/root/freebsd/sys/netinet6/ip6

Bug Summary

File:	netinet6/ip6_output.c
Warning:	line 2419, column 10 Copies out a struct with untouched element(s): ipi6_ifindex
Annotated Source Code

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clang -cc1 -triple x86_64-unknown-freebsd11.2 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ip6_output.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model static -mthread-model posix -mdisable-fp-elim -relaxed-aliasing -masm-verbose -mconstructor-aliases -ffreestanding -mcode-model kernel -target-cpu x86-64 -target-feature -mmx -target-feature -sse -target-feature -aes -target-feature -avx -disable-red-zone -no-implicit-float -dwarf-column-info -debugger-tuning=gdb -nostdsysteminc -nobuiltininc -resource-dir /root/kernel-uninitialized-memory-checker/build/lib/clang/8.0.0 -include opt_global.h -I . -I /root/freebsd/sys -I /root/freebsd/sys/contrib/ck/include -I /root/freebsd/sys/contrib/libfdt -D _KERNEL -D HAVE_KERNEL_OPTION_HEADERS -D __printf__=__freebsd_kprintf__ -O2 -Wno-pointer-sign -Wno-unknown-pragmas -Wno-error-tautological-compare -Wno-error-empty-body -Wno-error-parentheses-equality -Wno-error-unused-function -Wno-error-pointer-sign -Wno-error-shift-negative-value -Wno-address-of-packed-member -std=iso9899:1999 -fdebug-compilation-dir /usr/obj/root/freebsd/amd64.amd64/sys/GENERIC -ferror-limit 19 -fmessage-length 0 -fwrapv -stack-protector 1 -fobjc-runtime=gnustep -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-checker alpha.security.KernelMemoryDisclosure -analyzer-disable-checker core,unix,deadcode,nullability -analyzer-output=html -o /root/analyzer/2018-12-28-044519-76292-1 -x c /root/freebsd/sys/netinet6/ip6_output.c -faddrsig
1/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*	$KAME: ip6_output.c,v 1.279 2002/01/26 06:12:30 jinmei Exp $
*/

34/*-
* Copyright (c) 1982, 1986, 1988, 1990, 1993
*	The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*	@(#)ip_output.c	8.3 (Berkeley) 1/21/94
*/

65#include <sys/cdefs.h>
66__FBSDID("$FreeBSD$")__asm__(".ident\t\"" "$FreeBSD$" "\"");

68#include "opt_inet.h"
69#include "opt_inet6.h"
70#include "opt_ratelimit.h"
71#include "opt_ipsec.h"
72#include "opt_sctp.h"
73#include "opt_route.h"
74#include "opt_rss.h"

76#include <sys/param.h>
77#include <sys/kernel.h>
78#include <sys/malloc.h>
79#include <sys/mbuf.h>
80#include <sys/errno.h>
81#include <sys/priv.h>
82#include <sys/proc.h>
83#include <sys/protosw.h>
84#include <sys/socket.h>
85#include <sys/socketvar.h>
86#include <sys/syslog.h>
87#include <sys/ucred.h>

89#include <machine/in_cksum.h>

91#include <net/if.h>
92#include <net/if_var.h>
93#include <net/if_llatbl.h>
94#include <net/netisr.h>
95#include <net/route.h>
96#include <net/pfil.h>
97#include <net/rss_config.h>
98#include <net/vnet.h>

100#include <netinet/in.h>
101#include <netinet/in_var.h>
102#include <netinet/ip_var.h>
103#include <netinet6/in6_fib.h>
104#include <netinet6/in6_var.h>
105#include <netinet/ip6.h>
106#include <netinet/icmp6.h>
107#include <netinet6/ip6_var.h>
108#include <netinet/in_pcb.h>
109#include <netinet/tcp_var.h>
110#include <netinet6/nd6.h>
111#include <netinet6/in6_rss.h>

113#include <netipsec/ipsec_support.h>
114#ifdef SCTP1
115#include <netinet/sctp.h>
116#include <netinet/sctp_crc32.h>
117#endif

119#include <netinet6/ip6protosw.h>
120#include <netinet6/scope6_var.h>

122extern int in6_mcast_loop;

124struct ip6_exthdrs {
struct mbuf *ip6e_ip6;
struct mbuf *ip6e_hbh;
struct mbuf *ip6e_dest1;
struct mbuf *ip6e_rthdr;
struct mbuf *ip6e_dest2;
130};

132static MALLOC_DEFINE(M_IP6OPT, "ip6opt", "IPv6 options")struct malloc_type M_IP6OPT[1] = { { ((void *)0), 877983977, "ip6opt"
, ((void *)0) } }; static struct sysinit M_IP6OPT_init_sys_init
 = { SI_SUB_KMEM, SI_ORDER_THIRD, (sysinit_cfunc_t)(sysinit_nfunc_t
)malloc_init, ((void *)(M_IP6OPT)) }; __asm__(".globl " "__start_set_sysinit_set"
); __asm__(".globl " "__stop_set_sysinit_set"); static void const
 * __set_sysinit_set_sym_M_IP6OPT_init_sys_init __attribute__
((__section__("set_" "sysinit_set"))) __attribute__((__used__
)) = &(M_IP6OPT_init_sys_init); static struct sysinit M_IP6OPT_uninit_sys_uninit
 = { SI_SUB_KMEM, SI_ORDER_ANY, (sysinit_cfunc_t)(sysinit_nfunc_t
)malloc_uninit, ((void *)(M_IP6OPT)) }; __asm__(".globl " "__start_set_sysuninit_set"
); __asm__(".globl " "__stop_set_sysuninit_set"); static void
 const * __set_sysuninit_set_sym_M_IP6OPT_uninit_sys_uninit __attribute__
((__section__("set_" "sysuninit_set"))) __attribute__((__used__
)) = &(M_IP6OPT_uninit_sys_uninit);

134static int ip6_pcbopt(int, u_char *, int, struct ip6_pktopts **,
	   struct ucred *, int);
136static int ip6_pcbopts(struct ip6_pktopts **, struct mbuf *,
struct socket *, struct sockopt *);
138static int ip6_getpcbopt(struct inpcb *, int, struct sockopt *);
139static int ip6_setpktopt(int, u_char *, int, struct ip6_pktopts *,
struct ucred *, int, int, int);

142static int ip6_copyexthdr(struct mbuf **, caddr_t, int);
143static int ip6_insertfraghdr(struct mbuf *, struct mbuf *, int,
struct ip6_frag **);
145static int ip6_insert_jumboopt(struct ip6_exthdrs *, u_int32_t);
146static int ip6_splithdr(struct mbuf *, struct ip6_exthdrs *);
147static int ip6_getpmtu(struct route_in6 *, int,
struct ifnet *, const struct in6_addr *, u_long *, int *, u_int,
u_int);
150static int ip6_calcmtu(struct ifnet *, const struct in6_addr *, u_long,
u_long *, int *, u_int);
152static int ip6_getpmtu_ctl(u_int, const struct in6_addr *, u_long *);
153static int copypktopts(struct ip6_pktopts *, struct ip6_pktopts *, int);


156/*
* Make an extension header from option data.  hp is the source, and
* mp is the destination.
*/
160#define MAKE_EXTHDR(hp, mp)do { if (hp) { struct ip6_ext *eh = (struct ip6_ext *)(hp); error
 = ip6_copyexthdr((mp), (caddr_t)(hp), ((eh)->ip6e_len + 1
) << 3); if (error) goto freehdrs; } } while ( 0)						\
  do {								\
if (hp) {							\
struct ip6_ext *eh = (struct ip6_ext *)(hp);		\
error = ip6_copyexthdr((mp), (caddr_t)(hp),		\
    ((eh)->ip6e_len + 1) << 3);				\
if (error)						\
	goto freehdrs;					\
}								\
  } while (/*CONSTCOND*/ 0)

171/*
* Form a chain of extension headers.
* m is the extension header mbuf
* mp is the previous mbuf in the chain
* p is the next header
* i is the type of option.
*/
178#define MAKE_CHAIN(m, mp, p, i)do { if (m) { if (!hdrsplit) panic("assumption failed: hdr not split"
); *((u_char *)(((m))->m_data)) = *(p); *(p) = (i); p = ((
u_char *)(((m))->m_data)); (m)->m_next = (mp)->m_next
; (mp)->m_next = (m); (mp) = (m); } } while ( 0)\
  do {\
if (m) {\
if (!hdrsplit) \
	panic("assumption failed: hdr not split"); \
*mtod((m), u_char *)((u_char *)(((m))->m_data)) = *(p);\
*(p) = (i);\
p = mtod((m), u_char *)((u_char *)(((m))->m_data));\
(m)->m_next = (mp)->m_next;\
(mp)->m_next = (m);\
(mp) = (m);\
}\
  } while (/*CONSTCOND*/ 0)

192void
193in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset)
194{
u_short csum;

csum = in_cksum_skip(m, offset + plen, offset);
if (m->m_pkthdr.csum_flags & CSUM_UDP_IPV60x00000200 && csum == 0)
csum = 0xffff;
offset += m->m_pkthdr.csum_dataPH_per.thirtytwo[1];	/* checksum offset */

if (offset + sizeof(csum) > m->m_len)
m_copyback(m, offset, sizeof(csum), (caddr_t)&csum);
else
*(u_short *)mtodo(m, offset)((void *)(((m)->m_data) + (offset))) = csum;
206}

208int
209ip6_fragment(struct ifnet *ifp, struct mbuf *m0, int hlen, u_char nextproto,
  int fraglen , uint32_t id)
211{
struct mbuf *m, **mnext, *m_frgpart;
struct ip6_hdr *ip6, *mhip6;
struct ip6_frag *ip6f;
int off;
int error;
int tlen = m0->m_pkthdr.len;

KASSERT((fraglen % 8 == 0), ("Fragment length must be a multiple of 8"))do { if (__builtin_expect((!((fraglen % 8 == 0))), 0)) panic (
"Fragment length must be a multiple of 8"); } while (0);

m = m0;
ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_data));
mnext = &m->m_nextpkt;

for (off = hlen; off < tlen; off += fraglen) {
m = m_gethdr(M_NOWAIT0x0001, MT_DATA1);
if (!m) {
	IP6STAT_INC(ip6s_odropped)counter_u64_add((*(__typeof(vnet_entry_ip6stat)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6stat
))[__builtin_offsetof(struct ip6stat, ip6s_odropped) / sizeof
(uint64_t)], ((1)));
	return (ENOBUFS55);
}
m->m_flags = m0->m_flags & M_COPYFLAGS(0x00000002|0x00000004|0x00000008|0x00000010|0x00000020|0x00000040
|0x00000080|0x00000400| 0x00000800|(0x00001000|0x00002000|0x00004000
|0x00008000|0x00010000|0x00020000|0x00040000|0x00080000| 0x00100000
|0x00200000|0x00400000|0x00800000));
*mnext = m;
mnext = &m->m_nextpkt;
m->m_data += max_linkhdr;
mhip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_data));
*mhip6 = *ip6;
m->m_len = sizeof(*mhip6);
error = ip6_insertfraghdr(m0, m, hlen, &ip6f);
if (error) {
	IP6STAT_INC(ip6s_odropped)counter_u64_add((*(__typeof(vnet_entry_ip6stat)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6stat
))[__builtin_offsetof(struct ip6stat, ip6s_odropped) / sizeof
(uint64_t)], ((1)));
	return (error);
}
ip6f->ip6f_offlg = htons((u_short)((off - hlen) & ~7))((__uint16_t)(__builtin_constant_p((u_short)((off - hlen) &
 ~7)) ? (__uint16_t)(((__uint16_t)((u_short)((off - hlen) &
 ~7))) << 8 | ((__uint16_t)((u_short)((off - hlen) &
 ~7))) >> 8) : __bswap16_var((u_short)((off - hlen) &
 ~7))));
if (off + fraglen >= tlen)
	fraglen = tlen - off;
else
	ip6f->ip6f_offlg |= IP6F_MORE_FRAG0x0100;
mhip6->ip6_plenip6_ctlun.ip6_un1.ip6_un1_plen = htons((u_short)(fraglen + hlen +((__uint16_t)(__builtin_constant_p((u_short)(fraglen + hlen +
 sizeof(*ip6f) - sizeof(struct ip6_hdr))) ? (__uint16_t)(((__uint16_t
)((u_short)(fraglen + hlen + sizeof(*ip6f) - sizeof(struct ip6_hdr
)))) << 8 | ((__uint16_t)((u_short)(fraglen + hlen + sizeof
(*ip6f) - sizeof(struct ip6_hdr)))) >> 8) : __bswap16_var
((u_short)(fraglen + hlen + sizeof(*ip6f) - sizeof(struct ip6_hdr
)))))
    sizeof(*ip6f) - sizeof(struct ip6_hdr)))((__uint16_t)(__builtin_constant_p((u_short)(fraglen + hlen +
 sizeof(*ip6f) - sizeof(struct ip6_hdr))) ? (__uint16_t)(((__uint16_t
)((u_short)(fraglen + hlen + sizeof(*ip6f) - sizeof(struct ip6_hdr
)))) << 8 | ((__uint16_t)((u_short)(fraglen + hlen + sizeof
(*ip6f) - sizeof(struct ip6_hdr)))) >> 8) : __bswap16_var
((u_short)(fraglen + hlen + sizeof(*ip6f) - sizeof(struct ip6_hdr
)))));
if ((m_frgpart = m_copym(m0, off, fraglen, M_NOWAIT0x0001)) == NULL((void *)0)) {
	IP6STAT_INC(ip6s_odropped)counter_u64_add((*(__typeof(vnet_entry_ip6stat)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6stat
))[__builtin_offsetof(struct ip6stat, ip6s_odropped) / sizeof
(uint64_t)], ((1)));
	return (ENOBUFS55);
}
m_cat(m, m_frgpart);
m->m_pkthdr.len = fraglen + hlen + sizeof(*ip6f);
m->m_pkthdr.fibnum = m0->m_pkthdr.fibnum;
m->m_pkthdr.rcvif = NULL((void *)0);
ip6f->ip6f_reserved = 0;
ip6f->ip6f_ident = id;
ip6f->ip6f_nxt = nextproto;
IP6STAT_INC(ip6s_ofragments)counter_u64_add((*(__typeof(vnet_entry_ip6stat)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6stat
))[__builtin_offsetof(struct ip6stat, ip6s_ofragments) / sizeof
(uint64_t)], ((1)));
in6_ifstat_inc(ifp, ifs6_out_fragcreat)do { if (ifp) counter_u64_add(((struct in6_ifextra *) ((ifp)->
if_afdata[28]))->in6_ifstat[ __builtin_offsetof(struct in6_ifstat
, ifs6_out_fragcreat) / sizeof(uint64_t)], 1);} while ( 0);
}

return (0);
266}

268/*
* IP6 output. The packet in mbuf chain m contains a skeletal IP6
* header (with pri, len, nxt, hlim, src, dst).
* This function may modify ver and hlim only.
* The mbuf chain containing the packet will be freed.
* The mbuf opt, if present, will not be freed.
* If route_in6 ro is present and has ro_rt initialized, route lookup would be
* skipped and ro->ro_rt would be used. If ro is present but ro->ro_rt is NULL,
* then result of route lookup is stored in ro->ro_rt.
*
* type of "mtu": rt_mtu is u_long, ifnet.ifr_mtu is int, and
* nd_ifinfo.linkmtu is u_int32_t.  so we use u_long to hold largest one,
* which is rt_mtu.
*
* ifpp - XXX: just for statistics
*/
284/*
* XXX TODO: no flowid is assigned for outbound flows?
*/
287int
288ip6_output(struct mbuf *m0, struct ip6_pktopts *opt,
  struct route_in6 *ro, int flags, struct ip6_moptions *im6o,
  struct ifnet **ifpp, struct inpcb *inp)
291{
struct ip6_hdr *ip6;
struct ifnet *ifp, *origifp;
struct mbuf *m = m0;
struct mbuf *mprev = NULL((void *)0);
int hlen, tlen, len;
struct route_in6 ip6route;
struct rtentry *rt = NULL((void *)0);
struct sockaddr_in6 *dst, src_sa, dst_sa;
struct in6_addr odst;
int error = 0;
struct in6_ifaddr *ia = NULL((void *)0);
u_long mtu;
int alwaysfrag, dontfrag;
u_int32_t optlen = 0, plen = 0, unfragpartlen = 0;
struct ip6_exthdrs exthdrs;
struct in6_addr src0, dst0;
u_int32_t zone;
struct route_in6 *ro_pmtu = NULL((void *)0);
int hdrsplit = 0;
int sw_csum, tso;
int needfiblookup;
uint32_t fibnum;
struct m_tag *fwd_tag = NULL((void *)0);
uint32_t id;

if (inp != NULL((void *)0)) {
INP_LOCK_ASSERT(inp)__rw_assert(&((&(inp)->inp_lock))->rw_lock, (0x00000001
), "/root/freebsd/sys/netinet6/ip6_output.c", 318);
M_SETFIB(m, inp->inp_inc.inc_fibnum)do { do { if (__builtin_expect((!((m)->m_flags & 0x00000002
)), 0)) panic ("Attempt to set FIB on non header mbuf."); } while
 (0); ((m)->m_pkthdr.fibnum) = (inp->inp_inc.inc_fibnum
); } while (0);
if ((flags & IP_NODEFAULTFLOWID0x40) == 0) {
	/* unconditionally set flowid */
	m->m_pkthdr.flowid = inp->inp_flowid;
	M_HASHTYPE_SET(m, inp->inp_flowtype)((m)->m_pkthdr.rsstype = (inp->inp_flowtype));
}
}

327#if defined(IPSEC1) || defined(IPSEC_SUPPORT1)
/*
* IPSec checking which handles several cases.
* FAST IPSEC: We re-injected the packet.
* XXX: need scope argument.
*/
if (IPSEC_ENABLED(ipv6)((ipv6_ipsec_support)->enabled & 0x0001)) {
if ((error = IPSEC_OUTPUT(ipv6, m, inp)(*(ipv6_ipsec_support)->methods->output)(m, inp)) != 0) {
	if (error == EINPROGRESS36)
		error = 0;
	goto done;
}
}
340#endif /* IPSEC */

bzero(&exthdrs, sizeof(exthdrs))__builtin_memset((&exthdrs), 0, (sizeof(exthdrs)));
if (opt) {
/* Hop-by-Hop options header */
MAKE_EXTHDR(opt->ip6po_hbh, &exthdrs.ip6e_hbh)do { if (opt->ip6po_hbh) { struct ip6_ext *eh = (struct ip6_ext
 *)(opt->ip6po_hbh); error = ip6_copyexthdr((&exthdrs.
ip6e_hbh), (caddr_t)(opt->ip6po_hbh), ((eh)->ip6e_len +
 1) << 3); if (error) goto freehdrs; } } while ( 0);
/* Destination options header(1st part) */
if (opt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr) {
	/*
	 * Destination options header(1st part)
	 * This only makes sense with a routing header.
	 * See Section 9.2 of RFC 3542.
	 * Disabling this part just for MIP6 convenience is
	 * a bad idea.  We need to think carefully about a
	 * way to make the advanced API coexist with MIP6
	 * options, which might automatically be inserted in
	 * the kernel.
	 */
	MAKE_EXTHDR(opt->ip6po_dest1, &exthdrs.ip6e_dest1)do { if (opt->ip6po_dest1) { struct ip6_ext *eh = (struct ip6_ext
 *)(opt->ip6po_dest1); error = ip6_copyexthdr((&exthdrs
.ip6e_dest1), (caddr_t)(opt->ip6po_dest1), ((eh)->ip6e_len
 + 1) << 3); if (error) goto freehdrs; } } while ( 0);
}
/* Routing header */
MAKE_EXTHDR(opt->ip6po_rthdr, &exthdrs.ip6e_rthdr)do { if (opt->ip6po_rhinfo.ip6po_rhi_rthdr) { struct ip6_ext
 *eh = (struct ip6_ext *)(opt->ip6po_rhinfo.ip6po_rhi_rthdr
); error = ip6_copyexthdr((&exthdrs.ip6e_rthdr), (caddr_t
)(opt->ip6po_rhinfo.ip6po_rhi_rthdr), ((eh)->ip6e_len +
 1) << 3); if (error) goto freehdrs; } } while ( 0);
/* Destination options header(2nd part) */
MAKE_EXTHDR(opt->ip6po_dest2, &exthdrs.ip6e_dest2)do { if (opt->ip6po_dest2) { struct ip6_ext *eh = (struct ip6_ext
 *)(opt->ip6po_dest2); error = ip6_copyexthdr((&exthdrs
.ip6e_dest2), (caddr_t)(opt->ip6po_dest2), ((eh)->ip6e_len
 + 1) << 3); if (error) goto freehdrs; } } while ( 0);
}

