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1275 |
phoenix |
/*
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* Linux INET6 implementation
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*
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* Authors:
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* Pedro Roque <roque@di.fc.ul.pt>
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*
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* $Id: ipv6.h,v 1.1.1.1 2004-04-15 02:34:20 phoenix Exp $
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _NET_IPV6_H
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#define _NET_IPV6_H
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#include <linux/ipv6.h>
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#include <asm/hardirq.h>
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#include <net/ndisc.h>
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#include <net/flow.h>
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#define SIN6_LEN_RFC2133 24
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/*
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* NextHeader field of IPv6 header
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*/
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#define NEXTHDR_HOP 0 /* Hop-by-hop option header. */
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#define NEXTHDR_TCP 6 /* TCP segment. */
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#define NEXTHDR_UDP 17 /* UDP message. */
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#define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */
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#define NEXTHDR_ROUTING 43 /* Routing header. */
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#define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */
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#define NEXTHDR_ESP 50 /* Encapsulating security payload. */
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#define NEXTHDR_AUTH 51 /* Authentication header. */
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#define NEXTHDR_ICMP 58 /* ICMP for IPv6. */
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#define NEXTHDR_NONE 59 /* No next header */
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#define NEXTHDR_DEST 60 /* Destination options header. */
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#define NEXTHDR_MAX 255
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#define IPV6_DEFAULT_HOPLIMIT 64
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#define IPV6_DEFAULT_MCASTHOPS 1
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/*
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* Addr type
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*
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* type - unicast | multicast | anycast
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* scope - local | site | global
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* v4 - compat
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* v4mapped
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* any
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* loopback
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*/
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#define IPV6_ADDR_ANY 0x0000U
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#define IPV6_ADDR_UNICAST 0x0001U
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#define IPV6_ADDR_MULTICAST 0x0002U
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#define IPV6_ADDR_ANYCAST 0x0004U
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#define IPV6_ADDR_LOOPBACK 0x0010U
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#define IPV6_ADDR_LINKLOCAL 0x0020U
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#define IPV6_ADDR_SITELOCAL 0x0040U
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#define IPV6_ADDR_COMPATv4 0x0080U
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#define IPV6_ADDR_SCOPE_MASK 0x00f0U
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#define IPV6_ADDR_MAPPED 0x1000U
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#define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
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/*
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* Addr scopes
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*/
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#ifdef __KERNEL__
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#define IPV6_ADDR_MC_SCOPE(a) \
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((a)->s6_addr[1] & 0x0f) /* nonstandard */
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#define __IPV6_ADDR_SCOPE_INVALID -1
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#endif
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#define IPV6_ADDR_SCOPE_NODELOCAL 0x01
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#define IPV6_ADDR_SCOPE_LINKLOCAL 0x02
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#define IPV6_ADDR_SCOPE_SITELOCAL 0x05
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#define IPV6_ADDR_SCOPE_ORGLOCAL 0x08
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#define IPV6_ADDR_SCOPE_GLOBAL 0x0e
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/*
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* fragmentation header
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*/
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struct frag_hdr {
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unsigned char nexthdr;
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unsigned char reserved;
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unsigned short frag_off;
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__u32 identification;
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};
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#ifdef __KERNEL__
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#include <net/sock.h>
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/* sysctls */
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extern int sysctl_ipv6_bindv6only;
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extern int sysctl_mld_max_msf;
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extern struct ipv6_mib ipv6_statistics[NR_CPUS*2];
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#define IP6_INC_STATS(field) SNMP_INC_STATS(ipv6_statistics, field)
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#define IP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(ipv6_statistics, field)
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#define IP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(ipv6_statistics, field)
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extern struct icmpv6_mib icmpv6_statistics[NR_CPUS*2];
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#define ICMP6_INC_STATS(field) SNMP_INC_STATS(icmpv6_statistics, field)
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#define ICMP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(icmpv6_statistics, field)
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#define ICMP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(icmpv6_statistics, field)
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extern struct udp_mib udp_stats_in6[NR_CPUS*2];
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#define UDP6_INC_STATS(field) SNMP_INC_STATS(udp_stats_in6, field)
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#define UDP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_stats_in6, field)
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#define UDP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_stats_in6, field)
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extern atomic_t inet6_sock_nr;
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struct ip6_ra_chain
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{
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struct ip6_ra_chain *next;
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struct sock *sk;
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int sel;
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void (*destructor)(struct sock *);
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};
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extern struct ip6_ra_chain *ip6_ra_chain;
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extern rwlock_t ip6_ra_lock;
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/*
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This structure is prepared by protocol, when parsing
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ancillary data and passed to IPv6.
