PSARC/2009/331 IP Datapath Refactoring

PSARC/2008/522 EOF of 2001/070 IPsec HW Acceleration support
PSARC/2009/495 netstat -r flags for blackhole and reject routes
PSARC 2009/496 EOF of XRESOLV
PSARC/2009/494 IP_DONTFRAG socket option
PSARC/2009/515 fragmentation controls for ping and traceroute
6798716 ip_newroute delenda est
6798739 ARP and IP are too separate
6807265 IPv4 ip2mac() support
6756382 Please remove Venus IPsec HWACCEL code
6880632 sendto/sendmsg never returns EHOSTUNREACH in Solaris
6748582 sendmsg() return OK, but doesn't send message using IPv4-mapped x IPv6 addr
1119790 TCP and path mtu discovery
4637227 should support equal-cost multi-path (ECMP)
5078568 getsockopt() for IPV6_PATHMTU on a non-connected socket should not succeed
6419648 "AR* contract private note" should be removed as part of ATM SW EOL
6274715 Arp could keep the old entry in the cache while it waits for an arp response
6605615 Remove duplicated TCP/IP opt_set/opt_get code; use conn_t
6874677 IP_TTL can be used to send with ttl zero
4034090 arp should not let you delete your own entry
6882140 Implement IP_DONTFRAG socket option
6883858 Implement ping -D option; traceroute -F should work for IPv6 and shared-IP zones
1119792 TCP/IP black hole detection is broken on receiver
4078796 Directed broadcast forwarding code has problems
4104337 restrict the IPPROTO_IP and IPPROTO_IPV6 options based on the socket family
4203747 Source address selection for source routed packets
4230259 pmtu is increased every ip_ire_pathmtu_interval timer value.
4300533 When sticky option ipv6_pktinfo set to bogus address subsequent connect time out
4471035 ire_delete_cache_gw is called through ire_walk unnecessarily
4514572 SO_DONTROUTE socket option doesn't work with IPv6
4524980 tcp_lookup_ipv4() should compare the ifindex against tcpb->tcpb_bound_if
4532714 machine fails to switch quickly among failed default routes
4634219 IPv6 path mtu discovery is broken when using routing header
4691581 udp broadcast handling causes too many replicas
4708405 mcast is broken on machines when all interfaces are IFF_POINTOPOINT
4770457 netstat/route: source address of interface routes pretends to be gateway address
4786974 use routing table to determine routes/interface for multicast
4792619 An ip_fanout_udp_ipc_v6() routine might lead to some simpler code
4816115 Nuke ipsec_out_use_global_policy
4862844 ipsec offload corner case
4867533 tcp_rq and tcp_wq are redundant
4868589 NCEs should be shared across an IPMP group
4872093 unplumbing an improper virtual interface panics in ip_newroute_get_dst_ill()
4901671 FireEngine needs some cleanup
4907617 IPsec identity latching should be done before sending SYN-ACK
4941461 scopeid and IPV6_PKTINFO with UDP/ICMP connect() does not work properly
4944981 ip does nothing with IP6I_NEXTHOP
4963353 IPv4 and IPv6 proto fanout codes could be brought closer
4963360 consider passing zoneid using ip6i_t instead of ipsec_out_t in NDP
4963734 new ip6_asp locking is used incorrectly in ip_newroute_v6()
5008315 IPv6 code passes ip6i_t to IPsec code instead of ip6_t
5009636 memory leak in ip_fanout_proto_v6()
5092337 tcp/udp option handling can use some cleanup
5035841 Solaris can fail to create a valid broadcast ire
5043747 ar_query_xmit: Could not find the ace
5051574 tcp_check_policy is missing some checks
6305037 full hardware checksum is discarded when there're more than 2 mblks in the chain
6311149 ip.c needs to be put through a woodchipper
4708860 Unable to reassemble CGTP fragmented multicast packets
6224628 Large IPv6 packets with IPsec protection sometimes have length mismatch.
6213243 Solaris does not currently support Dead Gateway Detection
5029091 duplicate code in IP's input path for TCP/UDP/SCTP
4674643 through IPv6 CGTP routes, the very first packet is sent only after a while
6207318 Multiple default routes do not round robin connections to routers.
4823410 IP has an inconsistent view of link mtu
5105520 adding interface route to down interface causes ifconfig hang
5105707 advanced sockets API introduced some dead code
6318399 IP option handling for icmp and udp is too complicated
6321434 Every dropped packet in IP should use ip_drop_packet()
