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freebsd-nq/sys/netinet6/in6_var.h
Gleb Smirnoff fcb3f813f3 netinet*: remove PRC_ constants and streamline ICMP processing 
In the original design of the network stack from the protocol control
input method pr_ctlinput was used notify the protocols about two very
different kinds of events: internal system events and receival of an
ICMP messages from outside.  These events were coded with PRC_ codes.
Today these methods are removed from the protosw(9) and are isolated
to IPv4 and IPv6 stacks and are called only from icmp*_input().  The
PRC_ codes now just create a shim layer between ICMP codes and errors
or actions taken by protocols.

- Change ipproto_ctlinput_t to pass just pointer to ICMP header.  This
  allows protocols to not deduct it from the internal IP header.
- Change ip6proto_ctlinput_t to pass just struct ip6ctlparam pointer.
  It has all the information needed to the protocols.  In the structure,
  change ip6c_finaldst fields to sockaddr_in6.  The reason is that
  icmp6_input() already has this address wrapped in sockaddr, and the
  protocols want this address as sockaddr.
- For UDP tunneling control input, as well as for IPSEC control input,
  change the prototypes to accept a transparent union of either ICMP
  header pointer or struct ip6ctlparam pointer.
- In icmp_input() and icmp6_input() do only validation of ICMP header and
  count bad packets.  The translation of ICMP codes to errors/actions is
  done by protocols.
- Provide icmp_errmap() and icmp6_errmap() as substitute to inetctlerrmap,
  inet6ctlerrmap arrays.
- In protocol ctlinput methods either trust what icmp_errmap() recommend,
  or do our own logic based on the ICMP header.

Differential revision:	https://reviews.freebsd.org/D36731
2022-10-03 20:53:04 -07:00

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/*-
* 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: in6_var.h,v 1.56 2001/03/29 05:34:31 itojun Exp $
*/
/*-
* Copyright (c) 1985, 1986, 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.
*
* @(#)in_var.h 8.1 (Berkeley) 6/10/93
* $FreeBSD$
*/
#ifndef _NETINET6_IN6_VAR_H_
#define _NETINET6_IN6_VAR_H_
#include <sys/tree.h>
#include <sys/counter.h>
#ifdef _KERNEL
#include <sys/fnv_hash.h>
#include <sys/libkern.h>
#endif
/*
* Interface address, Internet version. One of these structures
* is allocated for each interface with an Internet address.
* The ifaddr structure contains the protocol-independent part
* of the structure and is assumed to be first.
*/
/*
* pltime/vltime are just for future reference (required to implements 2
* hour rule for hosts). they should never be modified by nd6_timeout or
* anywhere else.
* userland -> kernel: accept pltime/vltime
* kernel -> userland: throw up everything
* in kernel: modify preferred/expire only
*/
struct in6_addrlifetime {
time_t ia6t_expire; /* valid lifetime expiration time */
time_t ia6t_preferred; /* preferred lifetime expiration time */
u_int32_t ia6t_vltime; /* valid lifetime */
u_int32_t ia6t_pltime; /* prefix lifetime */
};
struct nd_ifinfo;
struct scope6_id;
struct lltable;
struct mld_ifsoftc;
struct in6_multi;
struct in6_ifextra {
counter_u64_t *in6_ifstat;
counter_u64_t *icmp6_ifstat;
struct nd_ifinfo *nd_ifinfo;
struct scope6_id *scope6_id;
struct lltable *lltable;
struct mld_ifsoftc *mld_ifinfo;
};
#define LLTABLE6(ifp) (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->lltable)
#ifdef _KERNEL
SLIST_HEAD(in6_multi_head, in6_multi);
MALLOC_DECLARE(M_IP6MADDR);
struct in6_ifaddr {
struct ifaddr ia_ifa; /* protocol-independent info */
#define ia_ifp ia_ifa.ifa_ifp
#define ia_flags ia_ifa.ifa_flags
struct sockaddr_in6 ia_addr; /* interface address */
struct sockaddr_in6 ia_net; /* network number of interface */
struct sockaddr_in6 ia_dstaddr; /* space for destination addr */
struct sockaddr_in6 ia_prefixmask; /* prefix mask */
u_int32_t ia_plen; /* prefix length */
CK_STAILQ_ENTRY(in6_ifaddr) ia_link; /* list of IPv6 addresses */
int ia6_flags;
struct in6_addrlifetime ia6_lifetime;
time_t ia6_createtime; /* the creation time of this address, which is
* currently used for temporary addresses only.
*/
time_t ia6_updatetime;
/* back pointer to the ND prefix (for autoconfigured addresses only) */
struct nd_prefix *ia6_ndpr;
/* multicast addresses joined from the kernel */
LIST_HEAD(, in6_multi_mship) ia6_memberships;
/* entry in bucket of inet6 addresses */
CK_LIST_ENTRY(in6_ifaddr) ia6_hash;
};
/* List of in6_ifaddr's. */
CK_STAILQ_HEAD(in6_ifaddrhead, in6_ifaddr);
CK_LIST_HEAD(in6_ifaddrlisthead, in6_ifaddr);
#endif /* _KERNEL */
/* control structure to manage address selection policy */
struct in6_addrpolicy {
struct sockaddr_in6 addr; /* prefix address */
struct sockaddr_in6 addrmask; /* prefix mask */
int preced; /* precedence */
int label; /* matching label */
u_quad_t use; /* statistics */
};
/*
* IPv6 interface statistics, as defined in RFC2465 Ipv6IfStatsEntry (p12).