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*/
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struct ipv6_txoptions
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{
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/* Length of this structure */
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int tot_len;
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/* length of extension headers */
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__u16 opt_flen; /* after fragment hdr */
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__u16 opt_nflen; /* before fragment hdr */
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struct ipv6_opt_hdr *hopopt;
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struct ipv6_opt_hdr *dst0opt;
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struct ipv6_rt_hdr *srcrt; /* Routing Header */
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struct ipv6_opt_hdr *auth;
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struct ipv6_opt_hdr *dst1opt;
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/* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
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};
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struct ip6_flowlabel
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{
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struct ip6_flowlabel *next;
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u32 label;
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struct in6_addr dst;
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struct ipv6_txoptions *opt;
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atomic_t users;
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u32 linger;
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u8 share;
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u32 owner;
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unsigned long lastuse;
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unsigned long expires;
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};
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#define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF)
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#define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF)
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| 175 |
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struct ipv6_fl_socklist
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{
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struct ipv6_fl_socklist *next;
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struct ip6_flowlabel *fl;
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};
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extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, u32 label);
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extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
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struct ip6_flowlabel * fl,
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struct ipv6_txoptions * fopt);
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extern void fl6_free_socklist(struct sock *sk);
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extern int ipv6_flowlabel_opt(struct sock *sk, char *optval, int optlen);
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extern void ip6_flowlabel_init(void);
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extern void ip6_flowlabel_cleanup(void);
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| 190 |
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static inline void fl6_sock_release(struct ip6_flowlabel *fl)
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{
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| 192 |
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if (fl)
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atomic_dec(&fl->users);
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}
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| 196 |
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extern int ip6_ra_control(struct sock *sk, int sel,
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void (*destructor)(struct sock *));
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| 199 |
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| 200 |
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extern int ip6_call_ra_chain(struct sk_buff *skb, int sel);
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| 202 |
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extern int ipv6_reassembly(struct sk_buff **skb, int);
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| 203 |
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| 204 |
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extern int ipv6_parse_hopopts(struct sk_buff *skb, int);
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| 206 |
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extern int ipv6_parse_exthdrs(struct sk_buff **skb, int);
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| 208 |
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extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt);
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| 209 |
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| 210 |
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extern int ip6_frag_nqueues;
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| 211 |
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extern atomic_t ip6_frag_mem;
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| 212 |
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| 213 |
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#define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */
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| 215 |
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/*
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| 216 |
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* Function prototype for build_xmit
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| 217 |
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*/
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| 218 |
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| 219 |
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typedef int (*inet_getfrag_t) (const void *data,
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| 220 |
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struct in6_addr *addr,
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char *,
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unsigned int, unsigned int);
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| 223 |
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| 224 |
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| 225 |
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extern int ipv6_addr_type(const struct in6_addr *addr);
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| 227 |
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static inline int ipv6_addr_scope(const struct in6_addr *addr)
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| 228 |
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{
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| 229 |
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return ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
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| 230 |
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}
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| 231 |
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| 232 |
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static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
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{
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| 234 |
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return memcmp((const void *) a1, (const void *) a2, sizeof(struct in6_addr));
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| 235 |
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}
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| 236 |
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| 237 |
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static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
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| 238 |
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{
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| 239 |
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memcpy((void *) a1, (const void *) a2, sizeof(struct in6_addr));
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| 240 |
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}
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| 241 |
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| 242 |
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#ifndef __HAVE_ARCH_ADDR_SET
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| 243 |
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static inline void ipv6_addr_set(struct in6_addr *addr,
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| 244 |