6341693 ifconfig mtu should operate on the physical interface, not individual ipif's
6352430 The credentials attached to an mblk are not particularly useful
6357894 uninitialised ipp_hoplimit needs to be cleaned up.
6363568 ip_xmit_v6() may be missing IRE releases in error cases
6364828 ip_rput_forward needs a makeover
6384416 System panics when running as multicast forwarder using multicast tunnels
6402382 TX: UDP v6 slowpath is not modified to handle mac_exempt conns
6418413 assertion failed ipha->ipha_ident == 0||ipha->ipha_ident == 0xFFFF
6420916 assertion failures in ipv6 wput path
6430851 use of b_prev to store ifindex is not 100% safe
6446106 IPv6 packets stored in nce->nce_qd_mp will be sent with incorrect tcp/udp checksums
6453711 SCTP OOTB sent as if genetated by global zone
6465212 ARP/IP merge should remove ire_freemblk.esballoc
6490163 ip_input() could misbehave if the first mblk's size is not big enough
6496664 missing ipif_refrele leads to reference leak and deferred crash in ip_wput_ipsec_out_v6
6504856 memory leak in ip_fanout_proto_v6() when using link local outer tunnel addresses
6507765 IRE cache hash function performs badly
6510186 IP_FORWARD_PROG bit is easily overlooked
6514727 cgtp ipv6 failure on snv54
6528286 MULTIRT (CGTP) should offload checksum to hardware
6533904 SCTP: doesn't support traffic class for IPv6
6539415 TX: ipif source selection is flawed for unlabeled gateways
6539851 plumbed unworking nic blocks sending broadcast packets
6564468 non-solaris SCTP stack over rawip socket: netstat command counts rawipInData not rawipOutDatagrams
6568511 ipIfStatsOutDiscards not bumped when discarding an ipsec packet on the wrong NIC
6584162 tcp_g_q_inactive() makes incorrect use of taskq_dispatch()
6603974 round-robin default with many interfaces causes infinite temporary IRE thrashing
6611750 ilm_lookup_ill_index_v4 was born an orphan
6618423 ip_wput_frag_mdt sends out packets that void pfhooks
6620964 IRE max bucket count calculations performed in ip_ire_init() are flawed
6626266 various _broadcasts seem redundant
6638182 IP_PKTINFO + SO_DONTROUTE + CIPSO IP option == panic
6647710 IPv6 possible DoS vulnerability
6657357 nce should be kmem_cache alloc'ed from an nce_cache.
6685131 ilg_add -> conn_ilg_alloc interacting with conn_ilg[] walkers can cause panic.
6730298 adding 0.0.0.0 key with mask != 0 causes  'route delete default' to fail
6730976 vni and ipv6 doesn't quite work.
6740956 assertion failed: mp->b_next == 0L && mp->b_prev == 0L in nce_queue_mp_common()
6748515 BUMP_MIB() is occasionally done on the wrong ill
6753250 ip_output_v6() `notv6' error path has an errant ill_refrele()
6756411 NULL-pointer dereference in ip_wput_local()
6769582 IP must forward packet returned from FW-HOOK
6781525 bogus usesrc usage leads directly to panic
6422839 System paniced in ip_multicast_loopback due to NULL pointer dereference
6785521 initial IPv6 DAD solicitation is dropped in ip_newroute_ipif_v6()
6787370 ipnet devices not seeing forwarded IP packets on outgoing interface
6791187 ip*dbg() calls in ip_output_options() claim to originate from ip_wput()
6794047 nce_fp_mp prevents sharing of NCEs across an IPMP group
6797926 many unnecessary ip0dbg() in ip_rput_data_v6
6846919 Packet queued for ND gets sent in the clear.
6856591 ping doesn't send packets with DF set
6861113 arp module has incorrect dependency path for hook module
6865664 IPV6_NEXTHOP does not work with TCP socket
6874681 No ICMP time exceeded when a router receives packet with ttl = 0
6880977 ip_wput_ire() uses over 1k of stack
6595433 IPsec performance could be significantly better when calling hw crypto provider synchronously
6848397 ifconfig down of an interface can hang.
6849602 IPV6_PATHMTU size issue for UDP
6885359 Add compile-time option for testing pure IPsec overhead
6889268 Odd loopback source address selection with IPMP
6895420 assertion failed: connp->conn_helper_info == NULL
6851189 Routing-related panic occurred during reboot on T2000 system running snv_117
6896174 Post-async-encryption, AH+ESP packets may have misinitialized ipha/ip6
6896687 iptun presents IPv6 with an MTU < 1280
6897006 assertion failed: ipif->ipif_id != 0 in ip_sioctl_slifzone_restart

