| /* |
| * Linux INET6 implementation |
| * |
| * Authors: |
| * Pedro Roque <roque@di.fc.ul.pt> |
| * |
| * $Id: ipv6.h,v 1.23 2000-12-13 18:31:48 davem Exp $ |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #ifndef _NET_IPV6_H |
| #define _NET_IPV6_H |
| |
| #include <linux/ipv6.h> |
| #include <asm/hardirq.h> |
| #include <net/ndisc.h> |
| #include <net/flow.h> |
| |
| #define SIN6_LEN_RFC2133 24 |
| |
| /* |
| * NextHeader field of IPv6 header |
| */ |
| |
| #define NEXTHDR_HOP 0 /* Hop-by-hop option header. */ |
| #define NEXTHDR_TCP 6 /* TCP segment. */ |
| #define NEXTHDR_UDP 17 /* UDP message. */ |
| #define NEXTHDR_IPV6 41 /* IPv6 in IPv6 */ |
| #define NEXTHDR_ROUTING 43 /* Routing header. */ |
| #define NEXTHDR_FRAGMENT 44 /* Fragmentation/reassembly header. */ |
| #define NEXTHDR_ESP 50 /* Encapsulating security payload. */ |
| #define NEXTHDR_AUTH 51 /* Authentication header. */ |
| #define NEXTHDR_ICMP 58 /* ICMP for IPv6. */ |
| #define NEXTHDR_NONE 59 /* No next header */ |
| #define NEXTHDR_DEST 60 /* Destination options header. */ |
| |
| #define NEXTHDR_MAX 255 |
| |
| |
| |
| #define IPV6_DEFAULT_HOPLIMIT 64 |
| #define IPV6_DEFAULT_MCASTHOPS 1 |
| |
| /* |
| * Addr type |
| * |
| * type - unicast | multicast | anycast |
| * scope - local | site | global |
| * v4 - compat |
| * v4mapped |
| * any |
| * loopback |
| */ |
| |
| #define IPV6_ADDR_ANY 0x0000U |
| |
| #define IPV6_ADDR_UNICAST 0x0001U |
| #define IPV6_ADDR_MULTICAST 0x0002U |
| #define IPV6_ADDR_ANYCAST 0x0004U |
| |
| #define IPV6_ADDR_LOOPBACK 0x0010U |
| #define IPV6_ADDR_LINKLOCAL 0x0020U |
| #define IPV6_ADDR_SITELOCAL 0x0040U |
| |
| #define IPV6_ADDR_COMPATv4 0x0080U |
| |
| #define IPV6_ADDR_SCOPE_MASK 0x00f0U |
| |
| #define IPV6_ADDR_MAPPED 0x1000U |
| #define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */ |
| |
| /* |
| * fragmentation header |
| */ |
| |
| struct frag_hdr { |
| unsigned char nexthdr; |
| unsigned char reserved; |
| unsigned short frag_off; |
| __u32 identification; |
| }; |
| |
| #ifdef __KERNEL__ |
| |
| #include <net/sock.h> |
| |
| extern struct ipv6_mib ipv6_statistics[NR_CPUS*2]; |
| #define IP6_INC_STATS(field) SNMP_INC_STATS(ipv6_statistics, field) |
| #define IP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(ipv6_statistics, field) |
| #define IP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(ipv6_statistics, field) |
| extern struct icmpv6_mib icmpv6_statistics[NR_CPUS*2]; |
| #define ICMP6_INC_STATS(field) SNMP_INC_STATS(icmpv6_statistics, field) |
| #define ICMP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(icmpv6_statistics, field) |
| #define ICMP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(icmpv6_statistics, field) |
| extern struct udp_mib udp_stats_in6[NR_CPUS*2]; |
| #define UDP6_INC_STATS(field) SNMP_INC_STATS(udp_stats_in6, field) |
| #define UDP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_stats_in6, field) |
| #define UDP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_stats_in6, field) |
| extern atomic_t inet6_sock_nr; |
| |
| struct ip6_ra_chain |
| { |
| struct ip6_ra_chain *next; |