/*
* Calculate the total length of the extension header chain.
* Keep the length of the unfragmentable part for fragmentation.
*/
optlen = 0;
if (exthdrs.ip6e_hbh)
optlen += exthdrs.ip6e_hbh->m_len;
if (exthdrs.ip6e_dest1)
optlen += exthdrs.ip6e_dest1->m_len;
if (exthdrs.ip6e_rthdr)
optlen += exthdrs.ip6e_rthdr->m_len;
unfragpartlen = optlen + sizeof(struct ip6_hdr);

/* NOTE: we don't add AH/ESP length here (done in ip6_ipsec_output) */
if (exthdrs.ip6e_dest2)
optlen += exthdrs.ip6e_dest2->m_len;

/*
* If there is at least one extension header,
* separate IP6 header from the payload.
*/
if (optlen && !hdrsplit) {
if ((error = ip6_splithdr(m, &exthdrs)) != 0) {
	m = NULL((void *)0);
	goto freehdrs;
}
m = exthdrs.ip6e_ip6;
hdrsplit++;
}

ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_data));

/* adjust mbuf packet header length */
m->m_pkthdr.len += optlen;
plen = m->m_pkthdr.len - sizeof(*ip6);

/* If this is a jumbo payload, insert a jumbo payload option. */
if (plen > IPV6_MAXPACKET65535) {
if (!hdrsplit) {
	if ((error = ip6_splithdr(m, &exthdrs)) != 0) {
		m = NULL((void *)0);
		goto freehdrs;
	}
	m = exthdrs.ip6e_ip6;
	hdrsplit++;
}
/* adjust pointer */
ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_data));
if ((error = ip6_insert_jumboopt(&exthdrs, plen)) != 0)
	goto freehdrs;
ip6->ip6_plenip6_ctlun.ip6_un1.ip6_un1_plen = 0;
} else
ip6->ip6_plenip6_ctlun.ip6_un1.ip6_un1_plen = htons(plen)((__uint16_t)(__builtin_constant_p(plen) ? (__uint16_t)(((__uint16_t
)(plen)) << 8 | ((__uint16_t)(plen)) >> 8) : __bswap16_var
(plen)));

/*
* Concatenate headers and fill in next header fields.
* Here we have, on "m"
*	IPv6 payload
* and we insert headers accordingly.  Finally, we should be getting:
*	IPv6 hbh dest1 rthdr ah* [esp* dest2 payload]
*
* during the header composing process, "m" points to IPv6 header.
* "mprev" points to an extension header prior to esp.
*/
u_char *nexthdrp = &ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt;
mprev = m;

/*
* we treat dest2 specially.  this makes IPsec processing
* much easier.  the goal here is to make mprev point the
* mbuf prior to dest2.
*
* result: IPv6 dest2 payload
* m and mprev will point to IPv6 header.
*/
if (exthdrs.ip6e_dest2) {
if (!hdrsplit)
	panic("assumption failed: hdr not split");
exthdrs.ip6e_dest2->m_next = m->m_next;
m->m_next = exthdrs.ip6e_dest2;
*mtod(exthdrs.ip6e_dest2, u_char *)((u_char *)((exthdrs.ip6e_dest2)->m_data)) = ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt;
ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt = IPPROTO_DSTOPTS60;
}

/*
* result: IPv6 hbh dest1 rthdr dest2 payload
* m will point to IPv6 header.  mprev will point to the
* extension header prior to dest2 (rthdr in the above case).
*/
MAKE_CHAIN(exthdrs.ip6e_hbh, mprev, nexthdrp, IPPROTO_HOPOPTS)do { if (exthdrs.ip6e_hbh) { if (!hdrsplit) panic("assumption failed: hdr not split"
); *((u_char *)(((exthdrs.ip6e_hbh))->m_data)) = *(nexthdrp
); *(nexthdrp) = (0); nexthdrp = ((u_char *)(((exthdrs.ip6e_hbh
))->m_data)); (exthdrs.ip6e_hbh)->m_next = (mprev)->
m_next; (mprev)->m_next = (exthdrs.ip6e_hbh); (mprev) = (exthdrs
.ip6e_hbh); } } while ( 0);
MAKE_CHAIN(exthdrs.ip6e_dest1, mprev, nexthdrp,do { if (exthdrs.ip6e_dest1) { if (!hdrsplit) panic("assumption failed: hdr not split"
); *((u_char *)(((exthdrs.ip6e_dest1))->m_data)) = *(nexthdrp
); *(nexthdrp) = (60); nexthdrp = ((u_char *)(((exthdrs.ip6e_dest1
))->m_data)); (exthdrs.ip6e_dest1)->m_next = (mprev)->
m_next; (mprev)->m_next = (exthdrs.ip6e_dest1); (mprev) = (
exthdrs.ip6e_dest1); } } while ( 0)
   IPPROTO_DSTOPTS)do { if (exthdrs.ip6e_dest1) { if (!hdrsplit) panic("assumption failed: hdr not split"
); *((u_char *)(((exthdrs.ip6e_dest1))->m_data)) = *(nexthdrp
); *(nexthdrp) = (60); nexthdrp = ((u_char *)(((exthdrs.ip6e_dest1
))->m_data)); (exthdrs.ip6e_dest1)->m_next = (mprev)->
m_next; (mprev)->m_next = (exthdrs.ip6e_dest1); (mprev) = (
exthdrs.ip6e_dest1); } } while ( 0);
MAKE_CHAIN(exthdrs.ip6e_rthdr, mprev, nexthdrp,do { if (exthdrs.ip6e_rthdr) { if (!hdrsplit) panic("assumption failed: hdr not split"
); *((u_char *)(((exthdrs.ip6e_rthdr))->m_data)) = *(nexthdrp
); *(nexthdrp) = (43); nexthdrp = ((u_char *)(((exthdrs.ip6e_rthdr
))->m_data)); (exthdrs.ip6e_rthdr)->m_next = (mprev)->
m_next; (mprev)->m_next = (exthdrs.ip6e_rthdr); (mprev) = (
exthdrs.ip6e_rthdr); } } while ( 0)
   IPPROTO_ROUTING)do { if (exthdrs.ip6e_rthdr) { if (!hdrsplit) panic("assumption failed: hdr not split"
); *((u_char *)(((exthdrs.ip6e_rthdr))->m_data)) = *(nexthdrp
); *(nexthdrp) = (43); nexthdrp = ((u_char *)(((exthdrs.ip6e_rthdr
))->m_data)); (exthdrs.ip6e_rthdr)->m_next = (mprev)->
m_next; (mprev)->m_next = (exthdrs.ip6e_rthdr); (mprev) = (
exthdrs.ip6e_rthdr); } } while ( 0);

/*
* If there is a routing header, discard the packet.
*/
if (exthdrs.ip6e_rthdr) {
 error = EINVAL22;
 goto bad;
}

/* Source address validation */
if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)((&ip6->ip6_src)->__u6_addr.__u6_addr32[0] == 0 &&
 (&ip6->ip6_src)->__u6_addr.__u6_addr32[1] == 0 &&
 (&ip6->ip6_src)->__u6_addr.__u6_addr32[2] == 0 &&
 (&ip6->ip6_src)->__u6_addr.__u6_addr32[3] == 0) &&
   (flags & IPV6_UNSPECSRC0x01) == 0) {
error = EOPNOTSUPP45;
IP6STAT_INC(ip6s_badscope)counter_u64_add((*(__typeof(vnet_entry_ip6stat)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6stat
))[__builtin_offsetof(struct ip6stat, ip6s_badscope) / sizeof
(uint64_t)], ((1)));
goto bad;
}
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src)((&ip6->ip6_src)->__u6_addr.__u6_addr8[0] == 0xff)) {
error = EOPNOTSUPP45;
IP6STAT_INC(ip6s_badscope)counter_u64_add((*(__typeof(vnet_entry_ip6stat)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6stat
))[__builtin_offsetof(struct ip6stat, ip6s_badscope) / sizeof
(uint64_t)], ((1)));
goto bad;
}

IP6STAT_INC(ip6s_localout)counter_u64_add((*(__typeof(vnet_entry_ip6stat)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6stat
))[__builtin_offsetof(struct ip6stat, ip6s_localout) / sizeof
(uint64_t)], ((1)));

/*
* Route packet.
*/
if (ro == NULL((void *)0)) {
ro = &ip6route;
bzero((caddr_t)ro, sizeof(*ro))__builtin_memset(((caddr_t)ro), 0, (sizeof(*ro)));
}
ro_pmtu = ro;
if (opt && opt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr)
ro = &opt->ip6po_routeip6po_rhinfo.ip6po_rhi_route;
dst = (struct sockaddr_in6 *)&ro->ro_dst;
fibnum = (inp != NULL((void *)0)) ? inp->inp_inc.inc_fibnum : M_GETFIB(m)rt_m_getfib(m);
496again:
/*
* if specified, try to fill in the traffic class field.
* do not override if a non-zero value is already set.
* we check the diffserv field and the ecn field separately.
*/
if (opt && opt->ip6po_tclass >= 0) {
int mask = 0;

if ((ip6->ip6_flowip6_ctlun.ip6_un1.ip6_un1_flow & htonl(0xfc << 20)(__builtin_constant_p(0xfc << 20) ? (((__uint32_t)((__uint16_t
)(__builtin_constant_p(((__uint32_t)(0xfc << 20)) &
 0xffff) ? (__uint16_t)(((__uint16_t)(((__uint32_t)(0xfc <<
 20)) & 0xffff)) << 8 | ((__uint16_t)(((__uint32_t)
(0xfc << 20)) & 0xffff)) >> 8) : __bswap16_var
(((__uint32_t)(0xfc << 20)) & 0xffff))) << 16
) | ((__uint16_t)(__builtin_constant_p(((__uint32_t)(0xfc <<
 20)) >> 16) ? (__uint16_t)(((__uint16_t)(((__uint32_t)
(0xfc << 20)) >> 16)) << 8 | ((__uint16_t)(
((__uint32_t)(0xfc << 20)) >> 16)) >> 8) : __bswap16_var
(((__uint32_t)(0xfc << 20)) >> 16)))) : __bswap32_var
(0xfc << 20))) == 0)
	mask |= 0xfc;
if ((ip6->ip6_flowip6_ctlun.ip6_un1.ip6_un1_flow & htonl(0x03 << 20)(__builtin_constant_p(0x03 << 20) ? (((__uint32_t)((__uint16_t
)(__builtin_constant_p(((__uint32_t)(0x03 << 20)) &
 0xffff) ? (__uint16_t)(((__uint16_t)(((__uint32_t)(0x03 <<
 20)) & 0xffff)) << 8 | ((__uint16_t)(((__uint32_t)
(0x03 << 20)) & 0xffff)) >> 8) : __bswap16_var
(((__uint32_t)(0x03 << 20)) & 0xffff))) << 16
) | ((__uint16_t)(__builtin_constant_p(((__uint32_t)(0x03 <<
 20)) >> 16) ? (__uint16_t)(((__uint16_t)(((__uint32_t)
(0x03 << 20)) >> 16)) << 8 | ((__uint16_t)(
((__uint32_t)(0x03 << 20)) >> 16)) >> 8) : __bswap16_var
(((__uint32_t)(0x03 << 20)) >> 16)))) : __bswap32_var
(0x03 << 20))) == 0)
	mask |= 0x03;
if (mask != 0)
	ip6->ip6_flowip6_ctlun.ip6_un1.ip6_un1_flow |= htonl((opt->ip6po_tclass & mask) << 20)(__builtin_constant_p((opt->ip6po_tclass & mask) <<
 20) ? (((__uint32_t)((__uint16_t)(__builtin_constant_p(((__uint32_t
)((opt->ip6po_tclass & mask) << 20)) & 0xffff
) ? (__uint16_t)(((__uint16_t)(((__uint32_t)((opt->ip6po_tclass
 & mask) << 20)) & 0xffff)) << 8 | ((__uint16_t
)(((__uint32_t)((opt->ip6po_tclass & mask) << 20
)) & 0xffff)) >> 8) : __bswap16_var(((__uint32_t)((
opt->ip6po_tclass & mask) << 20)) & 0xffff))
) << 16) | ((__uint16_t)(__builtin_constant_p(((__uint32_t
)((opt->ip6po_tclass & mask) << 20)) >> 16
) ? (__uint16_t)(((__uint16_t)(((__uint32_t)((opt->ip6po_tclass
 & mask) << 20)) >> 16)) << 8 | ((__uint16_t
)(((__uint32_t)((opt->ip6po_tclass & mask) << 20
)) >> 16)) >> 8) : __bswap16_var(((__uint32_t)((opt
->ip6po_tclass & mask) << 20)) >> 16)))) :
 __bswap32_var((opt->ip6po_tclass & mask) << 20)
);
}

/* fill in or override the hop limit field, if necessary. */
if (opt && opt->ip6po_hlim != -1)
ip6->ip6_hlimip6_ctlun.ip6_un1.ip6_un1_hlim = opt->ip6po_hlim & 0xff;
else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff)) {
if (im6o != NULL((void *)0))
	ip6->ip6_hlimip6_ctlun.ip6_un1.ip6_un1_hlim = im6o->im6o_multicast_hlim;
else
	ip6->ip6_hlimip6_ctlun.ip6_un1.ip6_un1_hlim = V_ip6_defmcasthlim(*(__typeof(vnet_entry_ip6_defmcasthlim)*) (((((__curthread()
)->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6_defmcasthlim
));
}
/*
* Validate route against routing table additions;
* a better/more specific route might have been added.
* Make sure address family is set in route.
*/
if (inp) {
ro->ro_dst.sin6_family = AF_INET628;
RT_VALIDATE((struct route *)ro, &inp->inp_rt_cookie, fibnum)do { rt_gen_t cookie = rt_tables_get_gen(fibnum, ((struct route
 *)ro)->ro_dst.sa_family); if (*(&inp->inp_rt_cookie
) != cookie) { do { do { if (((struct route *)ro)->ro_rt) do
 { __mtx_lock_flags(&((((&(((struct route *)ro)->ro_rt
)->rt_mtx))))->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (529)); do { if ((((struct route *)ro)->ro_rt)->rt_refcnt
 <= 1) rtfree(((struct route *)ro)->ro_rt); else { do {
 __mtx_assert(&(((&(((struct route *)ro)->ro_rt)->
rt_mtx)))->mtx_lock, ((0x00000004)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (529)); do { if (__builtin_expect((!((((struct route *)ro)
->ro_rt)->rt_refcnt > 0)), 0)) panic ("bogus refcnt %d"
, (((struct route *)ro)->ro_rt)->rt_refcnt); } while (0
); (((struct route *)ro)->ro_rt)->rt_refcnt--; } while (
0); __mtx_unlock_flags(&((((&(((struct route *)ro)->
ro_rt)->rt_mtx))))->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (529)); } ((struct route *)ro)->ro_rt = 0; } while (0);
 } while (0); } while (0); if (((struct route *)ro)->ro_lle
 != ((void *)0)) { do { _rw_wlock_cookie(&((&(((struct
 route *)ro)->ro_lle)->lle_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 529); do { if ((((struct route *)ro)->ro_lle)->lle_refcnt
 == 1) (((struct route *)ro)->ro_lle)->lle_free(((struct
 route *)ro)->ro_lle); else { do { __rw_assert(&((&
(((struct route *)ro)->ro_lle)->lle_lock))->rw_lock,
 (0x00000004), "/root/freebsd/sys/netinet6/ip6_output.c", 529
); do { if (__builtin_expect((!((((struct route *)ro)->ro_lle
)->lle_refcnt > 0)), 0)) panic ("bogus refcnt %d on lle %p"
, (((struct route *)ro)->ro_lle)->lle_refcnt, (((struct
 route *)ro)->ro_lle)); } while (0); (((struct route *)ro)
->ro_lle)->lle_refcnt--; } while (0); _rw_wunlock_cookie
(&((&(((struct route *)ro)->ro_lle)->lle_lock))
->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 529)
; } (((struct route *)ro)->ro_lle) = ((void *)0); } while (
0); } while (0); ((struct route *)ro)->ro_lle = ((void *)0
); } } while (0); *(&inp->inp_rt_cookie) = cookie; } }
 while (0);
}
if (ro->ro_rt && fwd_tag == NULL((void *)0) && (ro->ro_rt->rt_flags & RTF_UP0x1) &&
   ro->ro_dst.sin6_family == AF_INET628 &&
   IN6_ARE_ADDR_EQUAL(&ro->ro_dst.sin6_addr, &ip6->ip6_dst)(__builtin_memcmp((&(&ro->ro_dst.sin6_addr)->__u6_addr
.__u6_addr8[0]), (&(&ip6->ip6_dst)->__u6_addr.__u6_addr8
[0]), (sizeof(struct in6_addr))) == 0)) {
rt = ro->ro_rt;
ifp = ro->ro_rt->rt_ifp;
} else {
if (ro->ro_lle)
	LLE_FREE(ro->ro_lle)do { _rw_wlock_cookie(&((&(ro->ro_lle)->lle_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 538
); do { if ((ro->ro_lle)->lle_refcnt == 1) (ro->ro_lle
)->lle_free(ro->ro_lle); else { do { __rw_assert(&(
(&(ro->ro_lle)->lle_lock))->rw_lock, (0x00000004
), "/root/freebsd/sys/netinet6/ip6_output.c", 538); do { if (
__builtin_expect((!((ro->ro_lle)->lle_refcnt > 0)), 0
)) panic ("bogus refcnt %d on lle %p", (ro->ro_lle)->lle_refcnt
, (ro->ro_lle)); } while (0); (ro->ro_lle)->lle_refcnt
--; } while (0); _rw_wunlock_cookie(&((&(ro->ro_lle
)->lle_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 538); } (ro->ro_lle) = ((void *)0); } while (0); } while
 (0);	/* zeros ro_lle */
ro->ro_lle = NULL((void *)0);
if (fwd_tag == NULL((void *)0)) {
	bzero(&dst_sa, sizeof(dst_sa))__builtin_memset((&dst_sa), 0, (sizeof(dst_sa)));
	dst_sa.sin6_family = AF_INET628;
	dst_sa.sin6_len = sizeof(dst_sa);
	dst_sa.sin6_addr = ip6->ip6_dst;
}
error = in6_selectroute_fib(&dst_sa, opt, im6o, ro, &ifp,
    &rt, fibnum);
if (error != 0) {
	if (ifp != NULL((void *)0))
		in6_ifstat_inc(ifp, ifs6_out_discard)do { if (ifp) counter_u64_add(((struct in6_ifextra *) ((ifp)->
if_afdata[28]))->in6_ifstat[ __builtin_offsetof(struct in6_ifstat
, ifs6_out_discard) / sizeof(uint64_t)], 1);} while ( 0);
	goto bad;
}
}
if (rt == NULL((void *)0)) {
/*
 * If in6_selectroute() does not return a route entry,
 * dst may not have been updated.
 */
*dst = dst_sa;	/* XXX */
}

/*
* then rt (for unicast) and ifp must be non-NULL valid values.
*/
if ((flags & IPV6_FORWARDING0x02) == 0) {
/* XXX: the FORWARDING flag can be set for mrouting. */
in6_ifstat_inc(ifp, ifs6_out_request)do { if (ifp) counter_u64_add(((struct in6_ifextra *) ((ifp)->
if_afdata[28]))->in6_ifstat[ __builtin_offsetof(struct in6_ifstat
, ifs6_out_request) / sizeof(uint64_t)], 1);} while ( 0);
}
if (rt != NULL((void *)0)) {
ia = (struct in6_ifaddr *)(rt->rt_ifa);
counter_u64_add(rt->rt_pksent, 1);
}


/*
* The outgoing interface must be in the zone of source and
* destination addresses.
*/
origifp = ifp;

src0 = ip6->ip6_src;
if (in6_setscope(&src0, origifp, &zone))
goto badscope;
bzero(&src_sa, sizeof(src_sa))__builtin_memset((&src_sa), 0, (sizeof(src_sa)));
src_sa.sin6_family = AF_INET628;
src_sa.sin6_len = sizeof(src_sa);
src_sa.sin6_addr = ip6->ip6_src;
if (sa6_recoverscope(&src_sa) || zone != src_sa.sin6_scope_id)
goto badscope;

dst0 = ip6->ip6_dst;
if (in6_setscope(&dst0, origifp, &zone))
goto badscope;
/* re-initialize to be sure */
bzero(&dst_sa, sizeof(dst_sa))__builtin_memset((&dst_sa), 0, (sizeof(dst_sa)));
dst_sa.sin6_family = AF_INET628;
dst_sa.sin6_len = sizeof(dst_sa);
dst_sa.sin6_addr = ip6->ip6_dst;
if (sa6_recoverscope(&dst_sa) || zone != dst_sa.sin6_scope_id) {
goto badscope;
}

/* We should use ia_ifp to support the case of
* sending packets to an address of our own.
*/
if (ia != NULL((void *)0) && ia->ia_ifpia_ifa.ifa_ifp)
ifp = ia->ia_ifpia_ifa.ifa_ifp;

