| /* |
| * Linux INET6 implementation |
| * |
| * Authors: |
| * Pedro Roque <roque@di.fc.ul.pt> |
| * |
| * $Id: ipv6.h,v 1.1 2002/05/20 15:13:07 jgrimm 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 <linux/hardirq.h> |
| #include <net/ndisc.h> |
| #include <net/flow.h> |
| #include <net/snmp.h> |
| |
| #define SIN6_LEN_RFC2133 24 |
| |
| #define IPV6_MAXPLEN 65535 |
| |
| /* |
| * 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 |
| * 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_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 */ |
| |
| /* |
| * Addr scopes |
| */ |
| #ifdef __KERNEL__ |
| #define IPV6_ADDR_MC_SCOPE(a) \ |
| ((a)->s6_addr[1] & 0x0f) /* nonstandard */ |
| #define __IPV6_ADDR_SCOPE_INVALID -1 |
| #endif |
| #define IPV6_ADDR_SCOPE_NODELOCAL 0x01 |
| #define IPV6_ADDR_SCOPE_LINKLOCAL 0x02 |
| #define IPV6_ADDR_SCOPE_SITELOCAL 0x05 |
| #define IPV6_ADDR_SCOPE_ORGLOCAL 0x08 |
| #define IPV6_ADDR_SCOPE_GLOBAL 0x0e |
| |
| /* |
| * fragmentation header |
| */ |
| |
| struct frag_hdr { |
| unsigned char nexthdr; |
| unsigned char reserved; |
| unsigned short frag_off; |
| __u32 identification; |
| }; |
| |
| #define IP6_MF 0x0001 |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/config.h> |
| #include <net/sock.h> |
| |
| /* sysctls */ |
| extern int sysctl_ipv6_bindv6only; |
| extern int sysctl_mld_max_msf; |
| |
| /* MIBs */ |
| DECLARE_SNMP_STAT(struct ipstats_mib, ipv6_statistics); |
| #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) |
| DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics); |
| #define ICMP6_INC_STATS(idev, field) ({ \ |
| struct inet6_dev *_idev = (idev); \ |
| if (likely(_idev != NULL)) \ |
| SNMP_INC_STATS(idev->stats.icmpv6, field); \ |
| SNMP_INC_STATS(icmpv6_statistics, field); \ |
| }) |
| #define ICMP6_INC_STATS_BH(idev, field) ({ \ |
| struct inet6_dev *_idev = (idev); \ |
| if (likely(_idev != NULL)) \ |
| SNMP_INC_STATS_BH((_idev)->stats.icmpv6, field); \ |
| SNMP_INC_STATS_BH(icmpv6_statistics, field); \ |
| }) |
| #define ICMP6_INC_STATS_USER(idev, field) ({ \ |
| struct inet6_dev *_idev = (idev); \ |
| if (likely(_idev != NULL)) \ |
| SNMP_INC_STATS_USER(_idev->stats.icmpv6, field); \ |
| SNMP_INC_STATS_USER(icmpv6_statistics, field); \ |
| }) |
| #define ICMP6_INC_STATS_OFFSET_BH(idev, field, offset) ({ \ |
| struct inet6_dev *_idev = idev; \ |
| __typeof__(offset) _offset = (offset); \ |
| if (likely(_idev != NULL)) \ |
| SNMP_INC_STATS_OFFSET_BH(_idev->stats.icmpv6, field, _offset); \ |
| SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset); \ |
| }) |
| DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6); |
| #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) |
| |
| int snmp6_register_dev(struct inet6_dev *idev); |
| int snmp6_unregister_dev(struct inet6_dev *idev); |
| int snmp6_alloc_dev(struct inet6_dev *idev); |
| int snmp6_free_dev(struct inet6_dev *idev); |
| int snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign); |
| void snmp6_mib_free(void *ptr[2]); |
| |
| 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 *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; |
| unsigned long 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 __user *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 ipv6_parse_hopopts(struct sk_buff *skb, int); |
| |
| extern struct ipv6_txoptions * ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt); |
| extern struct ipv6_txoptions * ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt, |
| int newtype, |
| struct ipv6_opt_hdr __user *newopt, |
| int newoptlen); |
| struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, |
