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 1.20 2006/09/30 21:23:28 swildner Exp $ 36 */ 37 38 #ifndef _NETINET_IP_VAR_H_ 39 #define _NETINET_IP_VAR_H_ 40 41 #ifndef _SYS_TYPES_H_ 42 #include <sys/types.h> 43 #endif 44 #ifndef _SYS_QUEUE_H_ 45 #include <sys/queue.h> 46 #endif 47 #ifndef _NETINET_IN_H_ 48 #include <netinet/in.h> 49 #endif 50 51 #ifdef _KERNEL 52 53 #ifndef _MACHINE_ENDIAN_H_ 54 #include <machine/endian.h> 55 #endif 56 #ifndef _MACHINE_PARAM_H_ 57 #include <machine/param.h> 58 #endif 59 #ifndef _NET_ROUTE_H 60 #include <net/route.h> 61 #endif 62 63 #endif 64 65 /* 66 * Overlay for ip header used by other protocols (tcp, udp). 67 */ 68 struct ipovly { 69 u_char ih_x1[9]; /* (unused) */ 70 u_char ih_pr; /* protocol */ 71 u_short ih_len; /* protocol length */ 72 struct in_addr ih_src; /* source internet address */ 73 struct in_addr ih_dst; /* destination internet address */ 74 }; 75 76 /* 77 * Ip reassembly queue structure. Each fragment 78 * being reassembled is attached to one of these structures. 79 * They are timed out after ipq_ttl drops to 0, and may also 80 * be reclaimed if memory becomes tight. 81 */ 82 struct ipq { 83 struct ipq *next,*prev; /* to other reass headers */ 84 u_char ipq_ttl; /* time for reass q to live */ 85 u_char ipq_p; /* protocol of this fragment */ 86 u_short ipq_id; /* sequence id for reassembly */ 87 struct mbuf *ipq_frags; /* to ip headers of fragments */ 88 struct in_addr ipq_src,ipq_dst; 89 u_char ipq_nfrags; /* # frags in this packet */ 90 #ifdef IPDIVERT 91 u_int32_t ipq_div_info; /* ipfw divert port & flags */ 92 #endif 93 }; 94 95 /* 96 * Structure stored in mbuf in inpcb.ip_options 97 * and passed to ip_output when ip options are in use. 98 * The actual length of the options (including ipopt_dst) 99 * is in m_len. 100 */ 101 #define MAX_IPOPTLEN 40 102 103 struct ipoption { 104 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 105 char ipopt_list[MAX_IPOPTLEN]; /* options proper */ 106 }; 107 108 /* 109 * Structure attached to inpcb.ip_moptions and 110 * passed to ip_output when IP multicast options are in use. 111 */ 112 struct ip_moptions { 113 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 114 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ 115 u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ 116 u_char imo_multicast_loop; /* 1 => hear sends if a member */ 117 u_short imo_num_memberships; /* no. memberships this socket */ 118 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 119 u_long imo_multicast_vif; /* vif num outgoing multicasts */ 120 }; 121 122 /* 123 * IP Statistics. 124 */ 125 struct ip_stats { 126 u_long ips_total; /* total packets received */ 127 u_long ips_badsum; /* checksum bad */ 128 u_long ips_tooshort; /* packet too short */ 129 u_long ips_toosmall; /* not enough data */ 130 u_long ips_badhlen; /* ip header length < data size */ 131 u_long ips_badlen; /* ip length < ip header length */ 132 u_long ips_fragments; /* fragments received */ 133 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 134 u_long ips_fragtimeout; /* fragments timed out */ 135 u_long ips_forward; /* packets forwarded */ 136 u_long ips_fastforward; /* packets fast forwarded */ 137 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 138 u_long ips_redirectsent; /* packets forwarded on same net */ 139 u_long ips_noproto; /* unknown or unsupported protocol */ 140 u_long ips_delivered; /* datagrams delivered to upper level*/ 141 u_long ips_localout; /* total ip packets generated here */ 142 