2 * Copyright (C) 2012 by Darren Reed.
4 * See the IPFILTER.LICENCE file for details on licencing.
6 * @(#)ip_compat.h 1.8 1/14/96
8 * Id: ip_compat.h,v 2.142.2.57 2007/10/10 09:51:42 darrenr Exp $
11 #ifndef __IP_COMPAT_H__
12 #define __IP_COMPAT_H__
26 #if defined(_KERNEL) || defined(KERNEL) || defined(__KERNEL__)
36 # if defined(sun) && (defined(__svr4__) || defined(__SVR4))
44 #if defined(__SVR4) || defined(__svr4__) || defined(__sgi)
46 # if !defined(_KERNEL)
47 # define bzero(a,b) memset(a,0,b)
49 # define bcopy(a,b,c) memmove(b,a,c)
55 # define LIFNAMSIZ IF_NAMESIZE
58 # define LIFNAMSIZ IFNAMSIZ
65 #if defined(__sgi) || defined(bsdi) || defined(__hpux) || defined(hpux)
67 u_char ether_addr_octet[6];
72 # define IPL_EXTERN(ep) ipl##ep
74 # define IPL_EXTERN(ep) ipl/**/ep
78 * This is a workaround for <sys/uio.h> troubles on FreeBSD and OpenBSD.
91 #define NETBSD_GE_REV(x) (defined(__NetBSD_Version__) && \
92 (__NetBSD_Version__ >= (x)))
93 #define NETBSD_GT_REV(x) (defined(__NetBSD_Version__) && \
94 (__NetBSD_Version__ > (x)))
95 #define NETBSD_LT_REV(x) (defined(__NetBSD_Version__) && \
96 (__NetBSD_Version__ < (x)))
97 #define FREEBSD_GE_REV(x) (defined(__FreeBSD_version) && \
98 (__FreeBSD_version >= (x)))
99 #define FREEBSD_GT_REV(x) (defined(__FreeBSD_version) && \
100 (__FreeBSD_version > (x)))
101 #define FREEBSD_LT_REV(x) (defined(__FreeBSD_version) && \
102 (__FreeBSD_version < (x)))
103 #define BSDOS_GE_REV(x) (defined(_BSDI_VERSION) && \
104 (_BSDI_VERSION >= (x)))
105 #define BSDOS_GT_REV(x) (defined(_BSDI_VERSION) && \
106 (_BSDI_VERSION > (x)))
107 #define BSDOS_LT_REV(x) (defined(_BSDI_VERSION) && \
108 (_BSDI_VERSION < (x)))
109 #define OPENBSD_GE_REV(x) (defined(OpenBSD) && (OpenBSD >= (x)))
110 #define OPENBSD_GT_REV(x) (defined(OpenBSD) && (OpenBSD > (x)))
111 #define OPENBSD_LT_REV(x) (defined(OpenBSD) && (OpenBSD < (x)))
112 #define BSD_GE_YEAR(x) (defined(BSD) && (BSD >= (x)))
113 #define BSD_GT_YEAR(x) (defined(BSD) && (BSD > (x)))
114 #define BSD_LT_YEAR(x) (defined(BSD) && (BSD < (x)))
117 /* ----------------------------------------------------------------------- */
119 /* ----------------------------------------------------------------------- */
120 # define HAS_SYS_MD5_H 1
121 # if defined(_KERNEL)
122 # include "opt_bpf.h"
123 # include "opt_inet6.h"
124 # if defined(INET6) && !defined(USE_INET6)
128 # if !defined(USE_INET6) && !defined(NOINET6)
133 # if defined(_KERNEL)
134 # include <netinet/ip_var.h>
135 # define p_cred td_ucred
136 # define p_uid td_ucred->cr_ruid
139 * When #define'd, the 5.2.1 kernel panics when used with the ftp proxy.
140 * There may be other, safe, kernels but this is not extensively tested yet.
142 # define HAVE_M_PULLDOWN
143 # if !defined(IPFILTER_LKM) && (__FreeBSD_version >= 300000)
144 # include "opt_ipfilter.h"
146 # define COPYIN(a,b,c) copyin((caddr_t)(a), (caddr_t)(b), (c))
147 # define COPYOUT(a,b,c) copyout((caddr_t)(a), (caddr_t)(b), (c))
151 # include <inttypes.h>
152 # endif /* _KERNEL */
154 # include <sys/selinfo.h>
155 # include <sys/lock.h>
156 # include <sys/malloc.h>
157 # include <sys/mutex.h>
158 # define KRWLOCK_FILL_SZ 56
159 # define KMUTEX_FILL_SZ 56
160 # include <sys/rwlock.h>
161 # define KMUTEX_T struct mtx
162 # define KRWLOCK_T struct rwlock
165 # define READ_ENTER(x) rw_rlock(&(x)->ipf_lk)
166 # define WRITE_ENTER(x) rw_wlock(&(x)->ipf_lk)
167 # define MUTEX_DOWNGRADE(x) rw_downgrade(&(x)->ipf_lk)
168 # define MUTEX_TRY_UPGRADE(x) rw_try_upgrade(&(x)->ipf_lk)
169 # define RWLOCK_INIT(x,y) rw_init(&(x)->ipf_lk, (y))
170 # define RW_DESTROY(x) rw_destroy(&(x)->ipf_lk)
171 # define RWLOCK_EXIT(x) do { \
172 if (rw_wowned(&(x)->ipf_lk)) \
173 rw_wunlock(&(x)->ipf_lk); \
175 rw_runlock(&(x)->ipf_lk); \
177 # include <net/if_var.h>
178 # define GETKTIME(x) microtime((struct timeval *)x)
179 # define if_addrlist if_addrhead
181 # include <netinet/in_systm.h>
182 # include <netinet/ip.h>
183 # include <machine/in_cksum.h>
186 # define MUTEX_ENTER(x) mtx_lock(&(x)->ipf_lk)
187 # define MUTEX_EXIT(x) mtx_unlock(&(x)->ipf_lk)
188 # define MUTEX_INIT(x,y) mtx_init(&(x)->ipf_lk, (y), NULL,\
190 # define MUTEX_DESTROY(x) mtx_destroy(&(x)->ipf_lk)
191 # define MUTEX_NUKE(x) bzero((x), sizeof(*(x)))
193 * Whilst the sx(9) locks on FreeBSD have the right semantics and interface
194 * for what we want to use them for, despite testing showing they work -
195 * with a WITNESS kernel, it generates LOR messages.