/* scope check is done. */
goto routefound;

badscope:
IP6STAT_INC(ip6s_badscope)counter_u64_add((*(__typeof(vnet_entry_ip6stat)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6stat
))[__builtin_offsetof(struct ip6stat, ip6s_badscope) / sizeof
(uint64_t)], ((1)));
in6_ifstat_inc(origifp, ifs6_out_discard)do { if (origifp) counter_u64_add(((struct in6_ifextra *) ((origifp
)->if_afdata[28]))->in6_ifstat[ __builtin_offsetof(struct
 in6_ifstat, ifs6_out_discard) / sizeof(uint64_t)], 1);} while
 ( 0);
if (error == 0)
error = EHOSTUNREACH65; /* XXX */
goto bad;

routefound:
if (rt && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff)) {
if (opt && opt->ip6po_nextrouteip6po_nhinfo.ip6po_nhi_route.ro_rt) {
	/*
	 * The nexthop is explicitly specified by the
	 * application.  We assume the next hop is an IPv6
	 * address.
	 */
	dst = (struct sockaddr_in6 *)opt->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop;
}
else if ((rt->rt_flags & RTF_GATEWAY0x2))
	dst = (struct sockaddr_in6 *)rt->rt_gateway;
}

if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff)) {
m->m_flags &= ~(M_BCAST0x00000010 | M_MCAST0x00000020); /* just in case */
} else {
m->m_flags = (m->m_flags & ~M_BCAST0x00000010) | M_MCAST0x00000020;
in6_ifstat_inc(ifp, ifs6_out_mcast)do { if (ifp) counter_u64_add(((struct in6_ifextra *) ((ifp)->
if_afdata[28]))->in6_ifstat[ __builtin_offsetof(struct in6_ifstat
, ifs6_out_mcast) / sizeof(uint64_t)], 1);} while ( 0);
/*
 * Confirm that the outgoing interface supports multicast.
 */
if (!(ifp->if_flags & IFF_MULTICAST0x8000)) {
	IP6STAT_INC(ip6s_noroute)counter_u64_add((*(__typeof(vnet_entry_ip6stat)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6stat
))[__builtin_offsetof(struct ip6stat, ip6s_noroute) / sizeof(
uint64_t)], ((1)));
	in6_ifstat_inc(ifp, ifs6_out_discard)do { if (ifp) counter_u64_add(((struct in6_ifextra *) ((ifp)->
if_afdata[28]))->in6_ifstat[ __builtin_offsetof(struct in6_ifstat
, ifs6_out_discard) / sizeof(uint64_t)], 1);} while ( 0);
	error = ENETUNREACH51;
	goto bad;
}
if ((im6o == NULL((void *)0) && in6_mcast_loop) ||
    (im6o && im6o->im6o_multicast_loop)) {
	/*
	 * Loop back multicast datagram if not expressly
	 * forbidden to do so, even if we have not joined
	 * the address; protocols will filter it later,
	 * thus deferring a hash lookup and lock acquisition
	 * at the expense of an m_copym().
	 */
	ip6_mloopback(ifp, m);
} else {
	/*
	 * If we are acting as a multicast router, perform
	 * multicast forwarding as if the packet had just
	 * arrived on the interface to which we are about
	 * to send.  The multicast forwarding function
	 * recursively calls this function, using the
	 * IPV6_FORWARDING flag to prevent infinite recursion.
	 *
	 * Multicasts that are looped back by ip6_mloopback(),
	 * above, will be forwarded by the ip6_input() routine,
	 * if necessary.
	 */
	if (V_ip6_mrouter(*(__typeof(vnet_entry_ip6_mrouter)*) (((((__curthread())->
td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6_mrouter
)) && (flags & IPV6_FORWARDING0x02) == 0) {
		/*
		 * XXX: ip6_mforward expects that rcvif is NULL
		 * when it is called from the originating path.
		 * However, it may not always be the case.
		 */
		m->m_pkthdr.rcvif = NULL((void *)0);
		if (ip6_mforward(ip6, ifp, m) != 0) {
			m_freem(m);
			goto done;
		}
	}
}
/*
 * Multicasts with a hoplimit of zero may be looped back,
 * above, but must not be transmitted on a network.
 * Also, multicasts addressed to the loopback interface
 * are not sent -- the above call to ip6_mloopback() will
 * loop back a copy if this host actually belongs to the
 * destination group on the loopback interface.
 */
if (ip6->ip6_hlimip6_ctlun.ip6_un1.ip6_un1_hlim == 0 || (ifp->if_flags & IFF_LOOPBACK0x8) ||
    IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst)(((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff)
 && (((&ip6->ip6_dst)->__u6_addr.__u6_addr8
[1] & 0x0f) == 0x01))) {
	m_freem(m);
	goto done;
}
}

/*
* Fill the outgoing inteface to tell the upper layer
* to increment per-interface statistics.
*/
if (ifpp)
*ifpp = ifp;

/* Determine path MTU. */
if ((error = ip6_getpmtu(ro_pmtu, ro != ro_pmtu, ifp, &ip6->ip6_dst,
    &mtu, &alwaysfrag, fibnum, *nexthdrp)) != 0)
goto bad;

/*
* The caller of this function may specify to use the minimum MTU
* in some cases.
* An advanced API option (IPV6_USE_MIN_MTU) can also override MTU
* setting.  The logic is a bit complicated; by default, unicast
* packets will follow path MTU while multicast packets will be sent at
* the minimum MTU.  If IP6PO_MINMTU_ALL is specified, all packets
* including unicast ones will be sent at the minimum MTU.  Multicast
* packets will always be sent at the minimum MTU unless
* IP6PO_MINMTU_DISABLE is explicitly specified.
* See RFC 3542 for more details.
*/
if (mtu > IPV6_MMTU1280) {
if ((flags & IPV6_MINMTU0x04))
	mtu = IPV6_MMTU1280;
else if (opt && opt->ip6po_minmtu == IP6PO_MINMTU_ALL1)
	mtu = IPV6_MMTU1280;
else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff) &&
	 (opt == NULL((void *)0) ||
	  opt->ip6po_minmtu != IP6PO_MINMTU_DISABLE0)) {
	mtu = IPV6_MMTU1280;
}
}

/*
* clear embedded scope identifiers if necessary.
* in6_clearscope will touch the addresses only when necessary.
*/
in6_clearscope(&ip6->ip6_src);
in6_clearscope(&ip6->ip6_dst);

/*
* If the outgoing packet contains a hop-by-hop options header,
* it must be examined and processed even by the source node.
* (RFC 2460, section 4.)
*/
if (exthdrs.ip6e_hbh) {
struct ip6_hbh *hbh = mtod(exthdrs.ip6e_hbh, struct ip6_hbh *)((struct ip6_hbh *)((exthdrs.ip6e_hbh)->m_data));
u_int32_t dummy; /* XXX unused */
u_int32_t plen = 0; /* XXX: ip6_process will check the value */

751#ifdef DIAGNOSTIC
if ((hbh->ip6h_len + 1) << 3 > exthdrs.ip6e_hbh->m_len)
	panic("ip6e_hbh is not contiguous");
754#endif
/*
 *  XXX: if we have to send an ICMPv6 error to the sender,
 *       we need the M_LOOP flag since icmp6_error() expects
 *       the IPv6 and the hop-by-hop options header are
 *       contiguous unless the flag is set.
 */
m->m_flags |= M_LOOP0x00020000;
m->m_pkthdr.rcvif = ifp;
if (ip6_process_hopopts(m, (u_int8_t *)(hbh + 1),
    ((hbh->ip6h_len + 1) << 3) - sizeof(struct ip6_hbh),
    &dummy, &plen) < 0) {
	/* m was already freed at this point */
	error = EINVAL22;/* better error? */
	goto done;
}
m->m_flags &= ~M_LOOP0x00020000; /* XXX */
m->m_pkthdr.rcvif = NULL((void *)0);
}

/* Jump over all PFIL processing if hooks are not active. */
if (!PFIL_HOOKED(&V_inet6_pfil_hook)((&(*(__typeof(vnet_entry_inet6_pfil_hook)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_inet6_pfil_hook
)))->ph_nhooks > 0))
goto passout;

odst = ip6->ip6_dst;
/* Run through list of hooks for output packets. */
error = pfil_run_hooks(&V_inet6_pfil_hook(*(__typeof(vnet_entry_inet6_pfil_hook)*) (((((__curthread())
->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_inet6_pfil_hook
)), &m, ifp, PFIL_OUT0x00000002, 0, inp);
if (error != 0 || m == NULL((void *)0))
goto done;
/* adjust pointer */
ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_data));

needfiblookup = 0;
/* See if destination IP address was changed by packet filter. */
if (!IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst)(__builtin_memcmp((&(&odst)->__u6_addr.__u6_addr8[
0]), (&(&ip6->ip6_dst)->__u6_addr.__u6_addr8[0]
), (sizeof(struct in6_addr))) == 0)) {
m->m_flags |= M_SKIP_FIREWALL0x00004000;
/* If destination is now ourself drop to ip6_input(). */
if (in6_localip(&ip6->ip6_dst)) {
	m->m_flags |= M_FASTFWD_OURS0x00001000;
	if (m->m_pkthdr.rcvif == NULL((void *)0))
		m->m_pkthdr.rcvif = V_loif(*(__typeof(vnet_entry_loif)*) (((((__curthread())->td_vnet
))->vnet_data_base) + (uintptr_t)&vnet_entry_loif));
	if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA_IPV6(0x00000400|0x00000200)) {
		m->m_pkthdr.csum_flags |=
		    CSUM_DATA_VALID_IPV60x08000000 | CSUM_PSEUDO_HDR0x04000000;
		m->m_pkthdr.csum_dataPH_per.thirtytwo[1] = 0xffff;
	}
800#ifdef SCTP1
	if (m->m_pkthdr.csum_flags & CSUM_SCTP_IPV60x00000800)
		m->m_pkthdr.csum_flags |= CSUM_SCTP_VALID0x08000000;
803#endif
	error = netisr_queue(NETISR_IPV66, m);
	goto done;
} else {
	RO_INVALIDATE_CACHE(ro)do { do { if ((ro)->ro_rt) do { __mtx_lock_flags(&((((
&((ro)->ro_rt)->rt_mtx))))->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (807)); do { if (((ro)->ro_rt)->rt_refcnt <= 1) rtfree
((ro)->ro_rt); else { do { __mtx_assert(&(((&((ro)
->ro_rt)->rt_mtx)))->mtx_lock, ((0x00000004)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (807)); do { if (__builtin_expect((!(((ro)->ro_rt)->
rt_refcnt > 0)), 0)) panic ("bogus refcnt %d", ((ro)->ro_rt
)->rt_refcnt); } while (0); ((ro)->ro_rt)->rt_refcnt
--; } while (0); __mtx_unlock_flags(&((((&((ro)->ro_rt
)->rt_mtx))))->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (807)); } (ro)->ro_rt = 0; } while (0); } while (0); } while
 (0); if ((ro)->ro_lle != ((void *)0)) { do { _rw_wlock_cookie
(&((&((ro)->ro_lle)->lle_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 807); do { if (((ro)->ro_lle)->lle_refcnt == 1) ((ro)
->ro_lle)->lle_free((ro)->ro_lle); else { do { __rw_assert
(&((&((ro)->ro_lle)->lle_lock))->rw_lock, (0x00000004
), "/root/freebsd/sys/netinet6/ip6_output.c", 807); do { if (
__builtin_expect((!(((ro)->ro_lle)->lle_refcnt > 0))
, 0)) panic ("bogus refcnt %d on lle %p", ((ro)->ro_lle)->
lle_refcnt, ((ro)->ro_lle)); } while (0); ((ro)->ro_lle
)->lle_refcnt--; } while (0); _rw_wunlock_cookie(&((&
((ro)->ro_lle)->lle_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 807); } ((ro)->ro_lle) = ((void *)0); } while (0); } while
 (0); (ro)->ro_lle = ((void *)0); } } while (0);
	needfiblookup = 1; /* Redo the routing table lookup. */
}
}
/* See if fib was changed by packet filter. */
if (fibnum != M_GETFIB(m)rt_m_getfib(m)) {
m->m_flags |= M_SKIP_FIREWALL0x00004000;
fibnum = M_GETFIB(m)rt_m_getfib(m);
RO_INVALIDATE_CACHE(ro)do { do { if ((ro)->ro_rt) do { __mtx_lock_flags(&((((
&((ro)->ro_rt)->rt_mtx))))->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (815)); do { if (((ro)->ro_rt)->rt_refcnt <= 1) rtfree
((ro)->ro_rt); else { do { __mtx_assert(&(((&((ro)
->ro_rt)->rt_mtx)))->mtx_lock, ((0x00000004)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (815)); do { if (__builtin_expect((!(((ro)->ro_rt)->
rt_refcnt > 0)), 0)) panic ("bogus refcnt %d", ((ro)->ro_rt
)->rt_refcnt); } while (0); ((ro)->ro_rt)->rt_refcnt
--; } while (0); __mtx_unlock_flags(&((((&((ro)->ro_rt
)->rt_mtx))))->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (815)); } (ro)->ro_rt = 0; } while (0); } while (0); } while
 (0); if ((ro)->ro_lle != ((void *)0)) { do { _rw_wlock_cookie
(&((&((ro)->ro_lle)->lle_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 815); do { if (((ro)->ro_lle)->lle_refcnt == 1) ((ro)
->ro_lle)->lle_free((ro)->ro_lle); else { do { __rw_assert
(&((&((ro)->ro_lle)->lle_lock))->rw_lock, (0x00000004
), "/root/freebsd/sys/netinet6/ip6_output.c", 815); do { if (
__builtin_expect((!(((ro)->ro_lle)->lle_refcnt > 0))
, 0)) panic ("bogus refcnt %d on lle %p", ((ro)->ro_lle)->
lle_refcnt, ((ro)->ro_lle)); } while (0); ((ro)->ro_lle
)->lle_refcnt--; } while (0); _rw_wunlock_cookie(&((&
((ro)->ro_lle)->lle_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 815); } ((ro)->ro_lle) = ((void *)0); } while (0); } while
 (0); (ro)->ro_lle = ((void *)0); } } while (0);
needfiblookup = 1;
}
if (needfiblookup)
goto again;

/* See if local, if yes, send it to netisr. */
if (m->m_flags & M_FASTFWD_OURS0x00001000) {
if (m->m_pkthdr.rcvif == NULL((void *)0))
	m->m_pkthdr.rcvif = V_loif(*(__typeof(vnet_entry_loif)*) (((((__curthread())->td_vnet
))->vnet_data_base) + (uintptr_t)&vnet_entry_loif));
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA_IPV6(0x00000400|0x00000200)) {
	m->m_pkthdr.csum_flags |=
	    CSUM_DATA_VALID_IPV60x08000000 | CSUM_PSEUDO_HDR0x04000000;
	m->m_pkthdr.csum_dataPH_per.thirtytwo[1] = 0xffff;
}
830#ifdef SCTP1
if (m->m_pkthdr.csum_flags & CSUM_SCTP_IPV60x00000800)
	m->m_pkthdr.csum_flags |= CSUM_SCTP_VALID0x08000000;
833#endif
error = netisr_queue(NETISR_IPV66, m);
goto done;
}
/* Or forward to some other address? */
if ((m->m_flags & M_IP6_NEXTHOP0x00002000) &&
   (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD18, NULL((void *)0))) != NULL((void *)0)) {
dst = (struct sockaddr_in6 *)&ro->ro_dst;
bcopy((fwd_tag+1), &dst_sa, sizeof(struct sockaddr_in6))__builtin_memmove((&dst_sa), ((fwd_tag+1)), (sizeof(struct
 sockaddr_in6)));
m->m_flags |= M_SKIP_FIREWALL0x00004000;
m->m_flags &= ~M_IP6_NEXTHOP0x00002000;
m_tag_delete(m, fwd_tag);
goto again;
}

848passout:
/*
* Send the packet to the outgoing interface.
* If necessary, do IPv6 fragmentation before sending.
*
* the logic here is rather complex:
* 1: normal case (dontfrag == 0, alwaysfrag == 0)
* 1-a:	send as is if tlen <= path mtu
* 1-b:	fragment if tlen > path mtu
*
* 2: if user asks us not to fragment (dontfrag == 1)
* 2-a:	send as is if tlen <= interface mtu
* 2-b:	error if tlen > interface mtu
*
* 3: if we always need to attach fragment header (alwaysfrag == 1)
*	always fragment
*
* 4: if dontfrag == 1 && alwaysfrag == 1
*	error, as we cannot handle this conflicting request
*/
sw_csum = m->m_pkthdr.csum_flags;
if (!hdrsplit) {
tso = ((sw_csum & ifp->if_hwassist & CSUM_TSO(0x00000010|0x00001000)) != 0) ? 1 : 0;
sw_csum &= ~ifp->if_hwassist;
} else
tso = 0;
/*
* If we added extension headers, we will not do TSO and calculate the
* checksums ourselves for now.
* XXX-BZ  Need a framework to know when the NIC can handle it, even
* with ext. hdrs.
*/
if (sw_csum & CSUM_DELAY_DATA_IPV6(0x00000400|0x00000200)) {
sw_csum &= ~CSUM_DELAY_DATA_IPV6(0x00000400|0x00000200);
in6_delayed_cksum(m, plen, sizeof(struct ip6_hdr));
}
884#ifdef SCTP1
if (sw_csum & CSUM_SCTP_IPV60x00000800) {
sw_csum &= ~CSUM_SCTP_IPV60x00000800;
sctp_delayed_cksum(m, sizeof(struct ip6_hdr));
}
889#endif
m->m_pkthdr.csum_flags &= ifp->if_hwassist;
tlen = m->m_pkthdr.len;

if ((opt && (opt->ip6po_flags & IP6PO_DONTFRAG0x04)) || tso)
dontfrag = 1;
else
dontfrag = 0;
if (dontfrag && alwaysfrag) {	/* case 4 */
/* conflicting request - can't transmit */
error = EMSGSIZE40;
goto bad;
}
if (dontfrag && tlen > IN6_LINKMTU(ifp)(((((struct in6_ifextra *)(ifp)->if_afdata[28])->nd_ifinfo
)->linkmtu && (((struct in6_ifextra *)(ifp)->if_afdata
[28])->nd_ifinfo)->linkmtu < (ifp)->if_mtu) ? (((
struct in6_ifextra *)(ifp)->if_afdata[28])->nd_ifinfo)->
linkmtu : (((((struct in6_ifextra *)(ifp)->if_afdata[28])->
nd_ifinfo)->maxmtu && (((struct in6_ifextra *)(ifp
)->if_afdata[28])->nd_ifinfo)->maxmtu < (ifp)->
if_mtu) ? (((struct in6_ifextra *)(ifp)->if_afdata[28])->
nd_ifinfo)->maxmtu : (ifp)->if_mtu)) && !tso) {	/* case 2-b */
/*
 * Even if the DONTFRAG option is specified, we cannot send the
 * packet when the data length is larger than the MTU of the
 * outgoing interface.
 * Notify the error by sending IPV6_PATHMTU ancillary data if
 * application wanted to know the MTU value. Also return an
 * error code (this is not described in the API spec).
 */
if (inp != NULL((void *)0))
	ip6_notify_pmtu(inp, &dst_sa, (u_int32_t)mtu);
error = EMSGSIZE40;
goto bad;
}

/*
* transmit packet without fragmentation
*/
if (dontfrag || (!alwaysfrag && tlen <= mtu)) {	/* case 1-a and 2-a */
struct in6_ifaddr *ia6;

ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_data));
ia6 = in6_ifawithifp(ifp, &ip6->ip6_src);
if (ia6) {
	/* Record statistics for this interface address. */
	counter_u64_add(ia6->ia_ifa.ifa_opackets, 1);
	counter_u64_add(ia6->ia_ifa.ifa_obytes,
	    m->m_pkthdr.len);
	ifa_free(&ia6->ia_ifa);
}
932#ifdef RATELIMIT
if (inp != NULL((void *)0)) {
	if (inp->inp_flags2 & INP_RATE_LIMIT_CHANGED0x00000400)
		in_pcboutput_txrtlmt(inp, ifp, m);
	/* stamp send tag on mbuf */
	m->m_pkthdr.snd_tag = inp->inp_snd_tag;
} else {
	m->m_pkthdr.snd_tag = NULL((void *)0);
}
941#endif
error = nd6_output_ifp(ifp, origifp, m, dst,
    (struct route *)ro);
944#ifdef RATELIMIT
/* check for route change */
if (error == EAGAIN35)
	in_pcboutput_eagain(inp);
948#endif
goto done;
}