*/
struct in6_ifstat {
uint64_t ifs6_in_receive; /* # of total input datagram */
uint64_t ifs6_in_hdrerr; /* # of datagrams with invalid hdr */
uint64_t ifs6_in_toobig; /* # of datagrams exceeded MTU */
uint64_t ifs6_in_noroute; /* # of datagrams with no route */
uint64_t ifs6_in_addrerr; /* # of datagrams with invalid dst */
uint64_t ifs6_in_protounknown; /* # of datagrams with unknown proto */
/* NOTE: increment on final dst if */
uint64_t ifs6_in_truncated; /* # of truncated datagrams */
uint64_t ifs6_in_discard; /* # of discarded datagrams */
/* NOTE: fragment timeout is not here */
uint64_t ifs6_in_deliver; /* # of datagrams delivered to ULP */
/* NOTE: increment on final dst if */
uint64_t ifs6_out_forward; /* # of datagrams forwarded */
/* NOTE: increment on outgoing if */
uint64_t ifs6_out_request; /* # of outgoing datagrams from ULP */
/* NOTE: does not include forwrads */
uint64_t ifs6_out_discard; /* # of discarded datagrams */
uint64_t ifs6_out_fragok; /* # of datagrams fragmented */
uint64_t ifs6_out_fragfail; /* # of datagrams failed on fragment */
uint64_t ifs6_out_fragcreat; /* # of fragment datagrams */
/* NOTE: this is # after fragment */
uint64_t ifs6_reass_reqd; /* # of incoming fragmented packets */
/* NOTE: increment on final dst if */
uint64_t ifs6_reass_ok; /* # of reassembled packets */
/* NOTE: this is # after reass */
/* NOTE: increment on final dst if */
uint64_t ifs6_reass_fail; /* # of reass failures */
/* NOTE: may not be packet count */
/* NOTE: increment on final dst if */
uint64_t ifs6_in_mcast; /* # of inbound multicast datagrams */
uint64_t ifs6_out_mcast; /* # of outbound multicast datagrams */
};
/*
* ICMPv6 interface statistics, as defined in RFC2466 Ipv6IfIcmpEntry.
* XXX: I'm not sure if this file is the right place for this structure...
*/
struct icmp6_ifstat {
/*
* Input statistics
*/
/* ipv6IfIcmpInMsgs, total # of input messages */
uint64_t ifs6_in_msg;
/* ipv6IfIcmpInErrors, # of input error messages */
uint64_t ifs6_in_error;
/* ipv6IfIcmpInDestUnreachs, # of input dest unreach errors */
uint64_t ifs6_in_dstunreach;
/* ipv6IfIcmpInAdminProhibs, # of input administratively prohibited errs */
uint64_t ifs6_in_adminprohib;
/* ipv6IfIcmpInTimeExcds, # of input time exceeded errors */
uint64_t ifs6_in_timeexceed;
/* ipv6IfIcmpInParmProblems, # of input parameter problem errors */
uint64_t ifs6_in_paramprob;
/* ipv6IfIcmpInPktTooBigs, # of input packet too big errors */
uint64_t ifs6_in_pkttoobig;
/* ipv6IfIcmpInEchos, # of input echo requests */
uint64_t ifs6_in_echo;
/* ipv6IfIcmpInEchoReplies, # of input echo replies */
uint64_t ifs6_in_echoreply;
/* ipv6IfIcmpInRouterSolicits, # of input router solicitations */
uint64_t ifs6_in_routersolicit;
/* ipv6IfIcmpInRouterAdvertisements, # of input router advertisements */
uint64_t ifs6_in_routeradvert;
/* ipv6IfIcmpInNeighborSolicits, # of input neighbor solicitations */
uint64_t ifs6_in_neighborsolicit;
/* ipv6IfIcmpInNeighborAdvertisements, # of input neighbor advertisements */
uint64_t ifs6_in_neighboradvert;
/* ipv6IfIcmpInRedirects, # of input redirects */
uint64_t ifs6_in_redirect;
/* ipv6IfIcmpInGroupMembQueries, # of input MLD queries */
uint64_t ifs6_in_mldquery;
/* ipv6IfIcmpInGroupMembResponses, # of input MLD reports */
uint64_t ifs6_in_mldreport;
/* ipv6IfIcmpInGroupMembReductions, # of input MLD done */
uint64_t ifs6_in_mlddone;
/*
* Output statistics. We should solve unresolved routing problem...