197 # include <machine/atomic.h>
198 # define ATOMIC_INC(x) { mtx_lock(&softc->ipf_rw.ipf_lk); (x)++; \
199 mtx_unlock(&softc->ipf_rw.ipf_lk); }
200 # define ATOMIC_DEC(x) { mtx_lock(&softc->ipf_rw.ipf_lk); (x)--; \
201 mtx_unlock(&softc->ipf_rw.ipf_lk); }
202 # define ATOMIC_INCL(x) atomic_add_long(&(x), 1)
203 # define ATOMIC_INC64(x) ATOMIC_INC(x)
204 # define ATOMIC_INC32(x) atomic_add_32((u_int *)&(x), 1)
205 # define ATOMIC_DECL(x) atomic_add_long(&(x), -1)
206 # define ATOMIC_DEC64(x) ATOMIC_DEC(x)
207 # define ATOMIC_DEC32(x) atomic_add_32((u_int *)&(x), -1)
209 # define SPL_NET(x) ;
210 # define SPL_IMP(x) ;
211 # define SPL_SCHED(x) ;
212 # define GET_MINOR dev2unit
213 # define MSGDSIZE(m) mbufchainlen(m)
214 # define M_LEN(m) (m)->m_len
215 # define M_ADJ(m,x) m_adj(m, x)
216 # define M_COPY(x) m_copym((x), 0, M_COPYALL, M_NOWAIT)
217 # define M_DUP(m) m_dup(m, M_NOWAIT)
218 # define IPF_PANIC(x,y) if (x) { printf y; panic("ipf_panic"); }
219 typedef struct mbuf mb_t;
222 #ifndef _NET_IF_VAR_H_
224 * Userland emulation of struct ifnet.
229 char if_xname[IFNAMSIZ];
230 STAILQ_HEAD(, ifaddr) if_addrlist;
231 int (*if_output)(struct ifnet *, struct mbuf *,
232 const struct sockaddr *, struct route *);
234 #endif /* _NET_IF_VAR_H_ */
237 # define IFNAME(x) ((struct ifnet *)x)->if_xname
238 # define COPYIFNAME(v, x, b) \
240 ((struct ifnet *)x)->if_xname, \
243 typedef u_long ioctlcmd_t;
244 typedef struct uio uio_t;
246 typedef u_int32_t u_32_t;
250 /* ----------------------------------------------------------------------- */
252 /* ----------------------------------------------------------------------- */
255 * For BSD kernels, if bpf is in the kernel, enable ipfilter to use bpf in
258 #if !defined(IPFILTER_BPF)
259 # if (defined(NBPF) && (NBPF > 0)) || (defined(DEV_BPF) && (DEV_BPF > 0)) || \
260 (defined(NBPFILTER) && (NBPFILTER > 0))
261 # define IPFILTER_BPF
266 * Userland locking primitives
269 #if !defined(KMUTEX_FILL_SZ)
270 # define KMUTEX_FILL_SZ 1
272 #if !defined(KRWLOCK_FILL_SZ)
273 # define KRWLOCK_FILL_SZ 1
295 char _fill[KMUTEX_FILL_SZ];
299 const char *ipf_lname;
306 char _fill[KRWLOCK_FILL_SZ];
310 const char *ipf_lname;
319 #define ipf_lk ipf_lkun_s.ipf_slk
320 #define ipf_lname ipf_lkun_s.ipf_lname
321 #define ipf_isr ipf_lkun_s.ipf_sr
322 #define ipf_isw ipf_lkun_s.ipf_sw
323 #define ipf_magic ipf_lkun_s.ipf_magic
325 #if !defined(__GNUC__) || \
326 (defined(__FreeBSD_version) && (__FreeBSD_version >= 503000))
331 # define INLINE __inline__
334 #if defined(__FreeBSD_version) && defined(_KERNEL)
335 CTASSERT(sizeof(ipfrwlock_t) == KRWLOCK_FILL_SZ);
336 CTASSERT(sizeof(ipfmutex_t) == KMUTEX_FILL_SZ);
341 * In a non-kernel environment, there are a lot of macros that need to be
342 * filled in to be null-ops or to point to some compatibility function,
343 * somewhere in userland.
346 typedef struct mb_s {
347 struct mb_s *mb_next;
355 # define m_next mb_next
357 # define m_len mb_len
359 # define m_flags mb_flags
361 # define m_data mb_data
363 # define M_MCAST 0x01
365 # define M_BCAST 0x02
367 # define M_MBCAST 0x04
368 # define MSGDSIZE(m) msgdsize(m)
369 # define M_LEN(m) (m)->mb_len
370 # define M_ADJ(m,x) (m)->mb_len += x
371 # define M_COPY(m) dupmbt(m)
372 # define M_DUP(m) dupmbt(m)
373 # define GETKTIME(x) gettimeofday((struct timeval *)(x), NULL)
374 # define MTOD(m, t) ((t)(m)->mb_data)
375 # define FREE_MB_T(m) freembt(m)
376 # define ALLOC_MB_T(m,l) (m) = allocmbt(l)
377 # define PREP_MB_T(f, m) do { \
378 (m)->mb_next = *(f)->fin_mp; \
379 *(fin)->fin_mp = (m); \
382 # define SLEEP(x,y) 1;
383 # define WAKEUP(x,y) ;
384 # define POLLWAKEUP(y) ;
385 # define IPF_PANIC(x,y) ;
386 # define PANIC(x,y) ;
387 # define SPL_SCHED(x) ;
388 # define SPL_NET(x) ;
389 # define SPL_IMP(x) ;
391 # define KMALLOC(a,b) (a) = (b)malloc(sizeof(*a))
392 # define KMALLOCS(a,b,c) (a) = (b)malloc(c)
393 # define KFREE(x) free(x)
394 # define KFREES(x,s) free(x)
395 # define GETIFP(x, v) get_unit(x,v)
396 # define GETIFMTU_4(x) 2048
397 # define GETIFMTU_6(x) 2048
398 # define COPYIN(a,b,c) bcopywrap((a), (b), (c))
399 # define COPYOUT(a,b,c) bcopywrap((a), (b), (c))
400 # define COPYDATA(m, o, l, b) bcopy(MTOD((mb_t *)m, char *) + (o), \
402 # define COPYBACK(m, o, l, b) bcopy((b), \
403 MTOD((mb_t *)m, char *) + (o), \
405 # define UIOMOVE(a,b,c,d) ipfuiomove((caddr_t)a,b,c,d)
