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: src/sys/netinet/ip_var.h,v 1.50.2.13 2003/08/24 08:24:38 hsu Exp $ 35 * $DragonFly: src/sys/netinet/ip_var.h,v 1.16 2005/04/18 14:26:57 joerg Exp $ 36 */ 37 38 #ifndef _NETINET_IP_VAR_H_ 39 #define _NETINET_IP_VAR_H_ 40 41 #include <sys/queue.h> 42 43 /* 44 * Overlay for ip header used by other protocols (tcp, udp). 45 */ 46 struct ipovly { 47 u_char ih_x1[9]; /* (unused) */ 48 u_char ih_pr; /* protocol */ 49 u_short ih_len; /* protocol length */ 50 struct in_addr ih_src; /* source internet address */ 51 struct in_addr ih_dst; /* destination internet address */ 52 }; 53 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 */ 60 struct ipq { 61 struct ipq *next,*prev; /* 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 #ifdef IPDIVERT 69 u_int32_t ipq_div_info; /* ipfw divert port & flags */ 70 #endif 71 }; 72 73 /* 74 * Structure stored in mbuf in inpcb.ip_options 75 * and passed to ip_output when ip options are in use. 76 * The actual length of the options (including ipopt_dst) 77 * is in m_len. 78 */ 79 #define MAX_IPOPTLEN 40 80 81 struct ipoption { 82 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 83 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 84 }; 85 86 /* 87 * Structure attached to inpcb.ip_moptions and 88 * passed to ip_output when IP multicast options are in use. 89 */ 90 struct ip_moptions { 91 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 92 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ 93 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 94 u_char imo_multicast_loop; /* 1 => hear sends if a member */ 95 u_short imo_num_memberships; /* no. memberships this socket */ 96 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 97 u_long imo_multicast_vif; /* vif num outgoing multicasts */ 98 }; 99 100 #ifdef _KERNEL 101 102 #if defined(SMP) 103 #define ipstat ipstats_percpu[mycpuid] 104 #else /* !SMP */ 105 #define ipstat ipstats_percpu[0] 106 #endif 107 108 struct ip_stats; 109 extern struct ip_stats ipstats_percpu[MAXCPU]; 110 #endif 111 112 /* 113 * IP Statistics. 114 */ 115 struct ip_stats { 116 u_long ips_total; /* total packets received */ 117 u_long ips_badsum; /* checksum bad */ 118 u_long ips_tooshort; /* packet too short */ 119 u_long ips_toosmall; /* not enough data */ 120 u_long ips_badhlen; /* ip header length < data size */ 121 u_long ips_badlen; /* ip length < ip header length */ 122 u_long ips_fragments; /* fragments received */ 123 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 124 u_long ips_fragtimeout; /* fragments timed out */ 125 u_long ips_forward; /* packets forwarded */ 126 u_long ips_fastforward; /* packets fast forwarded */ 127 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 128 u_long ips_redirectsent; /* packets forwarded on same net */ 129 u_long ips_noproto; /* unknown or unsupported protocol */ 130 u_long ips_delivered; /* datagrams delivered to upper level*/ 131 u_long ips_localout; /* total ip packets generated here */ 132 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 133 u_long ips_reassembled; /* total packets reassembled ok */ 134 u_long ips_fragmented; /* datagrams successfully fragmented */ 135 u_long ips_ofragments; /* output fragments created */ 136 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 137 u_long ips_badoptions; /* error in option processing */ 138 u_long ips_noroute; /* packets discarded due to no route */ 139 u_long ips_badvers; /* ip version != 4 */ 140 u_long ips_rawout; /* total raw ip packets generated */ 141 u_long ips_toolong; /* ip length > max ip packet size */ 142 u_long ips_notmember; /* multicasts for unregistered grps */ 143 u_long ips_nogif; /* no match gif found */ 144 u_long ips_badaddr; /* invalid address on header */ 145 }; 146 147 #ifdef _KERNEL 148 149 /* flags passed to ip_output as last parameter */ 150 #define IP_FORWARDING 0x1 /* most of ip header exists */ 151 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 152 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 153 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 154 155 struct ip; 156 struct inpcb; 157 struct route; 158 struct sockopt; 159 struct lwkt_port; 160 161 #ifndef RANDOM_IP_ID 162 extern u_short ip_id; /* ip packet ctr, for ids */ 163 #endif 164 extern int ip_defttl; /* default IP ttl */ 165 extern int ipforwarding; /* ip forwarding */ 166 extern struct route ipforward_rt; /* ip forwarding cached route */ 167 extern u_char ip_protox[]; 168 extern struct socket *ip_rsvpd; /* reservation protocol daemon */ 169 extern struct socket *ip_mrouter; /* multicast routing daemon */ 170 extern int (*legal_vif_num)(int); 171 extern u_long (*ip_mcast_src)(int); 172 extern int rsvp_on; 173 extern struct pr_usrreqs rip_usrreqs; 174 175 int ip_ctloutput(struct socket *, struct sockopt *sopt); 176 void ip_drain(void); 177 int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, 178 u_long if_hwassist_flags, int sw_csum); 179 void ip_freemoptions(struct ip_moptions *); 180 void ip_init(void); 181 extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 182 struct ip_moptions *); 183 struct lwkt_port * 184 ip_mport(struct mbuf **); 185 boolean_t 186 ip_lengthcheck(struct mbuf **); 187 int ip_output(struct mbuf *, 188 struct mbuf *, struct route *, int, struct ip_moptions *, 189 struct inpcb *); 190 struct in_ifaddr * 191 ip_rtaddr(struct in_addr, struct route *); 192 void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, 193 struct mbuf *); 194 void ip_slowtimo(void); 195 struct mbuf * 196 ip_srcroute(void); 197 void ip_stripoptions(struct mbuf *); 198 #ifdef RANDOM_IP_ID 199 u_int16_t 200 ip_randomid(void); 201 #endif 202 int rip_ctloutput(struct socket *, struct sockopt *); 203 void rip_ctlinput(int, struct sockaddr *, void *); 204 void rip_init(void); 205 void rip_input(struct mbuf *, ...); 206 int rip_output(struct mbuf *, struct socket *, ...); 207 extern void (*ipip_input)(struct mbuf *, int, int); 208 void rsvp_input(struct mbuf *, ...); 209 int ip_rsvp_init(struct socket *); 210 int ip_rsvp_done(void); 211 extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *); 212 extern void (*ip_rsvp_force_done)(struct socket *); 213 extern void (*rsvp_input_p)(struct mbuf *m, ...); 214 215 #ifdef IPDIVERT 216 void div_init(void); 217 void div_input(struct mbuf *, ...); 218 void divert_packet(struct mbuf *m, int incoming, int port); 219 extern struct pr_usrreqs div_usrreqs; 220 #endif 221 222 extern struct pfil_head inet_pfil_hook; 223 224 void in_delayed_cksum(struct mbuf *m); 225 226 #endif /* _KERNEL */ 227 228 #endif /* !_NETINET_IP_VAR_H_ */ 229