*/
/* ipv6IfIcmpOutMsgs, total # of output messages */
uint64_t ifs6_out_msg;
/* ipv6IfIcmpOutErrors, # of output error messages */
uint64_t ifs6_out_error;
/* ipv6IfIcmpOutDestUnreachs, # of output dest unreach errors */
uint64_t ifs6_out_dstunreach;
/* ipv6IfIcmpOutAdminProhibs, # of output administratively prohibited errs */
uint64_t ifs6_out_adminprohib;
/* ipv6IfIcmpOutTimeExcds, # of output time exceeded errors */
uint64_t ifs6_out_timeexceed;
/* ipv6IfIcmpOutParmProblems, # of output parameter problem errors */
uint64_t ifs6_out_paramprob;
/* ipv6IfIcmpOutPktTooBigs, # of output packet too big errors */
uint64_t ifs6_out_pkttoobig;
/* ipv6IfIcmpOutEchos, # of output echo requests */
uint64_t ifs6_out_echo;
/* ipv6IfIcmpOutEchoReplies, # of output echo replies */
uint64_t ifs6_out_echoreply;
/* ipv6IfIcmpOutRouterSolicits, # of output router solicitations */
uint64_t ifs6_out_routersolicit;
/* ipv6IfIcmpOutRouterAdvertisements, # of output router advertisements */
uint64_t ifs6_out_routeradvert;
/* ipv6IfIcmpOutNeighborSolicits, # of output neighbor solicitations */
uint64_t ifs6_out_neighborsolicit;
/* ipv6IfIcmpOutNeighborAdvertisements, # of output neighbor advertisements */
uint64_t ifs6_out_neighboradvert;
/* ipv6IfIcmpOutRedirects, # of output redirects */
uint64_t ifs6_out_redirect;
/* ipv6IfIcmpOutGroupMembQueries, # of output MLD queries */
uint64_t ifs6_out_mldquery;
/* ipv6IfIcmpOutGroupMembResponses, # of output MLD reports */
uint64_t ifs6_out_mldreport;
/* ipv6IfIcmpOutGroupMembReductions, # of output MLD done */
uint64_t ifs6_out_mlddone;
};
struct in6_ifreq {
char ifr_name[IFNAMSIZ];
union {
struct sockaddr_in6 ifru_addr;
struct sockaddr_in6 ifru_dstaddr;
int ifru_flags;
int ifru_flags6;
int ifru_metric;
caddr_t ifru_data;
struct in6_addrlifetime ifru_lifetime;
struct in6_ifstat ifru_stat;
struct icmp6_ifstat ifru_icmp6stat;
u_int32_t ifru_scope_id[16];
} ifr_ifru;
};
struct in6_aliasreq {
char ifra_name[IFNAMSIZ];
struct sockaddr_in6 ifra_addr;
struct sockaddr_in6 ifra_dstaddr;
struct sockaddr_in6 ifra_prefixmask;
int ifra_flags;
struct in6_addrlifetime ifra_lifetime;
int ifra_vhid;
};
/* pre-10.x compat */
struct oin6_aliasreq {
char ifra_name[IFNAMSIZ];
struct sockaddr_in6 ifra_addr;
struct sockaddr_in6 ifra_dstaddr;
struct sockaddr_in6 ifra_prefixmask;
int ifra_flags;
struct in6_addrlifetime ifra_lifetime;
};
/* prefix type macro */
#define IN6_PREFIX_ND 1
#define IN6_PREFIX_RR 2
/*
* prefix related flags passed between kernel(NDP related part) and
* user land command(ifconfig) and daemon(rtadvd).
*/
struct in6_prflags {
struct prf_ra {
u_char onlink : 1;
u_char autonomous : 1;
u_char ra_derived: 1;
u_char reserved : 5;
} prf_ra;
u_char prf_reserved1;
u_short prf_reserved2;
/* want to put this on 4byte offset */
struct prf_rr {
u_char decrvalid : 1;
u_char decrprefd : 1;
u_char reserved : 6;
} prf_rr;
u_char prf_reserved3;
u_short prf_reserved4;
};
struct in6_prefixreq {
char ipr_name[IFNAMSIZ];
u_char ipr_origin;
u_char ipr_plen;
u_int32_t ipr_vltime;
u_int32_t ipr_pltime;
struct in6_prflags ipr_flags;
struct sockaddr_in6 ipr_prefix;
};
#define PR_ORIG_RA 0
#define PR_ORIG_RR 1
#define PR_ORIG_STATIC 2
#define PR_ORIG_KERNEL 3
#define ipr_raf_onlink ipr_flags.prf_ra.onlink
#define ipr_raf_auto ipr_flags.prf_ra.autonomous
#define ipr_raf_ra_derived ipr_flags.prf_ra.ra_derived
#define ipr_statef_onlink ipr_flags.prf_state.onlink
#define ipr_rrf_decrvalid ipr_flags.prf_rr.decrvalid
#define ipr_rrf_decrprefd ipr_flags.prf_rr.decrprefd
struct in6_rrenumreq {
char irr_name[IFNAMSIZ];
u_char irr_origin;