/*
* try to fragment the packet.  case 1-b and 3
*/
if (mtu < IPV6_MMTU1280) {
/* path MTU cannot be less than IPV6_MMTU */
error = EMSGSIZE40;
in6_ifstat_inc(ifp, ifs6_out_fragfail)do { if (ifp) counter_u64_add(((struct in6_ifextra *) ((ifp)->
if_afdata[28]))->in6_ifstat[ __builtin_offsetof(struct in6_ifstat
, ifs6_out_fragfail) / sizeof(uint64_t)], 1);} while ( 0);
goto bad;
} else if (ip6->ip6_plenip6_ctlun.ip6_un1.ip6_un1_plen == 0) {
/* jumbo payload cannot be fragmented */
error = EMSGSIZE40;
in6_ifstat_inc(ifp, ifs6_out_fragfail)do { if (ifp) counter_u64_add(((struct in6_ifextra *) ((ifp)->
if_afdata[28]))->in6_ifstat[ __builtin_offsetof(struct in6_ifstat
, ifs6_out_fragfail) / sizeof(uint64_t)], 1);} while ( 0);
goto bad;
} else {
u_char nextproto;

/*
 * Too large for the destination or interface;
 * fragment if possible.
 * Must be able to put at least 8 bytes per fragment.
 */
hlen = unfragpartlen;
if (mtu > IPV6_MAXPACKET65535)
	mtu = IPV6_MAXPACKET65535;

len = (mtu - hlen - sizeof(struct ip6_frag)) & ~7;
if (len < 8) {
	error = EMSGSIZE40;
	in6_ifstat_inc(ifp, ifs6_out_fragfail)do { if (ifp) counter_u64_add(((struct in6_ifextra *) ((ifp)->
if_afdata[28]))->in6_ifstat[ __builtin_offsetof(struct in6_ifstat
, ifs6_out_fragfail) / sizeof(uint64_t)], 1);} while ( 0);
	goto bad;
}

/*
 * If the interface will not calculate checksums on
 * fragmented packets, then do it here.
 * XXX-BZ handle the hw offloading case.  Need flags.
 */
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA_IPV6(0x00000400|0x00000200)) {
	in6_delayed_cksum(m, plen, hlen);
	m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA_IPV6(0x00000400|0x00000200);
}
993#ifdef SCTP1
if (m->m_pkthdr.csum_flags & CSUM_SCTP_IPV60x00000800) {
	sctp_delayed_cksum(m, hlen);
	m->m_pkthdr.csum_flags &= ~CSUM_SCTP_IPV60x00000800;
}
998#endif
/*
 * Change the next header field of the last header in the
 * unfragmentable part.
 */
if (exthdrs.ip6e_rthdr) {
	nextproto = *mtod(exthdrs.ip6e_rthdr, u_char *)((u_char *)((exthdrs.ip6e_rthdr)->m_data));
	*mtod(exthdrs.ip6e_rthdr, u_char *)((u_char *)((exthdrs.ip6e_rthdr)->m_data)) = IPPROTO_FRAGMENT44;
} else if (exthdrs.ip6e_dest1) {
	nextproto = *mtod(exthdrs.ip6e_dest1, u_char *)((u_char *)((exthdrs.ip6e_dest1)->m_data));
	*mtod(exthdrs.ip6e_dest1, u_char *)((u_char *)((exthdrs.ip6e_dest1)->m_data)) = IPPROTO_FRAGMENT44;
} else if (exthdrs.ip6e_hbh) {
	nextproto = *mtod(exthdrs.ip6e_hbh, u_char *)((u_char *)((exthdrs.ip6e_hbh)->m_data));
	*mtod(exthdrs.ip6e_hbh, u_char *)((u_char *)((exthdrs.ip6e_hbh)->m_data)) = IPPROTO_FRAGMENT44;
} else {
	nextproto = ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt;
	ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt = IPPROTO_FRAGMENT44;
}

/*
 * Loop through length of segment after first fragment,
 * make new header and copy data of each part and link onto
 * chain.
 */
m0 = m;
id = htonl(ip6_randomid())(__builtin_constant_p(ip6_randomid()) ? (((__uint32_t)((__uint16_t
)(__builtin_constant_p(((__uint32_t)(ip6_randomid())) & 0xffff
) ? (__uint16_t)(((__uint16_t)(((__uint32_t)(ip6_randomid()))
 & 0xffff)) << 8 | ((__uint16_t)(((__uint32_t)(ip6_randomid
())) & 0xffff)) >> 8) : __bswap16_var(((__uint32_t)
(ip6_randomid())) & 0xffff))) << 16) | ((__uint16_t
)(__builtin_constant_p(((__uint32_t)(ip6_randomid())) >>
 16) ? (__uint16_t)(((__uint16_t)(((__uint32_t)(ip6_randomid(
))) >> 16)) << 8 | ((__uint16_t)(((__uint32_t)(ip6_randomid
())) >> 16)) >> 8) : __bswap16_var(((__uint32_t)(
ip6_randomid())) >> 16)))) : __bswap32_var(ip6_randomid
()));
if ((error = ip6_fragment(ifp, m, hlen, nextproto, len, id)))
	goto sendorfree;

in6_ifstat_inc(ifp, ifs6_out_fragok)do { if (ifp) counter_u64_add(((struct in6_ifextra *) ((ifp)->
if_afdata[28]))->in6_ifstat[ __builtin_offsetof(struct in6_ifstat
, ifs6_out_fragok) / sizeof(uint64_t)], 1);} while ( 0);
}

/*
* Remove leading garbages.
*/
1033sendorfree:
m = m0->m_nextpkt;
m0->m_nextpkt = 0;
m_freem(m0);
for (; m; m = m0) {
m0 = m->m_nextpkt;
m->m_nextpkt = 0;
if (error == 0) {
	/* Record statistics for this interface address. */
	if (ia) {
		counter_u64_add(ia->ia_ifa.ifa_opackets, 1);
		counter_u64_add(ia->ia_ifa.ifa_obytes,
		    m->m_pkthdr.len);
	}
1047#ifdef RATELIMIT
	if (inp != NULL((void *)0)) {
		if (inp->inp_flags2 & INP_RATE_LIMIT_CHANGED0x00000400)
			in_pcboutput_txrtlmt(inp, ifp, m);
		/* stamp send tag on mbuf */
		m->m_pkthdr.snd_tag = inp->inp_snd_tag;
	} else {
		m->m_pkthdr.snd_tag = NULL((void *)0);
	}
1056#endif
	error = nd6_output_ifp(ifp, origifp, m, dst,
	    (struct route *)ro);
1059#ifdef RATELIMIT
	/* check for route change */
	if (error == EAGAIN35)
		in_pcboutput_eagain(inp);
1063#endif
} else
	m_freem(m);
}

if (error == 0)
IP6STAT_INC(ip6s_fragmented)counter_u64_add((*(__typeof(vnet_entry_ip6stat)*) (((((__curthread
())->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6stat
))[__builtin_offsetof(struct ip6stat, ip6s_fragmented) / sizeof
(uint64_t)], ((1)));

1071done:
if (ro == &ip6route)
RO_RTFREE(ro)do { if ((ro)->ro_rt) do { __mtx_lock_flags(&((((&
((ro)->ro_rt)->rt_mtx))))->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (1073)); do { if (((ro)->ro_rt)->rt_refcnt <= 1) rtfree
((ro)->ro_rt); else { do { __mtx_assert(&(((&((ro)
->ro_rt)->rt_mtx)))->mtx_lock, ((0x00000004)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (1073)); do { if (__builtin_expect((!(((ro)->ro_rt)->
rt_refcnt > 0)), 0)) panic ("bogus refcnt %d", ((ro)->ro_rt
)->rt_refcnt); } while (0); ((ro)->ro_rt)->rt_refcnt
--; } while (0); __mtx_unlock_flags(&((((&((ro)->ro_rt
)->rt_mtx))))->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (1073)); } (ro)->ro_rt = 0; } while (0); } while (0); }
 while (0);
return (error);

1076freehdrs:
m_freem(exthdrs.ip6e_hbh);	/* m_freem will check if mbuf is 0 */
m_freem(exthdrs.ip6e_dest1);
m_freem(exthdrs.ip6e_rthdr);
m_freem(exthdrs.ip6e_dest2);
/* FALLTHROUGH */
1082bad:
if (m)
m_freem(m);
goto done;
1086}

1088static int
1089ip6_copyexthdr(struct mbuf **mp, caddr_t hdr, int hlen)
1090{
struct mbuf *m;

if (hlen > MCLBYTES(1 << 11))
return (ENOBUFS55); /* XXX */

if (hlen > MLEN((int)(256 - __builtin_offsetof(struct mbuf, m_dat))))
m = m_getcl(M_NOWAIT0x0001, MT_DATA1, 0);
else
m = m_get(M_NOWAIT0x0001, MT_DATA1);
if (m == NULL((void *)0))
return (ENOBUFS55);
m->m_len = hlen;
if (hdr)
bcopy(hdr, mtod(m, caddr_t), hlen)__builtin_memmove((((caddr_t)((m)->m_data))), (hdr), (hlen
));

*mp = m;
return (0);
1108}

1110/*
* Insert jumbo payload option.
*/
1113static int
1114ip6_insert_jumboopt(struct ip6_exthdrs *exthdrs, u_int32_t plen)
1115{
struct mbuf *mopt;
u_char *optbuf;
u_int32_t v;

1120#define JUMBOOPTLEN	8	/* length of jumbo payload option and padding */

/*
* If there is no hop-by-hop options header, allocate new one.
* If there is one but it doesn't have enough space to store the
* jumbo payload option, allocate a cluster to store the whole options.
* Otherwise, use it to store the options.
*/
if (exthdrs->ip6e_hbh == NULL((void *)0)) {
mopt = m_get(M_NOWAIT0x0001, MT_DATA1);
if (mopt == NULL((void *)0))
	return (ENOBUFS55);
mopt->m_len = JUMBOOPTLEN;
optbuf = mtod(mopt, u_char *)((u_char *)((mopt)->m_data));
optbuf[1] = 0;	/* = ((JUMBOOPTLEN) >> 3) - 1 */
exthdrs->ip6e_hbh = mopt;
} else {
struct ip6_hbh *hbh;

mopt = exthdrs->ip6e_hbh;
if (M_TRAILINGSPACE(mopt)((!((mopt)->m_flags & 0x00000008) && (!(((mopt
)->m_flags & 0x00000001)) || (m_extrefcnt(mopt) == 1))
) ? (((((mopt)->m_flags & 0x00000001) ? (mopt)->m_ext
.ext_buf : ((mopt)->m_flags & 0x00000002) ? &(mopt
)->m_pktdat[0] : &(mopt)->m_dat[0]) + (((mopt)->
m_flags & 0x00000001) ? (mopt)->m_ext.ext_size : ((mopt
)->m_flags & 0x00000002) ? ((int)(256 - __builtin_offsetof
(struct mbuf, m_pktdat))) : ((int)(256 - __builtin_offsetof(struct
 mbuf, m_dat))))) - ((mopt)->m_data + (mopt)->m_len)) :
 0) < JUMBOOPTLEN) {
	/*
	 * XXX assumption:
	 * - exthdrs->ip6e_hbh is not referenced from places
	 *   other than exthdrs.
	 * - exthdrs->ip6e_hbh is not an mbuf chain.
	 */
	int oldoptlen = mopt->m_len;
	struct mbuf *n;

	/*
	 * XXX: give up if the whole (new) hbh header does
	 * not fit even in an mbuf cluster.
	 */
	if (oldoptlen + JUMBOOPTLEN > MCLBYTES(1 << 11))
		return (ENOBUFS55);

	/*
	 * As a consequence, we must always prepare a cluster
	 * at this point.
	 */
	n = m_getcl(M_NOWAIT0x0001, MT_DATA1, 0);
	if (n == NULL((void *)0))
		return (ENOBUFS55);
	n->m_len = oldoptlen + JUMBOOPTLEN;
	bcopy(mtod(mopt, caddr_t), mtod(n, caddr_t),__builtin_memmove((((caddr_t)((n)->m_data))), (((caddr_t)(
(mopt)->m_data))), (oldoptlen))
	    oldoptlen)__builtin_memmove((((caddr_t)((n)->m_data))), (((caddr_t)(
(mopt)->m_data))), (oldoptlen));
	optbuf = mtod(n, caddr_t)((caddr_t)((n)->m_data)) + oldoptlen;
	m_freem(mopt);
	mopt = exthdrs->ip6e_hbh = n;
} else {
	optbuf = mtod(mopt, u_char *)((u_char *)((mopt)->m_data)) + mopt->m_len;
	mopt->m_len += JUMBOOPTLEN;
}
optbuf[0] = IP6OPT_PADN0x01;
optbuf[1] = 1;

/*
 * Adjust the header length according to the pad and
 * the jumbo payload option.
 */
hbh = mtod(mopt, struct ip6_hbh *)((struct ip6_hbh *)((mopt)->m_data));
hbh->ip6h_len += (JUMBOOPTLEN >> 3);
}

/* fill in the option. */
optbuf[2] = IP6OPT_JUMBO0xC2;
optbuf[3] = 4;
v = (u_int32_t)htonl(plen + JUMBOOPTLEN)(__builtin_constant_p(plen + JUMBOOPTLEN) ? (((__uint32_t)((__uint16_t
)(__builtin_constant_p(((__uint32_t)(plen + JUMBOOPTLEN)) &
 0xffff) ? (__uint16_t)(((__uint16_t)(((__uint32_t)(plen + JUMBOOPTLEN
)) & 0xffff)) << 8 | ((__uint16_t)(((__uint32_t)(plen
 + JUMBOOPTLEN)) & 0xffff)) >> 8) : __bswap16_var((
(__uint32_t)(plen + JUMBOOPTLEN)) & 0xffff))) << 16
) | ((__uint16_t)(__builtin_constant_p(((__uint32_t)(plen + JUMBOOPTLEN
)) >> 16) ? (__uint16_t)(((__uint16_t)(((__uint32_t)(plen
 + JUMBOOPTLEN)) >> 16)) << 8 | ((__uint16_t)(((__uint32_t
)(plen + JUMBOOPTLEN)) >> 16)) >> 8) : __bswap16_var
(((__uint32_t)(plen + JUMBOOPTLEN)) >> 16)))) : __bswap32_var
(plen + JUMBOOPTLEN));
bcopy(&v, &optbuf[4], sizeof(u_int32_t))__builtin_memmove((&optbuf[4]), (&v), (sizeof(u_int32_t
)));

/* finally, adjust the packet header length */
exthdrs->ip6e_ip6->m_pkthdr.len += JUMBOOPTLEN;

return (0);
1195#undef JUMBOOPTLEN
1196}

1198/*
* Insert fragment header and copy unfragmentable header portions.
*/
1201static int
1202ip6_insertfraghdr(struct mbuf *m0, struct mbuf *m, int hlen,
  struct ip6_frag **frghdrp)
1204{
struct mbuf *n, *mlast;

if (hlen > sizeof(struct ip6_hdr)) {
n = m_copym(m0, sizeof(struct ip6_hdr),
    hlen - sizeof(struct ip6_hdr), M_NOWAIT0x0001);
if (n == NULL((void *)0))
	return (ENOBUFS55);
m->m_next = n;
} else
n = m;

/* Search for the last mbuf of unfragmentable part. */
for (mlast = n; mlast->m_next; mlast = mlast->m_next)
;

if (M_WRITABLE(mlast)(!((mlast)->m_flags & 0x00000008) && (!(((mlast
)->m_flags & 0x00000001)) || (m_extrefcnt(mlast) == 1)
)) &&
   M_TRAILINGSPACE(mlast)((!((mlast)->m_flags & 0x00000008) && (!(((mlast
)->m_flags & 0x00000001)) || (m_extrefcnt(mlast) == 1)
)) ? (((((mlast)->m_flags & 0x00000001) ? (mlast)->
m_ext.ext_buf : ((mlast)->m_flags & 0x00000002) ? &
(mlast)->m_pktdat[0] : &(mlast)->m_dat[0]) + (((mlast
)->m_flags & 0x00000001) ? (mlast)->m_ext.ext_size :
 ((mlast)->m_flags & 0x00000002) ? ((int)(256 - __builtin_offsetof
(struct mbuf, m_pktdat))) : ((int)(256 - __builtin_offsetof(struct
 mbuf, m_dat))))) - ((mlast)->m_data + (mlast)->m_len))
 : 0) >= sizeof(struct ip6_frag)) {
/* use the trailing space of the last mbuf for the fragment hdr */
*frghdrp = (struct ip6_frag *)(mtod(mlast, caddr_t)((caddr_t)((mlast)->m_data)) +
    mlast->m_len);
mlast->m_len += sizeof(struct ip6_frag);
m->m_pkthdr.len += sizeof(struct ip6_frag);
} else {
/* allocate a new mbuf for the fragment header */
struct mbuf *mfrg;

mfrg = m_get(M_NOWAIT0x0001, MT_DATA1);
if (mfrg == NULL((void *)0))
	return (ENOBUFS55);
mfrg->m_len = sizeof(struct ip6_frag);
*frghdrp = mtod(mfrg, struct ip6_frag *)((struct ip6_frag *)((mfrg)->m_data));
mlast->m_next = mfrg;
}

return (0);
1240}

1242/*
* Calculates IPv6 path mtu for destination @dst.
* Resulting MTU is stored in @mtup.
*
* Returns 0 on success.
*/
1248static int
1249ip6_getpmtu_ctl(u_int fibnum, const struct in6_addr *dst, u_long *mtup)
1250{
struct nhop6_extended nh6;
struct in6_addr kdst;
uint32_t scopeid;
struct ifnet *ifp;
u_long mtu;
int error;

in6_splitscope(dst, &kdst, &scopeid);
if (fib6_lookup_nh_ext(fibnum, &kdst, scopeid, NHR_REF0x02, 0, &nh6) != 0)
return (EHOSTUNREACH65);

ifp = nh6.nh_ifp;
mtu = nh6.nh_mtu;

error = ip6_calcmtu(ifp, dst, mtu, mtup, NULL((void *)0), 0);
fib6_free_nh_ext(fibnum, &nh6);

return (error);
1269}

1271/*
* Calculates IPv6 path MTU for @dst based on transmit @ifp,
* and cached data in @ro_pmtu.
* MTU from (successful) route lookup is saved (along with dst)
* inside @ro_pmtu to avoid subsequent route lookups after packet
* filter processing.
*
* Stores mtu and always-frag value into @mtup and @alwaysfragp.
* Returns 0 on success.
*/
1281static int
1282ip6_getpmtu(struct route_in6 *ro_pmtu, int do_lookup,
  struct ifnet *ifp, const struct in6_addr *dst, u_long *mtup,
  int *alwaysfragp, u_int fibnum, u_int proto)
1285{
struct nhop6_basic nh6;
struct in6_addr kdst;
uint32_t scopeid;
struct sockaddr_in6 *sa6_dst;
u_long mtu;

mtu = 0;
if (do_lookup) {

/*
 * Here ro_pmtu has final destination address, while
 * ro might represent immediate destination.
 * Use ro_pmtu destination since mtu might differ.
 */
sa6_dst = (struct sockaddr_in6 *)&ro_pmtu->ro_dst;
if (!IN6_ARE_ADDR_EQUAL(&sa6_dst->sin6_addr, dst)(__builtin_memcmp((&(&sa6_dst->sin6_addr)->__u6_addr
.__u6_addr8[0]), (&(dst)->__u6_addr.__u6_addr8[0]), (sizeof
(struct in6_addr))) == 0))
	ro_pmtu->ro_mtu = 0;

if (ro_pmtu->ro_mtu == 0) {
	bzero(sa6_dst, sizeof(*sa6_dst))__builtin_memset((sa6_dst), 0, (sizeof(*sa6_dst)));
	sa6_dst->sin6_family = AF_INET628;
	sa6_dst->sin6_len = sizeof(struct sockaddr_in6);
	sa6_dst->sin6_addr = *dst;

	in6_splitscope(dst, &kdst, &scopeid);
	if (fib6_lookup_nh_basic(fibnum, &kdst, scopeid, 0, 0,
	    &nh6) == 0)
		ro_pmtu->ro_mtu = nh6.nh_mtu;
}

mtu = ro_pmtu->ro_mtu;
}

if (ro_pmtu->ro_rt)
mtu = ro_pmtu->ro_rt->rt_mtu;

return (ip6_calcmtu(ifp, dst, mtu, mtup, alwaysfragp, proto));
1323}

1325/*
* Calculate MTU based on transmit @ifp, route mtu @rt_mtu and
* hostcache data for @dst.
* Stores mtu and always-frag value into @mtup and @alwaysfragp.
*
* Returns 0 on success.
*/
1332static int
1333ip6_calcmtu(struct ifnet *ifp, const struct in6_addr *dst, u_long rt_mtu,
  u_long *mtup, int *alwaysfragp, u_int proto)
1335{
u_long mtu = 0;
int alwaysfrag = 0;
int error = 0;

if (rt_mtu > 0) {
u_int32_t ifmtu;
struct in_conninfo inc;

bzero(&inc, sizeof(inc))__builtin_memset((&inc), 0, (sizeof(inc)));
inc.inc_flags |= INC_ISIPV60x01;
inc.inc6_faddrinc_ie.ie_dependfaddr.id6_addr = *dst;

ifmtu = IN6_LINKMTU(ifp)(((((struct in6_ifextra *)(ifp)->if_afdata[28])->nd_ifinfo
)->linkmtu && (((struct in6_ifextra *)(ifp)->if_afdata
[28])->nd_ifinfo)->linkmtu < (ifp)->if_mtu) ? (((
struct in6_ifextra *)(ifp)->if_afdata[28])->nd_ifinfo)->
linkmtu : (((((struct in6_ifextra *)(ifp)->if_afdata[28])->
nd_ifinfo)->maxmtu && (((struct in6_ifextra *)(ifp
)->if_afdata[28])->nd_ifinfo)->maxmtu < (ifp)->
if_mtu) ? (((struct in6_ifextra *)(ifp)->if_afdata[28])->
nd_ifinfo)->maxmtu : (ifp)->if_mtu));