1 files changed, 47 insertions, 155 deletions

diff --git a/usr/src/uts/common/inet/ip6.h b/usr/src/uts/common/inet/ip6.h
index 5408ab9e55..10c6c81ba2 100644
--- a/usr/src/uts/common/inet/ip6.h
+++ b/usr/src/uts/common/inet/ip6.h
@@ -57,105 +57,12 @@ typedef enum {
 	IP6_SCOPE_GLOBAL
 } in6addr_scope_t;
 
-#ifdef	_KERNEL
+/* From RFC 3542 - setting for IPV6_USE_MIN_MTU socket option */
+#define	IPV6_USE_MIN_MTU_MULTICAST	-1	/* Default */
+#define	IPV6_USE_MIN_MTU_NEVER		0
+#define	IPV6_USE_MIN_MTU_ALWAYS		1
 
-/*
- * Private header used between the transports and IP to carry the content
- * of the options IPV6_PKTINFO/IPV6_RECVPKTINFO (the interface index only)
- * and IPV6_NEXTHOP.
- * Also used to specify that raw sockets do not want the UDP/TCP transport
- * checksums calculated in IP (akin to IP_HDR_INCLUDED) and provide for
- * IPV6_CHECKSUM on the transmit side (using ip6i_checksum_off).
- *
- * When this header is used it must be the first header in the packet i.e.
- * before the real ip6 header. The use of a next header value of 255
- * (IPPROTO_RAW) in this header indicates its presence. Note that
- * ip6_nxt = IPPROTO_RAW indicates that "this" header is ip6_info - the
- * next header is always IPv6.
- *
- * Note that ip6i_nexthop is at the same offset as ip6_dst so that
- * this header can be kept in the packet while the it passes through
- * ip_newroute* and the ndp code. Those routines will use ip6_dst for
- * resolution.
- *
- * Implementation offset assumptions about ip6_info_t and ip6_t fields
- * and their alignments shown in figure below
- *
- * ip6_info (Private headers from transports to IP) header below
- * _______________________________________________________________ _ _ _ _ _
- * | .... | ip6i_nxt (255)| ......................|ip6i_nexthop| ...ip6_t.
- * --------------------------------------------------------------- - - - - -
- *        ^                                       ^
- * <---- >| same offset for {ip6i_nxt,ip6_nxt}    ^
- *        ^                                       ^
- * <------^-------------------------------------->| same offset for
- *        ^                                       ^ {ip6i_nxthop,ip6_dst}
- * _______________________________________________________________ _ _ _
- * | .... | ip6_nxt       | ......................|ip6_dst     | .other hdrs...
- * --------------------------------------------------------------- - - -
- * ip6_t (IPv6 protocol) header above
- */
-struct ip6_info {
-	union {
-		struct ip6_info_ctl {
-			uint32_t	ip6i_un1_flow;
-			uint16_t	ip6i_un1_plen;   /* payload length */
-			uint8_t		ip6i_un1_nxt;    /* next header */
-			uint8_t		ip6i_un1_hlim;   /* hop limit */
-		} ip6i_un1;
-	} ip6i_ctlun;
-	int		ip6i_flags;	/* See below */
-	int		ip6i_ifindex;
-	int		ip6i_checksum_off;
-	int		ip6i_pad;
-	in6_addr_t	ip6i_nexthop;	/* Same offset as ip6_dst */
-};
-typedef struct ip6_info	ip6i_t;
-
-#define	ip6i_flow	ip6i_ctlun.ip6i_un1.ip6i_un1_flow
-#define	ip6i_vcf	ip6i_flow		/* Version, class, flow */
-#define	ip6i_nxt	ip6i_ctlun.ip6i_un1.ip6i_un1_nxt
-#define	ip6i_hops	ip6i_ctlun.ip6i_un1.ip6i_un1_hlim
-
-/* ip6_info flags */
-#define	IP6I_IFINDEX	0x1	/* ip6i_ifindex is set (to nonzero value) */
-#define	IP6I_NEXTHOP	0x2	/* ip6i_nexthop is different than ip6_dst */
-#define	IP6I_NO_ULP_CKSUM	0x4
-			/*
-			 * Do not generate TCP/UDP/SCTP transport checksum.
-			 * Used by raw sockets. Does not affect the
-			 * generation of transport checksums for ICMPv6
-			 * since such packets always arrive through
-			 * a raw socket.
-			 */
-#define	IP6I_UNSPEC_SRC	0x8
-			/* Used to carry conn_unspec_src through ip_newroute* */
-#define	IP6I_RAW_CHECKSUM	0x10
-			/* Compute checksum and stuff in ip6i_checksum_off */
-#define	IP6I_VERIFY_SRC	0x20	/* Verify ip6_src. Used when IPV6_PKTINFO */
-#define	IP6I_IPMP_PROBE	0x40	/* IPMP (in.mpathd) probe packet */
-				/* 0x80 - 0x100 available */
-#define	IP6I_DONTFRAG	0x200	/* Don't fragment this packet */
-#define	IP6I_HOPLIMIT	0x400	/* hoplimit has been set by the sender */
-
-/*
- * These constants refer to the IPV6_USE_MIN_MTU API.  The
- * actually values used in the API are these values shifted down
- * 10 bits minus 2 [-1, 1].  0 (-2 after conversion) is considered
- * the same as the default (-1).  IP6I_API_USE_MIN_MTU(f, x) returns
- * the flags field updated with min mtu.  IP6I_USE_MIN_MTU_API takes the
- * field and returns the API value (+ the -2 value).
- */
-#define	IP6I_USE_MIN_MTU_UNICAST	0x400
-#define	IP6I_USE_MIN_MTU_ALWAYS		0x800
-#define	IP6I_USE_MIN_MTU_NEVER		0xC00
-#define	IP6I_USE_MIN_MTU_API(x)		((((x) & 0xC00) >> 10) - 2)
-#define	IP6I_API_USE_MIN_MTU(f, x)	(((f) & ~0xC00) &\
-					((((x) + 2) & 0x3) << 11))
-#define	IPV6_USE_MIN_MTU_DEFAULT	-2
-#define	IPV6_USE_MIN_MTU_UNICAST	-1
-#define	IPV6_USE_MIN_MTU_ALWAYS		0
-#define	IPV6_USE_MIN_MTU_NEVER		1
+#ifdef	_KERNEL
 