u_char irr_m_len; /* match len for matchprefix */
u_char irr_m_minlen; /* minlen for matching prefix */
u_char irr_m_maxlen; /* maxlen for matching prefix */
u_char irr_u_uselen; /* uselen for adding prefix */
u_char irr_u_keeplen; /* keeplen from matching prefix */
struct irr_raflagmask {
u_char onlink : 1;
u_char autonomous : 1;
u_char reserved : 6;
} irr_raflagmask;
u_int32_t irr_vltime;
u_int32_t irr_pltime;
struct in6_prflags irr_flags;
struct sockaddr_in6 irr_matchprefix;
struct sockaddr_in6 irr_useprefix;
};
#define irr_raf_mask_onlink irr_raflagmask.onlink
#define irr_raf_mask_auto irr_raflagmask.autonomous
#define irr_raf_mask_reserved irr_raflagmask.reserved
#define irr_raf_onlink irr_flags.prf_ra.onlink
#define irr_raf_auto irr_flags.prf_ra.autonomous
#define irr_statef_onlink irr_flags.prf_state.onlink
#define irr_rrf irr_flags.prf_rr
#define irr_rrf_decrvalid irr_flags.prf_rr.decrvalid
#define irr_rrf_decrprefd irr_flags.prf_rr.decrprefd
/*
* Given a pointer to an in6_ifaddr (ifaddr),
* return a pointer to the addr as a sockaddr_in6
*/
#define IA6_IN6(ia) (&((ia)->ia_addr.sin6_addr))
#define IA6_DSTIN6(ia) (&((ia)->ia_dstaddr.sin6_addr))
#define IA6_MASKIN6(ia) (&((ia)->ia_prefixmask.sin6_addr))
#define IA6_SIN6(ia) (&((ia)->ia_addr))
#define IA6_DSTSIN6(ia) (&((ia)->ia_dstaddr))
#define IFA_IN6(x) (&((struct sockaddr_in6 *)((x)->ifa_addr))->sin6_addr)
#define IFA_DSTIN6(x) (&((struct sockaddr_in6 *)((x)->ifa_dstaddr))->sin6_addr)
#define IFA_MASKIN6(x) (&((struct sockaddr_in6 *)((x)->ifa_netmask))->sin6_addr)
#define IFPR_IN6(x) (&((struct sockaddr_in6 *)((x)->ifpr_prefix))->sin6_addr)
#ifdef _KERNEL
#define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \
(((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \
(((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \
(((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \
(((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 )
#define IN6_MASK_ADDR(a, m) do { \
(a)->s6_addr32[0] &= (m)->s6_addr32[0]; \
(a)->s6_addr32[1] &= (m)->s6_addr32[1]; \
(a)->s6_addr32[2] &= (m)->s6_addr32[2]; \
(a)->s6_addr32[3] &= (m)->s6_addr32[3]; \
} while (0)
#endif
#define SIOCSIFADDR_IN6 _IOW('i', 12, struct in6_ifreq)
#define SIOCGIFADDR_IN6 _IOWR('i', 33, struct in6_ifreq)
#ifdef _KERNEL
/*
* SIOCSxxx ioctls should be unused (see comments in in6.c), but
* we do not shift numbers for binary compatibility.
*/
#define SIOCSIFDSTADDR_IN6 _IOW('i', 14, struct in6_ifreq)
#define SIOCSIFNETMASK_IN6 _IOW('i', 22, struct in6_ifreq)
#endif
#define SIOCGIFDSTADDR_IN6 _IOWR('i', 34, struct in6_ifreq)
#define SIOCGIFNETMASK_IN6 _IOWR('i', 37, struct in6_ifreq)
#define SIOCDIFADDR_IN6 _IOW('i', 25, struct in6_ifreq)
#define OSIOCAIFADDR_IN6 _IOW('i', 26, struct oin6_aliasreq)
#define SIOCAIFADDR_IN6 _IOW('i', 27, struct in6_aliasreq)
#define SIOCSIFPHYADDR_IN6 _IOW('i', 70, struct in6_aliasreq)
#define SIOCGIFPSRCADDR_IN6 _IOWR('i', 71, struct in6_ifreq)
#define SIOCGIFPDSTADDR_IN6 _IOWR('i', 72, struct in6_ifreq)
#define SIOCGIFAFLAG_IN6 _IOWR('i', 73, struct in6_ifreq)
#ifdef _KERNEL
#define OSIOCGIFINFO_IN6 _IOWR('i', 76, struct in6_ondireq)
#endif
#define SIOCGIFINFO_IN6 _IOWR('i', 108, struct in6_ndireq)
#define SIOCSIFINFO_IN6 _IOWR('i', 109, struct in6_ndireq)
#define SIOCSNDFLUSH_IN6 _IOWR('i', 77, struct in6_ifreq)
#define SIOCGNBRINFO_IN6 _IOWR('i', 78, struct in6_nbrinfo)
#define SIOCSPFXFLUSH_IN6 _IOWR('i', 79, struct in6_ifreq)
#define SIOCSRTRFLUSH_IN6 _IOWR('i', 80, struct in6_ifreq)
#define SIOCGIFALIFETIME_IN6 _IOWR('i', 81, struct in6_ifreq)