406 extern void m_copydata __P((mb_t *, int, int, caddr_t));
407 extern int ipfuiomove __P((caddr_t, int, int, struct uio *));
408 extern int bcopywrap __P((void *, void *, size_t));
409 extern mb_t *allocmbt __P((size_t));
410 extern mb_t *dupmbt __P((mb_t *));
411 extern void freembt __P((mb_t *));
413 # define MUTEX_DESTROY(x) eMmutex_destroy(&(x)->ipf_emu, \
415 # define MUTEX_ENTER(x) eMmutex_enter(&(x)->ipf_emu, \
417 # define MUTEX_EXIT(x) eMmutex_exit(&(x)->ipf_emu, \
419 # define MUTEX_INIT(x,y) eMmutex_init(&(x)->ipf_emu, y, \
421 # define MUTEX_NUKE(x) bzero((x), sizeof(*(x)))
423 # define MUTEX_DOWNGRADE(x) eMrwlock_downgrade(&(x)->ipf_emu, \
425 # define MUTEX_TRY_UPGRADE(x) eMrwlock_try_upgrade(&(x)->ipf_emu, \
427 # define READ_ENTER(x) eMrwlock_read_enter(&(x)->ipf_emu, \
429 # define RWLOCK_INIT(x, y) eMrwlock_init(&(x)->ipf_emu, y)
430 # define RWLOCK_EXIT(x) eMrwlock_exit(&(x)->ipf_emu)
431 # define RW_DESTROY(x) eMrwlock_destroy(&(x)->ipf_emu)
432 # define WRITE_ENTER(x) eMrwlock_write_enter(&(x)->ipf_emu, \
436 # define USE_MUTEXES 1
438 extern void eMmutex_destroy __P((eMmutex_t *, char *, int));
439 extern void eMmutex_enter __P((eMmutex_t *, char *, int));
440 extern void eMmutex_exit __P((eMmutex_t *, char *, int));
441 extern void eMmutex_init __P((eMmutex_t *, char *, char *, int));
442 extern void eMrwlock_destroy __P((eMrwlock_t *));
443 extern void eMrwlock_exit __P((eMrwlock_t *));
444 extern void eMrwlock_init __P((eMrwlock_t *, char *));
445 extern void eMrwlock_read_enter __P((eMrwlock_t *, char *, int));
446 extern void eMrwlock_write_enter __P((eMrwlock_t *, char *, int));
447 extern void eMrwlock_downgrade __P((eMrwlock_t *, char *, int));
451 extern mb_t *allocmbt(size_t);
453 #define MAX_IPV4HDR ((0xf << 2) + sizeof(struct icmp) + sizeof(ip_t) + 8)
456 # define IP_OFFMASK 0x1fff
461 * On BSD's use quad_t as a guarantee for getting at least a 64bit sized
464 #if !defined(__amd64__) && BSD_GT_YEAR(199306)
466 # define U_QUAD_T unsigned long long
467 # define QUAD_T long long
468 #else /* BSD > 199306 */
469 # if !defined(U_QUAD_T)
470 # define U_QUAD_T u_long
473 #endif /* BSD > 199306 */
477 # if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__) || \
478 defined(__osf__) || defined(linux)
479 # include <netinet/ip6.h>
480 # include <netinet/icmp6.h>
481 # if defined(_KERNEL) && !defined(__osf__)
482 # include <netinet6/ip6_var.h>
484 typedef struct ip6_hdr ip6_t;
489 # define MAX(a,b) (((a) > (b)) ? (a) : (b))
493 # if defined(MENTAT) && !defined(INSTANCES)
494 # define COPYDATA mb_copydata
495 # define COPYBACK mb_copyback
497 # define COPYDATA m_copydata
498 # define COPYBACK m_copyback
500 # if (defined(__NetBSD_Version__) && (__NetBSD_Version__ < 105180000)) || \
501 defined(__FreeBSD__) || (defined(OpenBSD) && (OpenBSD < 200206)) || \
502 defined(_BSDI_VERSION)
505 # if !defined(__FreeBSD__) || FREEBSD_GE_REV(300000)
506 # if NETBSD_GE_REV(105180000) || OPENBSD_GE_REV(200111)
507 # include <uvm/uvm_extern.h>
509 # include <vm/vm_extern.h>
510 extern vm_map_t kmem_map;
512 # include <sys/proc.h>
513 # else /* !__FreeBSD__ || (__FreeBSD__ && __FreeBSD_version >= 300000) */
514 # include <vm/vm_kern.h>
515 # endif /* !__FreeBSD__ || (__FreeBSD__ && __FreeBSD_version >= 300000) */
517 # ifdef IPFILTER_M_IPFILTER
518 # include <sys/malloc.h>
519 MALLOC_DECLARE(M_IPFILTER);
520 # define _M_IPF M_IPFILTER
521 # else /* IPFILTER_M_IPFILTER */
523 # define _M_IPF M_PFIL
526 # define _M_IPF M_IPFILTER
528 # define _M_IPF M_TEMP
529 # endif /* M_IPFILTER */
531 # endif /* IPFILTER_M_IPFILTER */
532 # if !defined(KMALLOC)
533 # define KMALLOC(a, b) (a) = (b)malloc(sizeof(*(a)), _M_IPF, M_NOWAIT)
535 # if !defined(KMALLOCS)
536 # define KMALLOCS(a, b, c) (a) = (b)malloc((c), _M_IPF, M_NOWAIT)
539 # define KFREE(x) free((x), _M_IPF)
541 # if !defined(KFREES)
542 # define KFREES(x,s) free((x), _M_IPF)
544 # define UIOMOVE(a,b,c,d) uiomove((caddr_t)a,b,d)
545 # define SLEEP(id, n) tsleep((id), PPAUSE|PCATCH, n, 0)
546 # define WAKEUP(id,x) wakeup(id+x)
547 # if !defined(POLLWAKEUP)
548 # define POLLWAKEUP(x) selwakeup(softc->ipf_selwait+x)
550 # define GETIFP(n, v) ifunit(n)
551 # define GETIFMTU_4(x) ((struct ifnet *)x)->if_mtu
552 # define GETIFMTU_6(x) ((struct ifnet *)x)->if_mtu
554 # if !defined(USE_MUTEXES) && !defined(SPL_NET)
