ip_var.h revision 55205
19313Ssos/* 29313Ssos * Copyright (c) 1982, 1986, 1993 39313Ssos * The Regents of the University of California. All rights reserved. 49313Ssos * 59313Ssos * Redistribution and use in source and binary forms, with or without 69313Ssos * modification, are permitted provided that the following conditions 79313Ssos * are met: 89313Ssos * 1. Redistributions of source code must retain the above copyright 99313Ssos * notice, this list of conditions and the following disclaimer. 109313Ssos * 2. Redistributions in binary form must reproduce the above copyright 119313Ssos * notice, this list of conditions and the following disclaimer in the 129313Ssos * documentation and/or other materials provided with the distribution. 139313Ssos * 3. All advertising materials mentioning features or use of this software 149313Ssos * must display the following acknowledgement: 159313Ssos * This product includes software developed by the University of 169313Ssos * California, Berkeley and its contributors. 179313Ssos * 4. Neither the name of the University nor the names of its contributors 189313Ssos * may be used to endorse or promote products derived from this software 199313Ssos * without specific prior written permission. 209313Ssos * 219313Ssos * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 229313Ssos * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 239313Ssos * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 249313Ssos * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 259313Ssos * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 269313Ssos * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 279313Ssos * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2842499Seivind * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 299313Ssos * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 309313Ssos * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3131784Seivind * SUCH DAMAGE. 3231784Seivind * 339313Ssos * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 349313Ssos * $FreeBSD: head/sys/netinet/ip_var.h 55205 1999-12-29 04:46:21Z peter $ 3512458Sbde */ 369313Ssos 379313Ssos#ifndef _NETINET_IP_VAR_H_ 389313Ssos#define _NETINET_IP_VAR_H_ 3931561Sbde 409313Ssos/* 419313Ssos * Overlay for ip header used by other protocols (tcp, udp). 429313Ssos */ 439313Ssosstruct ipovly { 4414331Speter u_char ih_x1[9]; /* (unused) */ 4514331Speter u_char ih_pr; /* protocol */ 4612458Sbde u_short ih_len; /* protocol length */ 4712458Sbde struct in_addr ih_src; /* source internet address */ 4814331Speter struct in_addr ih_dst; /* destination internet address */ 4914331Speter}; 509313Ssos 519313Ssos/* 5230994Sphk * Ip reassembly queue structure. Each fragment 539313Ssos * being reassembled is attached to one of these structures. 5412858Speter * They are timed out after ipq_ttl drops to 0, and may also 559313Ssos * be reclaimed if memory becomes tight. 569313Ssos */ 579313Ssosstruct ipq { 5812858Speter struct ipq *next,*prev; /* to other reass headers */ 5914331Speter u_char ipq_ttl; /* time for reass q to live */ 609313Ssos u_char ipq_p; /* protocol of this fragment */ 6114331Speter u_short ipq_id; /* sequence id for reassembly */ 6214331Speter struct mbuf *ipq_frags; /* to ip headers of fragments */ 6314331Speter struct in_addr ipq_src,ipq_dst; 649313Ssos#ifdef IPDIVERT 659313Ssos u_int32_t ipq_div_info; /* ipfw divert port & flags */ 669313Ssos u_int16_t ipq_div_cookie; /* ipfw divert cookie */ 679313Ssos#endif 689313Ssos}; 699313Ssos 709313Ssos/* 7130994Sphk * Structure stored in mbuf in inpcb.ip_options 729313Ssos * and passed to ip_output when ip options are in use. 739313Ssos * The actual length of the options (including ipopt_dst) 749313Ssos * is in m_len. 7530994Sphk */ 769313Ssos#define MAX_IPOPTLEN 40 7712858Speter 789313Ssosstruct ipoption { 799313Ssos struct in_addr ipopt_dst; /* first-hop dst if source routed */ 809313Ssos char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 8112858Speter}; 829313Ssos 8314331Speter/* 8414331Speter * Structure attached to inpcb.ip_moptions and 8514331Speter * passed to ip_output when IP multicast options are in use. 869313Ssos */ 8714331Speterstruct ip_moptions { 8814331Speter struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 8914331Speter u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 9014331Speter u_char imo_multicast_loop; /* 1 => hear sends if a member */ 9114331Speter u_short imo_num_memberships; /* no. memberships this socket */ 929313Ssos struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 939313Ssos u_long imo_multicast_vif; /* vif num outgoing multicasts */ 949313Ssos}; 959313Ssos 969313Ssosstruct ipstat { 979313Ssos u_long ips_total; /* total packets received */ 989313Ssos u_long ips_badsum; /* checksum bad */ 999313Ssos u_long ips_tooshort; /* packet too short */ 1009313Ssos