/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #ifndef _INET_IP6_H #define _INET_IP6_H #pragma ident "%Z%%M% %I% %E% SMI" #ifdef __cplusplus extern "C" { #endif #include #ifdef _KERNEL /* icmp6_t is used in the prototype of icmp_inbound_error_fanout_v6() */ #include #endif /* _KERNEL */ /* version number for IPv6 - hard to get this one wrong! */ #define IPV6_VERSION 6 #define IPV6_HDR_LEN 40 #define IPV6_ADDR_LEN 16 /* * IPv6 address scopes. The values of these enums also match the scope * field of multicast addresses. */ typedef enum { IP6_SCOPE_INTFLOCAL = 1, /* Multicast addresses only */ IP6_SCOPE_LINKLOCAL, IP6_SCOPE_SUBNETLOCAL, /* Multicast addresses only */ IP6_SCOPE_ADMINLOCAL, /* Multicast addresses only */ IP6_SCOPE_SITELOCAL, IP6_SCOPE_GLOBAL } in6addr_scope_t; #ifdef _KERNEL /* * 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_ATTACH_IF 0x40 /* Bind to no failover address or BOUND_PIF. */ #define IP6I_DROP_IFDELAYED 0x80 /* Drop the packet if delayed in ndp resolver */ #define IP6I_ND_DELAYED 0x100 /* Packet was delayed in ndp resolver */ #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 /* Extract the scope from a multicast address */ #ifdef _BIG_ENDIAN #define IN6_ADDR_MC_SCOPE(addr) \ (((addr)->s6_addr32[0] & 0x000f0000) >> 16) #else #define IN6_ADDR_MC_SCOPE(addr) \ (((addr)->s6_addr32[0] & 0x00000f00) >> 8) #endif /* Default IPv4 TTL for IPv6-in-IPv4 encapsulated packets */ #define IPV6_DEFAULT_HOPS 60 /* XXX What should it be? */ /* Max IPv6 TTL */ #define IPV6_MAX_HOPS 255 /* Minimum IPv6 MTU from rfc2460 */ #define IPV6_MIN_MTU 1280 /* EUI-64 based token length */ #define IPV6_TOKEN_LEN 64 /* Length of an advertised IPv6 prefix */ #define IPV6_PREFIX_LEN 64 /* Default and maximum tunnel encapsulation limits. See RFC 2473. */ #define IPV6_DEFAULT_ENCAPLIMIT 4 #define IPV6_MAX_ENCAPLIMIT 255 /* * Minimum and maximum extension header lengths for IPv6. The 8-bit * length field of each extension header (see rfc2460) specifies the * number of 8 octet units of data in the header not including the * first 8 octets. A value of 0 would indicate 8 bytes (0 * 8 + 8), * and 255 would indicate 2048 bytes (255 * 8 + 8). */ #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 rechability confirmation to IP. */ #ifdef _BIG_ENDIAN #define IPV6_DEFAULT_VERS_AND_FLOW 0x60000000 #define IPV6_VERS_AND_FLOW_MASK 0xF0000000 #define IP_FORWARD_PROG 0x80000000 #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 0x00000080 #define V6_MCAST 0x000000FF #define V6_LINKLOCAL 0x000080FE #define IPV6_FLOW_TCLASS(x) ((((x) & 0xf000U) >> 12) |\ (((x) & 0xf) << 4)) #define IPV6_TCLASS_FLOW(f, c) (((f) & ~IPV6_FLOWINFO_TCLASS) |\ ((((c) & 0xf) << 12) |\ (((c) & 0xf0) >> 4))) #endif /* * UTILITY MACROS FOR ADDRESSES. */ /* * Convert an IPv4 address mask to an IPv6 mask. Pad with 1-bits. */ #define V4MASK_TO_V6(v4, v6) ((v6).s6_addr32[0] = 0xffffffffUL, \ (v6).s6_addr32[1] = 0xffffffffUL, \ (v6).s6_addr32[2] = 0xffffffffUL, \ (v6).s6_addr32[3] = (v4)) /* * Convert aligned IPv4-mapped IPv6 address into an IPv4 address. * Note: We use "v6" here in definition of macro instead of "(v6)" * Not possible to use "(v6)" here since macro is used with struct * field names as arguments. */ #define V4_PART_OF_V6(v6) v6.s6_addr32[3] #ifdef _BIG_ENDIAN #define V6_OR_V4_INADDR_ANY(a) ((a).s6_addr32[3] == 0 && \ ((a).s6_addr32[2] == 0xffffU || \ (a).s6_addr32[2] == 0) && \ (a).s6_addr32[1] == 0 && \ (a).s6_addr32[0] == 0) #else #define V6_OR_V4_INADDR_ANY(a) ((a).s6_addr32[3] == 0 && \ ((a).s6_addr32[2] == 0xffff0000U || \ (a).s6_addr32[2] == 0) && \ (a).s6_addr32[1] == 0 && \ (a).s6_addr32[0] == 0) #endif /* _BIG_ENDIAN */ /* IPv4-mapped CLASSD addresses */ #ifdef _BIG_ENDIAN #define IN6_IS_ADDR_V4MAPPED_CLASSD(addr) \ (((addr)->_S6_un._S6_u32[2] == 0x0000ffff) && \ (CLASSD((addr)->_S6_un._S6_u32[3])) && \ ((addr)->_S6_un._S6_u32[1] == 0) && \ ((addr)->_S6_un._S6_u32[0] == 