| 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_ */ |