ip_var.h revision 105194
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 105194 2002-10-16 01:54:46Z sam $ 35 */ 36 37#ifndef _NETINET_IP_VAR_H_ 38#define _NETINET_IP_VAR_H_ 39 40#include <sys/queue.h> 41 42#ifdef _KERNEL 43#include <sys/_label.h> 44#endif 45 46/* 47 * Overlay for ip header used by other protocols (tcp, udp). 48 */ 49struct ipovly { 50 u_char ih_x1[9]; /* (unused) */ 51 u_char ih_pr; /* protocol */ 52 u_short ih_len; /* protocol length */ 53 struct in_addr ih_src; /* source internet address */ 54 struct in_addr ih_dst; /* destination internet address */ 55}; 56 57#ifdef _KERNEL 58/* 59 * Ip reassembly queue structure. Each fragment 60 * being reassembled is attached to one of these structures. 61 * They are timed out after ipq_ttl drops to 0, and may also 62 * be reclaimed if memory becomes tight. 63 */ 64struct ipq { 65 TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */ 66 u_char ipq_ttl; /* time for reass q to live */ 67 u_char ipq_p; /* protocol of this fragment */ 68 u_short ipq_id; /* sequence id for reassembly */ 69 struct mbuf *ipq_frags; /* to ip headers of fragments */ 70 struct in_addr ipq_src,ipq_dst; 71#ifdef IPDIVERT 72 u_int32_t ipq_div_info; /* ipfw divert port & flags */ 73 u_int16_t ipq_div_cookie; /* ipfw divert cookie */ 74#endif 75 struct label ipq_label; /* MAC label */ 76}; 77#endif /* _KERNEL */ 78 79/* 80 * Structure stored in mbuf in inpcb.ip_options 81 * and passed to ip_output when ip options are in use. 82 * The actual length of the options (including ipopt_dst) 83 * is in m_len. 84 */ 85#define MAX_IPOPTLEN 40 86 87struct ipoption { 88 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 89 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 90}; 91 92/* 93 * Structure attached to inpcb.ip_moptions and 94 * passed to ip_output when IP multicast options are in use. 95 */ 96struct ip_moptions { 97 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 98 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ 99 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 100 u_char imo_multicast_loop; /* 1 => hear sends if a member */ 101 u_short imo_num_memberships; /* no. memberships this socket */ 102 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 103 u_long imo_multicast_vif; /* vif num outgoing multicasts */ 104}; 105 106struct ipstat { 107 u_long ips_total; /* total packets received */ 108 u_long ips_badsum; /* checksum bad */ 109 u_long ips_tooshort; /* packet too short */ 110 u_long ips_toosmall; /* not enough data */ 111 u_long ips_badhlen; /* ip header length < data size */ 112 u_long ips_badlen; /* ip length < ip header length */ 113 u_long ips_fragments; /* fragments received */ 114 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 115 u_long ips_fragtimeout; /* fragments timed out */ 116 u_long ips_forward; /* packets forwarded */ 117 u_long ips_fastforward; /* packets fast forwarded */ 118 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 119 u_long ips_redirectsent; /* packets forwarded on same net */ 120 u_long ips_noproto; /* unknown or unsupported protocol */ 121 u_long ips_delivered; /* datagrams delivered to upper level*/ 122 u_long ips_localout; /* total ip packets generated here */ 123 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 124 u_long ips_reassembled; /* total packets reassembled ok */ 125 u_long ips_fragmented; /* datagrams successfully fragmented */ 126 u_long ips_ofragments; /* output fragments created */ 127 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 128 u_long ips_badoptions; /* error in option processing */ 129 u_long ips_noroute; /* packets discarded due to no route */ 130 u_long ips_badvers; /* ip version != 4 */ 131 u_long ips_rawout; /* total raw ip packets generated */ 132 u_long ips_toolong; /* ip length > max ip packet size */ 133 u_long ips_notmember; /* multicasts for unregistered grps */ 134 u_long ips_nogif; /* no match gif found */ 135 u_long ips_badaddr; /* invalid address on header */ 136}; 137 138#ifdef _KERNEL 139 140/* flags passed to ip_output as last parameter */ 141#define IP_FORWARDING 0x1 /* most of ip header exists */ 142#define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 143#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 144#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 145 146struct ip; 147struct inpcb; 148struct route; 149struct sockopt; 150 151extern struct ipstat ipstat; 152#ifndef RANDOM_IP_ID 153extern u_short ip_id; /* ip packet ctr, for ids */ 154#endif 155extern int ip_defttl; /* default IP ttl */ 156extern int ipforwarding; /* ip forwarding */ 157extern struct route ipforward_rt; /* ip forwarding cached route */ 158extern u_char ip_protox[]; 159extern struct socket *ip_rsvpd; /* reservation protocol daemon */ 160extern struct socket *ip_mrouter; /* multicast routing daemon */ 161extern int (*legal_vif_num)(int); 162extern u_long (*ip_mcast_src)(int); 163extern int rsvp_on; 164extern struct pr_usrreqs rip_usrreqs; 165 166int ip_ctloutput(struct socket *, struct sockopt *sopt); 167void ip_drain(void); 168void ip_freemoptions(struct ip_moptions *); 169void ip_init(void); 170extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 171 struct ip_moptions *); 172int ip_output(struct mbuf *, 173 struct mbuf *, struct route *, int, struct ip_moptions *, 174 struct inpcb *); 175struct in_ifaddr * 176 ip_rtaddr(struct in_addr, struct route *); 177void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, 178 struct mbuf *); 179void ip_slowtimo(void); 180struct mbuf * 181 ip_srcroute(void); 182void ip_stripoptions(struct mbuf *, struct mbuf *); 183#ifdef RANDOM_IP_ID 184u_int16_t 185 ip_randomid(void); 186#endif 187int rip_ctloutput(struct socket *, struct sockopt *); 188void rip_ctlinput(int, struct sockaddr *, void *); 189void rip_init(void); 190void rip_input(struct mbuf *, int); 191int rip_output(struct mbuf *, struct socket *, u_long); 192void ipip_input(struct mbuf *, int); 193void rsvp_input(struct mbuf *, int); 194int ip_rsvp_init(struct socket *); 195int ip_rsvp_done(void); 196int ip_rsvp_vif_init(struct socket *, struct sockopt *); 197int ip_rsvp_vif_done(struct socket *, struct sockopt *); 198void ip_rsvp_force_done(struct socket *); 199 200#ifdef IPDIVERT 201void div_init(void); 202void div_input(struct mbuf *, int); 203void divert_packet(struct mbuf *m, int incoming, int port, int rule); 204extern struct pr_usrreqs div_usrreqs; 205#endif 206 207void in_delayed_cksum(struct mbuf *m); 208 209#endif /* _KERNEL */ 210 211#endif /* !_NETINET_IP_VAR_H_ */ 212