#define SIOCGIFSTAT_IN6 _IOWR('i', 83, struct in6_ifreq)
#define SIOCGIFSTAT_ICMP6 _IOWR('i', 84, struct in6_ifreq)
#define SIOCSDEFIFACE_IN6 _IOWR('i', 85, struct in6_ndifreq)
#define SIOCGDEFIFACE_IN6 _IOWR('i', 86, struct in6_ndifreq)
#define SIOCSIFINFO_FLAGS _IOWR('i', 87, struct in6_ndireq) /* XXX */
#define SIOCSSCOPE6 _IOW('i', 88, struct in6_ifreq)
#define SIOCGSCOPE6 _IOWR('i', 89, struct in6_ifreq)
#define SIOCGSCOPE6DEF _IOWR('i', 90, struct in6_ifreq)
#define SIOCSIFPREFIX_IN6 _IOW('i', 100, struct in6_prefixreq) /* set */
#define SIOCGIFPREFIX_IN6 _IOWR('i', 101, struct in6_prefixreq) /* get */
#define SIOCDIFPREFIX_IN6 _IOW('i', 102, struct in6_prefixreq) /* del */
#define SIOCAIFPREFIX_IN6 _IOW('i', 103, struct in6_rrenumreq) /* add */
#define SIOCCIFPREFIX_IN6 _IOW('i', 104, \
struct in6_rrenumreq) /* change */
#define SIOCSGIFPREFIX_IN6 _IOW('i', 105, \
struct in6_rrenumreq) /* set global */
#define SIOCGETSGCNT_IN6 _IOWR('u', 106, \
struct sioc_sg_req6) /* get s,g pkt cnt */
#define SIOCGETMIFCNT_IN6 _IOWR('u', 107, \
struct sioc_mif_req6) /* get pkt cnt per if */
#define SIOCAADDRCTL_POLICY _IOW('u', 108, struct in6_addrpolicy)
#define SIOCDADDRCTL_POLICY _IOW('u', 109, struct in6_addrpolicy)
#define IN6_IFF_ANYCAST 0x01 /* anycast address */
#define IN6_IFF_TENTATIVE 0x02 /* tentative address */
#define IN6_IFF_DUPLICATED 0x04 /* DAD detected duplicate */
#define IN6_IFF_DETACHED 0x08 /* may be detached from the link */
#define IN6_IFF_DEPRECATED 0x10 /* deprecated address */
#define IN6_IFF_NODAD 0x20 /* don't perform DAD on this address
* (obsolete)
*/
#define IN6_IFF_AUTOCONF 0x40 /* autoconfigurable address. */
#define IN6_IFF_TEMPORARY 0x80 /* temporary (anonymous) address. */
#define IN6_IFF_PREFER_SOURCE 0x0100 /* preferred address for SAS */
/* do not input/output */
#define IN6_IFF_NOTREADY (IN6_IFF_TENTATIVE|IN6_IFF_DUPLICATED)
#ifdef _KERNEL
#define IN6_ARE_SCOPE_CMP(a,b) ((a)-(b))
#define IN6_ARE_SCOPE_EQUAL(a,b) ((a)==(b))
#endif
#ifdef _KERNEL
VNET_DECLARE(struct in6_ifaddrhead, in6_ifaddrhead);
VNET_DECLARE(struct in6_ifaddrlisthead *, in6_ifaddrhashtbl);
VNET_DECLARE(u_long, in6_ifaddrhmask);
#define V_in6_ifaddrhead VNET(in6_ifaddrhead)
#define V_in6_ifaddrhashtbl VNET(in6_ifaddrhashtbl)
#define V_in6_ifaddrhmask VNET(in6_ifaddrhmask)
#define IN6ADDR_NHASH_LOG2 8
#define IN6ADDR_NHASH (1 << IN6ADDR_NHASH_LOG2)
#define IN6ADDR_HASHVAL(x) (in6_addrhash(x))
#define IN6ADDR_HASH(x) \
(&V_in6_ifaddrhashtbl[IN6ADDR_HASHVAL(x) & V_in6_ifaddrhmask])
static __inline uint32_t
in6_addrhash(const struct in6_addr *in6)
{
uint32_t x;
x = in6->s6_addr32[0] ^ in6->s6_addr32[1] ^ in6->s6_addr32[2] ^
in6->s6_addr32[3];
return (fnv_32_buf(&x, sizeof(x), FNV1_32_INIT));
}
extern struct rmlock in6_ifaddr_lock;
#define IN6_IFADDR_LOCK_ASSERT() rm_assert(&in6_ifaddr_lock, RA_LOCKED)
#define IN6_IFADDR_RLOCK(t) rm_rlock(&in6_ifaddr_lock, (t))
#define IN6_IFADDR_RLOCK_ASSERT() rm_assert(&in6_ifaddr_lock, RA_RLOCKED)
#define IN6_IFADDR_RUNLOCK(t) rm_runlock(&in6_ifaddr_lock, (t))
#define IN6_IFADDR_WLOCK() rm_wlock(&in6_ifaddr_lock)
#define IN6_IFADDR_WLOCK_ASSERT() rm_assert(&in6_ifaddr_lock, RA_WLOCKED)
#define IN6_IFADDR_WUNLOCK() rm_wunlock(&in6_ifaddr_lock)
#define in6_ifstat_inc(ifp, tag) \
do { \
if (ifp) \
counter_u64_add(((struct in6_ifextra *) \
((ifp)->if_afdata[AF_INET6]))->in6_ifstat[ \
offsetof(struct in6_ifstat, tag) / sizeof(uint64_t)], 1);\
} while (/*CONSTCOND*/ 0)
VNET_DECLARE(unsigned long, in6_maxmtu);
#define V_in6_maxmtu VNET(in6_maxmtu)
#endif /* _KERNEL */
/*
* IPv6 multicast MLD-layer source entry.