/* TCP is known to react to pmtu changes so skip hc */
if (proto != IPPROTO_TCP6)
	mtu = tcp_hc_getmtu(&inc);

if (mtu)
	mtu = min(mtu, rt_mtu);
else
	mtu = rt_mtu;
if (mtu == 0)
	mtu = ifmtu;
else if (mtu < IPV6_MMTU1280) {
	/*
	 * RFC2460 section 5, last paragraph:
	 * if we record ICMPv6 too big message with
	 * mtu < IPV6_MMTU, transmit packets sized IPV6_MMTU
	 * or smaller, with framgent header attached.
	 * (fragment header is needed regardless from the
	 * packet size, for translators to identify packets)
	 */
	alwaysfrag = 1;
	mtu = IPV6_MMTU1280;
}
} else if (ifp) {
mtu = IN6_LINKMTU(ifp)(((((struct in6_ifextra *)(ifp)->if_afdata[28])->nd_ifinfo
)->linkmtu && (((struct in6_ifextra *)(ifp)->if_afdata
[28])->nd_ifinfo)->linkmtu < (ifp)->if_mtu) ? (((
struct in6_ifextra *)(ifp)->if_afdata[28])->nd_ifinfo)->
linkmtu : (((((struct in6_ifextra *)(ifp)->if_afdata[28])->
nd_ifinfo)->maxmtu && (((struct in6_ifextra *)(ifp
)->if_afdata[28])->nd_ifinfo)->maxmtu < (ifp)->
if_mtu) ? (((struct in6_ifextra *)(ifp)->if_afdata[28])->
nd_ifinfo)->maxmtu : (ifp)->if_mtu));
} else
error = EHOSTUNREACH65; /* XXX */

*mtup = mtu;
if (alwaysfragp)
*alwaysfragp = alwaysfrag;
return (error);
1381}

1383/*
* IP6 socket option processing.
*/
1386int
1387ip6_ctloutput(struct socket *so, struct sockopt *sopt)
1388{
int optdatalen, uproto;
void *optdata;
struct inpcb *in6p = sotoinpcb(so)((struct inpcb *)(so)->so_pcb);
int error, optval;
int level, op, optname;
int optlen;
struct thread *td;
1396#ifdef	RSS
uint32_t rss_bucket;
int retval;
1399#endif

1401/*
* Don't use more than a quarter of mbuf clusters.  N.B.:
* nmbclusters is an int, but nmbclusters * MCLBYTES may overflow
* on LP64 architectures, so cast to u_long to avoid undefined
* behavior.  ILP32 architectures cannot have nmbclusters
* large enough to overflow for other reasons.
*/
1408#define IPV6_PKTOPTIONS_MBUF_LIMIT((u_long)nmbclusters * (1 << 11) / 4)	((u_long)nmbclusters * MCLBYTES(1 << 11) / 4)

level = sopt->sopt_level;
op = sopt->sopt_dir;
optname = sopt->sopt_name;
optlen = sopt->sopt_valsize;
td = sopt->sopt_td;
error = 0;
optval = 0;
uproto = (int)so->so_proto->pr_protocol;

if (level != IPPROTO_IPV641) {
1
Assuming 'level' is equal to IPPROTO_IPV6→
2
←
Taking false branch→
error = EINVAL22;

if (sopt->sopt_level == SOL_SOCKET0xffff &&
    sopt->sopt_dir == SOPT_SET) {
	switch (sopt->sopt_name) {
	case SO_REUSEADDR0x00000004:
		INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1426);
		if ((so->so_options & SO_REUSEADDR0x00000004) != 0)
			in6p->inp_flags2 |= INP_REUSEADDR0x00000020;
		else
			in6p->inp_flags2 &= ~INP_REUSEADDR0x00000020;
		INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1431);
		error = 0;
		break;
	case SO_REUSEPORT0x00000200:
		INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1435);
		if ((so->so_options & SO_REUSEPORT0x00000200) != 0)
			in6p->inp_flags2 |= INP_REUSEPORT0x00000008;
		else
			in6p->inp_flags2 &= ~INP_REUSEPORT0x00000008;
		INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1440);
		error = 0;
		break;
	case SO_REUSEPORT_LB0x00010000:
		INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1444);
		if ((so->so_options & SO_REUSEPORT_LB0x00010000) != 0)
			in6p->inp_flags2 |= INP_REUSEPORT_LB0x00002000;
		else
			in6p->inp_flags2 &= ~INP_REUSEPORT_LB0x00002000;
		INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1449);
		error = 0;
		break;
	case SO_SETFIB0x1014:
		INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1453);
		in6p->inp_inc.inc_fibnum = so->so_fibnum;
		INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1455);
		error = 0;
		break;
	case SO_MAX_PACING_RATE0x1018:
1459#ifdef RATELIMIT
		INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1460);
		in6p->inp_flags2 |= INP_RATE_LIMIT_CHANGED0x00000400;
		INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1462);
		error = 0;
1464#else
		error = EOPNOTSUPP45;
1466#endif
		break;
	default:
		break;
	}
}
} else {		/* level == IPPROTO_IPV6 */
switch (op) {
3
←
Control jumps to 'case SOPT_GET:'  at line 1919→

case SOPT_SET:
	switch (optname) {
	case IPV6_2292PKTOPTIONS25:
1478#ifdef IPV6_PKTOPTIONS
	case IPV6_PKTOPTIONS:
1480#endif
	{
		struct mbuf *m;

		if (optlen > IPV6_PKTOPTIONS_MBUF_LIMIT((u_long)nmbclusters * (1 << 11) / 4)) {
			printf("ip6_ctloutput: mbuf limit hit\n");
			error = ENOBUFS55;
			break;
		}

		error = soopt_getm(sopt, &m); /* XXX */
		if (error != 0)
			break;
		error = soopt_mcopyin(sopt, m); /* XXX */
		if (error != 0)
			break;
		error = ip6_pcbopts(&in6p->in6p_outputopts,
				    m, so, sopt);
		m_freem(m); /* XXX */
		break;
	}

	/*
	 * Use of some Hop-by-Hop options or some
	 * Destination options, might require special
	 * privilege.  That is, normal applications
	 * (without special privilege) might be forbidden
	 * from setting certain options in outgoing packets,
	 * and might never see certain options in received
	 * packets. [RFC 2292 Section 6]
	 * KAME specific note:
	 *  KAME prevents non-privileged users from sending or
	 *  receiving ANY hbh/dst options in order to avoid
	 *  overhead of parsing options in the kernel.
	 */
	case IPV6_RECVHOPOPTS39:
	case IPV6_RECVDSTOPTS40:
	case IPV6_RECVRTHDRDSTOPTS41:
		if (td != NULL((void *)0)) {
			error = priv_check(td,
			    PRIV_NETINET_SETHDROPTS505);
			if (error)
				break;
		}
		/* FALLTHROUGH */
	case IPV6_UNICAST_HOPS4:
	case IPV6_HOPLIMIT47:

	case IPV6_RECVPKTINFO36:
	case IPV6_RECVHOPLIMIT37:
	case IPV6_RECVRTHDR38:
	case IPV6_RECVPATHMTU43:
	case IPV6_RECVTCLASS57:
	case IPV6_RECVFLOWID70:
1534#ifdef	RSS
	case IPV6_RECVRSSBUCKETID71:
1536#endif
	case IPV6_V6ONLY27:
	case IPV6_AUTOFLOWLABEL59:
	case IPV6_ORIGDSTADDR72:
	case IPV6_BINDANY64:
	case IPV6_BINDMULTI65:
1542#ifdef	RSS
	case IPV6_RSS_LISTEN_BUCKET66:
1544#endif
		if (optname == IPV6_BINDANY64 && td != NULL((void *)0)) {
			error = priv_check(td,
			    PRIV_NETINET_BINDANY506);
			if (error)
				break;
		}

		if (optlen != sizeof(int)) {
			error = EINVAL22;
			break;
		}
		error = sooptcopyin(sopt, &optval,
			sizeof optval, sizeof optval);
		if (error)
			break;
		switch (optname) {

		case IPV6_UNICAST_HOPS4:
			if (optval < -1 || optval >= 256)
				error = EINVAL22;
			else {
				/* -1 = kernel default */
				in6p->in6p_hops = optval;
				if ((in6p->inp_vflag &
				     INP_IPV40x1) != 0)
					in6p->inp_ip_ttl = optval;
			}
			break;
1573#define OPTSET(bit) \
1574do { \
INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1575); \
if (optval) \
in6p->inp_flags |= (bit); \
else \
in6p->inp_flags &= ~(bit); \
INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1580); \
1581} while (/*CONSTCOND*/ 0)
1582#define OPTSET2292(bit)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1582); in6p->
inp_flags |= 0x40000000; if (optval) in6p->inp_flags |= (bit
); else in6p->inp_flags &= ~(bit); _rw_wunlock_cookie(
&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1582); } while ( 0) \
1583do { \
INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1584); \
in6p->inp_flags |= IN6P_RFC22920x40000000; \
if (optval) \
in6p->inp_flags |= (bit); \
else \
in6p->inp_flags &= ~(bit); \
INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1590); \
1591} while (/*CONSTCOND*/ 0)
1592#define OPTBIT(bit)(in6p->inp_flags & (bit) ? 1 : 0) (in6p->inp_flags & (bit) ? 1 : 0)

1594#define OPTSET2_N(bit, val)do { if (val) in6p->inp_flags2 |= bit; else in6p->inp_flags2
 &= ~bit; } while (0) do {					\
if (val)							\
in6p->inp_flags2 |= bit;				\
else								\
in6p->inp_flags2 &= ~bit;				\
1599} while (0)
1600#define OPTSET2(bit, val)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1600); do { if (
val) in6p->inp_flags2 |= bit; else in6p->inp_flags2 &=
 ~bit; } while (0); _rw_wunlock_cookie(&((&(in6p)->
inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1600); } while (0) do {						\
INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1601);						\
OPTSET2_N(bit, val)do { if (val) in6p->inp_flags2 |= bit; else in6p->inp_flags2
 &= ~bit; } while (0);						\
INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1603);						\
1604} while (0)
1605#define OPTBIT2(bit)(in6p->inp_flags2 & (bit) ? 1 : 0) (in6p->inp_flags2 & (bit) ? 1 : 0)
1606#define OPTSET2292_EXCLUSIVE(bit)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1606); if ((in6p
->inp_flags & (0x40000000) ? 1 : 0)) { error = 22; } else
 { if (optval) in6p->inp_flags |= (bit); else in6p->inp_flags
 &= ~(bit); } _rw_wunlock_cookie(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 1606
); } while ( 0)					\
1607do {									\
INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1608);						\
if (OPTBIT(IN6P_RFC2292)(in6p->inp_flags & (0x40000000) ? 1 : 0)) {					\
error = EINVAL22;						\
} else {							\
if (optval)						\
	in6p->inp_flags |= (bit);			\
else							\
	in6p->inp_flags &= ~(bit);			\
}								\
INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1617);						\
1618} while (/*CONSTCOND*/ 0)

		case IPV6_RECVPKTINFO36:
			OPTSET2292_EXCLUSIVE(IN6P_PKTINFO)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1621); if ((in6p
->inp_flags & (0x40000000) ? 1 : 0)) { error = 22; } else
 { if (optval) in6p->inp_flags |= (0x00010000); else in6p->
inp_flags &= ~(0x00010000); } _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1621); } while ( 0);
			break;

		case IPV6_HOPLIMIT47:
		{
			struct ip6_pktopts **optp;

			/* cannot mix with RFC2292 */
			if (OPTBIT(IN6P_RFC2292)(in6p->inp_flags & (0x40000000) ? 1 : 0)) {
				error = EINVAL22;
				break;
			}
			INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1633);
			if (in6p->inp_flags & (INP_TIMEWAIT0x01000000 | INP_DROPPED0x04000000)) {
				INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1635);
				return (ECONNRESET54);
			}
			optp = &in6p->in6p_outputopts;
			error = ip6_pcbopt(IPV6_HOPLIMIT47,
			    (u_char *)&optval, sizeof(optval),
			    optp, (td != NULL((void *)0)) ? td->td_ucred :
			    NULL((void *)0), uproto);
			INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1643);
			break;
		}

		case IPV6_RECVHOPLIMIT37:
			OPTSET2292_EXCLUSIVE(IN6P_HOPLIMIT)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1648); if ((in6p
->inp_flags & (0x40000000) ? 1 : 0)) { error = 22; } else
 { if (optval) in6p->inp_flags |= (0x00020000); else in6p->
inp_flags &= ~(0x00020000); } _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1648); } while ( 0);
			break;

		case IPV6_RECVHOPOPTS39:
			OPTSET2292_EXCLUSIVE(IN6P_HOPOPTS)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1652); if ((in6p
->inp_flags & (0x40000000) ? 1 : 0)) { error = 22; } else
 { if (optval) in6p->inp_flags |= (0x00040000); else in6p->
inp_flags &= ~(0x00040000); } _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1652); } while ( 0);
			break;

		case IPV6_RECVDSTOPTS40:
			OPTSET2292_EXCLUSIVE(IN6P_DSTOPTS)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1656); if ((in6p
->inp_flags & (0x40000000) ? 1 : 0)) { error = 22; } else
 { if (optval) in6p->inp_flags |= (0x00080000); else in6p->
inp_flags &= ~(0x00080000); } _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1656); } while ( 0);
			break;

		case IPV6_RECVRTHDRDSTOPTS41:
			OPTSET2292_EXCLUSIVE(IN6P_RTHDRDSTOPTS)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1660); if ((in6p
->inp_flags & (0x40000000) ? 1 : 0)) { error = 22; } else
 { if (optval) in6p->inp_flags |= (0x00200000); else in6p->
inp_flags &= ~(0x00200000); } _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1660); } while ( 0);
			break;

		case IPV6_RECVRTHDR38:
			OPTSET2292_EXCLUSIVE(IN6P_RTHDR)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1664); if ((in6p
->inp_flags & (0x40000000) ? 1 : 0)) { error = 22; } else
 { if (optval) in6p->inp_flags |= (0x00100000); else in6p->
inp_flags &= ~(0x00100000); } _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1664); } while ( 0);
			break;

		case IPV6_RECVPATHMTU43:
			/*
			 * We ignore this option for TCP
			 * sockets.
			 * (RFC3542 leaves this case
			 * unspecified.)
			 */
			if (uproto != IPPROTO_TCP6)
				OPTSET(IN6P_MTU0x80000000);
			break;

		case IPV6_RECVFLOWID70:
			OPTSET2(INP_RECVFLOWID, optval)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1679); do { if (
optval) in6p->inp_flags2 |= 0x00000100; else in6p->inp_flags2
 &= ~0x00000100; } while (0); _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1679); } while (0);
			break;

1682#ifdef	RSS
		case IPV6_RECVRSSBUCKETID71:
			OPTSET2(INP_RECVRSSBUCKETID, optval)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1684); do { if (
optval) in6p->inp_flags2 |= 0x00000200; else in6p->inp_flags2
 &= ~0x00000200; } while (0); _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1684); } while (0);
			break;
1686#endif

		case IPV6_V6ONLY27:
			/*
			 * make setsockopt(IPV6_V6ONLY)
			 * available only prior to bind(2).
			 * see ipng mailing list, Jun 22 2001.
			 */
			if (in6p->inp_lportinp_inc.inc_ie.ie_lport ||
			    !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)((&in6p->inp_inc.inc_ie.ie_dependladdr.id6_addr)->__u6_addr
.__u6_addr32[0] == 0 && (&in6p->inp_inc.inc_ie
.ie_dependladdr.id6_addr)->__u6_addr.__u6_addr32[1] == 0 &&
 (&in6p->inp_inc.inc_ie.ie_dependladdr.id6_addr)->__u6_addr
.__u6_addr32[2] == 0 && (&in6p->inp_inc.inc_ie
.ie_dependladdr.id6_addr)->__u6_addr.__u6_addr32[3] == 0)) {
				error = EINVAL22;
				break;
			}
			OPTSET(IN6P_IPV6_V6ONLY0x00008000);
			if (optval)
				in6p->inp_vflag &= ~INP_IPV40x1;
			else
				in6p->inp_vflag |= INP_IPV40x1;
			break;
		case IPV6_RECVTCLASS57:
			/* cannot mix with RFC2292 XXX */
			OPTSET2292_EXCLUSIVE(IN6P_TCLASS)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1707); if ((in6p
->inp_flags & (0x40000000) ? 1 : 0)) { error = 22; } else
 { if (optval) in6p->inp_flags |= (0x00400000); else in6p->
inp_flags &= ~(0x00400000); } _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1707); } while ( 0);
			break;
		case IPV6_AUTOFLOWLABEL59:
			OPTSET(IN6P_AUTOFLOWLABEL0x00800000);
			break;

		case IPV6_ORIGDSTADDR72:
			OPTSET2(INP_ORIGDSTADDR, optval)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1714); do { if (
optval) in6p->inp_flags2 |= 0x00000800; else in6p->inp_flags2
 &= ~0x00000800; } while (0); _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1714); } while (0);
			break;
		case IPV6_BINDANY64:
			OPTSET(INP_BINDANY0x00001000);
			break;

		case IPV6_BINDMULTI65:
			OPTSET2(INP_BINDMULTI, optval)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1721); do { if (
optval) in6p->inp_flags2 |= 0x00000040; else in6p->inp_flags2
 &= ~0x00000040; } while (0); _rw_wunlock_cookie(&((&
(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1721); } while (0);
			break;
1723#ifdef	RSS
		case IPV6_RSS_LISTEN_BUCKET66:
			if ((optval >= 0) &&
			    (optval < rss_getnumbuckets())) {
				INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1727);
				in6p->inp_rss_listen_bucket = optval;
				OPTSET2_N(INP_RSS_BUCKET_SET, 1)do { if (1) in6p->inp_flags2 |= 0x00000080; else in6p->
inp_flags2 &= ~0x00000080; } while (0);
				INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1730);
			} else {
				error = EINVAL22;
			}
			break;
1735#endif
		}
		break;

	case IPV6_TCLASS61:
	case IPV6_DONTFRAG62:
	case IPV6_USE_MIN_MTU42:
	case IPV6_PREFER_TEMPADDR63:
		if (optlen != sizeof(optval)) {
			error = EINVAL22;
			break;
		}
		error = sooptcopyin(sopt, &optval,
			sizeof optval, sizeof optval);
		if (error)
			break;
		{
			struct ip6_pktopts **optp;
			INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1753);
			if (in6p->inp_flags & (INP_TIMEWAIT0x01000000 | INP_DROPPED0x04000000)) {
				INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1755);
				return (ECONNRESET54);
			}
			optp = &in6p->in6p_outputopts;
			error = ip6_pcbopt(optname,
			    (u_char *)&optval, sizeof(optval),
			    optp, (td != NULL((void *)0)) ? td->td_ucred :
			    NULL((void *)0), uproto);
			INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1763);
			break;
		}

	case IPV6_2292PKTINFO19:
	case IPV6_2292HOPLIMIT20:
	case IPV6_2292HOPOPTS22:
	case IPV6_2292DSTOPTS23:
	case IPV6_2292RTHDR24:
		/* RFC 2292 */
		if (optlen != sizeof(int)) {
			error = EINVAL22;
			break;
		}
		error = sooptcopyin(sopt, &optval,
			sizeof optval, sizeof optval);
		if (error)
			break;
		switch (optname) {
		case IPV6_2292PKTINFO19:
			OPTSET2292(IN6P_PKTINFO)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1783); in6p->
inp_flags |= 0x40000000; if (optval) in6p->inp_flags |= (0x00010000
); else in6p->inp_flags &= ~(0x00010000); _rw_wunlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1783); } while ( 0);
			break;
		case IPV6_2292HOPLIMIT20:
			OPTSET2292(IN6P_HOPLIMIT)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1786); in6p->
inp_flags |= 0x40000000; if (optval) in6p->inp_flags |= (0x00020000
); else in6p->inp_flags &= ~(0x00020000); _rw_wunlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1786); } while ( 0);
			break;
		case IPV6_2292HOPOPTS22:
			/*
			 * Check super-user privilege.
			 * See comments for IPV6_RECVHOPOPTS.
			 */
			if (td != NULL((void *)0)) {
				error = priv_check(td,
				    PRIV_NETINET_SETHDROPTS505);
				if (error)
					return (error);
			}
			OPTSET2292(IN6P_HOPOPTS)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1799); in6p->
inp_flags |= 0x40000000; if (optval) in6p->inp_flags |= (0x00040000
); else in6p->inp_flags &= ~(0x00040000); _rw_wunlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1799); } while ( 0);
			break;
		case IPV6_2292DSTOPTS23:
			if (td != NULL((void *)0)) {
				error = priv_check(td,
				    PRIV_NETINET_SETHDROPTS505);
				if (error)
					return (error);
			}
			OPTSET2292(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1808); in6p->
inp_flags |= 0x40000000; if (optval) in6p->inp_flags |= (0x00080000
|0x00200000); else in6p->inp_flags &= ~(0x00080000|0x00200000
); _rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1808); } while (
 0); /* XXX */
			break;
		case IPV6_2292RTHDR24:
			OPTSET2292(IN6P_RTHDR)do { _rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1811); in6p->
inp_flags |= 0x40000000; if (optval) in6p->inp_flags |= (0x00100000
); else in6p->inp_flags &= ~(0x00100000); _rw_wunlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 1811); } while ( 0);
			break;
		}
		break;
	case IPV6_PKTINFO46:
	case IPV6_HOPOPTS49:
	case IPV6_RTHDR51:
	case IPV6_DSTOPTS50:
	case IPV6_RTHDRDSTOPTS35:
	case IPV6_NEXTHOP48:
	{
		/* new advanced API (RFC3542) */
		u_char *optbuf;
		u_char optbuf_storage[MCLBYTES(1 << 11)];
		int optlen;
		struct ip6_pktopts **optp;