555 # define SPL_IMP(x) x = splimp()
556 # define SPL_NET(x) x = splnet()
557 # if !defined(SPL_SCHED)
558 # define SPL_SCHED(x) x = splsched()
560 # define SPL_X(x) (void) splx(x)
561 # endif /* !USE_MUTEXES */
564 # define FREE_MB_T(m) m_freem(m)
568 # define ALLOC_MB_T(m,l) do { \
569 MGETHDR((m), M_NOWAIT, MT_HEADER); \
572 (m)->m_pkthdr.len = (l); \
576 # define ALLOC_MB_T(m,l) do { \
577 MGET((m), M_NOWAIT, MT_HEADER); \
580 (m)->m_pkthdr.len = (l); \
586 # define PREP_MB_T(f, m) do { \
587 mb_t *_o = *(f)->fin_mp; \
589 *(fin)->fin_mp = (m); \
590 if (_o->m_flags & M_PKTHDR) { \
591 (m)->m_pkthdr.len += \
593 (m)->m_pkthdr.rcvif = \
594 _o->m_pkthdr.rcvif; \
600 # define M_DUP(m) m_dup(m, 0, M_COPYALL, 0)
602 # define M_DUP(m) m_dup(m)
607 # define MTOD(m,t) mtod(m,t)
611 # define COPYIN(a,b,c) (bcopy((caddr_t)(a), (caddr_t)(b), (c)), 0)
612 # define COPYOUT(a,b,c) (bcopy((caddr_t)(a), (caddr_t)(b), (c)), 0)
616 # define KMALLOC(a,b) (a) = (b)new_kmem_alloc(sizeof(*(a)), \
618 # define KMALLOCS(a,b,c) (a) = (b)new_kmem_alloc((c), KMEM_NOSLEEP)
622 # define GET_MINOR(x) dev2unit(x)
624 # define PANIC(x,y) if (x) panic y
627 #if !defined(IFNAME) && !defined(_KERNEL)
628 # define IFNAME(x) get_ifname((struct ifnet *)x)
631 # define NEED_FRGETIFNAME
632 extern char *ipf_getifname __P((struct ifnet *, char *));
633 # define COPYIFNAME(v, x, b) \
634 ipf_getifname((struct ifnet *)x, b)
641 # define ASSERT(x) do { if (!(x)) abort(); } while (0)
646 # define BCOPYIN(a,b,c) (bcopy((caddr_t)(a), (caddr_t)(b), (c)), 0)
647 # define BCOPYOUT(a,b,c) (bcopy((caddr_t)(a), (caddr_t)(b), (c)), 0)
651 * Because the ctype(3) posix definition, if used "safely" in code everywhere,
652 * would mean all normal code that walks through strings needed casts. Yuck.
654 #define ISALNUM(x) isalnum((u_char)(x))
655 #define ISALPHA(x) isalpha((u_char)(x))
656 #define ISDIGIT(x) isdigit((u_char)(x))
657 #define ISSPACE(x) isspace((u_char)(x))
658 #define ISUPPER(x) isupper((u_char)(x))
659 #define ISXDIGIT(x) isxdigit((u_char)(x))
660 #define ISLOWER(x) islower((u_char)(x))
661 #define TOUPPER(x) toupper((u_char)(x))
662 #define TOLOWER(x) tolower((u_char)(x))
665 * If mutexes aren't being used, turn all the mutex functions into null-ops.
667 #if !defined(USE_MUTEXES)
672 # undef MUTEX_DESTROY
673 # define MUTEX_ENTER(x) ;
674 # define READ_ENTER(x) ;
675 # define WRITE_ENTER(x) ;
676 # define MUTEX_DOWNGRADE(x) ;
677 # define MUTEX_TRY_UPGRADE(x) ;
678 # define RWLOCK_INIT(x, y) ;
679 # define RWLOCK_EXIT(x) ;
680 # define RW_DESTROY(x) ;
681 # define MUTEX_EXIT(x) ;
682 # define MUTEX_INIT(x,y) ;
683 # define MUTEX_DESTROY(x) ;
684 # define MUTEX_NUKE(x) ;
685 #endif /* !USE_MUTEXES */
687 # define ATOMIC_INC(x) (x)++
688 # define ATOMIC_DEC(x) (x)--
691 #if defined(USE_SPL) && defined(_KERNEL)
692 # define SPL_INT(x) int x
698 * If there are no atomic operations for bit sizes defined, define them to all
699 * use a generic one that works for all sizes.
702 # define ATOMIC_INCL ATOMIC_INC
703 # define ATOMIC_INC64 ATOMIC_INC
704 # define ATOMIC_INC32 ATOMIC_INC
705 # define ATOMIC_DECL ATOMIC_DEC
706 # define ATOMIC_DEC64 ATOMIC_DEC
707 # define ATOMIC_DEC32 ATOMIC_DEC
710 #ifndef HDR_T_PRIVATE
711 typedef struct tcphdr tcphdr_t;
712 typedef struct udphdr udphdr_t;
714 typedef struct icmp icmphdr_t;
715 typedef struct ip ip_t;
716 typedef struct ether_header ether_header_t;
717 typedef struct tcpiphdr tcpiphdr_t;
720 # define FR_GROUPLEN 16
724 # define offsetof(t,m) (size_t)((&((t *)0L)->m))
727 # define stsizeof(t,m) sizeof(((t *)0L)->m)
731 * This set of macros has been brought about because on Tru64 it is not
732 * possible to easily assign or examine values in a structure that are
736 # define IP_V(x) (x)->ip_v
739 # define IP_V_A(x,y) (x)->ip_v = (y)
742 # define IP_HL(x) (x)->ip_hl
745 # define IP_HL_A(x,y) (x)->ip_hl = ((y) & 0xf)
748 # define TCP_X2(x) (x)->th_x2
751 # define TCP_X2_A(x,y) (x)->th_x2 = (y)
754 # define TCP_OFF(x) (x)->th_off
757 # define TCP_OFF_A(x,y) (x)->th_off = (y)
759 #define IPMINLEN(i, h) ((i)->ip_len >= (IP_HL(i) * 4 + sizeof(struct h)))
761 #define TCPF_ALL (TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG|\
764 #if BSD_GE_YEAR(199306) && !defined(m_act)
765 # define m_act m_nextpkt
769 * Security Options for Intenet Protocol (IPSO) as defined in RFC 1108.
