ip_var.h revision 1.112
1 /* $NetBSD: ip_var.h,v 1.112 2016/04/28 00:16:56 ozaki-r Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 32 */ 33 34 #ifndef _NETINET_IP_VAR_H_ 35 #define _NETINET_IP_VAR_H_ 36 37 #include <sys/queue.h> 38 #include <net/route.h> 39 40 /* 41 * Overlay for ip header used by other protocols (tcp, udp). 42 */ 43 struct ipovly { 44 u_int8_t ih_x1[9]; /* (unused) */ 45 u_int8_t ih_pr; /* protocol */ 46 u_int16_t ih_len; /* protocol length */ 47 struct in_addr ih_src; /* source internet address */ 48 struct in_addr ih_dst; /* destination internet address */ 49 } __packed; 50 51 /* 52 * IP Flow structure 53 */ 54 struct ipflow { 55 LIST_ENTRY(ipflow) ipf_list; /* next in active list */ 56 LIST_ENTRY(ipflow) ipf_hash; /* next ipflow in bucket */ 57 struct in_addr ipf_dst; /* destination address */ 58 struct in_addr ipf_src; /* source address */ 59 uint8_t ipf_tos; /* type-of-service */ 60 struct route ipf_ro; /* associated route entry */ 61 u_long ipf_uses; /* number of uses in this period */ 62 u_long ipf_last_uses; /* number of uses in last period */ 63 u_long ipf_dropped; /* ENOBUFS retured by if_output */ 64 u_long ipf_errors; /* other errors returned by if_output */ 65 u_int ipf_timer; /* lifetime timer */ 66 }; 67 68 /* 69 * IP sequence queue structure. 70 * 71 * XXX -- The following explains why the ipqe_m field is here, for TCP's use: 72 * We want to avoid doing m_pullup on incoming packets but that 73 * means avoiding dtom on the tcp reassembly code. That in turn means 74 * keeping an mbuf pointer in the reassembly queue (since we might 75 * have a cluster). As a quick hack, the source & destination 76 * port numbers (which are no longer needed once we've located the 77 * tcpcb) are overlayed with an mbuf pointer. 78 */ 79 TAILQ_HEAD(ipqehead, ipqent); 80 struct ipqent { 81 TAILQ_ENTRY(ipqent) ipqe_q; 82 union { 83 struct ip *_ip; 84 struct tcpiphdr *_tcp; 85 } _ipqe_u1; 86 struct mbuf *ipqe_m; /* point to first mbuf */ 87 struct mbuf *ipre_mlast; /* point to last mbuf */ 88 u_int8_t ipqe_mff; /* for IP fragmentation */ 89 /* 90 * The following are used in TCP reassembly 91 */ 92 TAILQ_ENTRY(ipqent) ipqe_timeq; 93 u_int32_t ipqe_seq; 94 u_int32_t ipqe_len; 95 u_int32_t ipqe_flags; 96 }; 97 #define ipqe_tcp _ipqe_u1._tcp 98 99 /* 100 * Structure stored in mbuf in inpcb.ip_options 101 * and passed to ip_output when ip options are in use. 102 * The actual length of the options (including ipopt_dst) 103 * is in m_len. 104 */ 105 #define MAX_IPOPTLEN 40 106 107 struct ipoption { 108 struct in_addr ipopt_dst; /* first-hop dst if source routed */ 109 int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */ 110 }; 111 112 /* 113 * Structure attached to inpcb.ip_moptions and 114 * passed to ip_output when IP multicast options are in use. 115 */ 116 struct ip_moptions { 117 struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ 118 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ 119 u_int8_t imo_multicast_ttl; /* TTL for outgoing multicasts */ 120 u_int8_t imo_multicast_loop; /* 1 => hear sends if a member */ 121 u_int16_t imo_num_memberships; /* no. memberships this socket */ 122 struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; 123 }; 124 125 /* 126 * IP statistics. 127 * Each counter is an unsigned 64-bit value. 128 */ 129 #define IP_STAT_TOTAL 0 /* total packets received */ 130 #define IP_STAT_BADSUM 1 /* checksum bad */ 131 #define IP_STAT_TOOSHORT 2 /* packet too short */ 132 #define IP_STAT_TOOSMALL 3 /* not enough data */ 133 #define IP_STAT_BADHLEN 4 /* ip header length < data size */ 134 #define IP_STAT_BADLEN 5 /* ip length < ip header length */ 135 #define IP_STAT_FRAGMENTS 6 /* fragments received */ 136 #define IP_STAT_FRAGDROPPED 7 /* frags dropped (dups, out of space) */ 137 #define IP_STAT_FRAGTIMEOUT 8 /* fragments timed out */ 138 #define IP_STAT_FORWARD 9 /* packets forwarded */ 139 #define IP_STAT_FASTFORWARD 10 /* packets fast forwarded */ 140 #define IP_STAT_CANTFORWARD 11 /* packets rcvd for unreachable dest */ 141 #define IP_STAT_REDIRECTSENT 12 /* packets forwareded on same net */ 142 #define IP_STAT_NOPROTO 13 /* unknown or unsupported protocol */ 143 #define IP_STAT_DELIVERED 14 /* datagrams delivered to upper level */ 144 #define IP_STAT_LOCALOUT 15 /* total ip packets generated here */ 145 #define IP_STAT_ODROPPED 16 /* lost packets due to nobufs, etc. */ 