		/* cannot mix with RFC2292 */
		if (OPTBIT(IN6P_RFC2292)(in6p->inp_flags & (0x40000000) ? 1 : 0)) {
			error = EINVAL22;
			break;
		}

		/*
		 * We only ensure valsize is not too large
		 * here.  Further validation will be done
		 * later.
		 */
		error = sooptcopyin(sopt, optbuf_storage,
		    sizeof(optbuf_storage), 0);
		if (error)
			break;
		optlen = sopt->sopt_valsize;
		optbuf = optbuf_storage;
		INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1845);
		if (in6p->inp_flags & (INP_TIMEWAIT0x01000000 | INP_DROPPED0x04000000)) {
			INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1847);
			return (ECONNRESET54);
		}
		optp = &in6p->in6p_outputopts;
		error = ip6_pcbopt(optname, optbuf, optlen,
		    optp, (td != NULL((void *)0)) ? td->td_ucred : NULL((void *)0),
		    uproto);
		INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1854);
		break;
	}
1857#undef OPTSET

	case IPV6_MULTICAST_IF9:
	case IPV6_MULTICAST_HOPS10:
	case IPV6_MULTICAST_LOOP11:
	case IPV6_JOIN_GROUP12:
	case IPV6_LEAVE_GROUP13:
	case IPV6_MSFILTER74:
	case MCAST_BLOCK_SOURCE84:
	case MCAST_UNBLOCK_SOURCE85:
	case MCAST_JOIN_GROUP80:
	case MCAST_LEAVE_GROUP81:
	case MCAST_JOIN_SOURCE_GROUP82:
	case MCAST_LEAVE_SOURCE_GROUP83:
		error = ip6_setmoptions(in6p, sopt);
		break;

	case IPV6_PORTRANGE14:
		error = sooptcopyin(sopt, &optval,
		    sizeof optval, sizeof optval);
		if (error)
			break;

		INP_WLOCK(in6p)_rw_wlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1880);
		switch (optval) {
		case IPV6_PORTRANGE_DEFAULT0:
			in6p->inp_flags &= ~(INP_LOWPORT0x00000020);
			in6p->inp_flags &= ~(INP_HIGHPORT0x00000010);
			break;

		case IPV6_PORTRANGE_HIGH1:
			in6p->inp_flags &= ~(INP_LOWPORT0x00000020);
			in6p->inp_flags |= INP_HIGHPORT0x00000010;
			break;

		case IPV6_PORTRANGE_LOW2:
			in6p->inp_flags &= ~(INP_HIGHPORT0x00000010);
			in6p->inp_flags |= INP_LOWPORT0x00000020;
			break;

		default:
			error = EINVAL22;
			break;
		}
		INP_WUNLOCK(in6p)_rw_wunlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 1901);
		break;

1904#if defined(IPSEC1) || defined(IPSEC_SUPPORT1)
	case IPV6_IPSEC_POLICY28:
		if (IPSEC_ENABLED(ipv6)((ipv6_ipsec_support)->enabled & 0x0001)) {
			error = IPSEC_PCBCTL(ipv6, in6p, sopt)(*(ipv6_ipsec_support)->methods->pcbctl)(in6p, sopt);
			break;
		}
		/* FALLTHROUGH */
1911#endif /* IPSEC */

	default:
		error = ENOPROTOOPT42;
		break;
	}
	break;

case SOPT_GET:
	switch (optname) {
4
←
Control jumps to 'case 46:'  at line 2124→

	case IPV6_2292PKTOPTIONS25:
1923#ifdef IPV6_PKTOPTIONS
	case IPV6_PKTOPTIONS:
1925#endif
		/*
		 * RFC3542 (effectively) deprecated the
		 * semantics of the 2292-style pktoptions.
		 * Since it was not reliable in nature (i.e.,
		 * applications had to expect the lack of some
		 * information after all), it would make sense
		 * to simplify this part by always returning
		 * empty data.
		 */
		sopt->sopt_valsize = 0;
		break;

	case IPV6_RECVHOPOPTS39:
	case IPV6_RECVDSTOPTS40:
	case IPV6_RECVRTHDRDSTOPTS41:
	case IPV6_UNICAST_HOPS4:
	case IPV6_RECVPKTINFO36:
	case IPV6_RECVHOPLIMIT37:
	case IPV6_RECVRTHDR38:
	case IPV6_RECVPATHMTU43:

	case IPV6_V6ONLY27:
	case IPV6_PORTRANGE14:
	case IPV6_RECVTCLASS57:
	case IPV6_AUTOFLOWLABEL59:
	case IPV6_BINDANY64:
	case IPV6_FLOWID67:
	case IPV6_FLOWTYPE68:
	case IPV6_RECVFLOWID70:
1955#ifdef	RSS
	case IPV6_RSSBUCKETID69:
	case IPV6_RECVRSSBUCKETID71:
1958#endif
	case IPV6_BINDMULTI65:
		switch (optname) {

		case IPV6_RECVHOPOPTS39:
			optval = OPTBIT(IN6P_HOPOPTS)(in6p->inp_flags & (0x00040000) ? 1 : 0);
			break;

		case IPV6_RECVDSTOPTS40:
			optval = OPTBIT(IN6P_DSTOPTS)(in6p->inp_flags & (0x00080000) ? 1 : 0);
			break;

		case IPV6_RECVRTHDRDSTOPTS41:
			optval = OPTBIT(IN6P_RTHDRDSTOPTS)(in6p->inp_flags & (0x00200000) ? 1 : 0);
			break;

		case IPV6_UNICAST_HOPS4:
			optval = in6p->in6p_hops;
			break;

		case IPV6_RECVPKTINFO36:
			optval = OPTBIT(IN6P_PKTINFO)(in6p->inp_flags & (0x00010000) ? 1 : 0);
			break;

		case IPV6_RECVHOPLIMIT37:
			optval = OPTBIT(IN6P_HOPLIMIT)(in6p->inp_flags & (0x00020000) ? 1 : 0);
			break;

		case IPV6_RECVRTHDR38:
			optval = OPTBIT(IN6P_RTHDR)(in6p->inp_flags & (0x00100000) ? 1 : 0);
			break;

		case IPV6_RECVPATHMTU43:
			optval = OPTBIT(IN6P_MTU)(in6p->inp_flags & (0x80000000) ? 1 : 0);
			break;

		case IPV6_V6ONLY27:
			optval = OPTBIT(IN6P_IPV6_V6ONLY)(in6p->inp_flags & (0x00008000) ? 1 : 0);
			break;

		case IPV6_PORTRANGE14:
		    {
			int flags;
			flags = in6p->inp_flags;
			if (flags & INP_HIGHPORT0x00000010)
				optval = IPV6_PORTRANGE_HIGH1;
			else if (flags & INP_LOWPORT0x00000020)
				optval = IPV6_PORTRANGE_LOW2;
			else
				optval = 0;
			break;
		    }
		case IPV6_RECVTCLASS57:
			optval = OPTBIT(IN6P_TCLASS)(in6p->inp_flags & (0x00400000) ? 1 : 0);
			break;

		case IPV6_AUTOFLOWLABEL59:
			optval = OPTBIT(IN6P_AUTOFLOWLABEL)(in6p->inp_flags & (0x00800000) ? 1 : 0);
			break;

		case IPV6_ORIGDSTADDR72:
			optval = OPTBIT2(INP_ORIGDSTADDR)(in6p->inp_flags2 & (0x00000800) ? 1 : 0);
			break;

		case IPV6_BINDANY64:
			optval = OPTBIT(INP_BINDANY)(in6p->inp_flags & (0x00001000) ? 1 : 0);
			break;

		case IPV6_FLOWID67:
			optval = in6p->inp_flowid;
			break;

		case IPV6_FLOWTYPE68:
			optval = in6p->inp_flowtype;
			break;

		case IPV6_RECVFLOWID70:
			optval = OPTBIT2(INP_RECVFLOWID)(in6p->inp_flags2 & (0x00000100) ? 1 : 0);
			break;
2037#ifdef	RSS
		case IPV6_RSSBUCKETID69:
			retval =
			    rss_hash2bucket(in6p->inp_flowid,
			    in6p->inp_flowtype,
			    &rss_bucket);
			if (retval == 0)
				optval = rss_bucket;
			else
				error = EINVAL22;
			break;

		case IPV6_RECVRSSBUCKETID71:
			optval = OPTBIT2(INP_RECVRSSBUCKETID)(in6p->inp_flags2 & (0x00000200) ? 1 : 0);
			break;
2052#endif

		case IPV6_BINDMULTI65:
			optval = OPTBIT2(INP_BINDMULTI)(in6p->inp_flags2 & (0x00000040) ? 1 : 0);
			break;

		}
		if (error)
			break;
		error = sooptcopyout(sopt, &optval,
			sizeof optval);
		break;

	case IPV6_PATHMTU44:
	{
		u_long pmtu = 0;
		struct ip6_mtuinfo mtuinfo;
		struct in6_addr addr;

		if (!(so->so_state & SS_ISCONNECTED0x0002))
			return (ENOTCONN57);
		/*
		 * XXX: we dot not consider the case of source
		 * routing, or optional information to specify
		 * the outgoing interface.
		 * Copy faddr out of in6p to avoid holding lock
		 * on inp during route lookup.
		 */
		INP_RLOCK(in6p)__rw_rlock(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2080);
		bcopy(&in6p->in6p_faddr, &addr, sizeof(addr))__builtin_memmove((&addr), (&in6p->inp_inc.inc_ie.
ie_dependfaddr.id6_addr), (sizeof(addr)));
		INP_RUNLOCK(in6p)_rw_runlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 2082);
		error = ip6_getpmtu_ctl(so->so_fibnum,
		    &addr, &pmtu);
		if (error)
			break;
		if (pmtu > IPV6_MAXPACKET65535)
			pmtu = IPV6_MAXPACKET65535;

		bzero(&mtuinfo, sizeof(mtuinfo))__builtin_memset((&mtuinfo), 0, (sizeof(mtuinfo)));
		mtuinfo.ip6m_mtu = (u_int32_t)pmtu;
		optdata = (void *)&mtuinfo;
		optdatalen = sizeof(mtuinfo);
		error = sooptcopyout(sopt, optdata,
		    optdatalen);
		break;
	}

	case IPV6_2292PKTINFO19:
	case IPV6_2292HOPLIMIT20:
	case IPV6_2292HOPOPTS22:
	case IPV6_2292RTHDR24:
	case IPV6_2292DSTOPTS23:
		switch (optname) {
		case IPV6_2292PKTINFO19:
			optval = OPTBIT(IN6P_PKTINFO)(in6p->inp_flags & (0x00010000) ? 1 : 0);
			break;
		case IPV6_2292HOPLIMIT20:
			optval = OPTBIT(IN6P_HOPLIMIT)(in6p->inp_flags & (0x00020000) ? 1 : 0);
			break;
		case IPV6_2292HOPOPTS22:
			optval = OPTBIT(IN6P_HOPOPTS)(in6p->inp_flags & (0x00040000) ? 1 : 0);
			break;
		case IPV6_2292RTHDR24:
			optval = OPTBIT(IN6P_RTHDR)(in6p->inp_flags & (0x00100000) ? 1 : 0);
			break;
		case IPV6_2292DSTOPTS23:
			optval = OPTBIT(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS)(in6p->inp_flags & (0x00080000|0x00200000) ? 1 : 0);
			break;
		}
		error = sooptcopyout(sopt, &optval,
		    sizeof optval);
		break;
	case IPV6_PKTINFO46:
	case IPV6_HOPOPTS49:
	case IPV6_RTHDR51:
	case IPV6_DSTOPTS50:
	case IPV6_RTHDRDSTOPTS35:
	case IPV6_NEXTHOP48:
	case IPV6_TCLASS61:
	case IPV6_DONTFRAG62:
	case IPV6_USE_MIN_MTU42:
	case IPV6_PREFER_TEMPADDR63:
		error = ip6_getpcbopt(in6p, optname, sopt);
5
←
Calling 'ip6_getpcbopt'→
		break;

	case IPV6_MULTICAST_IF9:
	case IPV6_MULTICAST_HOPS10:
	case IPV6_MULTICAST_LOOP11:
	case IPV6_MSFILTER74:
		error = ip6_getmoptions(in6p, sopt);
		break;

2144#if defined(IPSEC1) || defined(IPSEC_SUPPORT1)
	case IPV6_IPSEC_POLICY28:
		if (IPSEC_ENABLED(ipv6)((ipv6_ipsec_support)->enabled & 0x0001)) {
			error = IPSEC_PCBCTL(ipv6, in6p, sopt)(*(ipv6_ipsec_support)->methods->pcbctl)(in6p, sopt);
			break;
		}
		/* FALLTHROUGH */
2151#endif /* IPSEC */
	default:
		error = ENOPROTOOPT42;
		break;
	}
	break;
}
}
return (error);
2160}

2162int
2163ip6_raw_ctloutput(struct socket *so, struct sockopt *sopt)
2164{
int error = 0, optval, optlen;
const int icmp6off = offsetof(struct icmp6_hdr, icmp6_cksum)__builtin_offsetof(struct icmp6_hdr, icmp6_cksum);
struct inpcb *in6p = sotoinpcb(so)((struct inpcb *)(so)->so_pcb);
int level, op, optname;

level = sopt->sopt_level;
op = sopt->sopt_dir;
optname = sopt->sopt_name;
optlen = sopt->sopt_valsize;

if (level != IPPROTO_IPV641) {
return (EINVAL22);
}

switch (optname) {
case IPV6_CHECKSUM26:
/*
 * For ICMPv6 sockets, no modification allowed for checksum
 * offset, permit "no change" values to help existing apps.
 *
 * RFC3542 says: "An attempt to set IPV6_CHECKSUM
 * for an ICMPv6 socket will fail."
 * The current behavior does not meet RFC3542.
 */
switch (op) {
case SOPT_SET:
	if (optlen != sizeof(int)) {
		error = EINVAL22;
		break;
	}
	error = sooptcopyin(sopt, &optval, sizeof(optval),
			    sizeof(optval));
	if (error)
		break;
	if ((optval % 2) != 0) {
		/* the API assumes even offset values */
		error = EINVAL22;
	} else if (so->so_proto->pr_protocol ==
	    IPPROTO_ICMPV658) {
		if (optval != icmp6off)
			error = EINVAL22;
	} else
		in6p->in6p_cksum = optval;
	break;

case SOPT_GET:
	if (so->so_proto->pr_protocol == IPPROTO_ICMPV658)
		optval = icmp6off;
	else
		optval = in6p->in6p_cksum;

	error = sooptcopyout(sopt, &optval, sizeof(optval));
	break;

default:
	error = EINVAL22;
	break;
}
break;

default:
error = ENOPROTOOPT42;
break;
}

return (error);
2231}

2233/*
* Set up IP6 options in pcb for insertion in output packets or
* specifying behavior of outgoing packets.
*/
2237static int
2238ip6_pcbopts(struct ip6_pktopts **pktopt, struct mbuf *m,
  struct socket *so, struct sockopt *sopt)
2240{
struct ip6_pktopts *opt = *pktopt;
int error = 0;
struct thread *td = sopt->sopt_td;

/* turn off any old options. */
if (opt) {
2247#ifdef DIAGNOSTIC
if (opt->ip6po_pktinfo || opt->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop ||
    opt->ip6po_hbh || opt->ip6po_dest1 || opt->ip6po_dest2 ||
    opt->ip6po_rhinfo.ip6po_rhi_rthdr)
	printf("ip6_pcbopts: all specified options are cleared.\n");
2252#endif
ip6_clearpktopts(opt, -1);
} else
opt = malloc(sizeof(*opt), M_IP6OPT, M_WAITOK0x0002);
*pktopt = NULL((void *)0);

if (!m || m->m_len == 0) {
/*
 * Only turning off any previous options, regardless of
 * whether the opt is just created or given.
 */
free(opt, M_IP6OPT);
return (0);
}

/*  set options specified by user. */
if ((error = ip6_setpktopts(m, opt, NULL((void *)0), (td != NULL((void *)0)) ?
   td->td_ucred : NULL((void *)0), so->so_proto->pr_protocol)) != 0) {
ip6_clearpktopts(opt, -1); /* XXX: discard all options */
free(opt, M_IP6OPT);
return (error);
}
*pktopt = opt;
return (0);
2276}

2278/*
* initialize ip6_pktopts.  beware that there are non-zero default values in
* the struct.
*/
2282void
2283ip6_initpktopts(struct ip6_pktopts *opt)
2284{

bzero(opt, sizeof(*opt))__builtin_memset((opt), 0, (sizeof(*opt)));
opt->ip6po_hlim = -1;	/* -1 means default hop limit */
opt->ip6po_tclass = -1;	/* -1 means default traffic class */
opt->ip6po_minmtu = IP6PO_MINMTU_MCASTONLY-1;
opt->ip6po_prefer_tempaddr = IP6PO_TEMPADDR_SYSTEM-1;
2291}

2293static int
2294ip6_pcbopt(int optname, u_char *buf, int len, struct ip6_pktopts **pktopt,
  struct ucred *cred, int uproto)
2296{
struct ip6_pktopts *opt;

if (*pktopt == NULL((void *)0)) {
*pktopt = malloc(sizeof(struct ip6_pktopts), M_IP6OPT,
    M_NOWAIT0x0001);
if (*pktopt == NULL((void *)0))
	return (ENOBUFS55);
ip6_initpktopts(*pktopt);
}
opt = *pktopt;

return (ip6_setpktopt(optname, buf, len, opt, cred, 1, 0, uproto));
2309}

2311#define GET_PKTOPT_VAR(field, lenexpr)do { if (pktopt && pktopt->field) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2311); optdata = malloc(sopt->sopt_valsize, M_TEMP, 0x0002
); malloc_optdata = 1; __rw_rlock(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2311
); if (in6p->inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2311); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->field) { optdatalen
 = min(lenexpr, sopt->sopt_valsize); __builtin_memmove((optdata
), (&pktopt->field), (optdatalen)); } else { free(optdata
, M_TEMP); optdata = ((void *)0); malloc_optdata = 0; } } } while
(0) do {					\
if (pktopt && pktopt->field) {						\
INP_RUNLOCK(in6p)_rw_runlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 2313);						\
optdata = malloc(sopt->sopt_valsize, M_TEMP, M_WAITOK0x0002);		\
malloc_optdata = true1;						\
INP_RLOCK(in6p)__rw_rlock(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2316);						\
if (in6p->inp_flags & (INP_TIMEWAIT0x01000000 | INP_DROPPED0x04000000)) {		\
	INP_RUNLOCK(in6p)_rw_runlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 2318);					\
	free(optdata, M_TEMP);					\
	return (ECONNRESET54);					\
}								\
pktopt = in6p->in6p_outputopts;					\
if (pktopt && pktopt->field) {					\
	optdatalen = min(lenexpr, sopt->sopt_valsize);		\
	bcopy(&pktopt->field, optdata, optdatalen)__builtin_memmove((optdata), (&pktopt->field), (optdatalen
));		\
} else {							\
	free(optdata, M_TEMP);					\
	optdata = NULL((void *)0);						\
	malloc_optdata = false0;					\
}								\
}									\
2332} while(0)