| struct ipv6_txoptions *opt); |
| |
| extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb); |
| |
| 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(const struct in6_addr *addr); |
| static inline int ipv6_addr_type(const struct in6_addr *addr) |
| { |
| return __ipv6_addr_type(addr) & 0xffff; |
| } |
| |
| static inline int ipv6_addr_scope(const struct in6_addr *addr) |
| { |
| return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK; |
| } |
| |
| static inline int __ipv6_addr_src_scope(int type) |
| { |
| return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16)); |
| } |
| |
| static inline int ipv6_addr_src_scope(const struct in6_addr *addr) |
| { |
| return __ipv6_addr_src_scope(__ipv6_addr_type(addr)); |
| } |
| |
| static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2) |
| { |
| return memcmp((const void *) a1, (const void *) a2, sizeof(struct in6_addr)); |
| } |
| |
| static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2) |
| { |
| memcpy((void *) a1, (const void *) a2, sizeof(struct in6_addr)); |
| } |
| |
| static inline void ipv6_addr_prefix(struct in6_addr *pfx, |
| const struct in6_addr *addr, |
| int plen) |
| { |
| /* caller must guarantee 0 <= plen <= 128 */ |
| int o = plen >> 3, |
| b = plen & 0x7; |
| |
| memcpy(pfx->s6_addr, addr, o); |
| if (b != 0) { |
| pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b); |
| o++; |
| } |
| if (o < 16) |
| memset(pfx->s6_addr + o, 0, 16 - o); |
| } |
| |
| #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_equal(const struct in6_addr *a1, |
| const struct in6_addr *a2) |
| { |
| return (a1->s6_addr32[0] == a2->s6_addr32[0] && |
| a1->s6_addr32[1] == a2->s6_addr32[1] && |
| a1->s6_addr32[2] == a2->s6_addr32[2] && |
| a1->s6_addr32[3] == a2->s6_addr32[3]); |
| } |
| |
| static inline int __ipv6_prefix_equal(const u32 *a1, const u32 *a2, |
| unsigned int prefixlen) |
| { |
| unsigned pdw, pbi; |
| |
| /* check complete u32 in prefix */ |
| pdw = prefixlen >> 5; |
| if (pdw && memcmp(a1, a2, pdw << 2)) |
| return 0; |
| |
| /* check incomplete u32 in prefix */ |
| pbi = prefixlen & 0x1f; |
| if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi)))) |
| return 0; |
| |
| return 1; |
| } |
| |
| static inline int ipv6_prefix_equal(const struct in6_addr *a1, |
| const struct in6_addr *a2, |
| unsigned int prefixlen) |
| { |
| return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32, |
| prefixlen); |
| } |
| |
| static inline int ipv6_addr_any(const struct in6_addr *a) |
| { |
| return ((a->s6_addr32[0] | a->s6_addr32[1] | |
| a->s6_addr32[2] | a->s6_addr32[3] ) == 0); |
| } |
| |
| /* |
| * find the first different bit between two addresses |
| * length of address must be a multiple of 32bits |
| */ |
| static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen) |
| { |
| const __u32 *a1 = token1, *a2 = token2; |
| int i; |
| |
| addrlen >>= 2; |
| |
| for (i = 0; i < addrlen; i++) { |
| __u32 xb = a1[i] ^ a2[i]; |
| if (xb) { |
| int j = 31; |
| |
| xb = ntohl(xb); |
| while ((xb & (1 << j)) == 0) |
| j--; |
| |
| return (i * 32 + 31 - j); |
| } |
| } |
| |
| /* |
| * we should *never* get to this point since that |
| * would mean the addrs are equal |
| * |
| * However, we do get to it 8) And exacly, when |
| * addresses are equal 8) |
| * |
| * ip route add 1111::/128 via ... |
| * ip route add 1111::/64 via ... |
| * and we are here. |
| * |
| * Ideally, this function should stop comparison |
| * at prefix length. It does not, but it is still OK, |
| * if returned value is greater than prefix length. |
| * --ANK (980803) |
| */ |