773 * 00000001 - (Reserved 4)
774 * 00111101 - Top Secret
776 * 10010110 - Confidential
777 * 01100110 - (Reserved 3)
778 * 11001100 - (Reserved 2)
779 * 10101011 - Unclassified
780 * 11110001 - (Reserved 1)
782 #define IPSO_CLASS_RES4 0x01
783 #define IPSO_CLASS_TOPS 0x3d
784 #define IPSO_CLASS_SECR 0x5a
785 #define IPSO_CLASS_CONF 0x96
786 #define IPSO_CLASS_RES3 0x66
787 #define IPSO_CLASS_RES2 0xcc
788 #define IPSO_CLASS_UNCL 0xab
789 #define IPSO_CLASS_RES1 0xf1
791 #define IPSO_AUTH_GENSER 0x80
792 #define IPSO_AUTH_ESI 0x40
793 #define IPSO_AUTH_SCI 0x20
794 #define IPSO_AUTH_NSA 0x10
795 #define IPSO_AUTH_DOE 0x08
796 #define IPSO_AUTH_UN 0x06
797 #define IPSO_AUTH_FTE 0x01
805 #define IPOPT_ZSU 10 /* ZSU */
807 #define IPOPT_MTUP 11 /* MTUP */
809 #define IPOPT_MTUR 12 /* MTUR */
811 #define IPOPT_ENCODE 15 /* ENCODE */
815 #define IPOPT_TR 82 /* TR */
816 #undef IPOPT_SECURITY
817 #define IPOPT_SECURITY 130
819 #define IPOPT_LSRR 131
821 #define IPOPT_E_SEC 133 /* E-SEC */
823 #define IPOPT_CIPSO 134 /* CIPSO */
825 #define IPOPT_SATID 136
827 # define IPOPT_SID IPOPT_SATID
830 #define IPOPT_SSRR 137
832 #define IPOPT_ADDEXT 147 /* ADDEXT */
834 #define IPOPT_VISA 142 /* VISA */
836 #define IPOPT_IMITD 144 /* IMITD */
838 #define IPOPT_EIP 145 /* EIP */
840 #define IPOPT_RTRALRT 148 /* RTRALRT */
842 #define IPOPT_SDB 149
844 #define IPOPT_NSAPA 150
846 #define IPOPT_DPS 151
848 #define IPOPT_UMP 152
850 #define IPOPT_FINN 205 /* FINN */
852 #define IPOPT_AH 256+IPPROTO_AH
855 # define TCPOPT_EOL 0
858 # define TCPOPT_NOP 1
860 #ifndef TCPOPT_MAXSEG
861 # define TCPOPT_MAXSEG 2
863 #ifndef TCPOLEN_MAXSEG
864 # define TCPOLEN_MAXSEG 4
866 #ifndef TCPOPT_WINDOW
867 # define TCPOPT_WINDOW 3
869 #ifndef TCPOLEN_WINDOW
870 # define TCPOLEN_WINDOW 3
872 #ifndef TCPOPT_SACK_PERMITTED
873 # define TCPOPT_SACK_PERMITTED 4
875 #ifndef TCPOLEN_SACK_PERMITTED
876 # define TCPOLEN_SACK_PERMITTED 2
879 # define TCPOPT_SACK 5
881 #ifndef TCPOPT_TIMESTAMP
882 # define TCPOPT_TIMESTAMP 8
886 # define ICMP_MINLEN 8
888 #ifndef ICMP_ECHOREPLY
889 # define ICMP_ECHOREPLY 0
892 # define ICMP_UNREACH 3
894 #ifndef ICMP_UNREACH_NET
895 # define ICMP_UNREACH_NET 0
897 #ifndef ICMP_UNREACH_HOST
898 # define ICMP_UNREACH_HOST 1
900 #ifndef ICMP_UNREACH_PROTOCOL
901 # define ICMP_UNREACH_PROTOCOL 2
903 #ifndef ICMP_UNREACH_PORT
904 # define ICMP_UNREACH_PORT 3
906 #ifndef ICMP_UNREACH_NEEDFRAG
907 # define ICMP_UNREACH_NEEDFRAG 4
909 #ifndef ICMP_UNREACH_SRCFAIL
910 # define ICMP_UNREACH_SRCFAIL 5
912 #ifndef ICMP_UNREACH_NET_UNKNOWN
913 # define ICMP_UNREACH_NET_UNKNOWN 6
915 #ifndef ICMP_UNREACH_HOST_UNKNOWN
916 # define ICMP_UNREACH_HOST_UNKNOWN 7
918 #ifndef ICMP_UNREACH_ISOLATED
919 # define ICMP_UNREACH_ISOLATED 8
921 #ifndef ICMP_UNREACH_NET_PROHIB
922 # define ICMP_UNREACH_NET_PROHIB 9
924 #ifndef ICMP_UNREACH_HOST_PROHIB
925 # define ICMP_UNREACH_HOST_PROHIB 10
927 #ifndef ICMP_UNREACH_TOSNET
928 # define ICMP_UNREACH_TOSNET 11
930 #ifndef ICMP_UNREACH_TOSHOST
931 # define ICMP_UNREACH_TOSHOST 12
933 #ifndef ICMP_UNREACH_ADMIN_PROHIBIT
934 # define ICMP_UNREACH_ADMIN_PROHIBIT 13
936 #ifndef ICMP_UNREACH_FILTER
937 # define ICMP_UNREACH_FILTER 13
939 #ifndef ICMP_UNREACH_HOST_PRECEDENCE
940 # define ICMP_UNREACH_HOST_PRECEDENCE 14
942 #ifndef ICMP_UNREACH_PRECEDENCE_CUTOFF
943 # define ICMP_UNREACH_PRECEDENCE_CUTOFF 15
945 #ifndef ICMP_SOURCEQUENCH
946 # define ICMP_SOURCEQUENCH 4
948 #ifndef ICMP_REDIRECT_NET
949 # define ICMP_REDIRECT_NET 0
951 #ifndef ICMP_REDIRECT_HOST
952 # define ICMP_REDIRECT_HOST 1
954 #ifndef ICMP_REDIRECT_TOSNET
955 # define ICMP_REDIRECT_TOSNET 2
957 #ifndef ICMP_REDIRECT_TOSHOST
958 # define ICMP_REDIRECT_TOSHOST 3
960 #ifndef ICMP_ALTHOSTADDR
961 # define ICMP_ALTHOSTADDR 6
963 #ifndef ICMP_TIMXCEED