2334#define GET_PKTOPT_EXT_HDR(field)do { if (pktopt && pktopt->field) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2334); optdata = malloc(sopt->sopt_valsize, M_TEMP, 0x0002
); malloc_optdata = 1; __rw_rlock(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2334
); if (in6p->inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2334); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->field) { optdatalen
 = min((((struct ip6_ext *)pktopt->field)->ip6e_len + 1
) << 3, sopt->sopt_valsize); __builtin_memmove((optdata
), (&pktopt->field), (optdatalen)); } else { free(optdata
, M_TEMP); optdata = ((void *)0); malloc_optdata = 0; } } } while
(0) GET_PKTOPT_VAR(field,				\do { if (pktopt && pktopt->field) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2335); optdata = malloc(sopt->sopt_valsize, M_TEMP, 0x0002
); malloc_optdata = 1; __rw_rlock(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2335
); if (in6p->inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2335); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->field) { optdatalen
 = min((((struct ip6_ext *)pktopt->field)->ip6e_len + 1
) << 3, sopt->sopt_valsize); __builtin_memmove((optdata
), (&pktopt->field), (optdatalen)); } else { free(optdata
, M_TEMP); optdata = ((void *)0); malloc_optdata = 0; } } } while
(0)
(((struct ip6_ext *)pktopt->field)->ip6e_len + 1) << 3)do { if (pktopt && pktopt->field) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2335); optdata = malloc(sopt->sopt_valsize, M_TEMP, 0x0002
); malloc_optdata = 1; __rw_rlock(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2335
); if (in6p->inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2335); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->field) { optdatalen
 = min((((struct ip6_ext *)pktopt->field)->ip6e_len + 1
) << 3, sopt->sopt_valsize); __builtin_memmove((optdata
), (&pktopt->field), (optdatalen)); } else { free(optdata
, M_TEMP); optdata = ((void *)0); malloc_optdata = 0; } } } while
(0)

2337#define GET_PKTOPT_SOCKADDR(field)do { if (pktopt && pktopt->field) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2337); optdata = malloc(sopt->sopt_valsize, M_TEMP, 0x0002
); malloc_optdata = 1; __rw_rlock(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2337
); if (in6p->inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2337); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->field) { optdatalen
 = min(pktopt->field->sa_len, sopt->sopt_valsize); __builtin_memmove
((optdata), (&pktopt->field), (optdatalen)); } else { free
(optdata, M_TEMP); optdata = ((void *)0); malloc_optdata = 0;
 } } } while(0) GET_PKTOPT_VAR(field,			\do { if (pktopt && pktopt->field) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2338); optdata = malloc(sopt->sopt_valsize, M_TEMP, 0x0002
); malloc_optdata = 1; __rw_rlock(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2338
); if (in6p->inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2338); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->field) { optdatalen
 = min(pktopt->field->sa_len, sopt->sopt_valsize); __builtin_memmove
((optdata), (&pktopt->field), (optdatalen)); } else { free
(optdata, M_TEMP); optdata = ((void *)0); malloc_optdata = 0;
 } } } while(0)
pktopt->field->sa_len)do { if (pktopt && pktopt->field) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2338); optdata = malloc(sopt->sopt_valsize, M_TEMP, 0x0002
); malloc_optdata = 1; __rw_rlock(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2338
); if (in6p->inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2338); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->field) { optdatalen
 = min(pktopt->field->sa_len, sopt->sopt_valsize); __builtin_memmove
((optdata), (&pktopt->field), (optdatalen)); } else { free
(optdata, M_TEMP); optdata = ((void *)0); malloc_optdata = 0;
 } } } while(0)

2340static int
2341ip6_getpcbopt(struct inpcb *in6p, int optname, struct sockopt *sopt)
2342{
void *optdata = NULL((void *)0);
bool malloc_optdata = false0;
int optdatalen = 0;
int error = 0;
struct in6_pktinfo null_pktinfo;
int deftclass = 0, on;
int defminmtu = IP6PO_MINMTU_MCASTONLY-1;
int defpreftemp = IP6PO_TEMPADDR_SYSTEM-1;
struct ip6_pktopts *pktopt;

INP_RLOCK(in6p)__rw_rlock(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2353);
pktopt = in6p->in6p_outputopts;

switch (optname) {
6
←
Control jumps to 'case 46:'  at line 2357→
case IPV6_PKTINFO46:
optdata = (void *)&null_pktinfo;
if (pktopt && pktopt->ip6po_pktinfo) {
7
←
Assuming 'pktopt' is non-null→
8
←
Assuming the condition is true→
9
←
Taking true branch→
	bcopy(pktopt->ip6po_pktinfo, &null_pktinfo,__builtin_memmove((&null_pktinfo), (pktopt->ip6po_pktinfo
), (sizeof(null_pktinfo)))
	    sizeof(null_pktinfo))__builtin_memmove((&null_pktinfo), (pktopt->ip6po_pktinfo
), (sizeof(null_pktinfo)));
	in6_clearscope(&null_pktinfo.ipi6_addr);
} else {
	/* XXX: we don't have to do this every time... */
	bzero(&null_pktinfo, sizeof(null_pktinfo))__builtin_memset((&null_pktinfo), 0, (sizeof(null_pktinfo
)));
}
optdatalen = sizeof(struct in6_pktinfo);
break;
10
←
 Execution continues on line 2417→
case IPV6_TCLASS61:
if (pktopt && pktopt->ip6po_tclass >= 0)
	deftclass = pktopt->ip6po_tclass;
optdata = (void *)&deftclass;
optdatalen = sizeof(int);
break;
case IPV6_HOPOPTS49:
GET_PKTOPT_EXT_HDR(ip6po_hbh)do { if (pktopt && pktopt->ip6po_hbh) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2376); optdata = malloc(sopt->sopt_valsize, M_TEMP, 0x0002
); malloc_optdata = 1; __rw_rlock(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2376
); if (in6p->inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2376); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->ip6po_hbh) {
 optdatalen = min((((struct ip6_ext *)pktopt->ip6po_hbh)->
ip6e_len + 1) << 3, sopt->sopt_valsize); __builtin_memmove
((optdata), (&pktopt->ip6po_hbh), (optdatalen)); } else
 { free(optdata, M_TEMP); optdata = ((void *)0); malloc_optdata
 = 0; } } } while(0);
break;
case IPV6_RTHDR51:
GET_PKTOPT_EXT_HDR(ip6po_rthdr)do { if (pktopt && pktopt->ip6po_rhinfo.ip6po_rhi_rthdr
) { _rw_runlock_cookie(&((&(in6p)->inp_lock))->
rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2379); optdata
 = malloc(sopt->sopt_valsize, M_TEMP, 0x0002); malloc_optdata
 = 1; __rw_rlock(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 2379); if (in6p->
inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2379); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->ip6po_rhinfo
.ip6po_rhi_rthdr) { optdatalen = min((((struct ip6_ext *)pktopt
->ip6po_rhinfo.ip6po_rhi_rthdr)->ip6e_len + 1) <<
 3, sopt->sopt_valsize); __builtin_memmove((optdata), (&
pktopt->ip6po_rhinfo.ip6po_rhi_rthdr), (optdatalen)); } else
 { free(optdata, M_TEMP); optdata = ((void *)0); malloc_optdata
 = 0; } } } while(0);
break;
case IPV6_RTHDRDSTOPTS35:
GET_PKTOPT_EXT_HDR(ip6po_dest1)do { if (pktopt && pktopt->ip6po_dest1) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2382); optdata = malloc(sopt->sopt_valsize, M_TEMP, 0x0002
); malloc_optdata = 1; __rw_rlock(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2382
); if (in6p->inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2382); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->ip6po_dest1
) { optdatalen = min((((struct ip6_ext *)pktopt->ip6po_dest1
)->ip6e_len + 1) << 3, sopt->sopt_valsize); __builtin_memmove
((optdata), (&pktopt->ip6po_dest1), (optdatalen)); } else
 { free(optdata, M_TEMP); optdata = ((void *)0); malloc_optdata
 = 0; } } } while(0);
break;
case IPV6_DSTOPTS50:
GET_PKTOPT_EXT_HDR(ip6po_dest2)do { if (pktopt && pktopt->ip6po_dest2) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2385); optdata = malloc(sopt->sopt_valsize, M_TEMP, 0x0002
); malloc_optdata = 1; __rw_rlock(&((&(in6p)->inp_lock
))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2385
); if (in6p->inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2385); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->ip6po_dest2
) { optdatalen = min((((struct ip6_ext *)pktopt->ip6po_dest2
)->ip6e_len + 1) << 3, sopt->sopt_valsize); __builtin_memmove
((optdata), (&pktopt->ip6po_dest2), (optdatalen)); } else
 { free(optdata, M_TEMP); optdata = ((void *)0); malloc_optdata
 = 0; } } } while(0);
break;
case IPV6_NEXTHOP48:
GET_PKTOPT_SOCKADDR(ip6po_nexthop)do { if (pktopt && pktopt->ip6po_nhinfo.ip6po_nhi_nexthop
) { _rw_runlock_cookie(&((&(in6p)->inp_lock))->
rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c", 2388); optdata
 = malloc(sopt->sopt_valsize, M_TEMP, 0x0002); malloc_optdata
 = 1; __rw_rlock(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 2388); if (in6p->
inp_flags & (0x01000000 | 0x04000000)) { _rw_runlock_cookie
(&((&(in6p)->inp_lock))->rw_lock, "/root/freebsd/sys/netinet6/ip6_output.c"
, 2388); free(optdata, M_TEMP); return (54); } pktopt = in6p->
in6p_outputopts; if (pktopt && pktopt->ip6po_nhinfo
.ip6po_nhi_nexthop) { optdatalen = min(pktopt->ip6po_nhinfo
.ip6po_nhi_nexthop->sa_len, sopt->sopt_valsize); __builtin_memmove
((optdata), (&pktopt->ip6po_nhinfo.ip6po_nhi_nexthop),
 (optdatalen)); } else { free(optdata, M_TEMP); optdata = ((void
 *)0); malloc_optdata = 0; } } } while(0);
break;
case IPV6_USE_MIN_MTU42:
if (pktopt)
	defminmtu = pktopt->ip6po_minmtu;
optdata = (void *)&defminmtu;
optdatalen = sizeof(int);
break;
case IPV6_DONTFRAG62:
if (pktopt && ((pktopt->ip6po_flags) & IP6PO_DONTFRAG0x04))
	on = 1;
else
	on = 0;
optdata = (void *)&on;
optdatalen = sizeof(on);
break;
case IPV6_PREFER_TEMPADDR63:
if (pktopt)
	defpreftemp = pktopt->ip6po_prefer_tempaddr;
optdata = (void *)&defpreftemp;
optdatalen = sizeof(int);
break;
default:		/* should not happen */
2411#ifdef DIAGNOSTIC
panic("ip6_getpcbopt: unexpected option\n");
2413#endif
INP_RUNLOCK(in6p)_rw_runlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 2414);
return (ENOPROTOOPT42);
}
INP_RUNLOCK(in6p)_rw_runlock_cookie(&((&(in6p)->inp_lock))->rw_lock
, "/root/freebsd/sys/netinet6/ip6_output.c", 2417);

error = sooptcopyout(sopt, optdata, optdatalen);
11
←
Copies out a struct with untouched element(s): ipi6_ifindex
if (malloc_optdata)
free(optdata, M_TEMP);

return (error);
2424}

2426void
2427ip6_clearpktopts(struct ip6_pktopts *pktopt, int optname)
2428{
if (pktopt == NULL((void *)0))
return;

if (optname == -1 || optname == IPV6_PKTINFO46) {
if (pktopt->ip6po_pktinfo)
	free(pktopt->ip6po_pktinfo, M_IP6OPT);
pktopt->ip6po_pktinfo = NULL((void *)0);
}
if (optname == -1 || optname == IPV6_HOPLIMIT47)
pktopt->ip6po_hlim = -1;
if (optname == -1 || optname == IPV6_TCLASS61)
pktopt->ip6po_tclass = -1;
if (optname == -1 || optname == IPV6_NEXTHOP48) {
if (pktopt->ip6po_nextrouteip6po_nhinfo.ip6po_nhi_route.ro_rt) {
	RTFREE(pktopt->ip6po_nextroute.ro_rt)do { __mtx_lock_flags(&((((&(pktopt->ip6po_nhinfo.
ip6po_nhi_route.ro_rt)->rt_mtx))))->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (2443)); do { if ((pktopt->ip6po_nhinfo.ip6po_nhi_route
.ro_rt)->rt_refcnt <= 1) rtfree(pktopt->ip6po_nhinfo
.ip6po_nhi_route.ro_rt); else { do { __mtx_assert(&(((&
(pktopt->ip6po_nhinfo.ip6po_nhi_route.ro_rt)->rt_mtx)))
->mtx_lock, ((0x00000004)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (2443)); do { if (__builtin_expect((!((pktopt->ip6po_nhinfo
.ip6po_nhi_route.ro_rt)->rt_refcnt > 0)), 0)) panic ("bogus refcnt %d"
, (pktopt->ip6po_nhinfo.ip6po_nhi_route.ro_rt)->rt_refcnt
); } while (0); (pktopt->ip6po_nhinfo.ip6po_nhi_route.ro_rt
)->rt_refcnt--; } while (0); __mtx_unlock_flags(&((((&
(pktopt->ip6po_nhinfo.ip6po_nhi_route.ro_rt)->rt_mtx)))
)->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (2443)); } pktopt->ip6po_nhinfo.ip6po_nhi_route.ro_rt =
 0; } while (0); } while (0);
	pktopt->ip6po_nextrouteip6po_nhinfo.ip6po_nhi_route.ro_rt = NULL((void *)0);
}
if (pktopt->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop)
	free(pktopt->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop, M_IP6OPT);
pktopt->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop = NULL((void *)0);
}
if (optname == -1 || optname == IPV6_HOPOPTS49) {
if (pktopt->ip6po_hbh)
	free(pktopt->ip6po_hbh, M_IP6OPT);
pktopt->ip6po_hbh = NULL((void *)0);
}
if (optname == -1 || optname == IPV6_RTHDRDSTOPTS35) {
if (pktopt->ip6po_dest1)
	free(pktopt->ip6po_dest1, M_IP6OPT);
pktopt->ip6po_dest1 = NULL((void *)0);
}
if (optname == -1 || optname == IPV6_RTHDR51) {
if (pktopt->ip6po_rhinfo.ip6po_rhi_rthdr)
	free(pktopt->ip6po_rhinfo.ip6po_rhi_rthdr, M_IP6OPT);
pktopt->ip6po_rhinfo.ip6po_rhi_rthdr = NULL((void *)0);
if (pktopt->ip6po_routeip6po_rhinfo.ip6po_rhi_route.ro_rt) {
	RTFREE(pktopt->ip6po_route.ro_rt)do { __mtx_lock_flags(&((((&(pktopt->ip6po_rhinfo.
ip6po_rhi_route.ro_rt)->rt_mtx))))->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (2465)); do { if ((pktopt->ip6po_rhinfo.ip6po_rhi_route
.ro_rt)->rt_refcnt <= 1) rtfree(pktopt->ip6po_rhinfo
.ip6po_rhi_route.ro_rt); else { do { __mtx_assert(&(((&
(pktopt->ip6po_rhinfo.ip6po_rhi_route.ro_rt)->rt_mtx)))
->mtx_lock, ((0x00000004)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (2465)); do { if (__builtin_expect((!((pktopt->ip6po_rhinfo
.ip6po_rhi_route.ro_rt)->rt_refcnt > 0)), 0)) panic ("bogus refcnt %d"
, (pktopt->ip6po_rhinfo.ip6po_rhi_route.ro_rt)->rt_refcnt
); } while (0); (pktopt->ip6po_rhinfo.ip6po_rhi_route.ro_rt
)->rt_refcnt--; } while (0); __mtx_unlock_flags(&((((&
(pktopt->ip6po_rhinfo.ip6po_rhi_route.ro_rt)->rt_mtx)))
)->mtx_lock, ((0)), ("/root/freebsd/sys/netinet6/ip6_output.c"
), (2465)); } pktopt->ip6po_rhinfo.ip6po_rhi_route.ro_rt =
 0; } while (0); } while (0);
	pktopt->ip6po_routeip6po_rhinfo.ip6po_rhi_route.ro_rt = NULL((void *)0);
}
}
if (optname == -1 || optname == IPV6_DSTOPTS50) {
if (pktopt->ip6po_dest2)
	free(pktopt->ip6po_dest2, M_IP6OPT);
pktopt->ip6po_dest2 = NULL((void *)0);
}
2474}

2476#define PKTOPT_EXTHDRCPY(type) \
2477do {\
if (src->type) {\
int hlen = (((struct ip6_ext *)src->type)->ip6e_len + 1) << 3;\
dst->type = malloc(hlen, M_IP6OPT, canwait);\
if (dst->type == NULL((void *)0))\
	goto bad;\
bcopy(src->type, dst->type, hlen)__builtin_memmove((dst->type), (src->type), (hlen));\
}\
2485} while (/*CONSTCOND*/ 0)

2487static int
2488copypktopts(struct ip6_pktopts *dst, struct ip6_pktopts *src, int canwait)
2489{
if (dst == NULL((void *)0) || src == NULL((void *)0))  {
printf("ip6_clearpktopts: invalid argument\n");
return (EINVAL22);
}

dst->ip6po_hlim = src->ip6po_hlim;
dst->ip6po_tclass = src->ip6po_tclass;
dst->ip6po_flags = src->ip6po_flags;
dst->ip6po_minmtu = src->ip6po_minmtu;
dst->ip6po_prefer_tempaddr = src->ip6po_prefer_tempaddr;
if (src->ip6po_pktinfo) {
dst->ip6po_pktinfo = malloc(sizeof(*dst->ip6po_pktinfo),
    M_IP6OPT, canwait);
if (dst->ip6po_pktinfo == NULL((void *)0))
	goto bad;
*dst->ip6po_pktinfo = *src->ip6po_pktinfo;
}
if (src->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop) {
dst->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop = malloc(src->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop->sa_len,
    M_IP6OPT, canwait);
if (dst->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop == NULL((void *)0))
	goto bad;
bcopy(src->ip6po_nexthop, dst->ip6po_nexthop,__builtin_memmove((dst->ip6po_nhinfo.ip6po_nhi_nexthop), (
src->ip6po_nhinfo.ip6po_nhi_nexthop), (src->ip6po_nhinfo
.ip6po_nhi_nexthop->sa_len))
    src->ip6po_nexthop->sa_len)__builtin_memmove((dst->ip6po_nhinfo.ip6po_nhi_nexthop), (
src->ip6po_nhinfo.ip6po_nhi_nexthop), (src->ip6po_nhinfo
.ip6po_nhi_nexthop->sa_len));
}
PKTOPT_EXTHDRCPY(ip6po_hbh);
PKTOPT_EXTHDRCPY(ip6po_dest1);
PKTOPT_EXTHDRCPY(ip6po_dest2);
PKTOPT_EXTHDRCPY(ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr); /* not copy the cached route */
return (0);

bad:
ip6_clearpktopts(dst, -1);
return (ENOBUFS55);
2524}
2525#undef PKTOPT_EXTHDRCPY

2527struct ip6_pktopts *
2528ip6_copypktopts(struct ip6_pktopts *src, int canwait)
2529{
int error;
struct ip6_pktopts *dst;

dst = malloc(sizeof(*dst), M_IP6OPT, canwait);
if (dst == NULL((void *)0))
return (NULL((void *)0));
ip6_initpktopts(dst);

if ((error = copypktopts(dst, src, canwait)) != 0) {
free(dst, M_IP6OPT);
return (NULL((void *)0));
}

return (dst);
2544}

2546void
2547ip6_freepcbopts(struct ip6_pktopts *pktopt)
2548{
if (pktopt == NULL((void *)0))
return;

ip6_clearpktopts(pktopt, -1);

free(pktopt, M_IP6OPT);
2555}

2557/*
* Set IPv6 outgoing packet options based on advanced API.
*/
2560int
2561ip6_setpktopts(struct mbuf *control, struct ip6_pktopts *opt,
  struct ip6_pktopts *stickyopt, struct ucred *cred, int uproto)
2563{
struct cmsghdr *cm = NULL((void *)0);

if (control == NULL((void *)0) || opt == NULL((void *)0))
return (EINVAL22);

ip6_initpktopts(opt);
if (stickyopt) {
int error;

/*
 * If stickyopt is provided, make a local copy of the options
 * for this particular packet, then override them by ancillary
 * objects.
 * XXX: copypktopts() does not copy the cached route to a next
 * hop (if any).  This is not very good in terms of efficiency,
 * but we can allow this since this option should be rarely
 * used.
 */
if ((error = copypktopts(opt, stickyopt, M_NOWAIT0x0001)) != 0)
	return (error);
}

