ip_var.h revision 55009
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 * $FreeBSD: head/sys/netinet/ip_var.h 55009 1999-12-22 19:13:38Z shin $ 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 u_char ih_x1[9]; /* (unused) */ 45 u_char ih_pr; /* protocol */ 46 u_short ih_len; /* protocol length */ 47 struct in_addr ih_src; /* source internet address */ 48 struct in_addr ih_dst; /* destination internet address */ 49}; 50 51/* 52 * Ip reassembly queue structure. Each fragment 53 * being reassembled is attached to one of these structures. 54 * They are timed out after ipq_ttl drops to 0, and may also 55 * 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#define IP_SOCKINMRCVIF 0x100 /* IPSEC hack; 135 * socket pointer in sending 136 * packet's m_pkthdr.rcvif */ 137 138struct ip; 139struct inpcb; 140struct route; 141struct sockopt; 142 143extern struct ipstat ipstat; 144extern u_short ip_id; /* ip packet ctr, for ids */ 145extern int ip_defttl; /* default IP ttl */ 146extern int ipforwarding; /* ip forwarding */ 147extern u_char ip_protox[]; 148extern struct socket *ip_rsvpd; /* reservation protocol daemon */ 149extern struct socket *ip_mrouter; /* multicast routing daemon */ 150extern int (*legal_vif_num) __P((int)); 151extern u_long (*ip_mcast_src) __P((int)); 152extern int rsvp_on; 153extern struct pr_usrreqs rip_usrreqs; 154 155int ip_ctloutput __P((struct socket *, struct sockopt *sopt)); 156void ip_drain __P((void)); 157void ip_freemoptions __P((struct ip_moptions *)); 158void ip_init __P((void)); 159extern int (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *, 160 struct ip_moptions *)); 161int ip_output __P((struct mbuf *, 162 struct mbuf *, struct route *, int, struct ip_moptions *)); 163void ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *, 164 struct mbuf *)); 165void ip_slowtimo __P((void)); 166struct mbuf * 167 ip_srcroute __P((void)); 168void ip_stripoptions __P((struct mbuf *, struct mbuf *)); 169int rip_ctloutput __P((struct socket *, struct sockopt *)); 170void rip_ctlinput __P((int, struct sockaddr *, void *)); 171void rip_init __P((void)); 172void rip_input __P((struct mbuf *, int, int)); 173int rip_output __P((struct mbuf *, struct socket *, u_long)); 174void ipip_input __P((struct mbuf *, int, int)); 175void rsvp_input __P((struct mbuf *, int, int)); 176int ip_rsvp_init __P((struct socket *)); 177int ip_rsvp_done __P((void)); 178int ip_rsvp_vif_init __P((struct socket *, struct sockopt *)); 179int ip_rsvp_vif_done __P((struct socket *, struct sockopt *)); 180void ip_rsvp_force_done __P((struct socket *)); 181 182#ifdef IPDIVERT 183void div_init __P((void)); 184void div_input __P((struct mbuf *, int, int)); 185void divert_packet __P((struct mbuf *, int, int)); 186extern struct pr_usrreqs div_usrreqs; 187extern u_int16_t ip_divert_cookie; 188#endif 189 190extern struct sockaddr_in *ip_fw_fwd_addr; 191 192#endif /* KERNEL */ 193 194#endif /* !_NETINET_IP_VAR_H_ */ 195