ip.h revision c005246ed03de874fdc432073ba8e5e8ebfed922
18cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd/* 28cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * Copyright (c) 1982, 1986, 1993 38cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * The Regents of the University of California. All rights reserved. 48cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * 58cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * Redistribution and use in source and binary forms, with or without 68cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * modification, are permitted provided that the following conditions 78cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * are met: 88cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * 1. Redistributions of source code must retain the above copyright 98cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * notice, this list of conditions and the following disclaimer. 108cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * 2. Redistributions in binary form must reproduce the above copyright 118cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * notice, this list of conditions and the following disclaimer in the 128cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * documentation and/or other materials provided with the distribution. 138cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * 3. Neither the name of the University nor the names of its contributors 148cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * may be used to endorse or promote products derived from this software 158cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * without specific prior written permission. 168cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * 178cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 188cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 198cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 208cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 218cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 228cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 238cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 248cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 258cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 268cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 278cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * SUCH DAMAGE. 288cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * 298cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * @(#)ip.h 8.1 (Berkeley) 6/10/93 308cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * ip.h,v 1.3 1994/08/21 05:27:30 paul Exp 318cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd */ 328cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 338cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#ifndef _IP_H_ 348cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define _IP_H_ 358cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 368cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#include "helper.h" 378cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 388cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#ifdef HOST_WORDS_BIGENDIAN 398cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# ifndef NTOHL 408cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# define NTOHL(d) 418cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# endif 428cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# ifndef NTOHS 438cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# define NTOHS(d) 448cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# endif 458cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# ifndef HTONL 468cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# define HTONL(d) 478cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# endif 488cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# ifndef HTONS 498cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# define HTONS(d) 508cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# endif 518cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#else 528cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# ifndef NTOHL 538cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# define NTOHL(d) ((d) = ntohl((d))) 548cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# endif 558cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# ifndef NTOHS 568cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# define NTOHS(d) ((d) = ntohs((u_int16_t)(d))) 578cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# endif 588cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# ifndef HTONL 598cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# define HTONL(d) ((d) = htonl((d))) 608cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# endif 618cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# ifndef HTONS 628cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# define HTONS(d) ((d) = htons((u_int16_t)(d))) 638cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd# endif 648cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#endif 658cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 668cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Doddtypedef u_int32_t n_long; /* long as received from the net */ 678cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 688cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd/* 698cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * Definitions for internet protocol version 4. 708cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * Per RFC 791, September 1981. 718cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd */ 728cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPVERSION 4 738cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 748cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd/* 758cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * Structure of an internet header, naked of options. 768cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd */ 778cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Doddstruct ip { 788cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#ifdef HOST_WORDS_BIGENDIAN 798cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int ip_v:4; /* version */ 808cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int ip_hl:4; /* header length */ 818cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#else 828cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int ip_hl:4; /* header length */ 838cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int ip_v:4; /* version */ 848cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#endif 858cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int8_t ip_tos; /* type of service */ 868cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int16_t ip_len; /* total length */ 878cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int16_t ip_id; /* identification */ 888cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int16_t ip_off; /* fragment offset field */ 898cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IP_DF 0x4000 /* don't fragment flag */ 908cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IP_MF 0x2000 /* more fragments flag */ 918cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ 928cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int8_t ip_ttl; /* time to live */ 938cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int8_t ip_p; /* protocol */ 948cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int16_t ip_sum; /* checksum */ 958cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd ipaddr_t ip_src, ip_dst; /* source and dest address */ 968cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd}; 978cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 988cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IP_MAXPACKET 65535 /* maximum packet size */ 998cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 1008cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd/* 1018cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * Definitions for IP type of service (ip_tos) 1028cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd */ 1038cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPTOS_LOWDELAY 0x10 1048cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPTOS_THROUGHPUT 0x08 1058cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPTOS_RELIABILITY 0x04 1068cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 1078cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd/* 1088cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * Definitions for options. 1098cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd */ 1108cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_COPIED(o) ((o)&0x80) 1118cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_CLASS(o) ((o)&0x60) 1128cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_NUMBER(o) ((o)&0x1f) 1138cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 1148cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_CONTROL 0x00 1158cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_RESERVED1 0x20 1168cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_DEBMEAS 0x40 1178cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_RESERVED2 0x60 1188cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 1198cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_EOL 0 /* end of option list */ 1208cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_NOP 1 /* no operation */ 1218cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 1228cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_RR 7 /* record packet route */ 1238cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_TS 68 /* timestamp */ 1248cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ 1258cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_LSRR 131 /* loose source route */ 1268cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_SATID 136 /* satnet id */ 1278cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_SSRR 137 /* strict source route */ 1288cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 1298cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd/* 1308cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * Offsets to fields in options other than EOL and NOP. 1318cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd */ 1328cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_OPTVAL 0 /* option ID */ 1338cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_OLEN 1 /* option length */ 1348cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_OFFSET 2 /* offset within option */ 1358cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_MINOFF 4 /* min value of above */ 1368cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 1378cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd/* 1388cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd * Time stamp option structure. 