 /* Extract the scope from a multicast address */
 #ifdef _BIG_ENDIAN
@@ -195,28 +102,18 @@ typedef struct ip6_info	ip6i_t;
 #define	MIN_EHDR_LEN		8
 #define	MAX_EHDR_LEN		2048
 
-/*
- * The high-order bit of the version field is used by the transports to
- * indicate a reachability confirmation to IP.
- */
-#define	IP_FORWARD_PROG_BIT		0x8
-
 #ifdef _BIG_ENDIAN
 #define	IPV6_DEFAULT_VERS_AND_FLOW	0x60000000
 #define	IPV6_VERS_AND_FLOW_MASK		0xF0000000
-#define	IP_FORWARD_PROG			((uint32_t)IP_FORWARD_PROG_BIT << 28)
 #define	V6_MCAST			0xFF000000
 #define	V6_LINKLOCAL			0xFE800000
 
 #define	IPV6_FLOW_TCLASS(x)		(((x) & IPV6_FLOWINFO_TCLASS) >> 20)
 #define	IPV6_TCLASS_FLOW(f, c)		(((f) & ~IPV6_FLOWINFO_TCLASS) |\
 					((c) << 20))
-
 #else
 #define	IPV6_DEFAULT_VERS_AND_FLOW	0x00000060
 #define	IPV6_VERS_AND_FLOW_MASK		0x000000F0
-#define	IP_FORWARD_PROG			((uint32_t)IP_FORWARD_PROG_BIT << 4)
-
 #define	V6_MCAST			0x000000FF
 #define	V6_LINKLOCAL			0x000080FE
 
@@ -328,71 +225,66 @@ extern const in6_addr_t	ipv6_unspecified_group;
  * FUNCTION PROTOTYPES
  */
 