964 # define ICMP_TIMXCEED 11
966 #ifndef ICMP_TIMXCEED_INTRANS
967 # define ICMP_TIMXCEED_INTRANS 0
969 #ifndef ICMP_TIMXCEED_REASS
970 # define ICMP_TIMXCEED_REASS 1
972 #ifndef ICMP_PARAMPROB
973 # define ICMP_PARAMPROB 12
975 #ifndef ICMP_PARAMPROB_ERRATPTR
976 # define ICMP_PARAMPROB_ERRATPTR 0
978 #ifndef ICMP_PARAMPROB_OPTABSENT
979 # define ICMP_PARAMPROB_OPTABSENT 1
981 #ifndef ICMP_PARAMPROB_LENGTH
982 # define ICMP_PARAMPROB_LENGTH 2
985 # define ICMP_TSTAMP 13
987 #ifndef ICMP_TSTAMPREPLY
988 # define ICMP_TSTAMPREPLY 14
991 # define ICMP_IREQ 15
993 #ifndef ICMP_IREQREPLY
994 # define ICMP_IREQREPLY 16
997 # define ICMP_MASKREQ 17
999 #ifndef ICMP_MASKREPLY
1000 # define ICMP_MASKREPLY 18
1002 #ifndef ICMP_TRACEROUTE
1003 # define ICMP_TRACEROUTE 30
1005 #ifndef ICMP_DATACONVERR
1006 # define ICMP_DATACONVERR 31
1008 #ifndef ICMP_MOBILE_REDIRECT
1009 # define ICMP_MOBILE_REDIRECT 32
1011 #ifndef ICMP_IPV6_WHEREAREYOU
1012 # define ICMP_IPV6_WHEREAREYOU 33
1014 #ifndef ICMP_IPV6_IAMHERE
1015 # define ICMP_IPV6_IAMHERE 34
1017 #ifndef ICMP_MOBILE_REGREQUEST
1018 # define ICMP_MOBILE_REGREQUEST 35
1020 #ifndef ICMP_MOBILE_REGREPLY
1021 # define ICMP_MOBILE_REGREPLY 36
1024 # define ICMP_SKIP 39
1026 #ifndef ICMP_PHOTURIS
1027 # define ICMP_PHOTURIS 40
1029 #ifndef ICMP_PHOTURIS_UNKNOWN_INDEX
1030 # define ICMP_PHOTURIS_UNKNOWN_INDEX 1
1032 #ifndef ICMP_PHOTURIS_AUTH_FAILED
1033 # define ICMP_PHOTURIS_AUTH_FAILED 2
1035 #ifndef ICMP_PHOTURIS_DECRYPT_FAILED
1036 # define ICMP_PHOTURIS_DECRYPT_FAILED 3
1039 # define IPVERSION 4
1041 #ifndef IPOPT_MINOFF
1042 # define IPOPT_MINOFF 4
1044 #ifndef IPOPT_COPIED
1045 # define IPOPT_COPIED(x) ((x)&0x80)
1048 # define IPOPT_EOL 0
1051 # define IPOPT_NOP 1
1054 # define IP_MF ((u_short)0x2000)
1056 #ifndef ETHERTYPE_IP
1057 # define ETHERTYPE_IP ((u_short)0x0800)
1060 # define TH_FIN 0x01
1063 # define TH_SYN 0x02
1066 # define TH_RST 0x04
1069 # define TH_PUSH 0x08
1072 # define TH_ACK 0x10
1075 # define TH_URG 0x20
1078 #define TH_ACKMASK (TH_FIN|TH_SYN|TH_RST|TH_ACK)
1081 # define IPOPT_EOL 0
1084 # define IPOPT_NOP 1
1090 # define IPOPT_TS 68
1092 #ifndef IPOPT_SECURITY
1093 # define IPOPT_SECURITY 130
1096 # define IPOPT_LSRR 131
1099 # define IPOPT_SATID 136
1102 # define IPOPT_SSRR 137
1104 #ifndef IPOPT_SECUR_UNCLASS
1105 # define IPOPT_SECUR_UNCLASS ((u_short)0x0000)
1107 #ifndef IPOPT_SECUR_CONFID
1108 # define IPOPT_SECUR_CONFID ((u_short)0xf135)
1110 #ifndef IPOPT_SECUR_EFTO
1111 # define IPOPT_SECUR_EFTO ((u_short)0x789a)
1113 #ifndef IPOPT_SECUR_MMMM
1114 # define IPOPT_SECUR_MMMM ((u_short)0xbc4d)
1116 #ifndef IPOPT_SECUR_RESTR
1117 # define IPOPT_SECUR_RESTR ((u_short)0xaf13)
1119 #ifndef IPOPT_SECUR_SECRET
1120 # define IPOPT_SECUR_SECRET ((u_short)0xd788)
1122 #ifndef IPOPT_SECUR_TOPSECRET
1123 # define IPOPT_SECUR_TOPSECRET ((u_short)0x6bc5)
1126 # define IPOPT_OLEN 1
1128 #ifndef IPPROTO_HOPOPTS
1129 # define IPPROTO_HOPOPTS 0
1131 #ifndef IPPROTO_IPIP
1132 # define IPPROTO_IPIP 4
1134 #ifndef IPPROTO_ENCAP
1135 # define IPPROTO_ENCAP 98
1137 #ifndef IPPROTO_IPV6
1138 # define IPPROTO_IPV6 41
1140 #ifndef IPPROTO_ROUTING
1141 # define IPPROTO_ROUTING 43
1143 #ifndef IPPROTO_FRAGMENT
1144 # define IPPROTO_FRAGMENT 44
1147 # define IPPROTO_GRE 47 /* GRE encaps RFC 1701 */
1150 # define IPPROTO_ESP 50
1153 # define IPPROTO_AH 51
1155 #ifndef IPPROTO_ICMPV6
1156 # define IPPROTO_ICMPV6 58
1158 #ifndef IPPROTO_NONE
1159 # define IPPROTO_NONE 59
1161 #ifndef IPPROTO_DSTOPTS
1162 # define IPPROTO_DSTOPTS 60
1164 #ifndef IPPROTO_MOBILITY
1165 # define IPPROTO_MOBILITY 135
1168 #ifndef ICMP_ROUTERADVERT
1169 # define ICMP_ROUTERADVERT 9
1171 #ifndef ICMP_ROUTERSOLICIT
1172 # define ICMP_ROUTERSOLICIT 10
1174 #ifndef ICMP6_DST_UNREACH
1175 # define ICMP6_DST_UNREACH 1