*/
struct ip6_msource {
RB_ENTRY(ip6_msource) im6s_link; /* RB tree links */
struct in6_addr im6s_addr;
struct im6s_st {
uint16_t ex; /* # of exclusive members */
uint16_t in; /* # of inclusive members */
} im6s_st[2]; /* state at t0, t1 */
uint8_t im6s_stp; /* pending query */
};
RB_HEAD(ip6_msource_tree, ip6_msource);
/*
* IPv6 multicast PCB-layer source entry.
*
* NOTE: overlapping use of struct ip6_msource fields at start.
*/
struct in6_msource {
RB_ENTRY(ip6_msource) im6s_link; /* Common field */
struct in6_addr im6s_addr; /* Common field */
uint8_t im6sl_st[2]; /* state before/at commit */
};
#ifdef _KERNEL
/*
* IPv6 source tree comparison function.
*
* An ordered predicate is necessary; bcmp() is not documented to return
* an indication of order, memcmp() is, and is an ISO C99 requirement.
*/
static __inline int
ip6_msource_cmp(const struct ip6_msource *a, const struct ip6_msource *b)
{
return (memcmp(&a->im6s_addr, &b->im6s_addr, sizeof(struct in6_addr)));
}
RB_PROTOTYPE(ip6_msource_tree, ip6_msource, im6s_link, ip6_msource_cmp);
/*
* IPv6 multicast PCB-layer group filter descriptor.
*/
struct in6_mfilter {
struct ip6_msource_tree im6f_sources; /* source list for (S,G) */
u_long im6f_nsrc; /* # of source entries */
uint8_t im6f_st[2]; /* state before/at commit */
struct in6_multi *im6f_in6m; /* associated multicast address */
STAILQ_ENTRY(in6_mfilter) im6f_entry; /* list entry */
};
/*
* Helper types and functions for IPv4 multicast filters.
*/
STAILQ_HEAD(ip6_mfilter_head, in6_mfilter);
struct in6_mfilter *ip6_mfilter_alloc(int mflags, int st0, int st1);
void ip6_mfilter_free(struct in6_mfilter *);
static inline void
ip6_mfilter_init(struct ip6_mfilter_head *head)
{
STAILQ_INIT(head);
}
static inline struct in6_mfilter *
ip6_mfilter_first(const struct ip6_mfilter_head *head)
{
return (STAILQ_FIRST(head));
}
static inline void
ip6_mfilter_insert(struct ip6_mfilter_head *head, struct in6_mfilter *imf)
{
STAILQ_INSERT_TAIL(head, imf, im6f_entry);
}
static inline void
ip6_mfilter_remove(struct ip6_mfilter_head *head, struct in6_mfilter *imf)
{
STAILQ_REMOVE(head, imf, in6_mfilter, im6f_entry);
}
#define IP6_MFILTER_FOREACH(imf, head) \
STAILQ_FOREACH(imf, head, im6f_entry)
static inline size_t
ip6_mfilter_count(struct ip6_mfilter_head *head)
{
struct in6_mfilter *imf;
size_t num = 0;
STAILQ_FOREACH(imf, head, im6f_entry)
num++;
return (num);
}
/*
* Legacy KAME IPv6 multicast membership descriptor.
*/
struct in6_multi_mship {
struct in6_multi *i6mm_maddr;
LIST_ENTRY(in6_multi_mship) i6mm_chain;
};
/*
* IPv6 group descriptor.
*
* For every entry on an ifnet's if_multiaddrs list which represents
* an IP multicast group, there is one of these structures.
*
* If any source filters are present, then a node will exist in the RB-tree
* to permit fast lookup by source whenever an operation takes place.
* This permits pre-order traversal when we issue reports.
* Source filter trees are kept separately from the socket layer to
* greatly simplify locking.
*
* When MLDv2 is active, in6m_timer is the response to group query timer.
* The state-change timer in6m_sctimer is separate; whenever state changes
* for the group the state change record is generated and transmitted,
* and kept if retransmissions are necessary.
*
* FUTURE: in6m_link is now only used when groups are being purged
* on a detaching ifnet. It could be demoted to a SLIST_ENTRY, but
* because it is at the very start of the struct, we can't do this
* w/o breaking the ABI for ifmcstat.