| return (addrlen << 5); |
| } |
| |
| static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2) |
| { |
| return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr)); |
| } |
| |
| /* |
| * 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, |
| struct net_device *orig_dev); |
| |
| extern int ip6_rcv_finish(struct sk_buff *skb); |
| |
| /* |
| * upper-layer output functions |
| */ |
| extern int ip6_xmit(struct sock *sk, |
| struct sk_buff *skb, |
| struct flowi *fl, |
| struct ipv6_txoptions *opt, |
| int ipfragok); |
| |
| 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_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr); |
| |
| extern int ip6_append_data(struct sock *sk, |
| int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), |
| void *from, |
| int length, |
| int transhdrlen, |
| int hlimit, |
| int tclass, |
| struct ipv6_txoptions *opt, |
| struct flowi *fl, |
| struct rt6_info *rt, |
| unsigned int flags); |
| |
| extern int ip6_push_pending_frames(struct sock *sk); |
| |
| extern void ip6_flush_pending_frames(struct sock *sk); |
| |
| extern int ip6_dst_lookup(struct sock *sk, |
| struct dst_entry **dst, |
| struct flowi *fl); |
| |
| /* |
| * 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(const struct sk_buff *, int start, |
| u8 *nexthdrp); |
| |
| 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 __user *optval, |
| int optlen); |
| extern int ipv6_getsockopt(struct sock *sk, int level, |
| int optname, |
| char __user *optval, |
| int __user *optlen); |
| |
| extern void ipv6_packet_init(void); |
| |
| extern void ipv6_packet_cleanup(void); |
| |
| extern int ip6_datagram_connect(struct sock *sk, |
| struct sockaddr *addr, int addr_len); |
| |
| 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); |
| |
| extern int inet6_release(struct socket *sock); |
| extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, |
| int addr_len); |
| extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
| int *uaddr_len, int peer); |
| extern int inet6_ioctl(struct socket *sock, unsigned int cmd, |
| unsigned long arg); |
| |
| extern int inet6_hash_connect(struct inet_timewait_death_row *death_row, |
| struct sock *sk); |
| |
| /* |
| * reassembly.c |
| */ |
| extern int sysctl_ip6frag_high_thresh; |
| extern int sysctl_ip6frag_low_thresh; |
| extern int sysctl_ip6frag_time; |
| extern int sysctl_ip6frag_secret_interval; |
| |
| extern const struct proto_ops inet6_stream_ops; |
| extern const struct proto_ops inet6_dgram_ops; |
| |
| struct group_source_req; |
| struct group_filter; |
| |
| extern int ip6_mc_source(int add, int omode, struct sock *sk, |
| struct group_source_req *pgsr); |
| extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf); |
| extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, |
| struct group_filter __user *optval, |
| int __user *optlen); |
| |
| #ifdef CONFIG_PROC_FS |
| extern int ac6_proc_init(void); |
| extern void ac6_proc_exit(void); |
| extern int raw6_proc_init(void); |
| extern void raw6_proc_exit(void); |
| extern int tcp6_proc_init(void); |
| extern void tcp6_proc_exit(void); |
| extern int udp6_proc_init(void); |
| extern void udp6_proc_exit(void); |
| extern int ipv6_misc_proc_init(void); |
| extern void ipv6_misc_proc_exit(void); |
| |
| extern struct rt6_statistics rt6_stats; |
| #endif |
| |
| #ifdef CONFIG_SYSCTL |
| extern ctl_table ipv6_route_table[]; |
| extern ctl_table ipv6_icmp_table[]; |
| |
| extern void ipv6_sysctl_register(void); |
| extern void ipv6_sysctl_unregister(void); |
| #endif |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _NET_IPV6_H */ |