0)) #else /* _BIG_ENDIAN */ #define IN6_IS_ADDR_V4MAPPED_CLASSD(addr) \ (((addr)->_S6_un._S6_u32[2] == 0xffff0000U) && \ (CLASSD((addr)->_S6_un._S6_u32[3])) && \ ((addr)->_S6_un._S6_u32[1] == 0) && \ ((addr)->_S6_un._S6_u32[0] == 0)) #endif /* _BIG_ENDIAN */ /* Clear an IPv6 addr */ #define V6_SET_ZERO(a) ((a).s6_addr32[0] = 0, \ (a).s6_addr32[1] = 0, \ (a).s6_addr32[2] = 0, \ (a).s6_addr32[3] = 0) /* Mask comparison: is IPv6 addr a, and'ed with mask m, equal to addr b? */ #define V6_MASK_EQ(a, m, b) \ ((((a).s6_addr32[0] & (m).s6_addr32[0]) == (b).s6_addr32[0]) && \ (((a).s6_addr32[1] & (m).s6_addr32[1]) == (b).s6_addr32[1]) && \ (((a).s6_addr32[2] & (m).s6_addr32[2]) == (b).s6_addr32[2]) && \ (((a).s6_addr32[3] & (m).s6_addr32[3]) == (b).s6_addr32[3])) #define V6_MASK_EQ_2(a, m, b) \ ((((a).s6_addr32[0] & (m).s6_addr32[0]) == \ ((b).s6_addr32[0] & (m).s6_addr32[0])) && \ (((a).s6_addr32[1] & (m).s6_addr32[1]) == \ ((b).s6_addr32[1] & (m).s6_addr32[1])) && \ (((a).s6_addr32[2] & (m).s6_addr32[2]) == \ ((b).s6_addr32[2] & (m).s6_addr32[2])) && \ (((a).s6_addr32[3] & (m).s6_addr32[3]) == \ ((b).s6_addr32[3] & (m).s6_addr32[3]))) /* Copy IPv6 address (s), logically and'ed with mask (m), into (d) */ #define V6_MASK_COPY(s, m, d) \ ((d).s6_addr32[0] = (s).s6_addr32[0] & (m).s6_addr32[0], \ (d).s6_addr32[1] = (s).s6_addr32[1] & (m).s6_addr32[1], \ (d).s6_addr32[2] = (s).s6_addr32[2] & (m).s6_addr32[2], \ (d).s6_addr32[3] = (s).s6_addr32[3] & (m).s6_addr32[3]) #define ILL_FRAG_HASH_V6(v6addr, i) \ ((ntohl((v6addr).s6_addr32[3]) ^ (i ^ (i >> 8))) % \ ILL_FRAG_HASH_TBL_COUNT) /* * GLOBAL EXTERNALS */ extern uint_t ipv6_ire_default_count; /* Number of IPv6 IRE_DEFAULT entries */ extern uint_t ipv6_ire_default_index; /* Walking IPv6 index used to mod in */ extern int ipv6_ire_cache_cnt; /* Number of IPv6 IRE_CACHE entries */ extern const in6_addr_t ipv6_all_ones; extern const in6_addr_t ipv6_all_zeros; extern const in6_addr_t ipv6_loopback; extern const in6_addr_t ipv6_all_hosts_mcast; extern const in6_addr_t ipv6_all_rtrs_mcast; extern const in6_addr_t ipv6_all_v2rtrs_mcast; extern const in6_addr_t ipv6_solicited_node_mcast; extern const in6_addr_t ipv6_unspecified_group; /* * IPv6 mibs when the interface (ill) is not known. * When the ill is known the per-interface mib in the ill is used. */ extern mib2_ipv6IfStatsEntry_t ip6_mib; extern mib2_ipv6IfIcmpEntry_t icmp6_mib; /* * 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); extern void icmp_unreachable_v6(queue_t *, mblk_t *, uint8_t, boolean_t, boolean_t, zoneid_t); extern void icmp_inbound_error_fanout_v6(queue_t *, mblk_t *, ip6_t *, icmp6_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 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); 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 *, boolean_t *); extern ip6_rthdr_t *ip_find_rthdr_v6(ip6_t *, uint8_t *); extern int ip_hdr_complete_v6(ip6_t *, zoneid_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 uint32_t ip_massage_options_v6(ip6_t *, ip6_rthdr_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 int ipsec_ah_get_hdr_size_v6(mblk_t *, boolean_t); extern void ip_wput_local_v6(queue_t *, ill_t *, ip6_t *, mblk_t *, ire_t *, int); extern void ip_wput_md_v6(queue_t *, mblk_t *, conn_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_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 void mld_joingroup(ilm_t *); extern void mld_leavegroup(ilm_t *); extern void mld_timeout_handler(void *); extern void mld_timeout_start(int); extern void pr_addr_dbg(char *, int, const void *); extern ipif_t *ip_newroute_get_src_ipif_v6(ipif_t *, boolean_t, const in6_addr_t *); 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 *, 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); extern void ip6_kstat_init(void); 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 *, mblk_t *); #endif /* _KERNEL */ #ifdef __cplusplus } #endif #endif /* _INET_IP6_H */