*/
struct in6_multi {
struct in6_addr in6m_addr; /* IPv6 multicast address */
struct ifnet *in6m_ifp; /* back pointer to ifnet */
struct ifmultiaddr *in6m_ifma; /* back pointer to ifmultiaddr */
u_int in6m_refcount; /* reference count */
u_int in6m_state; /* state of the membership */
u_int in6m_timer; /* MLD6 listener report timer */
/* New fields for MLDv2 follow. */
struct mld_ifsoftc *in6m_mli; /* MLD info */
SLIST_ENTRY(in6_multi) in6m_nrele; /* to-be-released by MLD */
SLIST_ENTRY(in6_multi) in6m_defer; /* deferred MLDv1 */
struct ip6_msource_tree in6m_srcs; /* tree of sources */
u_long in6m_nsrc; /* # of tree entries */
struct mbufq in6m_scq; /* queue of pending
* state-change packets */
struct timeval in6m_lastgsrtv; /* last G-S-R query */
uint16_t in6m_sctimer; /* state-change timer */
uint16_t in6m_scrv; /* state-change rexmit count */
/*
* SSM state counters which track state at T0 (the time the last
* state-change report's RV timer went to zero) and T1
* (time of pending report, i.e. now).
* Used for computing MLDv2 state-change reports. Several refcounts
* are maintained here to optimize for common use-cases.
*/
struct in6m_st {
uint16_t iss_fmode; /* MLD filter mode */
uint16_t iss_asm; /* # of ASM listeners */
uint16_t iss_ex; /* # of exclusive members */
uint16_t iss_in; /* # of inclusive members */
uint16_t iss_rec; /* # of recorded sources */
} in6m_st[2]; /* state at t0, t1 */
};
void in6m_disconnect_locked(struct in6_multi_head *inmh, struct in6_multi *inm);
/*
* Helper function to derive the filter mode on a source entry
* from its internal counters. Predicates are:
* A source is only excluded if all listeners exclude it.
* A source is only included if no listeners exclude it,
* and at least one listener includes it.
* May be used by ifmcstat(8).
*/
static __inline uint8_t
im6s_get_mode(const struct in6_multi *inm, const struct ip6_msource *ims,
uint8_t t)
{
t = !!t;
if (inm->in6m_st[t].iss_ex > 0 &&
inm->in6m_st[t].iss_ex == ims->im6s_st[t].ex)
return (MCAST_EXCLUDE);
else if (ims->im6s_st[t].in > 0 && ims->im6s_st[t].ex == 0)
return (MCAST_INCLUDE);
return (MCAST_UNDEFINED);
}
/*
* Lock macros for IPv6 layer multicast address lists. IPv6 lock goes
* before link layer multicast locks in the lock order. In most cases,
* consumers of IN_*_MULTI() macros should acquire the locks before
* calling them; users of the in_{add,del}multi() functions should not.
*/
extern struct mtx in6_multi_list_mtx;
extern struct sx in6_multi_sx;
#define IN6_MULTI_LIST_LOCK() mtx_lock(&in6_multi_list_mtx)
#define IN6_MULTI_LIST_UNLOCK() mtx_unlock(&in6_multi_list_mtx)
#define IN6_MULTI_LIST_LOCK_ASSERT() mtx_assert(&in6_multi_list_mtx, MA_OWNED)
#define IN6_MULTI_LIST_UNLOCK_ASSERT() mtx_assert(&in6_multi_list_mtx, MA_NOTOWNED)
#define IN6_MULTI_LOCK() sx_xlock(&in6_multi_sx)
#define IN6_MULTI_UNLOCK() sx_xunlock(&in6_multi_sx)
#define IN6_MULTI_LOCK_ASSERT() sx_assert(&in6_multi_sx, SA_XLOCKED)
#define IN6_MULTI_UNLOCK_ASSERT() sx_assert(&in6_multi_sx, SA_XUNLOCKED)
/*
* Get the in6_multi pointer from a ifmultiaddr.
* Returns NULL if ifmultiaddr is no longer valid.
*/
static __inline struct in6_multi *
in6m_ifmultiaddr_get_inm(struct ifmultiaddr *ifma)
{
NET_EPOCH_ASSERT();
return ((ifma->ifma_addr->sa_family != AF_INET6 ||
(ifma->ifma_flags & IFMA_F_ENQUEUED) == 0) ? NULL :
ifma->ifma_protospec);
}
/*
* Look up an in6_multi record for an IPv6 multicast address
* on the interface ifp.
* If no record found, return NULL.
*
* SMPng: The IN6_MULTI_LOCK and must be held and must be in network epoch.
*/
static __inline struct in6_multi *
in6m_lookup_locked(struct ifnet *ifp, const struct in6_addr *mcaddr)
{
struct ifmultiaddr *ifma;
struct in6_multi *inm;
CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
inm = in6m_ifmultiaddr_get_inm(ifma);
if (inm == NULL)
continue;
if (IN6_ARE_ADDR_EQUAL(&inm->in6m_addr, mcaddr))
return (inm);
}
return (NULL);
}
/*
* Wrapper for in6m_lookup_locked().
*
* SMPng: Assumes network epoch entered and that IN6_MULTI_LOCK() isn't held.
