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 */ 36 37 #ifndef _NETINET_IP_VAR_H_ 38 #define _NETINET_IP_VAR_H_ 39 40 #ifndef _SYS_TYPES_H_ 41 #include <sys/types.h> 42 #endif 43 #ifndef _SYS_QUEUE_H_ 44 #include <sys/queue.h> 45 #endif 46 #ifndef _NETINET_IN_H_ 47 #include <netinet/in.h> 48 #endif 49 50 #ifdef _KERNEL 51 52 #include <machine/endian.h> 53 #ifndef _MACHINE_PARAM_H_ 54 #include <machine/param.h> 55 #endif 56 #ifndef _NET_ROUTE_H 57 #include <net/route.h> 58 #endif 59 60 #endif 61 62 /* 63 * Overlay for ip header used by other protocols (tcp, udp). 64 */ 65 struct ipovly { 66 u_char ih_x1[9]; /* (unused) */ 67 u_char ih_pr; /* protocol */ 68 u_short ih_len; /* protocol length */ 69 struct in_addr ih_src; /* source internet address */ 70 struct in_addr ih_dst; /* destination internet address */ 71 }; 72 73 /* 74 * Ip reassembly queue structure. Each fragment 75 * being reassembled is attached to one of these structures. 76 * They are timed out after ipq_ttl drops to 0, and may also 77 * be reclaimed if memory becomes tight. 78 */ 79 struct ipq { 80 TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */ 81 u_char ipq_ttl; /* time for reass q to live */ 82 u_char ipq_p; /* protocol of this fragment */ 83 u_short ipq_id; /* sequence id for reassembly */ 84 struct mbuf *ipq_frags; /* to ip headers of fragments */ 85 struct in_addr ipq_src,ipq_dst; 86 u_char ipq_nfrags; /* # frags in this packet */ 87 }; 88 89 /* 90 * Structure stored in mbuf in inpcb.ip_options 91 * and passed to ip_output when ip options are in use. 92 * The actual length of the options (including ipopt_dst) 93 * is in m_len. 94 */ 95 #define MAX_IPOPTLEN 40 96 97 struct ipoption { 98 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 99 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 100 }; 101 102 /* 103 * Structure attached to inpcb.ip_moptions and 104 * passed to ip_output when IP multicast options are in use. 105 */ 106 struct ip_moptions { 107 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 108 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ 109 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 110 u_char imo_multicast_loop; /* 1 => hear sends if a member */ 111 u_short imo_num_memberships; /* no. memberships this socket */ 112 u_short imo_max_memberships; /* max memberships this socket */ 113 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 114 u_long imo_multicast_vif; /* vif num outgoing multicasts */ 115 }; 116 117 /* 118 * IP Statistics. 119 * 120 * NOTE: Make sure this struct's size is multiple cache line size. 121 */ 122 struct ip_stats { 123 u_long ips_total; /* total packets received */ 124 u_long ips_badsum; /* checksum bad */ 125 u_long ips_tooshort; /* packet too short */ 126 u_long ips_toosmall; /* not enough data */ 127 u_long ips_badhlen; /* ip header length < data size */ 128 u_long ips_badlen; /* ip length < ip header length */ 129 u_long ips_fragments; /* fragments received */ 130 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 131 u_long ips_fragtimeout; /* fragments timed out */ 132 u_long ips_forward; /* packets forwarded */ 133 u_long ips_fastforward; /* packets fast forwarded */ 134 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 135 u_long ips_redirectsent; /* packets forwarded on same net */ 136 u_long ips_noproto; /* unknown or unsupported protocol */ 137 u_long ips_delivered; /* datagrams delivered to upper level*/ 138 u_long ips_localout; /* total ip packets generated here */ 139 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 140 u_long ips_reassembled; /* total packets reassembled ok */ 141 u_long ips_fragmented; /* datagrams