ip_var.h revision 122524
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 122524 2003-11-12 03:14:31Z rwatson $ 35 */ 36 37#ifndef _NETINET_IP_VAR_H_ 38#define _NETINET_IP_VAR_H_ 39 40#include <sys/queue.h> 41 42/* 43 * Overlay for ip header used by other protocols (tcp, udp). 44 */ 45struct ipovly { 46 u_char ih_x1[9]; /* (unused) */ 47 u_char ih_pr; /* protocol */ 48 u_short ih_len; /* protocol length */ 49 struct in_addr ih_src; /* source internet address */ 50 struct in_addr ih_dst; /* destination internet address */ 51}; 52 53#ifdef _KERNEL 54/* 55 * Ip reassembly queue structure. Each fragment 56 * being reassembled is attached to one of these structures. 57 * They are timed out after ipq_ttl drops to 0, and may also 58 * be reclaimed if memory becomes tight. 59 */ 60struct ipq { 61 TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */ 62 u_char ipq_ttl; /* time for reass q to live */ 63 u_char ipq_p; /* protocol of this fragment */ 64 u_short ipq_id; /* sequence id for reassembly */ 65 struct mbuf *ipq_frags; /* to ip headers of fragments */ 66 struct in_addr ipq_src,ipq_dst; 67 u_char ipq_nfrags; /* # frags in this packet */ 68 u_int32_t ipq_div_info; /* ipfw divert port & flags */ 69 u_int16_t ipq_div_cookie; /* ipfw divert cookie */ 70 struct label *ipq_label; /* MAC label */ 71}; 72#endif /* _KERNEL */ 73 74/* 75 * Structure stored in mbuf in inpcb.ip_options 76 * and passed to ip_output when ip options are in use. 77 * The actual length of the options (including ipopt_dst) 78 * is in m_len. 79 */ 80#define MAX_IPOPTLEN 40 81 82struct ipoption { 83 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 84 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 85}; 86 87/* 88 * Structure attached to inpcb.ip_moptions and 89 * passed to ip_output when IP multicast options are in use. 90 */ 91struct ip_moptions { 92 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 93 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ 94 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 95 u_char imo_multicast_loop; /* 1 => hear sends if a member */ 96 u_short imo_num_memberships; /* no. memberships this socket */ 97 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 98 u_long imo_multicast_vif; /* vif num outgoing multicasts */ 99}; 100 101struct ipstat { 102 u_long ips_total; /* total packets received */ 103 u_long ips_badsum; /* checksum bad */ 104 u_long ips_tooshort; /* packet too short */ 105 u_long ips_toosmall; /* not enough data */ 106 u_long ips_badhlen; /* ip header length < data size */ 107 u_long ips_badlen; /* ip length < ip header length */ 108 u_long ips_fragments; /* fragments received */ 109 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 110 u_long ips_fragtimeout; /* fragments timed out */ 111 u_long ips_forward; /* packets forwarded */ 112 u_long ips_fastforward; /* packets fast forwarded */ 113 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 114 u_long ips_redirectsent; /* packets forwarded on same net */ 115 u_long ips_noproto; /* unknown or unsupported protocol */ 116 u_long ips_delivered; /* datagrams delivered to upper level*/ 117 u_long ips_localout; /* total ip packets generated here */ 118 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 119 u_long ips_reassembled; /* total packets reassembled ok */ 120 u_long ips_fragmented; /* datagrams successfully fragmented */ 121 u_long ips_ofragments; /* output fragments created */ 122 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 123 u_long ips_badoptions; /* error in option processing */ 124 u_long ips_noroute; /* packets discarded due to no route */ 125 u_long ips_badvers; /* ip version != 4 */ 126 u_long ips_rawout; /* total raw ip packets generated */ 127 u_long ips_toolong; /* ip length > max ip packet size */ 128 u_long ips_notmember; /* multicasts for unregistered grps */ 129 u_long ips_nogif; /* no match gif found */ 130 u_long ips_badaddr; /* invalid address on header */ 131}; 132 133#ifdef _KERNEL 134 135/* flags passed to ip_output as last parameter */ 136#define IP_FORWARDING 0x1 /* most of ip header exists */ 137#define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 138#define IP_SENDONES 0x4 /* send all-ones broadcast */ 139#define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 140#define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 141 142struct ip; 143struct inpcb; 144struct route; 145struct sockopt; 146 147extern struct ipstat ipstat; 148#ifndef RANDOM_IP_ID 149extern u_short ip_id; /* ip packet ctr, for ids */ 150#endif 151extern int ip_defttl; /* default IP ttl */ 152extern int ipforwarding; /* ip forwarding */ 153extern u_char ip_protox[]; 154extern struct socket *ip_rsvpd; /* reservation protocol daemon */ 155extern struct socket *ip_mrouter; /* multicast routing daemon */ 156extern int (*legal_vif_num)(int); 157extern u_long (*ip_mcast_src)(int); 158extern int rsvp_on; 159extern struct pr_usrreqs rip_usrreqs; 160 161int ip_ctloutput(struct socket *, struct sockopt *sopt); 162void ip_drain(void); 163int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, 164 u_long if_hwassist_flags, int sw_csum); 165void ip_forward_cacheinval(void); 166void ip_freemoptions(struct ip_moptions *); 167void ip_init(void); 168extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 169 struct ip_moptions *); 170int ip_output(struct mbuf *, 171 struct mbuf *, struct route *, int, struct ip_moptions *, 172 struct inpcb *); 173struct in_ifaddr * 174 ip_rtaddr(struct in_addr, struct route *); 175void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, 176 struct mbuf *); 177void ip_slowtimo(void); 178struct mbuf * 179 ip_srcroute(void); 180void ip_stripoptions(struct mbuf *, struct mbuf *); 181#ifdef RANDOM_IP_ID 182u_int16_t 183 ip_randomid(void); 184#endif 185int rip_ctloutput(struct socket *, struct sockopt *); 186void rip_ctlinput(int, struct sockaddr *, void *); 187void rip_init(void); 188void rip_input(struct mbuf *, int); 189int rip_output(struct mbuf *, struct socket *, u_long); 190void ipip_input(struct mbuf *, int); 191void rsvp_input(struct mbuf *, int); 192int ip_rsvp_init(struct socket *); 193int ip_rsvp_done(void); 194extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *); 195extern void (*ip_rsvp_force_done)(struct socket *); 196extern void (*rsvp_input_p)(struct mbuf *m, int off); 197 198 199#ifdef IPDIVERT 200void div_init(void); 201void div_input(struct mbuf *, int); 202void div_ctlinput(int, struct sockaddr *, void *); 203void divert_packet(struct mbuf *m, int incoming, int port, int rule); 204extern struct pr_usrreqs div_usrreqs; 205#endif 206 207#ifdef PFIL_HOOKS 208extern struct pfil_head inet_pfil_hook; 209#endif 210 211void in_delayed_cksum(struct mbuf *m); 212 213#endif /* _KERNEL */ 214 215#endif /* !_NETINET_IP_VAR_H_ */ 216