1177 #ifndef ICMP6_PACKET_TOO_BIG
1178 # define ICMP6_PACKET_TOO_BIG 2
1180 #ifndef ICMP6_TIME_EXCEEDED
1181 # define ICMP6_TIME_EXCEEDED 3
1183 #ifndef ICMP6_PARAM_PROB
1184 # define ICMP6_PARAM_PROB 4
1187 #ifndef ICMP6_ECHO_REQUEST
1188 # define ICMP6_ECHO_REQUEST 128
1190 #ifndef ICMP6_ECHO_REPLY
1191 # define ICMP6_ECHO_REPLY 129
1193 #ifndef ICMP6_MEMBERSHIP_QUERY
1194 # define ICMP6_MEMBERSHIP_QUERY 130
1196 #ifndef MLD6_LISTENER_QUERY
1197 # define MLD6_LISTENER_QUERY 130
1199 #ifndef ICMP6_MEMBERSHIP_REPORT
1200 # define ICMP6_MEMBERSHIP_REPORT 131
1202 #ifndef MLD6_LISTENER_REPORT
1203 # define MLD6_LISTENER_REPORT 131
1205 #ifndef ICMP6_MEMBERSHIP_REDUCTION
1206 # define ICMP6_MEMBERSHIP_REDUCTION 132
1208 #ifndef MLD6_LISTENER_DONE
1209 # define MLD6_LISTENER_DONE 132
1211 #ifndef ND_ROUTER_SOLICIT
1212 # define ND_ROUTER_SOLICIT 133
1214 #ifndef ND_ROUTER_ADVERT
1215 # define ND_ROUTER_ADVERT 134
1217 #ifndef ND_NEIGHBOR_SOLICIT
1218 # define ND_NEIGHBOR_SOLICIT 135
1220 #ifndef ND_NEIGHBOR_ADVERT
1221 # define ND_NEIGHBOR_ADVERT 136
1224 # define ND_REDIRECT 137
1226 #ifndef ICMP6_ROUTER_RENUMBERING
1227 # define ICMP6_ROUTER_RENUMBERING 138
1229 #ifndef ICMP6_WRUREQUEST
1230 # define ICMP6_WRUREQUEST 139
1232 #ifndef ICMP6_WRUREPLY
1233 # define ICMP6_WRUREPLY 140
1235 #ifndef ICMP6_FQDN_QUERY
1236 # define ICMP6_FQDN_QUERY 139
1238 #ifndef ICMP6_FQDN_REPLY
1239 # define ICMP6_FQDN_REPLY 140
1241 #ifndef ICMP6_NI_QUERY
1242 # define ICMP6_NI_QUERY 139
1244 #ifndef ICMP6_NI_REPLY
1245 # define ICMP6_NI_REPLY 140
1247 #ifndef MLD6_MTRACE_RESP
1248 # define MLD6_MTRACE_RESP 200
1251 # define MLD6_MTRACE 201
1253 #ifndef ICMP6_HADISCOV_REQUEST
1254 # define ICMP6_HADISCOV_REQUEST 202
1256 #ifndef ICMP6_HADISCOV_REPLY
1257 # define ICMP6_HADISCOV_REPLY 203
1259 #ifndef ICMP6_MOBILEPREFIX_SOLICIT
1260 # define ICMP6_MOBILEPREFIX_SOLICIT 204
1262 #ifndef ICMP6_MOBILEPREFIX_ADVERT
1263 # define ICMP6_MOBILEPREFIX_ADVERT 205
1265 #ifndef ICMP6_MAXTYPE
1266 # define ICMP6_MAXTYPE 205
1269 #ifndef ICMP6_DST_UNREACH_NOROUTE
1270 # define ICMP6_DST_UNREACH_NOROUTE 0
1272 #ifndef ICMP6_DST_UNREACH_ADMIN
1273 # define ICMP6_DST_UNREACH_ADMIN 1
1275 #ifndef ICMP6_DST_UNREACH_NOTNEIGHBOR
1276 # define ICMP6_DST_UNREACH_NOTNEIGHBOR 2
1278 #ifndef ICMP6_DST_UNREACH_BEYONDSCOPE
1279 # define ICMP6_DST_UNREACH_BEYONDSCOPE 2
1281 #ifndef ICMP6_DST_UNREACH_ADDR
1282 # define ICMP6_DST_UNREACH_ADDR 3
1284 #ifndef ICMP6_DST_UNREACH_NOPORT
1285 # define ICMP6_DST_UNREACH_NOPORT 4
1287 #ifndef ICMP6_TIME_EXCEED_TRANSIT
1288 # define ICMP6_TIME_EXCEED_TRANSIT 0
1290 #ifndef ICMP6_TIME_EXCEED_REASSEMBLY
1291 # define ICMP6_TIME_EXCEED_REASSEMBLY 1
1294 #ifndef ICMP6_NI_SUCCESS
1295 # define ICMP6_NI_SUCCESS 0
1297 #ifndef ICMP6_NI_REFUSED
1298 # define ICMP6_NI_REFUSED 1
1300 #ifndef ICMP6_NI_UNKNOWN
1301 # define ICMP6_NI_UNKNOWN 2
1304 #ifndef ICMP6_ROUTER_RENUMBERING_COMMAND
1305 # define ICMP6_ROUTER_RENUMBERING_COMMAND 0
1307 #ifndef ICMP6_ROUTER_RENUMBERING_RESULT
1308 # define ICMP6_ROUTER_RENUMBERING_RESULT 1
1310 #ifndef ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET
1311 # define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255
1314 #ifndef ICMP6_PARAMPROB_HEADER
1315 # define ICMP6_PARAMPROB_HEADER 0
1317 #ifndef ICMP6_PARAMPROB_NEXTHEADER
1318 # define ICMP6_PARAMPROB_NEXTHEADER 1
1320 #ifndef ICMP6_PARAMPROB_OPTION
1321 # define ICMP6_PARAMPROB_OPTION 2
1324 #ifndef ICMP6_NI_SUBJ_IPV6
1325 # define ICMP6_NI_SUBJ_IPV6 0
1327 #ifndef ICMP6_NI_SUBJ_FQDN
1328 # define ICMP6_NI_SUBJ_FQDN 1
1330 #ifndef ICMP6_NI_SUBJ_IPV4
1331 # define ICMP6_NI_SUBJ_IPV4 2
1334 #ifndef MLD_MTRACE_RESP
1335 # define MLD_MTRACE_RESP 200
1338 # define MLD_MTRACE 201
1340 #ifndef MLD6_MTRACE_RESP
1341 # define MLD6_MTRACE_RESP MLD_MTRACE_RESP