-struct ipsec_out_s;
-
 extern void	convert2ascii(char *buf, const in6_addr_t *addr);
 extern char	*inet_ntop(int, const void *, char *, int);
 extern int	inet_pton(int, char *, void *);
-extern void	icmp_time_exceeded_v6(queue_t *, mblk_t *, uint8_t,
-    boolean_t, boolean_t, zoneid_t, ip_stack_t *);
-extern void	icmp_unreachable_v6(queue_t *, mblk_t *, uint8_t,
-    boolean_t, boolean_t, zoneid_t, ip_stack_t *);
-extern void	icmp_inbound_error_fanout_v6(queue_t *, mblk_t *, ip6_t *,
-    icmp6_t *, ill_t *, ill_t *, boolean_t, zoneid_t);
-extern boolean_t conn_wantpacket_v6(conn_t *, ill_t *, ip6_t *, int, zoneid_t);
-extern mblk_t	*ip_add_info_v6(mblk_t *, ill_t *, const in6_addr_t *);
+extern void	icmp_param_problem_nexthdr_v6(mblk_t *, boolean_t,
+    ip_recv_attr_t *);
+extern void	icmp_pkt2big_v6(mblk_t *, uint32_t, boolean_t,
+    ip_recv_attr_t *);
+extern void	icmp_time_exceeded_v6(mblk_t *, uint8_t, boolean_t,
+    ip_recv_attr_t *);
+extern void	icmp_unreachable_v6(mblk_t *, uint8_t, boolean_t,
+    ip_recv_attr_t *);
+extern mblk_t	*icmp_inbound_v6(mblk_t *, ip_recv_attr_t *);
+extern void	icmp_inbound_error_fanout_v6(mblk_t *, icmp6_t *,
+    ip_recv_attr_t *);
+extern void	icmp_update_out_mib_v6(ill_t *, icmp6_t *);
+
+extern boolean_t conn_wantpacket_v6(conn_t *, ip_recv_attr_t *, ip6_t *);
+
 extern in6addr_scope_t	ip_addr_scope_v6(const in6_addr_t *);
-extern mblk_t	*ip_bind_v6(queue_t *, mblk_t *, conn_t *, ip6_pkt_t *);
-extern void	ip_build_hdrs_v6(uchar_t *, uint_t, ip6_pkt_t *, uint8_t);
-extern int	ip_fanout_send_icmp_v6(queue_t *, mblk_t *, uint_t,
-    uint_t, uint8_t, uint_t, boolean_t, zoneid_t, ip_stack_t *);
-extern int	ip_find_hdr_v6(mblk_t *, ip6_t *, ip6_pkt_t *, uint8_t *);
-extern in6_addr_t ip_get_dst_v6(ip6_t *, mblk_t *, boolean_t *);
+extern void	ip_build_hdrs_v6(uchar_t *, uint_t, const ip_pkt_t *, uint8_t,
+    uint32_t);
+extern void	ip_fanout_udp_multi_v6(mblk_t *, ip6_t *, uint16_t, uint16_t,
+    ip_recv_attr_t *);
+extern void	ip_fanout_send_icmp_v6(mblk_t *, uint_t, uint8_t,
+    ip_recv_attr_t *);
+extern void	ip_fanout_proto_v6(mblk_t *, ip6_t *, ip_recv_attr_t *);
+extern int	ip_find_hdr_v6(mblk_t *, ip6_t *, boolean_t, ip_pkt_t *,
+    uint8_t *);
+extern in6_addr_t ip_get_dst_v6(ip6_t *, const mblk_t *, boolean_t *);
 extern ip6_rthdr_t	*ip_find_rthdr_v6(ip6_t *, uint8_t *);
-extern int	ip_hdr_complete_v6(ip6_t *, zoneid_t, ip_stack_t *);
 extern boolean_t	ip_hdr_length_nexthdr_v6(mblk_t *, ip6_t *,
     uint16_t *, uint8_t **);
 extern int	ip_hdr_length_v6(mblk_t *, ip6_t *);
-extern int	ip_check_v6_mblk(mblk_t *, ill_t *);
 extern uint32_t	ip_massage_options_v6(ip6_t *, ip6_rthdr_t *, netstack_t *);
-extern void	ip_wput_frag_v6(mblk_t *, ire_t *, uint_t, conn_t *, int, int);
-extern void 	ip_wput_ipsec_out_v6(queue_t *, mblk_t *, ip6_t *, ill_t *,
-    ire_t *);
-extern int	ip_total_hdrs_len_v6(ip6_pkt_t *);
+extern void	ip_forward_xmit_v6(nce_t *, mblk_t *, ip6_t *, ip_recv_attr_t *,
+    uint32_t, uint32_t);
+extern mblk_t	*ip_fraghdr_add_v6(mblk_t *, uint32_t, ip_xmit_attr_t *);
+extern int	ip_fragment_v6(mblk_t *, nce_t *, iaflags_t, uint_t, uint32_t,
+    uint32_t, zoneid_t, zoneid_t, pfirepostfrag_t postfragfn,
+    uintptr_t *ixa_cookie);
+extern int	ip_process_options_v6(mblk_t *, ip6_t *,
+    uint8_t *, uint_t, uint8_t, ip_recv_attr_t *);
+extern void	ip_process_rthdr(mblk_t *, ip6_t *, ip6_rthdr_t *,
+    ip_recv_attr_t *);
+extern int	ip_total_hdrs_len_v6(const ip_pkt_t *);
+extern mblk_t	*ipsec_early_ah_v6(mblk_t *, ip_recv_attr_t *);
 extern int	ipsec_ah_get_hdr_size_v6(mblk_t *, boolean_t);
-extern void	ip_wput_v6(queue_t *, mblk_t *);
-extern void	ip_wput_local_v6(queue_t *, ill_t *, ip6_t *, mblk_t *,
-    ire_t *, int, zoneid_t);
-extern void	ip_output_v6(void *, mblk_t *, void *, int);
-extern void	ip_xmit_v6(mblk_t *, ire_t *, uint_t, conn_t *, int,
-    struct ipsec_out_s *);
+extern void	ip_send_potential_redirect_v6(mblk_t *, ip6_t *, ire_t *,
+    ip_recv_attr_t *);
 extern void	ip_rput_v6(queue_t *, mblk_t *);
-extern void	ip_rput_data_v6(queue_t *, ill_t *, mblk_t *, ip6_t *,
-    uint_t, mblk_t *, mblk_t *);
-extern void	mld_input(queue_t *, mblk_t *, ill_t *);
+extern mblk_t	*mld_input(mblk_t *, ip_recv_attr_t *);
 extern void	mld_joingroup(ilm_t *);
 extern void	mld_leavegroup(ilm_t *);
 extern void	mld_timeout_handler(void *);
 