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 143 u_long ips_reassembled; /* total packets reassembled ok */ 144 u_long ips_fragmented; /* datagrams successfully fragmented */ 145 u_long ips_ofragments; /* output fragments created */ 146 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 147 u_long ips_badoptions; /* error in option processing */ 148 u_long ips_noroute; /* packets discarded due to no route */ 149 u_long ips_badvers; /* ip version != 4 */ 150 u_long ips_rawout; /* total raw ip packets generated */ 151 u_long ips_toolong; /* ip length > max ip packet size */ 152 u_long ips_notmember; /* multicasts for unregistered grps */ 153 u_long ips_nogif; /* no match gif found */ 154 u_long ips_badaddr; /* invalid address on header */ 155 }; 156 157 #ifdef _KERNEL 158 159 #if defined(SMP) 160 #define ipstat ipstats_percpu[mycpuid] 161 #else /* !SMP */ 162 #define ipstat ipstats_percpu[0] 163 #endif 164 165 extern struct ip_stats ipstats_percpu[MAXCPU]; 166 167 /* flags passed to ip_output as last parameter */ 168 #define IP_FORWARDING 0x1 /* most of ip header exists */ 169 #define IP_RAWOUTPUT 0x2 /* raw ip header exists */ 170 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 171 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 172 173 struct ip; 174 struct inpcb; 175 struct route; 176 struct sockopt; 177 struct lwkt_port; 178 179 extern u_short ip_id; /* ip packet ctr, for ids */ 180 extern int ip_defttl; /* default IP ttl */ 181 extern int ipforwarding; /* ip forwarding */ 182 extern struct route ipforward_rt[]; /* ip forwarding cached route */ 183 extern u_char ip_protox[]; 184 extern struct socket *ip_rsvpd; /* reservation protocol daemon */ 185 extern struct socket *ip_mrouter; /* multicast routing daemon */ 186 extern int (*legal_vif_num)(int); 187 extern u_long (*ip_mcast_src)(int); 188 extern int rsvp_on; 189 extern struct pr_usrreqs rip_usrreqs; 190 191 int ip_ctloutput(struct socket *, struct sockopt *sopt); 192 void ip_drain(void); 193 int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, 194 u_long if_hwassist_flags, int sw_csum); 195 void ip_freemoptions(struct ip_moptions *); 196 void ip_init(void); 197 extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, 198 struct ip_moptions *); 199 struct lwkt_port * 200 ip_mport(struct mbuf **); 201 boolean_t 202 ip_lengthcheck(struct mbuf **); 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(void); 213 void ip_stripoptions(struct mbuf *); 214 u_int16_t ip_randomid(void); 215 int rip_ctloutput(struct socket *, struct sockopt *); 216 void rip_ctlinput(int, struct sockaddr *, void *); 217 void rip_init(void); 218 void rip_input(struct mbuf *, ...); 219 int rip_output(struct mbuf *, struct socket *, ...); 220 extern void (*ipip_input)(struct mbuf *, int, int); 221 void rsvp_input(struct mbuf *, ...); 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 void (*rsvp_input_p)(struct mbuf *m, ...); 227 228 #ifdef IPDIVERT 229 void div_init(void); 230 void div_input(struct mbuf *, ...); 231 void divert_packet(struct mbuf *m, int incoming, int port); 232 extern struct pr_usrreqs div_usrreqs; 233 #endif 234 235 extern struct pfil_head inet_pfil_hook; 236 237 void in_delayed_cksum(struct mbuf *m); 238 239 static __inline uint16_t ip_newid(void); 240 extern int ip_do_randomid; 241 242 static __inline uint16_t 243 ip_newid(void) 244 { 245 if (ip_do_randomid) 246 return ip_randomid(); 247 else 248 return __htons(ip_id++); 249 } 250 251 #endif /* _KERNEL */ 252 253 #endif /* !_NETINET_IP_VAR_H_ */ 254