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 struct ip_stats { 121 u_long ips_total; /* total packets received */ 122 u_long ips_badsum; /* checksum bad */ 123 u_long ips_tooshort; /* packet too short */ 124 u_long ips_toosmall; /* not enough data */ 125 u_long ips_badhlen; /* ip header length < data size */ 126 u_long ips_badlen; /* ip length < ip header length */ 127 u_long ips_fragments; /* fragments received */ 128 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 129 u_long ips_fragtimeout; /* fragments timed out */ 130 u_long ips_forward; /* packets forwarded */ 131 u_long ips_fastforward; /* packets fast forwarded */ 132 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 133 u_long ips_redirectsent; /* packets forwarded on same net */ 134 u_long ips_noproto; /* unknown or unsupported protocol */ 135 u_long ips_delivered; /* datagrams delivered to upper level*/ 136 u_long ips_localout; /* total ip packets generated here */ 137 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 138 u_long ips_reassembled; /* total packets reassembled ok */ 139 u_long ips_fragmented; /* datagrams successfully fragmented */ 140 u_long ips_ofragments; /* output fragments created */ 141 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 142 u_long ips_badoptions; /* error in option processing */ 143 u_long ips_noroute; /* packets discarded due to no route */ 144 u_long ips_badvers; /* ip version != 4 */ 145 u_long ips_rawout; /* total raw ip packets generated */ 146 u_long ips_toolong; /* ip length > max ip packet size */ 147 u_long ips_notmember; /* multicasts for unregistered grps */ 148 u_long ips_nogif; /* no match gif found */ 149 u_long ips_badaddr; /* invalid address on header */ 150 }; 151 152 #ifdef _KERNEL 153 154 #if defined(SMP) 155 #define ipstat ipstats_percpu[mycpuid] 156 #else /* !SMP */ 157 #define ipstat ipstats_percpu[0] 158 #endif 159 160 extern struct ip_stats ipstats_percpu[MAXCPU]; 161 162 /* flags passed to ip_output as last parameter */ 163 #define IP_FORWARDING 0x1 /* most of ip header exists */ 164 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 165 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 166 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 167 #define IP_DEBUGROUTE 0x10000 /* debug route */ 168 169 /* direction passed to ip_cpufn as last parameter */ 170 #define IP_MPORT_IN 0 /* Find lwkt port for incoming packets */ 171 #define IP_MPORT_OUT 1 /* Find lwkt port for outgoing packets */ 172 173 struct ip; 174 struct inpcb; 175 struct route; 176 struct sockopt; 177 struct lwkt_port; 178 struct pktinfo; 179 union netmsg; 180 181 extern u_short ip_id; /* ip packet ctr, for ids */ 182 extern int ip_defttl; /* default IP ttl */ 183 extern int ipforwarding; /* ip forwarding */ 184 extern u_char ip_protox[]; 185 extern struct socket *ip_rsvpd; /* reservation protocol daemon */ 186 extern struct socket *ip_mrouter; /* multicast routing daemon */ 187 extern int (*legal_vif_num)(int); 188 extern u_long (*ip_mcast_src)(int); 189 extern int rsvp_on; 190 extern struct pr_usrreqs rip_usrreqs; 191 192 void ip_ctloutput(union netmsg *); 193 void ip_drain(void); 194 int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, 195 u_long if_hwassist_flags, int sw_csum); 196 struct mbuf * 197 ip_reass(struct mbuf *); 198 void ip_freemoptions(struct ip_moptions *); 199 void ip_init(void); 200 extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 201 struct ip_moptions *); 202 203 void ip_cpufn(struct mbuf **, int, int); 204 void ip_cpufn_in(struct mbuf **, int); 205 void ip_hashcheck(struct mbuf *, const struct pktinfo *); 206 207 boolean_t 208 ip_lengthcheck(struct mbuf **, int); 209 int ip_output(struct mbuf *, 210 struct mbuf *, struct route *, int, struct ip_moptions *, 211 struct inpcb *); 212 struct in_ifaddr * 213 ip_rtaddr(struct in_addr, struct route *); 214 void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, 215 struct mbuf *); 216 void ip_slowtimo(void); 217 struct mbuf * 218 ip_srcroute(struct mbuf *); 219 void ip_stripoptions(struct mbuf *); 220 u_int16_t ip_randomid(void); 221 void rip_ctloutput(union netmsg *); 222 void rip_ctlinput(union netmsg *); 223 void rip_init(void); 224 int rip_input(struct mbuf **, int *, int); 225 int rip_output(struct mbuf *, struct socket *, ...); 226 extern int (*ipip_input)(struct mbuf **, int *, int); 227 int rsvp_input(struct mbuf **, int *, int); 228 int ip_rsvp_init(struct socket *); 229 int ip_rsvp_done(void); 230 extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *); 231 extern void (*ip_rsvp_force_done)(struct socket *); 232 extern int (*rsvp_input_p)(struct mbuf **, int *, int); 233 234 extern struct pfil_head inet_pfil_hook; 235 236 void in_delayed_cksum(struct mbuf *m); 237 238 static __inline uint16_t ip_newid(void); 239 extern int ip_do_randomid; 240 241 static __inline uint16_t 242 ip_newid(void) 243 { 244 if (ip_do_randomid) 245 return ip_randomid(); 246 else 247 return __htons(ip_id++); 248 } 249 250 #endif /* _KERNEL */ 251 252 #endif /* !_NETINET_IP_VAR_H_ */ 253