*/
static __inline struct in6_multi *
in6m_lookup(struct ifnet *ifp, const struct in6_addr *mcaddr)
{
struct in6_multi *inm;
NET_EPOCH_ASSERT();
IN6_MULTI_LIST_LOCK();
inm = in6m_lookup_locked(ifp, mcaddr);
IN6_MULTI_LIST_UNLOCK();
return (inm);
}
/* Acquire an in6_multi record. */
static __inline void
in6m_acquire_locked(struct in6_multi *inm)
{
IN6_MULTI_LIST_LOCK_ASSERT();
++inm->in6m_refcount;
}
static __inline void
in6m_acquire(struct in6_multi *inm)
{
IN6_MULTI_LIST_LOCK();
in6m_acquire_locked(inm);
IN6_MULTI_LIST_UNLOCK();
}
static __inline void
in6m_rele_locked(struct in6_multi_head *inmh, struct in6_multi *inm)
{
KASSERT(inm->in6m_refcount > 0, ("refcount == %d inm: %p", inm->in6m_refcount, inm));
IN6_MULTI_LIST_LOCK_ASSERT();
if (--inm->in6m_refcount == 0) {
MPASS(inm->in6m_ifp == NULL);
inm->in6m_ifma->ifma_protospec = NULL;
MPASS(inm->in6m_ifma->ifma_llifma == NULL);
SLIST_INSERT_HEAD(inmh, inm, in6m_nrele);
}
}
struct ip6_moptions;
struct sockopt;
struct inpcbinfo;
struct rib_head;
/* Multicast KPIs. */
int im6o_mc_filter(const struct ip6_moptions *, const struct ifnet *,
const struct sockaddr *, const struct sockaddr *);
int in6_joingroup(struct ifnet *, const struct in6_addr *,
struct in6_mfilter *, struct in6_multi **, int);
int in6_leavegroup(struct in6_multi *, struct in6_mfilter *);
int in6_leavegroup_locked(struct in6_multi *, struct in6_mfilter *);
void in6m_clear_recorded(struct in6_multi *);
void in6m_commit(struct in6_multi *);
void in6m_print(const struct in6_multi *);
int in6m_record_source(struct in6_multi *, const struct in6_addr *);
void in6m_release_list_deferred(struct in6_multi_head *);
void in6m_release_wait(void *);
void ip6_freemoptions(struct ip6_moptions *);
int ip6_getmoptions(struct inpcb *, struct sockopt *);
int ip6_setmoptions(struct inpcb *, struct sockopt *);
/* flags to in6_update_ifa */
#define IN6_IFAUPDATE_DADDELAY 0x1 /* first time to configure an address */
int in6_mask2len(struct in6_addr *, u_char *);
int in6_control(struct socket *, u_long, void *, struct ifnet *,
struct thread *);
int in6_update_ifa(struct ifnet *, struct in6_aliasreq *,
struct in6_ifaddr *, int);
void in6_prepare_ifra(struct in6_aliasreq *, const struct in6_addr *,
const struct in6_addr *);
int in6_addifaddr(struct ifnet *, struct in6_aliasreq *, struct in6_ifaddr *);
void in6_purgeaddr(struct ifaddr *);
void in6_purgeifaddr(struct in6_ifaddr *);
int in6if_do_dad(struct ifnet *);
void in6_savemkludge(struct in6_ifaddr *);
void *in6_domifattach(struct ifnet *);
void in6_domifdetach(struct ifnet *, void *);
int in6_domifmtu(struct ifnet *);
struct rib_head *in6_inithead(uint32_t fibnum);
void in6_detachhead(struct rib_head *rh);
void in6_setmaxmtu(void);
int in6_if2idlen(struct ifnet *);
struct in6_ifaddr *in6ifa_ifpforlinklocal(struct ifnet *, int);
struct in6_ifaddr *in6ifa_ifpwithaddr(struct ifnet *, const struct in6_addr *);
struct in6_ifaddr *in6ifa_ifwithaddr(const struct in6_addr *, uint32_t, bool);
struct in6_ifaddr *in6ifa_llaonifp(struct ifnet *);
int in6_addr2zoneid(struct ifnet *, struct in6_addr *, u_int32_t *);
int in6_matchlen(struct in6_addr *, struct in6_addr *);
int in6_are_prefix_equal(struct in6_addr *, struct in6_addr *, int);
void in6_prefixlen2mask(struct in6_addr *, int);
int in6_prefix_ioctl(struct socket *, u_long, caddr_t,
struct ifnet *);
int in6_prefix_add_ifid(int, struct in6_ifaddr *);
void in6_prefix_remove_ifid(int, struct in6_ifaddr *);
void in6_purgeprefix(struct ifnet *);
int in6_is_addr_deprecated(struct sockaddr_in6 *);
int in6_src_ioctl(u_long, caddr_t);
void in6_newaddrmsg(struct in6_ifaddr *, int);
void in6_purge_proxy_ndp(struct ifnet *);
/*
* Extended API for IPv6 FIB support.
*/
struct mbuf *ip6_tryforward(struct mbuf *);
#endif /* _KERNEL */
#endif /* _NETINET6_IN6_VAR_H_ */
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