u_long ips_toosmall; /* not enough data */ 1019313Ssos u_long ips_badhlen; /* ip header length < data size */ 1029313Ssos u_long ips_badlen; /* ip length < ip header length */ 1039313Ssos u_long ips_fragments; /* fragments received */ 1049313Ssos u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 1059313Ssos u_long ips_fragtimeout; /* fragments timed out */ 1069313Ssos u_long ips_forward; /* packets forwarded */ 1079313Ssos u_long ips_fastforward; /* packets fast forwarded */ 1089313Ssos u_long ips_cantforward; /* packets rcvd for unreachable dest */ 1099313Ssos u_long ips_redirectsent; /* packets forwarded on same net */ 1109313Ssos u_long ips_noproto; /* unknown or unsupported protocol */ 1119313Ssos u_long ips_delivered; /* datagrams delivered to upper level*/ 1129313Ssos u_long ips_localout; /* total ip packets generated here */ 1139313Ssos u_long ips_odropped; /* lost packets due to nobufs, etc. */ 1149313Ssos u_long ips_reassembled; /* total packets reassembled ok */ 1159313Ssos u_long ips_fragmented; /* datagrams successfully fragmented */ 1169313Ssos u_long ips_ofragments; /* output fragments created */ 1179313Ssos u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 1189313Ssos u_long ips_badoptions; /* error in option processing */ 1199313Ssos u_long ips_noroute; /* packets discarded due to no route */ 1209313Ssos u_long ips_badvers; /* ip version != 4 */ 1219313Ssos u_long ips_rawout; /* total raw ip packets generated */ 1229313Ssos u_long ips_toolong; /* ip length > max ip packet size */ 1239313Ssos u_long ips_notmember; /* multicasts for unregistered grps */ 12430994Sphk u_long ips_nogif; /* no match gif found */ 1259313Ssos}; 1269313Ssos 1279313Ssos#ifdef _KERNEL 12830994Sphk 1299313Ssos/* flags passed to ip_output as last parameter */ 1309313Ssos#define IP_FORWARDING 0x1 /* most of ip header exists */ 1319313Ssos#define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 1329313Ssos#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 13314331Speter#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 13414331Speter#define IP_SOCKINMRCVIF 0x100 /* IPSEC hack; 13514331Speter * socket pointer in sending 13614331Speter * packet's m_pkthdr.rcvif */ 1379313Ssos 1389313Ssosstruct ip; 1399313Ssosstruct inpcb; 1409313Ssosstruct route; 1419313Ssosstruct sockopt; 1429313Ssos 1439313Ssosextern struct ipstat ipstat; 1449313Ssosextern u_short ip_id; /* ip packet ctr, for ids */ 1459313Ssosextern int ip_defttl; /* default IP ttl */ 1469313Ssosextern int ipforwarding; /* ip forwarding */ 1479313Ssosextern u_char ip_protox[]; 1489313Ssosextern struct socket *ip_rsvpd; /* reservation protocol daemon */ 1499313Ssosextern struct socket *ip_mrouter; /* multicast routing daemon */ 1509313Ssosextern int (*legal_vif_num) __P((int)); 1519313Ssosextern u_long (*ip_mcast_src) __P((int)); 1529313Ssosextern int rsvp_on; 1539313Ssosextern struct pr_usrreqs rip_usrreqs; 1549313Ssos 1559313Ssosint ip_ctloutput __P((struct socket *, struct sockopt *sopt)); 1569313Ssosvoid ip_drain __P((void)); 1579313Ssosvoid ip_freemoptions __P((struct ip_moptions *)); 1589313Ssosvoid ip_init __P((void)); 1599313Ssosextern int (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *, 1609313Ssos struct ip_moptions *)); 1619313Ssosint ip_output __P((struct mbuf *, 1629313Ssos struct mbuf *, struct route *, int, struct ip_moptions *)); 1639313Ssosvoid ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *, 1649313Ssos struct mbuf *)); 1659313Ssosvoid ip_slowtimo __P((void)); 1669313Ssosstruct mbuf * 1679313Ssos ip_srcroute __P((void)); 1689313Ssosvoid ip_stripoptions __P((struct mbuf *, struct mbuf *)); 1699313Ssosint rip_ctloutput __P((struct socket *, struct sockopt *)); 1709313Ssosvoid rip_ctlinput __P((int, struct sockaddr *, void *)); 1719313Ssosvoid rip_init __P((void)); 1729313Ssosvoid rip_input __P((struct mbuf *, int, int)); 1739313Ssosint rip_output __P((struct mbuf *, struct socket *, u_long)); 1749313Ssosvoid ipip_input __P((struct mbuf *, int, int)); 1759313Ssosvoid rsvp_input __P((struct mbuf *, int, int)); 1769313Ssosint ip_rsvp_init __P((struct socket *)); 1779313Ssosint ip_rsvp_done __P((void)); 1789313Ssosint ip_rsvp_vif_init __P((struct socket *, struct sockopt *)); 1799313Ssosint ip_rsvp_vif_done __P((struct socket *, struct sockopt *)); 1809313Ssosvoid ip_rsvp_force_done __P((struct socket *)); 1819313Ssos 1829313Ssos#ifdef IPDIVERT 1839313Ssosvoid div_init __P((void)); 1849313Ssosvoid div_input __P((struct mbuf *, int, int)); 1859313Ssosvoid divert_packet __P((struct mbuf *, int, int)); 1869313Ssosextern struct pr_usrreqs div_usrreqs; 1879313Ssosextern u_int16_t ip_divert_cookie; 1889313Ssos#endif 18930994Sphk 1909313Ssosextern struct sockaddr_in *ip_fw_fwd_addr; 1919313Ssos 19212858Speter#endif /* _KERNEL */ 1939313Ssos 1949313Ssos#endif /* !_NETINET_IP_VAR_H_ */ 1959313Ssos