successfully fragmented */ 142 u_long ips_ofragments; /* output fragments created */ 143 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 144 u_long ips_badoptions; /* error in option processing */ 145 u_long ips_noroute; /* packets discarded due to no route */ 146 u_long ips_badvers; /* ip version != 4 */ 147 u_long ips_rawout; /* total raw ip packets generated */ 148 u_long ips_toolong; /* ip length > max ip packet size */ 149 u_long ips_notmember; /* multicasts for unregistered grps */ 150 u_long ips_nogif; /* no match gif found */ 151 u_long ips_badaddr; /* invalid address on header */ 152 u_long ips_pad[3]; /* pad to cache line size (64B) */ 153 }; 154 155 #ifdef _KERNEL 156 157 #define ipstat ipstats_percpu[mycpuid] 158 159 extern struct ip_stats ipstats_percpu[MAXCPU]; 160 161 /* flags passed to ip_output as last parameter */ 162 #define IP_FORWARDING 0x1 /* most of ip header exists */ 163 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 164 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 165 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 166 #define IP_DEBUGROUTE 0x10000 /* debug route */ 167 168 struct ip; 169 struct inpcb; 170 struct route; 171 struct sockopt; 172 struct lwkt_port; 173 struct pktinfo; 174 union netmsg; 175 176 extern u_short ip_id; /* ip packet ctr, for ids */ 177 extern int ip_defttl; /* default IP ttl */ 178 extern int ipforwarding; /* ip forwarding */ 179 extern u_char ip_protox[]; 180 extern struct socket *ip_rsvpd; /* reservation protocol daemon */ 181 extern struct socket *ip_mrouter; /* multicast routing daemon */ 182 extern int (*legal_vif_num)(int); 183 extern u_long (*ip_mcast_src)(int); 184 extern int rsvp_on; 185 extern struct pr_usrreqs rip_usrreqs; 186 187 void ip_ctloutput(union netmsg *); 188 void ip_drain(void); 189 int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, 190 u_long if_hwassist_flags, int sw_csum); 191 struct mbuf * 192 ip_reass(struct mbuf *); 193 void ip_freemoptions(struct ip_moptions *); 194 void ip_init(void); 195 extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 196 struct ip_moptions *); 197 198 void ip_hashfn(struct mbuf **, int); 199 void ip_hashcheck(struct mbuf *, const struct pktinfo *); 200 201 boolean_t 202 ip_lengthcheck(struct mbuf **, int); 203 int ip_output(struct mbuf *, 204 struct mbuf *, struct route *, int, struct ip_moptions *, 205 struct inpcb *); 206 struct in_ifaddr * 207 ip_rtaddr(struct in_addr, struct route *); 208 void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, 209 struct mbuf *); 210 void ip_slowtimo(void); 211 struct mbuf * 212 ip_srcroute(struct mbuf *); 213 void ip_stripoptions(struct mbuf *); 214 u_int16_t ip_randomid(void); 215 void rip_ctloutput(union netmsg *); 216 void rip_ctlinput(union netmsg *); 217 void rip_init(void); 218 int rip_input(struct mbuf **, int *, int); 219 int rip_output(struct mbuf *, struct socket *, ...); 220 extern int (*ipip_input)(struct mbuf **, int *, int); 221 int rsvp_input(struct mbuf **, int *, int); 222 int ip_rsvp_init(struct socket *); 223 int ip_rsvp_done(void); 224 extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *); 225 extern void (*ip_rsvp_force_done)(struct socket *); 226 extern int (*rsvp_input_p)(struct mbuf **, int *, int); 227 228 extern struct pfil_head inet_pfil_hook; 229 230 void in_delayed_cksum(struct mbuf *m); 231 232 static __inline uint16_t ip_newid(void); 233 extern int ip_do_randomid; 234 235 static __inline uint16_t 236 ip_newid(void) 237 { 238 if (ip_do_randomid) 239 return ip_randomid(); 240 else 241 return __htons(ip_id++); 242 } 243 244 #endif /* _KERNEL */ 245 246 #endif /* !_NETINET_IP_VAR_H_ */ 247