1398cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd */ 1408cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Doddstruct ip_timestamp { 1418cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int8_t ipt_code; /* IPOPT_TS */ 1428cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int8_t ipt_len; /* size of structure (variable) */ 1438cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int8_t ipt_ptr; /* index of current entry */ 1448cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#ifdef HOST_WORDS_BIGENDIAN 1458cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int ipt_oflw:4, /* overflow counter */ 1468cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd ipt_flg:4; /* flags, see below */ 1478cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#else 1488cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd u_int ipt_flg:4, /* flags, see below */ 1498cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd ipt_oflw:4; /* overflow counter */ 1508cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#endif 1518cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd union ipt_timestamp { 1528cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd n_long ipt_time[1]; 1538cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd struct ipt_ta { 1548cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd ipaddr_t ipt_addr; 1558cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd n_long ipt_time; 1568cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd } ipt_ta[1]; 1578cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd } ipt_timestamp; 1588cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd}; 1598cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 1608cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd/* flag bits for ipt_flg */ 1618cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_TS_TSONLY 0 /* timestamps only */ 1628cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ 1638cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd#define IPOPT_TS_PRESPEC 3 /* specified modules only */ 1648cfa702f803c5ef6a2b062a489a1b2cf66b45b5eMike Dodd 165/* bits for security (not byte swapped) */ 166#define IPOPT_SECUR_UNCLASS 0x0000 167#define IPOPT_SECUR_CONFID 0xf135 168#define IPOPT_SECUR_EFTO 0x789a 169#define IPOPT_SECUR_MMMM 0xbc4d 170#define IPOPT_SECUR_RESTR 0xaf13 171#define IPOPT_SECUR_SECRET 0xd788 172#define IPOPT_SECUR_TOPSECRET 0x6bc5 173 174/* 175 * Internet implementation parameters. 176 */ 177#define MAXTTL 255 /* maximum time to live (seconds) */ 178#define IPDEFTTL 64 /* default ttl, from RFC 1340 */ 179#define IPFRAGTTL 60 /* time to live for frags, slowhz */ 180#define IPTTLDEC 1 /* subtracted when forwarding */ 181 182#define IP_MSS 576 /* default maximum segment size */ 183 184#if SIZEOF_CHAR_P == 4 185struct mbuf_ptr { 186 struct mbuf *mptr; 187 uint32_t dummy; 188}; 189#else 190struct mbuf_ptr { 191 struct mbuf *mptr; 192}; 193#endif 194struct qlink { 195 void *next, *prev; 196}; 197 198/* 199 * Overlay for ip header used by other protocols (tcp, udp). 200 */ 201struct ipovly { 202 struct mbuf_ptr ih_mbuf; /* backpointer to mbuf */ 203 u_int8_t ih_x1; /* (unused) */ 204 u_int8_t ih_pr; /* protocol */ 205 u_int16_t ih_len; /* protocol length */ 206 ipaddr_t ih_src; /* source internet address */ 207 ipaddr_t ih_dst; /* destination internet address */ 208} __attribute__((packed)); 209 210/* 211 * Ip reassembly queue structure. Each fragment 212 * being reassembled is attached to one of these structures. 213 * They are timed out after ipq_ttl drops to 0, and may also 214 * be reclaimed if memory becomes tight. 215 * size 28 bytes 216 */ 217struct ipq { 218 struct qlink frag_link; /* to ip headers of fragments */ 219 struct qlink ip_link; /* to other reass headers */ 220 u_int8_t ipq_ttl; /* time for reass q to live */ 221 u_int8_t ipq_p; /* protocol of this fragment */ 222 u_int16_t ipq_id; /* sequence id for reassembly */ 223 ipaddr_t ipq_src,ipq_dst; 224}; 225 226/* 227 * Ip header, when holding a fragment. 228 * 229 * Note: ipf_link must be at same offset as frag_link above 230 */ 231struct ipasfrag { 232 struct qlink ipf_link; 233 struct ip ipf_ip; 234}; 235 236#define ipf_off ipf_ip.ip_off 237#define ipf_tos ipf_ip.ip_tos 238#define ipf_len ipf_ip.ip_len 239#define ipf_next ipf_link.next 240#define ipf_prev ipf_link.prev 241 242/* 243 * Structure stored in mbuf in inpcb.ip_options 244 * and passed to ip_output when ip options are in use. 245 * The actual length of the options (including ipopt_dst) 246 * is in m_len. 247 */ 248#define MAX_IPOPTLEN 40 249 250struct ipoption { 251 u_int32_t ipopt_dst; /* first-hop dst if source routed */ 252 int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */ 253}; 254 255#ifdef LOG_ENABLED 256/* 257 * Structure attached to inpcb.ip_moptions and 258 * passed to ip_output when IP multicast options are in use. 259 */ 260 261struct ipstat { 262 u_long ips_total; /* total packets received */ 263 u_long ips_badsum; /* checksum bad */ 264 u_long ips_tooshort; /* packet too short */ 265 u_long ips_toosmall; /* not enough data */ 266 u_long ips_badhlen; /* ip header length < data size */ 267 u_long ips_badlen; /* ip length < ip header length */ 268 u_long ips_fragments; /* fragments received */ 269 u_long ips_fragdropped; /* frags dropped (dups, out of space) */ 270 u_long ips_fragtimeout; /* fragments timed out */ 271 u_long ips_forward; /* packets forwarded */ 272 u_long ips_cantforward; /* packets rcvd for unreachable dest */ 273 u_long ips_redirectsent; /* packets forwarded on same net */ 274 u_long ips_noproto; /* unknown or unsupported protocol */ 275 u_long ips_delivered; /* datagrams delivered to upper level*/ 276 u_long ips_localout; /* total ip packets generated here */ 277 u_long ips_odropped; /* lost packets due to nobufs, etc. */ 278 u_long ips_reassembled; /* total packets reassembled ok */ 279 u_long ips_fragmented; /* datagrams successfully fragmented */ 280 u_long ips_ofragments; /* output fragments created */ 281 u_long ips_cantfrag; /* don't fragment flag was set, etc. */ 282 u_long ips_badoptions; /* error in option processing */ 283 u_long ips_noroute; /* packets discarded due to no route */ 284 u_long ips_badvers; /* ip version != 4 */ 285 u_long ips_rawout; /* total raw ip packets generated */ 286 u_long ips_unaligned; /* times the ip packet was not aligned */ 287}; 288 289extern struct ipstat ipstat; 290#endif 291 292extern struct ipq ipq; /* ip reass. queue */ 293extern u_int16_t ip_id; /* ip packet ctr, for ids */ 294 295#endif 296