161219820Sjeffint ip_output __P((struct mbuf *, 162219820Sjeff struct mbuf *, struct route *, int, struct ip_moptions *)); 163219820Sjeffvoid ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *, 164219820Sjeff struct mbuf *)); 165219820Sjeffvoid ip_slowtimo __P((void)); 166219820Sjeffstruct mbuf * 167219820Sjeff ip_srcroute __P((void)); 168219820Sjeffvoid ip_stripoptions __P((struct mbuf *, struct mbuf *)); 169219820Sjeffint rip_ctloutput __P((struct socket *, struct sockopt *)); 170219820Sjeffvoid rip_ctlinput __P((int, struct sockaddr *, void *)); 171219820Sjeffvoid rip_init __P((void)); 172219820Sjeffvoid rip_input __P((struct mbuf *, int, int)); 173219820Sjeffint rip_output __P((struct mbuf *, struct socket *, u_long)); 174219820Sjeffvoid ipip_input __P((struct mbuf *, int, int)); 175219820Sjeffvoid rsvp_input __P((struct mbuf *, int, int)); 176219820Sjeffint ip_rsvp_init __P((struct socket *)); 177219820Sjeffint ip_rsvp_done __P((void)); 178219820Sjeffint ip_rsvp_vif_init __P((struct socket *, struct sockopt *)); 179219820Sjeffint ip_rsvp_vif_done __P((struct socket *, struct sockopt *)); 180219820Sjeffvoid ip_rsvp_force_done __P((struct socket *)); 181219820Sjeff 182219820Sjeff#ifdef IPDIVERT 183219820Sjeffvoid div_init __P((void)); 184219820Sjeffvoid div_input __P((struct mbuf *, int, int)); 185219820Sjeffvoid divert_packet __P((struct mbuf *, int, int)); 186219820Sjeffextern struct pr_usrreqs div_usrreqs; 187219820Sjeffextern u_int16_t ip_divert_cookie; 188219820Sjeff#endif 189219820Sjeff 190219820Sjeffextern struct sockaddr_in *ip_fw_fwd_addr; 191219820Sjeff 192219820Sjeffvoid in_delayed_cksum(struct mbuf *m); 193219820Sjeff 194219820Sjeff#endif /* _KERNEL */ 195219820Sjeff 196219820Sjeff#endif /* !_NETINET_IP_VAR_H_ */ 197219820Sjeff