 extern void	pr_addr_dbg(char *, int, const void *);
-extern int	ip_multirt_apply_membership_v6(int (*fn)(conn_t *, boolean_t,
-    const in6_addr_t *, int, mcast_record_t, const in6_addr_t *, mblk_t *),
-    ire_t *, conn_t *, boolean_t, const in6_addr_t *, mcast_record_t,
-    const in6_addr_t *, mblk_t *);
-extern void	ip_newroute_ipif_v6(queue_t *, mblk_t *, ipif_t *,
-    const in6_addr_t *, const in6_addr_t *, int, zoneid_t);
-extern void	ip_newroute_v6(queue_t *, mblk_t *, const in6_addr_t *,
-    const in6_addr_t *, ill_t *, zoneid_t, ip_stack_t *);
 extern void	*ip6_kstat_init(netstackid_t, ip6_stat_t *);
 extern void	ip6_kstat_fini(netstackid_t, kstat_t *);
-extern size_t	ip6_get_src_preferences(conn_t *, uint32_t *);
-extern int	ip6_set_src_preferences(conn_t *, uint32_t);
-extern int	ip6_set_pktinfo(cred_t *, conn_t *, struct in6_pktinfo *);
-extern int	ip_proto_bind_laddr_v6(conn_t *, mblk_t **, uint8_t,
-    const in6_addr_t *, uint16_t, boolean_t);
-extern int	ip_proto_bind_connected_v6(conn_t *, mblk_t **,
-    uint8_t, in6_addr_t *, uint16_t, const in6_addr_t *, ip6_pkt_t *,
-    uint16_t, boolean_t, boolean_t, cred_t *);
+extern size_t	ip6_get_src_preferences(ip_xmit_attr_t *, uint32_t *);
+extern int	ip6_set_src_preferences(ip_xmit_attr_t *, uint32_t);
 
 #endif	/* _KERNEL */