1344 # define MLD6_MTRACE MLD_MTRACE
1347 #if !defined(IPV6_FLOWINFO_MASK)
1348 # if (BYTE_ORDER == BIG_ENDIAN) || defined(_BIG_ENDIAN)
1349 # define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */
1351 # if(BYTE_ORDER == LITTLE_ENDIAN) || !defined(_BIG_ENDIAN)
1352 # define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */
1353 # endif /* LITTLE_ENDIAN */
1356 #if !defined(IPV6_FLOWLABEL_MASK)
1357 # if (BYTE_ORDER == BIG_ENDIAN) || defined(_BIG_ENDIAN)
1358 # define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */
1360 # if (BYTE_ORDER == LITTLE_ENDIAN) || !defined(_BIG_ENDIAN)
1361 # define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */
1362 # endif /* LITTLE_ENDIAN */
1367 * ECN is a new addition to TCP - RFC 2481
1370 # define TH_ECN 0x40
1373 # define TH_CWR 0x80
1375 #define TH_ECNALL (TH_ECN|TH_CWR)
1380 #define IPF_TCPS_LISTEN 0 /* listening for connection */
1381 #define IPF_TCPS_SYN_SENT 1 /* active, have sent syn */
1382 #define IPF_TCPS_SYN_RECEIVED 2 /* have send and received syn */
1383 #define IPF_TCPS_HALF_ESTAB 3 /* for connections not fully "up" */
1384 /* states < IPF_TCPS_ESTABLISHED are those where connections not established */
1385 #define IPF_TCPS_ESTABLISHED 4 /* established */
1386 #define IPF_TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
1387 /* states > IPF_TCPS_CLOSE_WAIT are those where user has closed */
1388 #define IPF_TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
1389 #define IPF_TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */
1390 #define IPF_TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
1391 /* states > IPF_TCPS_CLOSE_WAIT && < IPF_TCPS_FIN_WAIT_2 await ACK of FIN */
1392 #define IPF_TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
1393 #define IPF_TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
1394 #define IPF_TCPS_CLOSED 11 /* closed */
1395 #define IPF_TCP_NSTATES 12
1399 #undef ICMP_MAX_UNREACH
1400 #define ICMP_MAX_UNREACH 14
1402 #define ICMP_MAXTYPE 18
1405 # define LOG_FTP (11<<3)
1407 #ifndef LOG_AUTHPRIV
1408 # define LOG_AUTHPRIV (10<<3)
1411 # define LOG_AUDIT (13<<3)
1414 # define LOG_NTP (12<<3)
1416 #ifndef LOG_SECURITY
1417 # define LOG_SECURITY (13<<3)
1420 # define LOG_LFMT (14<<3)
1423 # define LOG_CONSOLE (14<<3)
1427 * ICMP error replies have an IP header (20 bytes), 8 bytes of ICMP data,
1428 * another IP header and then 64 bits of data, totalling 56. Of course,
1429 * the last 64 bits is dependent on that being available.
1431 #define ICMPERR_ICMPHLEN 8
1432 #define ICMPERR_IPICMPHLEN (20 + 8)
1433 #define ICMPERR_MINPKTLEN (20 + 8 + 20)
1434 #define ICMPERR_MAXPKTLEN (20 + 8 + 20 + 8)
1435 #define ICMP6ERR_MINPKTLEN (40 + 8)
1436 #define ICMP6ERR_IPICMPHLEN (40 + 8 + 40)
1439 # define MIN(a,b) (((a)<(b))?(a):(b))
1443 # undef IPFILTER_BPF
1447 # define DPRINT(x) printf x
1454 # define DT(_n) DTRACE_PROBE(_n)
1455 # define DT1(_n,_a,_b) DTRACE_PROBE1(_n,_a,_b)
1456 # define DT2(_n,_a,_b,_c,_d) DTRACE_PROBE2(_n,_a,_b,_c,_d)
1457 # define DT3(_n,_a,_b,_c,_d,_e,_f) \
1458 DTRACE_PROBE3(_n,_a,_b,_c,_d,_e,_f)
1459 # define DT4(_n,_a,_b,_c,_d,_e,_f,_g,_h) \
1460 DTRACE_PROBE4(_n,_a,_b,_c,_d,_e,_f,_g,_h)
1463 # define DT1(_n,_a,_b)
1464 # define DT2(_n,_a,_b,_c,_d)
1465 # define DT3(_n,_a,_b,_c,_d,_e,_f)
1466 # define DT4(_n,_a,_b,_c,_d,_e,_f,_g,_h)
1470 # define DT1(_n,_a,_b)
1471 # define DT2(_n,_a,_b,_c,_d)
1472 # define DT3(_n,_a,_b,_c,_d,_e,_f)
1473 # define DT4(_n,_a,_b,_c,_d,_e,_f,_g,_h)
1476 struct ip6_routing {
1477 u_char ip6r_nxt; /* next header */
1478 u_char ip6r_len; /* length in units of 8 octets */
1479 u_char ip6r_type; /* always zero */
1480 u_char ip6r_segleft; /* segments left */
1481 u_32_t ip6r_reserved; /* reserved field */
1484 #endif /* __IP_COMPAT_H__ */