146 #define IP_STAT_REASSEMBLED 17 /* total packets reassembled ok */ 147 #define IP_STAT_FRAGMENTED 18 /* datagrams successfully fragmented */ 148 #define IP_STAT_OFRAGMENTS 19 /* output fragments created */ 149 #define IP_STAT_CANTFRAG 20 /* don't fragment flag was set, etc. */ 150 #define IP_STAT_BADOPTIONS 21 /* error in option processing */ 151 #define IP_STAT_NOROUTE 22 /* packets discarded due to no route */ 152 #define IP_STAT_BADVERS 23 /* ip version != 4 */ 153 #define IP_STAT_RAWOUT 24 /* total raw ip packets generated */ 154 #define IP_STAT_BADFRAGS 25 /* malformed fragments (bad length) */ 155 #define IP_STAT_RCVMEMDROP 26 /* frags dropped for lack of memory */ 156 #define IP_STAT_TOOLONG 27 /* ip length > max ip packet size */ 157 #define IP_STAT_NOGIF 28 /* no match gif found */ 158 #define IP_STAT_BADADDR 29 /* invalid address on header */ 159 160 #define IP_NSTATS 30 161 162 #ifdef _KERNEL 163 164 #ifdef _KERNEL_OPT 165 #include "opt_gateway.h" 166 #include "opt_mbuftrace.h" 167 #endif 168 169 /* 170 * The following flags can be passed to ip_output() as last parameter 171 */ 172 #define IP_FORWARDING 0x0001 /* most of ip header exists */ 173 #define IP_RAWOUTPUT 0x0002 /* raw ip header exists */ 174 #define IP_RETURNMTU 0x0004 /* pass back mtu on EMSGSIZE */ 175 #define IP_NOIPNEWID 0x0008 /* don't fill in ip_id */ 176 __CTASSERT(SO_DONTROUTE == 0x0010); 177 __CTASSERT(SO_BROADCAST == 0x0020); 178 #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ 179 #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ 180 181 #define IP_IGMP_MCAST 0x0040 /* IGMP for mcast join/leave */ 182 #define IP_MTUDISC 0x0400 /* Path MTU Discovery; set DF */ 183 184 extern struct domain inetdomain; 185 extern const struct pr_usrreqs rip_usrreqs; 186 187 extern int ip_defttl; /* default IP ttl */ 188 extern int ipforwarding; /* ip forwarding */ 189 extern int ip_mtudisc; /* mtu discovery */ 190 extern int ip_mtudisc_timeout; /* seconds to timeout mtu discovery */ 191 extern int anonportmin; /* minimum ephemeral port */ 192 extern int anonportmax; /* maximum ephemeral port */ 193 extern int lowportmin; /* minimum reserved port */ 194 extern int lowportmax; /* maximum reserved port */ 195 extern int ip_do_loopback_cksum; /* do IP checksum on loopback? */ 196 extern struct rttimer_queue *ip_mtudisc_timeout_q; 197 #ifdef MBUFTRACE 198 extern struct mowner ip_rx_mowner; 199 extern struct mowner ip_tx_mowner; 200 #endif 201 struct inpcb; 202 struct sockopt; 203 204 void ip_init(void); 205 void in_init(void); 206 207 int ip_ctloutput(int, struct socket *, struct sockopt *); 208 void ip_drain(void); 209 void ip_drainstub(void); 210 void ip_freemoptions(struct ip_moptions *); 211 int ip_optcopy(struct ip *, struct ip *); 212 u_int ip_optlen(struct inpcb *); 213 int ip_output(struct mbuf *, struct mbuf *, struct route *, int, 214 struct ip_moptions *, struct socket *); 215 int ip_fragment(struct mbuf *, struct ifnet *, u_long); 216 217 void ip_reass_init(void); 218 int ip_reass_packet(struct mbuf **, struct ip *); 219 void ip_reass_slowtimo(void); 220 void ip_reass_drain(void); 221 222 void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, 223 struct mbuf *); 224 void ip_slowtimo(void); 225 void ip_fasttimo(void); 226 struct mbuf * 227 ip_srcroute(void); 228 int ip_sysctl(int *, u_int, void *, size_t *, void *, size_t); 229 void ip_statinc(u_int); 230 void * rip_ctlinput(int, const struct sockaddr *, void *); 231 int rip_ctloutput(int, struct socket *, struct sockopt *); 232 void rip_init(void); 233 void rip_input(struct mbuf *, ...); 234 int rip_output(struct mbuf *, struct inpcb *); 235 int rip_usrreq(struct socket *, 236 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *); 237 238 int ip_setmoptions(struct ip_moptions **, const struct sockopt *sopt); 239 int ip_getmoptions(struct ip_moptions *, struct sockopt *sopt); 240 241 int ip_if_output(struct ifnet * const, struct mbuf * const, 242 const struct sockaddr * const, const struct rtentry *); 243 244 /* IP Flow interface. */ 245 void ipflow_init(void); 246 void ipflow_poolinit(void); 247 struct ipflow *ipflow_reap(bool); 248 void ipflow_create(const struct route *, struct mbuf *); 249 void ipflow_slowtimo(void); 250 int ipflow_invalidate_all(int); 251 252 #endif /* _KERNEL */ 253 254 #endif /* !_NETINET_IP_VAR_H_ */ 255
Indexes created Fri Sep 26 20:09:58 GMT 2025