/*
* XXX: Currently, we assume all the optional information is stored
* in a single mbuf.
*/
if (control->m_next)
return (EINVAL22);

for (; control->m_len > 0; control->m_data += CMSG_ALIGN(cm->cmsg_len)(((__uintptr_t)(cm->cmsg_len) + (sizeof(__register_t) - 1)
) & ~(sizeof(__register_t) - 1)),
   control->m_len -= CMSG_ALIGN(cm->cmsg_len)(((__uintptr_t)(cm->cmsg_len) + (sizeof(__register_t) - 1)
) & ~(sizeof(__register_t) - 1))) {
int error;

if (control->m_len < CMSG_LEN(0)((((__uintptr_t)(sizeof(struct cmsghdr)) + (sizeof(__register_t
) - 1)) & ~(sizeof(__register_t) - 1)) + (0)))
	return (EINVAL22);

cm = mtod(control, struct cmsghdr *)((struct cmsghdr *)((control)->m_data));
if (cm->cmsg_len == 0 || cm->cmsg_len > control->m_len)
	return (EINVAL22);
if (cm->cmsg_level != IPPROTO_IPV641)
	continue;

error = ip6_setpktopt(cm->cmsg_type, CMSG_DATA(cm)((unsigned char *)(cm) + (((__uintptr_t)(sizeof(struct cmsghdr
)) + (sizeof(__register_t) - 1)) & ~(sizeof(__register_t)
 - 1))),
    cm->cmsg_len - CMSG_LEN(0)((((__uintptr_t)(sizeof(struct cmsghdr)) + (sizeof(__register_t
) - 1)) & ~(sizeof(__register_t) - 1)) + (0)), opt, cred, 0, 1, uproto);
if (error)
	return (error);
}

return (0);
2613}

2615/*
* Set a particular packet option, as a sticky option or an ancillary data
* item.  "len" can be 0 only when it's a sticky option.
* We have 4 cases of combination of "sticky" and "cmsg":
* "sticky=0, cmsg=0": impossible
* "sticky=0, cmsg=1": RFC2292 or RFC3542 ancillary data
* "sticky=1, cmsg=0": RFC3542 socket option
* "sticky=1, cmsg=1": RFC2292 socket option
*/
2624static int
2625ip6_setpktopt(int optname, u_char *buf, int len, struct ip6_pktopts *opt,
  struct ucred *cred, int sticky, int cmsg, int uproto)
2627{
int minmtupolicy, preftemp;
int error;

if (!sticky && !cmsg) {
2632#ifdef DIAGNOSTIC
printf("ip6_setpktopt: impossible case\n");
2634#endif
return (EINVAL22);
}

/*
* IPV6_2292xxx is for backward compatibility to RFC2292, and should
* not be specified in the context of RFC3542.  Conversely,
* RFC3542 types should not be specified in the context of RFC2292.
*/
if (!cmsg) {
switch (optname) {
case IPV6_2292PKTINFO19:
case IPV6_2292HOPLIMIT20:
case IPV6_2292NEXTHOP21:
case IPV6_2292HOPOPTS22:
case IPV6_2292DSTOPTS23:
case IPV6_2292RTHDR24:
case IPV6_2292PKTOPTIONS25:
	return (ENOPROTOOPT42);
}
}
if (sticky && cmsg) {
switch (optname) {
case IPV6_PKTINFO46:
case IPV6_HOPLIMIT47:
case IPV6_NEXTHOP48:
case IPV6_HOPOPTS49:
case IPV6_DSTOPTS50:
case IPV6_RTHDRDSTOPTS35:
case IPV6_RTHDR51:
case IPV6_USE_MIN_MTU42:
case IPV6_DONTFRAG62:
case IPV6_TCLASS61:
case IPV6_PREFER_TEMPADDR63: /* XXX: not an RFC3542 option */
	return (ENOPROTOOPT42);
}
}

switch (optname) {
case IPV6_2292PKTINFO19:
case IPV6_PKTINFO46:
{
struct ifnet *ifp = NULL((void *)0);
struct in6_pktinfo *pktinfo;

if (len != sizeof(struct in6_pktinfo))
	return (EINVAL22);

pktinfo = (struct in6_pktinfo *)buf;

/*
 * An application can clear any sticky IPV6_PKTINFO option by
 * doing a "regular" setsockopt with ipi6_addr being
 * in6addr_any and ipi6_ifindex being zero.
 * [RFC 3542, Section 6]
 */
if (optname == IPV6_PKTINFO46 && opt->ip6po_pktinfo &&
    pktinfo->ipi6_ifindex == 0 &&
    IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)((&pktinfo->ipi6_addr)->__u6_addr.__u6_addr32[0] ==
&& (&pktinfo->ipi6_addr)->__u6_addr.__u6_addr32
[1] == 0 && (&pktinfo->ipi6_addr)->__u6_addr
.__u6_addr32[2] == 0 && (&pktinfo->ipi6_addr)->
__u6_addr.__u6_addr32[3] == 0)) {
	ip6_clearpktopts(opt, optname);
	break;
}

if (uproto == IPPROTO_TCP6 && optname == IPV6_PKTINFO46 &&
    sticky && !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)((&pktinfo->ipi6_addr)->__u6_addr.__u6_addr32[0] ==
&& (&pktinfo->ipi6_addr)->__u6_addr.__u6_addr32
[1] == 0 && (&pktinfo->ipi6_addr)->__u6_addr
.__u6_addr32[2] == 0 && (&pktinfo->ipi6_addr)->
__u6_addr.__u6_addr32[3] == 0)) {
	return (EINVAL22);
}
if (IN6_IS_ADDR_MULTICAST(&pktinfo->ipi6_addr)((&pktinfo->ipi6_addr)->__u6_addr.__u6_addr8[0] == 0xff
))
	return (EINVAL22);
/* validate the interface index if specified. */
if (pktinfo->ipi6_ifindex > V_if_index(*(__typeof(vnet_entry_if_index)*) (((((__curthread())->td_vnet
))->vnet_data_base) + (uintptr_t)&vnet_entry_if_index)
))
	 return (ENXIO6);
if (pktinfo->ipi6_ifindex) {
	ifp = ifnet_byindex(pktinfo->ipi6_ifindex);
	if (ifp == NULL((void *)0))
		return (ENXIO6);
}
if (ifp != NULL((void *)0) && (ifp->if_afdata[AF_INET628] == NULL((void *)0) ||
    (ND_IFINFO(ifp)(((struct in6_ifextra *)(ifp)->if_afdata[28])->nd_ifinfo
)->flags & ND6_IFF_IFDISABLED0x8) != 0))
	return (ENETDOWN50);

if (ifp != NULL((void *)0) &&
    !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)((&pktinfo->ipi6_addr)->__u6_addr.__u6_addr32[0] ==
&& (&pktinfo->ipi6_addr)->__u6_addr.__u6_addr32
[1] == 0 && (&pktinfo->ipi6_addr)->__u6_addr
.__u6_addr32[2] == 0 && (&pktinfo->ipi6_addr)->
__u6_addr.__u6_addr32[3] == 0)) {
	struct in6_ifaddr *ia;

	in6_setscope(&pktinfo->ipi6_addr, ifp, NULL((void *)0));
	ia = in6ifa_ifpwithaddr(ifp, &pktinfo->ipi6_addr);
	if (ia == NULL((void *)0))
		return (EADDRNOTAVAIL49);
	ifa_free(&ia->ia_ifa);
}
/*
 * We store the address anyway, and let in6_selectsrc()
 * validate the specified address.  This is because ipi6_addr
 * may not have enough information about its scope zone, and
 * we may need additional information (such as outgoing
 * interface or the scope zone of a destination address) to
 * disambiguate the scope.
 * XXX: the delay of the validation may confuse the
 * application when it is used as a sticky option.
 */
if (opt->ip6po_pktinfo == NULL((void *)0)) {
	opt->ip6po_pktinfo = malloc(sizeof(*pktinfo),
	    M_IP6OPT, M_NOWAIT0x0001);
	if (opt->ip6po_pktinfo == NULL((void *)0))
		return (ENOBUFS55);
}
bcopy(pktinfo, opt->ip6po_pktinfo, sizeof(*pktinfo))__builtin_memmove((opt->ip6po_pktinfo), (pktinfo), (sizeof
(*pktinfo)));
break;
}

case IPV6_2292HOPLIMIT20:
case IPV6_HOPLIMIT47:
{
int *hlimp;

/*
 * RFC 3542 deprecated the usage of sticky IPV6_HOPLIMIT
 * to simplify the ordering among hoplimit options.
 */
if (optname == IPV6_HOPLIMIT47 && sticky)
	return (ENOPROTOOPT42);

if (len != sizeof(int))
	return (EINVAL22);
hlimp = (int *)buf;
if (*hlimp < -1 || *hlimp > 255)
	return (EINVAL22);

opt->ip6po_hlim = *hlimp;
break;
}

case IPV6_TCLASS61:
{
int tclass;

if (len != sizeof(int))
	return (EINVAL22);
tclass = *(int *)buf;
if (tclass < -1 || tclass > 255)
	return (EINVAL22);

opt->ip6po_tclass = tclass;
break;
}

case IPV6_2292NEXTHOP21:
case IPV6_NEXTHOP48:
if (cred != NULL((void *)0)) {
	error = priv_check_cred(cred, PRIV_NETINET_SETHDROPTS505);
	if (error)
		return (error);
}

if (len == 0) {	/* just remove the option */
	ip6_clearpktopts(opt, IPV6_NEXTHOP48);
	break;
}

/* check if cmsg_len is large enough for sa_len */
if (len < sizeof(struct sockaddr) || len < *buf)
	return (EINVAL22);

switch (((struct sockaddr *)buf)->sa_family) {
case AF_INET628:
{
	struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)buf;
	int error;

	if (sa6->sin6_len != sizeof(struct sockaddr_in6))
		return (EINVAL22);

	if (IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)((&sa6->sin6_addr)->__u6_addr.__u6_addr32[0] == 0 &&
 (&sa6->sin6_addr)->__u6_addr.__u6_addr32[1] == 0 &&
 (&sa6->sin6_addr)->__u6_addr.__u6_addr32[2] == 0 &&
 (&sa6->sin6_addr)->__u6_addr.__u6_addr32[3] == 0) ||
	    IN6_IS_ADDR_MULTICAST(&sa6->sin6_addr)((&sa6->sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff
)) {
		return (EINVAL22);
	}
	if ((error = sa6_embedscope(sa6, V_ip6_use_defzone(*(__typeof(vnet_entry_ip6_use_defzone)*) (((((__curthread())
->td_vnet))->vnet_data_base) + (uintptr_t)&vnet_entry_ip6_use_defzone
))))
	    != 0) {
		return (error);
	}
	break;
}
case AF_LINK18:	/* should eventually be supported */
default:
	return (EAFNOSUPPORT47);
}

/* turn off the previous option, then set the new option. */
ip6_clearpktopts(opt, IPV6_NEXTHOP48);
opt->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop = malloc(*buf, M_IP6OPT, M_NOWAIT0x0001);
if (opt->ip6po_nexthopip6po_nhinfo.ip6po_nhi_nexthop == NULL((void *)0))
	return (ENOBUFS55);
bcopy(buf, opt->ip6po_nexthop, *buf)__builtin_memmove((opt->ip6po_nhinfo.ip6po_nhi_nexthop), (
buf), (*buf));
break;

case IPV6_2292HOPOPTS22:
case IPV6_HOPOPTS49:
{
struct ip6_hbh *hbh;
int hbhlen;

/*
 * XXX: We don't allow a non-privileged user to set ANY HbH
 * options, since per-option restriction has too much
 * overhead.
 */
if (cred != NULL((void *)0)) {
	error = priv_check_cred(cred, PRIV_NETINET_SETHDROPTS505);
	if (error)
		return (error);
}

if (len == 0) {
	ip6_clearpktopts(opt, IPV6_HOPOPTS49);
	break;	/* just remove the option */
}

/* message length validation */
if (len < sizeof(struct ip6_hbh))
	return (EINVAL22);
hbh = (struct ip6_hbh *)buf;
hbhlen = (hbh->ip6h_len + 1) << 3;
if (len != hbhlen)
	return (EINVAL22);

/* turn off the previous option, then set the new option. */
ip6_clearpktopts(opt, IPV6_HOPOPTS49);
opt->ip6po_hbh = malloc(hbhlen, M_IP6OPT, M_NOWAIT0x0001);
if (opt->ip6po_hbh == NULL((void *)0))
	return (ENOBUFS55);
bcopy(hbh, opt->ip6po_hbh, hbhlen)__builtin_memmove((opt->ip6po_hbh), (hbh), (hbhlen));

break;
}

case IPV6_2292DSTOPTS23:
case IPV6_DSTOPTS50:
case IPV6_RTHDRDSTOPTS35:
{
struct ip6_dest *dest, **newdest = NULL((void *)0);
int destlen;

if (cred != NULL((void *)0)) { /* XXX: see the comment for IPV6_HOPOPTS */
	error = priv_check_cred(cred, PRIV_NETINET_SETHDROPTS505);
	if (error)
		return (error);
}

if (len == 0) {
	ip6_clearpktopts(opt, optname);
	break;	/* just remove the option */
}

/* message length validation */
if (len < sizeof(struct ip6_dest))
	return (EINVAL22);
dest = (struct ip6_dest *)buf;
destlen = (dest->ip6d_len + 1) << 3;
if (len != destlen)
	return (EINVAL22);

/*
 * Determine the position that the destination options header
 * should be inserted; before or after the routing header.
 */
switch (optname) {
case IPV6_2292DSTOPTS23:
	/*
	 * The old advacned API is ambiguous on this point.
	 * Our approach is to determine the position based
	 * according to the existence of a routing header.
	 * Note, however, that this depends on the order of the
	 * extension headers in the ancillary data; the 1st
	 * part of the destination options header must appear
	 * before the routing header in the ancillary data,
	 * too.
	 * RFC3542 solved the ambiguity by introducing
	 * separate ancillary data or option types.
	 */
	if (opt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr == NULL((void *)0))
		newdest = &opt->ip6po_dest1;
	else
		newdest = &opt->ip6po_dest2;
	break;
case IPV6_RTHDRDSTOPTS35:
	newdest = &opt->ip6po_dest1;
	break;
case IPV6_DSTOPTS50:
	newdest = &opt->ip6po_dest2;
	break;
}

/* turn off the previous option, then set the new option. */
ip6_clearpktopts(opt, optname);
*newdest = malloc(destlen, M_IP6OPT, M_NOWAIT0x0001);
if (*newdest == NULL((void *)0))
	return (ENOBUFS55);
bcopy(dest, *newdest, destlen)__builtin_memmove((*newdest), (dest), (destlen));

break;
}

case IPV6_2292RTHDR24:
case IPV6_RTHDR51:
{
struct ip6_rthdr *rth;
int rthlen;

if (len == 0) {
	ip6_clearpktopts(opt, IPV6_RTHDR51);
	break;	/* just remove the option */
}

/* message length validation */
if (len < sizeof(struct ip6_rthdr))
	return (EINVAL22);
rth = (struct ip6_rthdr *)buf;
rthlen = (rth->ip6r_len + 1) << 3;
if (len != rthlen)
	return (EINVAL22);

switch (rth->ip6r_type) {
case IPV6_RTHDR_TYPE_00:
	if (rth->ip6r_len == 0)	/* must contain one addr */
		return (EINVAL22);
	if (rth->ip6r_len % 2) /* length must be even */
		return (EINVAL22);
	if (rth->ip6r_len / 2 != rth->ip6r_segleft)
		return (EINVAL22);
	break;
default:
	return (EINVAL22);	/* not supported */
}

/* turn off the previous option */
ip6_clearpktopts(opt, IPV6_RTHDR51);
opt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr = malloc(rthlen, M_IP6OPT, M_NOWAIT0x0001);
if (opt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr == NULL((void *)0))
	return (ENOBUFS55);
bcopy(rth, opt->ip6po_rthdr, rthlen)__builtin_memmove((opt->ip6po_rhinfo.ip6po_rhi_rthdr), (rth
), (rthlen));

break;
}

case IPV6_USE_MIN_MTU42:
if (len != sizeof(int))
	return (EINVAL22);
minmtupolicy = *(int *)buf;
if (minmtupolicy != IP6PO_MINMTU_MCASTONLY-1 &&
    minmtupolicy != IP6PO_MINMTU_DISABLE0 &&
    minmtupolicy != IP6PO_MINMTU_ALL1) {
	return (EINVAL22);
}
opt->ip6po_minmtu = minmtupolicy;
break;

case IPV6_DONTFRAG62:
if (len != sizeof(int))
	return (EINVAL22);

if (uproto == IPPROTO_TCP6 || *(int *)buf == 0) {
	/*
	 * we ignore this option for TCP sockets.
	 * (RFC3542 leaves this case unspecified.)
	 */
	opt->ip6po_flags &= ~IP6PO_DONTFRAG0x04;
} else
	opt->ip6po_flags |= IP6PO_DONTFRAG0x04;
break;

case IPV6_PREFER_TEMPADDR63:
if (len != sizeof(int))
	return (EINVAL22);
preftemp = *(int *)buf;
if (preftemp != IP6PO_TEMPADDR_SYSTEM-1 &&
    preftemp != IP6PO_TEMPADDR_NOTPREFER0 &&
    preftemp != IP6PO_TEMPADDR_PREFER1) {
	return (EINVAL22);
}
opt->ip6po_prefer_tempaddr = preftemp;
break;

default:
return (ENOPROTOOPT42);
} /* end of switch */

return (0);
3022}

3024/*
* Routine called from ip6_output() to loop back a copy of an IP6 multicast
* packet to the input queue of a specified interface.  Note that this
* calls the output routine of the loopback "driver", but with an interface
* pointer that might NOT be &loif -- easier than replicating that code here.
*/
3030void
3031ip6_mloopback(struct ifnet *ifp, struct mbuf *m)
3032{
struct mbuf *copym;
struct ip6_hdr *ip6;

copym = m_copym(m, 0, M_COPYALL1000000000, M_NOWAIT0x0001);
if (copym == NULL((void *)0))
return;

/*
* Make sure to deep-copy IPv6 header portion in case the data
* is in an mbuf cluster, so that we can safely override the IPv6
* header portion later.
*/
if (!M_WRITABLE(copym)(!((copym)->m_flags & 0x00000008) && (!(((copym
)->m_flags & 0x00000001)) || (m_extrefcnt(copym) == 1)
)) ||
   copym->m_len < sizeof(struct ip6_hdr)) {
copym = m_pullup(copym, sizeof(struct ip6_hdr));
if (copym == NULL((void *)0))
	return;
}
ip6 = mtod(copym, struct ip6_hdr *)((struct ip6_hdr *)((copym)->m_data));
/*
* clear embedded scope identifiers if necessary.
* in6_clearscope will touch the addresses only when necessary.
*/
in6_clearscope(&ip6->ip6_src);
in6_clearscope(&ip6->ip6_dst);
if (copym->m_pkthdr.csum_flags & CSUM_DELAY_DATA_IPV6(0x00000400|0x00000200)) {
copym->m_pkthdr.csum_flags |= CSUM_DATA_VALID_IPV60x08000000 |
    CSUM_PSEUDO_HDR0x04000000;
copym->m_pkthdr.csum_dataPH_per.thirtytwo[1] = 0xffff;
}
if_simloop(ifp, copym, AF_INET628, 0);
3064}

3066/*
* Chop IPv6 header off from the payload.
*/
3069static int
3070ip6_splithdr(struct mbuf *m, struct ip6_exthdrs *exthdrs)
3071{
struct mbuf *mh;
struct ip6_hdr *ip6;

ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_data));
if (m->m_len > sizeof(*ip6)) {
mh = m_gethdr(M_NOWAIT0x0001, MT_DATA1);
if (mh == NULL((void *)0)) {
	m_freem(m);
	return ENOBUFS55;
}
m_move_pkthdr(mh, m);
M_ALIGN(mh, sizeof(*ip6))m_align(mh, sizeof(*ip6));
m->m_len -= sizeof(*ip6);
m->m_data += sizeof(*ip6);
mh->m_next = m;
m = mh;
m->m_len = sizeof(*ip6);
bcopy((caddr_t)ip6, mtod(m, caddr_t), sizeof(*ip6))__builtin_memmove((((caddr_t)((m)->m_data))), ((caddr_t)ip6
), (sizeof(*ip6)));
}
exthdrs->ip6e_ip6 = m;
return 0;
3093}

3095/*
* Compute IPv6 extension header length.
*/
3098int
3099ip6_optlen(struct inpcb *in6p)
3100{
int len;

if (!in6p->in6p_outputopts)
return 0;

len = 0;
3107#define elen(x) \
  (((struct ip6_ext *)(x)) ? (((struct ip6_ext *)(x))->ip6e_len + 1) << 3 : 0)

len += elen(in6p->in6p_outputopts->ip6po_hbh);
if (in6p->in6p_outputopts->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr)
/* dest1 is valid with rthdr only */
len += elen(in6p->in6p_outputopts->ip6po_dest1);
len += elen(in6p->in6p_outputopts->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr);
len += elen(in6p->in6p_outputopts->ip6po_dest2);
return len;
3117#undef elen
3118}