| struct sock *sk; |
| int sel; |
| void (*destructor)(struct sock *); |
| }; |
| |
| extern struct ip6_ra_chain *ip6_ra_chain; |
| extern rwlock_t ip6_ra_lock; |
| |
| /* |
| This structure is prepared by protocol, when parsing |
| ancillary data and passed to IPv6. |
| */ |
| |
| struct ipv6_txoptions |
| { |
| /* Length of this structure */ |
| int tot_len; |
| |
| /* length of extension headers */ |
| |
| __u16 opt_flen; /* after fragment hdr */ |
| __u16 opt_nflen; /* before fragment hdr */ |
| |
| struct ipv6_opt_hdr *hopopt; |
| struct ipv6_opt_hdr *dst0opt; |
| struct ipv6_rt_hdr *srcrt; /* Routing Header */ |
| struct ipv6_opt_hdr *auth; |
| struct ipv6_opt_hdr *dst1opt; |
| |
| /* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */ |
| }; |
| |
| struct ip6_flowlabel |
| { |
| struct ip6_flowlabel *next; |
| u32 label; |
| struct in6_addr dst; |
| struct ipv6_txoptions *opt; |
| atomic_t users; |
| u32 linger; |
| u8 share; |
| u32 owner; |
| unsigned long lastuse; |
| unsigned long expires; |
| }; |
| |
| #define IPV6_FLOWINFO_MASK __constant_htonl(0x0FFFFFFF) |
| #define IPV6_FLOWLABEL_MASK __constant_htonl(0x000FFFFF) |
| |
| struct ipv6_fl_socklist |
| { |
| struct ipv6_fl_socklist *next; |
| struct ip6_flowlabel *fl; |
| }; |
| |
| extern struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, u32 label); |
| extern struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space, |
| struct ip6_flowlabel * fl, |
| struct ipv6_txoptions * fopt); |
| extern void fl6_free_socklist(struct sock *sk); |
| extern int ipv6_flowlabel_opt(struct sock *sk, char *optval, int optlen); |
| extern void ip6_flowlabel_init(void); |
| extern void ip6_flowlabel_cleanup(void); |
| |
| static inline void fl6_sock_release(struct ip6_flowlabel *fl) |
| { |
| if (fl) |
| atomic_dec(&fl->users); |
| } |
| |
| extern int ip6_ra_control(struct sock *sk, int sel, |
| void (*destructor)(struct sock *)); |
| |
| |
| extern int ip6_call_ra_chain(struct sk_buff *skb, int sel); |
| |
| extern int ipv6_reassembly(struct sk_buff **skb, int); |
| |
| extern int ipv6_parse_hopopts(struct sk_buff *skb, int); |
| |
| extern int ipv6_parse_exthdrs(struct sk_buff **skb, int); |
| |
| extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); |
| |
| extern int ip6_frag_nqueues; |
| extern atomic_t ip6_frag_mem; |
| |
| #define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */ |
| |
| /* |
| * Function prototype for build_xmit |
| */ |
| |
| typedef int (*inet_getfrag_t) (const void *data, |
| struct in6_addr *addr, |
| char *, |
| unsigned int, unsigned int); |
| |
| |
| extern int ipv6_addr_type(struct in6_addr *addr); |
| |
| static inline int ipv6_addr_scope(struct in6_addr *addr) |
| { |
| return ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
| } |
| |
| static inline int ipv6_addr_cmp(struct in6_addr *a1, struct in6_addr *a2) |
| { |
| return memcmp((void *) a1, (void *) a2, sizeof(struct in6_addr)); |
| } |
| |
| static inline void ipv6_addr_copy(struct in6_addr *a1, struct in6_addr *a2) |
| { |
| memcpy((void *) a1, (void *) a2, sizeof(struct in6_addr)); |