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__u32 w1, __u32 w2,
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| 245 |
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__u32 w3, __u32 w4)
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| 246 |
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{
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| 247 |
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addr->s6_addr32[0] = w1;
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| 248 |
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addr->s6_addr32[1] = w2;
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| 249 |
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addr->s6_addr32[2] = w3;
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| 250 |
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addr->s6_addr32[3] = w4;
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| 251 |
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}
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| 252 |
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#endif
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| 253 |
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| 254 |
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static inline int ipv6_addr_any(const struct in6_addr *a)
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| 255 |
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{
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| 256 |
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return ((a->s6_addr32[0] | a->s6_addr32[1] |
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| 257 |
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a->s6_addr32[2] | a->s6_addr32[3] ) == 0);
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| 258 |
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}
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| 259 |
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| 260 |
|
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/*
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| 261 |
|
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* Prototypes exported by ipv6
|
| 262 |
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*/
|
| 263 |
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|
| 264 |
|
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/*
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| 265 |
|
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* rcv function (called from netdevice level)
|
| 266 |
|
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*/
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| 267 |
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| 268 |
|
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extern int ipv6_rcv(struct sk_buff *skb,
|
| 269 |
|
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struct net_device *dev,
|
| 270 |
|
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struct packet_type *pt);
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| 271 |
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|
| 272 |
|
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/*
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| 273 |
|
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* upper-layer output functions
|
| 274 |
|
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*/
|
| 275 |
|
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extern int ip6_xmit(struct sock *sk,
|
| 276 |
|
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struct sk_buff *skb,
|
| 277 |
|
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struct flowi *fl,
|
| 278 |
|
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struct ipv6_txoptions *opt);
|
| 279 |
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|
| 280 |
|
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extern int ip6_nd_hdr(struct sock *sk,
|
| 281 |
|
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struct sk_buff *skb,
|
| 282 |
|
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struct net_device *dev,
|
| 283 |
|
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struct in6_addr *saddr,
|
| 284 |
|
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struct in6_addr *daddr,
|
| 285 |
|
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int proto, int len);
|
| 286 |
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|
| 287 |
|
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extern int ip6_build_xmit(struct sock *sk,
|
| 288 |
|
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inet_getfrag_t getfrag,
|
| 289 |
|
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const void *data,
|
| 290 |
|
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struct flowi *fl,
|
| 291 |
|
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unsigned length,
|
| 292 |
|
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struct ipv6_txoptions *opt,
|
| 293 |
|
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int hlimit, int flags);
|
| 294 |
|
|
|
| 295 |
|
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/*
|
| 296 |
|
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* skb processing functions
|
| 297 |
|
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*/
|
| 298 |
|
|
|
| 299 |
|
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extern int ip6_output(struct sk_buff *skb);
|
| 300 |
|
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extern int ip6_forward(struct sk_buff *skb);
|
| 301 |
|
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extern int ip6_input(struct sk_buff *skb);
|
| 302 |
|
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extern int ip6_mc_input(struct sk_buff *skb);
|
| 303 |
|
|
|
| 304 |
|
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/*
|
| 305 |
|
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* Extension header (options) processing
|
| 306 |
|
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*/
|
| 307 |
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|
|
| 308 |
|
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extern u8 * ipv6_build_nfrag_opts(struct sk_buff *skb,
|
| 309 |
|
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u8 *prev_hdr,
|
| 310 |
|
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struct ipv6_txoptions *opt,
|
| 311 |
|
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struct in6_addr *daddr,
|
| 312 |
|
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u32 jumbolen);
|
| 313 |
|
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extern u8 * ipv6_build_frag_opts(struct sk_buff *skb,
|
| 314 |
|
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u8 *prev_hdr,
|
| 315 |
|
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struct ipv6_txoptions *opt);
|
| 316 |
|
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extern void ipv6_push_nfrag_opts(struct sk_buff *skb,
|
| 317 |
|
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struct ipv6_txoptions *opt,
|
| 318 |
|
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u8 *proto,
|
| 319 |
|
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struct in6_addr **daddr_p);
|
| 320 |
|
|
extern void ipv6_push_frag_opts(struct sk_buff *skb,
|
| 321 |
|
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struct ipv6_txoptions *opt,
|
| 322 |
|
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u8 *proto);
|
| 323 |
|
|
|
| 324 |
|
|
extern int ipv6_skip_exthdr(const struct sk_buff *, int start,
|
| 325 |
|
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u8 *nexthdrp, int len);
|
| 326 |
|
|
|
| 327 |
|
|
extern int ipv6_ext_hdr(u8 nexthdr);
|
| 328 |
|
|
|
| 329 |
|
|
extern struct ipv6_txoptions * ipv6_invert_rthdr(struct sock *sk,
|
| 330 |
|
|
struct ipv6_rt_hdr *hdr);
|
| 331 |
|
|
|
| 332 |
|
|
|
| 333 |
|
|
/*
|
| 334 |
|
|
* socket options (ipv6_sockglue.c)
|
| 335 |
|
|
*/
|
| 336 |
|
|
|
| 337 |
|
|
extern int ipv6_setsockopt(struct sock *sk, int level,
|
| 338 |
|
|
int optname, char *optval,
|
| 339 |
|
|
int optlen);
|
| 340 |
|
|
extern int ipv6_getsockopt(struct sock *sk, int level,
|
| 341 |
|
|
int optname, char *optval,
|
| 342 |
|
|
int *optlen);
|
| 343 |
|
|
|
| 344 |
|
|
extern void ipv6_packet_init(void);
|
| 345 |
|
|
|
| 346 |
|
|
extern void ipv6_netdev_notif_init(void);
|
| 347 |
|
|
|
| 348 |
|
|
extern void ipv6_packet_cleanup(void);
|
| 349 |
|
|
|
| 350 |
|
|
extern void ipv6_netdev_notif_cleanup(void);
|
| 351 |
|
|
|
| 352 |
|
|
extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len);
|
| 353 |
|
|
extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, u16 port,
|
| 354 |
|
|
u32 info, u8 *payload);
|
| 355 |
|
|
extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
|
| 356 |
|
|
|
| 357 |
|
|
extern int inet6_release(struct socket *sock);
|
| 358 |
|
|
extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr,
|
| 359 |
|
|
int addr_len);
|
| 360 |
|
|
extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
|
| 361 |
|
|
int *uaddr_len, int peer);
|
| 362 |
|
|
extern int inet6_ioctl(struct socket *sock, unsigned int cmd,
|
| 363 |
|
|
unsigned long arg);
|
| 364 |
|
|
|
| 365 |
|
|
#endif /* __KERNEL__ */
|
| 366 |
|
|
#endif /* _NET_IPV6_H */
|
| 367 |
|
|
|
| 368 |
|
|
|
| 369 |
|
|
|