| } |
| |
| #ifndef __HAVE_ARCH_ADDR_SET |
| static inline void ipv6_addr_set(struct in6_addr *addr, |
| __u32 w1, __u32 w2, |
| __u32 w3, __u32 w4) |
| { |
| addr->s6_addr32[0] = w1; |
| addr->s6_addr32[1] = w2; |
| addr->s6_addr32[2] = w3; |
| addr->s6_addr32[3] = w4; |
| } |
| #endif |
| |
| static inline int ipv6_addr_any(struct in6_addr *a) |
| { |
| return ((a->s6_addr32[0] | a->s6_addr32[1] | |
| a->s6_addr32[2] | a->s6_addr32[3] ) == 0); |
| } |
| |
| /* |
| * Prototypes exported by ipv6 |
| */ |
| |
| /* |
| * rcv function (called from netdevice level) |
| */ |
| |
| extern int ipv6_rcv(struct sk_buff *skb, |
| struct net_device *dev, |
| struct packet_type *pt); |
| |
| /* |
| * upper-layer output functions |
| */ |
| extern int ip6_xmit(struct sock *sk, |
| struct sk_buff *skb, |
| struct flowi *fl, |
| struct ipv6_txoptions *opt); |
| |
| extern int ip6_nd_hdr(struct sock *sk, |
| struct sk_buff *skb, |
| struct net_device *dev, |
| struct in6_addr *saddr, |
| struct in6_addr *daddr, |
| int proto, int len); |
| |
| extern int ip6_build_xmit(struct sock *sk, |
| inet_getfrag_t getfrag, |
| const void *data, |
| struct flowi *fl, |
| unsigned length, |
| struct ipv6_txoptions *opt, |
| int hlimit, int flags); |
| |
| /* |
| * skb processing functions |
| */ |
| |
| extern int ip6_output(struct sk_buff *skb); |
| extern int ip6_forward(struct sk_buff *skb); |
| extern int ip6_input(struct sk_buff *skb); |
| extern int ip6_mc_input(struct sk_buff *skb); |
| |
| /* |
| * Extension header (options) processing |
| */ |
| |
| extern u8 * ipv6_build_nfrag_opts(struct sk_buff *skb, |
| u8 *prev_hdr, |
| struct ipv6_txoptions *opt, |
| struct in6_addr *daddr, |
| u32 jumbolen); |
| extern u8 * ipv6_build_frag_opts(struct sk_buff *skb, |
| u8 *prev_hdr, |
| struct ipv6_txoptions *opt); |
| extern void ipv6_push_nfrag_opts(struct sk_buff *skb, |
| struct ipv6_txoptions *opt, |
| u8 *proto, |
| struct in6_addr **daddr_p); |
| extern void ipv6_push_frag_opts(struct sk_buff *skb, |
| struct ipv6_txoptions *opt, |
| u8 *proto); |
| |
| extern int ipv6_skip_exthdr(struct sk_buff *, int start, |
| u8 *nexthdrp, int len); |
| |
| extern int ipv6_ext_hdr(u8 nexthdr); |
| |
| extern struct ipv6_txoptions * ipv6_invert_rthdr(struct sock *sk, |
| struct ipv6_rt_hdr *hdr); |
| |
| |
| /* |
| * socket options (ipv6_sockglue.c) |
| */ |
| |
| extern int ipv6_setsockopt(struct sock *sk, int level, |
| int optname, char *optval, |
| int optlen); |
| extern int ipv6_getsockopt(struct sock *sk, int level, |
| int optname, char *optval, |
| int *optlen); |
| |
| extern void ipv6_packet_init(void); |
| |
| extern void ipv6_netdev_notif_init(void); |
| |
| extern void ipv6_packet_cleanup(void); |
| |
| extern void ipv6_netdev_notif_cleanup(void); |
| |
| extern int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len); |
| extern void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, u16 port, |
| u32 info, u8 *payload); |
| extern void ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info); |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _NET_IPV6_H */ |
| |
| |
| |